+++ /dev/null
-/* GStreamer
- * Copyright (C) 2008 Nokia Corporation. All rights reserved.
- * Contact: Stefan Kost <stefan.kost@nokia.com>
- * Copyright (C) 2008 Sebastian Dröge <sebastian.droege@collabora.co.uk>.
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Library General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Library General Public License for more details.
- *
- * You should have received a copy of the GNU Library General Public
- * License along with this library; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 02111-1307, USA.
- */
-
-/**
- * SECTION:gstbaseparse
- * @short_description: Base class for stream parsers
- * @see_also: #GstBaseTransform
- *
- * This base class is for parser elements that process data and splits it
- * into separate audio/video/whatever frames.
- *
- * It provides for:
- * <itemizedlist>
- * <listitem><para>One sinkpad and one srcpad</para></listitem>
- * <listitem><para>Handles state changes</para></listitem>
- * <listitem><para>Does flushing</para></listitem>
- * <listitem><para>Push mode</para></listitem>
- * <listitem><para>Pull mode</para></listitem>
- * <listitem><para>Handles events (NEWSEGMENT/EOS/FLUSH)</para></listitem>
- * <listitem><para>Handles seeking in both modes</para></listitem>
- * <listitem><para>
- * Handles POSITION/DURATION/SEEKING/FORMAT/CONVERT queries
- * </para></listitem>
- * </itemizedlist>
- *
- * The purpose of this base class is to provide a basic functionality of
- * a parser and share a lot of rather complex code.
- *
- * Description of the parsing mechanism:
- * <orderedlist>
- * <listitem>
- * <itemizedlist><title>Set-up phase</title>
- * <listitem><para>
- * GstBaseParse class calls @set_sink_caps to inform the subclass about
- * incoming sinkpad caps. Subclass should set the srcpad caps accordingly.
- * </para></listitem>
- * <listitem><para>
- * GstBaseParse calls @start to inform subclass that data processing is
- * about to start now.
- * </para></listitem>
- * <listitem><para>
- * At least in this point subclass needs to tell the GstBaseParse class
- * how big data chunks it wants to receive (min_frame_size). It can do
- * this with @gst_base_parse_set_min_frame_size.
- * </para></listitem>
- * <listitem><para>
- * GstBaseParse class sets up appropriate data passing mode (pull/push)
- * and starts to process the data.
- * </para></listitem>
- * </itemizedlist>
- * </listitem>
- * <listitem>
- * <itemizedlist>
- * <title>Parsing phase</title>
- * <listitem><para>
- * GstBaseParse gathers at least min_frame_size bytes of data either
- * by pulling it from upstream or collecting buffers into internal
- * #GstAdapter.
- * </para></listitem>
- * <listitem><para>
- * A buffer of (at least) min_frame_size bytes is passed to subclass with
- * @check_valid_frame. Subclass checks the contents and returns TRUE
- * if the buffer contains a valid frame. It also needs to set the
- * @framesize according to the detected frame size. If buffer didn't
- * contain a valid frame, this call must return FALSE and optionally
- * set the @skipsize value to inform base class that how many bytes
- * it needs to skip in order to find a valid frame. @framesize can always
- * indicate a new minimum for current frame parsing. The passed buffer
- * is read-only. Note that @check_valid_frame might receive any small
- * amount of input data when leftover data is being drained (e.g. at EOS).
- * </para></listitem>
- * <listitem><para>
- * After valid frame is found, it will be passed again to subclass with
- * @parse_frame call. Now subclass is responsible for parsing the
- * frame contents and setting the caps, and buffer metadata (e.g.
- * buffer timestamp and duration, or keyframe if applicable).
- * (although the latter can also be done by GstBaseParse if it is
- * appropriately configured, see below). Frame is provided with
- * timestamp derived from upstream (as much as generally possible),
- * duration obtained form configuration (see below), and offset
- * if meaningful (in pull mode).
- * </para></listitem>
- * <listitem><para>
- * Finally the buffer can be pushed downstream and parsing loop starts
- * over again. Just prior to actually pushing the buffer in question,
- * it is passed to @pre_push_buffer which gives subclass yet one
- * last chance to examine buffer metadata, or to send some custom (tag)
- * events, or to perform custom (segment) filtering.
- * </para></listitem>
- * <listitem><para>
- * During the parsing process GstBaseParseClass will handle both srcpad and
- * sinkpad events. They will be passed to subclass if @event or
- * @src_event callbacks have been provided.
- * </para></listitem>
- * </itemizedlist>
- * </listitem>
- * <listitem>
- * <itemizedlist><title>Shutdown phase</title>
- * <listitem><para>
- * GstBaseParse class calls @stop to inform the subclass that data
- * parsing will be stopped.
- * </para></listitem>
- * </itemizedlist>
- * </listitem>
- * </orderedlist>
- *
- * Subclass is responsible for providing pad template caps for
- * source and sink pads. The pads need to be named "sink" and "src". It also
- * needs to set the fixed caps on srcpad, when the format is ensured (e.g.
- * when base class calls subclass' @set_sink_caps function).
- *
- * This base class uses GST_FORMAT_DEFAULT as a meaning of frames. So,
- * subclass conversion routine needs to know that conversion from
- * GST_FORMAT_TIME to GST_FORMAT_DEFAULT must return the
- * frame number that can be found from the given byte position.
- *
- * GstBaseParse uses subclasses conversion methods also for seeking (or otherwise
- * uses its own default one, see also below).
- *
- * Subclass @start and @stop functions will be called to inform the beginning
- * and end of data processing.
- *
- * Things that subclass need to take care of:
- * <itemizedlist>
- * <listitem><para>Provide pad templates</para></listitem>
- * <listitem><para>
- * Fixate the source pad caps when appropriate
- * </para></listitem>
- * <listitem><para>
- * Inform base class how big data chunks should be retrieved. This is
- * done with @gst_base_parse_set_min_frame_size function.
- * </para></listitem>
- * <listitem><para>
- * Examine data chunks passed to subclass with @check_valid_frame
- * and tell if they contain a valid frame
- * </para></listitem>
- * <listitem><para>
- * Set the caps and timestamp to frame that is passed to subclass with
- * @parse_frame function.
- * </para></listitem>
- * <listitem><para>Provide conversion functions</para></listitem>
- * <listitem><para>
- * Update the duration information with @gst_base_parse_set_duration
- * </para></listitem>
- * <listitem><para>
- * Optionally passthrough using @gst_base_parse_set_format
- * </para></listitem>
- * <listitem><para>
- * Configure various baseparse parameters using @gst_base_parse_set_seek and
- * @gst_base_parse_set_frame_props.
- * </para></listitem>
- * <listitem><para>
- * In particular, if subclass is unable to determine a duration, but
- * parsing (or specs) yields a frames per seconds rate, then this can be
- * provided to GstBaseParse to enable it to cater for
- * buffer time metadata (which will be taken from upstream as much as possible).
- * Internally keeping track of frame durations and respective
- * sizes that have been pushed provides GstBaseParse with an estimated bitrate.
- * A default @convert (used if not overriden) will then use these
- * rates to perform obvious conversions. These rates are also used to update
- * (estimated) duration at regular frame intervals.
- * </para></listitem>
- * </itemizedlist>
- *
- */
-
-/* TODO:
- * - In push mode provide a queue of adapter-"queued" buffers for upstream
- * buffer metadata
- * - Queue buffers/events until caps are set
- */
-
-#ifdef HAVE_CONFIG_H
-# include "config.h"
-#endif
-
-#include <stdlib.h>
-#include <string.h>
-
-#include "gstbaseparse.h"
-
-#define MIN_FRAMES_TO_POST_BITRATE 10
-#define TARGET_DIFFERENCE (20 * GST_SECOND)
-
-GST_DEBUG_CATEGORY_STATIC (gst_base_parse_debug);
-#define GST_CAT_DEFAULT gst_base_parse_debug
-
-/* Supported formats */
-static GstFormat fmtlist[] = {
- GST_FORMAT_DEFAULT,
- GST_FORMAT_BYTES,
- GST_FORMAT_TIME,
- 0
-};
-
-#define GST_BASE_PARSE_GET_PRIVATE(obj) \
- (G_TYPE_INSTANCE_GET_PRIVATE ((obj), GST_TYPE_BASE_PARSE, GstBaseParsePrivate))
-
-struct _GstBaseParsePrivate
-{
- GstActivateMode pad_mode;
-
- gint64 duration;
- GstFormat duration_fmt;
- gint64 estimated_duration;
-
- guint min_frame_size;
- guint format;
- guint fps_num, fps_den;
- gint update_interval;
- guint bitrate;
- guint lead_in, lead_out;
- GstClockTime lead_in_ts, lead_out_ts;
- GstBaseParseSeekable seekable;
-
- gboolean discont;
- gboolean flushing;
- gboolean drain;
-
- gint64 offset;
- gint64 sync_offset;
- GstClockTime next_ts;
- GstClockTime prev_ts;
- GstClockTime frame_duration;
- gboolean seen_keyframe;
- gboolean is_video;
-
- guint64 framecount;
- guint64 bytecount;
- guint64 data_bytecount;
- guint64 acc_duration;
- GstClockTime first_frame_ts;
- gint64 first_frame_offset;
-
- gboolean post_min_bitrate;
- gboolean post_avg_bitrate;
- gboolean post_max_bitrate;
- guint min_bitrate;
- guint avg_bitrate;
- guint max_bitrate;
- guint posted_avg_bitrate;
-
- GList *pending_events;
-
- GstBuffer *cache;
-
- /* index entry storage, either ours or provided */
- GstIndex *index;
- gint index_id;
- gboolean own_index;
- /* seek table entries only maintained if upstream is BYTE seekable */
- gboolean upstream_seekable;
- gboolean upstream_has_duration;
- gint64 upstream_size;
- /* minimum distance between two index entries */
- GstClockTimeDiff idx_interval;
- /* ts and offset of last entry added */
- GstClockTime index_last_ts;
- gint64 index_last_offset;
- gboolean index_last_valid;
-
- /* timestamps currently produced are accurate, e.g. started from 0 onwards */
- gboolean exact_position;
- /* seek events are temporarily kept to match them with newsegments */
- GSList *pending_seeks;
-
- /* reverse playback */
- GSList *buffers_pending;
- GSList *buffers_queued;
- GSList *buffers_send;
- GstClockTime last_ts;
- gint64 last_offset;
-};
-
-typedef struct _GstBaseParseSeek
-{
- GstSegment segment;
- gboolean accurate;
- gint64 offset;
- GstClockTime start_ts;
-} GstBaseParseSeek;
-
-#define GST_BASE_PARSE_PASSTHROUGH(parse) \
- (parse->priv->format & GST_BASE_PARSE_FORMAT_PASSTHROUGH)
-#define GST_BASE_PARSE_HAS_TIME(parse) \
- (parse->priv->format & GST_BASE_PARSE_FORMAT_HAS_TIME)
-
-
-static GstElementClass *parent_class = NULL;
-
-static void gst_base_parse_class_init (GstBaseParseClass * klass);
-static void gst_base_parse_init (GstBaseParse * parse,
- GstBaseParseClass * klass);
-
-GType
-gst_base_parse_get_type (void)
-{
- static GType base_parse_type = 0;
-
- if (!base_parse_type) {
- static const GTypeInfo base_parse_info = {
- sizeof (GstBaseParseClass),
- (GBaseInitFunc) NULL,
- (GBaseFinalizeFunc) NULL,
- (GClassInitFunc) gst_base_parse_class_init,
- NULL,
- NULL,
- sizeof (GstBaseParse),
- 0,
- (GInstanceInitFunc) gst_base_parse_init,
- };
-
- base_parse_type = g_type_register_static (GST_TYPE_ELEMENT,
- "GstBaseParseBad", &base_parse_info, G_TYPE_FLAG_ABSTRACT);
- }
- return base_parse_type;
-}
-
-static void gst_base_parse_finalize (GObject * object);
-
-static GstStateChangeReturn gst_base_parse_change_state (GstElement * element,
- GstStateChange transition);
-static void gst_base_parse_reset (GstBaseParse * parse);
-
-static void gst_base_parse_set_index (GstElement * element, GstIndex * index);
-static GstIndex *gst_base_parse_get_index (GstElement * element);
-
-static gboolean gst_base_parse_sink_activate (GstPad * sinkpad);
-static gboolean gst_base_parse_sink_activate_push (GstPad * pad,
- gboolean active);
-static gboolean gst_base_parse_sink_activate_pull (GstPad * pad,
- gboolean active);
-static gboolean gst_base_parse_handle_seek (GstBaseParse * parse,
- GstEvent * event);
-static void gst_base_parse_handle_tag (GstBaseParse * parse, GstEvent * event);
-
-static gboolean gst_base_parse_src_event (GstPad * pad, GstEvent * event);
-static gboolean gst_base_parse_sink_event (GstPad * pad, GstEvent * event);
-static gboolean gst_base_parse_query (GstPad * pad, GstQuery * query);
-static gboolean gst_base_parse_sink_setcaps (GstPad * pad, GstCaps * caps);
-static const GstQueryType *gst_base_parse_get_querytypes (GstPad * pad);
-
-static GstFlowReturn gst_base_parse_chain (GstPad * pad, GstBuffer * buffer);
-static void gst_base_parse_loop (GstPad * pad);
-
-static gboolean gst_base_parse_check_frame (GstBaseParse * parse,
- GstBaseParseFrame * frame, guint * framesize, gint * skipsize);
-static GstFlowReturn gst_base_parse_parse_frame (GstBaseParse * parse,
- GstBaseParseFrame * frame);
-
-static gboolean gst_base_parse_sink_eventfunc (GstBaseParse * parse,
- GstEvent * event);
-
-static gboolean gst_base_parse_src_eventfunc (GstBaseParse * parse,
- GstEvent * event);
-
-static void gst_base_parse_drain (GstBaseParse * parse);
-
-static void gst_base_parse_post_bitrates (GstBaseParse * parse,
- gboolean post_min, gboolean post_avg, gboolean post_max);
-
-static gint64 gst_base_parse_find_offset (GstBaseParse * parse,
- GstClockTime time, gboolean before, GstClockTime * _ts);
-static GstFlowReturn gst_base_parse_locate_time (GstBaseParse * parse,
- GstClockTime * _time, gint64 * _offset);
-
-static GstFlowReturn gst_base_parse_process_fragment (GstBaseParse * parse,
- gboolean push_only);
-
-static void
-gst_base_parse_clear_queues (GstBaseParse * parse)
-{
- g_slist_foreach (parse->priv->buffers_queued, (GFunc) gst_buffer_unref, NULL);
- g_slist_free (parse->priv->buffers_queued);
- parse->priv->buffers_queued = NULL;
- g_slist_foreach (parse->priv->buffers_pending, (GFunc) gst_buffer_unref,
- NULL);
- g_slist_free (parse->priv->buffers_pending);
- parse->priv->buffers_pending = NULL;
- g_slist_foreach (parse->priv->buffers_send, (GFunc) gst_buffer_unref, NULL);
- g_slist_free (parse->priv->buffers_send);
- parse->priv->buffers_send = NULL;
-}
-
-static void
-gst_base_parse_finalize (GObject * object)
-{
- GstBaseParse *parse = GST_BASE_PARSE (object);
- GstEvent **p_ev;
-
- g_object_unref (parse->adapter);
-
- if (parse->pending_segment) {
- p_ev = &parse->pending_segment;
- gst_event_replace (p_ev, NULL);
- }
- if (parse->close_segment) {
- p_ev = &parse->close_segment;
- gst_event_replace (p_ev, NULL);
- }
-
- if (parse->priv->cache) {
- gst_buffer_unref (parse->priv->cache);
- parse->priv->cache = NULL;
- }
-
- g_list_foreach (parse->priv->pending_events, (GFunc) gst_mini_object_unref,
- NULL);
- g_list_free (parse->priv->pending_events);
- parse->priv->pending_events = NULL;
-
- if (parse->priv->index) {
- gst_object_unref (parse->priv->index);
- parse->priv->index = NULL;
- }
-
- gst_base_parse_clear_queues (parse);
-
- G_OBJECT_CLASS (parent_class)->finalize (object);
-}
-
-static void
-gst_base_parse_class_init (GstBaseParseClass * klass)
-{
- GObjectClass *gobject_class;
- GstElementClass *gstelement_class;
-
- gobject_class = G_OBJECT_CLASS (klass);
- g_type_class_add_private (klass, sizeof (GstBaseParsePrivate));
- parent_class = g_type_class_peek_parent (klass);
- gobject_class->finalize = GST_DEBUG_FUNCPTR (gst_base_parse_finalize);
-
- gstelement_class = (GstElementClass *) klass;
- gstelement_class->change_state =
- GST_DEBUG_FUNCPTR (gst_base_parse_change_state);
- gstelement_class->set_index = GST_DEBUG_FUNCPTR (gst_base_parse_set_index);
- gstelement_class->get_index = GST_DEBUG_FUNCPTR (gst_base_parse_get_index);
-
- /* Default handlers */
- klass->check_valid_frame = gst_base_parse_check_frame;
- klass->parse_frame = gst_base_parse_parse_frame;
- klass->src_event = gst_base_parse_src_eventfunc;
- klass->convert = gst_base_parse_convert_default;
-
- GST_DEBUG_CATEGORY_INIT (gst_base_parse_debug, "baseparse", 0,
- "baseparse element");
-}
-
-static void
-gst_base_parse_init (GstBaseParse * parse, GstBaseParseClass * bclass)
-{
- GstPadTemplate *pad_template;
-
- GST_DEBUG_OBJECT (parse, "gst_base_parse_init");
-
- parse->priv = GST_BASE_PARSE_GET_PRIVATE (parse);
-
- pad_template =
- gst_element_class_get_pad_template (GST_ELEMENT_CLASS (bclass), "sink");
- g_return_if_fail (pad_template != NULL);
- parse->sinkpad = gst_pad_new_from_template (pad_template, "sink");
- gst_pad_set_event_function (parse->sinkpad,
- GST_DEBUG_FUNCPTR (gst_base_parse_sink_event));
- gst_pad_set_setcaps_function (parse->sinkpad,
- GST_DEBUG_FUNCPTR (gst_base_parse_sink_setcaps));
- gst_pad_set_chain_function (parse->sinkpad,
- GST_DEBUG_FUNCPTR (gst_base_parse_chain));
- gst_pad_set_activate_function (parse->sinkpad,
- GST_DEBUG_FUNCPTR (gst_base_parse_sink_activate));
- gst_pad_set_activatepush_function (parse->sinkpad,
- GST_DEBUG_FUNCPTR (gst_base_parse_sink_activate_push));
- gst_pad_set_activatepull_function (parse->sinkpad,
- GST_DEBUG_FUNCPTR (gst_base_parse_sink_activate_pull));
- gst_element_add_pad (GST_ELEMENT (parse), parse->sinkpad);
-
- GST_DEBUG_OBJECT (parse, "sinkpad created");
-
- pad_template =
- gst_element_class_get_pad_template (GST_ELEMENT_CLASS (bclass), "src");
- g_return_if_fail (pad_template != NULL);
- parse->srcpad = gst_pad_new_from_template (pad_template, "src");
- gst_pad_set_event_function (parse->srcpad,
- GST_DEBUG_FUNCPTR (gst_base_parse_src_event));
- gst_pad_set_query_type_function (parse->srcpad,
- GST_DEBUG_FUNCPTR (gst_base_parse_get_querytypes));
- gst_pad_set_query_function (parse->srcpad,
- GST_DEBUG_FUNCPTR (gst_base_parse_query));
- gst_pad_use_fixed_caps (parse->srcpad);
- gst_element_add_pad (GST_ELEMENT (parse), parse->srcpad);
- GST_DEBUG_OBJECT (parse, "src created");
-
- parse->adapter = gst_adapter_new ();
-
- parse->priv->pad_mode = GST_ACTIVATE_NONE;
-
- /* init state */
- gst_base_parse_reset (parse);
- GST_DEBUG_OBJECT (parse, "init ok");
-}
-
-/**
- * gst_base_parse_frame_init:
- * @parse: #GstBaseParse.
- * @fmt: #GstBaseParseFrame.
- *
- * Sets a #GstBaseParseFrame to initial state. Currently this means
- * all fields are zero-ed.
- */
-void
-gst_base_parse_frame_init (GstBaseParse * parse, GstBaseParseFrame * frame)
-{
- memset (frame, 0, sizeof (*frame));
-}
-
-/* clear == frame no longer to be used following this */
-static void
-gst_base_parse_frame_clear (GstBaseParse * parse, GstBaseParseFrame * frame)
-{
- /* limited for now */
- if (frame->buffer) {
- gst_buffer_unref (frame->buffer);
- frame->buffer = NULL;
- }
-}
-
-static inline void
-gst_base_parse_frame_update (GstBaseParse * parse, GstBaseParseFrame * frame,
- GstBuffer * buf)
-{
- gst_buffer_replace (&frame->buffer, buf);
- if (parse->priv->drain) {
- frame->flags |= GST_BASE_PARSE_FRAME_FLAG_DRAIN;
- } else {
- frame->flags &= ~(GST_BASE_PARSE_FRAME_FLAG_DRAIN);
- }
- /* losing sync is pretty much a discont (and vice versa), no ? */
- if (!parse->priv->discont) {
- frame->flags |= GST_BASE_PARSE_FRAME_FLAG_SYNC;
- } else {
- frame->flags &= ~(GST_BASE_PARSE_FRAME_FLAG_SYNC);
- }
-}
-
-static void
-gst_base_parse_reset (GstBaseParse * parse)
-{
- GST_OBJECT_LOCK (parse);
- gst_segment_init (&parse->segment, GST_FORMAT_TIME);
- parse->priv->duration = -1;
- parse->priv->min_frame_size = 1;
- parse->priv->discont = TRUE;
- parse->priv->flushing = FALSE;
- parse->priv->offset = 0;
- parse->priv->sync_offset = 0;
- parse->priv->update_interval = -1;
- parse->priv->fps_num = parse->priv->fps_den = 0;
- parse->priv->frame_duration = GST_CLOCK_TIME_NONE;
- parse->priv->lead_in = parse->priv->lead_out = 0;
- parse->priv->lead_in_ts = parse->priv->lead_out_ts = 0;
- parse->priv->seekable = GST_BASE_PARSE_SEEK_DEFAULT;
- parse->priv->bitrate = 0;
- parse->priv->framecount = 0;
- parse->priv->bytecount = 0;
- parse->priv->acc_duration = 0;
- parse->priv->first_frame_ts = GST_CLOCK_TIME_NONE;
- parse->priv->first_frame_offset = -1;
- parse->priv->estimated_duration = -1;
- parse->priv->next_ts = 0;
- parse->priv->format = 0;
- parse->priv->post_min_bitrate = TRUE;
- parse->priv->post_avg_bitrate = TRUE;
- parse->priv->post_max_bitrate = TRUE;
- parse->priv->min_bitrate = G_MAXUINT;
- parse->priv->max_bitrate = 0;
- parse->priv->avg_bitrate = 0;
- parse->priv->posted_avg_bitrate = 0;
-
- parse->priv->index_last_ts = GST_CLOCK_TIME_NONE;
- parse->priv->index_last_offset = -1;
- parse->priv->index_last_valid = TRUE;
- parse->priv->upstream_seekable = FALSE;
- parse->priv->upstream_size = 0;
- parse->priv->upstream_has_duration = FALSE;
- parse->priv->idx_interval = 0;
- parse->priv->exact_position = TRUE;
- parse->priv->seen_keyframe = FALSE;
-
- parse->priv->last_ts = GST_CLOCK_TIME_NONE;
- parse->priv->last_offset = 0;
-
- if (parse->pending_segment) {
- gst_event_unref (parse->pending_segment);
- parse->pending_segment = NULL;
- }
-
- g_list_foreach (parse->priv->pending_events, (GFunc) gst_mini_object_unref,
- NULL);
- g_list_free (parse->priv->pending_events);
- parse->priv->pending_events = NULL;
-
- if (parse->priv->cache) {
- gst_buffer_unref (parse->priv->cache);
- parse->priv->cache = NULL;
- }
-
- g_slist_foreach (parse->priv->pending_seeks, (GFunc) g_free, NULL);
- g_slist_free (parse->priv->pending_seeks);
- parse->priv->pending_seeks = NULL;
-
- GST_OBJECT_UNLOCK (parse);
-}
-
-/**
- * gst_base_parse_check_frame:
- * @parse: #GstBaseParse.
- * @buffer: GstBuffer.
- * @framesize: This will be set to tell the found frame size in bytes.
- * @skipsize: Output parameter that tells how much data needs to be skipped
- * in order to find the following frame header.
- *
- * Default callback for check_valid_frame.
- *
- * Returns: Always TRUE.
- */
-static gboolean
-gst_base_parse_check_frame (GstBaseParse * parse,
- GstBaseParseFrame * frame, guint * framesize, gint * skipsize)
-{
- *framesize = GST_BUFFER_SIZE (frame->buffer);
- *skipsize = 0;
- return TRUE;
-}
-
-
-/**
- * gst_base_parse_parse_frame:
- * @parse: #GstBaseParse.
- * @buffer: #GstBuffer.
- *
- * Default callback for parse_frame.
- */
-static GstFlowReturn
-gst_base_parse_parse_frame (GstBaseParse * parse, GstBaseParseFrame * frame)
-{
- GstBuffer *buffer = frame->buffer;
-
- if (!GST_BUFFER_TIMESTAMP_IS_VALID (buffer) &&
- GST_CLOCK_TIME_IS_VALID (parse->priv->next_ts)) {
- GST_BUFFER_TIMESTAMP (buffer) = parse->priv->next_ts;
- }
- if (!GST_BUFFER_DURATION_IS_VALID (buffer) &&
- GST_CLOCK_TIME_IS_VALID (parse->priv->frame_duration)) {
- GST_BUFFER_DURATION (buffer) = parse->priv->frame_duration;
- }
- return GST_FLOW_OK;
-}
-
-/**
- * gst_base_parse_convert:
- * @parse: #GstBaseParse.
- * @src_format: #GstFormat describing the source format.
- * @src_value: Source value to be converted.
- * @dest_format: #GstFormat defining the converted format.
- * @dest_value: Pointer where the conversion result will be put.
- *
- * Converts using configured "convert" vmethod in #GstBaseParse class.
- *
- * Returns: TRUE if conversion was successful.
- */
-static gboolean
-gst_base_parse_convert (GstBaseParse * parse,
- GstFormat src_format,
- gint64 src_value, GstFormat dest_format, gint64 * dest_value)
-{
- GstBaseParseClass *klass = GST_BASE_PARSE_GET_CLASS (parse);
- gboolean ret;
-
- g_return_val_if_fail (dest_value != NULL, FALSE);
-
- if (!klass->convert)
- return FALSE;
-
- ret = klass->convert (parse, src_format, src_value, dest_format, dest_value);
-
-#ifndef GST_DISABLE_GST_DEBUG
- {
- if (ret) {
- if (src_format == GST_FORMAT_TIME && dest_format == GST_FORMAT_BYTES) {
- GST_LOG_OBJECT (parse,
- "TIME -> BYTES: %" GST_TIME_FORMAT " -> %" G_GINT64_FORMAT,
- GST_TIME_ARGS (src_value), *dest_value);
- } else if (dest_format == GST_FORMAT_TIME &&
- src_format == GST_FORMAT_BYTES) {
- GST_LOG_OBJECT (parse,
- "BYTES -> TIME: %" G_GINT64_FORMAT " -> %" GST_TIME_FORMAT,
- src_value, GST_TIME_ARGS (*dest_value));
- } else {
- GST_LOG_OBJECT (parse,
- "%s -> %s: %" G_GINT64_FORMAT " -> %" G_GINT64_FORMAT,
- GST_STR_NULL (gst_format_get_name (src_format)),
- GST_STR_NULL (gst_format_get_name (dest_format)),
- src_value, *dest_value);
- }
- } else {
- GST_DEBUG_OBJECT (parse, "conversion failed");
- }
- }
-#endif
-
- return ret;
-}
-
-/**
- * gst_base_parse_sink_event:
- * @pad: #GstPad that received the event.
- * @event: #GstEvent to be handled.
- *
- * Handler for sink pad events.
- *
- * Returns: TRUE if the event was handled.
- */
-static gboolean
-gst_base_parse_sink_event (GstPad * pad, GstEvent * event)
-{
- GstBaseParse *parse;
- GstBaseParseClass *bclass;
- gboolean handled = FALSE;
- gboolean ret = TRUE;
-
- parse = GST_BASE_PARSE (gst_pad_get_parent (pad));
- bclass = GST_BASE_PARSE_GET_CLASS (parse);
-
- GST_DEBUG_OBJECT (parse, "handling event %d, %s", GST_EVENT_TYPE (event),
- GST_EVENT_TYPE_NAME (event));
-
- /* Cache all events except EOS, NEWSEGMENT and FLUSH_STOP if we have a
- * pending segment */
- if (parse->pending_segment && GST_EVENT_TYPE (event) != GST_EVENT_EOS
- && GST_EVENT_TYPE (event) != GST_EVENT_NEWSEGMENT
- && GST_EVENT_TYPE (event) != GST_EVENT_FLUSH_START
- && GST_EVENT_TYPE (event) != GST_EVENT_FLUSH_STOP) {
-
- if (GST_EVENT_TYPE (event) == GST_EVENT_TAG)
- /* See if any bitrate tags were posted */
- gst_base_parse_handle_tag (parse, event);
-
- parse->priv->pending_events =
- g_list_append (parse->priv->pending_events, event);
- ret = TRUE;
- } else {
-
- if (GST_EVENT_TYPE (event) == GST_EVENT_EOS &&
- parse->priv->framecount < MIN_FRAMES_TO_POST_BITRATE)
- /* We've not posted bitrate tags yet - do so now */
- gst_base_parse_post_bitrates (parse, TRUE, TRUE, TRUE);
-
- if (bclass->event)
- handled = bclass->event (parse, event);
-
- if (!handled)
- handled = gst_base_parse_sink_eventfunc (parse, event);
-
- if (!handled)
- ret = gst_pad_event_default (pad, event);
- }
-
- gst_object_unref (parse);
- GST_DEBUG_OBJECT (parse, "event handled");
- return ret;
-}
-
-
-/**
- * gst_base_parse_sink_eventfunc:
- * @parse: #GstBaseParse.
- * @event: #GstEvent to be handled.
- *
- * Element-level event handler function.
- *
- * The event will be unreffed only if it has been handled and this
- * function returns %TRUE
- *
- * Returns: %TRUE if the event was handled and not need forwarding.
- */
-static gboolean
-gst_base_parse_sink_eventfunc (GstBaseParse * parse, GstEvent * event)
-{
- gboolean handled = FALSE;
- GstEvent **eventp;
-
- switch (GST_EVENT_TYPE (event)) {
- case GST_EVENT_NEWSEGMENT:
- {
- gdouble rate, applied_rate;
- GstFormat format;
- gint64 start, stop, pos, next_ts, offset = 0;
- gboolean update;
-
- gst_event_parse_new_segment_full (event, &update, &rate, &applied_rate,
- &format, &start, &stop, &pos);
-
- GST_DEBUG_OBJECT (parse, "newseg rate %g, applied rate %g, "
- "format %d, start = %" GST_TIME_FORMAT ", stop = %" GST_TIME_FORMAT
- ", pos = %" GST_TIME_FORMAT, rate, applied_rate, format,
- GST_TIME_ARGS (start), GST_TIME_ARGS (stop), GST_TIME_ARGS (pos));
-
- if (format == GST_FORMAT_BYTES) {
- GstClockTime seg_start, seg_stop;
- GstBaseParseSeek *seek = NULL;
- GSList *node;
-
- /* stop time is allowed to be open-ended, but not start & pos */
- seg_stop = GST_CLOCK_TIME_NONE;
- seg_start = 0;
- offset = pos;
-
- GST_OBJECT_LOCK (parse);
- for (node = parse->priv->pending_seeks; node; node = node->next) {
- GstBaseParseSeek *tmp = node->data;
-
- if (tmp->offset == pos) {
- seek = tmp;
- break;
- }
- }
- parse->priv->pending_seeks =
- g_slist_remove (parse->priv->pending_seeks, seek);
- GST_OBJECT_UNLOCK (parse);
-
- if (seek) {
- GST_DEBUG_OBJECT (parse,
- "Matched newsegment to%s seek: %" GST_SEGMENT_FORMAT,
- seek->accurate ? " accurate" : "", &seek->segment);
- seg_start = seek->segment.start;
- seg_stop = seek->segment.stop;
- next_ts = seek->start_ts;
- parse->priv->exact_position = seek->accurate;
- g_free (seek);
- } else {
- /* best attempt convert */
- /* as these are only estimates, stop is kept open-ended to avoid
- * premature cutting */
- gst_base_parse_convert (parse, GST_FORMAT_BYTES, start,
- GST_FORMAT_TIME, (gint64 *) & seg_start);
- parse->priv->exact_position = (start == 0);
- next_ts = seg_start;
- }
-
- gst_event_unref (event);
- event = gst_event_new_new_segment_full (update, rate, applied_rate,
- GST_FORMAT_TIME, seg_start, seg_stop, seg_start);
- format = GST_FORMAT_TIME;
- start = seg_start;
- stop = seg_stop;
- GST_DEBUG_OBJECT (parse, "Converted incoming segment to TIME. "
- "start = %" GST_TIME_FORMAT ", stop = %" GST_TIME_FORMAT,
- GST_TIME_ARGS (seg_start), GST_TIME_ARGS (seg_stop));
- } else if (format != GST_FORMAT_TIME) {
- /* Unknown incoming segment format. Output a default open-ended
- * TIME segment */
- gst_event_unref (event);
- event = gst_event_new_new_segment_full (update, rate, applied_rate,
- GST_FORMAT_TIME, 0, GST_CLOCK_TIME_NONE, 0);
- format = GST_FORMAT_TIME;
- next_ts = start = 0;
- stop = GST_CLOCK_TIME_NONE;
- } else {
- /* not considered BYTE seekable if it is talking to us in TIME,
- * whatever else it might claim */
- parse->priv->upstream_seekable = FALSE;
- next_ts = start;
- }
-
- gst_segment_set_newsegment_full (&parse->segment, update, rate,
- applied_rate, format, start, stop, start);
-
- /* save the segment for later, right before we push a new buffer so that
- * the caps are fixed and the next linked element can receive
- * the segment. */
- eventp = &parse->pending_segment;
- gst_event_replace (eventp, event);
- gst_event_unref (event);
- handled = TRUE;
-
- /* but finish the current segment */
- GST_DEBUG_OBJECT (parse, "draining current segment");
- if (parse->segment.rate > 0.0)
- gst_base_parse_drain (parse);
- else
- gst_base_parse_process_fragment (parse, FALSE);
- gst_adapter_clear (parse->adapter);
- parse->priv->offset = offset;
- parse->priv->sync_offset = offset;
- parse->priv->next_ts = next_ts;
- parse->priv->last_ts = GST_CLOCK_TIME_NONE;
- parse->priv->discont = TRUE;
- parse->priv->seen_keyframe = FALSE;
- break;
- }
-
- case GST_EVENT_FLUSH_START:
- parse->priv->flushing = TRUE;
- handled = gst_pad_push_event (parse->srcpad, gst_event_ref (event));
- if (handled)
- gst_event_unref (event);
- /* Wait for _chain() to exit by taking the srcpad STREAM_LOCK */
- GST_PAD_STREAM_LOCK (parse->srcpad);
- GST_PAD_STREAM_UNLOCK (parse->srcpad);
-
- break;
-
- case GST_EVENT_FLUSH_STOP:
- gst_adapter_clear (parse->adapter);
- gst_base_parse_clear_queues (parse);
- parse->priv->flushing = FALSE;
- parse->priv->discont = TRUE;
- parse->priv->last_ts = GST_CLOCK_TIME_NONE;
- break;
-
- case GST_EVENT_EOS:
- if (parse->segment.rate > 0.0)
- gst_base_parse_drain (parse);
- else
- gst_base_parse_process_fragment (parse, FALSE);
-
- /* If we STILL have zero frames processed, fire an error */
- if (parse->priv->framecount == 0) {
- GST_ELEMENT_ERROR (parse, STREAM, WRONG_TYPE,
- ("No valid frames found before end of stream"), (NULL));
- }
- /* newsegment before eos */
- if (parse->pending_segment) {
- gst_pad_push_event (parse->srcpad, parse->pending_segment);
- parse->pending_segment = NULL;
- }
- break;
-
- default:
- break;
- }
-
- return handled;
-}
-
-
-/**
- * gst_base_parse_src_event:
- * @pad: #GstPad that received the event.
- * @event: #GstEvent that was received.
- *
- * Handler for source pad events.
- *
- * Returns: TRUE if the event was handled.
- */
-static gboolean
-gst_base_parse_src_event (GstPad * pad, GstEvent * event)
-{
- GstBaseParse *parse;
- GstBaseParseClass *bclass;
- gboolean handled = FALSE;
- gboolean ret = TRUE;
-
- parse = GST_BASE_PARSE (gst_pad_get_parent (pad));
- bclass = GST_BASE_PARSE_GET_CLASS (parse);
-
- GST_DEBUG_OBJECT (parse, "event %d, %s", GST_EVENT_TYPE (event),
- GST_EVENT_TYPE_NAME (event));
-
- if (bclass->src_event)
- handled = bclass->src_event (parse, event);
-
- if (!handled)
- ret = gst_pad_event_default (pad, event);
-
- gst_object_unref (parse);
- return ret;
-}
-
-
-/**
- * gst_base_parse_src_eventfunc:
- * @parse: #GstBaseParse.
- * @event: #GstEvent that was received.
- *
- * Default srcpad event handler.
- *
- * Returns: TRUE if the event was handled and can be dropped.
- */
-static gboolean
-gst_base_parse_src_eventfunc (GstBaseParse * parse, GstEvent * event)
-{
- gboolean handled = FALSE;
-
- switch (GST_EVENT_TYPE (event)) {
- case GST_EVENT_SEEK:
- {
- if (parse->priv->seekable > GST_BASE_PARSE_SEEK_NONE) {
- handled = gst_base_parse_handle_seek (parse, event);
- }
- break;
- }
- default:
- break;
- }
- return handled;
-}
-
-
-/**
- * gst_base_parse_convert_default:
- * @parse: #GstBaseParse.
- * @src_format: #GstFormat describing the source format.
- * @src_value: Source value to be converted.
- * @dest_format: #GstFormat defining the converted format.
- * @dest_value: Pointer where the conversion result will be put.
- *
- * Default implementation of "convert" vmethod in #GstBaseParse class.
- *
- * Returns: TRUE if conversion was successful.
- */
-gboolean
-gst_base_parse_convert_default (GstBaseParse * parse,
- GstFormat src_format,
- gint64 src_value, GstFormat dest_format, gint64 * dest_value)
-{
- gboolean ret = FALSE;
- guint64 bytes, duration;
-
- if (G_UNLIKELY (src_format == dest_format)) {
- *dest_value = src_value;
- return TRUE;
- }
-
- if (G_UNLIKELY (src_value == -1)) {
- *dest_value = -1;
- return TRUE;
- }
-
- if (G_UNLIKELY (src_value == 0)) {
- *dest_value = 0;
- return TRUE;
- }
-
- /* need at least some frames */
- if (!parse->priv->framecount)
- return FALSE;
-
- duration = parse->priv->acc_duration / GST_MSECOND;
- bytes = parse->priv->bytecount;
-
- if (G_UNLIKELY (!duration || !bytes))
- return FALSE;
-
- if (src_format == GST_FORMAT_BYTES) {
- if (dest_format == GST_FORMAT_TIME) {
- /* BYTES -> TIME conversion */
- GST_DEBUG_OBJECT (parse, "converting bytes -> time");
- *dest_value = gst_util_uint64_scale (src_value, duration, bytes);
- *dest_value *= GST_MSECOND;
- GST_DEBUG_OBJECT (parse, "conversion result: %" G_GINT64_FORMAT " ms",
- *dest_value / GST_MSECOND);
- ret = TRUE;
- }
- } else if (src_format == GST_FORMAT_TIME) {
- if (dest_format == GST_FORMAT_BYTES) {
- GST_DEBUG_OBJECT (parse, "converting time -> bytes");
- *dest_value = gst_util_uint64_scale (src_value / GST_MSECOND, bytes,
- duration);
- GST_DEBUG_OBJECT (parse,
- "time %" G_GINT64_FORMAT " ms in bytes = %" G_GINT64_FORMAT,
- src_value / GST_MSECOND, *dest_value);
- ret = TRUE;
- }
- } else if (src_format == GST_FORMAT_DEFAULT) {
- /* DEFAULT == frame-based */
- if (dest_format == GST_FORMAT_TIME) {
- if (parse->priv->fps_den) {
- *dest_value = gst_util_uint64_scale (src_value,
- GST_SECOND * parse->priv->fps_den, parse->priv->fps_num);
- ret = TRUE;
- }
- } else if (dest_format == GST_FORMAT_BYTES) {
- }
- }
-
- return ret;
-}
-
-/**
- * gst_base_parse_update_duration:
- * @parse: #GstBaseParse.
- *
- */
-static void
-gst_base_parse_update_duration (GstBaseParse * aacparse)
-{
- GstPad *peer;
- GstBaseParse *parse;
-
- parse = GST_BASE_PARSE (aacparse);
-
- peer = gst_pad_get_peer (parse->sinkpad);
- if (peer) {
- GstFormat pformat = GST_FORMAT_BYTES;
- gboolean qres = FALSE;
- gint64 ptot, dest_value;
-
- qres = gst_pad_query_duration (peer, &pformat, &ptot);
- gst_object_unref (GST_OBJECT (peer));
- if (qres) {
- if (gst_base_parse_convert (parse, pformat, ptot,
- GST_FORMAT_TIME, &dest_value)) {
- parse->priv->estimated_duration = dest_value;
- GST_LOG_OBJECT (parse,
- "updated estimated duration to %" GST_TIME_FORMAT,
- GST_TIME_ARGS (dest_value));
- }
- }
- }
-}
-
-static void
-gst_base_parse_post_bitrates (GstBaseParse * parse, gboolean post_min,
- gboolean post_avg, gboolean post_max)
-{
- GstTagList *taglist = gst_tag_list_new ();
-
- if (post_min && parse->priv->post_min_bitrate)
- gst_tag_list_add (taglist, GST_TAG_MERGE_REPLACE,
- GST_TAG_MINIMUM_BITRATE, parse->priv->min_bitrate, NULL);
-
- if (post_avg && parse->priv->post_avg_bitrate) {
- parse->priv->posted_avg_bitrate = parse->priv->avg_bitrate;
- gst_tag_list_add (taglist, GST_TAG_MERGE_REPLACE, GST_TAG_BITRATE,
- parse->priv->avg_bitrate, NULL);
- }
-
- if (post_max && parse->priv->post_max_bitrate)
- gst_tag_list_add (taglist, GST_TAG_MERGE_REPLACE,
- GST_TAG_MAXIMUM_BITRATE, parse->priv->max_bitrate, NULL);
-
- GST_DEBUG_OBJECT (parse, "Updated bitrates. Min: %u, Avg: %u, Max: %u",
- parse->priv->min_bitrate, parse->priv->avg_bitrate,
- parse->priv->max_bitrate);
-
- gst_element_found_tags_for_pad (GST_ELEMENT (parse), parse->srcpad, taglist);
-}
-
-/**
- * gst_base_parse_update_bitrates:
- * @parse: #GstBaseParse.
- * @buffer: Current frame as a #GstBuffer
- *
- * Keeps track of the minimum and maximum bitrates, and also maintains a
- * running average bitrate of the stream so far.
- */
-static void
-gst_base_parse_update_bitrates (GstBaseParse * parse, GstBaseParseFrame * frame)
-{
- /* Only update the tag on a 10 kbps delta */
- static const gint update_threshold = 10000;
-
- GstBaseParseClass *klass;
- guint64 data_len, frame_dur;
- gint overhead, frame_bitrate, old_avg_bitrate;
- gboolean update_min = FALSE, update_avg = FALSE, update_max = FALSE;
- GstBuffer *buffer = frame->buffer;
-
- klass = GST_BASE_PARSE_GET_CLASS (parse);
-
- overhead = frame->overhead;
- if (overhead == -1)
- return;
-
- data_len = GST_BUFFER_SIZE (buffer) - overhead;
- parse->priv->data_bytecount += data_len;
-
- /* duration should be valid by now,
- * either set by subclass or maybe based on fps settings */
- if (GST_BUFFER_DURATION_IS_VALID (buffer) && parse->priv->acc_duration != 0) {
- /* Calculate duration of a frame from buffer properties */
- frame_dur = GST_BUFFER_DURATION (buffer);
- parse->priv->avg_bitrate = (8 * parse->priv->data_bytecount * GST_SECOND) /
- parse->priv->acc_duration;
-
- } else {
- /* No way to figure out frame duration (is this even possible?) */
- return;
- }
-
- /* override if subclass provided bitrate, e.g. metadata based */
- if (parse->priv->bitrate) {
- parse->priv->avg_bitrate = parse->priv->bitrate;
- /* spread this (confirmed) info ASAP */
- if (parse->priv->posted_avg_bitrate != parse->priv->avg_bitrate)
- gst_base_parse_post_bitrates (parse, FALSE, TRUE, FALSE);
- }
-
- if (frame_dur)
- frame_bitrate = (8 * data_len * GST_SECOND) / frame_dur;
- else
- return;
-
- GST_LOG_OBJECT (parse, "frame bitrate %u, avg bitrate %u", frame_bitrate,
- parse->priv->avg_bitrate);
-
- if (parse->priv->framecount < MIN_FRAMES_TO_POST_BITRATE) {
- goto exit;
- } else if (parse->priv->framecount == MIN_FRAMES_TO_POST_BITRATE) {
- /* always post all at threshold time */
- update_min = update_max = update_avg = TRUE;
- }
-
- if (G_LIKELY (parse->priv->framecount >= MIN_FRAMES_TO_POST_BITRATE)) {
- if (frame_bitrate < parse->priv->min_bitrate) {
- parse->priv->min_bitrate = frame_bitrate;
- update_min = TRUE;
- }
-
- if (frame_bitrate > parse->priv->max_bitrate) {
- parse->priv->max_bitrate = frame_bitrate;
- update_max = TRUE;
- }
-
- old_avg_bitrate = parse->priv->posted_avg_bitrate;
- if ((gint) (old_avg_bitrate - parse->priv->avg_bitrate) > update_threshold
- || (gint) (parse->priv->avg_bitrate - old_avg_bitrate) >
- update_threshold)
- update_avg = TRUE;
- }
-
- if ((update_min || update_avg || update_max))
- gst_base_parse_post_bitrates (parse, update_min, update_avg, update_max);
-
- /* If average bitrate changes that much and no valid (time) duration provided,
- * then post a new duration message so applications can update their cached
- * values */
- if (update_avg && !(parse->priv->duration_fmt == GST_FORMAT_TIME &&
- GST_CLOCK_TIME_IS_VALID (parse->priv->duration)))
- gst_element_post_message (GST_ELEMENT (parse),
- gst_message_new_duration (GST_OBJECT (parse), GST_FORMAT_TIME, -1));
-
-exit:
- return;
-}
-
-/**
- * gst_base_parse_add_index_entry:
- * @parse: #GstBaseParse.
- * @offset: offset of entry
- * @ts: timestamp associated with offset
- * @key: whether entry refers to keyframe
- * @force: add entry disregarding sanity checks
- *
- * Adds an entry to the index associating @offset to @ts. It is recommended
- * to only add keyframe entries. @force allows to bypass checks, such as
- * whether the stream is (upstream) seekable, another entry is already "close"
- * to the new entry, etc.
- *
- * Returns: #gboolean indicating whether entry was added
- */
-gboolean
-gst_base_parse_add_index_entry (GstBaseParse * parse, guint64 offset,
- GstClockTime ts, gboolean key, gboolean force)
-{
- gboolean ret = FALSE;
- GstIndexAssociation associations[2];
-
- GST_LOG_OBJECT (parse, "Adding key=%d index entry %" GST_TIME_FORMAT
- " @ offset 0x%08" G_GINT64_MODIFIER "x", key, GST_TIME_ARGS (ts), offset);
-
- if (G_LIKELY (!force)) {
-
- if (!parse->priv->upstream_seekable) {
- GST_DEBUG_OBJECT (parse, "upstream not seekable; discarding");
- goto exit;
- }
-
- /* FIXME need better helper data structure that handles these issues
- * related to ongoing collecting of index entries */
- if (parse->priv->index_last_offset >= (gint64) offset) {
- GST_DEBUG_OBJECT (parse, "already have entries up to offset "
- "0x%08" G_GINT64_MODIFIER "x", parse->priv->index_last_offset);
- goto exit;
- }
-
- if (GST_CLOCK_TIME_IS_VALID (parse->priv->index_last_ts) &&
- GST_CLOCK_DIFF (parse->priv->index_last_ts, ts) <
- parse->priv->idx_interval) {
- GST_DEBUG_OBJECT (parse, "entry too close to last time %" GST_TIME_FORMAT,
- GST_TIME_ARGS (parse->priv->index_last_ts));
- goto exit;
- }
-
- /* if last is not really the last one */
- if (!parse->priv->index_last_valid) {
- GstClockTime prev_ts;
-
- gst_base_parse_find_offset (parse, ts, TRUE, &prev_ts);
- if (GST_CLOCK_DIFF (prev_ts, ts) < parse->priv->idx_interval) {
- GST_DEBUG_OBJECT (parse,
- "entry too close to existing entry %" GST_TIME_FORMAT,
- GST_TIME_ARGS (prev_ts));
- parse->priv->index_last_offset = offset;
- parse->priv->index_last_ts = ts;
- goto exit;
- }
- }
- }
-
- associations[0].format = GST_FORMAT_TIME;
- associations[0].value = ts;
- associations[1].format = GST_FORMAT_BYTES;
- associations[1].value = offset;
-
- /* index might change on-the-fly, although that would be nutty app ... */
- GST_OBJECT_LOCK (parse);
- gst_index_add_associationv (parse->priv->index, parse->priv->index_id,
- (key) ? GST_ASSOCIATION_FLAG_KEY_UNIT : GST_ASSOCIATION_FLAG_DELTA_UNIT,
- 2, (const GstIndexAssociation *) &associations);
- GST_OBJECT_UNLOCK (parse);
-
- if (key) {
- parse->priv->index_last_offset = offset;
- parse->priv->index_last_ts = ts;
- }
-
- ret = TRUE;
-
-exit:
- return ret;
-}
-
-/* check for seekable upstream, above and beyond a mere query */
-static void
-gst_base_parse_check_seekability (GstBaseParse * parse)
-{
- GstQuery *query;
- gboolean seekable = FALSE;
- gint64 start = -1, stop = -1;
- guint idx_interval = 0;
-
- query = gst_query_new_seeking (GST_FORMAT_BYTES);
- if (!gst_pad_peer_query (parse->sinkpad, query)) {
- GST_DEBUG_OBJECT (parse, "seeking query failed");
- goto done;
- }
-
- gst_query_parse_seeking (query, NULL, &seekable, &start, &stop);
-
- /* try harder to query upstream size if we didn't get it the first time */
- if (seekable && stop == -1) {
- GstFormat fmt = GST_FORMAT_BYTES;
-
- GST_DEBUG_OBJECT (parse, "doing duration query to fix up unset stop");
- gst_pad_query_peer_duration (parse->sinkpad, &fmt, &stop);
- }
-
- /* if upstream doesn't know the size, it's likely that it's not seekable in
- * practice even if it technically may be seekable */
- if (seekable && (start != 0 || stop <= start)) {
- GST_DEBUG_OBJECT (parse, "seekable but unknown start/stop -> disable");
- seekable = FALSE;
- }
-
- /* let's not put every single frame into our index */
- if (seekable) {
- if (stop < 10 * 1024 * 1024)
- idx_interval = 100;
- else if (stop < 100 * 1024 * 1024)
- idx_interval = 500;
- else
- idx_interval = 1000;
- }
-
-done:
- gst_query_unref (query);
-
- GST_DEBUG_OBJECT (parse, "seekable: %d (%" G_GUINT64_FORMAT " - %"
- G_GUINT64_FORMAT ")", seekable, start, stop);
- parse->priv->upstream_seekable = seekable;
- parse->priv->upstream_size = seekable ? stop : 0;
-
- GST_DEBUG_OBJECT (parse, "idx_interval: %ums", idx_interval);
- parse->priv->idx_interval = idx_interval * GST_MSECOND;
-}
-
-/* some misc checks on upstream */
-static void
-gst_base_parse_check_upstream (GstBaseParse * parse)
-{
- GstFormat fmt = GST_FORMAT_TIME;
- gint64 stop;
-
- if (gst_pad_query_peer_duration (parse->sinkpad, &fmt, &stop))
- if (GST_CLOCK_TIME_IS_VALID (stop) && stop) {
- /* upstream has one, accept it also, and no further updates */
- gst_base_parse_set_duration (parse, GST_FORMAT_TIME, stop, 0);
- parse->priv->upstream_has_duration = TRUE;
- }
-
- GST_DEBUG_OBJECT (parse, "upstream_has_duration: %d",
- parse->priv->upstream_has_duration);
-}
-
-/* checks src caps to determine if dealing with audio or video */
-/* TODO maybe forego automagic stuff and let subclass configure it ? */
-static void
-gst_base_parse_check_media (GstBaseParse * parse)
-{
- GstCaps *caps;
- GstStructure *s;
-
- caps = GST_PAD_CAPS (parse->srcpad);
- if (G_LIKELY (caps) && (s = gst_caps_get_structure (caps, 0))) {
- parse->priv->is_video =
- g_str_has_prefix (gst_structure_get_name (s), "video");
- } else {
- /* historical default */
- parse->priv->is_video = FALSE;
- }
-
- GST_DEBUG_OBJECT (parse, "media is video == %d", parse->priv->is_video);
-}
-
-/**
- * gst_base_parse_handle_and_push_buffer:
- * @parse: #GstBaseParse.
- * @klass: #GstBaseParseClass.
- * @buffer: #GstBuffer.
- *
- * Parses the frame from given buffer and pushes it forward. Also performs
- * timestamp handling and checks the segment limits.
- *
- * This is called with srcpad STREAM_LOCK held.
- *
- * Returns: #GstFlowReturn
- */
-static GstFlowReturn
-gst_base_parse_handle_and_push_frame (GstBaseParse * parse,
- GstBaseParseClass * klass, GstBaseParseFrame * frame)
-{
- GstFlowReturn ret;
- gint64 offset;
- GstBuffer *buffer;
-
- g_return_val_if_fail (frame != NULL, GST_FLOW_ERROR);
-
- buffer = frame->buffer;
-
- if (parse->priv->discont) {
- GST_DEBUG_OBJECT (parse, "marking DISCONT");
- GST_BUFFER_FLAG_SET (buffer, GST_BUFFER_FLAG_DISCONT);
- parse->priv->discont = FALSE;
- }
-
- /* some one-time start-up */
- if (G_UNLIKELY (!parse->priv->framecount)) {
- gst_base_parse_check_seekability (parse);
- gst_base_parse_check_upstream (parse);
- }
-
- GST_LOG_OBJECT (parse,
- "parsing frame at offset %" G_GUINT64_FORMAT
- " (%#" G_GINT64_MODIFIER "x) of size %d",
- GST_BUFFER_OFFSET (buffer), GST_BUFFER_OFFSET (buffer),
- GST_BUFFER_SIZE (buffer));
-
- /* use default handler to provide initial (upstream) metadata */
- gst_base_parse_parse_frame (parse, frame);
-
- /* store offset as it might get overwritten */
- offset = GST_BUFFER_OFFSET (buffer);
- ret = klass->parse_frame (parse, frame);
- /* sync */
- buffer = frame->buffer;
- /* subclass must play nice */
- g_return_val_if_fail (buffer != NULL, GST_FLOW_ERROR);
-
- /* check if subclass/format can provide ts.
- * If so, that allows and enables extra seek and duration determining options */
- if (G_UNLIKELY (parse->priv->first_frame_offset < 0 && ret == GST_FLOW_OK)) {
- if (GST_BUFFER_TIMESTAMP_IS_VALID (buffer) &&
- GST_BASE_PARSE_HAS_TIME (parse) &&
- parse->priv->pad_mode == GST_ACTIVATE_PULL) {
- parse->priv->first_frame_offset = offset;
- parse->priv->first_frame_ts = GST_BUFFER_TIMESTAMP (buffer);
- GST_DEBUG_OBJECT (parse, "subclass provided ts %" GST_TIME_FORMAT
- " for first frame at offset %" G_GINT64_FORMAT,
- GST_TIME_ARGS (parse->priv->first_frame_ts),
- parse->priv->first_frame_offset);
- if (!GST_CLOCK_TIME_IS_VALID (parse->priv->duration)) {
- gint64 off;
- GstClockTime last_ts = G_MAXINT64;
-
- GST_DEBUG_OBJECT (parse, "no duration; trying scan to determine");
- gst_base_parse_locate_time (parse, &last_ts, &off);
- if (GST_CLOCK_TIME_IS_VALID (last_ts))
- gst_base_parse_set_duration (parse, GST_FORMAT_TIME, last_ts, 0);
- }
- } else {
- /* disable further checks */
- parse->priv->first_frame_offset = 0;
- }
- }
-
- /* again use default handler to add missing metadata;
- * we may have new information on frame properties */
- gst_base_parse_parse_frame (parse, frame);
- if (GST_BUFFER_TIMESTAMP_IS_VALID (buffer) &&
- GST_BUFFER_DURATION_IS_VALID (buffer)) {
- parse->priv->next_ts =
- GST_BUFFER_TIMESTAMP (buffer) + GST_BUFFER_DURATION (buffer);
- } else {
- /* we lost track, do not produce bogus time next time around
- * (probably means parser subclass has given up on parsing as well) */
- GST_DEBUG_OBJECT (parse, "no next fallback timestamp");
- parse->priv->next_ts = GST_CLOCK_TIME_NONE;
- }
-
- if (parse->priv->upstream_seekable && parse->priv->exact_position &&
- GST_BUFFER_TIMESTAMP_IS_VALID (buffer))
- gst_base_parse_add_index_entry (parse, offset,
- GST_BUFFER_TIMESTAMP (buffer),
- !GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_DELTA_UNIT), FALSE);
-
- /* First buffers are dropped, this means that the subclass needs more
- * frames to decide on the format and queues them internally */
- /* convert internal flow to OK and mark discont for the next buffer. */
- if (ret == GST_BASE_PARSE_FLOW_DROPPED) {
- gst_base_parse_frame_clear (parse, frame);
- return GST_FLOW_OK;
- } else if (ret != GST_FLOW_OK) {
- return ret;
- }
-
- return gst_base_parse_push_frame (parse, frame);
-}
-
-/**
- * gst_base_parse_push_frame:
- * @parse: #GstBaseParse.
- * @frame: #GstBaseParseFrame.
- *
- * Pushes the frame downstream, sends any pending events and
- * does some timestamp and segment handling.
- *
- * This must be called with sinkpad STREAM_LOCK held.
- *
- * Returns: #GstFlowReturn
- */
-GstFlowReturn
-gst_base_parse_push_frame (GstBaseParse * parse, GstBaseParseFrame * frame)
-{
- GstFlowReturn ret = GST_FLOW_OK;
- GstClockTime last_start = GST_CLOCK_TIME_NONE;
- GstClockTime last_stop = GST_CLOCK_TIME_NONE;
- GstBaseParseClass *klass = GST_BASE_PARSE_GET_CLASS (parse);
- GstBuffer *buffer;
-
- g_return_val_if_fail (frame != NULL, GST_FLOW_ERROR);
- g_return_val_if_fail (frame->buffer != NULL, GST_FLOW_ERROR);
-
- buffer = frame->buffer;
-
- GST_LOG_OBJECT (parse,
- "processing buffer of size %d with ts %" GST_TIME_FORMAT
- ", duration %" GST_TIME_FORMAT, GST_BUFFER_SIZE (buffer),
- GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buffer)),
- GST_TIME_ARGS (GST_BUFFER_DURATION (buffer)));
-
- /* update stats */
- parse->priv->bytecount += GST_BUFFER_SIZE (buffer);
- if (G_LIKELY (!(frame->flags & GST_BASE_PARSE_FRAME_FLAG_NO_FRAME))) {
- parse->priv->framecount++;
- if (GST_BUFFER_DURATION_IS_VALID (buffer)) {
- parse->priv->acc_duration += GST_BUFFER_DURATION (buffer);
- }
- }
- /* 0 means disabled */
- if (parse->priv->update_interval < 0)
- parse->priv->update_interval = 50;
- else if (parse->priv->update_interval > 0 &&
- (parse->priv->framecount % parse->priv->update_interval) == 0)
- gst_base_parse_update_duration (parse);
-
- if (GST_BUFFER_TIMESTAMP_IS_VALID (buffer))
- last_start = last_stop = GST_BUFFER_TIMESTAMP (buffer);
- if (last_start != GST_CLOCK_TIME_NONE
- && GST_BUFFER_DURATION_IS_VALID (buffer))
- last_stop = last_start + GST_BUFFER_DURATION (buffer);
-
- /* should have caps by now */
- g_return_val_if_fail (GST_PAD_CAPS (parse->srcpad), GST_FLOW_ERROR);
-
- /* segment adjustment magic; only if we are running the whole show */
- if (!GST_BASE_PARSE_PASSTHROUGH (parse) && parse->segment.rate > 0.0 &&
- (parse->priv->pad_mode == GST_ACTIVATE_PULL ||
- parse->priv->upstream_seekable)) {
- /* segment times are typically estimates,
- * actual frame data might lead subclass to different timestamps,
- * so override segment start from what is supplied there */
- if (G_UNLIKELY (parse->pending_segment && !parse->priv->exact_position &&
- GST_CLOCK_TIME_IS_VALID (last_start))) {
- gst_event_unref (parse->pending_segment);
- parse->segment.start =
- MIN ((guint64) last_start, (guint64) parse->segment.stop);
- GST_DEBUG_OBJECT (parse,
- "adjusting pending segment start to %" GST_TIME_FORMAT,
- GST_TIME_ARGS (parse->segment.start));
- parse->pending_segment =
- gst_event_new_new_segment (FALSE, parse->segment.rate,
- parse->segment.format, parse->segment.start, parse->segment.stop,
- parse->segment.start);
- }
- /* handle gaps, e.g. non-zero start-time, in as much not handled by above */
- if (GST_CLOCK_TIME_IS_VALID (parse->segment.last_stop) &&
- GST_CLOCK_TIME_IS_VALID (last_start)) {
- GstClockTimeDiff diff;
-
- /* only send newsegments with increasing start times,
- * otherwise if these go back and forth downstream (sinks) increase
- * accumulated time and running_time */
- diff = GST_CLOCK_DIFF (parse->segment.last_stop, last_start);
- if (G_UNLIKELY (diff > 2 * GST_SECOND && last_start > parse->segment.start
- && (!GST_CLOCK_TIME_IS_VALID (parse->segment.stop) ||
- last_start < parse->segment.stop))) {
- GST_DEBUG_OBJECT (parse,
- "Gap of %" G_GINT64_FORMAT " ns detected in stream "
- "(%" GST_TIME_FORMAT " -> %" GST_TIME_FORMAT "). "
- "Sending updated NEWSEGMENT events", diff,
- GST_TIME_ARGS (parse->segment.last_stop),
- GST_TIME_ARGS (last_start));
- if (G_UNLIKELY (parse->pending_segment)) {
- gst_event_unref (parse->pending_segment);
- parse->segment.start = last_start;
- parse->pending_segment =
- gst_event_new_new_segment (FALSE, parse->segment.rate,
- parse->segment.format, parse->segment.start, parse->segment.stop,
- parse->segment.start);
- } else {
- /* send newsegment events such that the gap is not accounted in
- * accum time, hence running_time */
- /* close ahead of gap */
- gst_pad_push_event (parse->srcpad,
- gst_event_new_new_segment (TRUE, parse->segment.rate,
- parse->segment.format, parse->segment.last_stop,
- parse->segment.last_stop, parse->segment.last_stop));
- /* skip gap */
- gst_pad_push_event (parse->srcpad,
- gst_event_new_new_segment (FALSE, parse->segment.rate,
- parse->segment.format, last_start, parse->segment.stop,
- last_start));
- }
- /* align segment view with downstream,
- * prevents double-counting accum when closing segment */
- gst_segment_set_newsegment (&parse->segment, FALSE,
- parse->segment.rate, parse->segment.format, last_start,
- parse->segment.stop, last_start);
- parse->segment.last_stop = last_start;
- }
- }
- }
-
- /* and should then also be linked downstream, so safe to send some events */
- if (G_UNLIKELY (parse->close_segment)) {
- /* only set up by loop */
- GST_DEBUG_OBJECT (parse, "loop sending close segment");
- gst_pad_push_event (parse->srcpad, parse->close_segment);
- parse->close_segment = NULL;
- }
- if (G_UNLIKELY (parse->pending_segment)) {
- GST_DEBUG_OBJECT (parse, "%s push pending segment",
- parse->priv->pad_mode == GST_ACTIVATE_PULL ? "loop" : "chain");
- gst_pad_push_event (parse->srcpad, parse->pending_segment);
- parse->pending_segment = NULL;
-
- /* have caps; check identity */
- gst_base_parse_check_media (parse);
- }
-
- /* update bitrates and optionally post corresponding tags
- * (following newsegment) */
- gst_base_parse_update_bitrates (parse, frame);
-
- if (G_UNLIKELY (parse->priv->pending_events)) {
- GList *l;
-
- for (l = parse->priv->pending_events; l != NULL; l = l->next) {
- gst_pad_push_event (parse->srcpad, GST_EVENT (l->data));
- }
- g_list_free (parse->priv->pending_events);
- parse->priv->pending_events = NULL;
- }
-
- if (klass->pre_push_frame) {
- ret = klass->pre_push_frame (parse, frame);
- } else {
- frame->flags |= GST_BASE_PARSE_FRAME_FLAG_CLIP;
- }
-
- /* take final ownership of frame buffer */
- buffer = frame->buffer;
- frame->buffer = NULL;
-
- /* subclass must play nice */
- g_return_val_if_fail (buffer != NULL, GST_FLOW_ERROR);
-
- /* decorate */
- buffer = gst_buffer_make_metadata_writable (buffer);
- gst_buffer_set_caps (buffer, GST_PAD_CAPS (parse->srcpad));
-
- parse->priv->seen_keyframe |= parse->priv->is_video &&
- !GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_DELTA_UNIT);
-
- if (frame->flags & GST_BASE_PARSE_FRAME_FLAG_CLIP) {
- if (GST_BUFFER_TIMESTAMP_IS_VALID (buffer) &&
- GST_CLOCK_TIME_IS_VALID (parse->segment.stop) &&
- GST_BUFFER_TIMESTAMP (buffer) >
- parse->segment.stop + parse->priv->lead_out_ts) {
- GST_LOG_OBJECT (parse, "Dropped frame, after segment");
- ret = GST_FLOW_UNEXPECTED;
- } else if (GST_BUFFER_TIMESTAMP_IS_VALID (buffer) &&
- GST_BUFFER_DURATION_IS_VALID (buffer) &&
- GST_CLOCK_TIME_IS_VALID (parse->segment.start) &&
- GST_BUFFER_TIMESTAMP (buffer) + GST_BUFFER_DURATION (buffer) +
- parse->priv->lead_in_ts < parse->segment.start) {
- if (parse->priv->seen_keyframe) {
- GST_LOG_OBJECT (parse, "Frame before segment, after keyframe");
- ret = GST_FLOW_OK;
- } else {
- GST_LOG_OBJECT (parse, "Dropped frame, before segment");
- ret = GST_BASE_PARSE_FLOW_DROPPED;
- }
- } else {
- ret = GST_FLOW_OK;
- }
- }
-
- if (ret == GST_BASE_PARSE_FLOW_DROPPED) {
- GST_LOG_OBJECT (parse, "frame (%d bytes) dropped",
- GST_BUFFER_SIZE (buffer));
- gst_buffer_unref (buffer);
- ret = GST_FLOW_OK;
- } else if (ret == GST_FLOW_OK) {
- if (parse->segment.rate > 0.0) {
- ret = gst_pad_push (parse->srcpad, buffer);
- GST_LOG_OBJECT (parse, "frame (%d bytes) pushed: %s",
- GST_BUFFER_SIZE (buffer), gst_flow_get_name (ret));
- } else {
- GST_LOG_OBJECT (parse, "frame (%d bytes) queued for now",
- GST_BUFFER_SIZE (buffer));
- parse->priv->buffers_queued =
- g_slist_prepend (parse->priv->buffers_queued, buffer);
- ret = GST_FLOW_OK;
- }
- } else {
- gst_buffer_unref (buffer);
- GST_LOG_OBJECT (parse, "frame (%d bytes) not pushed: %s",
- GST_BUFFER_SIZE (buffer), gst_flow_get_name (ret));
- /* if we are not sufficiently in control, let upstream decide on EOS */
- if (ret == GST_FLOW_UNEXPECTED &&
- (GST_BASE_PARSE_PASSTHROUGH (parse) ||
- (parse->priv->pad_mode == GST_ACTIVATE_PUSH &&
- !parse->priv->upstream_seekable)))
- ret = GST_FLOW_OK;
- }
-
- /* Update current running segment position */
- if (ret == GST_FLOW_OK && last_stop != GST_CLOCK_TIME_NONE &&
- parse->segment.last_stop < last_stop)
- gst_segment_set_last_stop (&parse->segment, GST_FORMAT_TIME, last_stop);
-
- gst_base_parse_frame_clear (parse, frame);
-
- return ret;
-}
-
-
-/**
- * gst_base_parse_drain:
- * @parse: #GstBaseParse.
- *
- * Drains the adapter until it is empty. It decreases the min_frame_size to
- * match the current adapter size and calls chain method until the adapter
- * is emptied or chain returns with error.
- */
-static void
-gst_base_parse_drain (GstBaseParse * parse)
-{
- guint avail;
-
- GST_DEBUG_OBJECT (parse, "draining");
- parse->priv->drain = TRUE;
-
- for (;;) {
- avail = gst_adapter_available (parse->adapter);
- if (!avail)
- break;
-
- if (gst_base_parse_chain (parse->sinkpad, NULL) != GST_FLOW_OK) {
- break;
- }
-
- /* nothing changed, maybe due to truncated frame; break infinite loop */
- if (avail == gst_adapter_available (parse->adapter)) {
- GST_DEBUG_OBJECT (parse, "no change during draining; flushing");
- gst_adapter_clear (parse->adapter);
- }
- }
-
- parse->priv->drain = FALSE;
-}
-
-/**
- * gst_base_parse_process_fragment:
- * @parse: #GstBaseParse.
- *
- * Sends buffers collected in send_buffers downstream, and ensures that list
- * is empty at the end (errors or not).
- */
-static GstFlowReturn
-gst_base_parse_send_buffers (GstBaseParse * parse)
-{
- GSList *send = NULL;
- GstBuffer *buf;
- GstFlowReturn ret = GST_FLOW_OK;
-
- send = parse->priv->buffers_send;
-
- /* send buffers */
- while (send) {
- buf = GST_BUFFER_CAST (send->data);
- GST_LOG_OBJECT (parse, "pushing buffer %p, timestamp %"
- GST_TIME_FORMAT ", duration %" GST_TIME_FORMAT
- ", offset %" G_GINT64_FORMAT, buf,
- GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buf)),
- GST_TIME_ARGS (GST_BUFFER_DURATION (buf)), GST_BUFFER_OFFSET (buf));
-
- /* iterate output queue an push downstream */
- ret = gst_pad_push (parse->srcpad, buf);
- send = g_slist_delete_link (send, send);
-
- /* clear any leftover if error */
- if (G_UNLIKELY (ret != GST_FLOW_OK)) {
- while (send) {
- buf = GST_BUFFER_CAST (send->data);
- gst_buffer_unref (buf);
- send = g_slist_delete_link (send, send);
- }
- }
- }
-
- parse->priv->buffers_send = send;
-
- return ret;
-}
-
-/**
- * gst_base_parse_process_fragment:
- * @parse: #GstBaseParse.
- *
- * Processes a reverse playback (forward) fragment:
- * - append head of last fragment that was skipped to current fragment data
- * - drain the resulting current fragment data (i.e. repeated chain)
- * - add time/duration (if needed) to frames queued by chain
- * - push queued data
- */
-static GstFlowReturn
-gst_base_parse_process_fragment (GstBaseParse * parse, gboolean push_only)
-{
- GstBuffer *buf;
- GstFlowReturn ret = GST_FLOW_OK;
- gboolean seen_key = FALSE, seen_delta = FALSE;
-
- if (push_only)
- goto push;
-
- /* restore order */
- parse->priv->buffers_pending = g_slist_reverse (parse->priv->buffers_pending);
- while (parse->priv->buffers_pending) {
- buf = GST_BUFFER_CAST (parse->priv->buffers_pending->data);
- GST_LOG_OBJECT (parse, "adding pending buffer (size %d)",
- GST_BUFFER_SIZE (buf));
- gst_adapter_push (parse->adapter, buf);
- parse->priv->buffers_pending =
- g_slist_delete_link (parse->priv->buffers_pending,
- parse->priv->buffers_pending);
- }
-
- /* invalidate so no fall-back timestamping is performed;
- * ok if taken from subclass or upstream */
- parse->priv->next_ts = GST_CLOCK_TIME_NONE;
- /* prevent it hanging around stop all the time */
- parse->segment.last_stop = GST_CLOCK_TIME_NONE;
- /* mark next run */
- parse->priv->discont = TRUE;
-
- /* chain looks for frames and queues resulting ones (in stead of pushing) */
- /* initial skipped data is added to buffers_pending */
- gst_base_parse_drain (parse);
-
-push:
- if (parse->priv->buffers_send) {
- buf = GST_BUFFER_CAST (parse->priv->buffers_send->data);
- seen_key |= !GST_BUFFER_FLAG_IS_SET (buf, GST_BUFFER_FLAG_DELTA_UNIT);
- }
-
- /* add metadata (if needed to queued buffers */
- GST_LOG_OBJECT (parse, "last timestamp: %" GST_TIME_FORMAT,
- GST_TIME_ARGS (parse->priv->last_ts));
- while (parse->priv->buffers_queued) {
- buf = GST_BUFFER_CAST (parse->priv->buffers_queued->data);
-
- /* no touching if upstream or parsing provided time */
- if (GST_BUFFER_TIMESTAMP_IS_VALID (buf)) {
- GST_LOG_OBJECT (parse, "buffer has time %" GST_TIME_FORMAT,
- GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buf)));
- } else if (GST_CLOCK_TIME_IS_VALID (parse->priv->last_ts) &&
- GST_BUFFER_DURATION_IS_VALID (buf)) {
- if (G_LIKELY (GST_BUFFER_DURATION (buf) <= parse->priv->last_ts))
- parse->priv->last_ts -= GST_BUFFER_DURATION (buf);
- else
- parse->priv->last_ts = 0;
- GST_BUFFER_TIMESTAMP (buf) = parse->priv->last_ts;
- GST_LOG_OBJECT (parse, "applied time %" GST_TIME_FORMAT,
- GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buf)));
- } else {
- /* no idea, very bad */
- GST_WARNING_OBJECT (parse, "could not determine time for buffer");
- }
-
- parse->priv->last_ts = GST_BUFFER_TIMESTAMP (buf);
-
- /* reverse order for ascending sending */
- /* send downstream at keyframe not preceded by a keyframe
- * (e.g. that should identify start of collection of IDR nals) */
- if (GST_BUFFER_FLAG_IS_SET (buf, GST_BUFFER_FLAG_DELTA_UNIT)) {
- if (seen_key) {
- ret = gst_base_parse_send_buffers (parse);
- /* if a problem, throw all to sending */
- if (ret != GST_FLOW_OK) {
- parse->priv->buffers_send =
- g_slist_reverse (parse->priv->buffers_queued);
- parse->priv->buffers_queued = NULL;
- break;
- }
- seen_key = FALSE;
- }
- } else {
- seen_delta = TRUE;
- }
-
- seen_key |= !GST_BUFFER_FLAG_IS_SET (buf, GST_BUFFER_FLAG_DELTA_UNIT);
-
- parse->priv->buffers_send =
- g_slist_prepend (parse->priv->buffers_send, buf);
- parse->priv->buffers_queued =
- g_slist_delete_link (parse->priv->buffers_queued,
- parse->priv->buffers_queued);
- }
-
- /* audio may have all marked as keyframe, so arrange to send here */
- if (!seen_delta)
- ret = gst_base_parse_send_buffers (parse);
-
- /* any trailing unused no longer usable (ideally none) */
- if (G_UNLIKELY (gst_adapter_available (parse->adapter))) {
- GST_DEBUG_OBJECT (parse, "discarding %d trailing bytes",
- gst_adapter_available (parse->adapter));
- gst_adapter_clear (parse->adapter);
- }
-
- return ret;
-}
-
-/* small helper that checks whether we have been trying to resync too long */
-static inline GstFlowReturn
-gst_base_parse_check_sync (GstBaseParse * parse)
-{
- if (G_UNLIKELY (parse->priv->discont &&
- parse->priv->offset - parse->priv->sync_offset > 2 * 1024 * 1024)) {
- GST_ELEMENT_ERROR (parse, STREAM, DECODE,
- ("Failed to parse stream"), (NULL));
- return GST_FLOW_ERROR;
- }
-
- return GST_FLOW_OK;
-}
-
-
-/**
- * gst_base_parse_chain:
- * @pad: #GstPad.
- * @buffer: #GstBuffer.
- *
- * Returns: #GstFlowReturn.
- */
-static GstFlowReturn
-gst_base_parse_chain (GstPad * pad, GstBuffer * buffer)
-{
- GstBaseParseClass *bclass;
- GstBaseParse *parse;
- GstFlowReturn ret = GST_FLOW_OK;
- GstBuffer *outbuf = NULL;
- GstBuffer *tmpbuf = NULL;
- guint fsize = 1;
- gint skip = -1;
- const guint8 *data;
- guint old_min_size = 0, min_size, av;
- GstClockTime timestamp;
- GstBaseParseFrame _frame = { 0, };
- GstBaseParseFrame *frame;
-
- parse = GST_BASE_PARSE (GST_OBJECT_PARENT (pad));
- bclass = GST_BASE_PARSE_GET_CLASS (parse);
- frame = &_frame;
-
- if (G_LIKELY (buffer)) {
- GST_LOG_OBJECT (parse, "buffer size: %d, offset = %" G_GINT64_FORMAT,
- GST_BUFFER_SIZE (buffer), GST_BUFFER_OFFSET (buffer));
- if (G_UNLIKELY (GST_BASE_PARSE_PASSTHROUGH (parse))) {
- frame->buffer = gst_buffer_make_metadata_writable (buffer);
- return gst_base_parse_push_frame (parse, frame);
- }
- /* upstream feeding us in reverse playback;
- * gather each fragment, then process it in single run */
- if (parse->segment.rate < 0.0) {
- if (G_UNLIKELY (GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_DISCONT))) {
- GST_DEBUG_OBJECT (parse, "buffer starts new reverse playback fragment");
- ret = gst_base_parse_process_fragment (parse, FALSE);
- }
- gst_adapter_push (parse->adapter, buffer);
- return ret;
- }
- gst_adapter_push (parse->adapter, buffer);
- }
-
- /* Parse and push as many frames as possible */
- /* Stop either when adapter is empty or we are flushing */
- while (!parse->priv->flushing) {
- gboolean res;
-
- tmpbuf = gst_buffer_new ();
-
- old_min_size = 0;
- /* Synchronization loop */
- for (;;) {
- min_size = MAX (parse->priv->min_frame_size, fsize);
- av = gst_adapter_available (parse->adapter);
-
- /* loop safety check */
- if (G_UNLIKELY (old_min_size >= min_size))
- goto invalid_min;
- old_min_size = min_size;
-
- if (G_UNLIKELY (parse->priv->drain)) {
- min_size = av;
- GST_DEBUG_OBJECT (parse, "draining, data left: %d", min_size);
- if (G_UNLIKELY (!min_size)) {
- gst_buffer_unref (tmpbuf);
- goto done;
- }
- }
-
- /* Collect at least min_frame_size bytes */
- if (av < min_size) {
- GST_DEBUG_OBJECT (parse, "not enough data available (only %d bytes)",
- av);
- gst_buffer_unref (tmpbuf);
- goto done;
- }
-
- /* always pass all available data */
- data = gst_adapter_peek (parse->adapter, av);
- GST_BUFFER_DATA (tmpbuf) = (guint8 *) data;
- GST_BUFFER_SIZE (tmpbuf) = min_size;
- GST_BUFFER_OFFSET (tmpbuf) = parse->priv->offset;
- GST_BUFFER_FLAG_SET (tmpbuf, GST_MINI_OBJECT_FLAG_READONLY);
-
- if (parse->priv->discont) {
- GST_DEBUG_OBJECT (parse, "marking DISCONT");
- GST_BUFFER_FLAG_SET (tmpbuf, GST_BUFFER_FLAG_DISCONT);
- }
-
- skip = -1;
- gst_base_parse_frame_update (parse, frame, tmpbuf);
- res = bclass->check_valid_frame (parse, frame, &fsize, &skip);
- gst_buffer_replace (&frame->buffer, NULL);
- if (res) {
- if (gst_adapter_available (parse->adapter) < fsize) {
- GST_DEBUG_OBJECT (parse,
- "found valid frame but not enough data available (only %d bytes)",
- gst_adapter_available (parse->adapter));
- gst_buffer_unref (tmpbuf);
- goto done;
- }
- GST_LOG_OBJECT (parse, "valid frame of size %d at pos %d", fsize, skip);
- break;
- }
- if (skip == -1) {
- /* subclass didn't touch this value. By default we skip 1 byte */
- skip = 1;
- }
- if (skip > 0) {
- GST_LOG_OBJECT (parse, "finding sync, skipping %d bytes", skip);
- if (parse->segment.rate < 0.0 && !parse->priv->buffers_queued) {
- /* reverse playback, and no frames found yet, so we are skipping
- * the leading part of a fragment, which may form the tail of
- * fragment coming later, hopefully subclass skips efficiently ... */
- timestamp = gst_adapter_prev_timestamp (parse->adapter, NULL);
- outbuf = gst_adapter_take_buffer (parse->adapter, skip);
- outbuf = gst_buffer_make_metadata_writable (outbuf);
- GST_BUFFER_TIMESTAMP (outbuf) = timestamp;
- parse->priv->buffers_pending =
- g_slist_prepend (parse->priv->buffers_pending, outbuf);
- outbuf = NULL;
- } else {
- gst_adapter_flush (parse->adapter, skip);
- }
- parse->priv->offset += skip;
- if (!parse->priv->discont)
- parse->priv->sync_offset = parse->priv->offset;
- parse->priv->discont = TRUE;
- /* something changed least; nullify loop check */
- old_min_size = 0;
- }
- /* skip == 0 should imply subclass set min_size to need more data;
- * we check this shortly */
- if ((ret = gst_base_parse_check_sync (parse)) != GST_FLOW_OK) {
- gst_buffer_unref (tmpbuf);
- goto done;
- }
- }
- gst_buffer_unref (tmpbuf);
- tmpbuf = NULL;
-
- if (skip > 0) {
- /* Subclass found the sync, but still wants to skip some data */
- GST_LOG_OBJECT (parse, "skipping %d bytes", skip);
- gst_adapter_flush (parse->adapter, skip);
- parse->priv->offset += skip;
- }
-
- /* Grab lock to prevent a race with FLUSH_START handler */
- GST_PAD_STREAM_LOCK (parse->srcpad);
-
- /* FLUSH_START event causes the "flushing" flag to be set. In this
- * case we can leave the frame pushing loop */
- if (parse->priv->flushing) {
- GST_PAD_STREAM_UNLOCK (parse->srcpad);
- break;
- }
-
- /* move along with upstream timestamp (if any),
- * but interpolate in between */
- timestamp = gst_adapter_prev_timestamp (parse->adapter, NULL);
- if (GST_CLOCK_TIME_IS_VALID (timestamp) &&
- (parse->priv->prev_ts != timestamp)) {
- parse->priv->prev_ts = parse->priv->next_ts = timestamp;
- }
-
- /* FIXME: Would it be more efficient to make a subbuffer instead? */
- outbuf = gst_adapter_take_buffer (parse->adapter, fsize);
- outbuf = gst_buffer_make_metadata_writable (outbuf);
-
- /* Subclass may want to know the data offset */
- GST_BUFFER_OFFSET (outbuf) = parse->priv->offset;
- parse->priv->offset += fsize;
- GST_BUFFER_TIMESTAMP (outbuf) = GST_CLOCK_TIME_NONE;
- GST_BUFFER_DURATION (outbuf) = GST_CLOCK_TIME_NONE;
-
- frame->buffer = outbuf;
- ret = gst_base_parse_handle_and_push_frame (parse, bclass, frame);
- GST_PAD_STREAM_UNLOCK (parse->srcpad);
-
- if (ret != GST_FLOW_OK) {
- GST_LOG_OBJECT (parse, "push returned %d", ret);
- break;
- }
- }
-
-done:
- GST_LOG_OBJECT (parse, "chain leaving");
- return ret;
-
- /* ERRORS */
-invalid_min:
- {
- GST_ELEMENT_ERROR (parse, STREAM, FAILED, (NULL),
- ("min_size evolution %d -> %d; breaking to avoid looping",
- old_min_size, min_size));
- return GST_FLOW_ERROR;
- }
-}
-
-/* pull @size bytes at current offset,
- * i.e. at least try to and possibly return a shorter buffer if near the end */
-static GstFlowReturn
-gst_base_parse_pull_range (GstBaseParse * parse, guint size,
- GstBuffer ** buffer)
-{
- GstFlowReturn ret = GST_FLOW_OK;
-
- g_return_val_if_fail (buffer != NULL, GST_FLOW_ERROR);
-
- /* Caching here actually makes much less difference than one would expect.
- * We do it mainly to avoid pulling buffers of 1 byte all the time */
- if (parse->priv->cache) {
- gint64 cache_offset = GST_BUFFER_OFFSET (parse->priv->cache);
- gint cache_size = GST_BUFFER_SIZE (parse->priv->cache);
-
- if (cache_offset <= parse->priv->offset &&
- (parse->priv->offset + size) <= (cache_offset + cache_size)) {
- *buffer = gst_buffer_create_sub (parse->priv->cache,
- parse->priv->offset - cache_offset, size);
- GST_BUFFER_OFFSET (*buffer) = parse->priv->offset;
- return GST_FLOW_OK;
- }
- /* not enough data in the cache, free cache and get a new one */
- gst_buffer_unref (parse->priv->cache);
- parse->priv->cache = NULL;
- }
-
- /* refill the cache */
- ret =
- gst_pad_pull_range (parse->sinkpad, parse->priv->offset, MAX (size,
- 64 * 1024), &parse->priv->cache);
- if (ret != GST_FLOW_OK) {
- parse->priv->cache = NULL;
- return ret;
- }
-
- if (GST_BUFFER_SIZE (parse->priv->cache) >= size) {
- *buffer = gst_buffer_create_sub (parse->priv->cache, 0, size);
- GST_BUFFER_OFFSET (*buffer) = parse->priv->offset;
- return GST_FLOW_OK;
- }
-
- /* Not possible to get enough data, try a last time with
- * requesting exactly the size we need */
- gst_buffer_unref (parse->priv->cache);
- parse->priv->cache = NULL;
-
- ret = gst_pad_pull_range (parse->sinkpad, parse->priv->offset, size,
- &parse->priv->cache);
-
- if (ret != GST_FLOW_OK) {
- GST_DEBUG_OBJECT (parse, "pull_range returned %d", ret);
- *buffer = NULL;
- return ret;
- }
-
- if (GST_BUFFER_SIZE (parse->priv->cache) < size) {
- GST_DEBUG_OBJECT (parse, "Returning short buffer at offset %"
- G_GUINT64_FORMAT ": wanted %u bytes, got %u bytes", parse->priv->offset,
- size, GST_BUFFER_SIZE (parse->priv->cache));
-
- *buffer = parse->priv->cache;
- parse->priv->cache = NULL;
-
- return GST_FLOW_OK;
- }
-
- *buffer = gst_buffer_create_sub (parse->priv->cache, 0, size);
- GST_BUFFER_OFFSET (*buffer) = parse->priv->offset;
-
- return GST_FLOW_OK;
-}
-
-static GstFlowReturn
-gst_base_parse_handle_previous_fragment (GstBaseParse * parse)
-{
- gint64 offset = 0;
- GstClockTime ts = 0;
- GstBuffer *buffer;
- GstFlowReturn ret;
-
- GST_DEBUG_OBJECT (parse, "fragment ended; last_ts = %" GST_TIME_FORMAT
- ", last_offset = %" G_GINT64_FORMAT, GST_TIME_ARGS (parse->priv->last_ts),
- parse->priv->last_offset);
-
- if (!parse->priv->last_offset || parse->priv->last_ts <= parse->segment.start) {
- GST_DEBUG_OBJECT (parse, "past start of segment %" GST_TIME_FORMAT,
- GST_TIME_ARGS (parse->segment.start));
- ret = GST_FLOW_UNEXPECTED;
- goto exit;
- }
-
- /* last fragment started at last_offset / last_ts;
- * seek back 10s capped at 1MB */
- if (parse->priv->last_ts >= 10 * GST_SECOND)
- ts = parse->priv->last_ts - 10 * GST_SECOND;
- /* if we are exact now, we will be more so going backwards */
- if (parse->priv->exact_position) {
- offset = gst_base_parse_find_offset (parse, ts, TRUE, NULL);
- } else {
- GstFormat dstformat = GST_FORMAT_BYTES;
-
- if (!gst_pad_query_convert (parse->srcpad, GST_FORMAT_TIME, ts,
- &dstformat, &offset)) {
- GST_DEBUG_OBJECT (parse, "conversion failed, only BYTE based");
- }
- }
- offset = CLAMP (offset, parse->priv->last_offset - 1024 * 1024,
- parse->priv->last_offset - 1024);
- offset = MAX (0, offset);
-
- GST_DEBUG_OBJECT (parse, "next fragment from offset %" G_GINT64_FORMAT,
- offset);
- parse->priv->offset = offset;
-
- ret = gst_base_parse_pull_range (parse, parse->priv->last_offset - offset,
- &buffer);
- if (ret != GST_FLOW_OK)
- goto exit;
-
- /* offset will increase again as fragment is processed/parsed */
- parse->priv->last_offset = offset;
-
- gst_adapter_push (parse->adapter, buffer);
- ret = gst_base_parse_process_fragment (parse, FALSE);
- if (ret != GST_FLOW_OK)
- goto exit;
-
- /* force previous fragment */
- parse->priv->offset = -1;
-
-exit:
- return ret;
-}
-
-/* PULL mode:
- * pull and scan for next frame starting from current offset
- * ajusts sync, drain and offset going along */
-static GstFlowReturn
-gst_base_parse_scan_frame (GstBaseParse * parse, GstBaseParseClass * klass,
- GstBaseParseFrame * frame, gboolean full)
-{
- GstBuffer *buffer, *outbuf;
- GstFlowReturn ret = GST_FLOW_OK;
- guint fsize = 1, min_size, old_min_size = 0;
- gint skip = 0;
-
- g_return_val_if_fail (frame != NULL, GST_FLOW_ERROR);
-
- GST_LOG_OBJECT (parse, "scanning for frame at offset %" G_GUINT64_FORMAT
- " (%#" G_GINT64_MODIFIER "x)", parse->priv->offset, parse->priv->offset);
-
- while (TRUE) {
- gboolean res;
-
- min_size = MAX (parse->priv->min_frame_size, fsize);
- /* loop safety check */
- if (G_UNLIKELY (old_min_size >= min_size))
- goto invalid_min;
- old_min_size = min_size;
-
- ret = gst_base_parse_pull_range (parse, min_size, &buffer);
- if (ret != GST_FLOW_OK)
- goto done;
-
- if (parse->priv->discont) {
- GST_DEBUG_OBJECT (parse, "marking DISCONT");
- GST_BUFFER_FLAG_SET (buffer, GST_BUFFER_FLAG_DISCONT);
- }
-
- /* if we got a short read, inform subclass we are draining leftover
- * and no more is to be expected */
- if (GST_BUFFER_SIZE (buffer) < min_size)
- parse->priv->drain = TRUE;
-
- skip = -1;
- gst_base_parse_frame_update (parse, frame, buffer);
- res = klass->check_valid_frame (parse, frame, &fsize, &skip);
- gst_buffer_replace (&frame->buffer, NULL);
- if (res) {
- parse->priv->drain = FALSE;
- GST_LOG_OBJECT (parse, "valid frame of size %d at pos %d", fsize, skip);
- break;
- }
- parse->priv->drain = FALSE;
- if (skip == -1)
- skip = 1;
- if (skip > 0) {
- GST_LOG_OBJECT (parse, "finding sync, skipping %d bytes", skip);
- if (full && parse->segment.rate < 0.0 && !parse->priv->buffers_queued) {
- /* reverse playback, and no frames found yet, so we are skipping
- * the leading part of a fragment, which may form the tail of
- * fragment coming later, hopefully subclass skips efficiently ... */
- outbuf = gst_buffer_create_sub (buffer, 0, skip);
- parse->priv->buffers_pending =
- g_slist_prepend (parse->priv->buffers_pending, outbuf);
- outbuf = NULL;
- }
- parse->priv->offset += skip;
- if (!parse->priv->discont)
- parse->priv->sync_offset = parse->priv->offset;
- parse->priv->discont = TRUE;
- /* something changed least; nullify loop check */
- old_min_size = 0;
- }
- /* skip == 0 should imply subclass set min_size to need more data;
- * we check this shortly */
- GST_DEBUG_OBJECT (parse, "finding sync...");
- gst_buffer_unref (buffer);
- if ((ret = gst_base_parse_check_sync (parse)) != GST_FLOW_OK) {
- goto done;
- }
- }
-
- /* Does the subclass want to skip too? */
- if (skip > 0)
- parse->priv->offset += skip;
- else if (skip < 0)
- skip = 0;
-
- if (fsize + skip <= GST_BUFFER_SIZE (buffer)) {
- outbuf = gst_buffer_create_sub (buffer, skip, fsize);
- GST_BUFFER_OFFSET (outbuf) = GST_BUFFER_OFFSET (buffer) + skip;
- GST_BUFFER_TIMESTAMP (outbuf) = GST_CLOCK_TIME_NONE;
- gst_buffer_unref (buffer);
- } else {
- gst_buffer_unref (buffer);
- ret = gst_base_parse_pull_range (parse, fsize, &outbuf);
- if (ret != GST_FLOW_OK)
- goto done;
- if (GST_BUFFER_SIZE (outbuf) < fsize) {
- gst_buffer_unref (outbuf);
- ret = GST_FLOW_UNEXPECTED;
- }
- }
-
- parse->priv->offset += fsize;
-
- frame->buffer = outbuf;
-
-done:
- return ret;
-
- /* ERRORS */
-invalid_min:
- {
- GST_ELEMENT_ERROR (parse, STREAM, FAILED, (NULL),
- ("min_size evolution %d -> %d; breaking to avoid looping",
- old_min_size, min_size));
- return GST_FLOW_ERROR;
- }
-}
-
-/**
- * gst_base_parse_loop:
- * @pad: GstPad
- *
- * Loop that is used in pull mode to retrieve data from upstream.
- */
-static void
-gst_base_parse_loop (GstPad * pad)
-{
- GstBaseParse *parse;
- GstBaseParseClass *klass;
- GstFlowReturn ret = GST_FLOW_OK;
- GstBaseParseFrame frame = { 0, };
-
- parse = GST_BASE_PARSE (gst_pad_get_parent (pad));
- klass = GST_BASE_PARSE_GET_CLASS (parse);
-
- /* reverse playback:
- * first fragment (closest to stop time) is handled normally below,
- * then we pull in fragments going backwards */
- if (parse->segment.rate < 0.0) {
- /* check if we jumped back to a previous fragment,
- * which is a post-first fragment */
- if (parse->priv->offset < 0) {
- ret = gst_base_parse_handle_previous_fragment (parse);
- goto done;
- }
- }
-
- ret = gst_base_parse_scan_frame (parse, klass, &frame, TRUE);
- if (ret != GST_FLOW_OK)
- goto done;
-
- /* This always cleans up frame, even if error occurs */
- ret = gst_base_parse_handle_and_push_frame (parse, klass, &frame);
-
- /* eat expected eos signalling past segment in reverse playback */
- if (parse->segment.rate < 0.0 && ret == GST_FLOW_UNEXPECTED &&
- parse->segment.last_stop >= parse->segment.stop) {
- GST_DEBUG_OBJECT (parse, "downstream has reached end of segment");
- /* push what was accumulated during loop run */
- gst_base_parse_process_fragment (parse, TRUE);
- /* force previous fragment */
- parse->priv->offset = -1;
- ret = GST_FLOW_OK;
- }
-
-done:
- if (ret == GST_FLOW_UNEXPECTED)
- goto eos;
- else if (ret != GST_FLOW_OK)
- goto pause;
-
- gst_object_unref (parse);
- return;
-
- /* ERRORS */
-eos:
- {
- ret = GST_FLOW_UNEXPECTED;
- GST_DEBUG_OBJECT (parse, "eos");
- /* fall-through */
- }
-pause:
- {
- gboolean push_eos = FALSE;
-
- GST_DEBUG_OBJECT (parse, "pausing task, reason %s",
- gst_flow_get_name (ret));
- gst_pad_pause_task (parse->sinkpad);
-
- if (ret == GST_FLOW_UNEXPECTED) {
- /* handle end-of-stream/segment */
- if (parse->segment.flags & GST_SEEK_FLAG_SEGMENT) {
- gint64 stop;
-
- if ((stop = parse->segment.stop) == -1)
- stop = parse->segment.duration;
-
- GST_DEBUG_OBJECT (parse, "sending segment_done");
-
- gst_element_post_message
- (GST_ELEMENT_CAST (parse),
- gst_message_new_segment_done (GST_OBJECT_CAST (parse),
- GST_FORMAT_TIME, stop));
- } else {
- /* If we STILL have zero frames processed, fire an error */
- if (parse->priv->framecount == 0) {
- GST_ELEMENT_ERROR (parse, STREAM, WRONG_TYPE,
- ("No valid frames found before end of stream"), (NULL));
- }
- push_eos = TRUE;
- }
- } else if (ret == GST_FLOW_NOT_LINKED || ret < GST_FLOW_UNEXPECTED) {
- /* for fatal errors we post an error message, wrong-state is
- * not fatal because it happens due to flushes and only means
- * that we should stop now. */
- GST_ELEMENT_ERROR (parse, STREAM, FAILED, (NULL),
- ("streaming stopped, reason %s", gst_flow_get_name (ret)));
- push_eos = TRUE;
- }
- if (push_eos) {
- /* newsegment before eos */
- if (parse->pending_segment) {
- gst_pad_push_event (parse->srcpad, parse->pending_segment);
- parse->pending_segment = NULL;
- }
- gst_pad_push_event (parse->srcpad, gst_event_new_eos ());
- }
- gst_object_unref (parse);
- }
-}
-
-
-/**
- * gst_base_parse_sink_activate:
- * @sinkpad: #GstPad to be activated.
- *
- * Returns: TRUE if activation succeeded.
- */
-static gboolean
-gst_base_parse_sink_activate (GstPad * sinkpad)
-{
- GstBaseParse *parse;
- gboolean result = TRUE;
-
- parse = GST_BASE_PARSE (gst_pad_get_parent (sinkpad));
-
- GST_DEBUG_OBJECT (parse, "sink activate");
-
- if (gst_pad_check_pull_range (sinkpad)) {
- GST_DEBUG_OBJECT (parse, "trying to activate in pull mode");
- result = gst_pad_activate_pull (sinkpad, TRUE);
- } else {
- GST_DEBUG_OBJECT (parse, "trying to activate in push mode");
- result = gst_pad_activate_push (sinkpad, TRUE);
- }
-
- GST_DEBUG_OBJECT (parse, "sink activate return %d", result);
- gst_object_unref (parse);
- return result;
-}
-
-
-/**
- * gst_base_parse_activate:
- * @parse: #GstBaseParse.
- * @active: TRUE if element will be activated, FALSE if deactivated.
- *
- * Returns: TRUE if the operation succeeded.
- */
-static gboolean
-gst_base_parse_activate (GstBaseParse * parse, gboolean active)
-{
- GstBaseParseClass *klass;
- gboolean result = FALSE;
-
- GST_DEBUG_OBJECT (parse, "activate %d", active);
-
- klass = GST_BASE_PARSE_GET_CLASS (parse);
-
- if (active) {
- if (parse->priv->pad_mode == GST_ACTIVATE_NONE && klass->start)
- result = klass->start (parse);
- } else {
- /* We must make sure streaming has finished before resetting things
- * and calling the ::stop vfunc */
- GST_PAD_STREAM_LOCK (parse->sinkpad);
- GST_PAD_STREAM_UNLOCK (parse->sinkpad);
-
- if (parse->priv->pad_mode != GST_ACTIVATE_NONE && klass->stop)
- result = klass->stop (parse);
-
- parse->priv->pad_mode = GST_ACTIVATE_NONE;
- }
- GST_DEBUG_OBJECT (parse, "activate return: %d", result);
- return result;
-}
-
-
-/**
- * gst_base_parse_sink_activate_push:
- * @pad: #GstPad to be (de)activated.
- * @active: TRUE when activating, FALSE when deactivating.
- *
- * Returns: TRUE if (de)activation succeeded.
- */
-static gboolean
-gst_base_parse_sink_activate_push (GstPad * pad, gboolean active)
-{
- gboolean result = TRUE;
- GstBaseParse *parse;
-
- parse = GST_BASE_PARSE (gst_pad_get_parent (pad));
-
- GST_DEBUG_OBJECT (parse, "sink activate push %d", active);
-
- result = gst_base_parse_activate (parse, active);
-
- if (result)
- parse->priv->pad_mode = active ? GST_ACTIVATE_PUSH : GST_ACTIVATE_NONE;
-
- GST_DEBUG_OBJECT (parse, "sink activate push return: %d", result);
-
- gst_object_unref (parse);
- return result;
-}
-
-
-/**
- * gst_base_parse_sink_activate_pull:
- * @sinkpad: #GstPad to be (de)activated.
- * @active: TRUE when activating, FALSE when deactivating.
- *
- * Returns: TRUE if (de)activation succeeded.
- */
-static gboolean
-gst_base_parse_sink_activate_pull (GstPad * sinkpad, gboolean active)
-{
- gboolean result = FALSE;
- GstBaseParse *parse;
-
- parse = GST_BASE_PARSE (gst_pad_get_parent (sinkpad));
-
- GST_DEBUG_OBJECT (parse, "activate pull %d", active);
-
- result = gst_base_parse_activate (parse, active);
-
- if (result) {
- if (active) {
- parse->pending_segment = gst_event_new_new_segment (FALSE,
- parse->segment.rate, parse->segment.format,
- parse->segment.start, parse->segment.stop, parse->segment.last_stop);
- result &= gst_pad_start_task (sinkpad,
- (GstTaskFunction) gst_base_parse_loop, sinkpad);
- } else {
- result &= gst_pad_stop_task (sinkpad);
- }
- }
-
- if (result)
- parse->priv->pad_mode = active ? GST_ACTIVATE_PULL : GST_ACTIVATE_NONE;
-
- GST_DEBUG_OBJECT (parse, "sink activate pull return: %d", result);
-
- gst_object_unref (parse);
- return result;
-}
-
-
-/**
- * gst_base_parse_set_duration:
- * @parse: #GstBaseParse.
- * @fmt: #GstFormat.
- * @duration: duration value.
- *
- * Sets the duration of the currently playing media. Subclass can use this
- * when it is able to determine duration and/or notices a change in the media
- * duration. Alternatively, if @interval is non-zero (default), then stream
- * duration is determined based on estimated bitrate, and updated every @interval
- * frames. */
-void
-gst_base_parse_set_duration (GstBaseParse * parse,
- GstFormat fmt, gint64 duration, gint interval)
-{
- g_return_if_fail (parse != NULL);
-
- if (parse->priv->upstream_has_duration) {
- GST_DEBUG_OBJECT (parse, "using upstream duration; discarding update");
- goto exit;
- }
-
- if (duration != parse->priv->duration) {
- GstMessage *m;
-
- m = gst_message_new_duration (GST_OBJECT (parse), fmt, duration);
- gst_element_post_message (GST_ELEMENT (parse), m);
-
- /* TODO: what about duration tag? */
- }
- parse->priv->duration = duration;
- parse->priv->duration_fmt = fmt;
- GST_DEBUG_OBJECT (parse, "set duration: %" G_GINT64_FORMAT, duration);
- if (fmt == GST_FORMAT_TIME && GST_CLOCK_TIME_IS_VALID (duration)) {
- if (interval != 0) {
- GST_DEBUG_OBJECT (parse, "valid duration provided, disabling estimate");
- interval = 0;
- }
- }
- GST_DEBUG_OBJECT (parse, "set update interval: %d", interval);
- parse->priv->update_interval = interval;
-exit:
- return;
-}
-
-/**
- * gst_base_parse_set_seek:
- * @parse: #GstBaseParse.
- * @seek: #GstBaseParseSeekable.
- * @abitrate: average bitrate.
- *
- * Sets whether and how the media is seekable (in time).
- * Also optionally provides average bitrate detected in media (if non-zero),
- * e.g. based on metadata, as it will be posted to the application.
- *
- * By default, announced average bitrate is estimated, and seekability is assumed
- * possible based on estimated bitrate.
- */
-void
-gst_base_parse_set_seek (GstBaseParse * parse,
- GstBaseParseSeekable seek, guint bitrate)
-{
- parse->priv->seekable = seek;
- parse->priv->bitrate = bitrate;
- GST_DEBUG_OBJECT (parse, "seek %d, bitrate %d", seek, bitrate);
-}
-
-
-/**
- * gst_base_parse_set_min_frame_size:
- * @parse: #GstBaseParse.
- * @min_size: Minimum size of the data that this base class should give to
- * subclass.
- *
- * Subclass can use this function to tell the base class that it needs to
- * give at least #min_size buffers.
- */
-void
-gst_base_parse_set_min_frame_size (GstBaseParse * parse, guint min_size)
-{
- g_return_if_fail (parse != NULL);
-
- parse->priv->min_frame_size = min_size;
- GST_LOG_OBJECT (parse, "set frame_min_size: %d", min_size);
-}
-
-/**
- * gst_base_parse_set_format:
- * @parse: the #GstBaseParseFormat to set or unset
- * @flags: format flag to enable or disable
- * @on: whether or not to enable
- *
- * Set flags describing characteristics of parsed format.
- */
-void
-gst_base_parse_set_format (GstBaseParse * parse, GstBaseParseFormat flag,
- gboolean on)
-{
- g_return_if_fail (parse != NULL);
-
- GST_LOG_OBJECT (parse, "set flag %d to %d", flag, on);
- if (on)
- parse->priv->format |= flag;
- else
- parse->priv->format &= ~flag;
-}
-
-/**
- * gst_base_parse_set_frame_props:
- * @parse: the #GstBaseParse to set
- * @fps_num: frames per second (numerator).
- * @fps_den: frames per second (denominator).
- * @lead_in: frames needed before a segment for subsequent decode
- * @lead_out: frames needed after a segment
- *
- * If frames per second is configured, parser can take care of buffer duration
- * and timestamping. When performing segment clipping, or seeking to a specific
- * location, a corresponding decoder might need an initial @lead_in and a
- * following @lead_out number of frames to ensure the desired segment is
- * entirely filled upon decoding.
- */
-void
-gst_base_parse_set_frame_props (GstBaseParse * parse, guint fps_num,
- guint fps_den, guint lead_in, guint lead_out)
-{
- g_return_if_fail (parse != NULL);
-
- parse->priv->fps_num = fps_num;
- parse->priv->fps_den = fps_den;
- if (!fps_num || !fps_den) {
- GST_DEBUG_OBJECT (parse, "invalid fps (%d/%d), ignoring parameters",
- fps_num, fps_den);
- fps_num = fps_den = 0;
- parse->priv->frame_duration = GST_CLOCK_TIME_NONE;
- parse->priv->lead_in = parse->priv->lead_out = 0;
- parse->priv->lead_in_ts = parse->priv->lead_out_ts = 0;
- } else {
- parse->priv->frame_duration =
- gst_util_uint64_scale (GST_SECOND, fps_den, fps_num);
- parse->priv->lead_in = lead_in;
- parse->priv->lead_out = lead_out;
- parse->priv->lead_in_ts =
- gst_util_uint64_scale (GST_SECOND, fps_den * lead_in, fps_num);
- parse->priv->lead_out_ts =
- gst_util_uint64_scale (GST_SECOND, fps_den * lead_out, fps_num);
- /* aim for about 1.5s to estimate duration */
- if (parse->priv->update_interval < 0) {
- parse->priv->update_interval = fps_num * 3 / (fps_den * 2);
- GST_LOG_OBJECT (parse, "estimated update interval to %d frames",
- parse->priv->update_interval);
- }
- }
- GST_LOG_OBJECT (parse, "set fps: %d/%d => duration: %" G_GINT64_FORMAT " ms",
- fps_num, fps_den, parse->priv->frame_duration / GST_MSECOND);
- GST_LOG_OBJECT (parse, "set lead in: %d frames = %" G_GUINT64_FORMAT " ms, "
- "lead out: %d frames = %" G_GUINT64_FORMAT " ms",
- lead_in, parse->priv->lead_in_ts / GST_MSECOND,
- lead_out, parse->priv->lead_out_ts / GST_MSECOND);
-}
-
-static gboolean
-gst_base_parse_get_duration (GstBaseParse * parse, GstFormat format,
- GstClockTime * duration)
-{
- gboolean res = FALSE;
-
- g_return_val_if_fail (duration != NULL, FALSE);
-
- *duration = GST_CLOCK_TIME_NONE;
- if (parse->priv->duration != -1 && format == parse->priv->duration_fmt) {
- GST_LOG_OBJECT (parse, "using provided duration");
- *duration = parse->priv->duration;
- res = TRUE;
- } else if (parse->priv->duration != -1) {
- GST_LOG_OBJECT (parse, "converting provided duration");
- res = gst_base_parse_convert (parse, parse->priv->duration_fmt,
- parse->priv->duration, format, (gint64 *) duration);
- } else if (format == GST_FORMAT_TIME && parse->priv->estimated_duration != -1) {
- GST_LOG_OBJECT (parse, "using estimated duration");
- *duration = parse->priv->estimated_duration;
- res = TRUE;
- }
-
- GST_LOG_OBJECT (parse, "res: %d, duration %" GST_TIME_FORMAT, res,
- GST_TIME_ARGS (*duration));
- return res;
-}
-
-/**
- * gst_base_parse_get_querytypes:
- * @pad: GstPad
- *
- * Returns: A table of #GstQueryType items describing supported query types.
- */
-static const GstQueryType *
-gst_base_parse_get_querytypes (GstPad * pad)
-{
- static const GstQueryType list[] = {
- GST_QUERY_POSITION,
- GST_QUERY_DURATION,
- GST_QUERY_FORMATS,
- GST_QUERY_SEEKING,
- GST_QUERY_CONVERT,
- 0
- };
-
- return list;
-}
-
-
-/**
- * gst_base_parse_query:
- * @pad: #GstPad.
- * @query: #GstQuery.
- *
- * Returns: TRUE on success.
- */
-static gboolean
-gst_base_parse_query (GstPad * pad, GstQuery * query)
-{
- GstBaseParse *parse;
- gboolean res = FALSE;
-
- parse = GST_BASE_PARSE (GST_PAD_PARENT (pad));
-
- GST_LOG_OBJECT (parse, "handling query: %" GST_PTR_FORMAT, query);
-
- switch (GST_QUERY_TYPE (query)) {
- case GST_QUERY_POSITION:
- {
- gint64 dest_value;
- GstFormat format;
-
- GST_DEBUG_OBJECT (parse, "position query");
- gst_query_parse_position (query, &format, NULL);
-
- GST_OBJECT_LOCK (parse);
- if (format == GST_FORMAT_BYTES) {
- dest_value = parse->priv->offset;
- res = TRUE;
- } else if (format == parse->segment.format &&
- GST_CLOCK_TIME_IS_VALID (parse->segment.last_stop)) {
- dest_value = parse->segment.last_stop;
- res = TRUE;
- }
- GST_OBJECT_UNLOCK (parse);
-
- if (res)
- gst_query_set_position (query, format, dest_value);
- else {
- res = gst_pad_query_default (pad, query);
- if (!res) {
- /* no precise result, upstream no idea either, then best estimate */
- /* priv->offset is updated in both PUSH/PULL modes */
- res = gst_base_parse_convert (parse,
- GST_FORMAT_BYTES, parse->priv->offset, format, &dest_value);
- }
- }
- break;
- }
- case GST_QUERY_DURATION:
- {
- GstFormat format;
- GstClockTime duration;
-
- GST_DEBUG_OBJECT (parse, "duration query");
- gst_query_parse_duration (query, &format, NULL);
-
- /* consult upstream */
- res = gst_pad_query_default (pad, query);
-
- /* otherwise best estimate from us */
- if (!res) {
- res = gst_base_parse_get_duration (parse, format, &duration);
- if (res)
- gst_query_set_duration (query, format, duration);
- }
- break;
- }
- case GST_QUERY_SEEKING:
- {
- GstFormat fmt;
- GstClockTime duration = GST_CLOCK_TIME_NONE;
- gboolean seekable = FALSE;
-
- GST_DEBUG_OBJECT (parse, "seeking query");
- gst_query_parse_seeking (query, &fmt, NULL, NULL, NULL);
-
- /* consult upstream */
- res = gst_pad_query_default (pad, query);
-
- /* we may be able to help if in TIME */
- if (fmt == GST_FORMAT_TIME &&
- parse->priv->seekable > GST_BASE_PARSE_SEEK_NONE) {
- gst_query_parse_seeking (query, &fmt, &seekable, NULL, NULL);
- /* already OK if upstream takes care */
- GST_LOG_OBJECT (parse, "upstream handled %d, seekable %d",
- res, seekable);
- if (!(res && seekable)) {
- if (!gst_base_parse_get_duration (parse, GST_FORMAT_TIME, &duration)
- || duration == -1) {
- /* seekable if we still have a chance to get duration later on */
- seekable =
- parse->priv->upstream_seekable && parse->priv->update_interval;
- } else {
- seekable = parse->priv->upstream_seekable;
- GST_LOG_OBJECT (parse, "already determine upstream seekabled: %d",
- seekable);
- }
- gst_query_set_seeking (query, GST_FORMAT_TIME, seekable, 0, duration);
- res = TRUE;
- }
- }
- break;
- }
- case GST_QUERY_FORMATS:
- gst_query_set_formatsv (query, 3, fmtlist);
- res = TRUE;
- break;
- case GST_QUERY_CONVERT:
- {
- GstFormat src_format, dest_format;
- gint64 src_value, dest_value;
-
- gst_query_parse_convert (query, &src_format, &src_value,
- &dest_format, &dest_value);
-
- res = gst_base_parse_convert (parse, src_format, src_value,
- dest_format, &dest_value);
- if (res) {
- gst_query_set_convert (query, src_format, src_value,
- dest_format, dest_value);
- }
- break;
- }
- default:
- res = gst_pad_query_default (pad, query);
- break;
- }
- return res;
-}
-
-/* scans for a cluster start from @pos,
- * return GST_FLOW_OK and frame position/time in @pos/@time if found */
-static GstFlowReturn
-gst_base_parse_find_frame (GstBaseParse * parse, gint64 * pos,
- GstClockTime * time, GstClockTime * duration)
-{
- GstBaseParseClass *klass;
- gint64 orig_offset;
- gboolean orig_drain, orig_discont;
- GstFlowReturn ret = GST_FLOW_OK;
- GstBuffer *buf = NULL;
- GstBaseParseFrame frame = { 0, };
-
- g_return_val_if_fail (GST_FLOW_ERROR, pos != NULL);
- g_return_val_if_fail (GST_FLOW_ERROR, time != NULL);
- g_return_val_if_fail (GST_FLOW_ERROR, duration != NULL);
-
- klass = GST_BASE_PARSE_GET_CLASS (parse);
-
- *time = GST_CLOCK_TIME_NONE;
- *duration = GST_CLOCK_TIME_NONE;
-
- /* save state */
- orig_offset = parse->priv->offset;
- orig_discont = parse->priv->discont;
- orig_drain = parse->priv->drain;
-
- GST_DEBUG_OBJECT (parse, "scanning for frame starting at %" G_GINT64_FORMAT
- " (%#" G_GINT64_MODIFIER "x)", *pos, *pos);
-
- /* jump elsewhere and locate next frame */
- parse->priv->offset = *pos;
- ret = gst_base_parse_scan_frame (parse, klass, &frame, FALSE);
- if (ret != GST_FLOW_OK)
- goto done;
-
- buf = frame.buffer;
- GST_LOG_OBJECT (parse,
- "peek parsing frame at offset %" G_GUINT64_FORMAT
- " (%#" G_GINT64_MODIFIER "x) of size %d",
- GST_BUFFER_OFFSET (buf), GST_BUFFER_OFFSET (buf), GST_BUFFER_SIZE (buf));
-
- /* get offset first, subclass parsing might dump other stuff in there */
- *pos = GST_BUFFER_OFFSET (buf);
- ret = klass->parse_frame (parse, &frame);
- buf = frame.buffer;
-
- /* but it should provide proper time */
- *time = GST_BUFFER_TIMESTAMP (buf);
- *duration = GST_BUFFER_DURATION (buf);
- gst_base_parse_frame_clear (parse, &frame);
-
- GST_LOG_OBJECT (parse,
- "frame with time %" GST_TIME_FORMAT " at offset %" G_GINT64_FORMAT,
- GST_TIME_ARGS (*time), *pos);
-
-done:
- /* restore state */
- parse->priv->offset = orig_offset;
- parse->priv->discont = orig_discont;
- parse->priv->drain = orig_drain;
-
- return ret;
-}
-
-/* bisect and scan through file for frame starting before @time,
- * returns OK and @time/@offset if found, NONE and/or error otherwise
- * If @time == G_MAXINT64, scan for duration ( == last frame) */
-static GstFlowReturn
-gst_base_parse_locate_time (GstBaseParse * parse, GstClockTime * _time,
- gint64 * _offset)
-{
- GstFlowReturn ret = GST_FLOW_OK;
- gint64 lpos, hpos, newpos;
- GstClockTime time, ltime, htime, newtime, dur;
- gboolean cont = TRUE;
- const GstClockTime tolerance = TARGET_DIFFERENCE;
- const guint chunk = 4 * 1024;
-
- g_return_val_if_fail (_time != NULL, GST_FLOW_ERROR);
- g_return_val_if_fail (_offset != NULL, GST_FLOW_ERROR);
-
- /* TODO also make keyframe aware if useful some day */
-
- time = *_time;
-
- /* basic cases */
- if (time == 0) {
- *_offset = 0;
- return GST_FLOW_OK;
- }
-
- if (time == -1) {
- *_offset = -1;
- return GST_FLOW_OK;
- }
-
- /* do not know at first */
- *_offset = -1;
- *_time = GST_CLOCK_TIME_NONE;
-
- /* need initial positions; start and end */
- lpos = parse->priv->first_frame_offset;
- ltime = parse->priv->first_frame_ts;
- htime = parse->priv->duration;
- hpos = parse->priv->upstream_size;
-
- /* check preconditions are satisfied;
- * start and end are needed, except for special case where we scan for
- * last frame to determine duration */
- if (parse->priv->pad_mode != GST_ACTIVATE_PULL || !hpos ||
- !GST_CLOCK_TIME_IS_VALID (ltime) ||
- (!GST_CLOCK_TIME_IS_VALID (htime) && time != G_MAXINT64)) {
- return GST_FLOW_OK;
- }
-
- /* shortcut cases */
- if (time < ltime) {
- goto exit;
- } else if (time < ltime + tolerance) {
- *_offset = lpos;
- *_time = ltime;
- goto exit;
- } else if (time >= htime) {
- *_offset = hpos;
- *_time = htime;
- goto exit;
- }
-
- while (htime > ltime && cont) {
- GST_LOG_OBJECT (parse,
- "lpos: %" G_GUINT64_FORMAT ", ltime: %" GST_TIME_FORMAT, lpos,
- GST_TIME_ARGS (ltime));
- GST_LOG_OBJECT (parse,
- "hpos: %" G_GUINT64_FORMAT ", htime: %" GST_TIME_FORMAT, hpos,
- GST_TIME_ARGS (htime));
- if (G_UNLIKELY (time == G_MAXINT64)) {
- newpos = hpos;
- } else if (G_LIKELY (hpos > lpos)) {
- newpos =
- gst_util_uint64_scale (hpos - lpos, time - ltime, htime - ltime) +
- lpos - chunk;
- } else {
- /* should mean lpos == hpos, since lpos <= hpos is invariant */
- newpos = lpos;
- /* we check this case once, but not forever, so break loop */
- cont = FALSE;
- }
-
- /* ensure */
- newpos = CLAMP (newpos, lpos, hpos);
- GST_LOG_OBJECT (parse,
- "estimated _offset for %" GST_TIME_FORMAT ": %" G_GINT64_FORMAT,
- GST_TIME_ARGS (time), newpos);
-
- ret = gst_base_parse_find_frame (parse, &newpos, &newtime, &dur);
- if (ret == GST_FLOW_UNEXPECTED) {
- /* heuristic HACK */
- hpos = MAX (lpos, hpos - chunk);
- continue;
- } else if (ret != GST_FLOW_OK) {
- goto exit;
- }
-
- if (newtime == -1 || newpos == -1) {
- GST_DEBUG_OBJECT (parse, "subclass did not provide metadata; aborting");
- break;
- }
-
- if (G_UNLIKELY (time == G_MAXINT64)) {
- *_offset = newpos;
- *_time = newtime;
- if (GST_CLOCK_TIME_IS_VALID (dur))
- *_time += dur;
- break;
- } else if (newtime > time) {
- /* overshoot */
- hpos = (newpos >= hpos) ? MAX (lpos, hpos - chunk) : MAX (lpos, newpos);
- htime = newtime;
- } else if (newtime + tolerance > time) {
- /* close enough undershoot */
- *_offset = newpos;
- *_time = newtime;
- break;
- } else if (newtime < ltime) {
- /* so a position beyond lpos resulted in earlier time than ltime ... */
- GST_DEBUG_OBJECT (parse, "non-ascending time; aborting");
- break;
- } else {
- /* undershoot too far */
- newpos += newpos == lpos ? chunk : 0;
- lpos = CLAMP (newpos, lpos, hpos);
- ltime = newtime;
- }
- }
-
-exit:
- GST_LOG_OBJECT (parse, "return offset %" G_GINT64_FORMAT ", time %"
- GST_TIME_FORMAT, *_offset, GST_TIME_ARGS (*_time));
- return ret;
-}
-
-static gint64
-gst_base_parse_find_offset (GstBaseParse * parse, GstClockTime time,
- gboolean before, GstClockTime * _ts)
-{
- gint64 bytes = 0, ts = 0;
- GstIndexEntry *entry = NULL;
-
- if (time == GST_CLOCK_TIME_NONE) {
- ts = time;
- bytes = -1;
- goto exit;
- }
-
- GST_OBJECT_LOCK (parse);
- if (parse->priv->index) {
- /* Let's check if we have an index entry for that time */
- entry = gst_index_get_assoc_entry (parse->priv->index,
- parse->priv->index_id,
- before ? GST_INDEX_LOOKUP_BEFORE : GST_INDEX_LOOKUP_AFTER,
- GST_ASSOCIATION_FLAG_KEY_UNIT, GST_FORMAT_TIME, time);
- }
-
- if (entry) {
- gst_index_entry_assoc_map (entry, GST_FORMAT_BYTES, &bytes);
- gst_index_entry_assoc_map (entry, GST_FORMAT_TIME, &ts);
-
- GST_DEBUG_OBJECT (parse, "found index entry for %" GST_TIME_FORMAT
- " at %" GST_TIME_FORMAT ", offset %" G_GINT64_FORMAT,
- GST_TIME_ARGS (time), GST_TIME_ARGS (ts), bytes);
- } else {
- GST_DEBUG_OBJECT (parse, "no index entry found for %" GST_TIME_FORMAT,
- GST_TIME_ARGS (time));
- if (!before) {
- bytes = -1;
- ts = GST_CLOCK_TIME_NONE;
- }
- }
- GST_OBJECT_UNLOCK (parse);
-
-exit:
- if (_ts)
- *_ts = ts;
-
- return bytes;
-}
-
-
-/**
- * gst_base_parse_handle_seek:
- * @parse: #GstBaseParse.
- * @event: #GstEvent.
- *
- * Returns: TRUE if seek succeeded.
- */
-static gboolean
-gst_base_parse_handle_seek (GstBaseParse * parse, GstEvent * event)
-{
- gdouble rate;
- GstFormat format;
- GstSeekFlags flags;
- GstSeekType cur_type = GST_SEEK_TYPE_NONE, stop_type;
- gboolean flush, update, res = TRUE, accurate;
- gint64 cur, stop, seekpos, seekstop;
- GstSegment seeksegment = { 0, };
- GstFormat dstformat;
- GstClockTime start_ts;
-
- gst_event_parse_seek (event, &rate, &format, &flags,
- &cur_type, &cur, &stop_type, &stop);
-
- GST_DEBUG_OBJECT (parse, "seek to format %s, rate %f, "
- "start type %d at %" GST_TIME_FORMAT ", end type %d at %"
- GST_TIME_FORMAT, gst_format_get_name (format), rate,
- cur_type, GST_TIME_ARGS (cur), stop_type, GST_TIME_ARGS (stop));
-
- /* no negative rates in push mode */
- if (rate < 0.0 && parse->priv->pad_mode == GST_ACTIVATE_PUSH)
- goto negative_rate;
-
- if (cur_type != GST_SEEK_TYPE_SET ||
- (stop_type != GST_SEEK_TYPE_SET && stop_type != GST_SEEK_TYPE_NONE))
- goto wrong_type;
-
- /* For any format other than TIME, see if upstream handles
- * it directly or fail. For TIME, try upstream, but do it ourselves if
- * it fails upstream */
- if (format != GST_FORMAT_TIME) {
- /* default action delegates to upstream */
- res = FALSE;
- goto done;
- } else {
- gst_event_ref (event);
- if ((res = gst_pad_push_event (parse->sinkpad, event))) {
- goto done;
- }
- }
-
- /* get flush flag */
- flush = flags & GST_SEEK_FLAG_FLUSH;
-
- /* copy segment, we need this because we still need the old
- * segment when we close the current segment. */
- memcpy (&seeksegment, &parse->segment, sizeof (GstSegment));
-
- GST_DEBUG_OBJECT (parse, "configuring seek");
- gst_segment_set_seek (&seeksegment, rate, format, flags,
- cur_type, cur, stop_type, stop, &update);
-
- /* accurate seeking implies seek tables are used to obtain position,
- * and the requested segment is maintained exactly, not adjusted any way */
- accurate = flags & GST_SEEK_FLAG_ACCURATE;
-
- /* maybe we can be accurate for (almost) free */
- gst_base_parse_find_offset (parse, seeksegment.last_stop, TRUE, &start_ts);
- if (seeksegment.last_stop <= start_ts + TARGET_DIFFERENCE) {
- GST_DEBUG_OBJECT (parse, "accurate seek possible");
- accurate = TRUE;
- }
- if (accurate) {
- GstClockTime startpos = seeksegment.last_stop;
-
- /* accurate requested, so ... seek a bit before target */
- if (startpos < parse->priv->lead_in_ts)
- startpos = 0;
- else
- startpos -= parse->priv->lead_in_ts;
- seekpos = gst_base_parse_find_offset (parse, startpos, TRUE, &start_ts);
- seekstop = gst_base_parse_find_offset (parse, seeksegment.stop, FALSE,
- NULL);
- } else {
- start_ts = seeksegment.last_stop;
- dstformat = GST_FORMAT_BYTES;
- if (!gst_pad_query_convert (parse->srcpad, format, seeksegment.last_stop,
- &dstformat, &seekpos))
- goto convert_failed;
- if (!gst_pad_query_convert (parse->srcpad, format, seeksegment.stop,
- &dstformat, &seekstop))
- goto convert_failed;
- }
-
- GST_DEBUG_OBJECT (parse,
- "seek position %" G_GINT64_FORMAT " in bytes: %" G_GINT64_FORMAT,
- start_ts, seekpos);
- GST_DEBUG_OBJECT (parse,
- "seek stop %" G_GINT64_FORMAT " in bytes: %" G_GINT64_FORMAT,
- seeksegment.stop, seekstop);
-
- if (parse->priv->pad_mode == GST_ACTIVATE_PULL) {
- gint64 last_stop;
-
- GST_DEBUG_OBJECT (parse, "seek in PULL mode");
-
- if (flush) {
- if (parse->srcpad) {
- GST_DEBUG_OBJECT (parse, "sending flush start");
- gst_pad_push_event (parse->srcpad, gst_event_new_flush_start ());
- /* unlock upstream pull_range */
- gst_pad_push_event (parse->sinkpad, gst_event_new_flush_start ());
- }
- } else {
- gst_pad_pause_task (parse->sinkpad);
- }
-
- /* we should now be able to grab the streaming thread because we stopped it
- * with the above flush/pause code */
- GST_PAD_STREAM_LOCK (parse->sinkpad);
-
- /* save current position */
- last_stop = parse->segment.last_stop;
- GST_DEBUG_OBJECT (parse, "stopped streaming at %" G_GINT64_FORMAT,
- last_stop);
-
- /* now commit to new position */
-
- /* prepare for streaming again */
- if (flush) {
- GST_DEBUG_OBJECT (parse, "sending flush stop");
- gst_pad_push_event (parse->srcpad, gst_event_new_flush_stop ());
- gst_pad_push_event (parse->sinkpad, gst_event_new_flush_stop ());
- gst_base_parse_clear_queues (parse);
- } else {
- if (parse->close_segment)
- gst_event_unref (parse->close_segment);
-
- parse->close_segment = gst_event_new_new_segment (TRUE,
- parse->segment.rate, parse->segment.format,
- parse->segment.accum, parse->segment.last_stop, parse->segment.accum);
-
- /* keep track of our last_stop */
- seeksegment.accum = parse->segment.last_stop;
-
- GST_DEBUG_OBJECT (parse, "Created close seg format %d, "
- "start = %" GST_TIME_FORMAT ", stop = %" GST_TIME_FORMAT
- ", pos = %" GST_TIME_FORMAT, format,
- GST_TIME_ARGS (parse->segment.accum),
- GST_TIME_ARGS (parse->segment.last_stop),
- GST_TIME_ARGS (parse->segment.accum));
- }
-
- memcpy (&parse->segment, &seeksegment, sizeof (GstSegment));
-
- /* store the newsegment event so it can be sent from the streaming thread. */
- if (parse->pending_segment)
- gst_event_unref (parse->pending_segment);
-
- /* This will be sent later in _loop() */
- parse->pending_segment =
- gst_event_new_new_segment (FALSE, parse->segment.rate,
- parse->segment.format, parse->segment.start, parse->segment.stop,
- parse->segment.start);
-
- GST_DEBUG_OBJECT (parse, "Created newseg format %d, "
- "start = %" GST_TIME_FORMAT ", stop = %" GST_TIME_FORMAT
- ", pos = %" GST_TIME_FORMAT, format,
- GST_TIME_ARGS (parse->segment.start),
- GST_TIME_ARGS (parse->segment.stop),
- GST_TIME_ARGS (parse->segment.start));
-
- /* one last chance in pull mode to stay accurate;
- * maybe scan and subclass can find where to go */
- if (!accurate) {
- gint64 scanpos;
- GstClockTime ts = seeksegment.last_stop;
-
- gst_base_parse_locate_time (parse, &ts, &scanpos);
- if (scanpos >= 0) {
- accurate = TRUE;
- seekpos = scanpos;
- /* running collected index now consists of several intervals,
- * so optimized check no longer possible */
- parse->priv->index_last_valid = FALSE;
- parse->priv->index_last_offset = 0;
- parse->priv->index_last_ts = 0;
- }
- }
-
- /* mark discont if we are going to stream from another position. */
- if (seekpos != parse->priv->offset) {
- GST_DEBUG_OBJECT (parse,
- "mark DISCONT, we did a seek to another position");
- parse->priv->offset = seekpos;
- parse->priv->last_offset = seekpos;
- parse->priv->seen_keyframe = FALSE;
- parse->priv->discont = TRUE;
- parse->priv->next_ts = start_ts;
- parse->priv->last_ts = GST_CLOCK_TIME_NONE;
- parse->priv->sync_offset = seekpos;
- parse->priv->exact_position = accurate;
- }
-
- /* Start streaming thread if paused */
- gst_pad_start_task (parse->sinkpad,
- (GstTaskFunction) gst_base_parse_loop, parse->sinkpad);
-
- GST_PAD_STREAM_UNLOCK (parse->sinkpad);
-
- /* handled seek */
- res = TRUE;
- } else {
- GstEvent *new_event;
- GstBaseParseSeek *seek;
-
- /* The only thing we need to do in PUSH-mode is to send the
- seek event (in bytes) to upstream. Segment / flush handling happens
- in corresponding src event handlers */
- GST_DEBUG_OBJECT (parse, "seek in PUSH mode");
- if (seekstop >= 0 && seekpos <= seekpos)
- seekstop = seekpos;
- new_event = gst_event_new_seek (rate, GST_FORMAT_BYTES, flush,
- GST_SEEK_TYPE_SET, seekpos, stop_type, seekstop);
-
- /* store segment info so its precise details can be reconstructed when
- * receiving newsegment;
- * this matters for all details when accurate seeking,
- * is most useful to preserve NONE stop time otherwise */
- seek = g_new0 (GstBaseParseSeek, 1);
- seek->segment = seeksegment;
- seek->accurate = accurate;
- seek->offset = seekpos;
- seek->start_ts = start_ts;
- GST_OBJECT_LOCK (parse);
- /* less optimal, but preserves order */
- parse->priv->pending_seeks =
- g_slist_append (parse->priv->pending_seeks, seek);
- GST_OBJECT_UNLOCK (parse);
-
- res = gst_pad_push_event (parse->sinkpad, new_event);
-
- if (!res) {
- GST_OBJECT_LOCK (parse);
- parse->priv->pending_seeks =
- g_slist_remove (parse->priv->pending_seeks, seek);
- GST_OBJECT_UNLOCK (parse);
- g_free (seek);
- }
- }
-
-done:
- /* handled event is ours to free */
- if (res)
- gst_event_unref (event);
- return res;
-
- /* ERRORS */
-negative_rate:
- {
- GST_DEBUG_OBJECT (parse, "negative playback rates delegated upstream.");
- res = FALSE;
- goto done;
- }
-wrong_type:
- {
- GST_DEBUG_OBJECT (parse, "unsupported seek type.");
- res = FALSE;
- goto done;
- }
-convert_failed:
- {
- GST_DEBUG_OBJECT (parse, "conversion TIME to BYTES failed.");
- res = FALSE;
- goto done;
- }
-}
-
-/**
- * gst_base_parse_handle_tag:
- * @parse: #GstBaseParse.
- * @event: #GstEvent.
- *
- * Checks if bitrates are available from upstream tags so that we don't
- * override them later
- */
-static void
-gst_base_parse_handle_tag (GstBaseParse * parse, GstEvent * event)
-{
- GstTagList *taglist = NULL;
- guint tmp;
-
- gst_event_parse_tag (event, &taglist);
-
- if (gst_tag_list_get_uint (taglist, GST_TAG_MINIMUM_BITRATE, &tmp)) {
- GST_DEBUG_OBJECT (parse, "upstream min bitrate %d", tmp);
- parse->priv->post_min_bitrate = FALSE;
- }
- if (gst_tag_list_get_uint (taglist, GST_TAG_BITRATE, &tmp)) {
- GST_DEBUG_OBJECT (parse, "upstream avg bitrate %d", tmp);
- parse->priv->post_avg_bitrate = FALSE;
- }
- if (gst_tag_list_get_uint (taglist, GST_TAG_MAXIMUM_BITRATE, &tmp)) {
- GST_DEBUG_OBJECT (parse, "upstream max bitrate %d", tmp);
- parse->priv->post_max_bitrate = FALSE;
- }
-}
-
-/**
- * gst_base_parse_sink_setcaps:
- * @pad: #GstPad.
- * @caps: #GstCaps.
- *
- * Returns: TRUE if caps were accepted.
- */
-static gboolean
-gst_base_parse_sink_setcaps (GstPad * pad, GstCaps * caps)
-{
- GstBaseParse *parse;
- GstBaseParseClass *klass;
- gboolean res = TRUE;
-
- parse = GST_BASE_PARSE (GST_PAD_PARENT (pad));
- klass = GST_BASE_PARSE_GET_CLASS (parse);
-
- GST_DEBUG_OBJECT (parse, "caps: %" GST_PTR_FORMAT, caps);
-
- if (klass->set_sink_caps)
- res = klass->set_sink_caps (parse, caps);
-
- return res;
-}
-
-static void
-gst_base_parse_set_index (GstElement * element, GstIndex * index)
-{
- GstBaseParse *parse = GST_BASE_PARSE (element);
-
- GST_OBJECT_LOCK (parse);
- if (parse->priv->index)
- gst_object_unref (parse->priv->index);
- if (index) {
- parse->priv->index = gst_object_ref (index);
- gst_index_get_writer_id (index, GST_OBJECT (element),
- &parse->priv->index_id);
- parse->priv->own_index = FALSE;
- } else
- parse->priv->index = NULL;
- GST_OBJECT_UNLOCK (parse);
-}
-
-static GstIndex *
-gst_base_parse_get_index (GstElement * element)
-{
- GstBaseParse *parse = GST_BASE_PARSE (element);
- GstIndex *result = NULL;
-
- GST_OBJECT_LOCK (parse);
- if (parse->priv->index)
- result = gst_object_ref (parse->priv->index);
- GST_OBJECT_UNLOCK (parse);
-
- return result;
-}
-
-static GstStateChangeReturn
-gst_base_parse_change_state (GstElement * element, GstStateChange transition)
-{
- GstBaseParse *parse;
- GstStateChangeReturn result;
-
- parse = GST_BASE_PARSE (element);
-
- switch (transition) {
- case GST_STATE_CHANGE_READY_TO_PAUSED:
- /* If this is our own index destroy it as the
- * old entries might be wrong for the new stream */
- if (parse->priv->own_index) {
- gst_object_unref (parse->priv->index);
- parse->priv->index = NULL;
- parse->priv->own_index = FALSE;
- }
-
- /* If no index was created, generate one */
- if (G_UNLIKELY (!parse->priv->index)) {
- GST_DEBUG_OBJECT (parse, "no index provided creating our own");
-
- parse->priv->index = gst_index_factory_make ("memindex");
- gst_index_get_writer_id (parse->priv->index, GST_OBJECT (parse),
- &parse->priv->index_id);
- parse->priv->own_index = TRUE;
- }
- break;
- default:
- break;
- }
-
- result = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
-
- switch (transition) {
- case GST_STATE_CHANGE_PAUSED_TO_READY:
- gst_base_parse_reset (parse);
- break;
- default:
- break;
- }
-
- return result;
-}
projects / platform / upstream / gstreamer.git / commitdiff