+++ /dev/null
-/* GStreamer
- * Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
- * 2000,2005 Wim Taymans <wim@fluendo.com>
- *
- * rsnbasesrc.c:
- *
- * 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.
- */
-
-/*
- *
- * This is a temporary copy of RsnBaseSrc/GstPushSrc for the resin
- * DVD components, to work around a deadlock with source elements that
- * send seeks to themselves.
- *
- */
-
-#ifdef HAVE_CONFIG_H
-# include "config.h"
-#endif
-
-#include <stdlib.h>
-#include <string.h>
-
-#include "rsnbasesrc.h"
-#include <gst/base/gsttypefindhelper.h>
-#include <gst/gstmarshal.h>
-#include <gst/gst-i18n-plugin.h>
-
-GST_DEBUG_CATEGORY_STATIC (gst_base_src_debug);
-#define GST_CAT_DEFAULT gst_base_src_debug
-
-#define GST_LIVE_GET_LOCK(elem) (RSN_BASE_SRC_CAST(elem)->live_lock)
-#define GST_LIVE_LOCK(elem) g_mutex_lock(GST_LIVE_GET_LOCK(elem))
-#define GST_LIVE_TRYLOCK(elem) g_mutex_trylock(GST_LIVE_GET_LOCK(elem))
-#define GST_LIVE_UNLOCK(elem) g_mutex_unlock(GST_LIVE_GET_LOCK(elem))
-#define GST_LIVE_GET_COND(elem) (RSN_BASE_SRC_CAST(elem)->live_cond)
-#define GST_LIVE_WAIT(elem) g_cond_wait (GST_LIVE_GET_COND (elem), GST_LIVE_GET_LOCK (elem))
-#define GST_LIVE_TIMED_WAIT(elem, timeval) g_cond_timed_wait (GST_LIVE_GET_COND (elem), GST_LIVE_GET_LOCK (elem),\
- timeval)
-#define GST_LIVE_SIGNAL(elem) g_cond_signal (GST_LIVE_GET_COND (elem));
-#define GST_LIVE_BROADCAST(elem) g_cond_broadcast (GST_LIVE_GET_COND (elem));
-
-/* BaseSrc signals and args */
-enum
-{
- /* FILL ME */
- LAST_SIGNAL
-};
-
-#define DEFAULT_BLOCKSIZE 4096
-#define DEFAULT_NUM_BUFFERS -1
-#define DEFAULT_TYPEFIND FALSE
-#define DEFAULT_DO_TIMESTAMP FALSE
-
-enum
-{
- PROP_0,
- PROP_BLOCKSIZE,
- PROP_NUM_BUFFERS,
- PROP_TYPEFIND,
- PROP_DO_TIMESTAMP
-};
-
-#define RSN_BASE_SRC_GET_PRIVATE(obj) \
- (G_TYPE_INSTANCE_GET_PRIVATE ((obj), RSN_TYPE_BASE_SRC, RsnBaseSrcPrivate))
-
-struct _RsnBaseSrcPrivate
-{
- gboolean last_sent_eos; /* last thing we did was send an EOS (we set this
- * to avoid the sending of two EOS in some cases) */
- gboolean discont;
- gboolean flushing;
-
- /* two segments to be sent in the streaming thread with STREAM_LOCK */
- GstEvent *close_segment;
- GstEvent *start_segment;
-
- /* if EOS is pending (atomic) */
- gint pending_eos;
-
- /* startup latency is the time it takes between going to PLAYING and producing
- * the first BUFFER with running_time 0. This value is included in the latency
- * reporting. */
- GstClockTime latency;
- /* timestamp offset, this is the offset add to the values of gst_times for
- * pseudo live sources */
- GstClockTimeDiff ts_offset;
-
- gboolean do_timestamp;
-
- /* stream sequence number */
- guint32 seqnum;
-
- /* pending tags to be pushed in the data stream */
- GList *pending_tags;
-};
-
-static GstElementClass *parent_class = NULL;
-
-static void gst_base_src_base_init (gpointer g_class);
-static void gst_base_src_class_init (RsnBaseSrcClass * klass);
-static void gst_base_src_init (RsnBaseSrc * src, gpointer g_class);
-static void gst_base_src_finalize (GObject * object);
-
-
-GType
-gst_base_src_get_type (void)
-{
- static volatile gsize base_src_type = 0;
-
- if (g_once_init_enter (&base_src_type)) {
- GType _type;
- static const GTypeInfo base_src_info = {
- sizeof (RsnBaseSrcClass),
- (GBaseInitFunc) gst_base_src_base_init,
- NULL,
- (GClassInitFunc) gst_base_src_class_init,
- NULL,
- NULL,
- sizeof (RsnBaseSrc),
- 0,
- (GInstanceInitFunc) gst_base_src_init,
- };
-
- _type = g_type_register_static (GST_TYPE_ELEMENT,
- "RsnBaseSrc", &base_src_info, G_TYPE_FLAG_ABSTRACT);
- g_once_init_leave (&base_src_type, _type);
- }
- return base_src_type;
-}
-
-static GstCaps *gst_base_src_getcaps (GstPad * pad);
-static gboolean gst_base_src_setcaps (GstPad * pad, GstCaps * caps);
-static void gst_base_src_fixate (GstPad * pad, GstCaps * caps);
-
-static gboolean gst_base_src_activate_push (GstPad * pad, gboolean active);
-static gboolean gst_base_src_activate_pull (GstPad * pad, gboolean active);
-static void gst_base_src_set_property (GObject * object, guint prop_id,
- const GValue * value, GParamSpec * pspec);
-static void gst_base_src_get_property (GObject * object, guint prop_id,
- GValue * value, GParamSpec * pspec);
-static gboolean gst_base_src_event_handler (GstPad * pad, GstEvent * event);
-static gboolean gst_base_src_send_event (GstElement * elem, GstEvent * event);
-static gboolean gst_base_src_default_event (RsnBaseSrc * src, GstEvent * event);
-static const GstQueryType *gst_base_src_get_query_types (GstElement * element);
-
-static gboolean gst_base_src_query (GstPad * pad, GstQuery * query);
-
-static gboolean gst_base_src_default_negotiate (RsnBaseSrc * basesrc);
-static gboolean gst_base_src_default_do_seek (RsnBaseSrc * src,
- GstSegment * segment);
-static gboolean gst_base_src_default_query (RsnBaseSrc * src, GstQuery * query);
-static gboolean gst_base_src_default_prepare_seek_segment (RsnBaseSrc * src,
- GstEvent * event, GstSegment * segment);
-
-static gboolean gst_base_src_set_flushing (RsnBaseSrc * basesrc,
- gboolean flushing, gboolean live_play, gboolean unlock, gboolean * playing);
-static gboolean gst_base_src_start (RsnBaseSrc * basesrc);
-static gboolean gst_base_src_stop (RsnBaseSrc * basesrc);
-
-static GstStateChangeReturn gst_base_src_change_state (GstElement * element,
- GstStateChange transition);
-
-static void gst_base_src_loop (GstPad * pad);
-static gboolean gst_base_src_pad_check_get_range (GstPad * pad);
-static gboolean gst_base_src_default_check_get_range (RsnBaseSrc * bsrc);
-static GstFlowReturn gst_base_src_pad_get_range (GstPad * pad, guint64 offset,
- guint length, GstBuffer ** buf);
-static GstFlowReturn gst_base_src_get_range (RsnBaseSrc * src, guint64 offset,
- guint length, GstBuffer ** buf);
-static gboolean gst_base_src_seekable (RsnBaseSrc * src);
-
-static void
-gst_base_src_base_init (gpointer g_class)
-{
- GST_DEBUG_CATEGORY_INIT (gst_base_src_debug, "basesrc", 0, "basesrc element");
-}
-
-static void
-gst_base_src_class_init (RsnBaseSrcClass * klass)
-{
- GObjectClass *gobject_class;
- GstElementClass *gstelement_class;
-
- gobject_class = G_OBJECT_CLASS (klass);
- gstelement_class = GST_ELEMENT_CLASS (klass);
-
- g_type_class_add_private (klass, sizeof (RsnBaseSrcPrivate));
-
- parent_class = g_type_class_peek_parent (klass);
-
- gobject_class->finalize = gst_base_src_finalize;
- gobject_class->set_property = gst_base_src_set_property;
- gobject_class->get_property = gst_base_src_get_property;
-
- g_object_class_install_property (gobject_class, PROP_BLOCKSIZE,
- g_param_spec_ulong ("blocksize", "Block size",
- "Size in bytes to read per buffer (-1 = default)", 0, G_MAXULONG,
- DEFAULT_BLOCKSIZE, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
- g_object_class_install_property (gobject_class, PROP_NUM_BUFFERS,
- g_param_spec_int ("num-buffers", "num-buffers",
- "Number of buffers to output before sending EOS (-1 = unlimited)",
- -1, G_MAXINT, DEFAULT_NUM_BUFFERS, G_PARAM_READWRITE |
- G_PARAM_STATIC_STRINGS));
- g_object_class_install_property (gobject_class, PROP_TYPEFIND,
- g_param_spec_boolean ("typefind", "Typefind",
- "Run typefind before negotiating", DEFAULT_TYPEFIND,
- G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
- g_object_class_install_property (gobject_class, PROP_DO_TIMESTAMP,
- g_param_spec_boolean ("do-timestamp", "Do timestamp",
- "Apply current stream time to buffers", DEFAULT_DO_TIMESTAMP,
- G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
-
- gstelement_class->change_state =
- GST_DEBUG_FUNCPTR (gst_base_src_change_state);
- gstelement_class->send_event = GST_DEBUG_FUNCPTR (gst_base_src_send_event);
- gstelement_class->get_query_types =
- GST_DEBUG_FUNCPTR (gst_base_src_get_query_types);
-
- klass->negotiate = GST_DEBUG_FUNCPTR (gst_base_src_default_negotiate);
- klass->event = GST_DEBUG_FUNCPTR (gst_base_src_default_event);
- klass->do_seek = GST_DEBUG_FUNCPTR (gst_base_src_default_do_seek);
- klass->query = GST_DEBUG_FUNCPTR (gst_base_src_default_query);
- klass->check_get_range =
- GST_DEBUG_FUNCPTR (gst_base_src_default_check_get_range);
- klass->prepare_seek_segment =
- GST_DEBUG_FUNCPTR (gst_base_src_default_prepare_seek_segment);
-}
-
-static void
-gst_base_src_init (RsnBaseSrc * basesrc, gpointer g_class)
-{
- GstPad *pad;
- GstPadTemplate *pad_template;
-
- basesrc->priv = RSN_BASE_SRC_GET_PRIVATE (basesrc);
-
- basesrc->is_live = FALSE;
- basesrc->live_lock = g_mutex_new ();
- basesrc->live_cond = g_cond_new ();
- basesrc->num_buffers = DEFAULT_NUM_BUFFERS;
- basesrc->num_buffers_left = -1;
-
- basesrc->can_activate_push = TRUE;
- basesrc->pad_mode = GST_ACTIVATE_NONE;
-
- pad_template =
- gst_element_class_get_pad_template (GST_ELEMENT_CLASS (g_class), "src");
- g_return_if_fail (pad_template != NULL);
-
- GST_DEBUG_OBJECT (basesrc, "creating src pad");
- pad = gst_pad_new_from_template (pad_template, "src");
-
- GST_DEBUG_OBJECT (basesrc, "setting functions on src pad");
- gst_pad_set_activatepush_function (pad,
- GST_DEBUG_FUNCPTR (gst_base_src_activate_push));
- gst_pad_set_activatepull_function (pad,
- GST_DEBUG_FUNCPTR (gst_base_src_activate_pull));
- gst_pad_set_event_function (pad,
- GST_DEBUG_FUNCPTR (gst_base_src_event_handler));
- gst_pad_set_query_function (pad, GST_DEBUG_FUNCPTR (gst_base_src_query));
- gst_pad_set_checkgetrange_function (pad,
- GST_DEBUG_FUNCPTR (gst_base_src_pad_check_get_range));
- gst_pad_set_getrange_function (pad,
- GST_DEBUG_FUNCPTR (gst_base_src_pad_get_range));
- gst_pad_set_getcaps_function (pad, GST_DEBUG_FUNCPTR (gst_base_src_getcaps));
- gst_pad_set_setcaps_function (pad, GST_DEBUG_FUNCPTR (gst_base_src_setcaps));
- gst_pad_set_fixatecaps_function (pad,
- GST_DEBUG_FUNCPTR (gst_base_src_fixate));
-
- /* hold pointer to pad */
- basesrc->srcpad = pad;
- GST_DEBUG_OBJECT (basesrc, "adding src pad");
- gst_element_add_pad (GST_ELEMENT (basesrc), pad);
-
- basesrc->blocksize = DEFAULT_BLOCKSIZE;
- basesrc->clock_id = NULL;
- /* we operate in BYTES by default */
- gst_base_src_set_format (basesrc, GST_FORMAT_BYTES);
- basesrc->data.ABI.typefind = DEFAULT_TYPEFIND;
- basesrc->priv->do_timestamp = DEFAULT_DO_TIMESTAMP;
-
- GST_OBJECT_FLAG_UNSET (basesrc, RSN_BASE_SRC_STARTED);
-
- GST_DEBUG_OBJECT (basesrc, "init done");
-}
-
-static void
-gst_base_src_finalize (GObject * object)
-{
- RsnBaseSrc *basesrc;
- GstEvent **event_p;
-
- basesrc = RSN_BASE_SRC (object);
-
- g_mutex_free (basesrc->live_lock);
- g_cond_free (basesrc->live_cond);
-
- event_p = &basesrc->data.ABI.pending_seek;
- gst_event_replace (event_p, NULL);
-
- if (basesrc->priv->pending_tags) {
- g_list_foreach (basesrc->priv->pending_tags, (GFunc) gst_event_unref, NULL);
- g_list_free (basesrc->priv->pending_tags);
- }
-
- G_OBJECT_CLASS (parent_class)->finalize (object);
-}
-
-/**
- * gst_base_src_wait_playing:
- * @src: the src
- *
- * If the #RsnBaseSrcClass::create method performs its own synchronisation against
- * the clock it must unblock when going from PLAYING to the PAUSED state and call
- * this method before continuing to produce the remaining data.
- *
- * This function will block until a state change to PLAYING happens (in which
- * case this function returns #GST_FLOW_OK) or the processing must be stopped due
- * to a state change to READY or a FLUSH event (in which case this function
- * returns #GST_FLOW_WRONG_STATE).
- *
- * Since: 0.10.12
- *
- * Returns: #GST_FLOW_OK if @src is PLAYING and processing can
- * continue. Any other return value should be returned from the create vmethod.
- */
-GstFlowReturn
-gst_base_src_wait_playing (RsnBaseSrc * src)
-{
- g_return_val_if_fail (GST_IS_BASE_SRC (src), GST_FLOW_ERROR);
-
- /* block until the state changes, or we get a flush, or something */
- GST_DEBUG_OBJECT (src, "live source waiting for running state");
- GST_LIVE_WAIT (src);
- if (src->priv->flushing)
- goto flushing;
- GST_DEBUG_OBJECT (src, "live source unlocked");
-
- return GST_FLOW_OK;
-
- /* ERRORS */
-flushing:
- {
- GST_DEBUG_OBJECT (src, "we are flushing");
- return GST_FLOW_WRONG_STATE;
- }
-}
-
-/**
- * gst_base_src_set_live:
- * @src: base source instance
- * @live: new live-mode
- *
- * If the element listens to a live source, @live should
- * be set to %TRUE.
- *
- * A live source will not produce data in the PAUSED state and
- * will therefore not be able to participate in the PREROLL phase
- * of a pipeline. To signal this fact to the application and the
- * pipeline, the state change return value of the live source will
- * be GST_STATE_CHANGE_NO_PREROLL.
- */
-void
-gst_base_src_set_live (RsnBaseSrc * src, gboolean live)
-{
- g_return_if_fail (GST_IS_BASE_SRC (src));
-
- GST_OBJECT_LOCK (src);
- src->is_live = live;
- GST_OBJECT_UNLOCK (src);
-}
-
-/**
- * gst_base_src_is_live:
- * @src: base source instance
- *
- * Check if an element is in live mode.
- *
- * Returns: %TRUE if element is in live mode.
- */
-gboolean
-gst_base_src_is_live (RsnBaseSrc * src)
-{
- gboolean result;
-
- g_return_val_if_fail (GST_IS_BASE_SRC (src), FALSE);
-
- GST_OBJECT_LOCK (src);
- result = src->is_live;
- GST_OBJECT_UNLOCK (src);
-
- return result;
-}
-
-/**
- * gst_base_src_set_format:
- * @src: base source instance
- * @format: the format to use
- *
- * Sets the default format of the source. This will be the format used
- * for sending NEW_SEGMENT events and for performing seeks.
- *
- * If a format of GST_FORMAT_BYTES is set, the element will be able to
- * operate in pull mode if the #RsnBaseSrc::is_seekable returns TRUE.
- *
- * Since: 0.10.1
- */
-void
-gst_base_src_set_format (RsnBaseSrc * src, GstFormat format)
-{
- g_return_if_fail (GST_IS_BASE_SRC (src));
-
- gst_segment_init (&src->segment, format);
-}
-
-/**
- * gst_base_src_query_latency:
- * @src: the source
- * @live: if the source is live
- * @min_latency: the min latency of the source
- * @max_latency: the max latency of the source
- *
- * Query the source for the latency parameters. @live will be TRUE when @src is
- * configured as a live source. @min_latency will be set to the difference
- * between the running time and the timestamp of the first buffer.
- * @max_latency is always the undefined value of -1.
- *
- * This function is mostly used by subclasses.
- *
- * Returns: TRUE if the query succeeded.
- *
- * Since: 0.10.13
- */
-gboolean
-gst_base_src_query_latency (RsnBaseSrc * src, gboolean * live,
- GstClockTime * min_latency, GstClockTime * max_latency)
-{
- GstClockTime min;
-
- g_return_val_if_fail (GST_IS_BASE_SRC (src), FALSE);
-
- GST_OBJECT_LOCK (src);
- if (live)
- *live = src->is_live;
-
- /* if we have a startup latency, report this one, else report 0. Subclasses
- * are supposed to override the query function if they want something
- * else. */
- if (src->priv->latency != -1)
- min = src->priv->latency;
- else
- min = 0;
-
- if (min_latency)
- *min_latency = min;
- if (max_latency)
- *max_latency = -1;
-
- GST_LOG_OBJECT (src, "latency: live %d, min %" GST_TIME_FORMAT
- ", max %" GST_TIME_FORMAT, src->is_live, GST_TIME_ARGS (min),
- GST_TIME_ARGS (-1));
- GST_OBJECT_UNLOCK (src);
-
- return TRUE;
-}
-
-/**
- * gst_base_src_set_blocksize:
- * @src: the source
- * @blocksize: the new blocksize in bytes
- *
- * Set the number of bytes that @src will push out with each buffer. When
- * @blocksize is set to -1, a default length will be used.
- *
- * Since: 0.10.22
- */
-void
-gst_base_src_set_blocksize (RsnBaseSrc * src, gulong blocksize)
-{
- g_return_if_fail (GST_IS_BASE_SRC (src));
-
- GST_OBJECT_LOCK (src);
- src->blocksize = blocksize;
- GST_OBJECT_UNLOCK (src);
-}
-
-/**
- * gst_base_src_get_blocksize:
- * @src: the source
- *
- * Get the number of bytes that @src will push out with each buffer.
- *
- * Returns: the number of bytes pushed with each buffer.
- *
- * Since: 0.10.22
- */
-gulong
-gst_base_src_get_blocksize (RsnBaseSrc * src)
-{
- gulong res;
-
- g_return_val_if_fail (GST_IS_BASE_SRC (src), 0);
-
- GST_OBJECT_LOCK (src);
- res = src->blocksize;
- GST_OBJECT_UNLOCK (src);
-
- return res;
-}
-
-
-/**
- * gst_base_src_set_do_timestamp:
- * @src: the source
- * @timestamp: enable or disable timestamping
- *
- * Configure @src to automatically timestamp outgoing buffers based on the
- * current running_time of the pipeline. This property is mostly useful for live
- * sources.
- *
- * Since: 0.10.15
- */
-void
-gst_base_src_set_do_timestamp (RsnBaseSrc * src, gboolean timestamp)
-{
- g_return_if_fail (GST_IS_BASE_SRC (src));
-
- GST_OBJECT_LOCK (src);
- src->priv->do_timestamp = timestamp;
- GST_OBJECT_UNLOCK (src);
-}
-
-/**
- * gst_base_src_get_do_timestamp:
- * @src: the source
- *
- * Query if @src timestamps outgoing buffers based on the current running_time.
- *
- * Returns: %TRUE if the base class will automatically timestamp outgoing buffers.
- *
- * Since: 0.10.15
- */
-gboolean
-gst_base_src_get_do_timestamp (RsnBaseSrc * src)
-{
- gboolean res;
-
- g_return_val_if_fail (GST_IS_BASE_SRC (src), FALSE);
-
- GST_OBJECT_LOCK (src);
- res = src->priv->do_timestamp;
- GST_OBJECT_UNLOCK (src);
-
- return res;
-}
-
-/**
- * gst_base_src_new_seamless_segment:
- * @src: The source
- * @start: The new start value for the segment
- * @stop: Stop value for the new segment
- * @position: The position value for the new segent
- *
- * Prepare a new seamless segment for emission downstream. This function must
- * only be called by derived sub-classes, and only from the create() function,
- * as the stream-lock needs to be held.
- *
- * The format for the new segment will be the current format of the source, as
- * configured with gst_base_src_set_format()
- *
- * Returns: %TRUE if preparation of the seamless segment succeeded.
- *
- * Since: 0.10.26
- */
-gboolean
-gst_base_src_new_seamless_segment (RsnBaseSrc * src, gint64 start, gint64 stop,
- gint64 position)
-{
- gboolean res = TRUE;
-
- GST_DEBUG_OBJECT (src,
- "Starting new seamless segment. Start %" GST_TIME_FORMAT " stop %"
- GST_TIME_FORMAT " position %" GST_TIME_FORMAT, GST_TIME_ARGS (start),
- GST_TIME_ARGS (stop), GST_TIME_ARGS (position));
-
- if (src->data.ABI.running) {
- if (src->priv->close_segment)
- gst_event_unref (src->priv->close_segment);
- src->priv->close_segment =
- gst_event_new_new_segment_full (TRUE,
- src->segment.rate, src->segment.applied_rate, src->segment.format,
- src->segment.start, src->segment.last_stop, src->segment.time);
- }
-
- gst_segment_set_newsegment_full (&src->segment, FALSE, src->segment.rate,
- src->segment.applied_rate, src->segment.format, start, stop, position);
-
- if (src->priv->start_segment)
- gst_event_unref (src->priv->start_segment);
- if (src->segment.rate >= 0.0) {
- /* forward, we send data from last_stop to stop */
- src->priv->start_segment =
- gst_event_new_new_segment_full (FALSE,
- src->segment.rate, src->segment.applied_rate, src->segment.format,
- src->segment.last_stop, stop, src->segment.time);
- } else {
- /* reverse, we send data from last_stop to start */
- src->priv->start_segment =
- gst_event_new_new_segment_full (FALSE,
- src->segment.rate, src->segment.applied_rate, src->segment.format,
- src->segment.start, src->segment.last_stop, src->segment.time);
- }
-
- src->priv->discont = TRUE;
- src->data.ABI.running = TRUE;
-
- return res;
-}
-
-static gboolean
-gst_base_src_setcaps (GstPad * pad, GstCaps * caps)
-{
- RsnBaseSrcClass *bclass;
- RsnBaseSrc *bsrc;
- gboolean res = TRUE;
-
- bsrc = RSN_BASE_SRC (GST_PAD_PARENT (pad));
- bclass = RSN_BASE_SRC_GET_CLASS (bsrc);
-
- if (bclass->set_caps)
- res = bclass->set_caps (bsrc, caps);
-
- return res;
-}
-
-static GstCaps *
-gst_base_src_getcaps (GstPad * pad)
-{
- RsnBaseSrcClass *bclass;
- RsnBaseSrc *bsrc;
- GstCaps *caps = NULL;
-
- bsrc = RSN_BASE_SRC (GST_PAD_PARENT (pad));
- bclass = RSN_BASE_SRC_GET_CLASS (bsrc);
- if (bclass->get_caps)
- caps = bclass->get_caps (bsrc);
-
- if (caps == NULL) {
- GstPadTemplate *pad_template;
-
- pad_template =
- gst_element_class_get_pad_template (GST_ELEMENT_CLASS (bclass), "src");
- if (pad_template != NULL) {
- caps = gst_caps_ref (gst_pad_template_get_caps (pad_template));
- }
- }
- return caps;
-}
-
-static void
-gst_base_src_fixate (GstPad * pad, GstCaps * caps)
-{
- RsnBaseSrcClass *bclass;
- RsnBaseSrc *bsrc;
-
- bsrc = RSN_BASE_SRC (gst_pad_get_parent (pad));
- bclass = RSN_BASE_SRC_GET_CLASS (bsrc);
-
- if (bclass->fixate)
- bclass->fixate (bsrc, caps);
-
- gst_object_unref (bsrc);
-}
-
-static gboolean
-gst_base_src_default_query (RsnBaseSrc * src, GstQuery * query)
-{
- gboolean res;
-
- switch (GST_QUERY_TYPE (query)) {
- case GST_QUERY_POSITION:
- {
- GstFormat format;
-
- gst_query_parse_position (query, &format, NULL);
- switch (format) {
- case GST_FORMAT_PERCENT:
- {
- gint64 percent;
- gint64 position;
- gint64 duration;
-
- position = src->segment.last_stop;
- duration = src->segment.duration;
-
- if (position != -1 && duration != -1) {
- if (position < duration)
- percent = gst_util_uint64_scale (GST_FORMAT_PERCENT_MAX, position,
- duration);
- else
- percent = GST_FORMAT_PERCENT_MAX;
- } else
- percent = -1;
-
- gst_query_set_position (query, GST_FORMAT_PERCENT, percent);
- res = TRUE;
- break;
- }
- default:
- {
- gint64 position;
-
- position = src->segment.last_stop;
-
- if (position != -1) {
- /* convert to requested format */
- res =
- gst_pad_query_convert (src->srcpad, src->segment.format,
- position, &format, &position);
- } else
- res = TRUE;
-
- gst_query_set_position (query, format, position);
- break;
- }
- }
- break;
- }
- case GST_QUERY_DURATION:
- {
- GstFormat format;
-
- gst_query_parse_duration (query, &format, NULL);
-
- GST_DEBUG_OBJECT (src, "duration query in format %s",
- gst_format_get_name (format));
-
- switch (format) {
- case GST_FORMAT_PERCENT:
- gst_query_set_duration (query, GST_FORMAT_PERCENT,
- GST_FORMAT_PERCENT_MAX);
- res = TRUE;
- break;
- default:
- {
- gint64 duration;
-
- /* this is the duration as configured by the subclass. */
- duration = src->segment.duration;
-
- if (duration != -1) {
- /* convert to requested format, if this fails, we have a duration
- * but we cannot answer the query, we must return FALSE. */
- res =
- gst_pad_query_convert (src->srcpad, src->segment.format,
- duration, &format, &duration);
- } else {
- /* The subclass did not configure a duration, we assume that the
- * media has an unknown duration then and we return TRUE to report
- * this. Note that this is not the same as returning FALSE, which
- * means that we cannot report the duration at all. */
- res = TRUE;
- }
- gst_query_set_duration (query, format, duration);
- break;
- }
- }
- break;
- }
-
- case GST_QUERY_SEEKING:
- {
- GstFormat format;
-
- gst_query_parse_seeking (query, &format, NULL, NULL, NULL);
- if (format == src->segment.format) {
- gst_query_set_seeking (query, src->segment.format,
- gst_base_src_seekable (src), 0, src->segment.duration);
- res = TRUE;
- } else {
- /* FIXME 0.11: return TRUE + seekable=FALSE for SEEKING query here */
- /* Don't reply to the query to make up for demuxers which don't
- * handle the SEEKING query yet. Players like Totem will fall back
- * to the duration when the SEEKING query isn't answered. */
- res = FALSE;
- }
- break;
- }
- case GST_QUERY_SEGMENT:
- {
- gint64 start, stop;
-
- /* no end segment configured, current duration then */
- if ((stop = src->segment.stop) == -1)
- stop = src->segment.duration;
- start = src->segment.start;
-
- /* adjust to stream time */
- if (src->segment.time != -1) {
- start -= src->segment.time;
- if (stop != -1)
- stop -= src->segment.time;
- }
- gst_query_set_segment (query, src->segment.rate, src->segment.format,
- start, stop);
- res = TRUE;
- break;
- }
-
- case GST_QUERY_FORMATS:
- {
- gst_query_set_formats (query, 3, GST_FORMAT_DEFAULT,
- GST_FORMAT_BYTES, GST_FORMAT_PERCENT);
- res = TRUE;
- break;
- }
- case GST_QUERY_CONVERT:
- {
- GstFormat src_fmt, dest_fmt;
- gint64 src_val, dest_val;
-
- gst_query_parse_convert (query, &src_fmt, &src_val, &dest_fmt, &dest_val);
-
- /* we can only convert between equal formats... */
- if (src_fmt == dest_fmt) {
- dest_val = src_val;
- res = TRUE;
- } else
- res = FALSE;
-
- gst_query_set_convert (query, src_fmt, src_val, dest_fmt, dest_val);
- break;
- }
- case GST_QUERY_LATENCY:
- {
- GstClockTime min, max;
- gboolean live;
-
- /* Subclasses should override and implement something usefull */
- res = gst_base_src_query_latency (src, &live, &min, &max);
-
- GST_LOG_OBJECT (src, "report latency: live %d, min %" GST_TIME_FORMAT
- ", max %" GST_TIME_FORMAT, live, GST_TIME_ARGS (min),
- GST_TIME_ARGS (max));
-
- gst_query_set_latency (query, live, min, max);
- break;
- }
- case GST_QUERY_JITTER:
- case GST_QUERY_RATE:
- res = FALSE;
- break;
- case GST_QUERY_BUFFERING:
- {
- GstFormat format;
- gint64 start, stop, estimated;
-
- gst_query_parse_buffering_range (query, &format, NULL, NULL, NULL);
-
- GST_DEBUG_OBJECT (src, "buffering query in format %s",
- gst_format_get_name (format));
-
- if (src->random_access) {
- estimated = 0;
- start = 0;
- if (format == GST_FORMAT_PERCENT)
- stop = GST_FORMAT_PERCENT_MAX;
- else
- stop = src->segment.duration;
- } else {
- estimated = -1;
- start = -1;
- stop = -1;
- }
- /* convert to required format. When the conversion fails, we can't answer
- * the query. When the value is unknown, we can don't perform conversion
- * but report TRUE. */
- if (format != GST_FORMAT_PERCENT && stop != -1) {
- res = gst_pad_query_convert (src->srcpad, src->segment.format,
- stop, &format, &stop);
- } else {
- res = TRUE;
- }
- if (res && format != GST_FORMAT_PERCENT && start != -1)
- res = gst_pad_query_convert (src->srcpad, src->segment.format,
- start, &format, &start);
-
- gst_query_set_buffering_range (query, format, start, stop, estimated);
- break;
- }
- default:
- res = FALSE;
- break;
- }
- GST_DEBUG_OBJECT (src, "query %s returns %d", GST_QUERY_TYPE_NAME (query),
- res);
- return res;
-}
-
-static gboolean
-gst_base_src_query (GstPad * pad, GstQuery * query)
-{
- RsnBaseSrc *src;
- RsnBaseSrcClass *bclass;
- gboolean result = FALSE;
-
- src = RSN_BASE_SRC (gst_pad_get_parent (pad));
-
- bclass = RSN_BASE_SRC_GET_CLASS (src);
-
- if (bclass->query)
- result = bclass->query (src, query);
- else
- result = gst_pad_query_default (pad, query);
-
- gst_object_unref (src);
-
- return result;
-}
-
-static gboolean
-gst_base_src_default_do_seek (RsnBaseSrc * src, GstSegment * segment)
-{
- gboolean res = TRUE;
-
- /* update our offset if the start/stop position was updated */
- if (segment->format == GST_FORMAT_BYTES) {
- segment->time = segment->start;
- } else if (segment->start == 0) {
- /* seek to start, we can implement a default for this. */
- segment->time = 0;
- } else {
- res = FALSE;
- GST_INFO_OBJECT (src, "Can't do a default seek");
- }
-
- return res;
-}
-
-static gboolean
-gst_base_src_do_seek (RsnBaseSrc * src, GstSegment * segment)
-{
- RsnBaseSrcClass *bclass;
- gboolean result = FALSE;
-
- bclass = RSN_BASE_SRC_GET_CLASS (src);
-
- if (bclass->do_seek)
- result = bclass->do_seek (src, segment);
-
- return result;
-}
-
-#define SEEK_TYPE_IS_RELATIVE(t) (((t) != GST_SEEK_TYPE_NONE) && ((t) != GST_SEEK_TYPE_SET))
-
-static gboolean
-gst_base_src_default_prepare_seek_segment (RsnBaseSrc * src, GstEvent * event,
- GstSegment * segment)
-{
- /* By default, we try one of 2 things:
- * - For absolute seek positions, convert the requested position to our
- * configured processing format and place it in the output segment \
- * - For relative seek positions, convert our current (input) values to the
- * seek format, adjust by the relative seek offset and then convert back to
- * the processing format
- */
- GstSeekType cur_type, stop_type;
- gint64 cur, stop;
- GstSeekFlags flags;
- GstFormat seek_format, dest_format;
- gdouble rate;
- gboolean update;
- gboolean res = TRUE;
-
- gst_event_parse_seek (event, &rate, &seek_format, &flags,
- &cur_type, &cur, &stop_type, &stop);
- dest_format = segment->format;
-
- if (seek_format == dest_format) {
- gst_segment_set_seek (segment, rate, seek_format, flags,
- cur_type, cur, stop_type, stop, &update);
- return TRUE;
- }
-
- if (cur_type != GST_SEEK_TYPE_NONE) {
- /* FIXME: Handle seek_cur & seek_end by converting the input segment vals */
- res =
- gst_pad_query_convert (src->srcpad, seek_format, cur, &dest_format,
- &cur);
- cur_type = GST_SEEK_TYPE_SET;
- }
-
- if (res && stop_type != GST_SEEK_TYPE_NONE) {
- /* FIXME: Handle seek_cur & seek_end by converting the input segment vals */
- res =
- gst_pad_query_convert (src->srcpad, seek_format, stop, &dest_format,
- &stop);
- stop_type = GST_SEEK_TYPE_SET;
- }
-
- /* And finally, configure our output segment in the desired format */
- gst_segment_set_seek (segment, rate, dest_format, flags, cur_type, cur,
- stop_type, stop, &update);
-
- if (!res)
- goto no_format;
-
- return res;
-
-no_format:
- {
- GST_DEBUG_OBJECT (src, "undefined format given, seek aborted.");
- return FALSE;
- }
-}
-
-static gboolean
-gst_base_src_prepare_seek_segment (RsnBaseSrc * src, GstEvent * event,
- GstSegment * seeksegment)
-{
- RsnBaseSrcClass *bclass;
- gboolean result = FALSE;
-
- bclass = RSN_BASE_SRC_GET_CLASS (src);
-
- if (bclass->prepare_seek_segment)
- result = bclass->prepare_seek_segment (src, event, seeksegment);
-
- return result;
-}
-
-/* this code implements the seeking. It is a good example
- * handling all cases.
- *
- * A seek updates the currently configured segment.start
- * and segment.stop values based on the SEEK_TYPE. If the
- * segment.start value is updated, a seek to this new position
- * should be performed.
- *
- * The seek can only be executed when we are not currently
- * streaming any data, to make sure that this is the case, we
- * acquire the STREAM_LOCK which is taken when we are in the
- * _loop() function or when a getrange() is called. Normally
- * we will not receive a seek if we are operating in pull mode
- * though. When we operate as a live source we might block on the live
- * cond, which does not release the STREAM_LOCK. Therefore we will try
- * to grab the LIVE_LOCK instead of the STREAM_LOCK to make sure it is
- * safe to perform the seek.
- *
- * When we are in the loop() function, we might be in the middle
- * of pushing a buffer, which might block in a sink. To make sure
- * that the push gets unblocked we push out a FLUSH_START event.
- * Our loop function will get a WRONG_STATE return value from
- * the push and will pause, effectively releasing the STREAM_LOCK.
- *
- * For a non-flushing seek, we pause the task, which might eventually
- * release the STREAM_LOCK. We say eventually because when the sink
- * blocks on the sample we might wait a very long time until the sink
- * unblocks the sample. In any case we acquire the STREAM_LOCK and
- * can continue the seek. A non-flushing seek is normally done in a
- * running pipeline to perform seamless playback, this means that the sink is
- * PLAYING and will return from its chain function.
- * In the case of a non-flushing seek we need to make sure that the
- * data we output after the seek is continuous with the previous data,
- * this is because a non-flushing seek does not reset the running-time
- * to 0. We do this by closing the currently running segment, ie. sending
- * a new_segment event with the stop position set to the last processed
- * position.
- *
- * After updating the segment.start/stop values, we prepare for
- * streaming again. We push out a FLUSH_STOP to make the peer pad
- * accept data again and we start our task again.
- *
- * A segment seek posts a message on the bus saying that the playback
- * of the segment started. We store the segment flag internally because
- * when we reach the segment.stop we have to post a segment.done
- * instead of EOS when doing a segment seek.
- */
-/* FIXME (0.11), we have the unlock gboolean here because most current
- * implementations (fdsrc, -base/gst/tcp/, ...) unconditionally unlock, even when
- * the streaming thread isn't running, resulting in bogus unlocks later when it
- * starts. This is fixed by adding unlock_stop, but we should still avoid unlocking
- * unnecessarily for backwards compatibility. Ergo, the unlock variable stays
- * until 0.11
- */
-static gboolean
-gst_base_src_perform_seek (RsnBaseSrc * src, GstEvent * event, gboolean unlock)
-{
- gboolean res = TRUE, tres;
- gdouble rate;
- GstFormat seek_format, dest_format;
- GstSeekFlags flags;
- GstSeekType cur_type, stop_type;
- gint64 cur, stop;
- gboolean flush, playing;
- gboolean update;
- gboolean relative_seek = FALSE;
- gboolean seekseg_configured = FALSE;
- GstSegment seeksegment;
- guint32 seqnum;
- GstEvent *tevent;
-
- GST_DEBUG_OBJECT (src, "doing seek");
-
- dest_format = src->segment.format;
-
- if (event) {
- gst_event_parse_seek (event, &rate, &seek_format, &flags,
- &cur_type, &cur, &stop_type, &stop);
-
- relative_seek = SEEK_TYPE_IS_RELATIVE (cur_type) ||
- SEEK_TYPE_IS_RELATIVE (stop_type);
-
- if (dest_format != seek_format && !relative_seek) {
- /* If we have an ABSOLUTE position (SEEK_SET only), we can convert it
- * here before taking the stream lock, otherwise we must convert it later,
- * once we have the stream lock and can read the last configures segment
- * start and stop positions */
- gst_segment_init (&seeksegment, dest_format);
-
- if (!gst_base_src_prepare_seek_segment (src, event, &seeksegment))
- goto prepare_failed;
-
- seekseg_configured = TRUE;
- }
-
- flush = flags & GST_SEEK_FLAG_FLUSH;
- seqnum = gst_event_get_seqnum (event);
- } else {
- flush = FALSE;
- /* get next seqnum */
- seqnum = gst_util_seqnum_next ();
- }
-
- /* send flush start */
- if (flush) {
- tevent = gst_event_new_flush_start ();
- gst_event_set_seqnum (tevent, seqnum);
- gst_pad_push_event (src->srcpad, tevent);
- } else
- gst_pad_pause_task (src->srcpad);
-
- /* unblock streaming thread. */
- gst_base_src_set_flushing (src, TRUE, FALSE, unlock, &playing);
-
- /* grab streaming lock, this should eventually be possible, either
- * because the task is paused, our streaming thread stopped
- * or because our peer is flushing. */
- GST_PAD_STREAM_LOCK (src->srcpad);
- if (G_UNLIKELY (src->priv->seqnum == seqnum)) {
- /* we have seen this event before, issue a warning for now */
- GST_WARNING_OBJECT (src, "duplicate event found %" G_GUINT32_FORMAT,
- seqnum);
- } else {
- src->priv->seqnum = seqnum;
- GST_DEBUG_OBJECT (src, "seek with seqnum %" G_GUINT32_FORMAT, seqnum);
- }
-
- gst_base_src_set_flushing (src, FALSE, playing, unlock, NULL);
-
- /* If we configured the seeksegment above, don't overwrite it now. Otherwise
- * copy the current segment info into the temp segment that we can actually
- * attempt the seek with. We only update the real segment if the seek suceeds. */
- if (!seekseg_configured) {
- memcpy (&seeksegment, &src->segment, sizeof (GstSegment));
-
- /* now configure the final seek segment */
- if (event) {
- if (src->segment.format != seek_format) {
- /* OK, here's where we give the subclass a chance to convert the relative
- * seek into an absolute one in the processing format. We set up any
- * absolute seek above, before taking the stream lock. */
- if (!gst_base_src_prepare_seek_segment (src, event, &seeksegment)) {
- GST_DEBUG_OBJECT (src, "Preparing the seek failed after flushing. "
- "Aborting seek");
- res = FALSE;
- }
- } else {
- /* The seek format matches our processing format, no need to ask the
- * the subclass to configure the segment. */
- gst_segment_set_seek (&seeksegment, rate, seek_format, flags,
- cur_type, cur, stop_type, stop, &update);
- }
- }
- /* Else, no seek event passed, so we're just (re)starting the
- current segment. */
- }
-
- if (res) {
- GST_DEBUG_OBJECT (src, "segment configured from %" G_GINT64_FORMAT
- " to %" G_GINT64_FORMAT ", position %" G_GINT64_FORMAT,
- seeksegment.start, seeksegment.stop, seeksegment.last_stop);
-
- /* do the seek, segment.last_stop contains the new position. */
- res = gst_base_src_do_seek (src, &seeksegment);
- }
-
- /* and prepare to continue streaming */
- if (flush) {
- tevent = gst_event_new_flush_stop ();
- gst_event_set_seqnum (tevent, seqnum);
- /* send flush stop, peer will accept data and events again. We
- * are not yet providing data as we still have the STREAM_LOCK. */
- gst_pad_push_event (src->srcpad, tevent);
- } else if (res && src->data.ABI.running) {
- /* we are running the current segment and doing a non-flushing seek,
- * close the segment first based on the last_stop. */
- GST_DEBUG_OBJECT (src, "closing running segment %" G_GINT64_FORMAT
- " to %" G_GINT64_FORMAT, src->segment.start, src->segment.last_stop);
-
- /* queue the segment for sending in the stream thread */
- if (src->priv->close_segment)
- gst_event_unref (src->priv->close_segment);
- src->priv->close_segment =
- gst_event_new_new_segment_full (TRUE,
- src->segment.rate, src->segment.applied_rate, src->segment.format,
- src->segment.start, src->segment.last_stop, src->segment.time);
- gst_event_set_seqnum (src->priv->close_segment, seqnum);
- }
-
- /* The subclass must have converted the segment to the processing format
- * by now */
- if (res && seeksegment.format != dest_format) {
- GST_DEBUG_OBJECT (src, "Subclass failed to prepare a seek segment "
- "in the correct format. Aborting seek.");
- res = FALSE;
- }
-
- /* if successfull seek, we update our real segment and push
- * out the new segment. */
- if (res) {
- memcpy (&src->segment, &seeksegment, sizeof (GstSegment));
-
- if (src->segment.flags & GST_SEEK_FLAG_SEGMENT) {
- GstMessage *message;
-
- message = gst_message_new_segment_start (GST_OBJECT (src),
- src->segment.format, src->segment.last_stop);
- gst_message_set_seqnum (message, seqnum);
-
- gst_element_post_message (GST_ELEMENT (src), message);
- }
-
- /* for deriving a stop position for the playback segment from the seek
- * segment, we must take the duration when the stop is not set */
- if ((stop = src->segment.stop) == -1)
- stop = src->segment.duration;
-
- GST_DEBUG_OBJECT (src, "Sending newsegment from %" G_GINT64_FORMAT
- " to %" G_GINT64_FORMAT, src->segment.start, stop);
-
- /* now replace the old segment so that we send it in the stream thread the
- * next time it is scheduled. */
- if (src->priv->start_segment)
- gst_event_unref (src->priv->start_segment);
- if (src->segment.rate >= 0.0) {
- /* forward, we send data from last_stop to stop */
- src->priv->start_segment =
- gst_event_new_new_segment_full (FALSE,
- src->segment.rate, src->segment.applied_rate, src->segment.format,
- src->segment.last_stop, stop, src->segment.time);
- } else {
- /* reverse, we send data from last_stop to start */
- src->priv->start_segment =
- gst_event_new_new_segment_full (FALSE,
- src->segment.rate, src->segment.applied_rate, src->segment.format,
- src->segment.start, src->segment.last_stop, src->segment.time);
- }
- gst_event_set_seqnum (src->priv->start_segment, seqnum);
- }
-
- src->priv->discont = TRUE;
- src->data.ABI.running = TRUE;
- /* and restart the task in case it got paused explicitely or by
- * the FLUSH_START event we pushed out. */
- tres = gst_pad_start_task (src->srcpad, (GstTaskFunction) gst_base_src_loop,
- src->srcpad);
- if (res && !tres)
- res = FALSE;
-
- /* and release the lock again so we can continue streaming */
- GST_PAD_STREAM_UNLOCK (src->srcpad);
-
- return res;
-
- /* ERROR */
-prepare_failed:
- GST_DEBUG_OBJECT (src, "Preparing the seek failed before flushing. "
- "Aborting seek");
- return FALSE;
-}
-
-static const GstQueryType *
-gst_base_src_get_query_types (GstElement * element)
-{
- static const GstQueryType query_types[] = {
- GST_QUERY_DURATION,
- GST_QUERY_POSITION,
- GST_QUERY_SEEKING,
- GST_QUERY_SEGMENT,
- GST_QUERY_FORMATS,
- GST_QUERY_LATENCY,
- GST_QUERY_JITTER,
- GST_QUERY_RATE,
- GST_QUERY_CONVERT,
- 0
- };
-
- return query_types;
-}
-
-/* all events send to this element directly. This is mainly done from the
- * application.
- */
-static gboolean
-gst_base_src_send_event (GstElement * element, GstEvent * event)
-{
- RsnBaseSrc *src;
- gboolean result = FALSE;
-
- src = RSN_BASE_SRC (element);
-
- GST_DEBUG_OBJECT (src, "reveived %s event", GST_EVENT_TYPE_NAME (event));
-
- switch (GST_EVENT_TYPE (event)) {
- /* bidirectional events */
- case GST_EVENT_FLUSH_START:
- case GST_EVENT_FLUSH_STOP:
- /* sending random flushes downstream can break stuff,
- * especially sync since all segment info will get flushed */
- break;
-
- /* downstream serialized events */
- case GST_EVENT_EOS:
- {
- RsnBaseSrcClass *bclass;
-
- bclass = RSN_BASE_SRC_GET_CLASS (src);
-
- /* queue EOS and make sure the task or pull function performs the EOS
- * actions.
- *
- * We have two possibilities:
- *
- * - Before we are to enter the _create function, we check the pending_eos
- * first and do EOS instead of entering it.
- * - If we are in the _create function or we did not manage to set the
- * flag fast enough and we are about to enter the _create function,
- * we unlock it so that we exit with WRONG_STATE immediatly. We then
- * check the EOS flag and do the EOS logic.
- */
- g_atomic_int_set (&src->priv->pending_eos, TRUE);
- GST_DEBUG_OBJECT (src, "EOS marked, calling unlock");
-
- /* unlock the _create function so that we can check the pending_eos flag
- * and we can do EOS. This will eventually release the LIVE_LOCK again so
- * that we can grab it and stop the unlock again. We don't take the stream
- * lock so that this operation is guaranteed to never block. */
- if (bclass->unlock)
- bclass->unlock (src);
-
- GST_DEBUG_OBJECT (src, "unlock called, waiting for LIVE_LOCK");
-
- GST_LIVE_LOCK (src);
- GST_DEBUG_OBJECT (src, "LIVE_LOCK acquired, calling unlock_stop");
- /* now stop the unlock of the streaming thread again. Grabbing the live
- * lock is enough because that protects the create function. */
- if (bclass->unlock_stop)
- bclass->unlock_stop (src);
- GST_LIVE_UNLOCK (src);
-
- result = TRUE;
- break;
- }
- case GST_EVENT_NEWSEGMENT:
- /* sending random NEWSEGMENT downstream can break sync. */
- break;
- case GST_EVENT_TAG:
- /* Insert tag in the dataflow */
- GST_OBJECT_LOCK (src);
- src->priv->pending_tags = g_list_append (src->priv->pending_tags, event);
- GST_OBJECT_UNLOCK (src);
- event = NULL;
- result = TRUE;
- break;
- case GST_EVENT_BUFFERSIZE:
- /* does not seem to make much sense currently */
- break;
-
- /* upstream events */
- case GST_EVENT_QOS:
- /* elements should override send_event and do something */
- break;
- case GST_EVENT_SEEK:
- {
- gboolean started;
-
- GST_OBJECT_LOCK (src->srcpad);
- if (GST_PAD_ACTIVATE_MODE (src->srcpad) == GST_ACTIVATE_PULL)
- goto wrong_mode;
- started = GST_PAD_ACTIVATE_MODE (src->srcpad) == GST_ACTIVATE_PUSH;
- GST_OBJECT_UNLOCK (src->srcpad);
-
- if (started) {
- GST_DEBUG_OBJECT (src, "performing seek");
- /* when we are running in push mode, we can execute the
- * seek right now, we need to unlock. */
- result = gst_base_src_perform_seek (src, event, TRUE);
- } else {
- GstEvent **event_p;
-
- /* else we store the event and execute the seek when we
- * get activated */
- GST_OBJECT_LOCK (src);
- GST_DEBUG_OBJECT (src, "queueing seek");
- event_p = &src->data.ABI.pending_seek;
- gst_event_replace ((GstEvent **) event_p, event);
- GST_OBJECT_UNLOCK (src);
- /* assume the seek will work */
- result = TRUE;
- }
- break;
- }
- case GST_EVENT_NAVIGATION:
- /* could make sense for elements that do something with navigation events
- * but then they would need to override the send_event function */
- break;
- case GST_EVENT_LATENCY:
- /* does not seem to make sense currently */
- break;
-
- /* custom events */
- case GST_EVENT_CUSTOM_UPSTREAM:
- /* override send_event if you want this */
- break;
- case GST_EVENT_CUSTOM_DOWNSTREAM:
- case GST_EVENT_CUSTOM_BOTH:
- /* FIXME, insert event in the dataflow */
- break;
- case GST_EVENT_CUSTOM_DOWNSTREAM_OOB:
- case GST_EVENT_CUSTOM_BOTH_OOB:
- /* insert a random custom event into the pipeline */
- GST_DEBUG_OBJECT (src, "pushing custom OOB event downstream");
- result = gst_pad_push_event (src->srcpad, event);
- /* we gave away the ref to the event in the push */
- event = NULL;
- break;
- default:
- break;
- }
-done:
- /* if we still have a ref to the event, unref it now */
- if (event)
- gst_event_unref (event);
-
- return result;
-
- /* ERRORS */
-wrong_mode:
- {
- GST_DEBUG_OBJECT (src, "cannot perform seek when operating in pull mode");
- GST_OBJECT_UNLOCK (src->srcpad);
- result = FALSE;
- goto done;
- }
-}
-
-static gboolean
-gst_base_src_seekable (RsnBaseSrc * src)
-{
- RsnBaseSrcClass *bclass;
- bclass = RSN_BASE_SRC_GET_CLASS (src);
- if (bclass->is_seekable)
- return bclass->is_seekable (src);
- else
- return FALSE;
-}
-
-static gboolean
-gst_base_src_default_event (RsnBaseSrc * src, GstEvent * event)
-{
- gboolean result;
-
- switch (GST_EVENT_TYPE (event)) {
- case GST_EVENT_SEEK:
- /* is normally called when in push mode */
- if (!gst_base_src_seekable (src))
- goto not_seekable;
-
- result = gst_base_src_perform_seek (src, event, TRUE);
- break;
- case GST_EVENT_FLUSH_START:
- /* cancel any blocking getrange, is normally called
- * when in pull mode. */
- result = gst_base_src_set_flushing (src, TRUE, FALSE, TRUE, NULL);
- break;
- case GST_EVENT_FLUSH_STOP:
- result = gst_base_src_set_flushing (src, FALSE, TRUE, TRUE, NULL);
- break;
- default:
- result = TRUE;
- break;
- }
- return result;
-
- /* ERRORS */
-not_seekable:
- {
- GST_DEBUG_OBJECT (src, "is not seekable");
- return FALSE;
- }
-}
-
-static gboolean
-gst_base_src_event_handler (GstPad * pad, GstEvent * event)
-{
- RsnBaseSrc *src;
- RsnBaseSrcClass *bclass;
- gboolean result = FALSE;
-
- src = RSN_BASE_SRC (gst_pad_get_parent (pad));
- bclass = RSN_BASE_SRC_GET_CLASS (src);
-
- if (bclass->event) {
- if (!(result = bclass->event (src, event)))
- goto subclass_failed;
- }
-
-done:
- gst_event_unref (event);
- gst_object_unref (src);
-
- return result;
-
- /* ERRORS */
-subclass_failed:
- {
- GST_DEBUG_OBJECT (src, "subclass refused event");
- goto done;
- }
-}
-
-static void
-gst_base_src_set_property (GObject * object, guint prop_id,
- const GValue * value, GParamSpec * pspec)
-{
- RsnBaseSrc *src;
-
- src = RSN_BASE_SRC (object);
-
- switch (prop_id) {
- case PROP_BLOCKSIZE:
- gst_base_src_set_blocksize (src, g_value_get_ulong (value));
- break;
- case PROP_NUM_BUFFERS:
- src->num_buffers = g_value_get_int (value);
- break;
- case PROP_TYPEFIND:
- src->data.ABI.typefind = g_value_get_boolean (value);
- break;
- case PROP_DO_TIMESTAMP:
- gst_base_src_set_do_timestamp (src, g_value_get_boolean (value));
- break;
- default:
- G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
- break;
- }
-}
-
-static void
-gst_base_src_get_property (GObject * object, guint prop_id, GValue * value,
- GParamSpec * pspec)
-{
- RsnBaseSrc *src;
-
- src = RSN_BASE_SRC (object);
-
- switch (prop_id) {
- case PROP_BLOCKSIZE:
- g_value_set_ulong (value, gst_base_src_get_blocksize (src));
- break;
- case PROP_NUM_BUFFERS:
- g_value_set_int (value, src->num_buffers);
- break;
- case PROP_TYPEFIND:
- g_value_set_boolean (value, src->data.ABI.typefind);
- break;
- case PROP_DO_TIMESTAMP:
- g_value_set_boolean (value, gst_base_src_get_do_timestamp (src));
- break;
- default:
- G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
- break;
- }
-}
-
-/* with STREAM_LOCK and LOCK */
-static GstClockReturn
-gst_base_src_wait (RsnBaseSrc * basesrc, GstClock * clock, GstClockTime time)
-{
- GstClockReturn ret;
- GstClockID id;
-
- id = gst_clock_new_single_shot_id (clock, time);
-
- basesrc->clock_id = id;
- /* release the live lock while waiting */
- GST_LIVE_UNLOCK (basesrc);
-
- ret = gst_clock_id_wait (id, NULL);
-
- GST_LIVE_LOCK (basesrc);
- gst_clock_id_unref (id);
- basesrc->clock_id = NULL;
-
- return ret;
-}
-
-/* perform synchronisation on a buffer.
- * with STREAM_LOCK.
- */
-static GstClockReturn
-gst_base_src_do_sync (RsnBaseSrc * basesrc, GstBuffer * buffer)
-{
- GstClockReturn result;
- GstClockTime start, end;
- RsnBaseSrcClass *bclass;
- GstClockTime base_time;
- GstClock *clock;
- GstClockTime now = GST_CLOCK_TIME_NONE, timestamp;
- gboolean do_timestamp, first, pseudo_live;
-
- bclass = RSN_BASE_SRC_GET_CLASS (basesrc);
-
- start = end = -1;
- if (bclass->get_times)
- bclass->get_times (basesrc, buffer, &start, &end);
-
- /* get buffer timestamp */
- timestamp = GST_BUFFER_TIMESTAMP (buffer);
-
- /* grab the lock to prepare for clocking and calculate the startup
- * latency. */
- GST_OBJECT_LOCK (basesrc);
-
- /* if we are asked to sync against the clock we are a pseudo live element */
- pseudo_live = (start != -1 && basesrc->is_live);
- /* check for the first buffer */
- first = (basesrc->priv->latency == -1);
-
- if (timestamp != -1 && pseudo_live) {
- GstClockTime latency;
-
- /* we have a timestamp and a sync time, latency is the diff */
- if (timestamp <= start)
- latency = start - timestamp;
- else
- latency = 0;
-
- if (first) {
- GST_DEBUG_OBJECT (basesrc, "pseudo_live with latency %" GST_TIME_FORMAT,
- GST_TIME_ARGS (latency));
- /* first time we calculate latency, just configure */
- basesrc->priv->latency = latency;
- } else {
- if (basesrc->priv->latency != latency) {
- /* we have a new latency, FIXME post latency message */
- basesrc->priv->latency = latency;
- GST_DEBUG_OBJECT (basesrc, "latency changed to %" GST_TIME_FORMAT,
- GST_TIME_ARGS (latency));
- }
- }
- } else if (first) {
- GST_DEBUG_OBJECT (basesrc, "no latency needed, live %d, sync %d",
- basesrc->is_live, start != -1);
- basesrc->priv->latency = 0;
- }
-
- /* get clock, if no clock, we can't sync or do timestamps */
- if ((clock = GST_ELEMENT_CLOCK (basesrc)) == NULL)
- goto no_clock;
-
- base_time = GST_ELEMENT_CAST (basesrc)->base_time;
-
- do_timestamp = basesrc->priv->do_timestamp;
-
- /* first buffer, calculate the timestamp offset */
- if (first) {
- GstClockTime running_time;
-
- now = gst_clock_get_time (clock);
- running_time = now - base_time;
-
- GST_LOG_OBJECT (basesrc,
- "startup timestamp: %" GST_TIME_FORMAT ", running_time %"
- GST_TIME_FORMAT, GST_TIME_ARGS (timestamp),
- GST_TIME_ARGS (running_time));
-
- if (pseudo_live && timestamp != -1) {
- /* live source and we need to sync, add startup latency to all timestamps
- * to get the real running_time. Live sources should always timestamp
- * according to the current running time. */
- basesrc->priv->ts_offset = GST_CLOCK_DIFF (timestamp, running_time);
-
- GST_LOG_OBJECT (basesrc, "live with sync, ts_offset %" GST_TIME_FORMAT,
- GST_TIME_ARGS (basesrc->priv->ts_offset));
- } else {
- basesrc->priv->ts_offset = 0;
- GST_LOG_OBJECT (basesrc, "no timestamp offset needed");
- }
-
- if (!GST_CLOCK_TIME_IS_VALID (timestamp)) {
- if (do_timestamp)
- timestamp = running_time;
- else
- timestamp = 0;
-
- GST_BUFFER_TIMESTAMP (buffer) = timestamp;
-
- GST_LOG_OBJECT (basesrc, "created timestamp: %" GST_TIME_FORMAT,
- GST_TIME_ARGS (timestamp));
- }
-
- /* add the timestamp offset we need for sync */
- timestamp += basesrc->priv->ts_offset;
- } else {
- /* not the first buffer, the timestamp is the diff between the clock and
- * base_time */
- if (do_timestamp && !GST_CLOCK_TIME_IS_VALID (timestamp)) {
- now = gst_clock_get_time (clock);
-
- GST_BUFFER_TIMESTAMP (buffer) = now - base_time;
-
- GST_LOG_OBJECT (basesrc, "created timestamp: %" GST_TIME_FORMAT,
- GST_TIME_ARGS (now - base_time));
- }
- }
-
- /* if we don't have a buffer timestamp, we don't sync */
- if (!GST_CLOCK_TIME_IS_VALID (start))
- goto no_sync;
-
- if (basesrc->is_live && GST_CLOCK_TIME_IS_VALID (timestamp)) {
- /* for pseudo live sources, add our ts_offset to the timestamp */
- GST_BUFFER_TIMESTAMP (buffer) += basesrc->priv->ts_offset;
- start += basesrc->priv->ts_offset;
- }
-
- GST_LOG_OBJECT (basesrc,
- "waiting for clock, base time %" GST_TIME_FORMAT
- ", stream_start %" GST_TIME_FORMAT,
- GST_TIME_ARGS (base_time), GST_TIME_ARGS (start));
- GST_OBJECT_UNLOCK (basesrc);
-
- result = gst_base_src_wait (basesrc, clock, start + base_time);
-
- GST_LOG_OBJECT (basesrc, "clock entry done: %d", result);
-
- return result;
-
- /* special cases */
-no_clock:
- {
- GST_DEBUG_OBJECT (basesrc, "we have no clock");
- GST_OBJECT_UNLOCK (basesrc);
- return GST_CLOCK_OK;
- }
-no_sync:
- {
- GST_DEBUG_OBJECT (basesrc, "no sync needed");
- GST_OBJECT_UNLOCK (basesrc);
- return GST_CLOCK_OK;
- }
-}
-
-static gboolean
-gst_base_src_update_length (RsnBaseSrc * src, guint64 offset, guint * length)
-{
- guint64 size, maxsize;
- RsnBaseSrcClass *bclass;
-
- bclass = RSN_BASE_SRC_GET_CLASS (src);
-
- /* only operate if we are working with bytes */
- if (src->segment.format != GST_FORMAT_BYTES)
- return TRUE;
-
- /* get total file size */
- size = (guint64) src->segment.duration;
-
- /* the max amount of bytes to read is the total size or
- * up to the segment.stop if present. */
- if (src->segment.stop != -1)
- maxsize = MIN (size, src->segment.stop);
- else
- maxsize = size;
-
- GST_DEBUG_OBJECT (src,
- "reading offset %" G_GUINT64_FORMAT ", length %u, size %" G_GINT64_FORMAT
- ", segment.stop %" G_GINT64_FORMAT ", maxsize %" G_GINT64_FORMAT, offset,
- *length, size, src->segment.stop, maxsize);
-
- /* check size if we have one */
- if (maxsize != -1) {
- /* if we run past the end, check if the file became bigger and
- * retry. */
- if (G_UNLIKELY (offset + *length >= maxsize)) {
- /* see if length of the file changed */
- if (bclass->get_size)
- if (!bclass->get_size (src, &size))
- size = -1;
-
- gst_segment_set_duration (&src->segment, GST_FORMAT_BYTES, size);
-
- /* make sure we don't exceed the configured segment stop
- * if it was set */
- if (src->segment.stop != -1)
- maxsize = MIN (size, src->segment.stop);
- else
- maxsize = size;
-
- /* if we are at or past the end, EOS */
- if (G_UNLIKELY (offset >= maxsize))
- goto unexpected_length;
-
- /* else we can clip to the end */
- if (G_UNLIKELY (offset + *length >= maxsize))
- *length = maxsize - offset;
-
- }
- }
-
- /* keep track of current position. segment is in bytes, we checked
- * that above. */
- gst_segment_set_last_stop (&src->segment, GST_FORMAT_BYTES, offset);
-
- return TRUE;
-
- /* ERRORS */
-unexpected_length:
- {
- return FALSE;
- }
-}
-
-/* must be called with LIVE_LOCK */
-static GstFlowReturn
-gst_base_src_get_range (RsnBaseSrc * src, guint64 offset, guint length,
- GstBuffer ** buf)
-{
- GstFlowReturn ret;
- RsnBaseSrcClass *bclass;
- GstClockReturn status;
-
- bclass = RSN_BASE_SRC_GET_CLASS (src);
-
-again:
- if (src->is_live) {
- while (G_UNLIKELY (!src->live_running)) {
- ret = gst_base_src_wait_playing (src);
- if (ret != GST_FLOW_OK)
- goto stopped;
- }
- }
-
- if (G_UNLIKELY (!GST_OBJECT_FLAG_IS_SET (src, RSN_BASE_SRC_STARTED)))
- goto not_started;
-
- if (G_UNLIKELY (!bclass->create))
- goto no_function;
-
- if (G_UNLIKELY (!gst_base_src_update_length (src, offset, &length)))
- goto unexpected_length;
-
- /* normally we don't count buffers */
- if (G_UNLIKELY (src->num_buffers_left >= 0)) {
- if (src->num_buffers_left == 0)
- goto reached_num_buffers;
- else
- src->num_buffers_left--;
- }
-
- /* don't enter the create function if a pending EOS event was set. For the
- * logic of the pending_eos, check the event function of this class. */
- if (G_UNLIKELY (g_atomic_int_get (&src->priv->pending_eos)))
- goto eos;
-
- GST_DEBUG_OBJECT (src,
- "calling create offset %" G_GUINT64_FORMAT " length %u, time %"
- G_GINT64_FORMAT, offset, length, src->segment.time);
-
- ret = bclass->create (src, offset, length, buf);
-
- /* The create function could be unlocked because we have a pending EOS. It's
- * possible that we have a valid buffer from create that we need to
- * discard when the create function returned _OK. */
- if (G_UNLIKELY (g_atomic_int_get (&src->priv->pending_eos))) {
- if (ret == GST_FLOW_OK) {
- gst_buffer_unref (*buf);
- *buf = NULL;
- }
- goto eos;
- }
-
- if (G_UNLIKELY (ret != GST_FLOW_OK))
- goto not_ok;
-
- /* no timestamp set and we are at offset 0, we can timestamp with 0 */
- if (offset == 0 && src->segment.time == 0
- && GST_BUFFER_TIMESTAMP (*buf) == -1)
- GST_BUFFER_TIMESTAMP (*buf) = 0;
-
- /* set pad caps on the buffer if the buffer had no caps */
- if (GST_BUFFER_CAPS (*buf) == NULL)
- gst_buffer_set_caps (*buf, GST_PAD_CAPS (src->srcpad));
-
- /* now sync before pushing the buffer */
- status = gst_base_src_do_sync (src, *buf);
-
- /* waiting for the clock could have made us flushing */
- if (G_UNLIKELY (src->priv->flushing))
- goto flushing;
-
- switch (status) {
- case GST_CLOCK_EARLY:
- /* the buffer is too late. We currently don't drop the buffer. */
- GST_DEBUG_OBJECT (src, "buffer too late!, returning anyway");
- break;
- case GST_CLOCK_OK:
- /* buffer synchronised properly */
- GST_DEBUG_OBJECT (src, "buffer ok");
- break;
- case GST_CLOCK_UNSCHEDULED:
- /* this case is triggered when we were waiting for the clock and
- * it got unlocked because we did a state change. In any case, get rid of
- * the buffer. */
- gst_buffer_unref (*buf);
- *buf = NULL;
- if (!src->live_running) {
- /* We return WRONG_STATE when we are not running to stop the dataflow also
- * get rid of the produced buffer. */
- GST_DEBUG_OBJECT (src,
- "clock was unscheduled (%d), returning WRONG_STATE", status);
- ret = GST_FLOW_WRONG_STATE;
- } else {
- /* If we are running when this happens, we quickly switched between
- * pause and playing. We try to produce a new buffer */
- GST_DEBUG_OBJECT (src,
- "clock was unscheduled (%d), but we are running", status);
- goto again;
- }
- break;
- default:
- /* all other result values are unexpected and errors */
- GST_ELEMENT_ERROR (src, CORE, CLOCK,
- (_("Internal clock error.")),
- ("clock returned unexpected return value %d", status));
- gst_buffer_unref (*buf);
- *buf = NULL;
- ret = GST_FLOW_ERROR;
- break;
- }
- return ret;
-
- /* ERROR */
-stopped:
- {
- GST_DEBUG_OBJECT (src, "wait_playing returned %d (%s)", ret,
- gst_flow_get_name (ret));
- return ret;
- }
-not_ok:
- {
- GST_DEBUG_OBJECT (src, "create returned %d (%s)", ret,
- gst_flow_get_name (ret));
- return ret;
- }
-not_started:
- {
- GST_DEBUG_OBJECT (src, "getrange but not started");
- return GST_FLOW_WRONG_STATE;
- }
-no_function:
- {
- GST_DEBUG_OBJECT (src, "no create function");
- return GST_FLOW_ERROR;
- }
-unexpected_length:
- {
- GST_DEBUG_OBJECT (src, "unexpected length %u (offset=%" G_GUINT64_FORMAT
- ", size=%" G_GINT64_FORMAT ")", length, offset, src->segment.duration);
- return GST_FLOW_UNEXPECTED;
- }
-reached_num_buffers:
- {
- GST_DEBUG_OBJECT (src, "sent all buffers");
- return GST_FLOW_UNEXPECTED;
- }
-flushing:
- {
- GST_DEBUG_OBJECT (src, "we are flushing");
- gst_buffer_unref (*buf);
- *buf = NULL;
- return GST_FLOW_WRONG_STATE;
- }
-eos:
- {
- GST_DEBUG_OBJECT (src, "we are EOS");
- return GST_FLOW_UNEXPECTED;
- }
-}
-
-static GstFlowReturn
-gst_base_src_pad_get_range (GstPad * pad, guint64 offset, guint length,
- GstBuffer ** buf)
-{
- RsnBaseSrc *src;
- GstFlowReturn res;
-
- src = RSN_BASE_SRC (gst_pad_get_parent (pad));
-
- GST_LIVE_LOCK (src);
- if (G_UNLIKELY (src->priv->flushing))
- goto flushing;
-
- res = gst_base_src_get_range (src, offset, length, buf);
-
-done:
- GST_LIVE_UNLOCK (src);
-
- gst_object_unref (src);
-
- return res;
-
- /* ERRORS */
-flushing:
- {
- GST_DEBUG_OBJECT (src, "we are flushing");
- res = GST_FLOW_WRONG_STATE;
- goto done;
- }
-}
-
-static gboolean
-gst_base_src_default_check_get_range (RsnBaseSrc * src)
-{
- gboolean res;
-
- if (!GST_OBJECT_FLAG_IS_SET (src, RSN_BASE_SRC_STARTED)) {
- GST_LOG_OBJECT (src, "doing start/stop to check get_range support");
- if (G_LIKELY (gst_base_src_start (src)))
- gst_base_src_stop (src);
- }
-
- /* we can operate in getrange mode if the native format is bytes
- * and we are seekable, this condition is set in the random_access
- * flag and is set in the _start() method. */
- res = src->random_access;
-
- return res;
-}
-
-static gboolean
-gst_base_src_check_get_range (RsnBaseSrc * src)
-{
- RsnBaseSrcClass *bclass;
- gboolean res;
-
- bclass = RSN_BASE_SRC_GET_CLASS (src);
-
- if (bclass->check_get_range == NULL)
- goto no_function;
-
- res = bclass->check_get_range (src);
- GST_LOG_OBJECT (src, "%s() returned %d",
- GST_DEBUG_FUNCPTR_NAME (bclass->check_get_range), (gint) res);
-
- return res;
-
- /* ERRORS */
-no_function:
- {
- GST_WARNING_OBJECT (src, "no check_get_range function set");
- return FALSE;
- }
-}
-
-static gboolean
-gst_base_src_pad_check_get_range (GstPad * pad)
-{
- RsnBaseSrc *src;
- gboolean res;
-
- src = RSN_BASE_SRC (GST_OBJECT_PARENT (pad));
-
- res = gst_base_src_check_get_range (src);
-
- return res;
-}
-
-static void
-gst_base_src_loop (GstPad * pad)
-{
- RsnBaseSrc *src;
- GstBuffer *buf = NULL;
- GstFlowReturn ret;
- gint64 position;
- gboolean eos;
- gulong blocksize;
- GList *tags, *tmp;
-
- eos = FALSE;
-
- src = RSN_BASE_SRC (GST_OBJECT_PARENT (pad));
-
- GST_LIVE_LOCK (src);
-
- if (G_UNLIKELY (src->priv->flushing))
- goto flushing;
-
- src->priv->last_sent_eos = FALSE;
-
- blocksize = src->blocksize;
-
- /* if we operate in bytes, we can calculate an offset */
- if (src->segment.format == GST_FORMAT_BYTES) {
- position = src->segment.last_stop;
- /* for negative rates, start with subtracting the blocksize */
- if (src->segment.rate < 0.0) {
- /* we cannot go below segment.start */
- if (position > src->segment.start + blocksize)
- position -= blocksize;
- else {
- /* last block, remainder up to segment.start */
- blocksize = position - src->segment.start;
- position = src->segment.start;
- }
- }
- } else
- position = -1;
-
- GST_LOG_OBJECT (src, "next_ts %" GST_TIME_FORMAT " size %lu",
- GST_TIME_ARGS (position), blocksize);
-
- ret = gst_base_src_get_range (src, position, blocksize, &buf);
- if (G_UNLIKELY (ret != GST_FLOW_OK)) {
- GST_INFO_OBJECT (src, "pausing after gst_base_src_get_range() = %s",
- gst_flow_get_name (ret));
- GST_LIVE_UNLOCK (src);
- goto pause;
- }
- /* this should not happen */
- if (G_UNLIKELY (buf == NULL))
- goto null_buffer;
-
- /* push events to close/start our segment before we push the buffer. */
- if (G_UNLIKELY (src->priv->close_segment)) {
- gst_pad_push_event (pad, src->priv->close_segment);
- src->priv->close_segment = NULL;
- }
- if (G_UNLIKELY (src->priv->start_segment)) {
- gst_pad_push_event (pad, src->priv->start_segment);
- src->priv->start_segment = NULL;
- }
-
- GST_OBJECT_LOCK (src);
- /* take the tags */
- tags = src->priv->pending_tags;
- src->priv->pending_tags = NULL;
- GST_OBJECT_UNLOCK (src);
-
- /* Push out pending tags if any */
- if (G_UNLIKELY (tags != NULL)) {
- for (tmp = tags; tmp; tmp = g_list_next (tmp)) {
- GstEvent *ev = (GstEvent *) tmp->data;
- gst_pad_push_event (pad, ev);
- }
- g_list_free (tags);
- }
-
- /* figure out the new position */
- switch (src->segment.format) {
- case GST_FORMAT_BYTES:
- {
- guint bufsize = GST_BUFFER_SIZE (buf);
-
- /* we subtracted above for negative rates */
- if (src->segment.rate >= 0.0)
- position += bufsize;
- break;
- }
- case GST_FORMAT_TIME:
- {
- GstClockTime start, duration;
-
- start = GST_BUFFER_TIMESTAMP (buf);
- duration = GST_BUFFER_DURATION (buf);
-
- if (GST_CLOCK_TIME_IS_VALID (start))
- position = start;
- else
- position = src->segment.last_stop;
-
- if (GST_CLOCK_TIME_IS_VALID (duration)) {
- if (src->segment.rate >= 0.0)
- position += duration;
- else if (position > duration)
- position -= duration;
- else
- position = 0;
- }
- break;
- }
- case GST_FORMAT_DEFAULT:
- if (src->segment.rate >= 0.0)
- position = GST_BUFFER_OFFSET_END (buf);
- else
- position = GST_BUFFER_OFFSET (buf);
- break;
- default:
- position = -1;
- break;
- }
- if (position != -1) {
- if (src->segment.rate >= 0.0) {
- /* positive rate, check if we reached the stop */
- if (src->segment.stop != -1) {
- if (position >= src->segment.stop) {
- eos = TRUE;
- position = src->segment.stop;
- }
- }
- } else {
- /* negative rate, check if we reached the start. start is always set to
- * something different from -1 */
- if (position <= src->segment.start) {
- eos = TRUE;
- position = src->segment.start;
- }
- /* when going reverse, all buffers are DISCONT */
- src->priv->discont = TRUE;
- }
- gst_segment_set_last_stop (&src->segment, src->segment.format, position);
- }
-
- if (G_UNLIKELY (src->priv->discont)) {
- buf = gst_buffer_make_metadata_writable (buf);
- GST_BUFFER_FLAG_SET (buf, GST_BUFFER_FLAG_DISCONT);
- src->priv->discont = FALSE;
- }
- GST_LIVE_UNLOCK (src);
-
- ret = gst_pad_push (pad, buf);
- if (G_UNLIKELY (ret != GST_FLOW_OK)) {
- GST_INFO_OBJECT (src, "pausing after gst_pad_push() = %s",
- gst_flow_get_name (ret));
- goto pause;
- }
-
- if (G_UNLIKELY (eos)) {
- GST_INFO_OBJECT (src, "pausing after end of segment");
- ret = GST_FLOW_UNEXPECTED;
- goto pause;
- }
-
-done:
- return;
-
- /* special cases */
-flushing:
- {
- GST_DEBUG_OBJECT (src, "we are flushing");
- GST_LIVE_UNLOCK (src);
- ret = GST_FLOW_WRONG_STATE;
- goto pause;
- }
-pause:
- {
- const gchar *reason = gst_flow_get_name (ret);
- GstEvent *event;
-
- GST_DEBUG_OBJECT (src, "pausing task, reason %s", reason);
- src->data.ABI.running = FALSE;
- gst_pad_pause_task (pad);
- if (GST_FLOW_IS_FATAL (ret) || ret == GST_FLOW_NOT_LINKED) {
- if (ret == GST_FLOW_UNEXPECTED) {
- /* perform EOS logic */
- if (src->segment.flags & GST_SEEK_FLAG_SEGMENT) {
- GstMessage *message;
-
- message = gst_message_new_segment_done (GST_OBJECT_CAST (src),
- src->segment.format, src->segment.last_stop);
- gst_message_set_seqnum (message, src->priv->seqnum);
- gst_element_post_message (GST_ELEMENT_CAST (src), message);
- } else {
- event = gst_event_new_eos ();
- gst_event_set_seqnum (event, src->priv->seqnum);
- gst_pad_push_event (pad, event);
- src->priv->last_sent_eos = TRUE;
- }
- } else {
- event = gst_event_new_eos ();
- gst_event_set_seqnum (event, src->priv->seqnum);
- /* for fatal errors we post an error message, post the error
- * first so the app knows about the error first. */
- GST_ELEMENT_ERROR (src, STREAM, FAILED,
- (_("Internal data flow error.")),
- ("streaming task paused, reason %s (%d)", reason, ret));
- gst_pad_push_event (pad, event);
- src->priv->last_sent_eos = TRUE;
- }
- }
- goto done;
- }
-null_buffer:
- {
- GST_ELEMENT_ERROR (src, STREAM, FAILED,
- (_("Internal data flow error.")), ("element returned NULL buffer"));
- GST_LIVE_UNLOCK (src);
- /* we finished the segment on error */
- ret = GST_FLOW_ERROR;
- goto done;
- }
-}
-
-/* default negotiation code.
- *
- * Take intersection between src and sink pads, take first
- * caps and fixate.
- */
-static gboolean
-gst_base_src_default_negotiate (RsnBaseSrc * basesrc)
-{
- GstCaps *thiscaps;
- GstCaps *caps = NULL;
- GstCaps *peercaps = NULL;
- gboolean result = FALSE;
-
- /* first see what is possible on our source pad */
- thiscaps = gst_pad_get_caps (RSN_BASE_SRC_PAD (basesrc));
- GST_DEBUG_OBJECT (basesrc, "caps of src: %" GST_PTR_FORMAT, thiscaps);
- /* nothing or anything is allowed, we're done */
- if (thiscaps == NULL || gst_caps_is_any (thiscaps))
- goto no_nego_needed;
-
- if (G_UNLIKELY (gst_caps_is_empty (thiscaps)))
- goto no_caps;
-
- /* get the peer caps */
- peercaps = gst_pad_peer_get_caps (RSN_BASE_SRC_PAD (basesrc));
- GST_DEBUG_OBJECT (basesrc, "caps of peer: %" GST_PTR_FORMAT, peercaps);
- if (peercaps) {
- GstCaps *icaps;
-
- /* get intersection */
- icaps = gst_caps_intersect (thiscaps, peercaps);
- GST_DEBUG_OBJECT (basesrc, "intersect: %" GST_PTR_FORMAT, icaps);
- gst_caps_unref (thiscaps);
- gst_caps_unref (peercaps);
- if (icaps) {
- /* take first (and best, since they are sorted) possibility */
- caps = gst_caps_copy_nth (icaps, 0);
- gst_caps_unref (icaps);
- }
- } else {
- /* no peer, work with our own caps then */
- caps = thiscaps;
- }
- if (caps) {
- caps = gst_caps_make_writable (caps);
- gst_caps_truncate (caps);
-
- /* now fixate */
- if (!gst_caps_is_empty (caps)) {
- gst_pad_fixate_caps (RSN_BASE_SRC_PAD (basesrc), caps);
- GST_DEBUG_OBJECT (basesrc, "fixated to: %" GST_PTR_FORMAT, caps);
-
- if (gst_caps_is_any (caps)) {
- /* hmm, still anything, so element can do anything and
- * nego is not needed */
- result = TRUE;
- } else if (gst_caps_is_fixed (caps)) {
- /* yay, fixed caps, use those then, it's possible that the subclass does
- * not accept this caps after all and we have to fail. */
- result = gst_pad_set_caps (RSN_BASE_SRC_PAD (basesrc), caps);
- }
- }
- gst_caps_unref (caps);
- } else {
- GST_DEBUG_OBJECT (basesrc, "no common caps");
- }
- return result;
-
-no_nego_needed:
- {
- GST_DEBUG_OBJECT (basesrc, "no negotiation needed");
- if (thiscaps)
- gst_caps_unref (thiscaps);
- return TRUE;
- }
-no_caps:
- {
- GST_ELEMENT_ERROR (basesrc, STREAM, FORMAT,
- ("No supported formats found"),
- ("This element did not produce valid caps"));
- if (thiscaps)
- gst_caps_unref (thiscaps);
- return TRUE;
- }
-}
-
-static gboolean
-gst_base_src_negotiate (RsnBaseSrc * basesrc)
-{
- RsnBaseSrcClass *bclass;
- gboolean result = TRUE;
-
- bclass = RSN_BASE_SRC_GET_CLASS (basesrc);
-
- if (bclass->negotiate)
- result = bclass->negotiate (basesrc);
-
- return result;
-}
-
-static gboolean
-gst_base_src_start (RsnBaseSrc * basesrc)
-{
- RsnBaseSrcClass *bclass;
- gboolean result;
- guint64 size;
- gboolean seekable;
-
- if (GST_OBJECT_FLAG_IS_SET (basesrc, RSN_BASE_SRC_STARTED))
- return TRUE;
-
- GST_DEBUG_OBJECT (basesrc, "starting source");
-
- basesrc->num_buffers_left = basesrc->num_buffers;
-
- gst_segment_init (&basesrc->segment, basesrc->segment.format);
- basesrc->data.ABI.running = FALSE;
-
- bclass = RSN_BASE_SRC_GET_CLASS (basesrc);
- if (bclass->start)
- result = bclass->start (basesrc);
- else
- result = TRUE;
-
- if (!result)
- goto could_not_start;
-
- GST_OBJECT_FLAG_SET (basesrc, RSN_BASE_SRC_STARTED);
-
- /* figure out the size */
- if (basesrc->segment.format == GST_FORMAT_BYTES) {
- if (bclass->get_size) {
- if (!(result = bclass->get_size (basesrc, &size)))
- size = -1;
- } else {
- result = FALSE;
- size = -1;
- }
- GST_DEBUG_OBJECT (basesrc, "setting size %" G_GUINT64_FORMAT, size);
- /* only update the size when operating in bytes, subclass is supposed
- * to set duration in the start method for other formats */
- gst_segment_set_duration (&basesrc->segment, GST_FORMAT_BYTES, size);
- } else {
- size = -1;
- }
-
- GST_DEBUG_OBJECT (basesrc,
- "format: %d, have size: %d, size: %" G_GUINT64_FORMAT ", duration: %"
- G_GINT64_FORMAT, basesrc->segment.format, result, size,
- basesrc->segment.duration);
-
- seekable = gst_base_src_seekable (basesrc);
- GST_DEBUG_OBJECT (basesrc, "is seekable: %d", seekable);
-
- /* update for random access flag */
- basesrc->random_access = seekable &&
- basesrc->segment.format == GST_FORMAT_BYTES;
-
- GST_DEBUG_OBJECT (basesrc, "is random_access: %d", basesrc->random_access);
-
- /* run typefind if we are random_access and the typefinding is enabled. */
- if (basesrc->random_access && basesrc->data.ABI.typefind && size != -1) {
- GstCaps *caps;
-
- if (!(caps = gst_type_find_helper (basesrc->srcpad, size)))
- goto typefind_failed;
-
- result = gst_pad_set_caps (basesrc->srcpad, caps);
- gst_caps_unref (caps);
- } else {
- /* use class or default negotiate function */
- if (!(result = gst_base_src_negotiate (basesrc)))
- goto could_not_negotiate;
- }
-
- return result;
-
- /* ERROR */
-could_not_start:
- {
- GST_DEBUG_OBJECT (basesrc, "could not start");
- /* subclass is supposed to post a message. We don't have to call _stop. */
- return FALSE;
- }
-could_not_negotiate:
- {
- GST_DEBUG_OBJECT (basesrc, "could not negotiate, stopping");
- GST_ELEMENT_ERROR (basesrc, STREAM, FORMAT,
- ("Could not negotiate format"), ("Check your filtered caps, if any"));
- /* we must call stop */
- gst_base_src_stop (basesrc);
- return FALSE;
- }
-typefind_failed:
- {
- GST_DEBUG_OBJECT (basesrc, "could not typefind, stopping");
- GST_ELEMENT_ERROR (basesrc, STREAM, TYPE_NOT_FOUND, (NULL), (NULL));
- /* we must call stop */
- gst_base_src_stop (basesrc);
- return FALSE;
- }
-}
-
-static gboolean
-gst_base_src_stop (RsnBaseSrc * basesrc)
-{
- RsnBaseSrcClass *bclass;
- gboolean result = TRUE;
-
- if (!GST_OBJECT_FLAG_IS_SET (basesrc, RSN_BASE_SRC_STARTED))
- return TRUE;
-
- GST_DEBUG_OBJECT (basesrc, "stopping source");
-
- bclass = RSN_BASE_SRC_GET_CLASS (basesrc);
- if (bclass->stop)
- result = bclass->stop (basesrc);
-
- if (result)
- GST_OBJECT_FLAG_UNSET (basesrc, RSN_BASE_SRC_STARTED);
-
- return result;
-}
-
-/* start or stop flushing dataprocessing
- */
-static gboolean
-gst_base_src_set_flushing (RsnBaseSrc * basesrc,
- gboolean flushing, gboolean live_play, gboolean unlock, gboolean * playing)
-{
- RsnBaseSrcClass *bclass;
-
- bclass = RSN_BASE_SRC_GET_CLASS (basesrc);
-
- if (flushing && unlock) {
- /* unlock any subclasses, we need to do this before grabbing the
- * LIVE_LOCK since we hold this lock before going into ::create. We pass an
- * unlock to the params because of backwards compat (see seek handler)*/
- if (bclass->unlock)
- bclass->unlock (basesrc);
- }
-
- /* the live lock is released when we are blocked, waiting for playing or
- * when we sync to the clock. */
- GST_LIVE_LOCK (basesrc);
- if (playing)
- *playing = basesrc->live_running;
- basesrc->priv->flushing = flushing;
- if (flushing) {
- /* if we are locked in the live lock, signal it to make it flush */
- basesrc->live_running = TRUE;
-
- /* clear pending EOS if any */
- g_atomic_int_set (&basesrc->priv->pending_eos, FALSE);
-
- /* step 1, now that we have the LIVE lock, clear our unlock request */
- if (bclass->unlock_stop)
- bclass->unlock_stop (basesrc);
-
- /* step 2, unblock clock sync (if any) or any other blocking thing */
- if (basesrc->clock_id)
- gst_clock_id_unschedule (basesrc->clock_id);
- } else {
- /* signal the live source that it can start playing */
- basesrc->live_running = live_play;
- }
- GST_LIVE_SIGNAL (basesrc);
- GST_LIVE_UNLOCK (basesrc);
-
- return TRUE;
-}
-
-/* the purpose of this function is to make sure that a live source blocks in the
- * LIVE lock or leaves the LIVE lock and continues playing. */
-static gboolean
-gst_base_src_set_playing (RsnBaseSrc * basesrc, gboolean live_play)
-{
- RsnBaseSrcClass *bclass;
-
- bclass = RSN_BASE_SRC_GET_CLASS (basesrc);
-
- /* unlock subclasses locked in ::create, we only do this when we stop playing. */
- if (!live_play) {
- GST_DEBUG_OBJECT (basesrc, "unlock");
- if (bclass->unlock)
- bclass->unlock (basesrc);
- }
-
- /* we are now able to grab the LIVE lock, when we get it, we can be
- * waiting for PLAYING while blocked in the LIVE cond or we can be waiting
- * for the clock. */
- GST_LIVE_LOCK (basesrc);
- GST_DEBUG_OBJECT (basesrc, "unschedule clock");
-
- /* unblock clock sync (if any) */
- if (basesrc->clock_id)
- gst_clock_id_unschedule (basesrc->clock_id);
-
- /* configure what to do when we get to the LIVE lock. */
- GST_DEBUG_OBJECT (basesrc, "live running %d", live_play);
- basesrc->live_running = live_play;
-
- if (live_play) {
- gboolean start;
-
- /* clear our unlock request when going to PLAYING */
- GST_DEBUG_OBJECT (basesrc, "unlock stop");
- if (bclass->unlock_stop)
- bclass->unlock_stop (basesrc);
-
- /* for live sources we restart the timestamp correction */
- basesrc->priv->latency = -1;
- /* have to restart the task in case it stopped because of the unlock when
- * we went to PAUSED. Only do this if we operating in push mode. */
- GST_OBJECT_LOCK (basesrc->srcpad);
- start = (GST_PAD_ACTIVATE_MODE (basesrc->srcpad) == GST_ACTIVATE_PUSH);
- GST_OBJECT_UNLOCK (basesrc->srcpad);
- if (start)
- gst_pad_start_task (basesrc->srcpad, (GstTaskFunction) gst_base_src_loop,
- basesrc->srcpad);
- GST_DEBUG_OBJECT (basesrc, "signal");
- GST_LIVE_SIGNAL (basesrc);
- }
- GST_LIVE_UNLOCK (basesrc);
-
- return TRUE;
-}
-
-static gboolean
-gst_base_src_activate_push (GstPad * pad, gboolean active)
-{
- RsnBaseSrc *basesrc;
- GstEvent *event;
-
- basesrc = RSN_BASE_SRC (GST_OBJECT_PARENT (pad));
-
- /* prepare subclass first */
- if (active) {
- GST_DEBUG_OBJECT (basesrc, "Activating in push mode");
-
- if (G_UNLIKELY (!basesrc->can_activate_push))
- goto no_push_activation;
-
- if (G_UNLIKELY (!gst_base_src_start (basesrc)))
- goto error_start;
-
- basesrc->priv->last_sent_eos = FALSE;
- basesrc->priv->discont = TRUE;
- gst_base_src_set_flushing (basesrc, FALSE, FALSE, FALSE, NULL);
-
- /* do initial seek, which will start the task */
- GST_OBJECT_LOCK (basesrc);
- event = basesrc->data.ABI.pending_seek;
- basesrc->data.ABI.pending_seek = NULL;
- GST_OBJECT_UNLOCK (basesrc);
-
- /* no need to unlock anything, the task is certainly
- * not running here. The perform seek code will start the task when
- * finished. */
- if (G_UNLIKELY (!gst_base_src_perform_seek (basesrc, event, FALSE)))
- goto seek_failed;
-
- if (event)
- gst_event_unref (event);
- } else {
- GST_DEBUG_OBJECT (basesrc, "Deactivating in push mode");
- /* flush all */
- gst_base_src_set_flushing (basesrc, TRUE, FALSE, TRUE, NULL);
- /* stop the task */
- gst_pad_stop_task (pad);
- /* now we can stop the source */
- if (G_UNLIKELY (!gst_base_src_stop (basesrc)))
- goto error_stop;
- }
- return TRUE;
-
- /* ERRORS */
-no_push_activation:
- {
- GST_WARNING_OBJECT (basesrc, "Subclass disabled push-mode activation");
- return FALSE;
- }
-error_start:
- {
- GST_WARNING_OBJECT (basesrc, "Failed to start in push mode");
- return FALSE;
- }
-seek_failed:
- {
- GST_ERROR_OBJECT (basesrc, "Failed to perform initial seek");
- gst_base_src_stop (basesrc);
- if (event)
- gst_event_unref (event);
- return FALSE;
- }
-error_stop:
- {
- GST_DEBUG_OBJECT (basesrc, "Failed to stop in push mode");
- return FALSE;
- }
-}
-
-static gboolean
-gst_base_src_activate_pull (GstPad * pad, gboolean active)
-{
- RsnBaseSrc *basesrc;
-
- basesrc = RSN_BASE_SRC (GST_OBJECT_PARENT (pad));
-
- /* prepare subclass first */
- if (active) {
- GST_DEBUG_OBJECT (basesrc, "Activating in pull mode");
- if (G_UNLIKELY (!gst_base_src_start (basesrc)))
- goto error_start;
-
- /* if not random_access, we cannot operate in pull mode for now */
- if (G_UNLIKELY (!gst_base_src_check_get_range (basesrc)))
- goto no_get_range;
-
- /* stop flushing now but for live sources, still block in the LIVE lock when
- * we are not yet PLAYING */
- gst_base_src_set_flushing (basesrc, FALSE, FALSE, FALSE, NULL);
- } else {
- GST_DEBUG_OBJECT (basesrc, "Deactivating in pull mode");
- /* flush all, there is no task to stop */
- gst_base_src_set_flushing (basesrc, TRUE, FALSE, TRUE, NULL);
-
- /* don't send EOS when going from PAUSED => READY when in pull mode */
- basesrc->priv->last_sent_eos = TRUE;
-
- if (G_UNLIKELY (!gst_base_src_stop (basesrc)))
- goto error_stop;
- }
- return TRUE;
-
- /* ERRORS */
-error_start:
- {
- GST_ERROR_OBJECT (basesrc, "Failed to start in pull mode");
- return FALSE;
- }
-no_get_range:
- {
- GST_ERROR_OBJECT (basesrc, "Cannot operate in pull mode, stopping");
- gst_base_src_stop (basesrc);
- return FALSE;
- }
-error_stop:
- {
- GST_ERROR_OBJECT (basesrc, "Failed to stop in pull mode");
- return FALSE;
- }
-}
-
-static GstStateChangeReturn
-gst_base_src_change_state (GstElement * element, GstStateChange transition)
-{
- RsnBaseSrc *basesrc;
- GstStateChangeReturn result;
- gboolean no_preroll = FALSE;
-
- basesrc = RSN_BASE_SRC (element);
-
- switch (transition) {
- case GST_STATE_CHANGE_NULL_TO_READY:
- break;
- case GST_STATE_CHANGE_READY_TO_PAUSED:
- no_preroll = gst_base_src_is_live (basesrc);
- break;
- case GST_STATE_CHANGE_PAUSED_TO_PLAYING:
- GST_DEBUG_OBJECT (basesrc, "PAUSED->PLAYING");
- if (gst_base_src_is_live (basesrc)) {
- /* now we can start playback */
- gst_base_src_set_playing (basesrc, TRUE);
- }
- break;
- default:
- break;
- }
-
- if ((result =
- GST_ELEMENT_CLASS (parent_class)->change_state (element,
- transition)) == GST_STATE_CHANGE_FAILURE)
- goto failure;
-
- switch (transition) {
- case GST_STATE_CHANGE_PLAYING_TO_PAUSED:
- GST_DEBUG_OBJECT (basesrc, "PLAYING->PAUSED");
- if (gst_base_src_is_live (basesrc)) {
- /* make sure we block in the live lock in PAUSED */
- gst_base_src_set_playing (basesrc, FALSE);
- no_preroll = TRUE;
- }
- break;
- case GST_STATE_CHANGE_PAUSED_TO_READY:
- {
- GstEvent **event_p, *event;
-
- /* we don't need to unblock anything here, the pad deactivation code
- * already did this */
-
- /* FIXME, deprecate this behaviour, it is very dangerous.
- * the prefered way of sending EOS downstream is by sending
- * the EOS event to the element */
- if (!basesrc->priv->last_sent_eos) {
- GST_DEBUG_OBJECT (basesrc, "Sending EOS event");
- event = gst_event_new_eos ();
- gst_event_set_seqnum (event, basesrc->priv->seqnum);
- gst_pad_push_event (basesrc->srcpad, event);
- basesrc->priv->last_sent_eos = TRUE;
- }
- g_atomic_int_set (&basesrc->priv->pending_eos, FALSE);
- event_p = &basesrc->data.ABI.pending_seek;
- gst_event_replace (event_p, NULL);
- event_p = &basesrc->priv->close_segment;
- gst_event_replace (event_p, NULL);
- event_p = &basesrc->priv->start_segment;
- gst_event_replace (event_p, NULL);
- break;
- }
- case GST_STATE_CHANGE_READY_TO_NULL:
- break;
- default:
- break;
- }
-
- if (no_preroll && result == GST_STATE_CHANGE_SUCCESS)
- result = GST_STATE_CHANGE_NO_PREROLL;
-
- return result;
-
- /* ERRORS */
-failure:
- {
- GST_DEBUG_OBJECT (basesrc, "parent failed state change");
- return result;
- }
-}
projects / platform / upstream / gstreamer.git / commitdiff