+++ /dev/null
-/* GStreamer Base Class for Tag Demuxing
- * Copyright (C) 2005 Jan Schmidt <thaytan@mad.scientist.com>
- * Copyright (C) 2006 Tim-Philipp Müller <tim centricular net>
- *
- * 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:gsttagdemux
- * @see_also: GstApeDemux
- * @short_description: Base class for demuxing tags that are in chunks
- * directly at the beginning or at the end of a file
- *
- * <refsect2>
- * <para>
- * Provides a base class for demuxing tags at the beginning or end of a
- * stream and handles things like typefinding, querying, seeking, and
- * different modes of operation (chain-based, pull_range-based, and providing
- * downstream elements with random access if upstream supports that). The tag
- * is stripped from the output, and all offsets are adjusted for the tag
- * sizes, so that to the downstream element the stream will appear as if
- * there was no tag at all. Also, once the tag has been parsed, GstTagDemux
- * will try to determine the media type of the resulting stream and add a
- * source pad with the appropriate caps in order to facilitate auto-plugging.
- * </para>
- * <title>Deriving from GstTagDemux</title>
- * <para>
- * Subclasses have to do four things:
- * <itemizedlist>
- * <listitem><para>
- * In their base init function, they must add a pad template for the sink
- * pad to the element class, describing the media type they can parse in
- * the caps of the pad template.
- * </para></listitem>
- * <listitem><para>
- * In their class init function, they must override
- * GST_TAG_DEMUX_CLASS(demux_klass)->identify_tag with their own identify
- * function.
- * </para></listitem>
- * <listitem><para>
- * In their class init function, they must override
- * GST_TAG_DEMUX_CLASS(demux_klass)->parse_tag with their own parse
- * function.
- * </para></listitem>
- * <listitem><para>
- * In their instance init function, they must set
- * GST_TAG_DEMUX(demux)->min_start_size and/or
- * GST_TAG_DEMUX(demux)->min_end_size to the minimum size required for the
- * identify function to decide whether the stream has a supported tag or
- * not. A class parsing ID3v1 tags, for example, would set min_end_size to
- * 128 bytes.
- * </para></listitem>
- * </itemizedlist>
- * </para>
- * </refsect2>
- */
-
-#ifdef HAVE_CONFIG_H
-#include "config.h"
-#endif
-
-#include "gsttagdemux.h"
-
-#include <gst/base/gsttypefindhelper.h>
-#include <gst/gst-i18n-plugin.h>
-#include <string.h>
-
-typedef enum
-{
- GST_TAG_DEMUX_READ_START_TAG,
- GST_TAG_DEMUX_TYPEFINDING,
- GST_TAG_DEMUX_STREAMING
-} GstTagDemuxState;
-
-struct _GstTagDemuxPrivate
-{
- GstPad *srcpad;
- GstPad *sinkpad;
-
- /* Number of bytes to remove from the
- * start of file (tag at beginning) */
- guint strip_start;
-
- /* Number of bytes to remove from the
- * end of file (tag at end) */
- guint strip_end;
-
- gint64 upstream_size;
-
- GstTagDemuxState state;
- GstBuffer *collect;
- GstCaps *src_caps;
-
- GstTagList *event_tags;
- GstTagList *parsed_tags;
- gboolean send_tag_event;
-
- GstSegment segment;
- gboolean need_newseg;
- gboolean newseg_update;
-};
-
-/* Require at least 8kB of data before we attempt typefind.
- * Seems a decent value based on test files
- * 40kB is massive overkill for the maximum, I think, but it
- * doesn't do any harm (tpm: increased to 64kB after watching
- * typefinding fail on a wavpack file that needed 42kB to succeed) */
-#define TYPE_FIND_MIN_SIZE 8192
-#define TYPE_FIND_MAX_SIZE 65536
-
-GST_DEBUG_CATEGORY_STATIC (tagdemux_debug);
-#define GST_CAT_DEFAULT (tagdemux_debug)
-
-static GstStaticPadTemplate src_factory = GST_STATIC_PAD_TEMPLATE ("src",
- GST_PAD_SRC,
- GST_PAD_SOMETIMES,
- GST_STATIC_CAPS ("ANY")
- );
-
-static void gst_tag_demux_dispose (GObject * object);
-
-static GstFlowReturn gst_tag_demux_chain (GstPad * pad, GstBuffer * buf);
-static gboolean gst_tag_demux_sink_event (GstPad * pad, GstEvent * event);
-
-static gboolean gst_tag_demux_src_activate_pull (GstPad * pad, gboolean active);
-static GstFlowReturn gst_tag_demux_read_range (GstTagDemux * tagdemux,
- guint64 offset, guint length, GstBuffer ** buffer);
-
-static gboolean gst_tag_demux_src_checkgetrange (GstPad * srcpad);
-static GstFlowReturn gst_tag_demux_src_getrange (GstPad * srcpad,
- guint64 offset, guint length, GstBuffer ** buffer);
-
-static gboolean gst_tag_demux_add_srcpad (GstTagDemux * tagdemux,
- GstCaps * new_caps);
-static gboolean gst_tag_demux_remove_srcpad (GstTagDemux * tagdemux);
-
-static gboolean gst_tag_demux_srcpad_event (GstPad * pad, GstEvent * event);
-static gboolean gst_tag_demux_sink_activate (GstPad * sinkpad);
-static GstStateChangeReturn gst_tag_demux_change_state (GstElement * element,
- GstStateChange transition);
-static gboolean gst_tag_demux_pad_query (GstPad * pad, GstQuery * query);
-static const GstQueryType *gst_tag_demux_get_query_types (GstPad * pad);
-static gboolean gst_tag_demux_get_upstream_size (GstTagDemux * tagdemux);
-static void gst_tag_demux_send_tag_event (GstTagDemux * tagdemux);
-static gboolean gst_tag_demux_send_new_segment (GstTagDemux * tagdemux);
-
-static void gst_tag_demux_base_init (gpointer g_class);
-static void gst_tag_demux_class_init (gpointer g_class, gpointer d);
-static void gst_tag_demux_init (GstTagDemux * obj, GstTagDemuxClass * klass);
-
-static gpointer parent_class; /* NULL */
-
-/* Cannot use boilerplate macros here because we want the abstract flag */
-GType
-gst_tag_demux_get_type (void)
-{
- static GType object_type; /* 0 */
-
- if (object_type == 0) {
- static const GTypeInfo object_info = {
- sizeof (GstTagDemuxClass),
- gst_tag_demux_base_init,
- NULL, /* base_finalize */
- gst_tag_demux_class_init,
- NULL, /* class_finalize */
- NULL, /* class_data */
- sizeof (GstTagDemux),
- 0, /* n_preallocs */
- (GInstanceInitFunc) gst_tag_demux_init
- };
-
- object_type = g_type_register_static (GST_TYPE_ELEMENT,
- "GstApeDemuxBase", &object_info, G_TYPE_FLAG_ABSTRACT);
- }
-
- return object_type;
-}
-
-static void
-gst_tag_demux_base_init (gpointer klass)
-{
- GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
-
- gst_element_class_add_pad_template (element_class,
- gst_static_pad_template_get (&src_factory));
-
- GST_DEBUG_CATEGORY_INIT (tagdemux_debug, "tagdemux", 0,
- "GStreamer tag demux base class");
-}
-
-static void
-gst_tag_demux_class_init (gpointer klass, gpointer d)
-{
- GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
- GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
-
- parent_class = g_type_class_peek_parent (klass);
-
- gobject_class->dispose = gst_tag_demux_dispose;
-
- element_class->change_state = GST_DEBUG_FUNCPTR (gst_tag_demux_change_state);
-
- g_type_class_add_private (klass, sizeof (GstTagDemuxPrivate));
-}
-
-static void
-gst_tag_demux_reset (GstTagDemux * tagdemux)
-{
- GstBuffer **buffer_p = &tagdemux->priv->collect;
- GstCaps **caps_p = &tagdemux->priv->src_caps;
-
- tagdemux->priv->strip_start = 0;
- tagdemux->priv->strip_end = 0;
- tagdemux->priv->upstream_size = -1;
- tagdemux->priv->state = GST_TAG_DEMUX_READ_START_TAG;
- tagdemux->priv->send_tag_event = FALSE;
-
- gst_buffer_replace (buffer_p, NULL);
- gst_caps_replace (caps_p, NULL);
-
- gst_tag_demux_remove_srcpad (tagdemux);
-
- if (tagdemux->priv->event_tags) {
- gst_tag_list_free (tagdemux->priv->event_tags);
- tagdemux->priv->event_tags = NULL;
- }
- if (tagdemux->priv->parsed_tags) {
- gst_tag_list_free (tagdemux->priv->parsed_tags);
- tagdemux->priv->parsed_tags = NULL;
- }
-
- gst_segment_init (&tagdemux->priv->segment, GST_FORMAT_UNDEFINED);
- tagdemux->priv->need_newseg = TRUE;
- tagdemux->priv->newseg_update = FALSE;
-}
-
-static void
-gst_tag_demux_init (GstTagDemux * demux, GstTagDemuxClass * gclass)
-{
- GstElementClass *element_klass = GST_ELEMENT_CLASS (gclass);
- GstPadTemplate *tmpl;
-
- demux->priv = g_type_instance_get_private ((GTypeInstance *) demux,
- GST_TYPE_TAG_DEMUX);
-
- /* subclasses must set these to sane values */
- demux->min_start_size = 0;
- demux->min_end_size = 0;
-
- /* subclasses may set these, we just set defaults */
- demux->prefer_start_tag = TRUE;
-
- tmpl = gst_element_class_get_pad_template (element_klass, "sink");
- if (tmpl) {
- demux->priv->sinkpad = gst_pad_new_from_template (tmpl, "sink");
-
- gst_pad_set_activate_function (demux->priv->sinkpad,
- GST_DEBUG_FUNCPTR (gst_tag_demux_sink_activate));
- gst_pad_set_event_function (demux->priv->sinkpad,
- GST_DEBUG_FUNCPTR (gst_tag_demux_sink_event));
- gst_pad_set_chain_function (demux->priv->sinkpad,
- GST_DEBUG_FUNCPTR (gst_tag_demux_chain));
- gst_element_add_pad (GST_ELEMENT (demux), demux->priv->sinkpad);
- }
-
- gst_tag_demux_reset (demux);
-}
-
-static void
-gst_tag_demux_dispose (GObject * object)
-{
- GstTagDemux *tagdemux = GST_TAG_DEMUX (object);
-
- gst_tag_demux_reset (tagdemux);
-
- G_OBJECT_CLASS (parent_class)->dispose (object);
-}
-
-static gboolean
-gst_tag_demux_add_srcpad (GstTagDemux * tagdemux, GstCaps * new_caps)
-{
- GstPad *srcpad = NULL;
-
- if (tagdemux->priv->src_caps == NULL ||
- !gst_caps_is_equal (new_caps, tagdemux->priv->src_caps)) {
-
- gst_caps_replace (&(tagdemux->priv->src_caps), new_caps);
- if (tagdemux->priv->srcpad != NULL) {
- GST_DEBUG_OBJECT (tagdemux, "Changing src pad caps to %" GST_PTR_FORMAT,
- tagdemux->priv->src_caps);
-
- gst_pad_set_caps (tagdemux->priv->srcpad, tagdemux->priv->src_caps);
- }
- } else {
- /* Caps never changed */
- gst_caps_unref (new_caps);
- }
-
- if (tagdemux->priv->srcpad == NULL) {
- srcpad = tagdemux->priv->srcpad =
- gst_pad_new_from_template (gst_element_class_get_pad_template
- (GST_ELEMENT_GET_CLASS (tagdemux), "src"), "src");
- g_return_val_if_fail (tagdemux->priv->srcpad != NULL, FALSE);
-
- gst_pad_set_query_type_function (tagdemux->priv->srcpad,
- GST_DEBUG_FUNCPTR (gst_tag_demux_get_query_types));
- gst_pad_set_query_function (tagdemux->priv->srcpad,
- GST_DEBUG_FUNCPTR (gst_tag_demux_pad_query));
- gst_pad_set_event_function (tagdemux->priv->srcpad,
- GST_DEBUG_FUNCPTR (gst_tag_demux_srcpad_event));
- gst_pad_set_activatepull_function (tagdemux->priv->srcpad,
- GST_DEBUG_FUNCPTR (gst_tag_demux_src_activate_pull));
- gst_pad_set_checkgetrange_function (tagdemux->priv->srcpad,
- GST_DEBUG_FUNCPTR (gst_tag_demux_src_checkgetrange));
- gst_pad_set_getrange_function (tagdemux->priv->srcpad,
- GST_DEBUG_FUNCPTR (gst_tag_demux_src_getrange));
-
- gst_pad_use_fixed_caps (tagdemux->priv->srcpad);
-
- if (tagdemux->priv->src_caps)
- gst_pad_set_caps (tagdemux->priv->srcpad, tagdemux->priv->src_caps);
-
- GST_DEBUG_OBJECT (tagdemux, "Adding src pad with caps %" GST_PTR_FORMAT,
- tagdemux->priv->src_caps);
-
- gst_object_ref (tagdemux->priv->srcpad);
- gst_pad_set_active (tagdemux->priv->srcpad, TRUE);
- if (!(gst_element_add_pad (GST_ELEMENT (tagdemux), tagdemux->priv->srcpad)))
- return FALSE;
- gst_element_no_more_pads (GST_ELEMENT (tagdemux));
- }
-
- return TRUE;
-}
-
-static gboolean
-gst_tag_demux_remove_srcpad (GstTagDemux * demux)
-{
- gboolean res = TRUE;
-
- if (demux->priv->srcpad != NULL) {
- GST_DEBUG_OBJECT (demux, "Removing src pad");
- res = gst_element_remove_pad (GST_ELEMENT (demux), demux->priv->srcpad);
- g_return_val_if_fail (res != FALSE, FALSE);
- gst_object_unref (demux->priv->srcpad);
- demux->priv->srcpad = NULL;
- }
-
- return res;
-};
-
-/* will return FALSE if buffer is beyond end of data; will return TRUE
- * if buffer was trimmed successfully or didn't need trimming, but may
- * also return TRUE and set *buf_ref to NULL if the buffer was before
- * the start of the data */
-static gboolean
-gst_tag_demux_trim_buffer (GstTagDemux * tagdemux, GstBuffer ** buf_ref)
-{
- GstBuffer *buf = *buf_ref;
-
- guint trim_start = 0;
- guint out_size = GST_BUFFER_SIZE (buf);
- guint64 out_offset = GST_BUFFER_OFFSET (buf);
- gboolean need_sub = FALSE;
-
- /* Adjust offset and length */
- if (!GST_BUFFER_OFFSET_IS_VALID (buf)) {
- /* Can't change anything without an offset */
- return TRUE;
- }
-
- /* If the buffer crosses the tag at the end of file, trim it */
- if (tagdemux->priv->strip_end > 0) {
- if (gst_tag_demux_get_upstream_size (tagdemux)) {
- guint64 v1tag_offset =
- tagdemux->priv->upstream_size - tagdemux->priv->strip_end;
-
- if (out_offset >= v1tag_offset) {
- GST_DEBUG_OBJECT (tagdemux, "Buffer is past the end of the data");
- goto no_out_buffer_end;
- }
-
- if (out_offset + out_size > v1tag_offset) {
- out_size = v1tag_offset - out_offset;
- need_sub = TRUE;
- }
- }
- }
-
- if (tagdemux->priv->strip_start > 0) {
- /* If the buffer crosses the tag at the start of file, trim it */
- if (out_offset <= tagdemux->priv->strip_start) {
- if (out_offset + out_size <= tagdemux->priv->strip_start) {
- GST_DEBUG_OBJECT (tagdemux, "Buffer is before the start of the data");
- goto no_out_buffer_start;
- }
-
- trim_start = tagdemux->priv->strip_start - out_offset;
- out_size -= trim_start;
- out_offset = 0;
- } else {
- out_offset -= tagdemux->priv->strip_start;
- }
- need_sub = TRUE;
- }
-
- g_assert (out_size > 0);
-
- if (need_sub == TRUE) {
- if (out_size != GST_BUFFER_SIZE (buf) || !gst_buffer_is_writable (buf)) {
- GstBuffer *sub;
-
- GST_DEBUG_OBJECT (tagdemux, "Sub-buffering to trim size %d offset %"
- G_GINT64_FORMAT " to %d offset %" G_GINT64_FORMAT,
- GST_BUFFER_SIZE (buf), GST_BUFFER_OFFSET (buf), out_size, out_offset);
-
- sub = gst_buffer_create_sub (buf, trim_start, out_size);
- g_return_val_if_fail (sub != NULL, FALSE);
- gst_buffer_unref (buf);
- *buf_ref = buf = sub;
- } else {
- GST_DEBUG_OBJECT (tagdemux, "Adjusting buffer from size %d offset %"
- G_GINT64_FORMAT " to %d offset %" G_GINT64_FORMAT,
- GST_BUFFER_SIZE (buf), GST_BUFFER_OFFSET (buf), out_size, out_offset);
- }
-
- GST_BUFFER_OFFSET (buf) = out_offset;
- GST_BUFFER_OFFSET_END (buf) = out_offset + out_size;
- gst_buffer_set_caps (buf, tagdemux->priv->src_caps);
- }
-
- return TRUE;
-
-no_out_buffer_end:
- {
- gst_buffer_unref (buf);
- *buf_ref = NULL;
- return FALSE;
- }
-no_out_buffer_start:
- {
- gst_buffer_unref (buf);
- *buf_ref = NULL;
- return TRUE;
- }
-}
-
-static void
-gst_tag_demux_chain_parse_tag (GstTagDemux * demux, GstBuffer * collect)
-{
- GstTagDemuxResult parse_ret;
- GstTagDemuxClass *klass;
- guint tagsize = 0;
- guint available;
-
- g_assert (gst_buffer_is_metadata_writable (collect));
-
- klass = GST_TAG_DEMUX_CLASS (G_OBJECT_GET_CLASS (demux));
-
- /* If we receive a buffer that's from the middle of the file,
- * we can't read tags so move to typefinding */
- if (GST_BUFFER_OFFSET_IS_VALID (collect) && GST_BUFFER_OFFSET (collect) != 0) {
- GST_DEBUG_OBJECT (demux, "Received buffer from non-zero offset %"
- G_GINT64_FORMAT ". Can't read tags", GST_BUFFER_OFFSET (collect));
- demux->priv->state = GST_TAG_DEMUX_TYPEFINDING;
- return;
- }
-
- g_assert (klass->identify_tag != NULL);
- g_assert (klass->parse_tag != NULL);
-
- available = GST_BUFFER_SIZE (collect);
-
- if (available < demux->min_start_size) {
- GST_DEBUG_OBJECT (demux, "Only %u bytes available, but %u needed "
- "to identify tag", available, demux->min_start_size);
- return; /* wait for more data */
- }
-
- if (!klass->identify_tag (demux, collect, TRUE, &tagsize)) {
- GST_DEBUG_OBJECT (demux, "Could not identify start tag");
- demux->priv->state = GST_TAG_DEMUX_TYPEFINDING;
- return;
- }
-
- /* need to set offset of first buffer to 0 or trimming won't work */
- if (!GST_BUFFER_OFFSET_IS_VALID (collect)) {
- GST_WARNING_OBJECT (demux, "Fixing up first buffer without offset");
- GST_BUFFER_OFFSET (collect) = 0;
- }
-
- GST_DEBUG_OBJECT (demux, "Identified tag, size = %u bytes", tagsize);
-
- do {
- GstTagList *tags = NULL;
- guint newsize, saved_size;
-
- demux->priv->strip_start = tagsize;
-
- if (available < tagsize) {
- GST_DEBUG_OBJECT (demux, "Only %u bytes available, but %u needed "
- "to parse tag", available, tagsize);
- return; /* wait for more data */
- }
-
- saved_size = GST_BUFFER_SIZE (collect);
- GST_BUFFER_SIZE (collect) = tagsize;
- newsize = tagsize;
-
- parse_ret = klass->parse_tag (demux, collect, TRUE, &newsize, &tags);
-
- GST_BUFFER_SIZE (collect) = saved_size;
-
- switch (parse_ret) {
- case GST_TAG_DEMUX_RESULT_OK:
- demux->priv->strip_start = newsize;
- demux->priv->parsed_tags = tags;
- GST_DEBUG_OBJECT (demux, "Read start tag of size %u", newsize);
- break;
- case GST_TAG_DEMUX_RESULT_BROKEN_TAG:
- demux->priv->strip_start = newsize;
- demux->priv->parsed_tags = tags;
- GST_WARNING_OBJECT (demux, "Ignoring broken start tag of size %d",
- demux->priv->strip_start);
- break;
- case GST_TAG_DEMUX_RESULT_AGAIN:
- GST_DEBUG_OBJECT (demux, "Re-parse, this time with %u bytes", newsize);
- g_assert (newsize != tagsize);
- tagsize = newsize;
- break;
- }
- } while (parse_ret == GST_TAG_DEMUX_RESULT_AGAIN);
-
- GST_LOG_OBJECT (demux, "Parsed tag. Proceeding to typefinding");
- demux->priv->state = GST_TAG_DEMUX_TYPEFINDING;
- demux->priv->send_tag_event = TRUE;
-}
-
-static GstFlowReturn
-gst_tag_demux_chain (GstPad * pad, GstBuffer * buf)
-{
- GstTagDemux *demux;
-
- demux = GST_TAG_DEMUX (GST_PAD_PARENT (pad));
- g_return_val_if_fail (GST_IS_TAG_DEMUX (demux), GST_FLOW_ERROR);
-
- /* Update our segment last_stop info */
- if (demux->priv->segment.format == GST_FORMAT_BYTES) {
- if (GST_BUFFER_OFFSET_IS_VALID (buf))
- demux->priv->segment.last_stop = GST_BUFFER_OFFSET (buf);
- demux->priv->segment.last_stop += GST_BUFFER_SIZE (buf);
- } else if (demux->priv->segment.format == GST_FORMAT_TIME) {
- if (GST_BUFFER_TIMESTAMP_IS_VALID (buf))
- demux->priv->segment.last_stop = GST_BUFFER_TIMESTAMP (buf);
- if (GST_BUFFER_DURATION_IS_VALID (buf))
- demux->priv->segment.last_stop += GST_BUFFER_DURATION (buf);
- }
-
- if (demux->priv->collect == NULL) {
- demux->priv->collect = buf;
- } else {
- demux->priv->collect = gst_buffer_join (demux->priv->collect, buf);
- }
- buf = NULL;
-
- switch (demux->priv->state) {
- case GST_TAG_DEMUX_READ_START_TAG:
- demux->priv->collect =
- gst_buffer_make_metadata_writable (demux->priv->collect);
- gst_tag_demux_chain_parse_tag (demux, demux->priv->collect);
- if (demux->priv->state != GST_TAG_DEMUX_TYPEFINDING)
- break;
- /* Fall-through */
- case GST_TAG_DEMUX_TYPEFINDING:{
- GstTypeFindProbability probability = 0;
- GstBuffer *typefind_buf = NULL;
- GstCaps *caps;
-
- if (GST_BUFFER_SIZE (demux->priv->collect) <
- TYPE_FIND_MIN_SIZE + demux->priv->strip_start)
- break; /* Go get more data first */
-
- GST_DEBUG_OBJECT (demux, "Typefinding with size %d",
- GST_BUFFER_SIZE (demux->priv->collect));
-
- /* Trim the buffer and adjust offset for typefinding */
- typefind_buf = demux->priv->collect;
- gst_buffer_ref (typefind_buf);
- if (!gst_tag_demux_trim_buffer (demux, &typefind_buf))
- return GST_FLOW_UNEXPECTED;
-
- if (typefind_buf == NULL)
- break; /* Still need more data */
-
- caps = gst_type_find_helper_for_buffer (GST_OBJECT (demux),
- typefind_buf, &probability);
-
- if (caps == NULL) {
- if (GST_BUFFER_SIZE (typefind_buf) < TYPE_FIND_MAX_SIZE) {
- /* Just break for more data */
- gst_buffer_unref (typefind_buf);
- return GST_FLOW_OK;
- }
-
- /* We failed typefind */
- GST_ELEMENT_ERROR (demux, STREAM, TYPE_NOT_FOUND, (NULL), (NULL));
- gst_buffer_unref (typefind_buf);
- gst_buffer_unref (demux->priv->collect);
- demux->priv->collect = NULL;
- return GST_FLOW_ERROR;
- }
- gst_buffer_unref (typefind_buf);
-
- GST_DEBUG_OBJECT (demux, "Found type %" GST_PTR_FORMAT " with a "
- "probability of %u", caps, probability);
-
- if (!gst_tag_demux_add_srcpad (demux, caps)) {
- GST_DEBUG_OBJECT (demux, "Failed to add srcpad");
- gst_caps_unref (caps);
- goto error;
- }
- gst_caps_unref (caps);
-
- /* Move onto streaming and fall-through to push out existing
- * data */
- demux->priv->state = GST_TAG_DEMUX_STREAMING;
- /* fall-through */
- }
- case GST_TAG_DEMUX_STREAMING:{
- GstBuffer *outbuf = NULL;
-
- if (demux->priv->send_tag_event) {
- gst_tag_demux_send_tag_event (demux);
- demux->priv->send_tag_event = FALSE;
- }
-
- /* Trim the buffer and adjust offset */
- if (demux->priv->collect) {
- outbuf = demux->priv->collect;
- demux->priv->collect = NULL;
- if (!gst_tag_demux_trim_buffer (demux, &outbuf))
- return GST_FLOW_UNEXPECTED;
- }
- if (outbuf) {
- if (G_UNLIKELY (demux->priv->srcpad == NULL)) {
- gst_buffer_unref (outbuf);
- return GST_FLOW_ERROR;
- }
-
- GST_DEBUG_OBJECT (demux, "Pushing buffer %p", outbuf);
- /* gst_util_dump_mem (GST_BUFFER_DATA (outbuf),
- GST_BUFFER_SIZE (outbuf)); */
-
- /* Ensure the caps are set correctly */
- outbuf = gst_buffer_make_metadata_writable (outbuf);
- gst_buffer_set_caps (outbuf, GST_PAD_CAPS (demux->priv->srcpad));
-
- /* Might need a new segment before the buffer */
- if (demux->priv->need_newseg) {
- if (!gst_tag_demux_send_new_segment (demux)) {
- GST_DEBUG_OBJECT (demux, "Failed to send new segment event");
- goto error;
- }
- demux->priv->need_newseg = FALSE;
- }
-
- return gst_pad_push (demux->priv->srcpad, outbuf);
- }
- }
- }
- return GST_FLOW_OK;
-
-error:
- GST_DEBUG_OBJECT (demux, "error in chain function");
-
- return GST_FLOW_ERROR;
-}
-
-static gboolean
-gst_tag_demux_sink_event (GstPad * pad, GstEvent * event)
-{
- GstTagDemux *demux;
- gboolean ret;
-
- demux = GST_TAG_DEMUX (gst_pad_get_parent (pad));
-
- switch (GST_EVENT_TYPE (event)) {
- case GST_EVENT_EOS:
- if (demux->priv->srcpad == NULL) {
- GST_WARNING_OBJECT (demux, "EOS before we found a type");
- GST_ELEMENT_ERROR (demux, STREAM, TYPE_NOT_FOUND, (NULL), (NULL));
- }
- ret = gst_pad_event_default (pad, event);
- break;
- case GST_EVENT_NEWSEGMENT:{
- gboolean update;
- gdouble rate, arate;
- GstFormat format;
- gint64 start, stop, position;
-
- gst_event_parse_new_segment_full (event, &update, &rate, &arate,
- &format, &start, &stop, &position);
-
- gst_segment_set_newsegment_full (&demux->priv->segment, update, rate,
- arate, format, start, stop, position);
- demux->priv->newseg_update = update;
- demux->priv->need_newseg = TRUE;
- ret = TRUE;
- break;
- }
- default:
- ret = gst_pad_event_default (pad, event);
- break;
- }
-
- gst_object_unref (demux);
- return ret;
-}
-
-static gboolean
-gst_tag_demux_get_upstream_size (GstTagDemux * tagdemux)
-{
- GstFormat format;
- gint64 len;
-
- /* Short-cut if we already queried upstream */
- if (tagdemux->priv->upstream_size > 0)
- return TRUE;
-
- format = GST_FORMAT_BYTES;
- if (!gst_pad_query_peer_duration (tagdemux->priv->sinkpad, &format, &len) ||
- len <= 0) {
- return FALSE;
- }
-
- tagdemux->priv->upstream_size = len;
- return TRUE;
-}
-
-static gboolean
-gst_tag_demux_srcpad_event (GstPad * pad, GstEvent * event)
-{
- gboolean res = FALSE;
- GstTagDemux *tagdemux = GST_TAG_DEMUX (GST_PAD_PARENT (pad));
-
- /* Handle SEEK events, with adjusted byte offsets and sizes. */
-
- switch (GST_EVENT_TYPE (event)) {
- case GST_EVENT_SEEK:
- {
- gdouble rate;
- GstFormat format;
- GstSeekType cur_type, stop_type;
- GstSeekFlags flags;
- gint64 cur, stop;
-
- gst_event_parse_seek (event, &rate, &format, &flags,
- &cur_type, &cur, &stop_type, &stop);
-
- if (format == GST_FORMAT_BYTES &&
- tagdemux->priv->state == GST_TAG_DEMUX_STREAMING &&
- gst_pad_is_linked (tagdemux->priv->sinkpad)) {
- GstEvent *upstream;
-
- switch (cur_type) {
- case GST_SEEK_TYPE_SET:
- if (cur == -1)
- cur = 0;
- cur += tagdemux->priv->strip_start;
- break;
- case GST_SEEK_TYPE_CUR:
- break;
- case GST_SEEK_TYPE_END:
- /* Adjust the seek to be relative to the start of any end tag
- * (note: 10 bytes before end is represented by stop=-10) */
- if (cur > 0)
- cur = 0;
- cur -= tagdemux->priv->strip_end;
- break;
- default:
- g_assert_not_reached ();
- break;
- }
- switch (stop_type) {
- case GST_SEEK_TYPE_SET:
- if (stop != -1) {
- /* -1 means the end of the file, pass it upstream intact */
- stop += tagdemux->priv->strip_start;
- }
- break;
- case GST_SEEK_TYPE_CUR:
- break;
- case GST_SEEK_TYPE_END:
- /* Adjust the seek to be relative to the start of any end tag
- * (note: 10 bytes before end is represented by stop=-10) */
- if (stop > 0)
- stop = 0;
- stop -= tagdemux->priv->strip_end;
- break;
- default:
- break;
- }
- upstream = gst_event_new_seek (rate, format, flags,
- cur_type, cur, stop_type, stop);
- res = gst_pad_push_event (tagdemux->priv->sinkpad, upstream);
- }
- break;
- }
- default:
- break;
- }
-
- gst_event_unref (event);
- return res;
-}
-
-/* takes ownership of new_tags */
-
-static void
-gst_tag_demux_merge_tags (GstTagList ** tags, GstTagList * new_tags)
-{
- g_return_if_fail (tags != NULL);
-
- if (new_tags == NULL)
- return;
-
- GST_LOG ("New tags: %" GST_PTR_FORMAT, new_tags);
-
- if (*tags != NULL) {
- GstTagList *merged;
-
- merged = gst_tag_list_merge (*tags, new_tags, GST_TAG_MERGE_REPLACE);
- gst_tag_list_free (*tags);
- gst_tag_list_free (new_tags);
- *tags = merged;
- } else {
- *tags = new_tags;
- }
-
- GST_LOG ("Tags now: %" GST_PTR_FORMAT, *tags);
-}
-
-/* Read and interpret any end tag when activating in pull_range.
- * Returns FALSE if pad activation should fail. */
-static gboolean
-gst_tag_demux_pull_end_tag (GstTagDemux * demux, GstTagList ** tags)
-{
- GstTagDemuxResult parse_ret;
- GstTagDemuxClass *klass;
- GstFlowReturn flow_ret;
- GstTagList *new_tags = NULL;
- GstBuffer *buffer = NULL;
- gboolean have_tag;
- gboolean res = FALSE;
- guint64 offset;
- guint tagsize;
-
- klass = GST_TAG_DEMUX_CLASS (G_OBJECT_GET_CLASS (demux));
-
- g_assert (klass->identify_tag != NULL);
- g_assert (klass->parse_tag != NULL);
-
- if (demux->min_end_size == 0) {
- GST_DEBUG_OBJECT (demux, "Not looking for tag at the end");
- return TRUE;
- }
-
- if (demux->priv->upstream_size < demux->min_end_size) {
- GST_DEBUG_OBJECT (demux, "File too small");
- return TRUE;
- }
-
- /* Pull enough to identify the tag and retrieve its total size */
- offset = demux->priv->upstream_size - demux->min_end_size;
-
- flow_ret = gst_pad_pull_range (demux->priv->sinkpad, offset,
- demux->min_end_size, &buffer);
-
- if (flow_ret != GST_FLOW_OK) {
- GST_DEBUG_OBJECT (demux, "Could not read tag header from end of file, "
- "ret = %s", gst_flow_get_name (flow_ret));
- goto done;
- }
-
- if (GST_BUFFER_SIZE (buffer) < demux->min_end_size) {
- GST_DEBUG_OBJECT (demux, "Only managed to read %u bytes from file "
- "(required: %u bytes)", GST_BUFFER_SIZE (buffer), demux->min_end_size);
- goto done;
- }
-
- have_tag = klass->identify_tag (demux, buffer, FALSE, &tagsize);
-
- if (!have_tag) {
- GST_DEBUG_OBJECT (demux, "Could not find tag at end");
- goto done;
- }
-
- /* Now pull the entire tag */
- do {
- guint newsize, saved_size;
-
- GST_DEBUG_OBJECT (demux, "Identified tag at end, size=%u bytes", tagsize);
-
- demux->priv->strip_end = tagsize;
-
- g_assert (tagsize >= demux->min_end_size);
-
- /* Get buffer that's exactly the requested size */
- if (GST_BUFFER_SIZE (buffer) != tagsize) {
- gst_buffer_unref (buffer);
- buffer = NULL;
-
- offset = demux->priv->upstream_size - tagsize;
-
- flow_ret = gst_pad_pull_range (demux->priv->sinkpad, offset,
- tagsize, &buffer);
-
- if (flow_ret != GST_FLOW_OK) {
- GST_DEBUG_OBJECT (demux, "Could not read data from end of file at "
- "offset %" G_GUINT64_FORMAT ". ret = %s", offset,
- gst_flow_get_name (flow_ret));
- goto done;
- }
-
- if (GST_BUFFER_SIZE (buffer) < tagsize) {
- GST_DEBUG_OBJECT (demux, "Only managed to read %u bytes from file",
- GST_BUFFER_SIZE (buffer));
- goto done;
- }
- }
-
- GST_BUFFER_OFFSET (buffer) = offset;
-
- saved_size = GST_BUFFER_SIZE (buffer);
- GST_BUFFER_SIZE (buffer) = tagsize;
- newsize = tagsize;
-
- parse_ret = klass->parse_tag (demux, buffer, FALSE, &newsize, &new_tags);
-
- GST_BUFFER_SIZE (buffer) = saved_size;
-
- switch (parse_ret) {
- case GST_TAG_DEMUX_RESULT_OK:
- res = TRUE;
- demux->priv->strip_end = newsize;
- GST_DEBUG_OBJECT (demux, "Read tag at end, size %d",
- demux->priv->strip_end);
- break;
- case GST_TAG_DEMUX_RESULT_BROKEN_TAG:
- res = TRUE;
- demux->priv->strip_end = newsize;
- GST_WARNING_OBJECT (demux, "Ignoring broken tag at end, size %d",
- demux->priv->strip_end);
- break;
- case GST_TAG_DEMUX_RESULT_AGAIN:
- GST_DEBUG_OBJECT (demux, "Re-parse, this time with %d bytes", newsize);
- g_assert (newsize != tagsize);
- tagsize = newsize;
- break;
- }
- } while (parse_ret == GST_TAG_DEMUX_RESULT_AGAIN);
-
- gst_tag_demux_merge_tags (tags, new_tags);
- new_tags = NULL;
-
-done:
- if (new_tags)
- gst_tag_list_free (new_tags);
- if (buffer)
- gst_buffer_unref (buffer);
- return res;
-}
-
-/* Read and interpret any tag at the start when activating in
- * pull_range. Returns FALSE if pad activation should fail. */
-static gboolean
-gst_tag_demux_pull_start_tag (GstTagDemux * demux, GstTagList ** tags)
-{
- GstTagDemuxResult parse_ret;
- GstTagDemuxClass *klass;
- GstFlowReturn flow_ret;
- GstTagList *new_tags = NULL;
- GstBuffer *buffer = NULL;
- gboolean have_tag;
- gboolean res = FALSE;
- guint req, tagsize;
-
- klass = GST_TAG_DEMUX_CLASS (G_OBJECT_GET_CLASS (demux));
-
- g_assert (klass->identify_tag != NULL);
- g_assert (klass->parse_tag != NULL);
-
- if (demux->min_start_size == 0) {
- GST_DEBUG_OBJECT (demux, "Not looking for tag at the beginning");
- return TRUE;
- }
-
- /* Handle tag at start. Try with 4kB to start with */
- req = MAX (demux->min_start_size, 4096);
-
- /* Pull enough to identify the tag and retrieve its total size */
- flow_ret = gst_pad_pull_range (demux->priv->sinkpad, 0, req, &buffer);
- if (flow_ret != GST_FLOW_OK) {
- GST_DEBUG_OBJECT (demux, "Could not read data from start of file ret=%s",
- gst_flow_get_name (flow_ret));
- goto done;
- }
-
- if (GST_BUFFER_SIZE (buffer) < demux->min_start_size) {
- GST_DEBUG_OBJECT (demux, "Only managed to read %u bytes from file - "
- "no tag in this file", GST_BUFFER_SIZE (buffer));
- goto done;
- }
-
- have_tag = klass->identify_tag (demux, buffer, TRUE, &tagsize);
-
- if (!have_tag) {
- GST_DEBUG_OBJECT (demux, "Could not find start tag");
- res = TRUE;
- goto done;
- }
-
- GST_DEBUG_OBJECT (demux, "Identified start tag, size = %u bytes", tagsize);
-
- do {
- guint newsize, saved_size;
-
- demux->priv->strip_start = tagsize;
-
- /* Now pull the entire tag */
- g_assert (tagsize >= demux->min_start_size);
-
- if (GST_BUFFER_SIZE (buffer) < tagsize) {
- gst_buffer_unref (buffer);
- buffer = NULL;
-
- flow_ret = gst_pad_pull_range (demux->priv->sinkpad, 0, tagsize, &buffer);
- if (flow_ret != GST_FLOW_OK) {
- GST_DEBUG_OBJECT (demux, "Could not read data from start of file, "
- "ret = %s", gst_flow_get_name (flow_ret));
- goto done;
- }
-
- if (GST_BUFFER_SIZE (buffer) < tagsize) {
- GST_DEBUG_OBJECT (demux, "Only managed to read %u bytes from file",
- GST_BUFFER_SIZE (buffer));
- goto done;
- }
- }
-
- saved_size = GST_BUFFER_SIZE (buffer);
- GST_BUFFER_SIZE (buffer) = tagsize;
- newsize = tagsize;
- parse_ret = klass->parse_tag (demux, buffer, TRUE, &newsize, &new_tags);
-
- GST_BUFFER_SIZE (buffer) = saved_size;
-
- switch (parse_ret) {
- case GST_TAG_DEMUX_RESULT_OK:
- res = TRUE;
- demux->priv->strip_start = newsize;
- GST_DEBUG_OBJECT (demux, "Read start tag of size %d", newsize);
- break;
- case GST_TAG_DEMUX_RESULT_BROKEN_TAG:
- res = TRUE;
- demux->priv->strip_start = newsize;
- GST_WARNING_OBJECT (demux, "Ignoring broken start tag of size %d",
- demux->priv->strip_start);
- break;
- case GST_TAG_DEMUX_RESULT_AGAIN:
- GST_DEBUG_OBJECT (demux, "Re-parse, this time with %d bytes", newsize);
- g_assert (newsize != tagsize);
- tagsize = newsize;
- break;
- }
- } while (parse_ret == GST_TAG_DEMUX_RESULT_AGAIN);
-
- gst_tag_demux_merge_tags (tags, new_tags);
- new_tags = NULL;
-
-done:
- if (new_tags)
- gst_tag_list_free (new_tags);
- if (buffer)
- gst_buffer_unref (buffer);
- return res;
-}
-
-/* This function operates similarly to gst_type_find_element_activate
- * in the typefind element
- * 1. try to activate in pull mode. if not, switch to push and succeed.
- * 2. try to read tags in pull mode
- * 3. typefind the contents
- * 4. deactivate pull mode.
- * 5. if we didn't find any caps, fail.
- * 6. Add the srcpad
- * 7. if the sink pad is activated, we are in pull mode. succeed.
- * otherwise activate both pads in push mode and succeed.
- */
-static gboolean
-gst_tag_demux_sink_activate (GstPad * sinkpad)
-{
- GstTypeFindProbability probability = 0;
- GstTagDemux *demux = GST_TAG_DEMUX (GST_PAD_PARENT (sinkpad));
- gboolean ret = FALSE;
- GstCaps *caps = NULL;
-
- /* 1: */
- /* If we can activate pull_range upstream, then read any end and start
- * tags, otherwise activate in push mode and the chain function will
- * collect buffers, read the start tag and output a buffer to end
- * preroll.
- */
- if (!gst_pad_check_pull_range (sinkpad) ||
- !gst_pad_activate_pull (sinkpad, TRUE)) {
- GST_DEBUG_OBJECT (demux, "No pull mode. Changing to push, but won't be "
- "able to read end tags");
- demux->priv->state = GST_TAG_DEMUX_READ_START_TAG;
- return gst_pad_activate_push (sinkpad, TRUE);
- }
-
- /* Look for tags at start and end of file */
- GST_DEBUG_OBJECT (demux, "Activated pull mode. Looking for tags");
- if (!gst_tag_demux_get_upstream_size (demux))
- return FALSE;
-
- demux->priv->strip_start = 0;
- demux->priv->strip_end = 0;
-
- /* we merge in REPLACE mode, so read the less important tag first */
- if (demux->prefer_start_tag) {
- if (!gst_tag_demux_pull_end_tag (demux, &demux->priv->parsed_tags) &&
- !gst_tag_demux_pull_start_tag (demux, &demux->priv->parsed_tags)) {
- return FALSE;
- }
- } else {
- if (!gst_tag_demux_pull_start_tag (demux, &demux->priv->parsed_tags) &&
- !gst_tag_demux_pull_end_tag (demux, &demux->priv->parsed_tags)) {
- return FALSE;
- }
- }
-
- if (demux->priv->parsed_tags != NULL) {
- demux->priv->send_tag_event = TRUE;
- }
-
- /* 3 - Do typefinding on data */
- caps = gst_type_find_helper_get_range (GST_OBJECT (demux),
- (GstTypeFindHelperGetRangeFunction) gst_tag_demux_read_range,
- demux->priv->upstream_size
- - (demux->priv->strip_start + demux->priv->strip_end), &probability);
-
- GST_DEBUG_OBJECT (demux, "Found type %" GST_PTR_FORMAT " with a "
- "probability of %u", caps, probability);
-
- /* 4 - Deactivate pull mode */
- if (!gst_pad_activate_pull (sinkpad, FALSE)) {
- if (caps)
- gst_caps_unref (caps);
- GST_DEBUG_OBJECT (demux, "Could not deactivate sinkpad after reading tags");
- return FALSE;
- }
-
- /* 5 - If we didn't find the caps, fail */
- if (caps == NULL) {
- GST_DEBUG_OBJECT (demux, "Could not detect type of contents");
- GST_ELEMENT_ERROR (demux, STREAM, TYPE_NOT_FOUND, (NULL), (NULL));
- goto done_activate;
- }
-
- /* tag reading and typefinding were already done, don't do them again in
- * the chain function if we end up in push mode */
- demux->priv->state = GST_TAG_DEMUX_STREAMING;
-
- /* 6 Add the srcpad for output now we know caps. */
- /* add_srcpad takes ownership of the caps */
- if (!gst_tag_demux_add_srcpad (demux, caps)) {
- GST_DEBUG_OBJECT (demux, "Could not add source pad");
- goto done_activate;
- }
-
- /* 7 - if the sinkpad is active, it was done by downstream so we're
- * done, otherwise switch to push */
- ret = TRUE;
- if (!gst_pad_is_active (sinkpad)) {
- ret = gst_pad_activate_push (demux->priv->srcpad, TRUE);
- ret &= gst_pad_activate_push (sinkpad, TRUE);
- }
-
-done_activate:
-
- return ret;
-}
-
-static gboolean
-gst_tag_demux_src_activate_pull (GstPad * pad, gboolean active)
-{
- GstTagDemux *demux = GST_TAG_DEMUX (GST_PAD_PARENT (pad));
-
- return gst_pad_activate_pull (demux->priv->sinkpad, active);
-}
-
-static gboolean
-gst_tag_demux_src_checkgetrange (GstPad * srcpad)
-{
- GstTagDemux *demux = GST_TAG_DEMUX (GST_PAD_PARENT (srcpad));
-
- return gst_pad_check_pull_range (demux->priv->sinkpad);
-}
-
-static GstFlowReturn
-gst_tag_demux_read_range (GstTagDemux * demux,
- guint64 offset, guint length, GstBuffer ** buffer)
-{
- GstFlowReturn ret;
- guint64 in_offset;
- guint in_length;
-
- g_return_val_if_fail (buffer != NULL, GST_FLOW_ERROR);
-
- /* Adjust offset and length of the request to trim off tag information.
- * For the returned buffer, adjust the output offset to match what downstream
- * should see */
- in_offset = offset + demux->priv->strip_start;
-
- if (!gst_tag_demux_get_upstream_size (demux))
- return GST_FLOW_ERROR;
-
- if (in_offset + length >= demux->priv->upstream_size - demux->priv->strip_end) {
- if (in_offset + demux->priv->strip_end >= demux->priv->upstream_size)
- return GST_FLOW_UNEXPECTED;
- in_length = demux->priv->upstream_size - demux->priv->strip_end - in_offset;
- } else {
- in_length = length;
- }
-
- ret = gst_pad_pull_range (demux->priv->sinkpad, in_offset, in_length, buffer);
-
- if (ret == GST_FLOW_OK && *buffer) {
- if (!gst_tag_demux_trim_buffer (demux, buffer))
- goto read_beyond_end;
-
- /* this should only happen in streaming mode */
- g_assert (*buffer != NULL);
-
- gst_buffer_set_caps (*buffer, demux->priv->src_caps);
- }
-
- return ret;
-
-read_beyond_end:
- {
- GST_DEBUG_OBJECT (demux, "attempted read beyond end of file");
- if (*buffer != NULL) {
- gst_buffer_unref (buffer);
- *buffer = NULL;
- }
- return GST_FLOW_UNEXPECTED;
- }
-}
-
-static GstFlowReturn
-gst_tag_demux_src_getrange (GstPad * srcpad,
- guint64 offset, guint length, GstBuffer ** buffer)
-{
- GstTagDemux *demux = GST_TAG_DEMUX (GST_PAD_PARENT (srcpad));
- GstFlowReturn flow_ret;
-
- if (demux->priv->send_tag_event) {
- gst_tag_demux_send_tag_event (demux);
- demux->priv->send_tag_event = FALSE;
- }
- flow_ret = gst_tag_demux_read_range (demux, offset, length, buffer);
-/*
- if (flow_ret == GST_FLOW_OK) {
- gst_util_dump_mem (GST_BUFFER_DATA (*buffer), GST_BUFFER_SIZE (*buffer));
- }
-*/
- return flow_ret;
-}
-
-static GstStateChangeReturn
-gst_tag_demux_change_state (GstElement * element, GstStateChange transition)
-{
- GstStateChangeReturn ret;
- GstTagDemux *demux = GST_TAG_DEMUX (element);
-
- ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
-
- switch (transition) {
- case GST_STATE_CHANGE_PAUSED_TO_READY:
- gst_tag_demux_reset (demux);
- break;
- default:
- break;
- }
- return ret;
-}
-
-static gboolean
-gst_tag_demux_pad_query (GstPad * pad, GstQuery * query)
-{
- /* For a position or duration query, adjust the returned
- * bytes to strip off the end and start areas */
-
- GstTagDemux *demux = GST_TAG_DEMUX (GST_PAD_PARENT (pad));
- GstPad *peer = NULL;
- GstFormat format;
- gint64 result;
-
- if ((peer = gst_pad_get_peer (demux->priv->sinkpad)) == NULL)
- return FALSE;
-
- if (!gst_pad_query (peer, query)) {
- gst_object_unref (peer);
- return FALSE;
- }
-
- gst_object_unref (peer);
-
- switch (GST_QUERY_TYPE (query)) {
- case GST_QUERY_POSITION:
- {
- gst_query_parse_position (query, &format, &result);
- if (format == GST_FORMAT_BYTES) {
- result -= demux->priv->strip_start;
- gst_query_set_position (query, format, result);
- }
- break;
- }
- case GST_QUERY_DURATION:
- {
- gst_query_parse_duration (query, &format, &result);
- if (format == GST_FORMAT_BYTES) {
- result -= demux->priv->strip_start + demux->priv->strip_end;
- gst_query_set_duration (query, format, result);
- }
- break;
- }
- default:
- break;
- }
-
- return TRUE;
-}
-
-static const GstQueryType *
-gst_tag_demux_get_query_types (GstPad * pad)
-{
- static const GstQueryType types[] = {
- GST_QUERY_POSITION,
- GST_QUERY_DURATION,
- 0
- };
-
- return types;
-}
-
-static void
-gst_tag_demux_send_tag_event (GstTagDemux * demux)
-{
- /* FIXME: what's the correct merge mode? Docs need to tell... */
- GstTagList *merged = gst_tag_list_merge (demux->priv->event_tags,
- demux->priv->parsed_tags, GST_TAG_MERGE_KEEP);
-
- if (demux->priv->parsed_tags)
- gst_element_post_message (GST_ELEMENT (demux),
- gst_message_new_tag (GST_OBJECT (demux),
- gst_tag_list_copy (demux->priv->parsed_tags)));
-
- if (merged) {
- GstEvent *event = gst_event_new_tag (merged);
-
- GST_EVENT_TIMESTAMP (event) = 0;
- GST_DEBUG_OBJECT (demux, "Sending tag event on src pad");
- gst_pad_push_event (demux->priv->srcpad, event);
- }
-}
-
-static gboolean
-gst_tag_demux_send_new_segment (GstTagDemux * tagdemux)
-{
- GstEvent *event;
- gint64 start, stop, position;
- GstSegment *seg = &tagdemux->priv->segment;
-
- if (seg->format == GST_FORMAT_UNDEFINED) {
- GST_LOG_OBJECT (tagdemux,
- "No new segment received before first buffer. Using default");
- gst_segment_set_newsegment (seg, FALSE, 1.0,
- GST_FORMAT_BYTES, tagdemux->priv->strip_start, -1,
- tagdemux->priv->strip_start);
- }
-
- /* Can't adjust segments in non-BYTES formats */
- if (tagdemux->priv->segment.format != GST_FORMAT_BYTES) {
- event = gst_event_new_new_segment_full (tagdemux->priv->newseg_update,
- seg->rate, seg->applied_rate, seg->format, seg->start,
- seg->stop, seg->time);
- return gst_pad_push_event (tagdemux->priv->srcpad, event);
- }
-
- start = seg->start;
- stop = seg->stop;
- position = seg->time;
-
- g_return_val_if_fail (start != -1, FALSE);
- g_return_val_if_fail (position != -1, FALSE);
-
- if (tagdemux->priv->strip_end > 0) {
- if (gst_tag_demux_get_upstream_size (tagdemux)) {
- guint64 v1tag_offset =
- tagdemux->priv->upstream_size - tagdemux->priv->strip_end;
-
- if (start >= v1tag_offset) {
- /* Segment is completely within the ID3v1 tag, output an open-ended
- * segment, even though all the buffers will get trimmed away */
- start = v1tag_offset;
- stop = -1;
- }
-
- if (stop != -1 && stop >= v1tag_offset) {
- GST_DEBUG_OBJECT (tagdemux,
- "Segment crosses the ID3v1 tag. Trimming end");
- stop = v1tag_offset;
- }
- }
- }
-
- if (tagdemux->priv->strip_start > 0) {
- if (start > tagdemux->priv->strip_start)
- start -= tagdemux->priv->strip_start;
- else
- start = 0;
-
- if (position > tagdemux->priv->strip_start)
- position -= tagdemux->priv->strip_start;
- else
- position = 0;
-
- if (stop != -1) {
- if (stop > tagdemux->priv->strip_start)
- stop -= tagdemux->priv->strip_start;
- else
- stop = 0;
- }
- }
-
- GST_DEBUG_OBJECT (tagdemux,
- "Sending new segment update %d, rate %g, format %d, "
- "start %" G_GINT64_FORMAT ", stop %" G_GINT64_FORMAT ", position %"
- G_GINT64_FORMAT, tagdemux->priv->newseg_update, seg->rate, seg->format,
- start, stop, position);
-
- event = gst_event_new_new_segment_full (tagdemux->priv->newseg_update,
- seg->rate, seg->applied_rate, seg->format, start, stop, position);
- return gst_pad_push_event (tagdemux->priv->srcpad, event);
-}
projects / platform / upstream / gst-plugins-good.git / commitdiff