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gstreamer/gst/flv/gstflvdemux.c
Mark Nauwelaerts 2d6d2a4d95 flvdemux: remove obsolete reverse playback code path
2010-04-01 10:46:16 +02:00

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/* GStreamer
* Copyright (C) <2007> Julien Moutte <julien@moutte.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:element-flvdemux
*
* flvdemux demuxes an FLV file into the different contained streams.
*
* <refsect2>
* <title>Example launch line</title>
* |[
* gst-launch -v filesrc location=/path/to/flv ! flvdemux ! audioconvert ! autoaudiosink
* ]| This pipeline demuxes an FLV file and outputs the contained raw audio streams.
* </refsect2>
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "gstflvdemux.h"
#include "gstflvparse.h"
#include "gstflvmux.h"
#include <string.h>
#include <gst/base/gstbytereader.h>
static GstStaticPadTemplate flv_sink_template = GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("video/x-flv")
);
static GstStaticPadTemplate audio_src_template =
GST_STATIC_PAD_TEMPLATE ("audio",
GST_PAD_SRC,
GST_PAD_SOMETIMES,
GST_STATIC_CAPS_ANY);
static GstStaticPadTemplate video_src_template =
GST_STATIC_PAD_TEMPLATE ("video",
GST_PAD_SRC,
GST_PAD_SOMETIMES,
GST_STATIC_CAPS_ANY);
GST_DEBUG_CATEGORY (flvdemux_debug);
#define GST_CAT_DEFAULT flvdemux_debug
GST_BOILERPLATE (GstFLVDemux, gst_flv_demux, GstElement, GST_TYPE_ELEMENT);
/* 9 bytes of header + 4 bytes of first previous tag size */
#define FLV_HEADER_SIZE 13
/* 1 byte of tag type + 3 bytes of tag data size */
#define FLV_TAG_TYPE_SIZE 4
static gboolean flv_demux_handle_seek_push (GstFLVDemux * demux,
GstEvent * event);
static gboolean gst_flv_demux_handle_seek_pull (GstFLVDemux * demux,
GstEvent * event, gboolean seeking);
static void
gst_flv_demux_flush (GstFLVDemux * demux, gboolean discont)
{
GST_DEBUG_OBJECT (demux, "flushing queued data in the FLV demuxer");
gst_adapter_clear (demux->adapter);
demux->audio_need_discont = TRUE;
demux->video_need_discont = TRUE;
demux->flushing = FALSE;
/* Only in push mode and if we're not during a seek */
if (!demux->random_access && demux->state != FLV_STATE_SEEK) {
/* After a flush we expect a tag_type */
demux->state = FLV_STATE_TAG_TYPE;
/* We reset the offset and will get one from first push */
demux->offset = 0;
}
}
static void
gst_flv_demux_cleanup (GstFLVDemux * demux)
{
GST_DEBUG_OBJECT (demux, "cleaning up FLV demuxer");
demux->state = FLV_STATE_HEADER;
demux->flushing = FALSE;
demux->need_header = TRUE;
demux->audio_need_segment = TRUE;
demux->video_need_segment = TRUE;
demux->audio_need_discont = TRUE;
demux->video_need_discont = TRUE;
/* By default we consider them as linked */
demux->audio_linked = TRUE;
demux->video_linked = TRUE;
demux->has_audio = FALSE;
demux->has_video = FALSE;
demux->push_tags = FALSE;
demux->got_par = FALSE;
demux->indexed = FALSE;
demux->file_size = 0;
demux->index_max_pos = 0;
demux->index_max_time = 0;
demux->audio_start = demux->video_start = GST_CLOCK_TIME_NONE;
demux->no_more_pads = FALSE;
gst_segment_init (&demux->segment, GST_FORMAT_TIME);
demux->w = demux->h = 0;
demux->par_x = demux->par_y = 1;
demux->video_offset = 0;
demux->audio_offset = 0;
demux->offset = demux->cur_tag_offset = 0;
demux->tag_size = demux->tag_data_size = 0;
demux->duration = GST_CLOCK_TIME_NONE;
if (demux->new_seg_event) {
gst_event_unref (demux->new_seg_event);
demux->new_seg_event = NULL;
}
if (demux->close_seg_event) {
gst_event_unref (demux->close_seg_event);
demux->close_seg_event = NULL;
}
gst_adapter_clear (demux->adapter);
if (demux->audio_codec_data) {
gst_buffer_unref (demux->audio_codec_data);
demux->audio_codec_data = NULL;
}
if (demux->video_codec_data) {
gst_buffer_unref (demux->video_codec_data);
demux->video_codec_data = NULL;
}
if (demux->audio_pad) {
gst_element_remove_pad (GST_ELEMENT (demux), demux->audio_pad);
gst_object_unref (demux->audio_pad);
demux->audio_pad = NULL;
}
if (demux->video_pad) {
gst_element_remove_pad (GST_ELEMENT (demux), demux->video_pad);
gst_object_unref (demux->video_pad);
demux->video_pad = NULL;
}
if (demux->times) {
g_array_free (demux->times, TRUE);
demux->times = NULL;
}
if (demux->filepositions) {
g_array_free (demux->filepositions, TRUE);
demux->filepositions = NULL;
}
}
/*
* Create and push a flushing seek event upstream
*/
static gboolean
flv_demux_seek_to_offset (GstFLVDemux * demux, guint64 offset)
{
GstEvent *event;
gboolean res = 0;
GST_DEBUG_OBJECT (demux, "Seeking to %" G_GUINT64_FORMAT, offset);
event =
gst_event_new_seek (1.0, GST_FORMAT_BYTES,
GST_SEEK_FLAG_FLUSH | GST_SEEK_FLAG_ACCURATE, GST_SEEK_TYPE_SET, offset,
GST_SEEK_TYPE_NONE, -1);
res = gst_pad_push_event (demux->sinkpad, event);
if (res)
demux->offset = offset;
return res;
}
static GstFlowReturn
gst_flv_demux_chain (GstPad * pad, GstBuffer * buffer)
{
GstFlowReturn ret = GST_FLOW_OK;
GstFLVDemux *demux = NULL;
demux = GST_FLV_DEMUX (gst_pad_get_parent (pad));
GST_LOG_OBJECT (demux, "received buffer of %d bytes at offset %"
G_GUINT64_FORMAT, GST_BUFFER_SIZE (buffer), GST_BUFFER_OFFSET (buffer));
if (G_UNLIKELY (GST_BUFFER_OFFSET (buffer) == 0)) {
GST_DEBUG_OBJECT (demux, "beginning of file, expect header");
demux->state = FLV_STATE_HEADER;
demux->offset = 0;
}
if (G_UNLIKELY (demux->offset == 0 && GST_BUFFER_OFFSET (buffer) != 0)) {
GST_DEBUG_OBJECT (demux, "offset was zero, synchronizing with buffer's");
demux->offset = GST_BUFFER_OFFSET (buffer);
}
gst_adapter_push (demux->adapter, buffer);
if (demux->seeking) {
demux->state = FLV_STATE_SEEK;
GST_OBJECT_LOCK (demux);
demux->seeking = FALSE;
GST_OBJECT_UNLOCK (demux);
}
parse:
if (G_UNLIKELY (ret != GST_FLOW_OK)) {
if (ret == GST_FLOW_NOT_LINKED && (demux->audio_linked
|| demux->video_linked)) {
ret = GST_FLOW_OK;
} else {
GST_DEBUG_OBJECT (demux, "got flow return %s", gst_flow_get_name (ret));
goto beach;
}
}
if (G_UNLIKELY (demux->flushing)) {
GST_DEBUG_OBJECT (demux, "we are now flushing, exiting parser loop");
ret = GST_FLOW_WRONG_STATE;
goto beach;
}
switch (demux->state) {
case FLV_STATE_HEADER:
{
if (gst_adapter_available (demux->adapter) >= FLV_HEADER_SIZE) {
GstBuffer *buffer;
buffer = gst_adapter_take_buffer (demux->adapter, FLV_HEADER_SIZE);
ret = gst_flv_parse_header (demux, buffer);
gst_buffer_unref (buffer);
demux->offset += FLV_HEADER_SIZE;
demux->state = FLV_STATE_TAG_TYPE;
goto parse;
} else {
goto beach;
}
}
case FLV_STATE_TAG_TYPE:
{
if (gst_adapter_available (demux->adapter) >= FLV_TAG_TYPE_SIZE) {
GstBuffer *buffer;
/* Remember the tag offset in bytes */
demux->cur_tag_offset = demux->offset;
buffer = gst_adapter_take_buffer (demux->adapter, FLV_TAG_TYPE_SIZE);
ret = gst_flv_parse_tag_type (demux, buffer);
gst_buffer_unref (buffer);
demux->offset += FLV_TAG_TYPE_SIZE;
/* last tag is not an index => no index/don't know where the index is
* seek back to the beginning */
if (demux->seek_event && demux->state != FLV_STATE_TAG_SCRIPT)
goto no_index;
goto parse;
} else {
goto beach;
}
}
case FLV_STATE_TAG_VIDEO:
{
if (gst_adapter_available (demux->adapter) >= demux->tag_size) {
GstBuffer *buffer;
buffer = gst_adapter_take_buffer (demux->adapter, demux->tag_size);
ret = gst_flv_parse_tag_video (demux, buffer);
gst_buffer_unref (buffer);
demux->offset += demux->tag_size;
demux->state = FLV_STATE_TAG_TYPE;
goto parse;
} else {
goto beach;
}
}
case FLV_STATE_TAG_AUDIO:
{
if (gst_adapter_available (demux->adapter) >= demux->tag_size) {
GstBuffer *buffer;
buffer = gst_adapter_take_buffer (demux->adapter, demux->tag_size);
ret = gst_flv_parse_tag_audio (demux, buffer);
gst_buffer_unref (buffer);
demux->offset += demux->tag_size;
demux->state = FLV_STATE_TAG_TYPE;
goto parse;
} else {
goto beach;
}
}
case FLV_STATE_TAG_SCRIPT:
{
if (gst_adapter_available (demux->adapter) >= demux->tag_size) {
GstBuffer *buffer;
buffer = gst_adapter_take_buffer (demux->adapter, demux->tag_size);
ret = gst_flv_parse_tag_script (demux, buffer);
gst_buffer_unref (buffer);
demux->offset += demux->tag_size;
demux->state = FLV_STATE_TAG_TYPE;
/* if there's a seek event we're here for the index so if we don't have it
* we seek back to the beginning */
if (demux->seek_event) {
if (demux->indexed)
demux->state = FLV_STATE_SEEK;
else
goto no_index;
}
goto parse;
} else {
goto beach;
}
}
case FLV_STATE_SEEK:
{
GstEvent *event;
ret = GST_FLOW_OK;
if (!demux->indexed) {
if (demux->offset == demux->file_size - sizeof (guint32)) {
GstBuffer *buffer =
gst_adapter_take_buffer (demux->adapter, sizeof (guint32));
GstByteReader *reader = gst_byte_reader_new_from_buffer (buffer);
guint64 seek_offset;
if (!gst_adapter_available (demux->adapter) >= sizeof (guint32)) {
/* error */
}
seek_offset =
demux->file_size - sizeof (guint32) -
gst_byte_reader_peek_uint32_be_unchecked (reader);
gst_byte_reader_free (reader);
gst_buffer_unref (buffer);
GST_INFO_OBJECT (demux,
"Seeking to beginning of last tag at %" G_GUINT64_FORMAT,
seek_offset);
demux->state = FLV_STATE_TAG_TYPE;
flv_demux_seek_to_offset (demux, seek_offset);
goto beach;
} else
goto no_index;
}
GST_OBJECT_LOCK (demux);
event = demux->seek_event;
demux->seek_event = NULL;
GST_OBJECT_UNLOCK (demux);
/* calculate and perform seek */
if (!flv_demux_handle_seek_push (demux, event))
goto seek_failed;
gst_event_unref (event);
demux->state = FLV_STATE_TAG_TYPE;
goto beach;
}
default:
GST_DEBUG_OBJECT (demux, "unexpected demuxer state");
}
beach:
if (G_UNLIKELY (ret == GST_FLOW_NOT_LINKED)) {
/* If either audio or video is linked we return GST_FLOW_OK */
if (demux->audio_linked || demux->video_linked) {
ret = GST_FLOW_OK;
}
}
gst_object_unref (demux);
return ret;
/* ERRORS */
no_index:
{
GST_OBJECT_LOCK (demux);
demux->seeking = FALSE;
gst_event_unref (demux->seek_event);
demux->seek_event = NULL;
GST_OBJECT_UNLOCK (demux);
GST_WARNING_OBJECT (demux,
"failed to find an index, seeking back to beginning");
flv_demux_seek_to_offset (demux, 0);
return GST_FLOW_OK;
}
seek_failed:
{
GST_ELEMENT_ERROR (demux, STREAM, DEMUX, (NULL), ("seek failed"));
return GST_FLOW_ERROR;
}
}
static GstFlowReturn
gst_flv_demux_pull_range (GstFLVDemux * demux, GstPad * pad, guint64 offset,
guint size, GstBuffer ** buffer)
{
GstFlowReturn ret;
ret = gst_pad_pull_range (pad, offset, size, buffer);
if (G_UNLIKELY (ret != GST_FLOW_OK)) {
GST_WARNING_OBJECT (demux,
"failed when pulling %d bytes from offset %" G_GUINT64_FORMAT ": %s",
size, offset, gst_flow_get_name (ret));
*buffer = NULL;
return ret;
}
if (G_UNLIKELY (*buffer && GST_BUFFER_SIZE (*buffer) != size)) {
GST_WARNING_OBJECT (demux,
"partial pull got %d when expecting %d from offset %" G_GUINT64_FORMAT,
GST_BUFFER_SIZE (*buffer), size, offset);
gst_buffer_unref (*buffer);
ret = GST_FLOW_UNEXPECTED;
*buffer = NULL;
return ret;
}
return ret;
}
static GstFlowReturn
gst_flv_demux_pull_tag (GstPad * pad, GstFLVDemux * demux)
{
GstBuffer *buffer = NULL;
GstFlowReturn ret = GST_FLOW_OK;
/* Store tag offset */
demux->cur_tag_offset = demux->offset;
/* Get the first 4 bytes to identify tag type and size */
if (G_UNLIKELY ((ret = gst_flv_demux_pull_range (demux, pad, demux->offset,
FLV_TAG_TYPE_SIZE, &buffer)) != GST_FLOW_OK))
goto beach;
/* Identify tag type */
ret = gst_flv_parse_tag_type (demux, buffer);
gst_buffer_unref (buffer);
if (G_UNLIKELY (ret != GST_FLOW_OK))
goto beach;
/* Jump over tag type + size */
demux->offset += FLV_TAG_TYPE_SIZE;
/* Pull the whole tag */
if (G_UNLIKELY ((ret = gst_flv_demux_pull_range (demux, pad, demux->offset,
demux->tag_size, &buffer)) != GST_FLOW_OK))
goto beach;
switch (demux->state) {
case FLV_STATE_TAG_VIDEO:
ret = gst_flv_parse_tag_video (demux, buffer);
break;
case FLV_STATE_TAG_AUDIO:
ret = gst_flv_parse_tag_audio (demux, buffer);
break;
case FLV_STATE_TAG_SCRIPT:
ret = gst_flv_parse_tag_script (demux, buffer);
break;
default:
GST_WARNING_OBJECT (demux, "unexpected state %d", demux->state);
}
gst_buffer_unref (buffer);
/* Jump over that part we've just parsed */
demux->offset += demux->tag_size;
/* Make sure we reinitialize the tag size */
demux->tag_size = 0;
/* Ready for the next tag */
demux->state = FLV_STATE_TAG_TYPE;
if (G_UNLIKELY (ret == GST_FLOW_NOT_LINKED)) {
/* If either audio or video is linked we return GST_FLOW_OK */
if (demux->audio_linked || demux->video_linked) {
ret = GST_FLOW_OK;
} else {
GST_WARNING_OBJECT (demux, "parsing this tag returned not-linked and "
"neither video nor audio are linked");
}
}
beach:
return ret;
}
static GstFlowReturn
gst_flv_demux_pull_header (GstPad * pad, GstFLVDemux * demux)
{
GstBuffer *buffer = NULL;
GstFlowReturn ret = GST_FLOW_OK;
/* Get the first 9 bytes */
if (G_UNLIKELY ((ret = gst_flv_demux_pull_range (demux, pad, demux->offset,
FLV_HEADER_SIZE, &buffer)) != GST_FLOW_OK))
goto beach;
ret = gst_flv_parse_header (demux, buffer);
gst_buffer_unref (buffer);
/* Jump over the header now */
demux->offset += FLV_HEADER_SIZE;
demux->state = FLV_STATE_TAG_TYPE;
beach:
return ret;
}
static void
gst_flv_demux_move_to_offset (GstFLVDemux * demux, gint64 offset,
gboolean reset)
{
demux->offset = offset;
/* Tell all the stream we moved to a different position (discont) */
demux->audio_need_discont = TRUE;
demux->video_need_discont = TRUE;
/* next section setup */
demux->from_offset = -1;
demux->audio_done = demux->video_done = FALSE;
demux->audio_first_ts = demux->video_first_ts = GST_CLOCK_TIME_NONE;
if (reset) {
demux->from_offset = -1;
demux->to_offset = G_MAXINT64;
}
/* If we seeked at the beginning of the file parse the header again */
if (G_UNLIKELY (!demux->offset)) {
demux->state = FLV_STATE_HEADER;
} else { /* or parse a tag */
demux->state = FLV_STATE_TAG_TYPE;
}
}
static GstFlowReturn
gst_flv_demux_seek_to_prev_keyframe (GstFLVDemux * demux)
{
GstFlowReturn ret = GST_FLOW_UNEXPECTED;
GstIndexEntry *entry = NULL;
GST_DEBUG_OBJECT (demux,
"terminated section started at offset %" G_GINT64_FORMAT,
demux->from_offset);
/* we are done if we got all audio and video */
if ((!GST_CLOCK_TIME_IS_VALID (demux->audio_first_ts) ||
demux->audio_first_ts < demux->segment.start) &&
(!GST_CLOCK_TIME_IS_VALID (demux->video_first_ts) ||
demux->video_first_ts < demux->segment.start))
goto done;
if (demux->from_offset <= 0)
goto done;
GST_DEBUG_OBJECT (demux, "locating previous position");
/* locate index entry before previous start position */
if (demux->index)
entry = gst_index_get_assoc_entry (demux->index, demux->index_id,
GST_INDEX_LOOKUP_BEFORE, GST_ASSOCIATION_FLAG_KEY_UNIT,
GST_FORMAT_BYTES, demux->from_offset - 1);
if (entry) {
gint64 bytes, time;
gst_index_entry_assoc_map (entry, GST_FORMAT_BYTES, &bytes);
gst_index_entry_assoc_map (entry, GST_FORMAT_TIME, &time);
GST_DEBUG_OBJECT (demux, "found index entry for %" G_GINT64_FORMAT
" at %" GST_TIME_FORMAT ", seeking to %" G_GINT64_FORMAT,
demux->offset - 1, GST_TIME_ARGS (time), bytes);
/* setup for next section */
demux->to_offset = demux->from_offset;
gst_flv_demux_move_to_offset (demux, bytes, FALSE);
ret = GST_FLOW_OK;
}
done:
return ret;
}
static gboolean
gst_flv_demux_push_src_event (GstFLVDemux * demux, GstEvent * event)
{
gboolean ret = TRUE;
if (demux->audio_pad)
ret |= gst_pad_push_event (demux->audio_pad, gst_event_ref (event));
if (demux->video_pad)
ret |= gst_pad_push_event (demux->video_pad, gst_event_ref (event));
gst_event_unref (event);
return ret;
}
static GstFlowReturn
gst_flv_demux_create_index (GstFLVDemux * demux, gint64 pos, GstClockTime ts)
{
gint64 size;
GstFormat fmt = GST_FORMAT_BYTES;
size_t tag_size;
guint64 old_offset;
GstBuffer *buffer;
GstClockTime tag_time;
GstFlowReturn ret = GST_FLOW_OK;
if (G_UNLIKELY (!gst_pad_query_peer_duration (demux->sinkpad, &fmt, &size) ||
fmt != GST_FORMAT_BYTES))
return GST_FLOW_OK;
GST_DEBUG_OBJECT (demux, "building index at %" G_GINT64_FORMAT
" looking for time %" GST_TIME_FORMAT, pos, GST_TIME_ARGS (ts));
old_offset = demux->offset;
demux->offset = pos;
while ((ret = gst_flv_demux_pull_range (demux, demux->sinkpad, demux->offset,
12, &buffer)) == GST_FLOW_OK) {
tag_time = gst_flv_parse_tag_timestamp (demux, TRUE, buffer, &tag_size);
gst_buffer_unref (buffer);
if (G_UNLIKELY (tag_time == GST_CLOCK_TIME_NONE || tag_time > ts))
goto exit;
demux->offset += tag_size;
}
if (ret == GST_FLOW_UNEXPECTED) {
/* file ran out, so mark we have complete index */
demux->indexed = TRUE;
ret = GST_FLOW_OK;
}
exit:
demux->offset = old_offset;
return ret;
}
static gint64
gst_flv_demux_get_metadata (GstFLVDemux * demux)
{
gint64 ret = 0, offset;
GstFormat fmt = GST_FORMAT_BYTES;
size_t tag_size, size;
GstBuffer *buffer = NULL;
if (G_UNLIKELY (!gst_pad_query_peer_duration (demux->sinkpad, &fmt, &offset)
|| fmt != GST_FORMAT_BYTES))
goto exit;
ret = offset;
GST_DEBUG_OBJECT (demux, "upstream size: %" G_GINT64_FORMAT, offset);
if (G_UNLIKELY (offset < 4))
goto exit;
offset -= 4;
if (GST_FLOW_OK != gst_flv_demux_pull_range (demux, demux->sinkpad, offset,
4, &buffer))
goto exit;
tag_size = GST_READ_UINT32_BE (GST_BUFFER_DATA (buffer));
GST_DEBUG_OBJECT (demux, "last tag size: %" G_GSIZE_FORMAT, tag_size);
gst_buffer_unref (buffer);
buffer = NULL;
offset -= tag_size;
if (GST_FLOW_OK != gst_flv_demux_pull_range (demux, demux->sinkpad, offset,
12, &buffer))
goto exit;
/* a consistency check */
size = GST_READ_UINT24_BE (GST_BUFFER_DATA (buffer) + 1);
if (size != tag_size - 11) {
GST_DEBUG_OBJECT (demux,
"tag size %" G_GSIZE_FORMAT ", expected %" G_GSIZE_FORMAT
", corrupt or truncated file", size, tag_size - 11);
goto exit;
}
/* try to update duration with timestamp in any case */
gst_flv_parse_tag_timestamp (demux, FALSE, buffer, &size);
/* maybe get some more metadata */
if (GST_BUFFER_DATA (buffer)[0] == 18) {
gst_buffer_unref (buffer);
buffer = NULL;
GST_DEBUG_OBJECT (demux, "script tag, pulling it to parse");
offset += 4;
if (GST_FLOW_OK == gst_flv_demux_pull_range (demux, demux->sinkpad, offset,
tag_size, &buffer))
gst_flv_parse_tag_script (demux, buffer);
}
exit:
if (buffer)
gst_buffer_unref (buffer);
return ret;
}
static void
gst_flv_demux_loop (GstPad * pad)
{
GstFLVDemux *demux = NULL;
GstFlowReturn ret = GST_FLOW_OK;
demux = GST_FLV_DEMUX (gst_pad_get_parent (pad));
/* pull in data */
switch (demux->state) {
case FLV_STATE_TAG_TYPE:
if (demux->from_offset == -1)
demux->from_offset = demux->offset;
ret = gst_flv_demux_pull_tag (pad, demux);
/* if we have seen real data, we probably passed a possible metadata
* header located at start. So if we do not yet have an index,
* try to pick up metadata (index, duration) at the end */
if (G_UNLIKELY (!demux->file_size && !demux->indexed &&
(demux->has_video || demux->has_audio)))
demux->file_size = gst_flv_demux_get_metadata (demux);
break;
case FLV_STATE_DONE:
ret = GST_FLOW_UNEXPECTED;
break;
case FLV_STATE_SEEK:
/* seek issued with insufficient index;
* scan for index in task thread from current maximum offset to
* desired time and then perform seek */
/* TODO maybe some buffering message or so to indicate scan progress */
ret = gst_flv_demux_create_index (demux, demux->index_max_pos,
demux->seek_time);
if (ret != GST_FLOW_OK)
goto pause;
/* position and state arranged by seek,
* also unrefs event */
gst_flv_demux_handle_seek_pull (demux, demux->seek_event, FALSE);
demux->seek_event = NULL;
break;
default:
ret = gst_flv_demux_pull_header (pad, demux);
/* index scans start after header */
demux->index_max_pos = demux->offset;
break;
}
if (demux->segment.rate < 0.0) {
/* check end of section */
if ((gint64) demux->offset >= demux->to_offset ||
demux->segment.last_stop >= demux->segment.stop + 2 * GST_SECOND ||
(demux->audio_done && demux->video_done))
ret = gst_flv_demux_seek_to_prev_keyframe (demux);
} else {
/* check EOS condition */
if ((demux->segment.stop != -1) &&
(demux->segment.last_stop >= demux->segment.stop)) {
ret = GST_FLOW_UNEXPECTED;
}
}
/* pause if something went wrong or at end */
if (G_UNLIKELY (ret != GST_FLOW_OK))
goto pause;
gst_object_unref (demux);
return;
pause:
{
const gchar *reason = gst_flow_get_name (ret);
GST_LOG_OBJECT (demux, "pausing task, reason %s", reason);
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 (!demux->no_more_pads) {
gst_element_no_more_pads (GST_ELEMENT_CAST (demux));
demux->no_more_pads = TRUE;
}
if (demux->segment.flags & GST_SEEK_FLAG_SEGMENT) {
gint64 stop;
/* for segment playback we need to post when (in stream time)
* we stopped, this is either stop (when set) or the duration. */
if ((stop = demux->segment.stop) == -1)
stop = demux->segment.duration;
if (demux->segment.rate >= 0) {
GST_LOG_OBJECT (demux, "Sending segment done, at end of segment");
gst_element_post_message (GST_ELEMENT_CAST (demux),
gst_message_new_segment_done (GST_OBJECT_CAST (demux),
GST_FORMAT_TIME, stop));
} else { /* Reverse playback */
GST_LOG_OBJECT (demux, "Sending segment done, at beginning of "
"segment");
gst_element_post_message (GST_ELEMENT_CAST (demux),
gst_message_new_segment_done (GST_OBJECT_CAST (demux),
GST_FORMAT_TIME, demux->segment.start));
}
} else {
/* normal playback, send EOS to all linked pads */
if (!demux->no_more_pads) {
gst_element_no_more_pads (GST_ELEMENT (demux));
demux->no_more_pads = TRUE;
}
GST_LOG_OBJECT (demux, "Sending EOS, at end of stream");
if (!gst_flv_demux_push_src_event (demux, gst_event_new_eos ()))
GST_WARNING_OBJECT (demux, "failed pushing EOS on streams");
}
} else {
GST_ELEMENT_ERROR (demux, STREAM, FAILED,
("Internal data stream error."),
("stream stopped, reason %s", reason));
gst_flv_demux_push_src_event (demux, gst_event_new_eos ());
}
}
gst_object_unref (demux);
return;
}
}
static guint64
gst_flv_demux_find_offset (GstFLVDemux * demux, GstSegment * segment)
{
gint64 bytes = 0;
gint64 time = 0;
GstIndexEntry *entry;
g_return_val_if_fail (segment != NULL, 0);
time = segment->last_stop;
if (demux->index) {
/* Let's check if we have an index entry for that seek time */
entry = gst_index_get_assoc_entry (demux->index, demux->index_id,
GST_INDEX_LOOKUP_BEFORE, GST_ASSOCIATION_FLAG_KEY_UNIT,
GST_FORMAT_TIME, time);
if (entry) {
gst_index_entry_assoc_map (entry, GST_FORMAT_BYTES, &bytes);
gst_index_entry_assoc_map (entry, GST_FORMAT_TIME, &time);
GST_DEBUG_OBJECT (demux, "found index entry for %" GST_TIME_FORMAT
" at %" GST_TIME_FORMAT ", seeking to %" G_GINT64_FORMAT,
GST_TIME_ARGS (segment->last_stop), GST_TIME_ARGS (time), bytes);
/* Key frame seeking */
if (segment->flags & GST_SEEK_FLAG_KEY_UNIT) {
/* Adjust the segment so that the keyframe fits in */
if (time < segment->start) {
segment->start = segment->time = time;
}
segment->last_stop = time;
}
} else {
GST_DEBUG_OBJECT (demux, "no index entry found for %" GST_TIME_FORMAT,
GST_TIME_ARGS (segment->start));
}
}
return bytes;
}
static gboolean
flv_demux_handle_seek_push (GstFLVDemux * demux, GstEvent * event)
{
GstFormat format;
GstSeekFlags flags;
GstSeekType start_type, stop_type;
gint64 start, stop;
gdouble rate;
gboolean update, flush, keyframe, ret;
GstSegment seeksegment;
gst_event_parse_seek (event, &rate, &format, &flags,
&start_type, &start, &stop_type, &stop);
if (format != GST_FORMAT_TIME)
goto wrong_format;
flush = !!(flags & GST_SEEK_FLAG_FLUSH);
/* FIXME : the keyframe flag is never used ! */
keyframe = !!(flags & GST_SEEK_FLAG_KEY_UNIT);
/* Work on a copy until we are sure the seek succeeded. */
memcpy (&seeksegment, &demux->segment, sizeof (GstSegment));
GST_DEBUG_OBJECT (demux, "segment before configure %" GST_SEGMENT_FORMAT,
&demux->segment);
/* Apply the seek to our segment */
gst_segment_set_seek (&seeksegment, rate, format, flags,
start_type, start, stop_type, stop, &update);
GST_DEBUG_OBJECT (demux, "segment configured %" GST_SEGMENT_FORMAT,
&seeksegment);
if (flush || seeksegment.last_stop != demux->segment.last_stop) {
/* Do the actual seeking */
guint64 offset = gst_flv_demux_find_offset (demux, &seeksegment);
GST_DEBUG_OBJECT (demux, "generating an upstream seek at position %"
G_GUINT64_FORMAT, offset);
ret = gst_pad_push_event (demux->sinkpad,
gst_event_new_seek (seeksegment.rate, GST_FORMAT_BYTES,
seeksegment.flags | GST_SEEK_FLAG_ACCURATE, GST_SEEK_TYPE_SET,
offset, GST_SEEK_TYPE_NONE, 0));
if (G_UNLIKELY (!ret)) {
GST_WARNING_OBJECT (demux, "upstream seek failed");
}
/* Tell all the stream we moved to a different position (discont) */
demux->audio_need_discont = TRUE;
demux->video_need_discont = TRUE;
} else {
ret = TRUE;
}
if (ret) {
/* Ok seek succeeded, take the newly configured segment */
memcpy (&demux->segment, &seeksegment, sizeof (GstSegment));
/* Tell all the stream a new segment is needed */
demux->audio_need_segment = TRUE;
demux->video_need_segment = TRUE;
/* Clean any potential newsegment event kept for the streams. The first
* stream needing a new segment will create a new one. */
if (G_UNLIKELY (demux->new_seg_event)) {
gst_event_unref (demux->new_seg_event);
demux->new_seg_event = NULL;
}
gst_event_unref (event);
} else {
ret = gst_pad_push_event (demux->sinkpad, event);
}
return ret;
/* ERRORS */
wrong_format:
{
GST_WARNING_OBJECT (demux, "we only support seeking in TIME format");
return gst_pad_push_event (demux->sinkpad, event);
}
}
static gboolean
gst_flv_demux_handle_seek_push (GstFLVDemux * demux, GstEvent * event)
{
if (!demux->indexed) {
guint64 seek_offset = 0;
gboolean building_index;
GstFormat fmt;
GST_OBJECT_LOCK (demux);
/* handle the seek in the chain function */
demux->seeking = TRUE;
demux->state = FLV_STATE_SEEK;
/* copy the event */
if (demux->seek_event)
gst_event_unref (demux->seek_event);
demux->seek_event = gst_event_ref (event);
/* set the building_index flag so that only one thread can setup the
* structures for index seeking. */
building_index = demux->building_index;
if (!building_index) {
demux->building_index = TRUE;
fmt = GST_FORMAT_BYTES;
if (!demux->file_size
&& !gst_pad_query_peer_duration (demux->sinkpad, &fmt,
&demux->file_size)) {
GST_WARNING_OBJECT (demux,
"Cannot obtain file size - %" G_GINT64_FORMAT ", format %u",
demux->file_size, fmt);
GST_OBJECT_UNLOCK (demux);
return FALSE;
}
/* we hope the last tag is a scriptdataobject containing an index
* the size of the last tag is given in the last guint32 bits
* then we seek to the beginning of the tag, parse it and hopefully obtain an index */
seek_offset = demux->file_size - sizeof (guint32);
GST_DEBUG_OBJECT (demux,
"File size obtained, seeking to %" G_GUINT64_FORMAT, seek_offset);
}
GST_OBJECT_UNLOCK (demux);
if (!building_index) {
GST_INFO_OBJECT (demux, "Seeking to last 4 bytes at %" G_GUINT64_FORMAT,
seek_offset);
return flv_demux_seek_to_offset (demux, seek_offset);
}
/* FIXME: we have to always return true so that we don't block the seek
* thread.
* Note: maybe it is OK to return true if we're still building the index */
return TRUE;
}
return flv_demux_handle_seek_push (demux, event);
}
static gboolean
gst_flv_demux_handle_seek_pull (GstFLVDemux * demux, GstEvent * event,
gboolean seeking)
{
GstFormat format;
GstSeekFlags flags;
GstSeekType start_type, stop_type;
gint64 start, stop;
gdouble rate;
gboolean update, flush, keyframe, ret = FALSE;
GstSegment seeksegment;
gst_event_parse_seek (event, &rate, &format, &flags,
&start_type, &start, &stop_type, &stop);
if (format != GST_FORMAT_TIME)
goto wrong_format;
/* mark seeking thread entering flushing/pausing */
GST_OBJECT_LOCK (demux);
if (seeking)
demux->seeking = seeking;
GST_OBJECT_UNLOCK (demux);
flush = !!(flags & GST_SEEK_FLAG_FLUSH);
/* FIXME : the keyframe flag is never used */
keyframe = !!(flags & GST_SEEK_FLAG_KEY_UNIT);
if (flush) {
/* Flush start up and downstream to make sure data flow and loops are
idle */
gst_flv_demux_push_src_event (demux, gst_event_new_flush_start ());
gst_pad_push_event (demux->sinkpad, gst_event_new_flush_start ());
} else {
/* Pause the pulling task */
gst_pad_pause_task (demux->sinkpad);
}
/* Take the stream lock */
GST_PAD_STREAM_LOCK (demux->sinkpad);
if (flush) {
/* Stop flushing upstream we need to pull */
gst_pad_push_event (demux->sinkpad, gst_event_new_flush_stop ());
}
/* Work on a copy until we are sure the seek succeeded. */
memcpy (&seeksegment, &demux->segment, sizeof (GstSegment));
GST_DEBUG_OBJECT (demux, "segment before configure %" GST_SEGMENT_FORMAT,
&demux->segment);
/* Apply the seek to our segment */
gst_segment_set_seek (&seeksegment, rate, format, flags,
start_type, start, stop_type, stop, &update);
GST_DEBUG_OBJECT (demux, "segment configured %" GST_SEGMENT_FORMAT,
&seeksegment);
if (flush || seeksegment.last_stop != demux->segment.last_stop) {
/* Do the actual seeking */
/* index is reliable if it is complete or we do not go to far ahead */
if (seeking && !demux->indexed &&
seeksegment.last_stop > demux->index_max_time + 10 * GST_SECOND) {
GST_DEBUG_OBJECT (demux, "delaying seek to post-scan; "
" index only up to %" GST_TIME_FORMAT,
GST_TIME_ARGS (demux->index_max_time));
/* stop flushing for now */
if (flush)
gst_flv_demux_push_src_event (demux, gst_event_new_flush_stop ());
/* delegate scanning and index building to task thread to avoid
* occupying main (UI) loop */
if (demux->seek_event)
gst_event_unref (demux->seek_event);
demux->seek_event = gst_event_ref (event);
demux->seek_time = seeksegment.last_stop;
demux->state = FLV_STATE_SEEK;
goto exit;
}
/* now index should be as reliable as it can be for current purpose */
gst_flv_demux_move_to_offset (demux,
gst_flv_demux_find_offset (demux, &seeksegment), TRUE);
ret = TRUE;
} else {
ret = TRUE;
}
if (G_UNLIKELY (demux->close_seg_event)) {
gst_event_unref (demux->close_seg_event);
demux->close_seg_event = NULL;
}
if (flush) {
/* Stop flushing, the sinks are at time 0 now */
gst_flv_demux_push_src_event (demux, gst_event_new_flush_stop ());
} else {
GST_DEBUG_OBJECT (demux, "closing running segment %" GST_SEGMENT_FORMAT,
&demux->segment);
/* Close the current segment for a linear playback */
if (demux->segment.rate >= 0) {
/* for forward playback, we played from start to last_stop */
demux->close_seg_event = gst_event_new_new_segment (TRUE,
demux->segment.rate, demux->segment.format,
demux->segment.start, demux->segment.last_stop, demux->segment.time);
} else {
gint64 stop;
if ((stop = demux->segment.stop) == -1)
stop = demux->segment.duration;
/* for reverse playback, we played from stop to last_stop. */
demux->close_seg_event = gst_event_new_new_segment (TRUE,
demux->segment.rate, demux->segment.format,
demux->segment.last_stop, stop, demux->segment.last_stop);
}
}
if (ret) {
/* Ok seek succeeded, take the newly configured segment */
memcpy (&demux->segment, &seeksegment, sizeof (GstSegment));
/* Notify about the start of a new segment */
if (demux->segment.flags & GST_SEEK_FLAG_SEGMENT) {
gst_element_post_message (GST_ELEMENT (demux),
gst_message_new_segment_start (GST_OBJECT (demux),
demux->segment.format, demux->segment.last_stop));
}
/* Tell all the stream a new segment is needed */
demux->audio_need_segment = TRUE;
demux->video_need_segment = TRUE;
/* Clean any potential newsegment event kept for the streams. The first
* stream needing a new segment will create a new one. */
if (G_UNLIKELY (demux->new_seg_event)) {
gst_event_unref (demux->new_seg_event);
demux->new_seg_event = NULL;
}
if (demux->segment.rate < 0.0) {
/* we can't generate a segment by locking on
* to the first timestamp we see */
GST_DEBUG_OBJECT (demux, "preparing newsegment from %"
GST_TIME_FORMAT " to %" GST_TIME_FORMAT,
GST_TIME_ARGS (demux->segment.start),
GST_TIME_ARGS (demux->segment.stop));
demux->new_seg_event =
gst_event_new_new_segment (FALSE, demux->segment.rate,
demux->segment.format, demux->segment.start,
demux->segment.stop, demux->segment.start);
}
}
exit:
GST_OBJECT_LOCK (demux);
seeking = demux->seeking && !seeking;
demux->seeking = FALSE;
GST_OBJECT_UNLOCK (demux);
/* if we detect an external seek having started (and possibly already having
* flushed), do not restart task to give it a chance.
* Otherwise external one's flushing will take care to pause task */
if (seeking) {
gst_pad_pause_task (demux->sinkpad);
} else {
gst_pad_start_task (demux->sinkpad,
(GstTaskFunction) gst_flv_demux_loop, demux->sinkpad);
}
GST_PAD_STREAM_UNLOCK (demux->sinkpad);
gst_event_unref (event);
return ret;
/* ERRORS */
wrong_format:
{
GST_WARNING_OBJECT (demux, "we only support seeking in TIME format");
gst_event_unref (event);
return ret;
}
}
/* If we can pull that's prefered */
static gboolean
gst_flv_demux_sink_activate (GstPad * sinkpad)
{
if (gst_pad_check_pull_range (sinkpad)) {
return gst_pad_activate_pull (sinkpad, TRUE);
} else {
return gst_pad_activate_push (sinkpad, TRUE);
}
}
/* This function gets called when we activate ourselves in push mode.
* We cannot seek (ourselves) in the stream */
static gboolean
gst_flv_demux_sink_activate_push (GstPad * sinkpad, gboolean active)
{
GstFLVDemux *demux;
demux = GST_FLV_DEMUX (gst_pad_get_parent (sinkpad));
demux->random_access = FALSE;
gst_object_unref (demux);
return TRUE;
}
/* this function gets called when we activate ourselves in pull mode.
* We can perform random access to the resource and we start a task
* to start reading */
static gboolean
gst_flv_demux_sink_activate_pull (GstPad * sinkpad, gboolean active)
{
GstFLVDemux *demux;
demux = GST_FLV_DEMUX (gst_pad_get_parent (sinkpad));
if (active) {
demux->random_access = TRUE;
gst_object_unref (demux);
return gst_pad_start_task (sinkpad, (GstTaskFunction) gst_flv_demux_loop,
sinkpad);
} else {
demux->random_access = FALSE;
gst_object_unref (demux);
return gst_pad_stop_task (sinkpad);
}
}
static gboolean
gst_flv_demux_sink_event (GstPad * pad, GstEvent * event)
{
GstFLVDemux *demux;
gboolean ret = FALSE;
demux = GST_FLV_DEMUX (gst_pad_get_parent (pad));
GST_DEBUG_OBJECT (demux, "handling event %s", GST_EVENT_TYPE_NAME (event));
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_FLUSH_START:
GST_DEBUG_OBJECT (demux, "trying to force chain function to exit");
demux->flushing = TRUE;
ret = gst_flv_demux_push_src_event (demux, event);
break;
case GST_EVENT_FLUSH_STOP:
GST_DEBUG_OBJECT (demux, "flushing FLV demuxer");
gst_flv_demux_flush (demux, TRUE);
ret = gst_flv_demux_push_src_event (demux, event);
break;
case GST_EVENT_EOS:
GST_DEBUG_OBJECT (demux, "received EOS");
if (demux->index) {
GST_DEBUG_OBJECT (demux, "committing index");
gst_index_commit (demux->index, demux->index_id);
}
if (!demux->no_more_pads) {
gst_element_no_more_pads (GST_ELEMENT (demux));
demux->no_more_pads = TRUE;
}
if (!gst_flv_demux_push_src_event (demux, event))
GST_WARNING_OBJECT (demux, "failed pushing EOS on streams");
ret = TRUE;
break;
case GST_EVENT_NEWSEGMENT:
{
GstFormat format;
gdouble rate;
gint64 start, stop, time;
gboolean update;
GST_DEBUG_OBJECT (demux, "received new segment");
gst_event_parse_new_segment (event, &update, &rate, &format, &start,
&stop, &time);
if (format == GST_FORMAT_TIME) {
/* time segment, this is perfect, copy over the values. */
gst_segment_set_newsegment (&demux->segment, update, rate, format,
start, stop, time);
GST_DEBUG_OBJECT (demux, "NEWSEGMENT: %" GST_SEGMENT_FORMAT,
&demux->segment);
/* and forward */
ret = gst_flv_demux_push_src_event (demux, event);
} else {
/* non-time format */
demux->audio_need_segment = TRUE;
demux->video_need_segment = TRUE;
ret = TRUE;
gst_event_unref (event);
}
break;
}
default:
ret = gst_flv_demux_push_src_event (demux, event);
break;
}
gst_object_unref (demux);
return ret;
}
gboolean
gst_flv_demux_src_event (GstPad * pad, GstEvent * event)
{
GstFLVDemux *demux;
gboolean ret = FALSE;
demux = GST_FLV_DEMUX (gst_pad_get_parent (pad));
GST_DEBUG_OBJECT (demux, "handling event %s", GST_EVENT_TYPE_NAME (event));
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_SEEK:
if (demux->random_access) {
ret = gst_flv_demux_handle_seek_pull (demux, event, TRUE);
} else {
ret = gst_flv_demux_handle_seek_push (demux, event);
}
break;
default:
ret = gst_pad_push_event (demux->sinkpad, event);
break;
}
gst_object_unref (demux);
return ret;
}
gboolean
gst_flv_demux_query (GstPad * pad, GstQuery * query)
{
gboolean res = TRUE;
GstFLVDemux *demux;
demux = GST_FLV_DEMUX (gst_pad_get_parent (pad));
switch (GST_QUERY_TYPE (query)) {
case GST_QUERY_DURATION:
{
GstFormat format;
gst_query_parse_duration (query, &format, NULL);
/* duration is time only */
if (format != GST_FORMAT_TIME) {
GST_DEBUG_OBJECT (demux, "duration query only supported for time "
"format");
res = FALSE;
goto beach;
}
GST_DEBUG_OBJECT (pad, "duration query, replying %" GST_TIME_FORMAT,
GST_TIME_ARGS (demux->duration));
gst_query_set_duration (query, GST_FORMAT_TIME, demux->duration);
break;
}
case GST_QUERY_POSITION:
{
GstFormat format;
gst_query_parse_position (query, &format, NULL);
/* position is time only */
if (format != GST_FORMAT_TIME) {
GST_DEBUG_OBJECT (demux, "position query only supported for time "
"format");
res = FALSE;
goto beach;
}
GST_DEBUG_OBJECT (pad, "position query, replying %" GST_TIME_FORMAT,
GST_TIME_ARGS (demux->segment.last_stop));
gst_query_set_duration (query, GST_FORMAT_TIME, demux->segment.last_stop);
break;
}
case GST_QUERY_SEEKING:{
GstFormat fmt;
gst_query_parse_seeking (query, &fmt, NULL, NULL, NULL);
res = TRUE;
if (fmt != GST_FORMAT_TIME || !demux->index) {
gst_query_set_seeking (query, fmt, FALSE, -1, -1);
} else if (demux->random_access) {
gst_query_set_seeking (query, GST_FORMAT_TIME, TRUE, 0,
demux->duration);
} else {
GstQuery *peerquery = gst_query_new_seeking (GST_FORMAT_BYTES);
gboolean seekable = gst_pad_peer_query (demux->sinkpad, peerquery);
if (seekable)
gst_query_parse_seeking (peerquery, NULL, &seekable, NULL, NULL);
gst_query_unref (peerquery);
if (seekable)
gst_query_set_seeking (query, GST_FORMAT_TIME, seekable, 0,
demux->duration);
else
gst_query_set_seeking (query, GST_FORMAT_TIME, FALSE, -1, -1);
}
break;
}
case GST_QUERY_LATENCY:
default:
{
GstPad *peer;
if ((peer = gst_pad_get_peer (demux->sinkpad))) {
/* query latency on peer pad */
res = gst_pad_query (peer, query);
gst_object_unref (peer);
} else {
/* no peer, we don't know */
res = FALSE;
}
break;
}
}
beach:
gst_object_unref (demux);
return res;
}
static GstStateChangeReturn
gst_flv_demux_change_state (GstElement * element, GstStateChange transition)
{
GstFLVDemux *demux;
GstStateChangeReturn ret;
demux = GST_FLV_DEMUX (element);
switch (transition) {
case GST_STATE_CHANGE_READY_TO_PAUSED:
/* If this is our own index destroy it as the
* old entries might be wrong for the new stream */
if (demux->own_index) {
gst_object_unref (demux->index);
demux->index = NULL;
demux->own_index = FALSE;
}
/* If no index was created, generate one */
if (G_UNLIKELY (!demux->index)) {
GST_DEBUG_OBJECT (demux, "no index provided creating our own");
demux->index = gst_index_factory_make ("memindex");
gst_index_get_writer_id (demux->index, GST_OBJECT (demux),
&demux->index_id);
demux->own_index = TRUE;
}
gst_flv_demux_cleanup (demux);
break;
default:
break;
}
ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
if (ret == GST_STATE_CHANGE_FAILURE)
return ret;
switch (transition) {
case GST_STATE_CHANGE_PAUSED_TO_READY:
gst_flv_demux_cleanup (demux);
break;
default:
break;
}
return ret;
}
static void
gst_flv_demux_set_index (GstElement * element, GstIndex * index)
{
GstFLVDemux *demux = GST_FLV_DEMUX (element);
GST_OBJECT_LOCK (demux);
if (demux->index)
gst_object_unref (demux->index);
if (index) {
demux->index = gst_object_ref (index);
gst_index_get_writer_id (index, GST_OBJECT (element), &demux->index_id);
demux->own_index = FALSE;
} else
demux->index = NULL;
GST_OBJECT_UNLOCK (demux);
}
static GstIndex *
gst_flv_demux_get_index (GstElement * element)
{
GstIndex *result = NULL;
GstFLVDemux *demux = GST_FLV_DEMUX (element);
GST_OBJECT_LOCK (demux);
if (demux->index)
result = gst_object_ref (demux->index);
GST_OBJECT_UNLOCK (demux);
return result;
}
static void
gst_flv_demux_dispose (GObject * object)
{
GstFLVDemux *demux = GST_FLV_DEMUX (object);
GST_DEBUG_OBJECT (demux, "disposing FLV demuxer");
if (demux->adapter) {
gst_adapter_clear (demux->adapter);
g_object_unref (demux->adapter);
demux->adapter = NULL;
}
if (demux->taglist) {
gst_tag_list_free (demux->taglist);
demux->taglist = NULL;
}
if (demux->new_seg_event) {
gst_event_unref (demux->new_seg_event);
demux->new_seg_event = NULL;
}
if (demux->close_seg_event) {
gst_event_unref (demux->close_seg_event);
demux->close_seg_event = NULL;
}
if (demux->audio_codec_data) {
gst_buffer_unref (demux->audio_codec_data);
demux->audio_codec_data = NULL;
}
if (demux->video_codec_data) {
gst_buffer_unref (demux->video_codec_data);
demux->video_codec_data = NULL;
}
if (demux->audio_pad) {
gst_object_unref (demux->audio_pad);
demux->audio_pad = NULL;
}
if (demux->video_pad) {
gst_object_unref (demux->video_pad);
demux->video_pad = NULL;
}
if (demux->index) {
gst_object_unref (demux->index);
demux->index = NULL;
}
if (demux->times) {
g_array_free (demux->times, TRUE);
demux->times = NULL;
}
if (demux->filepositions) {
g_array_free (demux->filepositions, TRUE);
demux->filepositions = NULL;
}
GST_CALL_PARENT (G_OBJECT_CLASS, dispose, (object));
}
static void
gst_flv_demux_base_init (gpointer g_class)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&flv_sink_template));
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&audio_src_template));
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&video_src_template));
gst_element_class_set_details_simple (element_class, "FLV Demuxer",
"Codec/Demuxer",
"Demux FLV feeds into digital streams",
"Julien Moutte <julien@moutte.net>");
}
static void
gst_flv_demux_class_init (GstFLVDemuxClass * klass)
{
GstElementClass *gstelement_class = GST_ELEMENT_CLASS (klass);
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
gobject_class->dispose = GST_DEBUG_FUNCPTR (gst_flv_demux_dispose);
gstelement_class->change_state =
GST_DEBUG_FUNCPTR (gst_flv_demux_change_state);
gstelement_class->set_index = GST_DEBUG_FUNCPTR (gst_flv_demux_set_index);
gstelement_class->get_index = GST_DEBUG_FUNCPTR (gst_flv_demux_get_index);
}
static void
gst_flv_demux_init (GstFLVDemux * demux, GstFLVDemuxClass * g_class)
{
demux->sinkpad =
gst_pad_new_from_static_template (&flv_sink_template, "sink");
gst_pad_set_event_function (demux->sinkpad,
GST_DEBUG_FUNCPTR (gst_flv_demux_sink_event));
gst_pad_set_chain_function (demux->sinkpad,
GST_DEBUG_FUNCPTR (gst_flv_demux_chain));
gst_pad_set_activate_function (demux->sinkpad,
GST_DEBUG_FUNCPTR (gst_flv_demux_sink_activate));
gst_pad_set_activatepull_function (demux->sinkpad,
GST_DEBUG_FUNCPTR (gst_flv_demux_sink_activate_pull));
gst_pad_set_activatepush_function (demux->sinkpad,
GST_DEBUG_FUNCPTR (gst_flv_demux_sink_activate_push));
gst_element_add_pad (GST_ELEMENT (demux), demux->sinkpad);
demux->adapter = gst_adapter_new ();
demux->taglist = gst_tag_list_new ();
gst_segment_init (&demux->segment, GST_FORMAT_TIME);
demux->own_index = FALSE;
gst_flv_demux_cleanup (demux);
}
static gboolean
plugin_init (GstPlugin * plugin)
{
GST_DEBUG_CATEGORY_INIT (flvdemux_debug, "flvdemux", 0, "FLV demuxer");
if (!gst_element_register (plugin, "flvdemux", GST_RANK_PRIMARY,
gst_flv_demux_get_type ()) ||
!gst_element_register (plugin, "flvmux", GST_RANK_PRIMARY,
gst_flv_mux_get_type ()))
return FALSE;
return TRUE;
}
GST_PLUGIN_DEFINE (GST_VERSION_MAJOR, GST_VERSION_MINOR,
"flv", "FLV muxing and demuxing plugin",
plugin_init, VERSION, "LGPL", GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN)
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