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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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fae6fbaa6b
Fix first audio buffers being out of segment because the audio stream is starting earlier than the video one which was the first demuxed. Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/5940>
3976 lines
116 KiB
C
3976 lines
116 KiB
C
/* GStreamer
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* Copyright (C) <2007> Julien Moutte <julien@moutte.net>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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/**
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* SECTION:element-flvdemux
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* @title: flvdemux
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*
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* flvdemux demuxes an FLV file into the different contained streams.
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*
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* ## Example launch line
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* |[
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* gst-launch-1.0 -v filesrc location=/path/to/flv ! flvdemux ! audioconvert ! autoaudiosink
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* ]| This pipeline demuxes an FLV file and outputs the contained raw audio streams.
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*
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "gstflvelements.h"
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#include "gstflvdemux.h"
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#include "gstflvmux.h"
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#include <string.h>
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#include <stdio.h>
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#include <gst/base/gstbytereader.h>
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#include <gst/base/gstbytewriter.h>
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#include <gst/pbutils/descriptions.h>
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#include <gst/pbutils/pbutils.h>
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#include <gst/audio/audio.h>
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#include <gst/video/video.h>
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#include <gst/tag/tag.h>
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GST_DEBUG_CATEGORY_EXTERN (flvdemux_debug);
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#define GST_CAT_DEFAULT flvdemux_debug
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/* FIXME: don't rely on own GstIndex */
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#include "gstindex.c"
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#include "gstmemindex.c"
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#define GST_ASSOCIATION_FLAG_NONE GST_INDEX_ASSOCIATION_FLAG_NONE
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#define GST_ASSOCIATION_FLAG_KEY_UNIT GST_INDEX_ASSOCIATION_FLAG_KEY_UNIT
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#define GST_ASSOCIATION_FLAG_DELTA_UNIT GST_INDEX_ASSOCIATION_FLAG_DELTA_UNIT
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static GstStaticPadTemplate flv_sink_template = GST_STATIC_PAD_TEMPLATE ("sink",
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GST_PAD_SINK,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS ("video/x-flv")
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);
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static GstStaticPadTemplate audio_src_template =
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GST_STATIC_PAD_TEMPLATE ("audio",
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GST_PAD_SRC,
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GST_PAD_SOMETIMES,
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GST_STATIC_CAPS
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("audio/x-adpcm, layout = (string) swf, channels = (int) { 1, 2 }, rate = (int) { 5512, 11025, 22050, 44100 }; "
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"audio/mpeg, mpegversion = (int) 1, layer = (int) 3, channels = (int) { 1, 2 }, rate = (int) { 5512, 8000, 11025, 22050, 44100 }, parsed = (boolean) TRUE; "
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"audio/mpeg, mpegversion = (int) 4, stream-format = (string) raw, framed = (boolean) TRUE; "
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"audio/x-nellymoser, channels = (int) { 1, 2 }, rate = (int) { 5512, 8000, 11025, 16000, 22050, 44100 }; "
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"audio/x-raw, format = (string) { U8, S16LE }, layout = (string) interleaved, channels = (int) { 1, 2 }, rate = (int) { 5512, 11025, 22050, 44100 }; "
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"audio/x-alaw, channels = (int) { 1, 2 }, rate = (int) 8000; "
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"audio/x-mulaw, channels = (int) { 1, 2 }, rate = (int) 8000; "
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"audio/x-speex, channels = (int) 1, rate = (int) 16000;")
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);
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static GstStaticPadTemplate video_src_template =
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GST_STATIC_PAD_TEMPLATE ("video",
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GST_PAD_SRC,
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GST_PAD_SOMETIMES,
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GST_STATIC_CAPS ("video/x-flash-video, flvversion=(int) 1; "
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"video/x-flash-screen; "
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"video/x-vp6-flash; " "video/x-vp6-alpha; "
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"video/x-h264, stream-format=avc;")
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);
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#define gst_flv_demux_parent_class parent_class
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G_DEFINE_TYPE (GstFlvDemux, gst_flv_demux, GST_TYPE_ELEMENT);
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GST_ELEMENT_REGISTER_DEFINE_WITH_CODE (flvdemux, "flvdemux",
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GST_RANK_PRIMARY, GST_TYPE_FLV_DEMUX, flv_element_init (plugin));
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/* 9 bytes of header + 4 bytes of first previous tag size */
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#define FLV_HEADER_SIZE 13
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/* 1 byte of tag type + 3 bytes of tag data size */
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#define FLV_TAG_TYPE_SIZE 4
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/* two seconds - consider dts are resynced to another base if this different */
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#define RESYNC_THRESHOLD 2000
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/* how much stream time to wait for audio tags to appear after we have video, or vice versa */
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#define NO_MORE_PADS_THRESHOLD (6 * GST_SECOND)
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static gboolean flv_demux_handle_seek_push (GstFlvDemux * demux,
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GstEvent * event);
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static gboolean gst_flv_demux_handle_seek_pull (GstFlvDemux * demux,
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GstEvent * event, gboolean seeking);
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static gboolean gst_flv_demux_sink_query (GstPad * pad, GstObject * parent,
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GstQuery * query);
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static gboolean gst_flv_demux_query (GstPad * pad, GstObject * parent,
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GstQuery * query);
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static gboolean gst_flv_demux_src_event (GstPad * pad, GstObject * parent,
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GstEvent * event);
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static GstIndex *gst_flv_demux_get_index (GstElement * element);
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static void gst_flv_demux_push_tags (GstFlvDemux * demux);
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static void
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gst_flv_demux_parse_and_add_index_entry (GstFlvDemux * demux, GstClockTime ts,
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guint64 pos, gboolean keyframe)
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{
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GstIndexAssociation associations[2];
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GstIndex *index;
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GstIndexEntry *entry;
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GST_LOG_OBJECT (demux,
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"adding key=%d association %" GST_TIME_FORMAT "-> %" G_GUINT64_FORMAT,
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keyframe, GST_TIME_ARGS (ts), pos);
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/* if upstream is not seekable there is no point in building an index */
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if (!demux->upstream_seekable)
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return;
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index = gst_flv_demux_get_index (GST_ELEMENT (demux));
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if (!index)
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return;
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/* entry may already have been added before, avoid adding indefinitely */
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entry = gst_index_get_assoc_entry (index, demux->index_id,
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GST_INDEX_LOOKUP_EXACT, GST_ASSOCIATION_FLAG_NONE, GST_FORMAT_BYTES, pos);
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if (entry) {
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#ifndef GST_DISABLE_GST_DEBUG
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gint64 time = 0;
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gboolean key;
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gst_index_entry_assoc_map (entry, GST_FORMAT_TIME, &time);
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key = !!(GST_INDEX_ASSOC_FLAGS (entry) & GST_ASSOCIATION_FLAG_KEY_UNIT);
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GST_LOG_OBJECT (demux, "position already mapped to time %" GST_TIME_FORMAT
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", keyframe %d", GST_TIME_ARGS (time), key);
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/* there is not really a way to delete the existing one */
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if (time != ts || key != !!keyframe)
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GST_DEBUG_OBJECT (demux, "metadata mismatch");
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#endif
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gst_object_unref (index);
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return;
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}
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associations[0].format = GST_FORMAT_TIME;
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associations[0].value = ts;
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associations[1].format = GST_FORMAT_BYTES;
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associations[1].value = pos;
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gst_index_add_associationv (index, demux->index_id,
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(keyframe) ? GST_ASSOCIATION_FLAG_KEY_UNIT :
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GST_ASSOCIATION_FLAG_DELTA_UNIT, 2,
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(const GstIndexAssociation *) &associations);
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if (pos > demux->index_max_pos)
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demux->index_max_pos = pos;
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if (ts > demux->index_max_time)
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demux->index_max_time = ts;
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gst_object_unref (index);
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}
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static gchar *
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FLV_GET_STRING (GstByteReader * reader)
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{
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guint16 string_size = 0;
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gchar *string = NULL;
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const guint8 *str = NULL;
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g_return_val_if_fail (reader != NULL, NULL);
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if (G_UNLIKELY (!gst_byte_reader_get_uint16_be (reader, &string_size)))
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return NULL;
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if (G_UNLIKELY (string_size > gst_byte_reader_get_remaining (reader)))
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return NULL;
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string = g_try_malloc0 (string_size + 1);
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if (G_UNLIKELY (!string)) {
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return NULL;
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}
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if (G_UNLIKELY (!gst_byte_reader_get_data (reader, string_size, &str))) {
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g_free (string);
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return NULL;
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}
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memcpy (string, str, string_size);
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/* Check utf-8 validity if it's not an empty string */
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if (string[0] && !g_utf8_validate (string, string_size, NULL)) {
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g_free (string);
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return NULL;
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}
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return string;
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}
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static void
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gst_flv_demux_check_seekability (GstFlvDemux * demux)
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{
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GstQuery *query;
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gint64 start = -1, stop = -1;
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demux->upstream_seekable = FALSE;
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query = gst_query_new_seeking (GST_FORMAT_BYTES);
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if (!gst_pad_peer_query (demux->sinkpad, query)) {
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GST_DEBUG_OBJECT (demux, "seeking query failed");
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gst_query_unref (query);
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return;
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}
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gst_query_parse_seeking (query, NULL, &demux->upstream_seekable,
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&start, &stop);
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gst_query_unref (query);
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/* try harder to query upstream size if we didn't get it the first time */
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if (demux->upstream_seekable && stop == -1) {
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GST_DEBUG_OBJECT (demux, "doing duration query to fix up unset stop");
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gst_pad_peer_query_duration (demux->sinkpad, GST_FORMAT_BYTES, &stop);
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}
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/* if upstream doesn't know the size, it's likely that it's not seekable in
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* practice even if it technically may be seekable */
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if (demux->upstream_seekable && (start != 0 || stop <= start)) {
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GST_DEBUG_OBJECT (demux, "seekable but unknown start/stop -> disable");
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demux->upstream_seekable = FALSE;
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}
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GST_DEBUG_OBJECT (demux, "upstream seekable: %d", demux->upstream_seekable);
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}
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static GstDateTime *
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parse_flv_demux_parse_date_string (const gchar * s)
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{
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static const gchar months[12][4] = {
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"Jan", "Feb", "Mar", "Apr",
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"May", "Jun", "Jul", "Aug",
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"Sep", "Oct", "Nov", "Dec"
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};
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GstDateTime *dt = NULL;
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gchar **tokens;
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guint64 d;
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gchar *endptr, *stripped;
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gint i, hh, mm, ss;
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gint year = -1, month = -1, day = -1;
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gint hour = -1, minute = -1, seconds = -1;
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stripped = g_strstrip (g_strdup (s));
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/* "Fri Oct 15 15:13:16 2004" needs to be parsed */
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tokens = g_strsplit (stripped, " ", -1);
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g_free (stripped);
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if (g_strv_length (tokens) != 5)
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goto out;
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/* year */
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d = g_ascii_strtoull (tokens[4], &endptr, 10);
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if (d == 0 && *endptr != '\0')
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goto out;
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year = d;
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/* month */
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if (strlen (tokens[1]) != 3)
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goto out;
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for (i = 0; i < 12; i++) {
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if (!strcmp (tokens[1], months[i])) {
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break;
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}
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}
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if (i == 12)
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goto out;
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month = i + 1;
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/* day */
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d = g_ascii_strtoull (tokens[2], &endptr, 10);
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if (d == 0 && *endptr != '\0')
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goto out;
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day = d;
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/* time */
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hh = mm = ss = 0;
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if (sscanf (tokens[3], "%d:%d:%d", &hh, &mm, &ss) < 2)
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goto out;
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if (hh >= 0 && hh < 24 && mm >= 0 && mm < 60 && ss >= 0 && ss < 60) {
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hour = hh;
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minute = mm;
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seconds = ss;
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}
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out:
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if (tokens)
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g_strfreev (tokens);
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if (year > 0)
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dt = gst_date_time_new (0.0, year, month, day, hour, minute, seconds);
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return dt;
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}
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static gboolean
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gst_flv_demux_parse_metadata_item (GstFlvDemux * demux, GstByteReader * reader,
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gboolean * end_marker)
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{
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gchar *tag_name = NULL;
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guint8 tag_type = 0;
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/* Initialize the end_marker flag to FALSE */
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*end_marker = FALSE;
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/* Name of the tag */
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tag_name = FLV_GET_STRING (reader);
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if (G_UNLIKELY (!tag_name)) {
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GST_WARNING_OBJECT (demux, "failed reading tag name");
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return FALSE;
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}
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/* What kind of object is that */
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if (!gst_byte_reader_get_uint8 (reader, &tag_type))
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goto error;
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GST_DEBUG_OBJECT (demux, "tag name %s, tag type %d", tag_name, tag_type);
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switch (tag_type) {
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case 0: /* Double */
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{ /* Use a union to read the uint64 and then as a double */
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gdouble d = 0;
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if (!gst_byte_reader_get_float64_be (reader, &d))
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goto error;
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GST_DEBUG_OBJECT (demux, "%s => (double) %f", tag_name, d);
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if (!strcmp (tag_name, "duration")) {
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demux->duration = d * GST_SECOND;
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gst_tag_list_add (demux->taglist, GST_TAG_MERGE_REPLACE,
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GST_TAG_DURATION, demux->duration, NULL);
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} else if (!strcmp (tag_name, "AspectRatioX")) {
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demux->par_x = d;
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demux->got_par = TRUE;
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} else if (!strcmp (tag_name, "AspectRatioY")) {
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demux->par_y = d;
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demux->got_par = TRUE;
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} else if (!strcmp (tag_name, "width")) {
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demux->w = d;
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} else if (!strcmp (tag_name, "height")) {
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demux->h = d;
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} else if (!strcmp (tag_name, "framerate")) {
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demux->framerate = d;
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} else if (!strcmp (tag_name, "audiodatarate")) {
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demux->audio_bitrate = (guint) (d * 1024);
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gst_tag_list_add (demux->audio_tags, GST_TAG_MERGE_REPLACE,
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GST_TAG_NOMINAL_BITRATE, demux->audio_bitrate, NULL);
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} else if (!strcmp (tag_name, "videodatarate")) {
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demux->video_bitrate = (guint) (d * 1024);
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gst_tag_list_add (demux->video_tags, GST_TAG_MERGE_REPLACE,
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GST_TAG_NOMINAL_BITRATE, demux->video_bitrate, NULL);
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} else {
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GST_INFO_OBJECT (demux, "Tag \'%s\' not handled", tag_name);
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}
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|
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break;
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}
|
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case 1: /* Boolean */
|
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{
|
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guint8 b = 0;
|
|
|
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if (!gst_byte_reader_get_uint8 (reader, &b))
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goto error;
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GST_DEBUG_OBJECT (demux, "%s => (boolean) %d", tag_name, b);
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|
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GST_INFO_OBJECT (demux, "Tag \'%s\' not handled", tag_name);
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break;
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}
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case 2: /* String */
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{
|
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gchar *s = NULL;
|
|
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s = FLV_GET_STRING (reader);
|
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if (s == NULL)
|
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goto error;
|
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if (!strcmp (s, "")) {
|
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/* Not strictly an error, just an empty string */
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g_free (s);
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break;
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}
|
|
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GST_DEBUG_OBJECT (demux, "%s => (string) %s", tag_name, s);
|
|
|
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if (!strcmp (tag_name, "creationdate")) {
|
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GstDateTime *dt;
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|
|
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dt = parse_flv_demux_parse_date_string (s);
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if (dt == NULL) {
|
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GST_DEBUG_OBJECT (demux, "Failed to parse '%s' into datetime", s);
|
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} else {
|
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gst_tag_list_add (demux->taglist, GST_TAG_MERGE_REPLACE,
|
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GST_TAG_DATE_TIME, dt, NULL);
|
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gst_date_time_unref (dt);
|
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}
|
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} else if (!strcmp (tag_name, "creator")) {
|
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gst_tag_list_add (demux->taglist, GST_TAG_MERGE_REPLACE,
|
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GST_TAG_ARTIST, s, NULL);
|
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} else if (!strcmp (tag_name, "title")) {
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gst_tag_list_add (demux->taglist, GST_TAG_MERGE_REPLACE,
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GST_TAG_TITLE, s, NULL);
|
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} else if (!strcmp (tag_name, "metadatacreator")
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|| !strcmp (tag_name, "encoder")) {
|
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gst_tag_list_add (demux->taglist, GST_TAG_MERGE_REPLACE,
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GST_TAG_ENCODER, s, NULL);
|
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} else {
|
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GST_INFO_OBJECT (demux, "Tag \'%s\' not handled", tag_name);
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}
|
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|
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g_free (s);
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|
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break;
|
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}
|
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case 3: /* Object */
|
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{
|
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gboolean end_of_object_marker = FALSE;
|
|
|
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while (!end_of_object_marker) {
|
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gboolean ok = gst_flv_demux_parse_metadata_item (demux, reader,
|
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&end_of_object_marker);
|
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|
|
if (G_UNLIKELY (!ok)) {
|
|
GST_WARNING_OBJECT (demux, "failed reading a tag, skipping");
|
|
goto error;
|
|
}
|
|
}
|
|
|
|
break;
|
|
}
|
|
case 8: /* ECMA array */
|
|
{
|
|
guint32 nb_elems = 0;
|
|
gboolean end_of_object_marker = FALSE;
|
|
|
|
if (!gst_byte_reader_get_uint32_be (reader, &nb_elems))
|
|
goto error;
|
|
|
|
GST_DEBUG_OBJECT (demux, "there are approx. %d elements in the array",
|
|
nb_elems);
|
|
|
|
while (!end_of_object_marker) {
|
|
gboolean ok = gst_flv_demux_parse_metadata_item (demux, reader,
|
|
&end_of_object_marker);
|
|
|
|
if (G_UNLIKELY (!ok)) {
|
|
GST_WARNING_OBJECT (demux, "failed reading a tag, skipping");
|
|
goto error;
|
|
}
|
|
}
|
|
|
|
break;
|
|
}
|
|
case 9: /* End marker */
|
|
{
|
|
GST_DEBUG_OBJECT (demux, "end marker ?");
|
|
if (tag_name[0] == '\0') {
|
|
|
|
GST_DEBUG_OBJECT (demux, "end marker detected");
|
|
|
|
*end_marker = TRUE;
|
|
}
|
|
|
|
break;
|
|
}
|
|
case 10: /* Array */
|
|
{
|
|
guint32 nb_elems = 0;
|
|
|
|
if (!gst_byte_reader_get_uint32_be (reader, &nb_elems))
|
|
goto error;
|
|
|
|
GST_DEBUG_OBJECT (demux, "array has %d elements", nb_elems);
|
|
|
|
if (!strcmp (tag_name, "times")) {
|
|
if (demux->times) {
|
|
g_array_free (demux->times, TRUE);
|
|
}
|
|
demux->times = g_array_new (FALSE, TRUE, sizeof (gdouble));
|
|
} else if (!strcmp (tag_name, "filepositions")) {
|
|
if (demux->filepositions) {
|
|
g_array_free (demux->filepositions, TRUE);
|
|
}
|
|
demux->filepositions = g_array_new (FALSE, TRUE, sizeof (gdouble));
|
|
}
|
|
|
|
while (nb_elems--) {
|
|
guint8 elem_type = 0;
|
|
|
|
if (!gst_byte_reader_get_uint8 (reader, &elem_type))
|
|
goto error;
|
|
|
|
switch (elem_type) {
|
|
case 0:
|
|
{
|
|
gdouble d;
|
|
|
|
if (!gst_byte_reader_get_float64_be (reader, &d))
|
|
goto error;
|
|
|
|
GST_DEBUG_OBJECT (demux, "element is a double %f", d);
|
|
|
|
if (!strcmp (tag_name, "times") && demux->times) {
|
|
g_array_append_val (demux->times, d);
|
|
} else if (!strcmp (tag_name, "filepositions") &&
|
|
demux->filepositions) {
|
|
g_array_append_val (demux->filepositions, d);
|
|
}
|
|
break;
|
|
}
|
|
default:
|
|
GST_WARNING_OBJECT (demux, "unsupported array element type %d",
|
|
elem_type);
|
|
}
|
|
}
|
|
|
|
break;
|
|
}
|
|
case 11: /* Date */
|
|
{
|
|
gdouble d = 0;
|
|
gint16 i = 0;
|
|
|
|
if (!gst_byte_reader_get_float64_be (reader, &d))
|
|
goto error;
|
|
|
|
if (!gst_byte_reader_get_int16_be (reader, &i))
|
|
goto error;
|
|
|
|
GST_DEBUG_OBJECT (demux,
|
|
"%s => (date as a double) %f, timezone offset %d", tag_name, d, i);
|
|
|
|
GST_INFO_OBJECT (demux, "Tag \'%s\' not handled", tag_name);
|
|
|
|
break;
|
|
}
|
|
default:
|
|
GST_WARNING_OBJECT (demux, "unsupported tag type %d", tag_type);
|
|
}
|
|
|
|
g_free (tag_name);
|
|
|
|
return TRUE;
|
|
|
|
error:
|
|
g_free (tag_name);
|
|
|
|
return FALSE;
|
|
}
|
|
|
|
static void
|
|
gst_flv_demux_clear_tags (GstFlvDemux * demux)
|
|
{
|
|
GST_DEBUG_OBJECT (demux, "clearing taglist");
|
|
|
|
if (demux->taglist) {
|
|
gst_tag_list_unref (demux->taglist);
|
|
}
|
|
demux->taglist = gst_tag_list_new_empty ();
|
|
gst_tag_list_set_scope (demux->taglist, GST_TAG_SCOPE_GLOBAL);
|
|
|
|
if (demux->audio_tags) {
|
|
gst_tag_list_unref (demux->audio_tags);
|
|
}
|
|
demux->audio_tags = gst_tag_list_new_empty ();
|
|
|
|
if (demux->video_tags) {
|
|
gst_tag_list_unref (demux->video_tags);
|
|
}
|
|
demux->video_tags = gst_tag_list_new_empty ();
|
|
}
|
|
|
|
static GstFlowReturn
|
|
gst_flv_demux_parse_tag_script (GstFlvDemux * demux, GstBuffer * buffer)
|
|
{
|
|
GstFlowReturn ret = GST_FLOW_OK;
|
|
GstByteReader reader;
|
|
guint8 type = 0;
|
|
GstMapInfo map;
|
|
|
|
g_return_val_if_fail (gst_buffer_get_size (buffer) >= 7, GST_FLOW_ERROR);
|
|
|
|
gst_buffer_map (buffer, &map, GST_MAP_READ);
|
|
gst_byte_reader_init (&reader, map.data, map.size);
|
|
|
|
gst_byte_reader_skip_unchecked (&reader, 7);
|
|
|
|
GST_LOG_OBJECT (demux, "parsing a script tag");
|
|
|
|
if (!gst_byte_reader_get_uint8 (&reader, &type))
|
|
goto cleanup;
|
|
|
|
/* Must be string */
|
|
if (type == 2) {
|
|
gchar *function_name;
|
|
guint i;
|
|
|
|
function_name = FLV_GET_STRING (&reader);
|
|
|
|
GST_LOG_OBJECT (demux, "function name is %s", GST_STR_NULL (function_name));
|
|
|
|
if (function_name != NULL && strcmp (function_name, "onMetaData") == 0) {
|
|
gboolean end_marker = FALSE;
|
|
GST_DEBUG_OBJECT (demux, "we have a metadata script object");
|
|
|
|
gst_flv_demux_clear_tags (demux);
|
|
|
|
if (!gst_byte_reader_get_uint8 (&reader, &type)) {
|
|
g_free (function_name);
|
|
goto cleanup;
|
|
}
|
|
|
|
switch (type) {
|
|
case 8:
|
|
{
|
|
guint32 nb_elems = 0;
|
|
|
|
/* ECMA array */
|
|
if (!gst_byte_reader_get_uint32_be (&reader, &nb_elems)) {
|
|
g_free (function_name);
|
|
goto cleanup;
|
|
}
|
|
|
|
/* The number of elements is just a hint, some files have
|
|
nb_elements == 0 and actually contain items. */
|
|
GST_DEBUG_OBJECT (demux, "there are approx. %d elements in the array",
|
|
nb_elems);
|
|
}
|
|
/* fallthrough to read data */
|
|
case 3:
|
|
{
|
|
/* Object */
|
|
while (!end_marker) {
|
|
gboolean ok =
|
|
gst_flv_demux_parse_metadata_item (demux, &reader, &end_marker);
|
|
|
|
if (G_UNLIKELY (!ok)) {
|
|
GST_WARNING_OBJECT (demux, "failed reading a tag, skipping");
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
break;
|
|
default:
|
|
GST_DEBUG_OBJECT (demux, "Unhandled script data type : %d", type);
|
|
g_free (function_name);
|
|
goto cleanup;
|
|
}
|
|
|
|
gst_flv_demux_push_tags (demux);
|
|
}
|
|
|
|
g_free (function_name);
|
|
|
|
if (demux->times && demux->filepositions) {
|
|
guint num;
|
|
|
|
/* If an index was found, insert associations */
|
|
num = MIN (demux->times->len, demux->filepositions->len);
|
|
for (i = 0; i < num; i++) {
|
|
guint64 time, fileposition;
|
|
|
|
time = g_array_index (demux->times, gdouble, i) * GST_SECOND;
|
|
fileposition = g_array_index (demux->filepositions, gdouble, i);
|
|
gst_flv_demux_parse_and_add_index_entry (demux, time, fileposition,
|
|
TRUE);
|
|
}
|
|
demux->indexed = TRUE;
|
|
}
|
|
}
|
|
|
|
cleanup:
|
|
gst_buffer_unmap (buffer, &map);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static gboolean
|
|
have_group_id (GstFlvDemux * demux)
|
|
{
|
|
GstEvent *event;
|
|
|
|
event = gst_pad_get_sticky_event (demux->sinkpad, GST_EVENT_STREAM_START, 0);
|
|
if (event) {
|
|
if (gst_event_parse_group_id (event, &demux->group_id))
|
|
demux->have_group_id = TRUE;
|
|
else
|
|
demux->have_group_id = FALSE;
|
|
gst_event_unref (event);
|
|
} else if (!demux->have_group_id) {
|
|
demux->have_group_id = TRUE;
|
|
demux->group_id = gst_util_group_id_next ();
|
|
}
|
|
|
|
return demux->have_group_id;
|
|
}
|
|
|
|
static gboolean
|
|
gst_flv_demux_audio_negotiate (GstFlvDemux * demux, guint32 codec_tag,
|
|
guint32 rate, guint32 channels, guint32 width)
|
|
{
|
|
GstCaps *caps = NULL, *old_caps;
|
|
gboolean ret = FALSE;
|
|
guint adjusted_rate = rate;
|
|
guint adjusted_channels = channels;
|
|
GstEvent *event;
|
|
gchar *stream_id;
|
|
|
|
switch (codec_tag) {
|
|
case 1:
|
|
caps = gst_caps_new_simple ("audio/x-adpcm", "layout", G_TYPE_STRING,
|
|
"swf", NULL);
|
|
break;
|
|
case 2:
|
|
case 14:
|
|
caps = gst_caps_new_simple ("audio/mpeg",
|
|
"mpegversion", G_TYPE_INT, 1, "layer", G_TYPE_INT, 3,
|
|
"parsed", G_TYPE_BOOLEAN, TRUE, NULL);
|
|
break;
|
|
case 0:
|
|
case 3:
|
|
{
|
|
GstAudioFormat format;
|
|
|
|
/* Assuming little endian for 0 (aka endianness of the
|
|
* system on which the file was created) as most people
|
|
* are probably using little endian machines */
|
|
format = gst_audio_format_build_integer ((width == 8) ? FALSE : TRUE,
|
|
G_LITTLE_ENDIAN, width, width);
|
|
|
|
caps = gst_caps_new_simple ("audio/x-raw",
|
|
"format", G_TYPE_STRING, gst_audio_format_to_string (format),
|
|
"layout", G_TYPE_STRING, "interleaved", NULL);
|
|
break;
|
|
}
|
|
case 4:
|
|
case 5:
|
|
case 6:
|
|
caps = gst_caps_new_empty_simple ("audio/x-nellymoser");
|
|
break;
|
|
case 10:
|
|
{
|
|
GstMapInfo map;
|
|
if (!demux->audio_codec_data) {
|
|
GST_DEBUG_OBJECT (demux, "don't have AAC codec data yet");
|
|
ret = TRUE;
|
|
goto done;
|
|
}
|
|
|
|
gst_buffer_map (demux->audio_codec_data, &map, GST_MAP_READ);
|
|
|
|
/* use codec-data to extract and verify samplerate */
|
|
if (map.size >= 2) {
|
|
gint freq_index;
|
|
|
|
freq_index = GST_READ_UINT16_BE (map.data);
|
|
freq_index = (freq_index & 0x0780) >> 7;
|
|
adjusted_rate =
|
|
gst_codec_utils_aac_get_sample_rate_from_index (freq_index);
|
|
|
|
if (adjusted_rate && (rate != adjusted_rate)) {
|
|
GST_LOG_OBJECT (demux, "Ajusting AAC sample rate %d -> %d", rate,
|
|
adjusted_rate);
|
|
} else {
|
|
adjusted_rate = rate;
|
|
}
|
|
|
|
adjusted_channels =
|
|
gst_codec_utils_aac_get_channels (map.data, map.size);
|
|
|
|
if (adjusted_channels && (channels != adjusted_channels)) {
|
|
GST_LOG_OBJECT (demux, "Ajusting AAC channels %d -> %d", channels,
|
|
adjusted_channels);
|
|
} else {
|
|
adjusted_channels = channels;
|
|
}
|
|
}
|
|
gst_buffer_unmap (demux->audio_codec_data, &map);
|
|
|
|
caps = gst_caps_new_simple ("audio/mpeg",
|
|
"mpegversion", G_TYPE_INT, 4, "framed", G_TYPE_BOOLEAN, TRUE,
|
|
"stream-format", G_TYPE_STRING, "raw", NULL);
|
|
break;
|
|
}
|
|
case 7:
|
|
caps = gst_caps_new_empty_simple ("audio/x-alaw");
|
|
break;
|
|
case 8:
|
|
caps = gst_caps_new_empty_simple ("audio/x-mulaw");
|
|
break;
|
|
case 11:
|
|
{
|
|
GValue streamheader = G_VALUE_INIT;
|
|
GValue value = G_VALUE_INIT;
|
|
GstByteWriter w;
|
|
GstStructure *structure;
|
|
GstBuffer *buf;
|
|
GstTagList *tags;
|
|
|
|
caps = gst_caps_new_empty_simple ("audio/x-speex");
|
|
structure = gst_caps_get_structure (caps, 0);
|
|
|
|
GST_DEBUG_OBJECT (demux, "generating speex header");
|
|
|
|
/* Speex decoder expects streamheader to be { [header], [comment] } */
|
|
g_value_init (&streamheader, GST_TYPE_ARRAY);
|
|
|
|
/* header part */
|
|
gst_byte_writer_init_with_size (&w, 80, TRUE);
|
|
gst_byte_writer_put_data (&w, (guint8 *) "Speex ", 8);
|
|
gst_byte_writer_put_data (&w, (guint8 *) "1.1.12", 7);
|
|
gst_byte_writer_fill (&w, 0, 13);
|
|
gst_byte_writer_put_uint32_le (&w, 1); /* version */
|
|
gst_byte_writer_put_uint32_le (&w, 80); /* header_size */
|
|
gst_byte_writer_put_uint32_le (&w, 16000); /* rate */
|
|
gst_byte_writer_put_uint32_le (&w, 1); /* mode: Wideband */
|
|
gst_byte_writer_put_uint32_le (&w, 4); /* mode_bitstream_version */
|
|
gst_byte_writer_put_uint32_le (&w, 1); /* nb_channels: 1 */
|
|
gst_byte_writer_put_uint32_le (&w, -1); /* bitrate */
|
|
gst_byte_writer_put_uint32_le (&w, 0x50); /* frame_size */
|
|
gst_byte_writer_put_uint32_le (&w, 0); /* VBR */
|
|
gst_byte_writer_put_uint32_le (&w, 1); /* frames_per_packet */
|
|
gst_byte_writer_put_uint32_le (&w, 0); /* extra_headers */
|
|
gst_byte_writer_put_uint32_le (&w, 0); /* reserved1 */
|
|
gst_byte_writer_put_uint32_le (&w, 0); /* reserved2 */
|
|
g_assert (gst_byte_writer_get_size (&w) == 80);
|
|
|
|
g_value_init (&value, GST_TYPE_BUFFER);
|
|
g_value_take_boxed (&value, gst_byte_writer_reset_and_get_buffer (&w));
|
|
gst_value_array_append_value (&streamheader, &value);
|
|
g_value_unset (&value);
|
|
|
|
/* comment part */
|
|
g_value_init (&value, GST_TYPE_BUFFER);
|
|
tags = gst_tag_list_new_empty ();
|
|
buf = gst_tag_list_to_vorbiscomment_buffer (tags, NULL, 0, "No comments");
|
|
gst_tag_list_unref (tags);
|
|
g_value_take_boxed (&value, buf);
|
|
gst_value_array_append_value (&streamheader, &value);
|
|
g_value_unset (&value);
|
|
|
|
gst_structure_take_value (structure, "streamheader", &streamheader);
|
|
|
|
channels = 1;
|
|
adjusted_rate = 16000;
|
|
break;
|
|
}
|
|
default:
|
|
GST_WARNING_OBJECT (demux, "unsupported audio codec tag %u", codec_tag);
|
|
break;
|
|
}
|
|
|
|
if (G_UNLIKELY (!caps)) {
|
|
GST_WARNING_OBJECT (demux, "failed creating caps for audio pad");
|
|
goto beach;
|
|
}
|
|
|
|
gst_caps_set_simple (caps, "rate", G_TYPE_INT, adjusted_rate,
|
|
"channels", G_TYPE_INT, adjusted_channels, NULL);
|
|
|
|
if (demux->audio_codec_data) {
|
|
gst_caps_set_simple (caps, "codec_data", GST_TYPE_BUFFER,
|
|
demux->audio_codec_data, NULL);
|
|
}
|
|
|
|
old_caps = gst_pad_get_current_caps (demux->audio_pad);
|
|
if (!old_caps) {
|
|
stream_id =
|
|
gst_pad_create_stream_id (demux->audio_pad, GST_ELEMENT_CAST (demux),
|
|
"audio");
|
|
|
|
event = gst_event_new_stream_start (stream_id);
|
|
if (demux->segment_seqnum != GST_SEQNUM_INVALID)
|
|
gst_event_set_seqnum (event, demux->segment_seqnum);
|
|
if (have_group_id (demux))
|
|
gst_event_set_group_id (event, demux->group_id);
|
|
|
|
if (demux->streams_aware) {
|
|
GstStreamCollection *stream_collection;
|
|
GstMessage *msg;
|
|
|
|
g_assert (!demux->audio_stream);
|
|
demux->audio_stream =
|
|
gst_stream_new (stream_id, caps, GST_STREAM_TYPE_AUDIO,
|
|
GST_STREAM_FLAG_SELECT);
|
|
if (demux->audio_tags)
|
|
gst_stream_set_tags (demux->audio_stream, demux->audio_tags);
|
|
|
|
gst_event_set_stream (event, demux->audio_stream);
|
|
gst_pad_push_event (demux->audio_pad, event);
|
|
|
|
stream_collection = gst_stream_collection_new (demux->upstream_stream_id);
|
|
|
|
gst_stream_collection_add_stream (stream_collection,
|
|
gst_object_ref (demux->audio_stream));
|
|
if (demux->video_stream)
|
|
gst_stream_collection_add_stream (stream_collection,
|
|
gst_object_ref (demux->video_stream));
|
|
|
|
event = gst_event_new_stream_collection (stream_collection);
|
|
gst_pad_push_event (demux->audio_pad, event);
|
|
|
|
msg = gst_message_new_stream_collection (GST_OBJECT (demux),
|
|
stream_collection);
|
|
GST_DEBUG_OBJECT (demux, "Posting stream collection");
|
|
gst_element_post_message (GST_ELEMENT (demux), msg);
|
|
|
|
gst_clear_object (&stream_collection);
|
|
} else {
|
|
gst_pad_push_event (demux->audio_pad, event);
|
|
}
|
|
|
|
g_free (stream_id);
|
|
}
|
|
if (!old_caps || !gst_caps_is_equal (old_caps, caps))
|
|
ret = gst_pad_set_caps (demux->audio_pad, caps);
|
|
else
|
|
ret = TRUE;
|
|
|
|
if (old_caps)
|
|
gst_caps_unref (old_caps);
|
|
|
|
done:
|
|
if (G_LIKELY (ret)) {
|
|
/* Store the caps we got from tags */
|
|
demux->audio_codec_tag = codec_tag;
|
|
demux->rate = rate;
|
|
demux->channels = channels;
|
|
demux->width = width;
|
|
|
|
if (caps) {
|
|
GST_DEBUG_OBJECT (demux->audio_pad, "successfully negotiated caps %"
|
|
GST_PTR_FORMAT, caps);
|
|
|
|
gst_flv_demux_push_tags (demux);
|
|
} else {
|
|
GST_DEBUG_OBJECT (demux->audio_pad, "delayed setting caps");
|
|
}
|
|
} else {
|
|
GST_WARNING_OBJECT (demux->audio_pad, "failed negotiating caps %"
|
|
GST_PTR_FORMAT, caps);
|
|
}
|
|
|
|
if (caps)
|
|
gst_caps_unref (caps);
|
|
|
|
beach:
|
|
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 void
|
|
gst_flv_demux_add_codec_tag (GstFlvDemux * demux, const gchar * tag,
|
|
GstPad * pad)
|
|
{
|
|
if (pad) {
|
|
GstCaps *caps = gst_pad_get_current_caps (pad);
|
|
|
|
if (caps) {
|
|
gchar *codec_name = gst_pb_utils_get_codec_description (caps);
|
|
|
|
if (codec_name) {
|
|
gst_tag_list_add (demux->taglist, GST_TAG_MERGE_REPLACE,
|
|
tag, codec_name, NULL);
|
|
g_free (codec_name);
|
|
}
|
|
|
|
gst_caps_unref (caps);
|
|
}
|
|
}
|
|
}
|
|
|
|
static void
|
|
gst_flv_demux_push_tags (GstFlvDemux * demux)
|
|
{
|
|
GstEvent *tag_event;
|
|
|
|
gst_flv_demux_add_codec_tag (demux, GST_TAG_AUDIO_CODEC, demux->audio_pad);
|
|
gst_flv_demux_add_codec_tag (demux, GST_TAG_VIDEO_CODEC, demux->video_pad);
|
|
|
|
GST_DEBUG_OBJECT (demux, "pushing %" GST_PTR_FORMAT, demux->taglist);
|
|
|
|
tag_event = gst_event_new_tag (gst_tag_list_copy (demux->taglist));
|
|
if (demux->segment_seqnum != GST_SEQNUM_INVALID)
|
|
gst_event_set_seqnum (tag_event, demux->segment_seqnum);
|
|
gst_flv_demux_push_src_event (demux, tag_event);
|
|
|
|
if (demux->audio_pad) {
|
|
GST_DEBUG_OBJECT (demux->audio_pad, "pushing audio %" GST_PTR_FORMAT,
|
|
demux->audio_tags);
|
|
tag_event = gst_event_new_tag (gst_tag_list_copy (demux->audio_tags));
|
|
if (demux->segment_seqnum != GST_SEQNUM_INVALID)
|
|
gst_event_set_seqnum (tag_event, demux->segment_seqnum);
|
|
gst_pad_push_event (demux->audio_pad, tag_event);
|
|
}
|
|
|
|
if (demux->video_pad) {
|
|
GST_DEBUG_OBJECT (demux->video_pad, "pushing video %" GST_PTR_FORMAT,
|
|
demux->video_tags);
|
|
tag_event = gst_event_new_tag (gst_tag_list_copy (demux->video_tags));
|
|
if (demux->segment_seqnum != GST_SEQNUM_INVALID)
|
|
gst_event_set_seqnum (tag_event, demux->segment_seqnum);
|
|
gst_pad_push_event (demux->video_pad, tag_event);
|
|
}
|
|
}
|
|
|
|
static gboolean
|
|
gst_flv_demux_update_resync (GstFlvDemux * demux, guint32 dts, gboolean discont,
|
|
guint32 * last, GstClockTime * offset)
|
|
{
|
|
gboolean ret = FALSE;
|
|
gint32 ddts = dts - *last;
|
|
if (!discont && ddts <= -RESYNC_THRESHOLD) {
|
|
/* Theoretically, we should use subtract the duration of the last buffer,
|
|
but this demuxer sends no durations on buffers, not sure if it cannot
|
|
know, or just does not care to calculate. */
|
|
*offset -= ddts * GST_MSECOND;
|
|
GST_WARNING_OBJECT (demux,
|
|
"Large dts gap (%" G_GINT32_FORMAT " ms), assuming resync, offset now %"
|
|
GST_TIME_FORMAT "", ddts, GST_TIME_ARGS (*offset));
|
|
|
|
ret = TRUE;
|
|
}
|
|
*last = dts;
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void
|
|
gst_flv_demux_sync_streams (GstFlvDemux * demux)
|
|
{
|
|
/* Check if the audio or video stream are more than 3s behind the other
|
|
* stream, and if so send a gap event accordingly */
|
|
|
|
if (demux->audio_pad && GST_CLOCK_TIME_IS_VALID (demux->segment.position) &&
|
|
demux->last_audio_pts * GST_MSECOND + demux->audio_time_offset +
|
|
3 * GST_SECOND < demux->segment.position) {
|
|
GstEvent *event;
|
|
guint64 start =
|
|
demux->last_audio_pts * GST_MSECOND + demux->audio_time_offset;
|
|
guint64 stop = demux->segment.position - 3 * GST_SECOND;
|
|
|
|
GST_DEBUG_OBJECT (demux,
|
|
"Synchronizing audio stream with video stream by advancing time from %"
|
|
GST_TIME_FORMAT " to %" GST_TIME_FORMAT, GST_TIME_ARGS (start),
|
|
GST_TIME_ARGS (stop));
|
|
|
|
demux->last_audio_pts = (stop - demux->audio_time_offset) / GST_MSECOND;
|
|
|
|
event = gst_event_new_gap (start, stop - start);
|
|
if (demux->segment_seqnum != GST_SEQNUM_INVALID)
|
|
gst_event_set_seqnum (event, demux->segment_seqnum);
|
|
gst_pad_push_event (demux->audio_pad, event);
|
|
}
|
|
|
|
if (demux->video_pad && GST_CLOCK_TIME_IS_VALID (demux->segment.position) &&
|
|
demux->last_video_dts * GST_MSECOND + demux->video_time_offset +
|
|
3 * GST_SECOND < demux->segment.position) {
|
|
GstEvent *event;
|
|
guint64 start =
|
|
demux->last_video_dts * GST_MSECOND + demux->video_time_offset;
|
|
guint64 stop = demux->segment.position - 3 * GST_SECOND;
|
|
|
|
GST_DEBUG_OBJECT (demux,
|
|
"Synchronizing video stream with audio stream by advancing time from %"
|
|
GST_TIME_FORMAT " to %" GST_TIME_FORMAT, GST_TIME_ARGS (start),
|
|
GST_TIME_ARGS (stop));
|
|
|
|
demux->last_video_dts = (stop - demux->video_time_offset) / GST_MSECOND;
|
|
|
|
event = gst_event_new_gap (start, stop - start);
|
|
if (demux->segment_seqnum != GST_SEQNUM_INVALID)
|
|
gst_event_set_seqnum (event, demux->segment_seqnum);
|
|
gst_pad_push_event (demux->video_pad, event);
|
|
}
|
|
}
|
|
|
|
/* ensure demux->new_seg_event is set, (re)creating it if required.
|
|
*
|
|
* Returns: TRUE if the previous segment has been replaced and should be sent on the
|
|
* other stream pad as well.
|
|
*/
|
|
static gboolean
|
|
ensure_new_segment (GstFlvDemux * demux, GstPad * pad)
|
|
{
|
|
gboolean replaced_previous_segment = FALSE;
|
|
|
|
if (demux->new_seg_event) {
|
|
const GstSegment *segment;
|
|
|
|
gst_event_parse_segment (demux->new_seg_event, &segment);
|
|
if (demux->segment.position < segment->start) {
|
|
GST_DEBUG_OBJECT (pad,
|
|
"position is out of current segment boundaries, generate a new one");
|
|
g_clear_pointer (&demux->new_seg_event, gst_event_unref);
|
|
/* re-sending the segment on the other stream will create a GAP but
|
|
* this will only happen at the very beginning of the stream so it's
|
|
* not that bad.
|
|
*/
|
|
replaced_previous_segment = TRUE;
|
|
}
|
|
}
|
|
|
|
if (!demux->new_seg_event) {
|
|
GST_DEBUG_OBJECT (pad, "pushing newsegment from %"
|
|
GST_TIME_FORMAT " to %" GST_TIME_FORMAT,
|
|
GST_TIME_ARGS (demux->segment.position),
|
|
GST_TIME_ARGS (demux->segment.stop));
|
|
demux->segment.start = demux->segment.time = demux->segment.position;
|
|
demux->new_seg_event = gst_event_new_segment (&demux->segment);
|
|
if (demux->segment_seqnum != GST_SEQNUM_INVALID)
|
|
gst_event_set_seqnum (demux->new_seg_event, demux->segment_seqnum);
|
|
} else {
|
|
GST_DEBUG_OBJECT (pad, "pushing pre-generated newsegment event");
|
|
}
|
|
|
|
return replaced_previous_segment;
|
|
}
|
|
|
|
static GstFlowReturn
|
|
gst_flv_demux_parse_tag_audio (GstFlvDemux * demux, GstBuffer * buffer)
|
|
{
|
|
GstFlowReturn ret = GST_FLOW_OK;
|
|
guint32 pts = 0, codec_tag = 0, rate = 5512, width = 8, channels = 1;
|
|
guint32 codec_data = 0, pts_ext = 0;
|
|
guint8 flags = 0;
|
|
GstMapInfo map;
|
|
GstBuffer *outbuf;
|
|
guint8 *data;
|
|
|
|
GST_LOG_OBJECT (demux, "parsing an audio tag");
|
|
|
|
if (G_UNLIKELY (!demux->streams_aware && !demux->audio_pad
|
|
&& demux->no_more_pads)) {
|
|
#ifndef GST_DISABLE_DEBUG
|
|
if (G_UNLIKELY (!demux->no_audio_warned)) {
|
|
GST_WARNING_OBJECT (demux,
|
|
"Signaled no-more-pads already but had no audio pad -- ignoring");
|
|
demux->no_audio_warned = TRUE;
|
|
}
|
|
#endif
|
|
return GST_FLOW_OK;
|
|
}
|
|
|
|
g_return_val_if_fail (gst_buffer_get_size (buffer) == demux->tag_size,
|
|
GST_FLOW_ERROR);
|
|
|
|
/* Error out on tags with too small headers */
|
|
if (gst_buffer_get_size (buffer) < 11) {
|
|
GST_ERROR_OBJECT (demux, "Too small tag size (%" G_GSIZE_FORMAT ")",
|
|
gst_buffer_get_size (buffer));
|
|
return GST_FLOW_ERROR;
|
|
}
|
|
|
|
gst_buffer_map (buffer, &map, GST_MAP_READ);
|
|
data = map.data;
|
|
|
|
/* Grab information about audio tag */
|
|
pts = GST_READ_UINT24_BE (data);
|
|
/* read the pts extension to 32 bits integer */
|
|
pts_ext = GST_READ_UINT8 (data + 3);
|
|
/* Combine them */
|
|
pts |= pts_ext << 24;
|
|
|
|
GST_LOG_OBJECT (demux, "pts bytes %02X %02X %02X %02X (%d)", data[0], data[1],
|
|
data[2], data[3], pts);
|
|
|
|
/* Skip the stream id and go directly to the flags */
|
|
flags = GST_READ_UINT8 (data + 7);
|
|
|
|
/* Silently skip buffers with no data */
|
|
if (map.size == 11)
|
|
goto beach;
|
|
|
|
/* Channels */
|
|
if (flags & 0x01) {
|
|
channels = 2;
|
|
}
|
|
/* Width */
|
|
if (flags & 0x02) {
|
|
width = 16;
|
|
}
|
|
/* Sampling rate */
|
|
if ((flags & 0x0C) == 0x0C) {
|
|
rate = 44100;
|
|
} else if ((flags & 0x0C) == 0x08) {
|
|
rate = 22050;
|
|
} else if ((flags & 0x0C) == 0x04) {
|
|
rate = 11025;
|
|
}
|
|
/* Codec tag */
|
|
codec_tag = flags >> 4;
|
|
if (codec_tag == 10) { /* AAC has an extra byte for packet type */
|
|
codec_data = 2;
|
|
} else {
|
|
codec_data = 1;
|
|
}
|
|
|
|
/* codec tags with special rates */
|
|
if (codec_tag == 5 || codec_tag == 14 || codec_tag == 7 || codec_tag == 8)
|
|
rate = 8000;
|
|
else if ((codec_tag == 4) || (codec_tag == 11))
|
|
rate = 16000;
|
|
|
|
GST_LOG_OBJECT (demux, "audio tag with %d channels, %dHz sampling rate, "
|
|
"%d bits width, codec tag %u (flags %02X)", channels, rate, width,
|
|
codec_tag, flags);
|
|
|
|
if (codec_tag == 10) {
|
|
guint8 aac_packet_type = GST_READ_UINT8 (data + 8);
|
|
|
|
switch (aac_packet_type) {
|
|
case 0:
|
|
{
|
|
/* AudioSpecificConfig data */
|
|
GST_LOG_OBJECT (demux, "got an AAC codec data packet");
|
|
if (demux->audio_codec_data) {
|
|
gst_buffer_unref (demux->audio_codec_data);
|
|
}
|
|
demux->audio_codec_data =
|
|
gst_buffer_copy_region (buffer, GST_BUFFER_COPY_MEMORY,
|
|
7 + codec_data, demux->tag_data_size - codec_data);
|
|
|
|
/* Use that buffer data in the caps */
|
|
if (demux->audio_pad)
|
|
gst_flv_demux_audio_negotiate (demux, codec_tag, rate, channels,
|
|
width);
|
|
goto beach;
|
|
}
|
|
case 1:
|
|
if (!demux->audio_codec_data) {
|
|
GST_ERROR_OBJECT (demux, "got AAC audio packet before codec data");
|
|
ret = GST_FLOW_OK;
|
|
goto beach;
|
|
}
|
|
/* AAC raw packet */
|
|
GST_LOG_OBJECT (demux, "got a raw AAC audio packet");
|
|
break;
|
|
default:
|
|
GST_WARNING_OBJECT (demux, "invalid AAC packet type %u",
|
|
aac_packet_type);
|
|
}
|
|
}
|
|
|
|
/* If we don't have our audio pad created, then create it. */
|
|
if (G_UNLIKELY (!demux->audio_pad)) {
|
|
demux->audio_pad =
|
|
gst_pad_new_from_template (gst_element_class_get_pad_template
|
|
(GST_ELEMENT_GET_CLASS (demux), "audio"), "audio");
|
|
if (G_UNLIKELY (!demux->audio_pad)) {
|
|
GST_WARNING_OBJECT (demux, "failed creating audio pad");
|
|
ret = GST_FLOW_ERROR;
|
|
goto beach;
|
|
}
|
|
|
|
/* Set functions on the pad */
|
|
gst_pad_set_query_function (demux->audio_pad,
|
|
GST_DEBUG_FUNCPTR (gst_flv_demux_query));
|
|
gst_pad_set_event_function (demux->audio_pad,
|
|
GST_DEBUG_FUNCPTR (gst_flv_demux_src_event));
|
|
|
|
gst_pad_use_fixed_caps (demux->audio_pad);
|
|
|
|
/* Make it active */
|
|
gst_pad_set_active (demux->audio_pad, TRUE);
|
|
|
|
/* Negotiate caps */
|
|
if (!gst_flv_demux_audio_negotiate (demux, codec_tag, rate, channels,
|
|
width)) {
|
|
gst_object_unref (demux->audio_pad);
|
|
demux->audio_pad = NULL;
|
|
ret = GST_FLOW_ERROR;
|
|
goto beach;
|
|
}
|
|
#ifndef GST_DISABLE_GST_DEBUG
|
|
{
|
|
GstCaps *caps;
|
|
|
|
caps = gst_pad_get_current_caps (demux->audio_pad);
|
|
GST_DEBUG_OBJECT (demux, "created audio pad with caps %" GST_PTR_FORMAT,
|
|
caps);
|
|
if (caps)
|
|
gst_caps_unref (caps);
|
|
}
|
|
#endif
|
|
|
|
/* We need to set caps before adding */
|
|
gst_element_add_pad (GST_ELEMENT (demux),
|
|
gst_object_ref (demux->audio_pad));
|
|
gst_flow_combiner_add_pad (demux->flowcombiner, demux->audio_pad);
|
|
|
|
/* We only emit no more pads when we have audio and video. Indeed we can
|
|
* not trust the FLV header to tell us if there will be only audio or
|
|
* only video and we would just break discovery of some files */
|
|
if (demux->audio_pad && demux->video_pad && !demux->streams_aware) {
|
|
GST_DEBUG_OBJECT (demux, "emitting no more pads");
|
|
gst_element_no_more_pads (GST_ELEMENT (demux));
|
|
demux->no_more_pads = TRUE;
|
|
}
|
|
}
|
|
|
|
/* Check if caps have changed */
|
|
if (G_UNLIKELY (rate != demux->rate || channels != demux->channels ||
|
|
codec_tag != demux->audio_codec_tag || width != demux->width)) {
|
|
GST_DEBUG_OBJECT (demux, "audio settings have changed, changing caps");
|
|
|
|
gst_buffer_replace (&demux->audio_codec_data, NULL);
|
|
|
|
/* Negotiate caps */
|
|
if (!gst_flv_demux_audio_negotiate (demux, codec_tag, rate, channels,
|
|
width)) {
|
|
ret = GST_FLOW_ERROR;
|
|
goto beach;
|
|
}
|
|
}
|
|
|
|
/* Check if we have anything to push */
|
|
if (demux->tag_data_size <= codec_data) {
|
|
GST_LOG_OBJECT (demux, "Nothing left in this tag, returning");
|
|
goto beach;
|
|
}
|
|
|
|
/* Create buffer from pad */
|
|
outbuf = gst_buffer_copy_region (buffer, GST_BUFFER_COPY_MEMORY,
|
|
7 + codec_data, demux->tag_data_size - codec_data);
|
|
|
|
/* detect (and deem to be resyncs) large pts gaps */
|
|
if (gst_flv_demux_update_resync (demux, pts, demux->audio_need_discont,
|
|
&demux->last_audio_pts, &demux->audio_time_offset)) {
|
|
GST_BUFFER_FLAG_SET (outbuf, GST_BUFFER_FLAG_RESYNC);
|
|
}
|
|
|
|
/* Fill buffer with data */
|
|
GST_BUFFER_PTS (outbuf) = pts * GST_MSECOND + demux->audio_time_offset;
|
|
GST_BUFFER_DTS (outbuf) = GST_BUFFER_PTS (outbuf);
|
|
GST_BUFFER_DURATION (outbuf) = GST_CLOCK_TIME_NONE;
|
|
GST_BUFFER_OFFSET (outbuf) = demux->audio_offset++;
|
|
GST_BUFFER_OFFSET_END (outbuf) = demux->audio_offset;
|
|
|
|
if (demux->duration == GST_CLOCK_TIME_NONE ||
|
|
demux->duration < GST_BUFFER_TIMESTAMP (outbuf))
|
|
demux->duration = GST_BUFFER_TIMESTAMP (outbuf);
|
|
|
|
/* Only add audio frames to the index if we have no video,
|
|
* and if the index is not yet complete */
|
|
if (!demux->has_video && !demux->indexed) {
|
|
gst_flv_demux_parse_and_add_index_entry (demux,
|
|
GST_BUFFER_TIMESTAMP (outbuf), demux->cur_tag_offset, TRUE);
|
|
}
|
|
|
|
if (G_UNLIKELY (demux->audio_need_discont)) {
|
|
GST_BUFFER_FLAG_SET (outbuf, GST_BUFFER_FLAG_DISCONT);
|
|
demux->audio_need_discont = FALSE;
|
|
}
|
|
|
|
demux->segment.position = GST_BUFFER_TIMESTAMP (outbuf);
|
|
|
|
/* Do we need a newsegment event ? */
|
|
if (G_UNLIKELY (demux->audio_need_segment)) {
|
|
gboolean replaced_video_segment;
|
|
|
|
replaced_video_segment = ensure_new_segment (demux, demux->audio_pad);
|
|
gst_pad_push_event (demux->audio_pad, gst_event_ref (demux->new_seg_event));
|
|
|
|
if (replaced_video_segment) {
|
|
GST_DEBUG_OBJECT (demux->video_pad, "updating segment from %"
|
|
GST_TIME_FORMAT " to %" GST_TIME_FORMAT,
|
|
GST_TIME_ARGS (demux->segment.position),
|
|
GST_TIME_ARGS (demux->segment.stop));
|
|
|
|
gst_pad_push_event (demux->video_pad,
|
|
gst_event_ref (demux->new_seg_event));
|
|
}
|
|
|
|
demux->audio_need_segment = FALSE;
|
|
}
|
|
|
|
GST_LOG_OBJECT (demux,
|
|
"pushing %" G_GSIZE_FORMAT " bytes buffer at pts %" GST_TIME_FORMAT
|
|
" with duration %" GST_TIME_FORMAT ", offset %" G_GUINT64_FORMAT,
|
|
gst_buffer_get_size (outbuf),
|
|
GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (outbuf)),
|
|
GST_TIME_ARGS (GST_BUFFER_DURATION (outbuf)), GST_BUFFER_OFFSET (outbuf));
|
|
|
|
if (!GST_CLOCK_TIME_IS_VALID (demux->audio_start)) {
|
|
demux->audio_start = GST_BUFFER_TIMESTAMP (outbuf);
|
|
}
|
|
if (!GST_CLOCK_TIME_IS_VALID (demux->audio_first_ts)) {
|
|
demux->audio_first_ts = GST_BUFFER_TIMESTAMP (outbuf);
|
|
}
|
|
|
|
if (G_UNLIKELY (!demux->streams_aware && !demux->no_more_pads
|
|
&& (GST_CLOCK_DIFF (demux->audio_start,
|
|
GST_BUFFER_TIMESTAMP (outbuf)) > NO_MORE_PADS_THRESHOLD))) {
|
|
GST_DEBUG_OBJECT (demux,
|
|
"Signalling no-more-pads because no video stream was found"
|
|
" after 6 seconds of audio");
|
|
gst_element_no_more_pads (GST_ELEMENT_CAST (demux));
|
|
demux->no_more_pads = TRUE;
|
|
}
|
|
|
|
/* Push downstream */
|
|
ret = gst_pad_push (demux->audio_pad, outbuf);
|
|
|
|
if (G_UNLIKELY (ret != GST_FLOW_OK) &&
|
|
demux->segment.rate < 0.0 && ret == GST_FLOW_EOS &&
|
|
demux->segment.position > demux->segment.stop) {
|
|
/* In reverse playback we can get a GST_FLOW_EOS when
|
|
* we are at the end of the segment, so we just need to jump
|
|
* back to the previous section. */
|
|
GST_DEBUG_OBJECT (demux, "downstream has reached end of segment");
|
|
demux->audio_done = TRUE;
|
|
ret = GST_FLOW_OK;
|
|
goto beach;
|
|
}
|
|
|
|
ret = gst_flow_combiner_update_pad_flow (demux->flowcombiner,
|
|
demux->audio_pad, ret);
|
|
|
|
if (ret == GST_FLOW_OK) {
|
|
gst_flv_demux_sync_streams (demux);
|
|
}
|
|
|
|
beach:
|
|
gst_buffer_unmap (buffer, &map);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static gboolean
|
|
gst_flv_demux_video_negotiate (GstFlvDemux * demux, guint32 codec_tag)
|
|
{
|
|
gboolean ret = FALSE;
|
|
GstCaps *caps = NULL, *old_caps;
|
|
GstEvent *event;
|
|
gchar *stream_id;
|
|
|
|
/* Generate caps for that pad */
|
|
switch (codec_tag) {
|
|
case 2:
|
|
caps =
|
|
gst_caps_new_simple ("video/x-flash-video", "flvversion", G_TYPE_INT,
|
|
1, NULL);
|
|
break;
|
|
case 3:
|
|
caps = gst_caps_new_empty_simple ("video/x-flash-screen");
|
|
break;
|
|
case 4:
|
|
caps = gst_caps_new_empty_simple ("video/x-vp6-flash");
|
|
break;
|
|
case 5:
|
|
caps = gst_caps_new_empty_simple ("video/x-vp6-alpha");
|
|
break;
|
|
case 7:
|
|
if (!demux->video_codec_data) {
|
|
GST_DEBUG_OBJECT (demux, "don't have h264 codec data yet");
|
|
ret = TRUE;
|
|
goto done;
|
|
}
|
|
caps =
|
|
gst_caps_new_simple ("video/x-h264", "stream-format", G_TYPE_STRING,
|
|
"avc", NULL);
|
|
break;
|
|
/* The following two are non-standard but apparently used, see in ffmpeg
|
|
* https://git.videolan.org/?p=ffmpeg.git;a=blob;f=libavformat/flvdec.c;h=2bf1e059e1cbeeb79e4af9542da23f4560e1cf59;hb=b18d6c58000beed872d6bb1fe7d0fbe75ae26aef#l254
|
|
* https://git.videolan.org/?p=ffmpeg.git;a=blob;f=libavformat/flvdec.c;h=2bf1e059e1cbeeb79e4af9542da23f4560e1cf59;hb=b18d6c58000beed872d6bb1fe7d0fbe75ae26aef#l282
|
|
*/
|
|
case 8:
|
|
caps = gst_caps_new_empty_simple ("video/x-h263");
|
|
break;
|
|
case 9:
|
|
caps =
|
|
gst_caps_new_simple ("video/mpeg", "mpegversion", G_TYPE_INT, 4,
|
|
"systemstream", G_TYPE_BOOLEAN, FALSE, NULL);
|
|
break;
|
|
default:
|
|
GST_WARNING_OBJECT (demux, "unsupported video codec tag %u", codec_tag);
|
|
}
|
|
|
|
if (G_UNLIKELY (!caps)) {
|
|
GST_WARNING_OBJECT (demux, "failed creating caps for video pad");
|
|
goto beach;
|
|
}
|
|
|
|
if (demux->got_par) {
|
|
gst_caps_set_simple (caps, "pixel-aspect-ratio", GST_TYPE_FRACTION,
|
|
demux->par_x, demux->par_y, NULL);
|
|
}
|
|
|
|
if (G_LIKELY (demux->w)) {
|
|
gst_caps_set_simple (caps, "width", G_TYPE_INT, demux->w, NULL);
|
|
}
|
|
|
|
if (G_LIKELY (demux->h)) {
|
|
gst_caps_set_simple (caps, "height", G_TYPE_INT, demux->h, NULL);
|
|
}
|
|
|
|
if (G_LIKELY (demux->framerate)) {
|
|
gint num = 0, den = 0;
|
|
|
|
gst_video_guess_framerate (GST_SECOND / demux->framerate, &num, &den);
|
|
GST_DEBUG_OBJECT (demux->video_pad,
|
|
"fps to be used on caps %f (as a fraction = %d/%d)", demux->framerate,
|
|
num, den);
|
|
|
|
gst_caps_set_simple (caps, "framerate", GST_TYPE_FRACTION, num, den, NULL);
|
|
}
|
|
|
|
if (demux->video_codec_data) {
|
|
gst_caps_set_simple (caps, "codec_data", GST_TYPE_BUFFER,
|
|
demux->video_codec_data, NULL);
|
|
}
|
|
|
|
old_caps = gst_pad_get_current_caps (demux->video_pad);
|
|
if (!old_caps) {
|
|
stream_id =
|
|
gst_pad_create_stream_id (demux->video_pad, GST_ELEMENT_CAST (demux),
|
|
"video");
|
|
event = gst_event_new_stream_start (stream_id);
|
|
if (demux->segment_seqnum != GST_SEQNUM_INVALID)
|
|
gst_event_set_seqnum (event, demux->segment_seqnum);
|
|
|
|
if (have_group_id (demux))
|
|
gst_event_set_group_id (event, demux->group_id);
|
|
|
|
if (demux->streams_aware) {
|
|
GstStreamCollection *stream_collection;
|
|
GstMessage *msg;
|
|
|
|
g_assert (!demux->video_stream);
|
|
demux->video_stream =
|
|
gst_stream_new (stream_id, caps, GST_STREAM_TYPE_VIDEO,
|
|
GST_STREAM_FLAG_SELECT);
|
|
if (demux->video_tags)
|
|
gst_stream_set_tags (demux->video_stream, demux->video_tags);
|
|
|
|
gst_event_set_stream (event, demux->video_stream);
|
|
gst_pad_push_event (demux->video_pad, event);
|
|
|
|
stream_collection = gst_stream_collection_new (demux->upstream_stream_id);
|
|
|
|
if (demux->audio_stream)
|
|
gst_stream_collection_add_stream (stream_collection,
|
|
gst_object_ref (demux->audio_stream));
|
|
gst_stream_collection_add_stream (stream_collection,
|
|
gst_object_ref (demux->video_stream));
|
|
|
|
event = gst_event_new_stream_collection (stream_collection);
|
|
gst_pad_push_event (demux->video_pad, event);
|
|
|
|
msg = gst_message_new_stream_collection (GST_OBJECT (demux),
|
|
stream_collection);
|
|
GST_DEBUG_OBJECT (demux, "Posting stream collection");
|
|
gst_element_post_message (GST_ELEMENT (demux), msg);
|
|
|
|
gst_clear_object (&stream_collection);
|
|
} else {
|
|
gst_pad_push_event (demux->video_pad, event);
|
|
}
|
|
|
|
g_free (stream_id);
|
|
}
|
|
|
|
if (!old_caps || !gst_caps_is_equal (old_caps, caps))
|
|
ret = gst_pad_set_caps (demux->video_pad, caps);
|
|
else
|
|
ret = TRUE;
|
|
|
|
if (old_caps)
|
|
gst_caps_unref (old_caps);
|
|
|
|
done:
|
|
if (G_LIKELY (ret)) {
|
|
/* Store the caps we have set */
|
|
demux->video_codec_tag = codec_tag;
|
|
|
|
if (caps) {
|
|
GST_DEBUG_OBJECT (demux->video_pad, "successfully negotiated caps %"
|
|
GST_PTR_FORMAT, caps);
|
|
|
|
gst_flv_demux_push_tags (demux);
|
|
} else {
|
|
GST_DEBUG_OBJECT (demux->video_pad, "delayed setting caps");
|
|
}
|
|
} else {
|
|
GST_WARNING_OBJECT (demux->video_pad, "failed negotiating caps %"
|
|
GST_PTR_FORMAT, caps);
|
|
}
|
|
|
|
if (caps)
|
|
gst_caps_unref (caps);
|
|
|
|
beach:
|
|
return ret;
|
|
}
|
|
|
|
static GstFlowReturn
|
|
gst_flv_demux_parse_tag_video (GstFlvDemux * demux, GstBuffer * buffer)
|
|
{
|
|
GstFlowReturn ret = GST_FLOW_OK;
|
|
guint32 dts = 0, codec_data = 1, dts_ext = 0;
|
|
gint32 cts = 0;
|
|
gboolean keyframe = FALSE;
|
|
guint8 flags = 0, codec_tag = 0;
|
|
GstBuffer *outbuf;
|
|
GstMapInfo map;
|
|
guint8 *data;
|
|
|
|
g_return_val_if_fail (gst_buffer_get_size (buffer) == demux->tag_size,
|
|
GST_FLOW_ERROR);
|
|
|
|
GST_LOG_OBJECT (demux, "parsing a video tag");
|
|
|
|
if G_UNLIKELY
|
|
(!demux->streams_aware && !demux->video_pad && demux->no_more_pads) {
|
|
#ifndef GST_DISABLE_DEBUG
|
|
if G_UNLIKELY
|
|
(!demux->no_video_warned) {
|
|
GST_WARNING_OBJECT (demux,
|
|
"Signaled no-more-pads already but had no video pad -- ignoring");
|
|
demux->no_video_warned = TRUE;
|
|
}
|
|
#endif
|
|
return GST_FLOW_OK;
|
|
}
|
|
|
|
if (gst_buffer_get_size (buffer) < 12) {
|
|
GST_ERROR_OBJECT (demux, "Too small tag size");
|
|
return GST_FLOW_ERROR;
|
|
}
|
|
|
|
gst_buffer_map (buffer, &map, GST_MAP_READ);
|
|
data = map.data;
|
|
|
|
/* Grab information about video tag */
|
|
dts = GST_READ_UINT24_BE (data);
|
|
/* read the dts extension to 32 bits integer */
|
|
dts_ext = GST_READ_UINT8 (data + 3);
|
|
/* Combine them */
|
|
dts |= dts_ext << 24;
|
|
|
|
GST_LOG_OBJECT (demux, "dts bytes %02X %02X %02X %02X (%d)", data[0], data[1],
|
|
data[2], data[3], dts);
|
|
|
|
/* Skip the stream id and go directly to the flags */
|
|
flags = GST_READ_UINT8 (data + 7);
|
|
|
|
/* Keyframe */
|
|
if ((flags >> 4) == 1) {
|
|
keyframe = TRUE;
|
|
}
|
|
/* Codec tag */
|
|
codec_tag = flags & 0x0F;
|
|
if (codec_tag == 4 || codec_tag == 5) {
|
|
codec_data = 2;
|
|
} else if (codec_tag == 7) {
|
|
codec_data = 5;
|
|
|
|
cts = GST_READ_UINT24_BE (data + 9);
|
|
cts = (cts + 0xff800000) ^ 0xff800000;
|
|
|
|
if (cts < 0 && ABS (cts) > dts) {
|
|
GST_ERROR_OBJECT (demux, "Detected a negative composition time offset "
|
|
"'%d' that would lead to negative PTS, fixing", cts);
|
|
cts += ABS (cts) - dts;
|
|
}
|
|
|
|
GST_LOG_OBJECT (demux, "got cts %d", cts);
|
|
}
|
|
|
|
GST_LOG_OBJECT (demux, "video tag with codec tag %u, keyframe (%d) "
|
|
"(flags %02X)", codec_tag, keyframe, flags);
|
|
|
|
if (codec_tag == 7) {
|
|
guint8 avc_packet_type = GST_READ_UINT8 (data + 8);
|
|
|
|
switch (avc_packet_type) {
|
|
case 0:
|
|
{
|
|
if (demux->tag_data_size < codec_data) {
|
|
GST_ERROR_OBJECT (demux, "Got invalid H.264 codec, ignoring.");
|
|
break;
|
|
}
|
|
|
|
/* AVCDecoderConfigurationRecord data */
|
|
GST_LOG_OBJECT (demux, "got an H.264 codec data packet");
|
|
if (demux->video_codec_data) {
|
|
gst_buffer_unref (demux->video_codec_data);
|
|
}
|
|
demux->video_codec_data = gst_buffer_copy_region (buffer,
|
|
GST_BUFFER_COPY_MEMORY, 7 + codec_data,
|
|
demux->tag_data_size - codec_data);;
|
|
/* Use that buffer data in the caps */
|
|
if (demux->video_pad)
|
|
gst_flv_demux_video_negotiate (demux, codec_tag);
|
|
goto beach;
|
|
}
|
|
case 1:
|
|
/* H.264 NALU packet */
|
|
if (!demux->video_codec_data) {
|
|
GST_ERROR_OBJECT (demux, "got H.264 video packet before codec data");
|
|
ret = GST_FLOW_OK;
|
|
goto beach;
|
|
}
|
|
GST_LOG_OBJECT (demux, "got a H.264 NALU video packet");
|
|
break;
|
|
default:
|
|
GST_WARNING_OBJECT (demux, "invalid video packet type %u",
|
|
avc_packet_type);
|
|
}
|
|
}
|
|
|
|
/* If we don't have our video pad created, then create it. */
|
|
if (G_UNLIKELY (!demux->video_pad)) {
|
|
demux->video_pad =
|
|
gst_pad_new_from_template (gst_element_class_get_pad_template
|
|
(GST_ELEMENT_GET_CLASS (demux), "video"), "video");
|
|
if (G_UNLIKELY (!demux->video_pad)) {
|
|
GST_WARNING_OBJECT (demux, "failed creating video pad");
|
|
ret = GST_FLOW_ERROR;
|
|
goto beach;
|
|
}
|
|
|
|
/* Set functions on the pad */
|
|
gst_pad_set_query_function (demux->video_pad,
|
|
GST_DEBUG_FUNCPTR (gst_flv_demux_query));
|
|
gst_pad_set_event_function (demux->video_pad,
|
|
GST_DEBUG_FUNCPTR (gst_flv_demux_src_event));
|
|
|
|
gst_pad_use_fixed_caps (demux->video_pad);
|
|
|
|
/* Make it active */
|
|
gst_pad_set_active (demux->video_pad, TRUE);
|
|
|
|
/* Needs to be active before setting caps */
|
|
if (!gst_flv_demux_video_negotiate (demux, codec_tag)) {
|
|
gst_object_unref (demux->video_pad);
|
|
demux->video_pad = NULL;
|
|
ret = GST_FLOW_ERROR;
|
|
goto beach;
|
|
}
|
|
|
|
/* When we ve set pixel-aspect-ratio we use that boolean to detect a
|
|
* metadata tag that would come later and trigger a caps change */
|
|
demux->got_par = FALSE;
|
|
|
|
#ifndef GST_DISABLE_GST_DEBUG
|
|
{
|
|
GstCaps *caps;
|
|
|
|
caps = gst_pad_get_current_caps (demux->video_pad);
|
|
GST_DEBUG_OBJECT (demux, "created video pad with caps %" GST_PTR_FORMAT,
|
|
caps);
|
|
if (caps)
|
|
gst_caps_unref (caps);
|
|
}
|
|
#endif
|
|
|
|
/* We need to set caps before adding */
|
|
gst_element_add_pad (GST_ELEMENT (demux),
|
|
gst_object_ref (demux->video_pad));
|
|
gst_flow_combiner_add_pad (demux->flowcombiner, demux->video_pad);
|
|
|
|
/* We only emit no more pads when we have audio and video. Indeed we can
|
|
* not trust the FLV header to tell us if there will be only audio or
|
|
* only video and we would just break discovery of some files */
|
|
if (demux->audio_pad && demux->video_pad && !demux->streams_aware) {
|
|
GST_DEBUG_OBJECT (demux, "emitting no more pads");
|
|
gst_element_no_more_pads (GST_ELEMENT (demux));
|
|
demux->no_more_pads = TRUE;
|
|
}
|
|
}
|
|
|
|
/* Check if caps have changed */
|
|
if (G_UNLIKELY (codec_tag != demux->video_codec_tag || demux->got_par)) {
|
|
GST_DEBUG_OBJECT (demux, "video settings have changed, changing caps");
|
|
if (codec_tag != demux->video_codec_tag)
|
|
gst_buffer_replace (&demux->video_codec_data, NULL);
|
|
|
|
if (!gst_flv_demux_video_negotiate (demux, codec_tag)) {
|
|
ret = GST_FLOW_ERROR;
|
|
goto beach;
|
|
}
|
|
|
|
/* When we ve set pixel-aspect-ratio we use that boolean to detect a
|
|
* metadata tag that would come later and trigger a caps change */
|
|
demux->got_par = FALSE;
|
|
}
|
|
|
|
/* Check if we have anything to push */
|
|
if (demux->tag_data_size <= codec_data) {
|
|
GST_LOG_OBJECT (demux, "Nothing left in this tag, returning");
|
|
goto beach;
|
|
}
|
|
|
|
/* Create buffer from pad */
|
|
outbuf = gst_buffer_copy_region (buffer, GST_BUFFER_COPY_MEMORY,
|
|
7 + codec_data, demux->tag_data_size - codec_data);
|
|
|
|
/* detect (and deem to be resyncs) large dts gaps */
|
|
if (gst_flv_demux_update_resync (demux, dts, demux->video_need_discont,
|
|
&demux->last_video_dts, &demux->video_time_offset)) {
|
|
GST_BUFFER_FLAG_SET (outbuf, GST_BUFFER_FLAG_RESYNC);
|
|
}
|
|
|
|
/* Fill buffer with data */
|
|
GST_LOG_OBJECT (demux, "dts %u pts %u cts %d", dts, dts + cts, cts);
|
|
|
|
GST_BUFFER_PTS (outbuf) =
|
|
(dts + cts) * GST_MSECOND + demux->video_time_offset;
|
|
GST_BUFFER_DTS (outbuf) = dts * GST_MSECOND + demux->video_time_offset;
|
|
GST_BUFFER_DURATION (outbuf) = GST_CLOCK_TIME_NONE;
|
|
GST_BUFFER_OFFSET (outbuf) = demux->video_offset++;
|
|
GST_BUFFER_OFFSET_END (outbuf) = demux->video_offset;
|
|
|
|
if (demux->duration == GST_CLOCK_TIME_NONE ||
|
|
demux->duration < GST_BUFFER_TIMESTAMP (outbuf))
|
|
demux->duration = GST_BUFFER_TIMESTAMP (outbuf);
|
|
|
|
if (!keyframe)
|
|
GST_BUFFER_FLAG_SET (outbuf, GST_BUFFER_FLAG_DELTA_UNIT);
|
|
|
|
if (!demux->indexed) {
|
|
gst_flv_demux_parse_and_add_index_entry (demux,
|
|
GST_BUFFER_TIMESTAMP (outbuf), demux->cur_tag_offset, keyframe);
|
|
}
|
|
|
|
if (G_UNLIKELY (demux->video_need_discont)) {
|
|
GST_BUFFER_FLAG_SET (outbuf, GST_BUFFER_FLAG_DISCONT);
|
|
demux->video_need_discont = FALSE;
|
|
}
|
|
|
|
demux->segment.position = GST_BUFFER_TIMESTAMP (outbuf);
|
|
|
|
/* Do we need a newsegment event ? */
|
|
if (G_UNLIKELY (demux->video_need_segment)) {
|
|
gboolean replaced_audio_segment;
|
|
|
|
replaced_audio_segment = ensure_new_segment (demux, demux->video_pad);
|
|
gst_pad_push_event (demux->video_pad, gst_event_ref (demux->new_seg_event));
|
|
|
|
if (replaced_audio_segment) {
|
|
GST_DEBUG_OBJECT (demux->audio_pad, "updating segment from %"
|
|
GST_TIME_FORMAT " to %" GST_TIME_FORMAT,
|
|
GST_TIME_ARGS (demux->segment.position),
|
|
GST_TIME_ARGS (demux->segment.stop));
|
|
|
|
gst_pad_push_event (demux->audio_pad,
|
|
gst_event_ref (demux->new_seg_event));
|
|
}
|
|
|
|
demux->video_need_segment = FALSE;
|
|
}
|
|
|
|
GST_LOG_OBJECT (demux,
|
|
"pushing %" G_GSIZE_FORMAT " bytes buffer at dts %" GST_TIME_FORMAT
|
|
" with duration %" GST_TIME_FORMAT ", offset %" G_GUINT64_FORMAT
|
|
", keyframe (%d)", gst_buffer_get_size (outbuf),
|
|
GST_TIME_ARGS (GST_BUFFER_DTS (outbuf)),
|
|
GST_TIME_ARGS (GST_BUFFER_DURATION (outbuf)), GST_BUFFER_OFFSET (outbuf),
|
|
keyframe);
|
|
|
|
if (!GST_CLOCK_TIME_IS_VALID (demux->video_start)) {
|
|
demux->video_start = GST_BUFFER_TIMESTAMP (outbuf);
|
|
}
|
|
if (!GST_CLOCK_TIME_IS_VALID (demux->audio_first_ts)) {
|
|
demux->video_first_ts = GST_BUFFER_TIMESTAMP (outbuf);
|
|
}
|
|
|
|
if (G_UNLIKELY (!demux->streams_aware && !demux->no_more_pads
|
|
&& (GST_CLOCK_DIFF (demux->video_start,
|
|
GST_BUFFER_TIMESTAMP (outbuf)) > NO_MORE_PADS_THRESHOLD))) {
|
|
GST_DEBUG_OBJECT (demux,
|
|
"Signalling no-more-pads because no audio stream was found"
|
|
" after 6 seconds of video");
|
|
gst_element_no_more_pads (GST_ELEMENT_CAST (demux));
|
|
demux->no_more_pads = TRUE;
|
|
}
|
|
|
|
/* Push downstream */
|
|
ret = gst_pad_push (demux->video_pad, outbuf);
|
|
|
|
if (G_UNLIKELY (ret != GST_FLOW_OK) &&
|
|
demux->segment.rate < 0.0 && ret == GST_FLOW_EOS &&
|
|
demux->segment.position > demux->segment.stop) {
|
|
/* In reverse playback we can get a GST_FLOW_EOS when
|
|
* we are at the end of the segment, so we just need to jump
|
|
* back to the previous section. */
|
|
GST_DEBUG_OBJECT (demux, "downstream has reached end of segment");
|
|
demux->video_done = TRUE;
|
|
ret = GST_FLOW_OK;
|
|
goto beach;
|
|
}
|
|
|
|
ret = gst_flow_combiner_update_pad_flow (demux->flowcombiner,
|
|
demux->video_pad, ret);
|
|
|
|
if (ret == GST_FLOW_OK) {
|
|
gst_flv_demux_sync_streams (demux);
|
|
}
|
|
|
|
beach:
|
|
gst_buffer_unmap (buffer, &map);
|
|
return ret;
|
|
}
|
|
|
|
static GstClockTime
|
|
gst_flv_demux_parse_tag_timestamp (GstFlvDemux * demux, gboolean index,
|
|
GstBuffer * buffer, size_t *tag_size)
|
|
{
|
|
guint32 dts = 0, dts_ext = 0;
|
|
guint32 tag_data_size;
|
|
guint8 type;
|
|
gboolean keyframe = TRUE;
|
|
GstClockTime ret = GST_CLOCK_TIME_NONE;
|
|
GstMapInfo map;
|
|
guint8 *data;
|
|
gsize size;
|
|
|
|
g_return_val_if_fail (gst_buffer_get_size (buffer) >= 12,
|
|
GST_CLOCK_TIME_NONE);
|
|
|
|
gst_buffer_map (buffer, &map, GST_MAP_READ);
|
|
data = map.data;
|
|
size = map.size;
|
|
|
|
type = data[0];
|
|
|
|
if (type != 9 && type != 8 && type != 18) {
|
|
GST_WARNING_OBJECT (demux, "Unsupported tag type %u", data[0]);
|
|
goto exit;
|
|
}
|
|
|
|
if (type == 9)
|
|
demux->has_video = TRUE;
|
|
else if (type == 8)
|
|
demux->has_audio = TRUE;
|
|
|
|
tag_data_size = GST_READ_UINT24_BE (data + 1);
|
|
|
|
if (size >= tag_data_size + 11 + 4) {
|
|
if (GST_READ_UINT32_BE (data + tag_data_size + 11) != tag_data_size + 11) {
|
|
GST_WARNING_OBJECT (demux, "Invalid tag size");
|
|
goto exit;
|
|
}
|
|
}
|
|
|
|
if (tag_size)
|
|
*tag_size = tag_data_size + 11 + 4;
|
|
|
|
data += 4;
|
|
|
|
GST_LOG_OBJECT (demux, "dts bytes %02X %02X %02X %02X", data[0], data[1],
|
|
data[2], data[3]);
|
|
|
|
/* Grab timestamp of tag tag */
|
|
dts = GST_READ_UINT24_BE (data);
|
|
/* read the dts extension to 32 bits integer */
|
|
dts_ext = GST_READ_UINT8 (data + 3);
|
|
/* Combine them */
|
|
dts |= dts_ext << 24;
|
|
|
|
if (type == 9) {
|
|
data += 7;
|
|
|
|
keyframe = ((data[0] >> 4) == 1);
|
|
}
|
|
|
|
ret = dts * GST_MSECOND;
|
|
GST_LOG_OBJECT (demux, "dts: %" GST_TIME_FORMAT, GST_TIME_ARGS (ret));
|
|
|
|
if (index && !demux->indexed && (type == 9 || (type == 8
|
|
&& !demux->has_video))) {
|
|
gst_flv_demux_parse_and_add_index_entry (demux, ret, demux->offset,
|
|
keyframe);
|
|
}
|
|
|
|
if (demux->duration == GST_CLOCK_TIME_NONE || demux->duration < ret)
|
|
demux->duration = ret;
|
|
|
|
exit:
|
|
gst_buffer_unmap (buffer, &map);
|
|
return ret;
|
|
}
|
|
|
|
static GstFlowReturn
|
|
gst_flv_demux_parse_tag_type (GstFlvDemux * demux, GstBuffer * buffer)
|
|
{
|
|
GstFlowReturn ret = GST_FLOW_OK;
|
|
guint8 tag_type = 0;
|
|
GstMapInfo map;
|
|
|
|
g_return_val_if_fail (gst_buffer_get_size (buffer) >= 4, GST_FLOW_ERROR);
|
|
|
|
gst_buffer_map (buffer, &map, GST_MAP_READ);
|
|
|
|
tag_type = map.data[0];
|
|
|
|
/* Tag size is 1 byte of type + 3 bytes of size + 7 bytes + tag data size +
|
|
* 4 bytes of previous tag size */
|
|
demux->tag_data_size = GST_READ_UINT24_BE (map.data + 1);
|
|
demux->tag_size = demux->tag_data_size + 11;
|
|
|
|
GST_LOG_OBJECT (demux, "tag data size is %" G_GUINT64_FORMAT,
|
|
demux->tag_data_size);
|
|
|
|
gst_buffer_unmap (buffer, &map);
|
|
|
|
switch (tag_type) {
|
|
case 9:
|
|
demux->state = FLV_STATE_TAG_VIDEO;
|
|
demux->has_video = TRUE;
|
|
break;
|
|
case 8:
|
|
demux->state = FLV_STATE_TAG_AUDIO;
|
|
demux->has_audio = TRUE;
|
|
break;
|
|
case 18:
|
|
demux->state = FLV_STATE_TAG_SCRIPT;
|
|
break;
|
|
default:
|
|
GST_WARNING_OBJECT (demux, "unsupported tag type %u", tag_type);
|
|
demux->state = FLV_STATE_SKIP;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static GstFlowReturn
|
|
gst_flv_demux_parse_header (GstFlvDemux * demux, GstBuffer * buffer)
|
|
{
|
|
GstFlowReturn ret = GST_FLOW_OK;
|
|
GstMapInfo map;
|
|
|
|
g_return_val_if_fail (gst_buffer_get_size (buffer) >= 9, GST_FLOW_ERROR);
|
|
|
|
gst_buffer_map (buffer, &map, GST_MAP_READ);
|
|
|
|
/* Check for the FLV tag */
|
|
if (map.data[0] == 'F' && map.data[1] == 'L' && map.data[2] == 'V') {
|
|
GST_DEBUG_OBJECT (demux, "FLV header detected");
|
|
} else {
|
|
if (G_UNLIKELY (demux->strict)) {
|
|
GST_WARNING_OBJECT (demux, "invalid header tag detected");
|
|
ret = GST_FLOW_EOS;
|
|
goto beach;
|
|
}
|
|
}
|
|
|
|
if (map.data[3] == '1') {
|
|
GST_DEBUG_OBJECT (demux, "FLV version 1 detected");
|
|
} else {
|
|
if (G_UNLIKELY (demux->strict)) {
|
|
GST_WARNING_OBJECT (demux, "invalid header version detected");
|
|
ret = GST_FLOW_EOS;
|
|
goto beach;
|
|
}
|
|
|
|
}
|
|
|
|
/* Now look at audio/video flags */
|
|
{
|
|
guint8 flags = map.data[4];
|
|
|
|
demux->has_video = demux->has_audio = FALSE;
|
|
|
|
if (flags & 1) {
|
|
GST_DEBUG_OBJECT (demux, "there is a video stream");
|
|
demux->has_video = TRUE;
|
|
}
|
|
if (flags & 4) {
|
|
GST_DEBUG_OBJECT (demux, "there is an audio stream");
|
|
demux->has_audio = TRUE;
|
|
}
|
|
}
|
|
|
|
/* do a one-time seekability check */
|
|
gst_flv_demux_check_seekability (demux);
|
|
|
|
/* We don't care about the rest */
|
|
demux->need_header = FALSE;
|
|
|
|
beach:
|
|
gst_buffer_unmap (buffer, &map);
|
|
return ret;
|
|
}
|
|
|
|
|
|
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->have_group_id = FALSE;
|
|
demux->group_id = G_MAXUINT;
|
|
|
|
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;
|
|
|
|
demux->has_audio = FALSE;
|
|
demux->has_video = FALSE;
|
|
demux->got_par = FALSE;
|
|
|
|
demux->indexed = FALSE;
|
|
demux->upstream_seekable = FALSE;
|
|
demux->file_size = 0;
|
|
demux->segment_seqnum = 0;
|
|
|
|
demux->index_max_pos = 0;
|
|
demux->index_max_time = 0;
|
|
|
|
demux->audio_start = demux->video_start = GST_CLOCK_TIME_NONE;
|
|
demux->last_audio_pts = demux->last_video_dts = 0;
|
|
demux->audio_time_offset = demux->video_time_offset = 0;
|
|
|
|
demux->no_more_pads = FALSE;
|
|
|
|
#ifndef GST_DISABLE_DEBUG
|
|
demux->no_audio_warned = FALSE;
|
|
demux->no_video_warned = FALSE;
|
|
#endif
|
|
|
|
gst_segment_init (&demux->segment, GST_FORMAT_TIME);
|
|
|
|
demux->w = demux->h = 0;
|
|
demux->framerate = 0.0;
|
|
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;
|
|
}
|
|
|
|
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_flow_combiner_remove_pad (demux->flowcombiner, 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_flow_combiner_remove_pad (demux->flowcombiner, 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;
|
|
}
|
|
|
|
demux->video_bitrate = 0;
|
|
demux->audio_bitrate = 0;
|
|
|
|
gst_flv_demux_clear_tags (demux);
|
|
|
|
gst_clear_object (&demux->audio_stream);
|
|
gst_clear_object (&demux->video_stream);
|
|
g_clear_pointer (&demux->upstream_stream_id, (GDestroyNotify) g_free);
|
|
demux->streams_aware = GST_OBJECT_PARENT (demux)
|
|
&& GST_OBJECT_FLAG_IS_SET (GST_OBJECT_PARENT (demux),
|
|
GST_BIN_FLAG_STREAMS_AWARE);
|
|
}
|
|
|
|
/*
|
|
* 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);
|
|
if (demux->segment_seqnum != GST_SEQNUM_INVALID)
|
|
gst_event_set_seqnum (event, demux->segment_seqnum);
|
|
|
|
res = gst_pad_push_event (demux->sinkpad, event);
|
|
|
|
if (res)
|
|
demux->offset = offset;
|
|
return res;
|
|
}
|
|
|
|
static GstFlowReturn
|
|
gst_flv_demux_chain (GstPad * pad, GstObject * parent, GstBuffer * buffer)
|
|
{
|
|
GstFlowReturn ret = GST_FLOW_OK;
|
|
GstFlvDemux *demux = NULL;
|
|
|
|
demux = GST_FLV_DEMUX (parent);
|
|
|
|
GST_LOG_OBJECT (demux,
|
|
"received buffer of %" G_GSIZE_FORMAT " bytes at offset %"
|
|
G_GUINT64_FORMAT, gst_buffer_get_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);
|
|
}
|
|
|
|
if (GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_DISCONT)) {
|
|
GST_DEBUG_OBJECT (demux, "Discontinuity");
|
|
gst_adapter_clear (demux->adapter);
|
|
}
|
|
|
|
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)) {
|
|
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_FLUSHING;
|
|
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_demux_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_demux_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_demux_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_demux_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_demux_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)) {
|
|
guint64 seek_offset;
|
|
guint8 *data;
|
|
|
|
data = gst_adapter_take (demux->adapter, 4);
|
|
if (!data)
|
|
goto no_index;
|
|
|
|
seek_offset = demux->file_size - sizeof (guint32) -
|
|
GST_READ_UINT32_BE (data);
|
|
g_free (data);
|
|
|
|
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;
|
|
}
|
|
case FLV_STATE_SKIP:
|
|
/* Skip unknown tags (set in _parse_tag_type()) */
|
|
if (gst_adapter_available (demux->adapter) >= demux->tag_size) {
|
|
gst_adapter_flush (demux->adapter, demux->tag_size);
|
|
demux->offset += demux->tag_size;
|
|
demux->state = FLV_STATE_TAG_TYPE;
|
|
goto parse;
|
|
} else {
|
|
goto beach;
|
|
}
|
|
default:
|
|
GST_DEBUG_OBJECT (demux, "unexpected demuxer state");
|
|
}
|
|
|
|
beach:
|
|
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_get_size (*buffer) != size)) {
|
|
GST_WARNING_OBJECT (demux,
|
|
"partial pull got %" G_GSIZE_FORMAT " when expecting %d from offset %"
|
|
G_GUINT64_FORMAT, gst_buffer_get_size (*buffer), size, offset);
|
|
gst_buffer_unref (*buffer);
|
|
ret = GST_FLOW_EOS;
|
|
*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_demux_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 */
|
|
buffer = NULL;
|
|
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_demux_parse_tag_video (demux, buffer);
|
|
break;
|
|
case FLV_STATE_TAG_AUDIO:
|
|
ret = gst_flv_demux_parse_tag_audio (demux, buffer);
|
|
break;
|
|
case FLV_STATE_TAG_SCRIPT:
|
|
ret = gst_flv_demux_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)) {
|
|
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_demux_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_EOS;
|
|
GstIndex *index;
|
|
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");
|
|
|
|
index = gst_flv_demux_get_index (GST_ELEMENT (demux));
|
|
|
|
/* locate index entry before previous start position */
|
|
if (index) {
|
|
entry = gst_index_get_assoc_entry (index, demux->index_id,
|
|
GST_INDEX_LOOKUP_BEFORE, GST_ASSOCIATION_FLAG_KEY_UNIT,
|
|
GST_FORMAT_BYTES, demux->from_offset - 1);
|
|
|
|
if (entry) {
|
|
gint64 bytes = 0, time = 0;
|
|
|
|
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;
|
|
}
|
|
|
|
gst_object_unref (index);
|
|
}
|
|
|
|
done:
|
|
return ret;
|
|
}
|
|
|
|
static GstFlowReturn
|
|
gst_flv_demux_create_index (GstFlvDemux * demux, gint64 pos, GstClockTime ts)
|
|
{
|
|
gint64 size;
|
|
size_t tag_size;
|
|
guint64 old_offset;
|
|
GstBuffer *buffer;
|
|
GstClockTime tag_time;
|
|
GstFlowReturn ret = GST_FLOW_OK;
|
|
|
|
if (!gst_pad_peer_query_duration (demux->sinkpad, GST_FORMAT_BYTES, &size))
|
|
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;
|
|
|
|
buffer = NULL;
|
|
while ((ret = gst_flv_demux_pull_range (demux, demux->sinkpad, demux->offset,
|
|
12, &buffer)) == GST_FLOW_OK) {
|
|
tag_time =
|
|
gst_flv_demux_parse_tag_timestamp (demux, TRUE, buffer, &tag_size);
|
|
|
|
gst_buffer_unref (buffer);
|
|
buffer = NULL;
|
|
|
|
if (G_UNLIKELY (tag_time == GST_CLOCK_TIME_NONE || tag_time > ts))
|
|
goto exit;
|
|
|
|
demux->offset += tag_size;
|
|
}
|
|
|
|
if (ret == GST_FLOW_EOS) {
|
|
/* 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;
|
|
size_t tag_size, size;
|
|
GstBuffer *buffer = NULL;
|
|
GstMapInfo map;
|
|
|
|
if (!gst_pad_peer_query_duration (demux->sinkpad, GST_FORMAT_BYTES, &offset))
|
|
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;
|
|
|
|
gst_buffer_map (buffer, &map, GST_MAP_READ);
|
|
tag_size = GST_READ_UINT32_BE (map.data);
|
|
gst_buffer_unmap (buffer, &map);
|
|
GST_DEBUG_OBJECT (demux, "last tag size: %" G_GSIZE_FORMAT, tag_size);
|
|
gst_buffer_unref (buffer);
|
|
buffer = NULL;
|
|
|
|
if (G_UNLIKELY (offset < tag_size))
|
|
goto exit;
|
|
|
|
offset -= tag_size;
|
|
if (GST_FLOW_OK != gst_flv_demux_pull_range (demux, demux->sinkpad, offset,
|
|
12, &buffer))
|
|
goto exit;
|
|
|
|
/* a consistency check */
|
|
gst_buffer_map (buffer, &map, GST_MAP_READ);
|
|
size = GST_READ_UINT24_BE (map.data + 1);
|
|
if (size != tag_size - 11) {
|
|
gst_buffer_unmap (buffer, &map);
|
|
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_demux_parse_tag_timestamp (demux, FALSE, buffer, &size);
|
|
|
|
/* maybe get some more metadata */
|
|
if (map.data[0] == 18) {
|
|
gst_buffer_unmap (buffer, &map);
|
|
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_demux_parse_tag_script (demux, buffer);
|
|
} else {
|
|
gst_buffer_unmap (buffer, &map);
|
|
}
|
|
|
|
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_EOS;
|
|
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.position >= 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.position >= demux->segment.stop)) {
|
|
ret = GST_FLOW_EOS;
|
|
}
|
|
}
|
|
|
|
/* pause if something went wrong or at end */
|
|
if (G_UNLIKELY (ret != GST_FLOW_OK) && (demux->streams_aware
|
|
|| ret != GST_FLOW_NOT_LINKED || demux->no_more_pads))
|
|
goto pause;
|
|
|
|
gst_object_unref (demux);
|
|
|
|
return;
|
|
|
|
pause:
|
|
{
|
|
const gchar *reason = gst_flow_get_name (ret);
|
|
GstMessage *message;
|
|
GstEvent *event;
|
|
|
|
GST_LOG_OBJECT (demux, "pausing task, reason %s", reason);
|
|
gst_pad_pause_task (pad);
|
|
|
|
if (ret == GST_FLOW_EOS) {
|
|
/* handle end-of-stream/segment */
|
|
/* so align our position with the end of it, if there is one
|
|
* this ensures a subsequent will arrive at correct base/acc time */
|
|
if (demux->segment.rate > 0.0 &&
|
|
GST_CLOCK_TIME_IS_VALID (demux->segment.stop))
|
|
demux->segment.position = demux->segment.stop;
|
|
else if (demux->segment.rate < 0.0)
|
|
demux->segment.position = demux->segment.start;
|
|
|
|
/* perform EOS logic */
|
|
if (!demux->streams_aware && !demux->no_more_pads) {
|
|
gst_element_no_more_pads (GST_ELEMENT_CAST (demux));
|
|
demux->no_more_pads = TRUE;
|
|
}
|
|
|
|
if (demux->segment.flags & GST_SEGMENT_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");
|
|
message = gst_message_new_segment_done (GST_OBJECT_CAST (demux),
|
|
GST_FORMAT_TIME, stop);
|
|
gst_message_set_seqnum (message, demux->segment_seqnum);
|
|
gst_element_post_message (GST_ELEMENT_CAST (demux), message);
|
|
event = gst_event_new_segment_done (GST_FORMAT_TIME, stop);
|
|
gst_event_set_seqnum (event, demux->segment_seqnum);
|
|
gst_flv_demux_push_src_event (demux, event);
|
|
} else { /* Reverse playback */
|
|
GST_LOG_OBJECT (demux, "Sending segment done, at beginning of "
|
|
"segment");
|
|
message = gst_message_new_segment_done (GST_OBJECT_CAST (demux),
|
|
GST_FORMAT_TIME, demux->segment.start);
|
|
gst_message_set_seqnum (message, demux->segment_seqnum);
|
|
gst_element_post_message (GST_ELEMENT_CAST (demux), message);
|
|
event = gst_event_new_segment_done (GST_FORMAT_TIME,
|
|
demux->segment.start);
|
|
gst_event_set_seqnum (event, demux->segment_seqnum);
|
|
gst_flv_demux_push_src_event (demux, event);
|
|
}
|
|
} else {
|
|
/* normal playback, send EOS to all linked pads */
|
|
if (!demux->streams_aware && !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 (!demux->audio_pad && !demux->video_pad) {
|
|
GST_ELEMENT_ERROR (demux, STREAM, FAILED,
|
|
("Internal data stream error."), ("Got EOS before any data"));
|
|
} else {
|
|
event = gst_event_new_eos ();
|
|
if (demux->segment_seqnum != GST_SEQNUM_INVALID)
|
|
gst_event_set_seqnum (event, demux->segment_seqnum);
|
|
if (!gst_flv_demux_push_src_event (demux, event))
|
|
GST_WARNING_OBJECT (demux, "failed pushing EOS on streams");
|
|
}
|
|
}
|
|
} else if (ret == GST_FLOW_NOT_LINKED || ret < GST_FLOW_EOS) {
|
|
GST_ELEMENT_FLOW_ERROR (demux, ret);
|
|
event = gst_event_new_eos ();
|
|
if (demux->segment_seqnum != GST_SEQNUM_INVALID)
|
|
gst_event_set_seqnum (event, demux->segment_seqnum);
|
|
gst_flv_demux_push_src_event (demux, event);
|
|
}
|
|
gst_object_unref (demux);
|
|
return;
|
|
}
|
|
}
|
|
|
|
static guint64
|
|
gst_flv_demux_find_offset (GstFlvDemux * demux, GstSegment * segment,
|
|
GstSeekFlags seek_flags)
|
|
{
|
|
gint64 bytes = 0;
|
|
gint64 time = 0;
|
|
GstIndex *index;
|
|
GstIndexEntry *entry;
|
|
|
|
g_return_val_if_fail (segment != NULL, 0);
|
|
|
|
time = segment->position;
|
|
|
|
index = gst_flv_demux_get_index (GST_ELEMENT (demux));
|
|
|
|
if (index) {
|
|
/* Let's check if we have an index entry for that seek time */
|
|
entry = gst_index_get_assoc_entry (index, demux->index_id,
|
|
seek_flags & GST_SEEK_FLAG_SNAP_AFTER ?
|
|
GST_INDEX_LOOKUP_AFTER : 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->position), GST_TIME_ARGS (time), bytes);
|
|
|
|
/* Key frame seeking */
|
|
if (seek_flags & GST_SEEK_FLAG_KEY_UNIT) {
|
|
/* Adjust the segment so that the keyframe fits in */
|
|
segment->start = segment->time = time;
|
|
segment->position = time;
|
|
}
|
|
} else {
|
|
GST_DEBUG_OBJECT (demux, "no index entry found for %" GST_TIME_FORMAT,
|
|
GST_TIME_ARGS (segment->start));
|
|
}
|
|
|
|
gst_object_unref (index);
|
|
}
|
|
|
|
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, 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);
|
|
|
|
/* 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_do_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.position != demux->segment.position) {
|
|
/* Do the actual seeking */
|
|
guint64 offset = gst_flv_demux_find_offset (demux, &seeksegment, flags);
|
|
|
|
GST_DEBUG_OBJECT (demux, "generating an upstream seek at position %"
|
|
G_GUINT64_FORMAT, offset);
|
|
event = gst_event_new_seek (seeksegment.rate, GST_FORMAT_BYTES,
|
|
flags | GST_SEEK_FLAG_ACCURATE, GST_SEEK_TYPE_SET,
|
|
offset, GST_SEEK_TYPE_NONE, 0);
|
|
gst_event_set_seqnum (event, gst_event_get_seqnum (event));
|
|
ret = gst_pad_push_event (demux->sinkpad, event);
|
|
if (G_UNLIKELY (!ret)) {
|
|
GST_WARNING_OBJECT (demux, "upstream seek failed");
|
|
}
|
|
|
|
gst_flow_combiner_reset (demux->flowcombiner);
|
|
/* 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_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_segment (&demux->segment);
|
|
if (demux->segment_seqnum != GST_SEQNUM_INVALID)
|
|
gst_event_set_seqnum (demux->new_seg_event, demux->segment_seqnum);
|
|
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");
|
|
gst_event_unref (event);
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
static gboolean
|
|
gst_flv_demux_handle_seek_push (GstFlvDemux * demux, GstEvent * event)
|
|
{
|
|
GstFormat format;
|
|
|
|
gst_event_parse_seek (event, NULL, &format, NULL, NULL, NULL, NULL, NULL);
|
|
|
|
if (format != GST_FORMAT_TIME) {
|
|
GST_WARNING_OBJECT (demux, "we only support seeking in TIME format");
|
|
gst_event_unref (event);
|
|
return FALSE;
|
|
}
|
|
|
|
/* First try upstream */
|
|
if (gst_pad_push_event (demux->sinkpad, gst_event_ref (event))) {
|
|
GST_DEBUG_OBJECT (demux, "Upstream successfully seeked");
|
|
gst_event_unref (event);
|
|
return TRUE;
|
|
}
|
|
|
|
if (!demux->indexed) {
|
|
guint64 seek_offset = 0;
|
|
gboolean building_index;
|
|
|
|
GST_OBJECT_LOCK (demux);
|
|
/* handle the seek in the chain function */
|
|
demux->seeking = TRUE;
|
|
demux->state = FLV_STATE_SEEK;
|
|
|
|
/* copy the event */
|
|
gst_event_replace (&demux->seek_event, 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;
|
|
if (!demux->file_size
|
|
&& !gst_pad_peer_query_duration (demux->sinkpad, GST_FORMAT_BYTES,
|
|
&demux->file_size)) {
|
|
GST_WARNING_OBJECT (demux, "Failed to query upstream file size");
|
|
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, ret = FALSE;
|
|
GstSegment seeksegment;
|
|
GstEvent *flush_event;
|
|
GstMessage *message;
|
|
guint32 seqnum;
|
|
|
|
gst_event_parse_seek (event, &rate, &format, &flags,
|
|
&start_type, &start, &stop_type, &stop);
|
|
seqnum = gst_event_get_seqnum (event);
|
|
|
|
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);
|
|
|
|
if (flush) {
|
|
/* Flush start up and downstream to make sure data flow and loops are
|
|
idle */
|
|
flush_event = gst_event_new_flush_start ();
|
|
gst_event_set_seqnum (flush_event, seqnum);
|
|
gst_flv_demux_push_src_event (demux, flush_event);
|
|
|
|
flush_event = gst_event_new_flush_start ();
|
|
gst_event_set_seqnum (flush_event, seqnum);
|
|
gst_pad_push_event (demux->sinkpad, flush_event);
|
|
} else {
|
|
/* Pause the pulling task */
|
|
gst_pad_pause_task (demux->sinkpad);
|
|
}
|
|
|
|
/* Take the stream lock */
|
|
GST_PAD_STREAM_LOCK (demux->sinkpad);
|
|
demux->segment_seqnum = seqnum;
|
|
|
|
if (flush) {
|
|
/* Stop flushing upstream we need to pull */
|
|
flush_event = gst_event_new_flush_stop (TRUE);
|
|
gst_event_set_seqnum (flush_event, seqnum);
|
|
gst_pad_push_event (demux->sinkpad, flush_event);
|
|
}
|
|
|
|
/* 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_do_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.position != demux->segment.position) {
|
|
/* Do the actual seeking */
|
|
/* index is reliable if it is complete or we do not go to far ahead */
|
|
if (seeking && !demux->indexed &&
|
|
seeksegment.position > 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) {
|
|
flush_event = gst_event_new_flush_stop (TRUE);
|
|
gst_event_set_seqnum (flush_event, seqnum);
|
|
gst_flv_demux_push_src_event (demux, flush_event);
|
|
}
|
|
/* 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.position;
|
|
demux->state = FLV_STATE_SEEK;
|
|
/* do not know about success yet, but we did care and handled it */
|
|
ret = TRUE;
|
|
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, flags), TRUE);
|
|
ret = TRUE;
|
|
} else {
|
|
ret = TRUE;
|
|
}
|
|
|
|
if (flush) {
|
|
/* Stop flushing, the sinks are at time 0 now */
|
|
flush_event = gst_event_new_flush_stop (TRUE);
|
|
gst_event_set_seqnum (flush_event, seqnum);
|
|
gst_flv_demux_push_src_event (demux, flush_event);
|
|
}
|
|
|
|
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_SEGMENT_FLAG_SEGMENT) {
|
|
message = gst_message_new_segment_start (GST_OBJECT (demux),
|
|
demux->segment.format, demux->segment.position);
|
|
gst_message_set_seqnum (message, seqnum);
|
|
gst_element_post_message (GST_ELEMENT (demux), message);
|
|
}
|
|
|
|
gst_flow_combiner_reset (demux->flowcombiner);
|
|
/* 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_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_segment (&demux->segment);
|
|
gst_event_set_seqnum (demux->new_seg_event, seqnum);
|
|
}
|
|
|
|
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, NULL);
|
|
}
|
|
|
|
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 preferred */
|
|
static gboolean
|
|
gst_flv_demux_sink_activate (GstPad * sinkpad, GstObject * parent)
|
|
{
|
|
GstQuery *query;
|
|
gboolean pull_mode;
|
|
|
|
query = gst_query_new_scheduling ();
|
|
|
|
if (!gst_pad_peer_query (sinkpad, query)) {
|
|
gst_query_unref (query);
|
|
goto activate_push;
|
|
}
|
|
|
|
pull_mode = gst_query_has_scheduling_mode_with_flags (query,
|
|
GST_PAD_MODE_PULL, GST_SCHEDULING_FLAG_SEEKABLE);
|
|
gst_query_unref (query);
|
|
|
|
if (!pull_mode)
|
|
goto activate_push;
|
|
|
|
GST_DEBUG_OBJECT (sinkpad, "activating pull");
|
|
return gst_pad_activate_mode (sinkpad, GST_PAD_MODE_PULL, TRUE);
|
|
|
|
activate_push:
|
|
{
|
|
GST_DEBUG_OBJECT (sinkpad, "activating push");
|
|
return gst_pad_activate_mode (sinkpad, GST_PAD_MODE_PUSH, TRUE);
|
|
}
|
|
}
|
|
|
|
static gboolean
|
|
gst_flv_demux_sink_activate_mode (GstPad * sinkpad, GstObject * parent,
|
|
GstPadMode mode, gboolean active)
|
|
{
|
|
gboolean res;
|
|
GstFlvDemux *demux;
|
|
|
|
demux = GST_FLV_DEMUX (parent);
|
|
|
|
switch (mode) {
|
|
case GST_PAD_MODE_PUSH:
|
|
demux->random_access = FALSE;
|
|
res = TRUE;
|
|
break;
|
|
case GST_PAD_MODE_PULL:
|
|
if (active) {
|
|
demux->random_access = TRUE;
|
|
demux->segment_seqnum = gst_util_seqnum_next ();
|
|
res = gst_pad_start_task (sinkpad, (GstTaskFunction) gst_flv_demux_loop,
|
|
sinkpad, NULL);
|
|
} else {
|
|
demux->random_access = FALSE;
|
|
res = gst_pad_stop_task (sinkpad);
|
|
}
|
|
break;
|
|
default:
|
|
res = FALSE;
|
|
break;
|
|
}
|
|
return res;
|
|
}
|
|
|
|
static gboolean
|
|
gst_flv_demux_sink_event (GstPad * pad, GstObject * parent, GstEvent * event)
|
|
{
|
|
GstFlvDemux *demux;
|
|
gboolean ret = FALSE;
|
|
|
|
demux = GST_FLV_DEMUX (parent);
|
|
|
|
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:
|
|
{
|
|
GstIndex *index;
|
|
|
|
GST_DEBUG_OBJECT (demux, "received EOS");
|
|
|
|
index = gst_flv_demux_get_index (GST_ELEMENT (demux));
|
|
|
|
if (index) {
|
|
GST_DEBUG_OBJECT (demux, "committing index");
|
|
gst_index_commit (index, demux->index_id);
|
|
gst_object_unref (index);
|
|
}
|
|
|
|
if (!demux->audio_pad && !demux->video_pad) {
|
|
GST_ELEMENT_ERROR (demux, STREAM, FAILED,
|
|
("Internal data stream error."), ("Got EOS before any data"));
|
|
gst_event_unref (event);
|
|
} else {
|
|
if (!demux->streams_aware && !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_STREAM_START:
|
|
{
|
|
const gchar *stream_id;
|
|
|
|
GST_DEBUG_OBJECT (demux, "received stream start");
|
|
|
|
gst_event_parse_stream_start (event, &stream_id);
|
|
g_clear_pointer (&demux->upstream_stream_id, (GDestroyNotify) g_free);
|
|
demux->upstream_stream_id = g_strdup (stream_id);
|
|
|
|
ret = TRUE;
|
|
gst_event_unref (event);
|
|
|
|
break;
|
|
}
|
|
case GST_EVENT_SEGMENT:
|
|
{
|
|
GstSegment in_segment;
|
|
|
|
GST_DEBUG_OBJECT (demux, "received new segment");
|
|
|
|
gst_event_copy_segment (event, &in_segment);
|
|
demux->segment_seqnum = gst_event_get_seqnum (event);
|
|
|
|
if (in_segment.format == GST_FORMAT_TIME) {
|
|
/* time segment, this is perfect, copy over the values. */
|
|
memcpy (&demux->segment, &in_segment, sizeof (in_segment));
|
|
|
|
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);
|
|
if (demux->new_seg_event) {
|
|
gst_event_unref (demux->new_seg_event);
|
|
demux->new_seg_event = NULL;
|
|
}
|
|
}
|
|
gst_flow_combiner_reset (demux->flowcombiner);
|
|
break;
|
|
}
|
|
default:
|
|
ret = gst_pad_event_default (pad, parent, event);
|
|
break;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static gboolean
|
|
gst_flv_demux_sink_query (GstPad * pad, GstObject * parent, GstQuery * query)
|
|
{
|
|
GstFlvDemux *demux;
|
|
gboolean ret = FALSE;
|
|
|
|
demux = GST_FLV_DEMUX (parent);
|
|
|
|
switch (GST_QUERY_TYPE (query)) {
|
|
case GST_QUERY_BITRATE:
|
|
{
|
|
guint total_bitrate = 0;
|
|
|
|
if (demux->audio_pad) {
|
|
if (!demux->audio_bitrate) {
|
|
GST_DEBUG_OBJECT (demux,
|
|
"Have audio pad but no audio bitrate, can't answer BITRATE query");
|
|
break;
|
|
}
|
|
total_bitrate = demux->audio_bitrate;
|
|
}
|
|
if (demux->video_pad) {
|
|
if (!demux->video_bitrate) {
|
|
GST_DEBUG_OBJECT (demux,
|
|
"Have video pad but no video bitrate, can't answer BITRATE query");
|
|
break;
|
|
}
|
|
total_bitrate += demux->video_bitrate;
|
|
}
|
|
|
|
GST_DEBUG_OBJECT (demux,
|
|
"bitrate query. total_bitrate:%" G_GUINT32_FORMAT, total_bitrate);
|
|
|
|
if (total_bitrate) {
|
|
/* Padding of 2kbit/s for container overhead */
|
|
gst_query_set_bitrate (query, total_bitrate + 2048);
|
|
ret = TRUE;
|
|
}
|
|
break;
|
|
}
|
|
default:
|
|
ret = gst_pad_query_default (pad, parent, query);
|
|
break;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static gboolean
|
|
gst_flv_demux_src_event (GstPad * pad, GstObject * parent, GstEvent * event)
|
|
{
|
|
GstFlvDemux *demux;
|
|
gboolean ret = FALSE;
|
|
|
|
demux = GST_FLV_DEMUX (parent);
|
|
|
|
GST_DEBUG_OBJECT (demux, "handling event %s", GST_EVENT_TYPE_NAME (event));
|
|
|
|
switch (GST_EVENT_TYPE (event)) {
|
|
case GST_EVENT_SEEK:
|
|
/* Try to push upstream first */
|
|
gst_event_ref (event);
|
|
ret = gst_pad_push_event (demux->sinkpad, event);
|
|
if (ret) {
|
|
gst_event_unref (event);
|
|
break;
|
|
}
|
|
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;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static gboolean
|
|
gst_flv_demux_query (GstPad * pad, GstObject * parent, GstQuery * query)
|
|
{
|
|
gboolean res = TRUE;
|
|
GstFlvDemux *demux;
|
|
|
|
demux = GST_FLV_DEMUX (parent);
|
|
|
|
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;
|
|
}
|
|
|
|
/* Try to push upstream first */
|
|
res = gst_pad_peer_query (demux->sinkpad, query);
|
|
if (res)
|
|
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);
|
|
res = TRUE;
|
|
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.position));
|
|
|
|
gst_query_set_position (query, GST_FORMAT_TIME, demux->segment.position);
|
|
|
|
break;
|
|
}
|
|
|
|
case GST_QUERY_SEEKING:{
|
|
GstFormat fmt;
|
|
|
|
gst_query_parse_seeking (query, &fmt, NULL, NULL, NULL);
|
|
|
|
/* First ask upstream */
|
|
if (fmt == GST_FORMAT_TIME && gst_pad_peer_query (demux->sinkpad, query)) {
|
|
gboolean seekable;
|
|
|
|
gst_query_parse_seeking (query, NULL, &seekable, NULL, NULL);
|
|
if (seekable) {
|
|
res = TRUE;
|
|
break;
|
|
}
|
|
}
|
|
res = TRUE;
|
|
/* FIXME, check index this way is not thread safe */
|
|
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_SEGMENT:
|
|
{
|
|
GstFormat format;
|
|
gint64 start, stop;
|
|
|
|
format = demux->segment.format;
|
|
|
|
start =
|
|
gst_segment_to_stream_time (&demux->segment, format,
|
|
demux->segment.start);
|
|
if ((stop = demux->segment.stop) == -1)
|
|
stop = demux->segment.duration;
|
|
else
|
|
stop = gst_segment_to_stream_time (&demux->segment, format, stop);
|
|
|
|
gst_query_set_segment (query, demux->segment.rate, format, start, stop);
|
|
res = TRUE;
|
|
break;
|
|
}
|
|
case GST_QUERY_LATENCY:
|
|
default:
|
|
res = gst_pad_query_default (pad, parent, query);
|
|
break;
|
|
}
|
|
|
|
beach:
|
|
|
|
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 = g_object_new (gst_mem_index_get_type (), NULL);
|
|
|
|
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;
|
|
}
|
|
|
|
#if 0
|
|
static void
|
|
gst_flv_demux_set_index (GstElement * element, GstIndex * index)
|
|
{
|
|
GstFlvDemux *demux = GST_FLV_DEMUX (element);
|
|
GstIndex *old_index;
|
|
|
|
GST_OBJECT_LOCK (demux);
|
|
|
|
old_index = demux->index;
|
|
|
|
if (index) {
|
|
demux->index = gst_object_ref (index);
|
|
demux->own_index = FALSE;
|
|
} else
|
|
demux->index = NULL;
|
|
|
|
if (old_index)
|
|
gst_object_unref (demux->index);
|
|
|
|
gst_object_ref (index);
|
|
|
|
GST_OBJECT_UNLOCK (demux);
|
|
|
|
/* object lock might be taken again */
|
|
if (index)
|
|
gst_index_get_writer_id (index, GST_OBJECT (element), &demux->index_id);
|
|
|
|
GST_DEBUG_OBJECT (demux, "Set index %" GST_PTR_FORMAT, demux->index);
|
|
|
|
gst_object_unref (index);
|
|
}
|
|
#endif
|
|
|
|
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_unref (demux->taglist);
|
|
demux->taglist = NULL;
|
|
}
|
|
|
|
if (demux->audio_tags) {
|
|
gst_tag_list_unref (demux->audio_tags);
|
|
demux->audio_tags = NULL;
|
|
}
|
|
|
|
if (demux->video_tags) {
|
|
gst_tag_list_unref (demux->video_tags);
|
|
demux->video_tags = NULL;
|
|
}
|
|
|
|
if (demux->flowcombiner) {
|
|
gst_flow_combiner_free (demux->flowcombiner);
|
|
demux->flowcombiner = NULL;
|
|
}
|
|
|
|
if (demux->new_seg_event) {
|
|
gst_event_unref (demux->new_seg_event);
|
|
demux->new_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_class_init (GstFlvDemuxClass * klass)
|
|
{
|
|
GstElementClass *gstelement_class = GST_ELEMENT_CLASS (klass);
|
|
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
|
|
|
|
gobject_class->dispose = gst_flv_demux_dispose;
|
|
|
|
gstelement_class->change_state =
|
|
GST_DEBUG_FUNCPTR (gst_flv_demux_change_state);
|
|
|
|
#if 0
|
|
gstelement_class->set_index = GST_DEBUG_FUNCPTR (gst_flv_demux_set_index);
|
|
gstelement_class->get_index = GST_DEBUG_FUNCPTR (gst_flv_demux_get_index);
|
|
#endif
|
|
|
|
gst_element_class_add_static_pad_template (gstelement_class,
|
|
&flv_sink_template);
|
|
gst_element_class_add_static_pad_template (gstelement_class,
|
|
&audio_src_template);
|
|
gst_element_class_add_static_pad_template (gstelement_class,
|
|
&video_src_template);
|
|
gst_element_class_set_static_metadata (gstelement_class, "FLV Demuxer",
|
|
"Codec/Demuxer", "Demux FLV feeds into digital streams",
|
|
"Julien Moutte <julien@moutte.net>");
|
|
}
|
|
|
|
static void
|
|
gst_flv_demux_init (GstFlvDemux * demux)
|
|
{
|
|
demux->sinkpad =
|
|
gst_pad_new_from_static_template (&flv_sink_template, "sink");
|
|
GST_PAD_SET_ACCEPT_TEMPLATE (demux->sinkpad);
|
|
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_activatemode_function (demux->sinkpad,
|
|
GST_DEBUG_FUNCPTR (gst_flv_demux_sink_activate_mode));
|
|
gst_pad_set_query_function (demux->sinkpad,
|
|
GST_DEBUG_FUNCPTR (gst_flv_demux_sink_query));
|
|
|
|
gst_element_add_pad (GST_ELEMENT (demux), demux->sinkpad);
|
|
|
|
demux->adapter = gst_adapter_new ();
|
|
demux->flowcombiner = gst_flow_combiner_new ();
|
|
|
|
demux->own_index = FALSE;
|
|
|
|
GST_OBJECT_FLAG_SET (demux, GST_ELEMENT_FLAG_INDEXABLE);
|
|
|
|
gst_flv_demux_cleanup (demux);
|
|
}
|