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coral / imx-gst-plugins-good / e3f29db3a06d3958ff61d2ea2be2ef80712aab1d / . / gst / avi / gstavidemux.c
blob: c02ee896c05715bc87b785774643f59b2f5ae5e8 [file] [log] [blame]
/* GStreamer
* Copyright (C) <1999> Erik Walthinsen <omega@temple-baptist.com>
* Copyright (C) <2006> Nokia Corporation (contact <stefan.kost@nokia.com>)
* Copyright (C) <2009-2010> STEricsson <benjamin.gaignard@stericsson.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
/* Element-Checklist-Version: 5 */
/**
* SECTION:element-avidemux
*
* Demuxes an .avi file into raw or compressed audio and/or video streams.
*
* This element supports both push and pull-based scheduling, depending on the
* capabilities of the upstream elements.
*
* <refsect2>
* <title>Example launch line</title>
* |[
* gst-launch-1.0 filesrc location=test.avi ! avidemux name=demux demux.audio_00 ! decodebin ! audioconvert ! audioresample ! autoaudiosink demux.video_00 ! queue ! decodebin ! videoconvert ! videoscale ! autovideosink
* ]| Play (parse and decode) an .avi file and try to output it to
* an automatically detected soundcard and videosink. If the AVI file contains
* compressed audio or video data, this will only work if you have the
* right decoder elements/plugins installed.
* </refsect2>
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <string.h>
#include <stdio.h>
#include "gst/riff/riff-media.h"
#include "gstavidemux.h"
#include "avi-ids.h"
#include <gst/gst-i18n-plugin.h>
#include <gst/base/gstadapter.h>
#include <gst/tag/tag.h>
#define DIV_ROUND_UP(s,v) (((s) + ((v)-1)) / (v))
#define GST_AVI_KEYFRAME (1 << 0)
#define ENTRY_IS_KEYFRAME(e) ((e)->flags == GST_AVI_KEYFRAME)
#define ENTRY_SET_KEYFRAME(e) ((e)->flags = GST_AVI_KEYFRAME)
#define ENTRY_UNSET_KEYFRAME(e) ((e)->flags = 0)
GST_DEBUG_CATEGORY_STATIC (avidemux_debug);
#define GST_CAT_DEFAULT avidemux_debug
static GstStaticPadTemplate sink_templ = GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("video/x-msvideo")
);
#ifndef GST_DISABLE_GST_DEBUG
static const char *const snap_types[2][2] = {
{"any", "after"},
{"before", "nearest"},
};
#endif
static void gst_avi_demux_finalize (GObject * object);
static void gst_avi_demux_reset (GstAviDemux * avi);
#if 0
static const GstEventMask *gst_avi_demux_get_event_mask (GstPad * pad);
#endif
static gboolean gst_avi_demux_handle_src_event (GstPad * pad,
GstObject * parent, GstEvent * event);
static gboolean gst_avi_demux_handle_sink_event (GstPad * pad,
GstObject * parent, GstEvent * event);
static gboolean gst_avi_demux_push_event (GstAviDemux * avi, GstEvent * event);
#if 0
static const GstFormat *gst_avi_demux_get_src_formats (GstPad * pad);
#endif
static gboolean gst_avi_demux_handle_src_query (GstPad * pad,
GstObject * parent, GstQuery * query);
static gboolean gst_avi_demux_src_convert (GstPad * pad, GstFormat src_format,
gint64 src_value, GstFormat * dest_format, gint64 * dest_value);
static gboolean gst_avi_demux_do_seek (GstAviDemux * avi, GstSegment * segment,
GstSeekFlags flags);
static gboolean gst_avi_demux_handle_seek (GstAviDemux * avi, GstPad * pad,
GstEvent * event);
static gboolean gst_avi_demux_handle_seek_push (GstAviDemux * avi, GstPad * pad,
GstEvent * event);
static void gst_avi_demux_loop (GstPad * pad);
static gboolean gst_avi_demux_sink_activate (GstPad * sinkpad,
GstObject * parent);
static gboolean gst_avi_demux_sink_activate_mode (GstPad * sinkpad,
GstObject * parent, GstPadMode mode, gboolean active);
static GstFlowReturn gst_avi_demux_chain (GstPad * pad, GstObject * parent,
GstBuffer * buf);
#if 0
static void gst_avi_demux_set_index (GstElement * element, GstIndex * index);
static GstIndex *gst_avi_demux_get_index (GstElement * element);
#endif
static GstStateChangeReturn gst_avi_demux_change_state (GstElement * element,
GstStateChange transition);
static void gst_avi_demux_calculate_durations_from_index (GstAviDemux * avi);
static void gst_avi_demux_get_buffer_info (GstAviDemux * avi,
GstAviStream * stream, guint entry_n, GstClockTime * timestamp,
GstClockTime * ts_end, guint64 * offset, guint64 * offset_end);
static void gst_avi_demux_parse_idit (GstAviDemux * avi, GstBuffer * buf);
static void gst_avi_demux_parse_strd (GstAviDemux * avi, GstBuffer * buf);
static void parse_tag_value (GstAviDemux * avi, GstTagList * taglist,
const gchar * type, guint8 * ptr, guint tsize);
/* GObject methods */
#define gst_avi_demux_parent_class parent_class
G_DEFINE_TYPE (GstAviDemux, gst_avi_demux, GST_TYPE_ELEMENT);
static void
gst_avi_demux_class_init (GstAviDemuxClass * klass)
{
GstElementClass *gstelement_class = GST_ELEMENT_CLASS (klass);
GObjectClass *gobject_class = (GObjectClass *) klass;
GstPadTemplate *videosrctempl, *audiosrctempl, *subsrctempl, *subpicsrctempl;
GstCaps *audcaps, *vidcaps, *subcaps, *subpiccaps;
GST_DEBUG_CATEGORY_INIT (avidemux_debug, "avidemux",
0, "Demuxer for AVI streams");
gobject_class->finalize = gst_avi_demux_finalize;
gstelement_class->change_state =
GST_DEBUG_FUNCPTR (gst_avi_demux_change_state);
#if 0
gstelement_class->set_index = GST_DEBUG_FUNCPTR (gst_avi_demux_set_index);
gstelement_class->get_index = GST_DEBUG_FUNCPTR (gst_avi_demux_get_index);
#endif
audcaps = gst_riff_create_audio_template_caps ();
gst_caps_append (audcaps, gst_caps_new_empty_simple ("audio/x-avi-unknown"));
audiosrctempl = gst_pad_template_new ("audio_%u",
GST_PAD_SRC, GST_PAD_SOMETIMES, audcaps);
vidcaps = gst_riff_create_video_template_caps ();
gst_caps_append (vidcaps, gst_riff_create_iavs_template_caps ());
gst_caps_append (vidcaps, gst_caps_new_empty_simple ("video/x-avi-unknown"));
videosrctempl = gst_pad_template_new ("video_%u",
GST_PAD_SRC, GST_PAD_SOMETIMES, vidcaps);
subcaps = gst_caps_new_empty_simple ("application/x-subtitle-avi");
subsrctempl = gst_pad_template_new ("subtitle_%u",
GST_PAD_SRC, GST_PAD_SOMETIMES, subcaps);
subpiccaps = gst_caps_new_empty_simple ("subpicture/x-xsub");
subpicsrctempl = gst_pad_template_new ("subpicture_%u",
GST_PAD_SRC, GST_PAD_SOMETIMES, subpiccaps);
gst_element_class_add_pad_template (gstelement_class, audiosrctempl);
gst_element_class_add_pad_template (gstelement_class, videosrctempl);
gst_element_class_add_pad_template (gstelement_class, subsrctempl);
gst_element_class_add_pad_template (gstelement_class, subpicsrctempl);
gst_element_class_add_static_pad_template (gstelement_class, &sink_templ);
gst_caps_unref (audcaps);
gst_caps_unref (vidcaps);
gst_caps_unref (subcaps);
gst_caps_unref (subpiccaps);
gst_element_class_set_static_metadata (gstelement_class, "Avi demuxer",
"Codec/Demuxer",
"Demultiplex an avi file into audio and video",
"Erik Walthinsen <omega@cse.ogi.edu>, "
"Wim Taymans <wim.taymans@chello.be>, "
"Thijs Vermeir <thijsvermeir@gmail.com>");
}
static void
gst_avi_demux_init (GstAviDemux * avi)
{
avi->sinkpad = gst_pad_new_from_static_template (&sink_templ, "sink");
gst_pad_set_activate_function (avi->sinkpad,
GST_DEBUG_FUNCPTR (gst_avi_demux_sink_activate));
gst_pad_set_activatemode_function (avi->sinkpad,
GST_DEBUG_FUNCPTR (gst_avi_demux_sink_activate_mode));
gst_pad_set_chain_function (avi->sinkpad,
GST_DEBUG_FUNCPTR (gst_avi_demux_chain));
gst_pad_set_event_function (avi->sinkpad,
GST_DEBUG_FUNCPTR (gst_avi_demux_handle_sink_event));
gst_element_add_pad (GST_ELEMENT_CAST (avi), avi->sinkpad);
avi->adapter = gst_adapter_new ();
avi->flowcombiner = gst_flow_combiner_new ();
gst_avi_demux_reset (avi);
GST_OBJECT_FLAG_SET (avi, GST_ELEMENT_FLAG_INDEXABLE);
}
static void
gst_avi_demux_finalize (GObject * object)
{
GstAviDemux *avi = GST_AVI_DEMUX (object);
GST_DEBUG ("AVI: finalize");
g_object_unref (avi->adapter);
gst_flow_combiner_free (avi->flowcombiner);
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static void
gst_avi_demux_reset_stream (GstAviDemux * avi, GstAviStream * stream)
{
g_free (stream->strh);
g_free (stream->strf.data);
g_free (stream->name);
g_free (stream->index);
g_free (stream->indexes);
if (stream->initdata)
gst_buffer_unref (stream->initdata);
if (stream->extradata)
gst_buffer_unref (stream->extradata);
if (stream->rgb8_palette)
gst_buffer_unref (stream->rgb8_palette);
if (stream->pad) {
if (stream->exposed) {
gst_pad_set_active (stream->pad, FALSE);
gst_element_remove_pad (GST_ELEMENT_CAST (avi), stream->pad);
gst_flow_combiner_remove_pad (avi->flowcombiner, stream->pad);
} else
gst_object_unref (stream->pad);
}
if (stream->taglist) {
gst_tag_list_unref (stream->taglist);
stream->taglist = NULL;
}
memset (stream, 0, sizeof (GstAviStream));
}
static void
gst_avi_demux_reset (GstAviDemux * avi)
{
gint i;
GST_DEBUG ("AVI: reset");
for (i = 0; i < avi->num_streams; i++)
gst_avi_demux_reset_stream (avi, &avi->stream[i]);
avi->header_state = GST_AVI_DEMUX_HEADER_TAG_LIST;
avi->num_streams = 0;
avi->num_v_streams = 0;
avi->num_a_streams = 0;
avi->num_t_streams = 0;
avi->num_sp_streams = 0;
avi->main_stream = -1;
avi->have_group_id = FALSE;
avi->group_id = G_MAXUINT;
avi->state = GST_AVI_DEMUX_START;
avi->offset = 0;
avi->building_index = FALSE;
avi->index_offset = 0;
g_free (avi->avih);
avi->avih = NULL;
#if 0
if (avi->element_index)
gst_object_unref (avi->element_index);
avi->element_index = NULL;
#endif
if (avi->seg_event) {
gst_event_unref (avi->seg_event);
avi->seg_event = NULL;
}
if (avi->seek_event) {
gst_event_unref (avi->seek_event);
avi->seek_event = NULL;
}
if (avi->globaltags)
gst_tag_list_unref (avi->globaltags);
avi->globaltags = NULL;
avi->got_tags = TRUE; /* we always want to push global tags */
avi->have_eos = FALSE;
avi->seekable = TRUE;
gst_adapter_clear (avi->adapter);
gst_segment_init (&avi->segment, GST_FORMAT_TIME);
avi->segment_seqnum = 0;
}
/* GstElement methods */
#if 0
static const GstFormat *
gst_avi_demux_get_src_formats (GstPad * pad)
{
GstAviStream *stream = gst_pad_get_element_private (pad);
static const GstFormat src_a_formats[] = {
GST_FORMAT_TIME,
GST_FORMAT_BYTES,
GST_FORMAT_DEFAULT,
0
};
static const GstFormat src_v_formats[] = {
GST_FORMAT_TIME,
GST_FORMAT_DEFAULT,
0
};
return (stream->strh->type == GST_RIFF_FCC_auds ?
src_a_formats : src_v_formats);
}
#endif
/* assumes stream->strf.auds->av_bps != 0 */
static inline GstClockTime
avi_stream_convert_bytes_to_time_unchecked (GstAviStream * stream,
guint64 bytes)
{
return gst_util_uint64_scale_int (bytes, GST_SECOND,
stream->strf.auds->av_bps);
}
static inline guint64
avi_stream_convert_time_to_bytes_unchecked (GstAviStream * stream,
GstClockTime time)
{
return gst_util_uint64_scale_int (time, stream->strf.auds->av_bps,
GST_SECOND);
}
/* assumes stream->strh->rate != 0 */
static inline GstClockTime
avi_stream_convert_frames_to_time_unchecked (GstAviStream * stream,
guint64 frames)
{
return gst_util_uint64_scale (frames, stream->strh->scale * GST_SECOND,
stream->strh->rate);
}
static inline guint64
avi_stream_convert_time_to_frames_unchecked (GstAviStream * stream,
GstClockTime time)
{
return gst_util_uint64_scale (time, stream->strh->rate,
stream->strh->scale * GST_SECOND);
}
static gboolean
gst_avi_demux_src_convert (GstPad * pad,
GstFormat src_format,
gint64 src_value, GstFormat * dest_format, gint64 * dest_value)
{
GstAviStream *stream = gst_pad_get_element_private (pad);
gboolean res = TRUE;
GST_LOG_OBJECT (pad,
"Received src_format:%s, src_value:%" G_GUINT64_FORMAT
", dest_format:%s", gst_format_get_name (src_format), src_value,
gst_format_get_name (*dest_format));
if (G_UNLIKELY (src_format == *dest_format)) {
*dest_value = src_value;
goto done;
}
if (G_UNLIKELY (!stream->strh || !stream->strf.data)) {
res = FALSE;
goto done;
}
if (G_UNLIKELY (stream->strh->type == GST_RIFF_FCC_vids &&
(src_format == GST_FORMAT_BYTES
|| *dest_format == GST_FORMAT_BYTES))) {
res = FALSE;
goto done;
}
switch (src_format) {
case GST_FORMAT_TIME:
switch (*dest_format) {
case GST_FORMAT_BYTES:
*dest_value = gst_util_uint64_scale_int (src_value,
stream->strf.auds->av_bps, GST_SECOND);
break;
case GST_FORMAT_DEFAULT:
*dest_value =
gst_util_uint64_scale_round (src_value, stream->strh->rate,
stream->strh->scale * GST_SECOND);
break;
default:
res = FALSE;
break;
}
break;
case GST_FORMAT_BYTES:
switch (*dest_format) {
case GST_FORMAT_TIME:
if (stream->strf.auds->av_bps != 0) {
*dest_value = avi_stream_convert_bytes_to_time_unchecked (stream,
src_value);
} else
res = FALSE;
break;
default:
res = FALSE;
break;
}
break;
case GST_FORMAT_DEFAULT:
switch (*dest_format) {
case GST_FORMAT_TIME:
*dest_value =
avi_stream_convert_frames_to_time_unchecked (stream, src_value);
break;
default:
res = FALSE;
break;
}
break;
default:
res = FALSE;
}
done:
GST_LOG_OBJECT (pad,
"Returning res:%d dest_format:%s dest_value:%" G_GUINT64_FORMAT, res,
gst_format_get_name (*dest_format), *dest_value);
return res;
}
static gboolean
gst_avi_demux_handle_src_query (GstPad * pad, GstObject * parent,
GstQuery * query)
{
gboolean res = TRUE;
GstAviDemux *avi = GST_AVI_DEMUX (parent);
GstAviStream *stream = gst_pad_get_element_private (pad);
if (!stream->strh || !stream->strf.data)
return gst_pad_query_default (pad, parent, query);
switch (GST_QUERY_TYPE (query)) {
case GST_QUERY_POSITION:{
gint64 pos = 0;
GST_DEBUG ("pos query for stream %u: frames %u, bytes %u",
stream->num, stream->current_entry, stream->current_total);
/* FIXME, this looks clumsy */
if (stream->strh->type == GST_RIFF_FCC_auds) {
if (stream->is_vbr) {
/* VBR */
pos = avi_stream_convert_frames_to_time_unchecked (stream,
stream->current_entry);
GST_DEBUG_OBJECT (avi, "VBR convert frame %u, time %"
GST_TIME_FORMAT, stream->current_entry, GST_TIME_ARGS (pos));
} else if (stream->strf.auds->av_bps != 0) {
/* CBR */
pos = avi_stream_convert_bytes_to_time_unchecked (stream,
stream->current_total);
GST_DEBUG_OBJECT (avi,
"CBR convert bytes %u, time %" GST_TIME_FORMAT,
stream->current_total, GST_TIME_ARGS (pos));
} else if (stream->idx_n != 0 && stream->total_bytes != 0) {
/* calculate timestamps based on percentage of length */
guint64 xlen = avi->avih->us_frame *
avi->avih->tot_frames * GST_USECOND;
pos = gst_util_uint64_scale (xlen, stream->current_total,
stream->total_bytes);
GST_DEBUG_OBJECT (avi,
"CBR perc convert bytes %u, time %" GST_TIME_FORMAT,
stream->current_total, GST_TIME_ARGS (pos));
} else {
/* we don't know */
res = FALSE;
}
} else {
if (stream->strh->rate != 0) {
pos = gst_util_uint64_scale ((guint64) stream->current_entry *
stream->strh->scale, GST_SECOND, (guint64) stream->strh->rate);
} else {
pos = stream->current_entry * avi->avih->us_frame * GST_USECOND;
}
}
if (res) {
GST_DEBUG ("pos query : %" GST_TIME_FORMAT, GST_TIME_ARGS (pos));
gst_query_set_position (query, GST_FORMAT_TIME, pos);
} else
GST_WARNING ("pos query failed");
break;
}
case GST_QUERY_DURATION:
{
GstFormat fmt;
GstClockTime duration;
/* only act on audio or video streams */
if (stream->strh->type != GST_RIFF_FCC_auds &&
stream->strh->type != GST_RIFF_FCC_vids &&
stream->strh->type != GST_RIFF_FCC_iavs) {
res = FALSE;
break;
}
/* take stream duration, fall back to avih duration */
if ((duration = stream->duration) == -1)
if ((duration = stream->hdr_duration) == -1)
duration = avi->duration;
gst_query_parse_duration (query, &fmt, NULL);
switch (fmt) {
case GST_FORMAT_TIME:
gst_query_set_duration (query, fmt, duration);
break;
case GST_FORMAT_DEFAULT:
{
gint64 dur;
GST_DEBUG_OBJECT (query, "total frames is %" G_GUINT32_FORMAT,
stream->idx_n);
if (stream->idx_n > 0)
gst_query_set_duration (query, fmt, stream->idx_n);
else if (gst_pad_query_convert (pad, GST_FORMAT_TIME,
duration, fmt, &dur))
gst_query_set_duration (query, fmt, dur);
break;
}
default:
res = FALSE;
break;
}
break;
}
case GST_QUERY_SEEKING:{
GstFormat fmt;
gst_query_parse_seeking (query, &fmt, NULL, NULL, NULL);
if (fmt == GST_FORMAT_TIME) {
gboolean seekable = TRUE;
if (avi->streaming) {
seekable = avi->seekable;
}
gst_query_set_seeking (query, GST_FORMAT_TIME, seekable,
0, stream->duration);
res = TRUE;
}
break;
}
case GST_QUERY_CONVERT:{
GstFormat src_fmt, dest_fmt;
gint64 src_val, dest_val;
gst_query_parse_convert (query, &src_fmt, &src_val, &dest_fmt, &dest_val);
if ((res = gst_avi_demux_src_convert (pad, src_fmt, src_val, &dest_fmt,
&dest_val)))
gst_query_set_convert (query, src_fmt, src_val, dest_fmt, dest_val);
else
res = gst_pad_query_default (pad, parent, query);
break;
}
case GST_QUERY_SEGMENT:
{
GstFormat format;
gint64 start, stop;
format = avi->segment.format;
start =
gst_segment_to_stream_time (&avi->segment, format,
avi->segment.start);
if ((stop = avi->segment.stop) == -1)
stop = avi->segment.duration;
else
stop = gst_segment_to_stream_time (&avi->segment, format, stop);
gst_query_set_segment (query, avi->segment.rate, format, start, stop);
res = TRUE;
break;
}
default:
res = gst_pad_query_default (pad, parent, query);
break;
}
return res;
}
#if 0
static const GstEventMask *
gst_avi_demux_get_event_mask (GstPad * pad)
{
static const GstEventMask masks[] = {
{GST_EVENT_SEEK, GST_SEEK_METHOD_SET | GST_SEEK_FLAG_KEY_UNIT},
{0,}
};
return masks;
}
#endif
#if 0
static guint64
gst_avi_demux_seek_streams (GstAviDemux * avi, guint64 offset, gboolean before)
{
GstAviStream *stream;
GstIndexEntry *entry;
gint i;
gint64 val, min = offset;
for (i = 0; i < avi->num_streams; i++) {
stream = &avi->stream[i];
entry = gst_index_get_assoc_entry (avi->element_index, stream->index_id,
before ? GST_INDEX_LOOKUP_BEFORE : GST_INDEX_LOOKUP_AFTER,
GST_ASSOCIATION_FLAG_NONE, GST_FORMAT_BYTES, offset);
if (before) {
if (entry) {
gst_index_entry_assoc_map (entry, GST_FORMAT_BYTES, &val);
GST_DEBUG_OBJECT (avi, "stream %d, previous entry at %"
G_GUINT64_FORMAT, i, val);
if (val < min)
min = val;
}
continue;
}
if (!entry) {
GST_DEBUG_OBJECT (avi, "no position for stream %d, assuming at start", i);
stream->current_entry = 0;
stream->current_total = 0;
continue;
}
gst_index_entry_assoc_map (entry, GST_FORMAT_BYTES, &val);
GST_DEBUG_OBJECT (avi, "stream %d, next entry at %" G_GUINT64_FORMAT,
i, val);
gst_index_entry_assoc_map (entry, GST_FORMAT_TIME, &val);
stream->current_total = val;
gst_index_entry_assoc_map (entry, GST_FORMAT_DEFAULT, &val);
stream->current_entry = val;
}
return min;
}
#endif
static gint
gst_avi_demux_index_entry_offset_search (GstAviIndexEntry * entry,
guint64 * offset)
{
if (entry->offset < *offset)
return -1;
else if (entry->offset > *offset)
return 1;
return 0;
}
static guint64
gst_avi_demux_seek_streams_index (GstAviDemux * avi, guint64 offset,
gboolean before)
{
GstAviStream *stream;
GstAviIndexEntry *entry;
gint i;
gint64 val, min = offset;
guint index = 0;
for (i = 0; i < avi->num_streams; i++) {
stream = &avi->stream[i];
/* compensate for chunk header */
offset += 8;
entry =
gst_util_array_binary_search (stream->index, stream->idx_n,
sizeof (GstAviIndexEntry),
(GCompareDataFunc) gst_avi_demux_index_entry_offset_search,
before ? GST_SEARCH_MODE_BEFORE : GST_SEARCH_MODE_AFTER, &offset, NULL);
offset -= 8;
if (entry)
index = entry - stream->index;
if (before) {
if (entry) {
val = stream->index[index].offset;
GST_DEBUG_OBJECT (avi,
"stream %d, previous entry at %" G_GUINT64_FORMAT, i, val);
if (val < min)
min = val;
}
continue;
}
if (!entry) {
GST_DEBUG_OBJECT (avi, "no position for stream %d, assuming at start", i);
stream->current_entry = 0;
stream->current_total = 0;
continue;
}
val = stream->index[index].offset - 8;
GST_DEBUG_OBJECT (avi, "stream %d, next entry at %" G_GUINT64_FORMAT, i,
val);
stream->current_total = stream->index[index].total;
stream->current_entry = index;
}
return min;
}
#define GST_AVI_SEEK_PUSH_DISPLACE (4 * GST_SECOND)
static gboolean
gst_avi_demux_handle_sink_event (GstPad * pad, GstObject * parent,
GstEvent * event)
{
gboolean res = TRUE;
GstAviDemux *avi = GST_AVI_DEMUX (parent);
GST_DEBUG_OBJECT (avi,
"have event type %s: %p on sink pad", GST_EVENT_TYPE_NAME (event), event);
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_SEGMENT:
{
gint64 boffset, offset = 0;
GstSegment segment;
GstEvent *segment_event;
/* some debug output */
gst_event_copy_segment (event, &segment);
GST_DEBUG_OBJECT (avi, "received newsegment %" GST_SEGMENT_FORMAT,
&segment);
/* chain will send initial newsegment after pads have been added */
if (avi->state != GST_AVI_DEMUX_MOVI) {
GST_DEBUG_OBJECT (avi, "still starting, eating event");
goto exit;
}
/* we only expect a BYTE segment, e.g. following a seek */
if (segment.format != GST_FORMAT_BYTES) {
GST_DEBUG_OBJECT (avi, "unsupported segment format, ignoring");
goto exit;
}
if (avi->have_index) {
GstAviIndexEntry *entry;
guint i = 0, index = 0, k = 0;
GstAviStream *stream;
/* compensate chunk header, stored index offset points after header */
boffset = segment.start + 8;
/* find which stream we're on */
do {
stream = &avi->stream[i];
/* find the index for start bytes offset */
entry = gst_util_array_binary_search (stream->index,
stream->idx_n, sizeof (GstAviIndexEntry),
(GCompareDataFunc) gst_avi_demux_index_entry_offset_search,
GST_SEARCH_MODE_AFTER, &boffset, NULL);
if (entry == NULL)
continue;
index = entry - stream->index;
/* we are on the stream with a chunk start offset closest to start */
if (!offset || stream->index[index].offset < offset) {
offset = stream->index[index].offset;
k = i;
}
/* exact match needs no further searching */
if (stream->index[index].offset == boffset)
break;
} while (++i < avi->num_streams);
boffset -= 8;
offset -= 8;
stream = &avi->stream[k];
/* so we have no idea what is to come, or where we are */
if (!offset) {
GST_WARNING_OBJECT (avi, "insufficient index data, forcing EOS");
goto eos;
}
/* get the ts corresponding to start offset bytes for the stream */
gst_avi_demux_get_buffer_info (avi, stream, index,
(GstClockTime *) & segment.time, NULL, NULL, NULL);
#if 0
} else if (avi->element_index) {
GstIndexEntry *entry;
/* Let's check if we have an index entry for this position */
entry = gst_index_get_assoc_entry (avi->element_index, avi->index_id,
GST_INDEX_LOOKUP_AFTER, GST_ASSOCIATION_FLAG_NONE,
GST_FORMAT_BYTES, segment.start);
/* we can not go where we have not yet been before ... */
if (!entry) {
GST_WARNING_OBJECT (avi, "insufficient index data, forcing EOS");
goto eos;
}
gst_index_entry_assoc_map (entry, GST_FORMAT_TIME,
(gint64 *) & segment.time);
gst_index_entry_assoc_map (entry, GST_FORMAT_BYTES, &offset);
#endif
} else {
GST_WARNING_OBJECT (avi, "no index data, forcing EOS");
goto eos;
}
segment.format = GST_FORMAT_TIME;
segment.start = segment.time;
segment.stop = GST_CLOCK_TIME_NONE;
segment.position = segment.start;
/* rescue duration */
segment.duration = avi->segment.duration;
/* set up segment and send downstream */
gst_segment_copy_into (&segment, &avi->segment);
GST_DEBUG_OBJECT (avi, "Pushing newseg %" GST_SEGMENT_FORMAT, &segment);
avi->segment_seqnum = gst_event_get_seqnum (event);
segment_event = gst_event_new_segment (&segment);
gst_event_set_seqnum (segment_event, gst_event_get_seqnum (event));
gst_avi_demux_push_event (avi, segment_event);
GST_DEBUG_OBJECT (avi, "next chunk expected at %" G_GINT64_FORMAT,
boffset);
/* adjust state for streaming thread accordingly */
if (avi->have_index)
gst_avi_demux_seek_streams_index (avi, offset, FALSE);
#if 0
else
gst_avi_demux_seek_streams (avi, offset, FALSE);
#endif
/* set up streaming thread */
g_assert (offset >= boffset);
avi->offset = boffset;
avi->todrop = offset - boffset;
exit:
gst_event_unref (event);
res = TRUE;
break;
eos:
/* set up for EOS */
avi->have_eos = TRUE;
goto exit;
}
case GST_EVENT_EOS:
{
if (avi->state != GST_AVI_DEMUX_MOVI) {
gst_event_unref (event);
GST_ELEMENT_ERROR (avi, STREAM, DEMUX,
(NULL), ("got eos and didn't receive a complete header object"));
} else if (!gst_avi_demux_push_event (avi, event)) {
GST_ELEMENT_ERROR (avi, STREAM, DEMUX,
(NULL), ("got eos but no streams (yet)"));
}
break;
}
case GST_EVENT_FLUSH_STOP:
{
gint i;
gst_adapter_clear (avi->adapter);
avi->have_eos = FALSE;
for (i = 0; i < avi->num_streams; i++) {
avi->stream[i].discont = TRUE;
}
/* fall through to default case so that the event gets passed downstream */
}
default:
res = gst_pad_event_default (pad, parent, event);
break;
}
return res;
}
static gboolean
gst_avi_demux_handle_src_event (GstPad * pad, GstObject * parent,
GstEvent * event)
{
gboolean res = TRUE;
GstAviDemux *avi = GST_AVI_DEMUX (parent);
GST_DEBUG_OBJECT (avi,
"have event type %s: %p on src pad", GST_EVENT_TYPE_NAME (event), event);
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_SEEK:
if (!avi->streaming) {
res = gst_avi_demux_handle_seek (avi, pad, event);
} else {
res = gst_avi_demux_handle_seek_push (avi, pad, event);
}
gst_event_unref (event);
break;
default:
res = gst_pad_event_default (pad, parent, event);
break;
}
return res;
}
/* streaming helper (push) */
/*
* gst_avi_demux_peek_chunk_info:
* @avi: Avi object
* @tag: holder for tag
* @size: holder for tag size
*
* Peek next chunk info (tag and size)
*
* Returns: TRUE when one chunk info has been got
*/
static gboolean
gst_avi_demux_peek_chunk_info (GstAviDemux * avi, guint32 * tag, guint32 * size)
{
const guint8 *data = NULL;
if (gst_adapter_available (avi->adapter) < 8)
return FALSE;
data = gst_adapter_map (avi->adapter, 8);
*tag = GST_READ_UINT32_LE (data);
*size = GST_READ_UINT32_LE (data + 4);
gst_adapter_unmap (avi->adapter);
return TRUE;
}
/*
* gst_avi_demux_peek_chunk:
* @avi: Avi object
* @tag: holder for tag
* @size: holder for tag size
*
* Peek enough data for one full chunk
*
* Returns: %TRUE when one chunk has been got
*/
static gboolean
gst_avi_demux_peek_chunk (GstAviDemux * avi, guint32 * tag, guint32 * size)
{
guint32 peek_size = 0;
gint available;
if (!gst_avi_demux_peek_chunk_info (avi, tag, size))
goto peek_failed;
/* size 0 -> empty data buffer would surprise most callers,
* large size -> do not bother trying to squeeze that into adapter,
* so we throw poor man's exception, which can be caught if caller really
* wants to handle 0 size chunk */
if (!(*size) || (*size) >= (1 << 30))
goto strange_size;
peek_size = (*size + 1) & ~1;
available = gst_adapter_available (avi->adapter);
GST_DEBUG_OBJECT (avi,
"Need to peek chunk of %d bytes to read chunk %" GST_FOURCC_FORMAT
", %d bytes available", *size, GST_FOURCC_ARGS (*tag), available);
if (available < (8 + peek_size))
goto need_more;
return TRUE;
/* ERRORS */
peek_failed:
{
GST_INFO_OBJECT (avi, "Failed to peek");
return FALSE;
}
strange_size:
{
GST_INFO_OBJECT (avi,
"Invalid/unexpected chunk size %d for tag %" GST_FOURCC_FORMAT, *size,
GST_FOURCC_ARGS (*tag));
/* chain should give up */
avi->abort_buffering = TRUE;
return FALSE;
}
need_more:
{
GST_INFO_OBJECT (avi, "need more %d < %" G_GUINT32_FORMAT,
available, 8 + peek_size);
return FALSE;
}
}
/* AVI init */
/*
* gst_avi_demux_parse_file_header:
* @element: caller element (used for errors/debug).
* @buf: input data to be used for parsing.
*
* "Open" a RIFF/AVI file. The buffer should be at least 12
* bytes long. Takes ownership of @buf.
*
* Returns: TRUE if the file is a RIFF/AVI file, FALSE otherwise.
* Throws an error, caller should error out (fatal).
*/
static gboolean
gst_avi_demux_parse_file_header (GstElement * element, GstBuffer * buf)
{
guint32 doctype;
GstClockTime stamp;
stamp = gst_util_get_timestamp ();
/* riff_parse posts an error */
if (!gst_riff_parse_file_header (element, buf, &doctype))
return FALSE;
if (doctype != GST_RIFF_RIFF_AVI)
goto not_avi;
stamp = gst_util_get_timestamp () - stamp;
GST_DEBUG_OBJECT (element, "header parsing took %" GST_TIME_FORMAT,
GST_TIME_ARGS (stamp));
return TRUE;
/* ERRORS */
not_avi:
{
GST_ELEMENT_ERROR (element, STREAM, WRONG_TYPE, (NULL),
("File is not an AVI file: 0x%" G_GINT32_MODIFIER "x", doctype));
return FALSE;
}
}
/*
* Read AVI file tag when streaming
*/
static GstFlowReturn
gst_avi_demux_stream_init_push (GstAviDemux * avi)
{
if (gst_adapter_available (avi->adapter) >= 12) {
GstBuffer *tmp;
tmp = gst_adapter_take_buffer (avi->adapter, 12);
GST_DEBUG ("Parsing avi header");
if (!gst_avi_demux_parse_file_header (GST_ELEMENT_CAST (avi), tmp)) {
return GST_FLOW_ERROR;
}
GST_DEBUG ("header ok");
avi->offset += 12;
avi->state = GST_AVI_DEMUX_HEADER;
}
return GST_FLOW_OK;
}
/*
* Read AVI file tag
*/
static GstFlowReturn
gst_avi_demux_stream_init_pull (GstAviDemux * avi)
{
GstFlowReturn res;
GstBuffer *buf = NULL;
res = gst_pad_pull_range (avi->sinkpad, avi->offset, 12, &buf);
if (res != GST_FLOW_OK)
return res;
else if (!gst_avi_demux_parse_file_header (GST_ELEMENT_CAST (avi), buf))
goto wrong_header;
avi->offset += 12;
return GST_FLOW_OK;
/* ERRORS */
wrong_header:
{
GST_DEBUG_OBJECT (avi, "error parsing file header");
return GST_FLOW_ERROR;
}
}
/* AVI header handling */
/*
* gst_avi_demux_parse_avih:
* @avi: caller element (used for errors/debug).
* @buf: input data to be used for parsing.
* @avih: pointer to structure (filled in by function) containing
* stream information (such as flags, number of streams, etc.).
*
* Read 'avih' header. Discards buffer after use.
*
* Returns: TRUE on success, FALSE otherwise. Throws an error if
* the header is invalid. The caller should error out
* (fatal).
*/
static gboolean
gst_avi_demux_parse_avih (GstAviDemux * avi,
GstBuffer * buf, gst_riff_avih ** _avih)
{
gst_riff_avih *avih;
gsize size;
if (buf == NULL)
goto no_buffer;
size = gst_buffer_get_size (buf);
if (size < sizeof (gst_riff_avih))
goto avih_too_small;
avih = g_malloc (size);
gst_buffer_extract (buf, 0, avih, size);
#if (G_BYTE_ORDER == G_BIG_ENDIAN)
avih->us_frame = GUINT32_FROM_LE (avih->us_frame);
avih->max_bps = GUINT32_FROM_LE (avih->max_bps);
avih->pad_gran = GUINT32_FROM_LE (avih->pad_gran);
avih->flags = GUINT32_FROM_LE (avih->flags);
avih->tot_frames = GUINT32_FROM_LE (avih->tot_frames);
avih->init_frames = GUINT32_FROM_LE (avih->init_frames);
avih->streams = GUINT32_FROM_LE (avih->streams);
avih->bufsize = GUINT32_FROM_LE (avih->bufsize);
avih->width = GUINT32_FROM_LE (avih->width);
avih->height = GUINT32_FROM_LE (avih->height);
avih->scale = GUINT32_FROM_LE (avih->scale);
avih->rate = GUINT32_FROM_LE (avih->rate);
avih->start = GUINT32_FROM_LE (avih->start);
avih->length = GUINT32_FROM_LE (avih->length);
#endif
/* debug stuff */
GST_INFO_OBJECT (avi, "avih tag found:");
GST_INFO_OBJECT (avi, " us_frame %u", avih->us_frame);
GST_INFO_OBJECT (avi, " max_bps %u", avih->max_bps);
GST_INFO_OBJECT (avi, " pad_gran %u", avih->pad_gran);
GST_INFO_OBJECT (avi, " flags 0x%08x", avih->flags);
GST_INFO_OBJECT (avi, " tot_frames %u", avih->tot_frames);
GST_INFO_OBJECT (avi, " init_frames %u", avih->init_frames);
GST_INFO_OBJECT (avi, " streams %u", avih->streams);
GST_INFO_OBJECT (avi, " bufsize %u", avih->bufsize);
GST_INFO_OBJECT (avi, " width %u", avih->width);
GST_INFO_OBJECT (avi, " height %u", avih->height);
GST_INFO_OBJECT (avi, " scale %u", avih->scale);
GST_INFO_OBJECT (avi, " rate %u", avih->rate);
GST_INFO_OBJECT (avi, " start %u", avih->start);
GST_INFO_OBJECT (avi, " length %u", avih->length);
*_avih = avih;
gst_buffer_unref (buf);
if (avih->us_frame != 0 && avih->tot_frames != 0)
avi->duration =
(guint64) avih->us_frame * (guint64) avih->tot_frames * 1000;
else
avi->duration = GST_CLOCK_TIME_NONE;
GST_INFO_OBJECT (avi, " header duration %" GST_TIME_FORMAT,
GST_TIME_ARGS (avi->duration));
return TRUE;
/* ERRORS */
no_buffer:
{
GST_ELEMENT_ERROR (avi, STREAM, DEMUX, (NULL), ("No buffer"));
return FALSE;
}
avih_too_small:
{
GST_ELEMENT_ERROR (avi, STREAM, DEMUX, (NULL),
("Too small avih (%" G_GSIZE_FORMAT " available, %d needed)",
size, (int) sizeof (gst_riff_avih)));
gst_buffer_unref (buf);
return FALSE;
}
}
/*
* gst_avi_demux_parse_superindex:
* @avi: caller element (used for debugging/errors).
* @buf: input data to use for parsing.
* @locations: locations in the file (byte-offsets) that contain
* the actual indexes (see get_avi_demux_parse_subindex()).
* The array ends with GST_BUFFER_OFFSET_NONE.
*
* Reads superindex (openDML-2 spec stuff) from the provided data.
*
* Returns: TRUE on success, FALSE otherwise. Indexes should be skipped
* on error, but they are not fatal.
*/
static gboolean
gst_avi_demux_parse_superindex (GstAviDemux * avi,
GstBuffer * buf, guint64 ** _indexes)
{
GstMapInfo map;
guint8 *data;
guint16 bpe = 16;
guint32 num, i;
guint64 *indexes;
gsize size;
*_indexes = NULL;
if (buf) {
gst_buffer_map (buf, &map, GST_MAP_READ);
data = map.data;
size = map.size;
} else {
data = NULL;
size = 0;
}
if (size < 24)
goto too_small;
/* check type of index. The opendml2 specs state that
* there should be 4 dwords per array entry. Type can be
* either frame or field (and we don't care). */
if (GST_READ_UINT16_LE (data) != 4 ||
(data[2] & 0xfe) != 0x0 || data[3] != 0x0) {
GST_WARNING_OBJECT (avi,
"Superindex for stream has unexpected "
"size_entry %d (bytes) or flags 0x%02x/0x%02x",
GST_READ_UINT16_LE (data), data[2], data[3]);
bpe = GST_READ_UINT16_LE (data) * 4;
}
num = GST_READ_UINT32_LE (&data[4]);
GST_DEBUG_OBJECT (avi, "got %d indexes", num);
/* this can't work out well ... */
if (num > G_MAXUINT32 >> 1 || bpe < 8) {
goto invalid_params;
}
indexes = g_new (guint64, num + 1);
for (i = 0; i < num; i++) {
if (size < 24 + bpe * (i + 1))
break;
indexes[i] = GST_READ_UINT64_LE (&data[24 + bpe * i]);
GST_DEBUG_OBJECT (avi, "index %d at %" G_GUINT64_FORMAT, i, indexes[i]);
}
indexes[i] = GST_BUFFER_OFFSET_NONE;
*_indexes = indexes;
gst_buffer_unmap (buf, &map);
gst_buffer_unref (buf);
return TRUE;
/* ERRORS */
too_small:
{
GST_ERROR_OBJECT (avi,
"Not enough data to parse superindex (%" G_GSIZE_FORMAT
" available, 24 needed)", size);
if (buf) {
gst_buffer_unmap (buf, &map);
gst_buffer_unref (buf);
}
return FALSE;
}
invalid_params:
{
GST_ERROR_OBJECT (avi, "invalid index parameters (num = %d, bpe = %d)",
num, bpe);
gst_buffer_unmap (buf, &map);
gst_buffer_unref (buf);
return FALSE;
}
}
/* add an entry to the index of a stream. @num should be an estimate of the
* total amount of index entries for all streams and is used to dynamically
* allocate memory for the index entries. */
static inline gboolean
gst_avi_demux_add_index (GstAviDemux * avi, GstAviStream * stream,
guint num, GstAviIndexEntry * entry)
{
/* ensure index memory */
if (G_UNLIKELY (stream->idx_n >= stream->idx_max)) {
guint idx_max = stream->idx_max;
GstAviIndexEntry *new_idx;
/* we need to make some more room */
if (idx_max == 0) {
/* initial size guess, assume each stream has an equal amount of entries,
* overshoot with at least 8K */
idx_max = (num / avi->num_streams) + (8192 / sizeof (GstAviIndexEntry));
} else {
idx_max += 8192 / sizeof (GstAviIndexEntry);
GST_DEBUG_OBJECT (avi, "expanded index from %u to %u",
stream->idx_max, idx_max);
}
new_idx = g_try_renew (GstAviIndexEntry, stream->index, idx_max);
/* out of memory, if this fails stream->index is untouched. */
if (G_UNLIKELY (!new_idx))
return FALSE;
/* use new index */
stream->index = new_idx;
stream->idx_max = idx_max;
}
/* update entry total and stream stats. The entry total can be converted to
* the timestamp of the entry easily. */
if (stream->strh->type == GST_RIFF_FCC_auds) {
gint blockalign;
if (stream->is_vbr) {
entry->total = stream->total_blocks;
} else {
entry->total = stream->total_bytes;
}
blockalign = stream->strf.auds->blockalign;
if (blockalign > 0)
stream->total_blocks += DIV_ROUND_UP (entry->size, blockalign);
else
stream->total_blocks++;
} else {
if (stream->is_vbr) {
entry->total = stream->idx_n;
} else {
entry->total = stream->total_bytes;
}
}
stream->total_bytes += entry->size;
if (ENTRY_IS_KEYFRAME (entry))
stream->n_keyframes++;
/* and add */
GST_LOG_OBJECT (avi,
"Adding stream %u, index entry %d, kf %d, size %u "
", offset %" G_GUINT64_FORMAT ", total %" G_GUINT64_FORMAT, stream->num,
stream->idx_n, ENTRY_IS_KEYFRAME (entry), entry->size, entry->offset,
entry->total);
stream->index[stream->idx_n++] = *entry;
return TRUE;
}
/* given @entry_n in @stream, calculate info such as timestamps and
* offsets for the entry. */
static void
gst_avi_demux_get_buffer_info (GstAviDemux * avi, GstAviStream * stream,
guint entry_n, GstClockTime * timestamp, GstClockTime * ts_end,
guint64 * offset, guint64 * offset_end)
{
GstAviIndexEntry *entry;
entry = &stream->index[entry_n];
if (stream->is_vbr) {
/* VBR stream next timestamp */
if (stream->strh->type == GST_RIFF_FCC_auds) {
if (timestamp)
*timestamp =
avi_stream_convert_frames_to_time_unchecked (stream, entry->total);
if (ts_end) {
gint size = 1;
if (G_LIKELY (entry_n + 1 < stream->idx_n))
size = stream->index[entry_n + 1].total - entry->total;
*ts_end = avi_stream_convert_frames_to_time_unchecked (stream,
entry->total + size);
}
} else {
if (timestamp)
*timestamp =
avi_stream_convert_frames_to_time_unchecked (stream, entry_n);
if (ts_end)
*ts_end = avi_stream_convert_frames_to_time_unchecked (stream,
entry_n + 1);
}
} else if (stream->strh->type == GST_RIFF_FCC_auds) {
/* constant rate stream */
if (timestamp)
*timestamp =
avi_stream_convert_bytes_to_time_unchecked (stream, entry->total);
if (ts_end)
*ts_end = avi_stream_convert_bytes_to_time_unchecked (stream,
entry->total + entry->size);
}
if (stream->strh->type == GST_RIFF_FCC_vids) {
/* video offsets are the frame number */
if (offset)
*offset = entry_n;
if (offset_end)
*offset_end = entry_n + 1;
} else {
/* no offsets for audio */
if (offset)
*offset = -1;
if (offset_end)
*offset_end = -1;
}
}
/* collect and debug stats about the indexes for all streams.
* This method is also responsible for filling in the stream duration
* as measured by the amount of index entries.
*
* Returns TRUE if the index is not empty, else FALSE */
static gboolean
gst_avi_demux_do_index_stats (GstAviDemux * avi)
{
guint total_idx = 0;
guint i;
#ifndef GST_DISABLE_GST_DEBUG
guint total_max = 0;
#endif
/* get stream stats now */
for (i = 0; i < avi->num_streams; i++) {
GstAviStream *stream;
if (G_UNLIKELY (!(stream = &avi->stream[i])))
continue;
if (G_UNLIKELY (!stream->strh))
continue;
if (G_UNLIKELY (!stream->index || stream->idx_n == 0))
continue;
/* we interested in the end_ts of the last entry, which is the total
* duration of this stream */
gst_avi_demux_get_buffer_info (avi, stream, stream->idx_n - 1,
NULL, &stream->idx_duration, NULL, NULL);
total_idx += stream->idx_n;
#ifndef GST_DISABLE_GST_DEBUG
total_max += stream->idx_max;
#endif
GST_INFO_OBJECT (avi, "Stream %d, dur %" GST_TIME_FORMAT ", %6u entries, "
"%5u keyframes, entry size = %2u, total size = %10u, allocated %10u",
i, GST_TIME_ARGS (stream->idx_duration), stream->idx_n,
stream->n_keyframes, (guint) sizeof (GstAviIndexEntry),
(guint) (stream->idx_n * sizeof (GstAviIndexEntry)),
(guint) (stream->idx_max * sizeof (GstAviIndexEntry)));
/* knowing all that we do, that also includes avg bitrate */
if (!stream->taglist) {
stream->taglist = gst_tag_list_new_empty ();
}
if (stream->total_bytes && stream->idx_duration)
gst_tag_list_add (stream->taglist, GST_TAG_MERGE_REPLACE,
GST_TAG_BITRATE,
(guint) gst_util_uint64_scale (stream->total_bytes * 8,
GST_SECOND, stream->idx_duration), NULL);
}
total_idx *= sizeof (GstAviIndexEntry);
#ifndef GST_DISABLE_GST_DEBUG
total_max *= sizeof (GstAviIndexEntry);
#endif
GST_INFO_OBJECT (avi, "%u bytes for index vs %u ideally, %u wasted",
total_max, total_idx, total_max - total_idx);
if (total_idx == 0) {
GST_WARNING_OBJECT (avi, "Index is empty !");
return FALSE;
}
return TRUE;
}
/*
* gst_avi_demux_parse_subindex:
* @avi: Avi object
* @buf: input data to use for parsing.
* @stream: stream context.
* @entries_list: a list (returned by the function) containing all the
* indexes parsed in this specific subindex. The first
* entry is also a pointer to allocated memory that needs
* to be free´ed. May be NULL if no supported indexes were
* found.
*
* Reads superindex (openDML-2 spec stuff) from the provided data.
* The buffer should contain a GST_RIFF_TAG_ix?? chunk.
*
* Returns: TRUE on success, FALSE otherwise. Errors are fatal, we
* throw an error, caller should bail out asap.
*/
static gboolean
gst_avi_demux_parse_subindex (GstAviDemux * avi, GstAviStream * stream,
GstBuffer * buf)
{
GstMapInfo map;
guint8 *data;
guint16 bpe;
guint32 num, i;
guint64 baseoff;
if (buf == NULL)
return TRUE;
gst_buffer_map (buf, &map, GST_MAP_READ);
data = map.data;
/* check size */
if (map.size < 24)
goto too_small;
/* We don't support index-data yet */
if (data[3] & 0x80)
goto not_implemented;
/* check type of index. The opendml2 specs state that
* there should be 4 dwords per array entry. Type can be
* either frame or field (and we don't care). */
bpe = (data[2] & 0x01) ? 12 : 8;
if (GST_READ_UINT16_LE (data) != bpe / 4 ||
(data[2] & 0xfe) != 0x0 || data[3] != 0x1) {
GST_WARNING_OBJECT (avi,
"Superindex for stream %d has unexpected "
"size_entry %d (bytes) or flags 0x%02x/0x%02x",
stream->num, GST_READ_UINT16_LE (data), data[2], data[3]);
bpe = GST_READ_UINT16_LE (data) * 4;
}
num = GST_READ_UINT32_LE (&data[4]);
baseoff = GST_READ_UINT64_LE (&data[12]);
/* If there's nothing, just return ! */
if (num == 0)
goto empty_index;
GST_INFO_OBJECT (avi, "Parsing subindex, nr_entries = %6d", num);
for (i = 0; i < num; i++) {
GstAviIndexEntry entry;
if (map.size < 24 + bpe * (i + 1))
break;
/* fill in offset and size. offset contains the keyframe flag in the
* upper bit*/
entry.offset = baseoff + GST_READ_UINT32_LE (&data[24 + bpe * i]);
entry.size = GST_READ_UINT32_LE (&data[24 + bpe * i + 4]);
/* handle flags */
if (stream->strh->type == GST_RIFF_FCC_auds) {
/* all audio frames are keyframes */
ENTRY_SET_KEYFRAME (&entry);
} else {
/* else read flags */
entry.flags = (entry.size & 0x80000000) ? 0 : GST_AVI_KEYFRAME;
}
entry.size &= ~0x80000000;
/* and add */
if (G_UNLIKELY (!gst_avi_demux_add_index (avi, stream, num, &entry)))
goto out_of_mem;
}
done:
gst_buffer_unmap (buf, &map);
gst_buffer_unref (buf);
return TRUE;
/* ERRORS */
too_small:
{
GST_ERROR_OBJECT (avi,
"Not enough data to parse subindex (%" G_GSIZE_FORMAT
" available, 24 needed)", map.size);
goto done; /* continue */
}
not_implemented:
{
GST_ELEMENT_ERROR (avi, STREAM, NOT_IMPLEMENTED, (NULL),
("Subindex-is-data is not implemented"));
gst_buffer_unmap (buf, &map);
gst_buffer_unref (buf);
return FALSE;
}
empty_index:
{
GST_DEBUG_OBJECT (avi, "the index is empty");
goto done; /* continue */
}
out_of_mem:
{
GST_ELEMENT_ERROR (avi, RESOURCE, NO_SPACE_LEFT, (NULL),
("Cannot allocate memory for %u*%u=%u bytes",
(guint) sizeof (GstAviIndexEntry), num,
(guint) sizeof (GstAviIndexEntry) * num));
gst_buffer_unmap (buf, &map);
gst_buffer_unref (buf);
return FALSE;
}
}
/*
* Create and push a flushing seek event upstream
*/
static gboolean
perform_seek_to_offset (GstAviDemux * demux, guint64 offset, guint32 seqnum)
{
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);
gst_event_set_seqnum (event, seqnum);
res = gst_pad_push_event (demux->sinkpad, event);
if (res)
demux->offset = offset;
return res;
}
/*
* Read AVI index when streaming
*/
static gboolean
gst_avi_demux_read_subindexes_push (GstAviDemux * avi)
{
guint32 tag = 0, size;
GstBuffer *buf = NULL;
guint odml_stream;
GST_DEBUG_OBJECT (avi, "read subindexes for %d streams", avi->num_streams);
if (avi->odml_subidxs[avi->odml_subidx] != avi->offset)
return FALSE;
if (!gst_avi_demux_peek_chunk (avi, &tag, &size))
return TRUE;
/* this is the ODML chunk we expect */
odml_stream = avi->odml_stream;
if ((tag != GST_MAKE_FOURCC ('i', 'x', '0' + odml_stream / 10,
'0' + odml_stream % 10)) &&
(tag != GST_MAKE_FOURCC ('0' + odml_stream / 10,
'0' + odml_stream % 10, 'i', 'x'))) {
GST_WARNING_OBJECT (avi, "Not an ix## chunk (%" GST_FOURCC_FORMAT ")",
GST_FOURCC_ARGS (tag));
return FALSE;
}
avi->offset += 8 + GST_ROUND_UP_2 (size);
/* flush chunk header so we get just the 'size' payload data */
gst_adapter_flush (avi->adapter, 8);
buf = gst_adapter_take_buffer (avi->adapter, size);
if (!gst_avi_demux_parse_subindex (avi, &avi->stream[odml_stream], buf))
return FALSE;
/* we parsed the index, go to next subindex */
avi->odml_subidx++;
if (avi->odml_subidxs[avi->odml_subidx] == GST_BUFFER_OFFSET_NONE) {
/* we reached the end of the indexes for this stream, move to the next
* stream to handle the first index */
avi->odml_stream++;
avi->odml_subidx = 0;
if (avi->odml_stream < avi->num_streams) {
/* there are more indexes */
avi->odml_subidxs = avi->stream[avi->odml_stream].indexes;
} else {
/* we're done, get stream stats now */
avi->have_index = gst_avi_demux_do_index_stats (avi);
return TRUE;
}
}
/* seek to next index */
return perform_seek_to_offset (avi, avi->odml_subidxs[avi->odml_subidx],
avi->segment_seqnum);
}
/*
* Read AVI index
*/
static void
gst_avi_demux_read_subindexes_pull (GstAviDemux * avi)
{
guint32 tag;
GstBuffer *buf;
gint i, n;
GST_DEBUG_OBJECT (avi, "read subindexes for %d streams", avi->num_streams);
for (n = 0; n < avi->num_streams; n++) {
GstAviStream *stream = &avi->stream[n];
if (stream->indexes == NULL)
continue;
for (i = 0; stream->indexes[i] != GST_BUFFER_OFFSET_NONE; i++) {
if (gst_riff_read_chunk (GST_ELEMENT_CAST (avi), avi->sinkpad,
&stream->indexes[i], &tag, &buf) != GST_FLOW_OK)
continue;
else if ((tag != GST_MAKE_FOURCC ('i', 'x', '0' + stream->num / 10,
'0' + stream->num % 10)) &&
(tag != GST_MAKE_FOURCC ('0' + stream->num / 10,
'0' + stream->num % 10, 'i', 'x'))) {
/* Some ODML files (created by god knows what muxer) have a ##ix format
* instead of the 'official' ix##. They are still valid though. */
GST_WARNING_OBJECT (avi, "Not an ix## chunk (%" GST_FOURCC_FORMAT ")",
GST_FOURCC_ARGS (tag));
gst_buffer_unref (buf);
continue;
}
if (!gst_avi_demux_parse_subindex (avi, stream, buf))
continue;
}
g_free (stream->indexes);
stream->indexes = NULL;
}
/* get stream stats now */
avi->have_index = gst_avi_demux_do_index_stats (avi);
}
/*
* gst_avi_demux_riff_parse_vprp:
* @element: caller element (used for debugging/error).
* @buf: input data to be used for parsing, stripped from header.
* @vprp: a pointer (returned by this function) to a filled-in vprp
* structure. Caller should free it.
*
* Parses a video stream´s vprp. This function takes ownership of @buf.
*
* Returns: TRUE if parsing succeeded, otherwise FALSE. The stream
* should be skipped on error, but it is not fatal.
*/
static gboolean
gst_avi_demux_riff_parse_vprp (GstElement * element,
GstBuffer * buf, gst_riff_vprp ** _vprp)
{
gst_riff_vprp *vprp;
gint k;
gsize size;
g_return_val_if_fail (buf != NULL, FALSE);
g_return_val_if_fail (_vprp != NULL, FALSE);
size = gst_buffer_get_size (buf);
if (size < G_STRUCT_OFFSET (gst_riff_vprp, field_info))
goto too_small;
vprp = g_malloc (size);
gst_buffer_extract (buf, 0, vprp, size);
#if (G_BYTE_ORDER == G_BIG_ENDIAN)
vprp->format_token = GUINT32_FROM_LE (vprp->format_token);
vprp->standard = GUINT32_FROM_LE (vprp->standard);
vprp->vert_rate = GUINT32_FROM_LE (vprp->vert_rate);
vprp->hor_t_total = GUINT32_FROM_LE (vprp->hor_t_total);
vprp->vert_lines = GUINT32_FROM_LE (vprp->vert_lines);
vprp->aspect = GUINT32_FROM_LE (vprp->aspect);
vprp->width = GUINT32_FROM_LE (vprp->width);
vprp->height = GUINT32_FROM_LE (vprp->height);
vprp->fields = GUINT32_FROM_LE (vprp->fields);
#endif
/* size checking */
/* calculate fields based on size */
k = (size - G_STRUCT_OFFSET (gst_riff_vprp, field_info)) / vprp->fields;
if (vprp->fields > k) {
GST_WARNING_OBJECT (element,
"vprp header indicated %d fields, only %d available", vprp->fields, k);
vprp->fields = k;
}
if (vprp->fields > GST_RIFF_VPRP_VIDEO_FIELDS) {
GST_WARNING_OBJECT (element,
"vprp header indicated %d fields, at most %d supported", vprp->fields,
GST_RIFF_VPRP_VIDEO_FIELDS);
vprp->fields = GST_RIFF_VPRP_VIDEO_FIELDS;
}
#if (G_BYTE_ORDER == G_BIG_ENDIAN)
for (k = 0; k < vprp->fields; k++) {
gst_riff_vprp_video_field_desc *fd;
fd = &vprp->field_info[k];
fd->compressed_bm_height = GUINT32_FROM_LE (fd->compressed_bm_height);
fd->compressed_bm_width = GUINT32_FROM_LE (fd->compressed_bm_width);
fd->valid_bm_height = GUINT32_FROM_LE (fd->valid_bm_height);
fd->valid_bm_width = GUINT16_FROM_LE (fd->valid_bm_width);
fd->valid_bm_x_offset = GUINT16_FROM_LE (fd->valid_bm_x_offset);
fd->valid_bm_y_offset = GUINT32_FROM_LE (fd->valid_bm_y_offset);
fd->video_x_t_offset = GUINT32_FROM_LE (fd->video_x_t_offset);
fd->video_y_start = GUINT32_FROM_LE (fd->video_y_start);
}
#endif
/* debug */
GST_INFO_OBJECT (element, "vprp tag found in context vids:");
GST_INFO_OBJECT (element, " format_token %d", vprp->format_token);
GST_INFO_OBJECT (element, " standard %d", vprp->standard);
GST_INFO_OBJECT (element, " vert_rate %d", vprp->vert_rate);
GST_INFO_OBJECT (element, " hor_t_total %d", vprp->hor_t_total);
GST_INFO_OBJECT (element, " vert_lines %d", vprp->vert_lines);
GST_INFO_OBJECT (element, " aspect %d:%d", vprp->aspect >> 16,
vprp->aspect & 0xffff);
GST_INFO_OBJECT (element, " width %d", vprp->width);
GST_INFO_OBJECT (element, " height %d", vprp->height);
GST_INFO_OBJECT (element, " fields %d", vprp->fields);
for (k = 0; k < vprp->fields; k++) {
gst_riff_vprp_video_field_desc *fd;
fd = &(vprp->field_info[k]);
GST_INFO_OBJECT (element, " field %u description:", k);
GST_INFO_OBJECT (element, " compressed_bm_height %d",
fd->compressed_bm_height);
GST_INFO_OBJECT (element, " compressed_bm_width %d",
fd->compressed_bm_width);
GST_INFO_OBJECT (element, " valid_bm_height %d",
fd->valid_bm_height);
GST_INFO_OBJECT (element, " valid_bm_width %d", fd->valid_bm_width);
GST_INFO_OBJECT (element, " valid_bm_x_offset %d",
fd->valid_bm_x_offset);
GST_INFO_OBJECT (element, " valid_bm_y_offset %d",
fd->valid_bm_y_offset);
GST_INFO_OBJECT (element, " video_x_t_offset %d",
fd->video_x_t_offset);
GST_INFO_OBJECT (element, " video_y_start %d", fd->video_y_start);
}
gst_buffer_unref (buf);
*_vprp = vprp;
return TRUE;
/* ERRORS */
too_small:
{
GST_ERROR_OBJECT (element,
"Too small vprp (%" G_GSIZE_FORMAT " available, at least %d needed)",
size, (int) G_STRUCT_OFFSET (gst_riff_vprp, field_info));
gst_buffer_unref (buf);
return FALSE;
}
}
static void
gst_avi_demux_expose_streams (GstAviDemux * avi, gboolean force)
{
guint i;
GST_DEBUG_OBJECT (avi, "force : %d", force);
for (i = 0; i < avi->num_streams; i++) {
GstAviStream *stream = &avi->stream[i];
if (force || stream->idx_n != 0) {
GST_LOG_OBJECT (avi, "Adding pad %s", GST_PAD_NAME (stream->pad));
gst_element_add_pad ((GstElement *) avi, stream->pad);
gst_flow_combiner_add_pad (avi->flowcombiner, stream->pad);
#if 0
if (avi->element_index)
gst_index_get_writer_id (avi->element_index,
GST_OBJECT_CAST (stream->pad), &stream->index_id);
#endif
stream->exposed = TRUE;
if (avi->main_stream == -1)
avi->main_stream = i;
} else {
GST_WARNING_OBJECT (avi, "Stream #%d doesn't have any entry, removing it",
i);
gst_avi_demux_reset_stream (avi, stream);
}
}
}
/* buf contains LIST chunk data, and will be padded to even size,
* since some buggy files do not account for the padding of chunks
* within a LIST in the size of the LIST */
static inline void
gst_avi_demux_roundup_list (GstAviDemux * avi, GstBuffer ** buf)
{
gsize size;
size = gst_buffer_get_size (*buf);
if (G_UNLIKELY (size & 1)) {
GstBuffer *obuf;
GstMapInfo map;
GST_DEBUG_OBJECT (avi, "rounding up dubious list size %" G_GSIZE_FORMAT,
size);
obuf = gst_buffer_new_and_alloc (size + 1);
gst_buffer_map (obuf, &map, GST_MAP_WRITE);
gst_buffer_extract (*buf, 0, map.data, size);
/* assume 0 padding, at least makes outcome deterministic */
map.data[size] = 0;
gst_buffer_unmap (obuf, &map);
gst_buffer_replace (buf, obuf);
}
}
static GstCaps *
gst_avi_demux_check_caps (GstAviDemux * avi, GstAviStream * stream,
GstCaps * caps)
{
GstStructure *s;
const GValue *val;
GstBuffer *buf;
caps = gst_caps_make_writable (caps);
s = gst_caps_get_structure (caps, 0);
if (gst_structure_has_name (s, "video/x-raw")) {
stream->is_raw = TRUE;
stream->alignment = 32;
if (!gst_structure_has_field (s, "pixel-aspect-ratio"))
gst_structure_set (s, "pixel-aspect-ratio", GST_TYPE_FRACTION,
1, 1, NULL);
if (gst_structure_has_field_typed (s, "palette_data", GST_TYPE_BUFFER)) {
gst_structure_get (s, "palette_data", GST_TYPE_BUFFER,
&stream->rgb8_palette, NULL);
gst_structure_remove_field (s, "palette_data");
return caps;
}
} else if (!gst_structure_has_name (s, "video/x-h264")) {
return caps;
}
GST_DEBUG_OBJECT (avi, "checking caps %" GST_PTR_FORMAT, caps);
/* some muxers put invalid bytestream stuff in h264 extra data */
val = gst_structure_get_value (s, "codec_data");
if (val && (buf = gst_value_get_buffer (val))) {
guint8 *data;
gint size;
GstMapInfo map;
gst_buffer_map (buf, &map, GST_MAP_READ);
data = map.data;
size = map.size;
if (size >= 4) {
guint32 h = GST_READ_UINT32_BE (data);
gst_buffer_unmap (buf, &map);
if (h == 0x01) {
/* can hardly be valid AVC codec data */
GST_DEBUG_OBJECT (avi,
"discarding invalid codec_data containing byte-stream");
/* so do not pretend to downstream that it is packetized avc */
gst_structure_remove_field (s, "codec_data");
/* ... but rather properly parsed bytestream */
gst_structure_set (s, "stream-format", G_TYPE_STRING, "byte-stream",
"alignment", G_TYPE_STRING, "au", NULL);
}
} else {
gst_buffer_unmap (buf, &map);
}
}
return caps;
}
/*
* gst_avi_demux_parse_stream:
* @avi: calling element (used for debugging/errors).
* @buf: input buffer used to parse the stream.
*
* Parses all subchunks in a strl chunk (which defines a single
* stream). Discards the buffer after use. This function will
* increment the stream counter internally.
*
* Returns: whether the stream was identified successfully.
* Errors are not fatal. It does indicate the stream
* was skipped.
*/
static gboolean
gst_avi_demux_parse_stream (GstAviDemux * avi, GstBuffer * buf)
{
GstAviStream *stream;
GstElementClass *klass;
GstPadTemplate *templ;
GstBuffer *sub = NULL;
guint offset = 4;
guint32 tag = 0;
gchar *codec_name = NULL, *padname = NULL;
const gchar *tag_name;
GstCaps *caps = NULL;
GstPad *pad;
GstElement *element;
gboolean got_strh = FALSE, got_strf = FALSE, got_vprp = FALSE;
gst_riff_vprp *vprp = NULL;
GstEvent *event;
gchar *stream_id;
GstMapInfo map;
gboolean sparse = FALSE;
element = GST_ELEMENT_CAST (avi);
GST_DEBUG_OBJECT (avi, "Parsing stream");
gst_avi_demux_roundup_list (avi, &buf);
if (avi->num_streams >= GST_AVI_DEMUX_MAX_STREAMS) {
GST_WARNING_OBJECT (avi,
"maximum no of streams (%d) exceeded, ignoring stream",
GST_AVI_DEMUX_MAX_STREAMS);
gst_buffer_unref (buf);
/* not a fatal error, let's say */
return TRUE;
}
stream = &avi->stream[avi->num_streams];
/* initial settings */
stream->idx_duration = GST_CLOCK_TIME_NONE;
stream->hdr_duration = GST_CLOCK_TIME_NONE;
stream->duration = GST_CLOCK_TIME_NONE;
while (gst_riff_parse_chunk (element, buf, &offset, &tag, &sub)) {
/* sub can be NULL if the chunk is empty */
if (sub == NULL) {
GST_DEBUG_OBJECT (avi, "ignoring empty chunk %" GST_FOURCC_FORMAT,
GST_FOURCC_ARGS (tag));
continue;
}
switch (tag) {
case GST_RIFF_TAG_strh:
{
gst_riff_strh *strh;
if (got_strh) {
GST_WARNING_OBJECT (avi, "Ignoring additional strh chunk");
break;
}
if (!gst_riff_parse_strh (element, sub, &stream->strh)) {
/* ownership given away */
sub = NULL;
GST_WARNING_OBJECT (avi, "Failed to parse strh chunk");
goto fail;
}
sub = NULL;
strh = stream->strh;
/* sanity check; stream header frame rate matches global header
* frame duration */
if (stream->strh->type == GST_RIFF_FCC_vids) {
GstClockTime s_dur;
GstClockTime h_dur = avi->avih->us_frame * GST_USECOND;
s_dur = gst_util_uint64_scale (GST_SECOND, strh->scale, strh->rate);
GST_DEBUG_OBJECT (avi, "verifying stream framerate %d/%d, "
"frame duration = %d ms", strh->rate, strh->scale,
(gint) (s_dur / GST_MSECOND));
if (h_dur > (10 * GST_MSECOND) && (s_dur > 10 * h_dur)) {
strh->rate = GST_SECOND / GST_USECOND;
strh->scale = h_dur / GST_USECOND;
GST_DEBUG_OBJECT (avi, "correcting stream framerate to %d/%d",
strh->rate, strh->scale);
}
}
/* determine duration as indicated by header */
stream->hdr_duration = gst_util_uint64_scale ((guint64) strh->length *
strh->scale, GST_SECOND, (guint64) strh->rate);
GST_INFO ("Stream duration according to header: %" GST_TIME_FORMAT,
GST_TIME_ARGS (stream->hdr_duration));
if (stream->hdr_duration == 0)
stream->hdr_duration = GST_CLOCK_TIME_NONE;
got_strh = TRUE;
break;
}
case GST_RIFF_TAG_strf:
{
gboolean res = FALSE;
if (got_strf) {
GST_WARNING_OBJECT (avi, "Ignoring additional strf chunk");
break;
}
if (!got_strh) {
GST_ERROR_OBJECT (avi, "Found strf chunk before strh chunk");
goto fail;
}
switch (stream->strh->type) {
case GST_RIFF_FCC_vids:
stream->is_vbr = TRUE;
res = gst_riff_parse_strf_vids (element, sub,
&stream->strf.vids, &stream->extradata);
sub = NULL;
GST_DEBUG_OBJECT (element, "marking video as VBR, res %d", res);
break;
case GST_RIFF_FCC_auds:
res =
gst_riff_parse_strf_auds (element, sub, &stream->strf.auds,
&stream->extradata);
sub = NULL;
if (!res)
break;
stream->is_vbr = (stream->strh->samplesize == 0)
&& stream->strh->scale > 1
&& stream->strf.auds->blockalign != 1;
GST_DEBUG_OBJECT (element, "marking audio as VBR:%d, res %d",
stream->is_vbr, res);
/* we need these or we have no way to come up with timestamps */
if ((!stream->is_vbr && !stream->strf.auds->av_bps) ||
(stream->is_vbr && (!stream->strh->scale ||
!stream->strh->rate))) {
GST_WARNING_OBJECT (element,
"invalid audio header, ignoring stream");
goto fail;
}
/* some more sanity checks */
if (stream->is_vbr) {
if (stream->strf.auds->blockalign <= 4) {
/* that would mean (too) many frames per chunk,
* so not likely set as expected */
GST_DEBUG_OBJECT (element,
"suspicious blockalign %d for VBR audio; "
"overriding to 1 frame per chunk",
stream->strf.auds->blockalign);
/* this should top any likely value */
stream->strf.auds->blockalign = (1 << 12);
}
}
break;
case GST_RIFF_FCC_iavs:
stream->is_vbr = TRUE;
res = gst_riff_parse_strf_iavs (element, sub,
&stream->strf.iavs, &stream->extradata);
sub = NULL;
GST_DEBUG_OBJECT (element, "marking iavs as VBR, res %d", res);
break;
case GST_RIFF_FCC_txts:
/* nothing to parse here */
stream->is_vbr = (stream->strh->samplesize == 0)
&& (stream->strh->scale > 1);
res = TRUE;
break;
default:
GST_ERROR_OBJECT (avi,
"Don´t know how to handle stream type %" GST_FOURCC_FORMAT,
GST_FOURCC_ARGS (stream->strh->type));
break;
}
if (sub) {
gst_buffer_unref (sub);
sub = NULL;
}
if (!res)
goto fail;
got_strf = TRUE;
break;
}
case GST_RIFF_TAG_vprp:
{
if (got_vprp) {
GST_WARNING_OBJECT (avi, "Ignoring additional vprp chunk");
break;
}
if (!got_strh) {
GST_ERROR_OBJECT (avi, "Found vprp chunk before strh chunk");
goto fail;
}
if (!got_strf) {
GST_ERROR_OBJECT (avi, "Found vprp chunk before strf chunk");
goto fail;
}
if (!gst_avi_demux_riff_parse_vprp (element, sub, &vprp)) {
GST_WARNING_OBJECT (avi, "Failed to parse vprp chunk");
/* not considered fatal */
g_free (vprp);
vprp = NULL;
} else
got_vprp = TRUE;
sub = NULL;
break;
}
case GST_RIFF_TAG_strd:
if (stream->initdata)
gst_buffer_unref (stream->initdata);
stream->initdata = sub;
if (sub != NULL) {
gst_avi_demux_parse_strd (avi, sub);
sub = NULL;
}
break;
case GST_RIFF_TAG_strn:
g_free (stream->name);
gst_buffer_map (sub, &map, GST_MAP_READ);
if (avi->globaltags == NULL)
avi->globaltags = gst_tag_list_new_empty ();
parse_tag_value (avi, avi->globaltags, GST_TAG_TITLE,
map.data, map.size);
if (gst_tag_list_get_string (avi->globaltags, GST_TAG_TITLE,
&stream->name))
GST_DEBUG_OBJECT (avi, "stream name: %s", stream->name);
gst_buffer_unmap (sub, &map);
gst_buffer_unref (sub);
sub = NULL;
break;
case GST_RIFF_IDIT:
gst_avi_demux_parse_idit (avi, sub);
break;
default:
if (tag == GST_MAKE_FOURCC ('i', 'n', 'd', 'x') ||
tag == GST_MAKE_FOURCC ('i', 'x', '0' + avi->num_streams / 10,
'0' + avi->num_streams % 10)) {
g_free (stream->indexes);
gst_avi_demux_parse_superindex (avi, sub, &stream->indexes);
stream->superindex = TRUE;
sub = NULL;
break;
}
GST_WARNING_OBJECT (avi,
"Unknown stream header tag %" GST_FOURCC_FORMAT ", ignoring",
GST_FOURCC_ARGS (tag));
/* Only get buffer for debugging if the memdump is needed */
if (gst_debug_category_get_threshold (GST_CAT_DEFAULT) >= 9) {
GstMapInfo map;
gst_buffer_map (sub, &map, GST_MAP_READ);
GST_MEMDUMP_OBJECT (avi, "Unknown stream header tag", map.data,
map.size);
gst_buffer_unmap (sub, &map);
}
/* fall-through */
case GST_RIFF_TAG_JUNQ:
case GST_RIFF_TAG_JUNK:
break;
}
if (sub != NULL) {
gst_buffer_unref (sub);
sub = NULL;
}
}
if (!got_strh) {
GST_WARNING_OBJECT (avi, "Failed to find strh chunk");
goto fail;
}
if (!got_strf) {
GST_WARNING_OBJECT (avi, "Failed to find strf chunk");
goto fail;
}
/* get class to figure out the template */
klass = GST_ELEMENT_GET_CLASS (avi);
/* we now have all info, let´s set up a pad and a caps and be done */
/* create stream name + pad */
switch (stream->strh->type) {
case GST_RIFF_FCC_vids:{
guint32 fourcc;
fourcc = (stream->strf.vids->compression) ?
stream->strf.vids->compression : stream->strh->fcc_handler;
caps = gst_riff_create_video_caps (fourcc, stream->strh,
stream->strf.vids, stream->extradata, stream->initdata, &codec_name);
/* DXSB is XSUB, and it is placed inside a vids */
if (!caps || (fourcc != GST_MAKE_FOURCC ('D', 'X', 'S', 'B') &&
fourcc != GST_MAKE_FOURCC ('D', 'X', 'S', 'A'))) {
padname = g_strdup_printf ("video_%u", avi->num_v_streams);
templ = gst_element_class_get_pad_template (klass, "video_%u");
if (!caps) {
caps = gst_caps_new_simple ("video/x-avi-unknown", "fourcc",
G_TYPE_INT, fourcc, NULL);
} else if (got_vprp && vprp) {
guint32 aspect_n, aspect_d;
gint n, d;
aspect_n = vprp->aspect >> 16;
aspect_d = vprp->aspect & 0xffff;
/* calculate the pixel aspect ratio using w/h and aspect ratio */
n = aspect_n * stream->strf.vids->height;
d = aspect_d * stream->strf.vids->width;
if (n && d)
gst_caps_set_simple (caps, "pixel-aspect-ratio", GST_TYPE_FRACTION,
n, d, NULL);
}
caps = gst_avi_demux_check_caps (avi, stream, caps);
tag_name = GST_TAG_VIDEO_CODEC;
avi->num_v_streams++;
} else {
padname = g_strdup_printf ("subpicture_%u", avi->num_sp_streams);
templ = gst_element_class_get_pad_template (klass, "subpicture_%u");
tag_name = NULL;
avi->num_sp_streams++;
sparse = TRUE;
}
break;
}
case GST_RIFF_FCC_auds:{
/* FIXME: Do something with the channel reorder map */
padname = g_strdup_printf ("audio_%u", avi->num_a_streams);
templ = gst_element_class_get_pad_template (klass, "audio_%u");
caps = gst_riff_create_audio_caps (stream->strf.auds->format,
stream->strh, stream->strf.auds, stream->extradata,
stream->initdata, &codec_name, NULL);
if (!caps) {
caps = gst_caps_new_simple ("audio/x-avi-unknown", "codec_id",
G_TYPE_INT, stream->strf.auds->format, NULL);
}
tag_name = GST_TAG_AUDIO_CODEC;
avi->num_a_streams++;
break;
}
case GST_RIFF_FCC_iavs:{
guint32 fourcc = stream->strh->fcc_handler;
padname = g_strdup_printf ("video_%u", avi->num_v_streams);
templ = gst_element_class_get_pad_template (klass, "video_%u");
caps = gst_riff_create_iavs_caps (fourcc, stream->strh,
stream->strf.iavs, stream->extradata, stream->initdata, &codec_name);
if (!caps) {
caps = gst_caps_new_simple ("video/x-avi-unknown", "fourcc",
G_TYPE_INT, fourcc, NULL);
}
tag_name = GST_TAG_VIDEO_CODEC;
avi->num_v_streams++;
break;
}
case GST_RIFF_FCC_txts:{
padname = g_strdup_printf ("subtitle_%u", avi->num_t_streams);
templ = gst_element_class_get_pad_template (klass, "subtitle_%u");
caps = gst_caps_new_empty_simple ("application/x-subtitle-avi");
tag_name = NULL;
avi->num_t_streams++;
sparse = TRUE;
break;
}
default:
g_return_val_if_reached (FALSE);
}
/* no caps means no stream */
if (!caps) {
GST_ERROR_OBJECT (element, "Did not find caps for stream %s", padname);
goto fail;
}
GST_DEBUG_OBJECT (element, "codec-name=%s", codec_name ? codec_name : "NULL");
GST_DEBUG_OBJECT (element, "caps=%" GST_PTR_FORMAT, caps);
/* set proper settings and add it */
if (stream->pad)
gst_object_unref (stream->pad);
pad = stream->pad = gst_pad_new_from_template (templ, padname);
g_free (padname);
gst_pad_use_fixed_caps (pad);
#if 0
gst_pad_set_formats_function (pad,
GST_DEBUG_FUNCPTR (gst_avi_demux_get_src_formats));
gst_pad_set_event_mask_function (pad,
GST_DEBUG_FUNCPTR (gst_avi_demux_get_event_mask));
#endif
gst_pad_set_event_function (pad,
GST_DEBUG_FUNCPTR (gst_avi_demux_handle_src_event));
gst_pad_set_query_function (pad,
GST_DEBUG_FUNCPTR (gst_avi_demux_handle_src_query));
#if 0
gst_pad_set_convert_function (pad,
GST_DEBUG_FUNCPTR (gst_avi_demux_src_convert));
#endif
stream->num = avi->num_streams;
stream->start_entry = 0;
stream->step_entry = 0;
stream->stop_entry = 0;
stream->current_entry = -1;
stream->current_total = 0;
stream->discont = TRUE;
stream->total_bytes = 0;
stream->total_blocks = 0;
stream->n_keyframes = 0;
stream->idx_n = 0;
stream->idx_max = 0;
gst_pad_set_element_private (pad, stream);
avi->num_streams++;
gst_pad_set_active (pad, TRUE);
stream_id =
gst_pad_create_stream_id_printf (pad, GST_ELEMENT_CAST (avi), "%03u",
avi->num_streams);
event = gst_pad_get_sticky_event (avi->sinkpad, GST_EVENT_STREAM_START, 0);
if (event) {
if (gst_event_parse_group_id (event, &avi->group_id))
avi->have_group_id = TRUE;
else
avi->have_group_id = FALSE;
gst_event_unref (event);
} else if (!avi->have_group_id) {
avi->have_group_id = TRUE;
avi->group_id = gst_util_group_id_next ();
}
event = gst_event_new_stream_start (stream_id);
if (avi->have_group_id)
gst_event_set_group_id (event, avi->group_id);
if (sparse)
gst_event_set_stream_flags (event, GST_STREAM_FLAG_SPARSE);
gst_pad_push_event (pad, event);
g_free (stream_id);
gst_pad_set_caps (pad, caps);
gst_caps_unref (caps);
/* make tags */
if (codec_name && tag_name) {
if (!stream->taglist)
stream->taglist = gst_tag_list_new_empty ();
avi->got_tags = TRUE;
gst_tag_list_add (stream->taglist, GST_TAG_MERGE_APPEND, tag_name,
codec_name, NULL);
}
g_free (vprp);
g_free (codec_name);
gst_buffer_unref (buf);
return TRUE;
/* ERRORS */
fail:
{
/* unref any mem that may be in use */
if (buf)
gst_buffer_unref (buf);
if (sub)
gst_buffer_unref (sub);
g_free (vprp);
g_free (codec_name);
gst_avi_demux_reset_stream (avi, stream);
avi->num_streams++;
return FALSE;
}
}
/*
* gst_avi_demux_parse_odml:
* @avi: calling element (used for debug/error).
* @buf: input buffer to be used for parsing.
*
* Read an openDML-2.0 extension header. Fills in the frame number
* in the avi demuxer object when reading succeeds.
*/
static void
gst_avi_demux_parse_odml (GstAviDemux * avi, GstBuffer * buf)
{
guint32 tag = 0;
guint offset = 4;
GstBuffer *sub = NULL;
while (gst_riff_parse_chunk (GST_ELEMENT_CAST (avi), buf, &offset, &tag,
&sub)) {
switch (tag) {
case GST_RIFF_TAG_dmlh:{
gst_riff_dmlh dmlh, *_dmlh;
GstMapInfo map;
/* sub == NULL is possible and means an empty buffer */
if (sub == NULL)
goto next;
gst_buffer_map (sub, &map, GST_MAP_READ);
/* check size */
if (map.size < sizeof (gst_riff_dmlh)) {
GST_ERROR_OBJECT (avi,
"DMLH entry is too small (%" G_GSIZE_FORMAT " bytes, %d needed)",
map.size, (int) sizeof (gst_riff_dmlh));
gst_buffer_unmap (sub, &map);
goto next;
}
_dmlh = (gst_riff_dmlh *) map.data;
dmlh.totalframes = GST_READ_UINT32_LE (&_dmlh->totalframes);
gst_buffer_unmap (sub, &map);
GST_INFO_OBJECT (avi, "dmlh tag found: totalframes: %u",
dmlh.totalframes);
avi->avih->tot_frames = dmlh.totalframes;
goto next;
}
default:
GST_WARNING_OBJECT (avi,
"Unknown tag %" GST_FOURCC_FORMAT " in ODML header",
GST_FOURCC_ARGS (tag));
/* Only get buffer for debugging if the memdump is needed */
if (gst_debug_category_get_threshold (GST_CAT_DEFAULT) >= 9) {
GstMapInfo map;
gst_buffer_map (sub, &map, GST_MAP_READ);
GST_MEMDUMP_OBJECT (avi, "Unknown ODML tag", map.data, map.size);
gst_buffer_unmap (sub, &map);
}
/* fall-through */
case GST_RIFF_TAG_JUNQ:
case GST_RIFF_TAG_JUNK:
next:
/* skip and move to next chunk */
if (sub) {
gst_buffer_unref (sub);
sub = NULL;
}
break;
}
}
if (buf)
gst_buffer_unref (buf);
}
/* Index helper */
static guint
gst_avi_demux_index_last (GstAviDemux * avi, GstAviStream * stream)
{
return stream->idx_n;
}
/* find a previous entry in the index with the given flags */
static guint
gst_avi_demux_index_prev (GstAviDemux * avi, GstAviStream * stream,
guint last, gboolean keyframe)
{
GstAviIndexEntry *entry;
guint i;
for (i = last; i > 0; i--) {
entry = &stream->index[i - 1];
if (!keyframe || ENTRY_IS_KEYFRAME (entry)) {
return i - 1;
}
}
return 0;
}
static guint
gst_avi_demux_index_next (GstAviDemux * avi, GstAviStream * stream,
guint last, gboolean keyframe)
{
GstAviIndexEntry *entry;
gint i;
for (i = last + 1; i < stream->idx_n; i++) {
entry = &stream->index[i];
if (!keyframe || ENTRY_IS_KEYFRAME (entry)) {
return i;
}
}
return stream->idx_n - 1;
}
static guint
gst_avi_demux_index_entry_search (GstAviIndexEntry * entry, guint64 * total)
{
if (entry->total < *total)
return -1;
else if (entry->total > *total)
return 1;
return 0;
}
/*
* gst_avi_demux_index_for_time:
* @avi: Avi object
* @stream: the stream
* @time: a time position
* @next: whether to look for entry before or after @time
*
* Finds the index entry which time is less/more or equal than the requested time.
* Try to avoid binary search when we can convert the time to an index
* position directly (for example for video frames with a fixed duration).
*
* Returns: the found position in the index.
*/
static guint
gst_avi_demux_index_for_time (GstAviDemux * avi,
GstAviStream * stream, guint64 time, gboolean next)
{
guint index = -1;
guint64 total;
GST_LOG_OBJECT (avi, "search time:%" GST_TIME_FORMAT, GST_TIME_ARGS (time));
/* easy (and common) cases */
if (time == 0 || stream->idx_n == 0)
return 0;
if (time >= stream->idx_duration)
return stream->idx_n - 1;
/* figure out where we need to go. For that we convert the time to an
* index entry or we convert it to a total and then do a binary search. */
if (stream->is_vbr) {
/* VBR stream next timestamp */
if (stream->strh->type == GST_RIFF_FCC_auds) {
total = avi_stream_convert_time_to_frames_unchecked (stream, time);
} else {
index = avi_stream_convert_time_to_frames_unchecked (stream, time);
/* this entry typically undershoots the target time,
* so check a bit more if next needed */
if (next && index != -1) {
GstClockTime itime =
avi_stream_convert_frames_to_time_unchecked (stream, index);
if (itime < time && index + 1 < stream->idx_n)
index++;
}
}
} else if (stream->strh->type == GST_RIFF_FCC_auds) {
/* constant rate stream */
total = avi_stream_convert_time_to_bytes_unchecked (stream, time);
} else
return -1;
if (index == -1) {
GstAviIndexEntry *entry;
/* no index, find index with binary search on total */
GST_LOG_OBJECT (avi, "binary search for entry with total %"
G_GUINT64_FORMAT, total);
entry = gst_util_array_binary_search (stream->index,
stream->idx_n, sizeof (GstAviIndexEntry),
(GCompareDataFunc) gst_avi_demux_index_entry_search,
next ? GST_SEARCH_MODE_AFTER : GST_SEARCH_MODE_BEFORE, &total, NULL);
if (entry == NULL) {
GST_LOG_OBJECT (avi, "not found, assume index 0");
index = 0;
} else {
index = entry - stream->index;
GST_LOG_OBJECT (avi, "found at %u", index);
}
} else {
GST_LOG_OBJECT (avi, "converted time to index %u", index);
}
return index;
}
static inline GstAviStream *
gst_avi_demux_stream_for_id (GstAviDemux * avi, guint32 id)
{
guint stream_nr;
GstAviStream *stream;
/* get the stream for this entry */
stream_nr = CHUNKID_TO_STREAMNR (id);
if (G_UNLIKELY (stream_nr >= avi->num_streams)) {
GST_WARNING_OBJECT (avi,
"invalid stream nr %d (0x%08x, %" GST_FOURCC_FORMAT ")", stream_nr, id,
GST_FOURCC_ARGS (id));
return NULL;
}
stream = &avi->stream[stream_nr];
if (G_UNLIKELY (!stream->strh)) {
GST_WARNING_OBJECT (avi, "Unhandled stream %d, skipping", stream_nr);
return NULL;
}
return stream;
}
/*
* gst_avi_demux_parse_index:
* @avi: calling element (used for debugging/errors).
* @buf: buffer containing the full index.
*
* Read index entries from the provided buffer.
* The buffer should contain a GST_RIFF_TAG_idx1 chunk.
*/
static gboolean
gst_avi_demux_parse_index (GstAviDemux * avi, GstBuffer * buf)
{
GstMapInfo map;
guint i, num, n;
gst_riff_index_entry *index;
GstClockTime stamp;
GstAviStream *stream;
GstAviIndexEntry entry;
guint32 id;
if (!buf)
return FALSE;
gst_buffer_map (buf, &map, GST_MAP_READ);
stamp = gst_util_get_timestamp ();
/* see how many items in the index */
num = map.size / sizeof (gst_riff_index_entry);
if (num == 0)
goto empty_list;
GST_INFO_OBJECT (avi, "Parsing index, nr_entries = %6d", num);
index = (gst_riff_index_entry *) map.data;
/* figure out if the index is 0 based or relative to the MOVI start */
entry.offset = GST_READ_UINT32_LE (&index[0].offset);
if (entry.offset < avi->offset) {
avi->index_offset = avi->offset + 8;
GST_DEBUG ("index_offset = %" G_GUINT64_FORMAT, avi->index_offset);
} else {
avi->index_offset = 0;
GST_DEBUG ("index is 0 based");
}
for (i = 0, n = 0; i < num; i++) {
id = GST_READ_UINT32_LE (&index[i].id);
entry.offset = GST_READ_UINT32_LE (&index[i].offset);
/* some sanity checks */
if (G_UNLIKELY (id == GST_RIFF_rec || id == 0 ||
(entry.offset == 0 && n > 0)))
continue;
/* get the stream for this entry */
stream = gst_avi_demux_stream_for_id (avi, id);
if (G_UNLIKELY (!stream))
continue;
/* handle offset and size */
entry.offset += avi->index_offset + 8;
entry.size = GST_READ_UINT32_LE (&index[i].size);
/* handle flags */
if (stream->strh->type == GST_RIFF_FCC_auds) {
/* all audio frames are keyframes */
ENTRY_SET_KEYFRAME (&entry);
} else if (stream->strh->type == GST_RIFF_FCC_vids &&
stream->strf.vids->compression == GST_RIFF_DXSB) {
/* all xsub frames are keyframes */
ENTRY_SET_KEYFRAME (&entry);
} else {
guint32 flags;
/* else read flags */
flags = GST_READ_UINT32_LE (&index[i].flags);
if (flags & GST_RIFF_IF_KEYFRAME) {
ENTRY_SET_KEYFRAME (&entry);
} else {
ENTRY_UNSET_KEYFRAME (&entry);
}
}
/* and add */
if (G_UNLIKELY (!gst_avi_demux_add_index (avi, stream, num, &entry)))
goto out_of_mem;
n++;
}
gst_buffer_unmap (buf, &map);
gst_buffer_unref (buf);
/* get stream stats now */
avi->have_index = gst_avi_demux_do_index_stats (avi);
stamp = gst_util_get_timestamp () - stamp;
GST_DEBUG_OBJECT (avi, "index parsing took %" GST_TIME_FORMAT,
GST_TIME_ARGS (stamp));
return TRUE;
/* ERRORS */
empty_list:
{
GST_DEBUG_OBJECT (avi, "empty index");
gst_buffer_unmap (buf, &map);
gst_buffer_unref (buf);
return FALSE;
}
out_of_mem:
{
GST_ELEMENT_ERROR (avi, RESOURCE, NO_SPACE_LEFT, (NULL),
("Cannot allocate memory for %u*%u=%u bytes",
(guint) sizeof (GstAviIndexEntry), num,
(guint) sizeof (GstAviIndexEntry) * num));
gst_buffer_unmap (buf, &map);
gst_buffer_unref (buf);
return FALSE;
}
}
/*
* gst_avi_demux_stream_index:
* @avi: avi demuxer object.
*
* Seeks to index and reads it.
*/
static void
gst_avi_demux_stream_index (GstAviDemux * avi)
{
GstFlowReturn res;
guint64 offset = avi->offset;
GstBuffer *buf = NULL;
guint32 tag;
guint32 size;
GstMapInfo map;
GST_DEBUG ("demux stream index at offset %" G_GUINT64_FORMAT, offset);
/* get chunk information */
res = gst_pad_pull_range (avi->sinkpad, offset, 8, &buf);
if (res != GST_FLOW_OK)
goto pull_failed;
gst_buffer_map (buf, &map, GST_MAP_READ);
if (map.size < 8)
goto too_small;
/* check tag first before blindy trying to read 'size' bytes */
tag = GST_READ_UINT32_LE (map.data);
size = GST_READ_UINT32_LE (map.data + 4);
if (tag == GST_RIFF_TAG_LIST) {
/* this is the movi tag */
GST_DEBUG_OBJECT (avi, "skip LIST chunk, size %" G_GUINT32_FORMAT,
(8 + GST_ROUND_UP_2 (size)));
offset += 8 + GST_ROUND_UP_2 (size);
gst_buffer_unmap (buf, &map);
gst_buffer_unref (buf);
buf = NULL;
res = gst_pad_pull_range (avi->sinkpad, offset, 8, &buf);
if (res != GST_FLOW_OK)
goto pull_failed;
gst_buffer_map (buf, &map, GST_MAP_READ);
if (map.size < 8)
goto too_small;
tag = GST_READ_UINT32_LE (map.data);
size = GST_READ_UINT32_LE (map.data + 4);
}
gst_buffer_unmap (buf, &map);
gst_buffer_unref (buf);
if (tag != GST_RIFF_TAG_idx1)
goto no_index;
if (!size)
goto zero_index;
GST_DEBUG ("index found at offset %" G_GUINT64_FORMAT, offset);
/* read chunk, advance offset */
if (gst_riff_read_chunk (GST_ELEMENT_CAST (avi),
avi->sinkpad, &offset, &tag, &buf) != GST_FLOW_OK)
return;
GST_DEBUG ("will parse index chunk size %" G_GSIZE_FORMAT " for tag %"
GST_FOURCC_FORMAT, gst_buffer_get_size (buf), GST_FOURCC_ARGS (tag));
gst_avi_demux_parse_index (avi, buf);
#ifndef GST_DISABLE_GST_DEBUG
/* debug our indexes */
{
gint i;
GstAviStream *stream;
for (i = 0; i < avi->num_streams; i++) {
stream = &avi->stream[i];
GST_DEBUG_OBJECT (avi, "stream %u: %u frames, %" G_GINT64_FORMAT " bytes",
i, stream->idx_n, stream->total_bytes);
}
}
#endif
return;
/* ERRORS */
pull_failed:
{
GST_DEBUG_OBJECT (avi,
"pull range failed: pos=%" G_GUINT64_FORMAT " size=8", offset);
return;
}
too_small:
{
GST_DEBUG_OBJECT (avi, "Buffer is too small");
gst_buffer_unmap (buf, &map);
gst_buffer_unref (buf);
return;
}
no_index:
{
GST_WARNING_OBJECT (avi,
"No index data (idx1) after movi chunk, but %" GST_FOURCC_FORMAT,
GST_FOURCC_ARGS (tag));
return;
}
zero_index:
{
GST_WARNING_OBJECT (avi, "Empty index data (idx1) after movi chunk");
return;
}
}
/*
* gst_avi_demux_stream_index_push:
* @avi: avi demuxer object.
*
* Read index.
*/
static void
gst_avi_demux_stream_index_push (GstAviDemux * avi)
{
guint64 offset = avi->idx1_offset;
GstBuffer *buf;
guint32 tag;
guint32 size;
GST_DEBUG ("demux stream index at offset %" G_GUINT64_FORMAT, offset);
/* get chunk information */
if (!gst_avi_demux_peek_chunk (avi, &tag, &size))
return;
/* check tag first before blindly trying to read 'size' bytes */
if (tag == GST_RIFF_TAG_LIST) {
/* this is the movi tag */
GST_DEBUG_OBJECT (avi, "skip LIST chunk, size %" G_GUINT32_FORMAT,
(8 + GST_ROUND_UP_2 (size)));
avi->idx1_offset = offset + 8 + GST_ROUND_UP_2 (size);
/* issue seek to allow chain function to handle it and return! */
perform_seek_to_offset (avi, avi->idx1_offset, avi->segment_seqnum);
return;
}
if (tag != GST_RIFF_TAG_idx1)
goto no_index;
GST_DEBUG ("index found at offset %" G_GUINT64_FORMAT, offset);
/* flush chunk header */
gst_adapter_flush (avi->adapter, 8);
/* read chunk payload */
buf = gst_adapter_take_buffer (avi->adapter, size);
if (!buf)
goto pull_failed;
/* advance offset */
offset += 8 + GST_ROUND_UP_2 (size);
GST_DEBUG ("will parse index chunk size %" G_GSIZE_FORMAT " for tag %"
GST_FOURCC_FORMAT, gst_buffer_get_size (buf), GST_FOURCC_ARGS (tag));
avi->offset = avi->first_movi_offset;
gst_avi_demux_parse_index (avi, buf);
#ifndef GST_DISABLE_GST_DEBUG
/* debug our indexes */
{
gint i;
GstAviStream *stream;
for (i = 0; i < avi->num_streams; i++) {
stream = &avi->stream[i];
GST_DEBUG_OBJECT (avi, "stream %u: %u frames, %" G_GINT64_FORMAT " bytes",
i, stream->idx_n, stream->total_bytes);
}
}
#endif
return;
/* ERRORS */
pull_failed:
{
GST_DEBUG_OBJECT (avi,
"taking data from adapter failed: pos=%" G_GUINT64_FORMAT " size=%u",
offset, size);
return;
}
no_index:
{
GST_WARNING_OBJECT (avi,