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gstreamer/gst/matroska/matroska-read-common.c
Debarshi Ray 366f064e73 matroska: refactor code common to matroskademux and matroskaparse 
Move the following function to matroska-read-common.[ch] from
matroska-demux.c and matroska-parse.c:
    - gst_matroska_{demux,parse}_parse_info

https://bugzilla.gnome.org/show_bug.cgi?id=650877
2011-06-06 14:42:55 +02:00

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/* GStreamer Matroska muxer/demuxer
* (c) 2003 Ronald Bultje <rbultje@ronald.bitfreak.net>
* (c) 2006 Tim-Philipp Müller <tim centricular net>
* (c) 2008 Sebastian Dröge <slomo@circular-chaos.org>
* (c) 2011 Debarshi Ray <rishi@gnu.org>
*
* matroska-read-common.c: shared by matroska file/stream demuxer and parser
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <string.h>
#ifdef HAVE_ZLIB
#include <zlib.h>
#endif
#ifdef HAVE_BZ2
#include <bzlib.h>
#endif
#include "lzo.h"
#include "ebml-read.h"
#include "matroska-read-common.h"
GST_DEBUG_CATEGORY_STATIC (matroskareadcommon_debug);
#define GST_CAT_DEFAULT matroskareadcommon_debug
#define DEBUG_ELEMENT_START(common, ebml, element) \
GST_DEBUG_OBJECT (common, "Parsing " element " element at offset %" \
G_GUINT64_FORMAT, gst_ebml_read_get_pos (ebml))
#define DEBUG_ELEMENT_STOP(common, ebml, element, ret) \
GST_DEBUG_OBJECT (common, "Parsing " element " element " \
" finished with '%s'", gst_flow_get_name (ret))
static gboolean
gst_matroska_decompress_data (GstMatroskaTrackEncoding * enc,
guint8 ** data_out, guint * size_out,
GstMatroskaTrackCompressionAlgorithm algo)
{
guint8 *new_data = NULL;
guint new_size = 0;
guint8 *data = *data_out;
guint size = *size_out;
gboolean ret = TRUE;
if (algo == GST_MATROSKA_TRACK_COMPRESSION_ALGORITHM_ZLIB) {
#ifdef HAVE_ZLIB
/* zlib encoded data */
z_stream zstream;
guint orig_size;
int result;
orig_size = size;
zstream.zalloc = (alloc_func) 0;
zstream.zfree = (free_func) 0;
zstream.opaque = (voidpf) 0;
if (inflateInit (&zstream) != Z_OK) {
GST_WARNING ("zlib initialization failed.");
ret = FALSE;
goto out;
}
zstream.next_in = (Bytef *) data;
zstream.avail_in = orig_size;
new_size = orig_size;
new_data = g_malloc (new_size);
zstream.avail_out = new_size;
zstream.next_out = (Bytef *) new_data;
do {
result = inflate (&zstream, Z_NO_FLUSH);
if (result != Z_OK && result != Z_STREAM_END) {
GST_WARNING ("zlib decompression failed.");
g_free (new_data);
inflateEnd (&zstream);
break;
}
new_size += 4000;
new_data = g_realloc (new_data, new_size);
zstream.next_out = (Bytef *) (new_data + zstream.total_out);
zstream.avail_out += 4000;
} while (zstream.avail_in != 0 && result != Z_STREAM_END);
if (result != Z_STREAM_END) {
ret = FALSE;
goto out;
} else {
new_size = zstream.total_out;
inflateEnd (&zstream);
}
#else
GST_WARNING ("zlib encoded tracks not supported.");
ret = FALSE;
goto out;
#endif
} else if (algo == GST_MATROSKA_TRACK_COMPRESSION_ALGORITHM_BZLIB) {
#ifdef HAVE_BZ2
/* bzip2 encoded data */
bz_stream bzstream;
guint orig_size;
int result;
bzstream.bzalloc = NULL;
bzstream.bzfree = NULL;
bzstream.opaque = NULL;
orig_size = size;
if (BZ2_bzDecompressInit (&bzstream, 0, 0) != BZ_OK) {
GST_WARNING ("bzip2 initialization failed.");
ret = FALSE;
goto out;
}
bzstream.next_in = (char *) data;
bzstream.avail_in = orig_size;
new_size = orig_size;
new_data = g_malloc (new_size);
bzstream.avail_out = new_size;
bzstream.next_out = (char *) new_data;
do {
result = BZ2_bzDecompress (&bzstream);
if (result != BZ_OK && result != BZ_STREAM_END) {
GST_WARNING ("bzip2 decompression failed.");
g_free (new_data);
BZ2_bzDecompressEnd (&bzstream);
break;
}
new_size += 4000;
new_data = g_realloc (new_data, new_size);
bzstream.next_out = (char *) (new_data + bzstream.total_out_lo32);
bzstream.avail_out += 4000;
} while (bzstream.avail_in != 0 && result != BZ_STREAM_END);
if (result != BZ_STREAM_END) {
ret = FALSE;
goto out;
} else {
new_size = bzstream.total_out_lo32;
BZ2_bzDecompressEnd (&bzstream);
}
#else
GST_WARNING ("bzip2 encoded tracks not supported.");
ret = FALSE;
goto out;
#endif
} else if (algo == GST_MATROSKA_TRACK_COMPRESSION_ALGORITHM_LZO1X) {
/* lzo encoded data */
int result;
int orig_size, out_size;
orig_size = size;
out_size = size;
new_size = size;
new_data = g_malloc (new_size);
do {
orig_size = size;
out_size = new_size;
result = lzo1x_decode (new_data, &out_size, data, &orig_size);
if (orig_size > 0) {
new_size += 4000;
new_data = g_realloc (new_data, new_size);
}
} while (orig_size > 0 && result == LZO_OUTPUT_FULL);
new_size -= out_size;
if (result != LZO_OUTPUT_FULL) {
GST_WARNING ("lzo decompression failed");
g_free (new_data);
ret = FALSE;
goto out;
}
} else if (algo == GST_MATROSKA_TRACK_COMPRESSION_ALGORITHM_HEADERSTRIP) {
/* header stripped encoded data */
if (enc->comp_settings_length > 0) {
new_data = g_malloc (size + enc->comp_settings_length);
new_size = size + enc->comp_settings_length;
memcpy (new_data, enc->comp_settings, enc->comp_settings_length);
memcpy (new_data + enc->comp_settings_length, data, size);
}
} else {
GST_ERROR ("invalid compression algorithm %d", algo);
ret = FALSE;
}
out:
if (!ret) {
*data_out = NULL;
*size_out = 0;
} else {
*data_out = new_data;
*size_out = new_size;
}
return ret;
}
GstFlowReturn
gst_matroska_decode_content_encodings (GArray * encodings)
{
gint i;
if (encodings == NULL)
return GST_FLOW_OK;
for (i = 0; i < encodings->len; i++) {
GstMatroskaTrackEncoding *enc =
&g_array_index (encodings, GstMatroskaTrackEncoding, i);
guint8 *data = NULL;
guint size;
if ((enc->scope & GST_MATROSKA_TRACK_ENCODING_SCOPE_NEXT_CONTENT_ENCODING)
== 0)
continue;
/* Encryption not supported yet */
if (enc->type != 0)
return GST_FLOW_ERROR;
if (i + 1 >= encodings->len)
return GST_FLOW_ERROR;
if (enc->comp_settings_length == 0)
continue;
data = enc->comp_settings;
size = enc->comp_settings_length;
if (!gst_matroska_decompress_data (enc, &data, &size, enc->comp_algo))
return GST_FLOW_ERROR;
g_free (enc->comp_settings);
enc->comp_settings = data;
enc->comp_settings_length = size;
}
return GST_FLOW_OK;
}
gboolean
gst_matroska_decode_data (GArray * encodings, guint8 ** data_out,
guint * size_out, GstMatroskaTrackEncodingScope scope, gboolean free)
{
guint8 *data;
guint size;
gboolean ret = TRUE;
gint i;
g_return_val_if_fail (encodings != NULL, FALSE);
g_return_val_if_fail (data_out != NULL && *data_out != NULL, FALSE);
g_return_val_if_fail (size_out != NULL, FALSE);
data = *data_out;
size = *size_out;
for (i = 0; i < encodings->len; i++) {
GstMatroskaTrackEncoding *enc =
&g_array_index (encodings, GstMatroskaTrackEncoding, i);
guint8 *new_data = NULL;
guint new_size = 0;
if ((enc->scope & scope) == 0)
continue;
/* Encryption not supported yet */
if (enc->type != 0) {
ret = FALSE;
break;
}
new_data = data;
new_size = size;
ret =
gst_matroska_decompress_data (enc, &new_data, &new_size,
enc->comp_algo);
if (!ret)
break;
if ((data == *data_out && free) || (data != *data_out))
g_free (data);
data = new_data;
size = new_size;
}
if (!ret) {
if ((data == *data_out && free) || (data != *data_out))
g_free (data);
*data_out = NULL;
*size_out = 0;
} else {
*data_out = data;
*size_out = size;
}
return ret;
}
static gint
gst_matroska_index_compare (GstMatroskaIndex * i1, GstMatroskaIndex * i2)
{
if (i1->time < i2->time)
return -1;
else if (i1->time > i2->time)
return 1;
else if (i1->block < i2->block)
return -1;
else if (i1->block > i2->block)
return 1;
else
return 0;
}
gint
gst_matroska_index_seek_find (GstMatroskaIndex * i1, GstClockTime * time,
gpointer user_data)
{
if (i1->time < *time)
return -1;
else if (i1->time > *time)
return 1;
else
return 0;
}
GstMatroskaIndex *
gst_matroska_read_common_do_index_seek (GstMatroskaReadCommon * common,
GstMatroskaTrackContext * track, gint64 seek_pos, GArray ** _index,
gint * _entry_index)
{
GstMatroskaIndex *entry = NULL;
GArray *index;
if (!common->index || !common->index->len)
return NULL;
/* find entry just before or at the requested position */
if (track && track->index_table)
index = track->index_table;
else
index = common->index;
entry =
gst_util_array_binary_search (index->data, index->len,
sizeof (GstMatroskaIndex),
(GCompareDataFunc) gst_matroska_index_seek_find, GST_SEARCH_MODE_BEFORE,
&seek_pos, NULL);
if (entry == NULL)
entry = &g_array_index (index, GstMatroskaIndex, 0);
if (_index)
*_index = index;
if (_entry_index)
*_entry_index = entry - (GstMatroskaIndex *) index->data;
return entry;
}
static gint
gst_matroska_read_common_encoding_cmp (GstMatroskaTrackEncoding * a,
GstMatroskaTrackEncoding * b)
{
if (b->order > a->order)
return 1;
else if (b->order < a->order)
return -1;
else
return 0;
}
static gboolean
gst_matroska_read_common_encoding_order_unique (GArray * encodings, guint64
order)
{
gint i;
if (encodings == NULL || encodings->len == 0)
return TRUE;
for (i = 0; i < encodings->len; i++)
if (g_array_index (encodings, GstMatroskaTrackEncoding, i).order == order)
return FALSE;
return TRUE;
}
/* takes ownership of taglist */
void
gst_matroska_read_common_found_global_tag (GstMatroskaReadCommon * common,
GstElement * el, GstTagList * taglist)
{
if (common->global_tags) {
/* nothing sent yet, add to cache */
gst_tag_list_insert (common->global_tags, taglist, GST_TAG_MERGE_APPEND);
gst_tag_list_free (taglist);
} else {
/* hm, already sent, no need to cache and wait anymore */
GST_DEBUG_OBJECT (common, "Sending late global tags %" GST_PTR_FORMAT,
taglist);
gst_element_found_tags (el, taglist);
}
}
gint64
gst_matroska_read_common_get_length (GstMatroskaReadCommon * common)
{
GstFormat fmt = GST_FORMAT_BYTES;
gint64 end = -1;
if (!gst_pad_query_peer_duration (common->sinkpad, &fmt, &end) ||
fmt != GST_FORMAT_BYTES || end < 0)
GST_DEBUG_OBJECT (common, "no upstream length");
return end;
}
/* determine track to seek in */
GstMatroskaTrackContext *
gst_matroska_read_common_get_seek_track (GstMatroskaReadCommon * common,
GstMatroskaTrackContext * track)
{
gint i;
if (track && track->type == GST_MATROSKA_TRACK_TYPE_VIDEO)
return track;
for (i = 0; i < common->src->len; i++) {
GstMatroskaTrackContext *stream;
stream = g_ptr_array_index (common->src, i);
if (stream->type == GST_MATROSKA_TRACK_TYPE_VIDEO && stream->index_table)
track = stream;
}
return track;
}
/* skip unknown or alike element */
GstFlowReturn
gst_matroska_read_common_parse_skip (GstMatroskaReadCommon * common,
GstEbmlRead * ebml, const gchar * parent_name, guint id)
{
if (id == GST_EBML_ID_VOID) {
GST_DEBUG_OBJECT (common, "Skipping EBML Void element");
} else if (id == GST_EBML_ID_CRC32) {
GST_DEBUG_OBJECT (common, "Skipping EBML CRC32 element");
} else {
GST_WARNING_OBJECT (common,
"Unknown %s subelement 0x%x - ignoring", parent_name, id);
}
return gst_ebml_read_skip (ebml);
}
GstFlowReturn
gst_matroska_read_common_parse_header (GstMatroskaReadCommon * common,
GstEbmlRead * ebml)
{
GstFlowReturn ret;
gchar *doctype;
guint version;
guint32 id;
/* this function is the first to be called */
/* default init */
doctype = NULL;
version = 1;
ret = gst_ebml_peek_id (ebml, &id);
if (ret != GST_FLOW_OK)
return ret;
GST_DEBUG_OBJECT (common, "id: %08x", id);
if (id != GST_EBML_ID_HEADER) {
GST_ERROR_OBJECT (common, "Failed to read header");
goto exit;
}
ret = gst_ebml_read_master (ebml, &id);
if (ret != GST_FLOW_OK)
return ret;
while (gst_ebml_read_has_remaining (ebml, 1, TRUE)) {
ret = gst_ebml_peek_id (ebml, &id);
if (ret != GST_FLOW_OK)
return ret;
switch (id) {
/* is our read version uptodate? */
case GST_EBML_ID_EBMLREADVERSION:{
guint64 num;
ret = gst_ebml_read_uint (ebml, &id, &num);
if (ret != GST_FLOW_OK)
return ret;
if (num != GST_EBML_VERSION) {
GST_ERROR_OBJECT (ebml, "Unsupported EBML version %" G_GUINT64_FORMAT,
num);
return GST_FLOW_ERROR;
}
GST_DEBUG_OBJECT (ebml, "EbmlReadVersion: %" G_GUINT64_FORMAT, num);
break;
}
/* we only handle 8 byte lengths at max */
case GST_EBML_ID_EBMLMAXSIZELENGTH:{
guint64 num;
ret = gst_ebml_read_uint (ebml, &id, &num);
if (ret != GST_FLOW_OK)
return ret;
if (num > sizeof (guint64)) {
GST_ERROR_OBJECT (ebml,
"Unsupported EBML maximum size %" G_GUINT64_FORMAT, num);
return GST_FLOW_ERROR;
}
GST_DEBUG_OBJECT (ebml, "EbmlMaxSizeLength: %" G_GUINT64_FORMAT, num);
break;
}
/* we handle 4 byte IDs at max */
case GST_EBML_ID_EBMLMAXIDLENGTH:{
guint64 num;
ret = gst_ebml_read_uint (ebml, &id, &num);
if (ret != GST_FLOW_OK)
return ret;
if (num > sizeof (guint32)) {
GST_ERROR_OBJECT (ebml,
"Unsupported EBML maximum ID %" G_GUINT64_FORMAT, num);
return GST_FLOW_ERROR;
}
GST_DEBUG_OBJECT (ebml, "EbmlMaxIdLength: %" G_GUINT64_FORMAT, num);
break;
}
case GST_EBML_ID_DOCTYPE:{
gchar *text;
ret = gst_ebml_read_ascii (ebml, &id, &text);
if (ret != GST_FLOW_OK)
return ret;
GST_DEBUG_OBJECT (ebml, "EbmlDocType: %s", GST_STR_NULL (text));
if (doctype)
g_free (doctype);
doctype = text;
break;
}
case GST_EBML_ID_DOCTYPEREADVERSION:{
guint64 num;
ret = gst_ebml_read_uint (ebml, &id, &num);
if (ret != GST_FLOW_OK)
return ret;
version = num;
GST_DEBUG_OBJECT (ebml, "EbmlReadVersion: %" G_GUINT64_FORMAT, num);
break;
}
default:
ret = gst_matroska_read_common_parse_skip (common, ebml,
"EBML header", id);
if (ret != GST_FLOW_OK)
return ret;
break;
/* we ignore these two, as they don't tell us anything we care about */
case GST_EBML_ID_EBMLVERSION:
case GST_EBML_ID_DOCTYPEVERSION:
ret = gst_ebml_read_skip (ebml);
if (ret != GST_FLOW_OK)
return ret;
break;
}
}
exit:
if ((doctype != NULL && !strcmp (doctype, GST_MATROSKA_DOCTYPE_MATROSKA)) ||
(doctype != NULL && !strcmp (doctype, GST_MATROSKA_DOCTYPE_WEBM)) ||
(doctype == NULL)) {
if (version <= 2) {
if (doctype) {
GST_INFO_OBJECT (common, "Input is %s version %d", doctype, version);
} else {
GST_WARNING_OBJECT (common, "Input is EBML without doctype, assuming "
"matroska (version %d)", version);
}
ret = GST_FLOW_OK;
} else {
GST_ELEMENT_ERROR (common, STREAM, DEMUX, (NULL),
("Demuxer version (2) is too old to read %s version %d",
GST_STR_NULL (doctype), version));
ret = GST_FLOW_ERROR;
}
g_free (doctype);
} else {
GST_ELEMENT_ERROR (common, STREAM, WRONG_TYPE, (NULL),
("Input is not a matroska stream (doctype=%s)", doctype));
ret = GST_FLOW_ERROR;
g_free (doctype);
}
return ret;
}
static GstFlowReturn
gst_matroska_read_common_parse_index_cuetrack (GstMatroskaReadCommon * common,
GstEbmlRead * ebml, guint * nentries)
{
guint32 id;
GstFlowReturn ret;
GstMatroskaIndex idx;
idx.pos = (guint64) - 1;
idx.track = 0;
idx.time = GST_CLOCK_TIME_NONE;
idx.block = 1;
DEBUG_ELEMENT_START (common, ebml, "CueTrackPositions");
if ((ret = gst_ebml_read_master (ebml, &id)) != GST_FLOW_OK) {
DEBUG_ELEMENT_STOP (common, ebml, "CueTrackPositions", ret);
return ret;
}
while (ret == GST_FLOW_OK && gst_ebml_read_has_remaining (ebml, 1, TRUE)) {
if ((ret = gst_ebml_peek_id (ebml, &id)) != GST_FLOW_OK)
break;
switch (id) {
/* track number */
case GST_MATROSKA_ID_CUETRACK:
{
guint64 num;
if ((ret = gst_ebml_read_uint (ebml, &id, &num)) != GST_FLOW_OK)
break;
if (num == 0) {
idx.track = 0;
GST_WARNING_OBJECT (common, "Invalid CueTrack 0");
break;
}
GST_DEBUG_OBJECT (common, "CueTrack: %" G_GUINT64_FORMAT, num);
idx.track = num;
break;
}
/* position in file */
case GST_MATROSKA_ID_CUECLUSTERPOSITION:
{
guint64 num;
if ((ret = gst_ebml_read_uint (ebml, &id, &num)) != GST_FLOW_OK)
break;
if (num > G_MAXINT64) {
GST_WARNING_OBJECT (common, "CueClusterPosition %" G_GUINT64_FORMAT
" too large", num);
break;
}
idx.pos = num;
break;
}
/* number of block in the cluster */
case GST_MATROSKA_ID_CUEBLOCKNUMBER:
{
guint64 num;
if ((ret = gst_ebml_read_uint (ebml, &id, &num)) != GST_FLOW_OK)
break;
if (num == 0) {
GST_WARNING_OBJECT (common, "Invalid CueBlockNumber 0");
break;
}
GST_DEBUG_OBJECT (common, "CueBlockNumber: %" G_GUINT64_FORMAT, num);
idx.block = num;
/* mild sanity check, disregard strange cases ... */
if (idx.block > G_MAXUINT16) {
GST_DEBUG_OBJECT (common, "... looks suspicious, ignoring");
idx.block = 1;
}
break;
}
default:
ret = gst_matroska_read_common_parse_skip (common, ebml,
"CueTrackPositions", id);
break;
case GST_MATROSKA_ID_CUECODECSTATE:
case GST_MATROSKA_ID_CUEREFERENCE:
ret = gst_ebml_read_skip (ebml);
break;
}
}
DEBUG_ELEMENT_STOP (common, ebml, "CueTrackPositions", ret);
if ((ret == GST_FLOW_OK || ret == GST_FLOW_UNEXPECTED)
&& idx.pos != (guint64) - 1 && idx.track > 0) {
g_array_append_val (common->index, idx);
(*nentries)++;
} else if (ret == GST_FLOW_OK || ret == GST_FLOW_UNEXPECTED) {
GST_DEBUG_OBJECT (common, "CueTrackPositions without valid content");
}
return ret;
}
static GstFlowReturn
gst_matroska_read_common_parse_index_pointentry (GstMatroskaReadCommon *
common, GstEbmlRead * ebml)
{
guint32 id;
GstFlowReturn ret;
GstClockTime time = GST_CLOCK_TIME_NONE;
guint nentries = 0;
DEBUG_ELEMENT_START (common, ebml, "CuePoint");
if ((ret = gst_ebml_read_master (ebml, &id)) != GST_FLOW_OK) {
DEBUG_ELEMENT_STOP (common, ebml, "CuePoint", ret);
return ret;
}
while (ret == GST_FLOW_OK && gst_ebml_read_has_remaining (ebml, 1, TRUE)) {
if ((ret = gst_ebml_peek_id (ebml, &id)) != GST_FLOW_OK)
break;
switch (id) {
/* one single index entry ('point') */
case GST_MATROSKA_ID_CUETIME:
{
if ((ret = gst_ebml_read_uint (ebml, &id, &time)) != GST_FLOW_OK)
break;
GST_DEBUG_OBJECT (common, "CueTime: %" G_GUINT64_FORMAT, time);
time = time * common->time_scale;
break;
}
/* position in the file + track to which it belongs */
case GST_MATROSKA_ID_CUETRACKPOSITIONS:
{
if ((ret =
gst_matroska_read_common_parse_index_cuetrack (common, ebml,
&nentries)) != GST_FLOW_OK)
break;
break;
}
default:
ret = gst_matroska_read_common_parse_skip (common, ebml, "CuePoint",
id);
break;
}
}
DEBUG_ELEMENT_STOP (common, ebml, "CuePoint", ret);
if (nentries > 0) {
if (time == GST_CLOCK_TIME_NONE) {
GST_WARNING_OBJECT (common, "CuePoint without valid time");
g_array_remove_range (common->index, common->index->len - nentries,
nentries);
} else {
gint i;
for (i = common->index->len - nentries; i < common->index->len; i++) {
GstMatroskaIndex *idx =
&g_array_index (common->index, GstMatroskaIndex, i);
idx->time = time;
GST_DEBUG_OBJECT (common, "Index entry: pos=%" G_GUINT64_FORMAT
", time=%" GST_TIME_FORMAT ", track=%u, block=%u", idx->pos,
GST_TIME_ARGS (idx->time), (guint) idx->track, (guint) idx->block);
}
}
} else {
GST_DEBUG_OBJECT (common, "Empty CuePoint");
}
return ret;
}
gint
gst_matroska_read_common_stream_from_num (GstMatroskaReadCommon * common,
guint track_num)
{
guint n;
g_assert (common->src->len == common->num_streams);
for (n = 0; n < common->src->len; n++) {
GstMatroskaTrackContext *context = g_ptr_array_index (common->src, n);
if (context->num == track_num) {
return n;
}
}
if (n == common->num_streams)
GST_WARNING_OBJECT (common,
"Failed to find corresponding pad for tracknum %d", track_num);
return -1;
}
GstFlowReturn
gst_matroska_read_common_parse_index (GstMatroskaReadCommon * common,
GstEbmlRead * ebml)
{
guint32 id;
GstFlowReturn ret = GST_FLOW_OK;
guint i;
if (common->index)
g_array_free (common->index, TRUE);
common->index =
g_array_sized_new (FALSE, FALSE, sizeof (GstMatroskaIndex), 128);
DEBUG_ELEMENT_START (common, ebml, "Cues");
if ((ret = gst_ebml_read_master (ebml, &id)) != GST_FLOW_OK) {
DEBUG_ELEMENT_STOP (common, ebml, "Cues", ret);
return ret;
}
while (ret == GST_FLOW_OK && gst_ebml_read_has_remaining (ebml, 1, TRUE)) {
if ((ret = gst_ebml_peek_id (ebml, &id)) != GST_FLOW_OK)
break;
switch (id) {
/* one single index entry ('point') */
case GST_MATROSKA_ID_POINTENTRY:
ret = gst_matroska_read_common_parse_index_pointentry (common, ebml);
break;
default:
ret = gst_matroska_read_common_parse_skip (common, ebml, "Cues", id);
break;
}
}
DEBUG_ELEMENT_STOP (common, ebml, "Cues", ret);
/* Sort index by time, smallest time first, for easier searching */
g_array_sort (common->index, (GCompareFunc) gst_matroska_index_compare);
/* Now sort the track specific index entries into their own arrays */
for (i = 0; i < common->index->len; i++) {
GstMatroskaIndex *idx = &g_array_index (common->index, GstMatroskaIndex,
i);
gint track_num;
GstMatroskaTrackContext *ctx;
if (common->element_index) {
gint writer_id;
if (idx->track != 0 &&
(track_num =
gst_matroska_read_common_stream_from_num (common,
idx->track)) != -1) {
ctx = g_ptr_array_index (common->src, track_num);
if (ctx->index_writer_id == -1)
gst_index_get_writer_id (common->element_index,
GST_OBJECT (ctx->pad), &ctx->index_writer_id);
writer_id = ctx->index_writer_id;
} else {
if (common->element_index_writer_id == -1)
gst_index_get_writer_id (common->element_index, GST_OBJECT (common),
&common->element_index_writer_id);
writer_id = common->element_index_writer_id;
}
GST_LOG_OBJECT (common, "adding association %" GST_TIME_FORMAT "-> %"
G_GUINT64_FORMAT " for writer id %d", GST_TIME_ARGS (idx->time),
idx->pos, writer_id);
gst_index_add_association (common->element_index, writer_id,
GST_ASSOCIATION_FLAG_KEY_UNIT, GST_FORMAT_TIME, idx->time,
GST_FORMAT_BYTES, idx->pos + common->ebml_segment_start, NULL);
}
if (idx->track == 0)
continue;
track_num = gst_matroska_read_common_stream_from_num (common, idx->track);
if (track_num == -1)
continue;
ctx = g_ptr_array_index (common->src, track_num);
if (ctx->index_table == NULL)
ctx->index_table =
g_array_sized_new (FALSE, FALSE, sizeof (GstMatroskaIndex), 128);
g_array_append_vals (ctx->index_table, idx, 1);
}
common->index_parsed = TRUE;
/* sanity check; empty index normalizes to no index */
if (common->index->len == 0) {
g_array_free (common->index, TRUE);
common->index = NULL;
}
return ret;
}
GstFlowReturn
gst_matroska_read_common_parse_info (GstMatroskaReadCommon * common,
GstElement * el, GstEbmlRead * ebml)
{
GstFlowReturn ret = GST_FLOW_OK;
gdouble dur_f = -1.0;
guint32 id;
DEBUG_ELEMENT_START (common, ebml, "SegmentInfo");
if ((ret = gst_ebml_read_master (ebml, &id)) != GST_FLOW_OK) {
DEBUG_ELEMENT_STOP (common, ebml, "SegmentInfo", ret);
return ret;
}
while (ret == GST_FLOW_OK && gst_ebml_read_has_remaining (ebml, 1, TRUE)) {
if ((ret = gst_ebml_peek_id (ebml, &id)) != GST_FLOW_OK)
break;
switch (id) {
/* cluster timecode */
case GST_MATROSKA_ID_TIMECODESCALE:{
guint64 num;
if ((ret = gst_ebml_read_uint (ebml, &id, &num)) != GST_FLOW_OK)
break;
GST_DEBUG_OBJECT (common, "TimeCodeScale: %" G_GUINT64_FORMAT, num);
common->time_scale = num;
break;
}
case GST_MATROSKA_ID_DURATION:{
if ((ret = gst_ebml_read_float (ebml, &id, &dur_f)) != GST_FLOW_OK)
break;
if (dur_f <= 0.0) {
GST_WARNING_OBJECT (common, "Invalid duration %lf", dur_f);
break;
}
GST_DEBUG_OBJECT (common, "Duration: %lf", dur_f);
break;
}
case GST_MATROSKA_ID_WRITINGAPP:{
gchar *text;
if ((ret = gst_ebml_read_utf8 (ebml, &id, &text)) != GST_FLOW_OK)
break;
GST_DEBUG_OBJECT (common, "WritingApp: %s", GST_STR_NULL (text));
common->writing_app = text;
break;
}
case GST_MATROSKA_ID_MUXINGAPP:{
gchar *text;
if ((ret = gst_ebml_read_utf8 (ebml, &id, &text)) != GST_FLOW_OK)
break;
GST_DEBUG_OBJECT (common, "MuxingApp: %s", GST_STR_NULL (text));
common->muxing_app = text;
break;
}
case GST_MATROSKA_ID_DATEUTC:{
gint64 time;
if ((ret = gst_ebml_read_date (ebml, &id, &time)) != GST_FLOW_OK)
break;
GST_DEBUG_OBJECT (common, "DateUTC: %" G_GINT64_FORMAT, time);
common->created = time;
break;
}
case GST_MATROSKA_ID_TITLE:{
gchar *text;
GstTagList *taglist;
if ((ret = gst_ebml_read_utf8 (ebml, &id, &text)) != GST_FLOW_OK)
break;
GST_DEBUG_OBJECT (common, "Title: %s", GST_STR_NULL (text));
taglist = gst_tag_list_new ();
gst_tag_list_add (taglist, GST_TAG_MERGE_APPEND, GST_TAG_TITLE, text,
NULL);
gst_matroska_read_common_found_global_tag (common, el, taglist);
g_free (text);
break;
}
default:
ret = gst_matroska_read_common_parse_skip (common, ebml,
"SegmentInfo", id);
break;
/* fall through */
case GST_MATROSKA_ID_SEGMENTUID:
case GST_MATROSKA_ID_SEGMENTFILENAME:
case GST_MATROSKA_ID_PREVUID:
case GST_MATROSKA_ID_PREVFILENAME:
case GST_MATROSKA_ID_NEXTUID:
case GST_MATROSKA_ID_NEXTFILENAME:
case GST_MATROSKA_ID_SEGMENTFAMILY:
case GST_MATROSKA_ID_CHAPTERTRANSLATE:
ret = gst_ebml_read_skip (ebml);
break;
}
}
if (dur_f > 0.0) {
GstClockTime dur_u;
dur_u = gst_gdouble_to_guint64 (dur_f *
gst_guint64_to_gdouble (common->time_scale));
if (GST_CLOCK_TIME_IS_VALID (dur_u) && dur_u <= G_MAXINT64)
gst_segment_set_duration (&common->segment, GST_FORMAT_TIME, dur_u);
}
DEBUG_ELEMENT_STOP (common, ebml, "SegmentInfo", ret);
common->segmentinfo_parsed = TRUE;
return ret;
}
static GstFlowReturn
gst_matroska_read_common_parse_metadata_id_simple_tag (GstMatroskaReadCommon *
common, GstEbmlRead * ebml, GstTagList ** p_taglist)
{
/* FIXME: check if there are more useful mappings */
static const struct
{
const gchar *matroska_tagname;
const gchar *gstreamer_tagname;
}
tag_conv[] = {
{
GST_MATROSKA_TAG_ID_TITLE, GST_TAG_TITLE}, {
GST_MATROSKA_TAG_ID_ARTIST, GST_TAG_ARTIST}, {
GST_MATROSKA_TAG_ID_AUTHOR, GST_TAG_ARTIST}, {
GST_MATROSKA_TAG_ID_ALBUM, GST_TAG_ALBUM}, {
GST_MATROSKA_TAG_ID_COMMENTS, GST_TAG_COMMENT}, {
GST_MATROSKA_TAG_ID_BITSPS, GST_TAG_BITRATE}, {
GST_MATROSKA_TAG_ID_BPS, GST_TAG_BITRATE}, {
GST_MATROSKA_TAG_ID_ENCODER, GST_TAG_ENCODER}, {
GST_MATROSKA_TAG_ID_DATE, GST_TAG_DATE}, {
GST_MATROSKA_TAG_ID_ISRC, GST_TAG_ISRC}, {
GST_MATROSKA_TAG_ID_COPYRIGHT, GST_TAG_COPYRIGHT}, {
GST_MATROSKA_TAG_ID_BPM, GST_TAG_BEATS_PER_MINUTE}, {
GST_MATROSKA_TAG_ID_TERMS_OF_USE, GST_TAG_LICENSE}, {
GST_MATROSKA_TAG_ID_COMPOSER, GST_TAG_COMPOSER}, {
GST_MATROSKA_TAG_ID_LEAD_PERFORMER, GST_TAG_PERFORMER}, {
GST_MATROSKA_TAG_ID_GENRE, GST_TAG_GENRE}
};
GstFlowReturn ret;
guint32 id;
gchar *value = NULL;
gchar *tag = NULL;
DEBUG_ELEMENT_START (common, ebml, "SimpleTag");
if ((ret = gst_ebml_read_master (ebml, &id)) != GST_FLOW_OK) {
DEBUG_ELEMENT_STOP (common, ebml, "SimpleTag", ret);
return ret;
}
while (ret == GST_FLOW_OK && gst_ebml_read_has_remaining (ebml, 1, TRUE)) {
/* read all sub-entries */
if ((ret = gst_ebml_peek_id (ebml, &id)) != GST_FLOW_OK)
break;
switch (id) {
case GST_MATROSKA_ID_TAGNAME:
g_free (tag);
tag = NULL;
ret = gst_ebml_read_ascii (ebml, &id, &tag);
GST_DEBUG_OBJECT (common, "TagName: %s", GST_STR_NULL (tag));
break;
case GST_MATROSKA_ID_TAGSTRING:
g_free (value);
value = NULL;
ret = gst_ebml_read_utf8 (ebml, &id, &value);
GST_DEBUG_OBJECT (common, "TagString: %s", GST_STR_NULL (value));
break;
default:
ret = gst_matroska_read_common_parse_skip (common, ebml, "SimpleTag",
id);
break;
/* fall-through */
case GST_MATROSKA_ID_TAGLANGUAGE:
case GST_MATROSKA_ID_TAGDEFAULT:
case GST_MATROSKA_ID_TAGBINARY:
ret = gst_ebml_read_skip (ebml);
break;
}
}
DEBUG_ELEMENT_STOP (common, ebml, "SimpleTag", ret);
if (tag && value) {
guint i;
for (i = 0; i < G_N_ELEMENTS (tag_conv); i++) {
const gchar *tagname_gst = tag_conv[i].gstreamer_tagname;
const gchar *tagname_mkv = tag_conv[i].matroska_tagname;
if (strcmp (tagname_mkv, tag) == 0) {
GValue dest = { 0, };
GType dest_type = gst_tag_get_type (tagname_gst);
/* Ensure that any date string is complete */
if (dest_type == GST_TYPE_DATE) {
guint year = 1901, month = 1, day = 1;
/* Dates can be yyyy-MM-dd, yyyy-MM or yyyy, but we need
* the first type */
if (sscanf (value, "%04u-%02u-%02u", &year, &month, &day) != 0) {
g_free (value);
value = g_strdup_printf ("%04u-%02u-%02u", year, month, day);
}
}
g_value_init (&dest, dest_type);
if (gst_value_deserialize (&dest, value)) {
gst_tag_list_add_values (*p_taglist, GST_TAG_MERGE_APPEND,
tagname_gst, &dest, NULL);
} else {
GST_WARNING_OBJECT (common, "Can't transform tag '%s' with "
"value '%s' to target type '%s'", tag, value,
g_type_name (dest_type));
}
g_value_unset (&dest);
break;
}
}
}
g_free (tag);
g_free (value);
return ret;
}
static GstFlowReturn
gst_matroska_read_common_parse_metadata_id_tag (GstMatroskaReadCommon * common,
GstEbmlRead * ebml, GstTagList ** p_taglist)
{
guint32 id;
GstFlowReturn ret;
DEBUG_ELEMENT_START (common, ebml, "Tag");
if ((ret = gst_ebml_read_master (ebml, &id)) != GST_FLOW_OK) {
DEBUG_ELEMENT_STOP (common, ebml, "Tag", ret);
return ret;
}
while (ret == GST_FLOW_OK && gst_ebml_read_has_remaining (ebml, 1, TRUE)) {
/* read all sub-entries */
if ((ret = gst_ebml_peek_id (ebml, &id)) != GST_FLOW_OK)
break;
switch (id) {
case GST_MATROSKA_ID_SIMPLETAG:
ret = gst_matroska_read_common_parse_metadata_id_simple_tag (common,
ebml, p_taglist);
break;
default:
ret = gst_matroska_read_common_parse_skip (common, ebml, "Tag", id);
break;
}
}
DEBUG_ELEMENT_STOP (common, ebml, "Tag", ret);
return ret;
}
GstFlowReturn
gst_matroska_read_common_parse_metadata (GstMatroskaReadCommon * common,
GstElement * el, GstEbmlRead * ebml)
{
GstTagList *taglist;
GstFlowReturn ret = GST_FLOW_OK;
guint32 id;
GList *l;
guint64 curpos;
curpos = gst_ebml_read_get_pos (ebml);
/* Make sure we don't parse a tags element twice and
* post it's tags twice */
curpos = gst_ebml_read_get_pos (ebml);
for (l = common->tags_parsed; l; l = l->next) {
guint64 *pos = l->data;
if (*pos == curpos) {
GST_DEBUG_OBJECT (common, "Skipping already parsed Tags at offset %"
G_GUINT64_FORMAT, curpos);
return GST_FLOW_OK;
}
}
common->tags_parsed =
g_list_prepend (common->tags_parsed, g_slice_new (guint64));
*((guint64 *) common->tags_parsed->data) = curpos;
/* fall-through */
if ((ret = gst_ebml_read_master (ebml, &id)) != GST_FLOW_OK) {
DEBUG_ELEMENT_STOP (common, ebml, "Tags", ret);
return ret;
}
taglist = gst_tag_list_new ();
while (ret == GST_FLOW_OK && gst_ebml_read_has_remaining (ebml, 1, TRUE)) {
if ((ret = gst_ebml_peek_id (ebml, &id)) != GST_FLOW_OK)
break;
switch (id) {
case GST_MATROSKA_ID_TAG:
ret = gst_matroska_read_common_parse_metadata_id_tag (common, ebml,
&taglist);
break;
default:
ret = gst_matroska_read_common_parse_skip (common, ebml, "Tags", id);
break;
/* FIXME: Use to limit the tags to specific pads */
case GST_MATROSKA_ID_TARGETS:
ret = gst_ebml_read_skip (ebml);
break;
}
}
DEBUG_ELEMENT_STOP (common, ebml, "Tags", ret);
gst_matroska_read_common_found_global_tag (common, el, taglist);
return ret;
}
static const guint8 *
gst_matroska_read_common_peek_adapter (GstMatroskaReadCommon * common, guint
peek)
{
return gst_adapter_peek (common->adapter, peek);
}
/*
* Calls pull_range for (offset,size) without advancing our offset
*/
GstFlowReturn
gst_matroska_read_common_peek_bytes (GstMatroskaReadCommon * common, guint64
offset, guint size, GstBuffer ** p_buf, guint8 ** bytes)
{
GstFlowReturn ret;
/* Caching here actually makes much less difference than one would expect.
* We do it mainly to avoid pulling buffers of 1 byte all the time */
if (common->cached_buffer) {
guint64 cache_offset = GST_BUFFER_OFFSET (common->cached_buffer);
guint cache_size = GST_BUFFER_SIZE (common->cached_buffer);
if (cache_offset <= common->offset &&
(common->offset + size) <= (cache_offset + cache_size)) {
if (p_buf)
*p_buf = gst_buffer_create_sub (common->cached_buffer,
common->offset - cache_offset, size);
if (bytes)
*bytes = GST_BUFFER_DATA (common->cached_buffer) + common->offset -
cache_offset;
return GST_FLOW_OK;
}
/* not enough data in the cache, free cache and get a new one */
gst_buffer_unref (common->cached_buffer);
common->cached_buffer = NULL;
}
/* refill the cache */
ret = gst_pad_pull_range (common->sinkpad, common->offset,
MAX (size, 64 * 1024), &common->cached_buffer);
if (ret != GST_FLOW_OK) {
common->cached_buffer = NULL;
return ret;
}
if (GST_BUFFER_SIZE (common->cached_buffer) >= size) {
if (p_buf)
*p_buf = gst_buffer_create_sub (common->cached_buffer, 0, size);
if (bytes)
*bytes = GST_BUFFER_DATA (common->cached_buffer);
return GST_FLOW_OK;
}
/* Not possible to get enough data, try a last time with
* requesting exactly the size we need */
gst_buffer_unref (common->cached_buffer);
common->cached_buffer = NULL;
ret =
gst_pad_pull_range (common->sinkpad, common->offset, size,
&common->cached_buffer);
if (ret != GST_FLOW_OK) {
GST_DEBUG_OBJECT (common, "pull_range returned %d", ret);
if (p_buf)
*p_buf = NULL;
if (bytes)
*bytes = NULL;
return ret;
}
if (GST_BUFFER_SIZE (common->cached_buffer) < size) {
GST_WARNING_OBJECT (common, "Dropping short buffer at offset %"
G_GUINT64_FORMAT ": wanted %u bytes, got %u bytes", common->offset,
size, GST_BUFFER_SIZE (common->cached_buffer));
gst_buffer_unref (common->cached_buffer);
common->cached_buffer = NULL;
if (p_buf)
*p_buf = NULL;
if (bytes)
*bytes = NULL;
return GST_FLOW_UNEXPECTED;
}
if (p_buf)
*p_buf = gst_buffer_create_sub (common->cached_buffer, 0, size);
if (bytes)
*bytes = GST_BUFFER_DATA (common->cached_buffer);
return GST_FLOW_OK;
}
static const guint8 *
gst_matroska_read_common_peek_pull (GstMatroskaReadCommon * common, guint peek)
{
guint8 *data = NULL;
gst_matroska_read_common_peek_bytes (common, common->offset, peek, NULL,
&data);
return data;
}
GstFlowReturn
gst_matroska_read_common_peek_id_length_pull (GstMatroskaReadCommon * common,
GstElement * el, guint32 * _id, guint64 * _length, guint * _needed)
{
return gst_ebml_peek_id_length (_id, _length, _needed,
(GstPeekData) gst_matroska_read_common_peek_pull, (gpointer) common, el,
common->offset);
}
GstFlowReturn
gst_matroska_read_common_peek_id_length_push (GstMatroskaReadCommon * common,
GstElement * el, guint32 * _id, guint64 * _length, guint * _needed)
{
return gst_ebml_peek_id_length (_id, _length, _needed,
(GstPeekData) gst_matroska_read_common_peek_adapter, (gpointer) common,
el, common->offset);
}
static GstFlowReturn
gst_matroska_read_common_read_track_encoding (GstMatroskaReadCommon * common,
GstEbmlRead * ebml, GstMatroskaTrackContext * context)
{
GstMatroskaTrackEncoding enc = { 0, };
GstFlowReturn ret;
guint32 id;
DEBUG_ELEMENT_START (common, ebml, "ContentEncoding");
/* Set default values */
enc.scope = 1;
/* All other default values are 0 */
if ((ret = gst_ebml_read_master (ebml, &id)) != GST_FLOW_OK) {
DEBUG_ELEMENT_STOP (common, ebml, "ContentEncoding", ret);
return ret;
}
while (ret == GST_FLOW_OK && gst_ebml_read_has_remaining (ebml, 1, TRUE)) {
if ((ret = gst_ebml_peek_id (ebml, &id)) != GST_FLOW_OK)
break;
switch (id) {
case GST_MATROSKA_ID_CONTENTENCODINGORDER:{
guint64 num;
if ((ret = gst_ebml_read_uint (ebml, &id, &num)) != GST_FLOW_OK)
break;
if (!gst_matroska_read_common_encoding_order_unique (context->encodings,
num)) {
GST_ERROR_OBJECT (common, "ContentEncodingOrder %" G_GUINT64_FORMAT
"is not unique for track %d", num, context->num);
ret = GST_FLOW_ERROR;
break;
}
GST_DEBUG_OBJECT (common, "ContentEncodingOrder: %" G_GUINT64_FORMAT,
num);
enc.order = num;
break;
}
case GST_MATROSKA_ID_CONTENTENCODINGSCOPE:{
guint64 num;
if ((ret = gst_ebml_read_uint (ebml, &id, &num)) != GST_FLOW_OK)
break;
if (num > 7 && num == 0) {
GST_ERROR_OBJECT (common, "Invalid ContentEncodingScope %"
G_GUINT64_FORMAT, num);
ret = GST_FLOW_ERROR;
break;
}
GST_DEBUG_OBJECT (common, "ContentEncodingScope: %" G_GUINT64_FORMAT,
num);
enc.scope = num;
break;
}
case GST_MATROSKA_ID_CONTENTENCODINGTYPE:{
guint64 num;
if ((ret = gst_ebml_read_uint (ebml, &id, &num)) != GST_FLOW_OK)
break;
if (num > 1) {
GST_ERROR_OBJECT (common, "Invalid ContentEncodingType %"
G_GUINT64_FORMAT, num);
ret = GST_FLOW_ERROR;
break;
} else if (num != 0) {
GST_ERROR_OBJECT (common, "Encrypted tracks are not supported yet");
ret = GST_FLOW_ERROR;
break;
}
GST_DEBUG_OBJECT (common, "ContentEncodingType: %" G_GUINT64_FORMAT,
num);
enc.type = num;
break;
}
case GST_MATROSKA_ID_CONTENTCOMPRESSION:{
DEBUG_ELEMENT_START (common, ebml, "ContentCompression");
if ((ret = gst_ebml_read_master (ebml, &id)) != GST_FLOW_OK)
break;
while (ret == GST_FLOW_OK &&
gst_ebml_read_has_remaining (ebml, 1, TRUE)) {
if ((ret = gst_ebml_peek_id (ebml, &id)) != GST_FLOW_OK)
break;
switch (id) {
case GST_MATROSKA_ID_CONTENTCOMPALGO:{
guint64 num;
if ((ret = gst_ebml_read_uint (ebml, &id, &num)) != GST_FLOW_OK) {
break;
}
if (num > 3) {
GST_ERROR_OBJECT (common, "Invalid ContentCompAlgo %"
G_GUINT64_FORMAT, num);
ret = GST_FLOW_ERROR;
break;
}
GST_DEBUG_OBJECT (common, "ContentCompAlgo: %" G_GUINT64_FORMAT,
num);
enc.comp_algo = num;
break;
}
case GST_MATROSKA_ID_CONTENTCOMPSETTINGS:{
guint8 *data;
guint64 size;
if ((ret =
gst_ebml_read_binary (ebml, &id, &data,
&size)) != GST_FLOW_OK) {
break;
}
enc.comp_settings = data;
enc.comp_settings_length = size;
GST_DEBUG_OBJECT (common,
"ContentCompSettings of size %" G_GUINT64_FORMAT, size);
break;
}
default:
GST_WARNING_OBJECT (common,
"Unknown ContentCompression subelement 0x%x - ignoring", id);
ret = gst_ebml_read_skip (ebml);
break;
}
}
DEBUG_ELEMENT_STOP (common, ebml, "ContentCompression", ret);
break;
}
case GST_MATROSKA_ID_CONTENTENCRYPTION:
GST_ERROR_OBJECT (common, "Encrypted tracks not yet supported");
gst_ebml_read_skip (ebml);
ret = GST_FLOW_ERROR;
break;
default:
GST_WARNING_OBJECT (common,
"Unknown ContentEncoding subelement 0x%x - ignoring", id);
ret = gst_ebml_read_skip (ebml);
break;
}
}
DEBUG_ELEMENT_STOP (common, ebml, "ContentEncoding", ret);
if (ret != GST_FLOW_OK && ret != GST_FLOW_UNEXPECTED)
return ret;
/* TODO: Check if the combination of values is valid */
g_array_append_val (context->encodings, enc);
return ret;
}
GstFlowReturn
gst_matroska_read_common_read_track_encodings (GstMatroskaReadCommon * common,
GstEbmlRead * ebml, GstMatroskaTrackContext * context)
{
GstFlowReturn ret;
guint32 id;
DEBUG_ELEMENT_START (common, ebml, "ContentEncodings");
if ((ret = gst_ebml_read_master (ebml, &id)) != GST_FLOW_OK) {
DEBUG_ELEMENT_STOP (common, ebml, "ContentEncodings", ret);
return ret;
}
context->encodings =
g_array_sized_new (FALSE, FALSE, sizeof (GstMatroskaTrackEncoding), 1);
while (ret == GST_FLOW_OK && gst_ebml_read_has_remaining (ebml, 1, TRUE)) {
if ((ret = gst_ebml_peek_id (ebml, &id)) != GST_FLOW_OK)
break;
switch (id) {
case GST_MATROSKA_ID_CONTENTENCODING:
ret = gst_matroska_read_common_read_track_encoding (common, ebml,
context);
break;
default:
GST_WARNING_OBJECT (common,
"Unknown ContentEncodings subelement 0x%x - ignoring", id);
ret = gst_ebml_read_skip (ebml);
break;
}
}
DEBUG_ELEMENT_STOP (common, ebml, "ContentEncodings", ret);
if (ret != GST_FLOW_OK && ret != GST_FLOW_UNEXPECTED)
return ret;
/* Sort encodings according to their order */
g_array_sort (context->encodings,
(GCompareFunc) gst_matroska_read_common_encoding_cmp);
return gst_matroska_decode_content_encodings (context->encodings);
}
/* call with object lock held */
void
gst_matroska_read_common_reset_streams (GstMatroskaReadCommon * common,
GstClockTime time, gboolean full)
{
gint i;
GST_DEBUG_OBJECT (common, "resetting stream state");
g_assert (common->src->len == common->num_streams);
for (i = 0; i < common->src->len; i++) {
GstMatroskaTrackContext *context = g_ptr_array_index (common->src, i);
context->pos = time;
context->set_discont = TRUE;
context->eos = FALSE;
context->from_time = GST_CLOCK_TIME_NONE;
if (full)
context->last_flow = GST_FLOW_OK;
if (context->type == GST_MATROSKA_TRACK_TYPE_VIDEO) {
GstMatroskaTrackVideoContext *videocontext =
(GstMatroskaTrackVideoContext *) context;
/* demux object lock held by caller */
videocontext->earliest_time = GST_CLOCK_TIME_NONE;
}
}
}
gboolean
gst_matroska_read_common_tracknumber_unique (GstMatroskaReadCommon * common,
guint64 num)
{
gint i;
g_assert (common->src->len == common->num_streams);
for (i = 0; i < common->src->len; i++) {
GstMatroskaTrackContext *context = g_ptr_array_index (common->src, i);
if (context->num == num)
return FALSE;
}
return TRUE;
}
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