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ffmpeg.wasm-core
Commit 6780f488 authored by Peter Ross's avatar Peter Ross
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wtv: obtain codec information from stream2_guid chunks, if present 

Originally committed as revision 26208 to svn://svn.ffmpeg.org/ffmpeg/trunk
parent 4f18f1b0
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Showing with 42 additions and 15 deletions
libavformat/wtv.c
View file @ 6780f488
......@@ -75,6 +75,8 @@ static const ff_asf_guid data_guid =
{0x95,0xC3,0xD2,0xC2,0x7E,0x9A,0xDA,0x11,0x8B,0xF7,0x00,0x07,0xE9,0x5E,0xAD,0x8D};
static const ff_asf_guid stream_guid =
{0xED,0xA4,0x13,0x23,0x2D,0xBF,0x4F,0x45,0xAD,0x8A,0xD9,0x5B,0xA7,0xF9,0x1F,0xEE};
static const ff_asf_guid stream2_guid =
{0xA2,0xC3,0xD2,0xC2,0x7E,0x9A,0xDA,0x11,0x8B,0xF7,0x00,0x07,0xE9,0x5E,0xAD,0x8D};
static const ff_asf_guid EVENTID_SubtitleSpanningEvent =
{0x48,0xC0,0xCE,0x5D,0xB9,0xD0,0x63,0x41,0x87,0x2C,0x4F,0x32,0x22,0x3B,0xE8,0x8A};
static const ff_asf_guid EVENTID_LanguageSpanningEvent =
......@@ -192,11 +194,23 @@ static void parse_mpeg1waveformatex(AVStream *st)
}
}
static AVStream * new_stream(AVFormatContext *s, int sid, int codec_type)
/**
* Initialise stream
* @param st Stream to initialise, or NULL to create and initialise new stream
* @return NULL on error
*/
static AVStream * new_stream(AVFormatContext *s, AVStream *st, int sid, int codec_type)
{
AVStream * st = av_new_stream(s, sid);
if (!st)
return NULL;
if (st) {
if (st->codec->extradata) {
av_freep(&st->codec->extradata);
st->codec->extradata_size = 0;
}
} else {
st = av_new_stream(s, sid);
if (!st)
return NULL;
}
st->codec->codec_type = codec_type;
st->need_parsing = AVSTREAM_PARSE_FULL;
av_set_pts_info(st, 64, 1, 10000000);
......@@ -204,19 +218,19 @@ static AVStream * new_stream(AVFormatContext *s, int sid, int codec_type)
}
/**
* parse Media Type structure and create new streams as required
* parse Media Type structure and populate stream
* @param st Stream, or NULL to create new stream
* @param mediatype Mediatype GUID
* @param subtype Subtype GUID
* @param formattype Format GUID
* @param size Size of format buffer
* @return NULL on error
*/
static AVStream * parse_media_type(AVFormatContext *s, int sid,
static AVStream * parse_media_type(AVFormatContext *s, AVStream *st, int sid,
ff_asf_guid mediatype, ff_asf_guid subtype,
ff_asf_guid formattype, int size)
{
ByteIOContext *pb = s->pb;
AVStream *st;
if (!ff_guidcmp(subtype, mediasubtype_cpfilters_processed) &&
!ff_guidcmp(formattype, format_cpfilters_processed)) {
ff_asf_guid actual_subtype;
......@@ -233,11 +247,11 @@ static AVStream * parse_media_type(AVFormatContext *s, int sid,
ff_get_guid(pb, &actual_formattype);
url_fseek(pb, -size, SEEK_CUR);
st = parse_media_type(s, sid, mediatype, actual_subtype, actual_formattype, size - 32);
st = parse_media_type(s, st, sid, mediatype, actual_subtype, actual_formattype, size - 32);
url_fskip(pb, 32);
return st;
} else if (!ff_guidcmp(mediatype, mediatype_audio)) {
st = new_stream(s, sid, AVMEDIA_TYPE_AUDIO);
st = new_stream(s, st, sid, AVMEDIA_TYPE_AUDIO);
if (!st)
return NULL;
if (!ff_guidcmp(formattype, format_waveformatex)) {
......@@ -262,7 +276,7 @@ static AVStream * parse_media_type(AVFormatContext *s, int sid,
}
return st;
} else if (!ff_guidcmp(mediatype, mediatype_video)) {
st = new_stream(s, sid, AVMEDIA_TYPE_VIDEO);
st = new_stream(s, st, sid, AVMEDIA_TYPE_VIDEO);
if (!st)
return NULL;
if (!ff_guidcmp(formattype, format_videoinfo2)) {
......@@ -287,7 +301,7 @@ static AVStream * parse_media_type(AVFormatContext *s, int sid,
return st;
} else if (!ff_guidcmp(mediatype, mediatype_mpeg2_pes) &&
!ff_guidcmp(subtype, mediasubtype_dvb_subtitle)) {
st = new_stream(s, sid, AVMEDIA_TYPE_SUBTITLE);
st = new_stream(s, st, sid, AVMEDIA_TYPE_SUBTITLE);
if (!st)
return NULL;
if (ff_guidcmp(formattype, format_none))
......@@ -297,7 +311,7 @@ static AVStream * parse_media_type(AVFormatContext *s, int sid,
return st;
} else if (!ff_guidcmp(mediatype, mediatype_mstvcaption) &&
(!ff_guidcmp(subtype, mediasubtype_teletext) || !ff_guidcmp(subtype, mediasubtype_dtvccdata))) {
st = new_stream(s, sid, AVMEDIA_TYPE_SUBTITLE);
st = new_stream(s, st, sid, AVMEDIA_TYPE_SUBTITLE);
if (!st)
return NULL;
if (ff_guidcmp(formattype, format_none))
......@@ -366,10 +380,24 @@ static int parse_chunks(AVFormatContext *s, int mode, int64_t seekts, int *len_p
url_fskip(pb, 12);
ff_get_guid(pb, &formattype);
size = get_le32(pb);
parse_media_type(s, sid, mediatype, subtype, formattype, size);
parse_media_type(s, 0, sid, mediatype, subtype, formattype, size);
consumed += 72 + size;
}
}
} else if (!ff_guidcmp(g, stream2_guid)) {
int stream_index = ff_find_stream_index(s, sid);
if (stream_index >= 0) {
ff_asf_guid mediatype, subtype, formattype;
int size;
url_fskip(pb, 12);
ff_get_guid(pb, &mediatype);
ff_get_guid(pb, &subtype);
url_fskip(pb, 12);
ff_get_guid(pb, &formattype);
size = get_le32(pb);
parse_media_type(s, s->streams[stream_index], sid, mediatype, subtype, formattype, size);
consumed += 76 + size;
}
} else if (!ff_guidcmp(g, EVENTID_AudioDescriptorSpanningEvent) ||
!ff_guidcmp(g, EVENTID_CtxADescriptorSpanningEvent) ||
!ff_guidcmp(g, EVENTID_CSDescriptorSpanningEvent) ||
......@@ -457,8 +485,7 @@ static int parse_chunks(AVFormatContext *s, int mode, int64_t seekts, int *len_p
!ff_guidcmp(g, (const ff_asf_guid){0x70,0xE9,0xF1,0xF8,0x89,0xA4,0x4C,0x4D,0x83,0x73,0xB8,0x12,0xE0,0xD5,0xF8,0x1E}) ||
!ff_guidcmp(g, (const ff_asf_guid){0x96,0xC3,0xD2,0xC2,0x7E,0x9A,0xDA,0x11,0x8B,0xF7,0x00,0x07,0xE9,0x5E,0xAD,0x8D}) ||
!ff_guidcmp(g, (const ff_asf_guid){0x97,0xC3,0xD2,0xC2,0x7E,0x9A,0xDA,0x11,0x8B,0xF7,0x00,0x07,0xE9,0x5E,0xAD,0x8D}) ||
!ff_guidcmp(g, (const ff_asf_guid){0xA1,0xC3,0xD2,0xC2,0x7E,0x9A,0xDA,0x11,0x8B,0xF7,0x00,0x07,0xE9,0x5E,0xAD,0x8D}) ||
!ff_guidcmp(g, (const ff_asf_guid){0xA2,0xC3,0xD2,0xC2,0x7E,0x9A,0xDA,0x11,0x8B,0xF7,0x00,0x07,0xE9,0x5E,0xAD,0x8D})) {
!ff_guidcmp(g, (const ff_asf_guid){0xA1,0xC3,0xD2,0xC2,0x7E,0x9A,0xDA,0x11,0x8B,0xF7,0x00,0x07,0xE9,0x5E,0xAD,0x8D})) {
//ignore known guids
} else
av_log(s, AV_LOG_WARNING, "unsuported chunk:"PRI_GUID"\n", ARG_GUID(g));
......
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