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add support for ASS like subtitles in Matroska 

Originally committed as revision 9593 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Aurelien Jacobs 2007-07-11 13:37:07 +00:00
parent 66fc495a10
commit 979c091056
2 changed files with 22 additions and 2 deletions
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2
libavformat/matroska.c
View File

@ -61,6 +61,8 @@ CodecTags ff_mkv_codec_tags[]={
{"S_TEXT/ASCII" , CODEC_ID_TEXT},
{"S_TEXT/UTF8" , CODEC_ID_TEXT},
{"S_TEXT/ASS" , CODEC_ID_TEXT},
{"S_TEXT/SSA" , CODEC_ID_TEXT},
{"S_VOBSUB" , CODEC_ID_DVD_SUBTITLE},
{NULL , CODEC_ID_NONE}

22
libavformat/matroskadec.c
View File

@ -95,6 +95,7 @@ typedef struct MatroskaAudioTrack {
typedef struct MatroskaSubtitleTrack {
MatroskaTrack track;
int ass;
//..
} MatroskaSubtitleTrack;
@ -2145,6 +2146,13 @@ matroska_read_header (AVFormatContext *s,
}
}
else if (codec_id == CODEC_ID_TEXT) {
MatroskaSubtitleTrack *subtrack=(MatroskaSubtitleTrack *)track;
if (!strcmp(track->codec_id, "S_TEXT/ASS") ||
!strcmp(track->codec_id, "S_TEXT/SSA"))
subtrack->ass = 1;
}
if (codec_id == CODEC_ID_NONE) {
av_log(matroska->ctx, AV_LOG_INFO,
"Unknown/unsupported CodecID %s.\n",
@ -2430,14 +2438,24 @@ matroska_parse_block(MatroskaDemuxContext *matroska, uint8_t *data, int size,
matroska_queue_packet(matroska, pkt);
}
} else {
int offset = 0;
if (st->codec->codec_id == CODEC_ID_TEXT
&& ((MatroskaSubtitleTrack *)(matroska->tracks[track]))->ass) {
int i;
for (i=0; i<8 && data[slice_offset+offset]; offset++)
if (data[slice_offset+offset] == ',')
i++;
}
pkt = av_mallocz(sizeof(AVPacket));
/* XXX: prevent data copy... */
if (av_new_packet(pkt, slice_size) < 0) {
if (av_new_packet(pkt, slice_size-offset) < 0) {
res = AVERROR_NOMEM;
n = laces-1;
break;
}
memcpy (pkt->data, data+slice_offset, slice_size);
memcpy (pkt->data, data+slice_offset+offset, slice_size-offset);
if (n == 0)
pkt->flags = is_keyframe;