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Code Issues Releases Activity

Add forgotten xsub timecode parsing

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Originally committed as revision 9934 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Reimar Döffinger 2007-08-05 12:11:11 +00:00
parent 7e2643ae8d
commit 59f6f64e30
1 changed files with 26 additions and 0 deletions
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26
libavcodec/xsubdec.c
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@ -7,6 +7,23 @@ static int decode_init(AVCodecContext *avctx) {
return 0;
}
static const uint8_t tc_offsets[9] = { 0, 1, 3, 4, 6, 7, 9, 10, 11 };
static const uint8_t tc_muls[9] = { 10, 6, 10, 6, 10, 6, 10, 10, 1 };
static uint64_t parse_timecode(AVCodecContext *avctx, uint8_t *buf) {
int i;
int64_t ms = 0;
if (buf[2] != ':' || buf[5] != ':' || buf[8] != '.')
return AV_NOPTS_VALUE;
for (i = 0; i < sizeof(tc_offsets); i++) {
uint8_t c = buf[tc_offsets[i]] - '0';
if (c > 9) return AV_NOPTS_VALUE;
ms = (ms + c) * tc_muls[i];
}
ms = av_rescale_q(ms, (AVRational){1, 1000}, avctx->time_base);
return ms;
}
static const uint8_t runbits[8] = { 2, 2, 6, 6, 10, 10, 14, 14 };
static int decode_frame(AVCodecContext *avctx, void *data, int *data_size,
@ -23,6 +40,15 @@ static int decode_frame(AVCodecContext *avctx, void *data, int *data_size,
return -1;
}
// read start and end time
if (buf[0] != '[' || buf[13] != '-' || buf[26] != ']') {
av_log(avctx, AV_LOG_ERROR, "invalid time code\n");
return -1;
}
sub->start_display_time = parse_timecode(avctx, buf + 1);
sub->end_display_time = parse_timecode(avctx, buf + 14);
buf += 27;
// read header
w = bytestream_get_le16(&buf);
h = bytestream_get_le16(&buf);