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author | Reimar Döffinger <Reimar.Doeffinger@gmx.de> | 2007-08-05 16:11:11 +0400 |
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committer | Reimar Döffinger <Reimar.Doeffinger@gmx.de> | 2007-08-05 16:11:11 +0400 |
commit | 59f6f64e30f2120122b0e082daccacd5d2e62942 (patch) | |
tree | 99ceb66946a13550d40f396c18aec7992a171783 /libavcodec/xsubdec.c | |
parent | 7e2643ae8d04ba6270b25c42f733ba5bfa76174a (diff) |
Add forgotten xsub timecode parsing
Originally committed as revision 9934 to svn://svn.ffmpeg.org/ffmpeg/trunk
Diffstat (limited to 'libavcodec/xsubdec.c')
-rw-r--r-- | libavcodec/xsubdec.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/libavcodec/xsubdec.c b/libavcodec/xsubdec.c index d85e3226de..01eb9a674b 100644 --- a/libavcodec/xsubdec.c +++ b/libavcodec/xsubdec.c @@ -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); |