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Flag DVB subtitles for the hard hearing appropriately using their component_type id.

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This is based on the component_type definition in the DVB SI spec [1].

[1]: http://www.dvb.org/technology/standards/a038_DVB-SI_dEN300468v1.12.1.pdf

Signed-off-by: Ronald S. Bultje <rsbultje@gmail.com>
(cherry picked from commit 789936dbbda60990220b80769ed75702775ea0b2)
This commit is contained in:
Hendrik Leppkes 2011-02-20 02:38:23 +01:00 committed by Michael Niedermayer
parent 70b5906315
commit a2fc93f700
1 changed files with 11 additions and 1 deletions
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12
libavformat/mpegts.c
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@ -935,7 +935,17 @@ int ff_parse_mpeg2_descriptor(AVFormatContext *fc, AVStream *st, int stream_type
language[1] = get8(pp, desc_end);
language[2] = get8(pp, desc_end);
language[3] = 0;
get8(pp, desc_end);
/* hearing impaired subtitles detection */
switch(get8(pp, desc_end)) {
case 0x20: /* DVB subtitles (for the hard of hearing) with no monitor aspect ratio criticality */
case 0x21: /* DVB subtitles (for the hard of hearing) for display on 4:3 aspect ratio monitor */
case 0x22: /* DVB subtitles (for the hard of hearing) for display on 16:9 aspect ratio monitor */
case 0x23: /* DVB subtitles (for the hard of hearing) for display on 2.21:1 aspect ratio monitor */
case 0x24: /* DVB subtitles (for the hard of hearing) for display on a high definition monitor */
case 0x25: /* DVB subtitles (for the hard of hearing) with plano-stereoscopic disparity for display on a high definition monitor */
st->disposition |= AV_DISPOSITION_HEARING_IMPAIRED;
break;
}
if (st->codec->extradata) {
if (st->codec->extradata_size == 4 && memcmp(st->codec->extradata, *pp, 4))
av_log_ask_for_sample(fc, "DVB sub with multiple IDs\n");