diff options
Diffstat (limited to 'libavformat/mpegts.c')
| -rw-r--r-- | libavformat/mpegts.c | 37 |
1 files changed, 36 insertions, 1 deletions
diff --git a/libavformat/mpegts.c b/libavformat/mpegts.c index 0a3ad05726..bca7a7af4e 100644 --- a/libavformat/mpegts.c +++ b/libavformat/mpegts.c @@ -1840,7 +1840,9 @@ int ff_parse_mpeg2_descriptor(AVFormatContext *fc, AVStream *st, int stream_type } if (i && language[0]) { language[i - 1] = 0; - av_dict_set(&st->metadata, "language", language, 0); + /* don't overwrite language, as it may already have been set by + * another, more specific descriptor (e.g. supplementary audio) */ + av_dict_set(&st->metadata, "language", language, AV_DICT_DONT_OVERWRITE); } break; case 0x05: /* registration descriptor */ @@ -1895,6 +1897,39 @@ int ff_parse_mpeg2_descriptor(AVFormatContext *fc, AVStream *st, int stream_type st->internal->need_context_update = 1; } } + if (ext_desc_tag == 0x06) { /* supplementary audio descriptor */ + int flags; + + if (desc_len < 1) + return AVERROR_INVALIDDATA; + flags = get8(pp, desc_end); + + switch ((flags >> 2) & 0x1F) { /* editorial_classification */ + case 0x01: + st->disposition |= AV_DISPOSITION_VISUAL_IMPAIRED; + break; + case 0x02: + st->disposition |= AV_DISPOSITION_HEARING_IMPAIRED; + break; + case 0x03: + st->disposition |= AV_DISPOSITION_VISUAL_IMPAIRED; + break; + } + + if (flags & 0x01) { /* language_code_present */ + if (desc_len < 4) + return AVERROR_INVALIDDATA; + language[0] = get8(pp, desc_end); + language[1] = get8(pp, desc_end); + language[2] = get8(pp, desc_end); + language[3] = 0; + + /* This language always has to override a possible + * ISO 639 language descriptor language */ + if (language[0]) + av_dict_set(&st->metadata, "language", language, 0); + } + } break; default: break; |