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avformat/avidec: add support for recognizing HEVC fourcc when demuxing

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Some security cams generate this, as well as some versions of VirtualDub and
VLC so support for _reading_ such files is justified.

Fixes ticket #7110.

See also this discussion: https://patchwork.ffmpeg.org/patch/8744/

Signed-off-by: Marton Balint <cus@passwd.hu>
This commit is contained in:
Marton Balint 2019-08-24 01:39:33 +02:00
parent 765c56bfa9
commit 2e31774b40
3 changed files with 10 additions and 0 deletions
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3
libavformat/avidec.c
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@ -815,6 +815,9 @@ FF_ENABLE_DEPRECATION_WARNINGS
"mov tag found in avi (fourcc %s)\n",
av_fourcc2str(tag1));
}
if (!st->codecpar->codec_id)
st->codecpar->codec_id = ff_codec_get_id(ff_codec_bmp_tags_unofficial, tag1);
/* This is needed to get the pict type which is necessary
* for generating correct pts. */
st->need_parsing = AVSTREAM_PARSE_HEADERS;

5
libavformat/riff.c
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@ -492,6 +492,11 @@ const AVCodecTag ff_codec_bmp_tags[] = {
{ AV_CODEC_ID_NONE, 0 }
};
const AVCodecTag ff_codec_bmp_tags_unofficial[] = {
{ AV_CODEC_ID_HEVC, MKTAG('H', 'E', 'V', 'C') },
{ AV_CODEC_ID_NONE, 0 }
};
const AVCodecTag ff_codec_wav_tags[] = {
{ AV_CODEC_ID_PCM_S16LE, 0x0001 },
/* must come after s16le in this list */

2
libavformat/riff.h
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@ -73,6 +73,8 @@ int ff_get_wav_header(AVFormatContext *s, AVIOContext *pb, AVCodecParameters *pa
extern const AVCodecTag ff_codec_bmp_tags[]; // exposed through avformat_get_riff_video_tags()
extern const AVCodecTag ff_codec_wav_tags[];
extern const AVCodecTag ff_codec_bmp_tags_unofficial[];
void ff_parse_specific_params(AVStream *st, int *au_rate, int *au_ssize, int *au_scale);
int ff_read_riff_info(AVFormatContext *s, int64_t size);