RepoMirrors/mpv
1
0
Fork 0
mirror of https://github.com/mpv-player/mpv synced 2025-03-20 02:09:52 +00:00
Code Issues Releases Wiki Activity

demux_mkv: remove FourCCs from video codec handling

Browse Source 
Inherited from MPlayer times, we used FourCCs to identify video codecs.
This was later changed to libavcodec codec names (which made life a
whole lot simpler). But demux_mkv still uses FourCCs a lot.

Change this for video. It's pretty simple, because some preparation was
done in the past. We just have to replace some "internal" FourCCs with
different handling.

One potentially complicated issue is that there is no natural way to
set the sh->format (AVCodecContext.codec_tag) field anymore. Most
decoders do not need it, though mjpeg is an exception.

Note that the AVI compatibility code still requires codec mappings, but
these are provided by FFmpeg. Also, the audio code is not changed.

For the MKV_V_MPEG2 -> mpeg1video thing see next commit.
This commit is contained in:
wm4 2015-06-13 21:59:04 +02:00
parent b33ab743e5
commit fd88fb70af
2 changed files with 27 additions and 39 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
demux/codec_tags.c
View File

@ -30,13 +30,6 @@ struct mp_codec_tag {
static const struct mp_codec_tag mp_codec_tags[] = {
// Made-up tags used by demux_mkv.c to map codecs.
// (This is a leftover from MPlayer's codecs.conf mechanism.)
{MKTAG('p', 'r', '0', '0'), "prores"},
{MKTAG('H', 'E', 'V', 'C'), "hevc"},
{MKTAG('R', 'V', '2', '0'), "rv20"},
{MKTAG('R', 'V', '3', '0'), "rv30"},
{MKTAG('R', 'V', '4', '0'), "rv40"},
{MKTAG('R', 'V', '1', '0'), "rv10"},
{MKTAG('R', 'V', '1', '3'), "rv10"},
{MKTAG('E', 'A', 'C', '3'), "eac3"},
{MKTAG('M', 'P', '4', 'A'), "aac"}, // also the QT tag
{MKTAG('v', 'r', 'b', 's'), "vorbis"},
@ -51,12 +44,6 @@ static const struct mp_codec_tag mp_codec_tags[] = {
{MKTAG('d', 'n', 'e', 't'), "ac3"},
{MKTAG('s', 'i', 'p', 'r'), "sipr"},
{MKTAG('T', 'T', 'A', '1'), "tta"},
// Fringe codecs, occur in the wild, but not mapped in FFmpeg.
{MKTAG('B', 'I', 'K', 'b'), "binkvideo"},
{MKTAG('B', 'I', 'K', 'f'), "binkvideo"},
{MKTAG('B', 'I', 'K', 'g'), "binkvideo"},
{MKTAG('B', 'I', 'K', 'h'), "binkvideo"},
{MKTAG('B', 'I', 'K', 'i'), "binkvideo"},
{0}
};

53
demux/demux_mkv.c
View File

@ -1194,24 +1194,24 @@ static void display_create_tracks(demuxer_t *demuxer)
typedef struct {
char *id;
int fourcc;
const char *codec;
int extradata;
} videocodec_info_t;
static const videocodec_info_t vinfo[] = {
{MKV_V_MJPEG, MP_FOURCC('m', 'j', 'p', 'g'), 1},
{MKV_V_MPEG1, MP_FOURCC('m', 'p', 'g', '1'), 0},
{MKV_V_MPEG2, MP_FOURCC('m', 'p', 'g', '2'), 0},
{MKV_V_MPEG4_SP, MP_FOURCC('m', 'p', '4', 'v'), 1},
{MKV_V_MPEG4_ASP, MP_FOURCC('m', 'p', '4', 'v'), 1},
{MKV_V_MPEG4_AP, MP_FOURCC('m', 'p', '4', 'v'), 1},
{MKV_V_MPEG4_AVC, MP_FOURCC('a', 'v', 'c', '1'), 1},
{MKV_V_THEORA, MP_FOURCC('t', 'h', 'e', 'o'), 1},
{MKV_V_VP8, MP_FOURCC('V', 'P', '8', '0'), 0},
{MKV_V_VP9, MP_FOURCC('V', 'P', '9', '0'), 0},
{MKV_V_DIRAC, MP_FOURCC('d', 'r', 'a', 'c'), 0},
{MKV_V_PRORES, MP_FOURCC('p', 'r', '0', '0'), 0},
{MKV_V_HEVC, MP_FOURCC('H', 'E', 'V', 'C'), 1},
{MKV_V_MJPEG, "mjpeg", 1},
{MKV_V_MPEG1, "mpeg1video", 0},
{MKV_V_MPEG2, "mpeg1video", 0},
{MKV_V_MPEG4_SP, "mpeg4", 1},
{MKV_V_MPEG4_ASP, "mpeg4", 1},
{MKV_V_MPEG4_AP, "mpeg4", 1},
{MKV_V_MPEG4_AVC, "h264", 1},
{MKV_V_THEORA, "theora", 1},
{MKV_V_VP8, "vp8", 0},
{MKV_V_VP9, "vp9", 0},
{MKV_V_DIRAC, "dirac", 0},
{MKV_V_PRORES, "prores", 0},
{MKV_V_HEVC, "hevc", 1},
{0}
};
@ -1253,23 +1253,23 @@ static int demux_mkv_open_video(demuxer_t *demuxer, mkv_track_t *track)
|| !strcmp(track->codec_id, MKV_V_REALV40)))
{
unsigned char *src;
uint32_t type2;
unsigned int cnt;
src = (uint8_t *) track->private_data + RVPROPERTIES_SIZE;
cnt = track->private_size - RVPROPERTIES_SIZE;
type2 = AV_RB32(src - 4);
if (type2 == 0x10003000 || type2 == 0x10003001)
sh->format = MP_FOURCC('R', 'V', '1', '3');
else
sh->format = MP_FOURCC('R', 'V', track->codec_id[9], '0');
uint32_t t2 = AV_RB32(src - 4);
switch (t2 == 0x10003000 || t2 == 0x10003001 ? '1' : track->codec_id[9]) {
case '1': sh->codec = "rv10"; break;
case '2': sh->codec = "rv20"; break;
case '3': sh->codec = "rv30"; break;
case '4': sh->codec = "rv40"; break;
}
// copy type1 and type2 info from rv properties
extradata_size = cnt + 8;
extradata = src - 8;
track->parse = true;
track->parse_timebase = 1e3;
mp_set_codec_from_tag(sh);
} else if (strcmp(track->codec_id, MKV_V_UNCOMPRESSED) == 0) {
// raw video, "like AVI" - this is a FourCC
sh->format = track->colorspace;
@ -1291,10 +1291,8 @@ static int demux_mkv_open_video(demuxer_t *demuxer, mkv_track_t *track)
const videocodec_info_t *vi = vinfo;
while (vi->id && strcmp(vi->id, track->codec_id))
vi++;
if (vi->id) {
sh->format = vi->fourcc;
mp_set_codec_from_tag(sh);
}
if (vi->codec)
sh->codec = vi->codec;
if (vi->extradata && track->private_data && track->private_size > 0)
{
extradata = track->private_data;
@ -1302,9 +1300,12 @@ static int demux_mkv_open_video(demuxer_t *demuxer, mkv_track_t *track)
}
}
if (sh->format == MP_FOURCC('V', 'P', '9', '0')) {
const char *codec = sh->codec ? sh->codec : "";
if (!strcmp(codec, "vp9")) {
track->parse = true;
track->parse_timebase = 1e9;
} else if (!strcmp(codec, "mjpeg")) {
sh->format = MP_FOURCC('m', 'j', 'p', 'g');
}
if (extradata_size > 0x1000000) {