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Partial support for QuickTime sound atom version 2.

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This doesn't add support for parsing the sound atom itself, but does
recognize the different offset at which the ESDS atom starts. Also,
this patch supports "3" in the channels field, which indicates
6-channel (5.1) audio. For more information, see this mail:

From: Corey Hickey <bugfood-ml@fatooh.org>
To: mplayer-dev-eng@mplayerhq.hu
Date: Wed, 28 Dec 2005 23:42:46 -0800
Subject: [PATCH] (partially) support QuickTime sound atom version 2


git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@17284 b3059339-0415-0410-9bf9-f77b7e298cf2
This commit is contained in:
corey 2006-01-02 06:56:22 +00:00
parent ccd1c55451
commit ffb7208370
1 changed files with 33 additions and 5 deletions
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38
libmpdemux/demux_mov.c
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@ -616,6 +616,7 @@ static void lschunks(demuxer_t* demuxer,int level,off_t endpos,mov_track_t* trak
// ([int32_t size,int32_t type,some data ],repeat)
} my_stdata;
#endif
int version, adjust;
sh_audio_t* sh=new_sh_audio(demuxer,priv->track_db);
sh->format=trak->fourcc;
@ -663,8 +664,27 @@ static void lschunks(demuxer_t* demuxer,int level,off_t endpos,mov_track_t* trak
// 36 char[] atom data (len=size-8)
// TODO: fix parsing for files using version 2.
version=char2short(trak->stdata,8);
if (version > 1)
mp_msg(MSGT_DEMUX, MSGL_WARN, "MOV: version %d sound atom may not parse correctly!\n", version);
trak->samplebytes=sh->samplesize=char2short(trak->stdata,18)/8;
trak->nchannels=sh->channels=char2short(trak->stdata,16);
/* I can't find documentation, but so far this is the case. -Corey */
switch (char2short(trak->stdata,16)) {
case 1:
trak->nchannels = 1; break;
case 2:
trak->nchannels = 2; break;
case 3:
trak->nchannels = 6; break;
default:
mp_msg(MSGT_DEMUX, MSGL_WARN,
"MOV: unable to determine audio channels, assuming 2 (got %d)\n",
char2short(trak->stdata,16));
trak->nchannels = 2;
}
sh->channels = trak->nchannels;
/*printf("MOV: timescale: %d samplerate: %d durmap: %d (%d) -> %d (%d)\n",
trak->timescale, char2short(trak->stdata,24), trak->durmap[0].dur,
trak->durmap[0].num, trak->timescale/trak->durmap[0].dur,
@ -720,10 +740,18 @@ static void lschunks(demuxer_t* demuxer,int level,off_t endpos,mov_track_t* trak
}
}
if ((trak->stdata[9] == 0 && trak->stdata_len >= 36) ||
(trak->stdata[9] == 1 && trak->stdata_len >= 36 + 48)) {
// version 0 with extra atoms
int adjust = (trak->stdata[9]==1)?48:0;
switch (version) {
case 0:
adjust = 0; break;
case 1:
adjust = 48; break;
case 2:
adjust = 68; break;
default:
mp_msg(MSGT_DEMUX, MSGL_WARN, "MOV: unknown sound atom version (%d); may not work!\n", version);
adjust = 68;
}
if (trak->stdata_len >= 36 + adjust) {
int atom_len = char2int(trak->stdata,28+adjust);
switch(char2int(trak->stdata,32+adjust)) { // atom type
case MOV_FOURCC('e','s','d','s'): {