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demux_avi: modify to avoid -aid problem in svn

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[ Note: the questionable changes in svn that triggered this problem
were never included in git, and so this commit is not strictly
necessary here. It's included to reduce the differences between git
and svn demux_avi versions. ]

Fix possible division by 0 if -aid is used for AVI files.

git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@32622 b3059339-0415-0410-9bf9-f77b7e298cf2
This commit is contained in:
reimar 2010-11-13 10:17:13 +00:00 committed by Uoti Urpala
parent c96f83c235
commit 74377fbfbf
1 changed files with 29 additions and 22 deletions
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51
libmpdemux/demux_avi.c
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@ -38,6 +38,32 @@ extern const demuxer_desc_t demuxer_desc_avi_nini;
// PTS: 0=interleaved 1=BPS-based
int pts_from_bps=1;
static void update_audio_block_size(demuxer_t *demux)
{
avi_priv_t *priv = demux->priv;
sh_audio_t *sh = demux->audio->sh;
if (!sh)
return;
priv->audio_block_size = sh->audio.dwSampleSize;
if (sh->wf) {
priv->audio_block_size = sh->wf->nBlockAlign;
if (!priv->audio_block_size) {
// for PCM audio we can calculate the blocksize:
if (sh->format == 1)
priv->audio_block_size = sh->wf->nChannels*(sh->wf->wBitsPerSample/8);
else
priv->audio_block_size = 1; // hope the best...
} else {
// workaround old mencoder bug:
if (sh->audio.dwSampleSize == 1 && sh->audio.dwScale == 1 &&
(sh->wf->nBlockAlign == 1152 || sh->wf->nBlockAlign == 576)) {
mp_tmsg(MSGT_DEMUX,MSGL_WARN,"AVI: Working around CBR-MP3 nBlockAlign header bug!\n");
priv->audio_block_size = 1;
}
}
}
}
// Select ds from ID
static demux_stream_t *demux_avi_select_stream(demuxer_t *demux,
unsigned int id)
@ -55,29 +81,9 @@ static demux_stream_t *demux_avi_select_stream(demuxer_t *demux,
if(stream_id==demux->audio->id){
if(!demux->audio->sh){
sh_audio_t* sh;
avi_priv_t *priv=demux->priv;
sh=demux->audio->sh=demux->a_streams[stream_id];
demux->audio->sh=demux->a_streams[stream_id];
mp_msg(MSGT_DEMUX,MSGL_V,"Auto-selected AVI audio ID = %d\n",demux->audio->id);
if(sh->wf){
priv->audio_block_size=sh->wf->nBlockAlign;
if(!priv->audio_block_size){
// for PCM audio we can calculate the blocksize:
if(sh->format==1)
priv->audio_block_size=sh->wf->nChannels*(sh->wf->wBitsPerSample/8);
else
priv->audio_block_size=1; // hope the best...
} else {
// workaround old mencoder's bug:
if(sh->audio.dwSampleSize==1 && sh->audio.dwScale==1 &&
(sh->wf->nBlockAlign==1152 || sh->wf->nBlockAlign==576)){
mp_tmsg(MSGT_DEMUX,MSGL_WARN,"AVI: Working around CBR-MP3 nBlockAlign header bug!\n");
priv->audio_block_size=1;
}
}
} else {
priv->audio_block_size=sh->audio.dwSampleSize;
}
update_audio_block_size(demux);
}
return demux->audio;
}
@ -441,6 +447,7 @@ static demuxer_t* demux_open_avi(demuxer_t* demuxer){
//---- AVI header:
read_avi_header(demuxer,(demuxer->stream->flags & MP_STREAM_SEEK_BW)?index_mode:-2);
update_audio_block_size(demuxer);
if(demuxer->audio->id>=0 && !demuxer->a_streams[demuxer->audio->id]){
mp_tmsg(MSGT_DEMUX,MSGL_WARN,"AVI: invalid audio stream ID: %d - ignoring (nosound)\n",demuxer->audio->id);