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rv40 pict_type parser

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git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@9544 b3059339-0415-0410-9bf9-f77b7e298cf2
This commit is contained in:
michael 2003-03-07 02:05:59 +00:00
parent fd0b2f7d6b
commit 72707c69ef
1 changed files with 19 additions and 5 deletions
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24
libmpdemux/demux_real.c
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@ -313,17 +313,31 @@ int real_check_file(demuxer_t* demuxer)
void hexdump(char *, unsigned long);
#define SKIP_BITS(n) buffer<<=n
#define SHOW_BITS(n) ((buffer)>>(32-(n)))
static float real_fix_timestamp(real_priv_t* priv, unsigned char* s, int timestamp, float frametime, unsigned int format){
float v_pts;
uint32_t buffer= (s[0]<<24) + (s[1]<<16) + (s[2]<<8) + s[3];
int kf=timestamp;
if(format==0x30335652){ // RV30 timestamps:
kf=2*(((s[1]&15)<<8)+s[2]); // 12-bit timestamp from frame header
//kf=((s[1]<<8)+s[2])>>3; // 12-bit timestamp from frame header
if(verbose>1) printf("\nTS: %08X (%04X) %02X %02X %02X %02X\n",timestamp,kf,s[0],s[1],s[2],s[3]);
int pict_type;
if(format==mmioFOURCC('R','V','3','0') || format==mmioFOURCC('R','V','4','0')){
if(format==mmioFOURCC('R','V','3','0')){
SKIP_BITS(3);
pict_type= SHOW_BITS(2);
SKIP_BITS(2 + 7);
}else{
SKIP_BITS(1);
pict_type= SHOW_BITS(2);
SKIP_BITS(2 + 7 + 1);
}
kf= 2*SHOW_BITS(12);
if(verbose>1) printf("\nTS: %08X (%04X) %d %02X %02X %02X %02X\n",timestamp,kf,pict_type,s[0],s[1],s[2],s[3]);
kf|=timestamp&(~0x1fff); // combine with packet timestamp
if(kf<timestamp-4096) kf+=8192; else // workaround wrap-around problems
if(kf>timestamp+4096) kf-=8192;
if(!(s[0]&0x8) || !(s[0]&0x10)){ // P || I frame -> swap timestamps
if(pict_type != 3){ // P || I frame -> swap timestamps
int tmp=kf;
kf=priv->kf_pts;
priv->kf_pts=tmp;