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correcter mpeg4 headers

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Originally committed as revision 1376 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer 2002-12-30 00:28:42 +00:00
parent 3cef52271d
commit 41773b735e
5 changed files with 139 additions and 17 deletions
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6
libavcodec/avcodec.h
View File

@ -826,8 +826,10 @@ typedef struct AVCodecContext {
#define FF_DEBUG_MB_TYPE 8
#define FF_DEBUG_QP 16
#define FF_DEBUG_MV 32
#define FF_DEBUG_VIS_MV 64
#define FF_DEBUG_SKIP 128
#define FF_DEBUG_VIS_MV 0x00000040
#define FF_DEBUG_SKIP 0x00000080
#define FF_DEBUG_STARTCODE 0x00000100
#define FF_DEBUG_PTS 0x00000200
/**
* error

137
libavcodec/h263.c
View File

@ -1564,21 +1564,77 @@ void ff_set_mpeg4_time(MpegEncContext * s, int picture_number){
}
}
static void mpeg4_encode_vol_header(MpegEncContext * s)
static void mpeg4_encode_gop_header(MpegEncContext * s){
int hours, minutes, seconds;
put_bits(&s->pb, 16, 0);
put_bits(&s->pb, 16, GOP_STARTCODE);
seconds= s->time/s->time_increment_resolution;
minutes= seconds/60; seconds %= 60;
hours= minutes/60; minutes %= 60;
hours%=24;
put_bits(&s->pb, 5, hours);
put_bits(&s->pb, 6, minutes);
put_bits(&s->pb, 1, 1);
put_bits(&s->pb, 6, seconds);
put_bits(&s->pb, 1, 0); //closed gov == NO
put_bits(&s->pb, 1, 0); //broken link == NO
ff_mpeg4_stuffing(&s->pb);
}
static void mpeg4_encode_visual_object_header(MpegEncContext * s){
int profile_and_level_indication;
int vo_ver_id;
if(s->max_b_frames || s->quarter_sample){
profile_and_level_indication= 0xF1; // adv simple level 1
vo_ver_id= 5;
}else{
profile_and_level_indication= 0x01; // simple level 1
vo_ver_id= 1;
}
//FIXME levels
put_bits(&s->pb, 16, 0);
put_bits(&s->pb, 16, VOS_STARTCODE);
put_bits(&s->pb, 8, profile_and_level_indication);
put_bits(&s->pb, 16, 0);
put_bits(&s->pb, 16, VISUAL_OBJ_STARTCODE);
put_bits(&s->pb, 1, 1);
put_bits(&s->pb, 4, vo_ver_id);
put_bits(&s->pb, 3, 1); //priority
put_bits(&s->pb, 4, 1); //visual obj type== video obj
put_bits(&s->pb, 1, 0); //video signal type == no clue //FIXME
ff_mpeg4_stuffing(&s->pb);
}
static void mpeg4_encode_vol_header(MpegEncContext * s, int vo_number, int vol_number)
{
int vo_ver_id=2; //must be 2 if we want GMC or q-pel
int vo_ver_id;
char buf[255];
if(s->max_b_frames){
if(s->max_b_frames || s->quarter_sample){
vo_ver_id= 5;
s->vo_type= ADV_SIMPLE_VO_TYPE;
}else{
vo_ver_id= 1;
s->vo_type= SIMPLE_VO_TYPE;
}
put_bits(&s->pb, 16, 0);
put_bits(&s->pb, 16, 0x100); /* video obj */
put_bits(&s->pb, 16, 0x100 + vo_number); /* video obj */
put_bits(&s->pb, 16, 0);
put_bits(&s->pb, 16, 0x120); /* video obj layer */
put_bits(&s->pb, 16, 0x120 + vol_number); /* video obj layer */
put_bits(&s->pb, 1, 0); /* random access vol */
put_bits(&s->pb, 8, s->vo_type); /* video obj type indication */
@ -1621,7 +1677,7 @@ static void mpeg4_encode_vol_header(MpegEncContext * s)
put_bits(&s->pb, 1, 1); /* obmc disable */
if (vo_ver_id == 1) {
put_bits(&s->pb, 1, s->vol_sprite_usage=0); /* sprite enable */
}else{ /* vo_ver_id == 2 */
}else{
put_bits(&s->pb, 2, s->vol_sprite_usage=0); /* sprite enable */
}
@ -1665,8 +1721,13 @@ void mpeg4_encode_picture_header(MpegEncContext * s, int picture_number)
int time_div, time_mod;
if(s->pict_type==I_TYPE){
if(picture_number==0 || !s->strict_std_compliance)
mpeg4_encode_vol_header(s);
if(picture_number - s->last_vo_picture_number >= 300 || picture_number==0){
mpeg4_encode_visual_object_header(s);
mpeg4_encode_vol_header(s, 0, 0);
s->last_vo_picture_number= picture_number;
}
mpeg4_encode_gop_header(s);
}
s->partitioned_frame= s->data_partitioning && s->pict_type!=B_TYPE;
@ -1674,7 +1735,7 @@ void mpeg4_encode_picture_header(MpegEncContext * s, int picture_number)
//printf("num:%d rate:%d base:%d\n", s->picture_number, s->frame_rate, FRAME_RATE_BASE);
put_bits(&s->pb, 16, 0); /* vop header */
put_bits(&s->pb, 16, 0x1B6); /* vop header */
put_bits(&s->pb, 16, VOP_STARTCODE); /* vop header */
put_bits(&s->pb, 2, s->pict_type - 1); /* pict type: I = 0 , P = 1 */
time_div= s->time/s->time_increment_resolution;
@ -4147,6 +4208,22 @@ printf("offset: %d:%d , delta: %d %d %d %d, shift %d\n",
#endif
}
static int mpeg4_decode_gop_header(MpegEncContext * s, GetBitContext *gb){
int hours, minutes, seconds;
hours= get_bits(gb, 5);
minutes= get_bits(gb, 6);
skip_bits1(gb);
seconds= get_bits(gb, 6);
s->time_base= seconds + 60*(minutes + 60*hours);
skip_bits1(gb);
skip_bits1(gb);
return 0;
}
static int decode_vol_header(MpegEncContext *s, GetBitContext *gb){
int width, height, vo_ver_id;
@ -4504,6 +4581,8 @@ static int decode_vop_header(MpegEncContext *s, GetBitContext *gb){
}
s->current_picture.pts= s->time*1000LL*1000LL / s->time_increment_resolution;
if(s->avctx->debug&FF_DEBUG_PTS)
printf("MPEG4 PTS: %f\n", s->current_picture.pts/(1000.0*1000.0));
if(check_marker(gb, "before vop_coded")==0 && s->picture_number==0){
printf("hmm, seems the headers arnt complete, trying to guess time_increment_bits\n");
@ -4668,17 +4747,51 @@ int ff_mpeg4_decode_picture_header(MpegEncContext * s, GetBitContext *gb)
if((startcode&0xFFFFFF00) != 0x100)
continue; //no startcode
if(s->avctx->debug&FF_DEBUG_STARTCODE){
printf("startcode: %3X ", startcode);
if (startcode<=0x11F) printf("Video Object Start");
else if(startcode<=0x12F) printf("Video Object Layer Start");
else if(startcode<=0x13F) printf("Reserved");
else if(startcode<=0x15F) printf("FGS bp start");
else if(startcode<=0x1AF) printf("Reserved");
else if(startcode==0x1B0) printf("Visual Object Seq Start");
else if(startcode==0x1B1) printf("Visual Object Seq End");
else if(startcode==0x1B2) printf("User Data");
else if(startcode==0x1B3) printf("Group of VOP start");
else if(startcode==0x1B4) printf("Video Session Error");
else if(startcode==0x1B5) printf("Visual Object Start");
else if(startcode==0x1B6) printf("Video Object Plane start");
else if(startcode==0x1B7) printf("slice start");
else if(startcode==0x1B8) printf("extension start");
else if(startcode==0x1B9) printf("fgs start");
else if(startcode==0x1BA) printf("FBA Object start");
else if(startcode==0x1BB) printf("FBA Object Plane start");
else if(startcode==0x1BC) printf("Mesh Object start");
else if(startcode==0x1BD) printf("Mesh Object Plane start");
else if(startcode==0x1BE) printf("Still Textutre Object start");
else if(startcode==0x1BF) printf("Textutre Spatial Layer start");
else if(startcode==0x1C0) printf("Textutre SNR Layer start");
else if(startcode==0x1C1) printf("Textutre Tile start");
else if(startcode==0x1C2) printf("Textutre Shape Layer start");
else if(startcode==0x1C3) printf("stuffing start");
else if(startcode<=0x1C5) printf("reserved");
else if(startcode<=0x1FF) printf("System start");
printf(" at %d\n", get_bits_count(gb));
}
switch(startcode){
case 0x120:
decode_vol_header(s, gb);
break;
case 0x1b2:
case USER_DATA_STARTCODE:
decode_user_data(s, gb);
break;
case 0x1b6:
case GOP_STARTCODE:
mpeg4_decode_gop_header(s, gb);
break;
case VOP_STARTCODE:
return decode_vop_header(s, gb);
default:
// printf("startcode %X found\n", startcode);
break;
}

6
libavcodec/mpeg4data.h
View File

@ -27,6 +27,12 @@
#define MB_TYPE_B_BACKW 2
#define MB_TYPE_B_FORW 3
#define VOS_STARTCODE 0x1B0
#define USER_DATA_STARTCODE 0x1B2
#define GOP_STARTCODE 0x1B3
#define VISUAL_OBJ_STARTCODE 0x1B5
#define VOP_STARTCODE 0x1B6
/* dc encoding for mpeg4 */
const UINT8 DCtab_lum[13][2] =
{

1
libavcodec/mpegvideo.h
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@ -435,6 +435,7 @@ typedef struct MpegEncContext {
INT8 (*field_select_table)[2]; /* wtf, no really another table for interlaced b frames */
int t_frame; /* time distance of first I -> B, used for interlaced b frames */
int padding_bug_score; /* used to detect the VERY common padding bug in MPEG4 */
int last_vo_picture_number; /* last picture number for which we added a VOS/VO/VOL header */
/* divx specific, used to workaround (many) bugs in divx5 */
int divx_version;

6
tests/ffmpeg.regression.ref
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@ -11,11 +11,11 @@ a6527e93fe0e2e5942934efbde59f78b *./data/a-h263.avi
f3bc40b0a09eb06504fa5b51eb9135ee *./data/out.yuv
a11e0b741fa3c7fc491fb58ab8f7ca8d *./data/a-h263p.avi
615e3db2bdc535ca5b17996b29cabf24 *./data/out.yuv
5d7af332678d590e921064337ecde8ac *./data/a-odivx.avi
466e2365c9027dea8695cf205adf3b9d *./data/a-odivx.avi
3ede54eadc97f43b4ab260faeb5e8674 *./data/out.yuv
9638438b206816d6cca55a2f822abc24 *./data/a-mpeg4-rc.avi
5811f89254bc1f59528247f3daf11c1f *./data/a-mpeg4-rc.avi
d34057ff0806320c8be54fe34210c937 *./data/out.yuv
4be05fbae92279715a3e88feec87da8e *./data/a-mpeg4-adv.avi
5fa5a878e036d459edd08d873af6a03e *./data/a-mpeg4-adv.avi
59d969f054ed466da9bc9b4c211620fb *./data/out.yuv
2846c8e3d97d7395eb746bfce44e0443 *./data/a-mjpeg.avi
278033451d7a6bfeb8339abbe4228499 *./data/out.yuv