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ffmpeg.wasm-core
Commit cc9ba006 authored by Michael Niedermayer's avatar Michael Niedermayer
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parsing more of the mpeg4 header & print some "not supported" stuff 

Originally committed as revision 317 to svn://svn.ffmpeg.org/ffmpeg/trunk
parent 854288bb
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Showing with 142 additions and 23 deletions
libavcodec/h263.c
View file @ cc9ba006
......@@ -1508,8 +1508,8 @@ int mpeg4_decode_picture_header(MpegEncContext * s)
if (state == 0)
return -1;
}
if (startcode == 0x120) {
//printf("startcode %X %d\n", startcode, get_bits_count(&s->gb));
if (startcode == 0x120) { // Video Object Layer
int time_increment_resolution, width, height, vo_ver_id;
/* vol header */
......@@ -1522,9 +1522,21 @@ int mpeg4_decode_picture_header(MpegEncContext * s)
vo_ver_id = 1;
}
skip_bits(&s->gb, 4); /* aspect_ratio_info */
skip_bits1(&s->gb); /* vol control parameter */
s->aspect_ratio_info= get_bits(&s->gb, 4);
if(s->aspect_ratio_info == EXTENDET_PAR){
skip_bits(&s->gb, 8); //par_width
skip_bits(&s->gb, 8); // par_height
}
if(get_bits1(&s->gb)){ /* vol control parameter */
printf("vol control parameter not supported\n");
return -1;
}
s->shape = get_bits(&s->gb, 2); /* vol shape */
if(s->shape == GRAY_SHAPE && vo_ver_id != 1){
printf("Gray shape not supported\n");
skip_bits(&s->gb, 4); //video_object_layer_shape_extension
}
skip_bits1(&s->gb); /* marker */
time_increment_resolution = get_bits(&s->gb, 16);
......@@ -1537,8 +1549,8 @@ int mpeg4_decode_picture_header(MpegEncContext * s)
skip_bits(&s->gb, s->time_increment_bits);
}
if (s->shape != 2) {
if (s->shape == 0) {
if (s->shape != BIN_ONLY_SHAPE) {
if (s->shape == RECT_SHAPE) {
skip_bits1(&s->gb); /* marker */
width = get_bits(&s->gb, 13);
skip_bits1(&s->gb); /* marker */
......@@ -1547,12 +1559,31 @@ int mpeg4_decode_picture_header(MpegEncContext * s)
}
skip_bits1(&s->gb); /* interlaced */
skip_bits1(&s->gb); /* OBMC */
skip_bits1(&s->gb); /* OBMC Disable */
if (vo_ver_id == 1) {
s->vol_sprite_usage = get_bits1(&s->gb); /* vol_sprite_usage */
} else {
s->vol_sprite_usage = get_bits(&s->gb, 2); /* vol_sprite_usage */
}
if(s->vol_sprite_usage==STATIC_SPRITE || s->vol_sprite_usage==GMC_SPRITE){
if(s->vol_sprite_usage==STATIC_SPRITE){
s->sprite_width = get_bits(&s->gb, 13);
skip_bits1(&s->gb); /* marker */
s->sprite_height= get_bits(&s->gb, 13);
skip_bits1(&s->gb); /* marker */
s->sprite_left = get_bits(&s->gb, 13);
skip_bits1(&s->gb); /* marker */
s->sprite_top = get_bits(&s->gb, 13);
skip_bits1(&s->gb); /* marker */
}
s->no_sprite_wraping_points= get_bits(&s->gb, 6);
s->sprite_warping_accuracy = get_bits(&s->gb, 2);
s->sprite_brightness_change= get_bits1(&s->gb);
if(s->vol_sprite_usage==STATIC_SPRITE)
s->low_latency_sprite= get_bits1(&s->gb);
}
// FIXME sadct disable bit if verid!=1 && shape not rect
if (get_bits1(&s->gb) == 1) { /* not_8_bit */
s->quant_precision = get_bits(&s->gb, 4); /* quant_precision */
skip_bits(&s->gb, 4); /* bits_per_pixel */
......@@ -1560,25 +1591,66 @@ int mpeg4_decode_picture_header(MpegEncContext * s)
s->quant_precision = 5;
}
skip_bits1(&s->gb); /* vol_quant_type */
skip_bits1(&s->gb); /* vol_quarter_pixel */
// FIXME a bunch of grayscale shape things
if(get_bits1(&s->gb)) printf("Quant-Type not supported\n"); /* vol_quant_type */ //FIXME
if(vo_ver_id != 1)
s->quarter_sample= get_bits1(&s->gb);
else s->quarter_sample=0;
if(s->quarter_sample) printf("Quarter sample not supported\n");
#if 0
if(get_bits1(&s->gb)) printf("Complexity est disabled\n");
if(get_bits1(&s->gb)) printf("resync disable\n");
#else
skip_bits1(&s->gb); /* complexity_estimation_disabled */
skip_bits1(&s->gb); /* resync_marker_disabled */
skip_bits1(&s->gb); /* data_partioning_enabled */
if (get_bits1(&s->gb) != 0) { /* scalability */
#endif
s->data_partioning= get_bits1(&s->gb);
if(s->data_partioning){
printf("data partitioning not supported\n");
skip_bits1(&s->gb); // reversible vlc
}
if(vo_ver_id != 1) {
s->new_pred= get_bits1(&s->gb);
if(s->new_pred){
printf("new pred not supported\n");
skip_bits(&s->gb, 2); /* requested upstream message type */
skip_bits1(&s->gb); /* newpred segment type */
}
s->reduced_res_vop= get_bits1(&s->gb);
if(s->reduced_res_vop) printf("reduced resolution VOP not supported\n");
}
else{
s->new_pred=0;
s->reduced_res_vop= 0;
}
s->scalability= get_bits1(&s->gb);
if (s->scalability) {
printf("bad scalability!!!\n");
return -1;
}
}
//printf("end Data %X %d\n", show_bits(&s->gb, 32), get_bits_count(&s->gb)&0x7);
goto redo;
} else if (startcode != 0x1b6) {
} else if (startcode == 0x1b2) { //userdata
//printf("user Data %X\n", show_bits(&s->gb, 32));
goto redo;
} else if (startcode != 0x1b6) { //VOP
goto redo;
}
s->pict_type = get_bits(&s->gb, 2) + 1; /* pict type: I = 0 , P = 1 */
if (s->pict_type != I_TYPE &&
s->pict_type != P_TYPE)
return -1;
if(s->pict_type == B_TYPE)
{
printf("B-VOP\n");
return -1;
}
if(s->pict_type == S_TYPE)
{
printf("S-VOP\n");
return -1;
}
/* XXX: parse time base */
time_incr = 0;
......@@ -1592,14 +1664,16 @@ int mpeg4_decode_picture_header(MpegEncContext * s)
if (get_bits1(&s->gb) != 1)
goto redo;
if (s->shape != 2 && s->pict_type == P_TYPE) {
if (s->shape != BIN_ONLY_SHAPE && ( s->pict_type == P_TYPE
|| (s->pict_type == S_TYPE && s->vol_sprite_usage==GMC_SPRITE))) {
/* rounding type for motion estimation */
s->no_rounding = get_bits1(&s->gb);
} else {
s->no_rounding = 0;
}
if (s->shape != 0) {
//FIXME reduced res stuff
if (s->shape != RECT_SHAPE) {
if (s->vol_sprite_usage != 1 || s->pict_type != I_TYPE) {
int width, height, hor_spat_ref, ver_spat_ref;
......@@ -1617,10 +1691,20 @@ int mpeg4_decode_picture_header(MpegEncContext * s)
skip_bits(&s->gb, 8); /* constant_alpha_value */
}
}
if (s->shape != 2) {
//FIXME complexity estimation stuff
if (s->shape != BIN_ONLY_SHAPE) {
skip_bits(&s->gb, 3); /* intra dc VLC threshold */
//FIXME interlaced specific bits
}
if(s->pict_type == S_TYPE && (s->vol_sprite_usage==STATIC_SPRITE || s->vol_sprite_usage==GMC_SPRITE)){
if(s->no_sprite_wraping_points) printf("sprite_wraping_points not supported\n");
if(s->sprite_brightness_change) printf("sprite_brightness_change not supported\n");
if(s->vol_sprite_usage==STATIC_SPRITE) printf("static sprite not supported\n");
}
if (s->shape != BIN_ONLY_SHAPE) {
/* note: we do not use quant_precision to avoid problem if no
MPEG4 vol header as it is found on some old opendivx
movies */
......@@ -1629,10 +1713,17 @@ int mpeg4_decode_picture_header(MpegEncContext * s)
if (s->pict_type != I_TYPE) {
s->f_code = get_bits(&s->gb, 3); /* fcode_for */
}
if (s->shape && (s->pict_type != I_TYPE)) {
skip_bits1(&s->gb); // vop shape coding type
if (s->pict_type == B_TYPE) {
s->b_code = get_bits(&s->gb, 3);
}
if(!s->scalability){
if (s->shape!=RECT_SHAPE && s->pict_type!=I_TYPE) {
skip_bits1(&s->gb); // vop shape coding type
}
}
}
//printf("end Data %X %d\n", show_bits(&s->gb, 32), get_bits_count(&s->gb)&0x7);
return 0;
}
......
libavcodec/mpeg4data.h
View file @ cc9ba006
// shapes
#define RECT_SHAPE 0
#define BIN_SHAPE 1
#define BIN_ONLY_SHAPE 2
#define GRAY_SHAPE 3
// aspect_ratio_info
#define EXTENDET_PAR 15
//vol_sprite_usage / sprite_enable
#define STATIC_SPRITE 1
#define GMC_SPRITE 2
/* dc encoding for mpeg4 */
static const UINT8 DCtab_lum[13][2] =
......
libavcodec/mpegvideo.h
View file @ cc9ba006
......@@ -21,6 +21,7 @@
#define I_TYPE 1
#define P_TYPE 2
#define B_TYPE 3
#define S_TYPE 4 //S(GMC)-VOP MPEG4
enum OutputFormat {
FMT_MPEG1,
......@@ -89,6 +90,7 @@ typedef struct MpegEncContext {
int h263_long_vectors; /* use horrible h263v1 long vector mode */
int f_code; /* resolution */
int b_code; /* resolution for B Frames*/
INT16 *mv_table[2]; /* MV table */
INT16 (*motion_val)[2]; /* used for MV prediction */
int full_search;
......@@ -157,7 +159,21 @@ typedef struct MpegEncContext {
int time_increment_bits;
int shape;
int vol_sprite_usage;
int sprite_width;
int sprite_height;
int sprite_left;
int sprite_top;
int sprite_brightness_change;
int no_sprite_wraping_points;
int quant_precision;
int quarter_sample;
int scalability;
int new_pred;
int reduced_res_vop;
int aspect_ratio_info;
int sprite_warping_accuracy;
int low_latency_sprite;
int data_partioning;
/* RV10 specific */
int rv10_version; /* RV10 version: 0 or 3 */
......
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