| ca334dd1 |
/*
* MPEG4 decoder.
* Copyright (c) 2000,2001 Fabrice Bellard
* Copyright (c) 2002-2010 Michael Niedermayer <michaelni@gmx.at>
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
|
| 06192e42 |
#define UNCHECKED_BITSTREAM_READER 1
|
| f51e5015 |
#include "libavutil/opt.h" |
| ca334dd1 |
#include "mpegvideo.h"
#include "mpeg4video.h"
#include "h263.h" |
| d375c104 |
#include "thread.h" |
| ca334dd1 |
// The defines below define the number of bits that are read at once for
// reading vlc values. Changing these may improve speed and data cache needs
// be aware though that decreasing them may need the number of stages that is
// passed to get_vlc* to be increased.
#define SPRITE_TRAJ_VLC_BITS 6
#define DC_VLC_BITS 9
#define MB_TYPE_B_VLC_BITS 4
static VLC dc_lum, dc_chrom;
static VLC sprite_trajectory;
static VLC mb_type_b_vlc;
static const int mb_type_b_map[4]= {
MB_TYPE_DIRECT2 | MB_TYPE_L0L1,
MB_TYPE_L0L1 | MB_TYPE_16x16,
MB_TYPE_L1 | MB_TYPE_16x16,
MB_TYPE_L0 | MB_TYPE_16x16,
};
/** |
| 58c42af7 |
* Predict the ac. |
| ca334dd1 |
* @param n block index (0-3 are luma, 4-5 are chroma)
* @param dir the ac prediction direction
*/ |
| 88bd7fdc |
void ff_mpeg4_pred_ac(MpegEncContext * s, int16_t *block, int n, |
| 6f13a371 |
int dir) |
| ca334dd1 |
{
int i;
int16_t *ac_val, *ac_val1; |
| 657ccb5a |
int8_t * const qscale_table = s->current_picture.f.qscale_table; |
| ca334dd1 |
/* find prediction */
ac_val = s->ac_val[0][0] + s->block_index[n] * 16;
ac_val1 = ac_val;
if (s->ac_pred) {
if (dir == 0) {
const int xy= s->mb_x-1 + s->mb_y*s->mb_stride;
/* left prediction */
ac_val -= 16;
if(s->mb_x==0 || s->qscale == qscale_table[xy] || n==1 || n==3){
/* same qscale */
for(i=1;i<8;i++) {
block[s->dsp.idct_permutation[i<<3]] += ac_val[i];
}
}else{
/* different qscale, we must rescale */
for(i=1;i<8;i++) {
block[s->dsp.idct_permutation[i<<3]] += ROUNDED_DIV(ac_val[i]*qscale_table[xy], s->qscale);
}
}
} else {
const int xy= s->mb_x + s->mb_y*s->mb_stride - s->mb_stride;
/* top prediction */
ac_val -= 16 * s->block_wrap[n];
if(s->mb_y==0 || s->qscale == qscale_table[xy] || n==2 || n==3){
/* same qscale */
for(i=1;i<8;i++) {
block[s->dsp.idct_permutation[i]] += ac_val[i + 8];
}
}else{
/* different qscale, we must rescale */
for(i=1;i<8;i++) {
block[s->dsp.idct_permutation[i]] += ROUNDED_DIV(ac_val[i + 8]*qscale_table[xy], s->qscale);
}
}
}
}
/* left copy */
for(i=1;i<8;i++)
ac_val1[i ] = block[s->dsp.idct_permutation[i<<3]];
/* top copy */
for(i=1;i<8;i++)
ac_val1[8 + i] = block[s->dsp.idct_permutation[i ]];
}
/**
* check if the next stuff is a resync marker or the end.
* @return 0 if not
*/
static inline int mpeg4_is_resync(MpegEncContext *s){
int bits_count= get_bits_count(&s->gb);
int v= show_bits(&s->gb, 16);
|
| 9251942c |
if(s->workaround_bugs&FF_BUG_NO_PADDING && !s->resync_marker){ |
| ca334dd1 |
return 0;
}
while(v<=0xFF){ |
| ce5e49b0 |
if(s->pict_type==AV_PICTURE_TYPE_B || (v>>(8-s->pict_type)!=1) || s->partitioned_frame) |
| ca334dd1 |
break;
skip_bits(&s->gb, 8+s->pict_type);
bits_count+= 8+s->pict_type;
v= show_bits(&s->gb, 16);
}
if(bits_count + 8 >= s->gb.size_in_bits){
v>>=8;
v|= 0x7F >> (7-(bits_count&7));
if(v==0x7F) |
| 78a041a9 |
return s->mb_num; |
| ca334dd1 |
}else{
if(v == ff_mpeg4_resync_prefix[bits_count&7]){ |
| 78a041a9 |
int len, mb_num;
int mb_num_bits= av_log2(s->mb_num - 1) + 1; |
| ca334dd1 |
GetBitContext gb= s->gb;
skip_bits(&s->gb, 1);
align_get_bits(&s->gb);
for(len=0; len<32; len++){
if(get_bits1(&s->gb)) break;
}
|
| 78a041a9 |
mb_num= get_bits(&s->gb, mb_num_bits);
if(!mb_num || mb_num > s->mb_num || get_bits_count(&s->gb)+6 > s->gb.size_in_bits)
mb_num= -1;
|
| ca334dd1 |
s->gb= gb;
if(len>=ff_mpeg4_get_video_packet_prefix_length(s)) |
| 78a041a9 |
return mb_num; |
| ca334dd1 |
}
}
return 0;
}
|
| fc5c49ab |
static int mpeg4_decode_sprite_trajectory(MpegEncContext * s, GetBitContext *gb) |
| ca334dd1 |
{
int i;
int a= 2<<s->sprite_warping_accuracy;
int rho= 3-s->sprite_warping_accuracy;
int r=16/a;
const int vop_ref[4][2]= {{0,0}, {s->width,0}, {0, s->height}, {s->width, s->height}}; // only true for rectangle shapes
int d[4][2]={{0,0}, {0,0}, {0,0}, {0,0}};
int sprite_ref[4][2];
int virtual_ref[2][2];
int w2, h2, w3, h3;
int alpha=0, beta=0;
int w= s->width;
int h= s->height;
int min_ab;
|
| fc5c49ab |
if(w<=0 || h<=0)
return -1;
|
| ca334dd1 |
for(i=0; i<s->num_sprite_warping_points; i++){
int length;
int x=0, y=0;
length= get_vlc2(gb, sprite_trajectory.table, SPRITE_TRAJ_VLC_BITS, 3);
if(length){
x= get_xbits(gb, length);
}
if(!(s->divx_version==500 && s->divx_build==413)) skip_bits1(gb); /* marker bit */
length= get_vlc2(gb, sprite_trajectory.table, SPRITE_TRAJ_VLC_BITS, 3);
if(length){
y=get_xbits(gb, length);
}
skip_bits1(gb); /* marker bit */
s->sprite_traj[i][0]= d[i][0]= x;
s->sprite_traj[i][1]= d[i][1]= y;
}
for(; i<4; i++)
s->sprite_traj[i][0]= s->sprite_traj[i][1]= 0;
while((1<<alpha)<w) alpha++;
while((1<<beta )<h) beta++; // there seems to be a typo in the mpeg4 std for the definition of w' and h'
w2= 1<<alpha;
h2= 1<<beta;
// Note, the 4th point isn't used for GMC
if(s->divx_version==500 && s->divx_build==413){
sprite_ref[0][0]= a*vop_ref[0][0] + d[0][0];
sprite_ref[0][1]= a*vop_ref[0][1] + d[0][1];
sprite_ref[1][0]= a*vop_ref[1][0] + d[0][0] + d[1][0];
sprite_ref[1][1]= a*vop_ref[1][1] + d[0][1] + d[1][1];
sprite_ref[2][0]= a*vop_ref[2][0] + d[0][0] + d[2][0];
sprite_ref[2][1]= a*vop_ref[2][1] + d[0][1] + d[2][1];
} else {
sprite_ref[0][0]= (a>>1)*(2*vop_ref[0][0] + d[0][0]);
sprite_ref[0][1]= (a>>1)*(2*vop_ref[0][1] + d[0][1]);
sprite_ref[1][0]= (a>>1)*(2*vop_ref[1][0] + d[0][0] + d[1][0]);
sprite_ref[1][1]= (a>>1)*(2*vop_ref[1][1] + d[0][1] + d[1][1]);
sprite_ref[2][0]= (a>>1)*(2*vop_ref[2][0] + d[0][0] + d[2][0]);
sprite_ref[2][1]= (a>>1)*(2*vop_ref[2][1] + d[0][1] + d[2][1]);
}
/* sprite_ref[3][0]= (a>>1)*(2*vop_ref[3][0] + d[0][0] + d[1][0] + d[2][0] + d[3][0]);
sprite_ref[3][1]= (a>>1)*(2*vop_ref[3][1] + d[0][1] + d[1][1] + d[2][1] + d[3][1]); */
// this is mostly identical to the mpeg4 std (and is totally unreadable because of that ...)
// perhaps it should be reordered to be more readable ...
// the idea behind this virtual_ref mess is to be able to use shifts later per pixel instead of divides
// so the distance between points is converted from w&h based to w2&h2 based which are of the 2^x form
virtual_ref[0][0]= 16*(vop_ref[0][0] + w2)
+ ROUNDED_DIV(((w - w2)*(r*sprite_ref[0][0] - 16*vop_ref[0][0]) + w2*(r*sprite_ref[1][0] - 16*vop_ref[1][0])),w);
virtual_ref[0][1]= 16*vop_ref[0][1]
+ ROUNDED_DIV(((w - w2)*(r*sprite_ref[0][1] - 16*vop_ref[0][1]) + w2*(r*sprite_ref[1][1] - 16*vop_ref[1][1])),w);
virtual_ref[1][0]= 16*vop_ref[0][0]
+ ROUNDED_DIV(((h - h2)*(r*sprite_ref[0][0] - 16*vop_ref[0][0]) + h2*(r*sprite_ref[2][0] - 16*vop_ref[2][0])),h);
virtual_ref[1][1]= 16*(vop_ref[0][1] + h2)
+ ROUNDED_DIV(((h - h2)*(r*sprite_ref[0][1] - 16*vop_ref[0][1]) + h2*(r*sprite_ref[2][1] - 16*vop_ref[2][1])),h);
switch(s->num_sprite_warping_points)
{
case 0:
s->sprite_offset[0][0]= 0;
s->sprite_offset[0][1]= 0;
s->sprite_offset[1][0]= 0;
s->sprite_offset[1][1]= 0;
s->sprite_delta[0][0]= a;
s->sprite_delta[0][1]= 0;
s->sprite_delta[1][0]= 0;
s->sprite_delta[1][1]= a;
s->sprite_shift[0]= 0;
s->sprite_shift[1]= 0;
break;
case 1: //GMC only
s->sprite_offset[0][0]= sprite_ref[0][0] - a*vop_ref[0][0];
s->sprite_offset[0][1]= sprite_ref[0][1] - a*vop_ref[0][1];
s->sprite_offset[1][0]= ((sprite_ref[0][0]>>1)|(sprite_ref[0][0]&1)) - a*(vop_ref[0][0]/2);
s->sprite_offset[1][1]= ((sprite_ref[0][1]>>1)|(sprite_ref[0][1]&1)) - a*(vop_ref[0][1]/2);
s->sprite_delta[0][0]= a;
s->sprite_delta[0][1]= 0;
s->sprite_delta[1][0]= 0;
s->sprite_delta[1][1]= a;
s->sprite_shift[0]= 0;
s->sprite_shift[1]= 0;
break;
case 2:
s->sprite_offset[0][0]= (sprite_ref[0][0]<<(alpha+rho))
+ (-r*sprite_ref[0][0] + virtual_ref[0][0])*(-vop_ref[0][0])
+ ( r*sprite_ref[0][1] - virtual_ref[0][1])*(-vop_ref[0][1])
+ (1<<(alpha+rho-1));
s->sprite_offset[0][1]= (sprite_ref[0][1]<<(alpha+rho))
+ (-r*sprite_ref[0][1] + virtual_ref[0][1])*(-vop_ref[0][0])
+ (-r*sprite_ref[0][0] + virtual_ref[0][0])*(-vop_ref[0][1])
+ (1<<(alpha+rho-1));
s->sprite_offset[1][0]= ( (-r*sprite_ref[0][0] + virtual_ref[0][0])*(-2*vop_ref[0][0] + 1)
+( r*sprite_ref[0][1] - virtual_ref[0][1])*(-2*vop_ref[0][1] + 1)
+2*w2*r*sprite_ref[0][0]
- 16*w2
+ (1<<(alpha+rho+1)));
s->sprite_offset[1][1]= ( (-r*sprite_ref[0][1] + virtual_ref[0][1])*(-2*vop_ref[0][0] + 1)
+(-r*sprite_ref[0][0] + virtual_ref[0][0])*(-2*vop_ref[0][1] + 1)
+2*w2*r*sprite_ref[0][1]
- 16*w2
+ (1<<(alpha+rho+1)));
s->sprite_delta[0][0]= (-r*sprite_ref[0][0] + virtual_ref[0][0]);
s->sprite_delta[0][1]= (+r*sprite_ref[0][1] - virtual_ref[0][1]);
s->sprite_delta[1][0]= (-r*sprite_ref[0][1] + virtual_ref[0][1]);
s->sprite_delta[1][1]= (-r*sprite_ref[0][0] + virtual_ref[0][0]);
s->sprite_shift[0]= alpha+rho;
s->sprite_shift[1]= alpha+rho+2;
break;
case 3:
min_ab= FFMIN(alpha, beta);
w3= w2>>min_ab;
h3= h2>>min_ab;
s->sprite_offset[0][0]= (sprite_ref[0][0]<<(alpha+beta+rho-min_ab))
+ (-r*sprite_ref[0][0] + virtual_ref[0][0])*h3*(-vop_ref[0][0])
+ (-r*sprite_ref[0][0] + virtual_ref[1][0])*w3*(-vop_ref[0][1])
+ (1<<(alpha+beta+rho-min_ab-1));
s->sprite_offset[0][1]= (sprite_ref[0][1]<<(alpha+beta+rho-min_ab))
+ (-r*sprite_ref[0][1] + virtual_ref[0][1])*h3*(-vop_ref[0][0])
+ (-r*sprite_ref[0][1] + virtual_ref[1][1])*w3*(-vop_ref[0][1])
+ (1<<(alpha+beta+rho-min_ab-1));
s->sprite_offset[1][0]= (-r*sprite_ref[0][0] + virtual_ref[0][0])*h3*(-2*vop_ref[0][0] + 1)
+ (-r*sprite_ref[0][0] + virtual_ref[1][0])*w3*(-2*vop_ref[0][1] + 1)
+ 2*w2*h3*r*sprite_ref[0][0]
- 16*w2*h3
+ (1<<(alpha+beta+rho-min_ab+1));
s->sprite_offset[1][1]= (-r*sprite_ref[0][1] + virtual_ref[0][1])*h3*(-2*vop_ref[0][0] + 1)
+ (-r*sprite_ref[0][1] + virtual_ref[1][1])*w3*(-2*vop_ref[0][1] + 1)
+ 2*w2*h3*r*sprite_ref[0][1]
- 16*w2*h3
+ (1<<(alpha+beta+rho-min_ab+1));
s->sprite_delta[0][0]= (-r*sprite_ref[0][0] + virtual_ref[0][0])*h3;
s->sprite_delta[0][1]= (-r*sprite_ref[0][0] + virtual_ref[1][0])*w3;
s->sprite_delta[1][0]= (-r*sprite_ref[0][1] + virtual_ref[0][1])*h3;
s->sprite_delta[1][1]= (-r*sprite_ref[0][1] + virtual_ref[1][1])*w3;
s->sprite_shift[0]= alpha + beta + rho - min_ab;
s->sprite_shift[1]= alpha + beta + rho - min_ab + 2;
break;
}
/* try to simplify the situation */
if( s->sprite_delta[0][0] == a<<s->sprite_shift[0]
&& s->sprite_delta[0][1] == 0
&& s->sprite_delta[1][0] == 0
&& s->sprite_delta[1][1] == a<<s->sprite_shift[0])
{
s->sprite_offset[0][0]>>=s->sprite_shift[0];
s->sprite_offset[0][1]>>=s->sprite_shift[0];
s->sprite_offset[1][0]>>=s->sprite_shift[1];
s->sprite_offset[1][1]>>=s->sprite_shift[1];
s->sprite_delta[0][0]= a;
s->sprite_delta[0][1]= 0;
s->sprite_delta[1][0]= 0;
s->sprite_delta[1][1]= a;
s->sprite_shift[0]= 0;
s->sprite_shift[1]= 0;
s->real_sprite_warping_points=1;
}
else{
int shift_y= 16 - s->sprite_shift[0];
int shift_c= 16 - s->sprite_shift[1];
for(i=0; i<2; i++){
s->sprite_offset[0][i]<<= shift_y;
s->sprite_offset[1][i]<<= shift_c;
s->sprite_delta[0][i]<<= shift_y;
s->sprite_delta[1][i]<<= shift_y;
s->sprite_shift[i]= 16;
}
s->real_sprite_warping_points= s->num_sprite_warping_points;
} |
| fc5c49ab |
return 0; |
| ca334dd1 |
}
/** |
| 58c42af7 |
* Decode the next video packet. |
| ca334dd1 |
* @return <0 if something went wrong
*/ |
| 6f13a371 |
int ff_mpeg4_decode_video_packet_header(MpegEncContext *s) |
| ca334dd1 |
{
int mb_num_bits= av_log2(s->mb_num - 1) + 1;
int header_extension=0, mb_num, len;
/* is there enough space left for a video packet + header */
if( get_bits_count(&s->gb) > s->gb.size_in_bits-20) return -1;
for(len=0; len<32; len++){
if(get_bits1(&s->gb)) break;
}
if(len!=ff_mpeg4_get_video_packet_prefix_length(s)){
av_log(s->avctx, AV_LOG_ERROR, "marker does not match f_code\n");
return -1;
}
if(s->shape != RECT_SHAPE){
header_extension= get_bits1(&s->gb);
//FIXME more stuff here
}
mb_num= get_bits(&s->gb, mb_num_bits);
if(mb_num>=s->mb_num){
av_log(s->avctx, AV_LOG_ERROR, "illegal mb_num in video packet (%d %d) \n", mb_num, s->mb_num);
return -1;
}
s->mb_x= mb_num % s->mb_width;
s->mb_y= mb_num / s->mb_width;
if(s->shape != BIN_ONLY_SHAPE){
int qscale= get_bits(&s->gb, s->quant_precision);
if(qscale)
s->chroma_qscale=s->qscale= qscale;
}
if(s->shape == RECT_SHAPE){
header_extension= get_bits1(&s->gb);
}
if(header_extension){
int time_incr=0;
while (get_bits1(&s->gb) != 0)
time_incr++;
check_marker(&s->gb, "before time_increment in video packed header"); |
| e65ab9d9 |
skip_bits(&s->gb, s->time_increment_bits); /* time_increment */ |
| ca334dd1 |
check_marker(&s->gb, "before vop_coding_type in video packed header");
skip_bits(&s->gb, 2); /* vop coding type */
//FIXME not rect stuff here
if(s->shape != BIN_ONLY_SHAPE){
skip_bits(&s->gb, 3); /* intra dc vlc threshold */
//FIXME don't just ignore everything |
| ce5e49b0 |
if(s->pict_type == AV_PICTURE_TYPE_S && s->vol_sprite_usage==GMC_SPRITE){ |
| fc5c49ab |
if(mpeg4_decode_sprite_trajectory(s, &s->gb) < 0)
return -1; |
| ca334dd1 |
av_log(s->avctx, AV_LOG_ERROR, "untested\n");
}
//FIXME reduced res stuff here
|
| ce5e49b0 |
if (s->pict_type != AV_PICTURE_TYPE_I) { |
| ca334dd1 |
int f_code = get_bits(&s->gb, 3); /* fcode_for */
if(f_code==0){
av_log(s->avctx, AV_LOG_ERROR, "Error, video packet header damaged (f_code=0)\n");
}
} |
| ce5e49b0 |
if (s->pict_type == AV_PICTURE_TYPE_B) { |
| ca334dd1 |
int b_code = get_bits(&s->gb, 3);
if(b_code==0){
av_log(s->avctx, AV_LOG_ERROR, "Error, video packet header damaged (b_code=0)\n");
}
}
}
}
//FIXME new-pred stuff
return 0;
}
/** |
| 58c42af7 |
* Get the average motion vector for a GMC MB. |
| ca334dd1 |
* @param n either 0 for the x component or 1 for y |
| 32e543f8 |
* @return the average MV for a GMC MB |
| ca334dd1 |
*/
static inline int get_amv(MpegEncContext *s, int n){
int x, y, mb_v, sum, dx, dy, shift;
int len = 1 << (s->f_code + 4);
const int a= s->sprite_warping_accuracy;
if(s->workaround_bugs & FF_BUG_AMV)
len >>= s->quarter_sample;
if(s->real_sprite_warping_points==1){
if(s->divx_version==500 && s->divx_build==413)
sum= s->sprite_offset[0][n] / (1<<(a - s->quarter_sample));
else
sum= RSHIFT(s->sprite_offset[0][n]<<s->quarter_sample, a);
}else{
dx= s->sprite_delta[n][0];
dy= s->sprite_delta[n][1];
shift= s->sprite_shift[0];
if(n) dy -= 1<<(shift + a + 1);
else dx -= 1<<(shift + a + 1);
mb_v= s->sprite_offset[0][n] + dx*s->mb_x*16 + dy*s->mb_y*16;
sum=0;
for(y=0; y<16; y++){
int v;
v= mb_v + dy*y;
//XXX FIXME optimize
for(x=0; x<16; x++){
sum+= v>>shift;
v+= dx;
}
}
sum= RSHIFT(sum, a+8-s->quarter_sample);
}
if (sum < -len) sum= -len;
else if (sum >= len) sum= len-1;
return sum;
}
/** |
| 58c42af7 |
* Decode the dc value. |
| ca334dd1 |
* @param n block index (0-3 are luma, 4-5 are chroma)
* @param dir_ptr the prediction direction will be stored here
* @return the quantized dc
*/
static inline int mpeg4_decode_dc(MpegEncContext * s, int n, int *dir_ptr)
{
int level, code;
if (n < 4)
code = get_vlc2(&s->gb, dc_lum.table, DC_VLC_BITS, 1);
else
code = get_vlc2(&s->gb, dc_chrom.table, DC_VLC_BITS, 1);
if (code < 0 || code > 9 /* && s->nbit<9 */){
av_log(s->avctx, AV_LOG_ERROR, "illegal dc vlc\n");
return -1;
}
if (code == 0) {
level = 0;
} else {
if(IS_3IV1){
if(code==1)
level= 2*get_bits1(&s->gb)-1;
else{
if(get_bits1(&s->gb))
level = get_bits(&s->gb, code-1) + (1<<(code-1));
else
level = -get_bits(&s->gb, code-1) - (1<<(code-1));
}
}else{
level = get_xbits(&s->gb, code);
}
if (code > 8){
if(get_bits1(&s->gb)==0){ /* marker */ |
| c9cab022 |
if(s->err_recognition&(AV_EF_BITSTREAM|AV_EF_COMPLIANT)){ |
| ca334dd1 |
av_log(s->avctx, AV_LOG_ERROR, "dc marker bit missing\n");
return -1;
}
}
}
}
return ff_mpeg4_pred_dc(s, n, level, dir_ptr, 0);
}
/** |
| 58c42af7 |
* Decode first partition. |
| ca334dd1 |
* @return number of MBs decoded or <0 if an error occurred
*/
static int mpeg4_decode_partition_a(MpegEncContext *s){
int mb_num;
static const int8_t quant_tab[4] = { -1, -2, 1, 2 };
/* decode first partition */
mb_num=0;
s->first_slice_line=1;
for(; s->mb_y<s->mb_height; s->mb_y++){
ff_init_block_index(s);
for(; s->mb_x<s->mb_width; s->mb_x++){
const int xy= s->mb_x + s->mb_y*s->mb_stride;
int cbpc;
int dir=0;
mb_num++;
ff_update_block_index(s);
if(s->mb_x == s->resync_mb_x && s->mb_y == s->resync_mb_y+1)
s->first_slice_line=0;
|
| ce5e49b0 |
if(s->pict_type==AV_PICTURE_TYPE_I){ |
| ca334dd1 |
int i;
do{
if(show_bits_long(&s->gb, 19)==DC_MARKER){
return mb_num-1;
}
|
| 101ada9a |
cbpc = get_vlc2(&s->gb, ff_h263_intra_MCBPC_vlc.table, INTRA_MCBPC_VLC_BITS, 2); |
| ca334dd1 |
if (cbpc < 0){
av_log(s->avctx, AV_LOG_ERROR, "cbpc corrupted at %d %d\n", s->mb_x, s->mb_y);
return -1;
}
}while(cbpc == 8);
s->cbp_table[xy]= cbpc & 3; |
| 657ccb5a |
s->current_picture.f.mb_type[xy] = MB_TYPE_INTRA; |
| ca334dd1 |
s->mb_intra = 1;
if(cbpc & 4) {
ff_set_qscale(s, s->qscale + quant_tab[get_bits(&s->gb, 2)]);
} |
| 657ccb5a |
s->current_picture.f.qscale_table[xy]= s->qscale; |
| ca334dd1 |
s->mbintra_table[xy]= 1;
for(i=0; i<6; i++){
int dc_pred_dir;
int dc= mpeg4_decode_dc(s, i, &dc_pred_dir);
if(dc < 0){
av_log(s->avctx, AV_LOG_ERROR, "DC corrupted at %d %d\n", s->mb_x, s->mb_y);
return -1;
}
dir<<=1;
if(dc_pred_dir) dir|=1;
}
s->pred_dir_table[xy]= dir;
}else{ /* P/S_TYPE */
int mx, my, pred_x, pred_y, bits; |
| 657ccb5a |
int16_t * const mot_val = s->current_picture.f.motion_val[0][s->block_index[0]]; |
| ca334dd1 |
const int stride= s->b8_stride*2;
try_again:
bits= show_bits(&s->gb, 17);
if(bits==MOTION_MARKER){
return mb_num-1;
}
skip_bits1(&s->gb);
if(bits&0x10000){
/* skip mb */ |
| ce5e49b0 |
if(s->pict_type==AV_PICTURE_TYPE_S && s->vol_sprite_usage==GMC_SPRITE){ |
| 657ccb5a |
s->current_picture.f.mb_type[xy] = MB_TYPE_SKIP | MB_TYPE_16x16 | MB_TYPE_GMC | MB_TYPE_L0; |
| ca334dd1 |
mx= get_amv(s, 0);
my= get_amv(s, 1);
}else{ |
| 657ccb5a |
s->current_picture.f.mb_type[xy] = MB_TYPE_SKIP | MB_TYPE_16x16 | MB_TYPE_L0; |
| ca334dd1 |
mx=my=0;
}
mot_val[0 ]= mot_val[2 ]=
mot_val[0+stride]= mot_val[2+stride]= mx;
mot_val[1 ]= mot_val[3 ]=
mot_val[1+stride]= mot_val[3+stride]= my;
if(s->mbintra_table[xy])
ff_clean_intra_table_entries(s);
continue;
}
|
| 101ada9a |
cbpc = get_vlc2(&s->gb, ff_h263_inter_MCBPC_vlc.table, INTER_MCBPC_VLC_BITS, 2); |
| ca334dd1 |
if (cbpc < 0){
av_log(s->avctx, AV_LOG_ERROR, "cbpc corrupted at %d %d\n", s->mb_x, s->mb_y);
return -1;
}
if(cbpc == 20)
goto try_again;
s->cbp_table[xy]= cbpc&(8+3); //8 is dquant
s->mb_intra = ((cbpc & 4) != 0);
if(s->mb_intra){ |
| 657ccb5a |
s->current_picture.f.mb_type[xy] = MB_TYPE_INTRA; |
| ca334dd1 |
s->mbintra_table[xy]= 1;
mot_val[0 ]= mot_val[2 ]=
mot_val[0+stride]= mot_val[2+stride]= 0;
mot_val[1 ]= mot_val[3 ]=
mot_val[1+stride]= mot_val[3+stride]= 0;
}else{
if(s->mbintra_table[xy])
ff_clean_intra_table_entries(s);
|
| ce5e49b0 |
if(s->pict_type==AV_PICTURE_TYPE_S && s->vol_sprite_usage==GMC_SPRITE && (cbpc & 16) == 0) |
| ca334dd1 |
s->mcsel= get_bits1(&s->gb);
else s->mcsel= 0;
if ((cbpc & 16) == 0) {
/* 16x16 motion prediction */
|
| ddce8953 |
ff_h263_pred_motion(s, 0, 0, &pred_x, &pred_y); |
| ca334dd1 |
if(!s->mcsel){ |
| ddce8953 |
mx = ff_h263_decode_motion(s, pred_x, s->f_code); |
| ca334dd1 |
if (mx >= 0xffff)
return -1;
|
| ddce8953 |
my = ff_h263_decode_motion(s, pred_y, s->f_code); |
| ca334dd1 |
if (my >= 0xffff)
return -1; |
| 657ccb5a |
s->current_picture.f.mb_type[xy] = MB_TYPE_16x16 | MB_TYPE_L0; |
| ca334dd1 |
} else {
mx = get_amv(s, 0);
my = get_amv(s, 1); |
| 657ccb5a |
s->current_picture.f.mb_type[xy] = MB_TYPE_16x16 | MB_TYPE_GMC | MB_TYPE_L0; |
| ca334dd1 |
}
mot_val[0 ]= mot_val[2 ] =
mot_val[0+stride]= mot_val[2+stride]= mx;
mot_val[1 ]= mot_val[3 ]=
mot_val[1+stride]= mot_val[3+stride]= my;
} else {
int i; |
| 657ccb5a |
s->current_picture.f.mb_type[xy] = MB_TYPE_8x8 | MB_TYPE_L0; |
| ca334dd1 |
for(i=0;i<4;i++) { |
| ddce8953 |
int16_t *mot_val= ff_h263_pred_motion(s, i, 0, &pred_x, &pred_y);
mx = ff_h263_decode_motion(s, pred_x, s->f_code); |
| ca334dd1 |
if (mx >= 0xffff)
return -1;
|
| ddce8953 |
my = ff_h263_decode_motion(s, pred_y, s->f_code); |
| ca334dd1 |
if (my >= 0xffff)
return -1;
mot_val[0] = mx;
mot_val[1] = my;
}
}
}
}
}
s->mb_x= 0;
}
return mb_num;
}
/**
* decode second partition.
* @return <0 if an error occurred
*/
static int mpeg4_decode_partition_b(MpegEncContext *s, int mb_count){
int mb_num=0;
static const int8_t quant_tab[4] = { -1, -2, 1, 2 };
s->mb_x= s->resync_mb_x;
s->first_slice_line=1;
for(s->mb_y= s->resync_mb_y; mb_num < mb_count; s->mb_y++){
ff_init_block_index(s);
for(; mb_num < mb_count && s->mb_x<s->mb_width; s->mb_x++){
const int xy= s->mb_x + s->mb_y*s->mb_stride;
mb_num++;
ff_update_block_index(s);
if(s->mb_x == s->resync_mb_x && s->mb_y == s->resync_mb_y+1)
s->first_slice_line=0;
|
| ce5e49b0 |
if(s->pict_type==AV_PICTURE_TYPE_I){ |
| ca334dd1 |
int ac_pred= get_bits1(&s->gb); |
| 101ada9a |
int cbpy = get_vlc2(&s->gb, ff_h263_cbpy_vlc.table, CBPY_VLC_BITS, 1); |
| ca334dd1 |
if(cbpy<0){
av_log(s->avctx, AV_LOG_ERROR, "cbpy corrupted at %d %d\n", s->mb_x, s->mb_y);
return -1;
}
s->cbp_table[xy]|= cbpy<<2; |
| 657ccb5a |
s->current_picture.f.mb_type[xy] |= ac_pred*MB_TYPE_ACPRED; |
| ca334dd1 |
}else{ /* P || S_TYPE */ |
| 657ccb5a |
if (IS_INTRA(s->current_picture.f.mb_type[xy])) { |
| ca334dd1 |
int dir=0,i;
int ac_pred = get_bits1(&s->gb); |
| 101ada9a |
int cbpy = get_vlc2(&s->gb, ff_h263_cbpy_vlc.table, CBPY_VLC_BITS, 1); |
| ca334dd1 |
if(cbpy<0){
av_log(s->avctx, AV_LOG_ERROR, "I cbpy corrupted at %d %d\n", s->mb_x, s->mb_y);
return -1;
}
if(s->cbp_table[xy] & 8) {
ff_set_qscale(s, s->qscale + quant_tab[get_bits(&s->gb, 2)]);
} |
| 657ccb5a |
s->current_picture.f.qscale_table[xy] = s->qscale; |
| ca334dd1 |
for(i=0; i<6; i++){
int dc_pred_dir;
int dc= mpeg4_decode_dc(s, i, &dc_pred_dir);
if(dc < 0){
av_log(s->avctx, AV_LOG_ERROR, "DC corrupted at %d %d\n", s->mb_x, s->mb_y);
return -1;
}
dir<<=1;
if(dc_pred_dir) dir|=1;
}
s->cbp_table[xy]&= 3; //remove dquant
s->cbp_table[xy]|= cbpy<<2; |
| 657ccb5a |
s->current_picture.f.mb_type[xy] |= ac_pred*MB_TYPE_ACPRED; |
| ca334dd1 |
s->pred_dir_table[xy]= dir; |
| 657ccb5a |
} else if (IS_SKIP(s->current_picture.f.mb_type[xy])) {
s->current_picture.f.qscale_table[xy] = s->qscale; |
| ca334dd1 |
s->cbp_table[xy]= 0;
}else{ |
| 101ada9a |
int cbpy = get_vlc2(&s->gb, ff_h263_cbpy_vlc.table, CBPY_VLC_BITS, 1); |
| ca334dd1 |
if(cbpy<0){
av_log(s->avctx, AV_LOG_ERROR, "P cbpy corrupted at %d %d\n", s->mb_x, s->mb_y);
return -1;
}
if(s->cbp_table[xy] & 8) {
ff_set_qscale(s, s->qscale + quant_tab[get_bits(&s->gb, 2)]);
} |
| 657ccb5a |
s->current_picture.f.qscale_table[xy] = s->qscale; |
| ca334dd1 |
s->cbp_table[xy]&= 3; //remove dquant
s->cbp_table[xy]|= (cbpy^0xf)<<2;
}
}
}
if(mb_num >= mb_count) return 0;
s->mb_x= 0;
}
return 0;
}
/** |
| 58c42af7 |
* Decode the first and second partition. |
| ca334dd1 |
* @return <0 if error (and sets error type in the error_status_table)
*/
int ff_mpeg4_decode_partitions(MpegEncContext *s)
{
int mb_num; |
| 5bf2ac2b |
const int part_a_error= s->pict_type==AV_PICTURE_TYPE_I ? (ER_DC_ERROR|ER_MV_ERROR) : ER_MV_ERROR;
const int part_a_end = s->pict_type==AV_PICTURE_TYPE_I ? (ER_DC_END |ER_MV_END) : ER_MV_END; |
| ca334dd1 |
mb_num= mpeg4_decode_partition_a(s);
if(mb_num<0){ |
| 54974c62 |
ff_er_add_slice(&s->er, s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y, part_a_error); |
| ca334dd1 |
return -1;
}
if(s->resync_mb_x + s->resync_mb_y*s->mb_width + mb_num > s->mb_num){
av_log(s->avctx, AV_LOG_ERROR, "slice below monitor ...\n"); |
| 54974c62 |
ff_er_add_slice(&s->er, s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y, part_a_error); |
| ca334dd1 |
return -1;
}
s->mb_num_left= mb_num;
|
| ce5e49b0 |
if(s->pict_type==AV_PICTURE_TYPE_I){ |
| ca334dd1 |
while(show_bits(&s->gb, 9) == 1)
skip_bits(&s->gb, 9);
if(get_bits_long(&s->gb, 19)!=DC_MARKER){
av_log(s->avctx, AV_LOG_ERROR, "marker missing after first I partition at %d %d\n", s->mb_x, s->mb_y);
return -1;
}
}else{
while(show_bits(&s->gb, 10) == 1)
skip_bits(&s->gb, 10);
if(get_bits(&s->gb, 17)!=MOTION_MARKER){
av_log(s->avctx, AV_LOG_ERROR, "marker missing after first P partition at %d %d\n", s->mb_x, s->mb_y);
return -1;
}
} |
| 54974c62 |
ff_er_add_slice(&s->er, s->resync_mb_x, s->resync_mb_y, s->mb_x-1, s->mb_y, part_a_end); |
| ca334dd1 |
if( mpeg4_decode_partition_b(s, mb_num) < 0){ |
| ce5e49b0 |
if(s->pict_type==AV_PICTURE_TYPE_P) |
| 54974c62 |
ff_er_add_slice(&s->er, s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y, ER_DC_ERROR); |
| ca334dd1 |
return -1;
}else{ |
| ce5e49b0 |
if(s->pict_type==AV_PICTURE_TYPE_P) |
| 54974c62 |
ff_er_add_slice(&s->er, s->resync_mb_x, s->resync_mb_y, s->mb_x-1, s->mb_y, ER_DC_END); |
| ca334dd1 |
}
return 0;
}
/** |
| 58c42af7 |
* Decode a block. |
| ca334dd1 |
* @return <0 if an error occurred
*/ |
| 88bd7fdc |
static inline int mpeg4_decode_block(MpegEncContext * s, int16_t * block, |
| ca334dd1 |
int n, int coded, int intra, int rvlc)
{
int level, i, last, run; |
| d48ebfbd |
int av_uninit(dc_pred_dir); |
| ca334dd1 |
RLTable * rl;
RL_VLC_ELEM * rl_vlc;
const uint8_t * scan_table;
int qmul, qadd;
//Note intra & rvlc should be optimized away if this is inlined
if(intra) {
if(s->use_intra_dc_vlc){
/* DC coef */
if(s->partitioned_frame){
level = s->dc_val[0][ s->block_index[n] ];
if(n<4) level= FASTDIV((level + (s->y_dc_scale>>1)), s->y_dc_scale);
else level= FASTDIV((level + (s->c_dc_scale>>1)), s->c_dc_scale);
dc_pred_dir= (s->pred_dir_table[s->mb_x + s->mb_y*s->mb_stride]<<n)&32;
}else{
level = mpeg4_decode_dc(s, n, &dc_pred_dir);
if (level < 0)
return -1;
}
block[0] = level;
i = 0;
}else{
i = -1;
ff_mpeg4_pred_dc(s, n, 0, &dc_pred_dir, 0);
}
if (!coded)
goto not_coded;
if(rvlc){ |
| 6f13a371 |
rl = &ff_rvlc_rl_intra;
rl_vlc = ff_rvlc_rl_intra.rl_vlc[0]; |
| ca334dd1 |
}else{ |
| fef59a5b |
rl = &ff_mpeg4_rl_intra;
rl_vlc = ff_mpeg4_rl_intra.rl_vlc[0]; |
| ca334dd1 |
}
if (s->ac_pred) {
if (dc_pred_dir == 0)
scan_table = s->intra_v_scantable.permutated; /* left */
else
scan_table = s->intra_h_scantable.permutated; /* top */
} else {
scan_table = s->intra_scantable.permutated;
}
qmul=1;
qadd=0;
} else {
i = -1;
if (!coded) {
s->block_last_index[n] = i;
return 0;
} |
| 6f13a371 |
if(rvlc) rl = &ff_rvlc_rl_inter; |
| 101ada9a |
else rl = &ff_h263_rl_inter; |
| ca334dd1 |
scan_table = s->intra_scantable.permutated;
if(s->mpeg_quant){
qmul=1;
qadd=0;
if(rvlc){ |
| 6f13a371 |
rl_vlc = ff_rvlc_rl_inter.rl_vlc[0]; |
| ca334dd1 |
}else{ |
| 101ada9a |
rl_vlc = ff_h263_rl_inter.rl_vlc[0]; |
| ca334dd1 |
}
}else{
qmul = s->qscale << 1;
qadd = (s->qscale - 1) | 1;
if(rvlc){ |
| 6f13a371 |
rl_vlc = ff_rvlc_rl_inter.rl_vlc[s->qscale]; |
| ca334dd1 |
}else{ |
| 101ada9a |
rl_vlc = ff_h263_rl_inter.rl_vlc[s->qscale]; |
| ca334dd1 |
}
}
}
{
OPEN_READER(re, &s->gb);
for(;;) {
UPDATE_CACHE(re, &s->gb);
GET_RL_VLC(level, run, re, &s->gb, rl_vlc, TEX_VLC_BITS, 2, 0);
if (level==0) {
/* escape */
if(rvlc){
if(SHOW_UBITS(re, &s->gb, 1)==0){
av_log(s->avctx, AV_LOG_ERROR, "1. marker bit missing in rvlc esc\n");
return -1;
}; SKIP_CACHE(re, &s->gb, 1);
last= SHOW_UBITS(re, &s->gb, 1); SKIP_CACHE(re, &s->gb, 1); |
| 86a10281 |
run= SHOW_UBITS(re, &s->gb, 6); |
| ca334dd1 |
SKIP_COUNTER(re, &s->gb, 1+1+6);
UPDATE_CACHE(re, &s->gb);
if(SHOW_UBITS(re, &s->gb, 1)==0){
av_log(s->avctx, AV_LOG_ERROR, "2. marker bit missing in rvlc esc\n");
return -1;
}; SKIP_CACHE(re, &s->gb, 1);
level= SHOW_UBITS(re, &s->gb, 11); SKIP_CACHE(re, &s->gb, 11);
if(SHOW_UBITS(re, &s->gb, 5)!=0x10){
av_log(s->avctx, AV_LOG_ERROR, "reverse esc missing\n");
return -1;
}; SKIP_CACHE(re, &s->gb, 5);
level= level * qmul + qadd; |
| 86a10281 |
level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1); |
| ca334dd1 |
SKIP_COUNTER(re, &s->gb, 1+11+5+1);
i+= run + 1;
if(last) i+=192;
}else{
int cache;
cache= GET_CACHE(re, &s->gb);
if(IS_3IV1)
cache ^= 0xC0000000;
if (cache&0x80000000) {
if (cache&0x40000000) {
/* third escape */
SKIP_CACHE(re, &s->gb, 2);
last= SHOW_UBITS(re, &s->gb, 1); SKIP_CACHE(re, &s->gb, 1); |
| 86a10281 |
run= SHOW_UBITS(re, &s->gb, 6); |
| ca334dd1 |
SKIP_COUNTER(re, &s->gb, 2+1+6);
UPDATE_CACHE(re, &s->gb);
if(IS_3IV1){
level= SHOW_SBITS(re, &s->gb, 12); LAST_SKIP_BITS(re, &s->gb, 12);
}else{
if(SHOW_UBITS(re, &s->gb, 1)==0){
av_log(s->avctx, AV_LOG_ERROR, "1. marker bit missing in 3. esc\n");
return -1;
}; SKIP_CACHE(re, &s->gb, 1);
level= SHOW_SBITS(re, &s->gb, 12); SKIP_CACHE(re, &s->gb, 12);
if(SHOW_UBITS(re, &s->gb, 1)==0){
av_log(s->avctx, AV_LOG_ERROR, "2. marker bit missing in 3. esc\n");
return -1; |
| 86a10281 |
} |
| ca334dd1 |
SKIP_COUNTER(re, &s->gb, 1+12+1);
}
#if 0
if(s->error_recognition >= FF_ER_COMPLIANT){
const int abs_level= FFABS(level);
if(abs_level<=MAX_LEVEL && run<=MAX_RUN){
const int run1= run - rl->max_run[last][abs_level] - 1;
if(abs_level <= rl->max_level[last][run]){
av_log(s->avctx, AV_LOG_ERROR, "illegal 3. esc, vlc encoding possible\n");
return -1;
}
if(s->error_recognition > FF_ER_COMPLIANT){
if(abs_level <= rl->max_level[last][run]*2){
av_log(s->avctx, AV_LOG_ERROR, "illegal 3. esc, esc 1 encoding possible\n");
return -1;
}
if(run1 >= 0 && abs_level <= rl->max_level[last][run1]){
av_log(s->avctx, AV_LOG_ERROR, "illegal 3. esc, esc 2 encoding possible\n");
return -1;
}
}
}
}
#endif
if (level>0) level= level * qmul + qadd;
else level= level * qmul - qadd;
if((unsigned)(level + 2048) > 4095){ |
| c9cab022 |
if(s->err_recognition & (AV_EF_BITSTREAM|AV_EF_AGGRESSIVE)){ |
| ca334dd1 |
if(level > 2560 || level<-2560){
av_log(s->avctx, AV_LOG_ERROR, "|level| overflow in 3. esc, qp=%d\n", s->qscale);
return -1;
}
}
level= level<0 ? -2048 : 2047;
}
i+= run + 1;
if(last) i+=192;
} else {
/* second escape */
SKIP_BITS(re, &s->gb, 2);
GET_RL_VLC(level, run, re, &s->gb, rl_vlc, TEX_VLC_BITS, 2, 1);
i+= run + rl->max_run[run>>7][level/qmul] +1; //FIXME opt indexing
level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
LAST_SKIP_BITS(re, &s->gb, 1);
}
} else {
/* first escape */
SKIP_BITS(re, &s->gb, 1);
GET_RL_VLC(level, run, re, &s->gb, rl_vlc, TEX_VLC_BITS, 2, 1);
i+= run;
level = level + rl->max_level[run>>7][(run-1)&63] * qmul;//FIXME opt indexing
level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
LAST_SKIP_BITS(re, &s->gb, 1);
}
}
} else {
i+= run;
level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
LAST_SKIP_BITS(re, &s->gb, 1);
}
if (i > 62){
i-= 192;
if(i&(~63)){
av_log(s->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n", s->mb_x, s->mb_y);
return -1;
}
block[scan_table[i]] = level;
break;
}
block[scan_table[i]] = level;
}
CLOSE_READER(re, &s->gb);
}
not_coded:
if (intra) {
if(!s->use_intra_dc_vlc){
block[0] = ff_mpeg4_pred_dc(s, n, block[0], &dc_pred_dir, 0);
i -= i>>31; //if(i == -1) i=0;
}
|
| 6f13a371 |
ff_mpeg4_pred_ac(s, block, n, dc_pred_dir); |
| ca334dd1 |
if (s->ac_pred) {
i = 63; /* XXX: not optimal */
}
}
s->block_last_index[n] = i;
return 0;
}
/**
* decode partition C of one MB.
* @return <0 if an error occurred
*/ |
| 88bd7fdc |
static int mpeg4_decode_partitioned_mb(MpegEncContext *s, int16_t block[6][64]) |
| ca334dd1 |
{
int cbp, mb_type;
const int xy= s->mb_x + s->mb_y*s->mb_stride;
|
| 657ccb5a |
mb_type = s->current_picture.f.mb_type[xy]; |
| ca334dd1 |
cbp = s->cbp_table[xy];
s->use_intra_dc_vlc= s->qscale < s->intra_dc_threshold;
|
| 657ccb5a |
if (s->current_picture.f.qscale_table[xy] != s->qscale) {
ff_set_qscale(s, s->current_picture.f.qscale_table[xy]); |
| ca334dd1 |
}
|
| ce5e49b0 |
if (s->pict_type == AV_PICTURE_TYPE_P || s->pict_type==AV_PICTURE_TYPE_S) { |
| ca334dd1 |
int i;
for(i=0; i<4; i++){ |
| 657ccb5a |
s->mv[0][i][0] = s->current_picture.f.motion_val[0][s->block_index[i]][0];
s->mv[0][i][1] = s->current_picture.f.motion_val[0][s->block_index[i]][1]; |
| ca334dd1 |
}
s->mb_intra = IS_INTRA(mb_type);
if (IS_SKIP(mb_type)) {
/* skip mb */
for(i=0;i<6;i++)
s->block_last_index[i] = -1;
s->mv_dir = MV_DIR_FORWARD;
s->mv_type = MV_TYPE_16X16; |
| ce5e49b0 |
if(s->pict_type==AV_PICTURE_TYPE_S && s->vol_sprite_usage==GMC_SPRITE){ |
| ca334dd1 |
s->mcsel=1;
s->mb_skipped = 0;
}else{
s->mcsel=0;
s->mb_skipped = 1;
}
}else if(s->mb_intra){ |
| 657ccb5a |
s->ac_pred = IS_ACPRED(s->current_picture.f.mb_type[xy]); |
| ca334dd1 |
}else if(!s->mb_intra){
// s->mcsel= 0; //FIXME do we need to init that
s->mv_dir = MV_DIR_FORWARD;
if (IS_8X8(mb_type)) {
s->mv_type = MV_TYPE_8X8;
} else {
s->mv_type = MV_TYPE_16X16;
}
}
} else { /* I-Frame */
s->mb_intra = 1; |
| 657ccb5a |
s->ac_pred = IS_ACPRED(s->current_picture.f.mb_type[xy]); |
| ca334dd1 |
}
if (!IS_SKIP(mb_type)) {
int i;
s->dsp.clear_blocks(s->block[0]);
/* decode each block */
for (i = 0; i < 6; i++) {
if(mpeg4_decode_block(s, block[i], i, cbp&32, s->mb_intra, s->rvlc) < 0){
av_log(s->avctx, AV_LOG_ERROR, "texture corrupted at %d %d %d\n", s->mb_x, s->mb_y, s->mb_intra);
return -1;
}
cbp+=cbp;
}
}
/* per-MB end of slice check */
if(--s->mb_num_left <= 0){
if(mpeg4_is_resync(s))
return SLICE_END;
else
return SLICE_NOEND;
}else{
if(mpeg4_is_resync(s)){
const int delta= s->mb_x + 1 == s->mb_width ? 2 : 1;
if(s->cbp_table[xy+delta])
return SLICE_END;
}
return SLICE_OK;
}
}
static int mpeg4_decode_mb(MpegEncContext *s, |
| 88bd7fdc |
int16_t block[6][64]) |
| ca334dd1 |
{
int cbpc, cbpy, i, cbp, pred_x, pred_y, mx, my, dquant;
int16_t *mot_val;
static int8_t quant_tab[4] = { -1, -2, 1, 2 };
const int xy= s->mb_x + s->mb_y * s->mb_stride;
|
| 43c60937 |
av_assert2(s->h263_pred); |
| ca334dd1 |
|
| ce5e49b0 |
if (s->pict_type == AV_PICTURE_TYPE_P || s->pict_type==AV_PICTURE_TYPE_S) { |
| ca334dd1 |
do{
if (get_bits1(&s->gb)) {
/* skip mb */
s->mb_intra = 0;
for(i=0;i<6;i++)
s->block_last_index[i] = -1;
s->mv_dir = MV_DIR_FORWARD;
s->mv_type = MV_TYPE_16X16; |
| ce5e49b0 |
if(s->pict_type==AV_PICTURE_TYPE_S && s->vol_sprite_usage==GMC_SPRITE){ |
| 657ccb5a |
s->current_picture.f.mb_type[xy] = MB_TYPE_SKIP | MB_TYPE_GMC | MB_TYPE_16x16 | MB_TYPE_L0; |
| ca334dd1 |
s->mcsel=1;
s->mv[0][0][0]= get_amv(s, 0);
s->mv[0][0][1]= get_amv(s, 1);
s->mb_skipped = 0;
}else{ |
| 657ccb5a |
s->current_picture.f.mb_type[xy] = MB_TYPE_SKIP | MB_TYPE_16x16 | MB_TYPE_L0; |
| ca334dd1 |
s->mcsel=0;
s->mv[0][0][0] = 0;
s->mv[0][0][1] = 0;
s->mb_skipped = 1;
}
goto end;
} |
| 101ada9a |
cbpc = get_vlc2(&s->gb, ff_h263_inter_MCBPC_vlc.table, INTER_MCBPC_VLC_BITS, 2); |
| ca334dd1 |
if (cbpc < 0){
av_log(s->avctx, AV_LOG_ERROR, "cbpc damaged at %d %d\n", s->mb_x, s->mb_y);
return -1;
}
}while(cbpc == 20);
s->dsp.clear_blocks(s->block[0]);
dquant = cbpc & 8;
s->mb_intra = ((cbpc & 4) != 0);
if (s->mb_intra) goto intra;
|
| ce5e49b0 |
if(s->pict_type==AV_PICTURE_TYPE_S && s->vol_sprite_usage==GMC_SPRITE && (cbpc & 16) == 0) |
| ca334dd1 |
s->mcsel= get_bits1(&s->gb);
else s->mcsel= 0; |
| 101ada9a |
cbpy = get_vlc2(&s->gb, ff_h263_cbpy_vlc.table, CBPY_VLC_BITS, 1) ^ 0x0F; |
| ca334dd1 |
cbp = (cbpc & 3) | (cbpy << 2);
if (dquant) {
ff_set_qscale(s, s->qscale + quant_tab[get_bits(&s->gb, 2)]);
}
if((!s->progressive_sequence) && (cbp || (s->workaround_bugs&FF_BUG_XVID_ILACE)))
s->interlaced_dct= get_bits1(&s->gb);
s->mv_dir = MV_DIR_FORWARD;
if ((cbpc & 16) == 0) {
if(s->mcsel){ |
| 657ccb5a |
s->current_picture.f.mb_type[xy] = MB_TYPE_GMC | MB_TYPE_16x16 | MB_TYPE_L0; |
| ca334dd1 |
/* 16x16 global motion prediction */
s->mv_type = MV_TYPE_16X16;
mx= get_amv(s, 0);
my= get_amv(s, 1);
s->mv[0][0][0] = mx;
s->mv[0][0][1] = my;
}else if((!s->progressive_sequence) && get_bits1(&s->gb)){ |
| 657ccb5a |
s->current_picture.f.mb_type[xy] = MB_TYPE_16x8 | MB_TYPE_L0 | MB_TYPE_INTERLACED; |
| ca334dd1 |
/* 16x8 field motion prediction */
s->mv_type= MV_TYPE_FIELD;
s->field_select[0][0]= get_bits1(&s->gb);
s->field_select[0][1]= get_bits1(&s->gb);
|
| ddce8953 |
ff_h263_pred_motion(s, 0, 0, &pred_x, &pred_y); |
| ca334dd1 |
for(i=0; i<2; i++){ |
| ddce8953 |
mx = ff_h263_decode_motion(s, pred_x, s->f_code); |
| ca334dd1 |
if (mx >= 0xffff)
return -1;
|
| ddce8953 |
my = ff_h263_decode_motion(s, pred_y/2, s->f_code); |
| ca334dd1 |
if (my >= 0xffff)
return -1;
s->mv[0][i][0] = mx;
s->mv[0][i][1] = my;
}
}else{ |
| 657ccb5a |
s->current_picture.f.mb_type[xy] = MB_TYPE_16x16 | MB_TYPE_L0; |
| ca334dd1 |
/* 16x16 motion prediction */
s->mv_type = MV_TYPE_16X16; |
| ddce8953 |
ff_h263_pred_motion(s, 0, 0, &pred_x, &pred_y);
mx = ff_h263_decode_motion(s, pred_x, s->f_code); |
| ca334dd1 |
if (mx >= 0xffff)
return -1;
|
| ddce8953 |
my = ff_h263_decode_motion(s, pred_y, s->f_code); |
| ca334dd1 |
if (my >= 0xffff)
return -1;
s->mv[0][0][0] = mx;
s->mv[0][0][1] = my;
}
} else { |
| 657ccb5a |
s->current_picture.f.mb_type[xy] = MB_TYPE_8x8 | MB_TYPE_L0; |
| ca334dd1 |
s->mv_type = MV_TYPE_8X8;
for(i=0;i<4;i++) { |
| ddce8953 |
mot_val = ff_h263_pred_motion(s, i, 0, &pred_x, &pred_y);
mx = ff_h263_decode_motion(s, pred_x, s->f_code); |
| ca334dd1 |
if (mx >= 0xffff)
return -1;
|
| ddce8953 |
my = ff_h263_decode_motion(s, pred_y, s->f_code); |
| ca334dd1 |
if (my >= 0xffff)
return -1;
s->mv[0][i][0] = mx;
s->mv[0][i][1] = my;
mot_val[0] = mx;
mot_val[1] = my;
}
} |
| ce5e49b0 |
} else if(s->pict_type==AV_PICTURE_TYPE_B) { |
| ca334dd1 |
int modb1; // first bit of modb
int modb2; // second bit of modb
int mb_type;
s->mb_intra = 0; //B-frames never contain intra blocks
s->mcsel=0; // ... true gmc blocks
if(s->mb_x==0){
for(i=0; i<2; i++){
s->last_mv[i][0][0]=
s->last_mv[i][0][1]=
s->last_mv[i][1][0]=
s->last_mv[i][1][1]= 0;
} |
| d375c104 |
|
| 47c0ac96 |
ff_thread_await_progress(&s->next_picture_ptr->f, s->mb_y, 0); |
| ca334dd1 |
}
/* if we skipped it in the future P Frame than skip it now too */ |
| 657ccb5a |
s->mb_skipped = s->next_picture.f.mbskip_table[s->mb_y * s->mb_stride + s->mb_x]; // Note, skiptab=0 if last was GMC |
| ca334dd1 |
if(s->mb_skipped){
/* skip mb */
for(i=0;i<6;i++)
s->block_last_index[i] = -1;
s->mv_dir = MV_DIR_FORWARD;
s->mv_type = MV_TYPE_16X16;
s->mv[0][0][0] = 0;
s->mv[0][0][1] = 0;
s->mv[1][0][0] = 0;
s->mv[1][0][1] = 0; |
| 657ccb5a |
s->current_picture.f.mb_type[xy] = MB_TYPE_SKIP | MB_TYPE_16x16 | MB_TYPE_L0; |
| ca334dd1 |
goto end;
}
modb1= get_bits1(&s->gb);
if(modb1){
mb_type= MB_TYPE_DIRECT2 | MB_TYPE_SKIP | MB_TYPE_L0L1; //like MB_TYPE_B_DIRECT but no vectors coded
cbp=0;
}else{
modb2= get_bits1(&s->gb);
mb_type= get_vlc2(&s->gb, mb_type_b_vlc.table, MB_TYPE_B_VLC_BITS, 1);
if(mb_type<0){
av_log(s->avctx, AV_LOG_ERROR, "illegal MB_type\n");
return -1;
}
mb_type= mb_type_b_map[ mb_type ];
if(modb2) cbp= 0;
else{
s->dsp.clear_blocks(s->block[0]);
cbp= get_bits(&s->gb, 6);
}
if ((!IS_DIRECT(mb_type)) && cbp) {
if(get_bits1(&s->gb)){
ff_set_qscale(s, s->qscale + get_bits1(&s->gb)*4 - 2);
}
}
if(!s->progressive_sequence){
if(cbp)
s->interlaced_dct= get_bits1(&s->gb);
if(!IS_DIRECT(mb_type) && get_bits1(&s->gb)){
mb_type |= MB_TYPE_16x8 | MB_TYPE_INTERLACED;
mb_type &= ~MB_TYPE_16x16;
if(USES_LIST(mb_type, 0)){
s->field_select[0][0]= get_bits1(&s->gb);
s->field_select[0][1]= get_bits1(&s->gb);
}
if(USES_LIST(mb_type, 1)){
s->field_select[1][0]= get_bits1(&s->gb);
s->field_select[1][1]= get_bits1(&s->gb);
}
}
}
s->mv_dir = 0;
if((mb_type & (MB_TYPE_DIRECT2|MB_TYPE_INTERLACED)) == 0){
s->mv_type= MV_TYPE_16X16;
if(USES_LIST(mb_type, 0)){
s->mv_dir = MV_DIR_FORWARD;
|
| ddce8953 |
mx = ff_h263_decode_motion(s, s->last_mv[0][0][0], s->f_code);
my = ff_h263_decode_motion(s, s->last_mv[0][0][1], s->f_code); |
| ca334dd1 |
s->last_mv[0][1][0]= s->last_mv[0][0][0]= s->mv[0][0][0] = mx;
s->last_mv[0][1][1]= s->last_mv[0][0][1]= s->mv[0][0][1] = my;
}
if(USES_LIST(mb_type, 1)){
s->mv_dir |= MV_DIR_BACKWARD;
|
| ddce8953 |
mx = ff_h263_decode_motion(s, s->last_mv[1][0][0], s->b_code);
my = ff_h263_decode_motion(s, s->last_mv[1][0][1], s->b_code); |
| ca334dd1 |
s->last_mv[1][1][0]= s->last_mv[1][0][0]= s->mv[1][0][0] = mx;
s->last_mv[1][1][1]= s->last_mv[1][0][1]= s->mv[1][0][1] = my;
}
}else if(!IS_DIRECT(mb_type)){
s->mv_type= MV_TYPE_FIELD;
if(USES_LIST(mb_type, 0)){
s->mv_dir = MV_DIR_FORWARD;
for(i=0; i<2; i++){ |
| ddce8953 |
mx = ff_h263_decode_motion(s, s->last_mv[0][i][0] , s->f_code);
my = ff_h263_decode_motion(s, s->last_mv[0][i][1]/2, s->f_code); |
| ca334dd1 |
s->last_mv[0][i][0]= s->mv[0][i][0] = mx;
s->last_mv[0][i][1]= (s->mv[0][i][1] = my)*2;
}
}
if(USES_LIST(mb_type, 1)){
s->mv_dir |= MV_DIR_BACKWARD;
for(i=0; i<2; i++){ |
| ddce8953 |
mx = ff_h263_decode_motion(s, s->last_mv[1][i][0] , s->b_code);
my = ff_h263_decode_motion(s, s->last_mv[1][i][1]/2, s->b_code); |
| ca334dd1 |
s->last_mv[1][i][0]= s->mv[1][i][0] = mx;
s->last_mv[1][i][1]= (s->mv[1][i][1] = my)*2;
}
}
}
}
if(IS_DIRECT(mb_type)){
if(IS_SKIP(mb_type))
mx=my=0;
else{ |
| ddce8953 |
mx = ff_h263_decode_motion(s, 0, 1);
my = ff_h263_decode_motion(s, 0, 1); |
| ca334dd1 |
}
s->mv_dir = MV_DIR_FORWARD | MV_DIR_BACKWARD | MV_DIRECT;
mb_type |= ff_mpeg4_set_direct_mv(s, mx, my);
} |
| 657ccb5a |
s->current_picture.f.mb_type[xy] = mb_type; |
| ca334dd1 |
} else { /* I-Frame */
do{ |
| 101ada9a |
cbpc = get_vlc2(&s->gb, ff_h263_intra_MCBPC_vlc.table, INTRA_MCBPC_VLC_BITS, 2); |
| ca334dd1 |
if (cbpc < 0){
av_log(s->avctx, AV_LOG_ERROR, "I cbpc damaged at %d %d\n", s->mb_x, s->mb_y);
return -1;
}
}while(cbpc == 8);
dquant = cbpc & 4;
s->mb_intra = 1;
intra:
s->ac_pred = get_bits1(&s->gb);
if(s->ac_pred) |
| 657ccb5a |
s->current_picture.f.mb_type[xy] = MB_TYPE_INTRA | MB_TYPE_ACPRED; |
| ca334dd1 |
else |
| 657ccb5a |
s->current_picture.f.mb_type[xy] = MB_TYPE_INTRA; |
| ca334dd1 |
|
| 101ada9a |
cbpy = get_vlc2(&s->gb, ff_h263_cbpy_vlc.table, CBPY_VLC_BITS, 1); |
| ca334dd1 |
if(cbpy<0){
av_log(s->avctx, AV_LOG_ERROR, "I cbpy damaged at %d %d\n", s->mb_x, s->mb_y);
return -1;
}
cbp = (cbpc & 3) | (cbpy << 2);
s->use_intra_dc_vlc= s->qscale < s->intra_dc_threshold;
if (dquant) {
ff_set_qscale(s, s->qscale + quant_tab[get_bits(&s->gb, 2)]);
}
if(!s->progressive_sequence)
s->interlaced_dct= get_bits1(&s->gb);
s->dsp.clear_blocks(s->block[0]);
/* decode each block */
for (i = 0; i < 6; i++) {
if (mpeg4_decode_block(s, block[i], i, cbp&32, 1, 0) < 0)
return -1;
cbp+=cbp;
}
goto end;
}
/* decode each block */
for (i = 0; i < 6; i++) {
if (mpeg4_decode_block(s, block[i], i, cbp&32, 0, 0) < 0)
return -1;
cbp+=cbp;
}
end:
/* per-MB end of slice check */ |
| 36ef5369 |
if(s->codec_id==AV_CODEC_ID_MPEG4){ |
| 78a041a9 |
int next= mpeg4_is_resync(s);
if(next) { |
| e37f161e |
if (s->mb_x + s->mb_y*s->mb_width + 1 > next && (s->avctx->err_recognition & AV_EF_AGGRESSIVE)) { |
| 78a041a9 |
return -1;
} else if (s->mb_x + s->mb_y*s->mb_width + 1 >= next)
return SLICE_END; |
| fe0ac337 |
if(s->pict_type==AV_PICTURE_TYPE_B){
const int delta= s->mb_x + 1 == s->mb_width ? 2 : 1; |
| 47c0ac96 |
ff_thread_await_progress(&s->next_picture_ptr->f, |
| fe0ac337 |
(s->mb_x + delta >= s->mb_width) ? FFMIN(s->mb_y+1, s->mb_height-1) : s->mb_y, 0);
if (s->next_picture.f.mbskip_table[xy + delta])
return SLICE_OK;
}
return SLICE_END; |
| ca334dd1 |
}
}
return SLICE_OK;
}
static int mpeg4_decode_gop_header(MpegEncContext * s, GetBitContext *gb){
int hours, minutes, seconds;
|
| 499c2d41 |
if(!show_bits(gb, 23)){ |
| 2034ba08 |
av_log(s->avctx, AV_LOG_WARNING, "GOP header invalid\n");
return -1;
}
|
| ca334dd1 |
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;
}
|
| 0637e505 |
static int mpeg4_decode_profile_level(MpegEncContext * s, GetBitContext *gb){
|
| 9e4ed295 |
s->avctx->profile = get_bits(gb, 4);
s->avctx->level = get_bits(gb, 4); |
| 0637e505 |
|
| 9e4ed295 |
// for Simple profile, level 0
if (s->avctx->profile == 0 && s->avctx->level == 8) {
s->avctx->level = 0;
} |
| 0637e505 |
|
| 9e4ed295 |
return 0; |
| 0637e505 |
}
|
| ca334dd1 |
static int decode_vol_header(MpegEncContext *s, GetBitContext *gb){
int width, height, vo_ver_id;
/* vol header */
skip_bits(gb, 1); /* random access */
s->vo_type= get_bits(gb, 8);
if (get_bits1(gb) != 0) { /* is_ol_id */
vo_ver_id = get_bits(gb, 4); /* vo_ver_id */
skip_bits(gb, 3); /* vo_priority */
} else {
vo_ver_id = 1;
}
s->aspect_ratio_info= get_bits(gb, 4);
if(s->aspect_ratio_info == FF_ASPECT_EXTENDED){
s->avctx->sample_aspect_ratio.num= get_bits(gb, 8); // par_width
s->avctx->sample_aspect_ratio.den= get_bits(gb, 8); // par_height
}else{
s->avctx->sample_aspect_ratio= ff_h263_pixel_aspect[s->aspect_ratio_info];
}
if ((s->vol_control_parameters=get_bits1(gb))) { /* vol control parameter */
int chroma_format= get_bits(gb, 2);
if(chroma_format!=CHROMA_420){
av_log(s->avctx, AV_LOG_ERROR, "illegal chroma format\n");
}
s->low_delay= get_bits1(gb);
if(get_bits1(gb)){ /* vbv parameters */
get_bits(gb, 15); /* first_half_bitrate */
skip_bits1(gb); /* marker */
get_bits(gb, 15); /* latter_half_bitrate */
skip_bits1(gb); /* marker */
get_bits(gb, 15); /* first_half_vbv_buffer_size */
skip_bits1(gb); /* marker */
get_bits(gb, 3); /* latter_half_vbv_buffer_size */
get_bits(gb, 11); /* first_half_vbv_occupancy */
skip_bits1(gb); /* marker */
get_bits(gb, 15); /* latter_half_vbv_occupancy */
skip_bits1(gb); /* marker */
}
}else{ |
| 6851130f |
// set low delay flag only once the smartest? low delay detection won't be overridden |
| ca334dd1 |
if(s->picture_number==0)
s->low_delay=0;
}
s->shape = get_bits(gb, 2); /* vol shape */
if(s->shape != RECT_SHAPE) av_log(s->avctx, AV_LOG_ERROR, "only rectangular vol supported\n");
if(s->shape == GRAY_SHAPE && vo_ver_id != 1){
av_log(s->avctx, AV_LOG_ERROR, "Gray shape not supported\n");
skip_bits(gb, 4); //video_object_layer_shape_extension
}
check_marker(gb, "before time_increment_resolution");
s->avctx->time_base.den = get_bits(gb, 16);
if(!s->avctx->time_base.den){
av_log(s->avctx, AV_LOG_ERROR, "time_base.den==0\n"); |
| 4f18f1b0 |
s->avctx->time_base.num = 0; |
| ca334dd1 |
return -1;
}
s->time_increment_bits = av_log2(s->avctx->time_base.den - 1) + 1;
if (s->time_increment_bits < 1)
s->time_increment_bits = 1;
check_marker(gb, "before fixed_vop_rate");
if (get_bits1(gb) != 0) { /* fixed_vop_rate */
s->avctx->time_base.num = get_bits(gb, s->time_increment_bits);
}else
s->avctx->time_base.num = 1;
s->t_frame=0;
if (s->shape != BIN_ONLY_SHAPE) {
if (s->shape == RECT_SHAPE) {
skip_bits1(gb); /* marker */
width = get_bits(gb, 13);
skip_bits1(gb); /* marker */
height = get_bits(gb, 13);
skip_bits1(gb); /* marker */
if(width && height && !(s->width && s->codec_tag == AV_RL32("MP4S"))){ /* they should be non zero but who knows ... */ |
| 8701f4f8 |
if (s->width && s->height &&
(s->width != width || s->height != height))
s->context_reinit = 1; |
| ca334dd1 |
s->width = width;
s->height = height;
}
}
s->progressive_sequence=
s->progressive_frame= get_bits1(gb)^1;
s->interlaced_dct=0;
if(!get_bits1(gb) && (s->avctx->debug & FF_DEBUG_PICT_INFO))
av_log(s->avctx, AV_LOG_INFO, "MPEG4 OBMC not supported (very likely buggy encoder)\n"); /* OBMC Disable */
if (vo_ver_id == 1) {
s->vol_sprite_usage = get_bits1(gb); /* vol_sprite_usage */
} else {
s->vol_sprite_usage = get_bits(gb, 2); /* vol_sprite_usage */
}
if(s->vol_sprite_usage==STATIC_SPRITE) av_log(s->avctx, AV_LOG_ERROR, "Static Sprites not supported\n");
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(gb, 13);
skip_bits1(gb); /* marker */
s->sprite_height= get_bits(gb, 13);
skip_bits1(gb); /* marker */
s->sprite_left = get_bits(gb, 13);
skip_bits1(gb); /* marker */
s->sprite_top = get_bits(gb, 13);
skip_bits1(gb); /* marker */
}
s->num_sprite_warping_points= get_bits(gb, 6);
if(s->num_sprite_warping_points > 3){
av_log(s->avctx, AV_LOG_ERROR, "%d sprite_warping_points\n", s->num_sprite_warping_points);
s->num_sprite_warping_points= 0;
return -1;
}
s->sprite_warping_accuracy = get_bits(gb, 2);
s->sprite_brightness_change= get_bits1(gb);
if(s->vol_sprite_usage==STATIC_SPRITE)
s->low_latency_sprite= get_bits1(gb);
}
// FIXME sadct disable bit if verid!=1 && shape not rect
if (get_bits1(gb) == 1) { /* not_8_bit */
s->quant_precision = get_bits(gb, 4); /* quant_precision */
if(get_bits(gb, 4)!=8) av_log(s->avctx, AV_LOG_ERROR, "N-bit not supported\n"); /* bits_per_pixel */
if(s->quant_precision!=5) av_log(s->avctx, AV_LOG_ERROR, "quant precision %d\n", s->quant_precision); |
| 50ec8a2a |
if(s->quant_precision<3 || s->quant_precision>9) {
s->quant_precision = 5;
} |
| ca334dd1 |
} else {
s->quant_precision = 5;
}
// FIXME a bunch of grayscale shape things
if((s->mpeg_quant=get_bits1(gb))){ /* vol_quant_type */
int i, v;
/* load default matrixes */
for(i=0; i<64; i++){
int j= s->dsp.idct_permutation[i];
v= ff_mpeg4_default_intra_matrix[i];
s->intra_matrix[j]= v;
s->chroma_intra_matrix[j]= v;
v= ff_mpeg4_default_non_intra_matrix[i];
s->inter_matrix[j]= v;
s->chroma_inter_matrix[j]= v;
}
/* load custom intra matrix */
if(get_bits1(gb)){
int last=0;
for(i=0; i<64; i++){
int j;
v= get_bits(gb, 8);
if(v==0) break;
last= v;
j= s->dsp.idct_permutation[ ff_zigzag_direct[i] ];
s->intra_matrix[j]= v;
s->chroma_intra_matrix[j]= v;
}
/* replicate last value */
for(; i<64; i++){
int j= s->dsp.idct_permutation[ ff_zigzag_direct[i] ];
s->intra_matrix[j]= last;
s->chroma_intra_matrix[j]= last;
}
}
/* load custom non intra matrix */
if(get_bits1(gb)){
int last=0;
for(i=0; i<64; i++){
int j;
v= get_bits(gb, 8);
if(v==0) break;
last= v;
j= s->dsp.idct_permutation[ ff_zigzag_direct[i] ];
s->inter_matrix[j]= v;
s->chroma_inter_matrix[j]= v;
}
/* replicate last value */
for(; i<64; i++){
int j= s->dsp.idct_permutation[ ff_zigzag_direct[i] ];
s->inter_matrix[j]= last;
s->chroma_inter_matrix[j]= last;
}
}
// FIXME a bunch of grayscale shape things
}
if(vo_ver_id != 1)
s->quarter_sample= get_bits1(gb);
else s->quarter_sample=0;
if(!get_bits1(gb)){
int pos= get_bits_count(gb);
int estimation_method= get_bits(gb, 2);
if(estimation_method<2){
if(!get_bits1(gb)){
s->cplx_estimation_trash_i += 8*get_bits1(gb); //opaque
s->cplx_estimation_trash_i += 8*get_bits1(gb); //transparent
s->cplx_estimation_trash_i += 8*get_bits1(gb); //intra_cae
s->cplx_estimation_trash_i += 8*get_bits1(gb); //inter_cae
s->cplx_estimation_trash_i += 8*get_bits1(gb); //no_update
s->cplx_estimation_trash_i += 8*get_bits1(gb); //upampling
}
if(!get_bits1(gb)){
s->cplx_estimation_trash_i += 8*get_bits1(gb); //intra_blocks
s->cplx_estimation_trash_p += 8*get_bits1(gb); //inter_blocks
s->cplx_estimation_trash_p += 8*get_bits1(gb); //inter4v_blocks
s->cplx_estimation_trash_i += 8*get_bits1(gb); //not coded blocks
}
if(!check_marker(gb, "in complexity estimation part 1")){
skip_bits_long(gb, pos - get_bits_count(gb));
goto no_cplx_est;
}
if(!get_bits1(gb)){
s->cplx_estimation_trash_i += 8*get_bits1(gb); //dct_coeffs
s->cplx_estimation_trash_i += 8*get_bits1(gb); //dct_lines
s->cplx_estimation_trash_i += 8*get_bits1(gb); //vlc_syms
s->cplx_estimation_trash_i += 4*get_bits1(gb); //vlc_bits
}
if(!get_bits1(gb)){
s->cplx_estimation_trash_p += 8*get_bits1(gb); //apm
s->cplx_estimation_trash_p += 8*get_bits1(gb); //npm
s->cplx_estimation_trash_b += 8*get_bits1(gb); //interpolate_mc_q
s->cplx_estimation_trash_p += 8*get_bits1(gb); //forwback_mc_q
s->cplx_estimation_trash_p += 8*get_bits1(gb); //halfpel2
s->cplx_estimation_trash_p += 8*get_bits1(gb); //halfpel4
}
if(!check_marker(gb, "in complexity estimation part 2")){
skip_bits_long(gb, pos - get_bits_count(gb));
goto no_cplx_est;
}
if(estimation_method==1){
s->cplx_estimation_trash_i += 8*get_bits1(gb); //sadct
s->cplx_estimation_trash_p += 8*get_bits1(gb); //qpel
}
}else
av_log(s->avctx, AV_LOG_ERROR, "Invalid Complexity estimation method %d\n", estimation_method);
}else{
no_cplx_est:
s->cplx_estimation_trash_i=
s->cplx_estimation_trash_p=
s->cplx_estimation_trash_b= 0;
}
s->resync_marker= !get_bits1(gb); /* resync_marker_disabled */
s->data_partitioning= get_bits1(gb);
if(s->data_partitioning){
s->rvlc= get_bits1(gb);
}
if(vo_ver_id != 1) {
s->new_pred= get_bits1(gb);
if(s->new_pred){
av_log(s->avctx, AV_LOG_ERROR, "new pred not supported\n");
skip_bits(gb, 2); /* requested upstream message type */
skip_bits1(gb); /* newpred segment type */
}
s->reduced_res_vop= get_bits1(gb);
if(s->reduced_res_vop) av_log(s->avctx, AV_LOG_ERROR, "reduced resolution VOP not supported\n");
}
else{
s->new_pred=0;
s->reduced_res_vop= 0;
}
s->scalability= get_bits1(gb);
if (s->scalability) {
GetBitContext bak= *gb;
int h_sampling_factor_n;
int h_sampling_factor_m;
int v_sampling_factor_n;
int v_sampling_factor_m;
s->hierachy_type= get_bits1(gb); |
| e65ab9d9 |
skip_bits(gb, 4); /* ref_layer_id */
skip_bits1(gb); /* ref_layer_sampling_dir */ |
| ca334dd1 |
h_sampling_factor_n= get_bits(gb, 5);
h_sampling_factor_m= get_bits(gb, 5);
v_sampling_factor_n= get_bits(gb, 5);
v_sampling_factor_m= get_bits(gb, 5);
s->enhancement_type= get_bits1(gb);
if( h_sampling_factor_n==0 || h_sampling_factor_m==0
|| v_sampling_factor_n==0 || v_sampling_factor_m==0){
/* illegal scalability header (VERY broken encoder),
* trying to workaround */
s->scalability=0;
*gb= bak;
}else
av_log(s->avctx, AV_LOG_ERROR, "scalability not supported\n");
// bin shape stuff FIXME
}
} |
| 307562be |
if(s->avctx->debug&FF_DEBUG_PICT_INFO) { |
| 7f5fae1e |
av_log(s->avctx, AV_LOG_DEBUG, "tb %d/%d, tincrbits:%d, qp_prec:%d, ps:%d, %s%s%s%s\n", |
| 307562be |
s->avctx->time_base.num, s->avctx->time_base.den,
s->time_increment_bits,
s->quant_precision,
s->progressive_sequence,
s->scalability ? "scalability " :"" , s->quarter_sample ? "qpel " : "",
s->data_partitioning ? "partition " : "", s->rvlc ? "rvlc " : ""
);
}
|
| ca334dd1 |
return 0;
}
/** |
| 58c42af7 |
* Decode the user data stuff in the header. |
| ca334dd1 |
* Also initializes divx/xvid/lavc_version/build.
*/
static int decode_user_data(MpegEncContext *s, GetBitContext *gb){
char buf[256];
int i;
int e;
int ver = 0, build = 0, ver2 = 0, ver3 = 0;
char last;
for(i=0; i<255 && get_bits_count(gb) < gb->size_in_bits; i++){
if(show_bits(gb, 23) == 0) break;
buf[i]= get_bits(gb, 8);
}
buf[i]=0;
/* divx detection */
e=sscanf(buf, "DivX%dBuild%d%c", &ver, &build, &last);
if(e<2)
e=sscanf(buf, "DivX%db%d%c", &ver, &build, &last);
if(e>=2){
s->divx_version= ver;
s->divx_build= build;
s->divx_packed= e==3 && last=='p';
if(s->divx_packed && !s->showed_packed_warning) {
av_log(s->avctx, AV_LOG_WARNING, "Invalid and inefficient vfw-avi packed B frames detected\n");
s->showed_packed_warning=1;
}
}
|
| 2f5df0b1 |
/* libavcodec detection */ |
| ca334dd1 |
e=sscanf(buf, "FFmpe%*[^b]b%d", &build)+3;
if(e!=4)
e=sscanf(buf, "FFmpeg v%d.%d.%d / libavcodec build: %d", &ver, &ver2, &ver3, &build);
if(e!=4){
e=sscanf(buf, "Lavc%d.%d.%d", &ver, &ver2, &ver3)+1;
if (e>1)
build= (ver<<16) + (ver2<<8) + ver3;
}
if(e!=4){
if(strcmp(buf, "ffmpeg")==0){
s->lavc_build= 4600;
}
}
if(e==4){
s->lavc_build= build;
}
/* Xvid detection */
e=sscanf(buf, "XviD%d", &build);
if(e==1){
s->xvid_build= build;
}
return 0;
}
static int decode_vop_header(MpegEncContext *s, GetBitContext *gb){
int time_incr, time_increment;
|
| ce5e49b0 |
s->pict_type = get_bits(gb, 2) + AV_PICTURE_TYPE_I; /* pict type: I = 0 , P = 1 */
if(s->pict_type==AV_PICTURE_TYPE_B && s->low_delay && s->vol_control_parameters==0 && !(s->flags & CODEC_FLAG_LOW_DELAY)){ |
| ca334dd1 |
av_log(s->avctx, AV_LOG_ERROR, "low_delay flag incorrectly, clearing it\n");
s->low_delay=0;
}
|
| ce5e49b0 |
s->partitioned_frame= s->data_partitioning && s->pict_type!=AV_PICTURE_TYPE_B; |
| ca334dd1 |
if(s->partitioned_frame)
s->decode_mb= mpeg4_decode_partitioned_mb;
else
s->decode_mb= mpeg4_decode_mb;
time_incr=0;
while (get_bits1(gb) != 0)
time_incr++;
check_marker(gb, "before time_increment");
if(s->time_increment_bits==0 || !(show_bits(gb, s->time_increment_bits+1)&1)){
av_log(s->avctx, AV_LOG_ERROR, "hmm, seems the headers are not complete, trying to guess time_increment_bits\n");
for(s->time_increment_bits=1 ;s->time_increment_bits<16; s->time_increment_bits++){ |
| ce5e49b0 |
if ( s->pict_type == AV_PICTURE_TYPE_P
|| (s->pict_type == AV_PICTURE_TYPE_S && s->vol_sprite_usage==GMC_SPRITE)) { |
| ca334dd1 |
if((show_bits(gb, s->time_increment_bits+6)&0x37) == 0x30) break;
}else
if((show_bits(gb, s->time_increment_bits+5)&0x1F) == 0x18) break;
}
av_log(s->avctx, AV_LOG_ERROR, "my guess is %d bits ;)\n",s->time_increment_bits); |
| d3d715ff |
if (s->avctx->time_base.den && 4*s->avctx->time_base.den < 1<<s->time_increment_bits) {
s->avctx->time_base.den = 1<<s->time_increment_bits;
} |
| ca334dd1 |
}
if(IS_3IV1) time_increment= get_bits1(gb); //FIXME investigate further
else time_increment= get_bits(gb, s->time_increment_bits);
|
| ce5e49b0 |
if(s->pict_type!=AV_PICTURE_TYPE_B){ |
| ca334dd1 |
s->last_time_base= s->time_base;
s->time_base+= time_incr;
s->time= s->time_base*s->avctx->time_base.den + time_increment;
if(s->workaround_bugs&FF_BUG_UMP4){
if(s->time < s->last_non_b_time){
/* header is not mpeg-4-compatible, broken encoder,
* trying to workaround */
s->time_base++;
s->time+= s->avctx->time_base.den;
}
}
s->pp_time= s->time - s->last_non_b_time;
s->last_non_b_time= s->time;
}else{
s->time= (s->last_time_base + time_incr)*s->avctx->time_base.den + time_increment;
s->pb_time= s->pp_time - (s->last_non_b_time - s->time);
if(s->pp_time <=s->pb_time || s->pp_time <= s->pp_time - s->pb_time || s->pp_time<=0){
/* messed up order, maybe after seeking? skipping current b-frame */
return FRAME_SKIPPED;
}
ff_mpeg4_init_direct_mv(s);
if(s->t_frame==0) s->t_frame= s->pb_time;
if(s->t_frame==0) s->t_frame=1; // 1/0 protection
s->pp_field_time= ( ROUNDED_DIV(s->last_non_b_time, s->t_frame)
- ROUNDED_DIV(s->last_non_b_time - s->pp_time, s->t_frame))*2;
s->pb_field_time= ( ROUNDED_DIV(s->time, s->t_frame)
- ROUNDED_DIV(s->last_non_b_time - s->pp_time, s->t_frame))*2;
if(!s->progressive_sequence){
if(s->pp_field_time <= s->pb_field_time || s->pb_field_time <= 1)
return FRAME_SKIPPED;
}
}
if(s->avctx->time_base.num) |
| 89d52622 |
s->current_picture_ptr->f.pts = ROUNDED_DIV(s->time, s->avctx->time_base.num); |
| ca334dd1 |
else |
| 657ccb5a |
s->current_picture_ptr->f.pts = AV_NOPTS_VALUE; |
| ca334dd1 |
if(s->avctx->debug&FF_DEBUG_PTS) |
| 657ccb5a |
av_log(s->avctx, AV_LOG_DEBUG, "MPEG4 PTS: %"PRId64"\n",
s->current_picture_ptr->f.pts); |
| ca334dd1 |
check_marker(gb, "before vop_coded");
/* vop coded */
if (get_bits1(gb) != 1){
if(s->avctx->debug&FF_DEBUG_PICT_INFO)
av_log(s->avctx, AV_LOG_ERROR, "vop not coded\n");
return FRAME_SKIPPED;
} |
| ce5e49b0 |
if (s->shape != BIN_ONLY_SHAPE && ( s->pict_type == AV_PICTURE_TYPE_P
|| (s->pict_type == AV_PICTURE_TYPE_S && s->vol_sprite_usage==GMC_SPRITE))) { |
| ca334dd1 |
/* rounding type for motion estimation */
s->no_rounding = get_bits1(gb);
} else {
s->no_rounding = 0;
}
//FIXME reduced res stuff
if (s->shape != RECT_SHAPE) { |
| ce5e49b0 |
if (s->vol_sprite_usage != 1 || s->pict_type != AV_PICTURE_TYPE_I) { |
| e65ab9d9 |
skip_bits(gb, 13); /* width */ |
| ca334dd1 |
skip_bits1(gb); /* marker */ |
| e65ab9d9 |
skip_bits(gb, 13); /* height */ |
| ca334dd1 |
skip_bits1(gb); /* marker */ |
| e65ab9d9 |
skip_bits(gb, 13); /* hor_spat_ref */ |
| ca334dd1 |
skip_bits1(gb); /* marker */ |
| e65ab9d9 |
skip_bits(gb, 13); /* ver_spat_ref */ |
| ca334dd1 |
}
skip_bits1(gb); /* change_CR_disable */
if (get_bits1(gb) != 0) {
skip_bits(gb, 8); /* constant_alpha_value */
}
}
//FIXME complexity estimation stuff
if (s->shape != BIN_ONLY_SHAPE) {
skip_bits_long(gb, s->cplx_estimation_trash_i); |
| ce5e49b0 |
if(s->pict_type != AV_PICTURE_TYPE_I) |
| ca334dd1 |
skip_bits_long(gb, s->cplx_estimation_trash_p); |
| ce5e49b0 |
if(s->pict_type == AV_PICTURE_TYPE_B) |
| ca334dd1 |
skip_bits_long(gb, s->cplx_estimation_trash_b);
|
| b02cc2dd |
if(get_bits_left(gb) < 3) {
av_log(s->avctx, AV_LOG_ERROR, "Header truncated\n");
return -1;
} |
| 6f13a371 |
s->intra_dc_threshold= ff_mpeg4_dc_threshold[ get_bits(gb, 3) ]; |
| ca334dd1 |
if(!s->progressive_sequence){
s->top_field_first= get_bits1(gb);
s->alternate_scan= get_bits1(gb);
}else
s->alternate_scan= 0;
}
if(s->alternate_scan){
ff_init_scantable(s->dsp.idct_permutation, &s->inter_scantable , ff_alternate_vertical_scan);
ff_init_scantable(s->dsp.idct_permutation, &s->intra_scantable , ff_alternate_vertical_scan);
ff_init_scantable(s->dsp.idct_permutation, &s->intra_h_scantable, ff_alternate_vertical_scan);
ff_init_scantable(s->dsp.idct_permutation, &s->intra_v_scantable, ff_alternate_vertical_scan);
} else{
ff_init_scantable(s->dsp.idct_permutation, &s->inter_scantable , ff_zigzag_direct);
ff_init_scantable(s->dsp.idct_permutation, &s->intra_scantable , ff_zigzag_direct);
ff_init_scantable(s->dsp.idct_permutation, &s->intra_h_scantable, ff_alternate_horizontal_scan);
ff_init_scantable(s->dsp.idct_permutation, &s->intra_v_scantable, ff_alternate_vertical_scan);
}
|
| ce5e49b0 |
if(s->pict_type == AV_PICTURE_TYPE_S && (s->vol_sprite_usage==STATIC_SPRITE || s->vol_sprite_usage==GMC_SPRITE)){ |
| fc5c49ab |
if(mpeg4_decode_sprite_trajectory(s, gb) < 0)
return -1; |
| ca334dd1 |
if(s->sprite_brightness_change) av_log(s->avctx, AV_LOG_ERROR, "sprite_brightness_change not supported\n");
if(s->vol_sprite_usage==STATIC_SPRITE) av_log(s->avctx, AV_LOG_ERROR, "static sprite not supported\n");
}
if (s->shape != BIN_ONLY_SHAPE) {
s->chroma_qscale= s->qscale = get_bits(gb, s->quant_precision);
if(s->qscale==0){
av_log(s->avctx, AV_LOG_ERROR, "Error, header damaged or not MPEG4 header (qscale=0)\n");
return -1; // makes no sense to continue, as there is nothing left from the image then
}
|
| ce5e49b0 |
if (s->pict_type != AV_PICTURE_TYPE_I) { |
| ca334dd1 |
s->f_code = get_bits(gb, 3); /* fcode_for */
if(s->f_code==0){
av_log(s->avctx, AV_LOG_ERROR, "Error, header damaged or not MPEG4 header (f_code=0)\n"); |
| 6c249392 |
s->f_code=1; |
| ca334dd1 |
return -1; // makes no sense to continue, as the MV decoding will break very quickly
}
}else
s->f_code=1;
|
| ce5e49b0 |
if (s->pict_type == AV_PICTURE_TYPE_B) { |
| ca334dd1 |
s->b_code = get_bits(gb, 3); |
| 6c249392 |
if(s->b_code==0){
av_log(s->avctx, AV_LOG_ERROR, "Error, header damaged or not MPEG4 header (b_code=0)\n");
s->b_code=1;
return -1; // makes no sense to continue, as the MV decoding will break very quickly
} |
| ca334dd1 |
}else
s->b_code=1;
if(s->avctx->debug&FF_DEBUG_PICT_INFO){ |
| 34aa61a3 |
av_log(s->avctx, AV_LOG_DEBUG, "qp:%d fc:%d,%d %s size:%d pro:%d alt:%d top:%d %spel part:%d resync:%d w:%d a:%d rnd:%d vot:%d%s dc:%d ce:%d/%d/%d time:%"PRId64" tincr:%d\n", |
| ca334dd1 |
s->qscale, s->f_code, s->b_code, |
| ce5e49b0 |
s->pict_type == AV_PICTURE_TYPE_I ? "I" : (s->pict_type == AV_PICTURE_TYPE_P ? "P" : (s->pict_type == AV_PICTURE_TYPE_B ? "B" : "S")), |
| ca334dd1 |
gb->size_in_bits,s->progressive_sequence, s->alternate_scan, s->top_field_first,
s->quarter_sample ? "q" : "h", s->data_partitioning, s->resync_marker, s->num_sprite_warping_points, |
| 307562be |
s->sprite_warping_accuracy, 1-s->no_rounding, s->vo_type, s->vol_control_parameters ? " VOLC" : " ", s->intra_dc_threshold,
s->cplx_estimation_trash_i, s->cplx_estimation_trash_p, s->cplx_estimation_trash_b,
s->time,
time_increment
); |
| ca334dd1 |
}
if(!s->scalability){ |
| ce5e49b0 |
if (s->shape!=RECT_SHAPE && s->pict_type!=AV_PICTURE_TYPE_I) { |
| ca334dd1 |
skip_bits1(gb); // vop shape coding type
}
}else{
if(s->enhancement_type){
int load_backward_shape= get_bits1(gb);
if(load_backward_shape){
av_log(s->avctx, AV_LOG_ERROR, "load backward shape isn't supported\n");
}
}
skip_bits(gb, 2); //ref_select_code
}
}
/* detect buggy encoders which don't set the low_delay flag (divx4/xvid/opendivx)*/
// note we cannot detect divx5 without b-frames easily (although it's buggy too) |
| b317567c |
if(s->vo_type==0 && s->vol_control_parameters==0 && s->divx_version==-1 && s->picture_number==0){ |
| 3e2a4e91 |
av_log(s->avctx, AV_LOG_WARNING, "looks like this file was encoded with (divx4/(old)xvid/opendivx) -> forcing low_delay flag\n"); |
| ca334dd1 |
s->low_delay=1;
}
s->picture_number++; // better than pic number==0 always ;)
s->y_dc_scale_table= ff_mpeg4_y_dc_scale_table; //FIXME add short header support
s->c_dc_scale_table= ff_mpeg4_c_dc_scale_table;
if(s->workaround_bugs&FF_BUG_EDGE){
s->h_edge_pos= s->width;
s->v_edge_pos= s->height;
}
return 0;
}
/** |
| 58c42af7 |
* Decode mpeg4 headers. |
| ca334dd1 |
* @return <0 if no VOP found (or a damaged one)
* FRAME_SKIPPED if a not coded VOP is found
* 0 if a VOP is found
*/
int ff_mpeg4_decode_picture_header(MpegEncContext * s, GetBitContext *gb)
{ |
| 581810f5 |
unsigned startcode, v; |
| ca334dd1 |
/* search next start code */
align_get_bits(gb);
if(s->codec_tag == AV_RL32("WV1F") && show_bits(gb, 24) == 0x575630){
skip_bits(gb, 24);
if(get_bits(gb, 8) == 0xF0)
goto end;
}
startcode = 0xff;
for(;;) {
if(get_bits_count(gb) >= gb->size_in_bits){ |
| be4c9a44 |
if(gb->size_in_bits==8 && (s->divx_version>=0 || s->xvid_build>=0) || s->codec_tag == AV_RL32("QMP4")){ |
| fab5973f |
av_log(s->avctx, AV_LOG_VERBOSE, "frame skip %d\n", gb->size_in_bits); |
| ca334dd1 |
return FRAME_SKIPPED; //divx bug
}else
return -1; //end of stream
}
/* use the bits after the test */
v = get_bits(gb, 8);
startcode = ((startcode << 8) | v) & 0xffffffff;
if((startcode&0xFFFFFF00) != 0x100)
continue; //no startcode
if(s->avctx->debug&FF_DEBUG_STARTCODE){
av_log(s->avctx, AV_LOG_DEBUG, "startcode: %3X ", startcode);
if (startcode<=0x11F) av_log(s->avctx, AV_LOG_DEBUG, "Video Object Start");
else if(startcode<=0x12F) av_log(s->avctx, AV_LOG_DEBUG, "Video Object Layer Start");
else if(startcode<=0x13F) av_log(s->avctx, AV_LOG_DEBUG, "Reserved");
else if(startcode<=0x15F) av_log(s->avctx, AV_LOG_DEBUG, "FGS bp start");
else if(startcode<=0x1AF) av_log(s->avctx, AV_LOG_DEBUG, "Reserved");
else if(startcode==0x1B0) av_log(s->avctx, AV_LOG_DEBUG, "Visual Object Seq Start");
else if(startcode==0x1B1) av_log(s->avctx, AV_LOG_DEBUG, "Visual Object Seq End");
else if(startcode==0x1B2) av_log(s->avctx, AV_LOG_DEBUG, "User Data");
else if(startcode==0x1B3) av_log(s->avctx, AV_LOG_DEBUG, "Group of VOP start");
else if(startcode==0x1B4) av_log(s->avctx, AV_LOG_DEBUG, "Video Session Error");
else if(startcode==0x1B5) av_log(s->avctx, AV_LOG_DEBUG, "Visual Object Start");
else if(startcode==0x1B6) av_log(s->avctx, AV_LOG_DEBUG, "Video Object Plane start");
else if(startcode==0x1B7) av_log(s->avctx, AV_LOG_DEBUG, "slice start");
else if(startcode==0x1B8) av_log(s->avctx, AV_LOG_DEBUG, "extension start");
else if(startcode==0x1B9) av_log(s->avctx, AV_LOG_DEBUG, "fgs start");
else if(startcode==0x1BA) av_log(s->avctx, AV_LOG_DEBUG, "FBA Object start");
else if(startcode==0x1BB) av_log(s->avctx, AV_LOG_DEBUG, "FBA Object Plane start");
else if(startcode==0x1BC) av_log(s->avctx, AV_LOG_DEBUG, "Mesh Object start");
else if(startcode==0x1BD) av_log(s->avctx, AV_LOG_DEBUG, "Mesh Object Plane start");
else if(startcode==0x1BE) av_log(s->avctx, AV_LOG_DEBUG, "Still Texture Object start");
else if(startcode==0x1BF) av_log(s->avctx, AV_LOG_DEBUG, "Texture Spatial Layer start");
else if(startcode==0x1C0) av_log(s->avctx, AV_LOG_DEBUG, "Texture SNR Layer start");
else if(startcode==0x1C1) av_log(s->avctx, AV_LOG_DEBUG, "Texture Tile start");
else if(startcode==0x1C2) av_log(s->avctx, AV_LOG_DEBUG, "Texture Shape Layer start");
else if(startcode==0x1C3) av_log(s->avctx, AV_LOG_DEBUG, "stuffing start");
else if(startcode<=0x1C5) av_log(s->avctx, AV_LOG_DEBUG, "reserved");
else if(startcode<=0x1FF) av_log(s->avctx, AV_LOG_DEBUG, "System start");
av_log(s->avctx, AV_LOG_DEBUG, " at %d\n", get_bits_count(gb));
}
if(startcode >= 0x120 && startcode <= 0x12F){
if(decode_vol_header(s, gb) < 0)
return -1;
}
else if(startcode == USER_DATA_STARTCODE){
decode_user_data(s, gb);
}
else if(startcode == GOP_STARTCODE){
mpeg4_decode_gop_header(s, gb);
} |
| 0637e505 |
else if(startcode == VOS_STARTCODE){
mpeg4_decode_profile_level(s, gb);
} |
| ca334dd1 |
else if(startcode == VOP_STARTCODE){
break;
}
align_get_bits(gb);
startcode = 0xff;
}
end:
if(s->flags& CODEC_FLAG_LOW_DELAY)
s->low_delay=1;
s->avctx->has_b_frames= !s->low_delay;
return decode_vop_header(s, gb);
}
|
| 84281d11 |
av_cold void ff_mpeg4videodec_static_init(void) { |
| ca334dd1 |
static int done = 0;
if (!done) { |
| e96b4a53 |
ff_init_rl(&ff_mpeg4_rl_intra, ff_mpeg4_static_rl_table_store[0]); |
| 6f13a371 |
ff_init_rl(&ff_rvlc_rl_inter, ff_mpeg4_static_rl_table_store[1]);
ff_init_rl(&ff_rvlc_rl_intra, ff_mpeg4_static_rl_table_store[2]); |
| fef59a5b |
INIT_VLC_RL(ff_mpeg4_rl_intra, 554); |
| 6f13a371 |
INIT_VLC_RL(ff_rvlc_rl_inter, 1072);
INIT_VLC_RL(ff_rvlc_rl_intra, 1072); |
| ca334dd1 |
INIT_VLC_STATIC(&dc_lum, DC_VLC_BITS, 10 /* 13 */, |
| 05b858b0 |
&ff_mpeg4_DCtab_lum[0][1], 2, 1,
&ff_mpeg4_DCtab_lum[0][0], 2, 1, 512); |
| ca334dd1 |
INIT_VLC_STATIC(&dc_chrom, DC_VLC_BITS, 10 /* 13 */, |
| 05b858b0 |
&ff_mpeg4_DCtab_chrom[0][1], 2, 1,
&ff_mpeg4_DCtab_chrom[0][0], 2, 1, 512); |
| ca334dd1 |
INIT_VLC_STATIC(&sprite_trajectory, SPRITE_TRAJ_VLC_BITS, 15, |
| 6f13a371 |
&ff_sprite_trajectory_tab[0][1], 4, 2,
&ff_sprite_trajectory_tab[0][0], 4, 2, 128); |
| ca334dd1 |
INIT_VLC_STATIC(&mb_type_b_vlc, MB_TYPE_B_VLC_BITS, 4, |
| 6f13a371 |
&ff_mb_type_b_tab[0][1], 2, 1,
&ff_mb_type_b_tab[0][0], 2, 1, 16); |
| 1bd024ec |
done = 1; |
| ca334dd1 |
} |
| 1bd024ec |
}
static av_cold int decode_init(AVCodecContext *avctx)
{
MpegEncContext *s = avctx->priv_data;
int ret;
s->divx_version=
s->divx_build=
s->xvid_build=
s->lavc_build= -1;
if((ret=ff_h263_decode_init(avctx)) < 0)
return ret;
ff_mpeg4videodec_static_init(); |
| ca334dd1 |
s->h263_pred = 1; |
| 6851130f |
s->low_delay = 0; //default, might be overridden in the vol header during header parsing |
| ca334dd1 |
s->decode_mb= mpeg4_decode_mb;
s->time_increment_bits = 4; /* default value for broken headers */
avctx->chroma_sample_location = AVCHROMA_LOC_LEFT;
return 0;
}
|
| c4ab43ff |
static const AVProfile mpeg4_video_profiles[] = {
{ FF_PROFILE_MPEG4_SIMPLE, "Simple Profile" },
{ FF_PROFILE_MPEG4_SIMPLE_SCALABLE, "Simple Scalable Profile" },
{ FF_PROFILE_MPEG4_CORE, "Core Profile" },
{ FF_PROFILE_MPEG4_MAIN, "Main Profile" },
{ FF_PROFILE_MPEG4_N_BIT, "N-bit Profile" },
{ FF_PROFILE_MPEG4_SCALABLE_TEXTURE, "Scalable Texture Profile" },
{ FF_PROFILE_MPEG4_SIMPLE_FACE_ANIMATION, "Simple Face Animation Profile" },
{ FF_PROFILE_MPEG4_BASIC_ANIMATED_TEXTURE, "Basic Animated Texture Profile" },
{ FF_PROFILE_MPEG4_HYBRID, "Hybrid Profile" },
{ FF_PROFILE_MPEG4_ADVANCED_REAL_TIME, "Advanced Real Time Simple Profile" },
{ FF_PROFILE_MPEG4_CORE_SCALABLE, "Code Scalable Profile" },
{ FF_PROFILE_MPEG4_ADVANCED_CODING, "Advanced Coding Profile" },
{ FF_PROFILE_MPEG4_ADVANCED_CORE, "Advanced Core Profile" },
{ FF_PROFILE_MPEG4_ADVANCED_SCALABLE_TEXTURE, "Advanced Scalable Texture Profile" },
{ FF_PROFILE_MPEG4_SIMPLE_STUDIO, "Simple Studio Profile" },
{ FF_PROFILE_MPEG4_ADVANCED_SIMPLE, "Advanced Simple Profile" }, |
| a10f71c1 |
{ FF_PROFILE_UNKNOWN }, |
| c4ab43ff |
};
|
| f51e5015 |
static const AVOption mpeg4_options[] = { |
| c6c560de |
{"quarter_sample", "1/4 subpel MC", offsetof(MpegEncContext, quarter_sample), FF_OPT_TYPE_INT, {.i64 = 0}, 0, 1, 0},
{"divx_packed", "divx style packed b frames", offsetof(MpegEncContext, divx_packed), FF_OPT_TYPE_INT, {.i64 = 0}, 0, 1, 0}, |
| f51e5015 |
{NULL}
};
static const AVClass mpeg4_class = {
"MPEG4 Video Decoder",
av_default_item_name,
mpeg4_options,
LIBAVUTIL_VERSION_INT,
};
static const AVClass mpeg4_vdpau_class = {
"MPEG4 Video VDPAU Decoder",
av_default_item_name,
mpeg4_options,
LIBAVUTIL_VERSION_INT,
};
|
| e7e2df27 |
AVCodec ff_mpeg4_decoder = { |
| 00c3b67b |
.name = "mpeg4",
.type = AVMEDIA_TYPE_VIDEO, |
| 36ef5369 |
.id = AV_CODEC_ID_MPEG4, |
| 00c3b67b |
.priv_data_size = sizeof(MpegEncContext),
.init = decode_init,
.close = ff_h263_decode_end,
.decode = ff_h263_decode_frame,
.capabilities = CODEC_CAP_DRAW_HORIZ_BAND | CODEC_CAP_DR1 |
CODEC_CAP_TRUNCATED | CODEC_CAP_DELAY |
CODEC_CAP_FRAME_THREADS,
.flush = ff_mpeg_flush, |
| 5e50a572 |
.max_lowres = 3, |
| 00c3b67b |
.long_name = NULL_IF_CONFIG_SMALL("MPEG-4 part 2"), |
| e2789d3e |
.pix_fmts = ff_h263_hwaccel_pixfmt_list_420, |
| 00c3b67b |
.profiles = NULL_IF_CONFIG_SMALL(mpeg4_video_profiles),
.update_thread_context = ONLY_IF_THREADS_ENABLED(ff_mpeg_update_thread_context), |
| f51e5015 |
.priv_class = &mpeg4_class, |
| ca334dd1 |
};
#if CONFIG_MPEG4_VDPAU_DECODER |
| e7e2df27 |
AVCodec ff_mpeg4_vdpau_decoder = { |
| ec6402b7 |
.name = "mpeg4_vdpau",
.type = AVMEDIA_TYPE_VIDEO, |
| 36ef5369 |
.id = AV_CODEC_ID_MPEG4, |
| ec6402b7 |
.priv_data_size = sizeof(MpegEncContext),
.init = decode_init,
.close = ff_h263_decode_end,
.decode = ff_h263_decode_frame, |
| 00c3b67b |
.capabilities = CODEC_CAP_DR1 | CODEC_CAP_TRUNCATED | CODEC_CAP_DELAY |
CODEC_CAP_HWACCEL_VDPAU,
.long_name = NULL_IF_CONFIG_SMALL("MPEG-4 part 2 (VDPAU)"), |
| 716d413c |
.pix_fmts = (const enum AVPixelFormat[]){ AV_PIX_FMT_VDPAU_MPEG4,
AV_PIX_FMT_NONE }, |
| 6101e532 |
.priv_class = &mpeg4_vdpau_class, |
| ca334dd1 |
};
#endif |