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authorTim Redfern <tim@eclectronics.org>2013-09-05 17:55:35 +0100
committerTim Redfern <tim@eclectronics.org>2013-09-05 17:55:35 +0100
commit741fb4b9e135cfb161a749db88713229038577bb (patch)
tree08bc9925659cbcac45162bacf31dc6336d4f60b4 /ffmpeg1/libavcodec/mpeg4videodec.c
parenta2e1bf3495b7bfefdaedb8fc737e969ab06df079 (diff)
making act segmenter
Diffstat (limited to 'ffmpeg1/libavcodec/mpeg4videodec.c')
-rw-r--r--ffmpeg1/libavcodec/mpeg4videodec.c2389
1 files changed, 0 insertions, 2389 deletions
diff --git a/ffmpeg1/libavcodec/mpeg4videodec.c b/ffmpeg1/libavcodec/mpeg4videodec.c
deleted file mode 100644
index be4aa37..0000000
--- a/ffmpeg1/libavcodec/mpeg4videodec.c
+++ /dev/null
@@ -1,2389 +0,0 @@
-/*
- * 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
- */
-
-#define UNCHECKED_BITSTREAM_READER 1
-
-#include "libavutil/opt.h"
-#include "error_resilience.h"
-#include "internal.h"
-#include "mpegvideo.h"
-#include "mpeg4video.h"
-#include "h263.h"
-#include "thread.h"
-
-// 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,
-};
-
-/**
- * Predict the ac.
- * @param n block index (0-3 are luma, 4-5 are chroma)
- * @param dir the ac prediction direction
- */
-void ff_mpeg4_pred_ac(MpegEncContext * s, int16_t *block, int n,
- int dir)
-{
- int i;
- int16_t *ac_val, *ac_val1;
- int8_t * const qscale_table = s->current_picture.qscale_table;
-
- /* 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);
-
- if(s->workaround_bugs&FF_BUG_NO_PADDING && !s->resync_marker){
- return 0;
- }
-
- while(v<=0xFF){
- if(s->pict_type==AV_PICTURE_TYPE_B || (v>>(8-s->pict_type)!=1) || s->partitioned_frame)
- 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)
- return s->mb_num;
- }else{
- if(v == ff_mpeg4_resync_prefix[bits_count&7]){
- int len, mb_num;
- int mb_num_bits= av_log2(s->mb_num - 1) + 1;
- 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;
- }
-
- 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;
-
- s->gb= gb;
-
- if(len>=ff_mpeg4_get_video_packet_prefix_length(s))
- return mb_num;
- }
- }
- return 0;
-}
-
-static int mpeg4_decode_sprite_trajectory(MpegEncContext * s, GetBitContext *gb)
-{
- 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;
-
- if(w<=0 || h<=0)
- return -1;
-
- 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;
- }
- return 0;
-}
-
-/**
- * Decode the next video packet.
- * @return <0 if something went wrong
- */
-int ff_mpeg4_decode_video_packet_header(MpegEncContext *s)
-{
- 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");
- skip_bits(&s->gb, s->time_increment_bits); /* time_increment */
- 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
- if(s->pict_type == AV_PICTURE_TYPE_S && s->vol_sprite_usage==GMC_SPRITE){
- if(mpeg4_decode_sprite_trajectory(s, &s->gb) < 0)
- return -1;
- av_log(s->avctx, AV_LOG_ERROR, "untested\n");
- }
-
- //FIXME reduced res stuff here
-
- if (s->pict_type != AV_PICTURE_TYPE_I) {
- 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");
- }
- }
- if (s->pict_type == AV_PICTURE_TYPE_B) {
- 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;
-}
-
-/**
- * Get the average motion vector for a GMC MB.
- * @param n either 0 for the x component or 1 for y
- * @return the average MV for a GMC MB
- */
-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;
-}
-
-/**
- * Decode the dc value.
- * @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 */
- if(s->err_recognition&(AV_EF_BITSTREAM|AV_EF_COMPLIANT)){
- 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);
-}
-
-/**
- * Decode first partition.
- * @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;
-
- if(s->pict_type==AV_PICTURE_TYPE_I){
- int i;
-
- do{
- if(show_bits_long(&s->gb, 19)==DC_MARKER){
- return mb_num-1;
- }
-
- cbpc = get_vlc2(&s->gb, ff_h263_intra_MCBPC_vlc.table, INTRA_MCBPC_VLC_BITS, 2);
- 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;
- s->current_picture.mb_type[xy] = MB_TYPE_INTRA;
- s->mb_intra = 1;
-
- if(cbpc & 4) {
- ff_set_qscale(s, s->qscale + quant_tab[get_bits(&s->gb, 2)]);
- }
- s->current_picture.qscale_table[xy]= s->qscale;
-
- 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;
- int16_t * const mot_val = s->current_picture.motion_val[0][s->block_index[0]];
- 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 */
- if(s->pict_type==AV_PICTURE_TYPE_S && s->vol_sprite_usage==GMC_SPRITE){
- s->current_picture.mb_type[xy] = MB_TYPE_SKIP | MB_TYPE_16x16 | MB_TYPE_GMC | MB_TYPE_L0;
- mx= get_amv(s, 0);
- my= get_amv(s, 1);
- }else{
- s->current_picture.mb_type[xy] = MB_TYPE_SKIP | MB_TYPE_16x16 | MB_TYPE_L0;
- 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;
- }
-
- cbpc = get_vlc2(&s->gb, ff_h263_inter_MCBPC_vlc.table, INTER_MCBPC_VLC_BITS, 2);
- 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){
- s->current_picture.mb_type[xy] = MB_TYPE_INTRA;
- 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);
-
- if(s->pict_type==AV_PICTURE_TYPE_S && s->vol_sprite_usage==GMC_SPRITE && (cbpc & 16) == 0)
- s->mcsel= get_bits1(&s->gb);
- else s->mcsel= 0;
-
- if ((cbpc & 16) == 0) {
- /* 16x16 motion prediction */
-
- ff_h263_pred_motion(s, 0, 0, &pred_x, &pred_y);
- if(!s->mcsel){
- mx = ff_h263_decode_motion(s, pred_x, s->f_code);
- if (mx >= 0xffff)
- return -1;
-
- my = ff_h263_decode_motion(s, pred_y, s->f_code);
- if (my >= 0xffff)
- return -1;
- s->current_picture.mb_type[xy] = MB_TYPE_16x16 | MB_TYPE_L0;
- } else {
- mx = get_amv(s, 0);
- my = get_amv(s, 1);
- s->current_picture.mb_type[xy] = MB_TYPE_16x16 | MB_TYPE_GMC | MB_TYPE_L0;
- }
-
- 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;
- s->current_picture.mb_type[xy] = MB_TYPE_8x8 | MB_TYPE_L0;
- for(i=0;i<4;i++) {
- 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);
- if (mx >= 0xffff)
- return -1;
-
- my = ff_h263_decode_motion(s, pred_y, s->f_code);
- 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;
-
- if(s->pict_type==AV_PICTURE_TYPE_I){
- int ac_pred= get_bits1(&s->gb);
- int cbpy = get_vlc2(&s->gb, ff_h263_cbpy_vlc.table, CBPY_VLC_BITS, 1);
- 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;
- s->current_picture.mb_type[xy] |= ac_pred*MB_TYPE_ACPRED;
- }else{ /* P || S_TYPE */
- if (IS_INTRA(s->current_picture.mb_type[xy])) {
- int dir=0,i;
- int ac_pred = get_bits1(&s->gb);
- int cbpy = get_vlc2(&s->gb, ff_h263_cbpy_vlc.table, CBPY_VLC_BITS, 1);
-
- 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)]);
- }
- s->current_picture.qscale_table[xy] = s->qscale;
-
- 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;
- s->current_picture.mb_type[xy] |= ac_pred*MB_TYPE_ACPRED;
- s->pred_dir_table[xy]= dir;
- } else if (IS_SKIP(s->current_picture.mb_type[xy])) {
- s->current_picture.qscale_table[xy] = s->qscale;
- s->cbp_table[xy]= 0;
- }else{
- int cbpy = get_vlc2(&s->gb, ff_h263_cbpy_vlc.table, CBPY_VLC_BITS, 1);
-
- 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)]);
- }
- s->current_picture.qscale_table[xy] = s->qscale;
-
- 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;
-}
-
-/**
- * Decode the first and second partition.
- * @return <0 if error (and sets error type in the error_status_table)
- */
-int ff_mpeg4_decode_partitions(MpegEncContext *s)
-{
- int mb_num;
- 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;
-
- mb_num= mpeg4_decode_partition_a(s);
- if(mb_num<0){
- ff_er_add_slice(&s->er, s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y, part_a_error);
- 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");
- ff_er_add_slice(&s->er, s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y, part_a_error);
- return -1;
- }
-
- s->mb_num_left= mb_num;
-
- if(s->pict_type==AV_PICTURE_TYPE_I){
- 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;
- }
- }
- ff_er_add_slice(&s->er, s->resync_mb_x, s->resync_mb_y, s->mb_x-1, s->mb_y, part_a_end);
-
- if( mpeg4_decode_partition_b(s, mb_num) < 0){
- if(s->pict_type==AV_PICTURE_TYPE_P)
- ff_er_add_slice(&s->er, s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y, ER_DC_ERROR);
- return -1;
- }else{
- if(s->pict_type==AV_PICTURE_TYPE_P)
- ff_er_add_slice(&s->er, s->resync_mb_x, s->resync_mb_y, s->mb_x-1, s->mb_y, ER_DC_END);
- }
-
- return 0;
-}
-
-/**
- * Decode a block.
- * @return <0 if an error occurred
- */
-static inline int mpeg4_decode_block(MpegEncContext * s, int16_t * block,
- int n, int coded, int intra, int rvlc)
-{
- int level, i, last, run;
- int av_uninit(dc_pred_dir);
- 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){
- rl = &ff_rvlc_rl_intra;
- rl_vlc = ff_rvlc_rl_intra.rl_vlc[0];
- }else{
- rl = &ff_mpeg4_rl_intra;
- rl_vlc = ff_mpeg4_rl_intra.rl_vlc[0];
- }
- 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;
- }
- if(rvlc) rl = &ff_rvlc_rl_inter;
- else rl = &ff_h263_rl_inter;
-
- scan_table = s->intra_scantable.permutated;
-
- if(s->mpeg_quant){
- qmul=1;
- qadd=0;
- if(rvlc){
- rl_vlc = ff_rvlc_rl_inter.rl_vlc[0];
- }else{
- rl_vlc = ff_h263_rl_inter.rl_vlc[0];
- }
- }else{
- qmul = s->qscale << 1;
- qadd = (s->qscale - 1) | 1;
- if(rvlc){
- rl_vlc = ff_rvlc_rl_inter.rl_vlc[s->qscale];
- }else{
- rl_vlc = ff_h263_rl_inter.rl_vlc[s->qscale];
- }
- }
- }
- {
- 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);
- run= SHOW_UBITS(re, &s->gb, 6);
- 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;
- level = (level ^ SHOW_SBITS(re, &s->gb, 1)) - SHOW_SBITS(re, &s->gb, 1);
- 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);
- run= SHOW_UBITS(re, &s->gb, 6);
- 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;
- }
-
- 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){
- if(s->err_recognition & (AV_EF_BITSTREAM|AV_EF_AGGRESSIVE)){
- 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;
- }
-
- ff_mpeg4_pred_ac(s, block, n, dc_pred_dir);
- 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
- */
-static int mpeg4_decode_partitioned_mb(MpegEncContext *s, int16_t block[6][64])
-{
- int cbp, mb_type;
- const int xy= s->mb_x + s->mb_y*s->mb_stride;
-
- mb_type = s->current_picture.mb_type[xy];
- cbp = s->cbp_table[xy];
-
- s->use_intra_dc_vlc= s->qscale < s->intra_dc_threshold;
-
- if (s->current_picture.qscale_table[xy] != s->qscale) {
- ff_set_qscale(s, s->current_picture.qscale_table[xy]);
- }
-
- if (s->pict_type == AV_PICTURE_TYPE_P || s->pict_type==AV_PICTURE_TYPE_S) {
- int i;
- for(i=0; i<4; i++){
- s->mv[0][i][0] = s->current_picture.motion_val[0][s->block_index[i]][0];
- s->mv[0][i][1] = s->current_picture.motion_val[0][s->block_index[i]][1];
- }
- 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;
- if(s->pict_type==AV_PICTURE_TYPE_S && s->vol_sprite_usage==GMC_SPRITE){
- s->mcsel=1;
- s->mb_skipped = 0;
- }else{
- s->mcsel=0;
- s->mb_skipped = 1;
- }
- }else if(s->mb_intra){
- s->ac_pred = IS_ACPRED(s->current_picture.mb_type[xy]);
- }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;
- s->ac_pred = IS_ACPRED(s->current_picture.mb_type[xy]);
- }
-
- 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,
- int16_t block[6][64])
-{
- 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;
-
- av_assert2(s->h263_pred);
-
- if (s->pict_type == AV_PICTURE_TYPE_P || s->pict_type==AV_PICTURE_TYPE_S) {
- 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;
- if(s->pict_type==AV_PICTURE_TYPE_S && s->vol_sprite_usage==GMC_SPRITE){
- s->current_picture.mb_type[xy] = MB_TYPE_SKIP | MB_TYPE_GMC | MB_TYPE_16x16 | MB_TYPE_L0;
- 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{
- s->current_picture.mb_type[xy] = MB_TYPE_SKIP | MB_TYPE_16x16 | MB_TYPE_L0;
- s->mcsel=0;
- s->mv[0][0][0] = 0;
- s->mv[0][0][1] = 0;
- s->mb_skipped = 1;
- }
- goto end;
- }
- cbpc = get_vlc2(&s->gb, ff_h263_inter_MCBPC_vlc.table, INTER_MCBPC_VLC_BITS, 2);
- 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;
-
- if(s->pict_type==AV_PICTURE_TYPE_S && s->vol_sprite_usage==GMC_SPRITE && (cbpc & 16) == 0)
- s->mcsel= get_bits1(&s->gb);
- else s->mcsel= 0;
- cbpy = get_vlc2(&s->gb, ff_h263_cbpy_vlc.table, CBPY_VLC_BITS, 1) ^ 0x0F;
-
- 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){
- s->current_picture.mb_type[xy] = MB_TYPE_GMC | MB_TYPE_16x16 | MB_TYPE_L0;
- /* 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)){
- s->current_picture.mb_type[xy] = MB_TYPE_16x8 | MB_TYPE_L0 | MB_TYPE_INTERLACED;
- /* 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);
-
- ff_h263_pred_motion(s, 0, 0, &pred_x, &pred_y);
-
- for(i=0; i<2; i++){
- mx = ff_h263_decode_motion(s, pred_x, s->f_code);
- if (mx >= 0xffff)
- return -1;
-
- my = ff_h263_decode_motion(s, pred_y/2, s->f_code);
- if (my >= 0xffff)
- return -1;
-
- s->mv[0][i][0] = mx;
- s->mv[0][i][1] = my;
- }
- }else{
- s->current_picture.mb_type[xy] = MB_TYPE_16x16 | MB_TYPE_L0;
- /* 16x16 motion prediction */
- s->mv_type = MV_TYPE_16X16;
- ff_h263_pred_motion(s, 0, 0, &pred_x, &pred_y);
- mx = ff_h263_decode_motion(s, pred_x, s->f_code);
-
- if (mx >= 0xffff)
- return -1;
-
- my = ff_h263_decode_motion(s, pred_y, s->f_code);
-
- if (my >= 0xffff)
- return -1;
- s->mv[0][0][0] = mx;
- s->mv[0][0][1] = my;
- }
- } else {
- s->current_picture.mb_type[xy] = MB_TYPE_8x8 | MB_TYPE_L0;
- s->mv_type = MV_TYPE_8X8;
- for(i=0;i<4;i++) {
- mot_val = ff_h263_pred_motion(s, i, 0, &pred_x, &pred_y);
- mx = ff_h263_decode_motion(s, pred_x, s->f_code);
- if (mx >= 0xffff)
- return -1;
-
- my = ff_h263_decode_motion(s, pred_y, s->f_code);
- 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;
- }
- }
- } else if(s->pict_type==AV_PICTURE_TYPE_B) {
- 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;
- }
-
- ff_thread_await_progress(&s->next_picture_ptr->tf, s->mb_y, 0);
- }
-
- /* if we skipped it in the future P Frame than skip it now too */
- s->mb_skipped = s->next_picture.mbskip_table[s->mb_y * s->mb_stride + s->mb_x]; // Note, skiptab=0 if last was GMC
-
- 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;
- s->current_picture.mb_type[xy] = MB_TYPE_SKIP | MB_TYPE_16x16 | MB_TYPE_L0;
- 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;
-
- 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);
- 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;
-
- 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);
- 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++){
- 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);
- 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++){
- 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);
- 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{
- mx = ff_h263_decode_motion(s, 0, 1);
- my = ff_h263_decode_motion(s, 0, 1);
- }
-
- s->mv_dir = MV_DIR_FORWARD | MV_DIR_BACKWARD | MV_DIRECT;
- mb_type |= ff_mpeg4_set_direct_mv(s, mx, my);
- }
- s->current_picture.mb_type[xy] = mb_type;
- } else { /* I-Frame */
- do{
- cbpc = get_vlc2(&s->gb, ff_h263_intra_MCBPC_vlc.table, INTRA_MCBPC_VLC_BITS, 2);
- 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)
- s->current_picture.mb_type[xy] = MB_TYPE_INTRA | MB_TYPE_ACPRED;
- else
- s->current_picture.mb_type[xy] = MB_TYPE_INTRA;
-
- cbpy = get_vlc2(&s->gb, ff_h263_cbpy_vlc.table, CBPY_VLC_BITS, 1);
- 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 */
- if(s->codec_id==AV_CODEC_ID_MPEG4){
- int next= mpeg4_is_resync(s);
- if(next) {
- if (s->mb_x + s->mb_y*s->mb_width + 1 > next && (s->avctx->err_recognition & AV_EF_AGGRESSIVE)) {
- return -1;
- } else if (s->mb_x + s->mb_y*s->mb_width + 1 >= next)
- return SLICE_END;
-
- if(s->pict_type==AV_PICTURE_TYPE_B){
- const int delta= s->mb_x + 1 == s->mb_width ? 2 : 1;
- ff_thread_await_progress(&s->next_picture_ptr->tf,
- (s->mb_x + delta >= s->mb_width) ? FFMIN(s->mb_y+1, s->mb_height-1) : s->mb_y, 0);
- if (s->next_picture.mbskip_table[xy + delta])
- return SLICE_OK;
- }
-
- return SLICE_END;
- }
- }
-
- return SLICE_OK;
-}
-
-
-static int mpeg4_decode_gop_header(MpegEncContext * s, GetBitContext *gb){
- int hours, minutes, seconds;
-
- if(!show_bits(gb, 23)){
- av_log(s->avctx, AV_LOG_WARNING, "GOP header invalid\n");
- return -1;
- }
-
- 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 mpeg4_decode_profile_level(MpegEncContext * s, GetBitContext *gb){
-
- s->avctx->profile = get_bits(gb, 4);
- s->avctx->level = get_bits(gb, 4);
-
- // for Simple profile, level 0
- if (s->avctx->profile == 0 && s->avctx->level == 8) {
- s->avctx->level = 0;
- }
-
- return 0;
-}
-
-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{
- // set low delay flag only once the smartest? low delay detection won't be overridden
- 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");
- s->avctx->time_base.num = 0;
- 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 ... */
- if (s->width && s->height &&
- (s->width != width || s->height != height))
- s->context_reinit = 1;
- 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);
- if(s->quant_precision<3 || s->quant_precision>9) {
- s->quant_precision = 5;
- }
- } 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);
- skip_bits(gb, 4); /* ref_layer_id */
- skip_bits1(gb); /* ref_layer_sampling_dir */
- 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
- }
- }
-
- if(s->avctx->debug&FF_DEBUG_PICT_INFO) {
- av_log(s->avctx, AV_LOG_DEBUG, "tb %d/%d, tincrbits:%d, qp_prec:%d, ps:%d, %s%s%s%s\n",
- 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 " : ""
- );
- }
-
- return 0;
-}
-
-/**
- * Decode the user data stuff in the header.
- * 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;
- }
- }
-
- /* libavcodec detection */
- 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;
-
- 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)){
- av_log(s->avctx, AV_LOG_ERROR, "low_delay flag incorrectly, clearing it\n");
- s->low_delay=0;
- }
-
- s->partitioned_frame= s->data_partitioning && s->pict_type!=AV_PICTURE_TYPE_B;
- 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++){
- if ( s->pict_type == AV_PICTURE_TYPE_P
- || (s->pict_type == AV_PICTURE_TYPE_S && s->vol_sprite_usage==GMC_SPRITE)) {
- 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);
- 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;
- }
- }
-
- if(IS_3IV1) time_increment= get_bits1(gb); //FIXME investigate further
- else time_increment= get_bits(gb, s->time_increment_bits);
-
- if(s->pict_type!=AV_PICTURE_TYPE_B){
- 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)
- s->current_picture_ptr->f.pts = ROUNDED_DIV(s->time, s->avctx->time_base.num);
- else
- s->current_picture_ptr->f.pts = AV_NOPTS_VALUE;
- if(s->avctx->debug&FF_DEBUG_PTS)
- av_log(s->avctx, AV_LOG_DEBUG, "MPEG4 PTS: %"PRId64"\n",
- s->current_picture_ptr->f.pts);
-
- 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;
- }
- 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))) {
- /* 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) {
- if (s->vol_sprite_usage != 1 || s->pict_type != AV_PICTURE_TYPE_I) {
- skip_bits(gb, 13); /* width */
- skip_bits1(gb); /* marker */
- skip_bits(gb, 13); /* height */
- skip_bits1(gb); /* marker */
- skip_bits(gb, 13); /* hor_spat_ref */
- skip_bits1(gb); /* marker */
- skip_bits(gb, 13); /* ver_spat_ref */
- }
- 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);
- if(s->pict_type != AV_PICTURE_TYPE_I)
- skip_bits_long(gb, s->cplx_estimation_trash_p);
- if(s->pict_type == AV_PICTURE_TYPE_B)
- skip_bits_long(gb, s->cplx_estimation_trash_b);
-
- if(get_bits_left(gb) < 3) {
- av_log(s->avctx, AV_LOG_ERROR, "Header truncated\n");
- return -1;
- }
- s->intra_dc_threshold= ff_mpeg4_dc_threshold[ get_bits(gb, 3) ];
- 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);
- }
-
- if(s->pict_type == AV_PICTURE_TYPE_S && (s->vol_sprite_usage==STATIC_SPRITE || s->vol_sprite_usage==GMC_SPRITE)){
- if(mpeg4_decode_sprite_trajectory(s, gb) < 0)
- return -1;
- 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
- }
-
- if (s->pict_type != AV_PICTURE_TYPE_I) {
- 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");
- s->f_code=1;
- return -1; // makes no sense to continue, as the MV decoding will break very quickly
- }
- }else
- s->f_code=1;
-
- if (s->pict_type == AV_PICTURE_TYPE_B) {
- s->b_code = get_bits(gb, 3);
- 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
- }
- }else
- s->b_code=1;
-
- if(s->avctx->debug&FF_DEBUG_PICT_INFO){
- 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",
- s->qscale, s->f_code, s->b_code,
- 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")),
- 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,
- 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
- );
- }
-
- if(!s->scalability){
- if (s->shape!=RECT_SHAPE && s->pict_type!=AV_PICTURE_TYPE_I) {
- 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)
- if(s->vo_type==0 && s->vol_control_parameters==0 && s->divx_version==-1 && s->picture_number==0){
- av_log(s->avctx, AV_LOG_WARNING, "looks like this file was encoded with (divx4/(old)xvid/opendivx) -> forcing low_delay flag\n");
- 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;
-}
-
-/**
- * Decode mpeg4 headers.
- * @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)
-{
- unsigned startcode, v;
-
- /* 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){
- if(gb->size_in_bits==8 && (s->divx_version>=0 || s->xvid_build>=0) || s->codec_tag == AV_RL32("QMP4")){
- av_log(s->avctx, AV_LOG_VERBOSE, "frame skip %d\n", gb->size_in_bits);
- 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);
- }
- else if(startcode == VOS_STARTCODE){
- mpeg4_decode_profile_level(s, gb);
- }
- 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);
-}
-
-av_cold void ff_mpeg4videodec_static_init(void) {
- static int done = 0;
-
- if (!done) {
- ff_init_rl(&ff_mpeg4_rl_intra, ff_mpeg4_static_rl_table_store[0]);
- 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]);
- INIT_VLC_RL(ff_mpeg4_rl_intra, 554);
- INIT_VLC_RL(ff_rvlc_rl_inter, 1072);
- INIT_VLC_RL(ff_rvlc_rl_intra, 1072);
- INIT_VLC_STATIC(&dc_lum, DC_VLC_BITS, 10 /* 13 */,
- &ff_mpeg4_DCtab_lum[0][1], 2, 1,
- &ff_mpeg4_DCtab_lum[0][0], 2, 1, 512);
- INIT_VLC_STATIC(&dc_chrom, DC_VLC_BITS, 10 /* 13 */,
- &ff_mpeg4_DCtab_chrom[0][1], 2, 1,
- &ff_mpeg4_DCtab_chrom[0][0], 2, 1, 512);
- INIT_VLC_STATIC(&sprite_trajectory, SPRITE_TRAJ_VLC_BITS, 15,
- &ff_sprite_trajectory_tab[0][1], 4, 2,
- &ff_sprite_trajectory_tab[0][0], 4, 2, 128);
- INIT_VLC_STATIC(&mb_type_b_vlc, MB_TYPE_B_VLC_BITS, 4,
- &ff_mb_type_b_tab[0][1], 2, 1,
- &ff_mb_type_b_tab[0][0], 2, 1, 16);
- done = 1;
- }
-}
-
-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();
-
- s->h263_pred = 1;
- s->low_delay = 0; //default, might be overridden in the vol header during header parsing
- s->decode_mb= mpeg4_decode_mb;
- s->time_increment_bits = 4; /* default value for broken headers */
- avctx->chroma_sample_location = AVCHROMA_LOC_LEFT;
-
- avctx->internal->allocate_progress = 1;
-
- return 0;
-}
-
-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" },
- { FF_PROFILE_UNKNOWN },
-};
-
-static const AVOption mpeg4_options[] = {
- {"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},
- {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,
-};
-
-AVCodec ff_mpeg4_decoder = {
- .name = "mpeg4",
- .type = AVMEDIA_TYPE_VIDEO,
- .id = AV_CODEC_ID_MPEG4,
- .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,
- .max_lowres = 3,
- .long_name = NULL_IF_CONFIG_SMALL("MPEG-4 part 2"),
- .pix_fmts = ff_h263_hwaccel_pixfmt_list_420,
- .profiles = NULL_IF_CONFIG_SMALL(mpeg4_video_profiles),
- .update_thread_context = ONLY_IF_THREADS_ENABLED(ff_mpeg_update_thread_context),
- .priv_class = &mpeg4_class,
-};
-
-
-#if CONFIG_MPEG4_VDPAU_DECODER
-AVCodec ff_mpeg4_vdpau_decoder = {
- .name = "mpeg4_vdpau",
- .type = AVMEDIA_TYPE_VIDEO,
- .id = AV_CODEC_ID_MPEG4,
- .priv_data_size = sizeof(MpegEncContext),
- .init = decode_init,
- .close = ff_h263_decode_end,
- .decode = ff_h263_decode_frame,
- .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)"),
- .pix_fmts = (const enum AVPixelFormat[]){ AV_PIX_FMT_VDPAU_MPEG4,
- AV_PIX_FMT_NONE },
- .priv_class = &mpeg4_vdpau_class,
-};
-#endif
generated by cgit v1.2.3 (git 2.39.1) at 2025-12-06 19:31:21 +0000