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h264.c
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h264.c
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/*
* H.26L/H.264/AVC/JVT/14496-10/... decoder
* Copyright (c) 2003 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
*/
/**
* @file
* H.264 / AVC / MPEG4 part10 codec.
* @author Michael Niedermayer <michaelni@gmx.at>
*/
#include "libavcore/imgutils.h"
#include "internal.h"
#include "dsputil.h"
#include "avcodec.h"
#include "mpegvideo.h"
#include "h264.h"
#include "h264data.h"
#include "h264_mvpred.h"
#include "golomb.h"
#include "mathops.h"
#include "rectangle.h"
#include "vdpau_internal.h"
#include "libavutil/avassert.h"
#include "cabac.h"
//#undef NDEBUG
#include <assert.h>
static const uint8_t rem6[52]={
0, 1, 2, 3, 4, 5, 0, 1, 2, 3, 4, 5, 0, 1, 2, 3, 4, 5, 0, 1, 2, 3, 4, 5, 0, 1, 2, 3, 4, 5, 0, 1, 2, 3, 4, 5, 0, 1, 2, 3, 4, 5, 0, 1, 2, 3, 4, 5, 0, 1, 2, 3,
};
static const uint8_t div6[52]={
0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4, 5, 5, 5, 5, 5, 5, 6, 6, 6, 6, 6, 6, 7, 7, 7, 7, 7, 7, 8, 8, 8, 8,
};
static const enum PixelFormat hwaccel_pixfmt_list_h264_jpeg_420[] = {
PIX_FMT_DXVA2_VLD,
PIX_FMT_VAAPI_VLD,
PIX_FMT_YUVJ420P,
PIX_FMT_NONE
};
void ff_h264_write_back_intra_pred_mode(H264Context *h){
int8_t *mode= h->intra4x4_pred_mode + h->mb2br_xy[h->mb_xy];
AV_COPY32(mode, h->intra4x4_pred_mode_cache + 4 + 8*4);
mode[4]= h->intra4x4_pred_mode_cache[7+8*3];
mode[5]= h->intra4x4_pred_mode_cache[7+8*2];
mode[6]= h->intra4x4_pred_mode_cache[7+8*1];
}
/**
* checks if the top & left blocks are available if needed & changes the dc mode so it only uses the available blocks.
*/
int ff_h264_check_intra4x4_pred_mode(H264Context *h){
MpegEncContext * const s = &h->s;
static const int8_t top [12]= {-1, 0,LEFT_DC_PRED,-1,-1,-1,-1,-1, 0};
static const int8_t left[12]= { 0,-1, TOP_DC_PRED, 0,-1,-1,-1, 0,-1,DC_128_PRED};
int i;
if(!(h->top_samples_available&0x8000)){
for(i=0; i<4; i++){
int status= top[ h->intra4x4_pred_mode_cache[scan8[0] + i] ];
if(status<0){
av_log(h->s.avctx, AV_LOG_ERROR, "top block unavailable for requested intra4x4 mode %d at %d %d\n", status, s->mb_x, s->mb_y);
return -1;
} else if(status){
h->intra4x4_pred_mode_cache[scan8[0] + i]= status;
}
}
}
if((h->left_samples_available&0x8888)!=0x8888){
static const int mask[4]={0x8000,0x2000,0x80,0x20};
for(i=0; i<4; i++){
if(!(h->left_samples_available&mask[i])){
int status= left[ h->intra4x4_pred_mode_cache[scan8[0] + 8*i] ];
if(status<0){
av_log(h->s.avctx, AV_LOG_ERROR, "left block unavailable for requested intra4x4 mode %d at %d %d\n", status, s->mb_x, s->mb_y);
return -1;
} else if(status){
h->intra4x4_pred_mode_cache[scan8[0] + 8*i]= status;
}
}
}
}
return 0;
} //FIXME cleanup like ff_h264_check_intra_pred_mode
/**
* checks if the top & left blocks are available if needed & changes the dc mode so it only uses the available blocks.
*/
int ff_h264_check_intra_pred_mode(H264Context *h, int mode){
MpegEncContext * const s = &h->s;
static const int8_t top [7]= {LEFT_DC_PRED8x8, 1,-1,-1};
static const int8_t left[7]= { TOP_DC_PRED8x8,-1, 2,-1,DC_128_PRED8x8};
if(mode > 6U) {
av_log(h->s.avctx, AV_LOG_ERROR, "out of range intra chroma pred mode at %d %d\n", s->mb_x, s->mb_y);
return -1;
}
if(!(h->top_samples_available&0x8000)){
mode= top[ mode ];
if(mode<0){
av_log(h->s.avctx, AV_LOG_ERROR, "top block unavailable for requested intra mode at %d %d\n", s->mb_x, s->mb_y);
return -1;
}
}
if((h->left_samples_available&0x8080) != 0x8080){
mode= left[ mode ];
if(h->left_samples_available&0x8080){ //mad cow disease mode, aka MBAFF + constrained_intra_pred
mode= ALZHEIMER_DC_L0T_PRED8x8 + (!(h->left_samples_available&0x8000)) + 2*(mode == DC_128_PRED8x8);
}
if(mode<0){
av_log(h->s.avctx, AV_LOG_ERROR, "left block unavailable for requested intra mode at %d %d\n", s->mb_x, s->mb_y);
return -1;
}
}
return mode;
}
const uint8_t *ff_h264_decode_nal(H264Context *h, const uint8_t *src, int *dst_length, int *consumed, int length){
int i, si, di;
uint8_t *dst;
int bufidx;
// src[0]&0x80; //forbidden bit
h->nal_ref_idc= src[0]>>5;
h->nal_unit_type= src[0]&0x1F;
src++; length--;
#if 0
for(i=0; i<length; i++)
printf("%2X ", src[i]);
#endif
#if HAVE_FAST_UNALIGNED
# if HAVE_FAST_64BIT
# define RS 7
for(i=0; i+1<length; i+=9){
if(!((~AV_RN64A(src+i) & (AV_RN64A(src+i) - 0x0100010001000101ULL)) & 0x8000800080008080ULL))
# else
# define RS 3
for(i=0; i+1<length; i+=5){
if(!((~AV_RN32A(src+i) & (AV_RN32A(src+i) - 0x01000101U)) & 0x80008080U))
# endif
continue;
if(i>0 && !src[i]) i--;
while(src[i]) i++;
#else
# define RS 0
for(i=0; i+1<length; i+=2){
if(src[i]) continue;
if(i>0 && src[i-1]==0) i--;
#endif
if(i+2<length && src[i+1]==0 && src[i+2]<=3){
if(src[i+2]!=3){
/* startcode, so we must be past the end */
length=i;
}
break;
}
i-= RS;
}
if(i>=length-1){ //no escaped 0
*dst_length= length;
*consumed= length+1; //+1 for the header
return src;
}
bufidx = h->nal_unit_type == NAL_DPC ? 1 : 0; // use second escape buffer for inter data
av_fast_malloc(&h->rbsp_buffer[bufidx], &h->rbsp_buffer_size[bufidx], length+FF_INPUT_BUFFER_PADDING_SIZE);
dst= h->rbsp_buffer[bufidx];
if (dst == NULL){
return NULL;
}
//printf("decoding esc\n");
memcpy(dst, src, i);
si=di=i;
while(si+2<length){
//remove escapes (very rare 1:2^22)
if(src[si+2]>3){
dst[di++]= src[si++];
dst[di++]= src[si++];
}else if(src[si]==0 && src[si+1]==0){
if(src[si+2]==3){ //escape
dst[di++]= 0;
dst[di++]= 0;
si+=3;
continue;
}else //next start code
goto nsc;
}
dst[di++]= src[si++];
}
while(si<length)
dst[di++]= src[si++];
nsc:
memset(dst+di, 0, FF_INPUT_BUFFER_PADDING_SIZE);
*dst_length= di;
*consumed= si + 1;//+1 for the header
//FIXME store exact number of bits in the getbitcontext (it is needed for decoding)
return dst;
}
/**
* Identify the exact end of the bitstream
* @return the length of the trailing, or 0 if damaged
*/
static int ff_h264_decode_rbsp_trailing(H264Context *h, const uint8_t *src){
int v= *src;
int r;
tprintf(h->s.avctx, "rbsp trailing %X\n", v);
for(r=1; r<9; r++){
if(v&1) return r;
v>>=1;
}
return 0;
}
#if 0
/**
* DCT transforms the 16 dc values.
* @param qp quantization parameter ??? FIXME
*/
static void h264_luma_dc_dct_c(DCTELEM *block/*, int qp*/){
// const int qmul= dequant_coeff[qp][0];
int i;
int temp[16]; //FIXME check if this is a good idea
static const int x_offset[4]={0, 1*stride, 4* stride, 5*stride};
static const int y_offset[4]={0, 2*stride, 8* stride, 10*stride};
for(i=0; i<4; i++){
const int offset= y_offset[i];
const int z0= block[offset+stride*0] + block[offset+stride*4];
const int z1= block[offset+stride*0] - block[offset+stride*4];
const int z2= block[offset+stride*1] - block[offset+stride*5];
const int z3= block[offset+stride*1] + block[offset+stride*5];
temp[4*i+0]= z0+z3;
temp[4*i+1]= z1+z2;
temp[4*i+2]= z1-z2;
temp[4*i+3]= z0-z3;
}
for(i=0; i<4; i++){
const int offset= x_offset[i];
const int z0= temp[4*0+i] + temp[4*2+i];
const int z1= temp[4*0+i] - temp[4*2+i];
const int z2= temp[4*1+i] - temp[4*3+i];
const int z3= temp[4*1+i] + temp[4*3+i];
block[stride*0 +offset]= (z0 + z3)>>1;
block[stride*2 +offset]= (z1 + z2)>>1;
block[stride*8 +offset]= (z1 - z2)>>1;
block[stride*10+offset]= (z0 - z3)>>1;
}
}
#endif
#undef xStride
#undef stride
static void chroma_dc_dequant_idct_c(DCTELEM *block, int qmul){
const int stride= 16*2;
const int xStride= 16;
int a,b,c,d,e;
a= block[stride*0 + xStride*0];
b= block[stride*0 + xStride*1];
c= block[stride*1 + xStride*0];
d= block[stride*1 + xStride*1];
e= a-b;
a= a+b;
b= c-d;
c= c+d;
block[stride*0 + xStride*0]= ((a+c)*qmul) >> 7;
block[stride*0 + xStride*1]= ((e+b)*qmul) >> 7;
block[stride*1 + xStride*0]= ((a-c)*qmul) >> 7;
block[stride*1 + xStride*1]= ((e-b)*qmul) >> 7;
}
#if 0
static void chroma_dc_dct_c(DCTELEM *block){
const int stride= 16*2;
const int xStride= 16;
int a,b,c,d,e;
a= block[stride*0 + xStride*0];
b= block[stride*0 + xStride*1];
c= block[stride*1 + xStride*0];
d= block[stride*1 + xStride*1];
e= a-b;
a= a+b;
b= c-d;
c= c+d;
block[stride*0 + xStride*0]= (a+c);
block[stride*0 + xStride*1]= (e+b);
block[stride*1 + xStride*0]= (a-c);
block[stride*1 + xStride*1]= (e-b);
}
#endif
static inline void mc_dir_part(H264Context *h, Picture *pic, int n, int square, int chroma_height, int delta, int list,
uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
int src_x_offset, int src_y_offset,
qpel_mc_func *qpix_op, h264_chroma_mc_func chroma_op){
MpegEncContext * const s = &h->s;
const int mx= h->mv_cache[list][ scan8[n] ][0] + src_x_offset*8;
int my= h->mv_cache[list][ scan8[n] ][1] + src_y_offset*8;
const int luma_xy= (mx&3) + ((my&3)<<2);
uint8_t * src_y = pic->data[0] + (mx>>2) + (my>>2)*h->mb_linesize;
uint8_t * src_cb, * src_cr;
int extra_width= h->emu_edge_width;
int extra_height= h->emu_edge_height;
int emu=0;
const int full_mx= mx>>2;
const int full_my= my>>2;
const int pic_width = 16*s->mb_width;
const int pic_height = 16*s->mb_height >> MB_FIELD;
if(mx&7) extra_width -= 3;
if(my&7) extra_height -= 3;
if( full_mx < 0-extra_width
|| full_my < 0-extra_height
|| full_mx + 16/*FIXME*/ > pic_width + extra_width
|| full_my + 16/*FIXME*/ > pic_height + extra_height){
s->dsp.emulated_edge_mc(s->edge_emu_buffer, src_y - 2 - 2*h->mb_linesize, h->mb_linesize, 16+5, 16+5/*FIXME*/, full_mx-2, full_my-2, pic_width, pic_height);
src_y= s->edge_emu_buffer + 2 + 2*h->mb_linesize;
emu=1;
}
qpix_op[luma_xy](dest_y, src_y, h->mb_linesize); //FIXME try variable height perhaps?
if(!square){
qpix_op[luma_xy](dest_y + delta, src_y + delta, h->mb_linesize);
}
if(CONFIG_GRAY && s->flags&CODEC_FLAG_GRAY) return;
if(MB_FIELD){
// chroma offset when predicting from a field of opposite parity
my += 2 * ((s->mb_y & 1) - (pic->reference - 1));
emu |= (my>>3) < 0 || (my>>3) + 8 >= (pic_height>>1);
}
src_cb= pic->data[1] + (mx>>3) + (my>>3)*h->mb_uvlinesize;
src_cr= pic->data[2] + (mx>>3) + (my>>3)*h->mb_uvlinesize;
if(emu){
s->dsp.emulated_edge_mc(s->edge_emu_buffer, src_cb, h->mb_uvlinesize, 9, 9/*FIXME*/, (mx>>3), (my>>3), pic_width>>1, pic_height>>1);
src_cb= s->edge_emu_buffer;
}
chroma_op(dest_cb, src_cb, h->mb_uvlinesize, chroma_height, mx&7, my&7);
if(emu){
s->dsp.emulated_edge_mc(s->edge_emu_buffer, src_cr, h->mb_uvlinesize, 9, 9/*FIXME*/, (mx>>3), (my>>3), pic_width>>1, pic_height>>1);
src_cr= s->edge_emu_buffer;
}
chroma_op(dest_cr, src_cr, h->mb_uvlinesize, chroma_height, mx&7, my&7);
}
static inline void mc_part_std(H264Context *h, int n, int square, int chroma_height, int delta,
uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
int x_offset, int y_offset,
qpel_mc_func *qpix_put, h264_chroma_mc_func chroma_put,
qpel_mc_func *qpix_avg, h264_chroma_mc_func chroma_avg,
int list0, int list1){
MpegEncContext * const s = &h->s;
qpel_mc_func *qpix_op= qpix_put;
h264_chroma_mc_func chroma_op= chroma_put;
dest_y += 2*x_offset + 2*y_offset*h-> mb_linesize;
dest_cb += x_offset + y_offset*h->mb_uvlinesize;
dest_cr += x_offset + y_offset*h->mb_uvlinesize;
x_offset += 8*s->mb_x;
y_offset += 8*(s->mb_y >> MB_FIELD);
if(list0){
Picture *ref= &h->ref_list[0][ h->ref_cache[0][ scan8[n] ] ];
mc_dir_part(h, ref, n, square, chroma_height, delta, 0,
dest_y, dest_cb, dest_cr, x_offset, y_offset,
qpix_op, chroma_op);
qpix_op= qpix_avg;
chroma_op= chroma_avg;
}
if(list1){
Picture *ref= &h->ref_list[1][ h->ref_cache[1][ scan8[n] ] ];
mc_dir_part(h, ref, n, square, chroma_height, delta, 1,
dest_y, dest_cb, dest_cr, x_offset, y_offset,
qpix_op, chroma_op);
}
}
static inline void mc_part_weighted(H264Context *h, int n, int square, int chroma_height, int delta,
uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
int x_offset, int y_offset,
qpel_mc_func *qpix_put, h264_chroma_mc_func chroma_put,
h264_weight_func luma_weight_op, h264_weight_func chroma_weight_op,
h264_biweight_func luma_weight_avg, h264_biweight_func chroma_weight_avg,
int list0, int list1){
MpegEncContext * const s = &h->s;
dest_y += 2*x_offset + 2*y_offset*h-> mb_linesize;
dest_cb += x_offset + y_offset*h->mb_uvlinesize;
dest_cr += x_offset + y_offset*h->mb_uvlinesize;
x_offset += 8*s->mb_x;
y_offset += 8*(s->mb_y >> MB_FIELD);
if(list0 && list1){
/* don't optimize for luma-only case, since B-frames usually
* use implicit weights => chroma too. */
uint8_t *tmp_cb = s->obmc_scratchpad;
uint8_t *tmp_cr = s->obmc_scratchpad + 8;
uint8_t *tmp_y = s->obmc_scratchpad + 8*h->mb_uvlinesize;
int refn0 = h->ref_cache[0][ scan8[n] ];
int refn1 = h->ref_cache[1][ scan8[n] ];
mc_dir_part(h, &h->ref_list[0][refn0], n, square, chroma_height, delta, 0,
dest_y, dest_cb, dest_cr,
x_offset, y_offset, qpix_put, chroma_put);
mc_dir_part(h, &h->ref_list[1][refn1], n, square, chroma_height, delta, 1,
tmp_y, tmp_cb, tmp_cr,
x_offset, y_offset, qpix_put, chroma_put);
if(h->use_weight == 2){
int weight0 = h->implicit_weight[refn0][refn1][s->mb_y&1];
int weight1 = 64 - weight0;
luma_weight_avg( dest_y, tmp_y, h-> mb_linesize, 5, weight0, weight1, 0);
chroma_weight_avg(dest_cb, tmp_cb, h->mb_uvlinesize, 5, weight0, weight1, 0);
chroma_weight_avg(dest_cr, tmp_cr, h->mb_uvlinesize, 5, weight0, weight1, 0);
}else{
luma_weight_avg(dest_y, tmp_y, h->mb_linesize, h->luma_log2_weight_denom,
h->luma_weight[refn0][0][0] , h->luma_weight[refn1][1][0],
h->luma_weight[refn0][0][1] + h->luma_weight[refn1][1][1]);
chroma_weight_avg(dest_cb, tmp_cb, h->mb_uvlinesize, h->chroma_log2_weight_denom,
h->chroma_weight[refn0][0][0][0] , h->chroma_weight[refn1][1][0][0],
h->chroma_weight[refn0][0][0][1] + h->chroma_weight[refn1][1][0][1]);
chroma_weight_avg(dest_cr, tmp_cr, h->mb_uvlinesize, h->chroma_log2_weight_denom,
h->chroma_weight[refn0][0][1][0] , h->chroma_weight[refn1][1][1][0],
h->chroma_weight[refn0][0][1][1] + h->chroma_weight[refn1][1][1][1]);
}
}else{
int list = list1 ? 1 : 0;
int refn = h->ref_cache[list][ scan8[n] ];
Picture *ref= &h->ref_list[list][refn];
mc_dir_part(h, ref, n, square, chroma_height, delta, list,
dest_y, dest_cb, dest_cr, x_offset, y_offset,
qpix_put, chroma_put);
luma_weight_op(dest_y, h->mb_linesize, h->luma_log2_weight_denom,
h->luma_weight[refn][list][0], h->luma_weight[refn][list][1]);
if(h->use_weight_chroma){
chroma_weight_op(dest_cb, h->mb_uvlinesize, h->chroma_log2_weight_denom,
h->chroma_weight[refn][list][0][0], h->chroma_weight[refn][list][0][1]);
chroma_weight_op(dest_cr, h->mb_uvlinesize, h->chroma_log2_weight_denom,
h->chroma_weight[refn][list][1][0], h->chroma_weight[refn][list][1][1]);
}
}
}
static inline void mc_part(H264Context *h, int n, int square, int chroma_height, int delta,
uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
int x_offset, int y_offset,
qpel_mc_func *qpix_put, h264_chroma_mc_func chroma_put,
qpel_mc_func *qpix_avg, h264_chroma_mc_func chroma_avg,
h264_weight_func *weight_op, h264_biweight_func *weight_avg,
int list0, int list1){
if((h->use_weight==2 && list0 && list1
&& (h->implicit_weight[ h->ref_cache[0][scan8[n]] ][ h->ref_cache[1][scan8[n]] ][h->s.mb_y&1] != 32))
|| h->use_weight==1)
mc_part_weighted(h, n, square, chroma_height, delta, dest_y, dest_cb, dest_cr,
x_offset, y_offset, qpix_put, chroma_put,
weight_op[0], weight_op[3], weight_avg[0], weight_avg[3], list0, list1);
else
mc_part_std(h, n, square, chroma_height, delta, dest_y, dest_cb, dest_cr,
x_offset, y_offset, qpix_put, chroma_put, qpix_avg, chroma_avg, list0, list1);
}
static inline void prefetch_motion(H264Context *h, int list){
/* fetch pixels for estimated mv 4 macroblocks ahead
* optimized for 64byte cache lines */
MpegEncContext * const s = &h->s;
const int refn = h->ref_cache[list][scan8[0]];
if(refn >= 0){
const int mx= (h->mv_cache[list][scan8[0]][0]>>2) + 16*s->mb_x + 8;
const int my= (h->mv_cache[list][scan8[0]][1]>>2) + 16*s->mb_y;
uint8_t **src= h->ref_list[list][refn].data;
int off= mx + (my + (s->mb_x&3)*4)*h->mb_linesize + 64;
s->dsp.prefetch(src[0]+off, s->linesize, 4);
off= (mx>>1) + ((my>>1) + (s->mb_x&7))*s->uvlinesize + 64;
s->dsp.prefetch(src[1]+off, src[2]-src[1], 2);
}
}
static void hl_motion(H264Context *h, uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
qpel_mc_func (*qpix_put)[16], h264_chroma_mc_func (*chroma_put),
qpel_mc_func (*qpix_avg)[16], h264_chroma_mc_func (*chroma_avg),
h264_weight_func *weight_op, h264_biweight_func *weight_avg){
MpegEncContext * const s = &h->s;
const int mb_xy= h->mb_xy;
const int mb_type= s->current_picture.mb_type[mb_xy];
assert(IS_INTER(mb_type));
prefetch_motion(h, 0);
if(IS_16X16(mb_type)){
mc_part(h, 0, 1, 8, 0, dest_y, dest_cb, dest_cr, 0, 0,
qpix_put[0], chroma_put[0], qpix_avg[0], chroma_avg[0],
weight_op, weight_avg,
IS_DIR(mb_type, 0, 0), IS_DIR(mb_type, 0, 1));
}else if(IS_16X8(mb_type)){
mc_part(h, 0, 0, 4, 8, dest_y, dest_cb, dest_cr, 0, 0,
qpix_put[1], chroma_put[0], qpix_avg[1], chroma_avg[0],
&weight_op[1], &weight_avg[1],
IS_DIR(mb_type, 0, 0), IS_DIR(mb_type, 0, 1));
mc_part(h, 8, 0, 4, 8, dest_y, dest_cb, dest_cr, 0, 4,
qpix_put[1], chroma_put[0], qpix_avg[1], chroma_avg[0],
&weight_op[1], &weight_avg[1],
IS_DIR(mb_type, 1, 0), IS_DIR(mb_type, 1, 1));
}else if(IS_8X16(mb_type)){
mc_part(h, 0, 0, 8, 8*h->mb_linesize, dest_y, dest_cb, dest_cr, 0, 0,
qpix_put[1], chroma_put[1], qpix_avg[1], chroma_avg[1],
&weight_op[2], &weight_avg[2],
IS_DIR(mb_type, 0, 0), IS_DIR(mb_type, 0, 1));
mc_part(h, 4, 0, 8, 8*h->mb_linesize, dest_y, dest_cb, dest_cr, 4, 0,
qpix_put[1], chroma_put[1], qpix_avg[1], chroma_avg[1],
&weight_op[2], &weight_avg[2],
IS_DIR(mb_type, 1, 0), IS_DIR(mb_type, 1, 1));
}else{
int i;
assert(IS_8X8(mb_type));
for(i=0; i<4; i++){
const int sub_mb_type= h->sub_mb_type[i];
const int n= 4*i;
int x_offset= (i&1)<<2;
int y_offset= (i&2)<<1;
if(IS_SUB_8X8(sub_mb_type)){
mc_part(h, n, 1, 4, 0, dest_y, dest_cb, dest_cr, x_offset, y_offset,
qpix_put[1], chroma_put[1], qpix_avg[1], chroma_avg[1],
&weight_op[3], &weight_avg[3],
IS_DIR(sub_mb_type, 0, 0), IS_DIR(sub_mb_type, 0, 1));
}else if(IS_SUB_8X4(sub_mb_type)){
mc_part(h, n , 0, 2, 4, dest_y, dest_cb, dest_cr, x_offset, y_offset,
qpix_put[2], chroma_put[1], qpix_avg[2], chroma_avg[1],
&weight_op[4], &weight_avg[4],
IS_DIR(sub_mb_type, 0, 0), IS_DIR(sub_mb_type, 0, 1));
mc_part(h, n+2, 0, 2, 4, dest_y, dest_cb, dest_cr, x_offset, y_offset+2,
qpix_put[2], chroma_put[1], qpix_avg[2], chroma_avg[1],
&weight_op[4], &weight_avg[4],
IS_DIR(sub_mb_type, 0, 0), IS_DIR(sub_mb_type, 0, 1));
}else if(IS_SUB_4X8(sub_mb_type)){
mc_part(h, n , 0, 4, 4*h->mb_linesize, dest_y, dest_cb, dest_cr, x_offset, y_offset,
qpix_put[2], chroma_put[2], qpix_avg[2], chroma_avg[2],
&weight_op[5], &weight_avg[5],
IS_DIR(sub_mb_type, 0, 0), IS_DIR(sub_mb_type, 0, 1));
mc_part(h, n+1, 0, 4, 4*h->mb_linesize, dest_y, dest_cb, dest_cr, x_offset+2, y_offset,
qpix_put[2], chroma_put[2], qpix_avg[2], chroma_avg[2],
&weight_op[5], &weight_avg[5],
IS_DIR(sub_mb_type, 0, 0), IS_DIR(sub_mb_type, 0, 1));
}else{
int j;
assert(IS_SUB_4X4(sub_mb_type));
for(j=0; j<4; j++){
int sub_x_offset= x_offset + 2*(j&1);
int sub_y_offset= y_offset + (j&2);
mc_part(h, n+j, 1, 2, 0, dest_y, dest_cb, dest_cr, sub_x_offset, sub_y_offset,
qpix_put[2], chroma_put[2], qpix_avg[2], chroma_avg[2],
&weight_op[6], &weight_avg[6],
IS_DIR(sub_mb_type, 0, 0), IS_DIR(sub_mb_type, 0, 1));
}
}
}
}
prefetch_motion(h, 1);
}
static void free_tables(H264Context *h, int free_rbsp){
int i;
H264Context *hx;
av_freep(&h->intra4x4_pred_mode);
av_freep(&h->chroma_pred_mode_table);
av_freep(&h->cbp_table);
av_freep(&h->mvd_table[0]);
av_freep(&h->mvd_table[1]);
av_freep(&h->direct_table);
av_freep(&h->non_zero_count);
av_freep(&h->slice_table_base);
h->slice_table= NULL;
av_freep(&h->list_counts);
av_freep(&h->mb2b_xy);
av_freep(&h->mb2br_xy);
for(i = 0; i < MAX_THREADS; i++) {
hx = h->thread_context[i];
if(!hx) continue;
av_freep(&hx->top_borders[1]);
av_freep(&hx->top_borders[0]);
av_freep(&hx->s.obmc_scratchpad);
if (free_rbsp){
av_freep(&hx->rbsp_buffer[1]);
av_freep(&hx->rbsp_buffer[0]);
hx->rbsp_buffer_size[0] = 0;
hx->rbsp_buffer_size[1] = 0;
}
if (i) av_freep(&h->thread_context[i]);
}
}
static void init_dequant8_coeff_table(H264Context *h){
int i,q,x;
h->dequant8_coeff[0] = h->dequant8_buffer[0];
h->dequant8_coeff[1] = h->dequant8_buffer[1];
for(i=0; i<2; i++ ){
if(i && !memcmp(h->pps.scaling_matrix8[0], h->pps.scaling_matrix8[1], 64*sizeof(uint8_t))){
h->dequant8_coeff[1] = h->dequant8_buffer[0];
break;
}
for(q=0; q<52; q++){
int shift = div6[q];
int idx = rem6[q];
for(x=0; x<64; x++)
h->dequant8_coeff[i][q][(x>>3)|((x&7)<<3)] =
((uint32_t)dequant8_coeff_init[idx][ dequant8_coeff_init_scan[((x>>1)&12) | (x&3)] ] *
h->pps.scaling_matrix8[i][x]) << shift;
}
}
}
static void init_dequant4_coeff_table(H264Context *h){
int i,j,q,x;
for(i=0; i<6; i++ ){
h->dequant4_coeff[i] = h->dequant4_buffer[i];
for(j=0; j<i; j++){
if(!memcmp(h->pps.scaling_matrix4[j], h->pps.scaling_matrix4[i], 16*sizeof(uint8_t))){
h->dequant4_coeff[i] = h->dequant4_buffer[j];
break;
}
}
if(j<i)
continue;
for(q=0; q<52; q++){
int shift = div6[q] + 2;
int idx = rem6[q];
for(x=0; x<16; x++)
h->dequant4_coeff[i][q][(x>>2)|((x<<2)&0xF)] =
((uint32_t)dequant4_coeff_init[idx][(x&1) + ((x>>2)&1)] *
h->pps.scaling_matrix4[i][x]) << shift;
}
}
}
static void init_dequant_tables(H264Context *h){
int i,x;
init_dequant4_coeff_table(h);
if(h->pps.transform_8x8_mode)
init_dequant8_coeff_table(h);
if(h->sps.transform_bypass){
for(i=0; i<6; i++)
for(x=0; x<16; x++)
h->dequant4_coeff[i][0][x] = 1<<6;
if(h->pps.transform_8x8_mode)
for(i=0; i<2; i++)
for(x=0; x<64; x++)
h->dequant8_coeff[i][0][x] = 1<<6;
}
}
int ff_h264_alloc_tables(H264Context *h){
MpegEncContext * const s = &h->s;
const int big_mb_num= s->mb_stride * (s->mb_height+1);
const int row_mb_num= 2*s->mb_stride*s->avctx->thread_count;
int x,y;
FF_ALLOCZ_OR_GOTO(h->s.avctx, h->intra4x4_pred_mode, row_mb_num * 8 * sizeof(uint8_t), fail)
FF_ALLOCZ_OR_GOTO(h->s.avctx, h->non_zero_count , big_mb_num * 32 * sizeof(uint8_t), fail)
FF_ALLOCZ_OR_GOTO(h->s.avctx, h->slice_table_base , (big_mb_num+s->mb_stride) * sizeof(*h->slice_table_base), fail)
FF_ALLOCZ_OR_GOTO(h->s.avctx, h->cbp_table, big_mb_num * sizeof(uint16_t), fail)
FF_ALLOCZ_OR_GOTO(h->s.avctx, h->chroma_pred_mode_table, big_mb_num * sizeof(uint8_t), fail)
FF_ALLOCZ_OR_GOTO(h->s.avctx, h->mvd_table[0], 16*row_mb_num * sizeof(uint8_t), fail);
FF_ALLOCZ_OR_GOTO(h->s.avctx, h->mvd_table[1], 16*row_mb_num * sizeof(uint8_t), fail);
FF_ALLOCZ_OR_GOTO(h->s.avctx, h->direct_table, 4*big_mb_num * sizeof(uint8_t) , fail);
FF_ALLOCZ_OR_GOTO(h->s.avctx, h->list_counts, big_mb_num * sizeof(uint8_t), fail)
memset(h->slice_table_base, -1, (big_mb_num+s->mb_stride) * sizeof(*h->slice_table_base));
h->slice_table= h->slice_table_base + s->mb_stride*2 + 1;
FF_ALLOCZ_OR_GOTO(h->s.avctx, h->mb2b_xy , big_mb_num * sizeof(uint32_t), fail);
FF_ALLOCZ_OR_GOTO(h->s.avctx, h->mb2br_xy , big_mb_num * sizeof(uint32_t), fail);
for(y=0; y<s->mb_height; y++){
for(x=0; x<s->mb_width; x++){
const int mb_xy= x + y*s->mb_stride;
const int b_xy = 4*x + 4*y*h->b_stride;
h->mb2b_xy [mb_xy]= b_xy;
h->mb2br_xy[mb_xy]= 8*(FMO ? mb_xy : (mb_xy % (2*s->mb_stride)));
}
}
s->obmc_scratchpad = NULL;
if(!h->dequant4_coeff[0])
init_dequant_tables(h);
return 0;
fail:
free_tables(h, 1);
return -1;
}
/**
* Mimic alloc_tables(), but for every context thread.
*/
static void clone_tables(H264Context *dst, H264Context *src, int i){
MpegEncContext * const s = &src->s;
dst->intra4x4_pred_mode = src->intra4x4_pred_mode + i*8*2*s->mb_stride;
dst->non_zero_count = src->non_zero_count;
dst->slice_table = src->slice_table;
dst->cbp_table = src->cbp_table;
dst->mb2b_xy = src->mb2b_xy;
dst->mb2br_xy = src->mb2br_xy;
dst->chroma_pred_mode_table = src->chroma_pred_mode_table;
dst->mvd_table[0] = src->mvd_table[0] + i*8*2*s->mb_stride;
dst->mvd_table[1] = src->mvd_table[1] + i*8*2*s->mb_stride;
dst->direct_table = src->direct_table;
dst->list_counts = src->list_counts;
dst->s.obmc_scratchpad = NULL;
ff_h264_pred_init(&dst->hpc, src->s.codec_id);
}
/**
* Init context
* Allocate buffers which are not shared amongst multiple threads.
*/
static int context_init(H264Context *h){
FF_ALLOCZ_OR_GOTO(h->s.avctx, h->top_borders[0], h->s.mb_width * (16+8+8) * sizeof(uint8_t), fail)
FF_ALLOCZ_OR_GOTO(h->s.avctx, h->top_borders[1], h->s.mb_width * (16+8+8) * sizeof(uint8_t), fail)
h->ref_cache[0][scan8[5 ]+1] = h->ref_cache[0][scan8[7 ]+1] = h->ref_cache[0][scan8[13]+1] =
h->ref_cache[1][scan8[5 ]+1] = h->ref_cache[1][scan8[7 ]+1] = h->ref_cache[1][scan8[13]+1] = PART_NOT_AVAILABLE;
return 0;
fail:
return -1; // free_tables will clean up for us
}
static int decode_nal_units(H264Context *h, const uint8_t *buf, int buf_size);
static av_cold void common_init(H264Context *h){
MpegEncContext * const s = &h->s;
s->width = s->avctx->width;
s->height = s->avctx->height;
s->codec_id= s->avctx->codec->id;
ff_h264dsp_init(&h->h264dsp);
ff_h264_pred_init(&h->hpc, s->codec_id);
h->dequant_coeff_pps= -1;
s->unrestricted_mv=1;
s->decode=1; //FIXME
dsputil_init(&s->dsp, s->avctx); // needed so that idct permutation is known early
memset(h->pps.scaling_matrix4, 16, 6*16*sizeof(uint8_t));
memset(h->pps.scaling_matrix8, 16, 2*64*sizeof(uint8_t));
}
int ff_h264_decode_extradata(H264Context *h)
{
AVCodecContext *avctx = h->s.avctx;
if(*(char *)avctx->extradata == 1){
int i, cnt, nalsize;
unsigned char *p = avctx->extradata;
h->is_avc = 1;
if(avctx->extradata_size < 7) {
av_log(avctx, AV_LOG_ERROR, "avcC too short\n");
return -1;
}
/* sps and pps in the avcC always have length coded with 2 bytes,
so put a fake nal_length_size = 2 while parsing them */
h->nal_length_size = 2;
// Decode sps from avcC
cnt = *(p+5) & 0x1f; // Number of sps
p += 6;
for (i = 0; i < cnt; i++) {
nalsize = AV_RB16(p) + 2;
if(decode_nal_units(h, p, nalsize) < 0) {
av_log(avctx, AV_LOG_ERROR, "Decoding sps %d from avcC failed\n", i);
return -1;
}
p += nalsize;
}
// Decode pps from avcC
cnt = *(p++); // Number of pps
for (i = 0; i < cnt; i++) {
nalsize = AV_RB16(p) + 2;
if(decode_nal_units(h, p, nalsize) != nalsize) {
av_log(avctx, AV_LOG_ERROR, "Decoding pps %d from avcC failed\n", i);
return -1;
}
p += nalsize;
}
// Now store right nal length size, that will be use to parse all other nals
h->nal_length_size = ((*(((char*)(avctx->extradata))+4))&0x03)+1;
} else {
h->is_avc = 0;
if(decode_nal_units(h, avctx->extradata, avctx->extradata_size) < 0)
return -1;
}
return 0;
}
av_cold int ff_h264_decode_init(AVCodecContext *avctx){
H264Context *h= avctx->priv_data;
MpegEncContext * const s = &h->s;
MPV_decode_defaults(s);
s->avctx = avctx;
common_init(h);
s->out_format = FMT_H264;
s->workaround_bugs= avctx->workaround_bugs;
// set defaults
// s->decode_mb= ff_h263_decode_mb;
s->quarter_sample = 1;
if(!avctx->has_b_frames)
s->low_delay= 1;
avctx->chroma_sample_location = AVCHROMA_LOC_LEFT;
ff_h264_decode_init_vlc();
h->thread_context[0] = h;
h->outputed_poc = INT_MIN;
h->prev_poc_msb= 1<<16;
h->x264_build = -1;
ff_h264_reset_sei(h);
if(avctx->codec_id == CODEC_ID_H264){
if(avctx->ticks_per_frame == 1){
s->avctx->time_base.den *=2;
}
avctx->ticks_per_frame = 2;
}
if(avctx->extradata_size > 0 && avctx->extradata &&
ff_h264_decode_extradata(h))
return -1;
if(h->sps.bitstream_restriction_flag && s->avctx->has_b_frames < h->sps.num_reorder_frames){
s->avctx->has_b_frames = h->sps.num_reorder_frames;
s->low_delay = 0;
}
return 0;
}
int ff_h264_frame_start(H264Context *h){
MpegEncContext * const s = &h->s;
int i;
if(MPV_frame_start(s, s->avctx) < 0)
return -1;
ff_er_frame_start(s);
/*
* MPV_frame_start uses pict_type to derive key_frame.
* This is incorrect for H.264; IDR markings must be used.
* Zero here; IDR markings per slice in frame or fields are ORed in later.
* See decode_nal_units().
*/
s->current_picture_ptr->key_frame= 0;
s->current_picture_ptr->mmco_reset= 0;
assert(s->linesize && s->uvlinesize);
for(i=0; i<16; i++){
h->block_offset[i]= 4*((scan8[i] - scan8[0])&7) + 4*s->linesize*((scan8[i] - scan8[0])>>3);
h->block_offset[24+i]= 4*((scan8[i] - scan8[0])&7) + 8*s->linesize*((scan8[i] - scan8[0])>>3);
}
for(i=0; i<4; i++){
h->block_offset[16+i]=
h->block_offset[20+i]= 4*((scan8[i] - scan8[0])&7) + 4*s->uvlinesize*((scan8[i] - scan8[0])>>3);
h->block_offset[24+16+i]=
h->block_offset[24+20+i]= 4*((scan8[i] - scan8[0])&7) + 8*s->uvlinesize*((scan8[i] - scan8[0])>>3);
}
/* can't be in alloc_tables because linesize isn't known there.
* FIXME: redo bipred weight to not require extra buffer? */
for(i = 0; i < s->avctx->thread_count; i++)
if(h->thread_context[i] && !h->thread_context[i]->s.obmc_scratchpad)
h->thread_context[i]->s.obmc_scratchpad = av_malloc(16*2*s->linesize + 8*2*s->uvlinesize);
/* some macroblocks can be accessed before they're available in case of lost slices, mbaff or threading*/
memset(h->slice_table, -1, (s->mb_height*s->mb_stride-1) * sizeof(*h->slice_table));
// s->decode= (s->flags&CODEC_FLAG_PSNR) || !s->encoding || s->current_picture.reference /*|| h->contains_intra*/ || 1;
// We mark the current picture as non-reference after allocating it, so
// that if we break out due to an error it can be released automatically
// in the next MPV_frame_start().
// SVQ3 as well as most other codecs have only last/next/current and thus
// get released even with set reference, besides SVQ3 and others do not
// mark frames as reference later "naturally".
if(s->codec_id != CODEC_ID_SVQ3)
s->current_picture_ptr->reference= 0;
s->current_picture_ptr->field_poc[0]=
s->current_picture_ptr->field_poc[1]= INT_MAX;
assert(s->current_picture_ptr->long_ref==0);
return 0;
}
static inline void backup_mb_border(H264Context *h, uint8_t *src_y, uint8_t *src_cb, uint8_t *src_cr, int linesize, int uvlinesize, int simple){
MpegEncContext * const s = &h->s;
uint8_t *top_border;
int top_idx = 1;
src_y -= linesize;
src_cb -= uvlinesize;
src_cr -= uvlinesize;
if(!simple && FRAME_MBAFF){
if(s->mb_y&1){
if(!MB_MBAFF){
top_border = h->top_borders[0][s->mb_x];
AV_COPY128(top_border, src_y + 15*linesize);
if(simple || !CONFIG_GRAY || !(s->flags&CODEC_FLAG_GRAY)){
AV_COPY64(top_border+16, src_cb+7*uvlinesize);
AV_COPY64(top_border+24, src_cr+7*uvlinesize);
}
}
}else if(MB_MBAFF){
top_idx = 0;
}else
return;
}
top_border = h->top_borders[top_idx][s->mb_x];
// There are two lines saved, the line above the the top macroblock of a pair,
// and the line above the bottom macroblock
AV_COPY128(top_border, src_y + 16*linesize);
if(simple || !CONFIG_GRAY || !(s->flags&CODEC_FLAG_GRAY)){
AV_COPY64(top_border+16, src_cb+8*uvlinesize);