+++ /dev/null
-/*
- * FFV1 codec for libavcodec
- *
- * Copyright (c) 2003 Michael Niedermayer <michaelni@gmx.at>
- *
- * This library 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 of the License, or (at your option) any later version.
- *
- * This library 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 this library; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- *
- */
-
-/**
- * @file ffv1.c
- * FF Video Codec 1 (a experimental lossless codec)
- */
-
-#include "common.h"
-#include "avcodec.h"
-#include "dsputil.h"
-#include "cabac.h"
-#include "golomb.h"
-
-#define MAX_PLANES 4
-#define CONTEXT_SIZE 32
-
-static const int8_t quant3[256]={
- 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
- 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
- 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
- 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
- 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
- 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
- 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
- 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
--1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
--1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
--1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
--1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
--1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
--1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
--1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
--1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1, 0,
-};
-static const int8_t quant5[256]={
- 0, 1, 1, 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
- 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
- 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
- 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
- 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
- 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
- 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
- 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
--2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,
--2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,
--2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,
--2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,
--2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,
--2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,
--2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,
--2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-1,-1,-1,
-};
-static const int8_t quant7[256]={
- 0, 1, 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
- 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
- 2, 2, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 3,
- 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
- 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
- 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
- 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
- 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
--3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,
--3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,
--3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,
--3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,
--3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-3,
--3,-3,-3,-3,-3,-3,-3,-3,-3,-2,-2,-2,-2,-2,-2,-2,
--2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,
--2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-2,-1,-1,
-};
-static const int8_t quant9[256]={
- 0, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 3, 3,
- 3, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
- 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
- 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
- 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
- 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
- 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
- 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
--4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,
--4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,
--4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,
--4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,
--4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,
--4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,
--4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-3,-3,-3,-3,
--3,-3,-3,-3,-3,-3,-3,-3,-3,-3,-2,-2,-2,-2,-1,-1,
-};
-static const int8_t quant11[256]={
- 0, 1, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 4, 4, 4, 4,
- 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
- 4, 4, 4, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,
- 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,
- 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,
- 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,
- 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,
- 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,
--5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,
--5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,
--5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,
--5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,
--5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,
--5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-4,-4,
--4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,
--4,-4,-4,-4,-4,-3,-3,-3,-3,-3,-3,-3,-2,-2,-2,-1,
-};
-static const int8_t quant13[256]={
- 0, 1, 2, 2, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4, 4, 4,
- 4, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,
- 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,
- 5, 5, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6,
- 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6,
- 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6,
- 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6,
- 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6,
--6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,
--6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,
--6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,
--6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,
--6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-6,-5,
--5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,
--5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,-5,
--4,-4,-4,-4,-4,-4,-4,-4,-4,-3,-3,-3,-3,-2,-2,-1,
-};
-
-static const uint8_t log2_run[32]={
- 0, 0, 0, 0, 1, 1, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3,
- 4, 4, 5, 5, 6, 6, 7, 7,
- 8, 9,10,11,12,13,14,15,
-};
-
-typedef struct VlcState{
- int16_t drift;
- uint16_t error_sum;
- int8_t bias;
- uint8_t count;
-} VlcState;
-
-typedef struct PlaneContext{
- int context_count;
- uint8_t (*state)[CONTEXT_SIZE];
- VlcState *vlc_state;
- uint8_t interlace_bit_state[2];
-} PlaneContext;
-
-typedef struct FFV1Context{
- AVCodecContext *avctx;
- CABACContext c;
- GetBitContext gb;
- PutBitContext pb;
- int version;
- int width, height;
- int chroma_h_shift, chroma_v_shift;
- int flags;
- int picture_number;
- AVFrame picture;
- int plane_count;
- int ac; ///< 1-> CABAC 0-> golomb rice
- PlaneContext plane[MAX_PLANES];
- int16_t quant_table[5][256];
-
- DSPContext dsp;
-}FFV1Context;
-
-static inline int predict(uint8_t *src, uint8_t *last){
- const int LT= last[-1];
- const int T= last[ 0];
- const int L = src[-1];
-
- return mid_pred(L, L + T - LT, T);
-}
-
-static inline int get_context(FFV1Context *f, uint8_t *src, uint8_t *last, uint8_t *last2){
- const int LT= last[-1];
- const int T= last[ 0];
- const int RT= last[ 1];
- const int L = src[-1];
-
- if(f->quant_table[3][127]){
- const int TT= last2[0];
- const int LL= src[-2];
- return f->quant_table[0][(L-LT) & 0xFF] + f->quant_table[1][(LT-T) & 0xFF] + f->quant_table[2][(T-RT) & 0xFF]
- +f->quant_table[3][(LL-L) & 0xFF] + f->quant_table[4][(TT-T) & 0xFF];
- }else
- return f->quant_table[0][(L-LT) & 0xFF] + f->quant_table[1][(LT-T) & 0xFF] + f->quant_table[2][(T-RT) & 0xFF];
-}
-
-/**
- * put
- */
-static inline void put_symbol(CABACContext *c, uint8_t *state, int v, int is_signed, int max_exp){
- int i;
-
- if(v){
- const int a= ABS(v);
- const int e= av_log2(a);
-
- put_cabac(c, state+0, 0);
-
- for(i=0; i<e; i++){
- put_cabac(c, state+1+i, 1); //1..8
- }
-
- if(e<max_exp){
- put_cabac(c, state+1+i, 0); //1..8
-
- for(i=e-1; i>=0; i--){
- put_cabac(c, state+16+e+i, (a>>i)&1); //17..29
- }
- if(is_signed)
- put_cabac(c, state+9 + e, v < 0); //9..16
- }
- }else{
- put_cabac(c, state+0, 1);
- }
-}
-
-static inline int get_symbol(CABACContext *c, uint8_t *state, int is_signed, int max_exp){
- if(get_cabac(c, state+0))
- return 0;
- else{
- int i, e;
-
- for(e=0; e<max_exp; e++){
- int a= 1<<e;
-
- if(get_cabac(c, state + 1 + e)==0){ // 1..8
- for(i=e-1; i>=0; i--){
- a += get_cabac(c, state+16+e+i)<<i; //17..29
- }
-
- if(is_signed && get_cabac(c, state+9 + e)) //9..16
- return -a;
- else
- return a;
- }
- }
- return -(1<<e);
- }
-}
-
-static inline void update_vlc_state(VlcState * const state, const int v){
- int drift= state->drift;
- int count= state->count;
- state->error_sum += ABS(v);
- drift += v;
-
- if(count == 128){ //FIXME variable
- count >>= 1;
- drift >>= 1;
- state->error_sum >>= 1;
- }
- count++;
-
- if(drift <= -count){
- if(state->bias > -128) state->bias--;
-
- drift += count;
- if(drift <= -count)
- drift= -count + 1;
- }else if(drift > 0){
- if(state->bias < 127) state->bias++;
-
- drift -= count;
- if(drift > 0)
- drift= 0;
- }
-
- state->drift= drift;
- state->count= count;
-}
-
-static inline void put_vlc_symbol(PutBitContext *pb, VlcState * const state, int v){
- int i, k, code;
-//printf("final: %d ", v);
- v = (int8_t)(v - state->bias);
-
- i= state->count;
- k=0;
- while(i < state->error_sum){ //FIXME optimize
- k++;
- i += i;
- }
-
- assert(k<=8);
-
-#if 0 // JPEG LS
- if(k==0 && 2*state->drift <= - state->count) code= v ^ (-1);
- else code= v;
-#else
- code= v ^ ((2*state->drift + state->count)>>31);
-#endif
-
- code = -2*code-1;
- code^= (code>>31);
-//printf("v:%d/%d bias:%d error:%d drift:%d count:%d k:%d\n", v, code, state->bias, state->error_sum, state->drift, state->count, k);
- set_ur_golomb(pb, code, k, 12, 8);
-
- update_vlc_state(state, v);
-}
-
-static inline int get_vlc_symbol(GetBitContext *gb, VlcState * const state){
- int k, i, v, ret;
-
- i= state->count;
- k=0;
- while(i < state->error_sum){ //FIXME optimize
- k++;
- i += i;
- }
-
- assert(k<=8);
-
- v= get_ur_golomb(gb, k, 12, 8);
-//printf("v:%d bias:%d error:%d drift:%d count:%d k:%d", v, state->bias, state->error_sum, state->drift, state->count, k);
-
- v++;
- if(v&1) v= (v>>1);
- else v= -(v>>1);
-
-#if 0 // JPEG LS
- if(k==0 && 2*state->drift <= - state->count) v ^= (-1);
-#else
- v ^= ((2*state->drift + state->count)>>31);
-#endif
-
- ret= (int8_t)(v + state->bias);
-
- update_vlc_state(state, v);
-//printf("final: %d\n", ret);
- return ret;
-}
-
-
-
-static void encode_plane(FFV1Context *s, uint8_t *src, int w, int h, int stride, int plane_index){
- PlaneContext * const p= &s->plane[plane_index];
- CABACContext * const c= &s->c;
- int x,y;
- uint8_t sample_buffer[2][w+6];
- uint8_t *sample[2]= {sample_buffer[0]+3, sample_buffer[1]+3};
- int run_index=0;
-
- memset(sample_buffer, 0, sizeof(sample_buffer));
-
- for(y=0; y<h; y++){
- uint8_t *temp= sample[0]; //FIXME try a normal buffer
- int run_count=0;
- int run_mode=0;
-
- sample[0]= sample[1];
- sample[1]= temp;
-
- sample[1][-1]= sample[0][0 ];
- sample[0][ w]= sample[0][w-1];
-
- for(x=0; x<w; x++){
- uint8_t *temp_src= src + x + stride*y;
- int diff, context;
-
- context= get_context(s, sample[1]+x, sample[0]+x, sample[1]+x);
- diff= temp_src[0] - predict(sample[1]+x, sample[0]+x);
-
- if(context < 0){
- context = -context;
- diff= -diff;
- }
-
- diff= (int8_t)diff;
-
- if(s->ac){
- put_symbol(c, p->state[context], diff, 1, 7);
- }else{
- if(context == 0) run_mode=1;
-
- if(run_mode){
-
- if(diff){
- while(run_count >= 1<<log2_run[run_index]){
- run_count -= 1<<log2_run[run_index];
- run_index++;
- put_bits(&s->pb, 1, 1);
- }
-
- put_bits(&s->pb, 1 + log2_run[run_index], run_count);
- if(run_index) run_index--;
- run_count=0;
- run_mode=0;
- if(diff>0) diff--;
- }else{
- run_count++;
- }
- }
-
-// printf("count:%d index:%d, mode:%d, x:%d y:%d pos:%d\n", run_count, run_index, run_mode, x, y, (int)get_bit_count(&s->pb));
-
- if(run_mode == 0)
- put_vlc_symbol(&s->pb, &p->vlc_state[context], diff);
- }
-
- sample[1][x]= temp_src[0];
- }
- if(run_mode){
- while(run_count >= 1<<log2_run[run_index]){
- run_count -= 1<<log2_run[run_index];
- run_index++;
- put_bits(&s->pb, 1, 1);
- }
-
- if(run_count)
- put_bits(&s->pb, 1, 1);
- }
- }
-}
-
-static void write_quant_table(CABACContext *c, int16_t *quant_table){
- int last=0;
- int i;
- uint8_t state[CONTEXT_SIZE]={0};
-
- for(i=1; i<128 ; i++){
- if(quant_table[i] != quant_table[i-1]){
- put_symbol(c, state, i-last-1, 0, 7);
- last= i;
- }
- }
- put_symbol(c, state, i-last-1, 0, 7);
-}
-
-static void write_header(FFV1Context *f){
- uint8_t state[CONTEXT_SIZE]={0};
- int i;
- CABACContext * const c= &f->c;
-
- put_symbol(c, state, f->version, 0, 7);
- put_symbol(c, state, f->avctx->coder_type, 0, 7);
- put_symbol(c, state, 0, 0, 7); //YUV cs type
- put_cabac(c, state, 1); //chroma planes
- put_symbol(c, state, f->chroma_h_shift, 0, 7);
- put_symbol(c, state, f->chroma_v_shift, 0, 7);
- put_cabac(c, state, 0); //no transparency plane
-
- for(i=0; i<5; i++)
- write_quant_table(c, f->quant_table[i]);
-}
-
-static int common_init(AVCodecContext *avctx){
- FFV1Context *s = avctx->priv_data;
- int width, height;
-
- s->avctx= avctx;
- s->flags= avctx->flags;
-
- dsputil_init(&s->dsp, avctx);
-
- width= s->width= avctx->width;
- height= s->height= avctx->height;
-
- assert(width && height);
-
- return 0;
-}
-
-static int encode_init(AVCodecContext *avctx)
-{
- FFV1Context *s = avctx->priv_data;
- int i;
-
- common_init(avctx);
-
- s->version=0;
- s->ac= avctx->coder_type;
-
- s->plane_count=2;
- for(i=0; i<256; i++){
- s->quant_table[0][i]= quant11[i];
- s->quant_table[1][i]= 11*quant11[i];
- if(avctx->context_model==0){
- s->quant_table[2][i]= 11*11*quant11[i];
- s->quant_table[3][i]=
- s->quant_table[4][i]=0;
- }else{
- s->quant_table[2][i]= 11*11*quant5 [i];
- s->quant_table[3][i]= 5*11*11*quant5 [i];
- s->quant_table[4][i]= 5*5*11*11*quant5 [i];
- }
- }
-
- for(i=0; i<s->plane_count; i++){
- PlaneContext * const p= &s->plane[i];
-
- if(avctx->context_model==0){
- p->context_count= (11*11*11+1)/2;
- }else{
- p->context_count= (11*11*5*5*5+1)/2;
- }
-
- if(s->ac){
- if(!p->state) p->state= av_malloc(CONTEXT_SIZE*p->context_count*sizeof(uint8_t));
- }else{
- if(!p->vlc_state) p->vlc_state= av_malloc(p->context_count*sizeof(VlcState));
- }
- }
-
- avctx->coded_frame= &s->picture;
- switch(avctx->pix_fmt){
- case PIX_FMT_YUV444P:
- case PIX_FMT_YUV422P:
- case PIX_FMT_YUV420P:
- case PIX_FMT_YUV411P:
- case PIX_FMT_YUV410P:
- avcodec_get_chroma_sub_sample(avctx->pix_fmt, &s->chroma_h_shift, &s->chroma_v_shift);
- break;
- default:
- fprintf(stderr, "format not supported\n");
- return -1;
- }
-
-
- s->picture_number=0;
-
- return 0;
-}
-
-
-static void clear_state(FFV1Context *f){
- int i, j;
-
- for(i=0; i<f->plane_count; i++){
- PlaneContext *p= &f->plane[i];
-
- p->interlace_bit_state[0]= 0;
- p->interlace_bit_state[1]= 0;
-
- for(j=0; j<p->context_count; j++){
- if(f->ac){
- memset(p->state[j], 0, sizeof(uint8_t)*CONTEXT_SIZE);
- p->state[j][7] = 2*62;
- }else{
- p->vlc_state[j].drift= 0;
- p->vlc_state[j].error_sum= 4; //FFMAX((RANGE + 32)/64, 2);
- p->vlc_state[j].bias= 0;
- p->vlc_state[j].count= 1;
- }
- }
- }
-}
-
-static int encode_frame(AVCodecContext *avctx, unsigned char *buf, int buf_size, void *data){
- FFV1Context *f = avctx->priv_data;
- CABACContext * const c= &f->c;
- AVFrame *pict = data;
- const int width= f->width;
- const int height= f->height;
- AVFrame * const p= &f->picture;
- int used_count= 0;
-
- if(avctx->strict_std_compliance >= 0){
- printf("this codec is under development, files encoded with it wont be decodeable with future versions!!!\n"
- "use vstrict=-1 to use it anyway\n");
- return -1;
- }
-
- ff_init_cabac_encoder(c, buf, buf_size);
- ff_init_cabac_states(c, ff_h264_lps_range, ff_h264_mps_state, ff_h264_lps_state, 64);
-
- *p = *pict;
- p->pict_type= FF_I_TYPE;
-
- if(avctx->gop_size==0 || f->picture_number % avctx->gop_size == 0){
- put_cabac_bypass(c, 1);
- p->key_frame= 1;
- write_header(f);
- clear_state(f);
- }else{
- put_cabac_bypass(c, 0);
- p->key_frame= 0;
- }
-
- if(!f->ac){
- used_count += put_cabac_terminate(c, 1);
-//printf("pos=%d\n", used_count);
- init_put_bits(&f->pb, buf + used_count, buf_size - used_count, NULL, NULL);
- }
-
- if(1){
- const int chroma_width = -((-width )>>f->chroma_h_shift);
- const int chroma_height= -((-height)>>f->chroma_v_shift);
-
- encode_plane(f, p->data[0], width, height, p->linesize[0], 0);
-
- encode_plane(f, p->data[1], chroma_width, chroma_height, p->linesize[1], 1);
- encode_plane(f, p->data[2], chroma_width, chroma_height, p->linesize[2], 1);
- }
- emms_c();
-
- f->picture_number++;
-
- if(f->ac){
- return put_cabac_terminate(c, 1);
- }else{
- flush_put_bits(&f->pb); //nicer padding FIXME
- return used_count + (get_bit_count(&f->pb)+7)/8;
- }
-}
-
-static void common_end(FFV1Context *s){
- int i;
-
- for(i=0; i<s->plane_count; i++){
- PlaneContext *p= &s->plane[i];
-
- av_freep(&p->state);
- }
-}
-
-static int encode_end(AVCodecContext *avctx)
-{
- FFV1Context *s = avctx->priv_data;
-
- common_end(s);
-
- return 0;
-}
-
-static void decode_plane(FFV1Context *s, uint8_t *src, int w, int h, int stride, int plane_index){
- PlaneContext * const p= &s->plane[plane_index];
- CABACContext * const c= &s->c;
- int x,y;
- uint8_t sample_buffer[2][w+6];
- uint8_t *sample[2]= {sample_buffer[0]+3, sample_buffer[1]+3};
- int run_index=0;
-
- memset(sample_buffer, 0, sizeof(sample_buffer));
-
- for(y=0; y<h; y++){
- uint8_t *temp= sample[0]; //FIXME try a normal buffer
- int run_count=0;
- int run_mode=0;
-
- sample[0]= sample[1];
- sample[1]= temp;
-
- sample[1][-1]= sample[0][0 ];
- sample[0][ w]= sample[0][w-1];
-
- for(x=0; x<w; x++){
- uint8_t *temp_src= src + x + stride*y;
- int diff, context, sign;
-
- context= get_context(s, sample[1] + x, sample[0] + x, sample[1] + x);
- if(context < 0){
- context= -context;
- sign=1;
- }else
- sign=0;
-
-
- if(s->ac)
- diff= get_symbol(c, p->state[context], 1, 7);
- else{
- if(context == 0 && run_mode==0) run_mode=1;
-
- if(run_mode){
- if(run_count==0 && run_mode==1){
- if(get_bits1(&s->gb)){
- run_count = 1<<log2_run[run_index];
- if(x + run_count <= w) run_index++;
- }else{
- if(log2_run[run_index]) run_count = get_bits(&s->gb, log2_run[run_index]);
- else run_count=0;
- if(run_index) run_index--;
- run_mode=2;
- }
- }
- run_count--;
- if(run_count < 0){
- run_mode=0;
- run_count=0;
- diff= get_vlc_symbol(&s->gb, &p->vlc_state[context]);
- if(diff>=0) diff++;
- }else
- diff=0;
- }else
- diff= get_vlc_symbol(&s->gb, &p->vlc_state[context]);
-
-// printf("count:%d index:%d, mode:%d, x:%d y:%d pos:%d\n", run_count, run_index, run_mode, x, y, get_bits_count(&s->gb));
- }
-
- if(sign) diff= (int8_t)(-diff); //FIXME remove cast
-
- sample[1][x]=
- temp_src[0] = predict(sample[1] + x, sample[0] + x) + diff;
-
- assert(diff>= -128 && diff <= 127);
- }
- }
-}
-
-static int read_quant_table(CABACContext *c, int16_t *quant_table, int scale){
- int v;
- int i=0;
- uint8_t state[CONTEXT_SIZE]={0};
-
- for(v=0; i<128 ; v++){
- int len= get_symbol(c, state, 0, 7) + 1;
-
- if(len + i > 128) return -1;
-
- while(len--){
- quant_table[i] = scale*v;
- i++;
-//printf("%2d ",v);
-//if(i%16==0) printf("\n");
- }
- }
-
- for(i=1; i<128; i++){
- quant_table[256-i]= -quant_table[i];
- }
- quant_table[128]= -quant_table[127];
-
- return 2*v - 1;
-}
-
-static int read_header(FFV1Context *f){
- uint8_t state[CONTEXT_SIZE]={0};
- int i, context_count;
- CABACContext * const c= &f->c;
-
- f->version= get_symbol(c, state, 0, 7);
- f->ac= f->avctx->coder_type= get_symbol(c, state, 0, 7);
- get_symbol(c, state, 0, 7); //YUV cs type
- get_cabac(c, state); //no chroma = false
- f->chroma_h_shift= get_symbol(c, state, 0, 7);
- f->chroma_v_shift= get_symbol(c, state, 0, 7);
- get_cabac(c, state); //transparency plane
- f->plane_count= 2;
-
- switch(16*f->chroma_h_shift + f->chroma_v_shift){
- case 0x00: f->avctx->pix_fmt= PIX_FMT_YUV444P; break;
- case 0x10: f->avctx->pix_fmt= PIX_FMT_YUV422P; break;
- case 0x11: f->avctx->pix_fmt= PIX_FMT_YUV420P; break;
- case 0x20: f->avctx->pix_fmt= PIX_FMT_YUV411P; break;
- case 0x33: f->avctx->pix_fmt= PIX_FMT_YUV410P; break;
- default:
- fprintf(stderr, "format not supported\n");
- return -1;
- }
-//printf("%d %d %d\n", f->chroma_h_shift, f->chroma_v_shift,f->avctx->pix_fmt);
-
- context_count=1;
- for(i=0; i<5; i++){
- context_count*= read_quant_table(c, f->quant_table[i], context_count);
- if(context_count < 0){
- printf("read_quant_table error\n");
- return -1;
- }
- }
- context_count= (context_count+1)/2;
-
- for(i=0; i<f->plane_count; i++){
- PlaneContext * const p= &f->plane[i];
-
- p->context_count= context_count;
-
- if(f->ac){
- if(!p->state) p->state= av_malloc(CONTEXT_SIZE*p->context_count*sizeof(uint8_t));
- }else{
- if(!p->vlc_state) p->vlc_state= av_malloc(p->context_count*sizeof(VlcState));
- }
- }
-
- return 0;
-}
-
-static int decode_init(AVCodecContext *avctx)
-{
-// FFV1Context *s = avctx->priv_data;
-
- common_init(avctx);
-
-#if 0
- switch(s->bitstream_bpp){
- case 12:
- avctx->pix_fmt = PIX_FMT_YUV420P;
- break;
- case 16:
- avctx->pix_fmt = PIX_FMT_YUV422P;
- break;
- case 24:
- case 32:
- if(s->bgr32){
- avctx->pix_fmt = PIX_FMT_RGBA32;
- }else{
- avctx->pix_fmt = PIX_FMT_BGR24;
- }
- break;
- default:
- assert(0);
- }
-#endif
-
- return 0;
-}
-
-static int decode_frame(AVCodecContext *avctx, void *data, int *data_size, uint8_t *buf, int buf_size){
- FFV1Context *f = avctx->priv_data;
- CABACContext * const c= &f->c;
- const int width= f->width;
- const int height= f->height;
- AVFrame * const p= &f->picture;
- int bytes_read;
-
- AVFrame *picture = data;
-
- *data_size = 0;
-
- /* no supplementary picture */
- if (buf_size == 0)
- return 0;
-
- ff_init_cabac_decoder(c, buf, buf_size);
- ff_init_cabac_states(c, ff_h264_lps_range, ff_h264_mps_state, ff_h264_lps_state, 64);
-
- p->pict_type= FF_I_TYPE; //FIXME I vs. P
- if(get_cabac_bypass(c)){
- p->key_frame= 1;
- read_header(f);
- clear_state(f);
- }else{
- p->key_frame= 0;
- }
-
- p->reference= 0;
- if(avctx->get_buffer(avctx, p) < 0){
- fprintf(stderr, "get_buffer() failed\n");
- return -1;
- }
-
- if(avctx->debug&FF_DEBUG_PICT_INFO)
- printf("keyframe:%d coder:%d\n", p->key_frame, f->ac);
-
- if(!f->ac){
- bytes_read = get_cabac_terminate(c);
- if(bytes_read ==0) printf("error at end of AC stream\n");
-//printf("pos=%d\n", bytes_read);
- init_get_bits(&f->gb, buf + bytes_read, buf_size - bytes_read);
- } else {
- bytes_read = 0; /* avoid warning */
- }
-
- if(1){
- const int chroma_width = -((-width )>>f->chroma_h_shift);
- const int chroma_height= -((-height)>>f->chroma_v_shift);
- decode_plane(f, p->data[0], width, height, p->linesize[0], 0);
-
- decode_plane(f, p->data[1], chroma_width, chroma_height, p->linesize[1], 1);
- decode_plane(f, p->data[2], chroma_width, chroma_height, p->linesize[2], 1);
- }
-
- emms_c();
-
- f->picture_number++;
-
- *picture= *p;
-
- avctx->release_buffer(avctx, p); //FIXME
-
- *data_size = sizeof(AVFrame);
-
- if(f->ac){
- bytes_read= get_cabac_terminate(c);
- if(bytes_read ==0) printf("error at end of frame\n");
- }else{
- bytes_read+= (get_bits_count(&f->gb)+7)/8;
- }
-
- return bytes_read;
-}
-
-static int decode_end(AVCodecContext *avctx)
-{
- FFV1Context *s = avctx->priv_data;
- int i;
-
- if(avctx->get_buffer == avcodec_default_get_buffer){
- for(i=0; i<4; i++){
- av_freep(&s->picture.base[i]);
- s->picture.data[i]= NULL;
- }
- av_freep(&s->picture.opaque);
- }
-
- return 0;
-}
-
-AVCodec ffv1_decoder = {
- "ffv1",
- CODEC_TYPE_VIDEO,
- CODEC_ID_FFV1,
- sizeof(FFV1Context),
- decode_init,
- NULL,
- decode_end,
- decode_frame,
- CODEC_CAP_DR1 /*| CODEC_CAP_DRAW_HORIZ_BAND*/,
- NULL
-};
-
-#ifdef CONFIG_ENCODERS
-AVCodec ffv1_encoder = {
- "ffv1",
- CODEC_TYPE_VIDEO,
- CODEC_ID_FFV1,
- sizeof(FFV1Context),
- encode_init,
- encode_frame,
- encode_end,
-};
-#endif
projects / synfig.git / blobdiff