| /* |
| * FFV1 codec for libavcodec |
| * |
| * 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 libavcodec/ffv1.c |
| * FF Video Codec 1 (an experimental lossless codec) |
| */ |
| |
| #include "avcodec.h" |
| #include "bitstream.h" |
| #include "dsputil.h" |
| #include "rangecoder.h" |
| #include "golomb.h" |
| #include "mathops.h" |
| |
| #define MAX_PLANES 4 |
| #define CONTEXT_SIZE 32 |
| |
| extern const uint8_t ff_log2_run[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, |
| }; |
| |
| 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; |
| RangeCoder 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]; |
| int run_index; |
| int colorspace; |
| |
| DSPContext dsp; |
| }FFV1Context; |
| |
| static av_always_inline int fold(int diff, int bits){ |
| if(bits==8) |
| diff= (int8_t)diff; |
| else{ |
| diff+= 1<<(bits-1); |
| diff&=(1<<bits)-1; |
| diff-= 1<<(bits-1); |
| } |
| |
| return diff; |
| } |
| |
| static inline int predict(int_fast16_t *src, int_fast16_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, int_fast16_t *src, int_fast16_t *last, int_fast16_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]; |
| } |
| |
| static inline void put_symbol(RangeCoder *c, uint8_t *state, int v, int is_signed){ |
| int i; |
| |
| if(v){ |
| const int a= FFABS(v); |
| const int e= av_log2(a); |
| put_rac(c, state+0, 0); |
| |
| assert(e<=9); |
| |
| for(i=0; i<e; i++){ |
| put_rac(c, state+1+i, 1); //1..10 |
| } |
| put_rac(c, state+1+i, 0); |
| |
| for(i=e-1; i>=0; i--){ |
| put_rac(c, state+22+i, (a>>i)&1); //22..31 |
| } |
| |
| if(is_signed) |
| put_rac(c, state+11 + e, v < 0); //11..21 |
| }else{ |
| put_rac(c, state+0, 1); |
| } |
| } |
| |
| static inline int get_symbol(RangeCoder *c, uint8_t *state, int is_signed){ |
| if(get_rac(c, state+0)) |
| return 0; |
| else{ |
| int i, e, a; |
| e= 0; |
| while(get_rac(c, state+1 + e) && e<9){ //1..10 |
| e++; |
| } |
| |
| a= 1; |
| for(i=e-1; i>=0; i--){ |
| a += a + get_rac(c, state+22 + i); //22..31 |
| } |
| |
| if(is_signed && get_rac(c, state+11 + e)) //11..21 |
| return -a; |
| else |
| return a; |
| } |
| } |
| |
| static inline void update_vlc_state(VlcState * const state, const int v){ |
| int drift= state->drift; |
| int count= state->count; |
| state->error_sum += FFABS(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 bits){ |
| int i, k, code; |
| //printf("final: %d ", v); |
| v = fold(v - state->bias, bits); |
| |
| 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 |
| |
| //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_sr_golomb(pb, code, k, 12, bits); |
| |
| update_vlc_state(state, v); |
| } |
| |
| static inline int get_vlc_symbol(GetBitContext *gb, VlcState * const state, int bits){ |
| 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_sr_golomb(gb, k, 12, bits); |
| //printf("v:%d bias:%d error:%d drift:%d count:%d k:%d", v, state->bias, state->error_sum, state->drift, state->count, k); |
| |
| #if 0 // JPEG LS |
| if(k==0 && 2*state->drift <= - state->count) v ^= (-1); |
| #else |
| v ^= ((2*state->drift + state->count)>>31); |
| #endif |
| |
| ret= fold(v + state->bias, bits); |
| |
| update_vlc_state(state, v); |
| //printf("final: %d\n", ret); |
| return ret; |
| } |
| |
| #if CONFIG_FFV1_ENCODER |
| static inline int encode_line(FFV1Context *s, int w, int_fast16_t *sample[2], int plane_index, int bits){ |
| PlaneContext * const p= &s->plane[plane_index]; |
| RangeCoder * const c= &s->c; |
| int x; |
| int run_index= s->run_index; |
| int run_count=0; |
| int run_mode=0; |
| |
| if(s->ac){ |
| if(c->bytestream_end - c->bytestream < w*35){ |
| av_log(s->avctx, AV_LOG_ERROR, "encoded frame too large\n"); |
| return -1; |
| } |
| }else{ |
| if(s->pb.buf_end - s->pb.buf - (put_bits_count(&s->pb)>>3) < w*4){ |
| av_log(s->avctx, AV_LOG_ERROR, "encoded frame too large\n"); |
| return -1; |
| } |
| } |
| |
| for(x=0; x<w; x++){ |
| int diff, context; |
| |
| context= get_context(s, sample[0]+x, sample[1]+x, sample[2]+x); |
| diff= sample[0][x] - predict(sample[0]+x, sample[1]+x); |
| |
| if(context < 0){ |
| context = -context; |
| diff= -diff; |
| } |
| |
| diff= fold(diff, bits); |
| |
| if(s->ac){ |
| put_symbol(c, p->state[context], diff, 1); |
| }else{ |
| if(context == 0) run_mode=1; |
| |
| if(run_mode){ |
| |
| if(diff){ |
| while(run_count >= 1<<ff_log2_run[run_index]){ |
| run_count -= 1<<ff_log2_run[run_index]; |
| run_index++; |
| put_bits(&s->pb, 1, 1); |
| } |
| |
| put_bits(&s->pb, 1 + ff_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)put_bits_count(&s->pb)); |
| |
| if(run_mode == 0) |
| put_vlc_symbol(&s->pb, &p->vlc_state[context], diff, bits); |
| } |
| } |
| if(run_mode){ |
| while(run_count >= 1<<ff_log2_run[run_index]){ |
| run_count -= 1<<ff_log2_run[run_index]; |
| run_index++; |
| put_bits(&s->pb, 1, 1); |
| } |
| |
| if(run_count) |
| put_bits(&s->pb, 1, 1); |
| } |
| s->run_index= run_index; |
| |
| return 0; |
| } |
| |
| static void encode_plane(FFV1Context *s, uint8_t *src, int w, int h, int stride, int plane_index){ |
| int x,y,i; |
| const int ring_size= s->avctx->context_model ? 3 : 2; |
| int_fast16_t sample_buffer[ring_size][w+6], *sample[ring_size]; |
| s->run_index=0; |
| |
| memset(sample_buffer, 0, sizeof(sample_buffer)); |
| |
| for(y=0; y<h; y++){ |
| for(i=0; i<ring_size; i++) |
| sample[i]= sample_buffer[(h+i-y)%ring_size]+3; |
| |
| sample[0][-1]= sample[1][0 ]; |
| sample[1][ w]= sample[1][w-1]; |
| //{START_TIMER |
| for(x=0; x<w; x++){ |
| sample[0][x]= src[x + stride*y]; |
| } |
| encode_line(s, w, sample, plane_index, 8); |
| //STOP_TIMER("encode line")} |
| } |
| } |
| |
| static void encode_rgb_frame(FFV1Context *s, uint32_t *src, int w, int h, int stride){ |
| int x, y, p, i; |
| const int ring_size= s->avctx->context_model ? 3 : 2; |
| int_fast16_t sample_buffer[3][ring_size][w+6], *sample[3][ring_size]; |
| s->run_index=0; |
| |
| memset(sample_buffer, 0, sizeof(sample_buffer)); |
| |
| for(y=0; y<h; y++){ |
| for(i=0; i<ring_size; i++) |
| for(p=0; p<3; p++) |
| sample[p][i]= sample_buffer[p][(h+i-y)%ring_size]+3; |
| |
| for(x=0; x<w; x++){ |
| int v= src[x + stride*y]; |
| int b= v&0xFF; |
| int g= (v>>8)&0xFF; |
| int r= (v>>16)&0xFF; |
| |
| b -= g; |
| r -= g; |
| g += (b + r)>>2; |
| b += 0x100; |
| r += 0x100; |
| |
| // assert(g>=0 && b>=0 && r>=0); |
| // assert(g<256 && b<512 && r<512); |
| sample[0][0][x]= g; |
| sample[1][0][x]= b; |
| sample[2][0][x]= r; |
| } |
| for(p=0; p<3; p++){ |
| sample[p][0][-1]= sample[p][1][0 ]; |
| sample[p][1][ w]= sample[p][1][w-1]; |
| encode_line(s, w, sample[p], FFMIN(p, 1), 9); |
| } |
| } |
| } |
| |
| static void write_quant_table(RangeCoder *c, int16_t *quant_table){ |
| int last=0; |
| int i; |
| uint8_t state[CONTEXT_SIZE]; |
| memset(state, 128, sizeof(state)); |
| |
| for(i=1; i<128 ; i++){ |
| if(quant_table[i] != quant_table[i-1]){ |
| put_symbol(c, state, i-last-1, 0); |
| last= i; |
| } |
| } |
| put_symbol(c, state, i-last-1, 0); |
| } |
| |
| static void write_header(FFV1Context *f){ |
| uint8_t state[CONTEXT_SIZE]; |
| int i; |
| RangeCoder * const c= &f->c; |
| |
| memset(state, 128, sizeof(state)); |
| |
| put_symbol(c, state, f->version, 0); |
| put_symbol(c, state, f->avctx->coder_type, 0); |
| put_symbol(c, state, f->colorspace, 0); //YUV cs type |
| put_rac(c, state, 1); //chroma planes |
| put_symbol(c, state, f->chroma_h_shift, 0); |
| put_symbol(c, state, f->chroma_v_shift, 0); |
| put_rac(c, state, 0); //no transparency plane |
| |
| for(i=0; i<5; i++) |
| write_quant_table(c, f->quant_table[i]); |
| } |
| #endif /* CONFIG_FFV1_ENCODER */ |
| |
| static av_cold 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; |
| } |
| |
| #if CONFIG_FFV1_ENCODER |
| static av_cold 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: |
| s->colorspace= 0; |
| break; |
| case PIX_FMT_RGB32: |
| s->colorspace= 1; |
| break; |
| default: |
| av_log(avctx, AV_LOG_ERROR, "format not supported\n"); |
| return -1; |
| } |
| avcodec_get_chroma_sub_sample(avctx->pix_fmt, &s->chroma_h_shift, &s->chroma_v_shift); |
| |
| s->picture_number=0; |
| |
| return 0; |
| } |
| #endif /* CONFIG_FFV1_ENCODER */ |
| |
| |
| 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]= 128; |
| p->interlace_bit_state[1]= 128; |
| |
| for(j=0; j<p->context_count; j++){ |
| if(f->ac){ |
| memset(p->state[j], 128, sizeof(uint8_t)*CONTEXT_SIZE); |
| }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; |
| } |
| } |
| } |
| } |
| |
| #if CONFIG_FFV1_ENCODER |
| static int encode_frame(AVCodecContext *avctx, unsigned char *buf, int buf_size, void *data){ |
| FFV1Context *f = avctx->priv_data; |
| RangeCoder * 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; |
| uint8_t keystate=128; |
| |
| ff_init_range_encoder(c, buf, buf_size); |
| // ff_init_cabac_states(c, ff_h264_lps_range, ff_h264_mps_state, ff_h264_lps_state, 64); |
| ff_build_rac_states(c, 0.05*(1LL<<32), 256-8); |
| |
| *p = *pict; |
| p->pict_type= FF_I_TYPE; |
| |
| if(avctx->gop_size==0 || f->picture_number % avctx->gop_size == 0){ |
| put_rac(c, &keystate, 1); |
| p->key_frame= 1; |
| write_header(f); |
| clear_state(f); |
| }else{ |
| put_rac(c, &keystate, 0); |
| p->key_frame= 0; |
| } |
| |
| if(!f->ac){ |
| used_count += ff_rac_terminate(c); |
| //printf("pos=%d\n", used_count); |
| init_put_bits(&f->pb, buf + used_count, buf_size - used_count); |
| } |
| |
| if(f->colorspace==0){ |
| 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); |
| }else{ |
| encode_rgb_frame(f, (uint32_t*)(p->data[0]), width, height, p->linesize[0]/4); |
| } |
| emms_c(); |
| |
| f->picture_number++; |
| |
| if(f->ac){ |
| return ff_rac_terminate(c); |
| }else{ |
| flush_put_bits(&f->pb); //nicer padding FIXME |
| return used_count + (put_bits_count(&f->pb)+7)/8; |
| } |
| } |
| #endif /* CONFIG_FFV1_ENCODER */ |
| |
| static av_cold int common_end(AVCodecContext *avctx){ |
| FFV1Context *s = avctx->priv_data; |
| int i; |
| |
| for(i=0; i<s->plane_count; i++){ |
| PlaneContext *p= &s->plane[i]; |
| |
| av_freep(&p->state); |
| av_freep(&p->vlc_state); |
| } |
| |
| return 0; |
| } |
| |
| static inline void decode_line(FFV1Context *s, int w, int_fast16_t *sample[2], int plane_index, int bits){ |
| PlaneContext * const p= &s->plane[plane_index]; |
| RangeCoder * const c= &s->c; |
| int x; |
| int run_count=0; |
| int run_mode=0; |
| int run_index= s->run_index; |
| |
| for(x=0; x<w; x++){ |
| 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); |
| }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<<ff_log2_run[run_index]; |
| if(x + run_count <= w) run_index++; |
| }else{ |
| if(ff_log2_run[run_index]) run_count = get_bits(&s->gb, ff_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], bits); |
| if(diff>=0) diff++; |
| }else |
| diff=0; |
| }else |
| diff= get_vlc_symbol(&s->gb, &p->vlc_state[context], bits); |
| |
| // 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= -diff; |
| |
| sample[1][x]= (predict(sample[1] + x, sample[0] + x) + diff) & ((1<<bits)-1); |
| } |
| s->run_index= run_index; |
| } |
| |
| static void decode_plane(FFV1Context *s, uint8_t *src, int w, int h, int stride, int plane_index){ |
| int x, y; |
| int_fast16_t sample_buffer[2][w+6]; |
| int_fast16_t *sample[2]; |
| sample[0]=sample_buffer[0]+3; |
| sample[1]=sample_buffer[1]+3; |
| |
| s->run_index=0; |
| |
| memset(sample_buffer, 0, sizeof(sample_buffer)); |
| |
| for(y=0; y<h; y++){ |
| int_fast16_t *temp= sample[0]; //FIXME try a normal buffer |
| |
| sample[0]= sample[1]; |
| sample[1]= temp; |
| |
| sample[1][-1]= sample[0][0 ]; |
| sample[0][ w]= sample[0][w-1]; |
| |
| //{START_TIMER |
| decode_line(s, w, sample, plane_index, 8); |
| for(x=0; x<w; x++){ |
| src[x + stride*y]= sample[1][x]; |
| } |
| //STOP_TIMER("decode-line")} |
| } |
| } |
| |
| static void decode_rgb_frame(FFV1Context *s, uint32_t *src, int w, int h, int stride){ |
| int x, y, p; |
| int_fast16_t sample_buffer[3][2][w+6]; |
| int_fast16_t *sample[3][2]; |
| for(x=0; x<3; x++){ |
| sample[x][0] = sample_buffer[x][0]+3; |
| sample[x][1] = sample_buffer[x][1]+3; |
| } |
| |
| s->run_index=0; |
| |
| memset(sample_buffer, 0, sizeof(sample_buffer)); |
| |
| for(y=0; y<h; y++){ |
| for(p=0; p<3; p++){ |
| int_fast16_t *temp= sample[p][0]; //FIXME try a normal buffer |
| |
| sample[p][0]= sample[p][1]; |
| sample[p][1]= temp; |
| |
| sample[p][1][-1]= sample[p][0][0 ]; |
| sample[p][0][ w]= sample[p][0][w-1]; |
| decode_line(s, w, sample[p], FFMIN(p, 1), 9); |
| } |
| for(x=0; x<w; x++){ |
| int g= sample[0][1][x]; |
| int b= sample[1][1][x]; |
| int r= sample[2][1][x]; |
| |
| // assert(g>=0 && b>=0 && r>=0); |
| // assert(g<256 && b<512 && r<512); |
| |
| b -= 0x100; |
| r -= 0x100; |
| g -= (b + r)>>2; |
| b += g; |
| r += g; |
| |
| src[x + stride*y]= b + (g<<8) + (r<<16); |
| } |
| } |
| } |
| |
| static int read_quant_table(RangeCoder *c, int16_t *quant_table, int scale){ |
| int v; |
| int i=0; |
| uint8_t state[CONTEXT_SIZE]; |
| |
| memset(state, 128, sizeof(state)); |
| |
| for(v=0; i<128 ; v++){ |
| int len= get_symbol(c, state, 0) + 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]; |
| int i, context_count; |
| RangeCoder * const c= &f->c; |
| |
| memset(state, 128, sizeof(state)); |
| |
| f->version= get_symbol(c, state, 0); |
| f->ac= f->avctx->coder_type= get_symbol(c, state, 0); |
| f->colorspace= get_symbol(c, state, 0); //YUV cs type |
| get_rac(c, state); //no chroma = false |
| f->chroma_h_shift= get_symbol(c, state, 0); |
| f->chroma_v_shift= get_symbol(c, state, 0); |
| get_rac(c, state); //transparency plane |
| f->plane_count= 2; |
| |
| if(f->colorspace==0){ |
| 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 0x22: f->avctx->pix_fmt= PIX_FMT_YUV410P; break; |
| default: |
| av_log(f->avctx, AV_LOG_ERROR, "format not supported\n"); |
| return -1; |
| } |
| }else if(f->colorspace==1){ |
| if(f->chroma_h_shift || f->chroma_v_shift){ |
| av_log(f->avctx, AV_LOG_ERROR, "chroma subsampling not supported in this colorspace\n"); |
| return -1; |
| } |
| f->avctx->pix_fmt= PIX_FMT_RGB32; |
| }else{ |
| av_log(f->avctx, AV_LOG_ERROR, "colorspace 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 || context_count > 32768){ |
| av_log(f->avctx, AV_LOG_ERROR, "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 av_cold int decode_init(AVCodecContext *avctx) |
| { |
| // FFV1Context *s = avctx->priv_data; |
| |
| common_init(avctx); |
| |
| return 0; |
| } |
| |
| static int decode_frame(AVCodecContext *avctx, void *data, int *data_size, const uint8_t *buf, int buf_size){ |
| FFV1Context *f = avctx->priv_data; |
| RangeCoder * const c= &f->c; |
| const int width= f->width; |
| const int height= f->height; |
| AVFrame * const p= &f->picture; |
| int bytes_read; |
| uint8_t keystate= 128; |
| |
| AVFrame *picture = data; |
| |
| ff_init_range_decoder(c, buf, buf_size); |
| ff_build_rac_states(c, 0.05*(1LL<<32), 256-8); |
| |
| |
| p->pict_type= FF_I_TYPE; //FIXME I vs. P |
| if(get_rac(c, &keystate)){ |
| p->key_frame= 1; |
| if(read_header(f) < 0) |
| return -1; |
| clear_state(f); |
| }else{ |
| p->key_frame= 0; |
| } |
| if(!f->plane[0].state && !f->plane[0].vlc_state) |
| return -1; |
| |
| p->reference= 0; |
| if(avctx->get_buffer(avctx, p) < 0){ |
| av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n"); |
| return -1; |
| } |
| |
| if(avctx->debug&FF_DEBUG_PICT_INFO) |
| av_log(avctx, AV_LOG_ERROR, "keyframe:%d coder:%d\n", p->key_frame, f->ac); |
| |
| if(!f->ac){ |
| bytes_read = c->bytestream - c->bytestream_start - 1; |
| if(bytes_read ==0) av_log(avctx, AV_LOG_ERROR, "error at end of AC stream\n"); //FIXME |
| //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(f->colorspace==0){ |
| 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); |
| }else{ |
| decode_rgb_frame(f, (uint32_t*)p->data[0], width, height, p->linesize[0]/4); |
| } |
| |
| emms_c(); |
| |
| f->picture_number++; |
| |
| *picture= *p; |
| |
| avctx->release_buffer(avctx, p); //FIXME |
| |
| *data_size = sizeof(AVFrame); |
| |
| if(f->ac){ |
| bytes_read= c->bytestream - c->bytestream_start - 1; |
| if(bytes_read ==0) av_log(f->avctx, AV_LOG_ERROR, "error at end of frame\n"); |
| }else{ |
| bytes_read+= (get_bits_count(&f->gb)+7)/8; |
| } |
| |
| return bytes_read; |
| } |
| |
| AVCodec ffv1_decoder = { |
| "ffv1", |
| CODEC_TYPE_VIDEO, |
| CODEC_ID_FFV1, |
| sizeof(FFV1Context), |
| decode_init, |
| NULL, |
| common_end, |
| decode_frame, |
| CODEC_CAP_DR1 /*| CODEC_CAP_DRAW_HORIZ_BAND*/, |
| NULL, |
| .long_name= NULL_IF_CONFIG_SMALL("FFmpeg codec #1"), |
| }; |
| |
| #if CONFIG_FFV1_ENCODER |
| AVCodec ffv1_encoder = { |
| "ffv1", |
| CODEC_TYPE_VIDEO, |
| CODEC_ID_FFV1, |
| sizeof(FFV1Context), |
| encode_init, |
| encode_frame, |
| common_end, |
| .pix_fmts= (enum PixelFormat[]){PIX_FMT_YUV420P, PIX_FMT_YUV444P, PIX_FMT_YUV422P, PIX_FMT_YUV411P, PIX_FMT_YUV410P, PIX_FMT_RGB32, PIX_FMT_NONE}, |
| .long_name= NULL_IF_CONFIG_SMALL("FFmpeg codec #1"), |
| }; |
| #endif |
