--- /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"
+
+#define MAX_PLANES 4
+#if 0
+#define DEFAULT_QDIFF_COUNT (9)
+
+static const uint8_t default_quant_table[512]={
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 3, 3,
+ 4,
+ 5, 5, 6, 6, 6, 6, 7, 7, 7, 7, 7, 7, 7, 7, 8, 8,
+ 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
+ 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
+ 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
+ 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
+ 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
+ 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
+ 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
+};
+#else
+#define DEFAULT_QDIFF_COUNT (16)
+
+static const uint8_t default_quant_table[256]={
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 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,
+ 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
+ 3, 3, 3, 3, 3, 3, 3, 3, 4, 4, 4, 4, 5, 5, 6, 7,
+8,
+ 9,10,11,11,12,12,12,12,13,13,13,13,13,13,13,13,
+14,14,14,14,14,14,14,14,14,14,14,14,14,14,14,14,
+15,15,15,15,15,15,15,15,15,15,15,15,15,15,15,15,
+15,15,15,15,15,15,15,15,15,15,15,15,15,15,15,15,
+15,15,15,15,15,15,15,15,15,15,15,15,15,15,15,15,
+15,15,15,15,15,15,15,15,15,15,15,15,15,15,15,15,
+15,15,15,15,15,15,15,15,15,15,15,15,15,15,15,15,
+15,15,15,15,15,15,15,15,15,15,15,15,15,15,15,
+ };
+#endif
+
+static const int to8[16]={
+0,1,1,1,
+1,2,2,3,
+4,5,6,6,
+7,7,7,7
+};
+
+typedef struct PlaneContext{
+ uint8_t quant_table[256];
+ int qdiff_count;
+ int context_count;
+ uint8_t (*state)[64]; //FIXME 64
+ uint8_t interlace_bit_state[2];
+} PlaneContext;
+
+typedef struct FFV1Context{
+ AVCodecContext *avctx;
+ CABACContext c;
+ int version;
+ int width, height;
+ int chroma_h_shift, chroma_v_shift;
+ int flags;
+ int picture_number;
+ AVFrame picture;
+ int plane_count;
+ PlaneContext plane[MAX_PLANES];
+
+ DSPContext dsp;
+}FFV1Context;
+
+ //1.774215
+static inline int predict(FFV1Context *s, uint8_t *src, int stride, int x, int y){
+ if(x && y){
+// const int RT= src[+1-stride];
+ const int LT= src[-1-stride];
+ const int T= src[ -stride];
+ const int L = src[-1 ];
+ uint8_t *cm = cropTbl + MAX_NEG_CROP;
+ const int gradient= cm[L + T - LT];
+
+// return gradient;
+ return mid_pred(L, gradient, T);
+ }else{
+ if(y){
+ return src[ -stride];
+ }else if(x){
+ return src[-1 ];
+ }else{
+ return 128;
+ }
+ }
+}
+
+
+#if 0
+static inline void put_symbol(CABACContext, uint8_t *state, int v){
+ put_cabac_ueg(c, state, v, 32, 1, 4 , 32);
+}
+
+static inline int get_symbol(CABACContext, uint8_t *state){
+ return get_cabac_ueg(c, state, 32, 1, 4 , 32);
+}
+#elif 0
+static inline void put_symbol(CABACContext *c, uint8_t *state, int v){
+ if(v==0)
+ put_cabac(c, state+0, 1);
+ else{
+ put_cabac(c, state+0, 0);
+ put_cabac(c, state+1, v<0);
+ if(v<0) state += 64;
+ put_cabac_ueg(c, state+2, ABS(v)-1, 32, 0, 4 , 32);
+ }
+}
+
+static inline int get_symbol(CABACContext *c, uint8_t *state){
+ if(get_cabac(c, state+0))
+ return 0;
+ else{
+ int sign= get_cabac(c, state+1);
+ if(sign)
+ return -1-get_cabac_ueg(c, state+66, 32, 0, 4 , 32);
+ else
+ return 1+get_cabac_ueg(c, state+2 , 32, 0, 4 , 32);
+ }
+}
+#else
+/**
+ * put
+ */
+static inline void put_symbol(CABACContext *c, uint8_t *state, int v, int is_signed){
+ int i;
+#if 0
+ const int a= ABS(v);
+ const int e= av_log2(a+1);
+
+ put_cabac_u(c, state+0, e, 7, 6, 1); //0..6
+ if(e){
+ put_cabac(c, state+6 + e, v < 0); //7..13
+
+ for(i=; i<e; i++){
+
+ }
+ }
+#else
+// 0 1 2 3 4 5 6
+// 0 1 2 3 4 5 6
+// 0 0 1 3 6 10 15 21
+ if(v){
+ const int a= ABS(v);
+ const int e= av_log2(a);
+
+ put_cabac(c, state+0, 0);
+ put_cabac_u(c, state+1, e, 7, 6, 1); //1..7
+ if(e<7){
+ for(i=e-1; i>=0; i--){
+ static const int offset[7]= {14+0, 14+0, 14+1, 14+3, 14+6, 14+10, 14+15};
+// put_cabac(c, state+14+e-i, (a>>i)&1); //14..20
+ put_cabac(c, state+offset[e]+i, (a>>i)&1); //14..34
+ }
+
+ if(is_signed)
+ put_cabac(c, state+8 + e, v < 0); //8..14
+ }
+ }else{
+ put_cabac(c, state+0, 1);
+ }
+#endif
+}
+
+static inline int get_symbol(CABACContext *c, uint8_t *state, int is_signed){
+ int i;
+
+ if(get_cabac(c, state+0))
+ return 0;
+ else{
+ const int e= get_cabac_u(c, state+1, 7, 6, 1); //1..7
+
+ if(e<7){
+ int a= 1<<e;
+
+ for(i=e-1; i>=0; i--){
+ static const int offset[7]= {14+0, 14+0, 14+1, 14+3, 14+6, 14+10, 14+15};
+ a += get_cabac(c, state+offset[e]+i)<<i; //14..34
+ }
+
+ if(is_signed && get_cabac(c, state+8 + e)) //8..14
+ return -a;
+ else
+ return a;
+ }else
+ return -128;
+ }
+}
+#endif
+
+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 pred_diff_buffer[4][w+6];
+ uint8_t *pred_diff[4]= {pred_diff_buffer[0]+3, pred_diff_buffer[1]+3, pred_diff_buffer[2]+3, pred_diff_buffer[3]+3};
+// uint8_t temp_buf[3*w], *temp= temp_buf + 3*w;
+
+ memset(pred_diff_buffer, 0, sizeof(pred_diff_buffer));
+
+ for(y=0; y<h; y++){
+ uint8_t *temp= pred_diff[0]; //FIXME try a normal buffer
+
+ pred_diff[0]= pred_diff[1];
+ pred_diff[1]= pred_diff[2];
+ pred_diff[2]= pred_diff[3];
+ pred_diff[3]= temp;
+
+ for(x=0; x<w; x++){
+ uint8_t *temp_src= src + x + stride*y;
+ int diff, context, qdiff;
+
+ if(p->context_count == 256)
+ context= pred_diff[3+0][x-1] + 16*pred_diff[3-1][x+0];
+ else
+ context= pred_diff[3+0][x-1] + 16*pred_diff[3-1][x+0]
+ + 16*16*to8[pred_diff[3-1][x+1]] + 16*16*8*to8[pred_diff[3-0][x-2]] + 16*16*8*8*to8[pred_diff[3-2][x+0]];
+
+ diff = (int8_t)(temp_src[0] - predict(s, temp_src, stride, x, y));
+
+ qdiff= p->quant_table[128+diff];
+
+ put_symbol(c, p->state[context], diff, 1);
+
+ pred_diff[3][x]= qdiff;
+ }
+ }
+}
+
+static void write_quant_table(CABACContext *c, uint8_t *quant_table){
+ int last=0;
+ int i;
+ uint8_t state[64]={0};
+
+ for(i=1; i<256 ; 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[64]={0};
+ int i;
+ CABACContext * const c= &f->c;
+
+ put_symbol(c, state, f->version, 0);
+ put_symbol(c, state, 0, 0); //YUV cs type
+ put_cabac(c, state, 1); //chroma planes
+ put_symbol(c, state, f->chroma_h_shift, 0);
+ put_symbol(c, state, f->chroma_v_shift, 0);
+ put_cabac(c, state, 0); //no transparency plane
+
+ for(i=0; i<3; i++){ //FIXME chroma & trasparency decission
+ PlaneContext * const p= &f->plane[i];
+
+ put_symbol(c, state, av_log2(p->context_count), 0);
+ write_quant_table(c, p->quant_table);
+ }
+}
+
+static int common_init(AVCodecContext *avctx){
+ FFV1Context *s = avctx->priv_data;
+ int i, j, 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);
+
+ for(i=0; i<s->plane_count; i++){
+ PlaneContext *p= &s->plane[i];
+ }
+
+ return 0;
+}
+
+static int encode_init(AVCodecContext *avctx)
+{
+ FFV1Context *s = avctx->priv_data;
+ int i;
+
+ common_init(avctx);
+
+ s->version=0;
+
+ s->plane_count=3;
+
+ for(i=0; i<s->plane_count; i++){
+ PlaneContext * const p= &s->plane[i];
+ memcpy(p->quant_table, default_quant_table, sizeof(uint8_t)*256);
+ p->qdiff_count= DEFAULT_QDIFF_COUNT;
+
+#if 1
+ p->context_count= 256;
+ p->state= av_malloc(64*p->context_count*sizeof(uint8_t));
+#else
+ p->context_count= 16*16*8*8*8; //256*16;
+ p->state= av_malloc(64*p->context_count*sizeof(uint8_t));
+#endif
+ }
+
+ 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;
+
+ 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;
+
+ memset(p->state, 0, p->context_count*sizeof(uint8_t)*64);
+ }
+}
+
+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;
+
+ 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(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], 2);
+ }
+ emms_c();
+
+ f->picture_number++;
+
+ return put_cabac_terminate(c, 1);
+}
+
+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 pred_diff_buffer[4][w+6];
+ uint8_t *pred_diff[4]= {pred_diff_buffer[0]+3, pred_diff_buffer[1]+3, pred_diff_buffer[2]+3, pred_diff_buffer[3]+3};
+// uint8_t temp_buf[3*w], *temp= temp_buf + 3*w;
+
+ memset(pred_diff_buffer, 0, sizeof(pred_diff_buffer));
+
+ for(y=0; y<h; y++){
+ uint8_t *temp= pred_diff[0]; //FIXME try a normal buffer
+
+ pred_diff[0]= pred_diff[1];
+ pred_diff[1]= pred_diff[2];
+ pred_diff[2]= pred_diff[3];
+ pred_diff[3]= temp;
+
+ for(x=0; x<w; x++){
+ uint8_t *temp_src= src + x + stride*y;
+ int diff, context, qdiff;
+
+ if(p->context_count == 256)
+ context= pred_diff[3+0][x-1] + 16*pred_diff[3-1][x+0];
+ else
+ context= pred_diff[3+0][x-1] + 16*pred_diff[3-1][x+0]
+ + 16*16*to8[pred_diff[3-1][x+1]] + 16*16*8*to8[pred_diff[3-0][x-2]] + 16*16*8*8*to8[pred_diff[3-2][x+0]];
+
+ diff= get_symbol(c, p->state[context], 1);
+
+ temp_src[0] = predict(s, temp_src, stride, x, y) + diff;
+
+ assert(diff>= -128 && diff <= 127);
+
+ qdiff= p->quant_table[128+diff];
+
+ pred_diff[3][x]= qdiff;
+ }
+ }
+}
+
+static int read_quant_table(CABACContext *c, uint8_t *quant_table){
+ int v;
+ int i=0;
+ uint8_t state[64]={0};
+
+ for(v=0; i<256 ; v++){
+ int len= get_symbol(c, state, 0) + 1;
+
+ if(len + i > 256) return -1;
+
+ while(len--){
+ quant_table[i++] = v;
+//printf("%2d ",v);
+//if(i%16==0) printf("\n");
+ }
+ }
+
+ return v;
+}
+
+static int read_header(FFV1Context *f){
+ uint8_t state[64]={0};
+ int i;
+ CABACContext * const c= &f->c;
+
+ f->version= get_symbol(c, state, 0);
+ get_symbol(c, state, 0); //YUV cs type
+ get_cabac(c, state); //no chroma = false
+ f->chroma_h_shift= get_symbol(c, state, 0);
+ f->chroma_v_shift= get_symbol(c, state, 0);
+ get_cabac(c, state); //transparency plane
+ f->plane_count= 3;
+
+ for(i=0; i<f->plane_count; i++){
+ PlaneContext * const p= &f->plane[i];
+
+ p->context_count= 1<<get_symbol(c, state, 0);
+ p->qdiff_count= read_quant_table(c, p->quant_table);
+ if(p->qdiff_count < 0) return -1;
+
+ if(!p->state)
+ p->state= av_malloc(64*p->context_count*sizeof(uint8_t));
+ }
+
+ 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->reference= 0;
+ if(avctx->get_buffer(avctx, p) < 0){
+ fprintf(stderr, "get_buffer() failed\n");
+ return -1;
+ }
+
+ 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;
+ }
+ if(avctx->debug&FF_DEBUG_PICT_INFO)
+ printf("keyframe:%d\n", p->key_frame);
+
+
+ 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], 2);
+ }
+
+ emms_c();
+
+ f->picture_number++;
+
+ *picture= *p;
+
+ avctx->release_buffer(avctx, p); //FIXME
+
+ *data_size = sizeof(AVFrame);
+
+ bytes_read= get_cabac_terminate(c);
+ if(bytes_read ==0) printf("error at end of frame\n");
+
+ 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*/ 0,
+ NULL
+};
+
+AVCodec ffv1_encoder = {
+ "ffv1",
+ CODEC_TYPE_VIDEO,
+ CODEC_ID_FFV1,
+ sizeof(FFV1Context),
+ encode_init,
+ encode_frame,
+ encode_end,
+};
projects / platform / upstream / libav.git / commitdiff