*
* 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
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
-
+
/**
* @file ffv1.c
- * FF Video Codec 1 (a experimental lossless codec)
+ * FF Video Codec 1 (an experimental lossless codec)
*/
#include "common.h"
+#include "bitstream.h"
#include "avcodec.h"
#include "dsputil.h"
-#include "cabac.h"
+#include "rangecoder.h"
#include "golomb.h"
#define MAX_PLANES 4
};
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,
+ 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 FFV1Context{
AVCodecContext *avctx;
- CABACContext c;
+ RangeCoder c;
GetBitContext gb;
PutBitContext pb;
int version;
int ac; ///< 1-> CABAC 0-> golomb rice
PlaneContext plane[MAX_PLANES];
int16_t quant_table[5][256];
-
- DSPContext dsp;
+ int run_index;
+ int colorspace;
+
+ DSPContext dsp;
}FFV1Context;
-static inline int predict(uint8_t *src, uint8_t *last){
+static 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, uint8_t *src, uint8_t *last, uint8_t *last2){
+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];
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){
+static inline void put_symbol(RangeCoder *c, uint8_t *state, int v, int is_signed){
int i;
if(v){
const int a= ABS(v);
const int e= av_log2(a);
+ put_rac(c, state+0, 0);
+
+ assert(e<=9);
- put_cabac(c, state+0, 0);
-
for(i=0; i<e; i++){
- put_cabac(c, state+1+i, 1); //1..8
+ put_rac(c, state+1+i, 1); //1..10
}
+ put_rac(c, state+1+i, 0);
- 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
+ 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_cabac(c, state+0, 1);
+ put_rac(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))
+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;
-
- 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
- }
+ int i, e, a;
+ e= 0;
+ while(get_rac(c, state+1 + e)){ //1..10
+ e++;
+ }
+ assert(e<=9);
- if(is_signed && get_cabac(c, state+9 + e)) //9..16
- return -a;
- else
- return a;
- }
+ a= 1;
+ for(i=e-1; i>=0; i--){
+ a += a + get_rac(c, state+22 + i); //22..31
}
- return -(1<<e);
+
+ if(is_signed && get_rac(c, state+11 + e)) //11..21
+ return -a;
+ else
+ return a;
}
}
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)
+ if(drift > 0)
drift= 0;
}
state->count= count;
}
-static inline void put_vlc_symbol(PutBitContext *pb, VlcState * const state, int v){
+static inline void put_vlc_symbol(PutBitContext *pb, VlcState * const state, int v, int bits){
int i, k, code;
//printf("final: %d ", v);
- v = (int8_t)(v - state->bias);
-
+ v = fold(v - state->bias, bits);
+
i= state->count;
k=0;
while(i < state->error_sum){ //FIXME optimize
#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);
+ set_sr_golomb(pb, code, k, 12, bits);
update_vlc_state(state, v);
}
-static inline int get_vlc_symbol(GetBitContext *gb, VlcState * const state){
+static inline int get_vlc_symbol(GetBitContext *gb, VlcState * const state, int bits){
int k, i, v, ret;
i= state->count;
assert(k<=8);
- v= get_ur_golomb(gb, k, 12, 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);
- 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);
-
+ ret= fold(v + state->bias, bits);
+
update_vlc_state(state, v);
//printf("final: %d\n", ret);
return ret;
}
+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*20){
+ 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;
-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;
+ context= get_context(s, sample[0]+x, sample[1]+x, sample[2]+x);
+ diff= sample[0][x] - predict(sample[0]+x, sample[1]+x);
- sample[0]= sample[1];
- sample[1]= temp;
-
- sample[1][-1]= sample[0][0 ];
- sample[0][ w]= sample[0][w-1];
+ if(context < 0){
+ context = -context;
+ diff= -diff;
+ }
- 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= fold(diff, bits);
- diff= (int8_t)diff;
+ if(s->ac){
+ put_symbol(c, p->state[context], diff, 1);
+ }else{
+ if(context == 0) run_mode=1;
- 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++;
+ 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);
}
- }
-
-// 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);
+ 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++;
+ }
}
- sample[1][x]= temp_src[0];
+// 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<<log2_run[run_index]){
- run_count -= 1<<log2_run[run_index];
- run_index++;
- put_bits(&s->pb, 1, 1);
- }
+ }
+ 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);
+ }
+ 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")}
+ }
+}
- if(run_count)
- put_bits(&s->pb, 1, 1);
+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(CABACContext *c, int16_t *quant_table){
+static void write_quant_table(RangeCoder *c, int16_t *quant_table){
int last=0;
int i;
- uint8_t state[CONTEXT_SIZE]={0};
+ 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, 7);
+ put_symbol(c, state, i-last-1, 0);
last= i;
}
}
- put_symbol(c, state, i-last-1, 0, 7);
+ put_symbol(c, state, i-last-1, 0);
}
static void write_header(FFV1Context *f){
- uint8_t state[CONTEXT_SIZE]={0};
+ uint8_t state[CONTEXT_SIZE];
int i;
- CABACContext * const c= &f->c;
+ RangeCoder * const c= &f->c;
+
+ memset(state, 128, sizeof(state));
- 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
+ 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]);
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;
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];
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{
+ }else{
p->context_count= (11*11*5*5*5+1)/2;
}
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);
+ s->colorspace= 0;
+ break;
+ case PIX_FMT_RGBA32:
+ s->colorspace= 1;
break;
default:
- fprintf(stderr, "format not supported\n");
+ 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;
}
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;
-
+ 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], 0, sizeof(uint8_t)*CONTEXT_SIZE);
- p->state[j][7] = 2*62;
+ 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);
static int encode_frame(AVCodecContext *avctx, unsigned char *buf, int buf_size, void *data){
FFV1Context *f = avctx->priv_data;
- CABACContext * const c= &f->c;
+ 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);
- 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);
+ put_rac(c, &keystate, 1);
p->key_frame= 1;
write_header(f);
clear_state(f);
}else{
- put_cabac_bypass(c, 0);
+ put_rac(c, &keystate, 0);
p->key_frame= 0;
}
if(!f->ac){
- used_count += put_cabac_terminate(c, 1);
+ used_count += ff_rac_terminate(c);
//printf("pos=%d\n", used_count);
- init_put_bits(&f->pb, buf + used_count, buf_size - used_count, NULL, NULL);
+ init_put_bits(&f->pb, buf + used_count, buf_size - used_count);
}
-
- if(1){
+
+ 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[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 put_cabac_terminate(c, 1);
+ return ff_rac_terminate(c);
}else{
flush_put_bits(&f->pb); //nicer padding FIXME
- return used_count + (get_bit_count(&f->pb)+7)/8;
+ return used_count + (put_bits_count(&f->pb)+7)/8;
}
}
-static void common_end(FFV1Context *s){
- int i;
+static 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);
}
+
+ return 0;
}
-static int encode_end(AVCodecContext *avctx)
-{
- FFV1Context *s = avctx->priv_data;
+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;
- common_end(s);
+ for(x=0; x<w; x++){
+ int diff, context, sign;
- return 0;
+ 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<<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], 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){
- 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;
-
+ int x, y;
+ int_fast16_t sample_buffer[2][w+6];
+ int_fast16_t *sample[2]= {sample_buffer[0]+3, sample_buffer[1]+3};
+
+ s->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;
+ 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++){
- 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));
- }
+ 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]= {
+ {sample_buffer[0][0]+3, sample_buffer[0][1]+3},
+ {sample_buffer[1][0]+3, sample_buffer[1][1]+3},
+ {sample_buffer[2][0]+3, sample_buffer[2][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);
- if(sign) diff= (int8_t)(-diff); //FIXME remove cast
+ b -= 0x100;
+ r -= 0x100;
+ g -= (b + r)>>2;
+ b += g;
+ r += g;
- sample[1][x]=
- temp_src[0] = predict(sample[1] + x, sample[0] + x) + diff;
-
- assert(diff>= -128 && diff <= 127);
+ src[x + stride*y]= b + (g<<8) + (r<<16);
}
}
}
-static int read_quant_table(CABACContext *c, int16_t *quant_table, int scale){
+static int read_quant_table(RangeCoder *c, int16_t *quant_table, int scale){
int v;
int i=0;
- uint8_t state[CONTEXT_SIZE]={0};
+ uint8_t state[CONTEXT_SIZE];
+
+ memset(state, 128, sizeof(state));
for(v=0; i<128 ; v++){
- int len= get_symbol(c, state, 0, 7) + 1;
+ int len= get_symbol(c, state, 0) + 1;
if(len + i > 128) return -1;
-
+
while(len--){
quant_table[i] = scale*v;
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};
+ uint8_t state[CONTEXT_SIZE];
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
+ 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;
- 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");
+ 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_RGBA32;
+ }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){
- printf("read_quant_table error\n");
+ 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];
if(!p->vlc_state) p->vlc_state= av_malloc(p->context_count*sizeof(VlcState));
}
}
-
+
return 0;
}
// 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;
+ 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;
- *data_size = 0;
+ ff_init_range_decoder(c, buf, buf_size);
+ ff_build_rac_states(c, 0.05*(1LL<<32), 256-8);
- /* 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)){
+ if(get_rac(c, &keystate)){
p->key_frame= 1;
- read_header(f);
+ 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){
- fprintf(stderr, "get_buffer() failed\n");
+ av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
return -1;
}
if(avctx->debug&FF_DEBUG_PICT_INFO)
- printf("keyframe:%d coder:%d\n", p->key_frame, f->ac);
-
+ av_log(avctx, AV_LOG_ERROR, "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");
+ 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(1){
+
+ 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= get_cabac_terminate(c);
- if(bytes_read ==0) printf("error at end of frame\n");
+ 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;
}
-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,
sizeof(FFV1Context),
decode_init,
NULL,
- decode_end,
+ common_end,
decode_frame,
CODEC_CAP_DR1 /*| CODEC_CAP_DRAW_HORIZ_BAND*/,
NULL
sizeof(FFV1Context),
encode_init,
encode_frame,
- encode_end,
+ common_end,
};
#endif