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Add initial_states array to ffv1.

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Originally committed as revision 25582 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer 2010-10-26 23:01:11 +00:00
parent 672e7e391a
commit 99a5e93526
1 changed files with 20 additions and 0 deletions
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20
libavcodec/ffv1.c
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@ -247,6 +247,7 @@ typedef struct FFV1Context{
int16_t quant_tables[MAX_QUANT_TABLES][MAX_CONTEXT_INPUTS][256];
int context_count[MAX_QUANT_TABLES];
uint8_t state_transition[256];
uint8_t (*initial_states[MAX_QUANT_TABLES])[32];
int run_index;
int colorspace;
int_fast16_t *sample_buffer;
@ -754,6 +755,18 @@ static av_cold int init_slice_contexts(FFV1Context *f){
return 0;
}
static int allocate_initial_states(FFV1Context *f){
int i;
for(i=0; i<f->quant_table_count; i++){
f->initial_states[i]= av_malloc(f->context_count[i]*sizeof(*f->initial_states[i]));
if(!f->initial_states[i])
return AVERROR(ENOMEM);
memset(f->initial_states[i], 128, f->context_count[i]*sizeof(*f->initial_states[i]));
}
return 0;
}
#if CONFIG_FFV1_ENCODER
static int write_extra_header(FFV1Context *f){
RangeCoder * const c= &f->c;
@ -882,6 +895,9 @@ static av_cold int encode_init(AVCodecContext *avctx)
p->context_count= s->context_count[p->quant_table_index];
}
if(allocate_initial_states(s) < 0)
return AVERROR(ENOMEM);
avctx->coded_frame= &s->picture;
switch(avctx->pix_fmt){
case PIX_FMT_YUV444P16:
@ -977,6 +993,9 @@ static void clear_state(FFV1Context *f){
p->interlace_bit_state[1]= 128;
if(fs->ac){
if(f->initial_states[p->quant_table_index]){
memcpy(p->state, f->initial_states[p->quant_table_index], CONTEXT_SIZE*p->context_count);
}else
memset(p->state, 128, CONTEXT_SIZE*p->context_count);
}else{
for(j=0; j<p->context_count; j++){
@ -1137,6 +1156,7 @@ static av_cold int common_end(AVCodecContext *avctx){
av_freep(&avctx->stats_out);
for(j=0; j<s->quant_table_count; j++){
av_freep(&s->initial_states[j]);
for(i=0; i<s->slice_count; i++){
FFV1Context *sf= s->slice_context[i];
av_freep(&sf->rc_stat2[j]);