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ffv1: remove VLAs 

Originally committed as revision 23802 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Måns Rullgård 2010-06-26 15:53:25 +00:00
parent 02591641f8
commit cbabccc367
1 changed files with 19 additions and 14 deletions
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33
libavcodec/ffv1.c
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@ -237,6 +237,7 @@ typedef struct FFV1Context{
uint8_t state_transition[256];
int run_index;
int colorspace;
int_fast16_t *sample_buffer;
DSPContext dsp;
}FFV1Context;
@ -509,14 +510,14 @@ static inline int encode_line(FFV1Context *s, int w, int_fast16_t *sample[2], in
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];
int_fast16_t *sample[3];
s->run_index=0;
memset(sample_buffer, 0, sizeof(sample_buffer));
memset(s->sample_buffer, 0, ring_size*(w+6)*sizeof(*s->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[i]= s->sample_buffer + (w+6)*((h+i-y)%ring_size) + 3;
sample[0][-1]= sample[1][0 ];
sample[1][ w]= sample[1][w-1];
@ -539,15 +540,15 @@ static void encode_plane(FFV1Context *s, uint8_t *src, int w, int h, int stride,
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];
int_fast16_t *sample[3][3];
s->run_index=0;
memset(sample_buffer, 0, sizeof(sample_buffer));
memset(s->sample_buffer, 0, ring_size*3*(w+6)*sizeof(*s->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;
sample[p][i]= s->sample_buffer + p*ring_size*(w+6) + ((h+i-y)%ring_size)*(w+6) + 3;
for(x=0; x<w; x++){
int v= src[x + stride*y];
@ -631,6 +632,10 @@ static av_cold int common_init(AVCodecContext *avctx){
assert(s->width && s->height);
s->sample_buffer = av_malloc(6 * (s->width+6) * sizeof(*s->sample_buffer));
if (!s->sample_buffer)
return AVERROR(ENOMEM);
return 0;
}
@ -823,6 +828,8 @@ static av_cold int common_end(AVCodecContext *avctx){
av_freep(&p->vlc_state);
}
av_freep(&s->sample_buffer);
return 0;
}
@ -885,14 +892,13 @@ static av_always_inline void decode_line(FFV1Context *s, int w, int_fast16_t *sa
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;
sample[0]=s->sample_buffer +3;
sample[1]=s->sample_buffer+w+6+3;
s->run_index=0;
memset(sample_buffer, 0, sizeof(sample_buffer));
memset(s->sample_buffer, 0, 2*(w+6)*sizeof(*s->sample_buffer));
for(y=0; y<h; y++){
int_fast16_t *temp= sample[0]; //FIXME try a normal buffer
@ -921,16 +927,15 @@ static void decode_plane(FFV1Context *s, uint8_t *src, int w, int h, int stride,
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;
sample[x][0] = s->sample_buffer + x*2 *(w+6) + 3;
sample[x][1] = s->sample_buffer + (x*2+1)*(w+6) + 3;
}
s->run_index=0;
memset(sample_buffer, 0, sizeof(sample_buffer));
memset(s->sample_buffer, 0, 6*(w+6)*sizeof(*s->sample_buffer));
for(y=0; y<h; y++){
for(p=0; p<3; p++){