static int read_huffman_tables(HYuvContext *s, const uint8_t *src, int length)
{
GetBitContext gb;
int i, ret;
int count = 3;
if ((ret = init_get_bits(&gb, src, length * 8)) < 0)
return ret;
if (s->version > 2)
count = 1 + s->alpha + 2*s->chroma;
for (i = 0; i < count; i++) {
if ((ret = read_len_table(s->len[i], &gb, s->vlc_n)) < 0)
return ret;
if ((ret = ff_huffyuv_generate_bits_table(s->bits[i], s->len[i], s->vlc_n)) < 0)
return ret;
ff_free_vlc(&s->vlc[i]);
if ((ret = init_vlc(&s->vlc[i], VLC_BITS, s->vlc_n, s->len[i], 1, 1,
s->bits[i], 4, 4, 0)) < 0)
return ret;
}
if ((ret = generate_joint_tables(s)) < 0)
return ret;
return (get_bits_count(&gb) + 7) / 8;
}
static int read_old_huffman_tables(HYuvContext *s){
#if 1
GetBitContext gb;
int i;
init_get_bits(&gb, classic_shift_luma, classic_shift_luma_table_size*8);
if(read_len_table(s->len[0], &gb)<0)
return -1;
init_get_bits(&gb, classic_shift_chroma, classic_shift_chroma_table_size*8);
if(read_len_table(s->len[1], &gb)<0)
return -1;
for(i=0; i<256; i++) s->bits[0][i] = classic_add_luma [i];
for(i=0; i<256; i++) s->bits[1][i] = classic_add_chroma[i];
if(s->bitstream_bpp >= 24){
memcpy(s->bits[1], s->bits[0], 256*sizeof(uint32_t));
memcpy(s->len[1] , s->len [0], 256*sizeof(uint8_t));
}
memcpy(s->bits[2], s->bits[1], 256*sizeof(uint32_t));
memcpy(s->len[2] , s->len [1], 256*sizeof(uint8_t));
for(i=0; i<3; i++){
ff_free_vlc(&s->vlc[i]);
init_vlc(&s->vlc[i], VLC_BITS, 256, s->len[i], 1, 1, s->bits[i], 4, 4, 0);
}
generate_joint_tables(s);
return 0;
#else
av_log(s->avctx, AV_LOG_DEBUG, "v1 huffyuv is not supported \n");
return -1;
#endif
}
static int read_huffman_tables(HYuvContext *s, const uint8_t *src, int length)
{
GetBitContext gb;
int i;
int ret;
init_get_bits(&gb, src, length * 8);
for (i = 0; i < 3; i++) {
if (read_len_table(s->len[i], &gb) < 0)
return -1;
if (ff_huffyuv_generate_bits_table(s->bits[i], s->len[i]) < 0) {
return -1;
}
ff_free_vlc(&s->vlc[i]);
if ((ret = init_vlc(&s->vlc[i], VLC_BITS, 256, s->len[i], 1, 1,
s->bits[i], 4, 4, 0)) < 0)
return ret;
}
if ((ret = generate_joint_tables(s)) < 0)
return ret;
return (get_bits_count(&gb) + 7) / 8;
}
static int read_huffman_tables(HYuvContext *s, uint8_t *src, int length){
GetBitContext gb;
int i;
init_get_bits(&gb, src, length*8);
for(i=0; i<3; i++){
if(read_len_table(s->len[i], &gb)<0)
return -1;
if(generate_bits_table(s->bits[i], s->len[i])<0){
return -1;
}
#if 0
for(j=0; j<256; j++){
printf("%6X, %2d, %3d\n", s->bits[i][j], s->len[i][j], j);
}
#endif
free_vlc(&s->vlc[i]);
init_vlc(&s->vlc[i], VLC_BITS, 256, s->len[i], 1, 1, s->bits[i], 4, 4, 0);
}
generate_joint_tables(s);
return (get_bits_count(&gb)+7)/8;
}
static int read_old_huffman_tables(HYuvContext *s)
{
GetBitContext gb;
int i, ret;
if ((ret = init_get_bits(&gb, classic_shift_luma,
classic_shift_luma_table_size * 8)) < 0)
return ret;
if ((ret = read_len_table(s->len[0], &gb)) < 0)
return ret;
if ((ret = init_get_bits(&gb, classic_shift_chroma,
classic_shift_chroma_table_size * 8)) < 0)
return ret;
if ((ret = read_len_table(s->len[1], &gb)) < 0)
return ret;
for (i = 0; i < 256; i++)
s->bits[0][i] = classic_add_luma[i];
for (i = 0; i < 256; i++)
s->bits[1][i] = classic_add_chroma[i];
if (s->bitstream_bpp >= 24) {
memcpy(s->bits[1], s->bits[0], 256 * sizeof(uint32_t));
memcpy(s->len[1], s->len[0], 256 * sizeof(uint8_t));
}
memcpy(s->bits[2], s->bits[1], 256 * sizeof(uint32_t));
memcpy(s->len[2], s->len[1], 256 * sizeof(uint8_t));
for (i = 0; i < 3; i++) {
ff_free_vlc(&s->vlc[i]);
if ((ret = init_vlc(&s->vlc[i], VLC_BITS, 256, s->len[i], 1, 1,
s->bits[i], 4, 4, 0)) < 0)
return ret;
}
if ((ret = generate_joint_tables(s)) < 0)
return ret;
return 0;
}