UINT8 buffer[PICTURE_BUFFER_SIZE];
} MJpegDecodeContext;
+static void build_vlc(VLC *vlc, const UINT8 *bits_table, const UINT8 *val_table,
+ int nb_codes)
+{
+ UINT8 huff_size[256];
+ UINT16 huff_code[256];
+
+ memset(huff_size, 0, sizeof(huff_size));
+ build_huffman_codes(huff_size, huff_code, bits_table, val_table);
+
+ init_vlc(vlc, 9, nb_codes, huff_size, 1, 1, huff_code, 2, 2);
+}
+
static int mjpeg_decode_init(AVCodecContext *avctx)
{
MJpegDecodeContext *s = avctx->priv_data;
account FF 00 case */
s->start_code = -1;
s->buf_ptr = s->buffer;
+
+ build_vlc(&s->vlcs[0][0], bits_dc_luminance, val_dc_luminance, 12);
+ build_vlc(&s->vlcs[0][1], bits_dc_chrominance, val_dc_chrominance, 12);
+ build_vlc(&s->vlcs[1][0], bits_ac_luminance, val_ac_luminance, 251);
+ build_vlc(&s->vlcs[1][1], bits_ac_chrominance, val_ac_chrominance, 251);
return 0;
}
int len, index, i, class, n, v, code_max;
UINT8 bits_table[17];
UINT8 val_table[256];
- UINT8 huff_size[256];
- UINT16 huff_code[256];
init_get_bits(&s->gb, buf, buf_size);
}
len -= n;
- /* now build size/code table */
- memset(huff_size, 0, sizeof(huff_size));
- build_huffman_codes(huff_size, huff_code, bits_table, val_table);
-
/* build VLC and flush previous vlc if present */
free_vlc(&s->vlcs[class][index]);
dprintf("class=%d index=%d nb_codes=%d\n",
class, index, code_max + 1);
- init_vlc(&s->vlcs[class][index], 9, code_max + 1,
- huff_size, 1, 1,
- huff_code, 2, 2);
+ build_vlc(&s->vlcs[class][index], bits_table, val_table, code_max + 1);
}
return 0;
}