#include "internal.h"
#include "aandcttab.h"
+#define CBP_VLC_BITS 9
+
typedef struct MV30Context {
GetBitContext gb;
}
}
-static inline void idct_1d(int *blk, int step)
+static inline void idct_1d(unsigned *blk, int step)
{
const unsigned t0 = blk[0 * step] + blk[4 * step];
const unsigned t1 = blk[0 * step] - blk[4 * step];
static inline void idct2_1d(int *blk, int step)
{
- const int t0 = blk[0 * step];
- const int t1 = blk[1 * step];
- const int t2 = (int)(t1 * 473U) >> 8;
- const int t3 = t2 - t1;
- const int t4 = ((int)(t1 * 362U) >> 8) - t3;
- const int t5 = (((int)(t1 * 277U) >> 8) - t2) + t4;
+ const unsigned int t0 = blk[0 * step];
+ const unsigned int t1 = blk[1 * step];
+ const unsigned int t2 = (int)(t1 * 473U) >> 8;
+ const unsigned int t3 = t2 - t1;
+ const unsigned int t4 = ((int)(t1 * 362U) >> 8) - t3;
+ const unsigned int t5 = (((int)(t1 * 277U) >> 8) - t2) + t4;
blk[0 * step] = t1 + t0;
blk[1 * step] = t0 + t3;
case 1:
fill = sign_extend(bytestream2_get_ne16(gbyte), 16);
pfill[0] += fill;
- block[0] = ((pfill[0] * qtab[0]) >> 5) + 128;
+ block[0] = ((int)((unsigned)pfill[0] * qtab[0]) >> 5) + 128;
s->bdsp.fill_block_tab[1](dst, block[0], linesize, 8);
break;
case 2:
memset(block, 0, sizeof(*block) * 64);
fill = sign_extend(bytestream2_get_ne16(gbyte), 16);
pfill[0] += fill;
- block[0] = pfill[0] * qtab[0];
+ block[0] = (unsigned)pfill[0] * qtab[0];
block[1] = sign_extend(bytestream2_get_ne16(gbyte), 16) * qtab[1];
block[8] = sign_extend(bytestream2_get_ne16(gbyte), 16) * qtab[8];
block[9] = sign_extend(bytestream2_get_ne16(gbyte), 16) * qtab[9];
case 3:
fill = sign_extend(bytestream2_get_ne16(gbyte), 16);
pfill[0] += fill;
- block[0] = pfill[0] * qtab[0];
+ block[0] = (unsigned)pfill[0] * qtab[0];
for (int i = 1; i < 64; i++)
block[zigzag[i]] = sign_extend(bytestream2_get_ne16(gbyte), 16) * qtab[zigzag[i]];
idct_put(dst, linesize, block);
case 1:
fill = sign_extend(bytestream2_get_ne16(gbyte), 16);
pfill[0] += fill;
- block[0] = (pfill[0] * qtab[0]) >> 5;
+ block[0] = (int)((unsigned)pfill[0] * qtab[0]) >> 5;
update_inter_block(dst, linesize, src, in_linesize, block[0]);
break;
case 2:
memset(block, 0, sizeof(*block) * 64);
fill = sign_extend(bytestream2_get_ne16(gbyte), 16);
pfill[0] += fill;
- block[0] = pfill[0] * qtab[0];
+ block[0] = (unsigned)pfill[0] * qtab[0];
block[1] = sign_extend(bytestream2_get_ne16(gbyte), 16) * qtab[1];
block[8] = sign_extend(bytestream2_get_ne16(gbyte), 16) * qtab[8];
block[9] = sign_extend(bytestream2_get_ne16(gbyte), 16) * qtab[9];
case 3:
fill = sign_extend(bytestream2_get_ne16(gbyte), 16);
pfill[0] += fill;
- block[0] = pfill[0] * qtab[0];
+ block[0] = (unsigned)pfill[0] * qtab[0];
for (int i = 1; i < 64; i++)
block[zigzag[i]] = sign_extend(bytestream2_get_ne16(gbyte), 16) * qtab[zigzag[i]];
idct_add(dst, linesize, src, in_linesize, block);
memset(coeffs, 0, nb_codes * sizeof(*coeffs));
for (int i = 0; i < nb_codes;) {
- int value = get_vlc2(gb, cbp_tab.table, cbp_tab.bits, 1);
-
- if (value < 0)
- return AVERROR_INVALIDDATA;
+ int value = get_vlc2(gb, cbp_tab.table, CBP_VLC_BITS, 1);
if (value > 0) {
int x = get_bits(gb, value);
return avpkt->size;
}
-static const uint16_t cbp_codes[] = {
- 0, 1, 4, 5, 6, 0xE, 0x1E, 0x3E, 0x7E, 0xFE, 0x1FE, 0x1FF,
-};
-
static const uint8_t cbp_bits[] = {
2, 2, 3, 3, 3, 4, 5, 6, 7, 8, 9, 9,
};
static av_cold void init_static_data(void)
{
- INIT_VLC_SPARSE_STATIC(&cbp_tab, 9, FF_ARRAY_ELEMS(cbp_bits),
- cbp_bits, 1, 1, cbp_codes, 2, 2, NULL, 0, 0, 512);
+ INIT_VLC_STATIC_FROM_LENGTHS(&cbp_tab, CBP_VLC_BITS, FF_ARRAY_ELEMS(cbp_bits),
+ cbp_bits, 1, NULL, 0, 0, 0, 0, 1 << CBP_VLC_BITS);
}
static av_cold int decode_init(AVCodecContext *avctx)
return 0;
}
-AVCodec ff_mv30_decoder = {
+const AVCodec ff_mv30_decoder = {
.name = "mv30",
.long_name = NULL_IF_CONFIG_SMALL("MidiVid 3.0"),
.type = AVMEDIA_TYPE_VIDEO,