#include <string.h>
#include "libavutil/imgutils.h"
+#include "libavutil/mem_internal.h"
#include "avcodec.h"
#include "get_bits.h"
#include "vp3dsp.h"
#include "xiph.h"
+#define VP3_MV_VLC_BITS 6
+#define VP4_MV_VLC_BITS 6
+#define SUPERBLOCK_VLC_BITS 6
+
#define FRAGMENT_PIXELS 8
// FIXME split things out into their own arrays
bit ^= 1;
current_run = get_vlc2(gb, s->superblock_run_length_vlc.table,
- 6, 2) + 1;
+ SUPERBLOCK_VLC_BITS, 2);
if (current_run == 34)
current_run += get_bits(gb, 12);
bit ^= 1;
current_run = get_vlc2(gb, s->superblock_run_length_vlc.table,
- 6, 2) + 1;
+ SUPERBLOCK_VLC_BITS, 2);
if (current_run == 34)
current_run += get_bits(gb, 12);
static int vp4_get_block_pattern(Vp3DecodeContext *s, GetBitContext *gb, int *next_block_pattern_table)
{
int v = get_vlc2(gb, s->block_pattern_vlc[*next_block_pattern_table].table, 3, 2);
- if (v == -1) {
- av_log(s->avctx, AV_LOG_ERROR, "Invalid block pattern\n");
- *next_block_pattern_table = 0;
- return 0;
- }
*next_block_pattern_table = vp4_block_pattern_table_selector[v];
return v + 1;
}
static int vp4_get_mv(Vp3DecodeContext *s, GetBitContext *gb, int axis, int last_motion)
{
- int v = get_vlc2(gb, s->vp4_mv_vlc[axis][vp4_mv_table_selector[FFABS(last_motion)]].table, 6, 2) - 31;
+ int v = get_vlc2(gb, s->vp4_mv_vlc[axis][vp4_mv_table_selector[FFABS(last_motion)]].table,
+ VP4_MV_VLC_BITS, 2);
return last_motion < 0 ? -v : v;
}
case MODE_INTER_PLUS_MV:
/* all 6 fragments use the same motion vector */
if (coding_mode == 0) {
- motion_x[0] = motion_vector_table[get_vlc2(gb, s->motion_vector_vlc.table, 6, 2)];
- motion_y[0] = motion_vector_table[get_vlc2(gb, s->motion_vector_vlc.table, 6, 2)];
+ motion_x[0] = get_vlc2(gb, s->motion_vector_vlc.table,
+ VP3_MV_VLC_BITS, 2);
+ motion_y[0] = get_vlc2(gb, s->motion_vector_vlc.table,
+ VP3_MV_VLC_BITS, 2);
} else if (coding_mode == 1) {
motion_x[0] = fixed_motion_vector_table[get_bits(gb, 6)];
motion_y[0] = fixed_motion_vector_table[get_bits(gb, 6)];
current_fragment = BLOCK_Y * s->fragment_width[0] + BLOCK_X;
if (s->all_fragments[current_fragment].coding_method != MODE_COPY) {
if (coding_mode == 0) {
- motion_x[k] = motion_vector_table[get_vlc2(gb, s->motion_vector_vlc.table, 6, 2)];
- motion_y[k] = motion_vector_table[get_vlc2(gb, s->motion_vector_vlc.table, 6, 2)];
+ motion_x[k] = get_vlc2(gb, s->motion_vector_vlc.table,
+ VP3_MV_VLC_BITS, 2);
+ motion_y[k] = get_vlc2(gb, s->motion_vector_vlc.table,
+ VP3_MV_VLC_BITS, 2);
} else if (coding_mode == 1) {
motion_x[k] = fixed_motion_vector_table[get_bits(gb, 6)];
motion_y[k] = fixed_motion_vector_table[get_bits(gb, 6)];
else
bit ^= 1;
- run_length = get_vlc2(gb, s->superblock_run_length_vlc.table, 6, 2) + 1;
+ run_length = get_vlc2(gb, s->superblock_run_length_vlc.table,
+ SUPERBLOCK_VLC_BITS, 2);
if (run_length == 34)
run_length += get_bits(gb, 12);
blocks_decoded += run_length;
return 0;
}
-static av_cold int theora_init_huffman_tables(VLC *vlc, const HuffTable *huff)
-{
- uint32_t code = 0, codes[32];
-
- for (unsigned i = 0; i < huff->nb_entries; i++) {
- codes[i] = code >> (31 - huff->entries[i].len);
- code += 0x80000000U >> huff->entries[i].len;
- }
- return ff_init_vlc_sparse(vlc, 11, huff->nb_entries,
- &huff->entries[0].len, sizeof(huff->entries[0]), 1,
- codes, 4, 4,
- &huff->entries[0].sym, sizeof(huff->entries[0]), 1, 0);
-}
-
static av_cold int vp3_decode_init(AVCodecContext *avctx)
{
Vp3DecodeContext *s = avctx->priv_data;
/* init VLC tables */
if (s->version < 2) {
for (i = 0; i < FF_ARRAY_ELEMS(s->coeff_vlc); i++) {
- if ((ret = init_vlc(&s->coeff_vlc[i], 11, 32,
- &vp3_bias[i][0][1], 4, 2,
- &vp3_bias[i][0][0], 4, 2, 0)) < 0)
+ ret = ff_init_vlc_from_lengths(&s->coeff_vlc[i], 11, 32,
+ &vp3_bias[i][0][1], 2,
+ &vp3_bias[i][0][0], 2, 1,
+ 0, 0, avctx);
+ if (ret < 0)
return ret;
}
#if CONFIG_VP4_DECODER
} else { /* version >= 2 */
for (i = 0; i < FF_ARRAY_ELEMS(s->coeff_vlc); i++) {
- if ((ret = init_vlc(&s->coeff_vlc[i], 11, 32,
- &vp4_bias[i][0][1], 4, 2,
- &vp4_bias[i][0][0], 4, 2, 0)) < 0)
+ ret = ff_init_vlc_from_lengths(&s->coeff_vlc[i], 11, 32,
+ &vp4_bias[i][0][1], 2,
+ &vp4_bias[i][0][0], 2, 1,
+ 0, 0, avctx);
+ if (ret < 0)
return ret;
}
#endif
}
} else {
for (i = 0; i < FF_ARRAY_ELEMS(s->coeff_vlc); i++) {
- ret = theora_init_huffman_tables(&s->coeff_vlc[i], &s->huffman_table[i]);
+ const HuffTable *tab = &s->huffman_table[i];
+
+ ret = ff_init_vlc_from_lengths(&s->coeff_vlc[i], 11, tab->nb_entries,
+ &tab->entries[0].len, sizeof(*tab->entries),
+ &tab->entries[0].sym, sizeof(*tab->entries), 1,
+ 0, 0, avctx);
if (ret < 0)
return ret;
}
}
- if ((ret = init_vlc(&s->superblock_run_length_vlc, 6, 34,
- &superblock_run_length_vlc_table[0][1], 4, 2,
- &superblock_run_length_vlc_table[0][0], 4, 2, 0)) < 0)
+ ret = ff_init_vlc_from_lengths(&s->superblock_run_length_vlc, SUPERBLOCK_VLC_BITS, 34,
+ superblock_run_length_vlc_lens, 1,
+ NULL, 0, 0, 1, 0, avctx);
+ if (ret < 0)
return ret;
- if ((ret = init_vlc(&s->fragment_run_length_vlc, 5, 30,
- &fragment_run_length_vlc_table[0][1], 4, 2,
- &fragment_run_length_vlc_table[0][0], 4, 2, 0)) < 0)
+ ret = ff_init_vlc_from_lengths(&s->fragment_run_length_vlc, 5, 30,
+ fragment_run_length_vlc_len, 1,
+ NULL, 0, 0, 0, 0, avctx);
+ if (ret < 0)
return ret;
- if ((ret = init_vlc(&s->mode_code_vlc, 3, 8,
- &mode_code_vlc_table[0][1], 2, 1,
- &mode_code_vlc_table[0][0], 2, 1, 0)) < 0)
+ ret = ff_init_vlc_from_lengths(&s->mode_code_vlc, 3, 8,
+ mode_code_vlc_len, 1,
+ NULL, 0, 0, 0, 0, avctx);
+ if (ret < 0)
return ret;
- if ((ret = init_vlc(&s->motion_vector_vlc, 6, 63,
- &motion_vector_vlc_table[0][1], 2, 1,
- &motion_vector_vlc_table[0][0], 2, 1, 0)) < 0)
+ ret = ff_init_vlc_from_lengths(&s->motion_vector_vlc, VP3_MV_VLC_BITS, 63,
+ &motion_vector_vlc_table[0][1], 2,
+ &motion_vector_vlc_table[0][0], 2, 1,
+ -31, 0, avctx);
+ if (ret < 0)
return ret;
#if CONFIG_VP4_DECODER
for (j = 0; j < 2; j++)
- for (i = 0; i < 7; i++)
- if ((ret = init_vlc(&s->vp4_mv_vlc[j][i], 6, 63,
- &vp4_mv_vlc[j][i][0][1], 4, 2,
- &vp4_mv_vlc[j][i][0][0], 4, 2, 0)) < 0)
+ for (i = 0; i < 7; i++) {
+ ret = ff_init_vlc_from_lengths(&s->vp4_mv_vlc[j][i], VP4_MV_VLC_BITS, 63,
+ &vp4_mv_vlc[j][i][0][1], 2,
+ &vp4_mv_vlc[j][i][0][0], 2, 1, -31,
+ 0, avctx);
+ if (ret < 0)
return ret;
+ }
/* version >= 2 */
for (i = 0; i < 2; i++)
int ret;
AVRational fps, aspect;
+ if (get_bits_left(gb) < 206)
+ return AVERROR_INVALIDDATA;
+
s->theora_header = 0;
s->theora = get_bits(gb, 24);
av_log(avctx, AV_LOG_DEBUG, "Theora bitstream version %X\n", s->theora);
return vp3_decode_init(avctx);
}
-AVCodec ff_theora_decoder = {
+const AVCodec ff_theora_decoder = {
.name = "theora",
.long_name = NULL_IF_CONFIG_SMALL("Theora"),
.type = AVMEDIA_TYPE_VIDEO,
};
#endif
-AVCodec ff_vp3_decoder = {
+const AVCodec ff_vp3_decoder = {
.name = "vp3",
.long_name = NULL_IF_CONFIG_SMALL("On2 VP3"),
.type = AVMEDIA_TYPE_VIDEO,
};
#if CONFIG_VP4_DECODER
-AVCodec ff_vp4_decoder = {
+const AVCodec ff_vp4_decoder = {
.name = "vp4",
.long_name = NULL_IF_CONFIG_SMALL("On2 VP4"),
.type = AVMEDIA_TYPE_VIDEO,
projects / ffmpeg / blobdiff