-/**
- * @file libavcodec/vp6.c
- * VP6 compatible video decoder
- *
+/*
* Copyright (C) 2006 Aurelien Jacobs <aurel@gnuage.org>
*
- * The VP6F decoder accepts an optional 1 byte extradata. It is composed of:
- * - upper 4bits: difference between encoded width and visible width
- * - lower 4bits: difference between encoded height and visible height
+ * This file is part of Libav.
*
- * This file is part of FFmpeg.
- *
- * FFmpeg is free software; you can redistribute it and/or
+ * Libav is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
- * FFmpeg is distributed in the hope that it will be useful,
+ * Libav is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
- * License along with FFmpeg; if not, write to the Free Software
+ * License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
+/**
+ * @file
+ * VP6 compatible video decoder
+ *
+ * The VP6F decoder accepts an optional 1 byte extradata. It is composed of:
+ * - upper 4 bits: difference between encoded width and visible width
+ * - lower 4 bits: difference between encoded height and visible height
+ */
+
#include <stdlib.h>
#include "avcodec.h"
-#include "dsputil.h"
#include "get_bits.h"
#include "huffman.h"
#include "vp56data.h"
#include "vp6data.h"
+#define VP6_MAX_HUFF_SIZE 12
static void vp6_parse_coeff(VP56Context *s);
static void vp6_parse_coeff_huffman(VP56Context *s);
int vrt_shift = 0;
int sub_version;
int rows, cols;
- int res = 1;
+ int res = 0;
int separated_coeff = buf[0] & 1;
s->framep[VP56_FRAME_CURRENT]->key_frame = !(buf[0] & 0x80);
- vp56_init_dequant(s, (buf[0] >> 1) & 0x3F);
+ ff_vp56_init_dequant(s, (buf[0] >> 1) & 0x3F);
if (s->framep[VP56_FRAME_CURRENT]->key_frame) {
sub_version = buf[1] >> 3;
if (sub_version > 8)
- return 0;
+ return AVERROR_INVALIDDATA;
s->filter_header = buf[1] & 0x06;
if (buf[1] & 1) {
- av_log(s->avctx, AV_LOG_ERROR, "interlacing not supported\n");
- return 0;
+ av_log_missing_feature(s->avctx, "Interlacing", 0);
+ return AVERROR_PATCHWELCOME;
}
if (separated_coeff || !s->filter_header) {
coeff_offset = AV_RB16(buf+2) - 2;
cols = buf[3]; /* number of stored macroblock cols */
/* buf[4] is number of displayed macroblock rows */
/* buf[5] is number of displayed macroblock cols */
+ if (!rows || !cols) {
+ av_log(s->avctx, AV_LOG_ERROR, "Invalid size %dx%d\n", cols << 4, rows << 4);
+ return AVERROR_INVALIDDATA;
+ }
if (!s->macroblocks || /* first frame */
16*cols != s->avctx->coded_width ||
s->avctx->width -= s->avctx->extradata[0] >> 4;
s->avctx->height -= s->avctx->extradata[0] & 0x0F;
}
- res = 2;
+ res = VP56_SIZE_CHANGE;
}
- vp56_init_range_decoder(c, buf+6, buf_size-6);
+ ff_vp56_init_range_decoder(c, buf+6, buf_size-6);
vp56_rac_gets(c, 2);
parse_filter_info = s->filter_header;
vrt_shift = 5;
s->sub_version = sub_version;
} else {
- if (!s->sub_version)
- return 0;
+ if (!s->sub_version || !s->avctx->coded_width || !s->avctx->coded_height)
+ return AVERROR_INVALIDDATA;
if (separated_coeff || !s->filter_header) {
coeff_offset = AV_RB16(buf+1) - 2;
buf += 2;
buf_size -= 2;
}
- vp56_init_range_decoder(c, buf+1, buf_size-1);
+ ff_vp56_init_range_decoder(c, buf+1, buf_size-1);
*golden_frame = vp56_rac_get(c);
if (s->filter_header) {
if (coeff_offset) {
buf += coeff_offset;
buf_size -= coeff_offset;
- if (buf_size < 0)
- return 0;
+ if (buf_size < 0) {
+ if (s->framep[VP56_FRAME_CURRENT]->key_frame)
+ avcodec_set_dimensions(s->avctx, 0, 0);
+ return AVERROR_INVALIDDATA;
+ }
if (s->use_huffman) {
s->parse_coeff = vp6_parse_coeff_huffman;
init_get_bits(&s->gb, buf, buf_size<<3);
} else {
- vp56_init_range_decoder(&s->cc, buf, buf_size);
+ ff_vp56_init_range_decoder(&s->cc, buf, buf_size);
s->ccp = &s->cc;
}
} else {
model->vector_sig[0] = 0x80;
model->vector_sig[1] = 0x80;
- memcpy(model->mb_types_stats, vp56_def_mb_types_stats, sizeof(model->mb_types_stats));
+ memcpy(model->mb_types_stats, ff_vp56_def_mb_types_stats, sizeof(model->mb_types_stats));
memcpy(model->vector_fdv, vp6_def_fdv_vector_model, sizeof(model->vector_fdv));
memcpy(model->vector_pdv, vp6_def_pdv_vector_model, sizeof(model->vector_pdv));
memcpy(model->coeff_runv, vp6_def_runv_coeff_model, sizeof(model->coeff_runv));
return (a->count - b->count)*16 + (b->sym - a->sym);
}
-static void vp6_build_huff_tree(VP56Context *s, uint8_t coeff_model[],
- const uint8_t *map, unsigned size, VLC *vlc)
+static int vp6_build_huff_tree(VP56Context *s, uint8_t coeff_model[],
+ const uint8_t *map, unsigned size, VLC *vlc)
{
- Node nodes[2*size], *tmp = &nodes[size];
+ Node nodes[2*VP6_MAX_HUFF_SIZE], *tmp = &nodes[size];
int a, b, i;
/* first compute probabilities from model */
nodes[map[2*i+1]].count = b + !b;
}
- /* then build the huffman tree accodring to probabilities */
- ff_huff_build_tree(s->avctx, vlc, size, nodes, vp6_huff_cmp,
- FF_HUFFMAN_FLAG_HNODE_FIRST);
+ ff_free_vlc(vlc);
+ /* then build the huffman tree according to probabilities */
+ return ff_huff_build_tree(s->avctx, vlc, size, nodes, vp6_huff_cmp,
+ FF_HUFFMAN_FLAG_HNODE_FIRST);
}
-static void vp6_parse_coeff_models(VP56Context *s)
+static int vp6_parse_coeff_models(VP56Context *s)
{
VP56RangeCoder *c = &s->c;
VP56Model *model = s->modelp;
if (s->use_huffman) {
for (pt=0; pt<2; pt++) {
- vp6_build_huff_tree(s, model->coeff_dccv[pt],
- vp6_huff_coeff_map, 12, &s->dccv_vlc[pt]);
- vp6_build_huff_tree(s, model->coeff_runv[pt],
- vp6_huff_run_map, 9, &s->runv_vlc[pt]);
+ if (vp6_build_huff_tree(s, model->coeff_dccv[pt],
+ vp6_huff_coeff_map, 12, &s->dccv_vlc[pt]))
+ return -1;
+ if (vp6_build_huff_tree(s, model->coeff_runv[pt],
+ vp6_huff_run_map, 9, &s->runv_vlc[pt]))
+ return -1;
for (ct=0; ct<3; ct++)
for (cg = 0; cg < 6; cg++)
- vp6_build_huff_tree(s, model->coeff_ract[pt][ct][cg],
- vp6_huff_coeff_map, 12,
- &s->ract_vlc[pt][ct][cg]);
+ if (vp6_build_huff_tree(s, model->coeff_ract[pt][ct][cg],
+ vp6_huff_coeff_map, 12,
+ &s->ract_vlc[pt][ct][cg]))
+ return -1;
}
memset(s->nb_null, 0, sizeof(s->nb_null));
} else {
for (node=0; node<5; node++)
model->coeff_dcct[pt][ctx][node] = av_clip(((model->coeff_dccv[pt][node] * vp6_dccv_lc[ctx][node][0] + 128) >> 8) + vp6_dccv_lc[ctx][node][1], 1, 255);
}
+ return 0;
}
static void vp6_parse_vector_adjustment(VP56Context *s, VP56mv *vect)
else
delta |= 8;
} else {
- delta = vp56_rac_get_tree(c, vp56_pva_tree,
+ delta = vp56_rac_get_tree(c, ff_vp56_pva_tree,
model->vector_pdv[comp]);
}
if (b > 3) pt = 1;
vlc_coeff = &s->dccv_vlc[pt];
- for (coeff_idx=0; coeff_idx<64; ) {
+ for (coeff_idx = 0;;) {
int run = 1;
if (coeff_idx<2 && s->nb_null[coeff_idx][pt]) {
s->nb_null[coeff_idx][pt]--;
if (coeff_idx)
break;
} else {
- if (get_bits_count(&s->gb) >= s->gb.size_in_bits)
+ if (get_bits_left(&s->gb) <= 0)
return;
coeff = get_vlc2(&s->gb, vlc_coeff->table, 9, 3);
if (coeff == 0) {
s->nb_null[1][pt] = vp6_get_nb_null(s);
break;
} else {
- int coeff2 = vp56_coeff_bias[coeff];
+ int coeff2 = ff_vp56_coeff_bias[coeff];
if (coeff > 4)
coeff2 += get_bits(&s->gb, coeff <= 9 ? coeff - 4 : 11);
ct = 1 + (coeff2 > 1);
}
}
coeff_idx+=run;
+ if (coeff_idx >= 64)
+ break;
cg = FFMIN(vp6_coeff_groups[coeff_idx], 3);
vlc_coeff = &s->ract_vlc[pt][ct][cg];
}
if (b > 3) pt = 1;
- ctx = s->left_block[vp56_b6to4[b]].not_null_dc
+ ctx = s->left_block[ff_vp56_b6to4[b]].not_null_dc
+ s->above_blocks[s->above_block_idx[b]].not_null_dc;
model1 = model->coeff_dccv[pt];
model2 = model->coeff_dcct[pt][ctx];
- for (coeff_idx=0; coeff_idx<64; ) {
+ coeff_idx = 0;
+ for (;;) {
if ((coeff_idx>1 && ct==0) || vp56_rac_get_prob(c, model2[0])) {
/* parse a coeff */
if (vp56_rac_get_prob(c, model2[2])) {
if (vp56_rac_get_prob(c, model2[3])) {
- idx = vp56_rac_get_tree(c, vp56_pc_tree, model1);
- coeff = vp56_coeff_bias[idx+5];
- for (i=vp56_coeff_bit_length[idx]; i>=0; i--)
- coeff += vp56_rac_get_prob(c, vp56_coeff_parse_table[idx][i]) << i;
+ idx = vp56_rac_get_tree(c, ff_vp56_pc_tree, model1);
+ coeff = ff_vp56_coeff_bias[idx+5];
+ for (i=ff_vp56_coeff_bit_length[idx]; i>=0; i--)
+ coeff += vp56_rac_get_prob(c, ff_vp56_coeff_parse_table[idx][i]) << i;
} else {
if (vp56_rac_get_prob(c, model2[4]))
coeff = 3 + vp56_rac_get_prob(c, model1[5]);
run += vp56_rac_get_prob(c, model3[i+8]) << i;
}
}
-
- cg = vp6_coeff_groups[coeff_idx+=run];
+ coeff_idx += run;
+ if (coeff_idx >= 64)
+ break;
+ cg = vp6_coeff_groups[coeff_idx];
model1 = model2 = model->coeff_ract[pt][ct][cg];
}
- s->left_block[vp56_b6to4[b]].not_null_dc =
+ s->left_block[ff_vp56_b6to4[b]].not_null_dc =
s->above_blocks[s->above_block_idx[b]].not_null_dc = !!s->block_coeff[b][0];
}
}
-static int vp6_adjust(int v, int t)
-{
- int V = v, s = v >> 31;
- V ^= s;
- V -= s;
- if (V-t-1 >= (unsigned)(t-1))
- return v;
- V = 2*t - V;
- V += s;
- V ^= s;
- return V;
-}
-
static int vp6_block_variance(uint8_t *src, int stride)
{
int sum = 0, square_sum = 0;
int stride, int h_weight, int v_weight)
{
uint8_t *tmp = s->edge_emu_buffer+16;
- s->dsp.put_h264_chroma_pixels_tab[0](tmp, src, stride, 9, h_weight, 0);
- s->dsp.put_h264_chroma_pixels_tab[0](dst, tmp, stride, 8, 0, v_weight);
+ s->h264chroma.put_h264_chroma_pixels_tab[0](tmp, src, stride, 9, h_weight, 0);
+ s->h264chroma.put_h264_chroma_pixels_tab[0](dst, tmp, stride, 8, 0, v_weight);
}
static void vp6_filter(VP56Context *s, uint8_t *dst, uint8_t *src,
vp6_filter_hv4(dst, src+offset1, stride, stride,
vp6_block_copy_filter[select][y8]);
} else {
- s->dsp.vp6_filter_diag4(dst, src+offset1+((mv.x^mv.y)>>31), stride,
+ s->vp56dsp.vp6_filter_diag4(dst, src+offset1+((mv.x^mv.y)>>31), stride,
vp6_block_copy_filter[select][x8],
vp6_block_copy_filter[select][y8]);
}
} else {
if (!x8 || !y8) {
- s->dsp.put_h264_chroma_pixels_tab[0](dst, src+offset1, stride, 8, x8, y8);
+ s->h264chroma.put_h264_chroma_pixels_tab[0](dst, src + offset1, stride, 8, x8, y8);
} else {
vp6_filter_diag2(s, dst, src+offset1 + ((mv.x^mv.y)>>31), stride, x8, y8);
}
{
VP56Context *s = avctx->priv_data;
- vp56_init(avctx, avctx->codec->id == CODEC_ID_VP6,
- avctx->codec->id == CODEC_ID_VP6A);
+ ff_vp56_init(avctx, avctx->codec->id == AV_CODEC_ID_VP6,
+ avctx->codec->id == AV_CODEC_ID_VP6A);
s->vp56_coord_div = vp6_coord_div;
s->parse_vector_adjustment = vp6_parse_vector_adjustment;
- s->adjust = vp6_adjust;
s->filter = vp6_filter;
s->default_models_init = vp6_default_models_init;
s->parse_vector_models = vp6_parse_vector_models;
return 0;
}
-AVCodec vp6_decoder = {
- "vp6",
- CODEC_TYPE_VIDEO,
- CODEC_ID_VP6,
- sizeof(VP56Context),
- vp6_decode_init,
- NULL,
- vp56_free,
- vp56_decode_frame,
- CODEC_CAP_DR1,
- .long_name = NULL_IF_CONFIG_SMALL("On2 VP6"),
+static av_cold int vp6_decode_free(AVCodecContext *avctx)
+{
+ VP56Context *s = avctx->priv_data;
+ int pt, ct, cg;
+
+ ff_vp56_free(avctx);
+
+ for (pt=0; pt<2; pt++) {
+ ff_free_vlc(&s->dccv_vlc[pt]);
+ ff_free_vlc(&s->runv_vlc[pt]);
+ for (ct=0; ct<3; ct++)
+ for (cg=0; cg<6; cg++)
+ ff_free_vlc(&s->ract_vlc[pt][ct][cg]);
+ }
+ return 0;
+}
+
+AVCodec ff_vp6_decoder = {
+ .name = "vp6",
+ .type = AVMEDIA_TYPE_VIDEO,
+ .id = AV_CODEC_ID_VP6,
+ .priv_data_size = sizeof(VP56Context),
+ .init = vp6_decode_init,
+ .close = vp6_decode_free,
+ .decode = ff_vp56_decode_frame,
+ .capabilities = CODEC_CAP_DR1,
+ .long_name = NULL_IF_CONFIG_SMALL("On2 VP6"),
};
/* flash version, not flipped upside-down */
-AVCodec vp6f_decoder = {
- "vp6f",
- CODEC_TYPE_VIDEO,
- CODEC_ID_VP6F,
- sizeof(VP56Context),
- vp6_decode_init,
- NULL,
- vp56_free,
- vp56_decode_frame,
- CODEC_CAP_DR1,
- .long_name = NULL_IF_CONFIG_SMALL("On2 VP6 (Flash version)"),
+AVCodec ff_vp6f_decoder = {
+ .name = "vp6f",
+ .type = AVMEDIA_TYPE_VIDEO,
+ .id = AV_CODEC_ID_VP6F,
+ .priv_data_size = sizeof(VP56Context),
+ .init = vp6_decode_init,
+ .close = vp6_decode_free,
+ .decode = ff_vp56_decode_frame,
+ .capabilities = CODEC_CAP_DR1,
+ .long_name = NULL_IF_CONFIG_SMALL("On2 VP6 (Flash version)"),
};
/* flash version, not flipped upside-down, with alpha channel */
-AVCodec vp6a_decoder = {
- "vp6a",
- CODEC_TYPE_VIDEO,
- CODEC_ID_VP6A,
- sizeof(VP56Context),
- vp6_decode_init,
- NULL,
- vp56_free,
- vp56_decode_frame,
- CODEC_CAP_DR1,
- .long_name = NULL_IF_CONFIG_SMALL("On2 VP6 (Flash version, with alpha channel)"),
+AVCodec ff_vp6a_decoder = {
+ .name = "vp6a",
+ .type = AVMEDIA_TYPE_VIDEO,
+ .id = AV_CODEC_ID_VP6A,
+ .priv_data_size = sizeof(VP56Context),
+ .init = vp6_decode_init,
+ .close = vp6_decode_free,
+ .decode = ff_vp56_decode_frame,
+ .capabilities = CODEC_CAP_DR1,
+ .long_name = NULL_IF_CONFIG_SMALL("On2 VP6 (Flash version, with alpha channel)"),
};
projects / ffmpeg / blobdiff