-/**
- * @file vp5.c
- * VP5 compatible video decoder
- *
+/*
* Copyright (C) 2006 Aurelien Jacobs <aurel@gnuage.org>
*
- * This file is part of FFmpeg.
+ * This file is part of Libav.
*
- * 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
+ * VP5 compatible video decoder
+ */
+
#include <stdlib.h>
#include <string.h>
#include "avcodec.h"
#include "dsputil.h"
-#include "bitstream.h"
+#include "get_bits.h"
#include "vp56.h"
#include "vp56data.h"
VP56RangeCoder *c = &s->c;
int rows, cols;
- vp56_init_range_decoder(&s->c, buf, buf_size);
+ ff_vp56_init_range_decoder(&s->c, buf, buf_size);
s->framep[VP56_FRAME_CURRENT]->key_frame = !vp56_rac_get(c);
vp56_rac_get(c);
- vp56_init_dequant(s, vp56_rac_gets(c, 6));
+ ff_vp56_init_dequant(s, vp56_rac_gets(c, 6));
if (s->framep[VP56_FRAME_CURRENT]->key_frame)
{
vp56_rac_gets(c, 8);
vp56_rac_gets(c, 8); /* number of displayed macroblock rows */
vp56_rac_gets(c, 8); /* number of displayed macroblock cols */
vp56_rac_gets(c, 2);
- if (16*cols != s->avctx->coded_width ||
+ if (!s->macroblocks || /* first frame */
+ 16*cols != s->avctx->coded_width ||
16*rows != s->avctx->coded_height) {
avcodec_set_dimensions(s->avctx, 16*cols, 16*rows);
return 2;
}
- }
+ } else if (!s->macroblocks)
+ return 0;
return 1;
}
-/* Gives very similar result than the vp6 version except in a few cases */
-static int vp5_adjust(int v, int t)
-{
- int s2, s1 = v >> 31;
- v ^= s1;
- v -= s1;
- v *= v < 2*t;
- v -= t;
- s2 = v >> 31;
- v ^= s2;
- v -= s2;
- v = t - v;
- v += s1;
- v ^= s1;
- return v;
-}
-
static void vp5_parse_vector_adjustment(VP56Context *s, VP56mv *vect)
{
VP56RangeCoder *c = &s->c;
- Vp56Model *model = s->modelp;
+ VP56Model *model = s->modelp;
int comp, di;
for (comp=0; comp<2; comp++) {
static void vp5_parse_vector_models(VP56Context *s)
{
VP56RangeCoder *c = &s->c;
- Vp56Model *model = s->modelp;
+ VP56Model *model = s->modelp;
int comp, node;
for (comp=0; comp<2; comp++) {
model->vector_pdv[comp][node] = vp56_rac_gets_nn(c, 7);
}
-static void vp5_parse_coeff_models(VP56Context *s)
+static int vp5_parse_coeff_models(VP56Context *s)
{
VP56RangeCoder *c = &s->c;
- Vp56Model *model = s->modelp;
+ VP56Model *model = s->modelp;
uint8_t def_prob[11];
int node, cg, ctx;
int ct; /* code type */
for (ctx=0; ctx<6; ctx++)
for (node=0; node<5; node++)
model->coeff_acct[pt][ct][cg][ctx][node] = av_clip(((model->coeff_ract[pt][ct][cg][node] * vp5_ract_lc[ct][cg][node][ctx][0] + 128) >> 8) + vp5_ract_lc[ct][cg][node][ctx][1], 1, 254);
+ return 0;
}
static void vp5_parse_coeff(VP56Context *s)
{
VP56RangeCoder *c = &s->c;
- Vp56Model *model = s->modelp;
+ VP56Model *model = s->modelp;
uint8_t *permute = s->scantable.permutated;
uint8_t *model1, *model2;
int coeff, sign, coeff_idx;
model1 = model->coeff_dccv[pt];
model2 = model->coeff_dcct[pt][ctx];
- for (coeff_idx=0; coeff_idx<64; ) {
+ coeff_idx = 0;
+ for (;;) {
if (vp56_rac_get_prob(c, model2[0])) {
if (vp56_rac_get_prob(c, model2[2])) {
if (vp56_rac_get_prob(c, model2[3])) {
ct = 0;
s->coeff_ctx[vp56_b6to4[b]][coeff_idx] = 0;
}
+ coeff_idx++;
+ if (coeff_idx >= 64)
+ break;
- cg = vp5_coeff_groups[++coeff_idx];
+ cg = vp5_coeff_groups[coeff_idx];
ctx = s->coeff_ctx[vp56_b6to4[b]][coeff_idx];
model1 = model->coeff_ract[pt][ct][cg];
model2 = cg > 2 ? model1 : model->coeff_acct[pt][ct][cg][ctx];
static void vp5_default_models_init(VP56Context *s)
{
- Vp56Model *model = s->modelp;
+ VP56Model *model = s->modelp;
int i;
for (i=0; i<2; i++) {
{
VP56Context *s = avctx->priv_data;
- vp56_init(avctx, 1, 0);
+ ff_vp56_init(avctx, 1, 0);
s->vp56_coord_div = vp5_coord_div;
s->parse_vector_adjustment = vp5_parse_vector_adjustment;
- s->adjust = vp5_adjust;
s->parse_coeff = vp5_parse_coeff;
s->default_models_init = vp5_default_models_init;
s->parse_vector_models = vp5_parse_vector_models;
return 0;
}
-AVCodec vp5_decoder = {
- "vp5",
- CODEC_TYPE_VIDEO,
- CODEC_ID_VP5,
- sizeof(VP56Context),
- vp5_decode_init,
- NULL,
- vp56_free,
- vp56_decode_frame,
- CODEC_CAP_DR1,
+AVCodec ff_vp5_decoder = {
+ .name = "vp5",
+ .type = AVMEDIA_TYPE_VIDEO,
+ .id = CODEC_ID_VP5,
+ .priv_data_size = sizeof(VP56Context),
+ .init = vp5_decode_init,
+ .close = ff_vp56_free,
+ .decode = ff_vp56_decode_frame,
+ .capabilities = CODEC_CAP_DR1,
.long_name = NULL_IF_CONFIG_SMALL("On2 VP5"),
};
projects / ffmpeg / blobdiff