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vp5.c
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1 /*
2  * Copyright (C) 2006 Aurelien Jacobs <aurel@gnuage.org>
3  *
4  * This file is part of FFmpeg.
5  *
6  * FFmpeg is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU Lesser General Public
8  * License as published by the Free Software Foundation; either
9  * version 2.1 of the License, or (at your option) any later version.
10  *
11  * FFmpeg is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14  * Lesser General Public License for more details.
15  *
16  * You should have received a copy of the GNU Lesser General Public
17  * License along with FFmpeg; if not, write to the Free Software
18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19  */
20 
21 /**
22  * @file
23  * VP5 compatible video decoder
24  */
25 
26 #include <stdlib.h>
27 #include <string.h>
28 
29 #include "avcodec.h"
30 #include "internal.h"
31 
32 #include "vp56.h"
33 #include "vp56data.h"
34 #include "vp5data.h"
35 
36 
37 static int vp5_parse_header(VP56Context *s, const uint8_t *buf, int buf_size)
38 {
39  VP56RangeCoder *c = &s->c;
40  int rows, cols;
41  int ret;
42 
43  ret = ff_vp56_init_range_decoder(&s->c, buf, buf_size);
44  if (ret < 0)
45  return ret;
46  s->frames[VP56_FRAME_CURRENT]->key_frame = !vp56_rac_get(c);
47  vp56_rac_get(c);
49  if (s->frames[VP56_FRAME_CURRENT]->key_frame)
50  {
51  vp56_rac_gets(c, 8);
52  if(vp56_rac_gets(c, 5) > 5)
53  return AVERROR_INVALIDDATA;
54  vp56_rac_gets(c, 2);
55  if (vp56_rac_get(c)) {
56  avpriv_report_missing_feature(s->avctx, "Interlacing");
57  return AVERROR_PATCHWELCOME;
58  }
59  rows = vp56_rac_gets(c, 8); /* number of stored macroblock rows */
60  cols = vp56_rac_gets(c, 8); /* number of stored macroblock cols */
61  if (!rows || !cols) {
62  av_log(s->avctx, AV_LOG_ERROR, "Invalid size %dx%d\n",
63  cols << 4, rows << 4);
64  return AVERROR_INVALIDDATA;
65  }
66  vp56_rac_gets(c, 8); /* number of displayed macroblock rows */
67  vp56_rac_gets(c, 8); /* number of displayed macroblock cols */
68  vp56_rac_gets(c, 2);
69  if (!s->macroblocks || /* first frame */
70  16*cols != s->avctx->coded_width ||
71  16*rows != s->avctx->coded_height) {
72  int ret = ff_set_dimensions(s->avctx, 16 * cols, 16 * rows);
73  if (ret < 0)
74  return ret;
75  return VP56_SIZE_CHANGE;
76  }
77  } else if (!s->macroblocks)
78  return AVERROR_INVALIDDATA;
79  return 0;
80 }
81 
82 static void vp5_parse_vector_adjustment(VP56Context *s, VP56mv *vect)
83 {
84  VP56RangeCoder *c = &s->c;
85  VP56Model *model = s->modelp;
86  int comp, di;
87 
88  for (comp=0; comp<2; comp++) {
89  int delta = 0;
90  if (vp56_rac_get_prob_branchy(c, model->vector_dct[comp])) {
91  int sign = vp56_rac_get_prob(c, model->vector_sig[comp]);
92  di = vp56_rac_get_prob(c, model->vector_pdi[comp][0]);
93  di |= vp56_rac_get_prob(c, model->vector_pdi[comp][1]) << 1;
95  model->vector_pdv[comp]);
96  delta = di | (delta << 2);
97  delta = (delta ^ -sign) + sign;
98  }
99  if (!comp)
100  vect->x = delta;
101  else
102  vect->y = delta;
103  }
104 }
105 
106 static void vp5_parse_vector_models(VP56Context *s)
107 {
108  VP56RangeCoder *c = &s->c;
109  VP56Model *model = s->modelp;
110  int comp, node;
111 
112  for (comp=0; comp<2; comp++) {
113  if (vp56_rac_get_prob_branchy(c, vp5_vmc_pct[comp][0]))
114  model->vector_dct[comp] = vp56_rac_gets_nn(c, 7);
115  if (vp56_rac_get_prob_branchy(c, vp5_vmc_pct[comp][1]))
116  model->vector_sig[comp] = vp56_rac_gets_nn(c, 7);
117  if (vp56_rac_get_prob_branchy(c, vp5_vmc_pct[comp][2]))
118  model->vector_pdi[comp][0] = vp56_rac_gets_nn(c, 7);
119  if (vp56_rac_get_prob_branchy(c, vp5_vmc_pct[comp][3]))
120  model->vector_pdi[comp][1] = vp56_rac_gets_nn(c, 7);
121  }
122 
123  for (comp=0; comp<2; comp++)
124  for (node=0; node<7; node++)
125  if (vp56_rac_get_prob_branchy(c, vp5_vmc_pct[comp][4 + node]))
126  model->vector_pdv[comp][node] = vp56_rac_gets_nn(c, 7);
127 }
128 
129 static int vp5_parse_coeff_models(VP56Context *s)
130 {
131  VP56RangeCoder *c = &s->c;
132  VP56Model *model = s->modelp;
133  uint8_t def_prob[11];
134  int node, cg, ctx;
135  int ct; /* code type */
136  int pt; /* plane type (0 for Y, 1 for U or V) */
137 
138  memset(def_prob, 0x80, sizeof(def_prob));
139 
140  for (pt=0; pt<2; pt++)
141  for (node=0; node<11; node++)
142  if (vp56_rac_get_prob_branchy(c, vp5_dccv_pct[pt][node])) {
143  def_prob[node] = vp56_rac_gets_nn(c, 7);
144  model->coeff_dccv[pt][node] = def_prob[node];
145  } else if (s->frames[VP56_FRAME_CURRENT]->key_frame) {
146  model->coeff_dccv[pt][node] = def_prob[node];
147  }
148 
149  for (ct=0; ct<3; ct++)
150  for (pt=0; pt<2; pt++)
151  for (cg=0; cg<6; cg++)
152  for (node=0; node<11; node++)
153  if (vp56_rac_get_prob_branchy(c, vp5_ract_pct[ct][pt][cg][node])) {
154  def_prob[node] = vp56_rac_gets_nn(c, 7);
155  model->coeff_ract[pt][ct][cg][node] = def_prob[node];
156  } else if (s->frames[VP56_FRAME_CURRENT]->key_frame) {
157  model->coeff_ract[pt][ct][cg][node] = def_prob[node];
158  }
159 
160  /* coeff_dcct is a linear combination of coeff_dccv */
161  for (pt=0; pt<2; pt++)
162  for (ctx=0; ctx<36; ctx++)
163  for (node=0; node<5; node++)
164  model->coeff_dcct[pt][ctx][node] = av_clip(((model->coeff_dccv[pt][node] * vp5_dccv_lc[node][ctx][0] + 128) >> 8) + vp5_dccv_lc[node][ctx][1], 1, 254);
165 
166  /* coeff_acct is a linear combination of coeff_ract */
167  for (ct=0; ct<3; ct++)
168  for (pt=0; pt<2; pt++)
169  for (cg=0; cg<3; cg++)
170  for (ctx=0; ctx<6; ctx++)
171  for (node=0; node<5; node++)
172  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);
173  return 0;
174 }
175 
176 static int vp5_parse_coeff(VP56Context *s)
177 {
178  VP56RangeCoder *c = &s->c;
179  VP56Model *model = s->modelp;
180  uint8_t *permute = s->idct_scantable;
181  uint8_t *model1, *model2;
182  int coeff, sign, coeff_idx;
183  int b, i, cg, idx, ctx, ctx_last;
184  int pt = 0; /* plane type (0 for Y, 1 for U or V) */
185 
186  if (c->end <= c->buffer && c->bits >= 0) {
187  av_log(s->avctx, AV_LOG_ERROR, "End of AC stream reached in vp5_parse_coeff\n");
188  return AVERROR_INVALIDDATA;
189  }
190 
191  for (b=0; b<6; b++) {
192  int ct = 1; /* code type */
193 
194  if (b > 3) pt = 1;
195 
196  ctx = 6*s->coeff_ctx[ff_vp56_b6to4[b]][0]
197  + s->above_blocks[s->above_block_idx[b]].not_null_dc;
198  model1 = model->coeff_dccv[pt];
199  model2 = model->coeff_dcct[pt][ctx];
200 
201  coeff_idx = 0;
202  for (;;) {
203  if (vp56_rac_get_prob_branchy(c, model2[0])) {
204  if (vp56_rac_get_prob_branchy(c, model2[2])) {
205  if (vp56_rac_get_prob_branchy(c, model2[3])) {
206  s->coeff_ctx[ff_vp56_b6to4[b]][coeff_idx] = 4;
207  idx = vp56_rac_get_tree(c, ff_vp56_pc_tree, model1);
208  sign = vp56_rac_get(c);
209  coeff = ff_vp56_coeff_bias[idx+5];
210  for (i=ff_vp56_coeff_bit_length[idx]; i>=0; i--)
211  coeff += vp56_rac_get_prob(c, ff_vp56_coeff_parse_table[idx][i]) << i;
212  } else {
213  if (vp56_rac_get_prob_branchy(c, model2[4])) {
214  coeff = 3 + vp56_rac_get_prob(c, model1[5]);
215  s->coeff_ctx[ff_vp56_b6to4[b]][coeff_idx] = 3;
216  } else {
217  coeff = 2;
218  s->coeff_ctx[ff_vp56_b6to4[b]][coeff_idx] = 2;
219  }
220  sign = vp56_rac_get(c);
221  }
222  ct = 2;
223  } else {
224  ct = 1;
225  s->coeff_ctx[ff_vp56_b6to4[b]][coeff_idx] = 1;
226  sign = vp56_rac_get(c);
227  coeff = 1;
228  }
229  coeff = (coeff ^ -sign) + sign;
230  if (coeff_idx)
231  coeff *= s->dequant_ac;
232  s->block_coeff[b][permute[coeff_idx]] = coeff;
233  } else {
234  if (ct && !vp56_rac_get_prob_branchy(c, model2[1]))
235  break;
236  ct = 0;
237  s->coeff_ctx[ff_vp56_b6to4[b]][coeff_idx] = 0;
238  }
239  coeff_idx++;
240  if (coeff_idx >= 64)
241  break;
242 
243  cg = vp5_coeff_groups[coeff_idx];
244  ctx = s->coeff_ctx[ff_vp56_b6to4[b]][coeff_idx];
245  model1 = model->coeff_ract[pt][ct][cg];
246  model2 = cg > 2 ? model1 : model->coeff_acct[pt][ct][cg][ctx];
247  }
248 
249  ctx_last = FFMIN(s->coeff_ctx_last[ff_vp56_b6to4[b]], 24);
250  s->coeff_ctx_last[ff_vp56_b6to4[b]] = coeff_idx;
251  if (coeff_idx < ctx_last)
252  for (i=coeff_idx; i<=ctx_last; i++)
253  s->coeff_ctx[ff_vp56_b6to4[b]][i] = 5;
254  s->above_blocks[s->above_block_idx[b]].not_null_dc = s->coeff_ctx[ff_vp56_b6to4[b]][0];
255  }
256  return 0;
257 }
258 
259 static void vp5_default_models_init(VP56Context *s)
260 {
261  VP56Model *model = s->modelp;
262  int i;
263 
264  for (i=0; i<2; i++) {
265  model->vector_sig[i] = 0x80;
266  model->vector_dct[i] = 0x80;
267  model->vector_pdi[i][0] = 0x55;
268  model->vector_pdi[i][1] = 0x80;
269  }
270  memcpy(model->mb_types_stats, ff_vp56_def_mb_types_stats, sizeof(model->mb_types_stats));
271  memset(model->vector_pdv, 0x80, sizeof(model->vector_pdv));
272 }
273 
275 {
276  VP56Context *s = avctx->priv_data;
277  int ret;
278 
279  if ((ret = ff_vp56_init(avctx, 1, 0)) < 0)
280  return ret;
281  ff_vp5dsp_init(&s->vp56dsp);
282  s->vp56_coord_div = vp5_coord_div;
283  s->parse_vector_adjustment = vp5_parse_vector_adjustment;
284  s->parse_coeff = vp5_parse_coeff;
285  s->default_models_init = vp5_default_models_init;
286  s->parse_vector_models = vp5_parse_vector_models;
287  s->parse_coeff_models = vp5_parse_coeff_models;
288  s->parse_header = vp5_parse_header;
289 
290  return 0;
291 }
292 
294  .name = "vp5",
295  .long_name = NULL_IF_CONFIG_SMALL("On2 VP5"),
296  .type = AVMEDIA_TYPE_VIDEO,
297  .id = AV_CODEC_ID_VP5,
298  .priv_data_size = sizeof(VP56Context),
300  .close = ff_vp56_free,
302  .capabilities = AV_CODEC_CAP_DR1,
303 };
av_cold int ff_vp56_free(AVCodecContext *avctx)
Definition: vp56.c:811
uint8_t coeff_ract[2][3][6][11]
Definition: vp56.h:114
const char * s
Definition: avisynth_c.h:768
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
VP5 and VP6 compatible video decoder (common features)
static av_cold int vp5_decode_init(AVCodecContext *avctx)
Definition: vp5.c:274
int ff_set_dimensions(AVCodecContext *s, int width, int height)
Check that the provided frame dimensions are valid and set them on the codec context.
Definition: utils.c:211
const uint8_t ff_vp56_coeff_bias[]
Definition: vp56data.c:67
uint8_t coeff_dccv[2][11]
Definition: vp56.h:113
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:35
uint8_t mb_types_stats[3][10][2]
Definition: vp56.h:119
static int vp5_parse_header(VP56Context *s, const uint8_t *buf, int buf_size)
Definition: vp5.c:37
uint8_t vector_sig[2]
Definition: vp56.h:108
const char * b
Definition: vf_curves.c:113
static const uint8_t vp5_coord_div[]
Definition: vp5data.h:175
static int vp5_parse_coeff_models(VP56Context *s)
Definition: vp5.c:129
#define VP56_SIZE_CHANGE
Definition: vp56.h:71
VP5 compatible video decoder.
static void vp5_parse_vector_adjustment(VP56Context *s, VP56mv *vect)
Definition: vp5.c:82
av_cold int ff_vp56_init(AVCodecContext *avctx, int flip, int has_alpha)
Definition: vp56.c:752
AVCodec.
Definition: avcodec.h:3722
static void decode(AVCodecContext *dec_ctx, AVPacket *pkt, AVFrame *frame, FILE *outfile)
Definition: decode_audio.c:42
static const uint8_t vp5_ract_pct[3][2][6][11]
Definition: vp5data.h:52
int16_t y
Definition: vp56.h:68
uint8_t
#define av_cold
Definition: attributes.h:82
float delta
static int vp5_parse_coeff(VP56Context *s)
Definition: vp5.c:176
int pt
Definition: rtp.c:35
static av_always_inline int vp56_rac_get_tree(VP56RangeCoder *c, const VP56Tree *tree, const uint8_t *probs)
Definition: vp56.h:365
#define av_log(a,...)
static const uint8_t vp5_dccv_pct[2][11]
Definition: vp5data.h:47
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
static void vp5_parse_vector_models(VP56Context *s)
Definition: vp5.c:106
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:179
static av_always_inline int vp56_rac_get(VP56RangeCoder *c)
Definition: vp56.h:289
const char * name
Name of the codec implementation.
Definition: avcodec.h:3729
void ff_vp56_init_dequant(VP56Context *s, int quantizer)
Definition: vp56.c:34
const uint8_t ff_vp56_b6to4[]
Definition: vp56data.c:29
const uint8_t * end
Definition: vp56.h:90
AVCodec ff_vp5_decoder
Definition: vp5.c:293
int ff_vp56_init_range_decoder(VP56RangeCoder *c, const uint8_t *buf, int buf_size)
Definition: vp56rac.c:40
VP5 and VP6 compatible video decoder (common data)
static av_unused int vp56_rac_gets_nn(VP56RangeCoder *c, int bits)
Definition: vp56.h:352
#define FFMIN(a, b)
Definition: common.h:96
uint8_t vector_pdi[2][2]
Definition: vp56.h:110
static const int16_t vp5_ract_lc[3][3][5][6][2]
Definition: vp5data.h:124
AVFormatContext * ctx
Definition: movenc.c:48
int ff_vp56_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
Definition: vp56.c:544
const uint8_t ff_vp56_coeff_bit_length[]
Definition: vp56data.c:68
#define vp56_rac_get_prob
Definition: vp56.h:254
static void comp(unsigned char *dst, ptrdiff_t dst_stride, unsigned char *src, ptrdiff_t src_stride, int add)
Definition: eamad.c:83
#define AVERROR_PATCHWELCOME
Not yet implemented in FFmpeg, patches welcome.
Definition: error.h:62
static const int16_t vp5_dccv_lc[5][36][2]
Definition: vp5data.h:91
static av_always_inline int vp56_rac_get_prob_branchy(VP56RangeCoder *c, int prob)
Definition: vp56.h:271
Libavcodec external API header.
const VP56Tree ff_vp56_pc_tree[]
Definition: vp56data.c:59
main external API structure.
Definition: avcodec.h:1746
static void permute(uint8_t *dst, const uint8_t *src, const uint8_t permutation[64])
Definition: proresdec2.c:40
void * buf
Definition: avisynth_c.h:690
const uint8_t ff_vp56_coeff_parse_table[6][11]
Definition: vp56data.c:31
int bits
Definition: vp56.h:87
uint8_t coeff_dcct[2][36][5]
Definition: vp56.h:116
void avpriv_report_missing_feature(void *avc, const char *msg,...) av_printf_format(2
Log a generic warning message about a missing feature.
uint8_t coeff_acct[2][3][3][6][5]
Definition: vp56.h:115
Definition: vp56.h:66
static const uint8_t vp5_vmc_pct[2][11]
Definition: vp5data.h:42
const VP56Tree ff_vp56_pva_tree[]
Definition: vp56data.c:49
int16_t x
Definition: vp56.h:67
common internal api header.
static void vp5_default_models_init(VP56Context *s)
Definition: vp5.c:259
static double c[64]
void * priv_data
Definition: avcodec.h:1788
void ff_vp5dsp_init(VP56DSPContext *s)
uint8_t vector_pdv[2][7]
Definition: vp56.h:111
static const double coeff[2][5]
Definition: vf_owdenoise.c:72
const uint8_t * buffer
Definition: vp56.h:89
static const uint8_t vp5_coeff_groups[]
Definition: vp5data.h:31
const uint8_t ff_vp56_def_mb_types_stats[3][10][2]
Definition: vp56data.c:40
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.
Definition: avcodec.h:1001
uint8_t vector_dct[2]
Definition: vp56.h:109
static int vp56_rac_gets(VP56RangeCoder *c, int bits)
Definition: vp56.h:313