FFmpeg
asvdec.c
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1 /*
2  * Copyright (c) 2003 Michael Niedermayer
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  * ASUS V1/V2 decoder.
24  */
25 
26 #include "libavutil/attributes.h"
27 #include "libavutil/mem.h"
28 
29 #include "asv.h"
30 #include "avcodec.h"
31 #include "blockdsp.h"
32 #include "idctdsp.h"
33 #include "internal.h"
34 #include "mpeg12data.h"
35 
36 #define CCP_VLC_BITS 5
37 #define DC_CCP_VLC_BITS 4
38 #define AC_CCP_VLC_BITS 6
39 #define ASV1_LEVEL_VLC_BITS 4
40 #define ASV2_LEVEL_VLC_BITS 10
41 
42 static VLC ccp_vlc;
43 static VLC level_vlc;
44 static VLC dc_ccp_vlc;
45 static VLC ac_ccp_vlc;
47 
49 {
50  static int done = 0;
51 
52  if (!done) {
53  done = 1;
54 
55  INIT_VLC_STATIC(&ccp_vlc, CCP_VLC_BITS, 17,
56  &ff_asv_ccp_tab[0][1], 2, 1,
57  &ff_asv_ccp_tab[0][0], 2, 1, 32);
58  INIT_LE_VLC_STATIC(&dc_ccp_vlc, DC_CCP_VLC_BITS, 8,
59  &ff_asv_dc_ccp_tab[0][1], 2, 1,
60  &ff_asv_dc_ccp_tab[0][0], 2, 1, 16);
61  INIT_LE_VLC_STATIC(&ac_ccp_vlc, AC_CCP_VLC_BITS, 16,
62  &ff_asv_ac_ccp_tab[0][1], 2, 1,
63  &ff_asv_ac_ccp_tab[0][0], 2, 1, 64);
64  INIT_VLC_STATIC(&level_vlc, ASV1_LEVEL_VLC_BITS, 7,
65  &ff_asv_level_tab[0][1], 2, 1,
66  &ff_asv_level_tab[0][0], 2, 1, 16);
67  INIT_LE_VLC_STATIC(&asv2_level_vlc, ASV2_LEVEL_VLC_BITS, 63,
68  &ff_asv2_level_tab[0][1], 4, 2,
69  &ff_asv2_level_tab[0][0], 4, 2, 1024);
70  }
71 }
72 
73 static inline int asv1_get_level(GetBitContext *gb)
74 {
75  int code = get_vlc2(gb, level_vlc.table, ASV1_LEVEL_VLC_BITS, 1);
76 
77  if (code == 3)
78  return get_sbits(gb, 8);
79  else
80  return code - 3;
81 }
82 
83 // get_vlc2() is big-endian in this file
84 static inline int asv2_get_vlc2(GetBitContext *gb, VLC_TYPE (*table)[2], int bits)
85 {
86  unsigned int index;
87  int code, n;
88 
89  OPEN_READER(re, gb);
90  UPDATE_CACHE_LE(re, gb);
91 
92  index = SHOW_UBITS_LE(re, gb, bits);
93  code = table[index][0];
94  n = table[index][1];
95  LAST_SKIP_BITS(re, gb, n);
96 
97  CLOSE_READER(re, gb);
98 
99  return code;
100 }
101 
102 static inline int asv2_get_level(GetBitContext *gb)
103 {
104  int code = asv2_get_vlc2(gb, asv2_level_vlc.table, ASV2_LEVEL_VLC_BITS);
105 
106  if (code == 31)
107  return (int8_t) get_bits_le(gb, 8);
108  else
109  return code - 31;
110 }
111 
112 static inline int asv1_decode_block(ASV1Context *a, int16_t block[64])
113 {
114  int i;
115 
116  block[0] = 8 * get_bits(&a->gb, 8);
117 
118  for (i = 0; i < 11; i++) {
119  const int ccp = get_vlc2(&a->gb, ccp_vlc.table, CCP_VLC_BITS, 1);
120 
121  if (ccp) {
122  if (ccp == 16)
123  break;
124  if (ccp < 0 || i >= 10) {
125  av_log(a->avctx, AV_LOG_ERROR, "coded coeff pattern damaged\n");
126  return AVERROR_INVALIDDATA;
127  }
128 
129  if (ccp & 8)
130  block[a->scantable.permutated[4 * i + 0]] = (asv1_get_level(&a->gb) * a->intra_matrix[4 * i + 0]) >> 4;
131  if (ccp & 4)
132  block[a->scantable.permutated[4 * i + 1]] = (asv1_get_level(&a->gb) * a->intra_matrix[4 * i + 1]) >> 4;
133  if (ccp & 2)
134  block[a->scantable.permutated[4 * i + 2]] = (asv1_get_level(&a->gb) * a->intra_matrix[4 * i + 2]) >> 4;
135  if (ccp & 1)
136  block[a->scantable.permutated[4 * i + 3]] = (asv1_get_level(&a->gb) * a->intra_matrix[4 * i + 3]) >> 4;
137  }
138  }
139 
140  return 0;
141 }
142 
143 static inline int asv2_decode_block(ASV1Context *a, int16_t block[64])
144 {
145  int i, count, ccp;
146 
147  count = get_bits_le(&a->gb, 4);
148 
149  block[0] = 8 * get_bits_le(&a->gb, 8);
150 
151  ccp = asv2_get_vlc2(&a->gb, dc_ccp_vlc.table, DC_CCP_VLC_BITS);
152  if (ccp) {
153  if (ccp & 4)
154  block[a->scantable.permutated[1]] = (asv2_get_level(&a->gb) * a->intra_matrix[1]) >> 4;
155  if (ccp & 2)
156  block[a->scantable.permutated[2]] = (asv2_get_level(&a->gb) * a->intra_matrix[2]) >> 4;
157  if (ccp & 1)
158  block[a->scantable.permutated[3]] = (asv2_get_level(&a->gb) * a->intra_matrix[3]) >> 4;
159  }
160 
161  for (i = 1; i < count + 1; i++) {
162  const int ccp = asv2_get_vlc2(&a->gb, ac_ccp_vlc.table, AC_CCP_VLC_BITS);
163 
164  if (ccp) {
165  if (ccp & 8)
166  block[a->scantable.permutated[4 * i + 0]] = (asv2_get_level(&a->gb) * a->intra_matrix[4 * i + 0]) >> 4;
167  if (ccp & 4)
168  block[a->scantable.permutated[4 * i + 1]] = (asv2_get_level(&a->gb) * a->intra_matrix[4 * i + 1]) >> 4;
169  if (ccp & 2)
170  block[a->scantable.permutated[4 * i + 2]] = (asv2_get_level(&a->gb) * a->intra_matrix[4 * i + 2]) >> 4;
171  if (ccp & 1)
172  block[a->scantable.permutated[4 * i + 3]] = (asv2_get_level(&a->gb) * a->intra_matrix[4 * i + 3]) >> 4;
173  }
174  }
175 
176  return 0;
177 }
178 
179 static inline int decode_mb(ASV1Context *a, int16_t block[6][64])
180 {
181  int i, ret;
182 
183  a->bdsp.clear_blocks(block[0]);
184 
185  if (a->avctx->codec_id == AV_CODEC_ID_ASV1) {
186  for (i = 0; i < 6; i++) {
187  if ((ret = asv1_decode_block(a, block[i])) < 0)
188  return ret;
189  }
190  } else {
191  for (i = 0; i < 6; i++) {
192  if ((ret = asv2_decode_block(a, block[i])) < 0)
193  return ret;
194  }
195  }
196  return 0;
197 }
198 
199 static inline void idct_put(ASV1Context *a, AVFrame *frame, int mb_x, int mb_y)
200 {
201  int16_t(*block)[64] = a->block;
202  int linesize = frame->linesize[0];
203 
204  uint8_t *dest_y = frame->data[0] + (mb_y * 16 * linesize) + mb_x * 16;
205  uint8_t *dest_cb = frame->data[1] + (mb_y * 8 * frame->linesize[1]) + mb_x * 8;
206  uint8_t *dest_cr = frame->data[2] + (mb_y * 8 * frame->linesize[2]) + mb_x * 8;
207 
208  a->idsp.idct_put(dest_y, linesize, block[0]);
209  a->idsp.idct_put(dest_y + 8, linesize, block[1]);
210  a->idsp.idct_put(dest_y + 8 * linesize, linesize, block[2]);
211  a->idsp.idct_put(dest_y + 8 * linesize + 8, linesize, block[3]);
212 
213  if (!(a->avctx->flags & AV_CODEC_FLAG_GRAY)) {
214  a->idsp.idct_put(dest_cb, frame->linesize[1], block[4]);
215  a->idsp.idct_put(dest_cr, frame->linesize[2], block[5]);
216  }
217 }
218 
219 static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
220  AVPacket *avpkt)
221 {
222  ASV1Context *const a = avctx->priv_data;
223  const uint8_t *buf = avpkt->data;
224  int buf_size = avpkt->size;
225  AVFrame *const p = data;
226  int mb_x, mb_y, ret;
227 
228  if (buf_size * 8LL < a->mb_height * a->mb_width * 13LL)
229  return AVERROR_INVALIDDATA;
230 
231  if ((ret = ff_get_buffer(avctx, p, 0)) < 0)
232  return ret;
234  p->key_frame = 1;
235 
236  if (avctx->codec_id == AV_CODEC_ID_ASV1) {
238  buf_size);
239  if (!a->bitstream_buffer)
240  return AVERROR(ENOMEM);
241 
242  a->bbdsp.bswap_buf((uint32_t *) a->bitstream_buffer,
243  (const uint32_t *) buf, buf_size / 4);
244  ret = init_get_bits8(&a->gb, a->bitstream_buffer, buf_size);
245  } else {
246  ret = init_get_bits8_le(&a->gb, buf, buf_size);
247  }
248  if (ret < 0)
249  return ret;
250 
251  for (mb_y = 0; mb_y < a->mb_height2; mb_y++) {
252  for (mb_x = 0; mb_x < a->mb_width2; mb_x++) {
253  if ((ret = decode_mb(a, a->block)) < 0)
254  return ret;
255 
256  idct_put(a, p, mb_x, mb_y);
257  }
258  }
259 
260  if (a->mb_width2 != a->mb_width) {
261  mb_x = a->mb_width2;
262  for (mb_y = 0; mb_y < a->mb_height2; mb_y++) {
263  if ((ret = decode_mb(a, a->block)) < 0)
264  return ret;
265 
266  idct_put(a, p, mb_x, mb_y);
267  }
268  }
269 
270  if (a->mb_height2 != a->mb_height) {
271  mb_y = a->mb_height2;
272  for (mb_x = 0; mb_x < a->mb_width; mb_x++) {
273  if ((ret = decode_mb(a, a->block)) < 0)
274  return ret;
275 
276  idct_put(a, p, mb_x, mb_y);
277  }
278  }
279 
280  *got_frame = 1;
281 
282  emms_c();
283 
284  return (get_bits_count(&a->gb) + 31) / 32 * 4;
285 }
286 
288 {
289  ASV1Context *const a = avctx->priv_data;
290  const int scale = avctx->codec_id == AV_CODEC_ID_ASV1 ? 1 : 2;
291  int i;
292 
293  if (avctx->extradata_size < 1) {
294  av_log(avctx, AV_LOG_WARNING, "No extradata provided\n");
295  }
296 
297  ff_asv_common_init(avctx);
298  ff_blockdsp_init(&a->bdsp, avctx);
299  ff_idctdsp_init(&a->idsp, avctx);
300  init_vlcs(a);
302  avctx->pix_fmt = AV_PIX_FMT_YUV420P;
303 
304  if (avctx->extradata_size < 1 || (a->inv_qscale = avctx->extradata[0]) == 0) {
305  av_log(avctx, AV_LOG_ERROR, "illegal qscale 0\n");
306  if (avctx->codec_id == AV_CODEC_ID_ASV1)
307  a->inv_qscale = 6;
308  else
309  a->inv_qscale = 10;
310  }
311 
312  for (i = 0; i < 64; i++) {
313  int index = ff_asv_scantab[i];
314 
315  a->intra_matrix[i] = 64 * scale * ff_mpeg1_default_intra_matrix[index] /
316  a->inv_qscale;
317  }
318 
319  return 0;
320 }
321 
323 {
324  ASV1Context *const a = avctx->priv_data;
325 
327  a->bitstream_buffer_size = 0;
328 
329  return 0;
330 }
331 
332 #if CONFIG_ASV1_DECODER
334  .name = "asv1",
335  .long_name = NULL_IF_CONFIG_SMALL("ASUS V1"),
336  .type = AVMEDIA_TYPE_VIDEO,
337  .id = AV_CODEC_ID_ASV1,
338  .priv_data_size = sizeof(ASV1Context),
339  .init = decode_init,
340  .close = decode_end,
341  .decode = decode_frame,
342  .capabilities = AV_CODEC_CAP_DR1,
343 };
344 #endif
345 
346 #if CONFIG_ASV2_DECODER
348  .name = "asv2",
349  .long_name = NULL_IF_CONFIG_SMALL("ASUS V2"),
350  .type = AVMEDIA_TYPE_VIDEO,
351  .id = AV_CODEC_ID_ASV2,
352  .priv_data_size = sizeof(ASV1Context),
353  .init = decode_init,
354  .decode = decode_frame,
355  .capabilities = AV_CODEC_CAP_DR1,
356 };
357 #endif
static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
Definition: asvdec.c:219
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
This structure describes decoded (raw) audio or video data.
Definition: frame.h:308
const uint8_t ff_asv_ac_ccp_tab[16][2]
Definition: asv.c:60
#define AC_CCP_VLC_BITS
Definition: asvdec.c:38
static int asv2_get_vlc2(GetBitContext *gb, VLC_TYPE(*table)[2], int bits)
Definition: asvdec.c:84
ptrdiff_t const GLvoid * data
Definition: opengl_enc.c:100
float re
Definition: fft.c:82
static unsigned int get_bits(GetBitContext *s, int n)
Read 1-25 bits.
Definition: get_bits.h:379
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:200
Memory handling functions.
int16_t block[6][64]
Definition: asv.h:57
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:35
#define INIT_VLC_STATIC(vlc, bits, a, b, c, d, e, f, g, static_size)
Definition: vlc.h:84
int size
Definition: packet.h:364
AVCodecContext * avctx
Definition: asv.h:43
av_cold void ff_blockdsp_init(BlockDSPContext *c, AVCodecContext *avctx)
Definition: blockdsp.c:60
IDCTDSPContext idsp
Definition: asv.h:47
The reader does not expect b to be semantically here and if the code is changed by maybe adding a a division or other the signedness will almost certainly be mistaken To avoid this confusion a new type was SUINT is the C unsigned type but it holds a signed int to use the same example SUINT a
Definition: undefined.txt:36
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:736
void av_fast_padded_malloc(void *ptr, unsigned int *size, size_t min_size)
Same behaviour av_fast_malloc but the buffer has additional AV_INPUT_BUFFER_PADDING_SIZE at the end w...
Definition: utils.c:72
uint8_t permutated[64]
Definition: idctdsp.h:33
static int asv2_decode_block(ASV1Context *a, int16_t block[64])
Definition: asvdec.c:143
unsigned int bitstream_buffer_size
Definition: asv.h:61
AVCodec.
Definition: codec.h:190
static int get_sbits(GetBitContext *s, int n)
Definition: get_bits.h:359
static void decode(AVCodecContext *dec_ctx, AVPacket *pkt, AVFrame *frame, FILE *outfile)
Definition: decode_audio.c:71
Macro definitions for various function/variable attributes.
The exact code depends on how similar the blocks are and how related they are to the block
static av_cold int decode_init(AVCodecContext *avctx)
Definition: asvdec.c:287
uint8_t
#define av_cold
Definition: attributes.h:88
uint8_t * bitstream_buffer
Definition: asv.h:60
static VLC asv2_level_vlc
Definition: asvdec.c:46
void(* bswap_buf)(uint32_t *dst, const uint32_t *src, int w)
Definition: bswapdsp.h:25
uint8_t * extradata
some codecs need / can use extradata like Huffman tables.
Definition: avcodec.h:627
#define INIT_LE_VLC_STATIC(vlc, bits, a, b, c, d, e, f, g, static_size)
Definition: vlc.h:87
const uint8_t ff_asv_ccp_tab[17][2]
Definition: asv.c:43
static int asv2_get_level(GetBitContext *gb)
Definition: asvdec.c:102
uint8_t * data
Definition: packet.h:363
static int get_bits_count(const GetBitContext *s)
Definition: get_bits.h:219
const uint8_t ff_asv_dc_ccp_tab[8][2]
Definition: asv.c:55
int mb_height2
Definition: asv.h:56
#define AV_CODEC_FLAG_GRAY
Only decode/encode grayscale.
Definition: avcodec.h:308
#define SHOW_UBITS_LE(name, gb, num)
Definition: get_bits.h:201
#define av_log(a,...)
#define ASV1_LEVEL_VLC_BITS
Definition: asvdec.c:39
static const uint16_t table[]
Definition: prosumer.c:206
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:194
BswapDSPContext bbdsp
Definition: asv.h:45
void(* clear_blocks)(int16_t *blocks)
Definition: blockdsp.h:37
av_cold void ff_asv_common_init(AVCodecContext *avctx)
Definition: asv.c:89
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:153
int flags
AV_CODEC_FLAG_*.
Definition: avcodec.h:606
const char * name
Name of the codec implementation.
Definition: codec.h:197
uint8_t bits
Definition: vp3data.h:202
#define ASV2_LEVEL_VLC_BITS
Definition: asvdec.c:40
uint16_t intra_matrix[64]
Definition: asv.h:58
GLsizei count
Definition: opengl_enc.c:108
#define CLOSE_READER(name, gb)
Definition: get_bits.h:149
ASUS V1/V2 encoder/decoder common data.
Definition: vlc.h:26
#define DC_CCP_VLC_BITS
Definition: asvdec.c:37
ScanTable scantable
Definition: asv.h:51
GetBitContext gb
Definition: asv.h:50
enum AVPictureType pict_type
Picture type of the frame.
Definition: frame.h:391
static VLC level_vlc
Definition: asvdec.c:43
static int decode_mb(ASV1Context *a, int16_t block[6][64])
Definition: asvdec.c:179
these buffered frames must be flushed immediately if a new input produces new the filter must not call request_frame to get more It must just process the frame or queue it The task of requesting more frames is left to the filter s request_frame method or the application If a filter has several the filter must be ready for frames arriving randomly on any input any filter with several inputs will most likely require some kind of queuing mechanism It is perfectly acceptable to have a limited queue and to drop frames when the inputs are too unbalanced request_frame For filters that do not use the this method is called when a frame is wanted on an output For a it should directly call filter_frame on the corresponding output For a if there are queued frames already one of these frames should be pushed If the filter should request a frame on one of its repeatedly until at least one frame has been pushed Return or at least make progress towards producing a frame
static VLC ccp_vlc
Definition: asvdec.c:42
#define LAST_SKIP_BITS(name, gb, num)
Definition: get_bits.h:199
static av_always_inline int get_vlc2(GetBitContext *s, VLC_TYPE(*table)[2], int bits, int max_depth)
Parse a vlc code.
Definition: get_bits.h:797
uint8_t idct_permutation[64]
IDCT input permutation.
Definition: idctdsp.h:96
int mb_width
Definition: asv.h:53
void(* idct_put)(uint8_t *dest, ptrdiff_t line_size, int16_t *block)
block -> idct -> clip to unsigned 8 bit -> dest.
Definition: idctdsp.h:72
Libavcodec external API header.
static VLC ac_ccp_vlc
Definition: asvdec.c:45
enum AVCodecID codec_id
Definition: avcodec.h:536
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:339
static int init_get_bits8(GetBitContext *s, const uint8_t *buffer, int byte_size)
Initialize GetBitContext.
Definition: get_bits.h:677
main external API structure.
Definition: avcodec.h:526
static VLC dc_ccp_vlc
Definition: asvdec.c:44
MPEG-1/2 tables.
#define OPEN_READER(name, gb)
Definition: get_bits.h:138
int ff_get_buffer(AVCodecContext *avctx, AVFrame *frame, int flags)
Get a buffer for a frame.
Definition: decode.c:1879
int extradata_size
Definition: avcodec.h:628
#define CCP_VLC_BITS
Definition: asvdec.c:36
int index
Definition: gxfenc.c:89
#define UPDATE_CACHE_LE(name, gb)
Definition: get_bits.h:161
const uint16_t ff_mpeg1_default_intra_matrix[256]
Definition: mpeg12data.c:30
const uint16_t ff_asv2_level_tab[63][2]
Definition: asv.c:67
int mb_width2
Definition: asv.h:55
and forward the test the status of outputs and forward it to the corresponding return FFERROR_NOT_READY If the filters stores internally one or a few frame for some it can consider them to be part of the FIFO and delay acknowledging a status change accordingly Example code
static void idct_put(ASV1Context *a, AVFrame *frame, int mb_x, int mb_y)
Definition: asvdec.c:199
static unsigned int get_bits_le(GetBitContext *s, int n)
Definition: get_bits.h:420
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:322
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
Definition: pixfmt.h:66
int inv_qscale
Definition: asv.h:52
common internal api header.
static int init_get_bits8_le(GetBitContext *s, const uint8_t *buffer, int byte_size)
Definition: get_bits.h:685
void * priv_data
Definition: avcodec.h:553
av_cold void ff_init_scantable(uint8_t *permutation, ScanTable *st, const uint8_t *src_scantable)
Definition: idctdsp.c:29
av_cold void ff_idctdsp_init(IDCTDSPContext *c, AVCodecContext *avctx)
Definition: idctdsp.c:238
VLC_TYPE(* table)[2]
code, bits
Definition: vlc.h:28
static av_cold void init_vlcs(ASV1Context *a)
Definition: asvdec.c:48
int key_frame
1 -> keyframe, 0-> not
Definition: frame.h:386
static int asv1_get_level(GetBitContext *gb)
Definition: asvdec.c:73
#define av_freep(p)
#define VLC_TYPE
Definition: vlc.h:24
static int asv1_decode_block(ASV1Context *a, int16_t block[64])
Definition: asvdec.c:112
const uint8_t ff_asv_scantab[64]
Definition: asv.c:32
static av_cold int decode_end(AVCodecContext *avctx)
Definition: asvdec.c:322
Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample they are references to shared objects When the negotiation mechanism computes the intersection of the formats supported at each end of a all references to both lists are replaced with a reference to the intersection And when a single format is eventually chosen for a link amongst the remaining all references to the list are updated That means that if a filter requires that its input and output have the same format amongst a supported all it has to do is use a reference to the same list of formats query_formats can leave some formats unset and return AVERROR(EAGAIN) to cause the negotiation mechanism toagain later.That can be used by filters with complex requirements to use the format negotiated on one link to set the formats supported on another.Frame references ownership and permissions
const uint8_t ff_asv_level_tab[7][2]
Definition: asv.c:51
This structure stores compressed data.
Definition: packet.h:340
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.
Definition: codec.h:50
AVCodec ff_asv2_decoder
int mb_height
Definition: asv.h:54
AVCodec ff_asv1_decoder
int i
Definition: input.c:407
BlockDSPContext bdsp
Definition: asv.h:44