FFmpeg
asvenc.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 encoder.
24  */
25 
26 #include "libavutil/attributes.h"
27 #include "libavutil/mem.h"
28 
29 #include "aandcttab.h"
30 #include "asv.h"
31 #include "avcodec.h"
32 #include "dct.h"
33 #include "fdctdsp.h"
34 #include "internal.h"
35 #include "mpeg12data.h"
36 
37 static inline void asv1_put_level(PutBitContext *pb, int level)
38 {
39  unsigned int index = level + 3;
40 
41  if (index <= 6) {
42  put_bits(pb, ff_asv_level_tab[index][1], ff_asv_level_tab[index][0]);
43  } else {
44  put_bits(pb, 3, 0); /* Escape code */
45  put_sbits(pb, 8, level);
46  }
47 }
48 
49 static inline void asv2_put_level(ASV1Context *a, PutBitContext *pb, int level)
50 {
51  unsigned int index = level + 31;
52 
53  if (index <= 62) {
54  put_bits_le(pb, ff_asv2_level_tab[index][1], ff_asv2_level_tab[index][0]);
55  } else {
56  put_bits_le(pb, 5, 0); /* Escape code */
57  if (level < -128 || level > 127) {
58  av_log(a->avctx, AV_LOG_WARNING, "Clipping level %d, increase qscale\n", level);
59  level = av_clip_int8(level);
60  }
61  put_bits_le(pb, 8, level & 0xFF);
62  }
63 }
64 
65 static inline void asv1_encode_block(ASV1Context *a, int16_t block[64])
66 {
67  int i;
68  int nc_count = 0;
69 
70  put_bits(&a->pb, 8, (block[0] + 32) >> 6);
71  block[0] = 0;
72 
73  for (i = 0; i < 10; i++) {
74  const int index = ff_asv_scantab[4 * i];
75  int ccp = 0;
76 
77  if ((block[index + 0] = (block[index + 0] *
78  a->q_intra_matrix[index + 0] + (1 << 15)) >> 16))
79  ccp |= 8;
80  if ((block[index + 8] = (block[index + 8] *
81  a->q_intra_matrix[index + 8] + (1 << 15)) >> 16))
82  ccp |= 4;
83  if ((block[index + 1] = (block[index + 1] *
84  a->q_intra_matrix[index + 1] + (1 << 15)) >> 16))
85  ccp |= 2;
86  if ((block[index + 9] = (block[index + 9] *
87  a->q_intra_matrix[index + 9] + (1 << 15)) >> 16))
88  ccp |= 1;
89 
90  if (ccp) {
91  for (; nc_count; nc_count--)
92  put_bits(&a->pb, 2, 2); /* Skip */
93 
94  put_bits(&a->pb, ff_asv_ccp_tab[ccp][1], ff_asv_ccp_tab[ccp][0]);
95 
96  if (ccp & 8)
97  asv1_put_level(&a->pb, block[index + 0]);
98  if (ccp & 4)
99  asv1_put_level(&a->pb, block[index + 8]);
100  if (ccp & 2)
101  asv1_put_level(&a->pb, block[index + 1]);
102  if (ccp & 1)
103  asv1_put_level(&a->pb, block[index + 9]);
104  } else {
105  nc_count++;
106  }
107  }
108  put_bits(&a->pb, 5, 0xF); /* End of block */
109 }
110 
111 static inline void asv2_encode_block(ASV1Context *a, int16_t block[64])
112 {
113  int i;
114  int count = 0;
115 
116  for (count = 63; count > 3; count--) {
117  const int index = ff_asv_scantab[count];
118  if ((block[index] * a->q_intra_matrix[index] + (1 << 15)) >> 16)
119  break;
120  }
121 
122  count >>= 2;
123 
124  put_bits_le(&a->pb, 4, count);
125  put_bits_le(&a->pb, 8, (block[0] + 32) >> 6);
126  block[0] = 0;
127 
128  for (i = 0; i <= count; i++) {
129  const int index = ff_asv_scantab[4 * i];
130  int ccp = 0;
131 
132  if ((block[index + 0] = (block[index + 0] *
133  a->q_intra_matrix[index + 0] + (1 << 15)) >> 16))
134  ccp |= 8;
135  if ((block[index + 8] = (block[index + 8] *
136  a->q_intra_matrix[index + 8] + (1 << 15)) >> 16))
137  ccp |= 4;
138  if ((block[index + 1] = (block[index + 1] *
139  a->q_intra_matrix[index + 1] + (1 << 15)) >> 16))
140  ccp |= 2;
141  if ((block[index + 9] = (block[index + 9] *
142  a->q_intra_matrix[index + 9] + (1 << 15)) >> 16))
143  ccp |= 1;
144 
145  av_assert2(i || ccp < 8);
146  if (i)
147  put_bits_le(&a->pb, ff_asv_ac_ccp_tab[ccp][1], ff_asv_ac_ccp_tab[ccp][0]);
148  else
149  put_bits_le(&a->pb, ff_asv_dc_ccp_tab[ccp][1], ff_asv_dc_ccp_tab[ccp][0]);
150 
151  if (ccp) {
152  if (ccp & 8)
153  asv2_put_level(a, &a->pb, block[index + 0]);
154  if (ccp & 4)
155  asv2_put_level(a, &a->pb, block[index + 8]);
156  if (ccp & 2)
157  asv2_put_level(a, &a->pb, block[index + 1]);
158  if (ccp & 1)
159  asv2_put_level(a, &a->pb, block[index + 9]);
160  }
161  }
162 }
163 
164 #define MAX_MB_SIZE (30 * 16 * 16 * 3 / 2 / 8)
165 
166 static inline int encode_mb(ASV1Context *a, int16_t block[6][64])
167 {
168  int i;
169 
170  av_assert0(a->pb.buf_end - a->pb.buf - (put_bits_count(&a->pb) >> 3) >= MAX_MB_SIZE);
171 
172  if (a->avctx->codec_id == AV_CODEC_ID_ASV1) {
173  for (i = 0; i < 6; i++)
174  asv1_encode_block(a, block[i]);
175  } else {
176  for (i = 0; i < 6; i++) {
177  asv2_encode_block(a, block[i]);
178  }
179  }
180  return 0;
181 }
182 
183 static inline void dct_get(ASV1Context *a, const AVFrame *frame,
184  int mb_x, int mb_y)
185 {
186  int16_t (*block)[64] = a->block;
187  int linesize = frame->linesize[0];
188  int i;
189 
190  uint8_t *ptr_y = frame->data[0] + (mb_y * 16 * linesize) + mb_x * 16;
191  uint8_t *ptr_cb = frame->data[1] + (mb_y * 8 * frame->linesize[1]) + mb_x * 8;
192  uint8_t *ptr_cr = frame->data[2] + (mb_y * 8 * frame->linesize[2]) + mb_x * 8;
193 
194  a->pdsp.get_pixels(block[0], ptr_y, linesize);
195  a->pdsp.get_pixels(block[1], ptr_y + 8, linesize);
196  a->pdsp.get_pixels(block[2], ptr_y + 8 * linesize, linesize);
197  a->pdsp.get_pixels(block[3], ptr_y + 8 * linesize + 8, linesize);
198  for (i = 0; i < 4; i++)
199  a->fdsp.fdct(block[i]);
200 
201  if (!(a->avctx->flags & AV_CODEC_FLAG_GRAY)) {
202  a->pdsp.get_pixels(block[4], ptr_cb, frame->linesize[1]);
203  a->pdsp.get_pixels(block[5], ptr_cr, frame->linesize[2]);
204  for (i = 4; i < 6; i++)
205  a->fdsp.fdct(block[i]);
206  }
207 }
208 
210  const AVFrame *pict, int *got_packet)
211 {
212  ASV1Context *const a = avctx->priv_data;
213  int size, ret;
214  int mb_x, mb_y;
215 
216  if (pict->width % 16 || pict->height % 16) {
217  AVFrame *clone = av_frame_alloc();
218  int i;
219 
220  if (!clone)
221  return AVERROR(ENOMEM);
222  clone->format = pict->format;
223  clone->width = FFALIGN(pict->width, 16);
224  clone->height = FFALIGN(pict->height, 16);
225  ret = av_frame_get_buffer(clone, 0);
226  if (ret < 0) {
227  av_frame_free(&clone);
228  return ret;
229  }
230 
231  ret = av_frame_copy(clone, pict);
232  if (ret < 0) {
233  av_frame_free(&clone);
234  return ret;
235  }
236 
237  for (i = 0; i<3; i++) {
238  int x, y;
239  int w = AV_CEIL_RSHIFT(pict->width, !!i);
240  int h = AV_CEIL_RSHIFT(pict->height, !!i);
241  int w2 = AV_CEIL_RSHIFT(clone->width, !!i);
242  int h2 = AV_CEIL_RSHIFT(clone->height, !!i);
243  for (y=0; y<h; y++)
244  for (x=w; x<w2; x++)
245  clone->data[i][x + y*clone->linesize[i]] =
246  clone->data[i][w - 1 + y*clone->linesize[i]];
247  for (y=h; y<h2; y++)
248  for (x=0; x<w2; x++)
249  clone->data[i][x + y*clone->linesize[i]] =
250  clone->data[i][x + (h-1)*clone->linesize[i]];
251  }
252  ret = encode_frame(avctx, pkt, clone, got_packet);
253 
254  av_frame_free(&clone);
255  return ret;
256  }
257 
258  if ((ret = ff_alloc_packet2(avctx, pkt, a->mb_height * a->mb_width * MAX_MB_SIZE +
259  AV_INPUT_BUFFER_MIN_SIZE, 0)) < 0)
260  return ret;
261 
262  init_put_bits(&a->pb, pkt->data, pkt->size);
263 
264  for (mb_y = 0; mb_y < a->mb_height2; mb_y++) {
265  for (mb_x = 0; mb_x < a->mb_width2; mb_x++) {
266  dct_get(a, pict, mb_x, mb_y);
267  encode_mb(a, a->block);
268  }
269  }
270 
271  if (a->mb_width2 != a->mb_width) {
272  mb_x = a->mb_width2;
273  for (mb_y = 0; mb_y < a->mb_height2; mb_y++) {
274  dct_get(a, pict, mb_x, mb_y);
275  encode_mb(a, a->block);
276  }
277  }
278 
279  if (a->mb_height2 != a->mb_height) {
280  mb_y = a->mb_height2;
281  for (mb_x = 0; mb_x < a->mb_width; mb_x++) {
282  dct_get(a, pict, mb_x, mb_y);
283  encode_mb(a, a->block);
284  }
285  }
286  emms_c();
287 
288  if (avctx->codec_id == AV_CODEC_ID_ASV1)
289  flush_put_bits(&a->pb);
290  else
291  flush_put_bits_le(&a->pb);
292  AV_WN32(put_bits_ptr(&a->pb), 0);
293  size = (put_bits_count(&a->pb) + 31) / 32;
294 
295  if (avctx->codec_id == AV_CODEC_ID_ASV1) {
296  a->bbdsp.bswap_buf((uint32_t *) pkt->data,
297  (uint32_t *) pkt->data, size);
298  }
299 
300  pkt->size = size * 4;
301  pkt->flags |= AV_PKT_FLAG_KEY;
302  *got_packet = 1;
303 
304  return 0;
305 }
306 
308 {
309  ASV1Context *const a = avctx->priv_data;
310  int i;
311  const int scale = avctx->codec_id == AV_CODEC_ID_ASV1 ? 1 : 2;
312 
313  ff_asv_common_init(avctx);
314  ff_fdctdsp_init(&a->fdsp, avctx);
315  ff_pixblockdsp_init(&a->pdsp, avctx);
316 
317  if (avctx->global_quality <= 0)
318  avctx->global_quality = 4 * FF_QUALITY_SCALE;
319 
320  a->inv_qscale = (32 * scale * FF_QUALITY_SCALE +
321  avctx->global_quality / 2) / avctx->global_quality;
322 
323  avctx->extradata = av_mallocz(8);
324  if (!avctx->extradata)
325  return AVERROR(ENOMEM);
326  avctx->extradata_size = 8;
327  ((uint32_t *) avctx->extradata)[0] = av_le2ne32(a->inv_qscale);
328  ((uint32_t *) avctx->extradata)[1] = av_le2ne32(AV_RL32("ASUS"));
329 
330  for (i = 0; i < 64; i++) {
331  if (a->fdsp.fdct == ff_fdct_ifast) {
332  int q = 32LL * scale * ff_mpeg1_default_intra_matrix[i] * ff_aanscales[i];
333  a->q_intra_matrix[i] = (((int64_t)a->inv_qscale << 30) + q / 2) / q;
334  } else {
335  int q = 32 * scale * ff_mpeg1_default_intra_matrix[i];
336  a->q_intra_matrix[i] = ((a->inv_qscale << 16) + q / 2) / q;
337  }
338  }
339 
340  return 0;
341 }
342 
343 #if CONFIG_ASV1_ENCODER
345  .name = "asv1",
346  .long_name = NULL_IF_CONFIG_SMALL("ASUS V1"),
347  .type = AVMEDIA_TYPE_VIDEO,
348  .id = AV_CODEC_ID_ASV1,
349  .priv_data_size = sizeof(ASV1Context),
350  .init = encode_init,
351  .encode2 = encode_frame,
352  .pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P,
353  AV_PIX_FMT_NONE },
354  .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,
355 };
356 #endif
357 
358 #if CONFIG_ASV2_ENCODER
360  .name = "asv2",
361  .long_name = NULL_IF_CONFIG_SMALL("ASUS V2"),
362  .type = AVMEDIA_TYPE_VIDEO,
363  .id = AV_CODEC_ID_ASV2,
364  .priv_data_size = sizeof(ASV1Context),
365  .init = encode_init,
366  .encode2 = encode_frame,
367  .pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P,
368  AV_PIX_FMT_NONE },
369  .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,
370 };
371 #endif
static int encode_frame(AVCodecContext *avctx, AVPacket *pkt, const AVFrame *pict, int *got_packet)
Definition: asvenc.c:209
This structure describes decoded (raw) audio or video data.
Definition: frame.h:314
const uint8_t ff_asv_ac_ccp_tab[16][2]
Definition: asv.c:60
void ff_fdct_ifast(int16_t *data)
Definition: jfdctfst.c:208
static void put_sbits(PutBitContext *pb, int n, int32_t value)
Definition: put_bits.h:260
static void put_bits(Jpeg2000EncoderContext *s, int val, int n)
put n times val bit
Definition: j2kenc.c:218
#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
int size
Definition: packet.h:364
AVCodecContext * avctx
Definition: asv.h:43
#define FF_QUALITY_SCALE
Definition: avutil.h:230
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
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
Definition: mem.c:237
static AVPacket pkt
#define av_le2ne32(x)
Definition: bswap.h:96
av_cold void ff_fdctdsp_init(FDCTDSPContext *c, AVCodecContext *avctx)
Definition: fdctdsp.c:26
AVCodec.
Definition: codec.h:190
PixblockDSPContext pdsp
Definition: asv.h:48
Macro definitions for various function/variable attributes.
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
int ff_alloc_packet2(AVCodecContext *avctx, AVPacket *avpkt, int64_t size, int64_t min_size)
Check AVPacket size and/or allocate data.
Definition: encode.c:33
#define FF_CODEC_CAP_INIT_THREADSAFE
The codec does not modify any global variables in the init function, allowing to call the init functi...
Definition: internal.h:40
The exact code depends on how similar the blocks are and how related they are to the block
uint8_t
#define av_cold
Definition: attributes.h:88
AVFrame * av_frame_alloc(void)
Allocate an AVFrame and set its fields to default values.
Definition: frame.c:190
#define av_assert2(cond)
assert() equivalent, that does lie in speed critical code.
Definition: avassert.h:64
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:632
const uint8_t ff_asv_ccp_tab[17][2]
Definition: asv.c:43
const uint16_t ff_aanscales[64]
Definition: aandcttab.c:26
uint8_t * data
Definition: packet.h:363
const uint8_t ff_asv_dc_ccp_tab[8][2]
Definition: asv.c:55
ptrdiff_t size
Definition: opengl_enc.c:100
int mb_height2
Definition: asv.h:56
#define AV_CODEC_FLAG_GRAY
Only decode/encode grayscale.
Definition: avcodec.h:308
#define AV_INPUT_BUFFER_MIN_SIZE
minimum encoding buffer size Used to avoid some checks during header writing.
Definition: avcodec.h:222
#define FFALIGN(x, a)
Definition: macros.h:48
#define av_log(a,...)
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
Definition: packet.h:401
int width
Definition: frame.h:372
static uint8_t * put_bits_ptr(PutBitContext *s)
Return the pointer to the byte where the bitstream writer will put the next bit.
Definition: put_bits.h:349
BswapDSPContext bbdsp
Definition: asv.h:45
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:203
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:611
uint8_t * buf
Definition: put_bits.h:54
static int encode_mb(ASV1Context *a, int16_t block[6][64])
Definition: asvenc.c:166
const char * name
Name of the codec implementation.
Definition: codec.h:197
GLsizei count
Definition: opengl_enc.c:108
av_cold void ff_pixblockdsp_init(PixblockDSPContext *c, AVCodecContext *avctx)
Definition: pixblockdsp.c:81
ASUS V1/V2 encoder/decoder common data.
int av_frame_copy(AVFrame *dst, const AVFrame *src)
Copy the frame data from src to dst.
Definition: frame.c:799
int flags
A combination of AV_PKT_FLAG values.
Definition: packet.h:369
static int put_bits_count(PutBitContext *s)
Definition: put_bits.h:83
static void flush_put_bits_le(PutBitContext *s)
Definition: put_bits.h:138
static void put_bits_le(PutBitContext *s, int n, BitBuf value)
Definition: put_bits.h:232
uint8_t w
Definition: llviddspenc.c:38
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 av_cold int encode_init(AVCodecContext *avctx)
Definition: asvenc.c:307
AVCodec ff_asv1_encoder
void(* fdct)(int16_t *block)
Definition: fdctdsp.h:27
AVCodec ff_asv2_encoder
int mb_width
Definition: asv.h:53
static void asv1_encode_block(ASV1Context *a, int16_t block[64])
Definition: asvenc.c:65
int format
format of the frame, -1 if unknown or unset Values correspond to enum AVPixelFormat for video frames...
Definition: frame.h:387
Libavcodec external API header.
enum AVCodecID codec_id
Definition: avcodec.h:541
#define MAX_MB_SIZE
Definition: asvenc.c:164
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:345
main external API structure.
Definition: avcodec.h:531
PutBitContext pb
Definition: asv.h:49
int q_intra_matrix[64]
Definition: asv.h:59
MPEG-1/2 tables.
uint8_t * buf_end
Definition: put_bits.h:54
static void asv1_put_level(PutBitContext *pb, int level)
Definition: asvenc.c:37
int extradata_size
Definition: avcodec.h:633
FDCTDSPContext fdsp
Definition: asv.h:46
static void dct_get(ASV1Context *a, const AVFrame *frame, int mb_x, int mb_y)
Definition: asvenc.c:183
int index
Definition: gxfenc.c:89
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
static enum AVPixelFormat pix_fmts[]
Definition: libkvazaar.c:300
int av_frame_get_buffer(AVFrame *frame, int align)
Allocate new buffer(s) for audio or video data.
Definition: frame.c:337
int global_quality
Global quality for codecs which cannot change it per frame.
Definition: avcodec.h:597
void(* get_pixels)(int16_t *av_restrict block, const uint8_t *pixels, ptrdiff_t stride)
Definition: pixblockdsp.h:29
AAN (Arai, Agui and Nakajima) (I)DCT tables.
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:328
uint8_t level
Definition: svq3.c:205
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 void flush_put_bits(PutBitContext *s)
Pad the end of the output stream with zeros.
Definition: put_bits.h:117
#define AV_WN32(p, v)
Definition: intreadwrite.h:376
static void asv2_encode_block(ASV1Context *a, int16_t block[64])
Definition: asvenc.c:111
static void init_put_bits(PutBitContext *s, uint8_t *buffer, int buffer_size)
Initialize the PutBitContext s.
Definition: put_bits.h:64
void * priv_data
Definition: avcodec.h:558
int height
Definition: frame.h:372
static void asv2_put_level(ASV1Context *a, PutBitContext *pb, int level)
Definition: asvenc.c:49
const uint8_t ff_asv_scantab[64]
Definition: asv.c:32
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
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_RL32
Definition: bytestream.h:91
AVPixelFormat
Pixel format.
Definition: pixfmt.h:64
This structure stores compressed data.
Definition: packet.h:340
int mb_height
Definition: asv.h:54
for(j=16;j >0;--j)
int i
Definition: input.c:407
#define AV_CEIL_RSHIFT(a, b)
Definition: common.h:58