FFmpeg: libavcodec/asvdec.c Source File

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 "mathops.h"
35 #include "mpeg12data.h"
36 
37  #define VLC_BITS 6
38  #define ASV2_LEVEL_VLC_BITS 10
39 
40  static VLC ccp_vlc;
41  static VLC level_vlc;
42  static VLC dc_ccp_vlc;
43  static VLC ac_ccp_vlc;
44  static VLC asv2_level_vlc;
45 
46  static av_cold void init_vlcs(ASV1Context *a)
47 {
48  static int done = 0;
49 
50  if (!done) {
51  done = 1;
52 
53  INIT_VLC_STATIC(&ccp_vlc, VLC_BITS, 17,
54  &ff_asv_ccp_tab[0][1], 2, 1,
55  &ff_asv_ccp_tab[0][0], 2, 1, 64);
56  INIT_VLC_STATIC(&dc_ccp_vlc, VLC_BITS, 8,
57  &ff_asv_dc_ccp_tab[0][1], 2, 1,
58  &ff_asv_dc_ccp_tab[0][0], 2, 1, 64);
59  INIT_VLC_STATIC(&ac_ccp_vlc, VLC_BITS, 16,
60  &ff_asv_ac_ccp_tab[0][1], 2, 1,
61  &ff_asv_ac_ccp_tab[0][0], 2, 1, 64);
62  INIT_VLC_STATIC(&level_vlc, VLC_BITS, 7,
63  &ff_asv_level_tab[0][1], 2, 1,
64  &ff_asv_level_tab[0][0], 2, 1, 64);
65  INIT_VLC_STATIC(&asv2_level_vlc, ASV2_LEVEL_VLC_BITS, 63,
66  &ff_asv2_level_tab[0][1], 2, 1,
67  &ff_asv2_level_tab[0][0], 2, 1, 1024);
68  }
69 }
70 
71 // FIXME write a reversed bitstream reader to avoid the double reverse
72  static inline int asv2_get_bits(GetBitContext *gb, int n)
73 {
74  return ff_reverse[get_bits(gb, n) << (8 - n)];
75 }
76 
77  static inline int asv1_get_level(GetBitContext *gb)
78 {
79  int code = get_vlc2(gb, level_vlc.table, VLC_BITS, 1);
80 
81  if (code == 3)
82  return get_sbits(gb, 8);
83  else
84  return code - 3;
85 }
86 
87  static inline int asv2_get_level(GetBitContext *gb)
88 {
89  int code = get_vlc2(gb, asv2_level_vlc.table, ASV2_LEVEL_VLC_BITS, 1);
90 
91  if (code == 31)
92  return (int8_t) asv2_get_bits(gb, 8);
93  else
94  return code - 31;
95 }
96 
97  static inline int asv1_decode_block(ASV1Context *a, int16_t block[64])
98 {
99  int i;
100 
101  block[0] = 8 * get_bits(&a->gb, 8);
102 
103  for (i = 0; i < 11; i++) {
104  const int ccp = get_vlc2(&a->gb, ccp_vlc.table, VLC_BITS, 1);
105 
106  if (ccp) {
107  if (ccp == 16)
108  break;
109  if (ccp < 0 || i >= 10) {
110  av_log(a->avctx, AV_LOG_ERROR, "coded coeff pattern damaged\n");
111  return AVERROR_INVALIDDATA;
112  }
113 
114  if (ccp & 8)
115  block[a->scantable.permutated[4 * i + 0]] = (asv1_get_level(&a->gb) * a->intra_matrix[4 * i + 0]) >> 4;
116  if (ccp & 4)
117  block[a->scantable.permutated[4 * i + 1]] = (asv1_get_level(&a->gb) * a->intra_matrix[4 * i + 1]) >> 4;
118  if (ccp & 2)
119  block[a->scantable.permutated[4 * i + 2]] = (asv1_get_level(&a->gb) * a->intra_matrix[4 * i + 2]) >> 4;
120  if (ccp & 1)
121  block[a->scantable.permutated[4 * i + 3]] = (asv1_get_level(&a->gb) * a->intra_matrix[4 * i + 3]) >> 4;
122  }
123  }
124 
125  return 0;
126 }
127 
128  static inline int asv2_decode_block(ASV1Context *a, int16_t block[64])
129 {
130  int i, count, ccp;
131 
132  count = asv2_get_bits(&a->gb, 4);
133 
134  block[0] = 8 * asv2_get_bits(&a->gb, 8);
135 
136  ccp = get_vlc2(&a->gb, dc_ccp_vlc.table, VLC_BITS, 1);
137  if (ccp) {
138  if (ccp & 4)
139  block[a->scantable.permutated[1]] = (asv2_get_level(&a->gb) * a->intra_matrix[1]) >> 4;
140  if (ccp & 2)
141  block[a->scantable.permutated[2]] = (asv2_get_level(&a->gb) * a->intra_matrix[2]) >> 4;
142  if (ccp & 1)
143  block[a->scantable.permutated[3]] = (asv2_get_level(&a->gb) * a->intra_matrix[3]) >> 4;
144  }
145 
146  for (i = 1; i < count + 1; i++) {
147  const int ccp = get_vlc2(&a->gb, ac_ccp_vlc.table, VLC_BITS, 1);
148 
149  if (ccp) {
150  if (ccp & 8)
151  block[a->scantable.permutated[4 * i + 0]] = (asv2_get_level(&a->gb) * a->intra_matrix[4 * i + 0]) >> 4;
152  if (ccp & 4)
153  block[a->scantable.permutated[4 * i + 1]] = (asv2_get_level(&a->gb) * a->intra_matrix[4 * i + 1]) >> 4;
154  if (ccp & 2)
155  block[a->scantable.permutated[4 * i + 2]] = (asv2_get_level(&a->gb) * a->intra_matrix[4 * i + 2]) >> 4;
156  if (ccp & 1)
157  block[a->scantable.permutated[4 * i + 3]] = (asv2_get_level(&a->gb) * a->intra_matrix[4 * i + 3]) >> 4;
158  }
159  }
160 
161  return 0;
162 }
163 
164  static inline int decode_mb(ASV1Context *a, int16_t block[6][64])
165 {
166  int i, ret;
167 
168  a->bdsp.clear_blocks(block[0]);
169 
170  if (a->avctx->codec_id == AV_CODEC_ID_ASV1) {
171  for (i = 0; i < 6; i++) {
172  if ((ret = asv1_decode_block(a, block[i])) < 0)
173  return ret;
174  }
175  } else {
176  for (i = 0; i < 6; i++) {
177  if ((ret = asv2_decode_block(a, block[i])) < 0)
178  return ret;
179  }
180  }
181  return 0;
182 }
183 
184  static inline void idct_put(ASV1Context *a, AVFrame *frame, int mb_x, int mb_y)
185 {
186  int16_t(*block)[64] = a->block;
187  int linesize = frame->linesize[0];
188 
189  uint8_t *dest_y = frame->data[0] + (mb_y * 16 * linesize) + mb_x * 16;
190  uint8_t *dest_cb = frame->data[1] + (mb_y * 8 * frame->linesize[1]) + mb_x * 8;
191  uint8_t *dest_cr = frame->data[2] + (mb_y * 8 * frame->linesize[2]) + mb_x * 8;
192 
193  a->idsp.idct_put(dest_y, linesize, block[0]);
194  a->idsp.idct_put(dest_y + 8, linesize, block[1]);
195  a->idsp.idct_put(dest_y + 8 * linesize, linesize, block[2]);
196  a->idsp.idct_put(dest_y + 8 * linesize + 8, linesize, block[3]);
197 
198  if (!(a->avctx->flags & AV_CODEC_FLAG_GRAY)) {
199  a->idsp.idct_put(dest_cb, frame->linesize[1], block[4]);
200  a->idsp.idct_put(dest_cr, frame->linesize[2], block[5]);
201  }
202 }
203 
204  static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
205  AVPacket *avpkt)
206 {
207  ASV1Context *const a = avctx->priv_data;
208  const uint8_t *buf = avpkt->data;
209  int buf_size = avpkt->size;
210  AVFrame *const p = data;
211  int mb_x, mb_y, ret;
212 
213  if (buf_size * 8LL < a->mb_height * a->mb_width * 13LL)
214  return AVERROR_INVALIDDATA;
215 
216  if ((ret = ff_get_buffer(avctx, p, 0)) < 0)
217  return ret;
218  p->pict_type = AV_PICTURE_TYPE_I;
219  p->key_frame = 1;
220 
221  av_fast_padded_malloc(&a->bitstream_buffer, &a->bitstream_buffer_size,
222  buf_size);
223  if (!a->bitstream_buffer)
224  return AVERROR(ENOMEM);
225 
226  if (avctx->codec_id == AV_CODEC_ID_ASV1) {
227  a->bbdsp.bswap_buf((uint32_t *) a->bitstream_buffer,
228  (const uint32_t *) buf, buf_size / 4);
229  } else {
230  int i;
231  for (i = 0; i < buf_size; i++)
232  a->bitstream_buffer[i] = ff_reverse[buf[i]];
233  }
234 
235  init_get_bits(&a->gb, a->bitstream_buffer, buf_size * 8);
236 
237  for (mb_y = 0; mb_y < a->mb_height2; mb_y++) {
238  for (mb_x = 0; mb_x < a->mb_width2; mb_x++) {
239  if ((ret = decode_mb(a, a->block)) < 0)
240  return ret;
241 
242  idct_put(a, p, mb_x, mb_y);
243  }
244  }
245 
246  if (a->mb_width2 != a->mb_width) {
247  mb_x = a->mb_width2;
248  for (mb_y = 0; mb_y < a->mb_height2; mb_y++) {
249  if ((ret = decode_mb(a, a->block)) < 0)
250  return ret;
251 
252  idct_put(a, p, mb_x, mb_y);
253  }
254  }
255 
256  if (a->mb_height2 != a->mb_height) {
257  mb_y = a->mb_height2;
258  for (mb_x = 0; mb_x < a->mb_width; mb_x++) {
259  if ((ret = decode_mb(a, a->block)) < 0)
260  return ret;
261 
262  idct_put(a, p, mb_x, mb_y);
263  }
264  }
265 
266  *got_frame = 1;
267 
268  emms_c();
269 
270  return (get_bits_count(&a->gb) + 31) / 32 * 4;
271 }
272 
273  static av_cold int decode_init(AVCodecContext *avctx)
274 {
275  ASV1Context *const a = avctx->priv_data;
276  const int scale = avctx->codec_id == AV_CODEC_ID_ASV1 ? 1 : 2;
277  int i;
278 
279  if (avctx->extradata_size < 1) {
280  av_log(avctx, AV_LOG_WARNING, "No extradata provided\n");
281  }
282 
283  ff_asv_common_init(avctx);
284  ff_blockdsp_init(&a->bdsp, avctx);
285  ff_idctdsp_init(&a->idsp, avctx);
286  init_vlcs(a);
287  ff_init_scantable(a->idsp.idct_permutation, &a->scantable, ff_asv_scantab);
288  avctx->pix_fmt = AV_PIX_FMT_YUV420P;
289 
290  if (avctx->extradata_size < 1 || (a->inv_qscale = avctx->extradata[0]) == 0) {
291  av_log(avctx, AV_LOG_ERROR, "illegal qscale 0\n");
292  if (avctx->codec_id == AV_CODEC_ID_ASV1)
293  a->inv_qscale = 6;
294  else
295  a->inv_qscale = 10;
296  }
297 
298  for (i = 0; i < 64; i++) {
299  int index = ff_asv_scantab[i];
300 
301  a->intra_matrix[i] = 64 * scale * ff_mpeg1_default_intra_matrix[index] /
302  a->inv_qscale;
303  }
304 
305  return 0;
306 }
307 
308  static av_cold int decode_end(AVCodecContext *avctx)
309 {
310  ASV1Context *const a = avctx->priv_data;
311 
312  av_freep(&a->bitstream_buffer);
313  a->bitstream_buffer_size = 0;
314 
315  return 0;
316 }
317 
318 #if CONFIG_ASV1_DECODER
319 AVCodec ff_asv1_decoder = {
320  .name = "asv1",
321  .long_name = NULL_IF_CONFIG_SMALL("ASUS V1"),
322  .type = AVMEDIA_TYPE_VIDEO,
323  .id = AV_CODEC_ID_ASV1,
324  .priv_data_size = sizeof(ASV1Context),
325  .init = decode_init,
326  .close = decode_end,
327  .decode = decode_frame,
328  .capabilities = AV_CODEC_CAP_DR1,
329 };
330 #endif
331 
332 #if CONFIG_ASV2_DECODER
333 AVCodec ff_asv2_decoder = {
334  .name = "asv2",
335  .long_name = NULL_IF_CONFIG_SMALL("ASUS V2"),
336  .type = AVMEDIA_TYPE_VIDEO,
337  .id = AV_CODEC_ID_ASV2,
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
BswapDSPContext::bswap_buf
void(* bswap_buf)(uint32_t *dst, const uint32_t *src, int w)
Definition: bswapdsp.h:25
decode_frame
static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
Definition: asvdec.c:204
AVERROR_INVALIDDATA
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
AV_CODEC_ID_ASV1
Definition: avcodec.h:249
AVFrame
This structure describes decoded (raw) audio or video data.
Definition: frame.h:218
ff_asv_ac_ccp_tab
const uint8_t ff_asv_ac_ccp_tab[16][2]
Definition: asv.c:60
data
ptrdiff_t const GLvoid * data
Definition: opengl_enc.c:101
get_bits
static unsigned int get_bits(GetBitContext *s, int n)
Read 1-25 bits.
Definition: get_bits.h:269
AV_LOG_WARNING
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
mem.h
Memory handling functions.
ASV1Context::block
int16_t block[6][64]
Definition: asv.h:57
init
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:35
INIT_VLC_STATIC
#define INIT_VLC_STATIC(vlc, bits, a, b, c, d, e, f, g, static_size)
Definition: vlc.h:75
ff_reverse
const uint8_t ff_reverse[256]
Definition: reverse.c:23
AVPacket::size
int size
Definition: avcodec.h:1431
ASV1Context::avctx
AVCodecContext * avctx
Definition: asv.h:43
ff_blockdsp_init
av_cold void ff_blockdsp_init(BlockDSPContext *c, AVCodecContext *avctx)
Definition: blockdsp.c:60
ASV1Context::idsp
IDCTDSPContext idsp
Definition: asv.h:47
BlockDSPContext::clear_blocks
void(* clear_blocks)(int16_t *blocks)
Definition: blockdsp.h:37
VLC_BITS
#define VLC_BITS
Definition: asvdec.c:37
AVCodecContext::pix_fmt
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:1727
av_fast_padded_malloc
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:70
ScanTable::permutated
uint8_t permutated[64]
Definition: idctdsp.h:33
asv2_decode_block
static int asv2_decode_block(ASV1Context *a, int16_t block[64])
Definition: asvdec.c:128
ASV1Context::bitstream_buffer_size
unsigned int bitstream_buffer_size
Definition: asv.h:61
AVCodec
AVCodec.
Definition: avcodec.h:3408
get_sbits
static int get_sbits(GetBitContext *s, int n)
Definition: get_bits.h:254
decode
static void decode(AVCodecContext *dec_ctx, AVPacket *pkt, AVFrame *frame, FILE *outfile)
Definition: decode_audio.c:42
attributes.h
Macro definitions for various function/variable attributes.
block
static int16_t block[64]
Definition: dct.c:115
ff_asv2_level_tab
const uint8_t ff_asv2_level_tab[63][2]
Definition: asv.c:67
decode_init
static av_cold int decode_init(AVCodecContext *avctx)
Definition: asvdec.c:273
uint8_t
uint8_t
Definition: audio_convert.c:194
av_cold
#define av_cold
Definition: attributes.h:82
ASV1Context::bitstream_buffer
uint8_t * bitstream_buffer
Definition: asv.h:60
asv2_level_vlc
static VLC asv2_level_vlc
Definition: asvdec.c:44
AVCodecContext::extradata
uint8_t * extradata
some codecs need / can use extradata like Huffman tables.
Definition: avcodec.h:1618
frame
static AVFrame * frame
Definition: demuxing_decoding.c:53
ff_asv_ccp_tab
const uint8_t ff_asv_ccp_tab[17][2]
Definition: asv.c:43
asv2_get_level
static int asv2_get_level(GetBitContext *gb)
Definition: asvdec.c:87
AVPacket::data
uint8_t * data
Definition: avcodec.h:1430
get_bits_count
static int get_bits_count(const GetBitContext *s)
Definition: get_bits.h:200
ff_asv_dc_ccp_tab
const uint8_t ff_asv_dc_ccp_tab[8][2]
Definition: asv.c:55
ASV1Context::mb_height2
int mb_height2
Definition: asv.h:56
AV_CODEC_FLAG_GRAY
#define AV_CODEC_FLAG_GRAY
Only decode/encode grayscale.
Definition: avcodec.h:861
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:28
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
ASV1Context::bbdsp
BswapDSPContext bbdsp
Definition: asv.h:45
AVERROR
#define AVERROR(e)
Definition: error.h:43
ff_asv_common_init
av_cold void ff_asv_common_init(AVCodecContext *avctx)
Definition: asv.c:83
NULL_IF_CONFIG_SMALL
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:186
AVCodecContext::flags
int flags
AV_CODEC_FLAG_*.
Definition: avcodec.h:1598
AVCodec::name
const char * name
Name of the codec implementation.
Definition: avcodec.h:3415
ASV2_LEVEL_VLC_BITS
#define ASV2_LEVEL_VLC_BITS
Definition: asvdec.c:38
ASV1Context::intra_matrix
uint16_t intra_matrix[64]
Definition: asv.h:58
count
GLsizei count
Definition: opengl_enc.c:109
asv.h
ASUS V1/V2 encoder/decoder common data.
VLC
Definition: vlc.h:26
ASV1Context::scantable
ScanTable scantable
Definition: asv.h:51
asv2_get_bits
static int asv2_get_bits(GetBitContext *gb, int n)
Definition: asvdec.c:72
ASV1Context::gb
GetBitContext gb
Definition: asv.h:50
AV_PICTURE_TYPE_I
Intra.
Definition: avutil.h:274
AVFrame::pict_type
enum AVPictureType pict_type
Picture type of the frame.
Definition: frame.h:301
level_vlc
static VLC level_vlc
Definition: asvdec.c:41
decode_mb
static int decode_mb(ASV1Context *a, int16_t block[6][64])
Definition: asvdec.c:164
ccp_vlc
static VLC ccp_vlc
Definition: asvdec.c:40
get_vlc2
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:563
n
int n
Definition: avisynth_c.h:684
IDCTDSPContext::idct_permutation
uint8_t idct_permutation[64]
IDCT input permutation.
Definition: idctdsp.h:96
ASV1Context::mb_width
int mb_width
Definition: asv.h:53
avcodec.h
Libavcodec external API header.
ac_ccp_vlc
static VLC ac_ccp_vlc
Definition: asvdec.c:43
AVCodecContext::codec_id
enum AVCodecID codec_id
Definition: avcodec.h:1528
AVFrame::linesize
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:249
AVCodecContext
main external API structure.
Definition: avcodec.h:1518
dc_ccp_vlc
static VLC dc_ccp_vlc
Definition: asvdec.c:42
mpeg12data.h
MPEG-1/2 tables.
ff_get_buffer
int ff_get_buffer(AVCodecContext *avctx, AVFrame *frame, int flags)
Get a buffer for a frame.
Definition: decode.c:1891
buf
void * buf
Definition: avisynth_c.h:690
AVCodecContext::extradata_size
int extradata_size
Definition: avcodec.h:1619
index
int index
Definition: gxfenc.c:89
init_get_bits
static int init_get_bits(GetBitContext *s, const uint8_t *buffer, int bit_size)
Initialize GetBitContext.
Definition: get_bits.h:433
ff_mpeg1_default_intra_matrix
const uint16_t ff_mpeg1_default_intra_matrix[256]
Definition: mpeg12data.c:30
ASV1Context::mb_width2
int mb_width2
Definition: asv.h:55
idct_put
static void idct_put(ASV1Context *a, AVFrame *frame, int mb_x, int mb_y)
Definition: asvdec.c:184
AVFrame::data
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:232
ASV1Context
Definition: asv.h:42
AV_PIX_FMT_YUV420P
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
Definition: pixfmt.h:62
ASV1Context::inv_qscale
int inv_qscale
Definition: asv.h:52
internal.h
common internal api header.
IDCTDSPContext::idct_put
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
AVCodecContext::priv_data
void * priv_data
Definition: avcodec.h:1545
ff_init_scantable
av_cold void ff_init_scantable(uint8_t *permutation, ScanTable *st, const uint8_t *src_scantable)
Definition: idctdsp.c:29
ff_idctdsp_init
av_cold void ff_idctdsp_init(IDCTDSPContext *c, AVCodecContext *avctx)
Definition: idctdsp.c:238
VLC::table
VLC_TYPE(* table)[2]
code, bits
Definition: vlc.h:28
init_vlcs
static av_cold void init_vlcs(ASV1Context *a)
Definition: asvdec.c:46
AVFrame::key_frame
int key_frame
1 -> keyframe, 0-> not
Definition: frame.h:296
asv1_get_level
static int asv1_get_level(GetBitContext *gb)
Definition: asvdec.c:77
av_freep
#define av_freep(p)
Definition: tableprint_vlc.h:35
AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
asv1_decode_block
static int asv1_decode_block(ASV1Context *a, int16_t block[64])
Definition: asvdec.c:97
ff_asv_scantab
const uint8_t ff_asv_scantab[64]
Definition: asv.c:32
decode_end
static av_cold int decode_end(AVCodecContext *avctx)
Definition: asvdec.c:308
AV_CODEC_ID_ASV2
Definition: avcodec.h:250
ff_asv_level_tab
const uint8_t ff_asv_level_tab[7][2]
Definition: asv.c:51
AVPacket
This structure stores compressed data.
Definition: avcodec.h:1407
AV_CODEC_CAP_DR1
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.
Definition: avcodec.h:959
ff_asv2_decoder
AVCodec ff_asv2_decoder
ASV1Context::mb_height
int mb_height
Definition: asv.h:54
ff_asv1_decoder
AVCodec ff_asv1_decoder
ASV1Context::bdsp
BlockDSPContext bdsp
Definition: asv.h:44
a
a
Definition: h264pred_template.c:468
Generated on Sun May 13 2018 02:03:43 for FFmpeg by   doxygen 1.8.6

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