Libav
dvdec.c
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1 /*
2  * DV decoder
3  * Copyright (c) 2002 Fabrice Bellard
4  * Copyright (c) 2004 Roman Shaposhnik
5  *
6  * 50 Mbps (DVCPRO50) support
7  * Copyright (c) 2006 Daniel Maas <dmaas@maasdigital.com>
8  *
9  * 100 Mbps (DVCPRO HD) support
10  * Initial code by Daniel Maas <dmaas@maasdigital.com> (funded by BBC R&D)
11  * Final code by Roman Shaposhnik
12  *
13  * Many thanks to Dan Dennedy <dan@dennedy.org> for providing wealth
14  * of DV technical info.
15  *
16  * This file is part of Libav.
17  *
18  * Libav is free software; you can redistribute it and/or
19  * modify it under the terms of the GNU Lesser General Public
20  * License as published by the Free Software Foundation; either
21  * version 2.1 of the License, or (at your option) any later version.
22  *
23  * Libav is distributed in the hope that it will be useful,
24  * but WITHOUT ANY WARRANTY; without even the implied warranty of
25  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
26  * Lesser General Public License for more details.
27  *
28  * You should have received a copy of the GNU Lesser General Public
29  * License along with Libav; if not, write to the Free Software
30  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
31  */
32 
38 #include "libavutil/internal.h"
39 #include "libavutil/imgutils.h"
40 #include "libavutil/pixdesc.h"
41 #include "avcodec.h"
42 #include "idctdsp.h"
43 #include "internal.h"
44 #include "get_bits.h"
45 #include "put_bits.h"
46 #include "simple_idct.h"
47 #include "dvdata.h"
48 #include "dv.h"
49 
50 typedef struct BlockInfo {
51  const uint32_t *factor_table;
53  uint8_t pos; /* position in block */
54  void (*idct_put)(uint8_t *dest, int line_size, int16_t *block);
58 } BlockInfo;
59 
60 static const int dv_iweight_bits = 14;
61 
63 {
64  DVVideoContext *s = avctx->priv_data;
65  IDCTDSPContext idsp;
66  int i;
67 
68  ff_idctdsp_init(&idsp, avctx);
69 
70  for (i = 0; i < 64; i++)
71  s->dv_zigzag[0][i] = idsp.idct_permutation[ff_zigzag_direct[i]];
72 
73  memcpy(s->dv_zigzag[1], ff_dv_zigzag248_direct, sizeof(s->dv_zigzag[1]));
74 
75  s->idct_put[0] = idsp.idct_put;
77 
78  return ff_dvvideo_init(avctx);
79 }
80 
81 /* decode AC coefficients */
82 static void dv_decode_ac(GetBitContext *gb, BlockInfo *mb, int16_t *block)
83 {
84  int last_index = gb->size_in_bits;
85  const uint8_t *scan_table = mb->scan_table;
86  const uint32_t *factor_table = mb->factor_table;
87  int pos = mb->pos;
88  int partial_bit_count = mb->partial_bit_count;
89  int level, run, vlc_len, index;
90 
91  OPEN_READER(re, gb);
92  UPDATE_CACHE(re, gb);
93 
94  /* if we must parse a partial VLC, we do it here */
95  if (partial_bit_count > 0) {
96  re_cache = re_cache >> partial_bit_count | mb->partial_bit_buffer;
97  re_index -= partial_bit_count;
98  mb->partial_bit_count = 0;
99  }
100 
101  /* get the AC coefficients until last_index is reached */
102  for (;;) {
103  av_dlog(NULL, "%2d: bits=%04x index=%d\n", pos, SHOW_UBITS(re, gb, 16),
104  re_index);
105  /* our own optimized GET_RL_VLC */
106  index = NEG_USR32(re_cache, TEX_VLC_BITS);
107  vlc_len = ff_dv_rl_vlc[index].len;
108  if (vlc_len < 0) {
109  index = NEG_USR32((unsigned)re_cache << TEX_VLC_BITS, -vlc_len) +
111  vlc_len = TEX_VLC_BITS - vlc_len;
112  }
113  level = ff_dv_rl_vlc[index].level;
114  run = ff_dv_rl_vlc[index].run;
115 
116  /* gotta check if we're still within gb boundaries */
117  if (re_index + vlc_len > last_index) {
118  /* should be < 16 bits otherwise a codeword could have been parsed */
119  mb->partial_bit_count = last_index - re_index;
120  mb->partial_bit_buffer = re_cache & ~(-1u >> mb->partial_bit_count);
121  re_index = last_index;
122  break;
123  }
124  re_index += vlc_len;
125 
126  av_dlog(NULL, "run=%d level=%d\n", run, level);
127  pos += run;
128  if (pos >= 64)
129  break;
130 
131  level = (level * factor_table[pos] + (1 << (dv_iweight_bits - 1))) >> dv_iweight_bits;
132  block[scan_table[pos]] = level;
133 
134  UPDATE_CACHE(re, gb);
135  }
136  CLOSE_READER(re, gb);
137  mb->pos = pos;
138 }
139 
140 static inline void bit_copy(PutBitContext *pb, GetBitContext *gb)
141 {
142  int bits_left = get_bits_left(gb);
143  while (bits_left >= MIN_CACHE_BITS) {
145  bits_left -= MIN_CACHE_BITS;
146  }
147  if (bits_left > 0) {
148  put_bits(pb, bits_left, get_bits(gb, bits_left));
149  }
150 }
151 
152 /* mb_x and mb_y are in units of 8 pixels */
153 static int dv_decode_video_segment(AVCodecContext *avctx, void *arg)
154 {
155  DVVideoContext *s = avctx->priv_data;
156  DVwork_chunk *work_chunk = arg;
157  int quant, dc, dct_mode, class1, j;
158  int mb_index, mb_x, mb_y, last_index;
159  int y_stride, linesize;
160  int16_t *block, *block1;
161  int c_offset;
162  uint8_t *y_ptr;
163  const uint8_t *buf_ptr;
164  PutBitContext pb, vs_pb;
165  GetBitContext gb;
166  BlockInfo mb_data[5 * DV_MAX_BPM], *mb, *mb1;
167  LOCAL_ALIGNED_16(int16_t, sblock, [5*DV_MAX_BPM], [64]);
168  LOCAL_ALIGNED_16(uint8_t, mb_bit_buffer, [ 80 + FF_INPUT_BUFFER_PADDING_SIZE]); /* allow some slack */
169  LOCAL_ALIGNED_16(uint8_t, vs_bit_buffer, [5*80 + FF_INPUT_BUFFER_PADDING_SIZE]); /* allow some slack */
170  const int log2_blocksize = 3;
171  int is_field_mode[5];
172 
173  assert((((int)mb_bit_buffer) & 7) == 0);
174  assert((((int)vs_bit_buffer) & 7) == 0);
175 
176  memset(sblock, 0, 5*DV_MAX_BPM*sizeof(*sblock));
177 
178  /* pass 1: read DC and AC coefficients in blocks */
179  buf_ptr = &s->buf[work_chunk->buf_offset*80];
180  block1 = &sblock[0][0];
181  mb1 = mb_data;
182  init_put_bits(&vs_pb, vs_bit_buffer, 5 * 80);
183  for (mb_index = 0; mb_index < 5; mb_index++, mb1 += s->sys->bpm, block1 += s->sys->bpm * 64) {
184  /* skip header */
185  quant = buf_ptr[3] & 0x0f;
186  buf_ptr += 4;
187  init_put_bits(&pb, mb_bit_buffer, 80);
188  mb = mb1;
189  block = block1;
190  is_field_mode[mb_index] = 0;
191  for (j = 0; j < s->sys->bpm; j++) {
192  last_index = s->sys->block_sizes[j];
193  init_get_bits(&gb, buf_ptr, last_index);
194 
195  /* get the DC */
196  dc = get_sbits(&gb, 9);
197  dct_mode = get_bits1(&gb);
198  class1 = get_bits(&gb, 2);
199  if (DV_PROFILE_IS_HD(s->sys)) {
200  mb->idct_put = s->idct_put[0];
201  mb->scan_table = s->dv_zigzag[0];
202  mb->factor_table = &s->idct_factor[(j >= 4)*4*16*64 + class1*16*64 + quant*64];
203  is_field_mode[mb_index] |= !j && dct_mode;
204  } else {
205  mb->idct_put = s->idct_put[dct_mode && log2_blocksize == 3];
206  mb->scan_table = s->dv_zigzag[dct_mode];
207  mb->factor_table = &s->idct_factor[(class1 == 3)*2*22*64 + dct_mode*22*64 +
208  (quant + ff_dv_quant_offset[class1])*64];
209  }
210  dc = dc << 2;
211  /* convert to unsigned because 128 is not added in the
212  standard IDCT */
213  dc += 1024;
214  block[0] = dc;
215  buf_ptr += last_index >> 3;
216  mb->pos = 0;
217  mb->partial_bit_count = 0;
218 
219  av_dlog(avctx, "MB block: %d, %d ", mb_index, j);
220  dv_decode_ac(&gb, mb, block);
221 
222  /* write the remaining bits in a new buffer only if the
223  block is finished */
224  if (mb->pos >= 64)
225  bit_copy(&pb, &gb);
226 
227  block += 64;
228  mb++;
229  }
230 
231  /* pass 2: we can do it just after */
232  av_dlog(avctx, "***pass 2 size=%d MB#=%d\n", put_bits_count(&pb), mb_index);
233  block = block1;
234  mb = mb1;
235  init_get_bits(&gb, mb_bit_buffer, put_bits_count(&pb));
236  put_bits32(&pb, 0); // padding must be zeroed
237  flush_put_bits(&pb);
238  for (j = 0; j < s->sys->bpm; j++, block += 64, mb++) {
239  if (mb->pos < 64 && get_bits_left(&gb) > 0) {
240  dv_decode_ac(&gb, mb, block);
241  /* if still not finished, no need to parse other blocks */
242  if (mb->pos < 64)
243  break;
244  }
245  }
246  /* all blocks are finished, so the extra bytes can be used at
247  the video segment level */
248  if (j >= s->sys->bpm)
249  bit_copy(&vs_pb, &gb);
250  }
251 
252  /* we need a pass over the whole video segment */
253  av_dlog(avctx, "***pass 3 size=%d\n", put_bits_count(&vs_pb));
254  block = &sblock[0][0];
255  mb = mb_data;
256  init_get_bits(&gb, vs_bit_buffer, put_bits_count(&vs_pb));
257  put_bits32(&vs_pb, 0); // padding must be zeroed
258  flush_put_bits(&vs_pb);
259  for (mb_index = 0; mb_index < 5; mb_index++) {
260  for (j = 0; j < s->sys->bpm; j++) {
261  if (mb->pos < 64) {
262  av_dlog(avctx, "start %d:%d\n", mb_index, j);
263  dv_decode_ac(&gb, mb, block);
264  }
265  if (mb->pos >= 64 && mb->pos < 127)
266  av_log(avctx, AV_LOG_ERROR, "AC EOB marker is absent pos=%d\n", mb->pos);
267  block += 64;
268  mb++;
269  }
270  }
271 
272  /* compute idct and place blocks */
273  block = &sblock[0][0];
274  mb = mb_data;
275  for (mb_index = 0; mb_index < 5; mb_index++) {
276  dv_calculate_mb_xy(s, work_chunk, mb_index, &mb_x, &mb_y);
277 
278  /* idct_put'ting luminance */
279  if ((s->sys->pix_fmt == AV_PIX_FMT_YUV420P) ||
280  (s->sys->pix_fmt == AV_PIX_FMT_YUV411P && mb_x >= (704 / 8)) ||
281  (s->sys->height >= 720 && mb_y != 134)) {
282  y_stride = (s->frame->linesize[0] << ((!is_field_mode[mb_index]) * log2_blocksize));
283  } else {
284  y_stride = (2 << log2_blocksize);
285  }
286  y_ptr = s->frame->data[0] + ((mb_y * s->frame->linesize[0] + mb_x) << log2_blocksize);
287  linesize = s->frame->linesize[0] << is_field_mode[mb_index];
288  mb[0] .idct_put(y_ptr , linesize, block + 0*64);
289  if (s->sys->video_stype == 4) { /* SD 422 */
290  mb[2].idct_put(y_ptr + (1 << log2_blocksize) , linesize, block + 2*64);
291  } else {
292  mb[1].idct_put(y_ptr + (1 << log2_blocksize) , linesize, block + 1*64);
293  mb[2].idct_put(y_ptr + y_stride, linesize, block + 2*64);
294  mb[3].idct_put(y_ptr + (1 << log2_blocksize) + y_stride, linesize, block + 3*64);
295  }
296  mb += 4;
297  block += 4*64;
298 
299  /* idct_put'ting chrominance */
300  c_offset = (((mb_y >> (s->sys->pix_fmt == AV_PIX_FMT_YUV420P)) * s->frame->linesize[1] +
301  (mb_x >> ((s->sys->pix_fmt == AV_PIX_FMT_YUV411P) ? 2 : 1))) << log2_blocksize);
302  for (j = 2; j; j--) {
303  uint8_t *c_ptr = s->frame->data[j] + c_offset;
304  if (s->sys->pix_fmt == AV_PIX_FMT_YUV411P && mb_x >= (704 / 8)) {
305  uint64_t aligned_pixels[64/8];
306  uint8_t *pixels = (uint8_t*)aligned_pixels;
307  uint8_t *c_ptr1, *ptr1;
308  int x, y;
309  mb->idct_put(pixels, 8, block);
310  for (y = 0; y < (1 << log2_blocksize); y++, c_ptr += s->frame->linesize[j], pixels += 8) {
311  ptr1 = pixels + (1 << (log2_blocksize - 1));
312  c_ptr1 = c_ptr + (s->frame->linesize[j] << log2_blocksize);
313  for (x = 0; x < (1 << (log2_blocksize - 1)); x++) {
314  c_ptr[x] = pixels[x];
315  c_ptr1[x] = ptr1[x];
316  }
317  }
318  block += 64; mb++;
319  } else {
320  y_stride = (mb_y == 134) ? (1 << log2_blocksize) :
321  s->frame->linesize[j] << ((!is_field_mode[mb_index]) * log2_blocksize);
322  linesize = s->frame->linesize[j] << is_field_mode[mb_index];
323  (mb++)-> idct_put(c_ptr , linesize, block); block += 64;
324  if (s->sys->bpm == 8) {
325  (mb++)->idct_put(c_ptr + y_stride, linesize, block); block += 64;
326  }
327  }
328  }
329  }
330  return 0;
331 }
332 
333 /* NOTE: exactly one frame must be given (120000 bytes for NTSC,
334  144000 bytes for PAL - or twice those for 50Mbps) */
336  void *data, int *got_frame,
337  AVPacket *avpkt)
338 {
339  uint8_t *buf = avpkt->data;
340  int buf_size = avpkt->size;
341  DVVideoContext *s = avctx->priv_data;
342  const uint8_t* vsc_pack;
343  int apt, is16_9, ret;
344  const AVDVProfile *sys;
345 
346  sys = av_dv_frame_profile(s->sys, buf, buf_size);
347  if (!sys || buf_size < sys->frame_size) {
348  av_log(avctx, AV_LOG_ERROR, "could not find dv frame profile\n");
349  return -1; /* NOTE: we only accept several full frames */
350  }
351 
352  if (sys != s->sys) {
353  ret = ff_dv_init_dynamic_tables(s, sys);
354  if (ret < 0) {
355  av_log(avctx, AV_LOG_ERROR, "Error initializing the work tables.\n");
356  return ret;
357  }
358  s->sys = sys;
359  }
360 
361  s->frame = data;
362  s->frame->key_frame = 1;
364  avctx->pix_fmt = s->sys->pix_fmt;
365  avctx->time_base = s->sys->time_base;
366 
367  ret = ff_set_dimensions(avctx, s->sys->width, s->sys->height);
368  if (ret < 0)
369  return ret;
370 
371  /* Determine the codec's sample_aspect ratio from the packet */
372  vsc_pack = buf + 80*5 + 48 + 5;
373  if ( *vsc_pack == dv_video_control ) {
374  apt = buf[4] & 0x07;
375  is16_9 = (vsc_pack && ((vsc_pack[2] & 0x07) == 0x02 || (!apt && (vsc_pack[2] & 0x07) == 0x07)));
376  ff_set_sar(avctx, s->sys->sar[is16_9]);
377  }
378 
379  if (ff_get_buffer(avctx, s->frame, 0) < 0) {
380  av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
381  return -1;
382  }
383  s->frame->interlaced_frame = 1;
384  s->frame->top_field_first = 0;
385 
386  s->buf = buf;
387  avctx->execute(avctx, dv_decode_video_segment, s->work_chunks, NULL,
388  dv_work_pool_size(s->sys), sizeof(DVwork_chunk));
389 
390  emms_c();
391 
392  /* return image */
393  *got_frame = 1;
394 
395  return s->sys->frame_size;
396 }
397 
399  .name = "dvvideo",
400  .long_name = NULL_IF_CONFIG_SMALL("DV (Digital Video)"),
401  .type = AVMEDIA_TYPE_VIDEO,
402  .id = AV_CODEC_ID_DVVIDEO,
403  .priv_data_size = sizeof(DVVideoContext),
406  .capabilities = CODEC_CAP_DR1 | CODEC_CAP_SLICE_THREADS,
407 };
static void av_unused put_bits32(PutBitContext *s, uint32_t value)
Write exactly 32 bits into a bitstream.
Definition: put_bits.h:182
AVFrame * frame
Definition: dv.h:42
RL_VLC_ELEM ff_dv_rl_vlc[1184]
Definition: dv.c:52
uint32_t idct_factor[2 *4 *16 *64]
Definition: dv.h:53
misc image utilities
static unsigned int get_bits(GetBitContext *s, int n)
Read 1-25 bits.
Definition: get_bits.h:240
const uint8_t * block_sizes
Definition: dv_profile.h:47
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:133
int size
Definition: avcodec.h:974
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:1254
av_dlog(ac->avr,"%d samples - audio_convert: %s to %s (%s)\n", len, av_get_sample_fmt_name(ac->in_fmt), av_get_sample_fmt_name(ac->out_fmt), use_generic?ac->func_descr_generic:ac->func_descr)
uint8_t run
Definition: svq3.c:146
const uint8_t ff_dv_quant_offset[4]
Definition: dvdata.c:70
void(* idct_put)(uint8_t *dest, int line_size, int16_t *block)
Definition: dvdec.c:54
AVCodec.
Definition: avcodec.h:2796
static int get_sbits(GetBitContext *s, int n)
Definition: get_bits.h:226
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented...
Definition: avcodec.h:1175
uint8_t * buf
Definition: dv.h:44
static int decode(MimicContext *ctx, int quality, int num_coeffs, int is_iframe)
Definition: mimic.c:275
static av_cold int dvvideo_decode_init(AVCodecContext *avctx)
Definition: dvdec.c:62
uint8_t
#define av_cold
Definition: attributes.h:66
void(* idct_put[2])(uint8_t *dest, int line_size, int16_t *block)
Definition: dv.h:50
const uint8_t ff_dv_zigzag248_direct[64]
Definition: dvdata.c:33
#define emms_c()
Definition: internal.h:47
void ff_simple_idct248_put(uint8_t *dest, int line_size, int16_t *block)
Definition: simple_idct.c:88
#define CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.
Definition: avcodec.h:684
const char data[16]
Definition: mxf.c:70
uint8_t * data
Definition: avcodec.h:973
int ff_set_sar(AVCodecContext *avctx, AVRational sar)
Check that the provided sample aspect ratio is valid and set it on the codec context.
Definition: utils.c:145
bitstream reader API header.
int interlaced_frame
The content of the picture is interlaced.
Definition: frame.h:320
enum AVPixelFormat pix_fmt
Definition: dv_profile.h:45
AVRational time_base
Definition: dv_profile.h:40
static const uint8_t frame_size[4]
Definition: g723_1_data.h:47
static int get_bits_left(GetBitContext *gb)
Definition: get_bits.h:555
DVwork_chunk work_chunks[4 *12 *27]
Definition: dv.h:52
#define UPDATE_CACHE(name, gb)
Definition: get_bits.h:161
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:123
static void bit_copy(PutBitContext *pb, GetBitContext *gb)
Definition: dvdec.c:140
int shift_offset
Definition: dvdec.c:57
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:150
static int dv_work_pool_size(const AVDVProfile *d)
Definition: dv.h:104
const AVDVProfile * av_dv_frame_profile(const AVDVProfile *sys, const uint8_t *frame, unsigned buf_size)
Get a DV profile for the provided compressed frame.
Definition: dv_profile.c:267
AVCodec ff_dvvideo_decoder
Definition: dvdec.c:398
int frame_size
Definition: dv_profile.h:37
void av_log(void *avcl, int level, const char *fmt,...)
Definition: log.c:169
const char * name
Name of the codec implementation.
Definition: avcodec.h:2803
static void put_bits(PutBitContext *s, int n, unsigned int value)
Write up to 31 bits into a bitstream.
Definition: put_bits.h:134
#define CLOSE_READER(name, gb)
Definition: get_bits.h:141
int8_t len
Definition: get_bits.h:72
static int put_bits_count(PutBitContext *s)
Definition: put_bits.h:67
common internal API header
#define FF_INPUT_BUFFER_PADDING_SIZE
Required number of additionally allocated bytes at the end of the input bitstream for decoding...
Definition: avcodec.h:531
enum AVPictureType pict_type
Picture type of the frame.
Definition: frame.h:196
#define DV_MAX_BPM
maximum number of blocks per macroblock in any DV format
Definition: dv.h:95
#define NEG_USR32(a, s)
Definition: mathops.h:163
int size_in_bits
Definition: get_bits.h:56
#define DV_PROFILE_IS_HD(p)
Definition: dv.h:79
uint32_t partial_bit_buffer
Definition: dvdec.c:56
const uint8_t * scan_table
Definition: dvdec.c:52
uint8_t idct_permutation[64]
IDCT input permutation.
Definition: idctdsp.h:94
#define SHOW_UBITS(name, gb, num)
Definition: get_bits.h:188
void(* idct_put)(uint8_t *dest, int line_size, int16_t *block)
block -> idct -> clip to unsigned 8 bit -> dest.
Definition: idctdsp.h:70
static void idct_put(FourXContext *f, int x, int y)
Definition: 4xm.c:518
static int dvvideo_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
Definition: dvdec.c:335
NULL
Definition: eval.c:55
Libavcodec external API header.
const uint32_t * factor_table
Definition: dvdec.c:51
static int dv_decode_video_segment(AVCodecContext *avctx, void *arg)
Definition: dvdec.c:153
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:153
uint8_t pos
Definition: dvdec.c:53
main external API structure.
Definition: avcodec.h:1050
static void(WINAPI *cond_broadcast)(pthread_cond_t *cond)
int ff_get_buffer(AVCodecContext *avctx, AVFrame *frame, int flags)
Get a buffer for a frame.
Definition: utils.c:612
#define OPEN_READER(name, gb)
Definition: get_bits.h:127
uint8_t dv_zigzag[2][64]
Definition: dv.h:46
static unsigned int get_bits1(GetBitContext *s)
Definition: get_bits.h:271
AVRational sar[2]
Definition: dv_profile.h:44
int index
Definition: gxfenc.c:72
static int init_get_bits(GetBitContext *s, const uint8_t *buffer, int bit_size)
Initialize GetBitContext.
Definition: get_bits.h:375
av_cold int ff_dvvideo_init(AVCodecContext *avctx)
Definition: dv.c:235
const uint8_t ff_zigzag_direct[64]
Definition: mathtables.c:115
int video_stype
Definition: dv_profile.h:36
uint8_t partial_bit_count
Definition: dvdec.c:55
const uint8_t * quant
#define MIN_CACHE_BITS
Definition: get_bits.h:123
static int16_t block1[64]
Definition: dct-test.c:89
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:141
uint8_t level
Definition: svq3.c:147
uint8_t pi<< 24) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_U8, uint8_t,(*(constuint8_t *) pi-0x80)*(1.0f/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_U8, uint8_t,(*(constuint8_t *) pi-0x80)*(1.0/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S16, int16_t,(*(constint16_t *) pi >>8)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S16, int16_t,*(constint16_t *) pi *(1.0f/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S16, int16_t,*(constint16_t *) pi *(1.0/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S32, int32_t,(*(constint32_t *) pi >>24)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S32, int32_t,*(constint32_t *) pi *(1.0f/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S32, int32_t,*(constint32_t *) pi *(1.0/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_FLT, float, av_clip_uint8(lrintf(*(constfloat *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_FLT, float, av_clip_int16(lrintf(*(constfloat *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_FLT, float, av_clipl_int32(llrintf(*(constfloat *) pi *(1U<< 31)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_DBL, double, av_clip_uint8(lrint(*(constdouble *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_DBL, double, av_clip_int16(lrint(*(constdouble *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_DBL, double, av_clipl_int32(llrint(*(constdouble *) pi *(1U<< 31))))#defineSET_CONV_FUNC_GROUP(ofmt, ifmt) staticvoidset_generic_function(AudioConvert *ac){}voidff_audio_convert_free(AudioConvert **ac){if(!*ac) return;ff_dither_free(&(*ac) ->dc);av_freep(ac);}AudioConvert *ff_audio_convert_alloc(AVAudioResampleContext *avr, enumAVSampleFormatout_fmt, enumAVSampleFormatin_fmt, intchannels, intsample_rate, intapply_map){AudioConvert *ac;intin_planar, out_planar;ac=av_mallocz(sizeof(*ac));if(!ac) returnNULL;ac->avr=avr;ac->out_fmt=out_fmt;ac->in_fmt=in_fmt;ac->channels=channels;ac->apply_map=apply_map;if(avr->dither_method!=AV_RESAMPLE_DITHER_NONE &&av_get_packed_sample_fmt(out_fmt)==AV_SAMPLE_FMT_S16 &&av_get_bytes_per_sample(in_fmt)>2){ac->dc=ff_dither_alloc(avr, out_fmt, in_fmt, channels, sample_rate, apply_map);if(!ac->dc){av_free(ac);returnNULL;}returnac;}in_planar=ff_sample_fmt_is_planar(in_fmt, channels);out_planar=ff_sample_fmt_is_planar(out_fmt, channels);if(in_planar==out_planar){ac->func_type=CONV_FUNC_TYPE_FLAT;ac->planes=in_planar?ac->channels:1;}elseif(in_planar) ac->func_type=CONV_FUNC_TYPE_INTERLEAVE;elseac->func_type=CONV_FUNC_TYPE_DEINTERLEAVE;set_generic_function(ac);if(ARCH_AARCH64) ff_audio_convert_init_aarch64(ac);if(ARCH_ARM) ff_audio_convert_init_arm(ac);if(ARCH_X86) ff_audio_convert_init_x86(ac);returnac;}intff_audio_convert(AudioConvert *ac, AudioData *out, AudioData *in){intuse_generic=1;intlen=in->nb_samples;intp;if(ac->dc){av_dlog(ac->avr,"%dsamples-audio_convert:%sto%s(dithered)\n", len, av_get_sample_fmt_name(ac->in_fmt), av_get_sample_fmt_name(ac->out_fmt));returnff_convert_dither(ac-> dc
uint8_t run
Definition: get_bits.h:73
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
Definition: pixfmt.h:65
#define CODEC_CAP_SLICE_THREADS
Codec supports slice-based (or partition-based) multithreading.
Definition: avcodec.h:759
common internal api header.
static void flush_put_bits(PutBitContext *s)
Pad the end of the output stream with zeros.
Definition: put_bits.h:83
#define TEX_VLC_BITS
Definition: dv.h:97
planar YUV 4:1:1, 12bpp, (1 Cr & Cb sample per 4x1 Y samples)
Definition: pixfmt.h:72
Constants for DV codec.
static void init_put_bits(PutBitContext *s, uint8_t *buffer, int buffer_size)
Initialize the PutBitContext s.
Definition: put_bits.h:48
static av_cold int init(AVCodecParserContext *s)
Definition: h264_parser.c:499
int ff_dv_init_dynamic_tables(DVVideoContext *ctx, const AVDVProfile *d)
Definition: dv.c:178
uint16_t buf_offset
Definition: dv.h:36
void * priv_data
Definition: avcodec.h:1092
float re
Definition: fft-test.c:69
int(* execute)(struct AVCodecContext *c, int(*func)(struct AVCodecContext *c2, void *arg), void *arg2, int *ret, int count, int size)
The codec may call this to execute several independent things.
Definition: avcodec.h:2580
av_cold void ff_idctdsp_init(IDCTDSPContext *c, AVCodecContext *avctx)
Definition: idctdsp.c:156
int top_field_first
If the content is interlaced, is top field displayed first.
Definition: frame.h:325
static void dv_calculate_mb_xy(DVVideoContext *s, DVwork_chunk *work_chunk, int m, int *mb_x, int *mb_y)
Definition: dv.h:114
simple idct header.
const AVDVProfile * sys
Definition: dv.h:41
int key_frame
1 -> keyframe, 0-> not
Definition: frame.h:191
int16_t level
Definition: get_bits.h:71
#define LOCAL_ALIGNED_16(t, v,...)
Definition: internal.h:114
static void dv_decode_ac(GetBitContext *gb, BlockInfo *mb, int16_t *block)
Definition: dvdec.c:82
This structure stores compressed data.
Definition: avcodec.h:950
static const int dv_iweight_bits
Definition: dvdec.c:60
bitstream writer API
static int16_t block[64]
Definition: dct-test.c:88