Libav
dnxhddec.c
Go to the documentation of this file.
1 /*
2  * VC3/DNxHD decoder.
3  * Copyright (c) 2007 SmartJog S.A., Baptiste Coudurier <baptiste dot coudurier at smartjog dot com>
4  * Copyright (c) 2011 MirriAd Ltd
5  *
6  * 10 bit support added by MirriAd Ltd, Joseph Artsimovich <joseph@mirriad.com>
7  *
8  * This file is part of Libav.
9  *
10  * Libav is free software; you can redistribute it and/or
11  * modify it under the terms of the GNU Lesser General Public
12  * License as published by the Free Software Foundation; either
13  * version 2.1 of the License, or (at your option) any later version.
14  *
15  * Libav is distributed in the hope that it will be useful,
16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18  * Lesser General Public License for more details.
19  *
20  * You should have received a copy of the GNU Lesser General Public
21  * License along with Libav; if not, write to the Free Software
22  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
23  */
24 
25 #include "libavutil/imgutils.h"
26 #include "libavutil/timer.h"
27 #include "avcodec.h"
28 #include "blockdsp.h"
29 #include "get_bits.h"
30 #include "dnxhddata.h"
31 #include "idctdsp.h"
32 #include "internal.h"
33 #include "thread.h"
34 
35 typedef struct DNXHDContext {
39  int cid;
40  unsigned int width, height;
41  unsigned int mb_width, mb_height;
42  uint32_t mb_scan_index[68]; /* max for 1080p */
43  int cur_field;
45  int last_dc[3];
47  DECLARE_ALIGNED(16, int16_t, blocks)[12][64];
50  int bit_depth; // 8, 10 or 0 if not initialized at all.
51  int is_444;
52  int mbaff;
53  void (*decode_dct_block)(struct DNXHDContext *ctx, int16_t *block,
54  int n, int qscale);
55 } DNXHDContext;
56 
57 #define DNXHD_VLC_BITS 9
58 #define DNXHD_DC_VLC_BITS 7
59 
60 static void dnxhd_decode_dct_block_8(DNXHDContext *ctx, int16_t *block,
61  int n, int qscale);
62 static void dnxhd_decode_dct_block_10(DNXHDContext *ctx, int16_t *block,
63  int n, int qscale);
65  int n, int qscale);
66 
68 {
69  DNXHDContext *ctx = avctx->priv_data;
70 
71  ctx->avctx = avctx;
72  return 0;
73 }
74 
76 {
77  if (cid != ctx->cid) {
78  int index;
79 
80  if ((index = ff_dnxhd_get_cid_table(cid)) < 0) {
81  av_log(ctx->avctx, AV_LOG_ERROR, "unsupported cid %d\n", cid);
82  return AVERROR(ENOSYS);
83  }
85  av_log(ctx->avctx, AV_LOG_VERBOSE, "Profile cid %d.\n", cid);
86 
87  ff_free_vlc(&ctx->ac_vlc);
88  ff_free_vlc(&ctx->dc_vlc);
89  ff_free_vlc(&ctx->run_vlc);
90 
91  init_vlc(&ctx->ac_vlc, DNXHD_VLC_BITS, 257,
92  ctx->cid_table->ac_bits, 1, 1,
93  ctx->cid_table->ac_codes, 2, 2, 0);
94  init_vlc(&ctx->dc_vlc, DNXHD_DC_VLC_BITS, ctx->bit_depth + 4,
95  ctx->cid_table->dc_bits, 1, 1,
96  ctx->cid_table->dc_codes, 1, 1, 0);
97  init_vlc(&ctx->run_vlc, DNXHD_VLC_BITS, 62,
98  ctx->cid_table->run_bits, 1, 1,
99  ctx->cid_table->run_codes, 2, 2, 0);
100 
103  ctx->cid = cid;
104  }
105  return 0;
106 }
107 
109  const uint8_t *buf, int buf_size,
110  int first_field)
111 {
112  static const uint8_t header_prefix[] = { 0x00, 0x00, 0x02, 0x80, 0x01 };
113  static const uint8_t header_prefix444[] = { 0x00, 0x00, 0x02, 0x80, 0x02 };
114  int i, cid, ret;
115  int old_bit_depth = ctx->bit_depth;
116 
117  if (buf_size < 0x280) {
118  av_log(ctx->avctx, AV_LOG_ERROR, "buffer too small (%d < 640).\n",
119  buf_size);
120  return AVERROR_INVALIDDATA;
121  }
122 
123  if (memcmp(buf, header_prefix, 5) && memcmp(buf, header_prefix444, 5)) {
124  av_log(ctx->avctx, AV_LOG_ERROR,
125  "unknown header 0x%02X 0x%02X 0x%02X 0x%02X 0x%02X\n",
126  buf[0], buf[1], buf[2], buf[3], buf[4]);
127  return AVERROR_INVALIDDATA;
128  }
129  if (buf[5] & 2) { /* interlaced */
130  ctx->cur_field = buf[5] & 1;
131  frame->interlaced_frame = 1;
132  frame->top_field_first = first_field ^ ctx->cur_field;
133  av_log(ctx->avctx, AV_LOG_DEBUG,
134  "interlaced %d, cur field %d\n", buf[5] & 3, ctx->cur_field);
135  }
136  ctx->mbaff = buf[0x6] & 32;
137 
138  ctx->height = AV_RB16(buf + 0x18);
139  ctx->width = AV_RB16(buf + 0x1a);
140 
141  ff_dlog(ctx->avctx, "width %d, height %d\n", ctx->width, ctx->height);
142 
143  if (buf[0x21] == 0x58) { /* 10 bit */
144  ctx->bit_depth = ctx->avctx->bits_per_raw_sample = 10;
145 
146  if (buf[0x4] == 0x2) {
149  ctx->is_444 = 1;
150  } else {
153  }
154  } else if (buf[0x21] == 0x38) { /* 8 bit */
155  ctx->bit_depth = ctx->avctx->bits_per_raw_sample = 8;
156 
159  } else {
160  av_log(ctx->avctx, AV_LOG_ERROR, "invalid bit depth value (%d).\n",
161  buf[0x21]);
162  return AVERROR_INVALIDDATA;
163  }
164  if (ctx->bit_depth != old_bit_depth) {
165  ff_blockdsp_init(&ctx->bdsp, ctx->avctx);
166  ff_idctdsp_init(&ctx->idsp, ctx->avctx);
167  }
168 
169  cid = AV_RB32(buf + 0x28);
170  ff_dlog(ctx->avctx, "compression id %d\n", cid);
171 
172  if ((ret = dnxhd_init_vlc(ctx, cid)) < 0)
173  return ret;
174  if (ctx->mbaff && ctx->cid_table->cid != 1260)
176  "Adaptive MB interlace flag in an unsupported profile.\n");
177 
178  // make sure profile size constraints are respected
179  // DNx100 allows 1920->1440 and 1280->960 subsampling
180  if (ctx->width != ctx->cid_table->width) {
183  ctx->width, ctx->cid_table->width, 255);
184  ctx->width = ctx->cid_table->width;
185  }
186 
187  if (buf_size < ctx->cid_table->coding_unit_size) {
188  av_log(ctx->avctx, AV_LOG_ERROR, "incorrect frame size (%d < %d).\n",
189  buf_size, ctx->cid_table->coding_unit_size);
190  return AVERROR_INVALIDDATA;
191  }
192 
193  ctx->mb_width = ctx->width >> 4;
194  ctx->mb_height = buf[0x16d];
195 
196  ff_dlog(ctx->avctx,
197  "mb width %d, mb height %d\n", ctx->mb_width, ctx->mb_height);
198 
199  if ((ctx->height + 15) >> 4 == ctx->mb_height && frame->interlaced_frame)
200  ctx->height <<= 1;
201 
202  if (ctx->mb_height > 68 ||
203  (ctx->mb_height << frame->interlaced_frame) > (ctx->height + 15) >> 4) {
204  av_log(ctx->avctx, AV_LOG_ERROR,
205  "mb height too big: %d\n", ctx->mb_height);
206  return AVERROR_INVALIDDATA;
207  }
208 
209  for (i = 0; i < ctx->mb_height; i++) {
210  ctx->mb_scan_index[i] = AV_RB32(buf + 0x170 + (i << 2));
211  ff_dlog(ctx->avctx, "mb scan index %d\n", ctx->mb_scan_index[i]);
212  if (buf_size < ctx->mb_scan_index[i] + 0x280) {
213  av_log(ctx->avctx, AV_LOG_ERROR,
214  "invalid mb scan index (%d < %d).\n",
215  buf_size, ctx->mb_scan_index[i] + 0x280);
216  return AVERROR_INVALIDDATA;
217  }
218  }
219 
220  return 0;
221 }
222 
224  int16_t *block, int n,
225  int qscale,
226  int index_bits,
227  int level_bias,
228  int level_shift)
229 {
230  int i, j, index1, index2, len;
231  int level, component, sign;
232  const uint8_t *weight_matrix;
233  OPEN_READER(bs, &ctx->gb);
234 
235  if (!ctx->is_444) {
236  if (n & 2) {
237  component = 1 + (n & 1);
238  weight_matrix = ctx->cid_table->chroma_weight;
239  } else {
240  component = 0;
241  weight_matrix = ctx->cid_table->luma_weight;
242  }
243  } else {
244  component = (n >> 1) % 3;
245  if (component) {
246  weight_matrix = ctx->cid_table->chroma_weight;
247  } else {
248  weight_matrix = ctx->cid_table->luma_weight;
249  }
250  }
251 
252  UPDATE_CACHE(bs, &ctx->gb);
253  GET_VLC(len, bs, &ctx->gb, ctx->dc_vlc.table, DNXHD_DC_VLC_BITS, 1);
254  if (len) {
255  level = GET_CACHE(bs, &ctx->gb);
256  LAST_SKIP_BITS(bs, &ctx->gb, len);
257  sign = ~level >> 31;
258  level = (NEG_USR32(sign ^ level, len) ^ sign) - sign;
259  ctx->last_dc[component] += level;
260  }
261  block[0] = ctx->last_dc[component];
262 
263  for (i = 1; ; i++) {
264  UPDATE_CACHE(bs, &ctx->gb);
265  GET_VLC(index1, bs, &ctx->gb, ctx->ac_vlc.table,
266  DNXHD_VLC_BITS, 2);
267  level = ctx->cid_table->ac_level[index1];
268  if (!level) /* EOB */
269  break;
270 
271  sign = SHOW_SBITS(bs, &ctx->gb, 1);
272  SKIP_BITS(bs, &ctx->gb, 1);
273 
274  if (ctx->cid_table->ac_index_flag[index1]) {
275  level += SHOW_UBITS(bs, &ctx->gb, index_bits) << 6;
276  SKIP_BITS(bs, &ctx->gb, index_bits);
277  }
278 
279  if (ctx->cid_table->ac_run_flag[index1]) {
280  UPDATE_CACHE(bs, &ctx->gb);
281  GET_VLC(index2, bs, &ctx->gb, ctx->run_vlc.table,
282  DNXHD_VLC_BITS, 2);
283  i += ctx->cid_table->run[index2];
284  }
285 
286  if (i > 63) {
287  av_log(ctx->avctx, AV_LOG_ERROR, "ac tex damaged %d, %d\n", n, i);
288  break;
289  }
290 
291  j = ctx->scantable.permutated[i];
292  level = (2 * level + 1) * qscale * weight_matrix[i];
293  if (level_bias < 32 || weight_matrix[i] != level_bias)
294  level += level_bias;
295  level >>= level_shift;
296 
297  block[j] = (level ^ sign) - sign;
298  }
299 
300  CLOSE_READER(bs, &ctx->gb);
301 }
302 
304  int n, int qscale)
305 {
306  dnxhd_decode_dct_block(ctx, block, n, qscale, 4, 32, 6);
307 }
308 
310  int n, int qscale)
311 {
312  dnxhd_decode_dct_block(ctx, block, n, qscale, 6, 8, 4);
313 }
314 
316  int n, int qscale)
317 {
318  dnxhd_decode_dct_block(ctx, block, n, qscale, 6, 32, 6);
319 }
320 
322  int x, int y)
323 {
324  int shift1 = ctx->bit_depth == 10;
325  int dct_linesize_luma = frame->linesize[0];
326  int dct_linesize_chroma = frame->linesize[1];
327  uint8_t *dest_y, *dest_u, *dest_v;
328  int dct_y_offset, dct_x_offset;
329  int qscale, i;
330  int interlaced_mb = 0;
331 
332  if (ctx->mbaff) {
333  interlaced_mb = get_bits1(&ctx->gb);
334  qscale = get_bits(&ctx->gb, 10);
335  } else {
336  qscale = get_bits(&ctx->gb, 11);
337  }
338  skip_bits1(&ctx->gb);
339 
340  for (i = 0; i < 8; i++) {
341  ctx->bdsp.clear_block(ctx->blocks[i]);
342  ctx->decode_dct_block(ctx, ctx->blocks[i], i, qscale);
343  }
344  if (ctx->is_444) {
345  for (; i < 12; i++) {
346  ctx->bdsp.clear_block(ctx->blocks[i]);
347  ctx->decode_dct_block(ctx, ctx->blocks[i], i, qscale);
348  }
349  }
350 
351  if (frame->interlaced_frame) {
352  dct_linesize_luma <<= 1;
353  dct_linesize_chroma <<= 1;
354  }
355 
356  dest_y = frame->data[0] + ((y * dct_linesize_luma) << 4) + (x << (4 + shift1));
357  dest_u = frame->data[1] + ((y * dct_linesize_chroma) << 4) + (x << (3 + shift1 + ctx->is_444));
358  dest_v = frame->data[2] + ((y * dct_linesize_chroma) << 4) + (x << (3 + shift1 + ctx->is_444));
359 
360  if (ctx->cur_field) {
361  dest_y += frame->linesize[0];
362  dest_u += frame->linesize[1];
363  dest_v += frame->linesize[2];
364  }
365  if (interlaced_mb) {
366  dct_linesize_luma <<= 1;
367  dct_linesize_chroma <<= 1;
368  }
369 
370  dct_y_offset = interlaced_mb ? frame->linesize[0] : (dct_linesize_luma << 3);
371  dct_x_offset = 8 << shift1;
372  if (!ctx->is_444) {
373  ctx->idsp.idct_put(dest_y, dct_linesize_luma, ctx->blocks[0]);
374  ctx->idsp.idct_put(dest_y + dct_x_offset, dct_linesize_luma, ctx->blocks[1]);
375  ctx->idsp.idct_put(dest_y + dct_y_offset, dct_linesize_luma, ctx->blocks[4]);
376  ctx->idsp.idct_put(dest_y + dct_y_offset + dct_x_offset, dct_linesize_luma, ctx->blocks[5]);
377 
378  if (!(ctx->avctx->flags & AV_CODEC_FLAG_GRAY)) {
379  dct_y_offset = interlaced_mb ? frame->linesize[1] : (dct_linesize_chroma << 3);
380  ctx->idsp.idct_put(dest_u, dct_linesize_chroma, ctx->blocks[2]);
381  ctx->idsp.idct_put(dest_v, dct_linesize_chroma, ctx->blocks[3]);
382  ctx->idsp.idct_put(dest_u + dct_y_offset, dct_linesize_chroma, ctx->blocks[6]);
383  ctx->idsp.idct_put(dest_v + dct_y_offset, dct_linesize_chroma, ctx->blocks[7]);
384  }
385  } else {
386  ctx->idsp.idct_put(dest_y, dct_linesize_luma, ctx->blocks[0]);
387  ctx->idsp.idct_put(dest_y + dct_x_offset, dct_linesize_luma, ctx->blocks[1]);
388  ctx->idsp.idct_put(dest_y + dct_y_offset, dct_linesize_luma, ctx->blocks[6]);
389  ctx->idsp.idct_put(dest_y + dct_y_offset + dct_x_offset, dct_linesize_luma, ctx->blocks[7]);
390 
391  if (!(ctx->avctx->flags & AV_CODEC_FLAG_GRAY)) {
392  dct_y_offset = interlaced_mb ? frame->linesize[1] : (dct_linesize_chroma << 3);
393  ctx->idsp.idct_put(dest_u, dct_linesize_chroma, ctx->blocks[2]);
394  ctx->idsp.idct_put(dest_u + dct_x_offset, dct_linesize_chroma, ctx->blocks[3]);
395  ctx->idsp.idct_put(dest_u + dct_y_offset, dct_linesize_chroma, ctx->blocks[8]);
396  ctx->idsp.idct_put(dest_u + dct_y_offset + dct_x_offset, dct_linesize_chroma, ctx->blocks[9]);
397  ctx->idsp.idct_put(dest_v, dct_linesize_chroma, ctx->blocks[4]);
398  ctx->idsp.idct_put(dest_v + dct_x_offset, dct_linesize_chroma, ctx->blocks[5]);
399  ctx->idsp.idct_put(dest_v + dct_y_offset, dct_linesize_chroma, ctx->blocks[10]);
400  ctx->idsp.idct_put(dest_v + dct_y_offset + dct_x_offset, dct_linesize_chroma, ctx->blocks[11]);
401  }
402  }
403 
404  return 0;
405 }
406 
408  const uint8_t *buf, int buf_size)
409 {
410  int x, y;
411  for (y = 0; y < ctx->mb_height; y++) {
412  ctx->last_dc[0] =
413  ctx->last_dc[1] =
414  ctx->last_dc[2] = 1 << (ctx->bit_depth + 2); // for levels +2^(bitdepth-1)
415  init_get_bits(&ctx->gb, buf + ctx->mb_scan_index[y], (buf_size - ctx->mb_scan_index[y]) << 3);
416  for (x = 0; x < ctx->mb_width; x++) {
417  //START_TIMER;
418  dnxhd_decode_macroblock(ctx, frame, x, y);
419  //STOP_TIMER("decode macroblock");
420  }
421  }
422  return 0;
423 }
424 
426  int *got_frame, AVPacket *avpkt)
427 {
428  const uint8_t *buf = avpkt->data;
429  int buf_size = avpkt->size;
430  DNXHDContext *ctx = avctx->priv_data;
431  ThreadFrame tf;
432  int first_field = 1;
433  int ret;
434 
435  tf.f = data;
436 
437  ff_dlog(avctx, "frame size %d\n", buf_size);
438 
439 decode_coding_unit:
440  if ((ret = dnxhd_decode_header(ctx, tf.f, buf, buf_size, first_field)) < 0)
441  return ret;
442 
443  if ((avctx->width || avctx->height) &&
444  (ctx->width != avctx->width || ctx->height != avctx->height)) {
445  av_log(avctx, AV_LOG_WARNING, "frame size changed: %dx%d -> %dx%d\n",
446  avctx->width, avctx->height, ctx->width, ctx->height);
447  first_field = 1;
448  }
449 
450  ret = ff_set_dimensions(avctx, ctx->width, ctx->height);
451  if (ret < 0)
452  return ret;
453 
454  if (first_field) {
455  if ((ret = ff_thread_get_buffer(avctx, &tf, 0)) < 0) {
456  av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
457  return ret;
458  }
460  tf.f->key_frame = 1;
461  }
462 
463  dnxhd_decode_macroblocks(ctx, tf.f, buf + 0x280, buf_size - 0x280);
464 
465  if (first_field && tf.f->interlaced_frame) {
466  buf += ctx->cid_table->coding_unit_size;
467  buf_size -= ctx->cid_table->coding_unit_size;
468  first_field = 0;
469  goto decode_coding_unit;
470  }
471 
472  *got_frame = 1;
473  return buf_size;
474 }
475 
477 {
478  DNXHDContext *ctx = avctx->priv_data;
479 
480  ff_free_vlc(&ctx->ac_vlc);
481  ff_free_vlc(&ctx->dc_vlc);
482  ff_free_vlc(&ctx->run_vlc);
483  return 0;
484 }
485 
487  .name = "dnxhd",
488  .long_name = NULL_IF_CONFIG_SMALL("VC3/DNxHD"),
489  .type = AVMEDIA_TYPE_VIDEO,
490  .id = AV_CODEC_ID_DNXHD,
491  .priv_data_size = sizeof(DNXHDContext),
493  .close = dnxhd_decode_close,
496 };
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:54
This structure describes decoded (raw) audio or video data.
Definition: frame.h:140
const uint8_t * ac_level
Definition: dnxhddata.h:39
const uint8_t * dc_bits
Definition: dnxhddata.h:37
IDCTDSPContext idsp
Definition: dnxhddec.c:46
misc image utilities
static unsigned int get_bits(GetBitContext *s, int n)
Read 1-25 bits.
Definition: get_bits.h:228
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:130
const uint8_t * luma_weight
Definition: dnxhddata.h:36
AVFrame * f
Definition: thread.h:36
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:134
void(* clear_block)(int16_t *block)
Definition: blockdsp.h:35
int last_dc[3]
Definition: dnxhddec.c:45
Scantable.
Definition: idctdsp.h:29
int num
numerator
Definition: rational.h:44
int size
Definition: avcodec.h:1347
av_log(ac->avr, AV_LOG_TRACE, "%d samples - audio_convert: %s to %s (%s)\, 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)
const CIDEntry ff_dnxhd_cid_table[]
Definition: dnxhddata.c:1077
const uint16_t * run_codes
Definition: dnxhddata.h:41
#define DECLARE_ALIGNED(n, t, v)
Definition: mem.h:58
AVRational sample_aspect_ratio
sample aspect ratio (0 if unknown) That is the width of a pixel divided by the height of the pixel...
Definition: avcodec.h:1804
VLC run_vlc
Definition: dnxhddec.c:44
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:1621
uint8_t permutated[64]
Definition: idctdsp.h:31
int bits_per_raw_sample
Bits per sample/pixel of internal libavcodec pixel/sample format.
Definition: avcodec.h:2776
#define init_vlc(vlc, nb_bits, nb_codes, bits, bits_wrap, bits_size, codes, codes_wrap, codes_size, flags)
Definition: vlc.h:38
VLC dc_vlc
Definition: dnxhddec.c:44
AVCodec.
Definition: avcodec.h:3120
static int16_t block[64]
Definition: dct.c:97
static av_cold int dnxhd_decode_close(AVCodecContext *avctx)
Definition: dnxhddec.c:476
uint8_t
#define av_cold
Definition: attributes.h:66
#define AV_RB32
Definition: intreadwrite.h:130
Multithreading support functions.
void(* decode_dct_block)(struct DNXHDContext *ctx, int16_t *block, int n, int qscale)
Definition: dnxhddec.c:53
const char data[16]
Definition: mxf.c:70
uint8_t * data
Definition: avcodec.h:1346
const uint8_t * run_bits
Definition: dnxhddata.h:42
bitstream reader API header.
int bit_depth
Definition: dnxhddec.c:50
#define AV_LOG_VERBOSE
Detailed information.
Definition: log.h:140
#define DNXHD_VLC_BITS
Definition: dnxhddec.c:57
int interlaced_frame
The content of the picture is interlaced.
Definition: frame.h:263
unsigned int coding_unit_size
Definition: dnxhddata.h:33
#define DNXHD_DC_VLC_BITS
Definition: dnxhddec.c:58
#define AV_CODEC_FLAG_GRAY
Only decode/encode grayscale.
Definition: avcodec.h:763
high precision timer, useful to profile code
const uint8_t * ac_index_flag
Definition: dnxhddata.h:40
VLC ac_vlc
Definition: dnxhddec.c:44
const uint8_t * ac_bits
Definition: dnxhddata.h:39
const uint16_t * ac_codes
Definition: dnxhddata.h:38
#define UPDATE_CACHE(name, gb)
Definition: get_bits.h:149
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:124
int ff_dnxhd_get_cid_table(int cid)
Definition: dnxhddata.c:1178
unsigned int width
Definition: dnxhddata.h:30
static const int shift1[6]
Definition: dxa.c:48
#define AV_RB16
Definition: intreadwrite.h:53
#define AVERROR(e)
Definition: error.h:43
uint32_t mb_scan_index[68]
Definition: dnxhddec.c:42
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:148
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:145
int flags
AV_CODEC_FLAG_*.
Definition: avcodec.h:1503
unsigned int height
Definition: dnxhddec.c:40
const uint8_t * dc_codes
Definition: dnxhddata.h:37
const char * name
Name of the codec implementation.
Definition: avcodec.h:3127
#define AV_PIX_FMT_YUV444P10
Definition: pixfmt.h:265
#define CLOSE_READER(name, gb)
Definition: get_bits.h:129
#define AV_CODEC_CAP_FRAME_THREADS
Codec supports frame-level multithreading.
Definition: avcodec.h:893
Definition: vlc.h:26
planar YUV 4:2:2, 16bpp, (1 Cr & Cb sample per 2x1 Y samples)
Definition: pixfmt.h:63
const uint8_t * chroma_weight
Definition: dnxhddata.h:36
#define SKIP_BITS(name, gb, num)
Definition: get_bits.h:164
int av_reduce(int *dst_num, int *dst_den, int64_t num, int64_t den, int64_t max)
Reduce a fraction.
Definition: rational.c:35
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 av_always_inline void dnxhd_decode_dct_block(DNXHDContext *ctx, int16_t *block, int n, int qscale, int index_bits, int level_bias, int level_shift)
Definition: dnxhddec.c:223
enum AVPictureType pict_type
Picture type of the frame.
Definition: frame.h:201
int width
picture width / height.
Definition: avcodec.h:1580
#define NEG_USR32(a, s)
Definition: mathops.h:154
static int decode(AVCodecContext *avctx, AVFrame *frame, int *got_frame, AVPacket *pkt)
Definition: avconv.c:1288
const uint8_t * run
Definition: dnxhddata.h:42
AVFormatContext * ctx
Definition: movenc.c:48
static void dnxhd_decode_dct_block_10(DNXHDContext *ctx, int16_t *block, int n, int qscale)
Definition: dnxhddec.c:309
#define LAST_SKIP_BITS(name, gb, num)
Definition: get_bits.h:170
ScanTable scantable
Definition: dnxhddec.c:48
unsigned int mb_width
Definition: dnxhddec.c:41
#define GET_VLC(code, name, gb, table, bits, max_depth)
If the vlc code is invalid and max_depth=1, then no bits will be removed.
Definition: get_bits.h:416
uint8_t idct_permutation[64]
IDCT input permutation.
Definition: idctdsp.h:94
#define SHOW_UBITS(name, gb, num)
Definition: get_bits.h:176
static int dnxhd_decode_macroblocks(DNXHDContext *ctx, AVFrame *frame, const uint8_t *buf, int buf_size)
Definition: dnxhddec.c:407
int cid
compression id
Definition: dnxhddec.c:39
unsigned int width
Definition: dnxhddec.c:40
Libavcodec external API header.
#define ff_dlog(ctx,...)
Definition: internal.h:60
int cur_field
current interlaced field
Definition: dnxhddec.c:43
unsigned int mb_height
Definition: dnxhddec.c:41
av_cold void ff_blockdsp_init(BlockDSPContext *c, AVCodecContext *avctx)
Definition: blockdsp.c:58
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:158
static int dnxhd_init_vlc(DNXHDContext *ctx, int cid)
Definition: dnxhddec.c:75
const uint8_t * ac_run_flag
Definition: dnxhddata.h:40
int ff_thread_get_buffer(AVCodecContext *avctx, ThreadFrame *f, int flags)
Wrapper around get_buffer() for frame-multithreaded codecs.
main external API structure.
Definition: avcodec.h:1409
static void(WINAPI *cond_broadcast)(pthread_cond_t *cond)
#define OPEN_READER(name, gb)
Definition: get_bits.h:118
static void dnxhd_decode_dct_block_10_444(DNXHDContext *ctx, int16_t *block, int n, int qscale)
Definition: dnxhddec.c:315
static unsigned int get_bits1(GetBitContext *s)
Definition: get_bits.h:267
static void skip_bits1(GetBitContext *s)
Definition: get_bits.h:292
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:362
#define GET_CACHE(name, gb)
Definition: get_bits.h:180
const uint8_t ff_zigzag_direct[64]
Definition: mathtables.c:115
int is_444
Definition: dnxhddec.c:51
#define AV_PIX_FMT_YUV422P10
Definition: pixfmt.h:264
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:146
uint8_t level
Definition: svq3.c:204
static void dnxhd_decode_dct_block_8(DNXHDContext *ctx, int16_t *block, int n, int qscale)
Definition: dnxhddec.c:303
#define SHOW_SBITS(name, gb, num)
Definition: get_bits.h:177
common internal api header.
GetBitContext gb
Definition: dnxhddec.c:37
int den
denominator
Definition: rational.h:45
static av_cold int init(AVCodecParserContext *s)
Definition: h264_parser.c:582
void * priv_data
Definition: avcodec.h:1451
static int dnxhd_decode_macroblock(DNXHDContext *ctx, AVFrame *frame, int x, int y)
Definition: dnxhddec.c:321
av_cold void ff_init_scantable(uint8_t *permutation, ScanTable *st, const uint8_t *src_scantable)
Definition: idctdsp.c:28
av_cold void ff_idctdsp_init(IDCTDSPContext *c, AVCodecContext *avctx)
Definition: idctdsp.c:147
int top_field_first
If the content is interlaced, is top field displayed first.
Definition: frame.h:268
static int dnxhd_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
Definition: dnxhddec.c:425
int len
VLC_TYPE(* table)[2]
code, bits
Definition: vlc.h:28
AVCodecContext * avctx
Definition: dnxhddec.c:36
int key_frame
1 -> keyframe, 0-> not
Definition: frame.h:196
BlockDSPContext bdsp
Definition: dnxhddec.c:38
AVCodec ff_dnxhd_decoder
Definition: dnxhddec.c:486
const CIDEntry * cid_table
Definition: dnxhddec.c:49
#define av_always_inline
Definition: attributes.h:40
int cid
Definition: dnxhddata.h:29
static int dnxhd_decode_header(DNXHDContext *ctx, AVFrame *frame, const uint8_t *buf, int buf_size, int first_field)
Definition: dnxhddec.c:108
static int first_field(int fd)
Definition: v4l2.c:218
This structure stores compressed data.
Definition: avcodec.h:1323
void ff_free_vlc(VLC *vlc)
Definition: bitstream.c:334
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.
Definition: avcodec.h:838
static av_cold int dnxhd_decode_init(AVCodecContext *avctx)
Definition: dnxhddec.c:67
int16_t blocks[12][64]
Definition: dnxhddec.c:47