Libav
dnxhddec.c
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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 
34 typedef struct DNXHDContext {
38  int cid;
39  unsigned int width, height;
40  unsigned int mb_width, mb_height;
41  uint32_t mb_scan_index[68]; /* max for 1080p */
42  int cur_field;
44  int last_dc[3];
46  DECLARE_ALIGNED(16, int16_t, blocks)[12][64];
49  int bit_depth; // 8, 10 or 0 if not initialized at all.
50  int is_444;
51  void (*decode_dct_block)(struct DNXHDContext *ctx, int16_t *block,
52  int n, int qscale);
53 } DNXHDContext;
54 
55 #define DNXHD_VLC_BITS 9
56 #define DNXHD_DC_VLC_BITS 7
57 
58 static void dnxhd_decode_dct_block_8(DNXHDContext *ctx, int16_t *block,
59  int n, int qscale);
60 static void dnxhd_decode_dct_block_10(DNXHDContext *ctx, int16_t *block,
61  int n, int qscale);
62 static void dnxhd_decode_dct_block_10_444(DNXHDContext *ctx, int16_t *block,
63  int n, int qscale);
64 
66 {
67  DNXHDContext *ctx = avctx->priv_data;
68 
69  ctx->avctx = avctx;
70  return 0;
71 }
72 
73 static int dnxhd_init_vlc(DNXHDContext *ctx, int cid)
74 {
75  if (cid != ctx->cid) {
76  int index;
77 
78  if ((index = ff_dnxhd_get_cid_table(cid)) < 0) {
79  av_log(ctx->avctx, AV_LOG_ERROR, "unsupported cid %d\n", cid);
80  return AVERROR(ENOSYS);
81  }
83 
84  ff_free_vlc(&ctx->ac_vlc);
85  ff_free_vlc(&ctx->dc_vlc);
86  ff_free_vlc(&ctx->run_vlc);
87 
88  init_vlc(&ctx->ac_vlc, DNXHD_VLC_BITS, 257,
89  ctx->cid_table->ac_bits, 1, 1,
90  ctx->cid_table->ac_codes, 2, 2, 0);
91  init_vlc(&ctx->dc_vlc, DNXHD_DC_VLC_BITS, ctx->bit_depth + 4,
92  ctx->cid_table->dc_bits, 1, 1,
93  ctx->cid_table->dc_codes, 1, 1, 0);
94  init_vlc(&ctx->run_vlc, DNXHD_VLC_BITS, 62,
95  ctx->cid_table->run_bits, 1, 1,
96  ctx->cid_table->run_codes, 2, 2, 0);
97 
100  ctx->cid = cid;
101  }
102  return 0;
103 }
104 
105 static int dnxhd_decode_header(DNXHDContext *ctx, AVFrame *frame,
106  const uint8_t *buf, int buf_size,
107  int first_field)
108 {
109  static const uint8_t header_prefix[] = { 0x00, 0x00, 0x02, 0x80, 0x01 };
110  static const uint8_t header_prefix444[] = { 0x00, 0x00, 0x02, 0x80, 0x02 };
111  int i, cid, ret;
112 
113  if (buf_size < 0x280)
114  return AVERROR_INVALIDDATA;
115 
116  if (memcmp(buf, header_prefix, 5) && memcmp(buf, header_prefix444, 5)) {
117  av_log(ctx->avctx, AV_LOG_ERROR, "error in header\n");
118  return AVERROR_INVALIDDATA;
119  }
120  if (buf[5] & 2) { /* interlaced */
121  ctx->cur_field = buf[5] & 1;
122  frame->interlaced_frame = 1;
123  frame->top_field_first = first_field ^ ctx->cur_field;
124  av_log(ctx->avctx, AV_LOG_DEBUG,
125  "interlaced %d, cur field %d\n", buf[5] & 3, ctx->cur_field);
126  }
127 
128  ctx->height = AV_RB16(buf + 0x18);
129  ctx->width = AV_RB16(buf + 0x1a);
130 
131  av_dlog(ctx->avctx, "width %d, height %d\n", ctx->width, ctx->height);
132 
133  ctx->is_444 = 0;
134  if (buf[0x4] == 0x2) {
136  ctx->avctx->bits_per_raw_sample = 10;
137  if (ctx->bit_depth != 10) {
138  ff_blockdsp_init(&ctx->bdsp, ctx->avctx);
139  ff_idctdsp_init(&ctx->idsp, ctx->avctx);
140  ctx->bit_depth = 10;
142  }
143  ctx->is_444 = 1;
144  } else if (buf[0x21] & 0x40) {
146  ctx->avctx->bits_per_raw_sample = 10;
147  if (ctx->bit_depth != 10) {
148  ff_blockdsp_init(&ctx->bdsp, ctx->avctx);
149  ff_idctdsp_init(&ctx->idsp, ctx->avctx);
150  ctx->bit_depth = 10;
152  }
153  } else {
155  ctx->avctx->bits_per_raw_sample = 8;
156  if (ctx->bit_depth != 8) {
157  ff_blockdsp_init(&ctx->bdsp, ctx->avctx);
158  ff_idctdsp_init(&ctx->idsp, ctx->avctx);
159  ctx->bit_depth = 8;
161  }
162  }
163 
164  cid = AV_RB32(buf + 0x28);
165  av_dlog(ctx->avctx, "compression id %d\n", cid);
166 
167  if ((ret = dnxhd_init_vlc(ctx, cid)) < 0)
168  return ret;
169 
170  if (buf_size < ctx->cid_table->coding_unit_size) {
171  av_log(ctx->avctx, AV_LOG_ERROR, "incorrect frame size\n");
172  return AVERROR_INVALIDDATA;
173  }
174 
175  ctx->mb_width = ctx->width >> 4;
176  ctx->mb_height = buf[0x16d];
177 
178  av_dlog(ctx->avctx,
179  "mb width %d, mb height %d\n", ctx->mb_width, ctx->mb_height);
180 
181  if ((ctx->height + 15) >> 4 == ctx->mb_height && frame->interlaced_frame)
182  ctx->height <<= 1;
183 
184  if (ctx->mb_height > 68 ||
185  (ctx->mb_height << frame->interlaced_frame) > (ctx->height + 15) >> 4) {
186  av_log(ctx->avctx, AV_LOG_ERROR,
187  "mb height too big: %d\n", ctx->mb_height);
188  return AVERROR_INVALIDDATA;
189  }
190 
191  for (i = 0; i < ctx->mb_height; i++) {
192  ctx->mb_scan_index[i] = AV_RB32(buf + 0x170 + (i << 2));
193  av_dlog(ctx->avctx, "mb scan index %d\n", ctx->mb_scan_index[i]);
194  if (buf_size < ctx->mb_scan_index[i] + 0x280) {
195  av_log(ctx->avctx, AV_LOG_ERROR, "invalid mb scan index\n");
196  return AVERROR_INVALIDDATA;
197  }
198  }
199 
200  return 0;
201 }
202 
204  int16_t *block, int n,
205  int qscale,
206  int index_bits,
207  int level_bias,
208  int level_shift)
209 {
210  int i, j, index1, index2, len;
211  int level, component, sign;
212  const uint8_t *weight_matrix;
213  OPEN_READER(bs, &ctx->gb);
214 
215  if (!ctx->is_444) {
216  if (n & 2) {
217  component = 1 + (n & 1);
218  weight_matrix = ctx->cid_table->chroma_weight;
219  } else {
220  component = 0;
221  weight_matrix = ctx->cid_table->luma_weight;
222  }
223  } else {
224  component = (n >> 1) % 3;
225  if (component) {
226  weight_matrix = ctx->cid_table->chroma_weight;
227  } else {
228  weight_matrix = ctx->cid_table->luma_weight;
229  }
230  }
231 
232  UPDATE_CACHE(bs, &ctx->gb);
233  GET_VLC(len, bs, &ctx->gb, ctx->dc_vlc.table, DNXHD_DC_VLC_BITS, 1);
234  if (len) {
235  level = GET_CACHE(bs, &ctx->gb);
236  LAST_SKIP_BITS(bs, &ctx->gb, len);
237  sign = ~level >> 31;
238  level = (NEG_USR32(sign ^ level, len) ^ sign) - sign;
239  ctx->last_dc[component] += level;
240  }
241  block[0] = ctx->last_dc[component];
242 
243  for (i = 1; ; i++) {
244  UPDATE_CACHE(bs, &ctx->gb);
245  GET_VLC(index1, bs, &ctx->gb, ctx->ac_vlc.table,
246  DNXHD_VLC_BITS, 2);
247  level = ctx->cid_table->ac_level[index1];
248  if (!level) /* EOB */
249  break;
250 
251  sign = SHOW_SBITS(bs, &ctx->gb, 1);
252  SKIP_BITS(bs, &ctx->gb, 1);
253 
254  if (ctx->cid_table->ac_index_flag[index1]) {
255  level += SHOW_UBITS(bs, &ctx->gb, index_bits) << 6;
256  SKIP_BITS(bs, &ctx->gb, index_bits);
257  }
258 
259  if (ctx->cid_table->ac_run_flag[index1]) {
260  UPDATE_CACHE(bs, &ctx->gb);
261  GET_VLC(index2, bs, &ctx->gb, ctx->run_vlc.table,
262  DNXHD_VLC_BITS, 2);
263  i += ctx->cid_table->run[index2];
264  }
265 
266  if (i > 63) {
267  av_log(ctx->avctx, AV_LOG_ERROR, "ac tex damaged %d, %d\n", n, i);
268  break;
269  }
270 
271  j = ctx->scantable.permutated[i];
272  level = (2 * level + 1) * qscale * weight_matrix[i];
273  if (level_bias < 32 || weight_matrix[i] != level_bias)
274  level += level_bias;
275  level >>= level_shift;
276 
277  block[j] = (level ^ sign) - sign;
278  }
279 
280  CLOSE_READER(bs, &ctx->gb);
281 }
282 
283 static void dnxhd_decode_dct_block_8(DNXHDContext *ctx, int16_t *block,
284  int n, int qscale)
285 {
286  dnxhd_decode_dct_block(ctx, block, n, qscale, 4, 32, 6);
287 }
288 
289 static void dnxhd_decode_dct_block_10(DNXHDContext *ctx, int16_t *block,
290  int n, int qscale)
291 {
292  dnxhd_decode_dct_block(ctx, block, n, qscale, 6, 8, 4);
293 }
294 
296  int n, int qscale)
297 {
298  dnxhd_decode_dct_block(ctx, block, n, qscale, 6, 32, 6);
299 }
300 
302  int x, int y)
303 {
304  int shift1 = ctx->bit_depth == 10;
305  int dct_linesize_luma = frame->linesize[0];
306  int dct_linesize_chroma = frame->linesize[1];
307  uint8_t *dest_y, *dest_u, *dest_v;
308  int dct_y_offset, dct_x_offset;
309  int qscale, i;
310 
311  qscale = get_bits(&ctx->gb, 11);
312  skip_bits1(&ctx->gb);
313 
314  for (i = 0; i < 8; i++) {
315  ctx->bdsp.clear_block(ctx->blocks[i]);
316  ctx->decode_dct_block(ctx, ctx->blocks[i], i, qscale);
317  }
318  if (ctx->is_444) {
319  for (; i < 12; i++) {
320  ctx->bdsp.clear_block(ctx->blocks[i]);
321  ctx->decode_dct_block(ctx, ctx->blocks[i], i, qscale);
322  }
323  }
324 
325  if (frame->interlaced_frame) {
326  dct_linesize_luma <<= 1;
327  dct_linesize_chroma <<= 1;
328  }
329 
330  dest_y = frame->data[0] + ((y * dct_linesize_luma) << 4) + (x << (4 + shift1));
331  dest_u = frame->data[1] + ((y * dct_linesize_chroma) << 4) + (x << (3 + shift1 + ctx->is_444));
332  dest_v = frame->data[2] + ((y * dct_linesize_chroma) << 4) + (x << (3 + shift1 + ctx->is_444));
333 
334  if (ctx->cur_field) {
335  dest_y += frame->linesize[0];
336  dest_u += frame->linesize[1];
337  dest_v += frame->linesize[2];
338  }
339 
340  dct_y_offset = dct_linesize_luma << 3;
341  dct_x_offset = 8 << shift1;
342  if (!ctx->is_444) {
343  ctx->idsp.idct_put(dest_y, dct_linesize_luma, ctx->blocks[0]);
344  ctx->idsp.idct_put(dest_y + dct_x_offset, dct_linesize_luma, ctx->blocks[1]);
345  ctx->idsp.idct_put(dest_y + dct_y_offset, dct_linesize_luma, ctx->blocks[4]);
346  ctx->idsp.idct_put(dest_y + dct_y_offset + dct_x_offset, dct_linesize_luma, ctx->blocks[5]);
347 
348  if (!(ctx->avctx->flags & CODEC_FLAG_GRAY)) {
349  dct_y_offset = dct_linesize_chroma << 3;
350  ctx->idsp.idct_put(dest_u, dct_linesize_chroma, ctx->blocks[2]);
351  ctx->idsp.idct_put(dest_v, dct_linesize_chroma, ctx->blocks[3]);
352  ctx->idsp.idct_put(dest_u + dct_y_offset, dct_linesize_chroma, ctx->blocks[6]);
353  ctx->idsp.idct_put(dest_v + dct_y_offset, dct_linesize_chroma, ctx->blocks[7]);
354  }
355  } else {
356  ctx->idsp.idct_put(dest_y, dct_linesize_luma, ctx->blocks[0]);
357  ctx->idsp.idct_put(dest_y + dct_x_offset, dct_linesize_luma, ctx->blocks[1]);
358  ctx->idsp.idct_put(dest_y + dct_y_offset, dct_linesize_luma, ctx->blocks[6]);
359  ctx->idsp.idct_put(dest_y + dct_y_offset + dct_x_offset, dct_linesize_luma, ctx->blocks[7]);
360 
361  if (!(ctx->avctx->flags & CODEC_FLAG_GRAY)) {
362  dct_y_offset = dct_linesize_chroma << 3;
363  ctx->idsp.idct_put(dest_u, dct_linesize_chroma, ctx->blocks[2]);
364  ctx->idsp.idct_put(dest_u + dct_x_offset, dct_linesize_chroma, ctx->blocks[3]);
365  ctx->idsp.idct_put(dest_u + dct_y_offset, dct_linesize_chroma, ctx->blocks[8]);
366  ctx->idsp.idct_put(dest_u + dct_y_offset + dct_x_offset, dct_linesize_chroma, ctx->blocks[9]);
367  ctx->idsp.idct_put(dest_v, dct_linesize_chroma, ctx->blocks[4]);
368  ctx->idsp.idct_put(dest_v + dct_x_offset, dct_linesize_chroma, ctx->blocks[5]);
369  ctx->idsp.idct_put(dest_v + dct_y_offset, dct_linesize_chroma, ctx->blocks[10]);
370  ctx->idsp.idct_put(dest_v + dct_y_offset + dct_x_offset, dct_linesize_chroma, ctx->blocks[11]);
371  }
372  }
373 
374  return 0;
375 }
376 
378  const uint8_t *buf, int buf_size)
379 {
380  int x, y;
381  for (y = 0; y < ctx->mb_height; y++) {
382  ctx->last_dc[0] =
383  ctx->last_dc[1] =
384  ctx->last_dc[2] = 1 << (ctx->bit_depth + 2); // for levels +2^(bitdepth-1)
385  init_get_bits(&ctx->gb, buf + ctx->mb_scan_index[y], (buf_size - ctx->mb_scan_index[y]) << 3);
386  for (x = 0; x < ctx->mb_width; x++) {
387  //START_TIMER;
388  dnxhd_decode_macroblock(ctx, frame, x, y);
389  //STOP_TIMER("decode macroblock");
390  }
391  }
392  return 0;
393 }
394 
396  int *got_frame, AVPacket *avpkt)
397 {
398  const uint8_t *buf = avpkt->data;
399  int buf_size = avpkt->size;
400  DNXHDContext *ctx = avctx->priv_data;
401  AVFrame *picture = data;
402  int first_field = 1;
403  int ret;
404 
405  av_dlog(avctx, "frame size %d\n", buf_size);
406 
407 decode_coding_unit:
408  if ((ret = dnxhd_decode_header(ctx, picture, buf, buf_size, first_field)) < 0)
409  return ret;
410 
411  if ((avctx->width || avctx->height) &&
412  (ctx->width != avctx->width || ctx->height != avctx->height)) {
413  av_log(avctx, AV_LOG_WARNING, "frame size changed: %dx%d -> %dx%d\n",
414  avctx->width, avctx->height, ctx->width, ctx->height);
415  first_field = 1;
416  }
417 
418  ret = ff_set_dimensions(avctx, ctx->width, ctx->height);
419  if (ret < 0)
420  return ret;
421 
422  if (first_field) {
423  if ((ret = ff_get_buffer(avctx, picture, 0)) < 0) {
424  av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
425  return ret;
426  }
427  picture->pict_type = AV_PICTURE_TYPE_I;
428  picture->key_frame = 1;
429  }
430 
431  dnxhd_decode_macroblocks(ctx, picture, buf + 0x280, buf_size - 0x280);
432 
433  if (first_field && picture->interlaced_frame) {
434  buf += ctx->cid_table->coding_unit_size;
435  buf_size -= ctx->cid_table->coding_unit_size;
436  first_field = 0;
437  goto decode_coding_unit;
438  }
439 
440  *got_frame = 1;
441  return buf_size;
442 }
443 
445 {
446  DNXHDContext *ctx = avctx->priv_data;
447 
448  ff_free_vlc(&ctx->ac_vlc);
449  ff_free_vlc(&ctx->dc_vlc);
450  ff_free_vlc(&ctx->run_vlc);
451  return 0;
452 }
453 
455  .name = "dnxhd",
456  .long_name = NULL_IF_CONFIG_SMALL("VC3/DNxHD"),
457  .type = AVMEDIA_TYPE_VIDEO,
458  .id = AV_CODEC_ID_DNXHD,
459  .priv_data_size = sizeof(DNXHDContext),
463  .capabilities = CODEC_CAP_DR1,
464 };
#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:135
const uint8_t * ac_level
Definition: dnxhddata.h:39
const uint8_t * dc_bits
Definition: dnxhddata.h:37
IDCTDSPContext idsp
Definition: dnxhddec.c:45
misc image utilities
static unsigned int get_bits(GetBitContext *s, int n)
Read 1-25 bits.
Definition: get_bits.h:240
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:129
const uint8_t * luma_weight
Definition: dnxhddata.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:133
void(* clear_block)(int16_t *block)
Definition: blockdsp.h:35
int last_dc[3]
Definition: dnxhddec.c:44
Scantable.
Definition: idctdsp.h:29
int size
Definition: avcodec.h:974
const CIDEntry ff_dnxhd_cid_table[]
Definition: dnxhddata.c:1076
const uint16_t * run_codes
Definition: dnxhddata.h:41
#define DECLARE_ALIGNED(n, t, v)
Definition: mem.h:58
VLC run_vlc
Definition: dnxhddec.c:43
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:1270
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:2530
VLC dc_vlc
Definition: dnxhddec.c:43
AVCodec.
Definition: avcodec.h:2812
static av_cold int dnxhd_decode_close(AVCodecContext *avctx)
Definition: dnxhddec.c:444
av_dlog(ac->avr, "%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)
static int decode(MimicContext *ctx, int quality, int num_coeffs, int is_iframe)
Definition: mimic.c:275
uint8_t
#define av_cold
Definition: attributes.h:66
#define AV_RB32
Definition: intreadwrite.h:130
void(* decode_dct_block)(struct DNXHDContext *ctx, int16_t *block, int n, int qscale)
Definition: dnxhddec.c:51
#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
const uint8_t * run_bits
Definition: dnxhddata.h:42
bitstream reader API header.
int bit_depth
Definition: dnxhddec.c:49
#define DNXHD_VLC_BITS
Definition: dnxhddec.c:55
int interlaced_frame
The content of the picture is interlaced.
Definition: frame.h:320
unsigned int coding_unit_size
Definition: dnxhddata.h:33
#define DNXHD_DC_VLC_BITS
Definition: dnxhddec.c:56
high precision timer, useful to profile code
const uint8_t * ac_index_flag
Definition: dnxhddata.h:40
VLC ac_vlc
Definition: dnxhddec.c:43
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:161
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:123
int ff_dnxhd_get_cid_table(int cid)
Definition: dnxhddata.c:1156
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:41
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:145
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:144
int flags
CODEC_FLAG_*.
Definition: avcodec.h:1144
unsigned int height
Definition: dnxhddec.c:39
const uint8_t * dc_codes
Definition: dnxhddata.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:2819
#define AV_PIX_FMT_YUV444P10
Definition: pixfmt.h:245
#define CLOSE_READER(name, gb)
Definition: get_bits.h:141
Definition: get_bits.h:64
planar YUV 4:2:2, 16bpp, (1 Cr & Cb sample per 2x1 Y samples)
Definition: pixfmt.h:69
const uint8_t * chroma_weight
Definition: dnxhddata.h:36
#define SKIP_BITS(name, gb, num)
Definition: get_bits.h:176
#define init_vlc(vlc, nb_bits, nb_codes, bits, bits_wrap, bits_size, codes, codes_wrap, codes_size, flags)
Definition: get_bits.h:424
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:203
enum AVPictureType pict_type
Picture type of the frame.
Definition: frame.h:196
int width
picture width / height.
Definition: avcodec.h:1229
#define NEG_USR32(a, s)
Definition: mathops.h:163
const uint8_t * run
Definition: dnxhddata.h:42
static void dnxhd_decode_dct_block_10(DNXHDContext *ctx, int16_t *block, int n, int qscale)
Definition: dnxhddec.c:289
#define LAST_SKIP_BITS(name, gb, num)
Definition: get_bits.h:182
ScanTable scantable
Definition: dnxhddec.c:47
unsigned int mb_width
Definition: dnxhddec.c:40
#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:456
uint8_t idct_permutation[64]
IDCT input permutation.
Definition: idctdsp.h:94
#define SHOW_UBITS(name, gb, num)
Definition: get_bits.h:188
static int dnxhd_decode_macroblocks(DNXHDContext *ctx, AVFrame *frame, const uint8_t *buf, int buf_size)
Definition: dnxhddec.c:377
int cid
compression id
Definition: dnxhddec.c:38
unsigned int width
Definition: dnxhddec.c:39
Libavcodec external API header.
int cur_field
current interlaced field
Definition: dnxhddec.c:42
unsigned int mb_height
Definition: dnxhddec.c:40
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:153
static int dnxhd_init_vlc(DNXHDContext *ctx, int cid)
Definition: dnxhddec.c:73
const uint8_t * ac_run_flag
Definition: dnxhddata.h:40
main external API structure.
Definition: avcodec.h:1050
static void(WINAPI *cond_broadcast)(pthread_cond_t *cond)
static void close(AVCodecParserContext *s)
Definition: h264_parser.c:490
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
static void dnxhd_decode_dct_block_10_444(DNXHDContext *ctx, int16_t *block, int n, int qscale)
Definition: dnxhddec.c:295
static void skip_bits1(GetBitContext *s)
Definition: get_bits.h:296
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
#define GET_CACHE(name, gb)
Definition: get_bits.h:192
const uint8_t ff_zigzag_direct[64]
Definition: mathtables.c:115
int is_444
Definition: dnxhddec.c:50
#define AV_PIX_FMT_YUV422P10
Definition: pixfmt.h:244
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:141
uint8_t level
Definition: svq3.c:147
static void dnxhd_decode_dct_block_8(DNXHDContext *ctx, int16_t *block, int n, int qscale)
Definition: dnxhddec.c:283
#define SHOW_SBITS(name, gb, num)
Definition: get_bits.h:189
common internal api header.
#define CODEC_FLAG_GRAY
Only decode/encode grayscale.
Definition: avcodec.h:637
GetBitContext gb
Definition: dnxhddec.c:36
static av_cold int init(AVCodecParserContext *s)
Definition: h264_parser.c:499
void * priv_data
Definition: avcodec.h:1092
static int dnxhd_decode_macroblock(DNXHDContext *ctx, AVFrame *frame, int x, int y)
Definition: dnxhddec.c:301
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:156
int top_field_first
If the content is interlaced, is top field displayed first.
Definition: frame.h:325
static int dnxhd_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
Definition: dnxhddec.c:395
int len
VLC_TYPE(* table)[2]
code, bits
Definition: get_bits.h:66
AVCodecContext * avctx
Definition: dnxhddec.c:35
int key_frame
1 -> keyframe, 0-> not
Definition: frame.h:191
BlockDSPContext bdsp
Definition: dnxhddec.c:37
AVCodec ff_dnxhd_decoder
Definition: dnxhddec.c:454
const CIDEntry * cid_table
Definition: dnxhddec.c:48
#define av_always_inline
Definition: attributes.h:40
static int dnxhd_decode_header(DNXHDContext *ctx, AVFrame *frame, const uint8_t *buf, int buf_size, int first_field)
Definition: dnxhddec.c:105
static int first_field(int fd)
Definition: v4l2.c:212
This structure stores compressed data.
Definition: avcodec.h:950
void ff_free_vlc(VLC *vlc)
Definition: bitstream.c:333
static av_cold int dnxhd_decode_init(AVCodecContext *avctx)
Definition: dnxhddec.c:65
int16_t blocks[12][64]
Definition: dnxhddec.c:46
static int16_t block[64]
Definition: dct-test.c:88