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mjpegenc.c
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1 /*
2  * MJPEG encoder
3  * Copyright (c) 2000, 2001 Fabrice Bellard
4  * Copyright (c) 2003 Alex Beregszaszi
5  * Copyright (c) 2003-2004 Michael Niedermayer
6  *
7  * Support for external huffman table, various fixes (AVID workaround),
8  * aspecting, new decode_frame mechanism and apple mjpeg-b support
9  * by Alex Beregszaszi
10  *
11  * This file is part of FFmpeg.
12  *
13  * FFmpeg is free software; you can redistribute it and/or
14  * modify it under the terms of the GNU Lesser General Public
15  * License as published by the Free Software Foundation; either
16  * version 2.1 of the License, or (at your option) any later version.
17  *
18  * FFmpeg is distributed in the hope that it will be useful,
19  * but WITHOUT ANY WARRANTY; without even the implied warranty of
20  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
21  * Lesser General Public License for more details.
22  *
23  * You should have received a copy of the GNU Lesser General Public
24  * License along with FFmpeg; if not, write to the Free Software
25  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
26  */
27 
28 /**
29  * @file
30  * MJPEG encoder.
31  */
32 
33 #include "libavutil/pixdesc.h"
34 
35 #include "avcodec.h"
36 #include "jpegtables.h"
37 #include "mjpegenc_common.h"
38 #include "mpegvideo.h"
39 #include "mjpeg.h"
40 #include "mjpegenc.h"
41 
42 
44 {
45  MJpegContext *m = s->mjpeg_ctx;
46  size_t num_mbs, num_blocks, num_codes;
47  int blocks_per_mb;
48 
49  // We need to init this here as the mjpeg init is called before the common init,
50  s->mb_width = (s->width + 15) / 16;
51  s->mb_height = (s->height + 15) / 16;
52 
53  switch (s->chroma_format) {
54  case CHROMA_420: blocks_per_mb = 6; break;
55  case CHROMA_422: blocks_per_mb = 8; break;
56  case CHROMA_444: blocks_per_mb = 12; break;
57  default: av_assert0(0);
58  };
59 
60  // Make sure we have enough space to hold this frame.
61  num_mbs = s->mb_width * s->mb_height;
62  num_blocks = num_mbs * blocks_per_mb;
63  num_codes = num_blocks * 64;
64 
65  m->huff_buffer = av_malloc_array(num_codes, sizeof(MJpegHuffmanCode));
66  if (!m->huff_buffer)
67  return AVERROR(ENOMEM);
68  return 0;
69 }
70 
72 {
73  MJpegContext *m;
74 
76 
77  if (s->width > 65500 || s->height > 65500) {
78  av_log(s, AV_LOG_ERROR, "JPEG does not support resolutions above 65500x65500\n");
79  return AVERROR(EINVAL);
80  }
81 
82  m = av_mallocz(sizeof(MJpegContext));
83  if (!m)
84  return AVERROR(ENOMEM);
85 
86  s->min_qcoeff=-1023;
87  s->max_qcoeff= 1023;
88 
89  // Build default Huffman tables.
90  // These may be overwritten later with more optimal Huffman tables, but
91  // they are needed at least right now for some processes like trellis.
108 
115 
116  // Buffers start out empty.
117  m->huff_ncode = 0;
118  s->mjpeg_ctx = m;
119 
121  return alloc_huffman(s);
122 
123  return 0;
124 }
125 
127 {
129  av_freep(&s->mjpeg_ctx);
130 }
131 
132 /**
133  * Encodes and outputs the entire frame in the JPEG format.
134  *
135  * @param s The MpegEncContext.
136  */
138 {
139  int i, nbits, code, table_id;
140  MJpegContext *m = s->mjpeg_ctx;
141  uint8_t *huff_size[4] = {m->huff_size_dc_luminance,
145  uint16_t *huff_code[4] = {m->huff_code_dc_luminance,
149  size_t total_bits = 0;
150  size_t bytes_needed;
151 
152  s->header_bits = get_bits_diff(s);
153  // Estimate the total size first
154  for (i = 0; i < m->huff_ncode; i++) {
155  table_id = m->huff_buffer[i].table_id;
156  code = m->huff_buffer[i].code;
157  nbits = code & 0xf;
158 
159  total_bits += huff_size[table_id][code] + nbits;
160  }
161 
162  bytes_needed = (total_bits + 7) / 8;
163  ff_mpv_reallocate_putbitbuffer(s, bytes_needed, bytes_needed);
164 
165  for (i = 0; i < m->huff_ncode; i++) {
166  table_id = m->huff_buffer[i].table_id;
167  code = m->huff_buffer[i].code;
168  nbits = code & 0xf;
169 
170  put_bits(&s->pb, huff_size[table_id][code], huff_code[table_id][code]);
171  if (nbits != 0) {
172  put_sbits(&s->pb, nbits, m->huff_buffer[i].mant);
173  }
174  }
175 
176  m->huff_ncode = 0;
177  s->i_tex_bits = get_bits_diff(s);
178 }
179 
180 /**
181  * Add code and table_id to the JPEG buffer.
182  *
183  * @param s The MJpegContext which contains the JPEG buffer.
184  * @param table_id Which Huffman table the code belongs to.
185  * @param code The encoded exponent of the coefficients and the run-bits.
186  */
187 static inline void ff_mjpeg_encode_code(MJpegContext *s, uint8_t table_id, int code)
188 {
190  c->table_id = table_id;
191  c->code = code;
192 }
193 
194 /**
195  * Add the coefficient's data to the JPEG buffer.
196  *
197  * @param s The MJpegContext which contains the JPEG buffer.
198  * @param table_id Which Huffman table the code belongs to.
199  * @param val The coefficient.
200  * @param run The run-bits.
201  */
202 static void ff_mjpeg_encode_coef(MJpegContext *s, uint8_t table_id, int val, int run)
203 {
204  int mant, code;
205 
206  if (val == 0) {
207  av_assert0(run == 0);
208  ff_mjpeg_encode_code(s, table_id, 0);
209  } else {
210  mant = val;
211  if (val < 0) {
212  val = -val;
213  mant--;
214  }
215 
216  code = (run << 4) | (av_log2_16bit(val) + 1);
217 
218  s->huff_buffer[s->huff_ncode].mant = mant;
219  ff_mjpeg_encode_code(s, table_id, code);
220  }
221 }
222 
223 /**
224  * Add the block's data into the JPEG buffer.
225  *
226  * @param s The MJpegEncContext that contains the JPEG buffer.
227  * @param block The block.
228  * @param n The block's index or number.
229  */
230 static void record_block(MpegEncContext *s, int16_t *block, int n)
231 {
232  int i, j, table_id;
233  int component, dc, last_index, val, run;
234  MJpegContext *m = s->mjpeg_ctx;
235 
236  /* DC coef */
237  component = (n <= 3 ? 0 : (n&1) + 1);
238  table_id = (n <= 3 ? 0 : 1);
239  dc = block[0]; /* overflow is impossible */
240  val = dc - s->last_dc[component];
241 
242  ff_mjpeg_encode_coef(m, table_id, val, 0);
243 
244  s->last_dc[component] = dc;
245 
246  /* AC coefs */
247 
248  run = 0;
249  last_index = s->block_last_index[n];
250  table_id |= 2;
251 
252  for(i=1;i<=last_index;i++) {
253  j = s->intra_scantable.permutated[i];
254  val = block[j];
255 
256  if (val == 0) {
257  run++;
258  } else {
259  while (run >= 16) {
260  ff_mjpeg_encode_code(m, table_id, 0xf0);
261  run -= 16;
262  }
263  ff_mjpeg_encode_coef(m, table_id, val, run);
264  run = 0;
265  }
266  }
267 
268  /* output EOB only if not already 64 values */
269  if (last_index < 63 || run != 0)
270  ff_mjpeg_encode_code(m, table_id, 0);
271 }
272 
273 static void encode_block(MpegEncContext *s, int16_t *block, int n)
274 {
275  int mant, nbits, code, i, j;
276  int component, dc, run, last_index, val;
277  MJpegContext *m = s->mjpeg_ctx;
278  uint8_t *huff_size_ac;
279  uint16_t *huff_code_ac;
280 
281  /* DC coef */
282  component = (n <= 3 ? 0 : (n&1) + 1);
283  dc = block[0]; /* overflow is impossible */
284  val = dc - s->last_dc[component];
285  if (n < 4) {
287  huff_size_ac = m->huff_size_ac_luminance;
288  huff_code_ac = m->huff_code_ac_luminance;
289  } else {
291  huff_size_ac = m->huff_size_ac_chrominance;
292  huff_code_ac = m->huff_code_ac_chrominance;
293  }
294  s->last_dc[component] = dc;
295 
296  /* AC coefs */
297 
298  run = 0;
299  last_index = s->block_last_index[n];
300  for(i=1;i<=last_index;i++) {
301  j = s->intra_scantable.permutated[i];
302  val = block[j];
303  if (val == 0) {
304  run++;
305  } else {
306  while (run >= 16) {
307  put_bits(&s->pb, huff_size_ac[0xf0], huff_code_ac[0xf0]);
308  run -= 16;
309  }
310  mant = val;
311  if (val < 0) {
312  val = -val;
313  mant--;
314  }
315 
316  nbits= av_log2_16bit(val) + 1;
317  code = (run << 4) | nbits;
318 
319  put_bits(&s->pb, huff_size_ac[code], huff_code_ac[code]);
320 
321  put_sbits(&s->pb, nbits, mant);
322  run = 0;
323  }
324  }
325 
326  /* output EOB only if not already 64 values */
327  if (last_index < 63 || run != 0)
328  put_bits(&s->pb, huff_size_ac[0], huff_code_ac[0]);
329 }
330 
331 void ff_mjpeg_encode_mb(MpegEncContext *s, int16_t block[12][64])
332 {
333  int i;
334  if (s->huffman == HUFFMAN_TABLE_OPTIMAL) {
335  if (s->chroma_format == CHROMA_444) {
336  record_block(s, block[0], 0);
337  record_block(s, block[2], 2);
338  record_block(s, block[4], 4);
339  record_block(s, block[8], 8);
340  record_block(s, block[5], 5);
341  record_block(s, block[9], 9);
342 
343  if (16*s->mb_x+8 < s->width) {
344  record_block(s, block[1], 1);
345  record_block(s, block[3], 3);
346  record_block(s, block[6], 6);
347  record_block(s, block[10], 10);
348  record_block(s, block[7], 7);
349  record_block(s, block[11], 11);
350  }
351  } else {
352  for(i=0;i<5;i++) {
353  record_block(s, block[i], i);
354  }
355  if (s->chroma_format == CHROMA_420) {
356  record_block(s, block[5], 5);
357  } else {
358  record_block(s, block[6], 6);
359  record_block(s, block[5], 5);
360  record_block(s, block[7], 7);
361  }
362  }
363  } else {
364  if (s->chroma_format == CHROMA_444) {
365  encode_block(s, block[0], 0);
366  encode_block(s, block[2], 2);
367  encode_block(s, block[4], 4);
368  encode_block(s, block[8], 8);
369  encode_block(s, block[5], 5);
370  encode_block(s, block[9], 9);
371 
372  if (16*s->mb_x+8 < s->width) {
373  encode_block(s, block[1], 1);
374  encode_block(s, block[3], 3);
375  encode_block(s, block[6], 6);
376  encode_block(s, block[10], 10);
377  encode_block(s, block[7], 7);
378  encode_block(s, block[11], 11);
379  }
380  } else {
381  for(i=0;i<5;i++) {
382  encode_block(s, block[i], i);
383  }
384  if (s->chroma_format == CHROMA_420) {
385  encode_block(s, block[5], 5);
386  } else {
387  encode_block(s, block[6], 6);
388  encode_block(s, block[5], 5);
389  encode_block(s, block[7], 7);
390  }
391  }
392 
393  s->i_tex_bits += get_bits_diff(s);
394  }
395 }
396 
397 // maximum over s->mjpeg_vsample[i]
398 #define V_MAX 2
400  const AVFrame *pic_arg, int *got_packet)
401 
402 {
403  MpegEncContext *s = avctx->priv_data;
404  AVFrame *pic;
405  int i, ret;
406  int chroma_h_shift, chroma_v_shift;
407 
408  av_pix_fmt_get_chroma_sub_sample(avctx->pix_fmt, &chroma_h_shift, &chroma_v_shift);
409 
410 #if FF_API_EMU_EDGE
411  //CODEC_FLAG_EMU_EDGE have to be cleared
413  return AVERROR(EINVAL);
414 #endif
415 
416  if ((avctx->height & 15) && avctx->strict_std_compliance > FF_COMPLIANCE_UNOFFICIAL) {
417  av_log(avctx, AV_LOG_ERROR,
418  "Heights which are not a multiple of 16 might fail with some decoders, "
419  "use vstrict=-1 / -strict -1 to use %d anyway.\n", avctx->height);
420  av_log(avctx, AV_LOG_WARNING, "If you have a device that plays AMV videos, please test if videos "
421  "with such heights work with it and report your findings to ffmpeg-devel@ffmpeg.org\n");
422  return AVERROR_EXPERIMENTAL;
423  }
424 
425  pic = av_frame_clone(pic_arg);
426  if (!pic)
427  return AVERROR(ENOMEM);
428  //picture should be flipped upside-down
429  for(i=0; i < 3; i++) {
430  int vsample = i ? 2 >> chroma_v_shift : 2;
431  pic->data[i] += pic->linesize[i] * (vsample * s->height / V_MAX - 1);
432  pic->linesize[i] *= -1;
433  }
434  ret = ff_mpv_encode_picture(avctx, pkt, pic, got_packet);
435  av_frame_free(&pic);
436  return ret;
437 }
438 
439 #define OFFSET(x) offsetof(MpegEncContext, x)
440 #define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
441 static const AVOption options[] = {
443 { "pred", "Prediction method", OFFSET(pred), AV_OPT_TYPE_INT, { .i64 = 1 }, 1, 3, VE, "pred" },
444  { "left", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = 1 }, INT_MIN, INT_MAX, VE, "pred" },
445  { "plane", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = 2 }, INT_MIN, INT_MAX, VE, "pred" },
446  { "median", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = 3 }, INT_MIN, INT_MAX, VE, "pred" },
447 { "huffman", "Huffman table strategy", OFFSET(huffman), AV_OPT_TYPE_INT, { .i64 = HUFFMAN_TABLE_OPTIMAL }, 0, NB_HUFFMAN_TABLE_OPTION - 1, VE, "huffman" },
448  { "default", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = HUFFMAN_TABLE_DEFAULT }, INT_MIN, INT_MAX, VE, "huffman" },
449  { "optimal", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = HUFFMAN_TABLE_OPTIMAL }, INT_MIN, INT_MAX, VE, "huffman" },
450 { NULL},
451 };
452 
453 #if CONFIG_MJPEG_ENCODER
454 
455 static const AVClass mjpeg_class = {
456  .class_name = "mjpeg encoder",
457  .item_name = av_default_item_name,
458  .option = options,
459  .version = LIBAVUTIL_VERSION_INT,
460 };
461 
462 AVCodec ff_mjpeg_encoder = {
463  .name = "mjpeg",
464  .long_name = NULL_IF_CONFIG_SMALL("MJPEG (Motion JPEG)"),
465  .type = AVMEDIA_TYPE_VIDEO,
466  .id = AV_CODEC_ID_MJPEG,
467  .priv_data_size = sizeof(MpegEncContext),
469  .encode2 = ff_mpv_encode_picture,
470  .close = ff_mpv_encode_end,
472  .pix_fmts = (const enum AVPixelFormat[]){
474  },
475  .priv_class = &mjpeg_class,
476 };
477 #endif
478 #if CONFIG_AMV_ENCODER
479 static const AVClass amv_class = {
480  .class_name = "amv encoder",
481  .item_name = av_default_item_name,
482  .option = options,
483  .version = LIBAVUTIL_VERSION_INT,
484 };
485 
486 AVCodec ff_amv_encoder = {
487  .name = "amv",
488  .long_name = NULL_IF_CONFIG_SMALL("AMV Video"),
489  .type = AVMEDIA_TYPE_VIDEO,
490  .id = AV_CODEC_ID_AMV,
491  .priv_data_size = sizeof(MpegEncContext),
493  .encode2 = amv_encode_picture,
494  .close = ff_mpv_encode_end,
495  .pix_fmts = (const enum AVPixelFormat[]){
497  },
498  .priv_class = &amv_class,
499 };
500 #endif
#define NULL
Definition: coverity.c:32
const char const char void * val
Definition: avisynth_c.h:771
const char * s
Definition: avisynth_c.h:768
Holds JPEG frame data and Huffman table data.
Definition: mjpegenc.h:59
This structure describes decoded (raw) audio or video data.
Definition: frame.h:193
AVOption.
Definition: opt.h:246
static void ff_mjpeg_encode_coef(MJpegContext *s, uint8_t table_id, int val, int run)
Add the coefficient's data to the JPEG buffer.
Definition: mjpegenc.c:202
static void put_sbits(PutBitContext *pb, int n, int32_t value)
Definition: put_bits.h:200
static void put_bits(Jpeg2000EncoderContext *s, int val, int n)
put n times val bit
Definition: j2kenc.c:206
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
#define LIBAVUTIL_VERSION_INT
Definition: version.h:85
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:35
MJPEG encoder.
#define FF_MPV_COMMON_OPTS
Definition: mpegvideo.h:605
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:1960
int min_qcoeff
minimum encodable coefficient
Definition: mpegvideo.h:308
mpegvideo header.
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
Definition: mem.c:222
av_cold int ff_mjpeg_encode_init(MpegEncContext *s)
Definition: mjpegenc.c:71
uint8_t permutated[64]
Definition: idctdsp.h:33
uint8_t run
Definition: svq3.c:206
static AVPacket pkt
uint8_t * intra_ac_vlc_length
Definition: mpegvideo.h:311
int av_log2_16bit(unsigned v)
Definition: intmath.c:31
AVCodec.
Definition: avcodec.h:3681
av_cold void ff_init_uni_ac_vlc(const uint8_t huff_size_ac[256], uint8_t *uni_ac_vlc_len)
MJPEG encoder and decoder.
uint16_t huff_code_dc_chrominance[12]
DC chrominance Huffman table codes.
Definition: mjpegenc.h:64
#define AV_CODEC_CAP_INTRA_ONLY
Codec is intra only.
Definition: avcodec.h:1090
static int16_t block[64]
Definition: dct.c:115
const char * class_name
The name of the class; usually it is the same name as the context structure type to which the AVClass...
Definition: log.h:72
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
#define V_MAX
Definition: mjpegenc.c:398
void ff_mjpeg_build_huffman_codes(uint8_t *huff_size, uint16_t *huff_code, const uint8_t *bits_table, const uint8_t *val_table)
Definition: jpegtables.c:127
uint16_t huff_code_ac_luminance[256]
AC luminance Huffman table codes.
Definition: mjpegenc.h:67
uint8_t
#define av_cold
Definition: attributes.h:82
static void encode_block(MpegEncContext *s, int16_t *block, int n)
Definition: mjpegenc.c:273
static int amv_encode_picture(AVCodecContext *avctx, AVPacket *pkt, const AVFrame *pic_arg, int *got_packet)
Definition: mjpegenc.c:399
uint8_t uni_chroma_ac_vlc_len[64 *64 *2]
Storage for AC chrominance VLC (in MpegEncContext)
Definition: mjpegenc.h:74
const uint8_t avpriv_mjpeg_bits_dc_luminance[17]
Definition: jpegtables.c:65
#define CHROMA_420
Definition: mpegvideo.h:473
planar YUV 4:2:2, 16bpp, full scale (JPEG), deprecated in favor of AV_PIX_FMT_YUV422P and setting col...
Definition: pixfmt.h:75
uint8_t huff_size_dc_chrominance[12]
DC chrominance Huffman table size.
Definition: mjpegenc.h:63
int mb_height
number of MBs horizontally & vertically
Definition: mpegvideo.h:126
Use the default Huffman tables.
Definition: mjpegenc.h:96
int max_qcoeff
maximum encodable coefficient
Definition: mpegvideo.h:309
#define CHROMA_444
Definition: mpegvideo.h:475
#define av_log(a,...)
#define FF_COMPLIANCE_UNOFFICIAL
Allow unofficial extensions.
Definition: avcodec.h:2955
uint8_t table_id
The Huffman table id associated with the data.
Definition: mjpegenc.h:51
static int get_bits_diff(MpegEncContext *s)
Definition: mpegvideo.h:745
uint16_t huff_code_ac_chrominance[256]
AC chrominance Huffman table codes.
Definition: mjpegenc.h:69
int slice_context_count
number of used thread_contexts
Definition: mpegvideo.h:153
uint8_t huff_size_ac_luminance[256]
AC luminance Huffman table size.
Definition: mjpegenc.h:66
uint16_t mant
The mantissa.
Definition: mjpegenc.h:53
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
int last_dc[3]
last DC values for MPEG-1
Definition: mpegvideo.h:182
av_default_item_name
#define AVERROR(e)
Definition: error.h:43
const uint8_t avpriv_mjpeg_bits_dc_chrominance[17]
Definition: jpegtables.c:70
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:163
int av_pix_fmt_get_chroma_sub_sample(enum AVPixelFormat pix_fmt, int *h_shift, int *v_shift)
Utility function to access log2_chroma_w log2_chroma_h from the pixel format AVPixFmtDescriptor.
Definition: pixdesc.c:2361
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:179
static void record_block(MpegEncContext *s, int16_t *block, int n)
Add the block's data into the JPEG buffer.
Definition: mjpegenc.c:230
uint8_t * intra_chroma_ac_vlc_length
Definition: mpegvideo.h:313
int flags
AV_CODEC_FLAG_*.
Definition: avcodec.h:1827
uint8_t huff_size_ac_chrominance[256]
AC chrominance Huffman table size.
Definition: mjpegenc.h:68
const char * name
Name of the codec implementation.
Definition: avcodec.h:3688
#define AV_CODEC_CAP_FRAME_THREADS
Codec supports frame-level multithreading.
Definition: avcodec.h:1060
int ff_mpv_reallocate_putbitbuffer(MpegEncContext *s, size_t threshold, size_t size_increase)
uint8_t * intra_ac_vlc_last_length
Definition: mpegvideo.h:312
#define CHROMA_422
Definition: mpegvideo.h:474
planar YUV 4:2:0, 12bpp, full scale (JPEG), deprecated in favor of AV_PIX_FMT_YUV420P and setting col...
Definition: pixfmt.h:74
uint8_t uni_ac_vlc_len[64 *64 *2]
Storage for AC luminance VLC (in MpegEncContext)
Definition: mjpegenc.h:72
int block_last_index[12]
last non zero coefficient in block
Definition: mpegvideo.h:83
int n
Definition: avisynth_c.h:684
void ff_mjpeg_encode_picture_frame(MpegEncContext *s)
Encodes and outputs the entire frame in the JPEG format.
Definition: mjpegenc.c:137
AVFrame * av_frame_clone(const AVFrame *src)
Create a new frame that references the same data as src.
Definition: frame.c:485
#define AVERROR_EXPERIMENTAL
Requested feature is flagged experimental. Set strict_std_compliance if you really want to use it...
Definition: error.h:72
Compute and use optimal Huffman tables.
Definition: mjpegenc.h:97
static const float pred[4]
Definition: siprdata.h:259
struct MJpegContext * mjpeg_ctx
Definition: mpegvideo.h:422
#define AV_CODEC_CAP_SLICE_THREADS
Codec supports slice-based (or partition-based) multithreading.
Definition: avcodec.h:1064
#define OFFSET(x)
Definition: mjpegenc.c:439
static void ff_mjpeg_encode_code(MJpegContext *s, uint8_t table_id, int code)
Add code and table_id to the JPEG buffer.
Definition: mjpegenc.c:187
Buffer of JPEG frame data.
Definition: mjpegenc.h:49
void ff_mjpeg_encode_dc(PutBitContext *pb, int val, uint8_t *huff_size, uint16_t *huff_code)
Libavcodec external API header.
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:224
static int alloc_huffman(MpegEncContext *s)
Definition: mjpegenc.c:43
uint8_t * intra_chroma_ac_vlc_last_length
Definition: mpegvideo.h:314
main external API structure.
Definition: avcodec.h:1732
ScanTable intra_scantable
Definition: mpegvideo.h:88
int height
picture size. must be a multiple of 16
Definition: mpegvideo.h:97
int ff_mpv_encode_init(AVCodecContext *avctx)
#define VE
Definition: mjpegenc.c:440
const uint8_t avpriv_mjpeg_val_dc[12]
Definition: jpegtables.c:67
Describe the class of an AVClass context structure.
Definition: log.h:67
av_cold void ff_mjpeg_encode_close(MpegEncContext *s)
Definition: mjpegenc.c:126
const uint8_t avpriv_mjpeg_bits_ac_chrominance[17]
Definition: jpegtables.c:99
static enum AVPixelFormat pix_fmts[]
Definition: libkvazaar.c:266
const uint8_t avpriv_mjpeg_val_ac_chrominance[]
Definition: jpegtables.c:102
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:207
MpegEncContext.
Definition: mpegvideo.h:78
struct AVCodecContext * avctx
Definition: mpegvideo.h:95
uint16_t huff_code_dc_luminance[12]
DC luminance Huffman table codes.
Definition: mjpegenc.h:62
PutBitContext pb
bit output
Definition: mpegvideo.h:148
uint8_t huff_size_dc_luminance[12]
DC luminance Huffman table size.
Definition: mjpegenc.h:61
#define CODEC_FLAG_EMU_EDGE
Definition: avcodec.h:1135
uint8_t code
The exponent.
Definition: mjpegenc.h:52
static double c[64]
size_t huff_ncode
Number of current entries in the buffer.
Definition: mjpegenc.h:88
planar YUV 4:4:4, 24bpp, full scale (JPEG), deprecated in favor of AV_PIX_FMT_YUV444P and setting col...
Definition: pixfmt.h:76
int ff_mpv_encode_end(AVCodecContext *avctx)
const uint8_t avpriv_mjpeg_bits_ac_luminance[17]
Definition: jpegtables.c:73
void * priv_data
Definition: avcodec.h:1774
const uint8_t avpriv_mjpeg_val_ac_luminance[]
Definition: jpegtables.c:75
void ff_mjpeg_encode_mb(MpegEncContext *s, int16_t block[12][64])
Definition: mjpegenc.c:331
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_log(ac->avr, AV_LOG_TRACE,"%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
#define av_freep(p)
#define av_malloc_array(a, b)
MJpegHuffmanCode * huff_buffer
Buffer for Huffman code values.
Definition: mjpegenc.h:89
int ff_mpv_encode_picture(AVCodecContext *avctx, AVPacket *pkt, const AVFrame *frame, int *got_packet)
AVPixelFormat
Pixel format.
Definition: pixfmt.h:60
This structure stores compressed data.
Definition: avcodec.h:1634
int strict_std_compliance
strictly follow the standard (MPEG-4, ...).
Definition: avcodec.h:2951
static const AVOption options[]
Definition: mjpegenc.c:441