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mjpegenc_common.c
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1 /*
2  * lossless JPEG shared bits
3  * Copyright (c) 2000, 2001 Fabrice Bellard
4  * Copyright (c) 2003 Alex Beregszaszi
5  *
6  * This file is part of FFmpeg.
7  *
8  * FFmpeg is free software; you can redistribute it and/or
9  * modify it under the terms of the GNU Lesser General Public
10  * License as published by the Free Software Foundation; either
11  * version 2.1 of the License, or (at your option) any later version.
12  *
13  * FFmpeg is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16  * Lesser General Public License for more details.
17  *
18  * You should have received a copy of the GNU Lesser General Public
19  * License along with FFmpeg; if not, write to the Free Software
20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21  */
22 
23 #include <stdint.h>
24 #include <string.h>
25 
26 #include "libavutil/common.h"
27 #include "libavutil/pixdesc.h"
28 #include "libavutil/pixfmt.h"
29 
30 #include "avcodec.h"
31 #include "idctdsp.h"
32 #include "jpegtables.h"
33 #include "put_bits.h"
34 #include "mjpegenc.h"
35 #include "mjpegenc_common.h"
36 #include "mjpeg.h"
37 
38 /* table_class: 0 = DC coef, 1 = AC coefs */
39 static int put_huffman_table(PutBitContext *p, int table_class, int table_id,
40  const uint8_t *bits_table, const uint8_t *value_table)
41 {
42  int n, i;
43 
44  put_bits(p, 4, table_class);
45  put_bits(p, 4, table_id);
46 
47  n = 0;
48  for(i=1;i<=16;i++) {
49  n += bits_table[i];
50  put_bits(p, 8, bits_table[i]);
51  }
52 
53  for(i=0;i<n;i++)
54  put_bits(p, 8, value_table[i]);
55 
56  return n + 17;
57 }
58 
60  ScanTable *intra_scantable,
61  uint16_t luma_intra_matrix[64],
62  uint16_t chroma_intra_matrix[64],
63  int hsample[3])
64 {
65  int i, j, size;
66  uint8_t *ptr;
67  MpegEncContext *s = avctx->priv_data;
68 
69  if (avctx->codec_id != AV_CODEC_ID_LJPEG) {
70  int matrix_count = 1 + !!memcmp(luma_intra_matrix,
71  chroma_intra_matrix,
72  sizeof(luma_intra_matrix[0]) * 64);
74  matrix_count = 2;
75  /* quant matrixes */
76  put_marker(p, DQT);
77  put_bits(p, 16, 2 + matrix_count * (1 + 64));
78  put_bits(p, 4, 0); /* 8 bit precision */
79  put_bits(p, 4, 0); /* table 0 */
80  for(i=0;i<64;i++) {
81  j = intra_scantable->permutated[i];
82  put_bits(p, 8, luma_intra_matrix[j]);
83  }
84 
85  if (matrix_count > 1) {
86  put_bits(p, 4, 0); /* 8 bit precision */
87  put_bits(p, 4, 1); /* table 1 */
88  for(i=0;i<64;i++) {
89  j = intra_scantable->permutated[i];
90  put_bits(p, 8, chroma_intra_matrix[j]);
91  }
92  }
93  }
94 
96  put_marker(p, DRI);
97  put_bits(p, 16, 4);
98  put_bits(p, 16, (avctx->width-1)/(8*hsample[0]) + 1);
99  }
100 
101  /* huffman table */
102  put_marker(p, DHT);
103  flush_put_bits(p);
104  ptr = put_bits_ptr(p);
105  put_bits(p, 16, 0); /* patched later */
106  size = 2;
111 
116  AV_WB16(ptr, size);
117 }
118 
120 {
121  int size;
122  uint8_t *ptr;
123 
124  if (avctx->sample_aspect_ratio.num > 0 && avctx->sample_aspect_ratio.den > 0) {
125  /* JFIF header */
126  put_marker(p, APP0);
127  put_bits(p, 16, 16);
128  avpriv_put_string(p, "JFIF", 1); /* this puts the trailing zero-byte too */
129  /* The most significant byte is used for major revisions, the least
130  * significant byte for minor revisions. Version 1.02 is the current
131  * released revision. */
132  put_bits(p, 16, 0x0102);
133  put_bits(p, 8, 0); /* units type: 0 - aspect ratio */
134  put_bits(p, 16, avctx->sample_aspect_ratio.num);
135  put_bits(p, 16, avctx->sample_aspect_ratio.den);
136  put_bits(p, 8, 0); /* thumbnail width */
137  put_bits(p, 8, 0); /* thumbnail height */
138  }
139 
140  /* comment */
141  if (!(avctx->flags & AV_CODEC_FLAG_BITEXACT)) {
142  put_marker(p, COM);
143  flush_put_bits(p);
144  ptr = put_bits_ptr(p);
145  put_bits(p, 16, 0); /* patched later */
147  size = strlen(LIBAVCODEC_IDENT)+3;
148  AV_WB16(ptr, size);
149  }
150 
151  if (((avctx->pix_fmt == AV_PIX_FMT_YUV420P ||
152  avctx->pix_fmt == AV_PIX_FMT_YUV422P ||
153  avctx->pix_fmt == AV_PIX_FMT_YUV444P) && avctx->color_range != AVCOL_RANGE_JPEG)
154  || avctx->color_range == AVCOL_RANGE_MPEG) {
155  put_marker(p, COM);
156  flush_put_bits(p);
157  ptr = put_bits_ptr(p);
158  put_bits(p, 16, 0); /* patched later */
159  avpriv_put_string(p, "CS=ITU601", 1);
160  size = strlen("CS=ITU601")+3;
161  AV_WB16(ptr, size);
162  }
163 }
164 
165 void ff_mjpeg_init_hvsample(AVCodecContext *avctx, int hsample[4], int vsample[4])
166 {
167  int chroma_h_shift, chroma_v_shift;
168 
169  av_pix_fmt_get_chroma_sub_sample(avctx->pix_fmt, &chroma_h_shift,
170  &chroma_v_shift);
171  if (avctx->codec->id == AV_CODEC_ID_LJPEG &&
172  ( avctx->pix_fmt == AV_PIX_FMT_BGR0
173  || avctx->pix_fmt == AV_PIX_FMT_BGRA
174  || avctx->pix_fmt == AV_PIX_FMT_BGR24)) {
175  vsample[0] = hsample[0] =
176  vsample[1] = hsample[1] =
177  vsample[2] = hsample[2] =
178  vsample[3] = hsample[3] = 1;
179  } else if (avctx->pix_fmt == AV_PIX_FMT_YUV444P || avctx->pix_fmt == AV_PIX_FMT_YUVJ444P) {
180  vsample[0] = vsample[1] = vsample[2] = 2;
181  hsample[0] = hsample[1] = hsample[2] = 1;
182  } else {
183  vsample[0] = 2;
184  vsample[1] = 2 >> chroma_v_shift;
185  vsample[2] = 2 >> chroma_v_shift;
186  hsample[0] = 2;
187  hsample[1] = 2 >> chroma_h_shift;
188  hsample[2] = 2 >> chroma_h_shift;
189  }
190 }
191 
193  ScanTable *intra_scantable, int pred,
194  uint16_t luma_intra_matrix[64],
195  uint16_t chroma_intra_matrix[64])
196 {
197  const int lossless = avctx->codec_id != AV_CODEC_ID_MJPEG && avctx->codec_id != AV_CODEC_ID_AMV;
198  int hsample[4], vsample[4];
199  int i;
200  int components = 3 + (avctx->pix_fmt == AV_PIX_FMT_BGRA);
201  int chroma_matrix = !!memcmp(luma_intra_matrix,
202  chroma_intra_matrix,
203  sizeof(luma_intra_matrix[0])*64);
204 
205  ff_mjpeg_init_hvsample(avctx, hsample, vsample);
206 
207  put_marker(pb, SOI);
208 
209  // hack for AMV mjpeg format
210  if(avctx->codec_id == AV_CODEC_ID_AMV) goto end;
211 
212  jpeg_put_comments(avctx, pb);
213 
214  jpeg_table_header(avctx, pb, intra_scantable, luma_intra_matrix, chroma_intra_matrix, hsample);
215 
216  switch (avctx->codec_id) {
217  case AV_CODEC_ID_MJPEG: put_marker(pb, SOF0 ); break;
218  case AV_CODEC_ID_LJPEG: put_marker(pb, SOF3 ); break;
219  default: av_assert0(0);
220  }
221 
222  put_bits(pb, 16, 17);
223  if (lossless && ( avctx->pix_fmt == AV_PIX_FMT_BGR0
224  || avctx->pix_fmt == AV_PIX_FMT_BGRA
225  || avctx->pix_fmt == AV_PIX_FMT_BGR24))
226  put_bits(pb, 8, 9); /* 9 bits/component RCT */
227  else
228  put_bits(pb, 8, 8); /* 8 bits/component */
229  put_bits(pb, 16, avctx->height);
230  put_bits(pb, 16, avctx->width);
231  put_bits(pb, 8, components); /* 3 or 4 components */
232 
233  /* Y component */
234  put_bits(pb, 8, 1); /* component number */
235  put_bits(pb, 4, hsample[0]); /* H factor */
236  put_bits(pb, 4, vsample[0]); /* V factor */
237  put_bits(pb, 8, 0); /* select matrix */
238 
239  /* Cb component */
240  put_bits(pb, 8, 2); /* component number */
241  put_bits(pb, 4, hsample[1]); /* H factor */
242  put_bits(pb, 4, vsample[1]); /* V factor */
243  put_bits(pb, 8, lossless ? 0 : chroma_matrix); /* select matrix */
244 
245  /* Cr component */
246  put_bits(pb, 8, 3); /* component number */
247  put_bits(pb, 4, hsample[2]); /* H factor */
248  put_bits(pb, 4, vsample[2]); /* V factor */
249  put_bits(pb, 8, lossless ? 0 : chroma_matrix); /* select matrix */
250 
251  if (components == 4) {
252  put_bits(pb, 8, 4); /* component number */
253  put_bits(pb, 4, hsample[3]); /* H factor */
254  put_bits(pb, 4, vsample[3]); /* V factor */
255  put_bits(pb, 8, 0); /* select matrix */
256  }
257 
258  /* scan header */
259  put_marker(pb, SOS);
260  put_bits(pb, 16, 6 + 2*components); /* length */
261  put_bits(pb, 8, components); /* 3 components */
262 
263  /* Y component */
264  put_bits(pb, 8, 1); /* index */
265  put_bits(pb, 4, 0); /* DC huffman table index */
266  put_bits(pb, 4, 0); /* AC huffman table index */
267 
268  /* Cb component */
269  put_bits(pb, 8, 2); /* index */
270  put_bits(pb, 4, 1); /* DC huffman table index */
271  put_bits(pb, 4, lossless ? 0 : 1); /* AC huffman table index */
272 
273  /* Cr component */
274  put_bits(pb, 8, 3); /* index */
275  put_bits(pb, 4, 1); /* DC huffman table index */
276  put_bits(pb, 4, lossless ? 0 : 1); /* AC huffman table index */
277 
278  if (components == 4) {
279  /* Alpha component */
280  put_bits(pb, 8, 4); /* index */
281  put_bits(pb, 4, 0); /* DC huffman table index */
282  put_bits(pb, 4, 0); /* AC huffman table index */
283  }
284 
285  put_bits(pb, 8, lossless ? pred : 0); /* Ss (not used) */
286 
287  switch (avctx->codec_id) {
288  case AV_CODEC_ID_MJPEG: put_bits(pb, 8, 63); break; /* Se (not used) */
289  case AV_CODEC_ID_LJPEG: put_bits(pb, 8, 0); break; /* not used */
290  default: av_assert0(0);
291  }
292 
293  put_bits(pb, 8, 0); /* Ah/Al (not used) */
294 
295 end:
296  if (!lossless) {
297  MpegEncContext *s = avctx->priv_data;
298  av_assert0(avctx->codec->priv_data_size == sizeof(MpegEncContext));
299 
300  s->esc_pos = put_bits_count(pb) >> 3;
301  for(i=1; i<s->slice_context_count; i++)
302  s->thread_context[i]->esc_pos = 0;
303  }
304 }
305 
307 {
308  int size;
309  int i, ff_count;
310  uint8_t *buf = pb->buf + start;
311  int align= (-(size_t)(buf))&3;
312  int pad = (-put_bits_count(pb))&7;
313 
314  if (pad)
315  put_bits(pb, pad, (1<<pad)-1);
316 
317  flush_put_bits(pb);
318  size = put_bits_count(pb) - start * 8;
319 
320  av_assert1((size&7) == 0);
321  size >>= 3;
322 
323  ff_count=0;
324  for(i=0; i<size && i<align; i++){
325  if(buf[i]==0xFF) ff_count++;
326  }
327  for(; i<size-15; i+=16){
328  int acc, v;
329 
330  v= *(uint32_t*)(&buf[i]);
331  acc= (((v & (v>>4))&0x0F0F0F0F)+0x01010101)&0x10101010;
332  v= *(uint32_t*)(&buf[i+4]);
333  acc+=(((v & (v>>4))&0x0F0F0F0F)+0x01010101)&0x10101010;
334  v= *(uint32_t*)(&buf[i+8]);
335  acc+=(((v & (v>>4))&0x0F0F0F0F)+0x01010101)&0x10101010;
336  v= *(uint32_t*)(&buf[i+12]);
337  acc+=(((v & (v>>4))&0x0F0F0F0F)+0x01010101)&0x10101010;
338 
339  acc>>=4;
340  acc+= (acc>>16);
341  acc+= (acc>>8);
342  ff_count+= acc&0xFF;
343  }
344  for(; i<size; i++){
345  if(buf[i]==0xFF) ff_count++;
346  }
347 
348  if(ff_count==0) return;
349 
350  flush_put_bits(pb);
351  skip_put_bytes(pb, ff_count);
352 
353  for(i=size-1; ff_count; i--){
354  int v= buf[i];
355 
356  if(v==0xFF){
357  buf[i+ff_count]= 0;
358  ff_count--;
359  }
360 
361  buf[i+ff_count]= v;
362  }
363 }
364 
366 {
367  int i;
368  PutBitContext *pbc = &s->pb;
369  int mb_y = s->mb_y - !s->mb_x;
370 
371  int ret = ff_mpv_reallocate_putbitbuffer(s, put_bits_count(&s->pb) / 8 + 100,
372  put_bits_count(&s->pb) / 4 + 1000);
373  if (ret < 0) {
374  av_log(s->avctx, AV_LOG_ERROR, "Buffer reallocation failed\n");
375  goto fail;
376  }
377 
378  ff_mjpeg_escape_FF(pbc, s->esc_pos);
379 
380  if((s->avctx->active_thread_type & FF_THREAD_SLICE) && mb_y < s->mb_height)
381  put_marker(pbc, RST0 + (mb_y&7));
382  s->esc_pos = put_bits_count(pbc) >> 3;
383 fail:
384 
385  for(i=0; i<3; i++)
386  s->last_dc[i] = 128 << s->intra_dc_precision;
387 
388  return ret;
389 }
390 
392 {
393  av_assert1((header_bits & 7) == 0);
394 
395  put_marker(pb, EOI);
396 }
397 
399  uint8_t *huff_size, uint16_t *huff_code)
400 {
401  int mant, nbits;
402 
403  if (val == 0) {
404  put_bits(pb, huff_size[0], huff_code[0]);
405  } else {
406  mant = val;
407  if (val < 0) {
408  val = -val;
409  mant--;
410  }
411 
412  nbits= av_log2_16bit(val) + 1;
413 
414  put_bits(pb, huff_size[nbits], huff_code[nbits]);
415 
416  put_sbits(pb, nbits, mant);
417  }
418 }
const struct AVCodec * codec
Definition: avcodec.h:1541
const char const char void * val
Definition: avisynth_c.h:634
const char * s
Definition: avisynth_c.h:631
Definition: mjpeg.h:71
Definition: mjpeg.h:111
Definition: mjpeg.h:73
static void put_sbits(PutBitContext *pb, int n, int32_t value)
Definition: put_bits.h:200
planar YUV 4:4:4, 24bpp, (1 Cr & Cb sample per 1x1 Y samples)
Definition: pixfmt.h:68
static void put_bits(Jpeg2000EncoderContext *s, int val, int n)
put n times val bit
Definition: j2kenc.c:168
Definition: mjpeg.h:42
int acc
Definition: yuv2rgb.c:543
MJPEG encoder.
enum AVColorRange color_range
MPEG vs JPEG YUV range.
Definition: avcodec.h:2262
Scantable.
Definition: idctdsp.h:29
int num
numerator
Definition: rational.h:44
void ff_mjpeg_init_hvsample(AVCodecContext *avctx, int hsample[4], int vsample[4])
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:1935
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:1752
Definition: mjpeg.h:75
uint8_t permutated[64]
Definition: idctdsp.h:31
int av_log2_16bit(unsigned v)
Definition: intmath.c:31
MJPEG encoder and decoder.
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
Definition: mjpeg.h:72
uint8_t
static av_cold int end(AVCodecContext *avctx)
Definition: avrndec.c:90
int force_duplicated_matrix
Force duplication of mjpeg matrices, useful for rtp streaming.
Definition: mpegvideo.h:304
const uint8_t avpriv_mjpeg_bits_dc_luminance[17]
Definition: jpegtables.c:65
int intra_dc_precision
Definition: mpegvideo.h:460
ptrdiff_t size
Definition: opengl_enc.c:101
#define AV_WB16(p, v)
Definition: intreadwrite.h:405
#define av_log(a,...)
enum AVCodecID id
Definition: avcodec.h:3406
int slice_context_count
number of used thread_contexts
Definition: mpegvideo.h:153
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
static uint8_t * put_bits_ptr(PutBitContext *s)
Return the pointer to the byte where the bitstream writer will put the next bit.
Definition: put_bits.h:227
int last_dc[3]
last DC values for MPEG1
Definition: mpegvideo.h:182
const uint8_t avpriv_mjpeg_bits_dc_chrominance[17]
Definition: jpegtables.c:70
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:2185
int active_thread_type
Which multithreading methods are in use by the codec.
Definition: avcodec.h:2973
packed BGRA 8:8:8:8, 32bpp, BGRABGRA...
Definition: pixfmt.h:97
int flags
AV_CODEC_FLAG_*.
Definition: avcodec.h:1627
uint8_t * buf
Definition: put_bits.h:38
void ff_mjpeg_encode_picture_trailer(PutBitContext *pb, int header_bits)
#define fail()
Definition: checkasm.h:80
Definition: mjpeg.h:39
Definition: mjpeg.h:70
static int put_bits_count(PutBitContext *s)
Definition: put_bits.h:85
planar YUV 4:2:2, 16bpp, (1 Cr & Cb sample per 2x1 Y samples)
Definition: pixfmt.h:67
int ff_mpv_reallocate_putbitbuffer(MpegEncContext *s, size_t threshold, size_t size_increase)
Definition: mjpeg.h:79
static void put_marker(PutBitContext *p, enum JpegMarker code)
Definition: mjpegenc.h:54
Definition: mjpeg.h:56
static void skip_put_bytes(PutBitContext *s, int n)
Skip the given number of bytes.
Definition: put_bits.h:236
#define AV_CODEC_FLAG_BITEXACT
Use only bitexact stuff (except (I)DCT).
Definition: avcodec.h:787
#define av_assert1(cond)
assert() equivalent, that does not lie in speed critical code.
Definition: avassert.h:53
int width
picture width / height.
Definition: avcodec.h:1711
int priv_data_size
Definition: avcodec.h:3428
#define FF_THREAD_SLICE
Decode more than one part of a single frame at once.
Definition: avcodec.h:2966
void ff_mjpeg_escape_FF(PutBitContext *pb, int start)
int n
Definition: avisynth_c.h:547
packed RGB 8:8:8, 24bpp, BGRBGR...
Definition: pixfmt.h:66
the normal 2^n-1 "JPEG" YUV ranges
Definition: pixfmt.h:443
static const float pred[4]
Definition: siprdata.h:259
const AVS_VideoInfo int align
Definition: avisynth_c.h:658
struct MpegEncContext * thread_context[MAX_THREADS]
Definition: mpegvideo.h:152
void ff_mjpeg_encode_dc(PutBitContext *pb, int val, uint8_t *huff_size, uint16_t *huff_code)
Libavcodec external API header.
enum AVCodecID codec_id
Definition: avcodec.h:1549
main external API structure.
Definition: avcodec.h:1532
void * buf
Definition: avisynth_c.h:553
static void jpeg_table_header(AVCodecContext *avctx, PutBitContext *p, ScanTable *intra_scantable, uint16_t luma_intra_matrix[64], uint16_t chroma_intra_matrix[64], int hsample[3])
const uint8_t avpriv_mjpeg_val_dc[12]
Definition: jpegtables.c:67
packed BGR 8:8:8, 32bpp, BGRXBGRX... X=unused/undefined
Definition: pixfmt.h:248
int ff_mjpeg_encode_stuffing(MpegEncContext *s)
const uint8_t avpriv_mjpeg_bits_ac_chrominance[17]
Definition: jpegtables.c:99
void ff_mjpeg_encode_picture_header(AVCodecContext *avctx, PutBitContext *pb, ScanTable *intra_scantable, int pred, uint16_t luma_intra_matrix[64], uint16_t chroma_intra_matrix[64])
const uint8_t avpriv_mjpeg_val_ac_chrominance[]
Definition: jpegtables.c:102
the normal 219*2^(n-8) "MPEG" YUV ranges
Definition: pixfmt.h:442
MpegEncContext.
Definition: mpegvideo.h:78
struct AVCodecContext * avctx
Definition: mpegvideo.h:95
PutBitContext pb
bit output
Definition: mpegvideo.h:148
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
Definition: pixfmt.h:63
static void flush_put_bits(PutBitContext *s)
Pad the end of the output stream with zeros.
Definition: put_bits.h:101
common internal and external API header
planar YUV 4:4:4, 24bpp, full scale (JPEG), deprecated in favor of AV_PIX_FMT_YUV444P and setting col...
Definition: pixfmt.h:77
int den
denominator
Definition: rational.h:45
const uint8_t avpriv_mjpeg_bits_ac_luminance[17]
Definition: jpegtables.c:73
void * priv_data
Definition: avcodec.h:1574
pixel format definitions
const uint8_t avpriv_mjpeg_val_ac_luminance[]
Definition: jpegtables.c:75
static int put_huffman_table(PutBitContext *p, int table_class, int table_id, const uint8_t *bits_table, const uint8_t *value_table)
#define LIBAVCODEC_IDENT
Definition: version.h:43
void avpriv_put_string(PutBitContext *pb, const char *string, int terminate_string)
Put the string string in the bitstream.
Definition: bitstream.c:54
void INT64 start
Definition: avisynth_c.h:553
static void jpeg_put_comments(AVCodecContext *avctx, PutBitContext *p)
Definition: mjpeg.h:61
bitstream writer API