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ljpegenc.c
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1 /*
2  * lossless JPEG 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  * lossless JPEG encoder.
31  */
32 
33 #include "libavutil/frame.h"
34 #include "libavutil/mem.h"
35 #include "libavutil/pixdesc.h"
36 
37 #include "avcodec.h"
38 #include "idctdsp.h"
39 #include "internal.h"
40 #include "jpegtables.h"
41 #include "mjpegenc_common.h"
42 #include "mjpeg.h"
43 
44 typedef struct LJpegEncContext {
45  AVClass *class;
48  uint16_t matrix[64];
49 
50  int vsample[4];
51  int hsample[4];
52 
53  uint16_t huff_code_dc_luminance[12];
57 
58  uint16_t (*scratch)[4];
59  int pred;
61 
63  const AVFrame *frame)
64 {
65  LJpegEncContext *s = avctx->priv_data;
66  const int width = frame->width;
67  const int height = frame->height;
68  const int linesize = frame->linesize[0];
69  uint16_t (*buffer)[4] = s->scratch;
70  int left[4], top[4], topleft[4];
71  int x, y, i;
72 
73 #if FF_API_PRIVATE_OPT
75  if (avctx->prediction_method)
76  s->pred = avctx->prediction_method + 1;
78 #endif
79 
80  for (i = 0; i < 4; i++)
81  buffer[0][i] = 1 << (9 - 1);
82 
83  for (y = 0; y < height; y++) {
84  const int modified_predictor = y ? s->pred : 1;
85  uint8_t *ptr = frame->data[0] + (linesize * y);
86 
87  if (pb->buf_end - pb->buf - (put_bits_count(pb) >> 3) < width * 4 * 4) {
88  av_log(avctx, AV_LOG_ERROR, "encoded frame too large\n");
89  return -1;
90  }
91 
92  for (i = 0; i < 4; i++)
93  top[i]= left[i]= topleft[i]= buffer[0][i];
94 
95  for (x = 0; x < width; x++) {
96  if(avctx->pix_fmt == AV_PIX_FMT_BGR24){
97  buffer[x][1] = ptr[3 * x + 0] - ptr[3 * x + 1] + 0x100;
98  buffer[x][2] = ptr[3 * x + 2] - ptr[3 * x + 1] + 0x100;
99  buffer[x][0] = (ptr[3 * x + 0] + 2 * ptr[3 * x + 1] + ptr[3 * x + 2]) >> 2;
100  }else{
101  buffer[x][1] = ptr[4 * x + 0] - ptr[4 * x + 1] + 0x100;
102  buffer[x][2] = ptr[4 * x + 2] - ptr[4 * x + 1] + 0x100;
103  buffer[x][0] = (ptr[4 * x + 0] + 2 * ptr[4 * x + 1] + ptr[4 * x + 2]) >> 2;
104  if (avctx->pix_fmt == AV_PIX_FMT_BGRA)
105  buffer[x][3] = ptr[4 * x + 3];
106  }
107 
108  for (i = 0; i < 3 + (avctx->pix_fmt == AV_PIX_FMT_BGRA); i++) {
109  int pred, diff;
110 
111  PREDICT(pred, topleft[i], top[i], left[i], modified_predictor);
112 
113  topleft[i] = top[i];
114  top[i] = buffer[x+1][i];
115 
116  left[i] = buffer[x][i];
117 
118  diff = ((left[i] - pred + 0x100) & 0x1FF) - 0x100;
119 
120  if (i == 0 || i == 3)
122  else
124  }
125  }
126  }
127 
128  return 0;
129 }
130 
132  const AVFrame *frame, int predictor,
133  int mb_x, int mb_y)
134 {
135  int i;
136 
137  if (mb_x == 0 || mb_y == 0) {
138  for (i = 0; i < 3; i++) {
139  uint8_t *ptr;
140  int x, y, h, v, linesize;
141  h = s->hsample[i];
142  v = s->vsample[i];
143  linesize = frame->linesize[i];
144 
145  for (y = 0; y < v; y++) {
146  for (x = 0; x < h; x++) {
147  int pred;
148 
149  ptr = frame->data[i] + (linesize * (v * mb_y + y)) + (h * mb_x + x); //FIXME optimize this crap
150  if (y == 0 && mb_y == 0) {
151  if (x == 0 && mb_x == 0)
152  pred = 128;
153  else
154  pred = ptr[-1];
155  } else {
156  if (x == 0 && mb_x == 0) {
157  pred = ptr[-linesize];
158  } else {
159  PREDICT(pred, ptr[-linesize - 1], ptr[-linesize],
160  ptr[-1], predictor);
161  }
162  }
163 
164  if (i == 0)
165  ff_mjpeg_encode_dc(pb, *ptr - pred, s->huff_size_dc_luminance, s->huff_code_dc_luminance); //FIXME ugly
166  else
168  }
169  }
170  }
171  } else {
172  for (i = 0; i < 3; i++) {
173  uint8_t *ptr;
174  int x, y, h, v, linesize;
175  h = s->hsample[i];
176  v = s->vsample[i];
177  linesize = frame->linesize[i];
178 
179  for (y = 0; y < v; y++) {
180  for (x = 0; x < h; x++) {
181  int pred;
182 
183  ptr = frame->data[i] + (linesize * (v * mb_y + y)) + (h * mb_x + x); //FIXME optimize this crap
184  PREDICT(pred, ptr[-linesize - 1], ptr[-linesize], ptr[-1], predictor);
185 
186  if (i == 0)
187  ff_mjpeg_encode_dc(pb, *ptr - pred, s->huff_size_dc_luminance, s->huff_code_dc_luminance); //FIXME ugly
188  else
190  }
191  }
192  }
193  }
194 }
195 
197  const AVFrame *frame)
198 {
199  LJpegEncContext *s = avctx->priv_data;
200  const int mb_width = (avctx->width + s->hsample[0] - 1) / s->hsample[0];
201  const int mb_height = (avctx->height + s->vsample[0] - 1) / s->vsample[0];
202  int mb_x, mb_y;
203 
204 #if FF_API_PRIVATE_OPT
206  if (avctx->prediction_method)
207  s->pred = avctx->prediction_method + 1;
209 #endif
210 
211  for (mb_y = 0; mb_y < mb_height; mb_y++) {
212  if (pb->buf_end - pb->buf - (put_bits_count(pb) >> 3) <
213  mb_width * 4 * 3 * s->hsample[0] * s->vsample[0]) {
214  av_log(avctx, AV_LOG_ERROR, "encoded frame too large\n");
215  return -1;
216  }
217 
218  for (mb_x = 0; mb_x < mb_width; mb_x++)
219  ljpeg_encode_yuv_mb(s, pb, frame, s->pred, mb_x, mb_y);
220  }
221 
222  return 0;
223 }
224 
226  const AVFrame *pict, int *got_packet)
227 {
228  LJpegEncContext *s = avctx->priv_data;
229  PutBitContext pb;
230  const int width = avctx->width;
231  const int height = avctx->height;
232  const int mb_width = (width + s->hsample[0] - 1) / s->hsample[0];
233  const int mb_height = (height + s->vsample[0] - 1) / s->vsample[0];
234  int max_pkt_size = AV_INPUT_BUFFER_MIN_SIZE;
235  int ret, header_bits;
236 
237  if( avctx->pix_fmt == AV_PIX_FMT_BGR0
238  || avctx->pix_fmt == AV_PIX_FMT_BGR24)
239  max_pkt_size += width * height * 3 * 4;
240  else if(avctx->pix_fmt == AV_PIX_FMT_BGRA)
241  max_pkt_size += width * height * 4 * 4;
242  else {
243  max_pkt_size += mb_width * mb_height * 3 * 4
244  * s->hsample[0] * s->vsample[0];
245  }
246 
247  if ((ret = ff_alloc_packet2(avctx, pkt, max_pkt_size, 0)) < 0)
248  return ret;
249 
250  init_put_bits(&pb, pkt->data, pkt->size);
251 
253  s->pred, s->matrix, s->matrix);
254 
255  header_bits = put_bits_count(&pb);
256 
257  if( avctx->pix_fmt == AV_PIX_FMT_BGR0
258  || avctx->pix_fmt == AV_PIX_FMT_BGRA
259  || avctx->pix_fmt == AV_PIX_FMT_BGR24)
260  ret = ljpeg_encode_bgr(avctx, &pb, pict);
261  else
262  ret = ljpeg_encode_yuv(avctx, &pb, pict);
263  if (ret < 0)
264  return ret;
265 
266  emms_c();
267 
268  ff_mjpeg_escape_FF(&pb, header_bits >> 3);
269  ff_mjpeg_encode_picture_trailer(&pb, header_bits);
270 
271  flush_put_bits(&pb);
272  pkt->size = put_bits_ptr(&pb) - pb.buf;
273  pkt->flags |= AV_PKT_FLAG_KEY;
274  *got_packet = 1;
275 
276  return 0;
277 }
278 
280 {
281  LJpegEncContext *s = avctx->priv_data;
282 
283  av_freep(&s->scratch);
284 
285  return 0;
286 }
287 
289 {
290  LJpegEncContext *s = avctx->priv_data;
291 
292  if ((avctx->pix_fmt == AV_PIX_FMT_YUV420P ||
293  avctx->pix_fmt == AV_PIX_FMT_YUV422P ||
294  avctx->pix_fmt == AV_PIX_FMT_YUV444P ||
295  avctx->color_range == AVCOL_RANGE_MPEG) &&
297  av_log(avctx, AV_LOG_ERROR,
298  "Limited range YUV is non-standard, set strict_std_compliance to "
299  "at least unofficial to use it.\n");
300  return AVERROR(EINVAL);
301  }
302 
303 #if FF_API_CODED_FRAME
306  avctx->coded_frame->key_frame = 1;
308 #endif
309 
310  s->scratch = av_malloc_array(avctx->width + 1, sizeof(*s->scratch));
311  if (!s->scratch)
312  goto fail;
313 
314  ff_idctdsp_init(&s->idsp, avctx);
317 
318  ff_mjpeg_init_hvsample(avctx, s->hsample, s->vsample);
319 
328 
329  return 0;
330 fail:
331  ljpeg_encode_close(avctx);
332  return AVERROR(ENOMEM);
333 }
334 
335 #define OFFSET(x) offsetof(LJpegEncContext, x)
336 #define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
337 static const AVOption options[] = {
338 { "pred", "Prediction method", OFFSET(pred), AV_OPT_TYPE_INT, { .i64 = 1 }, 1, 3, VE, "pred" },
339  { "left", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = 1 }, INT_MIN, INT_MAX, VE, "pred" },
340  { "plane", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = 2 }, INT_MIN, INT_MAX, VE, "pred" },
341  { "median", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = 3 }, INT_MIN, INT_MAX, VE, "pred" },
342 
343  { NULL},
344 };
345 
346 static const AVClass ljpeg_class = {
347  .class_name = "ljpeg",
348  .item_name = av_default_item_name,
349  .option = options,
350  .version = LIBAVUTIL_VERSION_INT,
351 };
352 
354  .name = "ljpeg",
355  .long_name = NULL_IF_CONFIG_SMALL("Lossless JPEG"),
356  .type = AVMEDIA_TYPE_VIDEO,
357  .id = AV_CODEC_ID_LJPEG,
358  .priv_data_size = sizeof(LJpegEncContext),
359  .priv_class = &ljpeg_class,
361  .encode2 = ljpeg_encode_frame,
362  .close = ljpeg_encode_close,
364  .pix_fmts = (const enum AVPixelFormat[]){
369 };
AVCodec ff_ljpeg_encoder
Definition: ljpegenc.c:353
#define NULL
Definition: coverity.c:32
IDCTDSPContext idsp
Definition: ljpegenc.c:46
const char * s
Definition: avisynth_c.h:768
This structure describes decoded (raw) audio or video data.
Definition: frame.h:201
AVOption.
Definition: opt.h:246
planar YUV 4:4:4, 24bpp, (1 Cr & Cb sample per 1x1 Y samples)
Definition: pixfmt.h:67
#define LIBAVUTIL_VERSION_INT
Definition: version.h:86
Memory handling functions.
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:35
enum AVColorRange color_range
MPEG vs JPEG YUV range.
Definition: avcodec.h:2491
Scantable.
Definition: idctdsp.h:31
int hsample[4]
Definition: ljpegenc.c:51
int size
Definition: avcodec.h:1673
void ff_mjpeg_init_hvsample(AVCodecContext *avctx, int hsample[4], int vsample[4])
static const AVClass ljpeg_class
Definition: ljpegenc.c:346
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:1982
static AVPacket pkt
AVCodec.
Definition: avcodec.h:3730
MJPEG encoder and decoder.
#define AV_CODEC_CAP_INTRA_ONLY
Codec is intra only.
Definition: avcodec.h:1095
uint16_t(* scratch)[4]
Definition: ljpegenc.c:58
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
uint8_t huff_size_dc_chrominance[12]
Definition: ljpegenc.c:56
int ff_alloc_packet2(AVCodecContext *avctx, AVPacket *avpkt, int64_t size, int64_t min_size)
Check AVPacket size and/or allocate data.
Definition: encode.c:32
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
uint8_t
#define av_cold
Definition: attributes.h:82
const uint8_t avpriv_mjpeg_bits_dc_luminance[17]
Definition: jpegtables.c:65
static AVFrame * frame
#define height
uint8_t * data
Definition: avcodec.h:1672
planar YUV 4:2:2, 16bpp, full scale (JPEG), deprecated in favor of AV_PIX_FMT_YUV422P and setting col...
Definition: pixfmt.h:75
#define AV_INPUT_BUFFER_MIN_SIZE
minimum encoding buffer size Used to avoid some checks during header writing.
Definition: avcodec.h:784
#define av_log(a,...)
#define FF_COMPLIANCE_UNOFFICIAL
Allow unofficial extensions.
Definition: avcodec.h:2977
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
Definition: avcodec.h:1704
#define PREDICT(ret, topleft, top, left, predictor)
Definition: mjpeg.h:118
static void predictor(uint8_t *src, int size)
Definition: exr.c:268
int width
Definition: frame.h:259
#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:324
av_default_item_name
#define AVERROR(e)
Definition: error.h:43
const uint8_t avpriv_mjpeg_bits_dc_chrominance[17]
Definition: jpegtables.c:70
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:179
packed BGRA 8:8:8:8, 32bpp, BGRABGRA...
Definition: pixfmt.h:96
uint8_t * buf
Definition: put_bits.h:38
uint16_t width
Definition: gdv.c:47
const char * name
Name of the codec implementation.
Definition: avcodec.h:3737
void ff_mjpeg_encode_picture_trailer(PutBitContext *pb, int header_bits)
uint16_t matrix[64]
Definition: ljpegenc.c:48
ScanTable scantable
Definition: ljpegenc.c:47
#define fail()
Definition: checkasm.h:109
#define AV_CODEC_CAP_FRAME_THREADS
Codec supports frame-level multithreading.
Definition: avcodec.h:1065
int flags
A combination of AV_PKT_FLAG values.
Definition: avcodec.h:1678
reference-counted frame API
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:66
static int ljpeg_encode_frame(AVCodecContext *avctx, AVPacket *pkt, const AVFrame *pict, int *got_packet)
Definition: ljpegenc.c:225
enum AVPictureType pict_type
Picture type of the frame.
Definition: frame.h:284
static av_cold int ljpeg_encode_init(AVCodecContext *avctx)
Definition: ljpegenc.c:288
planar YUV 4:2:0, 12bpp, full scale (JPEG), deprecated in favor of AV_PIX_FMT_YUV420P and setting col...
Definition: pixfmt.h:74
int width
picture width / height.
Definition: avcodec.h:1941
static av_cold int ljpeg_encode_close(AVCodecContext *avctx)
Definition: ljpegenc.c:279
uint16_t huff_code_dc_chrominance[12]
Definition: ljpegenc.c:54
void ff_mjpeg_escape_FF(PutBitContext *pb, int start)
uint8_t idct_permutation[64]
IDCT input permutation.
Definition: idctdsp.h:96
packed RGB 8:8:8, 24bpp, BGRBGR...
Definition: pixfmt.h:65
static const float pred[4]
Definition: siprdata.h:259
#define OFFSET(x)
Definition: ljpegenc.c:335
void ff_mjpeg_encode_dc(PutBitContext *pb, int val, uint8_t *huff_size, uint16_t *huff_code)
Libavcodec external API header.
attribute_deprecated int prediction_method
Definition: avcodec.h:2145
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:232
main external API structure.
Definition: avcodec.h:1754
uint8_t * buf_end
Definition: put_bits.h:38
const uint8_t avpriv_mjpeg_val_dc[12]
Definition: jpegtables.c:67
#define VE
Definition: ljpegenc.c:336
Describe the class of an AVClass context structure.
Definition: log.h:67
const uint8_t ff_zigzag_direct[64]
Definition: mathtables.c:98
packed BGR 8:8:8, 32bpp, BGRXBGRX... X=unused/undefined
Definition: pixfmt.h:254
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])
static enum AVPixelFormat pix_fmts[]
Definition: libkvazaar.c:266
static int ljpeg_encode_yuv(AVCodecContext *avctx, PutBitContext *pb, const AVFrame *frame)
Definition: ljpegenc.c:196
static int ljpeg_encode_bgr(AVCodecContext *avctx, PutBitContext *pb, const AVFrame *frame)
Definition: ljpegenc.c:62
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:215
the normal 219*2^(n-8) "MPEG" YUV ranges
Definition: pixfmt.h:509
uint16_t huff_code_dc_luminance[12]
Definition: ljpegenc.c:53
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
Definition: pixfmt.h:62
#define FF_DISABLE_DEPRECATION_WARNINGS
Definition: internal.h:83
common internal api header.
static void flush_put_bits(PutBitContext *s)
Pad the end of the output stream with zeros.
Definition: put_bits.h:101
uint8_t huff_size_dc_luminance[12]
Definition: ljpegenc.c:55
planar YUV 4:4:4, 24bpp, full scale (JPEG), deprecated in favor of AV_PIX_FMT_YUV444P and setting col...
Definition: pixfmt.h:76
attribute_deprecated AVFrame * coded_frame
the picture in the bitstream
Definition: avcodec.h:3174
static void init_put_bits(PutBitContext *s, uint8_t *buffer, int buffer_size)
Initialize the PutBitContext s.
Definition: put_bits.h:48
void * priv_data
Definition: avcodec.h:1796
static av_always_inline int diff(const uint32_t a, const uint32_t b)
av_cold void ff_init_scantable(uint8_t *permutation, ScanTable *st, const uint8_t *src_scantable)
Definition: idctdsp.c:29
static void ljpeg_encode_yuv_mb(LJpegEncContext *s, PutBitContext *pb, const AVFrame *frame, int predictor, int mb_x, int mb_y)
Definition: ljpegenc.c:131
av_cold void ff_idctdsp_init(IDCTDSPContext *c, AVCodecContext *avctx)
Definition: idctdsp.c:238
#define FF_ENABLE_DEPRECATION_WARNINGS
Definition: internal.h:84
int key_frame
1 -> keyframe, 0-> not
Definition: frame.h:279
int height
Definition: frame.h:259
#define av_freep(p)
#define av_malloc_array(a, b)
AVPixelFormat
Pixel format.
Definition: pixfmt.h:60
This structure stores compressed data.
Definition: avcodec.h:1649
int strict_std_compliance
strictly follow the standard (MPEG-4, ...).
Definition: avcodec.h:2973
static const AVOption options[]
Definition: ljpegenc.c:337
GLuint buffer
Definition: opengl_enc.c:102
int vsample[4]
Definition: ljpegenc.c:50