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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 #include "mjpegenc.h"
44 
45 typedef struct LJpegEncContext {
46  AVClass *class;
49  uint16_t matrix[64];
50 
51  int vsample[4];
52  int hsample[4];
53 
54  uint16_t huff_code_dc_luminance[12];
58 
59  uint16_t (*scratch)[4];
60  int pred;
62 
64  const AVFrame *frame)
65 {
66  LJpegEncContext *s = avctx->priv_data;
67  const int width = frame->width;
68  const int height = frame->height;
69  const int linesize = frame->linesize[0];
70  uint16_t (*buffer)[4] = s->scratch;
71  int left[4], top[4], topleft[4];
72  int x, y, i;
73 
74 #if FF_API_PRIVATE_OPT
76  if (avctx->prediction_method)
77  s->pred = avctx->prediction_method + 1;
79 #endif
80 
81  for (i = 0; i < 4; i++)
82  buffer[0][i] = 1 << (9 - 1);
83 
84  for (y = 0; y < height; y++) {
85  const int modified_predictor = y ? s->pred : 1;
86  uint8_t *ptr = frame->data[0] + (linesize * y);
87 
88  if (pb->buf_end - pb->buf - (put_bits_count(pb) >> 3) < width * 4 * 4) {
89  av_log(avctx, AV_LOG_ERROR, "encoded frame too large\n");
90  return -1;
91  }
92 
93  for (i = 0; i < 4; i++)
94  top[i]= left[i]= topleft[i]= buffer[0][i];
95 
96  for (x = 0; x < width; x++) {
97  if(avctx->pix_fmt == AV_PIX_FMT_BGR24){
98  buffer[x][1] = ptr[3 * x + 0] - ptr[3 * x + 1] + 0x100;
99  buffer[x][2] = ptr[3 * x + 2] - ptr[3 * x + 1] + 0x100;
100  buffer[x][0] = (ptr[3 * x + 0] + 2 * ptr[3 * x + 1] + ptr[3 * x + 2]) >> 2;
101  }else{
102  buffer[x][1] = ptr[4 * x + 0] - ptr[4 * x + 1] + 0x100;
103  buffer[x][2] = ptr[4 * x + 2] - ptr[4 * x + 1] + 0x100;
104  buffer[x][0] = (ptr[4 * x + 0] + 2 * ptr[4 * x + 1] + ptr[4 * x + 2]) >> 2;
105  if (avctx->pix_fmt == AV_PIX_FMT_BGRA)
106  buffer[x][3] = ptr[4 * x + 3];
107  }
108 
109  for (i = 0; i < 3 + (avctx->pix_fmt == AV_PIX_FMT_BGRA); i++) {
110  int pred, diff;
111 
112  PREDICT(pred, topleft[i], top[i], left[i], modified_predictor);
113 
114  topleft[i] = top[i];
115  top[i] = buffer[x+1][i];
116 
117  left[i] = buffer[x][i];
118 
119  diff = ((left[i] - pred + 0x100) & 0x1FF) - 0x100;
120 
121  if (i == 0 || i == 3)
123  else
125  }
126  }
127  }
128 
129  return 0;
130 }
131 
133  const AVFrame *frame, int predictor,
134  int mb_x, int mb_y)
135 {
136  int i;
137 
138  if (mb_x == 0 || mb_y == 0) {
139  for (i = 0; i < 3; i++) {
140  uint8_t *ptr;
141  int x, y, h, v, linesize;
142  h = s->hsample[i];
143  v = s->vsample[i];
144  linesize = frame->linesize[i];
145 
146  for (y = 0; y < v; y++) {
147  for (x = 0; x < h; x++) {
148  int pred;
149 
150  ptr = frame->data[i] + (linesize * (v * mb_y + y)) + (h * mb_x + x); //FIXME optimize this crap
151  if (y == 0 && mb_y == 0) {
152  if (x == 0 && mb_x == 0)
153  pred = 128;
154  else
155  pred = ptr[-1];
156  } else {
157  if (x == 0 && mb_x == 0) {
158  pred = ptr[-linesize];
159  } else {
160  PREDICT(pred, ptr[-linesize - 1], ptr[-linesize],
161  ptr[-1], predictor);
162  }
163  }
164 
165  if (i == 0)
166  ff_mjpeg_encode_dc(pb, *ptr - pred, s->huff_size_dc_luminance, s->huff_code_dc_luminance); //FIXME ugly
167  else
169  }
170  }
171  }
172  } else {
173  for (i = 0; i < 3; i++) {
174  uint8_t *ptr;
175  int x, y, h, v, linesize;
176  h = s->hsample[i];
177  v = s->vsample[i];
178  linesize = frame->linesize[i];
179 
180  for (y = 0; y < v; y++) {
181  for (x = 0; x < h; x++) {
182  int pred;
183 
184  ptr = frame->data[i] + (linesize * (v * mb_y + y)) + (h * mb_x + x); //FIXME optimize this crap
185  PREDICT(pred, ptr[-linesize - 1], ptr[-linesize], ptr[-1], predictor);
186 
187  if (i == 0)
188  ff_mjpeg_encode_dc(pb, *ptr - pred, s->huff_size_dc_luminance, s->huff_code_dc_luminance); //FIXME ugly
189  else
191  }
192  }
193  }
194  }
195 }
196 
198  const AVFrame *frame)
199 {
200  LJpegEncContext *s = avctx->priv_data;
201  const int mb_width = (avctx->width + s->hsample[0] - 1) / s->hsample[0];
202  const int mb_height = (avctx->height + s->vsample[0] - 1) / s->vsample[0];
203  int mb_x, mb_y;
204 
205 #if FF_API_PRIVATE_OPT
207  if (avctx->prediction_method)
208  s->pred = avctx->prediction_method + 1;
210 #endif
211 
212  for (mb_y = 0; mb_y < mb_height; mb_y++) {
213  if (pb->buf_end - pb->buf - (put_bits_count(pb) >> 3) <
214  mb_width * 4 * 3 * s->hsample[0] * s->vsample[0]) {
215  av_log(avctx, AV_LOG_ERROR, "encoded frame too large\n");
216  return -1;
217  }
218 
219  for (mb_x = 0; mb_x < mb_width; mb_x++)
220  ljpeg_encode_yuv_mb(s, pb, frame, s->pred, mb_x, mb_y);
221  }
222 
223  return 0;
224 }
225 
227  const AVFrame *pict, int *got_packet)
228 {
229  LJpegEncContext *s = avctx->priv_data;
230  PutBitContext pb;
231  const int width = avctx->width;
232  const int height = avctx->height;
233  const int mb_width = (width + s->hsample[0] - 1) / s->hsample[0];
234  const int mb_height = (height + s->vsample[0] - 1) / s->vsample[0];
235  int max_pkt_size = AV_INPUT_BUFFER_MIN_SIZE;
236  int ret, header_bits;
237 
238  if( avctx->pix_fmt == AV_PIX_FMT_BGR0
239  || avctx->pix_fmt == AV_PIX_FMT_BGR24)
240  max_pkt_size += width * height * 3 * 4;
241  else if(avctx->pix_fmt == AV_PIX_FMT_BGRA)
242  max_pkt_size += width * height * 4 * 4;
243  else {
244  max_pkt_size += mb_width * mb_height * 3 * 4
245  * s->hsample[0] * s->vsample[0];
246  }
247 
248  if ((ret = ff_alloc_packet2(avctx, pkt, max_pkt_size, 0)) < 0)
249  return ret;
250 
251  init_put_bits(&pb, pkt->data, pkt->size);
252 
254  s->pred, s->matrix, s->matrix);
255 
256  header_bits = put_bits_count(&pb);
257 
258  if( avctx->pix_fmt == AV_PIX_FMT_BGR0
259  || avctx->pix_fmt == AV_PIX_FMT_BGRA
260  || avctx->pix_fmt == AV_PIX_FMT_BGR24)
261  ret = ljpeg_encode_bgr(avctx, &pb, pict);
262  else
263  ret = ljpeg_encode_yuv(avctx, &pb, pict);
264  if (ret < 0)
265  return ret;
266 
267  emms_c();
268 
269  ff_mjpeg_escape_FF(&pb, header_bits >> 3);
270  ff_mjpeg_encode_picture_trailer(&pb, header_bits);
271 
272  flush_put_bits(&pb);
273  pkt->size = put_bits_ptr(&pb) - pb.buf;
274  pkt->flags |= AV_PKT_FLAG_KEY;
275  *got_packet = 1;
276 
277  return 0;
278 }
279 
281 {
282  LJpegEncContext *s = avctx->priv_data;
283 
284  av_freep(&s->scratch);
285 
286  return 0;
287 }
288 
290 {
291  LJpegEncContext *s = avctx->priv_data;
292 
293  if ((avctx->pix_fmt == AV_PIX_FMT_YUV420P ||
294  avctx->pix_fmt == AV_PIX_FMT_YUV422P ||
295  avctx->pix_fmt == AV_PIX_FMT_YUV444P ||
296  avctx->color_range == AVCOL_RANGE_MPEG) &&
298  av_log(avctx, AV_LOG_ERROR,
299  "Limited range YUV is non-standard, set strict_std_compliance to "
300  "at least unofficial to use it.\n");
301  return AVERROR(EINVAL);
302  }
303 
304 #if FF_API_CODED_FRAME
307  avctx->coded_frame->key_frame = 1;
309 #endif
310 
311  s->scratch = av_malloc_array(avctx->width + 1, sizeof(*s->scratch));
312  if (!s->scratch)
313  goto fail;
314 
315  ff_idctdsp_init(&s->idsp, avctx);
318 
319  ff_mjpeg_init_hvsample(avctx, s->hsample, s->vsample);
320 
329 
330  return 0;
331 fail:
332  ljpeg_encode_close(avctx);
333  return AVERROR(ENOMEM);
334 }
335 
336 #define OFFSET(x) offsetof(LJpegEncContext, x)
337 #define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
338 static const AVOption options[] = {
339 { "pred", "Prediction method", OFFSET(pred), AV_OPT_TYPE_INT, { .i64 = 1 }, 1, 3, VE, "pred" },
340  { "left", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = 1 }, INT_MIN, INT_MAX, VE, "pred" },
341  { "plane", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = 2 }, INT_MIN, INT_MAX, VE, "pred" },
342  { "median", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = 3 }, INT_MIN, INT_MAX, VE, "pred" },
343 
344  { NULL},
345 };
346 
347 static const AVClass ljpeg_class = {
348  .class_name = "ljpeg",
349  .item_name = av_default_item_name,
350  .option = options,
351  .version = LIBAVUTIL_VERSION_INT,
352 };
353 
355  .name = "ljpeg",
356  .long_name = NULL_IF_CONFIG_SMALL("Lossless JPEG"),
357  .type = AVMEDIA_TYPE_VIDEO,
358  .id = AV_CODEC_ID_LJPEG,
359  .priv_data_size = sizeof(LJpegEncContext),
360  .priv_class = &ljpeg_class,
362  .encode2 = ljpeg_encode_frame,
363  .close = ljpeg_encode_close,
365  .pix_fmts = (const enum AVPixelFormat[]){
370 };
AVCodec ff_ljpeg_encoder
Definition: ljpegenc.c:354
#define NULL
Definition: coverity.c:32
IDCTDSPContext idsp
Definition: ljpegenc.c:47
const char * s
Definition: avisynth_c.h:631
This structure describes decoded (raw) audio or video data.
Definition: frame.h:184
AVOption.
Definition: opt.h:245
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:70
memory handling functions
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:35
MJPEG encoder.
enum AVColorRange color_range
MPEG vs JPEG YUV range.
Definition: avcodec.h:2393
Scantable.
Definition: idctdsp.h:29
int hsample[4]
Definition: ljpegenc.c:52
int size
Definition: avcodec.h:1589
void ff_mjpeg_init_hvsample(AVCodecContext *avctx, int hsample[4], int vsample[4])
static const AVClass ljpeg_class
Definition: ljpegenc.c:347
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:1885
static AVPacket pkt
AVCodec.
Definition: avcodec.h:3552
MJPEG encoder and decoder.
#define AV_CODEC_CAP_INTRA_ONLY
Codec is intra only.
Definition: avcodec.h:1039
uint16_t(* scratch)[4]
Definition: ljpegenc.c:59
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:57
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:1588
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:738
#define av_log(a,...)
#define FF_COMPLIANCE_UNOFFICIAL
Allow unofficial extensions.
Definition: avcodec.h:2878
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
Definition: avcodec.h:1620
#define PREDICT(ret, topleft, top, left, predictor)
Definition: mjpeg.h:118
static void predictor(uint8_t *src, int size)
Definition: exr.c:254
int width
width and height of the video frame
Definition: frame.h:236
#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
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:176
packed BGRA 8:8:8:8, 32bpp, BGRABGRA...
Definition: pixfmt.h:96
uint8_t * buf
Definition: put_bits.h:38
const char * name
Name of the codec implementation.
Definition: avcodec.h:3559
void ff_mjpeg_encode_picture_trailer(PutBitContext *pb, int header_bits)
uint16_t matrix[64]
Definition: ljpegenc.c:49
ScanTable scantable
Definition: ljpegenc.c:48
#define fail()
Definition: checkasm.h:82
#define AV_CODEC_CAP_FRAME_THREADS
Codec supports frame-level multithreading.
Definition: avcodec.h:1019
int flags
A combination of AV_PKT_FLAG values.
Definition: avcodec.h:1594
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:226
enum AVPictureType pict_type
Picture type of the frame.
Definition: frame.h:258
static av_cold int ljpeg_encode_init(AVCodecContext *avctx)
Definition: ljpegenc.c:289
planar YUV 4:2:0, 12bpp, full scale (JPEG), deprecated in favor of AV_PIX_FMT_YUV420P and setting col...
Definition: pixfmt.h:74
#define width
int width
picture width / height.
Definition: avcodec.h:1844
static av_cold int ljpeg_encode_close(AVCodecContext *avctx)
Definition: ljpegenc.c:280
uint16_t huff_code_dc_chrominance[12]
Definition: ljpegenc.c:55
void ff_mjpeg_escape_FF(PutBitContext *pb, int start)
uint8_t idct_permutation[64]
IDCT input permutation.
Definition: idctdsp.h:94
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:336
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:2048
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:215
main external API structure.
Definition: avcodec.h:1657
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:337
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:253
int ff_alloc_packet2(AVCodecContext *avctx, AVPacket *avpkt, int64_t size, int64_t min_size)
Check AVPacket size and/or allocate data.
Definition: utils.c:1690
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:262
static int ljpeg_encode_yuv(AVCodecContext *avctx, PutBitContext *pb, const AVFrame *frame)
Definition: ljpegenc.c:197
static int ljpeg_encode_bgr(AVCodecContext *avctx, PutBitContext *pb, const AVFrame *frame)
Definition: ljpegenc.c:63
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:198
the normal 219*2^(n-8) "MPEG" YUV ranges
Definition: pixfmt.h:458
uint16_t huff_code_dc_luminance[12]
Definition: ljpegenc.c:54
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:80
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:56
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:3078
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:1699
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:132
av_cold void ff_idctdsp_init(IDCTDSPContext *c, AVCodecContext *avctx)
Definition: idctdsp.c:241
#define FF_ENABLE_DEPRECATION_WARNINGS
Definition: internal.h:81
int key_frame
1 -> keyframe, 0-> not
Definition: frame.h:253
int height
Definition: frame.h:236
#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:1565
int strict_std_compliance
strictly follow the standard (MPEG-4, ...).
Definition: avcodec.h:2874
static const AVOption options[]
Definition: ljpegenc.c:338
GLuint buffer
Definition: opengl_enc.c:102
int vsample[4]
Definition: ljpegenc.c:51