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;
46 IDCTDSPContext idsp;
47 ScanTable scantable;
48 uint16_t matrix[64];
49
50 int vsample[4];
51 int hsample[4];
52
53 uint16_t huff_code_dc_luminance[12];
54 uint16_t huff_code_dc_chrominance[12];
55 uint8_t huff_size_dc_luminance[12];
56 uint8_t huff_size_dc_chrominance[12];
57
58 uint16_t (*scratch)[4];
59 int pred;
60 } LJpegEncContext;
61
ljpeg_encode_bgr(AVCodecContext * avctx,PutBitContext * pb,const AVFrame * frame)62 static int ljpeg_encode_bgr(AVCodecContext *avctx, PutBitContext *pb,
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
74 FF_DISABLE_DEPRECATION_WARNINGS
75 if (avctx->prediction_method)
76 s->pred = avctx->prediction_method + 1;
77 FF_ENABLE_DEPRECATION_WARNINGS
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)
121 ff_mjpeg_encode_dc(pb, diff, s->huff_size_dc_luminance, s->huff_code_dc_luminance); //FIXME ugly
122 else
123 ff_mjpeg_encode_dc(pb, diff, s->huff_size_dc_chrominance, s->huff_code_dc_chrominance);
124 }
125 }
126 }
127
128 return 0;
129 }
130
ljpeg_encode_yuv_mb(LJpegEncContext * s,PutBitContext * pb,const AVFrame * frame,int predictor,int mb_x,int mb_y)131 static inline void ljpeg_encode_yuv_mb(LJpegEncContext *s, PutBitContext *pb,
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
167 ff_mjpeg_encode_dc(pb, *ptr - pred, s->huff_size_dc_chrominance, s->huff_code_dc_chrominance);
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
189 ff_mjpeg_encode_dc(pb, *ptr - pred, s->huff_size_dc_chrominance, s->huff_code_dc_chrominance);
190 }
191 }
192 }
193 }
194 }
195
ljpeg_encode_yuv(AVCodecContext * avctx,PutBitContext * pb,const AVFrame * frame)196 static int ljpeg_encode_yuv(AVCodecContext *avctx, PutBitContext *pb,
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
205 FF_DISABLE_DEPRECATION_WARNINGS
206 if (avctx->prediction_method)
207 s->pred = avctx->prediction_method + 1;
208 FF_ENABLE_DEPRECATION_WARNINGS
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
ljpeg_encode_frame(AVCodecContext * avctx,AVPacket * pkt,const AVFrame * pict,int * got_packet)225 static int ljpeg_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
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
252 ff_mjpeg_encode_picture_header(avctx, &pb, &s->scantable,
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
ljpeg_encode_close(AVCodecContext * avctx)279 static av_cold int ljpeg_encode_close(AVCodecContext *avctx)
280 {
281 LJpegEncContext *s = avctx->priv_data;
282
283 av_freep(&s->scratch);
284
285 return 0;
286 }
287
ljpeg_encode_init(AVCodecContext * avctx)288 static av_cold int ljpeg_encode_init(AVCodecContext *avctx)
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) &&
296 avctx->strict_std_compliance > FF_COMPLIANCE_UNOFFICIAL) {
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
304 FF_DISABLE_DEPRECATION_WARNINGS
305 avctx->coded_frame->pict_type = AV_PICTURE_TYPE_I;
306 avctx->coded_frame->key_frame = 1;
307 FF_ENABLE_DEPRECATION_WARNINGS
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);
315 ff_init_scantable(s->idsp.idct_permutation, &s->scantable,
316 ff_zigzag_direct);
317
318 ff_mjpeg_init_hvsample(avctx, s->hsample, s->vsample);
319
320 ff_mjpeg_build_huffman_codes(s->huff_size_dc_luminance,
321 s->huff_code_dc_luminance,
322 avpriv_mjpeg_bits_dc_luminance,
323 avpriv_mjpeg_val_dc);
324 ff_mjpeg_build_huffman_codes(s->huff_size_dc_chrominance,
325 s->huff_code_dc_chrominance,
326 avpriv_mjpeg_bits_dc_chrominance,
327 avpriv_mjpeg_val_dc);
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
353 AVCodec ff_ljpeg_encoder = {
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,
360 .init = ljpeg_encode_init,
361 .encode2 = ljpeg_encode_frame,
362 .close = ljpeg_encode_close,
363 .capabilities = AV_CODEC_CAP_FRAME_THREADS,
364 .pix_fmts = (const enum AVPixelFormat[]){
365 AV_PIX_FMT_BGR24 , AV_PIX_FMT_BGRA , AV_PIX_FMT_BGR0,
366 AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ422P,
367 AV_PIX_FMT_YUV420P , AV_PIX_FMT_YUV444P , AV_PIX_FMT_YUV422P,
368 AV_PIX_FMT_NONE},
369 };
370