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/opt.h"
36 #include "libavutil/pixdesc.h"
37
38 #include "avcodec.h"
39 #include "codec_internal.h"
40 #include "encode.h"
41 #include "idctdsp.h"
42 #include "jpegtables.h"
43 #include "mathops.h"
44 #include "mjpegenc_common.h"
45 #include "mjpeg.h"
46
47 typedef struct LJpegEncContext {
48 AVClass *class;
49 IDCTDSPContext idsp;
50 ScanTable scantable;
51 uint16_t matrix[64];
52
53 int vsample[4];
54 int hsample[4];
55
56 uint16_t huff_code_dc_luminance[12];
57 uint16_t huff_code_dc_chrominance[12];
58 uint8_t huff_size_dc_luminance[12];
59 uint8_t huff_size_dc_chrominance[12];
60
61 uint16_t (*scratch)[4];
62 int pred;
63 } LJpegEncContext;
64
ljpeg_encode_bgr(AVCodecContext * avctx,PutBitContext * pb,const AVFrame * frame)65 static int ljpeg_encode_bgr(AVCodecContext *avctx, PutBitContext *pb,
66 const AVFrame *frame)
67 {
68 LJpegEncContext *s = avctx->priv_data;
69 const int width = frame->width;
70 const int height = frame->height;
71 const int linesize = frame->linesize[0];
72 uint16_t (*buffer)[4] = s->scratch;
73 int left[4], top[4], topleft[4];
74 int x, y, i;
75
76 for (i = 0; i < 4; i++)
77 buffer[0][i] = 1 << (9 - 1);
78
79 for (y = 0; y < height; y++) {
80 const int modified_predictor = y ? s->pred : 1;
81 uint8_t *ptr = frame->data[0] + (linesize * y);
82
83 if (put_bytes_left(pb, 0) < width * 4 * 4) {
84 av_log(avctx, AV_LOG_ERROR, "encoded frame too large\n");
85 return -1;
86 }
87
88 for (i = 0; i < 4; i++)
89 top[i]= left[i]= topleft[i]= buffer[0][i];
90
91 for (x = 0; x < width; x++) {
92 if(avctx->pix_fmt == AV_PIX_FMT_BGR24){
93 buffer[x][1] = ptr[3 * x + 0] - ptr[3 * x + 1] + 0x100;
94 buffer[x][2] = ptr[3 * x + 2] - ptr[3 * x + 1] + 0x100;
95 buffer[x][0] = (ptr[3 * x + 0] + 2 * ptr[3 * x + 1] + ptr[3 * x + 2]) >> 2;
96 }else{
97 buffer[x][1] = ptr[4 * x + 0] - ptr[4 * x + 1] + 0x100;
98 buffer[x][2] = ptr[4 * x + 2] - ptr[4 * x + 1] + 0x100;
99 buffer[x][0] = (ptr[4 * x + 0] + 2 * ptr[4 * x + 1] + ptr[4 * x + 2]) >> 2;
100 if (avctx->pix_fmt == AV_PIX_FMT_BGRA)
101 buffer[x][3] = ptr[4 * x + 3];
102 }
103
104 for (i = 0; i < 3 + (avctx->pix_fmt == AV_PIX_FMT_BGRA); i++) {
105 int pred, diff;
106
107 PREDICT(pred, topleft[i], top[i], left[i], modified_predictor);
108
109 topleft[i] = top[i];
110 top[i] = buffer[x+1][i];
111
112 left[i] = buffer[x][i];
113
114 diff = ((left[i] - pred + 0x100) & 0x1FF) - 0x100;
115
116 if (i == 0 || i == 3)
117 ff_mjpeg_encode_dc(pb, diff, s->huff_size_dc_luminance, s->huff_code_dc_luminance); //FIXME ugly
118 else
119 ff_mjpeg_encode_dc(pb, diff, s->huff_size_dc_chrominance, s->huff_code_dc_chrominance);
120 }
121 }
122 }
123
124 return 0;
125 }
126
ljpeg_encode_yuv_mb(LJpegEncContext * s,PutBitContext * pb,const AVFrame * frame,int predictor,int mb_x,int mb_y)127 static inline void ljpeg_encode_yuv_mb(LJpegEncContext *s, PutBitContext *pb,
128 const AVFrame *frame, int predictor,
129 int mb_x, int mb_y)
130 {
131 int i;
132
133 if (mb_x == 0 || mb_y == 0) {
134 for (i = 0; i < 3; i++) {
135 uint8_t *ptr;
136 int x, y, h, v, linesize;
137 h = s->hsample[i];
138 v = s->vsample[i];
139 linesize = frame->linesize[i];
140
141 for (y = 0; y < v; y++) {
142 for (x = 0; x < h; x++) {
143 int pred;
144
145 ptr = frame->data[i] + (linesize * (v * mb_y + y)) + (h * mb_x + x); //FIXME optimize this crap
146 if (y == 0 && mb_y == 0) {
147 if (x == 0 && mb_x == 0)
148 pred = 128;
149 else
150 pred = ptr[-1];
151 } else {
152 if (x == 0 && mb_x == 0) {
153 pred = ptr[-linesize];
154 } else {
155 PREDICT(pred, ptr[-linesize - 1], ptr[-linesize],
156 ptr[-1], predictor);
157 }
158 }
159
160 if (i == 0)
161 ff_mjpeg_encode_dc(pb, *ptr - pred, s->huff_size_dc_luminance, s->huff_code_dc_luminance); //FIXME ugly
162 else
163 ff_mjpeg_encode_dc(pb, *ptr - pred, s->huff_size_dc_chrominance, s->huff_code_dc_chrominance);
164 }
165 }
166 }
167 } else {
168 for (i = 0; i < 3; i++) {
169 uint8_t *ptr;
170 int x, y, h, v, linesize;
171 h = s->hsample[i];
172 v = s->vsample[i];
173 linesize = frame->linesize[i];
174
175 for (y = 0; y < v; y++) {
176 for (x = 0; x < h; x++) {
177 int pred;
178
179 ptr = frame->data[i] + (linesize * (v * mb_y + y)) + (h * mb_x + x); //FIXME optimize this crap
180 PREDICT(pred, ptr[-linesize - 1], ptr[-linesize], ptr[-1], predictor);
181
182 if (i == 0)
183 ff_mjpeg_encode_dc(pb, *ptr - pred, s->huff_size_dc_luminance, s->huff_code_dc_luminance); //FIXME ugly
184 else
185 ff_mjpeg_encode_dc(pb, *ptr - pred, s->huff_size_dc_chrominance, s->huff_code_dc_chrominance);
186 }
187 }
188 }
189 }
190 }
191
ljpeg_encode_yuv(AVCodecContext * avctx,PutBitContext * pb,const AVFrame * frame)192 static int ljpeg_encode_yuv(AVCodecContext *avctx, PutBitContext *pb,
193 const AVFrame *frame)
194 {
195 LJpegEncContext *s = avctx->priv_data;
196 const int mb_width = (avctx->width + s->hsample[0] - 1) / s->hsample[0];
197 const int mb_height = (avctx->height + s->vsample[0] - 1) / s->vsample[0];
198 int mb_x, mb_y;
199
200 for (mb_y = 0; mb_y < mb_height; mb_y++) {
201 if (put_bytes_left(pb, 0) <
202 mb_width * 4 * 3 * s->hsample[0] * s->vsample[0]) {
203 av_log(avctx, AV_LOG_ERROR, "encoded frame too large\n");
204 return -1;
205 }
206
207 for (mb_x = 0; mb_x < mb_width; mb_x++)
208 ljpeg_encode_yuv_mb(s, pb, frame, s->pred, mb_x, mb_y);
209 }
210
211 return 0;
212 }
213
ljpeg_encode_frame(AVCodecContext * avctx,AVPacket * pkt,const AVFrame * pict,int * got_packet)214 static int ljpeg_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
215 const AVFrame *pict, int *got_packet)
216 {
217 LJpegEncContext *s = avctx->priv_data;
218 PutBitContext pb;
219 const int width = avctx->width;
220 const int height = avctx->height;
221 const int mb_width = (width + s->hsample[0] - 1) / s->hsample[0];
222 const int mb_height = (height + s->vsample[0] - 1) / s->vsample[0];
223 size_t max_pkt_size = AV_INPUT_BUFFER_MIN_SIZE;
224 int ret, header_bits;
225
226 if( avctx->pix_fmt == AV_PIX_FMT_BGR0
227 || avctx->pix_fmt == AV_PIX_FMT_BGR24)
228 max_pkt_size += width * height * 3 * 4;
229 else if(avctx->pix_fmt == AV_PIX_FMT_BGRA)
230 max_pkt_size += width * height * 4 * 4;
231 else {
232 max_pkt_size += mb_width * mb_height * 3 * 4
233 * s->hsample[0] * s->vsample[0];
234 }
235
236 if ((ret = ff_mjpeg_add_icc_profile_size(avctx, pict, &max_pkt_size)) < 0)
237 return ret;
238 if ((ret = ff_alloc_packet(avctx, pkt, max_pkt_size)) < 0)
239 return ret;
240
241 init_put_bits(&pb, pkt->data, pkt->size);
242
243 ff_mjpeg_encode_picture_header(avctx, &pb, pict, NULL, &s->scantable,
244 s->pred, s->matrix, s->matrix, 0);
245
246 header_bits = put_bits_count(&pb);
247
248 if( avctx->pix_fmt == AV_PIX_FMT_BGR0
249 || avctx->pix_fmt == AV_PIX_FMT_BGRA
250 || avctx->pix_fmt == AV_PIX_FMT_BGR24)
251 ret = ljpeg_encode_bgr(avctx, &pb, pict);
252 else
253 ret = ljpeg_encode_yuv(avctx, &pb, pict);
254 if (ret < 0)
255 return ret;
256
257 emms_c();
258
259 ff_mjpeg_escape_FF(&pb, header_bits >> 3);
260 ff_mjpeg_encode_picture_trailer(&pb, header_bits);
261
262 flush_put_bits(&pb);
263 pkt->size = put_bits_ptr(&pb) - pb.buf;
264 *got_packet = 1;
265
266 return 0;
267 }
268
ljpeg_encode_close(AVCodecContext * avctx)269 static av_cold int ljpeg_encode_close(AVCodecContext *avctx)
270 {
271 LJpegEncContext *s = avctx->priv_data;
272
273 av_freep(&s->scratch);
274
275 return 0;
276 }
277
ljpeg_encode_init(AVCodecContext * avctx)278 static av_cold int ljpeg_encode_init(AVCodecContext *avctx)
279 {
280 int ret = ff_mjpeg_encode_check_pix_fmt(avctx);
281 LJpegEncContext *s = avctx->priv_data;
282
283 if (ret < 0)
284 return ret;
285
286 s->scratch = av_malloc_array(avctx->width + 1, sizeof(*s->scratch));
287 if (!s->scratch)
288 return AVERROR(ENOMEM);
289
290 ff_idctdsp_init(&s->idsp, avctx);
291 ff_init_scantable(s->idsp.idct_permutation, &s->scantable,
292 ff_zigzag_direct);
293
294 ff_mjpeg_init_hvsample(avctx, s->hsample, s->vsample);
295
296 ff_mjpeg_build_huffman_codes(s->huff_size_dc_luminance,
297 s->huff_code_dc_luminance,
298 ff_mjpeg_bits_dc_luminance,
299 ff_mjpeg_val_dc);
300 ff_mjpeg_build_huffman_codes(s->huff_size_dc_chrominance,
301 s->huff_code_dc_chrominance,
302 ff_mjpeg_bits_dc_chrominance,
303 ff_mjpeg_val_dc);
304
305 return 0;
306 }
307
308 #define OFFSET(x) offsetof(LJpegEncContext, x)
309 #define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
310 static const AVOption options[] = {
311 { "pred", "Prediction method", OFFSET(pred), AV_OPT_TYPE_INT, { .i64 = 1 }, 1, 3, VE, "pred" },
312 { "left", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = 1 }, INT_MIN, INT_MAX, VE, "pred" },
313 { "plane", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = 2 }, INT_MIN, INT_MAX, VE, "pred" },
314 { "median", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = 3 }, INT_MIN, INT_MAX, VE, "pred" },
315
316 { NULL},
317 };
318
319 static const AVClass ljpeg_class = {
320 .class_name = "ljpeg",
321 .item_name = av_default_item_name,
322 .option = options,
323 .version = LIBAVUTIL_VERSION_INT,
324 };
325
326 const FFCodec ff_ljpeg_encoder = {
327 .p.name = "ljpeg",
328 .p.long_name = NULL_IF_CONFIG_SMALL("Lossless JPEG"),
329 .p.type = AVMEDIA_TYPE_VIDEO,
330 .p.id = AV_CODEC_ID_LJPEG,
331 .priv_data_size = sizeof(LJpegEncContext),
332 .p.priv_class = &ljpeg_class,
333 .init = ljpeg_encode_init,
334 FF_CODEC_ENCODE_CB(ljpeg_encode_frame),
335 .close = ljpeg_encode_close,
336 .p.capabilities = AV_CODEC_CAP_FRAME_THREADS,
337 .p.pix_fmts = (const enum AVPixelFormat[]){
338 AV_PIX_FMT_BGR24 , AV_PIX_FMT_BGRA , AV_PIX_FMT_BGR0,
339 AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ422P,
340 AV_PIX_FMT_YUV420P , AV_PIX_FMT_YUV444P , AV_PIX_FMT_YUV422P,
341 AV_PIX_FMT_NONE},
342 .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,
343 };
344