Imported Debian version 2.5.0~trusty1.1
[deb_ffmpeg.git] / ffmpeg / libavcodec / ljpegenc.c
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 "mjpegenc_common.h"
41 #include "mpegvideo.h"
42 #include "mjpeg.h"
43 #include "mjpegenc.h"
44
45 typedef struct LJpegEncContext {
46 IDCTDSPContext idsp;
47 ScanTable scantable;
48 uint16_t matrix[64];
49
50 int vsample[3];
51 int hsample[3];
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 } LJpegEncContext;
60
61 static int ljpeg_encode_bgr(AVCodecContext *avctx, PutBitContext *pb,
62 const AVFrame *frame)
63 {
64 LJpegEncContext *s = avctx->priv_data;
65 const int width = frame->width;
66 const int height = frame->height;
67 const int linesize = frame->linesize[0];
68 uint16_t (*buffer)[4] = s->scratch;
69 const int predictor = avctx->prediction_method+1;
70 int left[3], top[3], topleft[3];
71 int x, y, i;
72
73 for (i = 0; i < 3; i++)
74 buffer[0][i] = 1 << (9 - 1);
75
76 for (y = 0; y < height; y++) {
77 const int modified_predictor = y ? predictor : 1;
78 uint8_t *ptr = frame->data[0] + (linesize * y);
79
80 if (pb->buf_end - pb->buf - (put_bits_count(pb) >> 3) < width * 3 * 4) {
81 av_log(avctx, AV_LOG_ERROR, "encoded frame too large\n");
82 return -1;
83 }
84
85 for (i = 0; i < 3; i++)
86 top[i]= left[i]= topleft[i]= buffer[0][i];
87
88 for (x = 0; x < width; x++) {
89 if(avctx->pix_fmt == AV_PIX_FMT_BGR24){
90 buffer[x][1] = ptr[3 * x + 0] - ptr[3 * x + 1] + 0x100;
91 buffer[x][2] = ptr[3 * x + 2] - ptr[3 * x + 1] + 0x100;
92 buffer[x][0] = (ptr[3 * x + 0] + 2 * ptr[3 * x + 1] + ptr[3 * x + 2]) >> 2;
93 }else{
94 buffer[x][1] = ptr[4 * x + 0] - ptr[4 * x + 1] + 0x100;
95 buffer[x][2] = ptr[4 * x + 2] - ptr[4 * x + 1] + 0x100;
96 buffer[x][0] = (ptr[4 * x + 0] + 2 * ptr[4 * x + 1] + ptr[4 * x + 2]) >> 2;
97 }
98
99 for (i = 0; i < 3; i++) {
100 int pred, diff;
101
102 PREDICT(pred, topleft[i], top[i], left[i], modified_predictor);
103
104 topleft[i] = top[i];
105 top[i] = buffer[x+1][i];
106
107 left[i] = buffer[x][i];
108
109 diff = ((left[i] - pred + 0x100) & 0x1FF) - 0x100;
110
111 if (i == 0)
112 ff_mjpeg_encode_dc(pb, diff, s->huff_size_dc_luminance, s->huff_code_dc_luminance); //FIXME ugly
113 else
114 ff_mjpeg_encode_dc(pb, diff, s->huff_size_dc_chrominance, s->huff_code_dc_chrominance);
115 }
116 }
117 }
118
119 return 0;
120 }
121
122 static inline void ljpeg_encode_yuv_mb(LJpegEncContext *s, PutBitContext *pb,
123 const AVFrame *frame, int predictor,
124 int mb_x, int mb_y)
125 {
126 int i;
127
128 if (mb_x == 0 || mb_y == 0) {
129 for (i = 0; i < 3; i++) {
130 uint8_t *ptr;
131 int x, y, h, v, linesize;
132 h = s->hsample[i];
133 v = s->vsample[i];
134 linesize = frame->linesize[i];
135
136 for (y = 0; y < v; y++) {
137 for (x = 0; x < h; x++) {
138 int pred;
139
140 ptr = frame->data[i] + (linesize * (v * mb_y + y)) + (h * mb_x + x); //FIXME optimize this crap
141 if (y == 0 && mb_y == 0) {
142 if (x == 0 && mb_x == 0)
143 pred = 128;
144 else
145 pred = ptr[-1];
146 } else {
147 if (x == 0 && mb_x == 0) {
148 pred = ptr[-linesize];
149 } else {
150 PREDICT(pred, ptr[-linesize - 1], ptr[-linesize],
151 ptr[-1], predictor);
152 }
153 }
154
155 if (i == 0)
156 ff_mjpeg_encode_dc(pb, *ptr - pred, s->huff_size_dc_luminance, s->huff_code_dc_luminance); //FIXME ugly
157 else
158 ff_mjpeg_encode_dc(pb, *ptr - pred, s->huff_size_dc_chrominance, s->huff_code_dc_chrominance);
159 }
160 }
161 }
162 } else {
163 for (i = 0; i < 3; i++) {
164 uint8_t *ptr;
165 int x, y, h, v, linesize;
166 h = s->hsample[i];
167 v = s->vsample[i];
168 linesize = frame->linesize[i];
169
170 for (y = 0; y < v; y++) {
171 for (x = 0; x < h; x++) {
172 int pred;
173
174 ptr = frame->data[i] + (linesize * (v * mb_y + y)) + (h * mb_x + x); //FIXME optimize this crap
175 PREDICT(pred, ptr[-linesize - 1], ptr[-linesize], ptr[-1], predictor);
176
177 if (i == 0)
178 ff_mjpeg_encode_dc(pb, *ptr - pred, s->huff_size_dc_luminance, s->huff_code_dc_luminance); //FIXME ugly
179 else
180 ff_mjpeg_encode_dc(pb, *ptr - pred, s->huff_size_dc_chrominance, s->huff_code_dc_chrominance);
181 }
182 }
183 }
184 }
185 }
186
187 static int ljpeg_encode_yuv(AVCodecContext *avctx, PutBitContext *pb,
188 const AVFrame *frame)
189 {
190 const int predictor = avctx->prediction_method + 1;
191 LJpegEncContext *s = avctx->priv_data;
192 const int mb_width = (avctx->width + s->hsample[0] - 1) / s->hsample[0];
193 const int mb_height = (avctx->height + s->vsample[0] - 1) / s->vsample[0];
194 int mb_x, mb_y;
195
196 for (mb_y = 0; mb_y < mb_height; mb_y++) {
197 if (pb->buf_end - pb->buf - (put_bits_count(pb) >> 3) <
198 mb_width * 4 * 3 * s->hsample[0] * s->vsample[0]) {
199 av_log(avctx, AV_LOG_ERROR, "encoded frame too large\n");
200 return -1;
201 }
202
203 for (mb_x = 0; mb_x < mb_width; mb_x++)
204 ljpeg_encode_yuv_mb(s, pb, frame, predictor, mb_x, mb_y);
205 }
206
207 return 0;
208 }
209
210 static int ljpeg_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
211 const AVFrame *pict, int *got_packet)
212 {
213 LJpegEncContext *s = avctx->priv_data;
214 PutBitContext pb;
215 const int width = avctx->width;
216 const int height = avctx->height;
217 const int mb_width = (width + s->hsample[0] - 1) / s->hsample[0];
218 const int mb_height = (height + s->vsample[0] - 1) / s->vsample[0];
219 int max_pkt_size = FF_MIN_BUFFER_SIZE;
220 int ret, header_bits;
221
222 if( avctx->pix_fmt == AV_PIX_FMT_BGR0
223 || avctx->pix_fmt == AV_PIX_FMT_BGRA
224 || avctx->pix_fmt == AV_PIX_FMT_BGR24)
225 max_pkt_size += width * height * 3 * 4;
226 else {
227 max_pkt_size += mb_width * mb_height * 3 * 4
228 * s->hsample[0] * s->vsample[0];
229 }
230
231 if ((ret = ff_alloc_packet2(avctx, pkt, max_pkt_size)) < 0)
232 return ret;
233
234 init_put_bits(&pb, pkt->data, pkt->size);
235
236 ff_mjpeg_encode_picture_header(avctx, &pb, &s->scantable,
237 s->matrix, s->matrix);
238
239 header_bits = put_bits_count(&pb);
240
241 if( avctx->pix_fmt == AV_PIX_FMT_BGR0
242 || avctx->pix_fmt == AV_PIX_FMT_BGRA
243 || avctx->pix_fmt == AV_PIX_FMT_BGR24)
244 ret = ljpeg_encode_bgr(avctx, &pb, pict);
245 else
246 ret = ljpeg_encode_yuv(avctx, &pb, pict);
247 if (ret < 0)
248 return ret;
249
250 emms_c();
251
252 ff_mjpeg_escape_FF(&pb, header_bits >> 3);
253 ff_mjpeg_encode_picture_trailer(&pb, header_bits);
254
255 flush_put_bits(&pb);
256 pkt->size = put_bits_ptr(&pb) - pb.buf;
257 pkt->flags |= AV_PKT_FLAG_KEY;
258 *got_packet = 1;
259
260 return 0;
261 }
262
263 static av_cold int ljpeg_encode_close(AVCodecContext *avctx)
264 {
265 LJpegEncContext *s = avctx->priv_data;
266
267 av_frame_free(&avctx->coded_frame);
268 av_freep(&s->scratch);
269
270 return 0;
271 }
272
273 static av_cold int ljpeg_encode_init(AVCodecContext *avctx)
274 {
275 LJpegEncContext *s = avctx->priv_data;
276
277 if ((avctx->pix_fmt == AV_PIX_FMT_YUV420P ||
278 avctx->pix_fmt == AV_PIX_FMT_YUV422P ||
279 avctx->pix_fmt == AV_PIX_FMT_YUV444P ||
280 avctx->color_range == AVCOL_RANGE_MPEG) &&
281 avctx->strict_std_compliance > FF_COMPLIANCE_UNOFFICIAL) {
282 av_log(avctx, AV_LOG_ERROR,
283 "Limited range YUV is non-standard, set strict_std_compliance to "
284 "at least unofficial to use it.\n");
285 return AVERROR(EINVAL);
286 }
287
288 avctx->coded_frame = av_frame_alloc();
289 if (!avctx->coded_frame)
290 return AVERROR(ENOMEM);
291
292 avctx->coded_frame->pict_type = AV_PICTURE_TYPE_I;
293 avctx->coded_frame->key_frame = 1;
294
295 s->scratch = av_malloc_array(avctx->width + 1, sizeof(*s->scratch));
296
297 ff_idctdsp_init(&s->idsp, avctx);
298 ff_init_scantable(s->idsp.idct_permutation, &s->scantable,
299 ff_zigzag_direct);
300
301 ff_mjpeg_init_hvsample(avctx, s->hsample, s->vsample);
302
303 ff_mjpeg_build_huffman_codes(s->huff_size_dc_luminance,
304 s->huff_code_dc_luminance,
305 avpriv_mjpeg_bits_dc_luminance,
306 avpriv_mjpeg_val_dc);
307 ff_mjpeg_build_huffman_codes(s->huff_size_dc_chrominance,
308 s->huff_code_dc_chrominance,
309 avpriv_mjpeg_bits_dc_chrominance,
310 avpriv_mjpeg_val_dc);
311
312 return 0;
313 }
314
315 AVCodec ff_ljpeg_encoder = {
316 .name = "ljpeg",
317 .long_name = NULL_IF_CONFIG_SMALL("Lossless JPEG"),
318 .type = AVMEDIA_TYPE_VIDEO,
319 .id = AV_CODEC_ID_LJPEG,
320 .priv_data_size = sizeof(LJpegEncContext),
321 .init = ljpeg_encode_init,
322 .encode2 = ljpeg_encode_frame,
323 .close = ljpeg_encode_close,
324 .capabilities = CODEC_CAP_FRAME_THREADS | CODEC_CAP_INTRA_ONLY,
325 .pix_fmts = (const enum AVPixelFormat[]){
326 AV_PIX_FMT_BGR24 , AV_PIX_FMT_BGRA , AV_PIX_FMT_BGR0,
327 AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ422P,
328 AV_PIX_FMT_YUV420P , AV_PIX_FMT_YUV444P , AV_PIX_FMT_YUV422P,
329 AV_PIX_FMT_NONE},
330 };