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1 | /* | ||
2 | * lossless JPEG shared bits | ||
3 | * Copyright (c) 2000, 2001 Fabrice Bellard | ||
4 | * Copyright (c) 2003 Alex Beregszaszi | ||
5 | * | ||
6 | * This file is part of FFmpeg. | ||
7 | * | ||
8 | * FFmpeg is free software; you can redistribute it and/or | ||
9 | * modify it under the terms of the GNU Lesser General Public | ||
10 | * License as published by the Free Software Foundation; either | ||
11 | * version 2.1 of the License, or (at your option) any later version. | ||
12 | * | ||
13 | * FFmpeg is distributed in the hope that it will be useful, | ||
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
16 | * Lesser General Public License for more details. | ||
17 | * | ||
18 | * You should have received a copy of the GNU Lesser General Public | ||
19 | * License along with FFmpeg; if not, write to the Free Software | ||
20 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | ||
21 | */ | ||
22 | |||
23 | #include <stdint.h> | ||
24 | #include <string.h> | ||
25 | |||
26 | #include "libavutil/pixdesc.h" | ||
27 | #include "libavutil/pixfmt.h" | ||
28 | |||
29 | #include "avcodec.h" | ||
30 | #include "idctdsp.h" | ||
31 | #include "jpegtables.h" | ||
32 | #include "put_bits.h" | ||
33 | #include "mjpegenc.h" | ||
34 | #include "mjpegenc_common.h" | ||
35 | #include "mjpeg.h" | ||
36 | #include "version.h" | ||
37 | |||
38 | /* table_class: 0 = DC coef, 1 = AC coefs */ | ||
39 | 5756 | static int put_huffman_table(PutBitContext *p, int table_class, int table_id, | |
40 | const uint8_t *bits_table, const uint8_t *value_table) | ||
41 | { | ||
42 | int n, i; | ||
43 | |||
44 | 5756 | put_bits(p, 4, table_class); | |
45 | 5756 | put_bits(p, 4, table_id); | |
46 | |||
47 | 5756 | n = 0; | |
48 |
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97852 | for(i=1;i<=16;i++) { |
49 | 92096 | n += bits_table[i]; | |
50 | 92096 | put_bits(p, 8, bits_table[i]); | |
51 | } | ||
52 | |||
53 |
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185043 | for(i=0;i<n;i++) |
54 | 179287 | put_bits(p, 8, value_table[i]); | |
55 | |||
56 | 5756 | return n + 17; | |
57 | } | ||
58 | |||
59 | 1439 | static void jpeg_table_header(AVCodecContext *avctx, PutBitContext *p, | |
60 | MJpegContext *m, | ||
61 | const uint8_t intra_matrix_permutation[64], | ||
62 | uint16_t luma_intra_matrix[64], | ||
63 | uint16_t chroma_intra_matrix[64], | ||
64 | int hsample[3], int use_slices, int matrices_differ) | ||
65 | { | ||
66 | int i, j, size; | ||
67 | uint8_t *ptr; | ||
68 | |||
69 |
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1439 | if (m) { |
70 | 1239 | int matrix_count = 1 + matrices_differ; | |
71 |
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1239 | if (m->force_duplicated_matrix) |
72 | ✗ | matrix_count = 2; | |
73 | /* quant matrixes */ | ||
74 | 1239 | put_marker(p, DQT); | |
75 | 1239 | put_bits(p, 16, 2 + matrix_count * (1 + 64)); | |
76 | 1239 | put_bits(p, 4, 0); /* 8 bit precision */ | |
77 | 1239 | put_bits(p, 4, 0); /* table 0 */ | |
78 |
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80535 | for (int i = 0; i < 64; i++) { |
79 | 79296 | uint8_t j = intra_matrix_permutation[i]; | |
80 | 79296 | put_bits(p, 8, luma_intra_matrix[j]); | |
81 | } | ||
82 | |||
83 |
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1239 | if (matrix_count > 1) { |
84 | ✗ | put_bits(p, 4, 0); /* 8 bit precision */ | |
85 | ✗ | put_bits(p, 4, 1); /* table 1 */ | |
86 | ✗ | for(i=0;i<64;i++) { | |
87 | ✗ | j = intra_matrix_permutation[i]; | |
88 | ✗ | put_bits(p, 8, chroma_intra_matrix[j]); | |
89 | } | ||
90 | } | ||
91 | } | ||
92 | |||
93 |
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1439 | if (use_slices) { |
94 | ✗ | put_marker(p, DRI); | |
95 | ✗ | put_bits(p, 16, 4); | |
96 | ✗ | put_bits(p, 16, (avctx->width-1)/(8*hsample[0]) + 1); | |
97 | } | ||
98 | |||
99 | /* huffman table */ | ||
100 | 1439 | put_marker(p, DHT); | |
101 | 1439 | flush_put_bits(p); | |
102 | 1439 | ptr = put_bits_ptr(p); | |
103 | 1439 | put_bits(p, 16, 0); /* patched later */ | |
104 | 1439 | size = 2; | |
105 | |||
106 | // Only MJPEG can have a variable Huffman variable. All other | ||
107 | // formats use the default Huffman table. | ||
108 |
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1439 | if (m && m->huffman == HUFFMAN_TABLE_OPTIMAL) { |
109 | 2478 | size += put_huffman_table(p, 0, 0, m->bits_dc_luminance, | |
110 | 1239 | m->val_dc_luminance); | |
111 | 2478 | size += put_huffman_table(p, 0, 1, m->bits_dc_chrominance, | |
112 | 1239 | m->val_dc_chrominance); | |
113 | |||
114 | 2478 | size += put_huffman_table(p, 1, 0, m->bits_ac_luminance, | |
115 | 1239 | m->val_ac_luminance); | |
116 | 2478 | size += put_huffman_table(p, 1, 1, m->bits_ac_chrominance, | |
117 | 1239 | m->val_ac_chrominance); | |
118 | } else { | ||
119 | 200 | size += put_huffman_table(p, 0, 0, ff_mjpeg_bits_dc_luminance, | |
120 | ff_mjpeg_val_dc); | ||
121 | 200 | size += put_huffman_table(p, 0, 1, ff_mjpeg_bits_dc_chrominance, | |
122 | ff_mjpeg_val_dc); | ||
123 | |||
124 | 200 | size += put_huffman_table(p, 1, 0, ff_mjpeg_bits_ac_luminance, | |
125 | ff_mjpeg_val_ac_luminance); | ||
126 | 200 | size += put_huffman_table(p, 1, 1, ff_mjpeg_bits_ac_chrominance, | |
127 | ff_mjpeg_val_ac_chrominance); | ||
128 | } | ||
129 | 1439 | AV_WB16(ptr, size); | |
130 | 1439 | } | |
131 | |||
132 | enum { | ||
133 | ICC_HDR_SIZE = 16, /* ICC_PROFILE\0 tag + 4 bytes */ | ||
134 | ICC_CHUNK_SIZE = UINT16_MAX - ICC_HDR_SIZE, | ||
135 | ICC_MAX_CHUNKS = UINT8_MAX, | ||
136 | }; | ||
137 | |||
138 | 1439 | int ff_mjpeg_add_icc_profile_size(AVCodecContext *avctx, const AVFrame *frame, | |
139 | size_t *max_pkt_size) | ||
140 | { | ||
141 | const AVFrameSideData *sd; | ||
142 | size_t new_pkt_size; | ||
143 | int nb_chunks; | ||
144 | 1439 | sd = av_frame_get_side_data(frame, AV_FRAME_DATA_ICC_PROFILE); | |
145 |
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1439 | if (!sd || !sd->size) |
146 | 1438 | return 0; | |
147 | |||
148 |
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1 | if (sd->size > ICC_MAX_CHUNKS * ICC_CHUNK_SIZE) { |
149 | ✗ | av_log(avctx, AV_LOG_ERROR, "Cannot store %"SIZE_SPECIFIER" byte ICC " | |
150 | "profile: too large for JPEG\n", | ||
151 | ✗ | sd->size); | |
152 | ✗ | return AVERROR_INVALIDDATA; | |
153 | } | ||
154 | |||
155 | 1 | nb_chunks = (sd->size + ICC_CHUNK_SIZE - 1) / ICC_CHUNK_SIZE; | |
156 | 1 | new_pkt_size = *max_pkt_size + nb_chunks * (UINT16_MAX + 2 /* APP2 marker */); | |
157 |
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1 | if (new_pkt_size < *max_pkt_size) /* overflow */ |
158 | ✗ | return AVERROR_INVALIDDATA; | |
159 | 1 | *max_pkt_size = new_pkt_size; | |
160 | 1 | return 0; | |
161 | } | ||
162 | |||
163 | 1439 | static void jpeg_put_comments(AVCodecContext *avctx, PutBitContext *p, | |
164 | const AVFrame *frame) | ||
165 | { | ||
166 | 1439 | const AVFrameSideData *sd = NULL; | |
167 | int size; | ||
168 | uint8_t *ptr; | ||
169 | |||
170 |
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1439 | if (avctx->sample_aspect_ratio.num > 0 && avctx->sample_aspect_ratio.den > 0) { |
171 | 1 | AVRational sar = avctx->sample_aspect_ratio; | |
172 | |||
173 |
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1 | if (sar.num > 65535 || sar.den > 65535) { |
174 | ✗ | if (!av_reduce(&sar.num, &sar.den, avctx->sample_aspect_ratio.num, avctx->sample_aspect_ratio.den, 65535)) | |
175 | ✗ | av_log(avctx, AV_LOG_WARNING, | |
176 | "Cannot store exact aspect ratio %d:%d\n", | ||
177 | avctx->sample_aspect_ratio.num, | ||
178 | avctx->sample_aspect_ratio.den); | ||
179 | } | ||
180 | |||
181 | /* JFIF header */ | ||
182 | 1 | put_marker(p, APP0); | |
183 | 1 | put_bits(p, 16, 16); | |
184 | 1 | ff_put_string(p, "JFIF", 1); /* this puts the trailing zero-byte too */ | |
185 | /* The most significant byte is used for major revisions, the least | ||
186 | * significant byte for minor revisions. Version 1.02 is the current | ||
187 | * released revision. */ | ||
188 | 1 | put_bits(p, 16, 0x0102); | |
189 | 1 | put_bits(p, 8, 0); /* units type: 0 - aspect ratio */ | |
190 | 1 | put_bits(p, 16, sar.num); | |
191 | 1 | put_bits(p, 16, sar.den); | |
192 | 1 | put_bits(p, 8, 0); /* thumbnail width */ | |
193 | 1 | put_bits(p, 8, 0); /* thumbnail height */ | |
194 | } | ||
195 | |||
196 | /* ICC profile */ | ||
197 | 1439 | sd = av_frame_get_side_data(frame, AV_FRAME_DATA_ICC_PROFILE); | |
198 |
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1439 | if (sd && sd->size) { |
199 | 1 | const int nb_chunks = (sd->size + ICC_CHUNK_SIZE - 1) / ICC_CHUNK_SIZE; | |
200 | 1 | const uint8_t *data = sd->data; | |
201 | 1 | size_t remaining = sd->size; | |
202 | /* must already be checked by the packat allocation code */ | ||
203 |
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1 | av_assert0(remaining <= ICC_MAX_CHUNKS * ICC_CHUNK_SIZE); |
204 | 1 | flush_put_bits(p); | |
205 |
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2 | for (int i = 0; i < nb_chunks; i++) { |
206 | 1 | size = FFMIN(remaining, ICC_CHUNK_SIZE); | |
207 | av_assert1(size > 0); | ||
208 | 1 | ptr = put_bits_ptr(p); | |
209 | 1 | ptr[0] = 0xff; /* chunk marker, not part of ICC_HDR_SIZE */ | |
210 | 1 | ptr[1] = APP2; | |
211 | 1 | AV_WB16(ptr+2, size + ICC_HDR_SIZE); | |
212 | 1 | AV_WL32(ptr+4, MKTAG('I','C','C','_')); | |
213 | 1 | AV_WL32(ptr+8, MKTAG('P','R','O','F')); | |
214 | 1 | AV_WL32(ptr+12, MKTAG('I','L','E','\0')); | |
215 | 1 | ptr[16] = i+1; | |
216 | 1 | ptr[17] = nb_chunks; | |
217 | 1 | memcpy(&ptr[18], data, size); | |
218 | 1 | skip_put_bytes(p, size + ICC_HDR_SIZE + 2); | |
219 | 1 | remaining -= size; | |
220 | 1 | data += size; | |
221 | } | ||
222 | av_assert1(!remaining); | ||
223 | } | ||
224 | |||
225 | /* comment */ | ||
226 |
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1439 | if (!(avctx->flags & AV_CODEC_FLAG_BITEXACT)) { |
227 | ✗ | put_marker(p, COM); | |
228 | ✗ | flush_put_bits(p); | |
229 | ✗ | ptr = put_bits_ptr(p); | |
230 | ✗ | put_bits(p, 16, 0); /* patched later */ | |
231 | ✗ | ff_put_string(p, LIBAVCODEC_IDENT, 1); | |
232 | ✗ | size = strlen(LIBAVCODEC_IDENT)+3; | |
233 | ✗ | AV_WB16(ptr, size); | |
234 | } | ||
235 | |||
236 |
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1439 | if (((avctx->pix_fmt == AV_PIX_FMT_YUV420P || |
237 |
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1239 | avctx->pix_fmt == AV_PIX_FMT_YUV422P || |
238 |
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1439 | avctx->pix_fmt == AV_PIX_FMT_YUV444P) && avctx->color_range != AVCOL_RANGE_JPEG) |
239 |
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1239 | || avctx->color_range == AVCOL_RANGE_MPEG) { |
240 | 200 | put_marker(p, COM); | |
241 | 200 | flush_put_bits(p); | |
242 | 200 | ptr = put_bits_ptr(p); | |
243 | 200 | put_bits(p, 16, 0); /* patched later */ | |
244 | 200 | ff_put_string(p, "CS=ITU601", 1); | |
245 | 200 | size = strlen("CS=ITU601")+3; | |
246 | 200 | AV_WB16(ptr, size); | |
247 | } | ||
248 | 1439 | } | |
249 | |||
250 | 1643 | void ff_mjpeg_init_hvsample(AVCodecContext *avctx, int hsample[4], int vsample[4]) | |
251 | { | ||
252 |
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1643 | if (avctx->codec_id == AV_CODEC_ID_LJPEG && |
253 |
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204 | ( avctx->pix_fmt == AV_PIX_FMT_BGR0 |
254 |
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204 | || avctx->pix_fmt == AV_PIX_FMT_BGRA |
255 |
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204 | || avctx->pix_fmt == AV_PIX_FMT_BGR24)) { |
256 | ✗ | vsample[0] = hsample[0] = | |
257 | ✗ | vsample[1] = hsample[1] = | |
258 | ✗ | vsample[2] = hsample[2] = | |
259 | ✗ | vsample[3] = hsample[3] = 1; | |
260 |
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1643 | } else if (avctx->pix_fmt == AV_PIX_FMT_YUV444P || avctx->pix_fmt == AV_PIX_FMT_YUVJ444P) { |
261 | 201 | vsample[0] = vsample[1] = vsample[2] = 2; | |
262 | 201 | hsample[0] = hsample[1] = hsample[2] = 1; | |
263 | } else { | ||
264 | int chroma_h_shift, chroma_v_shift; | ||
265 | 1442 | av_pix_fmt_get_chroma_sub_sample(avctx->pix_fmt, &chroma_h_shift, | |
266 | &chroma_v_shift); | ||
267 | 1442 | vsample[0] = 2; | |
268 | 1442 | vsample[1] = 2 >> chroma_v_shift; | |
269 | 1442 | vsample[2] = 2 >> chroma_v_shift; | |
270 | 1442 | hsample[0] = 2; | |
271 | 1442 | hsample[1] = 2 >> chroma_h_shift; | |
272 | 1442 | hsample[2] = 2 >> chroma_h_shift; | |
273 | } | ||
274 | 1643 | } | |
275 | |||
276 | 1639 | void ff_mjpeg_encode_picture_header(AVCodecContext *avctx, PutBitContext *pb, | |
277 | const AVFrame *frame, struct MJpegContext *m, | ||
278 | const uint8_t intra_matrix_permutation[64], int pred, | ||
279 | uint16_t luma_intra_matrix[64], | ||
280 | uint16_t chroma_intra_matrix[64], | ||
281 | int use_slices) | ||
282 | { | ||
283 | 1639 | const int lossless = !m; | |
284 | int hsample[4], vsample[4]; | ||
285 |
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1639 | int components = 3 + (avctx->pix_fmt == AV_PIX_FMT_BGRA); |
286 | int chroma_matrix; | ||
287 | |||
288 | 1639 | ff_mjpeg_init_hvsample(avctx, hsample, vsample); | |
289 | |||
290 | 1639 | put_marker(pb, SOI); | |
291 | |||
292 | // hack for AMV mjpeg format | ||
293 |
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1639 | if (avctx->codec_id == AV_CODEC_ID_AMV) |
294 | 200 | return; | |
295 | |||
296 | 1439 | jpeg_put_comments(avctx, pb, frame); | |
297 | |||
298 |
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1439 | chroma_matrix = !lossless && !!memcmp(luma_intra_matrix, |
299 | chroma_intra_matrix, | ||
300 | sizeof(luma_intra_matrix[0]) * 64); | ||
301 | 1439 | jpeg_table_header(avctx, pb, m, intra_matrix_permutation, | |
302 | luma_intra_matrix, chroma_intra_matrix, hsample, | ||
303 | use_slices, chroma_matrix); | ||
304 | |||
305 |
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1439 | switch (avctx->codec_id) { |
306 | 1239 | case AV_CODEC_ID_MJPEG: put_marker(pb, SOF0 ); break; | |
307 | 200 | case AV_CODEC_ID_LJPEG: put_marker(pb, SOF3 ); break; | |
308 | ✗ | default: av_assert0(0); | |
309 | } | ||
310 | |||
311 | 1439 | put_bits(pb, 16, 8 + 3 * components); | |
312 |
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1439 | if (lossless && ( avctx->pix_fmt == AV_PIX_FMT_BGR0 |
313 |
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200 | || avctx->pix_fmt == AV_PIX_FMT_BGRA |
314 |
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200 | || avctx->pix_fmt == AV_PIX_FMT_BGR24)) |
315 | ✗ | put_bits(pb, 8, 9); /* 9 bits/component RCT */ | |
316 | else | ||
317 | 1439 | put_bits(pb, 8, 8); /* 8 bits/component */ | |
318 | 1439 | put_bits(pb, 16, avctx->height); | |
319 | 1439 | put_bits(pb, 16, avctx->width); | |
320 | 1439 | put_bits(pb, 8, components); /* 3 or 4 components */ | |
321 | |||
322 | /* Y component */ | ||
323 | 1439 | put_bits(pb, 8, 1); /* component number */ | |
324 | 1439 | put_bits(pb, 4, hsample[0]); /* H factor */ | |
325 | 1439 | put_bits(pb, 4, vsample[0]); /* V factor */ | |
326 | 1439 | put_bits(pb, 8, 0); /* select matrix */ | |
327 | |||
328 | /* Cb component */ | ||
329 | 1439 | put_bits(pb, 8, 2); /* component number */ | |
330 | 1439 | put_bits(pb, 4, hsample[1]); /* H factor */ | |
331 | 1439 | put_bits(pb, 4, vsample[1]); /* V factor */ | |
332 |
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1439 | put_bits(pb, 8, lossless ? 0 : chroma_matrix); /* select matrix */ |
333 | |||
334 | /* Cr component */ | ||
335 | 1439 | put_bits(pb, 8, 3); /* component number */ | |
336 | 1439 | put_bits(pb, 4, hsample[2]); /* H factor */ | |
337 | 1439 | put_bits(pb, 4, vsample[2]); /* V factor */ | |
338 |
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1439 | put_bits(pb, 8, lossless ? 0 : chroma_matrix); /* select matrix */ |
339 | |||
340 |
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1439 | if (components == 4) { |
341 | ✗ | put_bits(pb, 8, 4); /* component number */ | |
342 | ✗ | put_bits(pb, 4, hsample[3]); /* H factor */ | |
343 | ✗ | put_bits(pb, 4, vsample[3]); /* V factor */ | |
344 | ✗ | put_bits(pb, 8, 0); /* select matrix */ | |
345 | } | ||
346 | |||
347 | /* scan header */ | ||
348 | 1439 | put_marker(pb, SOS); | |
349 | 1439 | put_bits(pb, 16, 6 + 2*components); /* length */ | |
350 | 1439 | put_bits(pb, 8, components); /* 3 components */ | |
351 | |||
352 | /* Y component */ | ||
353 | 1439 | put_bits(pb, 8, 1); /* index */ | |
354 | 1439 | put_bits(pb, 4, 0); /* DC huffman table index */ | |
355 | 1439 | put_bits(pb, 4, 0); /* AC huffman table index */ | |
356 | |||
357 | /* Cb component */ | ||
358 | 1439 | put_bits(pb, 8, 2); /* index */ | |
359 | 1439 | put_bits(pb, 4, 1); /* DC huffman table index */ | |
360 | 1439 | put_bits(pb, 4, lossless ? 0 : 1); /* AC huffman table index */ | |
361 | |||
362 | /* Cr component */ | ||
363 | 1439 | put_bits(pb, 8, 3); /* index */ | |
364 | 1439 | put_bits(pb, 4, 1); /* DC huffman table index */ | |
365 | 1439 | put_bits(pb, 4, lossless ? 0 : 1); /* AC huffman table index */ | |
366 | |||
367 |
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1439 | if (components == 4) { |
368 | /* Alpha component */ | ||
369 | ✗ | put_bits(pb, 8, 4); /* index */ | |
370 | ✗ | put_bits(pb, 4, 0); /* DC huffman table index */ | |
371 | ✗ | put_bits(pb, 4, 0); /* AC huffman table index */ | |
372 | } | ||
373 | |||
374 | 1439 | put_bits(pb, 8, pred); /* Ss (not used); pred only nonzero for LJPEG */ | |
375 | |||
376 |
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1439 | switch (avctx->codec_id) { |
377 | 1239 | case AV_CODEC_ID_MJPEG: put_bits(pb, 8, 63); break; /* Se (not used) */ | |
378 | 200 | case AV_CODEC_ID_LJPEG: put_bits(pb, 8, 0); break; /* not used */ | |
379 | ✗ | default: av_assert0(0); | |
380 | } | ||
381 | |||
382 | 1439 | put_bits(pb, 8, 0); /* Ah/Al (not used) */ | |
383 | } | ||
384 | |||
385 | 1639 | void ff_mjpeg_escape_FF(PutBitContext *pb, int start) | |
386 | { | ||
387 | int size; | ||
388 | int i, ff_count; | ||
389 | 1639 | uint8_t *buf = pb->buf + start; | |
390 | 1639 | int align= (-(size_t)(buf))&3; | |
391 | 1639 | int pad = (-put_bits_count(pb))&7; | |
392 | |||
393 |
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1639 | if (pad) |
394 | 1420 | put_bits(pb, pad, (1<<pad)-1); | |
395 | |||
396 | 1639 | flush_put_bits(pb); | |
397 | 1639 | size = put_bytes_output(pb) - start; | |
398 | |||
399 | 1639 | ff_count=0; | |
400 |
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4488 | for(i=0; i<size && i<align; i++){ |
401 |
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2849 | if(buf[i]==0xFF) ff_count++; |
402 | } | ||
403 |
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2331745 | for(; i<size-15; i+=16){ |
404 | int acc, v; | ||
405 | |||
406 | 2330106 | v= *(uint32_t*)(&buf[i]); | |
407 | 2330106 | acc= (((v & (v>>4))&0x0F0F0F0F)+0x01010101)&0x10101010; | |
408 | 2330106 | v= *(uint32_t*)(&buf[i+4]); | |
409 | 2330106 | acc+=(((v & (v>>4))&0x0F0F0F0F)+0x01010101)&0x10101010; | |
410 | 2330106 | v= *(uint32_t*)(&buf[i+8]); | |
411 | 2330106 | acc+=(((v & (v>>4))&0x0F0F0F0F)+0x01010101)&0x10101010; | |
412 | 2330106 | v= *(uint32_t*)(&buf[i+12]); | |
413 | 2330106 | acc+=(((v & (v>>4))&0x0F0F0F0F)+0x01010101)&0x10101010; | |
414 | |||
415 | 2330106 | acc>>=4; | |
416 | 2330106 | acc+= (acc>>16); | |
417 | 2330106 | acc+= (acc>>8); | |
418 | 2330106 | ff_count+= acc&0xFF; | |
419 | } | ||
420 |
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13699 | for(; i<size; i++){ |
421 |
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12060 | if(buf[i]==0xFF) ff_count++; |
422 | } | ||
423 | |||
424 |
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1639 | if(ff_count==0) return; |
425 | |||
426 | 1608 | skip_put_bytes(pb, ff_count); | |
427 | |||
428 |
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36528946 | for(i=size-1; ff_count; i--){ |
429 | 36527338 | int v= buf[i]; | |
430 | |||
431 |
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36527338 | if(v==0xFF){ |
432 | 138346 | buf[i+ff_count]= 0; | |
433 | 138346 | ff_count--; | |
434 | } | ||
435 | |||
436 | 36527338 | buf[i+ff_count]= v; | |
437 | } | ||
438 | } | ||
439 | |||
440 | /* isn't this function nicer than the one in the libjpeg ? */ | ||
441 | 5088 | void ff_mjpeg_build_huffman_codes(uint8_t *huff_size, uint16_t *huff_code, | |
442 | const uint8_t *bits_table, | ||
443 | const uint8_t *val_table) | ||
444 | { | ||
445 | int k, code; | ||
446 | |||
447 | 5088 | k = 0; | |
448 | 5088 | code = 0; | |
449 |
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86496 | for (int i = 1; i <= 16; i++) { |
450 | 81408 | int nb = bits_table[i]; | |
451 |
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201979 | for (int j = 0; j < nb; j++) { |
452 | 120571 | int sym = val_table[k++]; | |
453 | 120571 | huff_size[sym] = i; | |
454 | 120571 | huff_code[sym] = code; | |
455 | 120571 | code++; | |
456 | } | ||
457 | 81408 | code <<= 1; | |
458 | } | ||
459 | 5088 | } | |
460 | |||
461 | 1639 | void ff_mjpeg_encode_picture_trailer(PutBitContext *pb, int header_bits) | |
462 | { | ||
463 | av_assert1((header_bits & 7) == 0); | ||
464 | |||
465 | 1639 | put_marker(pb, EOI); | |
466 | 1639 | } | |
467 | |||
468 | 23255400 | void ff_mjpeg_encode_dc(PutBitContext *pb, int val, | |
469 | uint8_t *huff_size, uint16_t *huff_code) | ||
470 | { | ||
471 | int mant, nbits; | ||
472 | |||
473 |
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23255400 | if (val == 0) { |
474 | 2701595 | put_bits(pb, huff_size[0], huff_code[0]); | |
475 | } else { | ||
476 | 20553805 | mant = val; | |
477 |
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20553805 | if (val < 0) { |
478 | 8922845 | val = -val; | |
479 | 8922845 | mant--; | |
480 | } | ||
481 | |||
482 | 20553805 | nbits= av_log2_16bit(val) + 1; | |
483 | |||
484 | 20553805 | put_bits(pb, huff_size[nbits], huff_code[nbits]); | |
485 | |||
486 | 20553805 | put_sbits(pb, nbits, mant); | |
487 | } | ||
488 | 23255400 | } | |
489 | |||
490 | 35 | int ff_mjpeg_encode_check_pix_fmt(AVCodecContext *avctx) | |
491 | { | ||
492 |
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35 | if (avctx->strict_std_compliance > FF_COMPLIANCE_UNOFFICIAL && |
493 |
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27 | avctx->color_range != AVCOL_RANGE_JPEG && |
494 | ✗ | (avctx->pix_fmt == AV_PIX_FMT_YUV420P || | |
495 | ✗ | avctx->pix_fmt == AV_PIX_FMT_YUV422P || | |
496 | ✗ | avctx->pix_fmt == AV_PIX_FMT_YUV444P || | |
497 | ✗ | avctx->color_range == AVCOL_RANGE_MPEG)) { | |
498 | ✗ | av_log(avctx, AV_LOG_ERROR, | |
499 | "Non full-range YUV is non-standard, set strict_std_compliance " | ||
500 | "to at most unofficial to use it.\n"); | ||
501 | ✗ | return AVERROR(EINVAL); | |
502 | } | ||
503 | 35 | return 0; | |
504 | } | ||
505 |