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1 | /* |
2 | * DPX (.dpx) image decoder | |
3 | * Copyright (c) 2009 Jimmy Christensen | |
4 | * | |
5 | * This file is part of FFmpeg. | |
6 | * | |
7 | * FFmpeg is free software; you can redistribute it and/or | |
8 | * modify it under the terms of the GNU Lesser General Public | |
9 | * License as published by the Free Software Foundation; either | |
10 | * version 2.1 of the License, or (at your option) any later version. | |
11 | * | |
12 | * FFmpeg is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
15 | * Lesser General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU Lesser General Public | |
18 | * License along with FFmpeg; if not, write to the Free Software | |
19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
20 | */ | |
21 | ||
22 | #include "libavutil/intreadwrite.h" | |
23 | #include "libavutil/intfloat.h" | |
24 | #include "libavutil/imgutils.h" | |
25 | #include "bytestream.h" | |
26 | #include "avcodec.h" | |
27 | #include "internal.h" | |
28 | ||
29 | static unsigned int read16(const uint8_t **ptr, int is_big) | |
30 | { | |
31 | unsigned int temp; | |
32 | if (is_big) { | |
33 | temp = AV_RB16(*ptr); | |
34 | } else { | |
35 | temp = AV_RL16(*ptr); | |
36 | } | |
37 | *ptr += 2; | |
38 | return temp; | |
39 | } | |
40 | ||
41 | static unsigned int read32(const uint8_t **ptr, int is_big) | |
42 | { | |
43 | unsigned int temp; | |
44 | if (is_big) { | |
45 | temp = AV_RB32(*ptr); | |
46 | } else { | |
47 | temp = AV_RL32(*ptr); | |
48 | } | |
49 | *ptr += 4; | |
50 | return temp; | |
51 | } | |
52 | ||
53 | static uint16_t read10in32(const uint8_t **ptr, uint32_t * lbuf, | |
54 | int * n_datum, int is_big) | |
55 | { | |
56 | if (*n_datum) | |
57 | (*n_datum)--; | |
58 | else { | |
59 | *lbuf = read32(ptr, is_big); | |
60 | *n_datum = 2; | |
61 | } | |
62 | ||
63 | *lbuf = (*lbuf << 10) | (*lbuf >> 22); | |
64 | ||
65 | return *lbuf & 0x3FF; | |
66 | } | |
67 | ||
68 | static int decode_frame(AVCodecContext *avctx, | |
69 | void *data, | |
70 | int *got_frame, | |
71 | AVPacket *avpkt) | |
72 | { | |
73 | const uint8_t *buf = avpkt->data; | |
74 | int buf_size = avpkt->size; | |
75 | AVFrame *const p = data; | |
76 | uint8_t *ptr[AV_NUM_DATA_POINTERS]; | |
77 | ||
78 | unsigned int offset; | |
79 | int magic_num, endian; | |
80 | int x, y, stride, i, ret; | |
81 | int w, h, bits_per_color, descriptor, elements, packing; | |
82 | int encoding, need_align = 0; | |
83 | ||
84 | unsigned int rgbBuffer = 0; | |
85 | int n_datum = 0; | |
86 | ||
87 | if (avpkt->size <= 1634) { | |
88 | av_log(avctx, AV_LOG_ERROR, "Packet too small for DPX header\n"); | |
89 | return AVERROR_INVALIDDATA; | |
90 | } | |
91 | ||
92 | magic_num = AV_RB32(buf); | |
93 | buf += 4; | |
94 | ||
95 | /* Check if the files "magic number" is "SDPX" which means it uses | |
96 | * big-endian or XPDS which is for little-endian files */ | |
97 | if (magic_num == AV_RL32("SDPX")) { | |
98 | endian = 0; | |
99 | } else if (magic_num == AV_RB32("SDPX")) { | |
100 | endian = 1; | |
101 | } else { | |
102 | av_log(avctx, AV_LOG_ERROR, "DPX marker not found\n"); | |
103 | return AVERROR_INVALIDDATA; | |
104 | } | |
105 | ||
106 | offset = read32(&buf, endian); | |
107 | if (avpkt->size <= offset) { | |
108 | av_log(avctx, AV_LOG_ERROR, "Invalid data start offset\n"); | |
109 | return AVERROR_INVALIDDATA; | |
110 | } | |
111 | ||
112 | // Check encryption | |
113 | buf = avpkt->data + 660; | |
114 | ret = read32(&buf, endian); | |
115 | if (ret != 0xFFFFFFFF) { | |
116 | avpriv_report_missing_feature(avctx, "Encryption"); | |
117 | av_log(avctx, AV_LOG_WARNING, "The image is encrypted and may " | |
118 | "not properly decode.\n"); | |
119 | } | |
120 | ||
121 | // Need to end in 0x304 offset from start of file | |
122 | buf = avpkt->data + 0x304; | |
123 | w = read32(&buf, endian); | |
124 | h = read32(&buf, endian); | |
125 | ||
126 | if ((ret = ff_set_dimensions(avctx, w, h)) < 0) | |
127 | return ret; | |
128 | ||
129 | // Need to end in 0x320 to read the descriptor | |
130 | buf += 20; | |
131 | descriptor = buf[0]; | |
132 | ||
133 | // Need to end in 0x323 to read the bits per color | |
134 | buf += 3; | |
135 | avctx->bits_per_raw_sample = | |
136 | bits_per_color = buf[0]; | |
137 | buf++; | |
138 | packing = read16(&buf, endian); | |
139 | encoding = read16(&buf, endian); | |
140 | ||
141 | if (packing > 1) { | |
142 | avpriv_report_missing_feature(avctx, "Packing %d", packing); | |
143 | return AVERROR_PATCHWELCOME; | |
144 | } | |
145 | if (encoding) { | |
146 | avpriv_report_missing_feature(avctx, "Encoding %d", encoding); | |
147 | return AVERROR_PATCHWELCOME; | |
148 | } | |
149 | ||
150 | buf += 820; | |
151 | avctx->sample_aspect_ratio.num = read32(&buf, endian); | |
152 | avctx->sample_aspect_ratio.den = read32(&buf, endian); | |
153 | if (avctx->sample_aspect_ratio.num > 0 && avctx->sample_aspect_ratio.den > 0) | |
154 | av_reduce(&avctx->sample_aspect_ratio.num, &avctx->sample_aspect_ratio.den, | |
155 | avctx->sample_aspect_ratio.num, avctx->sample_aspect_ratio.den, | |
156 | 0x10000); | |
157 | else | |
158 | avctx->sample_aspect_ratio = (AVRational){ 0, 1 }; | |
159 | ||
160 | if (offset >= 1724 + 4) { | |
161 | buf = avpkt->data + 1724; | |
162 | i = read32(&buf, endian); | |
163 | if(i) { | |
164 | AVRational q = av_d2q(av_int2float(i), 4096); | |
165 | if (q.num > 0 && q.den > 0) | |
f6fa7814 | 166 | avctx->framerate = q; |
2ba45a60 DM |
167 | } |
168 | } | |
169 | ||
170 | switch (descriptor) { | |
171 | case 6: // Y | |
172 | elements = 1; | |
173 | break; | |
174 | case 52: // ABGR | |
175 | case 51: // RGBA | |
176 | elements = 4; | |
177 | break; | |
178 | case 50: // RGB | |
179 | elements = 3; | |
180 | break; | |
181 | default: | |
182 | avpriv_report_missing_feature(avctx, "Descriptor %d", descriptor); | |
183 | return AVERROR_PATCHWELCOME; | |
184 | } | |
185 | ||
186 | switch (bits_per_color) { | |
187 | case 8: | |
188 | stride = avctx->width * elements; | |
189 | break; | |
190 | case 10: | |
191 | if (!packing) { | |
192 | av_log(avctx, AV_LOG_ERROR, "Packing to 32bit required\n"); | |
193 | return -1; | |
194 | } | |
195 | stride = (avctx->width * elements + 2) / 3 * 4; | |
196 | break; | |
197 | case 12: | |
198 | if (!packing) { | |
199 | av_log(avctx, AV_LOG_ERROR, "Packing to 16bit required\n"); | |
200 | return -1; | |
201 | } | |
202 | stride = 2 * avctx->width * elements; | |
203 | break; | |
204 | case 16: | |
205 | stride = 2 * avctx->width * elements; | |
206 | break; | |
207 | case 1: | |
208 | case 32: | |
209 | case 64: | |
210 | avpriv_report_missing_feature(avctx, "Depth %d", bits_per_color); | |
211 | return AVERROR_PATCHWELCOME; | |
212 | default: | |
213 | return AVERROR_INVALIDDATA; | |
214 | } | |
215 | ||
216 | // Table 3c: Runs will always break at scan line boundaries. Packing | |
217 | // will always break to the next 32-bit word at scan-line boundaries. | |
218 | // Unfortunately, the encoder produced invalid files, so attempt | |
219 | // to detect it | |
220 | need_align = FFALIGN(stride, 4); | |
221 | if (need_align*avctx->height + (int64_t)offset > avpkt->size) { | |
222 | // Alignment seems unappliable, try without | |
223 | if (stride*avctx->height + (int64_t)offset > avpkt->size) { | |
224 | av_log(avctx, AV_LOG_ERROR, "Overread buffer. Invalid header?\n"); | |
225 | return AVERROR_INVALIDDATA; | |
226 | } else { | |
227 | av_log(avctx, AV_LOG_INFO, "Decoding DPX without scanline " | |
228 | "alignment.\n"); | |
229 | need_align = 0; | |
230 | } | |
231 | } else { | |
232 | need_align -= stride; | |
233 | stride = FFALIGN(stride, 4); | |
234 | } | |
235 | ||
236 | switch (1000 * descriptor + 10 * bits_per_color + endian) { | |
237 | case 6081: | |
238 | case 6080: | |
239 | avctx->pix_fmt = AV_PIX_FMT_GRAY8; | |
240 | break; | |
241 | case 50081: | |
242 | case 50080: | |
243 | avctx->pix_fmt = AV_PIX_FMT_RGB24; | |
244 | break; | |
245 | case 52081: | |
246 | case 52080: | |
247 | avctx->pix_fmt = AV_PIX_FMT_ABGR; | |
248 | break; | |
249 | case 51081: | |
250 | case 51080: | |
251 | avctx->pix_fmt = AV_PIX_FMT_RGBA; | |
252 | break; | |
253 | case 50100: | |
254 | case 51100: | |
255 | case 50101: | |
256 | case 51101: | |
257 | avctx->pix_fmt = AV_PIX_FMT_GBRP10; | |
258 | break; | |
259 | case 50120: | |
260 | case 51120: | |
261 | case 50121: | |
262 | case 51121: | |
263 | avctx->pix_fmt = AV_PIX_FMT_GBRP12; | |
264 | break; | |
265 | case 6161: | |
266 | avctx->pix_fmt = AV_PIX_FMT_GRAY16BE; | |
267 | break; | |
268 | case 6160: | |
269 | avctx->pix_fmt = AV_PIX_FMT_GRAY16LE; | |
270 | break; | |
271 | case 50161: | |
272 | avctx->pix_fmt = AV_PIX_FMT_RGB48BE; | |
273 | break; | |
274 | case 50160: | |
275 | avctx->pix_fmt = AV_PIX_FMT_RGB48LE; | |
276 | break; | |
277 | case 51161: | |
278 | avctx->pix_fmt = AV_PIX_FMT_RGBA64BE; | |
279 | break; | |
280 | case 51160: | |
281 | avctx->pix_fmt = AV_PIX_FMT_RGBA64LE; | |
282 | break; | |
283 | default: | |
284 | av_log(avctx, AV_LOG_ERROR, "Unsupported format\n"); | |
285 | return AVERROR_PATCHWELCOME; | |
286 | } | |
287 | ||
288 | ff_set_sar(avctx, avctx->sample_aspect_ratio); | |
289 | ||
290 | if ((ret = ff_get_buffer(avctx, p, 0)) < 0) | |
291 | return ret; | |
292 | ||
293 | // Move pointer to offset from start of file | |
294 | buf = avpkt->data + offset; | |
295 | ||
296 | for (i=0; i<AV_NUM_DATA_POINTERS; i++) | |
297 | ptr[i] = p->data[i]; | |
298 | ||
299 | switch (bits_per_color) { | |
300 | case 10: | |
301 | for (x = 0; x < avctx->height; x++) { | |
302 | uint16_t *dst[3] = {(uint16_t*)ptr[0], | |
303 | (uint16_t*)ptr[1], | |
304 | (uint16_t*)ptr[2]}; | |
305 | for (y = 0; y < avctx->width; y++) { | |
306 | *dst[2]++ = read10in32(&buf, &rgbBuffer, | |
307 | &n_datum, endian); | |
308 | *dst[0]++ = read10in32(&buf, &rgbBuffer, | |
309 | &n_datum, endian); | |
310 | *dst[1]++ = read10in32(&buf, &rgbBuffer, | |
311 | &n_datum, endian); | |
312 | // For 10 bit, ignore alpha | |
313 | if (elements == 4) | |
314 | read10in32(&buf, &rgbBuffer, | |
315 | &n_datum, endian); | |
316 | } | |
317 | n_datum = 0; | |
318 | for (i = 0; i < 3; i++) | |
319 | ptr[i] += p->linesize[i]; | |
320 | } | |
321 | break; | |
322 | case 12: | |
323 | for (x = 0; x < avctx->height; x++) { | |
324 | uint16_t *dst[3] = {(uint16_t*)ptr[0], | |
325 | (uint16_t*)ptr[1], | |
326 | (uint16_t*)ptr[2]}; | |
327 | for (y = 0; y < avctx->width; y++) { | |
328 | *dst[2] = read16(&buf, endian) >> 4; | |
329 | dst[2]++; | |
330 | *dst[0] = read16(&buf, endian) >> 4; | |
331 | dst[0]++; | |
332 | *dst[1] = read16(&buf, endian) >> 4; | |
333 | dst[1]++; | |
334 | // For 12 bit, ignore alpha | |
335 | if (elements == 4) | |
336 | buf += 2; | |
337 | // Jump to next aligned position | |
338 | buf += need_align; | |
339 | } | |
340 | for (i = 0; i < 3; i++) | |
341 | ptr[i] += p->linesize[i]; | |
342 | } | |
343 | break; | |
344 | case 16: | |
345 | elements *= 2; | |
346 | case 8: | |
347 | av_image_copy_plane(ptr[0], p->linesize[0], | |
348 | buf, stride, | |
349 | elements * avctx->width, avctx->height); | |
350 | break; | |
351 | } | |
352 | ||
353 | *got_frame = 1; | |
354 | ||
355 | return buf_size; | |
356 | } | |
357 | ||
358 | AVCodec ff_dpx_decoder = { | |
359 | .name = "dpx", | |
360 | .long_name = NULL_IF_CONFIG_SMALL("DPX (Digital Picture Exchange) image"), | |
361 | .type = AVMEDIA_TYPE_VIDEO, | |
362 | .id = AV_CODEC_ID_DPX, | |
363 | .decode = decode_frame, | |
364 | .capabilities = CODEC_CAP_DR1, | |
365 | }; |