FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavcodec/cri.c
Date: 2021-09-26 18:22:30
Exec Total Coverage
Lines: 0 270 0.0%
Branches: 0 147 0.0%

Line Branch Exec Source
1 /*
2 * CRI image decoder
3 *
4 * Copyright (c) 2020 Paul B Mahol
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 /**
24 * @file
25 * Cintel RAW image decoder
26 */
27
28 #define BITSTREAM_READER_LE
29
30 #include "libavutil/intfloat.h"
31 #include "libavutil/display.h"
32 #include "avcodec.h"
33 #include "bytestream.h"
34 #include "get_bits.h"
35 #include "internal.h"
36 #include "thread.h"
37
38 typedef struct CRIContext {
39 AVCodecContext *jpeg_avctx; // wrapper context for MJPEG
40 AVPacket *jpkt; // encoded JPEG tile
41 AVFrame *jpgframe; // decoded JPEG tile
42
43 GetByteContext gb;
44 int color_model;
45 const uint8_t *data;
46 unsigned data_size;
47 uint64_t tile_size[4];
48 } CRIContext;
49
50 static av_cold int cri_decode_init(AVCodecContext *avctx)
51 {
52 CRIContext *s = avctx->priv_data;
53 const AVCodec *codec;
54 int ret;
55
56 s->jpgframe = av_frame_alloc();
57 if (!s->jpgframe)
58 return AVERROR(ENOMEM);
59
60 s->jpkt = av_packet_alloc();
61 if (!s->jpkt)
62 return AVERROR(ENOMEM);
63
64 codec = avcodec_find_decoder(AV_CODEC_ID_MJPEG);
65 if (!codec)
66 return AVERROR_BUG;
67 s->jpeg_avctx = avcodec_alloc_context3(codec);
68 if (!s->jpeg_avctx)
69 return AVERROR(ENOMEM);
70 s->jpeg_avctx->flags = avctx->flags;
71 s->jpeg_avctx->flags2 = avctx->flags2;
72 s->jpeg_avctx->dct_algo = avctx->dct_algo;
73 s->jpeg_avctx->idct_algo = avctx->idct_algo;
74 ret = avcodec_open2(s->jpeg_avctx, codec, NULL);
75 if (ret < 0)
76 return ret;
77
78 return 0;
79 }
80
81 static void unpack_10bit(GetByteContext *gb, uint16_t *dst, int shift,
82 int w, int h, ptrdiff_t stride)
83 {
84 int count = w * h;
85 int pos = 0;
86
87 while (count > 0) {
88 uint32_t a0, a1, a2, a3;
89 if (bytestream2_get_bytes_left(gb) < 4)
90 break;
91 a0 = bytestream2_get_le32(gb);
92 a1 = bytestream2_get_le32(gb);
93 a2 = bytestream2_get_le32(gb);
94 a3 = bytestream2_get_le32(gb);
95 dst[pos] = (((a0 >> 1) & 0xE00) | (a0 & 0x1FF)) << shift;
96 pos++;
97 if (pos >= w) {
98 if (count == 1)
99 break;
100 dst += stride;
101 pos = 0;
102 }
103 dst[pos] = (((a0 >> 13) & 0x3F) | ((a0 >> 14) & 0xFC0)) << shift;
104 pos++;
105 if (pos >= w) {
106 if (count == 2)
107 break;
108 dst += stride;
109 pos = 0;
110 }
111 dst[pos] = (((a0 >> 26) & 7) | ((a1 & 0x1FF) << 3)) << shift;
112 pos++;
113 if (pos >= w) {
114 if (count == 3)
115 break;
116 dst += stride;
117 pos = 0;
118 }
119 dst[pos] = (((a1 >> 10) & 0x1FF) | ((a1 >> 11) & 0xE00)) << shift;
120 pos++;
121 if (pos >= w) {
122 if (count == 4)
123 break;
124 dst += stride;
125 pos = 0;
126 }
127 dst[pos] = (((a1 >> 23) & 0x3F) | ((a2 & 0x3F) << 6)) << shift;
128 pos++;
129 if (pos >= w) {
130 if (count == 5)
131 break;
132 dst += stride;
133 pos = 0;
134 }
135 dst[pos] = (((a2 >> 7) & 0xFF8) | ((a2 >> 6) & 7)) << shift;
136 pos++;
137 if (pos >= w) {
138 if (count == 6)
139 break;
140 dst += stride;
141 pos = 0;
142 }
143 dst[pos] = (((a3 & 7) << 9) | ((a2 >> 20) & 0x1FF)) << shift;
144 pos++;
145 if (pos >= w) {
146 if (count == 7)
147 break;
148 dst += stride;
149 pos = 0;
150 }
151 dst[pos] = (((a3 >> 4) & 0xFC0) | ((a3 >> 3) & 0x3F)) << shift;
152 pos++;
153 if (pos >= w) {
154 if (count == 8)
155 break;
156 dst += stride;
157 pos = 0;
158 }
159 dst[pos] = (((a3 >> 16) & 7) | ((a3 >> 17) & 0xFF8)) << shift;
160 pos++;
161 if (pos >= w) {
162 if (count == 9)
163 break;
164 dst += stride;
165 pos = 0;
166 }
167
168 count -= 9;
169 }
170 }
171
172 static int cri_decode_frame(AVCodecContext *avctx, void *data,
173 int *got_frame, AVPacket *avpkt)
174 {
175 CRIContext *s = avctx->priv_data;
176 GetByteContext *gb = &s->gb;
177 ThreadFrame frame = { .f = data };
178 int ret, bps, hflip = 0, vflip = 0;
179 AVFrameSideData *rotation;
180 int compressed = 0;
181 AVFrame *p = data;
182
183 s->data = NULL;
184 s->data_size = 0;
185
186 bytestream2_init(gb, avpkt->data, avpkt->size);
187
188 while (bytestream2_get_bytes_left(gb) > 8) {
189 char codec_name[1024];
190 uint32_t key, length;
191 float framerate;
192 int width, height;
193
194 key = bytestream2_get_le32(gb);
195 length = bytestream2_get_le32(gb);
196
197 switch (key) {
198 case 1:
199 if (length != 4)
200 return AVERROR_INVALIDDATA;
201
202 if (bytestream2_get_le32(gb) != MKTAG('D', 'V', 'C', 'C'))
203 return AVERROR_INVALIDDATA;
204 break;
205 case 100:
206 if (length < 16)
207 return AVERROR_INVALIDDATA;
208 width = bytestream2_get_le32(gb);
209 height = bytestream2_get_le32(gb);
210 s->color_model = bytestream2_get_le32(gb);
211 if (bytestream2_get_le32(gb) != 1)
212 return AVERROR_INVALIDDATA;
213 ret = ff_set_dimensions(avctx, width, height);
214 if (ret < 0)
215 return ret;
216 length -= 16;
217 goto skip;
218 case 101:
219 if (length != 4)
220 return AVERROR_INVALIDDATA;
221
222 if (bytestream2_get_le32(gb) != 0)
223 return AVERROR_INVALIDDATA;
224 break;
225 case 102:
226 bytestream2_get_buffer(gb, codec_name, FFMIN(length, sizeof(codec_name) - 1));
227 length -= FFMIN(length, sizeof(codec_name) - 1);
228 if (strncmp(codec_name, "cintel_craw", FFMIN(length, sizeof(codec_name) - 1)))
229 return AVERROR_INVALIDDATA;
230 compressed = 1;
231 goto skip;
232 case 103:
233 if (bytestream2_get_bytes_left(gb) < length)
234 return AVERROR_INVALIDDATA;
235 s->data = gb->buffer;
236 s->data_size = length;
237 goto skip;
238 case 105:
239 hflip = bytestream2_get_byte(gb) != 0;
240 length--;
241 goto skip;
242 case 106:
243 vflip = bytestream2_get_byte(gb) != 0;
244 length--;
245 goto skip;
246 case 107:
247 if (length != 4)
248 return AVERROR_INVALIDDATA;
249 framerate = av_int2float(bytestream2_get_le32(gb));
250 avctx->framerate.num = framerate * 1000;
251 avctx->framerate.den = 1000;
252 break;
253 case 119:
254 if (length != 32)
255 return AVERROR_INVALIDDATA;
256
257 for (int i = 0; i < 4; i++)
258 s->tile_size[i] = bytestream2_get_le64(gb);
259 break;
260 default:
261 av_log(avctx, AV_LOG_DEBUG, "skipping unknown key %u of length %u\n", key, length);
262 skip:
263 bytestream2_skip(gb, length);
264 }
265 }
266
267 switch (s->color_model) {
268 case 76:
269 case 88:
270 avctx->pix_fmt = AV_PIX_FMT_BAYER_BGGR16;
271 break;
272 case 77:
273 case 89:
274 avctx->pix_fmt = AV_PIX_FMT_BAYER_GBRG16;
275 break;
276 case 78:
277 case 90:
278 avctx->pix_fmt = AV_PIX_FMT_BAYER_RGGB16;
279 break;
280 case 45:
281 case 79:
282 case 91:
283 avctx->pix_fmt = AV_PIX_FMT_BAYER_GRBG16;
284 break;
285 }
286
287 switch (s->color_model) {
288 case 45:
289 bps = 10;
290 break;
291 case 76:
292 case 77:
293 case 78:
294 case 79:
295 bps = 12;
296 break;
297 case 88:
298 case 89:
299 case 90:
300 case 91:
301 bps = 16;
302 break;
303 default:
304 return AVERROR_INVALIDDATA;
305 }
306
307 if (compressed) {
308 for (int i = 0; i < 4; i++) {
309 if (s->tile_size[i] >= s->data_size)
310 return AVERROR_INVALIDDATA;
311 }
312
313 if (s->tile_size[0] + s->tile_size[1] + s->tile_size[2] + s->tile_size[3] !=
314 s->data_size)
315 return AVERROR_INVALIDDATA;
316 }
317
318 if (!s->data || !s->data_size)
319 return AVERROR_INVALIDDATA;
320
321 if ((ret = ff_thread_get_buffer(avctx, &frame, 0)) < 0)
322 return ret;
323
324 avctx->bits_per_raw_sample = bps;
325
326 if (!compressed && s->color_model == 45) {
327 uint16_t *dst = (uint16_t *)p->data[0];
328 GetByteContext gb;
329
330 bytestream2_init(&gb, s->data, s->data_size);
331 unpack_10bit(&gb, dst, 4, avctx->width, avctx->height, p->linesize[0] / 2);
332 } else if (!compressed) {
333 GetBitContext gbit;
334 const int shift = 16 - bps;
335
336 ret = init_get_bits8(&gbit, s->data, s->data_size);
337 if (ret < 0)
338 return ret;
339
340 for (int y = 0; y < avctx->height; y++) {
341 uint16_t *dst = (uint16_t *)(p->data[0] + y * p->linesize[0]);
342
343 if (get_bits_left(&gbit) < avctx->width * bps)
344 break;
345
346 for (int x = 0; x < avctx->width; x++)
347 dst[x] = get_bits(&gbit, bps) << shift;
348 }
349 } else {
350 unsigned offset = 0;
351
352 for (int tile = 0; tile < 4; tile++) {
353 av_packet_unref(s->jpkt);
354 s->jpkt->data = (uint8_t *)s->data + offset;
355 s->jpkt->size = s->tile_size[tile];
356
357 ret = avcodec_send_packet(s->jpeg_avctx, s->jpkt);
358 if (ret < 0) {
359 av_log(avctx, AV_LOG_ERROR, "Error submitting a packet for decoding\n");
360 return ret;
361 }
362
363 ret = avcodec_receive_frame(s->jpeg_avctx, s->jpgframe);
364 if (ret < 0 || s->jpgframe->format != AV_PIX_FMT_GRAY16 ||
365 s->jpeg_avctx->width * 2 != avctx->width ||
366 s->jpeg_avctx->height * 2 != avctx->height) {
367 if (ret < 0) {
368 av_log(avctx, AV_LOG_ERROR,
369 "JPEG decoding error (%d).\n", ret);
370 } else {
371 av_log(avctx, AV_LOG_ERROR,
372 "JPEG invalid format.\n");
373 ret = AVERROR_INVALIDDATA;
374 }
375
376 /* Normally skip, if error explode */
377 if (avctx->err_recognition & AV_EF_EXPLODE)
378 return ret;
379 else
380 return 0;
381 }
382
383 for (int y = 0; y < s->jpeg_avctx->height; y++) {
384 const int hw = s->jpgframe->width / 2;
385 uint16_t *dst = (uint16_t *)(p->data[0] + (y * 2) * p->linesize[0] + tile * hw * 2);
386 const uint16_t *src = (const uint16_t *)(s->jpgframe->data[0] + y * s->jpgframe->linesize[0]);
387
388 memcpy(dst, src, hw * 2);
389 src += hw;
390 dst += p->linesize[0] / 2;
391 memcpy(dst, src, hw * 2);
392 }
393
394 av_frame_unref(s->jpgframe);
395 offset += s->tile_size[tile];
396 }
397 }
398
399 if (hflip || vflip) {
400 rotation = av_frame_new_side_data(p, AV_FRAME_DATA_DISPLAYMATRIX,
401 sizeof(int32_t) * 9);
402 if (rotation) {
403 av_display_rotation_set((int32_t *)rotation->data, 0.f);
404 av_display_matrix_flip((int32_t *)rotation->data, hflip, vflip);
405 }
406 }
407
408 p->pict_type = AV_PICTURE_TYPE_I;
409 p->key_frame = 1;
410
411 *got_frame = 1;
412
413 return 0;
414 }
415
416 static av_cold int cri_decode_close(AVCodecContext *avctx)
417 {
418 CRIContext *s = avctx->priv_data;
419
420 av_frame_free(&s->jpgframe);
421 av_packet_free(&s->jpkt);
422 avcodec_free_context(&s->jpeg_avctx);
423
424 return 0;
425 }
426
427 const AVCodec ff_cri_decoder = {
428 .name = "cri",
429 .type = AVMEDIA_TYPE_VIDEO,
430 .id = AV_CODEC_ID_CRI,
431 .priv_data_size = sizeof(CRIContext),
432 .init = cri_decode_init,
433 .decode = cri_decode_frame,
434 .close = cri_decode_close,
435 .capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_FRAME_THREADS,
436 .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE | FF_CODEC_CAP_INIT_CLEANUP,
437 .long_name = NULL_IF_CONFIG_SMALL("Cintel RAW"),
438 };
439