FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavcodec/exrenc.c
Date: 2025-12-07 22:02:57
Exec Total Coverage
Lines: 237 289 82.0%
Functions: 8 8 100.0%
Branches: 83 128 64.8%
Line Branch Exec Source
1 /*
2 * Copyright (c) 2021 Paul B Mahol
3 *
4 * This file is part of FFmpeg.
5 *
6 * FFmpeg is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
10 *
11 * FFmpeg is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with FFmpeg; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19 */
20
21 /**
22 * @file
23 * OpenEXR encoder
24 */
25
26 #include <float.h>
27 #include <zlib.h>
28
29 #include "libavutil/avassert.h"
30 #include "libavutil/intfloat.h"
31 #include "libavutil/mem.h"
32 #include "libavutil/opt.h"
33 #include "libavutil/imgutils.h"
34 #include "libavutil/float2half.h"
35 #include "avcodec.h"
36 #include "bytestream.h"
37 #include "codec_internal.h"
38 #include "encode.h"
39
40 enum ExrCompr {
41 EXR_RAW,
42 EXR_RLE,
43 EXR_ZIP1,
44 EXR_ZIP16,
45 EXR_NBCOMPR,
46 };
47
48 enum ExrPixelType {
49 EXR_UINT,
50 EXR_HALF,
51 EXR_FLOAT,
52 EXR_UNKNOWN,
53 };
54
55 static const char abgr_chlist[4] = { 'A', 'B', 'G', 'R' };
56 static const char bgr_chlist[4] = { 'B', 'G', 'R', 'A' };
57 static const char y_chlist[4] = { 'Y' };
58 static const uint8_t gbra_order[4] = { 3, 1, 0, 2 };
59 static const uint8_t gbr_order[4] = { 1, 0, 2, 0 };
60 static const uint8_t y_order[4] = { 0 };
61
62 typedef struct EXRScanlineData {
63 uint8_t *compressed_data;
64 unsigned int compressed_size;
65
66 uint8_t *uncompressed_data;
67 unsigned int uncompressed_size;
68
69 uint8_t *tmp;
70 unsigned int tmp_size;
71
72 int64_t actual_size;
73 } EXRScanlineData;
74
75 typedef struct EXRContext {
76 const AVClass *class;
77
78 int compression;
79 int pixel_type;
80 int planes;
81 int nb_scanlines;
82 int scanline_height;
83 float gamma;
84 const char *ch_names;
85 const uint8_t *ch_order;
86 PutByteContext pb;
87
88 EXRScanlineData *scanline;
89
90 Float2HalfTables f2h_tables;
91 } EXRContext;
92
93 12 static av_cold int encode_init(AVCodecContext *avctx)
94 {
95 12 EXRContext *s = avctx->priv_data;
96
97 12 ff_init_float2half_tables(&s->f2h_tables);
98
99
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 12 switch (avctx->pix_fmt) {
100 4 case AV_PIX_FMT_GBRPF32:
101 4 s->planes = 3;
102 4 s->ch_names = bgr_chlist;
103 4 s->ch_order = gbr_order;
104 4 break;
105 4 case AV_PIX_FMT_GBRAPF32:
106 4 s->planes = 4;
107 4 s->ch_names = abgr_chlist;
108 4 s->ch_order = gbra_order;
109 4 break;
110 4 case AV_PIX_FMT_GRAYF32:
111 4 s->planes = 1;
112 4 s->ch_names = y_chlist;
113 4 s->ch_order = y_order;
114 4 break;
115 ✗ default:
116 ✗ av_assert0(0);
117 }
118
119
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 12 switch (s->compression) {
120 9 case EXR_RAW:
121 case EXR_RLE:
122 case EXR_ZIP1:
123 9 s->scanline_height = 1;
124 9 s->nb_scanlines = avctx->height;
125 9 break;
126 3 case EXR_ZIP16:
127 3 s->scanline_height = 16;
128 3 s->nb_scanlines = (avctx->height + s->scanline_height - 1) / s->scanline_height;
129 3 break;
130 ✗ default:
131 ✗ av_assert0(0);
132 }
133
134 12 s->scanline = av_calloc(s->nb_scanlines, sizeof(*s->scanline));
135
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 12 if (!s->scanline)
136 ✗ return AVERROR(ENOMEM);
137
138 12 return 0;
139 }
140
141 12 static av_cold int encode_close(AVCodecContext *avctx)
142 {
143 12 EXRContext *s = avctx->priv_data;
144
145
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 2658 for (int y = 0; y < s->nb_scanlines && s->scanline; y++) {
146 2646 EXRScanlineData *scanline = &s->scanline[y];
147
148 2646 av_freep(&scanline->tmp);
149 2646 av_freep(&scanline->compressed_data);
150 2646 av_freep(&scanline->uncompressed_data);
151 }
152
153 12 av_freep(&s->scanline);
154
155 12 return 0;
156 }
157
158 23166 static void reorder_pixels(uint8_t *dst, const uint8_t *src, ptrdiff_t size)
159 {
160 23166 const ptrdiff_t half_size = (size + 1) / 2;
161 23166 uint8_t *t1 = dst;
162 23166 uint8_t *t2 = dst + half_size;
163
164
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 63281790 for (ptrdiff_t i = 0; i < half_size; i++) {
165 63258624 t1[i] = *(src++);
166 63258624 t2[i] = *(src++);
167 }
168 23166 }
169
170 23166 static void predictor(uint8_t *src, ptrdiff_t size)
171 {
172 23166 int p = src[0];
173
174
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 126517248 for (ptrdiff_t i = 1; i < size; i++) {
175 126494082 int d = src[i] - p + 384;
176
177 126494082 p = src[i];
178 126494082 src[i] = d;
179 }
180 23166 }
181
182 11232 static int64_t rle_compress(uint8_t *out, int64_t out_size,
183 const uint8_t *in, int64_t in_size)
184 {
185 11232 int64_t i = 0, o = 0, run = 1, copy = 0;
186
187
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 1115259 while (i < in_size) {
188
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 4699450 while (i + run < in_size && in[i] == in[i + run] && run < 128)
189 3595351 run++;
190
191
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 1104099 if (run >= 3) {
192
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 106157 if (o + 2 >= out_size)
193 ✗ return -1;
194 106157 out[o++] = run - 1;
195 106157 out[o++] = in[i];
196 106157 i += run;
197 } else {
198
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 997942 if (i + run < in_size)
199 780024 copy += run;
200
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 38802585 while (i + copy < in_size && copy < 127 && in[i + copy] != in[i + copy - 1])
201 37804643 copy++;
202
203
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 997942 if (o + 1 + copy >= out_size)
204 72 return -1;
205 997870 out[o++] = -copy;
206
207
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 39787460 for (int x = 0; x < copy; x++)
208 38789590 out[o + x] = in[i + x];
209
210 997870 o += copy;
211 997870 i += copy;
212 997870 copy = 0;
213 }
214
215 1104027 run = 1;
216 }
217
218 11160 return o;
219 }
220
221 39 static int encode_scanline_rle(EXRContext *s, const AVFrame *frame)
222 {
223
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 39 const int64_t element_size = s->pixel_type == EXR_HALF ? 2LL : 4LL;
224
225
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 11271 for (int y = 0; y < frame->height; y++) {
226 11232 EXRScanlineData *scanline = &s->scanline[y];
227 11232 int64_t tmp_size = element_size * s->planes * frame->width;
228 11232 int64_t max_compressed_size = tmp_size * 3 / 2;
229
230 11232 av_fast_padded_malloc(&scanline->uncompressed_data, &scanline->uncompressed_size, tmp_size);
231
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 11232 if (!scanline->uncompressed_data)
232 ✗ return AVERROR(ENOMEM);
233
234 11232 av_fast_padded_malloc(&scanline->tmp, &scanline->tmp_size, tmp_size);
235
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 11232 if (!scanline->tmp)
236 ✗ return AVERROR(ENOMEM);
237
238 11232 av_fast_padded_malloc(&scanline->compressed_data, &scanline->compressed_size, max_compressed_size);
239
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 11232 if (!scanline->compressed_data)
240 ✗ return AVERROR(ENOMEM);
241
242
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 11232 switch (s->pixel_type) {
243 11232 case EXR_FLOAT:
244
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 41184 for (int p = 0; p < s->planes; p++) {
245 29952 int ch = s->ch_order[p];
246
247 29952 memcpy(scanline->uncompressed_data + frame->width * 4 * p,
248 29952 frame->data[ch] + y * frame->linesize[ch], frame->width * 4);
249 }
250 11232 break;
251 ✗ case EXR_HALF:
252 ✗ for (int p = 0; p < s->planes; p++) {
253 ✗ int ch = s->ch_order[p];
254 ✗ uint16_t *dst = (uint16_t *)(scanline->uncompressed_data + frame->width * 2 * p);
255 ✗ const uint32_t *src = (const uint32_t *)(frame->data[ch] + y * frame->linesize[ch]);
256
257 ✗ for (int x = 0; x < frame->width; x++)
258 ✗ dst[x] = float2half(src[x], &s->f2h_tables);
259 }
260 ✗ break;
261 }
262
263 11232 reorder_pixels(scanline->tmp, scanline->uncompressed_data, tmp_size);
264 11232 predictor(scanline->tmp, tmp_size);
265 22464 scanline->actual_size = rle_compress(scanline->compressed_data,
266 max_compressed_size,
267 11232 scanline->tmp, tmp_size);
268
269
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 11232 if (scanline->actual_size <= 0 || scanline->actual_size >= tmp_size) {
270 7077 FFSWAP(uint8_t *, scanline->uncompressed_data, scanline->compressed_data);
271 7077 FFSWAP(int, scanline->uncompressed_size, scanline->compressed_size);
272 7077 scanline->actual_size = tmp_size;
273 }
274 }
275
276 39 return 0;
277 }
278
279 78 static int encode_scanline_zip(EXRContext *s, const AVFrame *frame)
280 {
281
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 78 const int64_t element_size = s->pixel_type == EXR_HALF ? 2LL : 4LL;
282
283
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 12012 for (int y = 0; y < s->nb_scanlines; y++) {
284 11934 EXRScanlineData *scanline = &s->scanline[y];
285 11934 const int scanline_height = FFMIN(s->scanline_height, frame->height - y * s->scanline_height);
286 11934 int64_t tmp_size = element_size * s->planes * frame->width * scanline_height;
287 11934 int64_t max_compressed_size = tmp_size * 3 / 2;
288 unsigned long actual_size, source_size;
289
290 11934 av_fast_padded_malloc(&scanline->uncompressed_data, &scanline->uncompressed_size, tmp_size);
291
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 11934 if (!scanline->uncompressed_data)
292 ✗ return AVERROR(ENOMEM);
293
294 11934 av_fast_padded_malloc(&scanline->tmp, &scanline->tmp_size, tmp_size);
295
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 11934 if (!scanline->tmp)
296 ✗ return AVERROR(ENOMEM);
297
298 11934 av_fast_padded_malloc(&scanline->compressed_data, &scanline->compressed_size, max_compressed_size);
299
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 11934 if (!scanline->compressed_data)
300 ✗ return AVERROR(ENOMEM);
301
302
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 11934 switch (s->pixel_type) {
303 11934 case EXR_FLOAT:
304
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 34398 for (int l = 0; l < scanline_height; l++) {
305 22464 const int scanline_size = frame->width * 4 * s->planes;
306
307
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 82368 for (int p = 0; p < s->planes; p++) {
308 59904 int ch = s->ch_order[p];
309
310 59904 memcpy(scanline->uncompressed_data + scanline_size * l + p * frame->width * 4,
311 59904 frame->data[ch] + (y * s->scanline_height + l) * frame->linesize[ch],
312 59904 frame->width * 4);
313 }
314 }
315 11934 break;
316 ✗ case EXR_HALF:
317 ✗ for (int l = 0; l < scanline_height; l++) {
318 ✗ const int scanline_size = frame->width * 2 * s->planes;
319
320 ✗ for (int p = 0; p < s->planes; p++) {
321 ✗ int ch = s->ch_order[p];
322 ✗ uint16_t *dst = (uint16_t *)(scanline->uncompressed_data + scanline_size * l + p * frame->width * 2);
323 ✗ const uint32_t *src = (const uint32_t *)(frame->data[ch] + (y * s->scanline_height + l) * frame->linesize[ch]);
324
325 ✗ for (int x = 0; x < frame->width; x++)
326 ✗ dst[x] = float2half(src[x], &s->f2h_tables);
327 }
328 }
329 ✗ break;
330 }
331
332 11934 reorder_pixels(scanline->tmp, scanline->uncompressed_data, tmp_size);
333 11934 predictor(scanline->tmp, tmp_size);
334 11934 source_size = tmp_size;
335 11934 actual_size = max_compressed_size;
336 11934 compress(scanline->compressed_data, &actual_size,
337 11934 scanline->tmp, source_size);
338
339 11934 scanline->actual_size = actual_size;
340
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 11934 if (scanline->actual_size >= tmp_size) {
341 ✗ FFSWAP(uint8_t *, scanline->uncompressed_data, scanline->compressed_data);
342 ✗ FFSWAP(int, scanline->uncompressed_size, scanline->compressed_size);
343 ✗ scanline->actual_size = tmp_size;
344 }
345 }
346
347 78 return 0;
348 }
349
350 156 static int encode_frame(AVCodecContext *avctx, AVPacket *pkt,
351 const AVFrame *frame, int *got_packet)
352 {
353 156 EXRContext *s = avctx->priv_data;
354 156 PutByteContext *pb = &s->pb;
355 int64_t offset;
356 int ret;
357 312 int64_t out_size = 2048LL + avctx->height * 16LL +
358 156 av_image_get_buffer_size(avctx->pix_fmt,
359 avctx->width,
360 156 avctx->height, 64) * 3LL / 2;
361
362
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 156 if ((ret = ff_get_encode_buffer(avctx, pkt, out_size, 0)) < 0)
363 ✗ return ret;
364
365 156 bytestream2_init_writer(pb, pkt->data, pkt->size);
366
367 156 bytestream2_put_le32(pb, 20000630);
368 156 bytestream2_put_byte(pb, 2);
369 156 bytestream2_put_le24(pb, 0);
370 156 bytestream2_put_buffer(pb, "channels\0chlist\0", 16);
371 156 bytestream2_put_le32(pb, s->planes * 18 + 1);
372
373
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 572 for (int p = 0; p < s->planes; p++) {
374 416 bytestream2_put_byte(pb, s->ch_names[p]);
375 416 bytestream2_put_byte(pb, 0);
376 416 bytestream2_put_le32(pb, s->pixel_type);
377 416 bytestream2_put_le32(pb, 0);
378 416 bytestream2_put_le32(pb, 1);
379 416 bytestream2_put_le32(pb, 1);
380 }
381 156 bytestream2_put_byte(pb, 0);
382
383 156 bytestream2_put_buffer(pb, "compression\0compression\0", 24);
384 156 bytestream2_put_le32(pb, 1);
385 156 bytestream2_put_byte(pb, s->compression);
386
387 156 bytestream2_put_buffer(pb, "dataWindow\0box2i\0", 17);
388 156 bytestream2_put_le32(pb, 16);
389 156 bytestream2_put_le32(pb, 0);
390 156 bytestream2_put_le32(pb, 0);
391 156 bytestream2_put_le32(pb, avctx->width - 1);
392 156 bytestream2_put_le32(pb, avctx->height - 1);
393
394 156 bytestream2_put_buffer(pb, "displayWindow\0box2i\0", 20);
395 156 bytestream2_put_le32(pb, 16);
396 156 bytestream2_put_le32(pb, 0);
397 156 bytestream2_put_le32(pb, 0);
398 156 bytestream2_put_le32(pb, avctx->width - 1);
399 156 bytestream2_put_le32(pb, avctx->height - 1);
400
401 156 bytestream2_put_buffer(pb, "lineOrder\0lineOrder\0", 20);
402 156 bytestream2_put_le32(pb, 1);
403 156 bytestream2_put_byte(pb, 0);
404
405 156 bytestream2_put_buffer(pb, "screenWindowCenter\0v2f\0", 23);
406 156 bytestream2_put_le32(pb, 8);
407 156 bytestream2_put_le64(pb, 0);
408
409 156 bytestream2_put_buffer(pb, "screenWindowWidth\0float\0", 24);
410 156 bytestream2_put_le32(pb, 4);
411 156 bytestream2_put_le32(pb, av_float2int(1.f));
412
413
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 156 if (avctx->sample_aspect_ratio.num && avctx->sample_aspect_ratio.den) {
414 ✗ bytestream2_put_buffer(pb, "pixelAspectRatio\0float\0", 23);
415 ✗ bytestream2_put_le32(pb, 4);
416 ✗ bytestream2_put_le32(pb, av_float2int(av_q2d(avctx->sample_aspect_ratio)));
417 }
418
419
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 156 if (avctx->framerate.num && avctx->framerate.den) {
420 156 bytestream2_put_buffer(pb, "framesPerSecond\0rational\0", 25);
421 156 bytestream2_put_le32(pb, 8);
422 156 bytestream2_put_le32(pb, avctx->framerate.num);
423 156 bytestream2_put_le32(pb, avctx->framerate.den);
424 }
425
426 156 bytestream2_put_buffer(pb, "gamma\0float\0", 12);
427 156 bytestream2_put_le32(pb, 4);
428 156 bytestream2_put_le32(pb, av_float2int(s->gamma));
429
430 156 bytestream2_put_buffer(pb, "writer\0string\0", 14);
431 156 bytestream2_put_le32(pb, 4);
432 156 bytestream2_put_buffer(pb, "lavc", 4);
433 156 bytestream2_put_byte(pb, 0);
434
435
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 156 switch (s->compression) {
436 39 case EXR_RAW:
437 /* nothing to do */
438 39 break;
439 39 case EXR_RLE:
440 39 encode_scanline_rle(s, frame);
441 39 break;
442 78 case EXR_ZIP16:
443 case EXR_ZIP1:
444 78 encode_scanline_zip(s, frame);
445 78 break;
446 ✗ default:
447 ✗ av_assert0(0);
448 }
449
450
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 156 switch (s->compression) {
451 39 case EXR_RAW:
452 39 offset = bytestream2_tell_p(pb) + avctx->height * 8LL;
453
454
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 39 if (s->pixel_type == EXR_FLOAT) {
455
456
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 11271 for (int y = 0; y < avctx->height; y++) {
457 11232 bytestream2_put_le64(pb, offset);
458 11232 offset += avctx->width * s->planes * 4 + 8;
459 }
460
461
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 11271 for (int y = 0; y < avctx->height; y++) {
462 11232 bytestream2_put_le32(pb, y);
463 11232 bytestream2_put_le32(pb, s->planes * avctx->width * 4);
464
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 41184 for (int p = 0; p < s->planes; p++) {
465 29952 int ch = s->ch_order[p];
466 29952 bytestream2_put_buffer(pb, frame->data[ch] + y * frame->linesize[ch],
467 29952 avctx->width * 4);
468 }
469 }
470 } else {
471 ✗ for (int y = 0; y < avctx->height; y++) {
472 ✗ bytestream2_put_le64(pb, offset);
473 ✗ offset += avctx->width * s->planes * 2 + 8;
474 }
475
476 ✗ for (int y = 0; y < avctx->height; y++) {
477 ✗ bytestream2_put_le32(pb, y);
478 ✗ bytestream2_put_le32(pb, s->planes * avctx->width * 2);
479 ✗ for (int p = 0; p < s->planes; p++) {
480 ✗ int ch = s->ch_order[p];
481 ✗ const uint32_t *src = (const uint32_t *)(frame->data[ch] + y * frame->linesize[ch]);
482
483 ✗ for (int x = 0; x < frame->width; x++)
484 ✗ bytestream2_put_le16(pb, float2half(src[x], &s->f2h_tables));
485 }
486 }
487 }
488 39 break;
489 117 case EXR_ZIP16:
490 case EXR_ZIP1:
491 case EXR_RLE:
492 117 offset = bytestream2_tell_p(pb) + s->nb_scanlines * 8LL;
493
494
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 23283 for (int y = 0; y < s->nb_scanlines; y++) {
495 23166 EXRScanlineData *scanline = &s->scanline[y];
496
497 23166 bytestream2_put_le64(pb, offset);
498 23166 offset += scanline->actual_size + 8;
499 }
500
501
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 23283 for (int y = 0; y < s->nb_scanlines; y++) {
502 23166 EXRScanlineData *scanline = &s->scanline[y];
503
504 23166 bytestream2_put_le32(pb, y * s->scanline_height);
505 23166 bytestream2_put_le32(pb, scanline->actual_size);
506 23166 bytestream2_put_buffer(pb, scanline->compressed_data,
507 23166 scanline->actual_size);
508 }
509 117 break;
510 ✗ default:
511 ✗ av_assert0(0);
512 }
513
514 156 av_shrink_packet(pkt, bytestream2_tell_p(pb));
515
516 156 *got_packet = 1;
517
518 156 return 0;
519 }
520
521 #define OFFSET(x) offsetof(EXRContext, x)
522 #define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
523 static const AVOption options[] = {
524 { "compression", "set compression type", OFFSET(compression), AV_OPT_TYPE_INT, {.i64=0}, 0, EXR_NBCOMPR-1, VE, .unit = "compr" },
525 { "none", "none", 0, AV_OPT_TYPE_CONST, {.i64=EXR_RAW}, 0, 0, VE, .unit = "compr" },
526 { "rle" , "RLE", 0, AV_OPT_TYPE_CONST, {.i64=EXR_RLE}, 0, 0, VE, .unit = "compr" },
527 { "zip1", "ZIP1", 0, AV_OPT_TYPE_CONST, {.i64=EXR_ZIP1}, 0, 0, VE, .unit = "compr" },
528 { "zip16", "ZIP16", 0, AV_OPT_TYPE_CONST, {.i64=EXR_ZIP16}, 0, 0, VE, .unit = "compr" },
529 { "format", "set pixel type", OFFSET(pixel_type), AV_OPT_TYPE_INT, {.i64=EXR_FLOAT}, EXR_HALF, EXR_UNKNOWN-1, VE, .unit = "pixel" },
530 { "half" , NULL, 0, AV_OPT_TYPE_CONST, {.i64=EXR_HALF}, 0, 0, VE, .unit = "pixel" },
531 { "float", NULL, 0, AV_OPT_TYPE_CONST, {.i64=EXR_FLOAT}, 0, 0, VE, .unit = "pixel" },
532 { "gamma", "set gamma", OFFSET(gamma), AV_OPT_TYPE_FLOAT, {.dbl=1.f}, 0.001, FLT_MAX, VE },
533 { NULL},
534 };
535
536 static const AVClass exr_class = {
537 .class_name = "exr",
538 .item_name = av_default_item_name,
539 .option = options,
540 .version = LIBAVUTIL_VERSION_INT,
541 };
542
543 const FFCodec ff_exr_encoder = {
544 .p.name = "exr",
545 CODEC_LONG_NAME("OpenEXR image"),
546 .priv_data_size = sizeof(EXRContext),
547 .p.priv_class = &exr_class,
548 .p.type = AVMEDIA_TYPE_VIDEO,
549 .p.id = AV_CODEC_ID_EXR,
550 .p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_FRAME_THREADS |
551 AV_CODEC_CAP_ENCODER_REORDERED_OPAQUE,
552 .init = encode_init,
553 FF_CODEC_ENCODE_CB(encode_frame),
554 .close = encode_close,
555 CODEC_PIXFMTS(AV_PIX_FMT_GRAYF32, AV_PIX_FMT_GBRPF32, AV_PIX_FMT_GBRAPF32),
556 .alpha_modes = AVALPHA_MODE_PREMULTIPLIED,
557 };
558