blob: 4cfe3779821d66299e54ae34449bc71bec6363ad
1 | /* |
2 | * This file is part of FFmpeg. |
3 | * |
4 | * FFmpeg is free software; you can redistribute it and/or |
5 | * modify it under the terms of the GNU Lesser General Public |
6 | * License as published by the Free Software Foundation; either |
7 | * version 2.1 of the License, or (at your option) any later version. |
8 | * |
9 | * FFmpeg is distributed in the hope that it will be useful, |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
12 | * Lesser General Public License for more details. |
13 | * |
14 | * You should have received a copy of the GNU Lesser General Public |
15 | * License along with FFmpeg; if not, write to the Free Software |
16 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
17 | */ |
18 | |
19 | #include "config.h" |
20 | |
21 | #include "buffer.h" |
22 | #include "common.h" |
23 | #include "hwcontext.h" |
24 | #include "hwcontext_internal.h" |
25 | #include "imgutils.h" |
26 | #include "log.h" |
27 | #include "mem.h" |
28 | #include "pixdesc.h" |
29 | #include "pixfmt.h" |
30 | |
31 | static const HWContextType *hw_table[] = { |
32 | #if CONFIG_CUDA |
33 | &ff_hwcontext_type_cuda, |
34 | #endif |
35 | #if CONFIG_DXVA2 |
36 | &ff_hwcontext_type_dxva2, |
37 | #endif |
38 | #if CONFIG_QSV |
39 | &ff_hwcontext_type_qsv, |
40 | #endif |
41 | #if CONFIG_VAAPI |
42 | &ff_hwcontext_type_vaapi, |
43 | #endif |
44 | #if CONFIG_VDPAU |
45 | &ff_hwcontext_type_vdpau, |
46 | #endif |
47 | NULL, |
48 | }; |
49 | |
50 | static const AVClass hwdevice_ctx_class = { |
51 | .class_name = "AVHWDeviceContext", |
52 | .item_name = av_default_item_name, |
53 | .version = LIBAVUTIL_VERSION_INT, |
54 | }; |
55 | |
56 | static void hwdevice_ctx_free(void *opaque, uint8_t *data) |
57 | { |
58 | AVHWDeviceContext *ctx = (AVHWDeviceContext*)data; |
59 | |
60 | /* uninit might still want access the hw context and the user |
61 | * free() callback might destroy it, so uninit has to be called first */ |
62 | if (ctx->internal->hw_type->device_uninit) |
63 | ctx->internal->hw_type->device_uninit(ctx); |
64 | |
65 | if (ctx->free) |
66 | ctx->free(ctx); |
67 | |
68 | av_freep(&ctx->hwctx); |
69 | av_freep(&ctx->internal->priv); |
70 | av_freep(&ctx->internal); |
71 | av_freep(&ctx); |
72 | } |
73 | |
74 | AVBufferRef *av_hwdevice_ctx_alloc(enum AVHWDeviceType type) |
75 | { |
76 | AVHWDeviceContext *ctx; |
77 | AVBufferRef *buf; |
78 | const HWContextType *hw_type = NULL; |
79 | int i; |
80 | |
81 | for (i = 0; hw_table[i]; i++) { |
82 | if (hw_table[i]->type == type) { |
83 | hw_type = hw_table[i]; |
84 | break; |
85 | } |
86 | } |
87 | if (!hw_type) |
88 | return NULL; |
89 | |
90 | ctx = av_mallocz(sizeof(*ctx)); |
91 | if (!ctx) |
92 | return NULL; |
93 | |
94 | ctx->internal = av_mallocz(sizeof(*ctx->internal)); |
95 | if (!ctx->internal) |
96 | goto fail; |
97 | |
98 | if (hw_type->device_priv_size) { |
99 | ctx->internal->priv = av_mallocz(hw_type->device_priv_size); |
100 | if (!ctx->internal->priv) |
101 | goto fail; |
102 | } |
103 | |
104 | if (hw_type->device_hwctx_size) { |
105 | ctx->hwctx = av_mallocz(hw_type->device_hwctx_size); |
106 | if (!ctx->hwctx) |
107 | goto fail; |
108 | } |
109 | |
110 | buf = av_buffer_create((uint8_t*)ctx, sizeof(*ctx), |
111 | hwdevice_ctx_free, NULL, |
112 | AV_BUFFER_FLAG_READONLY); |
113 | if (!buf) |
114 | goto fail; |
115 | |
116 | ctx->type = type; |
117 | ctx->av_class = &hwdevice_ctx_class; |
118 | |
119 | ctx->internal->hw_type = hw_type; |
120 | |
121 | return buf; |
122 | |
123 | fail: |
124 | if (ctx->internal) |
125 | av_freep(&ctx->internal->priv); |
126 | av_freep(&ctx->internal); |
127 | av_freep(&ctx->hwctx); |
128 | av_freep(&ctx); |
129 | return NULL; |
130 | } |
131 | |
132 | int av_hwdevice_ctx_init(AVBufferRef *ref) |
133 | { |
134 | AVHWDeviceContext *ctx = (AVHWDeviceContext*)ref->data; |
135 | int ret; |
136 | |
137 | if (ctx->internal->hw_type->device_init) { |
138 | ret = ctx->internal->hw_type->device_init(ctx); |
139 | if (ret < 0) |
140 | goto fail; |
141 | } |
142 | |
143 | return 0; |
144 | fail: |
145 | if (ctx->internal->hw_type->device_uninit) |
146 | ctx->internal->hw_type->device_uninit(ctx); |
147 | return ret; |
148 | } |
149 | |
150 | static const AVClass hwframe_ctx_class = { |
151 | .class_name = "AVHWFramesContext", |
152 | .item_name = av_default_item_name, |
153 | .version = LIBAVUTIL_VERSION_INT, |
154 | }; |
155 | |
156 | static void hwframe_ctx_free(void *opaque, uint8_t *data) |
157 | { |
158 | AVHWFramesContext *ctx = (AVHWFramesContext*)data; |
159 | |
160 | if (ctx->internal->source_frames) { |
161 | av_buffer_unref(&ctx->internal->source_frames); |
162 | |
163 | } else { |
164 | if (ctx->internal->pool_internal) |
165 | av_buffer_pool_uninit(&ctx->internal->pool_internal); |
166 | |
167 | if (ctx->internal->hw_type->frames_uninit) |
168 | ctx->internal->hw_type->frames_uninit(ctx); |
169 | |
170 | if (ctx->free) |
171 | ctx->free(ctx); |
172 | } |
173 | |
174 | av_buffer_unref(&ctx->device_ref); |
175 | |
176 | av_freep(&ctx->hwctx); |
177 | av_freep(&ctx->internal->priv); |
178 | av_freep(&ctx->internal); |
179 | av_freep(&ctx); |
180 | } |
181 | |
182 | AVBufferRef *av_hwframe_ctx_alloc(AVBufferRef *device_ref_in) |
183 | { |
184 | AVHWDeviceContext *device_ctx = (AVHWDeviceContext*)device_ref_in->data; |
185 | const HWContextType *hw_type = device_ctx->internal->hw_type; |
186 | AVHWFramesContext *ctx; |
187 | AVBufferRef *buf, *device_ref = NULL; |
188 | |
189 | ctx = av_mallocz(sizeof(*ctx)); |
190 | if (!ctx) |
191 | return NULL; |
192 | |
193 | ctx->internal = av_mallocz(sizeof(*ctx->internal)); |
194 | if (!ctx->internal) |
195 | goto fail; |
196 | |
197 | if (hw_type->frames_priv_size) { |
198 | ctx->internal->priv = av_mallocz(hw_type->frames_priv_size); |
199 | if (!ctx->internal->priv) |
200 | goto fail; |
201 | } |
202 | |
203 | if (hw_type->frames_hwctx_size) { |
204 | ctx->hwctx = av_mallocz(hw_type->frames_hwctx_size); |
205 | if (!ctx->hwctx) |
206 | goto fail; |
207 | } |
208 | |
209 | device_ref = av_buffer_ref(device_ref_in); |
210 | if (!device_ref) |
211 | goto fail; |
212 | |
213 | buf = av_buffer_create((uint8_t*)ctx, sizeof(*ctx), |
214 | hwframe_ctx_free, NULL, |
215 | AV_BUFFER_FLAG_READONLY); |
216 | if (!buf) |
217 | goto fail; |
218 | |
219 | ctx->av_class = &hwframe_ctx_class; |
220 | ctx->device_ref = device_ref; |
221 | ctx->device_ctx = device_ctx; |
222 | ctx->format = AV_PIX_FMT_NONE; |
223 | ctx->sw_format = AV_PIX_FMT_NONE; |
224 | |
225 | ctx->internal->hw_type = hw_type; |
226 | |
227 | return buf; |
228 | |
229 | fail: |
230 | if (device_ref) |
231 | av_buffer_unref(&device_ref); |
232 | if (ctx->internal) |
233 | av_freep(&ctx->internal->priv); |
234 | av_freep(&ctx->internal); |
235 | av_freep(&ctx->hwctx); |
236 | av_freep(&ctx); |
237 | return NULL; |
238 | } |
239 | |
240 | static int hwframe_pool_prealloc(AVBufferRef *ref) |
241 | { |
242 | AVHWFramesContext *ctx = (AVHWFramesContext*)ref->data; |
243 | AVFrame **frames; |
244 | int i, ret = 0; |
245 | |
246 | frames = av_mallocz_array(ctx->initial_pool_size, sizeof(*frames)); |
247 | if (!frames) |
248 | return AVERROR(ENOMEM); |
249 | |
250 | for (i = 0; i < ctx->initial_pool_size; i++) { |
251 | frames[i] = av_frame_alloc(); |
252 | if (!frames[i]) |
253 | goto fail; |
254 | |
255 | ret = av_hwframe_get_buffer(ref, frames[i], 0); |
256 | if (ret < 0) |
257 | goto fail; |
258 | } |
259 | |
260 | fail: |
261 | for (i = 0; i < ctx->initial_pool_size; i++) |
262 | av_frame_free(&frames[i]); |
263 | av_freep(&frames); |
264 | |
265 | return ret; |
266 | } |
267 | |
268 | int av_hwframe_ctx_init(AVBufferRef *ref) |
269 | { |
270 | AVHWFramesContext *ctx = (AVHWFramesContext*)ref->data; |
271 | const enum AVPixelFormat *pix_fmt; |
272 | int ret; |
273 | |
274 | if (ctx->internal->source_frames) { |
275 | /* A derived frame context is already initialised. */ |
276 | return 0; |
277 | } |
278 | |
279 | /* validate the pixel format */ |
280 | for (pix_fmt = ctx->internal->hw_type->pix_fmts; *pix_fmt != AV_PIX_FMT_NONE; pix_fmt++) { |
281 | if (*pix_fmt == ctx->format) |
282 | break; |
283 | } |
284 | if (*pix_fmt == AV_PIX_FMT_NONE) { |
285 | av_log(ctx, AV_LOG_ERROR, |
286 | "The hardware pixel format '%s' is not supported by the device type '%s'\n", |
287 | av_get_pix_fmt_name(ctx->format), ctx->internal->hw_type->name); |
288 | return AVERROR(ENOSYS); |
289 | } |
290 | |
291 | /* validate the dimensions */ |
292 | ret = av_image_check_size(ctx->width, ctx->height, 0, ctx); |
293 | if (ret < 0) |
294 | return ret; |
295 | |
296 | /* format-specific init */ |
297 | if (ctx->internal->hw_type->frames_init) { |
298 | ret = ctx->internal->hw_type->frames_init(ctx); |
299 | if (ret < 0) |
300 | goto fail; |
301 | } |
302 | |
303 | if (ctx->internal->pool_internal && !ctx->pool) |
304 | ctx->pool = ctx->internal->pool_internal; |
305 | |
306 | /* preallocate the frames in the pool, if requested */ |
307 | if (ctx->initial_pool_size > 0) { |
308 | ret = hwframe_pool_prealloc(ref); |
309 | if (ret < 0) |
310 | goto fail; |
311 | } |
312 | |
313 | return 0; |
314 | fail: |
315 | if (ctx->internal->hw_type->frames_uninit) |
316 | ctx->internal->hw_type->frames_uninit(ctx); |
317 | return ret; |
318 | } |
319 | |
320 | int av_hwframe_transfer_get_formats(AVBufferRef *hwframe_ref, |
321 | enum AVHWFrameTransferDirection dir, |
322 | enum AVPixelFormat **formats, int flags) |
323 | { |
324 | AVHWFramesContext *ctx = (AVHWFramesContext*)hwframe_ref->data; |
325 | |
326 | if (!ctx->internal->hw_type->transfer_get_formats) |
327 | return AVERROR(ENOSYS); |
328 | |
329 | return ctx->internal->hw_type->transfer_get_formats(ctx, dir, formats); |
330 | } |
331 | |
332 | static int transfer_data_alloc(AVFrame *dst, const AVFrame *src, int flags) |
333 | { |
334 | AVHWFramesContext *ctx = (AVHWFramesContext*)src->hw_frames_ctx->data; |
335 | AVFrame *frame_tmp; |
336 | int ret = 0; |
337 | |
338 | frame_tmp = av_frame_alloc(); |
339 | if (!frame_tmp) |
340 | return AVERROR(ENOMEM); |
341 | |
342 | /* if the format is set, use that |
343 | * otherwise pick the first supported one */ |
344 | if (dst->format >= 0) { |
345 | frame_tmp->format = dst->format; |
346 | } else { |
347 | enum AVPixelFormat *formats; |
348 | |
349 | ret = av_hwframe_transfer_get_formats(src->hw_frames_ctx, |
350 | AV_HWFRAME_TRANSFER_DIRECTION_FROM, |
351 | &formats, 0); |
352 | if (ret < 0) |
353 | goto fail; |
354 | frame_tmp->format = formats[0]; |
355 | av_freep(&formats); |
356 | } |
357 | frame_tmp->width = ctx->width; |
358 | frame_tmp->height = ctx->height; |
359 | |
360 | ret = av_frame_get_buffer(frame_tmp, 32); |
361 | if (ret < 0) |
362 | goto fail; |
363 | |
364 | ret = av_hwframe_transfer_data(frame_tmp, src, flags); |
365 | if (ret < 0) |
366 | goto fail; |
367 | |
368 | frame_tmp->width = src->width; |
369 | frame_tmp->height = src->height; |
370 | |
371 | av_frame_move_ref(dst, frame_tmp); |
372 | |
373 | fail: |
374 | av_frame_free(&frame_tmp); |
375 | return ret; |
376 | } |
377 | |
378 | int av_hwframe_transfer_data(AVFrame *dst, const AVFrame *src, int flags) |
379 | { |
380 | AVHWFramesContext *ctx; |
381 | int ret; |
382 | |
383 | if (!dst->buf[0]) |
384 | return transfer_data_alloc(dst, src, flags); |
385 | |
386 | if (src->hw_frames_ctx) { |
387 | ctx = (AVHWFramesContext*)src->hw_frames_ctx->data; |
388 | |
389 | ret = ctx->internal->hw_type->transfer_data_from(ctx, dst, src); |
390 | if (ret < 0) |
391 | return ret; |
392 | } else if (dst->hw_frames_ctx) { |
393 | ctx = (AVHWFramesContext*)dst->hw_frames_ctx->data; |
394 | |
395 | ret = ctx->internal->hw_type->transfer_data_to(ctx, dst, src); |
396 | if (ret < 0) |
397 | return ret; |
398 | } else |
399 | return AVERROR(ENOSYS); |
400 | |
401 | return 0; |
402 | } |
403 | |
404 | int av_hwframe_get_buffer(AVBufferRef *hwframe_ref, AVFrame *frame, int flags) |
405 | { |
406 | AVHWFramesContext *ctx = (AVHWFramesContext*)hwframe_ref->data; |
407 | int ret; |
408 | |
409 | if (ctx->internal->source_frames) { |
410 | // This is a derived frame context, so we allocate in the source |
411 | // and map the frame immediately. |
412 | AVFrame *src_frame; |
413 | |
414 | src_frame = av_frame_alloc(); |
415 | if (!src_frame) |
416 | return AVERROR(ENOMEM); |
417 | |
418 | ret = av_hwframe_get_buffer(ctx->internal->source_frames, |
419 | src_frame, 0); |
420 | if (ret < 0) |
421 | return ret; |
422 | |
423 | ret = av_hwframe_map(frame, src_frame, 0); |
424 | if (ret) { |
425 | av_log(ctx, AV_LOG_ERROR, "Failed to map frame into derived " |
426 | "frame context: %d.\n", ret); |
427 | av_frame_free(&src_frame); |
428 | return ret; |
429 | } |
430 | |
431 | // Free the source frame immediately - the mapped frame still |
432 | // contains a reference to it. |
433 | av_frame_free(&src_frame); |
434 | |
435 | return 0; |
436 | } |
437 | |
438 | if (!ctx->internal->hw_type->frames_get_buffer) |
439 | return AVERROR(ENOSYS); |
440 | |
441 | if (!ctx->pool) |
442 | return AVERROR(EINVAL); |
443 | |
444 | frame->hw_frames_ctx = av_buffer_ref(hwframe_ref); |
445 | if (!frame->hw_frames_ctx) |
446 | return AVERROR(ENOMEM); |
447 | |
448 | ret = ctx->internal->hw_type->frames_get_buffer(ctx, frame); |
449 | if (ret < 0) { |
450 | av_buffer_unref(&frame->hw_frames_ctx); |
451 | return ret; |
452 | } |
453 | |
454 | return 0; |
455 | } |
456 | |
457 | void *av_hwdevice_hwconfig_alloc(AVBufferRef *ref) |
458 | { |
459 | AVHWDeviceContext *ctx = (AVHWDeviceContext*)ref->data; |
460 | const HWContextType *hw_type = ctx->internal->hw_type; |
461 | |
462 | if (hw_type->device_hwconfig_size == 0) |
463 | return NULL; |
464 | |
465 | return av_mallocz(hw_type->device_hwconfig_size); |
466 | } |
467 | |
468 | AVHWFramesConstraints *av_hwdevice_get_hwframe_constraints(AVBufferRef *ref, |
469 | const void *hwconfig) |
470 | { |
471 | AVHWDeviceContext *ctx = (AVHWDeviceContext*)ref->data; |
472 | const HWContextType *hw_type = ctx->internal->hw_type; |
473 | AVHWFramesConstraints *constraints; |
474 | |
475 | if (!hw_type->frames_get_constraints) |
476 | return NULL; |
477 | |
478 | constraints = av_mallocz(sizeof(*constraints)); |
479 | if (!constraints) |
480 | return NULL; |
481 | |
482 | constraints->min_width = constraints->min_height = 0; |
483 | constraints->max_width = constraints->max_height = INT_MAX; |
484 | |
485 | if (hw_type->frames_get_constraints(ctx, hwconfig, constraints) >= 0) { |
486 | return constraints; |
487 | } else { |
488 | av_hwframe_constraints_free(&constraints); |
489 | return NULL; |
490 | } |
491 | } |
492 | |
493 | void av_hwframe_constraints_free(AVHWFramesConstraints **constraints) |
494 | { |
495 | if (*constraints) { |
496 | av_freep(&(*constraints)->valid_hw_formats); |
497 | av_freep(&(*constraints)->valid_sw_formats); |
498 | } |
499 | av_freep(constraints); |
500 | } |
501 | |
502 | int av_hwdevice_ctx_create(AVBufferRef **pdevice_ref, enum AVHWDeviceType type, |
503 | const char *device, AVDictionary *opts, int flags) |
504 | { |
505 | AVBufferRef *device_ref = NULL; |
506 | AVHWDeviceContext *device_ctx; |
507 | int ret = 0; |
508 | |
509 | device_ref = av_hwdevice_ctx_alloc(type); |
510 | if (!device_ref) { |
511 | ret = AVERROR(ENOMEM); |
512 | goto fail; |
513 | } |
514 | device_ctx = (AVHWDeviceContext*)device_ref->data; |
515 | |
516 | if (!device_ctx->internal->hw_type->device_create) { |
517 | ret = AVERROR(ENOSYS); |
518 | goto fail; |
519 | } |
520 | |
521 | ret = device_ctx->internal->hw_type->device_create(device_ctx, device, |
522 | opts, flags); |
523 | if (ret < 0) |
524 | goto fail; |
525 | |
526 | ret = av_hwdevice_ctx_init(device_ref); |
527 | if (ret < 0) |
528 | goto fail; |
529 | |
530 | *pdevice_ref = device_ref; |
531 | return 0; |
532 | fail: |
533 | av_buffer_unref(&device_ref); |
534 | *pdevice_ref = NULL; |
535 | return ret; |
536 | } |
537 | |
538 | static void ff_hwframe_unmap(void *opaque, uint8_t *data) |
539 | { |
540 | HWMapDescriptor *hwmap = (HWMapDescriptor*)data; |
541 | AVHWFramesContext *ctx = opaque; |
542 | |
543 | if (hwmap->unmap) |
544 | hwmap->unmap(ctx, hwmap); |
545 | |
546 | av_frame_free(&hwmap->source); |
547 | |
548 | av_buffer_unref(&hwmap->hw_frames_ctx); |
549 | |
550 | av_free(hwmap); |
551 | } |
552 | |
553 | int ff_hwframe_map_create(AVBufferRef *hwframe_ref, |
554 | AVFrame *dst, const AVFrame *src, |
555 | void (*unmap)(AVHWFramesContext *ctx, |
556 | HWMapDescriptor *hwmap), |
557 | void *priv) |
558 | { |
559 | AVHWFramesContext *ctx = (AVHWFramesContext*)hwframe_ref->data; |
560 | HWMapDescriptor *hwmap; |
561 | int ret; |
562 | |
563 | hwmap = av_mallocz(sizeof(*hwmap)); |
564 | if (!hwmap) { |
565 | ret = AVERROR(ENOMEM); |
566 | goto fail; |
567 | } |
568 | |
569 | hwmap->source = av_frame_alloc(); |
570 | if (!hwmap->source) { |
571 | ret = AVERROR(ENOMEM); |
572 | goto fail; |
573 | } |
574 | ret = av_frame_ref(hwmap->source, src); |
575 | if (ret < 0) |
576 | goto fail; |
577 | |
578 | hwmap->hw_frames_ctx = av_buffer_ref(hwframe_ref); |
579 | if (!hwmap->hw_frames_ctx) { |
580 | ret = AVERROR(ENOMEM); |
581 | goto fail; |
582 | } |
583 | |
584 | hwmap->unmap = unmap; |
585 | hwmap->priv = priv; |
586 | |
587 | dst->buf[0] = av_buffer_create((uint8_t*)hwmap, sizeof(*hwmap), |
588 | &ff_hwframe_unmap, ctx, 0); |
589 | if (!dst->buf[0]) { |
590 | ret = AVERROR(ENOMEM); |
591 | goto fail; |
592 | } |
593 | |
594 | return 0; |
595 | |
596 | fail: |
597 | if (hwmap) { |
598 | av_buffer_unref(&hwmap->hw_frames_ctx); |
599 | av_frame_free(&hwmap->source); |
600 | } |
601 | av_free(hwmap); |
602 | return ret; |
603 | } |
604 | |
605 | int av_hwframe_map(AVFrame *dst, const AVFrame *src, int flags) |
606 | { |
607 | AVHWFramesContext *src_frames, *dst_frames; |
608 | HWMapDescriptor *hwmap; |
609 | int ret; |
610 | |
611 | if (src->hw_frames_ctx && dst->hw_frames_ctx) { |
612 | src_frames = (AVHWFramesContext*)src->hw_frames_ctx->data; |
613 | dst_frames = (AVHWFramesContext*)dst->hw_frames_ctx->data; |
614 | |
615 | if ((src_frames == dst_frames && |
616 | src->format == dst_frames->sw_format && |
617 | dst->format == dst_frames->format) || |
618 | (src_frames->internal->source_frames && |
619 | src_frames->internal->source_frames->data == |
620 | (uint8_t*)dst_frames)) { |
621 | // This is an unmap operation. We don't need to directly |
622 | // do anything here other than fill in the original frame, |
623 | // because the real unmap will be invoked when the last |
624 | // reference to the mapped frame disappears. |
625 | if (!src->buf[0]) { |
626 | av_log(src_frames, AV_LOG_ERROR, "Invalid mapping " |
627 | "found when attempting unmap.\n"); |
628 | return AVERROR(EINVAL); |
629 | } |
630 | hwmap = (HWMapDescriptor*)src->buf[0]->data; |
631 | av_frame_unref(dst); |
632 | return av_frame_ref(dst, hwmap->source); |
633 | } |
634 | } |
635 | |
636 | if (src->hw_frames_ctx) { |
637 | src_frames = (AVHWFramesContext*)src->hw_frames_ctx->data; |
638 | |
639 | if (src_frames->format == src->format && |
640 | src_frames->internal->hw_type->map_from) { |
641 | ret = src_frames->internal->hw_type->map_from(src_frames, |
642 | dst, src, flags); |
643 | if (ret != AVERROR(ENOSYS)) |
644 | return ret; |
645 | } |
646 | } |
647 | |
648 | if (dst->hw_frames_ctx) { |
649 | dst_frames = (AVHWFramesContext*)dst->hw_frames_ctx->data; |
650 | |
651 | if (dst_frames->format == dst->format && |
652 | dst_frames->internal->hw_type->map_to) { |
653 | ret = dst_frames->internal->hw_type->map_to(dst_frames, |
654 | dst, src, flags); |
655 | if (ret != AVERROR(ENOSYS)) |
656 | return ret; |
657 | } |
658 | } |
659 | |
660 | return AVERROR(ENOSYS); |
661 | } |
662 | |
663 | int av_hwframe_ctx_create_derived(AVBufferRef **derived_frame_ctx, |
664 | enum AVPixelFormat format, |
665 | AVBufferRef *derived_device_ctx, |
666 | AVBufferRef *source_frame_ctx, |
667 | int flags) |
668 | { |
669 | AVBufferRef *dst_ref = NULL; |
670 | AVHWFramesContext *dst = NULL; |
671 | AVHWFramesContext *src = (AVHWFramesContext*)source_frame_ctx->data; |
672 | int ret; |
673 | |
674 | if (src->internal->source_frames) { |
675 | AVHWFramesContext *src_src = |
676 | (AVHWFramesContext*)src->internal->source_frames->data; |
677 | AVHWDeviceContext *dst_dev = |
678 | (AVHWDeviceContext*)derived_device_ctx->data; |
679 | |
680 | if (src_src->device_ctx == dst_dev) { |
681 | // This is actually an unmapping, so we just return a |
682 | // reference to the source frame context. |
683 | *derived_frame_ctx = |
684 | av_buffer_ref(src->internal->source_frames); |
685 | if (!*derived_frame_ctx) { |
686 | ret = AVERROR(ENOMEM); |
687 | goto fail; |
688 | } |
689 | return 0; |
690 | } |
691 | } |
692 | |
693 | dst_ref = av_hwframe_ctx_alloc(derived_device_ctx); |
694 | if (!dst_ref) { |
695 | ret = AVERROR(ENOMEM); |
696 | goto fail; |
697 | } |
698 | |
699 | dst = (AVHWFramesContext*)dst_ref->data; |
700 | |
701 | dst->format = format; |
702 | dst->sw_format = src->sw_format; |
703 | dst->width = src->width; |
704 | dst->height = src->height; |
705 | |
706 | dst->internal->source_frames = av_buffer_ref(source_frame_ctx); |
707 | if (!dst->internal->source_frames) { |
708 | ret = AVERROR(ENOMEM); |
709 | goto fail; |
710 | } |
711 | |
712 | ret = av_hwframe_ctx_init(dst_ref); |
713 | if (ret) |
714 | goto fail; |
715 | |
716 | *derived_frame_ctx = dst_ref; |
717 | return 0; |
718 | |
719 | fail: |
720 | if (dst) |
721 | av_buffer_unref(&dst->internal->source_frames); |
722 | av_buffer_unref(&dst_ref); |
723 | return ret; |
724 | } |
725 |