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 "avassert.h"
22 #include "buffer.h"
23 #include "common.h"
24 #include "hwcontext.h"
25 #include "hwcontext_internal.h"
26 #include "imgutils.h"
27 #include "log.h"
28 #include "mem.h"
29 #include "pixdesc.h"
30 #include "pixfmt.h"
31
32 static const HWContextType * const hw_table[] = {
33 #if CONFIG_CUDA
34 &ff_hwcontext_type_cuda,
35 #endif
36 #if CONFIG_D3D11VA
37 &ff_hwcontext_type_d3d11va,
38 #endif
39 #if CONFIG_LIBDRM
40 &ff_hwcontext_type_drm,
41 #endif
42 #if CONFIG_DXVA2
43 &ff_hwcontext_type_dxva2,
44 #endif
45 #if CONFIG_OPENCL
46 &ff_hwcontext_type_opencl,
47 #endif
48 #if CONFIG_QSV
49 &ff_hwcontext_type_qsv,
50 #endif
51 #if CONFIG_VAAPI
52 &ff_hwcontext_type_vaapi,
53 #endif
54 #if CONFIG_VDPAU
55 &ff_hwcontext_type_vdpau,
56 #endif
57 #if CONFIG_VIDEOTOOLBOX
58 &ff_hwcontext_type_videotoolbox,
59 #endif
60 #if CONFIG_MEDIACODEC
61 &ff_hwcontext_type_mediacodec,
62 #endif
63 #if CONFIG_VULKAN
64 &ff_hwcontext_type_vulkan,
65 #endif
66 NULL,
67 };
68
69 static const char *const hw_type_names[] = {
70 [AV_HWDEVICE_TYPE_CUDA] = "cuda",
71 [AV_HWDEVICE_TYPE_DRM] = "drm",
72 [AV_HWDEVICE_TYPE_DXVA2] = "dxva2",
73 [AV_HWDEVICE_TYPE_D3D11VA] = "d3d11va",
74 [AV_HWDEVICE_TYPE_OPENCL] = "opencl",
75 [AV_HWDEVICE_TYPE_QSV] = "qsv",
76 [AV_HWDEVICE_TYPE_VAAPI] = "vaapi",
77 [AV_HWDEVICE_TYPE_VDPAU] = "vdpau",
78 [AV_HWDEVICE_TYPE_VIDEOTOOLBOX] = "videotoolbox",
79 [AV_HWDEVICE_TYPE_MEDIACODEC] = "mediacodec",
80 [AV_HWDEVICE_TYPE_VULKAN] = "vulkan",
81 };
82
av_hwdevice_find_type_by_name(const char * name)83 enum AVHWDeviceType av_hwdevice_find_type_by_name(const char *name)
84 {
85 int type;
86 for (type = 0; type < FF_ARRAY_ELEMS(hw_type_names); type++) {
87 if (hw_type_names[type] && !strcmp(hw_type_names[type], name))
88 return type;
89 }
90 return AV_HWDEVICE_TYPE_NONE;
91 }
92
av_hwdevice_get_type_name(enum AVHWDeviceType type)93 const char *av_hwdevice_get_type_name(enum AVHWDeviceType type)
94 {
95 if (type > AV_HWDEVICE_TYPE_NONE &&
96 type < FF_ARRAY_ELEMS(hw_type_names))
97 return hw_type_names[type];
98 else
99 return NULL;
100 }
101
av_hwdevice_iterate_types(enum AVHWDeviceType prev)102 enum AVHWDeviceType av_hwdevice_iterate_types(enum AVHWDeviceType prev)
103 {
104 enum AVHWDeviceType next;
105 int i, set = 0;
106 for (i = 0; hw_table[i]; i++) {
107 if (prev != AV_HWDEVICE_TYPE_NONE && hw_table[i]->type <= prev)
108 continue;
109 if (!set || hw_table[i]->type < next) {
110 next = hw_table[i]->type;
111 set = 1;
112 }
113 }
114 return set ? next : AV_HWDEVICE_TYPE_NONE;
115 }
116
117 static const AVClass hwdevice_ctx_class = {
118 .class_name = "AVHWDeviceContext",
119 .item_name = av_default_item_name,
120 .version = LIBAVUTIL_VERSION_INT,
121 };
122
hwdevice_ctx_free(void * opaque,uint8_t * data)123 static void hwdevice_ctx_free(void *opaque, uint8_t *data)
124 {
125 AVHWDeviceContext *ctx = (AVHWDeviceContext*)data;
126
127 /* uninit might still want access the hw context and the user
128 * free() callback might destroy it, so uninit has to be called first */
129 if (ctx->internal->hw_type->device_uninit)
130 ctx->internal->hw_type->device_uninit(ctx);
131
132 if (ctx->free)
133 ctx->free(ctx);
134
135 av_buffer_unref(&ctx->internal->source_device);
136
137 av_freep(&ctx->hwctx);
138 av_freep(&ctx->internal->priv);
139 av_freep(&ctx->internal);
140 av_freep(&ctx);
141 }
142
av_hwdevice_ctx_alloc(enum AVHWDeviceType type)143 AVBufferRef *av_hwdevice_ctx_alloc(enum AVHWDeviceType type)
144 {
145 AVHWDeviceContext *ctx;
146 AVBufferRef *buf;
147 const HWContextType *hw_type = NULL;
148 int i;
149
150 for (i = 0; hw_table[i]; i++) {
151 if (hw_table[i]->type == type) {
152 hw_type = hw_table[i];
153 break;
154 }
155 }
156 if (!hw_type)
157 return NULL;
158
159 ctx = av_mallocz(sizeof(*ctx));
160 if (!ctx)
161 return NULL;
162
163 ctx->internal = av_mallocz(sizeof(*ctx->internal));
164 if (!ctx->internal)
165 goto fail;
166
167 if (hw_type->device_priv_size) {
168 ctx->internal->priv = av_mallocz(hw_type->device_priv_size);
169 if (!ctx->internal->priv)
170 goto fail;
171 }
172
173 if (hw_type->device_hwctx_size) {
174 ctx->hwctx = av_mallocz(hw_type->device_hwctx_size);
175 if (!ctx->hwctx)
176 goto fail;
177 }
178
179 buf = av_buffer_create((uint8_t*)ctx, sizeof(*ctx),
180 hwdevice_ctx_free, NULL,
181 AV_BUFFER_FLAG_READONLY);
182 if (!buf)
183 goto fail;
184
185 ctx->type = type;
186 ctx->av_class = &hwdevice_ctx_class;
187
188 ctx->internal->hw_type = hw_type;
189
190 return buf;
191
192 fail:
193 if (ctx->internal)
194 av_freep(&ctx->internal->priv);
195 av_freep(&ctx->internal);
196 av_freep(&ctx->hwctx);
197 av_freep(&ctx);
198 return NULL;
199 }
200
av_hwdevice_ctx_init(AVBufferRef * ref)201 int av_hwdevice_ctx_init(AVBufferRef *ref)
202 {
203 AVHWDeviceContext *ctx = (AVHWDeviceContext*)ref->data;
204 int ret;
205
206 if (ctx->internal->hw_type->device_init) {
207 ret = ctx->internal->hw_type->device_init(ctx);
208 if (ret < 0)
209 goto fail;
210 }
211
212 return 0;
213 fail:
214 if (ctx->internal->hw_type->device_uninit)
215 ctx->internal->hw_type->device_uninit(ctx);
216 return ret;
217 }
218
219 static const AVClass hwframe_ctx_class = {
220 .class_name = "AVHWFramesContext",
221 .item_name = av_default_item_name,
222 .version = LIBAVUTIL_VERSION_INT,
223 };
224
hwframe_ctx_free(void * opaque,uint8_t * data)225 static void hwframe_ctx_free(void *opaque, uint8_t *data)
226 {
227 AVHWFramesContext *ctx = (AVHWFramesContext*)data;
228
229 if (ctx->internal->pool_internal)
230 av_buffer_pool_uninit(&ctx->internal->pool_internal);
231
232 if (ctx->internal->hw_type->frames_uninit)
233 ctx->internal->hw_type->frames_uninit(ctx);
234
235 if (ctx->free)
236 ctx->free(ctx);
237
238 av_buffer_unref(&ctx->internal->source_frames);
239
240 av_buffer_unref(&ctx->device_ref);
241
242 av_freep(&ctx->hwctx);
243 av_freep(&ctx->internal->priv);
244 av_freep(&ctx->internal);
245 av_freep(&ctx);
246 }
247
av_hwframe_ctx_alloc(AVBufferRef * device_ref_in)248 AVBufferRef *av_hwframe_ctx_alloc(AVBufferRef *device_ref_in)
249 {
250 AVHWDeviceContext *device_ctx = (AVHWDeviceContext*)device_ref_in->data;
251 const HWContextType *hw_type = device_ctx->internal->hw_type;
252 AVHWFramesContext *ctx;
253 AVBufferRef *buf, *device_ref = NULL;
254
255 ctx = av_mallocz(sizeof(*ctx));
256 if (!ctx)
257 return NULL;
258
259 ctx->internal = av_mallocz(sizeof(*ctx->internal));
260 if (!ctx->internal)
261 goto fail;
262
263 if (hw_type->frames_priv_size) {
264 ctx->internal->priv = av_mallocz(hw_type->frames_priv_size);
265 if (!ctx->internal->priv)
266 goto fail;
267 }
268
269 if (hw_type->frames_hwctx_size) {
270 ctx->hwctx = av_mallocz(hw_type->frames_hwctx_size);
271 if (!ctx->hwctx)
272 goto fail;
273 }
274
275 device_ref = av_buffer_ref(device_ref_in);
276 if (!device_ref)
277 goto fail;
278
279 buf = av_buffer_create((uint8_t*)ctx, sizeof(*ctx),
280 hwframe_ctx_free, NULL,
281 AV_BUFFER_FLAG_READONLY);
282 if (!buf)
283 goto fail;
284
285 ctx->av_class = &hwframe_ctx_class;
286 ctx->device_ref = device_ref;
287 ctx->device_ctx = device_ctx;
288 ctx->format = AV_PIX_FMT_NONE;
289 ctx->sw_format = AV_PIX_FMT_NONE;
290
291 ctx->internal->hw_type = hw_type;
292
293 return buf;
294
295 fail:
296 if (device_ref)
297 av_buffer_unref(&device_ref);
298 if (ctx->internal)
299 av_freep(&ctx->internal->priv);
300 av_freep(&ctx->internal);
301 av_freep(&ctx->hwctx);
302 av_freep(&ctx);
303 return NULL;
304 }
305
hwframe_pool_prealloc(AVBufferRef * ref)306 static int hwframe_pool_prealloc(AVBufferRef *ref)
307 {
308 AVHWFramesContext *ctx = (AVHWFramesContext*)ref->data;
309 AVFrame **frames;
310 int i, ret = 0;
311
312 frames = av_calloc(ctx->initial_pool_size, sizeof(*frames));
313 if (!frames)
314 return AVERROR(ENOMEM);
315
316 for (i = 0; i < ctx->initial_pool_size; i++) {
317 frames[i] = av_frame_alloc();
318 if (!frames[i])
319 goto fail;
320
321 ret = av_hwframe_get_buffer(ref, frames[i], 0);
322 if (ret < 0)
323 goto fail;
324 }
325
326 fail:
327 for (i = 0; i < ctx->initial_pool_size; i++)
328 av_frame_free(&frames[i]);
329 av_freep(&frames);
330
331 return ret;
332 }
333
av_hwframe_ctx_init(AVBufferRef * ref)334 int av_hwframe_ctx_init(AVBufferRef *ref)
335 {
336 AVHWFramesContext *ctx = (AVHWFramesContext*)ref->data;
337 const enum AVPixelFormat *pix_fmt;
338 int ret;
339
340 if (ctx->internal->source_frames) {
341 /* A derived frame context is already initialised. */
342 return 0;
343 }
344
345 /* validate the pixel format */
346 for (pix_fmt = ctx->internal->hw_type->pix_fmts; *pix_fmt != AV_PIX_FMT_NONE; pix_fmt++) {
347 if (*pix_fmt == ctx->format)
348 break;
349 }
350 if (*pix_fmt == AV_PIX_FMT_NONE) {
351 av_log(ctx, AV_LOG_ERROR,
352 "The hardware pixel format '%s' is not supported by the device type '%s'\n",
353 av_get_pix_fmt_name(ctx->format), ctx->internal->hw_type->name);
354 return AVERROR(ENOSYS);
355 }
356
357 /* validate the dimensions */
358 ret = av_image_check_size(ctx->width, ctx->height, 0, ctx);
359 if (ret < 0)
360 return ret;
361
362 /* format-specific init */
363 if (ctx->internal->hw_type->frames_init) {
364 ret = ctx->internal->hw_type->frames_init(ctx);
365 if (ret < 0)
366 return ret;
367 }
368
369 if (ctx->internal->pool_internal && !ctx->pool)
370 ctx->pool = ctx->internal->pool_internal;
371
372 /* preallocate the frames in the pool, if requested */
373 if (ctx->initial_pool_size > 0) {
374 ret = hwframe_pool_prealloc(ref);
375 if (ret < 0)
376 return ret;
377 }
378
379 return 0;
380 }
381
av_hwframe_transfer_get_formats(AVBufferRef * hwframe_ref,enum AVHWFrameTransferDirection dir,enum AVPixelFormat ** formats,int flags)382 int av_hwframe_transfer_get_formats(AVBufferRef *hwframe_ref,
383 enum AVHWFrameTransferDirection dir,
384 enum AVPixelFormat **formats, int flags)
385 {
386 AVHWFramesContext *ctx = (AVHWFramesContext*)hwframe_ref->data;
387
388 if (!ctx->internal->hw_type->transfer_get_formats)
389 return AVERROR(ENOSYS);
390
391 return ctx->internal->hw_type->transfer_get_formats(ctx, dir, formats);
392 }
393
transfer_data_alloc(AVFrame * dst,const AVFrame * src,int flags)394 static int transfer_data_alloc(AVFrame *dst, const AVFrame *src, int flags)
395 {
396 AVHWFramesContext *ctx = (AVHWFramesContext*)src->hw_frames_ctx->data;
397 AVFrame *frame_tmp;
398 int ret = 0;
399
400 frame_tmp = av_frame_alloc();
401 if (!frame_tmp)
402 return AVERROR(ENOMEM);
403
404 /* if the format is set, use that
405 * otherwise pick the first supported one */
406 if (dst->format >= 0) {
407 frame_tmp->format = dst->format;
408 } else {
409 enum AVPixelFormat *formats;
410
411 ret = av_hwframe_transfer_get_formats(src->hw_frames_ctx,
412 AV_HWFRAME_TRANSFER_DIRECTION_FROM,
413 &formats, 0);
414 if (ret < 0)
415 goto fail;
416 frame_tmp->format = formats[0];
417 av_freep(&formats);
418 }
419 frame_tmp->width = ctx->width;
420 frame_tmp->height = ctx->height;
421
422 ret = av_frame_get_buffer(frame_tmp, 0);
423 if (ret < 0)
424 goto fail;
425
426 ret = av_hwframe_transfer_data(frame_tmp, src, flags);
427 if (ret < 0)
428 goto fail;
429
430 frame_tmp->width = src->width;
431 frame_tmp->height = src->height;
432
433 av_frame_move_ref(dst, frame_tmp);
434
435 fail:
436 av_frame_free(&frame_tmp);
437 return ret;
438 }
439
av_hwframe_transfer_data(AVFrame * dst,const AVFrame * src,int flags)440 int av_hwframe_transfer_data(AVFrame *dst, const AVFrame *src, int flags)
441 {
442 AVHWFramesContext *ctx;
443 int ret;
444
445 if (!dst->buf[0])
446 return transfer_data_alloc(dst, src, flags);
447
448 /*
449 * Hardware -> Hardware Transfer.
450 * Unlike Software -> Hardware or Hardware -> Software, the transfer
451 * function could be provided by either the src or dst, depending on
452 * the specific combination of hardware.
453 */
454 if (src->hw_frames_ctx && dst->hw_frames_ctx) {
455 AVHWFramesContext *src_ctx =
456 (AVHWFramesContext*)src->hw_frames_ctx->data;
457 AVHWFramesContext *dst_ctx =
458 (AVHWFramesContext*)dst->hw_frames_ctx->data;
459
460 if (src_ctx->internal->source_frames) {
461 av_log(src_ctx, AV_LOG_ERROR,
462 "A device with a derived frame context cannot be used as "
463 "the source of a HW -> HW transfer.");
464 return AVERROR(ENOSYS);
465 }
466
467 if (dst_ctx->internal->source_frames) {
468 av_log(src_ctx, AV_LOG_ERROR,
469 "A device with a derived frame context cannot be used as "
470 "the destination of a HW -> HW transfer.");
471 return AVERROR(ENOSYS);
472 }
473
474 ret = src_ctx->internal->hw_type->transfer_data_from(src_ctx, dst, src);
475 if (ret == AVERROR(ENOSYS))
476 ret = dst_ctx->internal->hw_type->transfer_data_to(dst_ctx, dst, src);
477 if (ret < 0)
478 return ret;
479 } else {
480 if (src->hw_frames_ctx) {
481 ctx = (AVHWFramesContext*)src->hw_frames_ctx->data;
482
483 ret = ctx->internal->hw_type->transfer_data_from(ctx, dst, src);
484 if (ret < 0)
485 return ret;
486 } else if (dst->hw_frames_ctx) {
487 ctx = (AVHWFramesContext*)dst->hw_frames_ctx->data;
488
489 ret = ctx->internal->hw_type->transfer_data_to(ctx, dst, src);
490 if (ret < 0)
491 return ret;
492 } else {
493 return AVERROR(ENOSYS);
494 }
495 }
496 return 0;
497 }
498
av_hwframe_get_buffer(AVBufferRef * hwframe_ref,AVFrame * frame,int flags)499 int av_hwframe_get_buffer(AVBufferRef *hwframe_ref, AVFrame *frame, int flags)
500 {
501 AVHWFramesContext *ctx = (AVHWFramesContext*)hwframe_ref->data;
502 int ret;
503
504 if (ctx->internal->source_frames) {
505 // This is a derived frame context, so we allocate in the source
506 // and map the frame immediately.
507 AVFrame *src_frame;
508
509 frame->format = ctx->format;
510 frame->hw_frames_ctx = av_buffer_ref(hwframe_ref);
511 if (!frame->hw_frames_ctx)
512 return AVERROR(ENOMEM);
513
514 src_frame = av_frame_alloc();
515 if (!src_frame)
516 return AVERROR(ENOMEM);
517
518 ret = av_hwframe_get_buffer(ctx->internal->source_frames,
519 src_frame, 0);
520 if (ret < 0) {
521 av_frame_free(&src_frame);
522 return ret;
523 }
524
525 ret = av_hwframe_map(frame, src_frame,
526 ctx->internal->source_allocation_map_flags);
527 if (ret) {
528 av_log(ctx, AV_LOG_ERROR, "Failed to map frame into derived "
529 "frame context: %d.\n", ret);
530 av_frame_free(&src_frame);
531 return ret;
532 }
533
534 // Free the source frame immediately - the mapped frame still
535 // contains a reference to it.
536 av_frame_free(&src_frame);
537
538 return 0;
539 }
540
541 if (!ctx->internal->hw_type->frames_get_buffer)
542 return AVERROR(ENOSYS);
543
544 if (!ctx->pool)
545 return AVERROR(EINVAL);
546
547 frame->hw_frames_ctx = av_buffer_ref(hwframe_ref);
548 if (!frame->hw_frames_ctx)
549 return AVERROR(ENOMEM);
550
551 ret = ctx->internal->hw_type->frames_get_buffer(ctx, frame);
552 if (ret < 0) {
553 av_buffer_unref(&frame->hw_frames_ctx);
554 return ret;
555 }
556
557 frame->extended_data = frame->data;
558
559 return 0;
560 }
561
av_hwdevice_hwconfig_alloc(AVBufferRef * ref)562 void *av_hwdevice_hwconfig_alloc(AVBufferRef *ref)
563 {
564 AVHWDeviceContext *ctx = (AVHWDeviceContext*)ref->data;
565 const HWContextType *hw_type = ctx->internal->hw_type;
566
567 if (hw_type->device_hwconfig_size == 0)
568 return NULL;
569
570 return av_mallocz(hw_type->device_hwconfig_size);
571 }
572
av_hwdevice_get_hwframe_constraints(AVBufferRef * ref,const void * hwconfig)573 AVHWFramesConstraints *av_hwdevice_get_hwframe_constraints(AVBufferRef *ref,
574 const void *hwconfig)
575 {
576 AVHWDeviceContext *ctx = (AVHWDeviceContext*)ref->data;
577 const HWContextType *hw_type = ctx->internal->hw_type;
578 AVHWFramesConstraints *constraints;
579
580 if (!hw_type->frames_get_constraints)
581 return NULL;
582
583 constraints = av_mallocz(sizeof(*constraints));
584 if (!constraints)
585 return NULL;
586
587 constraints->min_width = constraints->min_height = 0;
588 constraints->max_width = constraints->max_height = INT_MAX;
589
590 if (hw_type->frames_get_constraints(ctx, hwconfig, constraints) >= 0) {
591 return constraints;
592 } else {
593 av_hwframe_constraints_free(&constraints);
594 return NULL;
595 }
596 }
597
av_hwframe_constraints_free(AVHWFramesConstraints ** constraints)598 void av_hwframe_constraints_free(AVHWFramesConstraints **constraints)
599 {
600 if (*constraints) {
601 av_freep(&(*constraints)->valid_hw_formats);
602 av_freep(&(*constraints)->valid_sw_formats);
603 }
604 av_freep(constraints);
605 }
606
av_hwdevice_ctx_create(AVBufferRef ** pdevice_ref,enum AVHWDeviceType type,const char * device,AVDictionary * opts,int flags)607 int av_hwdevice_ctx_create(AVBufferRef **pdevice_ref, enum AVHWDeviceType type,
608 const char *device, AVDictionary *opts, int flags)
609 {
610 AVBufferRef *device_ref = NULL;
611 AVHWDeviceContext *device_ctx;
612 int ret = 0;
613
614 device_ref = av_hwdevice_ctx_alloc(type);
615 if (!device_ref) {
616 ret = AVERROR(ENOMEM);
617 goto fail;
618 }
619 device_ctx = (AVHWDeviceContext*)device_ref->data;
620
621 if (!device_ctx->internal->hw_type->device_create) {
622 ret = AVERROR(ENOSYS);
623 goto fail;
624 }
625
626 ret = device_ctx->internal->hw_type->device_create(device_ctx, device,
627 opts, flags);
628 if (ret < 0)
629 goto fail;
630
631 ret = av_hwdevice_ctx_init(device_ref);
632 if (ret < 0)
633 goto fail;
634
635 *pdevice_ref = device_ref;
636 return 0;
637 fail:
638 av_buffer_unref(&device_ref);
639 *pdevice_ref = NULL;
640 return ret;
641 }
642
av_hwdevice_ctx_create_derived_opts(AVBufferRef ** dst_ref_ptr,enum AVHWDeviceType type,AVBufferRef * src_ref,AVDictionary * options,int flags)643 int av_hwdevice_ctx_create_derived_opts(AVBufferRef **dst_ref_ptr,
644 enum AVHWDeviceType type,
645 AVBufferRef *src_ref,
646 AVDictionary *options, int flags)
647 {
648 AVBufferRef *dst_ref = NULL, *tmp_ref;
649 AVHWDeviceContext *dst_ctx, *tmp_ctx;
650 int ret = 0;
651
652 tmp_ref = src_ref;
653 while (tmp_ref) {
654 tmp_ctx = (AVHWDeviceContext*)tmp_ref->data;
655 if (tmp_ctx->type == type) {
656 dst_ref = av_buffer_ref(tmp_ref);
657 if (!dst_ref) {
658 ret = AVERROR(ENOMEM);
659 goto fail;
660 }
661 goto done;
662 }
663 tmp_ref = tmp_ctx->internal->source_device;
664 }
665
666 dst_ref = av_hwdevice_ctx_alloc(type);
667 if (!dst_ref) {
668 ret = AVERROR(ENOMEM);
669 goto fail;
670 }
671 dst_ctx = (AVHWDeviceContext*)dst_ref->data;
672
673 tmp_ref = src_ref;
674 while (tmp_ref) {
675 tmp_ctx = (AVHWDeviceContext*)tmp_ref->data;
676 if (dst_ctx->internal->hw_type->device_derive) {
677 ret = dst_ctx->internal->hw_type->device_derive(dst_ctx,
678 tmp_ctx,
679 options,
680 flags);
681 if (ret == 0) {
682 dst_ctx->internal->source_device = av_buffer_ref(src_ref);
683 if (!dst_ctx->internal->source_device) {
684 ret = AVERROR(ENOMEM);
685 goto fail;
686 }
687 ret = av_hwdevice_ctx_init(dst_ref);
688 if (ret < 0)
689 goto fail;
690 goto done;
691 }
692 if (ret != AVERROR(ENOSYS))
693 goto fail;
694 }
695 tmp_ref = tmp_ctx->internal->source_device;
696 }
697
698 ret = AVERROR(ENOSYS);
699 goto fail;
700
701 done:
702 *dst_ref_ptr = dst_ref;
703 return 0;
704
705 fail:
706 av_buffer_unref(&dst_ref);
707 *dst_ref_ptr = NULL;
708 return ret;
709 }
710
av_hwdevice_ctx_create_derived(AVBufferRef ** dst_ref_ptr,enum AVHWDeviceType type,AVBufferRef * src_ref,int flags)711 int av_hwdevice_ctx_create_derived(AVBufferRef **dst_ref_ptr,
712 enum AVHWDeviceType type,
713 AVBufferRef *src_ref, int flags)
714 {
715 return av_hwdevice_ctx_create_derived_opts(dst_ref_ptr, type, src_ref,
716 NULL, flags);
717 }
718
ff_hwframe_unmap(void * opaque,uint8_t * data)719 static void ff_hwframe_unmap(void *opaque, uint8_t *data)
720 {
721 HWMapDescriptor *hwmap = (HWMapDescriptor*)data;
722 AVHWFramesContext *ctx = opaque;
723
724 if (hwmap->unmap)
725 hwmap->unmap(ctx, hwmap);
726
727 av_frame_free(&hwmap->source);
728
729 av_buffer_unref(&hwmap->hw_frames_ctx);
730
731 av_free(hwmap);
732 }
733
ff_hwframe_map_create(AVBufferRef * hwframe_ref,AVFrame * dst,const AVFrame * src,void (* unmap)(AVHWFramesContext * ctx,HWMapDescriptor * hwmap),void * priv)734 int ff_hwframe_map_create(AVBufferRef *hwframe_ref,
735 AVFrame *dst, const AVFrame *src,
736 void (*unmap)(AVHWFramesContext *ctx,
737 HWMapDescriptor *hwmap),
738 void *priv)
739 {
740 AVHWFramesContext *ctx = (AVHWFramesContext*)hwframe_ref->data;
741 HWMapDescriptor *hwmap;
742 int ret;
743
744 hwmap = av_mallocz(sizeof(*hwmap));
745 if (!hwmap) {
746 ret = AVERROR(ENOMEM);
747 goto fail;
748 }
749
750 hwmap->source = av_frame_alloc();
751 if (!hwmap->source) {
752 ret = AVERROR(ENOMEM);
753 goto fail;
754 }
755 ret = av_frame_ref(hwmap->source, src);
756 if (ret < 0)
757 goto fail;
758
759 hwmap->hw_frames_ctx = av_buffer_ref(hwframe_ref);
760 if (!hwmap->hw_frames_ctx) {
761 ret = AVERROR(ENOMEM);
762 goto fail;
763 }
764
765 hwmap->unmap = unmap;
766 hwmap->priv = priv;
767
768 dst->buf[0] = av_buffer_create((uint8_t*)hwmap, sizeof(*hwmap),
769 &ff_hwframe_unmap, ctx, 0);
770 if (!dst->buf[0]) {
771 ret = AVERROR(ENOMEM);
772 goto fail;
773 }
774
775 return 0;
776
777 fail:
778 if (hwmap) {
779 av_buffer_unref(&hwmap->hw_frames_ctx);
780 av_frame_free(&hwmap->source);
781 }
782 av_free(hwmap);
783 return ret;
784 }
785
av_hwframe_map(AVFrame * dst,const AVFrame * src,int flags)786 int av_hwframe_map(AVFrame *dst, const AVFrame *src, int flags)
787 {
788 AVBufferRef *orig_dst_frames = dst->hw_frames_ctx;
789 enum AVPixelFormat orig_dst_fmt = dst->format;
790 AVHWFramesContext *src_frames, *dst_frames;
791 HWMapDescriptor *hwmap;
792 int ret;
793
794 if (src->hw_frames_ctx && dst->hw_frames_ctx) {
795 src_frames = (AVHWFramesContext*)src->hw_frames_ctx->data;
796 dst_frames = (AVHWFramesContext*)dst->hw_frames_ctx->data;
797
798 if ((src_frames == dst_frames &&
799 src->format == dst_frames->sw_format &&
800 dst->format == dst_frames->format) ||
801 (src_frames->internal->source_frames &&
802 src_frames->internal->source_frames->data ==
803 (uint8_t*)dst_frames)) {
804 // This is an unmap operation. We don't need to directly
805 // do anything here other than fill in the original frame,
806 // because the real unmap will be invoked when the last
807 // reference to the mapped frame disappears.
808 if (!src->buf[0]) {
809 av_log(src_frames, AV_LOG_ERROR, "Invalid mapping "
810 "found when attempting unmap.\n");
811 return AVERROR(EINVAL);
812 }
813 hwmap = (HWMapDescriptor*)src->buf[0]->data;
814 av_frame_unref(dst);
815 return av_frame_ref(dst, hwmap->source);
816 }
817 }
818
819 if (src->hw_frames_ctx) {
820 src_frames = (AVHWFramesContext*)src->hw_frames_ctx->data;
821
822 if (src_frames->format == src->format &&
823 src_frames->internal->hw_type->map_from) {
824 ret = src_frames->internal->hw_type->map_from(src_frames,
825 dst, src, flags);
826 if (ret >= 0)
827 return ret;
828 else if (ret != AVERROR(ENOSYS))
829 goto fail;
830 }
831 }
832
833 if (dst->hw_frames_ctx) {
834 dst_frames = (AVHWFramesContext*)dst->hw_frames_ctx->data;
835
836 if (dst_frames->format == dst->format &&
837 dst_frames->internal->hw_type->map_to) {
838 ret = dst_frames->internal->hw_type->map_to(dst_frames,
839 dst, src, flags);
840 if (ret >= 0)
841 return ret;
842 else if (ret != AVERROR(ENOSYS))
843 goto fail;
844 }
845 }
846
847 return AVERROR(ENOSYS);
848
849 fail:
850 // if the caller provided dst frames context, it should be preserved
851 // by this function
852 av_assert0(orig_dst_frames == NULL ||
853 orig_dst_frames == dst->hw_frames_ctx);
854
855 // preserve user-provided dst frame fields, but clean
856 // anything we might have set
857 dst->hw_frames_ctx = NULL;
858 av_frame_unref(dst);
859
860 dst->hw_frames_ctx = orig_dst_frames;
861 dst->format = orig_dst_fmt;
862
863 return ret;
864 }
865
av_hwframe_ctx_create_derived(AVBufferRef ** derived_frame_ctx,enum AVPixelFormat format,AVBufferRef * derived_device_ctx,AVBufferRef * source_frame_ctx,int flags)866 int av_hwframe_ctx_create_derived(AVBufferRef **derived_frame_ctx,
867 enum AVPixelFormat format,
868 AVBufferRef *derived_device_ctx,
869 AVBufferRef *source_frame_ctx,
870 int flags)
871 {
872 AVBufferRef *dst_ref = NULL;
873 AVHWFramesContext *dst = NULL;
874 AVHWFramesContext *src = (AVHWFramesContext*)source_frame_ctx->data;
875 int ret;
876
877 if (src->internal->source_frames) {
878 AVHWFramesContext *src_src =
879 (AVHWFramesContext*)src->internal->source_frames->data;
880 AVHWDeviceContext *dst_dev =
881 (AVHWDeviceContext*)derived_device_ctx->data;
882
883 if (src_src->device_ctx == dst_dev) {
884 // This is actually an unmapping, so we just return a
885 // reference to the source frame context.
886 *derived_frame_ctx =
887 av_buffer_ref(src->internal->source_frames);
888 if (!*derived_frame_ctx) {
889 ret = AVERROR(ENOMEM);
890 goto fail;
891 }
892 return 0;
893 }
894 }
895
896 dst_ref = av_hwframe_ctx_alloc(derived_device_ctx);
897 if (!dst_ref) {
898 ret = AVERROR(ENOMEM);
899 goto fail;
900 }
901
902 dst = (AVHWFramesContext*)dst_ref->data;
903
904 dst->format = format;
905 dst->sw_format = src->sw_format;
906 dst->width = src->width;
907 dst->height = src->height;
908
909 dst->internal->source_frames = av_buffer_ref(source_frame_ctx);
910 if (!dst->internal->source_frames) {
911 ret = AVERROR(ENOMEM);
912 goto fail;
913 }
914
915 dst->internal->source_allocation_map_flags =
916 flags & (AV_HWFRAME_MAP_READ |
917 AV_HWFRAME_MAP_WRITE |
918 AV_HWFRAME_MAP_OVERWRITE |
919 AV_HWFRAME_MAP_DIRECT);
920
921 ret = AVERROR(ENOSYS);
922 if (src->internal->hw_type->frames_derive_from)
923 ret = src->internal->hw_type->frames_derive_from(dst, src, flags);
924 if (ret == AVERROR(ENOSYS) &&
925 dst->internal->hw_type->frames_derive_to)
926 ret = dst->internal->hw_type->frames_derive_to(dst, src, flags);
927 if (ret == AVERROR(ENOSYS))
928 ret = 0;
929 if (ret)
930 goto fail;
931
932 *derived_frame_ctx = dst_ref;
933 return 0;
934
935 fail:
936 if (dst)
937 av_buffer_unref(&dst->internal->source_frames);
938 av_buffer_unref(&dst_ref);
939 return ret;
940 }
941
ff_hwframe_map_replace(AVFrame * dst,const AVFrame * src)942 int ff_hwframe_map_replace(AVFrame *dst, const AVFrame *src)
943 {
944 HWMapDescriptor *hwmap = (HWMapDescriptor*)dst->buf[0]->data;
945 av_frame_unref(hwmap->source);
946 return av_frame_ref(hwmap->source, src);
947 }
948