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 goto fail;
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 goto fail;
377 }
378
379 return 0;
380 fail:
381 if (ctx->internal->hw_type->frames_uninit)
382 ctx->internal->hw_type->frames_uninit(ctx);
383 return ret;
384 }
385
av_hwframe_transfer_get_formats(AVBufferRef * hwframe_ref,enum AVHWFrameTransferDirection dir,enum AVPixelFormat ** formats,int flags)386 int av_hwframe_transfer_get_formats(AVBufferRef *hwframe_ref,
387 enum AVHWFrameTransferDirection dir,
388 enum AVPixelFormat **formats, int flags)
389 {
390 AVHWFramesContext *ctx = (AVHWFramesContext*)hwframe_ref->data;
391
392 if (!ctx->internal->hw_type->transfer_get_formats)
393 return AVERROR(ENOSYS);
394
395 return ctx->internal->hw_type->transfer_get_formats(ctx, dir, formats);
396 }
397
transfer_data_alloc(AVFrame * dst,const AVFrame * src,int flags)398 static int transfer_data_alloc(AVFrame *dst, const AVFrame *src, int flags)
399 {
400 AVHWFramesContext *ctx = (AVHWFramesContext*)src->hw_frames_ctx->data;
401 AVFrame *frame_tmp;
402 int ret = 0;
403
404 frame_tmp = av_frame_alloc();
405 if (!frame_tmp)
406 return AVERROR(ENOMEM);
407
408 /* if the format is set, use that
409 * otherwise pick the first supported one */
410 if (dst->format >= 0) {
411 frame_tmp->format = dst->format;
412 } else {
413 enum AVPixelFormat *formats;
414
415 ret = av_hwframe_transfer_get_formats(src->hw_frames_ctx,
416 AV_HWFRAME_TRANSFER_DIRECTION_FROM,
417 &formats, 0);
418 if (ret < 0)
419 goto fail;
420 frame_tmp->format = formats[0];
421 av_freep(&formats);
422 }
423 frame_tmp->width = ctx->width;
424 frame_tmp->height = ctx->height;
425
426 ret = av_frame_get_buffer(frame_tmp, 0);
427 if (ret < 0)
428 goto fail;
429
430 ret = av_hwframe_transfer_data(frame_tmp, src, flags);
431 if (ret < 0)
432 goto fail;
433
434 frame_tmp->width = src->width;
435 frame_tmp->height = src->height;
436
437 av_frame_move_ref(dst, frame_tmp);
438
439 fail:
440 av_frame_free(&frame_tmp);
441 return ret;
442 }
443
av_hwframe_transfer_data(AVFrame * dst,const AVFrame * src,int flags)444 int av_hwframe_transfer_data(AVFrame *dst, const AVFrame *src, int flags)
445 {
446 AVHWFramesContext *ctx;
447 int ret;
448
449 if (!dst->buf[0])
450 return transfer_data_alloc(dst, src, flags);
451
452 /*
453 * Hardware -> Hardware Transfer.
454 * Unlike Software -> Hardware or Hardware -> Software, the transfer
455 * function could be provided by either the src or dst, depending on
456 * the specific combination of hardware.
457 */
458 if (src->hw_frames_ctx && dst->hw_frames_ctx) {
459 AVHWFramesContext *src_ctx =
460 (AVHWFramesContext*)src->hw_frames_ctx->data;
461 AVHWFramesContext *dst_ctx =
462 (AVHWFramesContext*)dst->hw_frames_ctx->data;
463
464 if (src_ctx->internal->source_frames) {
465 av_log(src_ctx, AV_LOG_ERROR,
466 "A device with a derived frame context cannot be used as "
467 "the source of a HW -> HW transfer.");
468 return AVERROR(ENOSYS);
469 }
470
471 if (dst_ctx->internal->source_frames) {
472 av_log(src_ctx, AV_LOG_ERROR,
473 "A device with a derived frame context cannot be used as "
474 "the destination of a HW -> HW transfer.");
475 return AVERROR(ENOSYS);
476 }
477
478 ret = src_ctx->internal->hw_type->transfer_data_from(src_ctx, dst, src);
479 if (ret == AVERROR(ENOSYS))
480 ret = dst_ctx->internal->hw_type->transfer_data_to(dst_ctx, dst, src);
481 if (ret < 0)
482 return ret;
483 } else {
484 if (src->hw_frames_ctx) {
485 ctx = (AVHWFramesContext*)src->hw_frames_ctx->data;
486
487 ret = ctx->internal->hw_type->transfer_data_from(ctx, dst, src);
488 if (ret < 0)
489 return ret;
490 } else if (dst->hw_frames_ctx) {
491 ctx = (AVHWFramesContext*)dst->hw_frames_ctx->data;
492
493 ret = ctx->internal->hw_type->transfer_data_to(ctx, dst, src);
494 if (ret < 0)
495 return ret;
496 } else {
497 return AVERROR(ENOSYS);
498 }
499 }
500 return 0;
501 }
502
av_hwframe_get_buffer(AVBufferRef * hwframe_ref,AVFrame * frame,int flags)503 int av_hwframe_get_buffer(AVBufferRef *hwframe_ref, AVFrame *frame, int flags)
504 {
505 AVHWFramesContext *ctx = (AVHWFramesContext*)hwframe_ref->data;
506 int ret;
507
508 if (ctx->internal->source_frames) {
509 // This is a derived frame context, so we allocate in the source
510 // and map the frame immediately.
511 AVFrame *src_frame;
512
513 frame->format = ctx->format;
514 frame->hw_frames_ctx = av_buffer_ref(hwframe_ref);
515 if (!frame->hw_frames_ctx)
516 return AVERROR(ENOMEM);
517
518 src_frame = av_frame_alloc();
519 if (!src_frame)
520 return AVERROR(ENOMEM);
521
522 ret = av_hwframe_get_buffer(ctx->internal->source_frames,
523 src_frame, 0);
524 if (ret < 0) {
525 av_frame_free(&src_frame);
526 return ret;
527 }
528
529 ret = av_hwframe_map(frame, src_frame,
530 ctx->internal->source_allocation_map_flags);
531 if (ret) {
532 av_log(ctx, AV_LOG_ERROR, "Failed to map frame into derived "
533 "frame context: %d.\n", ret);
534 av_frame_free(&src_frame);
535 return ret;
536 }
537
538 // Free the source frame immediately - the mapped frame still
539 // contains a reference to it.
540 av_frame_free(&src_frame);
541
542 return 0;
543 }
544
545 if (!ctx->internal->hw_type->frames_get_buffer)
546 return AVERROR(ENOSYS);
547
548 if (!ctx->pool)
549 return AVERROR(EINVAL);
550
551 frame->hw_frames_ctx = av_buffer_ref(hwframe_ref);
552 if (!frame->hw_frames_ctx)
553 return AVERROR(ENOMEM);
554
555 ret = ctx->internal->hw_type->frames_get_buffer(ctx, frame);
556 if (ret < 0) {
557 av_buffer_unref(&frame->hw_frames_ctx);
558 return ret;
559 }
560
561 frame->extended_data = frame->data;
562
563 return 0;
564 }
565
av_hwdevice_hwconfig_alloc(AVBufferRef * ref)566 void *av_hwdevice_hwconfig_alloc(AVBufferRef *ref)
567 {
568 AVHWDeviceContext *ctx = (AVHWDeviceContext*)ref->data;
569 const HWContextType *hw_type = ctx->internal->hw_type;
570
571 if (hw_type->device_hwconfig_size == 0)
572 return NULL;
573
574 return av_mallocz(hw_type->device_hwconfig_size);
575 }
576
av_hwdevice_get_hwframe_constraints(AVBufferRef * ref,const void * hwconfig)577 AVHWFramesConstraints *av_hwdevice_get_hwframe_constraints(AVBufferRef *ref,
578 const void *hwconfig)
579 {
580 AVHWDeviceContext *ctx = (AVHWDeviceContext*)ref->data;
581 const HWContextType *hw_type = ctx->internal->hw_type;
582 AVHWFramesConstraints *constraints;
583
584 if (!hw_type->frames_get_constraints)
585 return NULL;
586
587 constraints = av_mallocz(sizeof(*constraints));
588 if (!constraints)
589 return NULL;
590
591 constraints->min_width = constraints->min_height = 0;
592 constraints->max_width = constraints->max_height = INT_MAX;
593
594 if (hw_type->frames_get_constraints(ctx, hwconfig, constraints) >= 0) {
595 return constraints;
596 } else {
597 av_hwframe_constraints_free(&constraints);
598 return NULL;
599 }
600 }
601
av_hwframe_constraints_free(AVHWFramesConstraints ** constraints)602 void av_hwframe_constraints_free(AVHWFramesConstraints **constraints)
603 {
604 if (*constraints) {
605 av_freep(&(*constraints)->valid_hw_formats);
606 av_freep(&(*constraints)->valid_sw_formats);
607 }
608 av_freep(constraints);
609 }
610
av_hwdevice_ctx_create(AVBufferRef ** pdevice_ref,enum AVHWDeviceType type,const char * device,AVDictionary * opts,int flags)611 int av_hwdevice_ctx_create(AVBufferRef **pdevice_ref, enum AVHWDeviceType type,
612 const char *device, AVDictionary *opts, int flags)
613 {
614 AVBufferRef *device_ref = NULL;
615 AVHWDeviceContext *device_ctx;
616 int ret = 0;
617
618 device_ref = av_hwdevice_ctx_alloc(type);
619 if (!device_ref) {
620 ret = AVERROR(ENOMEM);
621 goto fail;
622 }
623 device_ctx = (AVHWDeviceContext*)device_ref->data;
624
625 if (!device_ctx->internal->hw_type->device_create) {
626 ret = AVERROR(ENOSYS);
627 goto fail;
628 }
629
630 ret = device_ctx->internal->hw_type->device_create(device_ctx, device,
631 opts, flags);
632 if (ret < 0)
633 goto fail;
634
635 ret = av_hwdevice_ctx_init(device_ref);
636 if (ret < 0)
637 goto fail;
638
639 *pdevice_ref = device_ref;
640 return 0;
641 fail:
642 av_buffer_unref(&device_ref);
643 *pdevice_ref = NULL;
644 return ret;
645 }
646
av_hwdevice_ctx_create_derived_opts(AVBufferRef ** dst_ref_ptr,enum AVHWDeviceType type,AVBufferRef * src_ref,AVDictionary * options,int flags)647 int av_hwdevice_ctx_create_derived_opts(AVBufferRef **dst_ref_ptr,
648 enum AVHWDeviceType type,
649 AVBufferRef *src_ref,
650 AVDictionary *options, int flags)
651 {
652 AVBufferRef *dst_ref = NULL, *tmp_ref;
653 AVHWDeviceContext *dst_ctx, *tmp_ctx;
654 int ret = 0;
655
656 tmp_ref = src_ref;
657 while (tmp_ref) {
658 tmp_ctx = (AVHWDeviceContext*)tmp_ref->data;
659 if (tmp_ctx->type == type) {
660 dst_ref = av_buffer_ref(tmp_ref);
661 if (!dst_ref) {
662 ret = AVERROR(ENOMEM);
663 goto fail;
664 }
665 goto done;
666 }
667 tmp_ref = tmp_ctx->internal->source_device;
668 }
669
670 dst_ref = av_hwdevice_ctx_alloc(type);
671 if (!dst_ref) {
672 ret = AVERROR(ENOMEM);
673 goto fail;
674 }
675 dst_ctx = (AVHWDeviceContext*)dst_ref->data;
676
677 tmp_ref = src_ref;
678 while (tmp_ref) {
679 tmp_ctx = (AVHWDeviceContext*)tmp_ref->data;
680 if (dst_ctx->internal->hw_type->device_derive) {
681 ret = dst_ctx->internal->hw_type->device_derive(dst_ctx,
682 tmp_ctx,
683 options,
684 flags);
685 if (ret == 0) {
686 dst_ctx->internal->source_device = av_buffer_ref(src_ref);
687 if (!dst_ctx->internal->source_device) {
688 ret = AVERROR(ENOMEM);
689 goto fail;
690 }
691 ret = av_hwdevice_ctx_init(dst_ref);
692 if (ret < 0)
693 goto fail;
694 goto done;
695 }
696 if (ret != AVERROR(ENOSYS))
697 goto fail;
698 }
699 tmp_ref = tmp_ctx->internal->source_device;
700 }
701
702 ret = AVERROR(ENOSYS);
703 goto fail;
704
705 done:
706 *dst_ref_ptr = dst_ref;
707 return 0;
708
709 fail:
710 av_buffer_unref(&dst_ref);
711 *dst_ref_ptr = NULL;
712 return ret;
713 }
714
av_hwdevice_ctx_create_derived(AVBufferRef ** dst_ref_ptr,enum AVHWDeviceType type,AVBufferRef * src_ref,int flags)715 int av_hwdevice_ctx_create_derived(AVBufferRef **dst_ref_ptr,
716 enum AVHWDeviceType type,
717 AVBufferRef *src_ref, int flags)
718 {
719 return av_hwdevice_ctx_create_derived_opts(dst_ref_ptr, type, src_ref,
720 NULL, flags);
721 }
722
ff_hwframe_unmap(void * opaque,uint8_t * data)723 static void ff_hwframe_unmap(void *opaque, uint8_t *data)
724 {
725 HWMapDescriptor *hwmap = (HWMapDescriptor*)data;
726 AVHWFramesContext *ctx = opaque;
727
728 if (hwmap->unmap)
729 hwmap->unmap(ctx, hwmap);
730
731 av_frame_free(&hwmap->source);
732
733 av_buffer_unref(&hwmap->hw_frames_ctx);
734
735 av_free(hwmap);
736 }
737
ff_hwframe_map_create(AVBufferRef * hwframe_ref,AVFrame * dst,const AVFrame * src,void (* unmap)(AVHWFramesContext * ctx,HWMapDescriptor * hwmap),void * priv)738 int ff_hwframe_map_create(AVBufferRef *hwframe_ref,
739 AVFrame *dst, const AVFrame *src,
740 void (*unmap)(AVHWFramesContext *ctx,
741 HWMapDescriptor *hwmap),
742 void *priv)
743 {
744 AVHWFramesContext *ctx = (AVHWFramesContext*)hwframe_ref->data;
745 HWMapDescriptor *hwmap;
746 int ret;
747
748 hwmap = av_mallocz(sizeof(*hwmap));
749 if (!hwmap) {
750 ret = AVERROR(ENOMEM);
751 goto fail;
752 }
753
754 hwmap->source = av_frame_alloc();
755 if (!hwmap->source) {
756 ret = AVERROR(ENOMEM);
757 goto fail;
758 }
759 ret = av_frame_ref(hwmap->source, src);
760 if (ret < 0)
761 goto fail;
762
763 hwmap->hw_frames_ctx = av_buffer_ref(hwframe_ref);
764 if (!hwmap->hw_frames_ctx) {
765 ret = AVERROR(ENOMEM);
766 goto fail;
767 }
768
769 hwmap->unmap = unmap;
770 hwmap->priv = priv;
771
772 dst->buf[0] = av_buffer_create((uint8_t*)hwmap, sizeof(*hwmap),
773 &ff_hwframe_unmap, ctx, 0);
774 if (!dst->buf[0]) {
775 ret = AVERROR(ENOMEM);
776 goto fail;
777 }
778
779 return 0;
780
781 fail:
782 if (hwmap) {
783 av_buffer_unref(&hwmap->hw_frames_ctx);
784 av_frame_free(&hwmap->source);
785 }
786 av_free(hwmap);
787 return ret;
788 }
789
av_hwframe_map(AVFrame * dst,const AVFrame * src,int flags)790 int av_hwframe_map(AVFrame *dst, const AVFrame *src, int flags)
791 {
792 AVBufferRef *orig_dst_frames = dst->hw_frames_ctx;
793 enum AVPixelFormat orig_dst_fmt = dst->format;
794 AVHWFramesContext *src_frames, *dst_frames;
795 HWMapDescriptor *hwmap;
796 int ret;
797
798 if (src->hw_frames_ctx && dst->hw_frames_ctx) {
799 src_frames = (AVHWFramesContext*)src->hw_frames_ctx->data;
800 dst_frames = (AVHWFramesContext*)dst->hw_frames_ctx->data;
801
802 if ((src_frames == dst_frames &&
803 src->format == dst_frames->sw_format &&
804 dst->format == dst_frames->format) ||
805 (src_frames->internal->source_frames &&
806 src_frames->internal->source_frames->data ==
807 (uint8_t*)dst_frames)) {
808 // This is an unmap operation. We don't need to directly
809 // do anything here other than fill in the original frame,
810 // because the real unmap will be invoked when the last
811 // reference to the mapped frame disappears.
812 if (!src->buf[0]) {
813 av_log(src_frames, AV_LOG_ERROR, "Invalid mapping "
814 "found when attempting unmap.\n");
815 return AVERROR(EINVAL);
816 }
817 hwmap = (HWMapDescriptor*)src->buf[0]->data;
818 av_frame_unref(dst);
819 return av_frame_ref(dst, hwmap->source);
820 }
821 }
822
823 if (src->hw_frames_ctx) {
824 src_frames = (AVHWFramesContext*)src->hw_frames_ctx->data;
825
826 if (src_frames->format == src->format &&
827 src_frames->internal->hw_type->map_from) {
828 ret = src_frames->internal->hw_type->map_from(src_frames,
829 dst, src, flags);
830 if (ret >= 0)
831 return ret;
832 else if (ret != AVERROR(ENOSYS))
833 goto fail;
834 }
835 }
836
837 if (dst->hw_frames_ctx) {
838 dst_frames = (AVHWFramesContext*)dst->hw_frames_ctx->data;
839
840 if (dst_frames->format == dst->format &&
841 dst_frames->internal->hw_type->map_to) {
842 ret = dst_frames->internal->hw_type->map_to(dst_frames,
843 dst, src, flags);
844 if (ret >= 0)
845 return ret;
846 else if (ret != AVERROR(ENOSYS))
847 goto fail;
848 }
849 }
850
851 return AVERROR(ENOSYS);
852
853 fail:
854 // if the caller provided dst frames context, it should be preserved
855 // by this function
856 av_assert0(orig_dst_frames == NULL ||
857 orig_dst_frames == dst->hw_frames_ctx);
858
859 // preserve user-provided dst frame fields, but clean
860 // anything we might have set
861 dst->hw_frames_ctx = NULL;
862 av_frame_unref(dst);
863
864 dst->hw_frames_ctx = orig_dst_frames;
865 dst->format = orig_dst_fmt;
866
867 return ret;
868 }
869
av_hwframe_ctx_create_derived(AVBufferRef ** derived_frame_ctx,enum AVPixelFormat format,AVBufferRef * derived_device_ctx,AVBufferRef * source_frame_ctx,int flags)870 int av_hwframe_ctx_create_derived(AVBufferRef **derived_frame_ctx,
871 enum AVPixelFormat format,
872 AVBufferRef *derived_device_ctx,
873 AVBufferRef *source_frame_ctx,
874 int flags)
875 {
876 AVBufferRef *dst_ref = NULL;
877 AVHWFramesContext *dst = NULL;
878 AVHWFramesContext *src = (AVHWFramesContext*)source_frame_ctx->data;
879 int ret;
880
881 if (src->internal->source_frames) {
882 AVHWFramesContext *src_src =
883 (AVHWFramesContext*)src->internal->source_frames->data;
884 AVHWDeviceContext *dst_dev =
885 (AVHWDeviceContext*)derived_device_ctx->data;
886
887 if (src_src->device_ctx == dst_dev) {
888 // This is actually an unmapping, so we just return a
889 // reference to the source frame context.
890 *derived_frame_ctx =
891 av_buffer_ref(src->internal->source_frames);
892 if (!*derived_frame_ctx) {
893 ret = AVERROR(ENOMEM);
894 goto fail;
895 }
896 return 0;
897 }
898 }
899
900 dst_ref = av_hwframe_ctx_alloc(derived_device_ctx);
901 if (!dst_ref) {
902 ret = AVERROR(ENOMEM);
903 goto fail;
904 }
905
906 dst = (AVHWFramesContext*)dst_ref->data;
907
908 dst->format = format;
909 dst->sw_format = src->sw_format;
910 dst->width = src->width;
911 dst->height = src->height;
912
913 dst->internal->source_frames = av_buffer_ref(source_frame_ctx);
914 if (!dst->internal->source_frames) {
915 ret = AVERROR(ENOMEM);
916 goto fail;
917 }
918
919 dst->internal->source_allocation_map_flags =
920 flags & (AV_HWFRAME_MAP_READ |
921 AV_HWFRAME_MAP_WRITE |
922 AV_HWFRAME_MAP_OVERWRITE |
923 AV_HWFRAME_MAP_DIRECT);
924
925 ret = AVERROR(ENOSYS);
926 if (src->internal->hw_type->frames_derive_from)
927 ret = src->internal->hw_type->frames_derive_from(dst, src, flags);
928 if (ret == AVERROR(ENOSYS) &&
929 dst->internal->hw_type->frames_derive_to)
930 ret = dst->internal->hw_type->frames_derive_to(dst, src, flags);
931 if (ret == AVERROR(ENOSYS))
932 ret = 0;
933 if (ret)
934 goto fail;
935
936 *derived_frame_ctx = dst_ref;
937 return 0;
938
939 fail:
940 if (dst)
941 av_buffer_unref(&dst->internal->source_frames);
942 av_buffer_unref(&dst_ref);
943 return ret;
944 }
945
ff_hwframe_map_replace(AVFrame * dst,const AVFrame * src)946 int ff_hwframe_map_replace(AVFrame *dst, const AVFrame *src)
947 {
948 HWMapDescriptor *hwmap = (HWMapDescriptor*)dst->buf[0]->data;
949 av_frame_unref(hwmap->source);
950 return av_frame_ref(hwmap->source, src);
951 }
952