2 * This file is part of FFmpeg.
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.
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.
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
23 #include "hwcontext.h"
24 #include "hwcontext_internal.h"
31 static const HWContextType *hw_table[] = {
33 &ff_hwcontext_type_cuda,
36 &ff_hwcontext_type_vdpau,
41 static const AVClass hwdevice_ctx_class = {
42 .class_name = "AVHWDeviceContext",
43 .item_name = av_default_item_name,
44 .version = LIBAVUTIL_VERSION_INT,
47 static void hwdevice_ctx_free(void *opaque, uint8_t *data)
49 AVHWDeviceContext *ctx = (AVHWDeviceContext*)data;
51 /* uninit might still want access the hw context and the user
52 * free() callback might destroy it, so uninit has to be called first */
53 if (ctx->internal->hw_type->device_uninit)
54 ctx->internal->hw_type->device_uninit(ctx);
59 av_freep(&ctx->hwctx);
60 av_freep(&ctx->internal->priv);
61 av_freep(&ctx->internal);
65 AVBufferRef *av_hwdevice_ctx_alloc(enum AVHWDeviceType type)
67 AVHWDeviceContext *ctx;
69 const HWContextType *hw_type = NULL;
72 for (i = 0; hw_table[i]; i++) {
73 if (hw_table[i]->type == type) {
74 hw_type = hw_table[i];
81 ctx = av_mallocz(sizeof(*ctx));
85 ctx->internal = av_mallocz(sizeof(*ctx->internal));
89 if (hw_type->device_priv_size) {
90 ctx->internal->priv = av_mallocz(hw_type->device_priv_size);
91 if (!ctx->internal->priv)
95 if (hw_type->device_hwctx_size) {
96 ctx->hwctx = av_mallocz(hw_type->device_hwctx_size);
101 buf = av_buffer_create((uint8_t*)ctx, sizeof(*ctx),
102 hwdevice_ctx_free, NULL,
103 AV_BUFFER_FLAG_READONLY);
108 ctx->av_class = &hwdevice_ctx_class;
110 ctx->internal->hw_type = hw_type;
116 av_freep(&ctx->internal->priv);
117 av_freep(&ctx->internal);
118 av_freep(&ctx->hwctx);
123 int av_hwdevice_ctx_init(AVBufferRef *ref)
125 AVHWDeviceContext *ctx = (AVHWDeviceContext*)ref->data;
128 if (ctx->internal->hw_type->device_init) {
129 ret = ctx->internal->hw_type->device_init(ctx);
136 if (ctx->internal->hw_type->device_uninit)
137 ctx->internal->hw_type->device_uninit(ctx);
141 static const AVClass hwframe_ctx_class = {
142 .class_name = "AVHWFramesContext",
143 .item_name = av_default_item_name,
144 .version = LIBAVUTIL_VERSION_INT,
147 static void hwframe_ctx_free(void *opaque, uint8_t *data)
149 AVHWFramesContext *ctx = (AVHWFramesContext*)data;
151 if (ctx->internal->pool_internal)
152 av_buffer_pool_uninit(&ctx->internal->pool_internal);
154 if (ctx->internal->hw_type->frames_uninit)
155 ctx->internal->hw_type->frames_uninit(ctx);
160 av_buffer_unref(&ctx->device_ref);
162 av_freep(&ctx->hwctx);
163 av_freep(&ctx->internal->priv);
164 av_freep(&ctx->internal);
168 AVBufferRef *av_hwframe_ctx_alloc(AVBufferRef *device_ref_in)
170 AVHWDeviceContext *device_ctx = (AVHWDeviceContext*)device_ref_in->data;
171 const HWContextType *hw_type = device_ctx->internal->hw_type;
172 AVHWFramesContext *ctx;
173 AVBufferRef *buf, *device_ref = NULL;
175 ctx = av_mallocz(sizeof(*ctx));
179 ctx->internal = av_mallocz(sizeof(*ctx->internal));
183 if (hw_type->frames_priv_size) {
184 ctx->internal->priv = av_mallocz(hw_type->frames_priv_size);
185 if (!ctx->internal->priv)
189 if (hw_type->frames_hwctx_size) {
190 ctx->hwctx = av_mallocz(hw_type->frames_hwctx_size);
195 device_ref = av_buffer_ref(device_ref_in);
199 buf = av_buffer_create((uint8_t*)ctx, sizeof(*ctx),
200 hwframe_ctx_free, NULL,
201 AV_BUFFER_FLAG_READONLY);
205 ctx->av_class = &hwframe_ctx_class;
206 ctx->device_ref = device_ref;
207 ctx->device_ctx = device_ctx;
208 ctx->format = AV_PIX_FMT_NONE;
210 ctx->internal->hw_type = hw_type;
216 av_buffer_unref(&device_ref);
218 av_freep(&ctx->internal->priv);
219 av_freep(&ctx->internal);
220 av_freep(&ctx->hwctx);
225 static int hwframe_pool_prealloc(AVBufferRef *ref)
227 AVHWFramesContext *ctx = (AVHWFramesContext*)ref->data;
231 frames = av_mallocz_array(ctx->initial_pool_size, sizeof(*frames));
233 return AVERROR(ENOMEM);
235 for (i = 0; i < ctx->initial_pool_size; i++) {
236 frames[i] = av_frame_alloc();
240 ret = av_hwframe_get_buffer(ref, frames[i], 0);
246 for (i = 0; i < ctx->initial_pool_size; i++)
247 av_frame_free(&frames[i]);
253 int av_hwframe_ctx_init(AVBufferRef *ref)
255 AVHWFramesContext *ctx = (AVHWFramesContext*)ref->data;
256 const enum AVPixelFormat *pix_fmt;
259 /* validate the pixel format */
260 for (pix_fmt = ctx->internal->hw_type->pix_fmts; *pix_fmt != AV_PIX_FMT_NONE; pix_fmt++) {
261 if (*pix_fmt == ctx->format)
264 if (*pix_fmt == AV_PIX_FMT_NONE) {
265 av_log(ctx, AV_LOG_ERROR,
266 "The hardware pixel format '%s' is not supported by the device type '%s'\n",
267 av_get_pix_fmt_name(ctx->format), ctx->internal->hw_type->name);
268 return AVERROR(ENOSYS);
271 /* validate the dimensions */
272 ret = av_image_check_size(ctx->width, ctx->height, 0, ctx);
276 /* format-specific init */
277 if (ctx->internal->hw_type->frames_init) {
278 ret = ctx->internal->hw_type->frames_init(ctx);
283 if (ctx->internal->pool_internal && !ctx->pool)
284 ctx->pool = ctx->internal->pool_internal;
286 /* preallocate the frames in the pool, if requested */
287 if (ctx->initial_pool_size > 0) {
288 ret = hwframe_pool_prealloc(ref);
295 if (ctx->internal->hw_type->frames_uninit)
296 ctx->internal->hw_type->frames_uninit(ctx);
300 int av_hwframe_transfer_get_formats(AVBufferRef *hwframe_ref,
301 enum AVHWFrameTransferDirection dir,
302 enum AVPixelFormat **formats, int flags)
304 AVHWFramesContext *ctx = (AVHWFramesContext*)hwframe_ref->data;
306 if (!ctx->internal->hw_type->transfer_get_formats)
307 return AVERROR(ENOSYS);
309 return ctx->internal->hw_type->transfer_get_formats(ctx, dir, formats);
312 static int transfer_data_alloc(AVFrame *dst, const AVFrame *src, int flags)
317 frame_tmp = av_frame_alloc();
319 return AVERROR(ENOMEM);
321 /* if the format is set, use that
322 * otherwise pick the first supported one */
323 if (dst->format >= 0) {
324 frame_tmp->format = dst->format;
326 enum AVPixelFormat *formats;
328 ret = av_hwframe_transfer_get_formats(src->hw_frames_ctx,
329 AV_HWFRAME_TRANSFER_DIRECTION_FROM,
333 frame_tmp->format = formats[0];
336 frame_tmp->width = src->width;
337 frame_tmp->height = src->height;
339 ret = av_frame_get_buffer(frame_tmp, 32);
343 ret = av_hwframe_transfer_data(frame_tmp, src, flags);
347 av_frame_move_ref(dst, frame_tmp);
350 av_frame_free(&frame_tmp);
354 int av_hwframe_transfer_data(AVFrame *dst, const AVFrame *src, int flags)
356 AVHWFramesContext *ctx;
360 return transfer_data_alloc(dst, src, flags);
362 if (src->hw_frames_ctx) {
363 ctx = (AVHWFramesContext*)src->hw_frames_ctx->data;
365 ret = ctx->internal->hw_type->transfer_data_from(ctx, dst, src);
368 } else if (dst->hw_frames_ctx) {
369 ctx = (AVHWFramesContext*)dst->hw_frames_ctx->data;
371 ret = ctx->internal->hw_type->transfer_data_to(ctx, dst, src);
375 return AVERROR(ENOSYS);
380 int av_hwframe_get_buffer(AVBufferRef *hwframe_ref, AVFrame *frame, int flags)
382 AVHWFramesContext *ctx = (AVHWFramesContext*)hwframe_ref->data;
385 if (!ctx->internal->hw_type->frames_get_buffer)
386 return AVERROR(ENOSYS);
389 return AVERROR(EINVAL);
391 frame->hw_frames_ctx = av_buffer_ref(hwframe_ref);
392 if (!frame->hw_frames_ctx)
393 return AVERROR(ENOMEM);
395 ret = ctx->internal->hw_type->frames_get_buffer(ctx, frame);
397 av_buffer_unref(&frame->hw_frames_ctx);