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[] = {
35 static const AVClass hwdevice_ctx_class = {
36 .class_name = "AVHWDeviceContext",
37 .item_name = av_default_item_name,
38 .version = LIBAVUTIL_VERSION_INT,
41 static void hwdevice_ctx_free(void *opaque, uint8_t *data)
43 AVHWDeviceContext *ctx = (AVHWDeviceContext*)data;
45 /* uninit might still want access the hw context and the user
46 * free() callback might destroy it, so uninit has to be called first */
47 if (ctx->internal->hw_type->device_uninit)
48 ctx->internal->hw_type->device_uninit(ctx);
53 av_freep(&ctx->hwctx);
54 av_freep(&ctx->internal->priv);
55 av_freep(&ctx->internal);
59 AVBufferRef *av_hwdevice_ctx_alloc(enum AVHWDeviceType type)
61 AVHWDeviceContext *ctx;
63 const HWContextType *hw_type = NULL;
66 for (i = 0; hw_table[i]; i++) {
67 if (hw_table[i]->type == type) {
68 hw_type = hw_table[i];
75 ctx = av_mallocz(sizeof(*ctx));
79 ctx->internal = av_mallocz(sizeof(*ctx->internal));
83 if (hw_type->device_priv_size) {
84 ctx->internal->priv = av_mallocz(hw_type->device_priv_size);
85 if (!ctx->internal->priv)
89 if (hw_type->device_hwctx_size) {
90 ctx->hwctx = av_mallocz(hw_type->device_hwctx_size);
95 buf = av_buffer_create((uint8_t*)ctx, sizeof(*ctx),
96 hwdevice_ctx_free, NULL,
97 AV_BUFFER_FLAG_READONLY);
102 ctx->av_class = &hwdevice_ctx_class;
104 ctx->internal->hw_type = hw_type;
110 av_freep(&ctx->internal->priv);
111 av_freep(&ctx->internal);
112 av_freep(&ctx->hwctx);
117 int av_hwdevice_ctx_init(AVBufferRef *ref)
119 AVHWDeviceContext *ctx = (AVHWDeviceContext*)ref->data;
122 if (ctx->internal->hw_type->device_init) {
123 ret = ctx->internal->hw_type->device_init(ctx);
130 if (ctx->internal->hw_type->device_uninit)
131 ctx->internal->hw_type->device_uninit(ctx);
135 static const AVClass hwframe_ctx_class = {
136 .class_name = "AVHWFramesContext",
137 .item_name = av_default_item_name,
138 .version = LIBAVUTIL_VERSION_INT,
141 static void hwframe_ctx_free(void *opaque, uint8_t *data)
143 AVHWFramesContext *ctx = (AVHWFramesContext*)data;
145 if (ctx->internal->pool_internal)
146 av_buffer_pool_uninit(&ctx->internal->pool_internal);
148 if (ctx->internal->hw_type->frames_uninit)
149 ctx->internal->hw_type->frames_uninit(ctx);
154 av_buffer_unref(&ctx->device_ref);
156 av_freep(&ctx->hwctx);
157 av_freep(&ctx->internal->priv);
158 av_freep(&ctx->internal);
162 AVBufferRef *av_hwframe_ctx_alloc(AVBufferRef *device_ref_in)
164 AVHWDeviceContext *device_ctx = (AVHWDeviceContext*)device_ref_in->data;
165 const HWContextType *hw_type = device_ctx->internal->hw_type;
166 AVHWFramesContext *ctx;
167 AVBufferRef *buf, *device_ref = NULL;;
169 ctx = av_mallocz(sizeof(*ctx));
173 ctx->internal = av_mallocz(sizeof(*ctx->internal));
177 if (hw_type->frames_priv_size) {
178 ctx->internal->priv = av_mallocz(hw_type->frames_priv_size);
179 if (!ctx->internal->priv)
183 if (hw_type->frames_hwctx_size) {
184 ctx->hwctx = av_mallocz(hw_type->frames_hwctx_size);
189 device_ref = av_buffer_ref(device_ref_in);
193 buf = av_buffer_create((uint8_t*)ctx, sizeof(*ctx),
194 hwframe_ctx_free, NULL,
195 AV_BUFFER_FLAG_READONLY);
199 ctx->av_class = &hwframe_ctx_class;
200 ctx->device_ref = device_ref;
201 ctx->device_ctx = device_ctx;
202 ctx->format = AV_PIX_FMT_NONE;
204 ctx->internal->hw_type = hw_type;
210 av_buffer_unref(&device_ref);
212 av_freep(&ctx->internal->priv);
213 av_freep(&ctx->internal);
214 av_freep(&ctx->hwctx);
219 static int hwframe_pool_prealloc(AVBufferRef *ref)
221 AVHWFramesContext *ctx = (AVHWFramesContext*)ref->data;
225 frames = av_mallocz_array(ctx->initial_pool_size, sizeof(*frames));
227 return AVERROR(ENOMEM);
229 for (i = 0; i < ctx->initial_pool_size; i++) {
230 frames[i] = av_frame_alloc();
234 ret = av_hwframe_get_buffer(ref, frames[i], 0);
240 for (i = 0; i < ctx->initial_pool_size; i++)
241 av_frame_free(&frames[i]);
247 int av_hwframe_ctx_init(AVBufferRef *ref)
249 AVHWFramesContext *ctx = (AVHWFramesContext*)ref->data;
250 const enum AVPixelFormat *pix_fmt;
253 /* validate the pixel format */
254 for (pix_fmt = ctx->internal->hw_type->pix_fmts; *pix_fmt != AV_PIX_FMT_NONE; pix_fmt++) {
255 if (*pix_fmt == ctx->format)
258 if (*pix_fmt == AV_PIX_FMT_NONE) {
259 av_log(ctx, AV_LOG_ERROR,
260 "The hardware pixel format '%s' is not supported by the device type '%s'\n",
261 av_get_pix_fmt_name(ctx->format), ctx->internal->hw_type->name);
262 return AVERROR(ENOSYS);
265 /* validate the dimensions */
266 ret = av_image_check_size(ctx->width, ctx->height, 0, ctx);
270 /* format-specific init */
271 if (ctx->internal->hw_type->frames_init) {
272 ret = ctx->internal->hw_type->frames_init(ctx);
277 if (ctx->internal->pool_internal && !ctx->pool)
278 ctx->pool = ctx->internal->pool_internal;
280 /* preallocate the frames in the pool, if requested */
281 if (ctx->initial_pool_size > 0) {
282 ret = hwframe_pool_prealloc(ref);
289 if (ctx->internal->hw_type->frames_uninit)
290 ctx->internal->hw_type->frames_uninit(ctx);
294 int av_hwframe_transfer_get_formats(AVBufferRef *hwframe_ref,
295 enum AVHWFrameTransferDirection dir,
296 enum AVPixelFormat **formats, int flags)
298 AVHWFramesContext *ctx = (AVHWFramesContext*)hwframe_ref->data;
300 if (!ctx->internal->hw_type->transfer_get_formats)
301 return AVERROR(ENOSYS);
303 return ctx->internal->hw_type->transfer_get_formats(ctx, dir, formats);
306 static int transfer_data_alloc(AVFrame *dst, const AVFrame *src, int flags)
311 frame_tmp = av_frame_alloc();
313 return AVERROR(ENOMEM);
315 /* if the format is set, use that
316 * otherwise pick the first supported one */
317 if (dst->format >= 0) {
318 frame_tmp->format = dst->format;
320 enum AVPixelFormat *formats;
322 ret = av_hwframe_transfer_get_formats(src->hw_frames_ctx,
323 AV_HWFRAME_TRANSFER_DIRECTION_FROM,
327 frame_tmp->format = formats[0];
330 frame_tmp->width = src->width;
331 frame_tmp->height = src->height;
333 ret = av_frame_get_buffer(frame_tmp, 32);
337 ret = av_hwframe_transfer_data(frame_tmp, src, flags);
341 av_frame_move_ref(dst, frame_tmp);
344 av_frame_free(&frame_tmp);
348 int av_hwframe_transfer_data(AVFrame *dst, const AVFrame *src, int flags)
350 AVHWFramesContext *ctx;
354 return transfer_data_alloc(dst, src, flags);
356 if (src->hw_frames_ctx) {
357 ctx = (AVHWFramesContext*)src->hw_frames_ctx->data;
359 ret = ctx->internal->hw_type->transfer_data_from(ctx, dst, src);
362 } else if (dst->hw_frames_ctx) {
363 ctx = (AVHWFramesContext*)dst->hw_frames_ctx->data;
365 ret = ctx->internal->hw_type->transfer_data_to(ctx, dst, src);
369 return AVERROR(ENOSYS);
374 int av_hwframe_get_buffer(AVBufferRef *hwframe_ref, AVFrame *frame, int flags)
376 AVHWFramesContext *ctx = (AVHWFramesContext*)hwframe_ref->data;
379 if (!ctx->internal->hw_type->frames_get_buffer)
380 return AVERROR(ENOSYS);
383 return AVERROR(EINVAL);
385 frame->hw_frames_ctx = av_buffer_ref(hwframe_ref);
386 if (!frame->hw_frames_ctx)
387 return AVERROR(ENOMEM);
389 ret = ctx->internal->hw_type->frames_get_buffer(ctx, frame);
391 av_buffer_unref(&frame->hw_frames_ctx);