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
21 #include "libavutil/avassert.h"
22 #include "libavutil/frame.h"
23 #include "libavutil/hwcontext.h"
24 #include "libavutil/log.h"
29 int hwaccel_lax_profile_check = 0;
30 AVBufferRef *hw_device_ctx;
33 static AVClass vaapi_class = {
34 .class_name = "vaapi",
35 .item_name = av_default_item_name,
36 .version = LIBAVUTIL_VERSION_INT,
39 #define DEFAULT_SURFACES 20
41 typedef struct VAAPIDecoderContext {
44 AVBufferRef *device_ref;
45 AVHWDeviceContext *device;
46 AVBufferRef *frames_ref;
47 AVHWFramesContext *frames;
49 // The output need not have the same format, width and height as the
50 // decoded frames - the copy for non-direct-mapped access is actually
51 // a whole vpp instance which can do arbitrary scaling and format
53 enum AVPixelFormat output_format;
54 } VAAPIDecoderContext;
57 static int vaapi_get_buffer(AVCodecContext *avctx, AVFrame *frame, int flags)
59 InputStream *ist = avctx->opaque;
60 VAAPIDecoderContext *ctx = ist->hwaccel_ctx;
63 err = av_hwframe_get_buffer(ctx->frames_ref, frame, 0);
65 av_log(ctx, AV_LOG_ERROR, "Failed to allocate decoder surface.\n");
67 av_log(ctx, AV_LOG_DEBUG, "Decoder given surface %#x.\n",
68 (unsigned int)(uintptr_t)frame->data[3]);
73 static int vaapi_retrieve_data(AVCodecContext *avctx, AVFrame *input)
75 InputStream *ist = avctx->opaque;
76 VAAPIDecoderContext *ctx = ist->hwaccel_ctx;
80 av_assert0(input->format == AV_PIX_FMT_VAAPI);
82 if (ctx->output_format == AV_PIX_FMT_VAAPI) {
87 av_log(ctx, AV_LOG_DEBUG, "Retrieve data from surface %#x.\n",
88 (unsigned int)(uintptr_t)input->data[3]);
90 output = av_frame_alloc();
92 return AVERROR(ENOMEM);
94 output->format = ctx->output_format;
96 err = av_hwframe_transfer_data(output, input, 0);
98 av_log(ctx, AV_LOG_ERROR, "Failed to transfer data to "
99 "output frame: %d.\n", err);
103 err = av_frame_copy_props(output, input);
105 av_frame_unref(output);
109 av_frame_unref(input);
110 av_frame_move_ref(input, output);
111 av_frame_free(&output);
117 av_frame_free(&output);
121 static void vaapi_decode_uninit(AVCodecContext *avctx)
123 InputStream *ist = avctx->opaque;
124 VAAPIDecoderContext *ctx = ist->hwaccel_ctx;
127 av_buffer_unref(&ctx->frames_ref);
128 av_buffer_unref(&ctx->device_ref);
132 av_buffer_unref(&ist->hw_frames_ctx);
134 ist->hwaccel_ctx = NULL;
135 ist->hwaccel_uninit = NULL;
136 ist->hwaccel_get_buffer = NULL;
137 ist->hwaccel_retrieve_data = NULL;
140 int vaapi_decode_init(AVCodecContext *avctx)
142 InputStream *ist = avctx->opaque;
143 VAAPIDecoderContext *ctx;
145 int loglevel = (ist->hwaccel_id != HWACCEL_VAAPI ? AV_LOG_VERBOSE
148 if (ist->hwaccel_ctx)
149 vaapi_decode_uninit(avctx);
151 // We have -hwaccel without -vaapi_device, so just initialise here with
152 // the device passed as -hwaccel_device (if -vaapi_device was passed, it
153 // will always have been called before now).
154 if (!hw_device_ctx) {
155 err = vaapi_device_init(ist->hwaccel_device);
160 ctx = av_mallocz(sizeof(*ctx));
162 return AVERROR(ENOMEM);
163 ctx->class = &vaapi_class;
164 ist->hwaccel_ctx = ctx;
166 ctx->device_ref = av_buffer_ref(hw_device_ctx);
167 ctx->device = (AVHWDeviceContext*)ctx->device_ref->data;
169 ctx->output_format = ist->hwaccel_output_format;
170 avctx->pix_fmt = ctx->output_format;
172 ctx->frames_ref = av_hwframe_ctx_alloc(ctx->device_ref);
173 if (!ctx->frames_ref) {
174 av_log(ctx, loglevel, "Failed to create VAAPI frame context.\n");
175 err = AVERROR(ENOMEM);
179 ctx->frames = (AVHWFramesContext*)ctx->frames_ref->data;
181 ctx->frames->format = AV_PIX_FMT_VAAPI;
182 ctx->frames->width = avctx->coded_width;
183 ctx->frames->height = avctx->coded_height;
185 // It would be nice if we could query the available formats here,
186 // but unfortunately we don't have a VAConfigID to do it with.
187 // For now, just assume an NV12 format (or P010 if 10-bit).
188 ctx->frames->sw_format = (avctx->sw_pix_fmt == AV_PIX_FMT_YUV420P10 ?
189 AV_PIX_FMT_P010 : AV_PIX_FMT_NV12);
191 // For frame-threaded decoding, at least one additional surface
192 // is needed for each thread.
193 ctx->frames->initial_pool_size = DEFAULT_SURFACES;
194 if (avctx->active_thread_type & FF_THREAD_FRAME)
195 ctx->frames->initial_pool_size += avctx->thread_count;
197 err = av_hwframe_ctx_init(ctx->frames_ref);
199 av_log(ctx, loglevel, "Failed to initialise VAAPI frame "
200 "context: %d\n", err);
204 ist->hw_frames_ctx = av_buffer_ref(ctx->frames_ref);
205 if (!ist->hw_frames_ctx) {
206 err = AVERROR(ENOMEM);
210 ist->hwaccel_uninit = &vaapi_decode_uninit;
211 ist->hwaccel_get_buffer = &vaapi_get_buffer;
212 ist->hwaccel_retrieve_data = &vaapi_retrieve_data;
217 vaapi_decode_uninit(avctx);
221 static AVClass *vaapi_log = &vaapi_class;
223 av_cold int vaapi_device_init(const char *device)
227 av_buffer_unref(&hw_device_ctx);
229 err = av_hwdevice_ctx_create(&hw_device_ctx, AV_HWDEVICE_TYPE_VAAPI,
232 av_log(&vaapi_log, AV_LOG_ERROR, "Failed to create a VAAPI device\n");