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
19 #include "libavutil/hwcontext.h"
20 #include "libavutil/pixdesc.h"
24 static void cuvid_uninit(AVCodecContext *avctx)
26 InputStream *ist = avctx->opaque;
27 av_buffer_unref(&ist->hw_frames_ctx);
30 int cuvid_init(AVCodecContext *avctx)
32 InputStream *ist = avctx->opaque;
33 AVHWFramesContext *frames_ctx;
36 av_log(avctx, AV_LOG_VERBOSE, "Initializing cuvid hwaccel\n");
39 ret = av_hwdevice_ctx_create(&hw_device_ctx, AV_HWDEVICE_TYPE_CUDA,
40 ist->hwaccel_device, NULL, 0);
42 av_log(avctx, AV_LOG_ERROR, "Error creating a CUDA device\n");
47 av_buffer_unref(&ist->hw_frames_ctx);
48 ist->hw_frames_ctx = av_hwframe_ctx_alloc(hw_device_ctx);
49 if (!ist->hw_frames_ctx) {
50 av_log(avctx, AV_LOG_ERROR, "Error creating a CUDA frames context\n");
51 return AVERROR(ENOMEM);
54 frames_ctx = (AVHWFramesContext*)ist->hw_frames_ctx->data;
56 frames_ctx->format = AV_PIX_FMT_CUDA;
57 frames_ctx->sw_format = avctx->sw_pix_fmt;
58 frames_ctx->width = avctx->width;
59 frames_ctx->height = avctx->height;
61 av_log(avctx, AV_LOG_DEBUG, "Initializing CUDA frames context: sw_format = %s, width = %d, height = %d\n",
62 av_get_pix_fmt_name(frames_ctx->sw_format), frames_ctx->width, frames_ctx->height);
64 ret = av_hwframe_ctx_init(ist->hw_frames_ctx);
66 av_log(avctx, AV_LOG_ERROR, "Error initializing a CUDA frame pool\n");
70 ist->hwaccel_uninit = cuvid_uninit;