mpv/video/decode/cuda.c

127 lines
3.3 KiB
C

/*
* This file is part of mpv.
*
* Copyright (c) 2016 Philip Langdale <philipl@overt.org>
*
* mpv is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* mpv is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with mpv. If not, see <http://www.gnu.org/licenses/>.
*/
#include <libavutil/hwcontext.h>
#include <libavutil/hwcontext_cuda.h>
#include "common/av_common.h"
#include "video/decode/lavc.h"
typedef struct CUVIDContext {
CUcontext cuda_ctx;
} CUVIDContext;
static void cuvid_ctx_free(AVHWDeviceContext *ctx)
{
AVCUDADeviceContext *hwctx = ctx->hwctx;
cuCtxDestroy(hwctx->cuda_ctx);
}
static int probe(struct lavc_ctx *ctx, struct vd_lavc_hwdec *hwdec,
const char *codec)
{
if (!hwdec_devices_load(ctx->hwdec_devs, HWDEC_CUDA))
return HWDEC_ERR_NO_CTX;
return 0;
}
static int init(struct lavc_ctx *ctx)
{
struct CUVIDContext *p = talloc_ptrtype(NULL, p);
*p = (struct CUVIDContext) {
.cuda_ctx = hwdec_devices_get(ctx->hwdec_devs, HWDEC_CUDA)->ctx,
};
ctx->hwdec_priv = p;
return 0;
}
static int init_decoder(struct lavc_ctx *ctx, int w, int h)
{
AVCodecContext *avctx = ctx->avctx;
AVCUDADeviceContext *device_hwctx;
AVHWDeviceContext *device_ctx;
CUVIDContext *priv = ctx->hwdec_priv;
int ret = 0;
if (avctx->hw_frames_ctx) {
MP_ERR(ctx, "hw_frames_ctx already initialised!\n");
return -1;
}
AVBufferRef *hw_device_ctx = av_hwdevice_ctx_alloc(AV_HWDEVICE_TYPE_CUDA);
if (!hw_device_ctx) {
MP_WARN(ctx, "av_hwdevice_ctx_alloc(AV_HWDEVICE_TYPE_CUDA) failed\n");
goto error;
}
device_ctx = (AVHWDeviceContext*)hw_device_ctx->data;
device_ctx->free = cuvid_ctx_free;
device_hwctx = device_ctx->hwctx;
device_hwctx->cuda_ctx = priv->cuda_ctx;
ret = av_hwdevice_ctx_init(hw_device_ctx);
if (ret < 0) {
MP_ERR(ctx, "av_hwdevice_ctx_init failed\n");
goto error;
}
avctx->hw_frames_ctx = av_hwframe_ctx_alloc(hw_device_ctx);
if (!avctx->hw_frames_ctx) {
MP_ERR(ctx, "av_hwframe_ctx_alloc failed\n");
goto error;
}
return 0;
error:
av_buffer_unref(&avctx->hw_frames_ctx);
av_buffer_unref(&hw_device_ctx);
return -1;
}
static void uninit(struct lavc_ctx *ctx)
{
struct CUVIDContext *p = ctx->hwdec_priv;
if (!p)
return;
talloc_free(p);
ctx->hwdec_priv = NULL;
}
static struct mp_image *process_image(struct lavc_ctx *ctx, struct mp_image *img)
{
if (img->imgfmt == IMGFMT_CUDA)
img->params.hw_subfmt = IMGFMT_NV12;
return img;
}
const struct vd_lavc_hwdec mp_vd_lavc_cuda = {
.type = HWDEC_CUDA,
.image_format = IMGFMT_CUDA,
.lavc_suffix = "_cuvid",
.probe = probe,
.init = init,
.uninit = uninit,
.init_decoder = init_decoder,
.process_image = process_image,
};