mirror of https://git.ffmpeg.org/ffmpeg.git
233 lines
6.1 KiB
C
233 lines
6.1 KiB
C
/*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "libavutil/buffer.h"
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#include "libavutil/hwcontext.h"
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#include "libavutil/hwcontext_cuda.h"
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#include "libavutil/log.h"
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#include "libavutil/opt.h"
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#include "avfilter.h"
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#include "formats.h"
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#include "internal.h"
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#include "video.h"
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typedef struct CudaUploadContext {
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const AVClass *class;
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int device_idx;
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AVBufferRef *hwdevice;
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AVBufferRef *hwframe;
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} CudaUploadContext;
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static void cudaupload_ctx_free(AVHWDeviceContext *ctx)
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{
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AVCUDADeviceContext *hwctx = ctx->hwctx;
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cuCtxDestroy(hwctx->cuda_ctx);
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}
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static av_cold int cudaupload_init(AVFilterContext *ctx)
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{
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CudaUploadContext *s = ctx->priv;
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AVHWDeviceContext *device_ctx;
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AVCUDADeviceContext *device_hwctx;
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CUdevice device;
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CUcontext cuda_ctx = NULL, dummy;
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CUresult err;
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int ret;
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err = cuInit(0);
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if (err != CUDA_SUCCESS) {
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av_log(ctx, AV_LOG_ERROR, "Could not initialize the CUDA driver API\n");
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return AVERROR_UNKNOWN;
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}
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err = cuDeviceGet(&device, s->device_idx);
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if (err != CUDA_SUCCESS) {
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av_log(ctx, AV_LOG_ERROR, "Could not get the device number %d\n", s->device_idx);
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return AVERROR_UNKNOWN;
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}
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err = cuCtxCreate(&cuda_ctx, 0, device);
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if (err != CUDA_SUCCESS) {
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av_log(ctx, AV_LOG_ERROR, "Error creating a CUDA context\n");
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return AVERROR_UNKNOWN;
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}
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cuCtxPopCurrent(&dummy);
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s->hwdevice = av_hwdevice_ctx_alloc(AV_HWDEVICE_TYPE_CUDA);
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if (!s->hwdevice) {
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cuCtxDestroy(cuda_ctx);
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return AVERROR(ENOMEM);
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}
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device_ctx = (AVHWDeviceContext*)s->hwdevice->data;
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device_ctx->free = cudaupload_ctx_free;
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device_hwctx = device_ctx->hwctx;
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device_hwctx->cuda_ctx = cuda_ctx;
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ret = av_hwdevice_ctx_init(s->hwdevice);
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if (ret < 0)
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return ret;
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return 0;
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}
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static av_cold void cudaupload_uninit(AVFilterContext *ctx)
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{
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CudaUploadContext *s = ctx->priv;
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av_buffer_unref(&s->hwframe);
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av_buffer_unref(&s->hwdevice);
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}
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static int cudaupload_query_formats(AVFilterContext *ctx)
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{
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static const enum AVPixelFormat input_pix_fmts[] = {
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AV_PIX_FMT_NV12, AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV444P,
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AV_PIX_FMT_NONE,
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};
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static const enum AVPixelFormat output_pix_fmts[] = {
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AV_PIX_FMT_CUDA, AV_PIX_FMT_NONE,
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};
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AVFilterFormats *in_fmts = ff_make_format_list(input_pix_fmts);
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AVFilterFormats *out_fmts = ff_make_format_list(output_pix_fmts);
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ff_formats_ref(in_fmts, &ctx->inputs[0]->out_formats);
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ff_formats_ref(out_fmts, &ctx->outputs[0]->in_formats);
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return 0;
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}
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static int cudaupload_config_output(AVFilterLink *outlink)
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{
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AVFilterContext *ctx = outlink->src;
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AVFilterLink *inlink = ctx->inputs[0];
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CudaUploadContext *s = ctx->priv;
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AVHWFramesContext *hwframe_ctx;
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int ret;
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av_buffer_unref(&s->hwframe);
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s->hwframe = av_hwframe_ctx_alloc(s->hwdevice);
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if (!s->hwframe)
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return AVERROR(ENOMEM);
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hwframe_ctx = (AVHWFramesContext*)s->hwframe->data;
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hwframe_ctx->format = AV_PIX_FMT_CUDA;
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hwframe_ctx->sw_format = inlink->format;
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hwframe_ctx->width = FFALIGN(inlink->w, 16);
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hwframe_ctx->height = FFALIGN(inlink->h, 16);
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ret = av_hwframe_ctx_init(s->hwframe);
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if (ret < 0)
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return ret;
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outlink->hw_frames_ctx = av_buffer_ref(s->hwframe);
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if (!outlink->hw_frames_ctx)
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return AVERROR(ENOMEM);
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return 0;
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}
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static int cudaupload_filter_frame(AVFilterLink *link, AVFrame *in)
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{
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AVFilterContext *ctx = link->dst;
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CudaUploadContext *s = ctx->priv;
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AVFrame *out = NULL;
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int ret;
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out = av_frame_alloc();
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if (!out) {
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ret = AVERROR(ENOMEM);
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goto fail;
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}
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ret = av_hwframe_get_buffer(s->hwframe, out, 0);
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if (ret < 0)
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goto fail;
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out->width = in->width;
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out->height = in->height;
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ret = av_hwframe_transfer_data(out, in, 0);
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if (ret < 0) {
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av_log(ctx, AV_LOG_ERROR, "Error transferring data to the GPU\n");
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goto fail;
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}
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ret = av_frame_copy_props(out, in);
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if (ret < 0)
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goto fail;
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av_frame_free(&in);
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return ff_filter_frame(ctx->outputs[0], out);
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fail:
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av_frame_free(&in);
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av_frame_free(&out);
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return ret;
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}
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#define OFFSET(x) offsetof(CudaUploadContext, x)
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#define FLAGS (AV_OPT_FLAG_FILTERING_PARAM | AV_OPT_FLAG_VIDEO_PARAM)
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static const AVOption cudaupload_options[] = {
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{ "device", "Number of the device to use", OFFSET(device_idx), AV_OPT_TYPE_INT, { .i64 = 0 }, .flags = FLAGS },
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{ NULL },
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};
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AVFILTER_DEFINE_CLASS(cudaupload);
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static const AVFilterPad cudaupload_inputs[] = {
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{
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.name = "default",
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.type = AVMEDIA_TYPE_VIDEO,
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.filter_frame = cudaupload_filter_frame,
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},
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{ NULL }
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};
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static const AVFilterPad cudaupload_outputs[] = {
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{
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.name = "default",
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.type = AVMEDIA_TYPE_VIDEO,
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.config_props = cudaupload_config_output,
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},
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{ NULL }
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};
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AVFilter ff_vf_hwupload_cuda = {
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.name = "hwupload_cuda",
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.description = NULL_IF_CONFIG_SMALL("Upload a system memory frame to a CUDA device."),
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.init = cudaupload_init,
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.uninit = cudaupload_uninit,
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.query_formats = cudaupload_query_formats,
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.priv_size = sizeof(CudaUploadContext),
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.priv_class = &cudaupload_class,
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.inputs = cudaupload_inputs,
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.outputs = cudaupload_outputs,
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};
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