mirror of https://github.com/FFmpeg/FFmpeg.git
Anton Khirnov
9 years ago
parent
7bc780cd44
commit
ad884d1002
7 changed files with 325 additions and 0 deletions
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/*
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* This file is part of Libav. |
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* |
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* Libav 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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* Libav 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 Libav; 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 "buffer.h" |
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#include "common.h" |
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#include "hwcontext.h" |
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#include "hwcontext_internal.h" |
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#include "hwcontext_cuda.h" |
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#include "mem.h" |
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#include "pixdesc.h" |
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#include "pixfmt.h" |
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typedef struct CUDAFramesContext { |
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int shift_width, shift_height; |
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} CUDAFramesContext; |
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static const enum AVPixelFormat supported_formats[] = { |
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AV_PIX_FMT_NV12, |
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AV_PIX_FMT_YUV420P, |
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AV_PIX_FMT_YUV444P, |
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}; |
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static void cuda_buffer_free(void *opaque, uint8_t *data) |
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{ |
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AVHWFramesContext *ctx = opaque; |
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AVCUDADeviceContext *hwctx = ctx->device_ctx->hwctx; |
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CUcontext dummy; |
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cuCtxPushCurrent(hwctx->cuda_ctx); |
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cuMemFree((CUdeviceptr)data); |
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cuCtxPopCurrent(&dummy); |
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} |
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static AVBufferRef *cuda_pool_alloc(void *opaque, int size) |
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{ |
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AVHWFramesContext *ctx = opaque; |
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AVCUDADeviceContext *hwctx = ctx->device_ctx->hwctx; |
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AVBufferRef *ret = NULL; |
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CUcontext dummy = NULL; |
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CUdeviceptr data; |
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CUresult err; |
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err = cuCtxPushCurrent(hwctx->cuda_ctx); |
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if (err != CUDA_SUCCESS) { |
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av_log(ctx, AV_LOG_ERROR, "Error setting current CUDA context\n"); |
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return NULL; |
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} |
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err = cuMemAlloc(&data, size); |
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if (err != CUDA_SUCCESS) |
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goto fail; |
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ret = av_buffer_create((uint8_t*)data, size, cuda_buffer_free, ctx, 0); |
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if (!ret) { |
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cuMemFree(data); |
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goto fail; |
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} |
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fail: |
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cuCtxPopCurrent(&dummy); |
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return ret; |
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} |
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static int cuda_frames_init(AVHWFramesContext *ctx) |
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{ |
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CUDAFramesContext *priv = ctx->internal->priv; |
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int i; |
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for (i = 0; i < FF_ARRAY_ELEMS(supported_formats); i++) { |
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if (ctx->sw_format == supported_formats[i]) |
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break; |
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} |
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if (i == FF_ARRAY_ELEMS(supported_formats)) { |
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av_log(ctx, AV_LOG_ERROR, "Pixel format '%s' is not supported\n", |
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av_get_pix_fmt_name(ctx->sw_format)); |
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return AVERROR(ENOSYS); |
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} |
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av_pix_fmt_get_chroma_sub_sample(ctx->sw_format, &priv->shift_width, &priv->shift_height); |
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if (!ctx->pool) { |
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int size; |
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switch (ctx->sw_format) { |
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case AV_PIX_FMT_NV12: |
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case AV_PIX_FMT_YUV420P: |
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size = ctx->width * ctx->height * 3 / 2; |
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break; |
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case AV_PIX_FMT_YUV444P: |
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size = ctx->width * ctx->height * 3; |
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break; |
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} |
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ctx->internal->pool_internal = av_buffer_pool_init2(size, ctx, cuda_pool_alloc, NULL); |
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if (!ctx->internal->pool_internal) |
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return AVERROR(ENOMEM); |
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} |
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return 0; |
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} |
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static int cuda_get_buffer(AVHWFramesContext *ctx, AVFrame *frame) |
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{ |
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frame->buf[0] = av_buffer_pool_get(ctx->pool); |
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if (!frame->buf[0]) |
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return AVERROR(ENOMEM); |
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switch (ctx->sw_format) { |
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case AV_PIX_FMT_NV12: |
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frame->data[0] = frame->buf[0]->data; |
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frame->data[1] = frame->data[0] + ctx->width * ctx->height; |
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frame->linesize[0] = ctx->width; |
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frame->linesize[1] = ctx->width; |
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break; |
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case AV_PIX_FMT_YUV420P: |
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frame->data[0] = frame->buf[0]->data; |
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frame->data[2] = frame->data[0] + ctx->width * ctx->height; |
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frame->data[1] = frame->data[2] + ctx->width * ctx->height / 4; |
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frame->linesize[0] = ctx->width; |
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frame->linesize[1] = ctx->width / 2; |
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frame->linesize[2] = ctx->width / 2; |
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break; |
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case AV_PIX_FMT_YUV444P: |
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frame->data[0] = frame->buf[0]->data; |
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frame->data[1] = frame->data[0] + ctx->width * ctx->height; |
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frame->data[2] = frame->data[1] + ctx->width * ctx->height; |
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frame->linesize[0] = ctx->width; |
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frame->linesize[1] = ctx->width; |
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frame->linesize[2] = ctx->width; |
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break; |
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default: |
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av_frame_unref(frame); |
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return AVERROR_BUG; |
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} |
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frame->format = AV_PIX_FMT_CUDA; |
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frame->width = ctx->width; |
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frame->height = ctx->height; |
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return 0; |
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} |
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static int cuda_transfer_get_formats(AVHWFramesContext *ctx, |
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enum AVHWFrameTransferDirection dir, |
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enum AVPixelFormat **formats) |
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{ |
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enum AVPixelFormat *fmts; |
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fmts = av_malloc_array(2, sizeof(*fmts)); |
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if (!fmts) |
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return AVERROR(ENOMEM); |
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fmts[0] = ctx->sw_format; |
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fmts[1] = AV_PIX_FMT_NONE; |
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*formats = fmts; |
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return 0; |
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} |
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static int cuda_transfer_data_from(AVHWFramesContext *ctx, AVFrame *dst, |
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const AVFrame *src) |
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{ |
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CUDAFramesContext *priv = ctx->internal->priv; |
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AVCUDADeviceContext *device_hwctx = ctx->device_ctx->hwctx; |
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CUcontext dummy; |
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CUresult err; |
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int i; |
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err = cuCtxPushCurrent(device_hwctx->cuda_ctx); |
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if (err != CUDA_SUCCESS) |
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return AVERROR_UNKNOWN; |
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for (i = 0; i < FF_ARRAY_ELEMS(src->data) && src->data[i]; i++) { |
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CUDA_MEMCPY2D cpy = { |
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.srcMemoryType = CU_MEMORYTYPE_DEVICE, |
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.dstMemoryType = CU_MEMORYTYPE_HOST, |
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.srcDevice = (CUdeviceptr)src->data[i], |
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.dstHost = dst->data[i], |
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.srcPitch = src->linesize[i], |
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.dstPitch = dst->linesize[i], |
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.WidthInBytes = FFMIN(src->linesize[i], dst->linesize[i]), |
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.Height = src->height >> (i ? priv->shift_height : 0), |
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}; |
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err = cuMemcpy2D(&cpy); |
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if (err != CUDA_SUCCESS) { |
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av_log(ctx, AV_LOG_ERROR, "Error transferring the data from the CUDA frame\n"); |
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return AVERROR_UNKNOWN; |
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} |
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} |
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cuCtxPopCurrent(&dummy); |
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return 0; |
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} |
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static int cuda_transfer_data_to(AVHWFramesContext *ctx, AVFrame *dst, |
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const AVFrame *src) |
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{ |
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CUDAFramesContext *priv = ctx->internal->priv; |
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AVCUDADeviceContext *device_hwctx = ctx->device_ctx->hwctx; |
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CUcontext dummy; |
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CUresult err; |
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int i; |
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err = cuCtxPushCurrent(device_hwctx->cuda_ctx); |
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if (err != CUDA_SUCCESS) |
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return AVERROR_UNKNOWN; |
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for (i = 0; i < FF_ARRAY_ELEMS(src->data) && src->data[i]; i++) { |
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CUDA_MEMCPY2D cpy = { |
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.srcMemoryType = CU_MEMORYTYPE_HOST, |
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.dstMemoryType = CU_MEMORYTYPE_DEVICE, |
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.srcHost = src->data[i], |
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.dstDevice = (CUdeviceptr)dst->data[i], |
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.srcPitch = src->linesize[i], |
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.dstPitch = dst->linesize[i], |
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.WidthInBytes = FFMIN(src->linesize[i], dst->linesize[i]), |
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.Height = src->height >> (i ? priv->shift_height : 0), |
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}; |
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err = cuMemcpy2D(&cpy); |
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if (err != CUDA_SUCCESS) { |
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av_log(ctx, AV_LOG_ERROR, "Error transferring the data from the CUDA frame\n"); |
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return AVERROR_UNKNOWN; |
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} |
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} |
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cuCtxPopCurrent(&dummy); |
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return 0; |
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} |
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const HWContextType ff_hwcontext_type_cuda = { |
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.type = AV_HWDEVICE_TYPE_CUDA, |
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.name = "CUDA", |
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.device_hwctx_size = sizeof(AVCUDADeviceContext), |
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.frames_priv_size = sizeof(CUDAFramesContext), |
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.frames_init = cuda_frames_init, |
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.frames_get_buffer = cuda_get_buffer, |
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.transfer_get_formats = cuda_transfer_get_formats, |
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.transfer_data_to = cuda_transfer_data_to, |
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.transfer_data_from = cuda_transfer_data_from, |
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.pix_fmts = (const enum AVPixelFormat[]){ AV_PIX_FMT_CUDA, AV_PIX_FMT_NONE }, |
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}; |
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@ -0,0 +1,46 @@ |
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/*
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* This file is part of Libav. |
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* |
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* Libav 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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* Libav 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 Libav; 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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#ifndef AVUTIL_HWCONTEXT_CUDA_H |
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#define AVUTIL_HWCONTEXT_CUDA_H |
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#include <cuda.h> |
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#include "pixfmt.h" |
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/**
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* @file |
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* An API-specific header for AV_HWDEVICE_TYPE_CUDA. |
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* |
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* This API supports dynamic frame pools. AVHWFramesContext.pool must return |
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* AVBufferRefs whose data pointer is a CUdeviceptr. |
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*/ |
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/**
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* This struct is allocated as AVHWDeviceContext.hwctx |
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*/ |
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typedef struct AVCUDADeviceContext { |
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CUcontext cuda_ctx; |
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} AVCUDADeviceContext; |
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/**
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* AVHWFramesContext.hwctx is currently not used |
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*/ |
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#endif /* AVUTIL_HWCONTEXT_CUDA_H */ |
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