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hwcontext: add a CUDA implementation

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This commit is contained in:
Anton Khirnov 2016-01-13 14:25:58 +01:00
parent 7bc780cd44
commit ad884d1002
7 changed files with 325 additions and 0 deletions
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2
doc/APIchanges
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@ -17,6 +17,8 @@ API changes, most recent first:
xxxxxxx buffer.h - Add av_buffer_pool_init2().
xxxxxxx hwcontext.h - Add a new installed header hwcontext.h with a new API
for handling hwaccel frames.
xxxxxxx hwcontext_cuda.h - Add a new installed header hwcontext_cuda.h with
CUDA-specific hwcontext definitions.
xxxxxxx hwcontext_vdpau.h - Add a new installed header hwcontext_vdpau.h with
VDPAU-specific hwcontext definitions.
xxxxxxx pixfmt.h - Add AV_PIX_FMT_CUDA.

2
libavutil/Makefile
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@ -24,6 +24,7 @@ HEADERS = adler32.h \
frame.h \
hmac.h \
hwcontext.h \
hwcontext_cuda.h \
hwcontext_vdpau.h \
imgutils.h \
intfloat.h \
@ -106,6 +107,7 @@ OBJS = adler32.o \
xtea.o \
OBJS-$(CONFIG_LZO) += lzo.o
OBJS-$(CONFIG_CUDA) += hwcontext_cuda.o
OBJS-$(CONFIG_VDPAU) += hwcontext_vdpau.o
OBJS += $(COMPAT_OBJS:%=../compat/%)

3
libavutil/hwcontext.c
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@ -29,6 +29,9 @@
#include "pixfmt.h"
static const HWContextType *hw_table[] = {
#if CONFIG_CUDA
&ff_hwcontext_type_cuda,
#endif
#if CONFIG_VDPAU
&ff_hwcontext_type_vdpau,
#endif

1
libavutil/hwcontext.h
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@ -26,6 +26,7 @@
enum AVHWDeviceType {
AV_HWDEVICE_TYPE_VDPAU,
AV_HWDEVICE_TYPE_CUDA,
};
typedef struct AVHWDeviceInternal AVHWDeviceInternal;

270
libavutil/hwcontext_cuda.c Normal file
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@ -0,0 +1,270 @@
/*
* This file is part of Libav.
*
* Libav 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.
*
* Libav 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 Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "buffer.h"
#include "common.h"
#include "hwcontext.h"
#include "hwcontext_internal.h"
#include "hwcontext_cuda.h"
#include "mem.h"
#include "pixdesc.h"
#include "pixfmt.h"
typedef struct CUDAFramesContext {
int shift_width, shift_height;
} CUDAFramesContext;
static const enum AVPixelFormat supported_formats[] = {
AV_PIX_FMT_NV12,
AV_PIX_FMT_YUV420P,
AV_PIX_FMT_YUV444P,
};
static void cuda_buffer_free(void *opaque, uint8_t *data)
{
AVHWFramesContext *ctx = opaque;
AVCUDADeviceContext *hwctx = ctx->device_ctx->hwctx;
CUcontext dummy;
cuCtxPushCurrent(hwctx->cuda_ctx);
cuMemFree((CUdeviceptr)data);
cuCtxPopCurrent(&dummy);
}
static AVBufferRef *cuda_pool_alloc(void *opaque, int size)
{
AVHWFramesContext *ctx = opaque;
AVCUDADeviceContext *hwctx = ctx->device_ctx->hwctx;
AVBufferRef *ret = NULL;
CUcontext dummy = NULL;
CUdeviceptr data;
CUresult err;
err = cuCtxPushCurrent(hwctx->cuda_ctx);
if (err != CUDA_SUCCESS) {
av_log(ctx, AV_LOG_ERROR, "Error setting current CUDA context\n");
return NULL;
}
err = cuMemAlloc(&data, size);
if (err != CUDA_SUCCESS)
goto fail;
ret = av_buffer_create((uint8_t*)data, size, cuda_buffer_free, ctx, 0);
if (!ret) {
cuMemFree(data);
goto fail;
}
fail:
cuCtxPopCurrent(&dummy);
return ret;
}
static int cuda_frames_init(AVHWFramesContext *ctx)
{
CUDAFramesContext *priv = ctx->internal->priv;
int i;
for (i = 0; i < FF_ARRAY_ELEMS(supported_formats); i++) {
if (ctx->sw_format == supported_formats[i])
break;
}
if (i == FF_ARRAY_ELEMS(supported_formats)) {
av_log(ctx, AV_LOG_ERROR, "Pixel format '%s' is not supported\n",
av_get_pix_fmt_name(ctx->sw_format));
return AVERROR(ENOSYS);
}
av_pix_fmt_get_chroma_sub_sample(ctx->sw_format, &priv->shift_width, &priv->shift_height);
if (!ctx->pool) {
int size;
switch (ctx->sw_format) {
case AV_PIX_FMT_NV12:
case AV_PIX_FMT_YUV420P:
size = ctx->width * ctx->height * 3 / 2;
break;
case AV_PIX_FMT_YUV444P:
size = ctx->width * ctx->height * 3;
break;
}
ctx->internal->pool_internal = av_buffer_pool_init2(size, ctx, cuda_pool_alloc, NULL);
if (!ctx->internal->pool_internal)
return AVERROR(ENOMEM);
}
return 0;
}
static int cuda_get_buffer(AVHWFramesContext *ctx, AVFrame *frame)
{
frame->buf[0] = av_buffer_pool_get(ctx->pool);
if (!frame->buf[0])
return AVERROR(ENOMEM);
switch (ctx->sw_format) {
case AV_PIX_FMT_NV12:
frame->data[0] = frame->buf[0]->data;
frame->data[1] = frame->data[0] + ctx->width * ctx->height;
frame->linesize[0] = ctx->width;
frame->linesize[1] = ctx->width;
break;
case AV_PIX_FMT_YUV420P:
frame->data[0] = frame->buf[0]->data;
frame->data[2] = frame->data[0] + ctx->width * ctx->height;
frame->data[1] = frame->data[2] + ctx->width * ctx->height / 4;
frame->linesize[0] = ctx->width;
frame->linesize[1] = ctx->width / 2;
frame->linesize[2] = ctx->width / 2;
break;
case AV_PIX_FMT_YUV444P:
frame->data[0] = frame->buf[0]->data;
frame->data[1] = frame->data[0] + ctx->width * ctx->height;
frame->data[2] = frame->data[1] + ctx->width * ctx->height;
frame->linesize[0] = ctx->width;
frame->linesize[1] = ctx->width;
frame->linesize[2] = ctx->width;
break;
default:
av_frame_unref(frame);
return AVERROR_BUG;
}
frame->format = AV_PIX_FMT_CUDA;
frame->width = ctx->width;
frame->height = ctx->height;
return 0;
}
static int cuda_transfer_get_formats(AVHWFramesContext *ctx,
enum AVHWFrameTransferDirection dir,
enum AVPixelFormat **formats)
{
enum AVPixelFormat *fmts;
fmts = av_malloc_array(2, sizeof(*fmts));
if (!fmts)
return AVERROR(ENOMEM);
fmts[0] = ctx->sw_format;
fmts[1] = AV_PIX_FMT_NONE;
*formats = fmts;
return 0;
}
static int cuda_transfer_data_from(AVHWFramesContext *ctx, AVFrame *dst,
const AVFrame *src)
{
CUDAFramesContext *priv = ctx->internal->priv;
AVCUDADeviceContext *device_hwctx = ctx->device_ctx->hwctx;
CUcontext dummy;
CUresult err;
int i;
err = cuCtxPushCurrent(device_hwctx->cuda_ctx);
if (err != CUDA_SUCCESS)
return AVERROR_UNKNOWN;
for (i = 0; i < FF_ARRAY_ELEMS(src->data) && src->data[i]; i++) {
CUDA_MEMCPY2D cpy = {
.srcMemoryType = CU_MEMORYTYPE_DEVICE,
.dstMemoryType = CU_MEMORYTYPE_HOST,
.srcDevice = (CUdeviceptr)src->data[i],
.dstHost = dst->data[i],
.srcPitch = src->linesize[i],
.dstPitch = dst->linesize[i],
.WidthInBytes = FFMIN(src->linesize[i], dst->linesize[i]),
.Height = src->height >> (i ? priv->shift_height : 0),
};
err = cuMemcpy2D(&cpy);
if (err != CUDA_SUCCESS) {
av_log(ctx, AV_LOG_ERROR, "Error transferring the data from the CUDA frame\n");
return AVERROR_UNKNOWN;
}
}
cuCtxPopCurrent(&dummy);
return 0;
}
static int cuda_transfer_data_to(AVHWFramesContext *ctx, AVFrame *dst,
const AVFrame *src)
{
CUDAFramesContext *priv = ctx->internal->priv;
AVCUDADeviceContext *device_hwctx = ctx->device_ctx->hwctx;
CUcontext dummy;
CUresult err;
int i;
err = cuCtxPushCurrent(device_hwctx->cuda_ctx);
if (err != CUDA_SUCCESS)
return AVERROR_UNKNOWN;
for (i = 0; i < FF_ARRAY_ELEMS(src->data) && src->data[i]; i++) {
CUDA_MEMCPY2D cpy = {
.srcMemoryType = CU_MEMORYTYPE_HOST,
.dstMemoryType = CU_MEMORYTYPE_DEVICE,
.srcHost = src->data[i],
.dstDevice = (CUdeviceptr)dst->data[i],
.srcPitch = src->linesize[i],
.dstPitch = dst->linesize[i],
.WidthInBytes = FFMIN(src->linesize[i], dst->linesize[i]),
.Height = src->height >> (i ? priv->shift_height : 0),
};
err = cuMemcpy2D(&cpy);
if (err != CUDA_SUCCESS) {
av_log(ctx, AV_LOG_ERROR, "Error transferring the data from the CUDA frame\n");
return AVERROR_UNKNOWN;
}
}
cuCtxPopCurrent(&dummy);
return 0;
}
const HWContextType ff_hwcontext_type_cuda = {
.type = AV_HWDEVICE_TYPE_CUDA,
.name = "CUDA",
.device_hwctx_size = sizeof(AVCUDADeviceContext),
.frames_priv_size = sizeof(CUDAFramesContext),
.frames_init = cuda_frames_init,
.frames_get_buffer = cuda_get_buffer,
.transfer_get_formats = cuda_transfer_get_formats,
.transfer_data_to = cuda_transfer_data_to,
.transfer_data_from = cuda_transfer_data_from,
.pix_fmts = (const enum AVPixelFormat[]){ AV_PIX_FMT_CUDA, AV_PIX_FMT_NONE },
};

46
libavutil/hwcontext_cuda.h Normal file
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@ -0,0 +1,46 @@
/*
* This file is part of Libav.
*
* Libav 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.
*
* Libav 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 Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef AVUTIL_HWCONTEXT_CUDA_H
#define AVUTIL_HWCONTEXT_CUDA_H
#include <cuda.h>
#include "pixfmt.h"
/**
* @file
* An API-specific header for AV_HWDEVICE_TYPE_CUDA.
*
* This API supports dynamic frame pools. AVHWFramesContext.pool must return
* AVBufferRefs whose data pointer is a CUdeviceptr.
*/
/**
* This struct is allocated as AVHWDeviceContext.hwctx
*/
typedef struct AVCUDADeviceContext {
CUcontext cuda_ctx;
} AVCUDADeviceContext;
/**
* AVHWFramesContext.hwctx is currently not used
*/
#endif /* AVUTIL_HWCONTEXT_CUDA_H */

1
libavutil/hwcontext_internal.h
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@ -86,6 +86,7 @@ struct AVHWFramesInternal {
AVBufferPool *pool_internal;
};
extern const HWContextType ff_hwcontext_type_cuda;
extern const HWContextType ff_hwcontext_type_vdpau;
#endif /* AVUTIL_HWCONTEXT_INTERNAL_H */