ffmpeg/libavutil/hwcontext_cuda.c

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/*
* This file is part of FFmpeg.
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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
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* 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
* 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 FFmpeg; if not, write to the Free Software
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* 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_internal.h"
#include "cuda_check.h"
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#include "mem.h"
#include "pixdesc.h"
#include "pixfmt.h"
#include "imgutils.h"
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#define CUDA_FRAME_ALIGNMENT 256
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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,
AV_PIX_FMT_P010,
AV_PIX_FMT_P016,
AV_PIX_FMT_YUV444P16,
AV_PIX_FMT_0RGB32,
AV_PIX_FMT_0BGR32,
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};
#define CHECK_CU(x) FF_CUDA_CHECK_DL(device_ctx, cu, x)
static int cuda_frames_get_constraints(AVHWDeviceContext *ctx,
const void *hwconfig,
AVHWFramesConstraints *constraints)
{
int i;
constraints->valid_sw_formats = av_malloc_array(FF_ARRAY_ELEMS(supported_formats) + 1,
sizeof(*constraints->valid_sw_formats));
if (!constraints->valid_sw_formats)
return AVERROR(ENOMEM);
for (i = 0; i < FF_ARRAY_ELEMS(supported_formats); i++)
constraints->valid_sw_formats[i] = supported_formats[i];
constraints->valid_sw_formats[FF_ARRAY_ELEMS(supported_formats)] = AV_PIX_FMT_NONE;
constraints->valid_hw_formats = av_malloc_array(2, sizeof(*constraints->valid_hw_formats));
if (!constraints->valid_hw_formats)
return AVERROR(ENOMEM);
constraints->valid_hw_formats[0] = AV_PIX_FMT_CUDA;
constraints->valid_hw_formats[1] = AV_PIX_FMT_NONE;
return 0;
}
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static void cuda_buffer_free(void *opaque, uint8_t *data)
{
AVHWFramesContext *ctx = opaque;
AVHWDeviceContext *device_ctx = ctx->device_ctx;
AVCUDADeviceContext *hwctx = device_ctx->hwctx;
CudaFunctions *cu = hwctx->internal->cuda_dl;
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CUcontext dummy;
CHECK_CU(cu->cuCtxPushCurrent(hwctx->cuda_ctx));
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CHECK_CU(cu->cuMemFree((CUdeviceptr)data));
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CHECK_CU(cu->cuCtxPopCurrent(&dummy));
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}
static AVBufferRef *cuda_pool_alloc(void *opaque, int size)
{
AVHWFramesContext *ctx = opaque;
AVHWDeviceContext *device_ctx = ctx->device_ctx;
AVCUDADeviceContext *hwctx = device_ctx->hwctx;
CudaFunctions *cu = hwctx->internal->cuda_dl;
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AVBufferRef *ret = NULL;
CUcontext dummy = NULL;
CUdeviceptr data;
int err;
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err = CHECK_CU(cu->cuCtxPushCurrent(hwctx->cuda_ctx));
if (err < 0)
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return NULL;
err = CHECK_CU(cu->cuMemAlloc(&data, size));
if (err < 0)
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goto fail;
ret = av_buffer_create((uint8_t*)data, size, cuda_buffer_free, ctx, 0);
if (!ret) {
CHECK_CU(cu->cuMemFree(data));
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goto fail;
}
fail:
CHECK_CU(cu->cuCtxPopCurrent(&dummy));
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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 = av_image_get_buffer_size(ctx->sw_format, ctx->width, ctx->height, CUDA_FRAME_ALIGNMENT);
if (size < 0)
return size;
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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)
{
int res;
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frame->buf[0] = av_buffer_pool_get(ctx->pool);
if (!frame->buf[0])
return AVERROR(ENOMEM);
res = av_image_fill_arrays(frame->data, frame->linesize, frame->buf[0]->data,
ctx->sw_format, ctx->width, ctx->height, CUDA_FRAME_ALIGNMENT);
if (res < 0)
return res;
// YUV420P is a special case.
// Nvenc expects the U/V planes in swapped order from how ffmpeg expects them, also chroma is half-aligned
if (ctx->sw_format == AV_PIX_FMT_YUV420P) {
frame->linesize[1] = frame->linesize[2] = frame->linesize[0] / 2;
frame->data[2] = frame->data[1];
frame->data[1] = frame->data[2] + frame->linesize[2] * ctx->height / 2;
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}
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;
AVHWDeviceContext *device_ctx = ctx->device_ctx;
AVCUDADeviceContext *hwctx = device_ctx->hwctx;
CudaFunctions *cu = hwctx->internal->cuda_dl;
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CUcontext dummy;
int i, ret;
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ret = CHECK_CU(cu->cuCtxPushCurrent(hwctx->cuda_ctx));
if (ret < 0)
return ret;
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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),
};
ret = CHECK_CU(cu->cuMemcpy2DAsync(&cpy, hwctx->stream));
if (ret < 0)
goto exit;
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}
ret = CHECK_CU(cu->cuStreamSynchronize(hwctx->stream));
if (ret < 0)
goto exit;
exit:
CHECK_CU(cu->cuCtxPopCurrent(&dummy));
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return 0;
}
static int cuda_transfer_data_to(AVHWFramesContext *ctx, AVFrame *dst,
const AVFrame *src)
{
CUDAFramesContext *priv = ctx->internal->priv;
AVHWDeviceContext *device_ctx = ctx->device_ctx;
AVCUDADeviceContext *hwctx = device_ctx->hwctx;
CudaFunctions *cu = hwctx->internal->cuda_dl;
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CUcontext dummy;
int i, ret;
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ret = CHECK_CU(cu->cuCtxPushCurrent(hwctx->cuda_ctx));
if (ret < 0)
return ret;
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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),
};
ret = CHECK_CU(cu->cuMemcpy2DAsync(&cpy, hwctx->stream));
if (ret < 0)
goto exit;
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}
exit:
CHECK_CU(cu->cuCtxPopCurrent(&dummy));
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return 0;
}
static void cuda_device_uninit(AVHWDeviceContext *device_ctx)
{
AVCUDADeviceContext *hwctx = device_ctx->hwctx;
if (hwctx->internal) {
CudaFunctions *cu = hwctx->internal->cuda_dl;
if (hwctx->internal->is_allocated && hwctx->cuda_ctx) {
if (hwctx->internal->flags & AV_CUDA_USE_PRIMARY_CONTEXT)
CHECK_CU(cu->cuDevicePrimaryCtxRelease(hwctx->internal->cuda_device));
else
CHECK_CU(cu->cuCtxDestroy(hwctx->cuda_ctx));
hwctx->cuda_ctx = NULL;
}
cuda_free_functions(&hwctx->internal->cuda_dl);
}
av_freep(&hwctx->internal);
}
static int cuda_device_init(AVHWDeviceContext *ctx)
{
AVCUDADeviceContext *hwctx = ctx->hwctx;
int ret;
if (!hwctx->internal) {
hwctx->internal = av_mallocz(sizeof(*hwctx->internal));
if (!hwctx->internal)
return AVERROR(ENOMEM);
}
if (!hwctx->internal->cuda_dl) {
ret = cuda_load_functions(&hwctx->internal->cuda_dl, ctx);
if (ret < 0) {
av_log(ctx, AV_LOG_ERROR, "Could not dynamically load CUDA\n");
goto error;
}
}
return 0;
error:
cuda_device_uninit(ctx);
return ret;
}
static int cuda_device_create(AVHWDeviceContext *device_ctx,
const char *device,
AVDictionary *opts, int flags)
{
AVCUDADeviceContext *hwctx = device_ctx->hwctx;
CudaFunctions *cu;
CUcontext dummy;
int ret, dev_active = 0, device_idx = 0;
unsigned int dev_flags = 0;
const unsigned int desired_flags = CU_CTX_SCHED_BLOCKING_SYNC;
if (device)
device_idx = strtol(device, NULL, 0);
if (cuda_device_init(device_ctx) < 0)
goto error;
cu = hwctx->internal->cuda_dl;
ret = CHECK_CU(cu->cuInit(0));
if (ret < 0)
goto error;
ret = CHECK_CU(cu->cuDeviceGet(&hwctx->internal->cuda_device, device_idx));
if (ret < 0)
goto error;
hwctx->internal->flags = flags;
if (flags & AV_CUDA_USE_PRIMARY_CONTEXT) {
ret = CHECK_CU(cu->cuDevicePrimaryCtxGetState(hwctx->internal->cuda_device, &dev_flags, &dev_active));
if (ret < 0)
goto error;
if (dev_active && dev_flags != desired_flags) {
av_log(device_ctx, AV_LOG_ERROR, "Primary context already active with incompatible flags.\n");
goto error;
} else if (dev_flags != desired_flags) {
ret = CHECK_CU(cu->cuDevicePrimaryCtxSetFlags(hwctx->internal->cuda_device, desired_flags));
if (ret < 0)
goto error;
}
ret = CHECK_CU(cu->cuDevicePrimaryCtxRetain(&hwctx->cuda_ctx, hwctx->internal->cuda_device));
if (ret < 0)
goto error;
} else {
ret = CHECK_CU(cu->cuCtxCreate(&hwctx->cuda_ctx, desired_flags, hwctx->internal->cuda_device));
if (ret < 0)
goto error;
CHECK_CU(cu->cuCtxPopCurrent(&dummy));
}
hwctx->internal->is_allocated = 1;
// Setting stream to NULL will make functions automatically use the default CUstream
hwctx->stream = NULL;
return 0;
error:
cuda_device_uninit(device_ctx);
return AVERROR_UNKNOWN;
}
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const HWContextType ff_hwcontext_type_cuda = {
.type = AV_HWDEVICE_TYPE_CUDA,
.name = "CUDA",
.device_hwctx_size = sizeof(AVCUDADeviceContext),
.frames_priv_size = sizeof(CUDAFramesContext),
.device_create = cuda_device_create,
.device_init = cuda_device_init,
.device_uninit = cuda_device_uninit,
.frames_get_constraints = cuda_frames_get_constraints,
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.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 },
};