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ffmpeg/libavfilter/vf_scale_cuda.c

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/*
* Copyright (c) 2017, NVIDIA CORPORATION. All rights reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*/
#include <float.h>
#include <stdio.h>
#include "libavutil/common.h"
#include "libavutil/hwcontext.h"
#include "libavutil/hwcontext_cuda_internal.h"
#include "libavutil/cuda_check.h"
#include "libavutil/internal.h"
#include "libavutil/opt.h"
#include "libavutil/pixdesc.h"
#include "avfilter.h"
#include "internal.h"
#include "scale_eval.h"
#include "video.h"
#include "cuda/load_helper.h"
#include "vf_scale_cuda.h"
static const enum AVPixelFormat supported_formats[] = {
AV_PIX_FMT_YUV420P,
AV_PIX_FMT_NV12,
AV_PIX_FMT_YUV444P,
AV_PIX_FMT_P010,
AV_PIX_FMT_P016,
AV_PIX_FMT_YUV444P16,
AV_PIX_FMT_0RGB32,
AV_PIX_FMT_0BGR32,
AV_PIX_FMT_RGB32,
AV_PIX_FMT_BGR32,
};
#define DIV_UP(a, b) ( ((a) + (b) - 1) / (b) )
#define BLOCKX 32
#define BLOCKY 16
#define CHECK_CU(x) FF_CUDA_CHECK_DL(ctx, s->hwctx->internal->cuda_dl, x)
enum {
INTERP_ALGO_DEFAULT,
INTERP_ALGO_NEAREST,
INTERP_ALGO_BILINEAR,
INTERP_ALGO_BICUBIC,
INTERP_ALGO_LANCZOS,
INTERP_ALGO_COUNT
};
typedef struct CUDAScaleContext {
const AVClass *class;
AVCUDADeviceContext *hwctx;
enum AVPixelFormat in_fmt, out_fmt;
const AVPixFmtDescriptor *in_desc, *out_desc;
int in_planes, out_planes;
int in_plane_depths[4];
int in_plane_channels[4];
AVBufferRef *frames_ctx;
AVFrame *frame;
AVFrame *tmp_frame;
int passthrough;
/**
* Output sw format. AV_PIX_FMT_NONE for no conversion.
*/
enum AVPixelFormat format;
char *w_expr; ///< width expression string
char *h_expr; ///< height expression string
int force_original_aspect_ratio;
int force_divisible_by;
CUcontext cu_ctx;
CUmodule cu_module;
CUfunction cu_func;
CUfunction cu_func_uv;
CUstream cu_stream;
int interp_algo;
int interp_use_linear;
int interp_as_integer;
float param;
} CUDAScaleContext;
static av_cold int cudascale_init(AVFilterContext *ctx)
{
CUDAScaleContext *s = ctx->priv;
s->frame = av_frame_alloc();
if (!s->frame)
return AVERROR(ENOMEM);
s->tmp_frame = av_frame_alloc();
if (!s->tmp_frame)
return AVERROR(ENOMEM);
return 0;
}
static av_cold void cudascale_uninit(AVFilterContext *ctx)
{
CUDAScaleContext *s = ctx->priv;
if (s->hwctx && s->cu_module) {
CudaFunctions *cu = s->hwctx->internal->cuda_dl;
CUcontext dummy;
CHECK_CU(cu->cuCtxPushCurrent(s->hwctx->cuda_ctx));
CHECK_CU(cu->cuModuleUnload(s->cu_module));
s->cu_module = NULL;
CHECK_CU(cu->cuCtxPopCurrent(&dummy));
}
av_frame_free(&s->frame);
av_buffer_unref(&s->frames_ctx);
av_frame_free(&s->tmp_frame);
}
static av_cold int init_hwframe_ctx(CUDAScaleContext *s, AVBufferRef *device_ctx, int width, int height)
{
AVBufferRef *out_ref = NULL;
AVHWFramesContext *out_ctx;
int ret;
out_ref = av_hwframe_ctx_alloc(device_ctx);
if (!out_ref)
return AVERROR(ENOMEM);
out_ctx = (AVHWFramesContext*)out_ref->data;
out_ctx->format = AV_PIX_FMT_CUDA;
out_ctx->sw_format = s->out_fmt;
out_ctx->width = FFALIGN(width, 32);
out_ctx->height = FFALIGN(height, 32);
ret = av_hwframe_ctx_init(out_ref);
if (ret < 0)
goto fail;
av_frame_unref(s->frame);
ret = av_hwframe_get_buffer(out_ref, s->frame, 0);
if (ret < 0)
goto fail;
s->frame->width = width;
s->frame->height = height;
av_buffer_unref(&s->frames_ctx);
s->frames_ctx = out_ref;
return 0;
fail:
av_buffer_unref(&out_ref);
return ret;
}
static int format_is_supported(enum AVPixelFormat fmt)
{
int i;
for (i = 0; i < FF_ARRAY_ELEMS(supported_formats); i++)
if (supported_formats[i] == fmt)
return 1;
return 0;
}
static av_cold void set_format_info(AVFilterContext *ctx, enum AVPixelFormat in_format, enum AVPixelFormat out_format)
{
CUDAScaleContext *s = ctx->priv;
int i, p, d;
s->in_fmt = in_format;
s->out_fmt = out_format;
s->in_desc = av_pix_fmt_desc_get(s->in_fmt);
s->out_desc = av_pix_fmt_desc_get(s->out_fmt);
s->in_planes = av_pix_fmt_count_planes(s->in_fmt);
s->out_planes = av_pix_fmt_count_planes(s->out_fmt);
// find maximum step of each component of each plane
// For our subset of formats, this should accurately tell us how many channels CUDA needs
// i.e. 1 for Y plane, 2 for UV plane of NV12, 4 for single plane of RGB0 formats
for (i = 0; i < s->in_desc->nb_components; i++) {
d = (s->in_desc->comp[i].depth + 7) / 8;
p = s->in_desc->comp[i].plane;
s->in_plane_channels[p] = FFMAX(s->in_plane_channels[p], s->in_desc->comp[i].step / d);
s->in_plane_depths[p] = s->in_desc->comp[i].depth;
}
}
static av_cold int init_processing_chain(AVFilterContext *ctx, int in_width, int in_height,
int out_width, int out_height)
{
CUDAScaleContext *s = ctx->priv;
AVHWFramesContext *in_frames_ctx;
enum AVPixelFormat in_format;
enum AVPixelFormat out_format;
int ret;
/* check that we have a hw context */
if (!ctx->inputs[0]->hw_frames_ctx) {
av_log(ctx, AV_LOG_ERROR, "No hw context provided on input\n");
return AVERROR(EINVAL);
}
in_frames_ctx = (AVHWFramesContext*)ctx->inputs[0]->hw_frames_ctx->data;
in_format = in_frames_ctx->sw_format;
out_format = (s->format == AV_PIX_FMT_NONE) ? in_format : s->format;
if (!format_is_supported(in_format)) {
av_log(ctx, AV_LOG_ERROR, "Unsupported input format: %s\n",
av_get_pix_fmt_name(in_format));
return AVERROR(ENOSYS);
}
if (!format_is_supported(out_format)) {
av_log(ctx, AV_LOG_ERROR, "Unsupported output format: %s\n",
av_get_pix_fmt_name(out_format));
return AVERROR(ENOSYS);
}
set_format_info(ctx, in_format, out_format);
if (s->passthrough && in_width == out_width && in_height == out_height && in_format == out_format) {
s->frames_ctx = av_buffer_ref(ctx->inputs[0]->hw_frames_ctx);
if (!s->frames_ctx)
return AVERROR(ENOMEM);
} else {
s->passthrough = 0;
ret = init_hwframe_ctx(s, in_frames_ctx->device_ref, out_width, out_height);
if (ret < 0)
return ret;
if (in_width == out_width && in_height == out_height &&
in_format == out_format && s->interp_algo == INTERP_ALGO_DEFAULT)
s->interp_algo = INTERP_ALGO_NEAREST;
}
ctx->outputs[0]->hw_frames_ctx = av_buffer_ref(s->frames_ctx);
if (!ctx->outputs[0]->hw_frames_ctx)
return AVERROR(ENOMEM);
return 0;
}
static av_cold int cudascale_load_functions(AVFilterContext *ctx)
{
CUDAScaleContext *s = ctx->priv;
CUcontext dummy, cuda_ctx = s->hwctx->cuda_ctx;
CudaFunctions *cu = s->hwctx->internal->cuda_dl;
char buf[128];
int ret;
const char *in_fmt_name = av_get_pix_fmt_name(s->in_fmt);
const char *out_fmt_name = av_get_pix_fmt_name(s->out_fmt);
const char *function_infix = "";
extern const unsigned char ff_vf_scale_cuda_ptx_data[];
extern const unsigned int ff_vf_scale_cuda_ptx_len;
switch(s->interp_algo) {
case INTERP_ALGO_NEAREST:
function_infix = "Nearest";
s->interp_use_linear = 0;
s->interp_as_integer = 1;
break;
case INTERP_ALGO_BILINEAR:
function_infix = "Bilinear";
s->interp_use_linear = 1;
s->interp_as_integer = 1;
break;
case INTERP_ALGO_DEFAULT:
case INTERP_ALGO_BICUBIC:
function_infix = "Bicubic";
s->interp_use_linear = 0;
s->interp_as_integer = 0;
break;
case INTERP_ALGO_LANCZOS:
function_infix = "Lanczos";
s->interp_use_linear = 0;
s->interp_as_integer = 0;
break;
default:
av_log(ctx, AV_LOG_ERROR, "Unknown interpolation algorithm\n");
return AVERROR_BUG;
}
ret = CHECK_CU(cu->cuCtxPushCurrent(cuda_ctx));
if (ret < 0)
return ret;
ret = ff_cuda_load_module(ctx, s->hwctx, &s->cu_module,
ff_vf_scale_cuda_ptx_data, ff_vf_scale_cuda_ptx_len);
if (ret < 0)
goto fail;
snprintf(buf, sizeof(buf), "Subsample_%s_%s_%s", function_infix, in_fmt_name, out_fmt_name);
ret = CHECK_CU(cu->cuModuleGetFunction(&s->cu_func, s->cu_module, buf));
if (ret < 0) {
av_log(ctx, AV_LOG_FATAL, "Unsupported conversion: %s -> %s\n", in_fmt_name, out_fmt_name);
ret = AVERROR(ENOSYS);
goto fail;
}
snprintf(buf, sizeof(buf), "Subsample_%s_%s_%s_uv", function_infix, in_fmt_name, out_fmt_name);
ret = CHECK_CU(cu->cuModuleGetFunction(&s->cu_func_uv, s->cu_module, buf));
if (ret < 0)
goto fail;
fail:
CHECK_CU(cu->cuCtxPopCurrent(&dummy));
return ret;
}
static av_cold int cudascale_config_props(AVFilterLink *outlink)
{
AVFilterContext *ctx = outlink->src;
AVFilterLink *inlink = outlink->src->inputs[0];
CUDAScaleContext *s = ctx->priv;
AVHWFramesContext *frames_ctx = (AVHWFramesContext*)inlink->hw_frames_ctx->data;
AVCUDADeviceContext *device_hwctx = frames_ctx->device_ctx->hwctx;
int w, h;
int ret;
s->hwctx = device_hwctx;
s->cu_stream = s->hwctx->stream;
if ((ret = ff_scale_eval_dimensions(s,
s->w_expr, s->h_expr,
inlink, outlink,
&w, &h)) < 0)
goto fail;
ff_scale_adjust_dimensions(inlink, &w, &h,
s->force_original_aspect_ratio, s->force_divisible_by);
if (((int64_t)h * inlink->w) > INT_MAX ||
((int64_t)w * inlink->h) > INT_MAX)
av_log(ctx, AV_LOG_ERROR, "Rescaled value for width or height is too big.\n");
outlink->w = w;
outlink->h = h;
ret = init_processing_chain(ctx, inlink->w, inlink->h, w, h);
if (ret < 0)
return ret;
if (inlink->sample_aspect_ratio.num) {
outlink->sample_aspect_ratio = av_mul_q((AVRational){outlink->h*inlink->w,
outlink->w*inlink->h},
inlink->sample_aspect_ratio);
} else {
outlink->sample_aspect_ratio = inlink->sample_aspect_ratio;
}
av_log(ctx, AV_LOG_VERBOSE, "w:%d h:%d fmt:%s -> w:%d h:%d fmt:%s%s\n",
inlink->w, inlink->h, av_get_pix_fmt_name(s->in_fmt),
outlink->w, outlink->h, av_get_pix_fmt_name(s->out_fmt),
s->passthrough ? " (passthrough)" : "");
ret = cudascale_load_functions(ctx);
if (ret < 0)
return ret;
return 0;
fail:
return ret;
}
static int call_resize_kernel(AVFilterContext *ctx, CUfunction func,
CUtexObject src_tex[4], int src_width, int src_height,
AVFrame *out_frame, int dst_width, int dst_height, int dst_pitch)
{
CUDAScaleContext *s = ctx->priv;
CudaFunctions *cu = s->hwctx->internal->cuda_dl;
CUdeviceptr dst_devptr[4] = {
(CUdeviceptr)out_frame->data[0], (CUdeviceptr)out_frame->data[1],
(CUdeviceptr)out_frame->data[2], (CUdeviceptr)out_frame->data[3]
};
void *args_uchar[] = {
&src_tex[0], &src_tex[1], &src_tex[2], &src_tex[3],
&dst_devptr[0], &dst_devptr[1], &dst_devptr[2], &dst_devptr[3],
&dst_width, &dst_height, &dst_pitch,
&src_width, &src_height, &s->param
};
return CHECK_CU(cu->cuLaunchKernel(func,
DIV_UP(dst_width, BLOCKX), DIV_UP(dst_height, BLOCKY), 1,
BLOCKX, BLOCKY, 1, 0, s->cu_stream, args_uchar, NULL));
}
static int scalecuda_resize(AVFilterContext *ctx,
AVFrame *out, AVFrame *in)
{
CUDAScaleContext *s = ctx->priv;
CudaFunctions *cu = s->hwctx->internal->cuda_dl;
CUcontext dummy, cuda_ctx = s->hwctx->cuda_ctx;
int i, ret;
CUtexObject tex[4] = { 0, 0, 0, 0 };
ret = CHECK_CU(cu->cuCtxPushCurrent(cuda_ctx));
if (ret < 0)
return ret;
for (i = 0; i < s->in_planes; i++) {
CUDA_TEXTURE_DESC tex_desc = {
.filterMode = s->interp_use_linear ?
CU_TR_FILTER_MODE_LINEAR :
CU_TR_FILTER_MODE_POINT,
.flags = s->interp_as_integer ? CU_TRSF_READ_AS_INTEGER : 0,
};
CUDA_RESOURCE_DESC res_desc = {
.resType = CU_RESOURCE_TYPE_PITCH2D,
.res.pitch2D.format = s->in_plane_depths[i] <= 8 ?
CU_AD_FORMAT_UNSIGNED_INT8 :
CU_AD_FORMAT_UNSIGNED_INT16,
.res.pitch2D.numChannels = s->in_plane_channels[i],
.res.pitch2D.pitchInBytes = in->linesize[i],
.res.pitch2D.devPtr = (CUdeviceptr)in->data[i],
};
if (i == 1 || i == 2) {
res_desc.res.pitch2D.width = AV_CEIL_RSHIFT(in->width, s->in_desc->log2_chroma_w);
res_desc.res.pitch2D.height = AV_CEIL_RSHIFT(in->height, s->in_desc->log2_chroma_h);
} else {
res_desc.res.pitch2D.width = in->width;
res_desc.res.pitch2D.height = in->height;
}
ret = CHECK_CU(cu->cuTexObjectCreate(&tex[i], &res_desc, &tex_desc, NULL));
if (ret < 0)
goto exit;
}
// scale primary plane(s). Usually Y (and A), or single plane of RGB frames.
ret = call_resize_kernel(ctx, s->cu_func,
tex, in->width, in->height,
out, out->width, out->height, out->linesize[0]);
if (ret < 0)
goto exit;
if (s->out_planes > 1) {
// scale UV plane. Scale function sets both U and V plane, or singular interleaved plane.
ret = call_resize_kernel(ctx, s->cu_func_uv, tex,
AV_CEIL_RSHIFT(in->width, s->in_desc->log2_chroma_w),
AV_CEIL_RSHIFT(in->height, s->in_desc->log2_chroma_h),
out,
AV_CEIL_RSHIFT(out->width, s->out_desc->log2_chroma_w),
AV_CEIL_RSHIFT(out->height, s->out_desc->log2_chroma_h),
out->linesize[1]);
if (ret < 0)
goto exit;
}
exit:
for (i = 0; i < s->in_planes; i++)
if (tex[i])
CHECK_CU(cu->cuTexObjectDestroy(tex[i]));
CHECK_CU(cu->cuCtxPopCurrent(&dummy));
return ret;
}
static int cudascale_scale(AVFilterContext *ctx, AVFrame *out, AVFrame *in)
{
CUDAScaleContext *s = ctx->priv;
AVFilterLink *outlink = ctx->outputs[0];
AVFrame *src = in;
int ret;
ret = scalecuda_resize(ctx, s->frame, src);
if (ret < 0)
return ret;
src = s->frame;
ret = av_hwframe_get_buffer(src->hw_frames_ctx, s->tmp_frame, 0);
if (ret < 0)
return ret;
av_frame_move_ref(out, s->frame);
av_frame_move_ref(s->frame, s->tmp_frame);
s->frame->width = outlink->w;
s->frame->height = outlink->h;
ret = av_frame_copy_props(out, in);
if (ret < 0)
return ret;
return 0;
}
static int cudascale_filter_frame(AVFilterLink *link, AVFrame *in)
{
AVFilterContext *ctx = link->dst;
CUDAScaleContext *s = ctx->priv;
AVFilterLink *outlink = ctx->outputs[0];
CudaFunctions *cu = s->hwctx->internal->cuda_dl;
AVFrame *out = NULL;
CUcontext dummy;
int ret = 0;
if (s->passthrough)
return ff_filter_frame(outlink, in);
out = av_frame_alloc();
if (!out) {
ret = AVERROR(ENOMEM);
goto fail;
}
ret = CHECK_CU(cu->cuCtxPushCurrent(s->hwctx->cuda_ctx));
if (ret < 0)
goto fail;
ret = cudascale_scale(ctx, out, in);
CHECK_CU(cu->cuCtxPopCurrent(&dummy));
if (ret < 0)
goto fail;
av_reduce(&out->sample_aspect_ratio.num, &out->sample_aspect_ratio.den,
(int64_t)in->sample_aspect_ratio.num * outlink->h * link->w,
(int64_t)in->sample_aspect_ratio.den * outlink->w * link->h,
INT_MAX);
av_frame_free(&in);
return ff_filter_frame(outlink, out);
fail:
av_frame_free(&in);
av_frame_free(&out);
return ret;
}
static AVFrame *cudascale_get_video_buffer(AVFilterLink *inlink, int w, int h)
{
CUDAScaleContext *s = inlink->dst->priv;
return s->passthrough ?
ff_null_get_video_buffer (inlink, w, h) :
ff_default_get_video_buffer(inlink, w, h);
}
#define OFFSET(x) offsetof(CUDAScaleContext, x)
#define FLAGS (AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM)
static const AVOption options[] = {
{ "w", "Output video width", OFFSET(w_expr), AV_OPT_TYPE_STRING, { .str = "iw" }, .flags = FLAGS },
{ "h", "Output video height", OFFSET(h_expr), AV_OPT_TYPE_STRING, { .str = "ih" }, .flags = FLAGS },
{ "interp_algo", "Interpolation algorithm used for resizing", OFFSET(interp_algo), AV_OPT_TYPE_INT, { .i64 = INTERP_ALGO_DEFAULT }, 0, INTERP_ALGO_COUNT - 1, FLAGS, .unit = "interp_algo" },
{ "nearest", "nearest neighbour", 0, AV_OPT_TYPE_CONST, { .i64 = INTERP_ALGO_NEAREST }, 0, 0, FLAGS, .unit = "interp_algo" },
{ "bilinear", "bilinear", 0, AV_OPT_TYPE_CONST, { .i64 = INTERP_ALGO_BILINEAR }, 0, 0, FLAGS, .unit = "interp_algo" },
{ "bicubic", "bicubic", 0, AV_OPT_TYPE_CONST, { .i64 = INTERP_ALGO_BICUBIC }, 0, 0, FLAGS, .unit = "interp_algo" },
{ "lanczos", "lanczos", 0, AV_OPT_TYPE_CONST, { .i64 = INTERP_ALGO_LANCZOS }, 0, 0, FLAGS, .unit = "interp_algo" },
{ "format", "Output video pixel format", OFFSET(format), AV_OPT_TYPE_PIXEL_FMT, { .i64 = AV_PIX_FMT_NONE }, INT_MIN, INT_MAX, .flags=FLAGS },
{ "passthrough", "Do not process frames at all if parameters match", OFFSET(passthrough), AV_OPT_TYPE_BOOL, { .i64 = 1 }, 0, 1, FLAGS },
{ "param", "Algorithm-Specific parameter", OFFSET(param), AV_OPT_TYPE_FLOAT, { .dbl = SCALE_CUDA_PARAM_DEFAULT }, -FLT_MAX, FLT_MAX, FLAGS },
{ "force_original_aspect_ratio", "decrease or increase w/h if necessary to keep the original AR", OFFSET(force_original_aspect_ratio), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 2, FLAGS, .unit = "force_oar" },
{ "disable", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = 0 }, 0, 0, FLAGS, .unit = "force_oar" },
{ "decrease", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = 1 }, 0, 0, FLAGS, .unit = "force_oar" },
{ "increase", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = 2 }, 0, 0, FLAGS, .unit = "force_oar" },
{ "force_divisible_by", "enforce that the output resolution is divisible by a defined integer when force_original_aspect_ratio is used", OFFSET(force_divisible_by), AV_OPT_TYPE_INT, { .i64 = 1 }, 1, 256, FLAGS },
{ NULL },
};
static const AVClass cudascale_class = {
.class_name = "cudascale",
.item_name = av_default_item_name,
.option = options,
.version = LIBAVUTIL_VERSION_INT,
};
static const AVFilterPad cudascale_inputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.filter_frame = cudascale_filter_frame,
.get_buffer.video = cudascale_get_video_buffer,
},
};
static const AVFilterPad cudascale_outputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.config_props = cudascale_config_props,
},
};
const AVFilter ff_vf_scale_cuda = {
.name = "scale_cuda",
.description = NULL_IF_CONFIG_SMALL("GPU accelerated video resizer"),
.init = cudascale_init,
.uninit = cudascale_uninit,
.priv_size = sizeof(CUDAScaleContext),
.priv_class = &cudascale_class,
FILTER_INPUTS(cudascale_inputs),
FILTER_OUTPUTS(cudascale_outputs),
FILTER_SINGLE_PIXFMT(AV_PIX_FMT_CUDA),
.flags_internal = FF_FILTER_FLAG_HWFRAME_AWARE,
};
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