vf_chromakey_cuda.c File Reference

#include <float.h>
#include <stdio.h>
#include <string.h>
#include "libavutil/avstring.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 "formats.h"
#include "internal.h"
#include "video.h"
#include "cuda/load_helper.h"

Go to the source code of this file.

Data Structures
struct	ChromakeyCUDAContext

Macros
#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)
#define	FIXNUM(x)   lrint((x) * (1 << 10))
#define	RGB_TO_U(rgb)   (((-FIXNUM(0.16874) * rgb[0] - FIXNUM(0.33126) * rgb[1] + FIXNUM(0.50000) * rgb[2] + (1 << 9) - 1) >> 10) + 128)
#define	RGB_TO_V(rgb)   (((FIXNUM(0.50000) * rgb[0] - FIXNUM(0.41869) * rgb[1] - FIXNUM(0.08131) * rgb[2] + (1 << 9) - 1) >> 10) + 128)
#define	OFFSET(x)   offsetof(ChromakeyCUDAContext, x)
#define	FLAGS   (AV_OPT_FLAG_FILTERING_PARAM | AV_OPT_FLAG_VIDEO_PARAM)

Functions
static av_cold int	cudachromakey_init (AVFilterContext *ctx)
static av_cold void	cudachromakey_uninit (AVFilterContext *ctx)
static av_cold int	init_hwframe_ctx (ChromakeyCUDAContext *s, AVBufferRef *device_ctx, int width, int height)
static int	format_is_supported (enum AVPixelFormat fmt)
static av_cold void	set_format_info (AVFilterContext *ctx, enum AVPixelFormat in_format, enum AVPixelFormat out_format)
static av_cold int	init_processing_chain (AVFilterContext *ctx, int width, int height)
static av_cold int	cudachromakey_load_functions (AVFilterContext *ctx)
static av_cold int	cudachromakey_config_props (AVFilterLink *outlink)
static int	call_cuda_kernel (AVFilterContext *ctx, CUfunction func, CUtexObject src_tex[3], AVFrame *out_frame, int width, int height, int pitch, int width_uv, int height_uv, int pitch_uv, float u_key, float v_key, float similarity, float blend)
static int	cudachromakey_process_internal (AVFilterContext *ctx, AVFrame *out, AVFrame *in)
static int	cudachromakey_process (AVFilterContext *ctx, AVFrame *out, AVFrame *in)
static int	cudachromakey_filter_frame (AVFilterLink *link, AVFrame *in)

Variables
static enum AVPixelFormat	supported_formats []
static const AVOption	options []
static const AVClass	cudachromakey_class
static const AVFilterPad	cudachromakey_inputs []
static const AVFilterPad	cudachromakey_outputs []
const AVFilter	ff_vf_chromakey_cuda

Macro Definition Documentation

DIV_UP

#define DIV_UP	(		a,
			b
	)		(((a) + (b)-1) / (b))

Definition at line 46 of file vf_chromakey_cuda.c.

BLOCKX

#define BLOCKX   32

Definition at line 47 of file vf_chromakey_cuda.c.

BLOCKY

#define BLOCKY   16

Definition at line 48 of file vf_chromakey_cuda.c.

CHECK_CU

#define CHECK_CU

(

x

)

FF_CUDA_CHECK_DL(ctx, s->hwctx->internal->cuda_dl, x)

Definition at line 49 of file vf_chromakey_cuda.c.

FIXNUM

#define FIXNUM

(

x

)

lrint((x) * (1 << 10))

Definition at line 257 of file vf_chromakey_cuda.c.

RGB_TO_U

#define RGB_TO_U

(

rgb

)

(((-FIXNUM(0.16874) * rgb[0] - FIXNUM(0.33126) * rgb[1] + FIXNUM(0.50000) * rgb[2] + (1 << 9) - 1) >> 10) + 128)

Definition at line 258 of file vf_chromakey_cuda.c.

RGB_TO_V

#define RGB_TO_V

(

rgb

)

(((FIXNUM(0.50000) * rgb[0] - FIXNUM(0.41869) * rgb[1] - FIXNUM(0.08131) * rgb[2] + (1 << 9) - 1) >> 10) + 128)

Definition at line 259 of file vf_chromakey_cuda.c.

OFFSET

#define OFFSET

(

x

)

offsetof(ChromakeyCUDAContext, x)

Definition at line 449 of file vf_chromakey_cuda.c.

FLAGS

#define FLAGS   (AV_OPT_FLAG_FILTERING_PARAM | AV_OPT_FLAG_VIDEO_PARAM)

Definition at line 450 of file vf_chromakey_cuda.c.

Function Documentation

cudachromakey_init()

static av_cold int cudachromakey_init ( AVFilterContext *  ctx )

static

Definition at line 79 of file vf_chromakey_cuda.c.

cudachromakey_uninit()

static av_cold void cudachromakey_uninit ( AVFilterContext *  ctx )

static

Definition at line 94 of file vf_chromakey_cuda.c.

init_hwframe_ctx()

static av_cold int init_hwframe_ctx ( ChromakeyCUDAContext *  s, AVBufferRef *  device_ctx, int  width, int  height  )

static

Definition at line 114 of file vf_chromakey_cuda.c.

Referenced by init_processing_chain().

format_is_supported()

static int format_is_supported ( enum AVPixelFormat  fmt )

static

Definition at line 148 of file vf_chromakey_cuda.c.

Referenced by init_processing_chain().

set_format_info()

static av_cold void set_format_info ( AVFilterContext *  ctx, enum AVPixelFormat  in_format, enum AVPixelFormat  out_format  )

static

Definition at line 158 of file vf_chromakey_cuda.c.

Referenced by init_processing_chain().

init_processing_chain()

static av_cold int init_processing_chain ( AVFilterContext *  ctx, int  width, int  height  )

static

Definition at line 185 of file vf_chromakey_cuda.c.

Referenced by cudachromakey_config_props().

cudachromakey_load_functions()

static av_cold int cudachromakey_load_functions ( AVFilterContext *  ctx )

static

Definition at line 218 of file vf_chromakey_cuda.c.

Referenced by cudachromakey_config_props().

cudachromakey_config_props()

static av_cold int cudachromakey_config_props ( AVFilterLink *  outlink )

static

Definition at line 261 of file vf_chromakey_cuda.c.

call_cuda_kernel()

static int call_cuda_kernel ( AVFilterContext *  ctx, CUfunction  func, CUtexObject  src_tex[3], AVFrame *  out_frame, int  width, int  height, int  pitch, int  width_uv, int  height_uv, int  pitch_uv, float  u_key, float  v_key, float  similarity, float  blend  )

static

Definition at line 294 of file vf_chromakey_cuda.c.

Referenced by cudachromakey_process_internal().

cudachromakey_process_internal()

static int cudachromakey_process_internal ( AVFilterContext *  ctx, AVFrame *  out, AVFrame *  in  )

static

Definition at line 322 of file vf_chromakey_cuda.c.

Referenced by cudachromakey_process().

cudachromakey_process()

static int cudachromakey_process ( AVFilterContext *  ctx, AVFrame *  out, AVFrame *  in  )

static

Definition at line 388 of file vf_chromakey_cuda.c.

Referenced by cudachromakey_filter_frame().

cudachromakey_filter_frame()

static int cudachromakey_filter_frame ( AVFilterLink *  link, AVFrame *  in  )

static

Definition at line 413 of file vf_chromakey_cuda.c.

Variable Documentation

supported_formats

enum AVPixelFormat supported_formats[]

static

Initial value:

= {
    AV_PIX_FMT_YUV420P,
    AV_PIX_FMT_NV12,
    AV_PIX_FMT_YUVA420P
}

Definition at line 40 of file vf_chromakey_cuda.c.

Referenced by format_is_supported().

options

const AVOption options[]

static

Initial value:

= {
    {"color", "set the chromakey key color", OFFSET(chromakey_rgba), AV_OPT_TYPE_COLOR, {.str = "black"}, 0, 0, FLAGS},
    {"similarity", "set the chromakey similarity value", OFFSET(similarity), AV_OPT_TYPE_FLOAT, {.dbl = 0.01}, 0.01, 1.0, FLAGS},
    {"blend", "set the chromakey key blend value", OFFSET(blend), AV_OPT_TYPE_FLOAT, {.dbl = 0.0}, 0.0, 1.0, FLAGS},
    {"yuv", "color parameter is in yuv instead of rgb", OFFSET(is_yuv), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, FLAGS},
    {NULL},
}

Definition at line 451 of file vf_chromakey_cuda.c.

cudachromakey_class

const AVClass cudachromakey_class

static

Initial value:

= {
    .class_name = "cudachromakey",
    .item_name = av_default_item_name,
    .option = options,
    .version = LIBAVUTIL_VERSION_INT,
}

Definition at line 459 of file vf_chromakey_cuda.c.

cudachromakey_inputs

const AVFilterPad cudachromakey_inputs[]

static

Initial value:

= {
    {
        .name = "default",
        .type = AVMEDIA_TYPE_VIDEO,
        .filter_frame = cudachromakey_filter_frame,
    },
}

Definition at line 466 of file vf_chromakey_cuda.c.

cudachromakey_outputs

const AVFilterPad cudachromakey_outputs[]

static

Initial value:

= {
    {
        .name = "default",
        .type = AVMEDIA_TYPE_VIDEO,
        .config_props = cudachromakey_config_props,
    },
}

Definition at line 474 of file vf_chromakey_cuda.c.

ff_vf_chromakey_cuda

const AVFilter ff_vf_chromakey_cuda

Initial value:

= {
    .name = "chromakey_cuda",
    .description = NULL_IF_CONFIG_SMALL("GPU accelerated chromakey filter"),
 
    .init = cudachromakey_init,
    .uninit = cudachromakey_uninit,
 
    .priv_size = sizeof(ChromakeyCUDAContext),
    .priv_class = &cudachromakey_class,
 
    FILTER_INPUTS(cudachromakey_inputs),
    FILTER_OUTPUTS(cudachromakey_outputs),
 
    FILTER_SINGLE_PIXFMT(AV_PIX_FMT_CUDA),
 
    .flags_internal = FF_FILTER_FLAG_HWFRAME_AWARE,
}

Definition at line 482 of file vf_chromakey_cuda.c.