vf_coreimage.m File Reference

Video processing based on Apple's CoreImage API. More...

#import <QuartzCore/CoreImage.h>
#import <AppKit/AppKit.h>
#include "avfilter.h"
#include "formats.h"
#include "internal.h"
#include "video.h"
#include "libavutil/internal.h"
#include "libavutil/opt.h"
#include "libavutil/pixdesc.h"

Go to the source code of this file.

Data Structures
struct	CoreImageContext

Macros
#define	CLAMP_WARNING
#define	SafeCFRelease(ptr)
#define	OFFSET(x)   offsetof(CoreImageContext, x)
#define	FLAGS   AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
#define	GENERATOR_OPTIONS
#define	FILTER_OPTIONS

Functions
static int	config_output (AVFilterLink *link)
static int	config_input (AVFilterLink *link)
	Determine image properties from input link of filter chain. More...
static void	list_filters (CoreImageContext *ctx)
	Print a list of all available filters including options and respective value ranges and defaults. More...
static int	query_formats (AVFilterContext *fctx)
static int	query_formats_src (AVFilterContext *fctx)
static int	apply_filter (CoreImageContext *ctx, AVFilterLink *link, AVFrame *frame)
static int	filter_frame (AVFilterLink *link, AVFrame *frame)
	Apply all valid filters successively to the input image. More...
static int	request_frame (AVFilterLink *link)
static void	set_option (CoreImageContext *ctx, CIFilter *filter, const char *key, const char *value)
	Set an option of the given filter to the provided key-value pair. More...
static CIFilter *	create_filter (CoreImageContext *ctx, const char *filter_name, AVDictionary *filter_options)
	Create a filter object by a given name and set all options to defaults. More...
static av_cold int	init (AVFilterContext *fctx)
static av_cold int	init_src (AVFilterContext *fctx)
static av_cold void	uninit (AVFilterContext *fctx)
	AVFILTER_DEFINE_CLASS (coreimage)
	AVFILTER_DEFINE_CLASS (coreimagesrc)

Variables
static const AVFilterPad	vf_coreimage_inputs []
static const AVFilterPad	vf_coreimage_outputs []
static const AVFilterPad	vsrc_coreimagesrc_outputs []
static const AVOption	coreimage_options []
AVFilter	ff_vf_coreimage
static const AVOption	coreimagesrc_options []
AVFilter	ff_vsrc_coreimagesrc

Detailed Description

Video processing based on Apple's CoreImage API.

Definition in file vf_coreimage.m.

Macro Definition Documentation

#define CLAMP_WARNING

Value:

do {     \
av_log(ctx, AV_LOG_WARNING, "Value of \"%f\" for option \"%s\" is out of range [%f %f], clamping to \"%f\".\n", \
       input,                  \
       [input_key UTF8String], \
       min_value.floatValue,   \
       max_value.floatValue,   \
       used_value.floatValue); \
} while(0)

Referenced by set_option().

#define SafeCFRelease

(

ptr

)

Value:

do { \
    if (ptr) {                  \
        CFRelease(ptr);         \
        ptr = NULL;             \
    }                           \
} while (0)

Referenced by uninit().

#define OFFSET

(

x

)

offsetof(CoreImageContext, x)

Definition at line 630 of file vf_coreimage.m.

#define FLAGS   AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM

Definition at line 631 of file vf_coreimage.m.

#define GENERATOR_OPTIONS

Value:

{"size",     "set video size",                OFFSET(w),          AV_OPT_TYPE_IMAGE_SIZE, {.str = "320x240"}, 0, 0,         FLAGS}, \
    {"s",        "set video size",                OFFSET(w),          AV_OPT_TYPE_IMAGE_SIZE, {.str = "320x240"}, 0, 0,         FLAGS}, \
    {"rate",     "set video rate",                OFFSET(frame_rate), AV_OPT_TYPE_VIDEO_RATE, {.str = "25"},      0, INT_MAX,         FLAGS}, \
    {"r",        "set video rate",                OFFSET(frame_rate), AV_OPT_TYPE_VIDEO_RATE, {.str = "25"},      0, INT_MAX,         FLAGS}, \
    {"duration", "set video duration",            OFFSET(duration),   AV_OPT_TYPE_DURATION,   {.i64 = -1},       -1, INT64_MAX, FLAGS}, \
    {"d",        "set video duration",            OFFSET(duration),   AV_OPT_TYPE_DURATION,   {.i64 = -1},       -1, INT64_MAX, FLAGS}, \
    {"sar",      "set video sample aspect ratio", OFFSET(sar),        AV_OPT_TYPE_RATIONAL,   {.dbl = 1},         0, INT_MAX,   FLAGS},

Definition at line 633 of file vf_coreimage.m.

#define FILTER_OPTIONS

Value:

{"list_filters",    "list available filters",                OFFSET(list_filters),    AV_OPT_TYPE_BOOL,   {.i64 = 0}, 0, 1, .flags = FLAGS}, \
    {"list_generators", "list available generators",             OFFSET(list_generators), AV_OPT_TYPE_BOOL,   {.i64 = 0}, 0, 1, .flags = FLAGS}, \
    {"filter",          "names and options of filters to apply", OFFSET(filter_string),   AV_OPT_TYPE_STRING, {.str = NULL},    .flags = FLAGS}, \
    {"output_rect",     "output rectangle within output image",  OFFSET(output_rect),     AV_OPT_TYPE_STRING, {.str = NULL},    .flags = FLAGS},

Definition at line 642 of file vf_coreimage.m.

Function Documentation

static int config_output ( AVFilterLink *  link )

static

Definition at line 65 of file vf_coreimage.m.

static int config_input ( AVFilterLink *  link )

static

Determine image properties from input link of filter chain.

Definition at line 83 of file vf_coreimage.m.

static void list_filters ( CoreImageContext *  ctx )

static

Print a list of all available filters including options and respective value ranges and defaults.

Definition at line 94 of file vf_coreimage.m.

Referenced by init().

static int query_formats ( AVFilterContext *  fctx )

static

Definition at line 138 of file vf_coreimage.m.

static int query_formats_src ( AVFilterContext *  fctx )

static

Definition at line 160 of file vf_coreimage.m.

static int apply_filter ( CoreImageContext *  ctx, AVFilterLink *  link, AVFrame *  frame  )

static

Definition at line 181 of file vf_coreimage.m.

Referenced by filter_frame(), and request_frame().

static int filter_frame ( AVFilterLink *  link, AVFrame *  frame  )

static

Apply all valid filters successively to the input image.

The final output image is copied from the GPU by "drawing" using a bitmap context.

Definition at line 318 of file vf_coreimage.m.

static int request_frame ( AVFilterLink *  link )

static

Definition at line 323 of file vf_coreimage.m.

static void set_option ( CoreImageContext *  ctx, CIFilter *  filter, const char *  key, const char *  value  )

static

Set an option of the given filter to the provided key-value pair.

Definition at line 358 of file vf_coreimage.m.

Referenced by create_filter().

static CIFilter* create_filter ( CoreImageContext *  ctx, const char *  filter_name, AVDictionary *  filter_options  )

static

Create a filter object by a given name and set all options to defaults.

Overwrite any option given by the user to the provided value in filter_options.

Definition at line 451 of file vf_coreimage.m.

Referenced by init().

static av_cold int init ( AVFilterContext *  fctx )

static

Definition at line 470 of file vf_coreimage.m.

Referenced by init_src().

static av_cold int init_src ( AVFilterContext *  fctx )

static

Definition at line 565 of file vf_coreimage.m.

static av_cold void uninit ( AVFilterContext *  fctx )

static

Definition at line 576 of file vf_coreimage.m.

AVFILTER_DEFINE_CLASS

(

coreimage

)

AVFILTER_DEFINE_CLASS

(

coreimagesrc

)

Variable Documentation

const AVFilterPad vf_coreimage_inputs[]

static

Initial value:

= {
    {
        .name         = "default",
        .type         = AVMEDIA_TYPE_VIDEO,
        .filter_frame = filter_frame,
        .config_props = config_input,
    },
    { NULL }
}

Definition at line 602 of file vf_coreimage.m.

const AVFilterPad vf_coreimage_outputs[]

static

Initial value:

= {
    {
        .name = "default",
        .type = AVMEDIA_TYPE_VIDEO,
    },
    { NULL }
}

Definition at line 612 of file vf_coreimage.m.

const AVFilterPad vsrc_coreimagesrc_outputs[]

static

Initial value:

= {
    {
        .name          = "default",
        .type          = AVMEDIA_TYPE_VIDEO,
        .request_frame = request_frame,
        .config_props  = config_output,
    },
    { NULL }
}

Definition at line 620 of file vf_coreimage.m.

const AVOption coreimage_options[]

static

Initial value:

= {
    FILTER_OPTIONS
    { NULL }
}

Definition at line 650 of file vf_coreimage.m.

AVFilter ff_vf_coreimage

Initial value:

= {
    .name          = "coreimage",
    .description   = NULL_IF_CONFIG_SMALL("Video filtering using CoreImage API."),
    .init          = init,
    .uninit        = uninit,
    .priv_size     = sizeof(CoreImageContext),
    .priv_class    = &coreimage_class,
    .inputs        = vf_coreimage_inputs,
    .outputs       = vf_coreimage_outputs,
    .query_formats = query_formats,
}

Definition at line 657 of file vf_coreimage.m.

const AVOption coreimagesrc_options[]

static

Initial value:

= {
    GENERATOR_OPTIONS
    FILTER_OPTIONS
    { NULL }
}

Definition at line 670 of file vf_coreimage.m.

AVFilter ff_vsrc_coreimagesrc

Initial value:

= {
    .name          = "coreimagesrc",
    .description   = NULL_IF_CONFIG_SMALL("Video source using image generators of CoreImage API."),
    .init          = init_src,
    .uninit        = uninit,
    .priv_size     = sizeof(CoreImageContext),
    .priv_class    = &coreimagesrc_class,
    .inputs        = NULL,
    .outputs       = vsrc_coreimagesrc_outputs,
    .query_formats = query_formats_src,
}

Definition at line 678 of file vf_coreimage.m.