fflcms2.c File Reference

#include "libavutil/csp.h"
#include "fflcms2.h"

Go to the source code of this file.

Functions
static void	log_cb (cmsContext ctx, cmsUInt32Number error, const char *str)
int	ff_icc_context_init (FFIccContext *s, void *avctx)
	Initializes an FFIccContext. More...
void	ff_icc_context_uninit (FFIccContext *s)
static int	get_curve (FFIccContext *s, enum AVColorTransferCharacteristic trc, cmsToneCurve **out_curve)
int	ff_icc_profile_generate (FFIccContext *s, enum AVColorPrimaries color_prim, enum AVColorTransferCharacteristic color_trc, cmsHPROFILE *out_profile)
	Generate an ICC profile for a given combination of color primaries and transfer function. More...
int	ff_icc_profile_attach (FFIccContext *s, cmsHPROFILE profile, AVFrame *frame)
	Attach an ICC profile to a frame. More...
static av_always_inline void	XYZ_xy (cmsCIEXYZ XYZ, AVCIExy *xy)
static av_always_inline AVRational	abs_sub_q (AVRational r1, AVRational r2)
int	ff_icc_profile_sanitize (FFIccContext *s, cmsHPROFILE profile)
	Sanitize an ICC profile to try and fix badly broken values. More...
int	ff_icc_profile_read_primaries (FFIccContext *s, cmsHPROFILE profile, AVColorPrimariesDesc *out_primaries)
	Read the color primaries and white point coefficients encoded by an ICC profile, and return the raw values in out_primaries. More...
int	ff_icc_profile_detect_transfer (FFIccContext *s, cmsHPROFILE profile, enum AVColorTransferCharacteristic *out_trc)
	Attempt detecting the transfer characteristic that best approximates the transfer function encoded by an ICC profile. More...

Variables
static const AVCIExy	wp_d50 = { {3457, 10000}, {3585, 10000} }

Function Documentation

log_cb()

static void log_cb ( cmsContext  ctx, cmsUInt32Number  error, const char *  str  )

static

Definition at line 24 of file fflcms2.c.

Referenced by ff_icc_context_init(), and libplacebo_init().

ff_icc_context_init()

int ff_icc_context_init	(	FFIccContext *	s,
		void *	avctx
	)

Initializes an FFIccContext.

This must be done prior to using it.

Returns 0 on success, or a negative error code.

Definition at line 30 of file fflcms2.c.

Referenced by iccdetect_init(), and iccgen_init().

ff_icc_context_uninit()

void ff_icc_context_uninit

(

FFIccContext *

s

)

Definition at line 42 of file fflcms2.c.

Referenced by ff_codec_close(), iccdetect_uninit(), and iccgen_uninit().

get_curve()

static int get_curve ( FFIccContext *  s, enum AVColorTransferCharacteristic  trc, cmsToneCurve **  out_curve  )

static

Definition at line 50 of file fflcms2.c.

Referenced by ff_icc_profile_detect_transfer(), and ff_icc_profile_generate().

ff_icc_profile_generate()

int ff_icc_profile_generate	(	FFIccContext *	s,
		enum AVColorPrimaries	color_prim,
		enum AVColorTransferCharacteristic	color_trc,
		cmsHPROFILE *	out_profile
	)

Generate an ICC profile for a given combination of color primaries and transfer function.

Both values must be set to valid entries (not "undefined") for this function to work.

Returns 0 on success, or a negative error code.

Definition at line 145 of file fflcms2.c.

Referenced by iccgen_filter_frame().

ff_icc_profile_attach()

int ff_icc_profile_attach	(	FFIccContext *	s,
		cmsHPROFILE	profile,
		AVFrame *	frame
	)

Attach an ICC profile to a frame.

Helper wrapper around cmsSaveProfileToMem and av_frame_new_side_data_from_buf.

Returns 0 on success, or a negative error code.

Definition at line 172 of file fflcms2.c.

Referenced by iccgen_filter_frame().

XYZ_xy()

static av_always_inline void XYZ_xy ( cmsCIEXYZ  XYZ, AVCIExy *  xy  )

static

Definition at line 197 of file fflcms2.c.

Referenced by ff_icc_profile_read_primaries(), and ff_icc_profile_sanitize().

abs_sub_q()

static av_always_inline AVRational abs_sub_q ( AVRational  r1, AVRational  r2  )

static

Definition at line 204 of file fflcms2.c.

Referenced by ff_icc_profile_sanitize().

ff_icc_profile_sanitize()

int ff_icc_profile_sanitize	(	FFIccContext *	s,
		cmsHPROFILE	profile
	)

Sanitize an ICC profile to try and fix badly broken values.

Returns 0 on success, or a negative error code.

Definition at line 213 of file fflcms2.c.

Referenced by iccdetect_filter_frame().

ff_icc_profile_read_primaries()

int ff_icc_profile_read_primaries	(	FFIccContext *	s,
		cmsHPROFILE	profile,
		AVColorPrimariesDesc *	out_primaries
	)

Read the color primaries and white point coefficients encoded by an ICC profile, and return the raw values in out_primaries.

Returns 0 on success, or a negative error code.

Definition at line 255 of file fflcms2.c.

Referenced by iccdetect_filter_frame().

ff_icc_profile_detect_transfer()

int ff_icc_profile_detect_transfer	(	FFIccContext *	s,
		cmsHPROFILE	profile,
		enum AVColorTransferCharacteristic *	out_trc
	)

Attempt detecting the transfer characteristic that best approximates the transfer function encoded by an ICC profile.

Sets out_trc to AVCOL_TRC_UNSPECIFIED if no clear match can be identified.

Returns 0 on success (including no match), or a negative error code.

Definition at line 302 of file fflcms2.c.

Referenced by iccdetect_filter_frame().

Variable Documentation

wp_d50

const AVCIExy wp_d50 = { {3457, 10000}, {3585, 10000} }

static

Definition at line 211 of file fflcms2.c.

Referenced by ff_icc_profile_sanitize().