swscale.c File Reference

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <inttypes.h>
#include <stdarg.h>
#include <signal.h>
#include "libavutil/cpu.h"
#include "libavutil/avstring.h"
#include "libavutil/parseutils.h"
#include "libavutil/pixdesc.h"
#include "libavutil/lfg.h"
#include "libavutil/sfc64.h"
#include "libavutil/frame.h"
#include "libavutil/opt.h"
#include "libavutil/time.h"
#include "libavutil/pixfmt.h"
#include "libavutil/avassert.h"
#include "libavutil/macros.h"
#include "libavutil/hwcontext.h"
#include "libswscale/swscale.h"
#include "libswscale/format.h"

Go to the source code of this file.

Data Structures
struct	options
struct	mode
struct	test_results

Macros
#define	IMPL_NEW   0
#define	IMPL_LEGACY   1

Functions
static const char *	speedup_color (double ratio)
static void	exit_handler (int sig)
static float	estimate_quantization_noise (enum AVPixelFormat fmt)
static int	fmt_comps (enum AVPixelFormat fmt)
static void	get_ssim (float ssim[4], const AVFrame *out, const AVFrame *ref, int comps)
static float	get_loss (const float ssim[4])
static void	unref_buffers (AVFrame *frame)
static int	checked_sws_scale_frame (SwsContext *c, AVFrame *dst, const AVFrame *src)
static int	scale_new (AVFrame *dst, const AVFrame *src, const struct mode *mode, const struct options *opts, int64_t *out_time)
static int	scale_legacy (AVFrame *dst, const AVFrame *src, const struct mode *mode, const struct options *opts, int64_t *out_time)
static int	scale_hw (AVFrame *dst, const AVFrame *src, const struct mode *mode, const struct options *opts, int64_t *out_time)
static void	print_test_params (char *buf, size_t buf_size, const AVFrame *src, const AVFrame *dst, const struct mode *mode, const struct options *opts)
static void	print_results (const AVFrame *ref, const AVFrame *src, const AVFrame *dst, int dst_w, int dst_h, const struct mode *mode, const struct options *opts, const struct test_results *r, const struct test_results *ref_r, float expected_loss)
static int	init_frame (AVFrame **pframe, const AVFrame *ref, int width, int height, enum AVPixelFormat format)
static int	run_test (enum AVPixelFormat src_fmt, enum AVPixelFormat dst_fmt, int dst_w, int dst_h, const struct mode *mode, const struct options *opts, const AVFrame *ref, AVFrame **psrc, const struct test_results *ref_r)
static int	fmt_is_subsampled (enum AVPixelFormat fmt)
static int	fmt_is_supported_by_hw (enum AVPixelFormat fmt)
static int	fmt_disabled (const struct options *opts, enum AVPixelFormat fmt)
static int	test_formats (const struct options *opts, enum AVPixelFormat src, enum AVPixelFormat dst)
static int	run_self_tests (const AVFrame *ref, const struct options *opts)
static int	run_file_tests (const AVFrame *ref, FILE *fp, const struct options *opts)
static int	init_ref (AVFrame *ref, const struct options *opts)
static int	parse_size (struct options *opts, const char *str, char **pbuf)
static int	parse_implementation (const char *str)
static int	parse_options (int argc, char **argv, struct options *opts, FILE **fp)
int	main (int argc, char **argv)

Variables
const SwsFlags	flags []
static FFSFC64	prng_state
static SwsContext *	sws_ref_src
static SwsContext *	sws_src_dst
static SwsContext *	sws_dst_out
static AVBufferRef *	hw_device_ctx = NULL
static AVHWFramesConstraints *	hw_device_constr = NULL
static double	speedup_logavg
static double	speedup_min = 1e10
static double	speedup_max = 0
static int	speedup_count

Macro Definition Documentation

IMPL_NEW

#define IMPL_NEW   0

Definition at line 47 of file swscale.c.

IMPL_LEGACY

#define IMPL_LEGACY   1

Definition at line 48 of file swscale.c.

Function Documentation

speedup_color()

static const char* speedup_color ( double  ratio )

static

Definition at line 111 of file swscale.c.

Referenced by exit_handler(), and print_results().

exit_handler()

static void exit_handler ( int  sig )

static

Definition at line 122 of file swscale.c.

Referenced by main().

estimate_quantization_noise()

static float estimate_quantization_noise ( enum AVPixelFormat  fmt )

static

Definition at line 135 of file swscale.c.

Referenced by run_test().

fmt_comps()

static int fmt_comps ( enum AVPixelFormat  fmt )

static

Definition at line 157 of file swscale.c.

Referenced by run_test().

get_ssim()

static void get_ssim ( float  ssim[4], const AVFrame *  out, const AVFrame *  ref, int  comps  )

static

Definition at line 166 of file swscale.c.

Referenced by run_test().

get_loss()

static float get_loss ( const float  ssim[4] )

static

Definition at line 214 of file swscale.c.

Referenced by run_test().

unref_buffers()

static void unref_buffers ( AVFrame *  frame )

static

Definition at line 226 of file swscale.c.

Referenced by scale_new().

checked_sws_scale_frame()

static int checked_sws_scale_frame ( SwsContext *  c, AVFrame *  dst, const AVFrame *  src  )

static

Definition at line 238 of file swscale.c.

Referenced by init_ref(), run_test(), scale_hw(), scale_legacy(), and scale_new().

scale_new()

static int scale_new ( AVFrame *  dst, const AVFrame *  src, const struct mode *  mode, const struct options *  opts, int64_t *  out_time  )

static

Definition at line 248 of file swscale.c.

Referenced by run_test().

scale_legacy()

static int scale_legacy ( AVFrame *  dst, const AVFrame *  src, const struct mode *  mode, const struct options *  opts, int64_t *  out_time  )

static

Definition at line 282 of file swscale.c.

Referenced by run_test().

scale_hw()

static int scale_hw ( AVFrame *  dst, const AVFrame *  src, const struct mode *  mode, const struct options *  opts, int64_t *  out_time  )

static

Definition at line 327 of file swscale.c.

Referenced by run_test().

print_test_params()

static void print_test_params ( char *  buf, size_t  buf_size, const AVFrame *  src, const AVFrame *  dst, const struct mode *  mode, const struct options *  opts  )

static

Definition at line 453 of file swscale.c.

Referenced by print_results().

print_results()

static void print_results ( const AVFrame *  ref, const AVFrame *  src, const AVFrame *  dst, int  dst_w, int  dst_h, const struct mode *  mode, const struct options *  opts, const struct test_results *  r, const struct test_results *  ref_r, float  expected_loss  )

static

The new scaling code does not (yet) perform error diffusion for low bit depth output, which impacts the SSIM score slightly for very low bit-depth formats (e.g. monow, monob). Since this is an expected result, drop the badness from an error to a warning for such cases. This can be removed again once error diffusion is implemented in the new ops code.

Definition at line 471 of file swscale.c.

Referenced by run_test().

init_frame()

static int init_frame ( AVFrame **  pframe, const AVFrame *  ref, int  width, int  height, enum AVPixelFormat  format  )

static

Definition at line 553 of file swscale.c.

Referenced by run_test().

run_test()

static int run_test ( enum AVPixelFormat  src_fmt, enum AVPixelFormat  dst_fmt, int  dst_w, int  dst_h, const struct mode *  mode, const struct options *  opts, const AVFrame *  ref, AVFrame **  psrc, const struct test_results *  ref_r  )

static

Definition at line 568 of file swscale.c.

Referenced by run_file_tests(), and run_self_tests().

fmt_is_subsampled()

static int fmt_is_subsampled ( enum AVPixelFormat  fmt )

inlinestatic

Definition at line 671 of file swscale.c.

Referenced by fmt_disabled().

fmt_is_supported_by_hw()

static int fmt_is_supported_by_hw ( enum AVPixelFormat  fmt )

inlinestatic

Definition at line 677 of file swscale.c.

Referenced by fmt_disabled().

fmt_disabled()

static int fmt_disabled ( const struct options *  opts, enum AVPixelFormat  fmt  )

inlinestatic

Definition at line 692 of file swscale.c.

Referenced by run_self_tests().

test_formats()

static int test_formats ( const struct options *  opts, enum AVPixelFormat  src, enum AVPixelFormat  dst  )

inlinestatic

Definition at line 699 of file swscale.c.

Referenced by run_self_tests().

run_self_tests()

static int run_self_tests ( const AVFrame *  ref, const struct options *  opts  )

static

Definition at line 715 of file swscale.c.

Referenced by main().

run_file_tests()

static int run_file_tests ( const AVFrame *  ref, FILE *  fp, const struct options *  opts  )

static

Definition at line 788 of file swscale.c.

Referenced by main().

init_ref()

static int init_ref ( AVFrame *  ref, const struct options *  opts  )

static

Definition at line 861 of file swscale.c.

Referenced by main().

parse_size()

static int parse_size ( struct options *  opts, const char *  str, char **  pbuf  )

static

Definition at line 895 of file swscale.c.

Referenced by parse_options().

parse_implementation()

static int parse_implementation ( const char *  str )

static

Definition at line 919 of file swscale.c.

Referenced by parse_options().

parse_options()

static int parse_options ( int  argc, char **  argv, struct options *  opts, FILE **  fp  )

static

Definition at line 928 of file swscale.c.

Referenced by main().

main()

int main	(	int	argc,
		char **	argv
	)

Definition at line 1123 of file swscale.c.

Variable Documentation

flags

const SwsFlags flags[]

Initial value:

= {
    0, 
    SWS_FAST_BILINEAR,
    SWS_BILINEAR,
    SWS_BICUBIC,
    SWS_X | SWS_BITEXACT,
    SWS_POINT,
    SWS_AREA | SWS_ACCURATE_RND,
    SWS_BICUBIC | SWS_FULL_CHR_H_INT | SWS_FULL_CHR_H_INP,
}

Definition at line 85 of file swscale.c.

Referenced by ff_sws_init_range_convert_riscv(), ff_sws_init_swscale_riscv(), ff_swscale(), ff_updateMMXDitherTables(), parse_options(), and run_self_tests().

prng_state

FFSFC64 prng_state

static

Definition at line 96 of file swscale.c.

Referenced by main(), and run_self_tests().

sws_ref_src

SwsContext* sws_ref_src

static

Definition at line 99 of file swscale.c.

Referenced by main(), run_test(), and test_formats().

sws_src_dst

SwsContext* sws_src_dst

static

Definition at line 100 of file swscale.c.

Referenced by main(), and scale_new().

sws_dst_out

SwsContext* sws_dst_out

static

Definition at line 101 of file swscale.c.

Referenced by main(), run_test(), and test_formats().

hw_device_ctx

AVBufferRef* hw_device_ctx = NULL

static

Definition at line 103 of file swscale.c.

Referenced by main(), parse_options(), run_test(), and scale_hw().

hw_device_constr

AVHWFramesConstraints* hw_device_constr = NULL

static

Definition at line 104 of file swscale.c.

Referenced by fmt_disabled(), fmt_is_supported_by_hw(), main(), and parse_options().

speedup_logavg

double speedup_logavg

static

Definition at line 106 of file swscale.c.

Referenced by exit_handler(), and print_results().

speedup_min

double speedup_min = 1e10

static

Definition at line 107 of file swscale.c.

Referenced by exit_handler(), and print_results().

speedup_max

double speedup_max = 0

static

Definition at line 108 of file swscale.c.

Referenced by exit_handler(), and print_results().

speedup_count

int speedup_count

static

Definition at line 109 of file swscale.c.

Referenced by exit_handler(), and print_results().