swscale.c File Reference

#include <stdint.h>
#include <stdio.h>
#include <string.h>
#include "libavutil/avassert.h"
#include "libavutil/bswap.h"
#include "libavutil/common.h"
#include "libavutil/cpu.h"
#include "libavutil/emms.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/mem.h"
#include "libavutil/mem_internal.h"
#include "libavutil/pixdesc.h"
#include "libavutil/hwcontext.h"
#include "config.h"
#include "swscale_internal.h"
#include "swscale.h"

Go to the source code of this file.

Macros
#define	DEBUG_SWSCALE_BUFFERS   0
#define	DEBUG_BUFFERS(...)
#define	VALIDATE(field, min, max)

Functions
static av_always_inline void	fillPlane (uint8_t *plane, int stride, int width, int height, int y, uint8_t val)
static void	hScale16To19_c (SwsInternal *c, int16_t *_dst, int dstW, const uint8_t *_src, const int16_t *filter, const int32_t *filterPos, int filterSize)
static void	hScale16To15_c (SwsInternal *c, int16_t *dst, int dstW, const uint8_t *_src, const int16_t *filter, const int32_t *filterPos, int filterSize)
static void	hScale8To15_c (SwsInternal *c, int16_t *dst, int dstW, const uint8_t *src, const int16_t *filter, const int32_t *filterPos, int filterSize)
static void	hScale8To19_c (SwsInternal *c, int16_t *_dst, int dstW, const uint8_t *src, const int16_t *filter, const int32_t *filterPos, int filterSize)
static void	chrRangeToJpeg_c (int16_t *dstU, int16_t *dstV, int width, uint32_t _coeff, int64_t _offset)
static void	chrRangeFromJpeg_c (int16_t *dstU, int16_t *dstV, int width, uint32_t _coeff, int64_t _offset)
static void	lumRangeToJpeg_c (int16_t *dst, int width, uint32_t _coeff, int64_t _offset)
static void	lumRangeFromJpeg_c (int16_t *dst, int width, uint32_t _coeff, int64_t _offset)
static void	chrRangeToJpeg16_c (int16_t *_dstU, int16_t *_dstV, int width, uint32_t coeff, int64_t offset)
static void	chrRangeFromJpeg16_c (int16_t *_dstU, int16_t *_dstV, int width, uint32_t coeff, int64_t offset)
static void	lumRangeToJpeg16_c (int16_t *_dst, int width, uint32_t coeff, int64_t offset)
static void	lumRangeFromJpeg16_c (int16_t *_dst, int width, uint32_t coeff, int64_t offset)
int	ff_swscale (SwsInternal *c, const uint8_t *const src[], const int srcStride[], int srcSliceY, int srcSliceH, uint8_t *const dst[], const int dstStride[], int dstSliceY, int dstSliceH)
static void	solve_range_convert (uint16_t src_min, uint16_t src_max, uint16_t dst_min, uint16_t dst_max, int src_bits, int src_shift, int mult_shift, uint32_t *coeff, int64_t *offset)
static void	init_range_convert_constants (SwsInternal *c)
av_cold void	ff_sws_init_range_convert (SwsInternal *c)
static av_cold void	sws_init_swscale (SwsInternal *c)
void	ff_sws_init_scale (SwsInternal *c)
static void	reset_ptr (const uint8_t *src[], enum AVPixelFormat format)
static int	check_image_pointers (const uint8_t *const data[4], enum AVPixelFormat pix_fmt, const int linesizes[4])
static void	xyz12Torgb48_c (const SwsInternal *c, uint8_t *dst, int dst_stride, const uint8_t *src, int src_stride, int w, int h)
static void	rgb48Toxyz12_c (const SwsInternal *c, uint8_t *dst, int dst_stride, const uint8_t *src, int src_stride, int w, int h)
av_cold void	ff_sws_init_xyzdsp (SwsInternal *c)
void	ff_update_palette (SwsInternal *c, const uint32_t *pal)
static int	scale_internal (SwsContext *sws, const uint8_t *const srcSlice[], const int srcStride[], int srcSliceY, int srcSliceH, uint8_t *const dstSlice[], const int dstStride[], int dstSliceY, int dstSliceH)
static int	scale_gamma (SwsInternal *c, const uint8_t *const srcSlice[], const int srcStride[], int srcSliceY, int srcSliceH, uint8_t *const dstSlice[], const int dstStride[], int dstSliceY, int dstSliceH)
static int	scale_cascaded (SwsInternal *c, const uint8_t *const srcSlice[], const int srcStride[], int srcSliceY, int srcSliceH, uint8_t *const dstSlice[], const int dstStride[], int dstSliceY, int dstSliceH)
void	sws_frame_end (SwsContext *sws)
	Finish the scaling process for a pair of source/destination frames previously submitted with sws_frame_start().
static int	ptr_in_buf (const uint8_t *ptr, const AVBufferRef *buf)
static int	frame_ref (AVFrame *dst, const AVFrame *src, const int plane_copy[4])
static int	frame_alloc_buffers (SwsContext *sws, AVFrame *frame)
int	sws_frame_start (SwsContext *sws, AVFrame *dst, const AVFrame *src)
	Initialize the scaling process for a given pair of source/destination frames.
int	sws_send_slice (SwsContext *sws, unsigned int slice_start, unsigned int slice_height)
	Indicate that a horizontal slice of input data is available in the source frame previously provided to sws_frame_start().
unsigned int	sws_receive_slice_alignment (const SwsContext *sws)
	Get the alignment required for slices.
int	sws_receive_slice (SwsContext *sws, unsigned int slice_start, unsigned int slice_height)
	Request a horizontal slice of the output data to be written into the frame previously provided to sws_frame_start().
int	sws_scale_frame (SwsContext *sws, AVFrame *dst, const AVFrame *src)
	Scale source data from src and write the output to dst.
static int	validate_params (SwsContext *ctx)
int	sws_frame_setup (SwsContext *ctx, const AVFrame *dst, const AVFrame *src)
	Like sws_scale_frame, but without actually scaling.
int attribute_align_arg	sws_scale (SwsContext *sws, const uint8_t *const srcSlice[], const int srcStride[], int srcSliceY, int srcSliceH, uint8_t *const dst[], const int dstStride[])
	swscale wrapper, so we don't need to export the SwsContext.
int	ff_sws_slice_worker (void *priv, int jobnr, int threadnr, int nb_jobs, int nb_threads)

Variables
const uint8_t	ff_dither_8x8_128 [9][8]
static const uint8_t	sws_pb_64 [8]

Macro Definition Documentation

DEBUG_SWSCALE_BUFFERS

#define DEBUG_SWSCALE_BUFFERS   0

Definition at line 258 of file swscale.c.

DEBUG_BUFFERS

#define DEBUG_BUFFERS

(

...

)

Value:

    if (DEBUG_SWSCALE_BUFFERS)                  \
        av_log(c, AV_LOG_DEBUG, __VA_ARGS__)

Definition at line 259 of file swscale.c.

Referenced by ff_swscale().

VALIDATE

#define VALIDATE	(		field,
			min,
			max )

Value:

    if (ctx->field < min || ctx->field > max) { \
        av_log(ctx, AV_LOG_ERROR, "'%s' (%d) out of range [%d, %d]\n", \
               #field, (int) ctx->field, min, max); \
        return AVERROR(EINVAL); \
    }

Referenced by validate_params().

Function Documentation

fillPlane()

static av_always_inline void fillPlane ( uint8_t * plane, int stride, int width, int height, int y, uint8_t val )

static

Definition at line 58 of file swscale.c.

Referenced by ff_swscale().

hScale16To19_c()

static void hScale16To19_c ( SwsInternal * c, int16_t * _dst, int dstW, const uint8_t * _src, const int16_t * filter, const int32_t * filterPos, int filterSize )

static

Definition at line 69 of file swscale.c.

Referenced by sws_init_swscale().

hScale16To15_c()

static void hScale16To15_c ( SwsInternal * c, int16_t * dst, int dstW, const uint8_t * _src, const int16_t * filter, const int32_t * filterPos, int filterSize )

static

Definition at line 99 of file swscale.c.

Referenced by sws_init_swscale().

hScale8To15_c()

static void hScale8To15_c ( SwsInternal * c, int16_t * dst, int dstW, const uint8_t * src, const int16_t * filter, const int32_t * filterPos, int filterSize )

static

Definition at line 128 of file swscale.c.

Referenced by sws_init_swscale().

hScale8To19_c()

static void hScale8To19_c ( SwsInternal * c, int16_t * _dst, int dstW, const uint8_t * src, const int16_t * filter, const int32_t * filterPos, int filterSize )

static

Definition at line 144 of file swscale.c.

Referenced by sws_init_swscale().

chrRangeToJpeg_c()

static void chrRangeToJpeg_c ( int16_t * dstU, int16_t * dstV, int width, uint32_t _coeff, int64_t _offset )

static

Definition at line 163 of file swscale.c.

Referenced by ff_sws_init_range_convert().

chrRangeFromJpeg_c()

static void chrRangeFromJpeg_c ( int16_t * dstU, int16_t * dstV, int width, uint32_t _coeff, int64_t _offset )

static

Definition at line 177 of file swscale.c.

Referenced by ff_sws_init_range_convert().

lumRangeToJpeg_c()

static void lumRangeToJpeg_c ( int16_t * dst, int width, uint32_t _coeff, int64_t _offset )

static

Definition at line 189 of file swscale.c.

Referenced by ff_sws_init_range_convert().

lumRangeFromJpeg_c()

static void lumRangeFromJpeg_c ( int16_t * dst, int width, uint32_t _coeff, int64_t _offset )

static

Definition at line 201 of file swscale.c.

Referenced by ff_sws_init_range_convert().

chrRangeToJpeg16_c()

static void chrRangeToJpeg16_c ( int16_t * _dstU, int16_t * _dstV, int width, uint32_t coeff, int64_t offset )

static

Definition at line 211 of file swscale.c.

Referenced by ff_sws_init_range_convert().

chrRangeFromJpeg16_c()

static void chrRangeFromJpeg16_c ( int16_t * _dstU, int16_t * _dstV, int width, uint32_t coeff, int64_t offset )

static

Definition at line 225 of file swscale.c.

Referenced by ff_sws_init_range_convert().

lumRangeToJpeg16_c()

static void lumRangeToJpeg16_c ( int16_t * _dst, int width, uint32_t coeff, int64_t offset )

static

Definition at line 237 of file swscale.c.

Referenced by ff_sws_init_range_convert().

lumRangeFromJpeg16_c()

static void lumRangeFromJpeg16_c ( int16_t * _dst, int width, uint32_t coeff, int64_t offset )

static

Definition at line 248 of file swscale.c.

Referenced by ff_sws_init_range_convert().

ff_swscale()

int ff_swscale	(	SwsInternal *	c,
		const uint8_t *const	src[],
		const int	srcStride[],
		int	srcSliceY,
		int	srcSliceH,
		uint8_t *const	dst[],
		const int	dstStride[],
		int	dstSliceY,
		int	dstSliceH )

Definition at line 263 of file swscale.c.

Referenced by run_legacy_swscale(), and scale_internal().

solve_range_convert()

static void solve_range_convert ( uint16_t src_min, uint16_t src_max, uint16_t dst_min, uint16_t dst_max, int src_bits, int src_shift, int mult_shift, uint32_t * coeff, int64_t * offset )

static

Definition at line 577 of file swscale.c.

Referenced by init_range_convert_constants().

init_range_convert_constants()

static void init_range_convert_constants ( SwsInternal * c )

static

Definition at line 591 of file swscale.c.

Referenced by ff_sws_init_range_convert().

ff_sws_init_range_convert()

av_cold void ff_sws_init_range_convert

(

SwsInternal *

c

)

Definition at line 626 of file swscale.c.

Referenced by sws_init_swscale(), and sws_setColorspaceDetails().

sws_init_swscale()

static av_cold void sws_init_swscale ( SwsInternal * c )

static

Definition at line 662 of file swscale.c.

Referenced by ff_sws_init_scale().

ff_sws_init_scale()

void ff_sws_init_scale

(

SwsInternal *

c

)

Definition at line 697 of file swscale.c.

Referenced by check_chrConvertRange(), check_hscale(), check_input_planar_rgb_to_a(), check_input_planar_rgb_to_uv(), check_input_planar_rgb_to_y(), check_lumConvertRange(), check_output_yuv2gbrp(), check_rgb_to_uv(), check_rgb_to_y(), check_rgba_to_a(), check_yuv2nv12cX(), check_yuv2yuv1(), check_yuv2yuvX(), and ff_sws_init_single_context().

reset_ptr()

static void reset_ptr ( const uint8_t * src[], enum AVPixelFormat format )

static

Definition at line 716 of file swscale.c.

Referenced by scale_internal().

check_image_pointers()

static int check_image_pointers ( const uint8_t *const data[4], enum AVPixelFormat pix_fmt, const int linesizes[4] )

static

Definition at line 728 of file swscale.c.

Referenced by scale_internal().

xyz12Torgb48_c()

static void xyz12Torgb48_c ( const SwsInternal * c, uint8_t * dst, int dst_stride, const uint8_t * src, int src_stride, int w, int h )

static

Definition at line 745 of file swscale.c.

Referenced by ff_sws_init_xyzdsp().

rgb48Toxyz12_c()

static void rgb48Toxyz12_c ( const SwsInternal * c, uint8_t * dst, int dst_stride, const uint8_t * src, int src_stride, int w, int h )

static

Definition at line 804 of file swscale.c.

Referenced by ff_sws_init_xyzdsp().

ff_sws_init_xyzdsp()

av_cold void ff_sws_init_xyzdsp

(

SwsInternal *

c

)

Definition at line 863 of file swscale.c.

Referenced by check_xyz12Torgb48le(), ff_get_unscaled_swscale(), and sws_init_swscale().

ff_update_palette()

void ff_update_palette	(	SwsInternal *	c,
		const uint32_t *	pal )

Definition at line 873 of file swscale.c.

Referenced by scale_internal(), and setup_legacy_swscale().

scale_internal()

static int scale_internal ( SwsContext * sws, const uint8_t *const srcSlice[], const int srcStride[], int srcSliceY, int srcSliceH, uint8_t *const dstSlice[], const int dstStride[], int dstSliceY, int dstSliceH )

static

Definition at line 1022 of file swscale.c.

Referenced by ff_sws_slice_worker(), scale_cascaded(), scale_gamma(), sws_receive_slice(), and sws_scale().

scale_gamma()

static int scale_gamma ( SwsInternal * c, const uint8_t *const srcSlice[], const int srcStride[], int srcSliceY, int srcSliceH, uint8_t *const dstSlice[], const int dstStride[], int dstSliceY, int dstSliceH )

static

Definition at line 959 of file swscale.c.

Referenced by scale_internal().

scale_cascaded()

static int scale_cascaded ( SwsInternal * c, const uint8_t *const srcSlice[], const int srcStride[], int srcSliceY, int srcSliceH, uint8_t *const dstSlice[], const int dstStride[], int dstSliceY, int dstSliceH )

static

Definition at line 993 of file swscale.c.

Referenced by scale_internal().

ptr_in_buf()

static int ptr_in_buf ( const uint8_t * ptr, const AVBufferRef * buf )

static

Definition at line 1229 of file swscale.c.

Referenced by frame_ref().

frame_ref()

static int frame_ref ( AVFrame * dst, const AVFrame * src, const int plane_copy[4] )

static

Definition at line 1237 of file swscale.c.

Referenced by amf_release_attached_frame_ref(), amf_store_attached_frame_ref(), sws_scale_frame(), and vp56_render_mb().

frame_alloc_buffers()

static int frame_alloc_buffers ( SwsContext * sws, AVFrame * frame )

static

Definition at line 1273 of file swscale.c.

Referenced by sws_scale_frame().

validate_params()

static int validate_params ( SwsContext * ctx )

static

Definition at line 1482 of file swscale.c.

Referenced by sws_frame_setup().

ff_sws_slice_worker()

int ff_sws_slice_worker	(	void *	priv,
		int	jobnr,
		int	threadnr,
		int	nb_jobs,
		int	nb_threads )

Definition at line 1645 of file swscale.c.

Referenced by context_init_threaded().

Variable Documentation

ff_dither_8x8_128

const uint8_t ff_dither_8x8_128[9][8]

Initial value:

= {
    {  36, 68,  60, 92,  34, 66,  58, 90, },
    { 100,  4, 124, 28,  98,  2, 122, 26, },
    {  52, 84,  44, 76,  50, 82,  42, 74, },
    { 116, 20, 108, 12, 114, 18, 106, 10, },
    {  32, 64,  56, 88,  38, 70,  62, 94, },
    {  96,  0, 120, 24, 102,  6, 126, 30, },
    {  48, 80,  40, 72,  54, 86,  46, 78, },
    { 112, 16, 104,  8, 118, 22, 110, 14, },
    {  36, 68,  60, 92,  34, 66,  58, 90, },
}

Definition at line 42 of file swscale.c.

Referenced by ff_swscale().

sws_pb_64

const uint8_t sws_pb_64[8]

static

Initial value:

= {
    64, 64, 64, 64, 64, 64, 64, 64
}

Definition at line 54 of file swscale.c.

Referenced by ff_swscale().