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gfiber / vendor / google / swscale / refs/heads/newkernel_dev / . / swscale.c
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/*
* Copyright (C) 2001-2003 Michael Niedermayer <michaelni@gmx.at>
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
* the C code (not assembly, mmx, ...) of the swscaler which has been written
* by Michael Niedermayer can be used under the LGPL license too
*/
/*
supported Input formats: YV12, I420/IYUV, YUY2, UYVY, BGR32, BGR24, BGR16, BGR15, RGB32, RGB24, Y8/Y800, YVU9/IF09
supported output formats: YV12, I420/IYUV, YUY2, UYVY, {BGR,RGB}{1,4,8,15,16,24,32}, Y8/Y800, YVU9/IF09
{BGR,RGB}{1,4,8,15,16} support dithering
unscaled special converters (YV12=I420=IYUV, Y800=Y8)
YV12 -> {BGR,RGB}{1,4,8,15,16,24,32}
x -> x
YUV9 -> YV12
YUV9/YV12 -> Y800
Y800 -> YUV9/YV12
BGR24 -> BGR32 & RGB24 -> RGB32
BGR32 -> BGR24 & RGB32 -> RGB24
BGR15 -> BGR16
*/
/*
tested special converters (most are tested actually but i didnt write it down ...)
YV12 -> BGR16
YV12 -> YV12
BGR15 -> BGR16
BGR16 -> BGR16
YVU9 -> YV12
untested special converters
YV12/I420 -> BGR15/BGR24/BGR32 (its the yuv2rgb stuff, so it should be ok)
YV12/I420 -> YV12/I420
YUY2/BGR15/BGR24/BGR32/RGB24/RGB32 -> same format
BGR24 -> BGR32 & RGB24 -> RGB32
BGR32 -> BGR24 & RGB32 -> RGB24
BGR24 -> YV12
*/
#include <inttypes.h>
#include <string.h>
#include <math.h>
#include <stdio.h>
#include <unistd.h>
//#include "config.h"
#include <assert.h>
#ifdef HAVE_MALLOC_H
#include <malloc.h>
#else
#include <stdlib.h>
#endif
#ifdef HAVE_SYS_MMAN_H
#include <sys/mman.h>
#if defined(MAP_ANON) && !defined(MAP_ANONYMOUS)
#define MAP_ANONYMOUS MAP_ANON
#endif
#endif
#include "swscale.h"
#include "swscale_internal.h"
//#include "x86_cpu.h"
//#include "bswap.h"
//#include "rgb2rgb.h"
#ifdef USE_FASTMEMCPY
#include "libvo/fastmemcpy.h"
#endif
#undef MOVNTQ
#undef PAVGB
//#undef HAVE_MMX2
//#define HAVE_3DNOW
//#undef HAVE_MMX
//#undef ARCH_X86
//#define WORDS_BIGENDIAN
#define DITHER1XBPP
#define FAST_BGR2YV12 // use 7 bit coeffs instead of 15bit
#define RET 0xC3 //near return opcode for X86
#ifdef MP_DEBUG
#define ASSERT(x) assert(x);
#else
#define ASSERT(x) ;
#endif
#ifdef M_PI
#define PI M_PI
#else
#define PI 3.14159265358979323846
#endif
#define isSupportedIn(x) ((x)==PIX_FMT_RGB32|| (x)==PIX_FMT_BGR24|| (x)==PIX_FMT_BGR32|| (x)==PIX_FMT_RGB24)
#define isSupportedOut(x) (isRGB(x) || isBGR(x))
#define isPacked(x) (isRGB(x) || isBGR(x))
#define RGB2YUV_SHIFT 16
#define BY ((int)( 0.098*(1<<RGB2YUV_SHIFT)+0.5))
#define BV ((int)(-0.071*(1<<RGB2YUV_SHIFT)+0.5))
#define BU ((int)( 0.439*(1<<RGB2YUV_SHIFT)+0.5))
#define GY ((int)( 0.504*(1<<RGB2YUV_SHIFT)+0.5))
#define GV ((int)(-0.368*(1<<RGB2YUV_SHIFT)+0.5))
#define GU ((int)(-0.291*(1<<RGB2YUV_SHIFT)+0.5))
#define RY ((int)( 0.257*(1<<RGB2YUV_SHIFT)+0.5))
#define RV ((int)( 0.439*(1<<RGB2YUV_SHIFT)+0.5))
#define RU ((int)(-0.148*(1<<RGB2YUV_SHIFT)+0.5))
/*
NOTES
Special versions: fast Y 1:1 scaling (no interpolation in y direction)
TODO
more intelligent missalignment avoidance for the horizontal scaler
write special vertical cubic upscale version
Optimize C code (yv12 / minmax)
add support for packed pixel yuv input & output
add support for Y8 output
optimize bgr24 & bgr32
add BGR4 output support
write special BGR->BGR scaler
*/
#if defined(ARCH_X86) || defined(ARCH_X86_64)
static uint64_t attribute_used __attribute__((aligned(8))) bF8= 0xF8F8F8F8F8F8F8F8LL;
static uint64_t attribute_used __attribute__((aligned(8))) bFC= 0xFCFCFCFCFCFCFCFCLL;
static uint64_t __attribute__((aligned(8))) w10= 0x0010001000100010LL;
static uint64_t attribute_used __attribute__((aligned(8))) w02= 0x0002000200020002LL;
static uint64_t attribute_used __attribute__((aligned(8))) bm00001111=0x00000000FFFFFFFFLL;
static uint64_t attribute_used __attribute__((aligned(8))) bm00000111=0x0000000000FFFFFFLL;
static uint64_t attribute_used __attribute__((aligned(8))) bm11111000=0xFFFFFFFFFF000000LL;
static uint64_t attribute_used __attribute__((aligned(8))) bm01010101=0x00FF00FF00FF00FFLL;
static volatile uint64_t attribute_used __attribute__((aligned(8))) b5Dither;
static volatile uint64_t attribute_used __attribute__((aligned(8))) g5Dither;
static volatile uint64_t attribute_used __attribute__((aligned(8))) g6Dither;
static volatile uint64_t attribute_used __attribute__((aligned(8))) r5Dither;
static uint64_t __attribute__((aligned(8))) dither4[2]={
0x0103010301030103LL,
0x0200020002000200LL,};
static uint64_t __attribute__((aligned(8))) dither8[2]={
0x0602060206020602LL,
0x0004000400040004LL,};
static uint64_t __attribute__((aligned(8))) b16Mask= 0x001F001F001F001FLL;
static uint64_t attribute_used __attribute__((aligned(8))) g16Mask= 0x07E007E007E007E0LL;
static uint64_t attribute_used __attribute__((aligned(8))) r16Mask= 0xF800F800F800F800LL;
static uint64_t __attribute__((aligned(8))) b15Mask= 0x001F001F001F001FLL;
static uint64_t attribute_used __attribute__((aligned(8))) g15Mask= 0x03E003E003E003E0LL;
static uint64_t attribute_used __attribute__((aligned(8))) r15Mask= 0x7C007C007C007C00LL;
static uint64_t attribute_used __attribute__((aligned(8))) M24A= 0x00FF0000FF0000FFLL;
static uint64_t attribute_used __attribute__((aligned(8))) M24B= 0xFF0000FF0000FF00LL;
static uint64_t attribute_used __attribute__((aligned(8))) M24C= 0x0000FF0000FF0000LL;
#ifdef FAST_BGR2YV12
static const uint64_t bgr2YCoeff attribute_used __attribute__((aligned(8))) = 0x000000210041000DULL;
static const uint64_t bgr2UCoeff attribute_used __attribute__((aligned(8))) = 0x0000FFEEFFDC0038ULL;
static const uint64_t bgr2VCoeff attribute_used __attribute__((aligned(8))) = 0x00000038FFD2FFF8ULL;
#else
static const uint64_t bgr2YCoeff attribute_used __attribute__((aligned(8))) = 0x000020E540830C8BULL;
static const uint64_t bgr2UCoeff attribute_used __attribute__((aligned(8))) = 0x0000ED0FDAC23831ULL;
static const uint64_t bgr2VCoeff attribute_used __attribute__((aligned(8))) = 0x00003831D0E6F6EAULL;
#endif /* FAST_BGR2YV12 */
static const uint64_t bgr2YOffset attribute_used __attribute__((aligned(8))) = 0x1010101010101010ULL;
static const uint64_t bgr2UVOffset attribute_used __attribute__((aligned(8)))= 0x8080808080808080ULL;
static const uint64_t w1111 attribute_used __attribute__((aligned(8))) = 0x0001000100010001ULL;
#endif /* defined(ARCH_X86) || defined(ARCH_X86_64) */
// clipping helper table for C implementations:
static unsigned char clip_table[768];
const uint8_t __attribute__((aligned(8))) dither_2x2_4[2][8]={
{ 1, 3, 1, 3, 1, 3, 1, 3, },
{ 2, 0, 2, 0, 2, 0, 2, 0, },
};
const uint8_t __attribute__((aligned(8))) dither_2x2_8[2][8]={
{ 6, 2, 6, 2, 6, 2, 6, 2, },
{ 0, 4, 0, 4, 0, 4, 0, 4, },
};
const uint8_t __attribute__((aligned(8))) dither_8x8_32[8][8]={
{ 17, 9, 23, 15, 16, 8, 22, 14, },
{ 5, 29, 3, 27, 4, 28, 2, 26, },
{ 21, 13, 19, 11, 20, 12, 18, 10, },
{ 0, 24, 6, 30, 1, 25, 7, 31, },
{ 16, 8, 22, 14, 17, 9, 23, 15, },
{ 4, 28, 2, 26, 5, 29, 3, 27, },
{ 20, 12, 18, 10, 21, 13, 19, 11, },
{ 1, 25, 7, 31, 0, 24, 6, 30, },
};
const uint8_t __attribute__((aligned(8))) dither_8x8_73[8][8]={
{ 0, 55, 14, 68, 3, 58, 17, 72, },
{ 37, 18, 50, 32, 40, 22, 54, 35, },
{ 9, 64, 5, 59, 13, 67, 8, 63, },
{ 46, 27, 41, 23, 49, 31, 44, 26, },
{ 2, 57, 16, 71, 1, 56, 15, 70, },
{ 39, 21, 52, 34, 38, 19, 51, 33, },
{ 11, 66, 7, 62, 10, 65, 6, 60, },
{ 48, 30, 43, 25, 47, 29, 42, 24, },
};
const uint8_t __attribute__((aligned(8))) dither_8x8_220[8][8]={
{117, 62, 158, 103, 113, 58, 155, 100, },
{ 34, 199, 21, 186, 31, 196, 17, 182, },
{144, 89, 131, 76, 141, 86, 127, 72, },
{ 0, 165, 41, 206, 10, 175, 52, 217, },
{110, 55, 151, 96, 120, 65, 162, 107, },
{ 28, 193, 14, 179, 38, 203, 24, 189, },
{138, 83, 124, 69, 148, 93, 134, 79, },
{ 7, 172, 48, 213, 3, 168, 45, 210, },
};
static inline void rgb24to32(const uint8_t *src,uint8_t *dst,long src_size)
{
uint8_t *dest = dst;
const uint8_t *s = src;
const uint8_t *end;
end = s + src_size;
while(s < end)
{
#ifdef WORDS_BIGENDIAN
/* RGB24 (= R,G,B) -> RGB32 (= A,B,G,R) */
*dest++ = 0;
*dest++ = s[2];
*dest++ = s[1];
*dest++ = s[0];
s+=3;
#else
*dest++ = *s++;
*dest++ = *s++;
*dest++ = *s++;
*dest++ = 0;
#endif
}
}
static inline void rgb32to24(const uint8_t *src,uint8_t *dst,long src_size)
{
uint8_t *dest = dst;
const uint8_t *s = src;
const uint8_t *end;
end = s + src_size;
while(s < end)
{
#ifdef WORDS_BIGENDIAN
/* RGB32 (= A,B,G,R) -> RGB24 (= R,G,B) */
s++;
dest[2] = *s++;
dest[1] = *s++;
dest[0] = *s++;
dest += 3;
#else
*dest++ = *s++;
*dest++ = *s++;
*dest++ = *s++;
s++;
#endif
}
}
static inline void rgb24tobgr24(const uint8_t *src, uint8_t *dst, long src_size)
{
unsigned i;
for(i=0; i<src_size; i+=3)
{
register uint8_t x;
x = src[i + 2];
dst[i + 1] = src[i + 1];
dst[i + 2] = src[i + 0];
dst[i + 0] = x;
}
}
static inline void rgb32tobgr32(const uint8_t *src, uint8_t *dst, long src_size)
{
unsigned i;
unsigned num_pixels = src_size >> 2;
for(i=0; i<num_pixels; i++)
{
#ifdef WORDS_BIGENDIAN
dst[4*i + 1] = src[4*i + 3];
dst[4*i + 2] = src[4*i + 2];
dst[4*i + 3] = src[4*i + 1];
#else
dst[4*i + 0] = src[4*i + 2];
dst[4*i + 1] = src[4*i + 1];
dst[4*i + 2] = src[4*i + 0];
#endif
}
}
void rgb32tobgr24(const uint8_t *src, uint8_t *dst, long src_size)
{
long i;
long num_pixels = src_size >> 2;
for(i=0; i<num_pixels; i++)
{
#ifdef WORDS_BIGENDIAN
/* RGB32 (= A,B,G,R) -> BGR24 (= B,G,R) */
dst[3*i + 0] = src[4*i + 1];
dst[3*i + 1] = src[4*i + 2];
dst[3*i + 2] = src[4*i + 3];
#else
dst[3*i + 0] = src[4*i + 2];
dst[3*i + 1] = src[4*i + 1];
dst[3*i + 2] = src[4*i + 0];
#endif
}
}
void rgb24tobgr32(const uint8_t *src, uint8_t *dst, long src_size)
{
long i;
for(i=0; 3*i<src_size; i++)
{
#ifdef WORDS_BIGENDIAN
/* RGB24 (= R,G,B) -> BGR32 (= A,R,G,B) */
dst[4*i + 0] = 0;
dst[4*i + 1] = src[3*i + 0];
dst[4*i + 2] = src[3*i + 1];
dst[4*i + 3] = src[3*i + 2];
#else
dst[4*i + 0] = src[3*i + 2];
dst[4*i + 1] = src[3*i + 1];
dst[4*i + 2] = src[3*i + 0];
dst[4*i + 3] = 0;
#endif
}
}
char *sws_format_name(enum PixelFormat format)
{
switch (format) {
case PIX_FMT_YUV420P:
return "yuv420p";
case PIX_FMT_YUYV422:
return "yuyv422";
case PIX_FMT_RGB24:
return "rgb24";
case PIX_FMT_BGR24:
return "bgr24";
case PIX_FMT_YUV422P:
return "yuv422p";
case PIX_FMT_YUV444P:
return "yuv444p";
case PIX_FMT_RGB32:
return "rgb32";
case PIX_FMT_YUV410P:
return "yuv410p";
case PIX_FMT_YUV411P:
return "yuv411p";
case PIX_FMT_RGB565:
return "rgb565";
case PIX_FMT_RGB555:
return "rgb555";
case PIX_FMT_GRAY8:
return "gray8";
case PIX_FMT_MONOWHITE:
return "mono white";
case PIX_FMT_MONOBLACK:
return "mono black";
case PIX_FMT_PAL8:
return "Palette";
case PIX_FMT_YUVJ420P:
return "yuvj420p";
case PIX_FMT_YUVJ422P:
return "yuvj422p";
case PIX_FMT_YUVJ444P:
return "yuvj444p";
case PIX_FMT_XVMC_MPEG2_MC:
return "xvmc_mpeg2_mc";
case PIX_FMT_XVMC_MPEG2_IDCT:
return "xvmc_mpeg2_idct";
case PIX_FMT_UYVY422:
return "uyvy422";
case PIX_FMT_UYYVYY411:
return "uyyvyy411";
case PIX_FMT_RGB32_1:
return "rgb32x";
case PIX_FMT_BGR32_1:
return "bgr32x";
case PIX_FMT_BGR32:
return "bgr32";
case PIX_FMT_BGR565:
return "bgr565";
case PIX_FMT_BGR555:
return "bgr555";
case PIX_FMT_BGR8:
return "bgr8";
case PIX_FMT_BGR4:
return "bgr4";
case PIX_FMT_BGR4_BYTE:
return "bgr4 byte";
case PIX_FMT_RGB8:
return "rgb8";
case PIX_FMT_RGB4:
return "rgb4";
case PIX_FMT_RGB4_BYTE:
return "rgb4 byte";
case PIX_FMT_NV12:
return "nv12";
case PIX_FMT_NV21:
return "nv21";
default:
return "Unknown format";
}
}
#define YSCALE_YUV_2_PACKEDX_C(type) \
for(i=0; i<(dstW>>1); i++){\
int j;\
int Y1=1<<18;\
int Y2=1<<18;\
int U=1<<18;\
int V=1<<18;\
type *r, *b, *g;\
const int i2= 2*i;\
\
for(j=0; j<lumFilterSize; j++)\
{\
Y1 += lumSrc[j][i2] * lumFilter[j];\
Y2 += lumSrc[j][i2+1] * lumFilter[j];\
}\
for(j=0; j<chrFilterSize; j++)\
{\
U += chrSrc[j][i] * chrFilter[j];\
V += chrSrc[j][i+2048] * chrFilter[j];\
}\
Y1>>=19;\
Y2>>=19;\
U >>=19;\
V >>=19;\
if((Y1|Y2|U|V)&256)\
{\
if(Y1>255) Y1=255;\
else if(Y1<0)Y1=0;\
if(Y2>255) Y2=255;\
else if(Y2<0)Y2=0;\
if(U>255) U=255;\
else if(U<0) U=0;\
if(V>255) V=255;\
else if(V<0) V=0;\
}
#define YSCALE_YUV_2_RGBX_C(type) \
YSCALE_YUV_2_PACKEDX_C(type)\
r = c->table_rV[V];\
g = c->table_gU[U] + c->table_gV[V];\
b = c->table_bU[U];\
#define YSCALE_YUV_2_PACKED2_C \
for(i=0; i<(dstW>>1); i++){\
const int i2= 2*i;\
int Y1= (buf0[i2 ]*yalpha1+buf1[i2 ]*yalpha)>>19;\
int Y2= (buf0[i2+1]*yalpha1+buf1[i2+1]*yalpha)>>19;\
int U= (uvbuf0[i ]*uvalpha1+uvbuf1[i ]*uvalpha)>>19;\
int V= (uvbuf0[i+2048]*uvalpha1+uvbuf1[i+2048]*uvalpha)>>19;\
#define YSCALE_YUV_2_RGB2_C(type) \
YSCALE_YUV_2_PACKED2_C\
type *r, *b, *g;\
r = c->table_rV[V];\
g = c->table_gU[U] + c->table_gV[V];\
b = c->table_bU[U];\
#define YSCALE_YUV_2_PACKED1_C \
for(i=0; i<(dstW>>1); i++){\
const int i2= 2*i;\
int Y1= buf0[i2 ]>>7;\
int Y2= buf0[i2+1]>>7;\
int U= (uvbuf1[i ])>>7;\
int V= (uvbuf1[i+2048])>>7;\
#define YSCALE_YUV_2_RGB1_C(type) \
YSCALE_YUV_2_PACKED1_C\
type *r, *b, *g;\
r = c->table_rV[V];\
g = c->table_gU[U] + c->table_gV[V];\
b = c->table_bU[U];\
#define YSCALE_YUV_2_PACKED1B_C \
for(i=0; i<(dstW>>1); i++){\
const int i2= 2*i;\
int Y1= buf0[i2 ]>>7;\
int Y2= buf0[i2+1]>>7;\
int U= (uvbuf0[i ] + uvbuf1[i ])>>8;\
int V= (uvbuf0[i+2048] + uvbuf1[i+2048])>>8;\
#define YSCALE_YUV_2_RGB1B_C(type) \
YSCALE_YUV_2_PACKED1B_C\
type *r, *b, *g;\
r = c->table_rV[V];\
g = c->table_gU[U] + c->table_gV[V];\
b = c->table_bU[U];\
#define YSCALE_YUV_2_ANYRGB_C(func)\
switch(c->dstFormat)\
{\
case PIX_FMT_RGB32:\
case PIX_FMT_BGR32:\
func(uint32_t)\
((uint32_t*)dest)[i2+0]= r[Y1] + g[Y1] + b[Y1];\
((uint32_t*)dest)[i2+1]= r[Y2] + g[Y2] + b[Y2];\
} \
break;\
case PIX_FMT_RGB24:\
func(uint8_t)\
((uint8_t*)dest)[0]= r[Y1];\
((uint8_t*)dest)[1]= g[Y1];\
((uint8_t*)dest)[2]= b[Y1];\
((uint8_t*)dest)[3]= r[Y2];\
((uint8_t*)dest)[4]= g[Y2];\
((uint8_t*)dest)[5]= b[Y2];\
dest+=6;\
}\
break;\
case PIX_FMT_BGR24:\
func(uint8_t)\
((uint8_t*)dest)[0]= b[Y1];\
((uint8_t*)dest)[1]= g[Y1];\
((uint8_t*)dest)[2]= r[Y1];\
((uint8_t*)dest)[3]= b[Y2];\
((uint8_t*)dest)[4]= g[Y2];\
((uint8_t*)dest)[5]= r[Y2];\
dest+=6;\
}\
break;\
//Note: we have C, X86, MMX, MMX2, 3DNOW version therse no 3DNOW+MMX2 one
//Plain C versions
//#if !defined (HAVE_MMX) || defined (RUNTIME_CPUDETECT)
#define COMPILE_C
//#endif
/*
#ifdef ARCH_POWERPC
#if defined (HAVE_ALTIVEC) || defined (RUNTIME_CPUDETECT)
#define COMPILE_ALTIVEC
#endif //HAVE_ALTIVEC
#endif //ARCH_POWERPC
#if defined(ARCH_X86) || defined(ARCH_X86_64)
#if (defined (HAVE_MMX) && !defined (HAVE_3DNOW) && !defined (HAVE_MMX2)) || defined (RUNTIME_CPUDETECT)
#define COMPILE_MMX
#endif
#if defined (HAVE_MMX2) || defined (RUNTIME_CPUDETECT)
#define COMPILE_MMX2
#endif
#if (defined (HAVE_3DNOW) && !defined (HAVE_MMX2)) || defined (RUNTIME_CPUDETECT)
#define COMPILE_3DNOW
#endif
#endif //ARCH_X86 || ARCH_X86_64
#undef HAVE_MMX
#undef HAVE_MMX2
#undef HAVE_3DNOW
*/
#ifdef COMPILE_C
#undef HAVE_MMX
#undef HAVE_MMX2
#undef HAVE_3DNOW
#undef HAVE_ALTIVEC
#define RENAME(a) a ## _C
#include "swscale_template.c"
#endif
static double getSplineCoeff(double a, double b, double c, double d, double dist)
{
// printf("%f %f %f %f %f\n", a,b,c,d,dist);
if(dist<=1.0) return ((d*dist + c)*dist + b)*dist +a;
else return getSplineCoeff( 0.0,
b+ 2.0*c + 3.0*d,
c + 3.0*d,
-b- 3.0*c - 6.0*d,
dist-1.0);
}
static inline int initFilter(int16_t **outFilter, int16_t **filterPos, int *outFilterSize, int xInc,
int srcW, int dstW, int filterAlign, int one, int flags,
double param[2])
{
int i;
int filterSize;
int filter2Size;
int minFilterSize;
double *filter=NULL;
double *filter2=NULL;
// Note the +1 is for the MMXscaler which reads over the end
*filterPos = av_malloc((dstW+1)*sizeof(int16_t));
if(FFABS(xInc - 0x10000) <10) // unscaled
{
int i;
filterSize= 1;
filter= av_malloc(dstW*sizeof(double)*filterSize);
for(i=0; i<dstW*filterSize; i++) filter[i]=0;
for(i=0; i<dstW; i++)
{
filter[i*filterSize]=1;
(*filterPos)[i]=i;
}
}
else if(flags&SWS_POINT) // lame looking point sampling mode
{
int i;
int xDstInSrc;
filterSize= 1;
filter= av_malloc(dstW*sizeof(double)*filterSize);
xDstInSrc= xInc/2 - 0x8000;
for(i=0; i<dstW; i++)
{
int xx= (xDstInSrc - ((filterSize-1)<<15) + (1<<15))>>16;
(*filterPos)[i]= xx;
filter[i]= 1.0;
xDstInSrc+= xInc;
}
}
else if((xInc <= (1<<16) && (flags&SWS_AREA)) || (flags&SWS_FAST_BILINEAR)) // bilinear upscale
{
int i;
int xDstInSrc;
if (flags&SWS_BICUBIC) filterSize= 4;
else if(flags&SWS_X ) filterSize= 4;
else filterSize= 2; // SWS_BILINEAR / SWS_AREA
filter= av_malloc(dstW*sizeof(double)*filterSize);
xDstInSrc= xInc/2 - 0x8000;
for(i=0; i<dstW; i++)
{
int xx= (xDstInSrc - ((filterSize-1)<<15) + (1<<15))>>16;
int j;
(*filterPos)[i]= xx;
//Bilinear upscale / linear interpolate / Area averaging
for(j=0; j<filterSize; j++)
{
double d= FFABS((xx<<16) - xDstInSrc)/(double)(1<<16);
double coeff= 1.0 - d;
if(coeff<0) coeff=0;
filter[i*filterSize + j]= coeff;
xx++;
}
xDstInSrc+= xInc;
}
}
else
{
double xDstInSrc;
double sizeFactor, filterSizeInSrc;
const double xInc1= (double)xInc / (double)(1<<16);
if (flags&SWS_BICUBIC) sizeFactor= 4.0;
else if(flags&SWS_X) sizeFactor= 8.0;
else if(flags&SWS_AREA) sizeFactor= 1.0; //downscale only, for upscale it is bilinear
else if(flags&SWS_GAUSS) sizeFactor= 8.0; // infinite ;)
else if(flags&SWS_LANCZOS) sizeFactor= param[0] != SWS_PARAM_DEFAULT ? 2.0*param[0] : 6.0;
else if(flags&SWS_SINC) sizeFactor= 20.0; // infinite ;)
else if(flags&SWS_SPLINE) sizeFactor= 20.0; // infinite ;)
else if(flags&SWS_BILINEAR) sizeFactor= 2.0;
else {
sizeFactor= 0.0; //GCC warning killer
ASSERT(0)
}
if(xInc1 <= 1.0) filterSizeInSrc= sizeFactor; // upscale
else filterSizeInSrc= sizeFactor*srcW / (double)dstW;
filterSize= (int)ceil(1 + filterSizeInSrc); // will be reduced later if possible
if(filterSize > srcW-2) filterSize=srcW-2;
filter= av_malloc(dstW*sizeof(double)*filterSize);
xDstInSrc= xInc1 / 2.0 - 0.5;
for(i=0; i<dstW; i++)
{
int xx= (int)(xDstInSrc - (filterSize-1)*0.5 + 0.5);
int j;
(*filterPos)[i]= xx;
for(j=0; j<filterSize; j++)
{
double d= FFABS(xx - xDstInSrc)/filterSizeInSrc*sizeFactor;
double coeff;
if(flags & SWS_BICUBIC)
{
double B= param[0] != SWS_PARAM_DEFAULT ? param[0] : 0.0;
double C= param[1] != SWS_PARAM_DEFAULT ? param[1] : 0.6;
if(d<1.0)
coeff = (12-9*B-6*C)*d*d*d + (-18+12*B+6*C)*d*d + 6-2*B;
else if(d<2.0)
coeff = (-B-6*C)*d*d*d + (6*B+30*C)*d*d + (-12*B-48*C)*d +8*B+24*C;
else
coeff=0.0;
}
/* else if(flags & SWS_X)
{
double p= param ? param*0.01 : 0.3;
coeff = d ? sin(d*PI)/(d*PI) : 1.0;
coeff*= pow(2.0, - p*d*d);
}*/
else if(flags & SWS_X)
{
double A= param[0] != SWS_PARAM_DEFAULT ? param[0] : 1.0;
if(d<1.0)
coeff = cos(d*PI);
else
coeff=-1.0;
if(coeff<0.0) coeff= -pow(-coeff, A);
else coeff= pow( coeff, A);
coeff= coeff*0.5 + 0.5;
}
else if(flags & SWS_AREA)
{
double srcPixelSize= 1.0/xInc1;
if(d + srcPixelSize/2 < 0.5) coeff= 1.0;
else if(d - srcPixelSize/2 < 0.5) coeff= (0.5-d)/srcPixelSize + 0.5;
else coeff=0.0;
}
else if(flags & SWS_GAUSS)
{
double p= param[0] != SWS_PARAM_DEFAULT ? param[0] : 3.0;
coeff = pow(2.0, - p*d*d);
}
else if(flags & SWS_SINC)
{
coeff = d ? sin(d*PI)/(d*PI) : 1.0;
}
else if(flags & SWS_LANCZOS)
{
double p= param[0] != SWS_PARAM_DEFAULT ? param[0] : 3.0;
coeff = d ? sin(d*PI)*sin(d*PI/p)/(d*d*PI*PI/p) : 1.0;
if(d>p) coeff=0;
}
else if(flags & SWS_BILINEAR)
{
coeff= 1.0 - d;
if(coeff<0) coeff=0;
}
else if(flags & SWS_SPLINE)
{
double p=-2.196152422706632;
coeff = getSplineCoeff(1.0, 0.0, p, -p-1.0, d);
}
else {
coeff= 0.0; //GCC warning killer
ASSERT(0)
}
filter[i*filterSize + j]= coeff;
xx++;
}
xDstInSrc+= xInc1;
}
}
/* apply src & dst Filter to filter -> filter2
av_free(filter);
*/
ASSERT(filterSize>0)
filter2Size= filterSize;
ASSERT(filter2Size>0)
filter2= av_malloc(filter2Size*dstW*sizeof(double));
for(i=0; i<dstW; i++)
{
int j;
SwsVector scaleFilter;
SwsVector *outVec;
scaleFilter.coeff= filter + i*filterSize;
scaleFilter.length= filterSize;
outVec= &scaleFilter;
ASSERT(outVec->length == filter2Size)
for(j=0; j<outVec->length; j++)
{
filter2[i*filter2Size + j]= outVec->coeff[j];
}
(*filterPos)[i]+= (filterSize-1)/2 - (filter2Size-1)/2;
if(outVec != &scaleFilter) sws_freeVec(outVec);
}
av_free(filter); filter=NULL;
/* try to reduce the filter-size (step1 find size and shift left) */
// Assume its near normalized (*0.5 or *2.0 is ok but * 0.001 is not)
minFilterSize= 0;
for(i=dstW-1; i>=0; i--)
{
int min= filter2Size;
int j;
double cutOff=0.0;
/* get rid off near zero elements on the left by shifting left */
for(j=0; j<filter2Size; j++)
{
int k;
cutOff += FFABS(filter2[i*filter2Size]);
if(cutOff > SWS_MAX_REDUCE_CUTOFF) break;
/* preserve Monotonicity because the core can't handle the filter otherwise */
if(i<dstW-1 && (*filterPos)[i] >= (*filterPos)[i+1]) break;
// Move filter coeffs left
for(k=1; k<filter2Size; k++)
filter2[i*filter2Size + k - 1]= filter2[i*filter2Size + k];
filter2[i*filter2Size + k - 1]= 0.0;
(*filterPos)[i]++;
}
cutOff=0.0;
/* count near zeros on the right */
for(j=filter2Size-1; j>0; j--)
{
cutOff += FFABS(filter2[i*filter2Size + j]);
if(cutOff > SWS_MAX_REDUCE_CUTOFF) break;
min--;
}
if(min>minFilterSize) minFilterSize= min;
}
if (flags & SWS_CPU_CAPS_ALTIVEC) {
// we can handle the special case 4,
// so we don't want to go to the full 8
if (minFilterSize < 5)
filterAlign = 4;
// we really don't want to waste our time
// doing useless computation, so fall-back on
// the scalar C code for very small filter.
// vectorizing is worth it only if you have
// decent-sized vector.
if (minFilterSize < 3)
filterAlign = 1;
}
if (flags & SWS_CPU_CAPS_MMX) {
// special case for unscaled vertical filtering
if(minFilterSize == 1 && filterAlign == 2)
filterAlign= 1;
}
ASSERT(minFilterSize > 0)
filterSize= (minFilterSize +(filterAlign-1)) & (~(filterAlign-1));
ASSERT(filterSize > 0)
filter= av_malloc(filterSize*dstW*sizeof(double));
if(filterSize >= MAX_FILTER_SIZE)
return -1;
*outFilterSize= filterSize;
if(flags&SWS_PRINT_INFO)
MSG_V("SwScaler: reducing / aligning filtersize %d -> %d\n", filter2Size, filterSize);
/* try to reduce the filter-size (step2 reduce it) */
for(i=0; i<dstW; i++)
{
int j;
for(j=0; j<filterSize; j++)
{
if(j>=filter2Size) filter[i*filterSize + j]= 0.0;
else filter[i*filterSize + j]= filter2[i*filter2Size + j];
}
}
av_free(filter2); filter2=NULL;
//FIXME try to align filterpos if possible
//fix borders
for(i=0; i<dstW; i++)
{
int j;
if((*filterPos)[i] < 0)
{
// Move filter coeffs left to compensate for filterPos
for(j=1; j<filterSize; j++)
{
int left= FFMAX(j + (*filterPos)[i], 0);
filter[i*filterSize + left] += filter[i*filterSize + j];
filter[i*filterSize + j]=0;
}
(*filterPos)[i]= 0;
}
if((*filterPos)[i] + filterSize > srcW)
{
int shift= (*filterPos)[i] + filterSize - srcW;
// Move filter coeffs right to compensate for filterPos
for(j=filterSize-2; j>=0; j--)
{
int right= FFMIN(j + shift, filterSize-1);
filter[i*filterSize +right] += filter[i*filterSize +j];
filter[i*filterSize +j]=0;
}
(*filterPos)[i]= srcW - filterSize;
}
}
// Note the +1 is for the MMXscaler which reads over the end
/* align at 16 for AltiVec (needed by hScale_altivec_real) */
*outFilter= av_malloc(*outFilterSize*(dstW+1)*sizeof(int16_t));
memset(*outFilter, 0, *outFilterSize*(dstW+1)*sizeof(int16_t));
/* Normalize & Store in outFilter */
for(i=0; i<dstW; i++)
{
int j;
double error=0;
double sum=0;
double scale= one;
for(j=0; j<filterSize; j++)
{
sum+= filter[i*filterSize + j];
}
scale/= sum;
for(j=0; j<*outFilterSize; j++)
{
double v= filter[i*filterSize + j]*scale + error;
int intV= floor(v + 0.5);
(*outFilter)[i*(*outFilterSize) + j]= intV;
error = v - intV;
}
}
(*filterPos)[dstW]= (*filterPos)[dstW-1]; // the MMX scaler will read over the end
for(i=0; i<*outFilterSize; i++)
{
int j= dstW*(*outFilterSize);
(*outFilter)[j + i]= (*outFilter)[j + i - (*outFilterSize)];
}
av_free(filter);
return 0;
}
static void globalInit(void){
// generating tables:
int i;
for(i=0; i<768; i++){
int c= FFMIN(FFMAX(i-256, 0), 255);
clip_table[i]=c;
}
}
static SwsFunc getSwsFunc(int flags){
return swScale_C;
}
/* {RGB,BGR}{24,32} -> {RGB,BGR}{24,32} */
static int rgb2rgbWrapper(SwsContext *c, uint8_t* src, int srcStride, int srcSliceY,
int srcSliceH, uint8_t* dst, int dstStride){
const int srcFormat= c->srcFormat;
const int dstFormat= c->dstFormat;
const int srcBpp= (fmt_depth(srcFormat) + 7) >> 3;
const int dstBpp= (fmt_depth(dstFormat) + 7) >> 3;
const int srcId= fmt_depth(srcFormat) >> 2; /* 1:0, 4:1, 8:2, 15:3, 16:4, 24:6, 32:8 */
const int dstId= fmt_depth(dstFormat) >> 2;
void (*conv)(const uint8_t *src, uint8_t *dst, long src_size)=NULL;
/* BGR -> BGR */
if( (isBGR(srcFormat) && isBGR(dstFormat))
|| (isRGB(srcFormat) && isRGB(dstFormat))){
switch(srcId | (dstId<<4)){
case 0x68: conv= rgb32to24; break;
case 0x86: conv= rgb24to32; break;
default: MSG_ERR("swScaler: internal error %s -> %s converter\n",
sws_format_name(srcFormat), sws_format_name(dstFormat)); break;
}
}else if( (isBGR(srcFormat) && isRGB(dstFormat))
|| (isRGB(srcFormat) && isBGR(dstFormat))){
switch(srcId | (dstId<<4)){
case 0x66: conv= rgb24tobgr24; break;
case 0x68: conv= rgb32tobgr24; break;
case 0x86: conv= rgb24tobgr32; break;
case 0x88: conv= rgb32tobgr32; break;
default: MSG_ERR("swScaler: internal error %s -> %s converter\n",
sws_format_name(srcFormat), sws_format_name(dstFormat)); break;
}
}else{
MSG_ERR("swScaler: internal error %s -> %s converter\n",
sws_format_name(srcFormat), sws_format_name(dstFormat));
}
if(dstStride*srcBpp == srcStride*dstBpp)
conv(src, dst + dstStride*srcSliceY, srcSliceH*srcStride);
else
{
int i;
uint8_t *srcPtr= src;
uint8_t *dstPtr= dst + dstStride*srcSliceY;
for(i=0; i<srcSliceH; i++)
{
conv(srcPtr, dstPtr, c->srcW*srcBpp);
srcPtr+= srcStride;
dstPtr+= dstStride;
}
}
return srcSliceH;
}
/* unscaled copy like stuff (assumes nearly identical formats) */
static int simpleCopy(SwsContext *c, uint8_t* src, int srcStride, int srcSliceY,
int srcSliceH, uint8_t* dst, int dstStride)
{
// NOTE: Narflex: I changed this to work properly for subimages; but restricted it to 32 bpp
int i;
uint8_t *srcPtr= src;
uint8_t *dstPtr= dst + dstStride*srcSliceY;
int length = c->srcW * 4;
for (i=0;i<srcSliceH;i++)
{
memcpy(dstPtr, srcPtr, length);
srcPtr+= srcStride;
dstPtr+= dstStride;
}
return srcSliceH;
/* if(dstStride==srcStride && srcStride > 0)
memcpy(dst + dstStride*srcSliceY, src, srcSliceH*dstStride);
else
{
int i;
uint8_t *srcPtr= src;
uint8_t *dstPtr= dst + dstStride*srcSliceY;
int length=0;
/* universal length finder */
/* while(length+c->srcW <= FFABS(dstStride)
&& length+c->srcW <= FFABS(srcStride)) length+= c->srcW;
ASSERT(length!=0);
for(i=0; i<srcSliceH; i++)
{
memcpy(dstPtr, srcPtr, length);
srcPtr+= srcStride;
dstPtr+= dstStride;
}
}
return srcSliceH;*/
}
static uint16_t roundToInt16(int64_t f){
int r= (f + (1<<15))>>16;
if(r<-0x7FFF) return 0x8000;
else if(r> 0x7FFF) return 0x7FFF;
else return r;
}
static int div_round (int dividend, int divisor)
{
if (dividend > 0)
return (dividend + (divisor>>1)) / divisor;
else
return -((-dividend + (divisor>>1)) / divisor);
}
SwsContext *sws_getContext(int srcW, int srcH, int srcFormat, int dstW, int dstH, int dstFormat, int flags,
double *param){
SwsContext *c;
int i;
int usesVFilter, usesHFilter;
int unscaled;
int srcRange, dstRange;
flags &= ~(SWS_CPU_CAPS_MMX|SWS_CPU_CAPS_MMX2|SWS_CPU_CAPS_3DNOW|SWS_CPU_CAPS_ALTIVEC);
if(clip_table[512] != 255) globalInit();
unscaled = (srcW == dstW && srcH == dstH);
if(!isSupportedIn(srcFormat))
{
MSG_ERR("swScaler: %s is not supported as input format\n", sws_format_name(srcFormat));
return NULL;
}
if(!isSupportedOut(dstFormat))
{
MSG_ERR("swScaler: %s is not supported as output format\n", sws_format_name(dstFormat));
return NULL;
}
/* sanity check */
if(srcW<4 || srcH<1 || dstW<8 || dstH<1) //FIXME check if these are enough and try to lowwer them after fixing the relevant parts of the code
{
MSG_ERR("swScaler: %dx%d -> %dx%d is invalid scaling dimension\n",
srcW, srcH, dstW, dstH);
return NULL;
}
c= av_malloc(sizeof(SwsContext));
memset(c, 0, sizeof(SwsContext));
c->srcW= srcW;
c->srcH= srcH;
c->dstW= dstW;
c->dstH= dstH;
c->lumXInc= ((srcW<<16) + (dstW>>1))/dstW;
c->lumYInc= ((srcH<<16) + (dstH>>1))/dstH;
c->flags= flags;
c->dstFormat= dstFormat;
c->srcFormat= srcFormat;
c->vRounder= 4* 0x0001000100010001ULL;
usesHFilter= usesVFilter= 0;
c->chrSrcHSubSample = c->chrSrcVSubSample = c->chrDstHSubSample = c->chrDstVSubSample = 0;
if(param){
c->param[0] = param[0];
c->param[1] = param[1];
}else{
c->param[0] =
c->param[1] = SWS_PARAM_DEFAULT;
}
c->chrIntHSubSample= c->chrDstHSubSample;
c->chrIntVSubSample= c->chrSrcVSubSample;
// note the -((-x)>>y) is so that we allways round toward +inf
c->chrSrcW= -((-srcW) >> c->chrSrcHSubSample);
c->chrSrcH= -((-srcH) >> c->chrSrcVSubSample);
c->chrDstW= -((-dstW) >> c->chrDstHSubSample);
c->chrDstH= -((-dstH) >> c->chrDstVSubSample);
/* unscaled special Cases */
if(unscaled && !usesHFilter && !usesVFilter)
{
/* rgb/bgr -> rgb/bgr (no dither needed forms) */
if( (isBGR(srcFormat) || isRGB(srcFormat))
&& (isBGR(dstFormat) || isRGB(dstFormat)))
c->swScale= rgb2rgbWrapper;
/* simple copy */
if( srcFormat == dstFormat
|| (isPlanarYUV(srcFormat) && isGray(dstFormat))
|| (isPlanarYUV(dstFormat) && isGray(srcFormat))
)
{
c->swScale= simpleCopy;
}
if(c->swScale){
if(flags&SWS_PRINT_INFO)
MSG_INFO("SwScaler: using unscaled %s -> %s special converter\n",
sws_format_name(srcFormat), sws_format_name(dstFormat));
return c;
}
}
c->chrXInc= ((c->chrSrcW<<16) + (c->chrDstW>>1))/c->chrDstW;
c->chrYInc= ((c->chrSrcH<<16) + (c->chrDstH>>1))/c->chrDstH;
/* precalculate horizontal scaler filter coefficients */
{
const int filterAlign=1;
initFilter(&c->hLumFilter, &c->hLumFilterPos, &c->hLumFilterSize, c->lumXInc,
srcW , dstW, filterAlign, 1<<14,
(flags&SWS_BICUBLIN) ? (flags|SWS_BICUBIC) : flags,
c->param);
} // Init Horizontal stuff
/* precalculate vertical scaler filter coefficients */
{
const int filterAlign=1;
initFilter(&c->vLumFilter, &c->vLumFilterPos, &c->vLumFilterSize, c->lumYInc,
srcH , dstH, filterAlign, (1<<12),//(1<<12)-4,
(flags&SWS_BICUBLIN) ? (flags|SWS_BICUBIC) : flags,
c->param);
}
// Calculate Buffer Sizes so that they won't run out while handling these damn slices
c->vLumBufSize= c->vLumFilterSize;
for(i=0; i<dstH; i++)
{
int nextSlice= c->vLumFilterPos[i] + c->vLumFilterSize - 1;
nextSlice>>= c->chrSrcVSubSample;
nextSlice<<= c->chrSrcVSubSample;
if(c->vLumFilterPos[i] + c->vLumBufSize < nextSlice)
c->vLumBufSize= nextSlice - c->vLumFilterPos[i ];
}
// allocate pixbufs (we use dynamic allocation because otherwise we would need to
// This is a 2-D array because we need to store multiple lines after horizontal filtering
// for the inputs to the vertical filters
c->lumPixBuf= av_malloc(c->vLumBufSize*2*sizeof(uint8_t*));
//Note we need at least one pixel more at the end because of the mmx code (just in case someone wanna replace the 4000/8000)
/* align at 16 bytes for AltiVec */
// We upped this to 16000 from 4000 because we're putting 32bpp in this array for ARGB scaling
for(i=0; i<c->vLumBufSize; i++)
c->lumPixBuf[i]= c->lumPixBuf[i+c->vLumBufSize]= av_malloc((dstW+1)*4);
//try to avoid drawing green stuff between the right end and the stride end
for(i=0; i<c->vLumBufSize; i++) memset(c->lumPixBuf[i], 0, (dstW+1)*4);
ASSERT(c->chrDstH <= dstH)
if(flags&SWS_PRINT_INFO)
{
#ifdef DITHER1XBPP
char *dither= " dithered";
#else
char *dither= "";
#endif
if(flags&SWS_FAST_BILINEAR)
MSG_INFO("\nSwScaler: FAST_BILINEAR scaler, ");
else if(flags&SWS_BILINEAR)
MSG_INFO("\nSwScaler: BILINEAR scaler, ");
else if(flags&SWS_BICUBIC)
MSG_INFO("\nSwScaler: BICUBIC scaler, ");
else if(flags&SWS_X)
MSG_INFO("\nSwScaler: Experimental scaler, ");
else if(flags&SWS_POINT)
MSG_INFO("\nSwScaler: Nearest Neighbor / POINT scaler, ");
else if(flags&SWS_AREA)
MSG_INFO("\nSwScaler: Area Averageing scaler, ");
else if(flags&SWS_BICUBLIN)
MSG_INFO("\nSwScaler: luma BICUBIC / chroma BILINEAR scaler, ");
else if(flags&SWS_GAUSS)
MSG_INFO("\nSwScaler: Gaussian scaler, ");
else if(flags&SWS_SINC)
MSG_INFO("\nSwScaler: Sinc scaler, ");
else if(flags&SWS_LANCZOS)
MSG_INFO("\nSwScaler: Lanczos scaler, ");
else if(flags&SWS_SPLINE)
MSG_INFO("\nSwScaler: Bicubic spline scaler, ");
else
MSG_INFO("\nSwScaler: ehh flags invalid?! ");
if(dstFormat==PIX_FMT_BGR555 || dstFormat==PIX_FMT_BGR565)
MSG_INFO("from %s to%s %s ",
sws_format_name(srcFormat), dither, sws_format_name(dstFormat));
else
MSG_INFO("from %s to %s ",
sws_format_name(srcFormat), sws_format_name(dstFormat));
MSG_INFO("using C\n");
}
if(flags & SWS_PRINT_INFO)
{
if(flags & SWS_FAST_BILINEAR)
MSG_V("SwScaler: using FAST_BILINEAR C scaler for horizontal scaling\n");
else
MSG_V("SwScaler: using C scaler for horizontal scaling\n");
if(c->vLumFilterSize==1 && c->vChrFilterSize==2)
MSG_V("SwScaler: using 1-tap %s \"scaler\" for vertical luminance scaling (BGR)\n"
"SwScaler: 2-tap scaler for vertical chrominance scaling (BGR)\n",(flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");
else if(c->vLumFilterSize==2 && c->vChrFilterSize==2)
MSG_V("SwScaler: using 2-tap linear %s scaler for vertical scaling (BGR)\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");
else
MSG_V("SwScaler: using n-tap %s scaler for vertical scaling (BGR)\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");
if(dstFormat==PIX_FMT_BGR24)
MSG_V("SwScaler: using %s YV12->BGR24 Converter\n",
(flags & SWS_CPU_CAPS_MMX2) ? "MMX2" : ((flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C"));
else if(dstFormat==PIX_FMT_RGB32)
MSG_V("SwScaler: using %s YV12->BGR32 Converter\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");
else if(dstFormat==PIX_FMT_BGR565)
MSG_V("SwScaler: using %s YV12->BGR16 Converter\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");
else if(dstFormat==PIX_FMT_BGR555)
MSG_V("SwScaler: using %s YV12->BGR15 Converter\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");
MSG_V("SwScaler: %dx%d -> %dx%d\n", srcW, srcH, dstW, dstH);
}
if(flags & SWS_PRINT_INFO)
{
MSG_DBG2("SwScaler:Lum srcW=%d srcH=%d dstW=%d dstH=%d xInc=%d yInc=%d\n",
c->srcW, c->srcH, c->dstW, c->dstH, c->lumXInc, c->lumYInc);
MSG_DBG2("SwScaler:Chr srcW=%d srcH=%d dstW=%d dstH=%d xInc=%d yInc=%d\n",
c->chrSrcW, c->chrSrcH, c->chrDstW, c->chrDstH, c->chrXInc, c->chrYInc);
}
c->swScale= getSwsFunc(flags);
return c;
}
/**
* swscale warper, so we don't need to export the SwsContext
*/
int sws_scale(SwsContext *c, uint8_t* src, int srcStride, int srcSliceY,
int srcSliceH, uint8_t* dst, int dstStride){
//printf("sws: slice %d %d\n", srcSliceY, srcSliceH);
return c->swScale(c, src, srcStride, srcSliceY, srcSliceH, dst, dstStride);
}
void sws_freeVec(SwsVector *a){
if(!a) return;
av_free(a->coeff);
a->coeff=NULL;
a->length=0;
av_free(a);
}
void sws_freeFilter(SwsFilter *filter){
if(!filter) return;
if(filter->lumH) sws_freeVec(filter->lumH);
if(filter->lumV) sws_freeVec(filter->lumV);
if(filter->chrH) sws_freeVec(filter->chrH);
if(filter->chrV) sws_freeVec(filter->chrV);
av_free(filter);
}
void sws_freeContext(SwsContext *c){
int i;
if(!c) return;
if(c->lumPixBuf)
{
for(i=0; i<c->vLumBufSize; i++)
{
av_free(c->lumPixBuf[i]);
c->lumPixBuf[i]=NULL;
}
av_free(c->lumPixBuf);
c->lumPixBuf=NULL;
}
if(c->chrPixBuf)
{
for(i=0; i<c->vChrBufSize; i++)
{
av_free(c->chrPixBuf[i]);
c->chrPixBuf[i]=NULL;
}
av_free(c->chrPixBuf);
c->chrPixBuf=NULL;
}
av_free(c->vLumFilter);
c->vLumFilter = NULL;
av_free(c->vChrFilter);
c->vChrFilter = NULL;
av_free(c->hLumFilter);
c->hLumFilter = NULL;
av_free(c->hChrFilter);
c->hChrFilter = NULL;
av_free(c->vLumFilterPos);
c->vLumFilterPos = NULL;
av_free(c->vChrFilterPos);
c->vChrFilterPos = NULL;
av_free(c->hLumFilterPos);
c->hLumFilterPos = NULL;
av_free(c->hChrFilterPos);
c->hChrFilterPos = NULL;
av_free(c);
}