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FFmpeg/libswscale/swscale_unscaled.c
Michael Niedermayer 657878f76e sws: fix copy case detection with gray8a. 
Fixes gray_alpha.png

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
2012-01-22 00:46:19 +01:00

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/*
* Copyright (C) 2001-2011 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 Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <inttypes.h>
#include <string.h>
#include <math.h>
#include <stdio.h>
#include "config.h"
#include <assert.h>
#include "swscale.h"
#include "swscale_internal.h"
#include "rgb2rgb.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/cpu.h"
#include "libavutil/avutil.h"
#include "libavutil/mathematics.h"
#include "libavutil/bswap.h"
#include "libavutil/pixdesc.h"
#define RGB2YUV_SHIFT 15
#define BY ( (int) (0.114 * 219 / 255 * (1 << RGB2YUV_SHIFT) + 0.5))
#define BV (-(int) (0.081 * 224 / 255 * (1 << RGB2YUV_SHIFT) + 0.5))
#define BU ( (int) (0.500 * 224 / 255 * (1 << RGB2YUV_SHIFT) + 0.5))
#define GY ( (int) (0.587 * 219 / 255 * (1 << RGB2YUV_SHIFT) + 0.5))
#define GV (-(int) (0.419 * 224 / 255 * (1 << RGB2YUV_SHIFT) + 0.5))
#define GU (-(int) (0.331 * 224 / 255 * (1 << RGB2YUV_SHIFT) + 0.5))
#define RY ( (int) (0.299 * 219 / 255 * (1 << RGB2YUV_SHIFT) + 0.5))
#define RV ( (int) (0.500 * 224 / 255 * (1 << RGB2YUV_SHIFT) + 0.5))
#define RU (-(int) (0.169 * 224 / 255 * (1 << RGB2YUV_SHIFT) + 0.5))
static void fillPlane(uint8_t *plane, int stride, int width, int height, int y,
uint8_t val)
{
int i;
uint8_t *ptr = plane + stride * y;
for (i = 0; i < height; i++) {
memset(ptr, val, width);
ptr += stride;
}
}
static void copyPlane(const uint8_t *src, int srcStride,
int srcSliceY, int srcSliceH, int width,
uint8_t *dst, int dstStride)
{
dst += dstStride * srcSliceY;
if (dstStride == srcStride && srcStride > 0) {
memcpy(dst, src, srcSliceH * dstStride);
} else {
int i;
for (i = 0; i < srcSliceH; i++) {
memcpy(dst, src, width);
src += srcStride;
dst += dstStride;
}
}
}
static int planarToNv12Wrapper(SwsContext *c, const uint8_t *src[],
int srcStride[], int srcSliceY,
int srcSliceH, uint8_t *dstParam[],
int dstStride[])
{
uint8_t *dst = dstParam[1] + dstStride[1] * srcSliceY / 2;
copyPlane(src[0], srcStride[0], srcSliceY, srcSliceH, c->srcW,
dstParam[0], dstStride[0]);
if (c->dstFormat == PIX_FMT_NV12)
interleaveBytes(src[1], src[2], dst, c->srcW / 2, srcSliceH / 2,
srcStride[1], srcStride[2], dstStride[0]);
else
interleaveBytes(src[2], src[1], dst, c->srcW / 2, srcSliceH / 2,
srcStride[2], srcStride[1], dstStride[0]);
return srcSliceH;
}
static int planarToYuy2Wrapper(SwsContext *c, const uint8_t *src[],
int srcStride[], int srcSliceY, int srcSliceH,
uint8_t *dstParam[], int dstStride[])
{
uint8_t *dst = dstParam[0] + dstStride[0] * srcSliceY;
yv12toyuy2(src[0], src[1], src[2], dst, c->srcW, srcSliceH, srcStride[0],
srcStride[1], dstStride[0]);
return srcSliceH;
}
static int planarToUyvyWrapper(SwsContext *c, const uint8_t *src[],
int srcStride[], int srcSliceY, int srcSliceH,
uint8_t *dstParam[], int dstStride[])
{
uint8_t *dst = dstParam[0] + dstStride[0] * srcSliceY;
yv12touyvy(src[0], src[1], src[2], dst, c->srcW, srcSliceH, srcStride[0],
srcStride[1], dstStride[0]);
return srcSliceH;
}
static int yuv422pToYuy2Wrapper(SwsContext *c, const uint8_t *src[],
int srcStride[], int srcSliceY, int srcSliceH,
uint8_t *dstParam[], int dstStride[])
{
uint8_t *dst = dstParam[0] + dstStride[0] * srcSliceY;
yuv422ptoyuy2(src[0], src[1], src[2], dst, c->srcW, srcSliceH, srcStride[0],
srcStride[1], dstStride[0]);
return srcSliceH;
}
static int yuv422pToUyvyWrapper(SwsContext *c, const uint8_t *src[],
int srcStride[], int srcSliceY, int srcSliceH,
uint8_t *dstParam[], int dstStride[])
{
uint8_t *dst = dstParam[0] + dstStride[0] * srcSliceY;
yuv422ptouyvy(src[0], src[1], src[2], dst, c->srcW, srcSliceH, srcStride[0],
srcStride[1], dstStride[0]);
return srcSliceH;
}
static int yuyvToYuv420Wrapper(SwsContext *c, const uint8_t *src[],
int srcStride[], int srcSliceY, int srcSliceH,
uint8_t *dstParam[], int dstStride[])
{
uint8_t *ydst = dstParam[0] + dstStride[0] * srcSliceY;
uint8_t *udst = dstParam[1] + dstStride[1] * srcSliceY / 2;
uint8_t *vdst = dstParam[2] + dstStride[2] * srcSliceY / 2;
yuyvtoyuv420(ydst, udst, vdst, src[0], c->srcW, srcSliceH, dstStride[0],
dstStride[1], srcStride[0]);
if (dstParam[3])
fillPlane(dstParam[3], dstStride[3], c->srcW, srcSliceH, srcSliceY, 255);
return srcSliceH;
}
static int yuyvToYuv422Wrapper(SwsContext *c, const uint8_t *src[],
int srcStride[], int srcSliceY, int srcSliceH,
uint8_t *dstParam[], int dstStride[])
{
uint8_t *ydst = dstParam[0] + dstStride[0] * srcSliceY;
uint8_t *udst = dstParam[1] + dstStride[1] * srcSliceY;
uint8_t *vdst = dstParam[2] + dstStride[2] * srcSliceY;
yuyvtoyuv422(ydst, udst, vdst, src[0], c->srcW, srcSliceH, dstStride[0],
dstStride[1], srcStride[0]);
return srcSliceH;
}
static int uyvyToYuv420Wrapper(SwsContext *c, const uint8_t *src[],
int srcStride[], int srcSliceY, int srcSliceH,
uint8_t *dstParam[], int dstStride[])
{
uint8_t *ydst = dstParam[0] + dstStride[0] * srcSliceY;
uint8_t *udst = dstParam[1] + dstStride[1] * srcSliceY / 2;
uint8_t *vdst = dstParam[2] + dstStride[2] * srcSliceY / 2;
uyvytoyuv420(ydst, udst, vdst, src[0], c->srcW, srcSliceH, dstStride[0],
dstStride[1], srcStride[0]);
if (dstParam[3])
fillPlane(dstParam[3], dstStride[3], c->srcW, srcSliceH, srcSliceY, 255);
return srcSliceH;
}
static int uyvyToYuv422Wrapper(SwsContext *c, const uint8_t *src[],
int srcStride[], int srcSliceY, int srcSliceH,
uint8_t *dstParam[], int dstStride[])
{
uint8_t *ydst = dstParam[0] + dstStride[0] * srcSliceY;
uint8_t *udst = dstParam[1] + dstStride[1] * srcSliceY;
uint8_t *vdst = dstParam[2] + dstStride[2] * srcSliceY;
uyvytoyuv422(ydst, udst, vdst, src[0], c->srcW, srcSliceH, dstStride[0],
dstStride[1], srcStride[0]);
return srcSliceH;
}
static void gray8aToPacked32(const uint8_t *src, uint8_t *dst, int num_pixels,
const uint8_t *palette)
{
int i;
for (i = 0; i < num_pixels; i++)
((uint32_t *) dst)[i] = ((const uint32_t *) palette)[src[i << 1]] | (src[(i << 1) + 1] << 24);
}
static void gray8aToPacked32_1(const uint8_t *src, uint8_t *dst, int num_pixels,
const uint8_t *palette)
{
int i;
for (i = 0; i < num_pixels; i++)
((uint32_t *) dst)[i] = ((const uint32_t *) palette)[src[i << 1]] | src[(i << 1) + 1];
}
static void gray8aToPacked24(const uint8_t *src, uint8_t *dst, int num_pixels,
const uint8_t *palette)
{
int i;
for (i = 0; i < num_pixels; i++) {
//FIXME slow?
dst[0] = palette[src[i << 1] * 4 + 0];
dst[1] = palette[src[i << 1] * 4 + 1];
dst[2] = palette[src[i << 1] * 4 + 2];
dst += 3;
}
}
static int packed_16bpc_bswap(SwsContext *c, const uint8_t *src[],
int srcStride[], int srcSliceY, int srcSliceH,
uint8_t *dst[], int dstStride[])
{
int i, j;
int srcstr = srcStride[0] >> 1;
int dststr = dstStride[0] >> 1;
uint16_t *dstPtr = (uint16_t *) dst[0];
const uint16_t *srcPtr = (const uint16_t *) src[0];
int min_stride = FFMIN(srcstr, dststr);
for (i = 0; i < srcSliceH; i++) {
for (j = 0; j < min_stride; j++) {
dstPtr[j] = av_bswap16(srcPtr[j]);
}
srcPtr += srcstr;
dstPtr += dststr;
}
return srcSliceH;
}
static int palToRgbWrapper(SwsContext *c, const uint8_t *src[], int srcStride[],
int srcSliceY, int srcSliceH, uint8_t *dst[],
int dstStride[])
{
const enum PixelFormat srcFormat = c->srcFormat;
const enum PixelFormat dstFormat = c->dstFormat;
void (*conv)(const uint8_t *src, uint8_t *dst, int num_pixels,
const uint8_t *palette) = NULL;
int i;
uint8_t *dstPtr = dst[0] + dstStride[0] * srcSliceY;
const uint8_t *srcPtr = src[0];
if (srcFormat == PIX_FMT_GRAY8A) {
switch (dstFormat) {
case PIX_FMT_RGB32 : conv = gray8aToPacked32; break;
case PIX_FMT_BGR32 : conv = gray8aToPacked32; break;
case PIX_FMT_BGR32_1: conv = gray8aToPacked32_1; break;
case PIX_FMT_RGB32_1: conv = gray8aToPacked32_1; break;
case PIX_FMT_RGB24 : conv = gray8aToPacked24; break;
case PIX_FMT_BGR24 : conv = gray8aToPacked24; break;
}
} else if (usePal(srcFormat)) {
switch (dstFormat) {
case PIX_FMT_RGB32 : conv = sws_convertPalette8ToPacked32; break;
case PIX_FMT_BGR32 : conv = sws_convertPalette8ToPacked32; break;
case PIX_FMT_BGR32_1: conv = sws_convertPalette8ToPacked32; break;
case PIX_FMT_RGB32_1: conv = sws_convertPalette8ToPacked32; break;
case PIX_FMT_RGB24 : conv = sws_convertPalette8ToPacked24; break;
case PIX_FMT_BGR24 : conv = sws_convertPalette8ToPacked24; break;
}
}
if (!conv)
av_log(c, AV_LOG_ERROR, "internal error %s -> %s converter\n",
av_get_pix_fmt_name(srcFormat), av_get_pix_fmt_name(dstFormat));
else {
for (i = 0; i < srcSliceH; i++) {
conv(srcPtr, dstPtr, c->srcW, (uint8_t *) c->pal_rgb);
srcPtr += srcStride[0];
dstPtr += dstStride[0];
}
}
return srcSliceH;
}
static void gbr24ptopacked24(const uint8_t* src[], int srcStride[], uint8_t* dst, int dstStride, int srcSliceH, int width)
{
int x, h, i;
for (h = 0; h < srcSliceH; h++) {
uint8_t *dest = dst + dstStride * h;
for (x = 0; x < width; x++) {
*dest++ = src[0][x];
*dest++ = src[1][x];
*dest++ = src[2][x];
}
for (i = 0; i < 3; i++)
src[i] += srcStride[i];
}
}
static void gbr24ptopacked32(const uint8_t* src[], int srcStride[], uint8_t* dst, int dstStride, int srcSliceH, int alpha_first, int width)
{
int x, h, i;
for (h = 0; h < srcSliceH; h++) {
uint8_t *dest = dst + dstStride * h;
if (alpha_first) {
for (x = 0; x < width; x++) {
*dest++ = 0xff;
*dest++ = src[0][x];
*dest++ = src[1][x];
*dest++ = src[2][x];
}
} else {
for (x = 0; x < width; x++) {
*dest++ = src[0][x];
*dest++ = src[1][x];
*dest++ = src[2][x];
*dest++ = 0xff;
}
}
for (i = 0; i < 3; i++)
src[i] += srcStride[i];
}
}
static int planarRgbToRgbWrapper(SwsContext *c, const uint8_t* src[], int srcStride[], int srcSliceY,
int srcSliceH, uint8_t* dst[], int dstStride[])
{
int alpha_first = 0;
if (c->srcFormat != PIX_FMT_GBR24P) {
av_log(c, AV_LOG_ERROR, "unsupported planar RGB conversion %s -> %s\n",
av_get_pix_fmt_name(c->srcFormat), av_get_pix_fmt_name(c->dstFormat));
return srcSliceH;
}
switch (c->dstFormat) {
case PIX_FMT_BGR24:
gbr24ptopacked24((const uint8_t* []) {src[1], src[0], src[2]}, (int []) {srcStride[1], srcStride[0], srcStride[2]},
dst[0] + srcSliceY * dstStride[0], dstStride[0], srcSliceH, c->srcW);
break;
case PIX_FMT_RGB24:
gbr24ptopacked24((const uint8_t* []) {src[2], src[0], src[1]}, (int []) {srcStride[2], srcStride[0], srcStride[1]},
dst[0] + srcSliceY * dstStride[0], dstStride[0], srcSliceH, c->srcW);
break;
case PIX_FMT_ARGB:
alpha_first = 1;
case PIX_FMT_RGBA:
gbr24ptopacked32((const uint8_t* []) {src[2], src[0], src[1]}, (int []) {srcStride[2], srcStride[0], srcStride[1]},
dst[0] + srcSliceY * dstStride[0], dstStride[0], srcSliceH, alpha_first, c->srcW);
break;
case PIX_FMT_ABGR:
alpha_first = 1;
case PIX_FMT_BGRA:
gbr24ptopacked32((const uint8_t* []) {src[1], src[0], src[2]}, (int []) {srcStride[1], srcStride[0], srcStride[2]},
dst[0] + srcSliceY * dstStride[0], dstStride[0], srcSliceH, alpha_first, c->srcW);
break;
default:
av_log(c, AV_LOG_ERROR, "unsupported planar RGB conversion %s -> %s\n",
av_get_pix_fmt_name(c->srcFormat), av_get_pix_fmt_name(c->dstFormat));
}
return srcSliceH;
}
#define isRGBA32(x) ( \
(x) == PIX_FMT_ARGB \
|| (x) == PIX_FMT_RGBA \
|| (x) == PIX_FMT_BGRA \
|| (x) == PIX_FMT_ABGR \
)
/* {RGB,BGR}{15,16,24,32,32_1} -> {RGB,BGR}{15,16,24,32} */
typedef void (* rgbConvFn) (const uint8_t *, uint8_t *, int);
static rgbConvFn findRgbConvFn(SwsContext *c)
{
const enum PixelFormat srcFormat = c->srcFormat;
const enum PixelFormat dstFormat = c->dstFormat;
const int srcId = c->srcFormatBpp;
const int dstId = c->dstFormatBpp;
rgbConvFn conv = NULL;
#define IS_NOT_NE(bpp, fmt) \
(((bpp + 7) >> 3) == 2 && \
(!(av_pix_fmt_descriptors[fmt].flags & PIX_FMT_BE) != !HAVE_BIGENDIAN))
/* if this is non-native rgb444/555/565, don't handle it here. */
if (IS_NOT_NE(srcId, srcFormat) || IS_NOT_NE(dstId, dstFormat))
return NULL;
#define CONV_IS(src, dst) (srcFormat == PIX_FMT_##src && dstFormat == PIX_FMT_##dst)
if (isRGBA32(srcFormat) && isRGBA32(dstFormat)) {
if ( CONV_IS(ABGR, RGBA)
|| CONV_IS(ARGB, BGRA)
|| CONV_IS(BGRA, ARGB)
|| CONV_IS(RGBA, ABGR)) conv = shuffle_bytes_3210;
else if (CONV_IS(ABGR, ARGB)
|| CONV_IS(ARGB, ABGR)) conv = shuffle_bytes_0321;
else if (CONV_IS(ABGR, BGRA)
|| CONV_IS(ARGB, RGBA)) conv = shuffle_bytes_1230;
else if (CONV_IS(BGRA, RGBA)
|| CONV_IS(RGBA, BGRA)) conv = shuffle_bytes_2103;
else if (CONV_IS(BGRA, ABGR)
|| CONV_IS(RGBA, ARGB)) conv = shuffle_bytes_3012;
} else
/* BGR -> BGR */
if ((isBGRinInt(srcFormat) && isBGRinInt(dstFormat)) ||
(isRGBinInt(srcFormat) && isRGBinInt(dstFormat))) {
switch (srcId | (dstId << 16)) {
case 0x000F000C: conv = rgb12to15; break;
case 0x000F0010: conv = rgb16to15; break;
case 0x000F0018: conv = rgb24to15; break;
case 0x000F0020: conv = rgb32to15; break;
case 0x0010000F: conv = rgb15to16; break;
case 0x00100018: conv = rgb24to16; break;
case 0x00100020: conv = rgb32to16; break;
case 0x0018000F: conv = rgb15to24; break;
case 0x00180010: conv = rgb16to24; break;
case 0x00180020: conv = rgb32to24; break;
case 0x0020000F: conv = rgb15to32; break;
case 0x00200010: conv = rgb16to32; break;
case 0x00200018: conv = rgb24to32; break;
}
} else if ((isBGRinInt(srcFormat) && isRGBinInt(dstFormat)) ||
(isRGBinInt(srcFormat) && isBGRinInt(dstFormat))) {
switch (srcId | (dstId << 16)) {
case 0x000C000C: conv = rgb12tobgr12; break;
case 0x000F000F: conv = rgb15tobgr15; break;
case 0x000F0010: conv = rgb16tobgr15; break;
case 0x000F0018: conv = rgb24tobgr15; break;
case 0x000F0020: conv = rgb32tobgr15; break;
case 0x0010000F: conv = rgb15tobgr16; break;
case 0x00100010: conv = rgb16tobgr16; break;
case 0x00100018: conv = rgb24tobgr16; break;
case 0x00100020: conv = rgb32tobgr16; break;
case 0x0018000F: conv = rgb15tobgr24; break;
case 0x00180010: conv = rgb16tobgr24; break;
case 0x00180018: conv = rgb24tobgr24; break;
case 0x00180020: conv = rgb32tobgr24; break;
case 0x0020000F: conv = rgb15tobgr32; break;
case 0x00200010: conv = rgb16tobgr32; break;
case 0x00200018: conv = rgb24tobgr32; break;
}
}
return conv;
}
/* {RGB,BGR}{15,16,24,32,32_1} -> {RGB,BGR}{15,16,24,32} */
static int rgbToRgbWrapper(SwsContext *c, const uint8_t *src[], int srcStride[],
int srcSliceY, int srcSliceH, uint8_t *dst[],
int dstStride[])
{
const enum PixelFormat srcFormat = c->srcFormat;
const enum PixelFormat dstFormat = c->dstFormat;
const int srcBpp = (c->srcFormatBpp + 7) >> 3;
const int dstBpp = (c->dstFormatBpp + 7) >> 3;
rgbConvFn conv = findRgbConvFn(c);
if (!conv) {
av_log(c, AV_LOG_ERROR, "internal error %s -> %s converter\n",
av_get_pix_fmt_name(srcFormat), av_get_pix_fmt_name(dstFormat));
} else {
const uint8_t *srcPtr = src[0];
uint8_t *dstPtr = dst[0];
if ((srcFormat == PIX_FMT_RGB32_1 || srcFormat == PIX_FMT_BGR32_1) &&
!isRGBA32(dstFormat))
srcPtr += ALT32_CORR;
if ((dstFormat == PIX_FMT_RGB32_1 || dstFormat == PIX_FMT_BGR32_1) &&
!isRGBA32(srcFormat))
dstPtr += ALT32_CORR;
if (dstStride[0] * srcBpp == srcStride[0] * dstBpp && srcStride[0] > 0 &&
!(srcStride[0] % srcBpp))
conv(srcPtr, dstPtr + dstStride[0] * srcSliceY,
srcSliceH * srcStride[0]);
else {
int i;
dstPtr += dstStride[0] * srcSliceY;
for (i = 0; i < srcSliceH; i++) {
conv(srcPtr, dstPtr, c->srcW * srcBpp);
srcPtr += srcStride[0];
dstPtr += dstStride[0];
}
}
}
return srcSliceH;
}
static int bgr24ToYv12Wrapper(SwsContext *c, const uint8_t *src[],
int srcStride[], int srcSliceY, int srcSliceH,
uint8_t *dst[], int dstStride[])
{
rgb24toyv12(
src[0],
dst[0] + srcSliceY * dstStride[0],
dst[1] + (srcSliceY >> 1) * dstStride[1],
dst[2] + (srcSliceY >> 1) * dstStride[2],
c->srcW, srcSliceH,
dstStride[0], dstStride[1], srcStride[0]);
if (dst[3])
fillPlane(dst[3], dstStride[3], c->srcW, srcSliceH, srcSliceY, 255);
return srcSliceH;
}
static int yvu9ToYv12Wrapper(SwsContext *c, const uint8_t *src[],
int srcStride[], int srcSliceY, int srcSliceH,
uint8_t *dst[], int dstStride[])
{
copyPlane(src[0], srcStride[0], srcSliceY, srcSliceH, c->srcW,
dst[0], dstStride[0]);
planar2x(src[1], dst[1] + dstStride[1] * (srcSliceY >> 1), c->chrSrcW,
srcSliceH >> 2, srcStride[1], dstStride[1]);
planar2x(src[2], dst[2] + dstStride[2] * (srcSliceY >> 1), c->chrSrcW,
srcSliceH >> 2, srcStride[2], dstStride[2]);
if (dst[3])
fillPlane(dst[3], dstStride[3], c->srcW, srcSliceH, srcSliceY, 255);
return srcSliceH;
}
/* unscaled copy like stuff (assumes nearly identical formats) */
static int packedCopyWrapper(SwsContext *c, const uint8_t *src[],
int srcStride[], int srcSliceY, int srcSliceH,
uint8_t *dst[], int dstStride[])
{
if (dstStride[0] == srcStride[0] && srcStride[0] > 0)
memcpy(dst[0] + dstStride[0] * srcSliceY, src[0], srcSliceH * dstStride[0]);
else {
int i;
const uint8_t *srcPtr = src[0];
uint8_t *dstPtr = dst[0] + dstStride[0] * srcSliceY;
int length = 0;
/* universal length finder */
while (length + c->srcW <= FFABS(dstStride[0]) &&
length + c->srcW <= FFABS(srcStride[0]))
length += c->srcW;
assert(length != 0);
for (i = 0; i < srcSliceH; i++) {
memcpy(dstPtr, srcPtr, length);
srcPtr += srcStride[0];
dstPtr += dstStride[0];
}
}
return srcSliceH;
}
#define DITHER_COPY(dst, dstStride, src, srcStride, bswap, dbswap)\
uint16_t scale= dither_scale[dst_depth-1][src_depth-1];\
int shift= src_depth-dst_depth + dither_scale[src_depth-2][dst_depth-1];\
for (i = 0; i < height; i++) {\
const uint8_t *dither= dithers[src_depth-9][i&7];\
for (j = 0; j < length-7; j+=8){\
dst[j+0] = dbswap((bswap(src[j+0]) + dither[0])*scale>>shift);\
dst[j+1] = dbswap((bswap(src[j+1]) + dither[1])*scale>>shift);\
dst[j+2] = dbswap((bswap(src[j+2]) + dither[2])*scale>>shift);\
dst[j+3] = dbswap((bswap(src[j+3]) + dither[3])*scale>>shift);\
dst[j+4] = dbswap((bswap(src[j+4]) + dither[4])*scale>>shift);\
dst[j+5] = dbswap((bswap(src[j+5]) + dither[5])*scale>>shift);\
dst[j+6] = dbswap((bswap(src[j+6]) + dither[6])*scale>>shift);\
dst[j+7] = dbswap((bswap(src[j+7]) + dither[7])*scale>>shift);\
}\
for (; j < length; j++)\
dst[j] = dbswap((bswap(src[j]) + dither[j&7])*scale>>shift);\
dst += dstStride;\
src += srcStride;\
}
static int planarCopyWrapper(SwsContext *c, const uint8_t *src[],
int srcStride[], int srcSliceY, int srcSliceH,
uint8_t *dst[], int dstStride[])
{
int plane, i, j;
for (plane = 0; plane < 4; plane++) {
int length = (plane == 0 || plane == 3) ? c->srcW : -((-c->srcW ) >> c->chrDstHSubSample);
int y = (plane == 0 || plane == 3) ? srcSliceY: -((-srcSliceY) >> c->chrDstVSubSample);
int height = (plane == 0 || plane == 3) ? srcSliceH: -((-srcSliceH) >> c->chrDstVSubSample);
const uint8_t *srcPtr = src[plane];
uint8_t *dstPtr = dst[plane] + dstStride[plane] * y;
int shiftonly= plane==1 || plane==2 || (!c->srcRange && plane==0);
if (!dst[plane])
continue;
// ignore palette for GRAY8
if (plane == 1 && !dst[2]) continue;
if (!src[plane] || (plane == 1 && !src[2])) {
if (is16BPS(c->dstFormat))
length *= 2;
fillPlane(dst[plane], dstStride[plane], length, height, y,
(plane == 3) ? 255 : 128);
} else {
if(isNBPS(c->srcFormat) || isNBPS(c->dstFormat)
|| (is16BPS(c->srcFormat) != is16BPS(c->dstFormat))
) {
const int src_depth = av_pix_fmt_descriptors[c->srcFormat].comp[plane].depth_minus1 + 1;
const int dst_depth = av_pix_fmt_descriptors[c->dstFormat].comp[plane].depth_minus1 + 1;
const uint16_t *srcPtr2 = (const uint16_t *) srcPtr;
uint16_t *dstPtr2 = (uint16_t*)dstPtr;
if (dst_depth == 8) {
if(isBE(c->srcFormat) == HAVE_BIGENDIAN){
DITHER_COPY(dstPtr, dstStride[plane], srcPtr2, srcStride[plane]/2, , )
} else {
DITHER_COPY(dstPtr, dstStride[plane], srcPtr2, srcStride[plane]/2, av_bswap16, )
}
} else if (src_depth == 8) {
for (i = 0; i < height; i++) {
#define COPY816(w)\
if(shiftonly){\
for (j = 0; j < length; j++)\
w(&dstPtr2[j], srcPtr[j]<<(dst_depth-8));\
}else{\
for (j = 0; j < length; j++)\
w(&dstPtr2[j], (srcPtr[j]<<(dst_depth-8)) |\
(srcPtr[j]>>(2*8-dst_depth)));\
}
if(isBE(c->dstFormat)){
COPY816(AV_WB16)
} else {
COPY816(AV_WL16)
}
dstPtr2 += dstStride[plane]/2;
srcPtr += srcStride[plane];
}
} else if (src_depth <= dst_depth) {
for (i = 0; i < height; i++) {
#define COPY_UP(r,w) \
if(shiftonly){\
for (j = 0; j < length; j++){ \
unsigned int v= r(&srcPtr2[j]);\
w(&dstPtr2[j], v<<(dst_depth-src_depth));\
}\
}else{\
for (j = 0; j < length; j++){ \
unsigned int v= r(&srcPtr2[j]);\
w(&dstPtr2[j], (v<<(dst_depth-src_depth)) | \
(v>>(2*src_depth-dst_depth)));\
}\
}
if(isBE(c->srcFormat)){
if(isBE(c->dstFormat)){
COPY_UP(AV_RB16, AV_WB16)
} else {
COPY_UP(AV_RB16, AV_WL16)
}
} else {
if(isBE(c->dstFormat)){
COPY_UP(AV_RL16, AV_WB16)
} else {
COPY_UP(AV_RL16, AV_WL16)
}
}
dstPtr2 += dstStride[plane]/2;
srcPtr2 += srcStride[plane]/2;
}
} else {
if(isBE(c->srcFormat) == HAVE_BIGENDIAN){
if(isBE(c->dstFormat) == HAVE_BIGENDIAN){
DITHER_COPY(dstPtr2, dstStride[plane]/2, srcPtr2, srcStride[plane]/2, , )
} else {
DITHER_COPY(dstPtr2, dstStride[plane]/2, srcPtr2, srcStride[plane]/2, , av_bswap16)
}
}else{
if(isBE(c->dstFormat) == HAVE_BIGENDIAN){
DITHER_COPY(dstPtr2, dstStride[plane]/2, srcPtr2, srcStride[plane]/2, av_bswap16, )
} else {
DITHER_COPY(dstPtr2, dstStride[plane]/2, srcPtr2, srcStride[plane]/2, av_bswap16, av_bswap16)
}
}
}
} else if (is16BPS(c->srcFormat) && is16BPS(c->dstFormat) &&
isBE(c->srcFormat) != isBE(c->dstFormat)) {
for (i = 0; i < height; i++) {
for (j = 0; j < length; j++)
((uint16_t *) dstPtr)[j] = av_bswap16(((const uint16_t *) srcPtr)[j]);
srcPtr += srcStride[plane];
dstPtr += dstStride[plane];
}
} else if (dstStride[plane] == srcStride[plane] &&
srcStride[plane] > 0 && srcStride[plane] == length) {
memcpy(dst[plane] + dstStride[plane] * y, src[plane],
height * dstStride[plane]);
} else {
if (is16BPS(c->srcFormat) && is16BPS(c->dstFormat))
length *= 2;
else if (!av_pix_fmt_descriptors[c->srcFormat].comp[0].depth_minus1)
length >>= 3; // monowhite/black
for (i = 0; i < height; i++) {
memcpy(dstPtr, srcPtr, length);
srcPtr += srcStride[plane];
dstPtr += dstStride[plane];
}
}
}
}
return srcSliceH;
}
#define IS_DIFFERENT_ENDIANESS(src_fmt, dst_fmt, pix_fmt) \
((src_fmt == pix_fmt ## BE && dst_fmt == pix_fmt ## LE) || \
(src_fmt == pix_fmt ## LE && dst_fmt == pix_fmt ## BE))
void ff_get_unscaled_swscale(SwsContext *c)
{
const enum PixelFormat srcFormat = c->srcFormat;
const enum PixelFormat dstFormat = c->dstFormat;
const int flags = c->flags;
const int dstH = c->dstH;
int needsDither;
needsDither = isAnyRGB(dstFormat) &&
c->dstFormatBpp < 24 &&
(c->dstFormatBpp < c->srcFormatBpp || (!isAnyRGB(srcFormat)));
/* yv12_to_nv12 */
if ((srcFormat == PIX_FMT_YUV420P || srcFormat == PIX_FMT_YUVA420P) &&
(dstFormat == PIX_FMT_NV12 || dstFormat == PIX_FMT_NV21)) {
c->swScale = planarToNv12Wrapper;
}
/* yuv2bgr */
if ((srcFormat == PIX_FMT_YUV420P || srcFormat == PIX_FMT_YUV422P ||
srcFormat == PIX_FMT_YUVA420P) && isAnyRGB(dstFormat) &&
!(flags & SWS_ACCURATE_RND) && !(dstH & 1)) {
c->swScale = ff_yuv2rgb_get_func_ptr(c);
}
if (srcFormat == PIX_FMT_YUV410P &&
(dstFormat == PIX_FMT_YUV420P || dstFormat == PIX_FMT_YUVA420P) &&
!(flags & SWS_BITEXACT)) {
c->swScale = yvu9ToYv12Wrapper;
}
/* bgr24toYV12 */
if (srcFormat == PIX_FMT_BGR24 &&
(dstFormat == PIX_FMT_YUV420P || dstFormat == PIX_FMT_YUVA420P) &&
!(flags & SWS_ACCURATE_RND))
c->swScale = bgr24ToYv12Wrapper;
/* RGB/BGR -> RGB/BGR (no dither needed forms) */
if (isAnyRGB(srcFormat) && isAnyRGB(dstFormat) && findRgbConvFn(c)
&& (!needsDither || (c->flags&(SWS_FAST_BILINEAR|SWS_POINT))))
c->swScale= rgbToRgbWrapper;
#define isByteRGB(f) (\
f == PIX_FMT_RGB32 ||\
f == PIX_FMT_RGB32_1 ||\
f == PIX_FMT_RGB24 ||\
f == PIX_FMT_BGR32 ||\
f == PIX_FMT_BGR32_1 ||\
f == PIX_FMT_BGR24)
if (isAnyRGB(srcFormat) && isPlanar(srcFormat) && isByteRGB(dstFormat))
c->swScale= planarRgbToRgbWrapper;
/* bswap 16 bits per pixel/component packed formats */
if (IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, PIX_FMT_BGR444) ||
IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, PIX_FMT_BGR48) ||
IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, PIX_FMT_BGR555) ||
IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, PIX_FMT_BGR565) ||
IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, PIX_FMT_GRAY16) ||
IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, PIX_FMT_RGB444) ||
IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, PIX_FMT_RGB48) ||
IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, PIX_FMT_RGB555) ||
IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, PIX_FMT_RGB565))
c->swScale = packed_16bpc_bswap;
if (usePal(srcFormat) && isByteRGB(dstFormat))
c->swScale = palToRgbWrapper;
if (srcFormat == PIX_FMT_YUV422P) {
if (dstFormat == PIX_FMT_YUYV422)
c->swScale = yuv422pToYuy2Wrapper;
else if (dstFormat == PIX_FMT_UYVY422)
c->swScale = yuv422pToUyvyWrapper;
}
/* LQ converters if -sws 0 or -sws 4*/
if (c->flags&(SWS_FAST_BILINEAR|SWS_POINT)) {
/* yv12_to_yuy2 */
if (srcFormat == PIX_FMT_YUV420P || srcFormat == PIX_FMT_YUVA420P) {
if (dstFormat == PIX_FMT_YUYV422)
c->swScale = planarToYuy2Wrapper;
else if (dstFormat == PIX_FMT_UYVY422)
c->swScale = planarToUyvyWrapper;
}
}
if (srcFormat == PIX_FMT_YUYV422 &&
(dstFormat == PIX_FMT_YUV420P || dstFormat == PIX_FMT_YUVA420P))
c->swScale = yuyvToYuv420Wrapper;
if (srcFormat == PIX_FMT_UYVY422 &&
(dstFormat == PIX_FMT_YUV420P || dstFormat == PIX_FMT_YUVA420P))
c->swScale = uyvyToYuv420Wrapper;
if (srcFormat == PIX_FMT_YUYV422 && dstFormat == PIX_FMT_YUV422P)
c->swScale = yuyvToYuv422Wrapper;
if (srcFormat == PIX_FMT_UYVY422 && dstFormat == PIX_FMT_YUV422P)
c->swScale = uyvyToYuv422Wrapper;
#define isPlanarGray(x) (isGray(x) && (x) != PIX_FMT_GRAY8A)
/* simple copy */
if ( srcFormat == dstFormat ||
(srcFormat == PIX_FMT_YUVA420P && dstFormat == PIX_FMT_YUV420P) ||
(srcFormat == PIX_FMT_YUV420P && dstFormat == PIX_FMT_YUVA420P) ||
(isPlanarYUV(srcFormat) && isPlanarGray(dstFormat)) ||
(isPlanarYUV(dstFormat) && isPlanarGray(srcFormat)) ||
(isPlanarGray(dstFormat) && isPlanarGray(srcFormat)) ||
(isPlanarYUV(srcFormat) && isPlanarYUV(dstFormat) &&
c->chrDstHSubSample == c->chrSrcHSubSample &&
c->chrDstVSubSample == c->chrSrcVSubSample &&
dstFormat != PIX_FMT_NV12 && dstFormat != PIX_FMT_NV21 &&
srcFormat != PIX_FMT_NV12 && srcFormat != PIX_FMT_NV21))
{
if (isPacked(c->srcFormat))
c->swScale = packedCopyWrapper;
else /* Planar YUV or gray */
c->swScale = planarCopyWrapper;
}
if (ARCH_BFIN)
ff_bfin_get_unscaled_swscale(c);
if (HAVE_ALTIVEC)
ff_swscale_get_unscaled_altivec(c);
}
static void reset_ptr(const uint8_t *src[], int format)
{
if (!isALPHA(format))
src[3] = NULL;
if (!isPlanar(format)) {
src[3] = src[2] = NULL;
if (!usePal(format))
src[1] = NULL;
}
}
static int check_image_pointers(const uint8_t * const data[4], enum PixelFormat pix_fmt,
const int linesizes[4])
{
const AVPixFmtDescriptor *desc = &av_pix_fmt_descriptors[pix_fmt];
int i;
for (i = 0; i < 4; i++) {
int plane = desc->comp[i].plane;
if (!data[plane] || !linesizes[plane])
return 0;
}
return 1;
}
/**
* swscale wrapper, so we don't need to export the SwsContext.
* Assumes planar YUV to be in YUV order instead of YVU.
*/
int attribute_align_arg sws_scale(struct SwsContext *c,
const uint8_t * const srcSlice[],
const int srcStride[], int srcSliceY,
int srcSliceH, uint8_t *const dst[],
const int dstStride[])
{
int i;
const uint8_t *src2[4] = { srcSlice[0], srcSlice[1], srcSlice[2], srcSlice[3] };
uint8_t *dst2[4] = { dst[0], dst[1], dst[2], dst[3] };
// do not mess up sliceDir if we have a "trailing" 0-size slice
if (srcSliceH == 0)
return 0;
if (!check_image_pointers(srcSlice, c->srcFormat, srcStride)) {
av_log(c, AV_LOG_ERROR, "bad src image pointers\n");
return 0;
}
if (!check_image_pointers((const uint8_t* const*)dst, c->dstFormat, dstStride)) {
av_log(c, AV_LOG_ERROR, "bad dst image pointers\n");
return 0;
}
if (c->sliceDir == 0 && srcSliceY != 0 && srcSliceY + srcSliceH != c->srcH) {
av_log(c, AV_LOG_ERROR, "Slices start in the middle!\n");
return 0;
}
if (c->sliceDir == 0) {
if (srcSliceY == 0) c->sliceDir = 1; else c->sliceDir = -1;
}
if (usePal(c->srcFormat)) {
for (i = 0; i < 256; i++) {
int p, r, g, b, y, u, v, a = 0xff;
if (c->srcFormat == PIX_FMT_PAL8) {
p = ((const uint32_t *)(srcSlice[1]))[i];
a = (p >> 24) & 0xFF;
r = (p >> 16) & 0xFF;
g = (p >> 8) & 0xFF;
b = p & 0xFF;
} else if (c->srcFormat == PIX_FMT_RGB8) {
r = ( i >> 5 ) * 36;
g = ((i >> 2) & 7) * 36;
b = ( i & 3) * 85;
} else if (c->srcFormat == PIX_FMT_BGR8) {
b = ( i >> 6 ) * 85;
g = ((i >> 3) & 7) * 36;
r = ( i & 7) * 36;
} else if (c->srcFormat == PIX_FMT_RGB4_BYTE) {
r = ( i >> 3 ) * 255;
g = ((i >> 1) & 3) * 85;
b = ( i & 1) * 255;
} else if (c->srcFormat == PIX_FMT_GRAY8 || c->srcFormat == PIX_FMT_GRAY8A) {
r = g = b = i;
} else {
assert(c->srcFormat == PIX_FMT_BGR4_BYTE);
b = ( i >> 3 ) * 255;
g = ((i >> 1) & 3) * 85;
r = ( i & 1) * 255;
}
y = av_clip_uint8((RY * r + GY * g + BY * b + ( 33 << (RGB2YUV_SHIFT - 1))) >> RGB2YUV_SHIFT);
u = av_clip_uint8((RU * r + GU * g + BU * b + (257 << (RGB2YUV_SHIFT - 1))) >> RGB2YUV_SHIFT);
v = av_clip_uint8((RV * r + GV * g + BV * b + (257 << (RGB2YUV_SHIFT - 1))) >> RGB2YUV_SHIFT);
c->pal_yuv[i]= y + (u<<8) + (v<<16) + (a<<24);
switch (c->dstFormat) {
case PIX_FMT_BGR32:
#if !HAVE_BIGENDIAN
case PIX_FMT_RGB24:
#endif
c->pal_rgb[i]= r + (g<<8) + (b<<16) + (a<<24);
break;
case PIX_FMT_BGR32_1:
#if HAVE_BIGENDIAN
case PIX_FMT_BGR24:
#endif
c->pal_rgb[i]= a + (r<<8) + (g<<16) + (b<<24);
break;
case PIX_FMT_RGB32_1:
#if HAVE_BIGENDIAN
case PIX_FMT_RGB24:
#endif
c->pal_rgb[i]= a + (b<<8) + (g<<16) + (r<<24);
break;
case PIX_FMT_RGB32:
#if !HAVE_BIGENDIAN
case PIX_FMT_BGR24:
#endif
default:
c->pal_rgb[i]= b + (g<<8) + (r<<16) + (a<<24);
}
}
}
// copy strides, so they can safely be modified
if (c->sliceDir == 1) {
// slices go from top to bottom
int srcStride2[4] = { srcStride[0], srcStride[1], srcStride[2],
srcStride[3] };
int dstStride2[4] = { dstStride[0], dstStride[1], dstStride[2],
dstStride[3] };
reset_ptr(src2, c->srcFormat);
reset_ptr((void*)dst2, c->dstFormat);
/* reset slice direction at end of frame */
if (srcSliceY + srcSliceH == c->srcH)
c->sliceDir = 0;
return c->swScale(c, src2, srcStride2, srcSliceY, srcSliceH, dst2,
dstStride2);
} else {
// slices go from bottom to top => we flip the image internally
int srcStride2[4] = { -srcStride[0], -srcStride[1], -srcStride[2],
-srcStride[3] };
int dstStride2[4] = { -dstStride[0], -dstStride[1], -dstStride[2],
-dstStride[3] };
src2[0] += (srcSliceH - 1) * srcStride[0];
if (!usePal(c->srcFormat))
src2[1] += ((srcSliceH >> c->chrSrcVSubSample) - 1) * srcStride[1];
src2[2] += ((srcSliceH >> c->chrSrcVSubSample) - 1) * srcStride[2];
src2[3] += (srcSliceH - 1) * srcStride[3];
dst2[0] += ( c->dstH - 1) * dstStride[0];
dst2[1] += ((c->dstH >> c->chrDstVSubSample) - 1) * dstStride[1];
dst2[2] += ((c->dstH >> c->chrDstVSubSample) - 1) * dstStride[2];
dst2[3] += ( c->dstH - 1) * dstStride[3];
reset_ptr(src2, c->srcFormat);
reset_ptr((void*)dst2, c->dstFormat);
/* reset slice direction at end of frame */
if (!srcSliceY)
c->sliceDir = 0;
return c->swScale(c, src2, srcStride2, c->srcH-srcSliceY-srcSliceH,
srcSliceH, dst2, dstStride2);
}
}
/* Convert the palette to the same packed 32-bit format as the palette */
void sws_convertPalette8ToPacked32(const uint8_t *src, uint8_t *dst,
int num_pixels, const uint8_t *palette)
{
int i;
for (i = 0; i < num_pixels; i++)
((uint32_t *) dst)[i] = ((const uint32_t *) palette)[src[i]];
}
/* Palette format: ABCD -> dst format: ABC */
void sws_convertPalette8ToPacked24(const uint8_t *src, uint8_t *dst,
int num_pixels, const uint8_t *palette)
{
int i;
for (i = 0; i < num_pixels; i++) {
//FIXME slow?
dst[0] = palette[src[i] * 4 + 0];
dst[1] = palette[src[i] * 4 + 1];
dst[2] = palette[src[i] * 4 + 2];
dst += 3;
}
}
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