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frame.c
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frame.c
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/*! @file frame.c
* @brief
*
* @version 1.0.0
*
* (C) Copyright 2017 GoPro Inc (http://gopro.com/).
*
* Licensed under either:
* - Apache License, Version 2.0, http://www.apache.org/licenses/LICENSE-2.0
* - MIT license, http://opensource.org/licenses/MIT
* at your option.
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
//#include <stdint.h>
#include "stdint.h" // Use a local copy until this file is available on Windows
#include <string.h>
#include <assert.h>
#include <math.h>
#include <emmintrin.h> // SSE2 intrinsics
#include "config.h"
#include "frame.h"
#include "wavelet.h"
#include "color.h"
#include "timing.h"
#include "convert.h"
#include "decoder.h"
#include "swap.h"
#include "RGB2YUV.h"
#include <stdlib.h>
#include <stdio.h>
#define DEBUG (1 && _DEBUG)
#define TIMING (1 && _TIMING)
#define XMMOPT (1 && _XMMOPT)
// Performance measurements
#if TIMING
extern TIMER tk_convert; // Time for image format conversion
extern COUNTER alloc_frame_count; // Number of frames allocated
#endif
#ifndef DEBUG
#define DEBUG (1 && _DEBUG)
#endif
#if _ENABLE_GAMMA_CORRECTION // Color conversion macros
#include "gamma_table.inc"
#endif
#define COLOR_CONVERSION_16BITS 1 // Use 16-bit fixed point for color conversion
#define INTERPOLATE_CHROMA 0 // This caused shear in multi-generation tests
#define YU16_MAX 65535 // Maximum for 16 bit pixels
#define YU10_MAX 1023 // maximum for 10 bit pixels
#define SATURATE_10U(x) _saturate10u(x)
#define SATURATE_12U(x) _saturate12u(x)
#if 0
#ifdef _WIN32
#include <stdlib.h>
// Use the byte swapping routines defined in the standard library
#ifndef SwapInt16
#define SwapInt16(x) _byteswap_ushort(x)
#endif
#ifndef SwapInt32
#define SwapInt32(x) _byteswap_ulong(x)
#endif
#elif __APPLE__
#include "CoreFoundation/CoreFoundation.h"
// Use the byte swapping routines from the Core Foundation framework
#define SwapInt16(x) _OSSwapInt16(x)
#define SwapInt32(x) _OSSwapInt32(x)
#else
#define SwapInt32(x) _builtin_bswap32(x)
#endif
#else
#include "swap.h"
#endif
//TODO: Replace uses of _bswap with SwapInt32
#if __APPLE__
#include "macdefs.h"
#else
#ifndef CopyMemory
#define CopyMemory(p,q,s) memcpy(p,q,s)
#endif
#endif
typedef union
{
unsigned long long u64[2];
long long s64[2];
unsigned int u32[4];
int s32[4];
unsigned short u16[8];
short s16[8];
unsigned char u8[16];
char s8[16];
__m128i m128;
} m128i;
INLINE static int _saturate10u(int x)
{
const int upper_limit = 1023;
if (x < 0) x = 0;
else
if (x > upper_limit) x = upper_limit;
return x;
}
INLINE static int _saturate12u(int x)
{
const int upper_limit = 4095;
if (x < 0) x = 0;
else
if (x > upper_limit) x = upper_limit;
return x;
}
#if _ALLOCATOR
FRAME *CreateFrame(ALLOCATOR *allocator, int width, int height, int display_height, int format)
#else
FRAME *CreateFrame(int width, int height, int display_height, int format)
#endif
{
int chroma_width, chroma_height;
#if _ALLOCATOR
FRAME *frame = (FRAME *)Alloc(allocator, sizeof(FRAME));
#else
FRAME *frame = (FRAME *)MEMORY_ALLOC(sizeof(FRAME));
#endif
if (frame == NULL)
{
#if (DEBUG && _WIN32)
OutputDebugString("sizeof(FRAME)");
#endif
return NULL;
}
// Clear all fields in the frame
memset(frame, 0, sizeof(FRAME));
if (format == FRAME_FORMAT_GRAY)
{
frame->num_channels = 1;
#if _ALLOCATOR
frame->channel[0] = CreateImage(allocator, width, height);
#else
frame->channel[0] = CreateImage(width, height);
#endif
}
else if(format == FRAME_FORMAT_YUV)
{
// Currently only handle color frames in YUV format
assert(format == FRAME_FORMAT_YUV);
frame->num_channels = 3;
#if _ALLOCATOR
frame->channel[0] = CreateImage(allocator, width, height);
#else
frame->channel[0] = CreateImage(width, height);
#endif
#if _YUV422
chroma_width = width / 2;
chroma_height = height;
#if _ALLOCATOR
frame->channel[1] = CreateImage(allocator, chroma_width, chroma_height);
frame->channel[2] = CreateImage(allocator, chroma_width, chroma_height);
#else
frame->channel[1] = CreateImage(chroma_width, chroma_height);
frame->channel[2] = CreateImage(chroma_width, chroma_height);
#endif
#else
#if _ALLOCATOR
frame->channel[1] = CreateImage(allocator, width, height);
frame->channel[2] = CreateImage(allocator, width, height);
#else
frame->channel[1] = CreateImage(width, height);
frame->channel[2] = CreateImage(width, height);
#endif
#endif
}
else if(format == FRAME_FORMAT_RGBA)
{
frame->num_channels = 4;
#if _ALLOCATOR
frame->channel[0] = CreateImage(allocator, width, height);
frame->channel[1] = CreateImage(allocator, width, height);
frame->channel[2] = CreateImage(allocator, width, height);
frame->channel[3] = CreateImage(allocator, width, height);
#else
frame->channel[0] = CreateImage(width, height);
frame->channel[1] = CreateImage(width, height);
frame->channel[2] = CreateImage(width, height);
frame->channel[3] = CreateImage(width, height);
#endif
}
else if(format == FRAME_FORMAT_RGB)
{
frame->num_channels = 3;
#if _ALLOCATOR
frame->channel[0] = CreateImage(allocator, width, height);
frame->channel[1] = CreateImage(allocator, width, height);
frame->channel[2] = CreateImage(allocator, width, height);
#else
frame->channel[0] = CreateImage(width, height);
frame->channel[1] = CreateImage(width, height);
frame->channel[2] = CreateImage(width, height);
#endif
}
// Save the frame dimensions and format
frame->width = width;
frame->height = height;
frame->display_height = display_height;
frame->format = format;
// Assume that this is not a key frame
frame->iskey = false;
#if TIMING
alloc_frame_count++;
#endif
return frame;
}
#if _ALLOCATOR
FRAME *ReallocFrame(ALLOCATOR *allocator, FRAME *frame, int width, int height, int display_height, int format)
#else
FRAME *ReallocFrame(FRAME *frame, int width, int height, int display_height, int format)
#endif
{
if (frame != NULL)
{
if (frame->width == width &&
frame->height == height &&
frame->format == format &&
frame->display_height == display_height) {
return frame;
}
#if _ALLOCATOR
DeleteFrame(allocator, frame);
#else
DeleteFrame(frame);
#endif
}
#if _ALLOCATOR
return CreateFrame(allocator, width, height, display_height, format);
#else
return CreateFrame(width, height, display_height, format);
#endif
}
// Set the frame dimensions without allocating memory for the planes
void SetFrameDimensions(FRAME *frame, int width, int height, int display_height, int format)
{
//int chroma_width;
//int chroma_height;
// Clear all fields in the frame
memset(frame, 0, sizeof(FRAME));
switch (format)
{
case FRAME_FORMAT_GRAY:
frame->num_channels = 1;
break;
case FRAME_FORMAT_YUV:
frame->num_channels = 3;
break;
case FRAME_FORMAT_RGBA:
frame->num_channels = 4;
break;
case FRAME_FORMAT_RGB:
frame->num_channels = 3;
break;
}
// Save the frame dimensions and format
frame->width = width;
frame->height = height;
frame->display_height = display_height;
frame->format = format;
// Assume that this is not a key frame
frame->iskey = false;
}
// Create a frame with the same dimensions and format as another frame
#if _ALLOCATOR
FRAME *CreateFrameFromFrame(ALLOCATOR *allocator, FRAME *frame)
#else
FRAME *CreateFrameFromFrame(FRAME *frame)
#endif
{
IMAGE *image = frame->channel[0];
int width = image->width;
int height = image->height;
int display_height = frame->display_height;
// Note: This code should be extended to duplicate the bands
#if _ALLOCATOR
FRAME *new_frame = CreateFrame(allocator, width, height, display_height, frame->format);
#else
FRAME *new_frame = CreateFrame(width, height, display_height, frame->format);
#endif
return new_frame;
}
#if 0
// Create an image data structure from planar video frame data
FRAME *CreateFrameFromPlanes(ALLOCATOR *allocator, LPBYTE data, int width, int height, int pitch, int format)
{
// To be written
assert(0);
return NULL;
}
#endif
void ConvertPackedToFrame(uint8_t *data, int width, int height, int pitch, FRAME *frame)
{
IMAGE *image = frame->channel[0];
uint8_t *rowptr = data;
PIXEL *outptr = image->band[0];
int data_pitch = pitch;
int image_pitch = image->pitch/sizeof(PIXEL);
int row, column;
for (row = 0; row < height; row++) {
for (column = 0; column < width; column++) {
PIXEL value = rowptr[2 * column];
outptr[column] = SATURATE(value);
}
rowptr += data_pitch;
outptr += image_pitch;
}
}
// Faster version of ConvertRGBToFrame8uNoIPP using MMX intrinsics
void ConvertRGB32to10bitYUVFrame(uint8_t *rgb, int pitch, FRAME *frame, uint8_t *scratch, int scratchsize, int color_space,
int precision, int srcHasAlpha, int rgbaswap)
{
ROI roi;
int display_height,height,width;
int shift = 6; // using 10-bit math
assert(MIN_DECODED_COLOR_SPACE <= color_space && color_space <= MAX_DECODED_COLOR_SPACE);
{
PIXEL8U *RGB_row;
unsigned short *color_plane[3];
int color_pitch[3];
PIXEL8U *Y_row, *U_row, *V_row;
PIXEL *Y_row16, *U_row16, *V_row16;
int Y_pitch, U_pitch, V_pitch;
int row;
int i;
//int precisionshift = 10 - precision;
unsigned short *scanline, *scanline2;
// The frame format should be three channels of YUV (4:2:2 format)
assert(frame->num_channels == 3);
assert(frame->format == FRAME_FORMAT_YUV);
display_height = frame->display_height;
height = frame->height;
width = frame->width;
assert(scratch);
assert(scratchsize > width * 12);
scanline = (unsigned short *)scratch;
scanline2 = scanline + width*3;
// Get pointers to the image planes and set the pitch for each plane
for (i = 0; i < 3; i++) {
IMAGE *image = frame->channel[i];
// Set the pointer to the individual planes and pitch for each channel
color_plane[i] = (PIXEL16U *)image->band[0];
color_pitch[i] = image->pitch;
// The first channel establishes the processing dimensions
if (i == 0) {
roi.width = image->width;
roi.height = image->height;
}
}
// Input RGB image is upside down so reverse it
// by starting from the end of the image and going back
RGB_row = &rgb[0];
RGB_row += (display_height - 1) * pitch;
pitch = -pitch;
//U and V are swapped
{
PIXEL16U *t = color_plane[1];
color_plane[1] = color_plane[2];
color_plane[2] = t;
}
Y_row = (PIXEL8U *)color_plane[0]; Y_pitch = color_pitch[0];
U_row = (PIXEL8U *)color_plane[1]; U_pitch = color_pitch[1];
V_row = (PIXEL8U *)color_plane[2]; V_pitch = color_pitch[2];
for (row = 0; row < display_height; row++)
{
//int column = 0;
if(srcHasAlpha)
{
if(rgbaswap)
ChunkyARGB8toPlanarRGB16((unsigned char *)RGB_row, scanline, width);
else
ChunkyBGRA8toPlanarRGB16((unsigned char *)RGB_row, scanline, width);
}
else
ChunkyBGR8toPlanarRGB16((unsigned char *)RGB_row, scanline, width);
PlanarRGB16toPlanarYUV16(scanline, scanline2, width, color_space);
PlanarYUV16toChannelYUYV16(scanline2, (unsigned short **)color_plane, width, color_space, shift);
// Advance the RGB pointers
RGB_row += pitch;
// Advance the YUV pointers
Y_row += Y_pitch;
U_row += U_pitch;
V_row += V_pitch;
color_plane[0] = (PIXEL16U*)Y_row;
color_plane[1] = (PIXEL16U*)U_row;
color_plane[2] = (PIXEL16U*)V_row;
}
for (; row < height; row++)
{
int column = 0;
#if (1 && XMMOPT)
int column_step = 16;
int post_column = roi.width - (roi.width % column_step);
__m128i *Y_ptr = (__m128i *)Y_row;
__m128i *U_ptr = (__m128i *)U_row;
__m128i *V_ptr = (__m128i *)V_row;
__m128i Y = _mm_set1_epi16(64);
__m128i UV = _mm_set1_epi16(512);
// Convert to YUYV in sets of 2 pixels
for(; column < post_column; column += column_step)
{
*Y_ptr++ = Y;
*Y_ptr++ = Y;
*U_ptr++ = UV;
*V_ptr++ = UV;
}
#endif
// Process the rest of the column
Y_row16 = (PIXEL *)Y_row;
U_row16 = (PIXEL *)U_row;
V_row16 = (PIXEL *)V_row;
for(; column < roi.width; column += 2)
{
int Y = 64, UV = 512;
Y_row16[column] = Y;
U_row16[column/2] = UV;
V_row16[column/2] = UV;
Y_row16[column+1] = Y;
}
// Advance the YUV pointers
Y_row += Y_pitch;
U_row += U_pitch;
V_row += V_pitch;
}
// Set the image parameters for each channel
for (i = 0; i < 3; i++)
{
IMAGE *image = frame->channel[i];
int band;
// Set the image scale
for (band = 0; band < IMAGE_NUM_BANDS; band++)
image->scale[band] = 1;
// Set the pixel type
image->pixel_type[0] = PIXEL_TYPE_16S;
}
#if _MONOCHROME
// Continue with the gray channel only (useful for debugging)
frame->num_channels = 1;
frame->format = FRAME_FORMAT_GRAY;
#endif
}
}
// Faster version of ConvertRGBToFrame8uNoIPP using MMX intrinsics
void ConvertNV12to10bitYUVFrame(uint8_t *nv12, int pitch, FRAME *frame, uint8_t *scratch, int scratchsize,
int color_space, int precision, int progressive)
{
ROI roi;
int display_height,height,width;
//int shift = 6; // using 10-bit math
assert(MIN_DECODED_COLOR_SPACE <= color_space && color_space <= MAX_DECODED_COLOR_SPACE);
{
unsigned short *color_plane[3];
int color_pitch[3];
PIXEL8U *Y_row, *U_row, *V_row;
PIXEL *Y_row16, *U_row16, *V_row16;
int Y_pitch, U_pitch, V_pitch;
int row;
int i;
//int precisionshift = 10 - precision;
unsigned short *scanline, *scanline2;
uint8_t *nv12Yline;
uint8_t *nv12UVline,*nv12UVnext;
// The frame format should be three channels of YUV (4:2:2 format)
assert(frame->num_channels == 3);
assert(frame->format == FRAME_FORMAT_YUV);
display_height = frame->display_height;
height = frame->height;
width = frame->width;
assert(scratch);
assert(scratchsize > width * 12);
scanline = (unsigned short *)scratch;
scanline2 = scanline + width*3;
// Get pointers to the image planes and set the pitch for each plane
for (i = 0; i < 3; i++) {
IMAGE *image = frame->channel[i];
// Set the pointer to the individual planes and pitch for each channel
color_plane[i] = (PIXEL16U *)image->band[0];
color_pitch[i] = image->pitch;
// The first channel establishes the processing dimensions
if (i == 0) {
roi.width = image->width;
roi.height = image->height;
}
}
Y_row = (PIXEL8U *)color_plane[0]; Y_pitch = color_pitch[0];
U_row = (PIXEL8U *)color_plane[1]; U_pitch = color_pitch[1];
V_row = (PIXEL8U *)color_plane[2]; V_pitch = color_pitch[2];
if(progressive)
{
nv12Yline = nv12;
nv12UVline = nv12Yline + width*display_height;
nv12UVnext = nv12UVline + width;
for (row = 0; row < display_height; row++)
{
int column = 0;
Y_row16 = (PIXEL *)Y_row;
U_row16 = (PIXEL *)U_row;
V_row16 = (PIXEL *)V_row;
if(row == 0 || row >= display_height-2)
{
for(column = 0; column < roi.width; column += 2)
{
Y_row16[column] = nv12Yline[column]<<2;
Y_row16[column+1] = nv12Yline[column+1]<<2;
V_row16[column/2] = nv12UVline[column]<<2;
U_row16[column/2] = nv12UVline[column+1]<<2;
}
nv12Yline += width;
}
else if(row & 1)
{
for(column = 0; column < roi.width; column += 2)
{
Y_row16[column] = nv12Yline[column]<<2;
Y_row16[column+1] = nv12Yline[column+1]<<2;
V_row16[column/2] = (nv12UVline[column]*3 + nv12UVnext[column]);
U_row16[column/2] = (nv12UVline[column+1]*3 + nv12UVnext[column+1]);
}
nv12Yline += width;
}
else
{
for(column = 0; column < roi.width; column += 2)
{
Y_row16[column] = nv12Yline[column]<<2;
Y_row16[column+1] = nv12Yline[column+1]<<2;
V_row16[column/2] = (nv12UVline[column] + nv12UVnext[column]*3);
U_row16[column/2] = (nv12UVline[column+1] + nv12UVnext[column+1]*3);
}
nv12Yline += width;
nv12UVline = nv12UVnext;
nv12UVnext = nv12UVline + width;
}
// Advance the YUV pointers
Y_row += Y_pitch;
U_row += U_pitch;
V_row += V_pitch;
}
}
else
{
uint8_t *nv12UVline2, *nv12UVnext2;
nv12Yline = nv12;
nv12UVline = nv12Yline + width*display_height;
nv12UVnext = nv12UVline + width*2;
nv12UVline2 = nv12UVline + width;
nv12UVnext2 = nv12UVline2 + width*2;
//Top field
for (row = 0; row < display_height; row+=2)
{
int column = 0;
Y_row16 = (PIXEL *)Y_row;
U_row16 = (PIXEL *)U_row;
V_row16 = (PIXEL *)V_row;
//Top field
if(row == 0 || row >= display_height-2)
{
for(column = 0; column < roi.width; column += 2)
{
Y_row16[column] = nv12Yline[column]<<2;
Y_row16[column+1] = nv12Yline[column+1]<<2;
V_row16[column/2] = nv12UVline[column]<<2;
U_row16[column/2] = nv12UVline[column+1]<<2;
}
nv12Yline += width;
}
else if(row & 2)
{
for(column = 0; column < roi.width; column += 2)
{
Y_row16[column] = nv12Yline[column]<<2;
Y_row16[column+1] = nv12Yline[column+1]<<2;
V_row16[column/2] = (nv12UVline[column]*5 + nv12UVnext[column]*3)>>1;
U_row16[column/2] = (nv12UVline[column+1]*5 + nv12UVnext[column+1]*3)>>1;
}
nv12Yline += width;
}
else
{
for(column = 0; column < roi.width; column += 2)
{
Y_row16[column] = nv12Yline[column]<<2;
Y_row16[column+1] = nv12Yline[column+1]<<2;
V_row16[column/2] = (nv12UVline[column] + nv12UVnext[column]*7)>>1;
U_row16[column/2] = (nv12UVline[column+1] + nv12UVnext[column+1]*7)>>1;
}
nv12Yline += width;
nv12UVline = nv12UVnext;
nv12UVnext = nv12UVline + width*2;
}
// Advance the YUV pointers
Y_row += Y_pitch;
U_row += U_pitch;
V_row += V_pitch;
Y_row16 = (PIXEL *)Y_row;
U_row16 = (PIXEL *)U_row;
V_row16 = (PIXEL *)V_row;
//Bottom field
if(row <= 2 || row >= display_height-2)
{
for(column = 0; column < roi.width; column += 2)
{
Y_row16[column] = nv12Yline[column]<<2;
Y_row16[column+1] = nv12Yline[column+1]<<2;
V_row16[column/2] = nv12UVline2[column]<<2;
U_row16[column/2] = nv12UVline2[column+1]<<2;
}
nv12Yline += width;
}
else if(row & 2)
{
for(column = 0; column < roi.width; column += 2)
{
Y_row16[column] = nv12Yline[column]<<2;
Y_row16[column+1] = nv12Yline[column+1]<<2;
V_row16[column/2] = (nv12UVline2[column] + nv12UVnext2[column]*7)>>1;
U_row16[column/2] = (nv12UVline2[column+1] + nv12UVnext2[column+1]*7)>>1;
}
nv12Yline += width;
nv12UVline2 = nv12UVnext2;
nv12UVnext2 = nv12UVline2 + width*2;
}
else
{
for(column = 0; column < roi.width; column += 2)
{
Y_row16[column] = nv12Yline[column]<<2;
Y_row16[column+1] = nv12Yline[column+1]<<2;
V_row16[column/2] = (nv12UVline2[column]*3 + nv12UVnext2[column]*5)>>1;
U_row16[column/2] = (nv12UVline2[column+1]*3 + nv12UVnext2[column+1]*5)>>1;
}
nv12Yline += width;
}
// Advance the YUV pointers
Y_row += Y_pitch;
U_row += U_pitch;
V_row += V_pitch;
}
}
for (; row < height; row++)
{
int column = 0;
Y_row16 = (PIXEL *)Y_row;
U_row16 = (PIXEL *)U_row;
V_row16 = (PIXEL *)V_row;
for(; column < roi.width; column += 2)
{
int Y = 64, UV = 512;
Y_row16[column] = Y;
U_row16[column/2] = UV;
V_row16[column/2] = UV;
Y_row16[column+1] = Y;
}
// Advance the YUV pointers
Y_row += Y_pitch;
U_row += U_pitch;
V_row += V_pitch;
}
// Set the image parameters for each channel
for (i = 0; i < 3; i++)
{
IMAGE *image = frame->channel[i];
int band;
// Set the image scale
for (band = 0; band < IMAGE_NUM_BANDS; band++)
image->scale[band] = 1;
// Set the pixel type
image->pixel_type[0] = PIXEL_TYPE_16S;
}
#if _MONOCHROME
// Continue with the gray channel only (useful for debugging)
frame->num_channels = 1;
frame->format = FRAME_FORMAT_GRAY;
#endif
}
}
void ConvertYV12to10bitYUVFrame(uint8_t *nv12, int pitch, FRAME *frame, uint8_t *scratch, int scratchsize,
int color_space, int precision, int progressive)
{
ROI roi;
int display_height,height,width;
//int shift = 6; // using 10-bit math
assert(MIN_DECODED_COLOR_SPACE <= color_space && color_space <= MAX_DECODED_COLOR_SPACE);
{
unsigned short *color_plane[3];
int color_pitch[3];
PIXEL8U *Y_row, *U_row, *V_row;
PIXEL *Y_row16, *U_row16, *V_row16;
int Y_pitch, U_pitch, V_pitch;
int row;
int i;
//int precisionshift = 10 - precision;
unsigned short *scanline, *scanline2;
uint8_t *nv12Yline;
uint8_t *nv12Uline,*nv12Unext;
uint8_t *nv12Vline,*nv12Vnext;
// The frame format should be three channels of YUV (4:2:2 format)
assert(frame->num_channels == 3);
assert(frame->format == FRAME_FORMAT_YUV);
display_height = frame->display_height;
height = frame->height;
width = frame->width;
assert(scratch);
assert(scratchsize > width * 12);
scanline = (unsigned short *)scratch;
scanline2 = scanline + width*3;
// Get pointers to the image planes and set the pitch for each plane
for (i = 0; i < 3; i++) {
IMAGE *image = frame->channel[i];
// Set the pointer to the individual planes and pitch for each channel
color_plane[i] = (PIXEL16U *)image->band[0];
color_pitch[i] = image->pitch;
// The first channel establishes the processing dimensions
if (i == 0) {
roi.width = image->width;
roi.height = image->height;
}
}
Y_row = (PIXEL8U *)color_plane[0]; Y_pitch = color_pitch[0];
U_row = (PIXEL8U *)color_plane[1]; U_pitch = color_pitch[1];
V_row = (PIXEL8U *)color_plane[2]; V_pitch = color_pitch[2];
if(progressive)
{
nv12Yline = nv12;
nv12Uline = nv12Yline + width*display_height;
nv12Vline = nv12Uline + (width/2)*(display_height/2);
nv12Unext = nv12Uline + width/2;
nv12Vnext = nv12Vline + width/2;
for (row = 0; row < display_height; row++)
{
int column = 0;
Y_row16 = (PIXEL *)Y_row;
U_row16 = (PIXEL *)U_row;
V_row16 = (PIXEL *)V_row;
if(row == 0 || row == display_height-1)
{
for(column = 0; column < roi.width; column += 2)
{
Y_row16[column] = nv12Yline[column]<<2;
Y_row16[column+1] = nv12Yline[column+1]<<2;
U_row16[column/2] = nv12Uline[column/2]<<2;
V_row16[column/2] = nv12Vline[column/2]<<2;
}
nv12Yline += width;
}
else if(row & 1)
{
for(column = 0; column < roi.width; column += 2)
{
Y_row16[column] = nv12Yline[column]<<2;
Y_row16[column+1] = nv12Yline[column+1]<<2;
U_row16[column/2] = (nv12Uline[column/2]*3 + nv12Unext[column/2]);
V_row16[column/2] = (nv12Vline[column/2]*3 + nv12Vnext[column/2]);
}
nv12Yline += width;
}
else
{
for(column = 0; column < roi.width; column += 2)
{
Y_row16[column] = nv12Yline[column]<<2;
Y_row16[column+1] = nv12Yline[column+1]<<2;
U_row16[column/2] = (nv12Uline[column/2] + nv12Unext[column/2]*3);
V_row16[column/2] = (nv12Vline[column/2] + nv12Vnext[column/2]*3);
}
nv12Yline += width;
nv12Uline = nv12Unext;
nv12Vline = nv12Vnext;
nv12Unext = nv12Uline + width/2;
nv12Vnext = nv12Vline + width/2;
}
// Advance the YUV pointers
Y_row += Y_pitch;
U_row += U_pitch;
V_row += V_pitch;
}
}
else
{
uint8_t *nv12Uline2, *nv12Unext2;
uint8_t *nv12Vline2, *nv12Vnext2;
nv12Yline = nv12;
nv12Uline = nv12Yline + width*display_height;
nv12Vline = nv12Uline + (width/2)*(display_height/2);
nv12Unext = nv12Uline + width;
nv12Vnext = nv12Vline + width;
nv12Uline2 = nv12Uline + width/2;
nv12Unext2 = nv12Uline2 + width;
nv12Vline2 = nv12Vline + width/2;
nv12Vnext2 = nv12Vline2 + width;
//Top field
for (row = 0; row < display_height; row+=2)
{
int column = 0;
Y_row16 = (PIXEL *)Y_row;
U_row16 = (PIXEL *)U_row;
V_row16 = (PIXEL *)V_row;
//Top field
if(row == 0)
{
for(column = 0; column < roi.width; column += 2)
{
Y_row16[column] = nv12Yline[column]<<2;
Y_row16[column+1] = nv12Yline[column+1]<<2;
U_row16[column/2] = nv12Uline[column/2]<<2;
V_row16[column/2] = nv12Vline[column/2]<<2;
}
nv12Yline += width;
}
else if(row & 2)
{
for(column = 0; column < roi.width; column += 2)
{
Y_row16[column] = nv12Yline[column]<<2;
Y_row16[column+1] = nv12Yline[column+1]<<2;
U_row16[column/2] = (nv12Uline[column/2]*5 + nv12Unext[column/2]*3)>>1;
V_row16[column/2] = (nv12Vline[column/2]*5 + nv12Vnext[column/2]*3)>>1;
}
nv12Yline += width;
}
else
{
for(column = 0; column < roi.width; column += 2)
{
Y_row16[column] = nv12Yline[column]<<2;
Y_row16[column+1] = nv12Yline[column+1]<<2;
U_row16[column/2] = (nv12Uline[column/2] + nv12Unext[column/2]*7)>>1;
V_row16[column/2] = (nv12Vline[column/2] + nv12Vnext[column/2]*7)>>1;
}
nv12Yline += width;
nv12Uline = nv12Unext;
nv12Vline = nv12Vnext;
nv12Unext = nv12Uline + width;
nv12Vnext = nv12Vline + width;
}