SDL  2.0
Data Structures | Functions
SDL_yuv_sw_c.h File Reference
#include "../SDL_internal.h"
#include "SDL_video.h"
+ Include dependency graph for SDL_yuv_sw_c.h:
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Go to the source code of this file.

Data Structures

struct  SDL_SW_YUVTexture

Functions

SDL_SW_YUVTexture * SDL_SW_CreateYUVTexture (Uint32 format, int w, int h)
int SDL_SW_QueryYUVTexturePixels (SDL_SW_YUVTexture *swdata, void **pixels, int *pitch)
int SDL_SW_UpdateYUVTexture (SDL_SW_YUVTexture *swdata, const SDL_Rect *rect, const void *pixels, int pitch)
int SDL_SW_UpdateYUVTexturePlanar (SDL_SW_YUVTexture *swdata, const SDL_Rect *rect, const Uint8 *Yplane, int Ypitch, const Uint8 *Uplane, int Upitch, const Uint8 *Vplane, int Vpitch)
int SDL_SW_LockYUVTexture (SDL_SW_YUVTexture *swdata, const SDL_Rect *rect, void **pixels, int *pitch)
void SDL_SW_UnlockYUVTexture (SDL_SW_YUVTexture *swdata)
int SDL_SW_CopyYUVToRGB (SDL_SW_YUVTexture *swdata, const SDL_Rect *srcrect, Uint32 target_format, int w, int h, void *pixels, int pitch)
void SDL_SW_DestroyYUVTexture (SDL_SW_YUVTexture *swdata)

Function Documentation

int SDL_SW_CopyYUVToRGB ( SDL_SW_YUVTexture *  swdata,
const SDL_Rect *  srcrect,
Uint32  target_format,
int  w,
int  h,
void *  pixels,
int  pitch 
)

Definition at line 334 of file SDL_yuv_sw.c.

References SDL_SW_YUVTexture::display, SDL_SW_YUVTexture::format, SDL_SW_YUVTexture::h, SDL_Rect::h, SDL_Surface::h, NULL, SDL_Surface::pitch, SDL_SW_YUVTexture::pitches, SDL_Surface::pixels, SDL_SW_YUVTexture::planes, rect, SDL_ConvertPixels, SDL_CreateRGBSurface, SDL_CreateRGBSurfaceFrom, SDL_FreeSurface, SDL_PixelFormatEnumToMasks, SDL_SoftStretch, SDL_SW_YUVTexture::stretch, SDL_SW_YUVTexture::target_format, SDL_SW_YUVTexture::w, SDL_Rect::w, SDL_Surface::w, SDL_Rect::x, and SDL_Rect::y.

Referenced by SDL_UnlockTextureYUV(), SDL_UpdateTextureYUV(), and SDL_UpdateTextureYUVPlanar().

{
int stretch;
/* Make sure we're set up to display in the desired format */
if (target_format != swdata->target_format && swdata->display) {
SDL_FreeSurface(swdata->display);
swdata->display = NULL;
}
stretch = 0;
if (srcrect->x || srcrect->y || srcrect->w < swdata->w || srcrect->h < swdata->h) {
/* The source rectangle has been clipped.
Using a scratch surface is easier than adding clipped
source support to all the blitters, plus that would
slow them down in the general unclipped case.
*/
stretch = 1;
} else if ((srcrect->w != w) || (srcrect->h != h)) {
stretch = 1;
}
if (stretch) {
int bpp;
Uint32 Rmask, Gmask, Bmask, Amask;
if (swdata->display) {
swdata->display->w = w;
swdata->display->h = h;
swdata->display->pixels = pixels;
swdata->display->pitch = pitch;
} else {
/* This must have succeeded in SDL_SW_SetupYUVDisplay() earlier */
SDL_PixelFormatEnumToMasks(target_format, &bpp, &Rmask, &Gmask,
&Bmask, &Amask);
swdata->display =
SDL_CreateRGBSurfaceFrom(pixels, w, h, bpp, pitch, Rmask,
Gmask, Bmask, Amask);
if (!swdata->display) {
return (-1);
}
}
if (!swdata->stretch) {
/* This must have succeeded in SDL_SW_SetupYUVDisplay() earlier */
SDL_PixelFormatEnumToMasks(target_format, &bpp, &Rmask, &Gmask,
&Bmask, &Amask);
swdata->stretch =
SDL_CreateRGBSurface(0, swdata->w, swdata->h, bpp, Rmask,
Gmask, Bmask, Amask);
if (!swdata->stretch) {
return (-1);
}
}
pixels = swdata->stretch->pixels;
pitch = swdata->stretch->pitch;
}
if (SDL_ConvertPixels(swdata->w, swdata->h, swdata->format,
swdata->planes[0], swdata->pitches[0],
target_format, pixels, pitch) < 0) {
return -1;
}
if (stretch) {
SDL_Rect rect = *srcrect;
SDL_SoftStretch(swdata->stretch, &rect, swdata->display, NULL);
}
return 0;
}
SDL_SW_YUVTexture* SDL_SW_CreateYUVTexture ( Uint32  format,
int  w,
int  h 
)

< Planar mode: Y + V + U (3 planes)

< Planar mode: Y + U + V (3 planes)

< Packed mode: Y0+U0+Y1+V0 (1 plane)

< Packed mode: U0+Y0+V0+Y1 (1 plane)

< Packed mode: Y0+V0+Y1+U0 (1 plane)

< Planar mode: Y + U/V interleaved (2 planes)

< Planar mode: Y + V/U interleaved (2 planes)

Definition at line 31 of file SDL_yuv_sw.c.

References SDL_SW_YUVTexture::format, SDL_SW_YUVTexture::h, NULL, SDL_SW_YUVTexture::pitches, SDL_SW_YUVTexture::pixels, SDL_SW_YUVTexture::planes, SDL_assert, SDL_calloc, SDL_malloc, SDL_OutOfMemory, SDL_PIXELFORMAT_IYUV, SDL_PIXELFORMAT_NV12, SDL_PIXELFORMAT_NV21, SDL_PIXELFORMAT_UNKNOWN, SDL_PIXELFORMAT_UYVY, SDL_PIXELFORMAT_YUY2, SDL_PIXELFORMAT_YV12, SDL_PIXELFORMAT_YVYU, SDL_SetError, SDL_SW_DestroyYUVTexture(), SDL_SW_YUVTexture::target_format, and SDL_SW_YUVTexture::w.

Referenced by SDL_CreateTexture().

{
SDL_SW_YUVTexture *swdata;
switch (format) {
case SDL_PIXELFORMAT_YV12:
case SDL_PIXELFORMAT_IYUV:
case SDL_PIXELFORMAT_YUY2:
case SDL_PIXELFORMAT_UYVY:
case SDL_PIXELFORMAT_YVYU:
case SDL_PIXELFORMAT_NV12:
case SDL_PIXELFORMAT_NV21:
break;
default:
SDL_SetError("Unsupported YUV format");
return NULL;
}
swdata = (SDL_SW_YUVTexture *) SDL_calloc(1, sizeof(*swdata));
if (!swdata) {
SDL_OutOfMemory();
return NULL;
}
swdata->format = format;
swdata->target_format = SDL_PIXELFORMAT_UNKNOWN;
swdata->w = w;
swdata->h = h;
{
const int sz_plane = w * h;
const int sz_plane_chroma = ((w + 1) / 2) * ((h + 1) / 2);
const int sz_plane_packed = ((w + 1) / 2) * h;
int dst_size = 0;
switch(format)
{
case SDL_PIXELFORMAT_YV12: /**< Planar mode: Y + V + U (3 planes) */
case SDL_PIXELFORMAT_IYUV: /**< Planar mode: Y + U + V (3 planes) */
dst_size = sz_plane + sz_plane_chroma + sz_plane_chroma;
break;
case SDL_PIXELFORMAT_YUY2: /**< Packed mode: Y0+U0+Y1+V0 (1 plane) */
case SDL_PIXELFORMAT_UYVY: /**< Packed mode: U0+Y0+V0+Y1 (1 plane) */
case SDL_PIXELFORMAT_YVYU: /**< Packed mode: Y0+V0+Y1+U0 (1 plane) */
dst_size = 4 * sz_plane_packed;
break;
case SDL_PIXELFORMAT_NV12: /**< Planar mode: Y + U/V interleaved (2 planes) */
case SDL_PIXELFORMAT_NV21: /**< Planar mode: Y + V/U interleaved (2 planes) */
dst_size = sz_plane + sz_plane_chroma + sz_plane_chroma;
break;
default:
SDL_assert(0 && "We should never get here (caught above)");
break;
}
swdata->pixels = (Uint8 *) SDL_malloc(dst_size);
if (!swdata->pixels) {
SDL_SW_DestroyYUVTexture(swdata);
SDL_OutOfMemory();
return NULL;
}
}
/* Find the pitch and offset values for the texture */
switch (format) {
case SDL_PIXELFORMAT_YV12:
case SDL_PIXELFORMAT_IYUV:
swdata->pitches[0] = w;
swdata->pitches[1] = (swdata->pitches[0] + 1) / 2;
swdata->pitches[2] = (swdata->pitches[0] + 1) / 2;
swdata->planes[0] = swdata->pixels;
swdata->planes[1] = swdata->planes[0] + swdata->pitches[0] * h;
swdata->planes[2] = swdata->planes[1] + swdata->pitches[1] * ((h + 1) / 2);
break;
case SDL_PIXELFORMAT_YUY2:
case SDL_PIXELFORMAT_UYVY:
case SDL_PIXELFORMAT_YVYU:
swdata->pitches[0] = ((w + 1) / 2) * 4;
swdata->planes[0] = swdata->pixels;
break;
case SDL_PIXELFORMAT_NV12:
case SDL_PIXELFORMAT_NV21:
swdata->pitches[0] = w;
swdata->pitches[1] = 2 * ((swdata->pitches[0] + 1) / 2);
swdata->planes[0] = swdata->pixels;
swdata->planes[1] = swdata->planes[0] + swdata->pitches[0] * h;
break;
default:
SDL_assert(0 && "We should never get here (caught above)");
break;
}
/* We're all done.. */
return (swdata);
}
void SDL_SW_DestroyYUVTexture ( SDL_SW_YUVTexture *  swdata)

Definition at line 404 of file SDL_yuv_sw.c.

References SDL_SW_YUVTexture::display, SDL_SW_YUVTexture::pixels, SDL_free, SDL_FreeSurface, and SDL_SW_YUVTexture::stretch.

Referenced by SDL_DestroyTexture(), and SDL_SW_CreateYUVTexture().

{
if (swdata) {
SDL_free(swdata->pixels);
SDL_FreeSurface(swdata->stretch);
SDL_FreeSurface(swdata->display);
SDL_free(swdata);
}
}
int SDL_SW_LockYUVTexture ( SDL_SW_YUVTexture *  swdata,
const SDL_Rect *  rect,
void **  pixels,
int *  pitch 
)

Definition at line 302 of file SDL_yuv_sw.c.

References SDL_SW_YUVTexture::format, SDL_SW_YUVTexture::h, SDL_Rect::h, SDL_SW_YUVTexture::pitches, SDL_SW_YUVTexture::planes, SDL_PIXELFORMAT_IYUV, SDL_PIXELFORMAT_NV12, SDL_PIXELFORMAT_NV21, SDL_PIXELFORMAT_YV12, SDL_SetError, SDL_SW_YUVTexture::w, SDL_Rect::w, SDL_Rect::x, and SDL_Rect::y.

Referenced by SDL_LockTextureYUV().

{
switch (swdata->format) {
case SDL_PIXELFORMAT_YV12:
case SDL_PIXELFORMAT_IYUV:
case SDL_PIXELFORMAT_NV12:
case SDL_PIXELFORMAT_NV21:
if (rect
&& (rect->x != 0 || rect->y != 0 || rect->w != swdata->w
|| rect->h != swdata->h)) {
return SDL_SetError
("YV12, IYUV, NV12, NV21 textures only support full surface locks");
}
break;
}
if (rect) {
*pixels = swdata->planes[0] + rect->y * swdata->pitches[0] + rect->x * 2;
} else {
*pixels = swdata->planes[0];
}
*pitch = swdata->pitches[0];
return 0;
}
int SDL_SW_QueryYUVTexturePixels ( SDL_SW_YUVTexture *  swdata,
void **  pixels,
int *  pitch 
)

Definition at line 130 of file SDL_yuv_sw.c.

References SDL_SW_YUVTexture::pitches, and SDL_SW_YUVTexture::planes.

{
*pixels = swdata->planes[0];
*pitch = swdata->pitches[0];
return 0;
}
void SDL_SW_UnlockYUVTexture ( SDL_SW_YUVTexture *  swdata)

Definition at line 329 of file SDL_yuv_sw.c.

{
}
int SDL_SW_UpdateYUVTexture ( SDL_SW_YUVTexture *  swdata,
const SDL_Rect *  rect,
const void *  pixels,
int  pitch 
)

Definition at line 139 of file SDL_yuv_sw.c.

References SDL_SW_YUVTexture::format, SDL_SW_YUVTexture::h, SDL_Rect::h, SDL_SW_YUVTexture::pitches, SDL_SW_YUVTexture::pixels, SDL_SW_YUVTexture::planes, SDL_memcpy, SDL_PIXELFORMAT_IYUV, SDL_PIXELFORMAT_NV12, SDL_PIXELFORMAT_NV21, SDL_PIXELFORMAT_UYVY, SDL_PIXELFORMAT_YUY2, SDL_PIXELFORMAT_YV12, SDL_PIXELFORMAT_YVYU, SDL_SW_YUVTexture::w, SDL_Rect::w, SDL_Rect::x, and SDL_Rect::y.

Referenced by SDL_UpdateTextureYUV().

{
switch (swdata->format) {
case SDL_PIXELFORMAT_YV12:
case SDL_PIXELFORMAT_IYUV:
if (rect->x == 0 && rect->y == 0 &&
rect->w == swdata->w && rect->h == swdata->h) {
SDL_memcpy(swdata->pixels, pixels,
(swdata->h * swdata->w) + 2* ((swdata->h + 1) /2) * ((swdata->w + 1) / 2));
} else {
Uint8 *src, *dst;
int row;
size_t length;
/* Copy the Y plane */
src = (Uint8 *) pixels;
dst = swdata->pixels + rect->y * swdata->w + rect->x;
length = rect->w;
for (row = 0; row < rect->h; ++row) {
SDL_memcpy(dst, src, length);
src += pitch;
dst += swdata->w;
}
/* Copy the next plane */
src = (Uint8 *) pixels + rect->h * pitch;
dst = swdata->pixels + swdata->h * swdata->w;
dst += rect->y/2 * ((swdata->w + 1) / 2) + rect->x/2;
length = (rect->w + 1) / 2;
for (row = 0; row < (rect->h + 1)/2; ++row) {
SDL_memcpy(dst, src, length);
src += (pitch + 1)/2;
dst += (swdata->w + 1)/2;
}
/* Copy the next plane */
src = (Uint8 *) pixels + rect->h * pitch + ((rect->h + 1) / 2) * ((pitch + 1) / 2);
dst = swdata->pixels + swdata->h * swdata->w +
((swdata->h + 1)/2) * ((swdata->w+1) / 2);
dst += rect->y/2 * ((swdata->w + 1)/2) + rect->x/2;
length = (rect->w + 1) / 2;
for (row = 0; row < (rect->h + 1)/2; ++row) {
SDL_memcpy(dst, src, length);
src += (pitch + 1)/2;
dst += (swdata->w + 1)/2;
}
}
break;
case SDL_PIXELFORMAT_YUY2:
case SDL_PIXELFORMAT_UYVY:
case SDL_PIXELFORMAT_YVYU:
{
Uint8 *src, *dst;
int row;
size_t length;
src = (Uint8 *) pixels;
dst =
swdata->planes[0] + rect->y * swdata->pitches[0] +
rect->x * 2;
length = 4 * ((rect->w + 1) / 2);
for (row = 0; row < rect->h; ++row) {
SDL_memcpy(dst, src, length);
src += pitch;
dst += swdata->pitches[0];
}
}
break;
case SDL_PIXELFORMAT_NV12:
case SDL_PIXELFORMAT_NV21:
{
if (rect->x == 0 && rect->y == 0 && rect->w == swdata->w && rect->h == swdata->h) {
SDL_memcpy(swdata->pixels, pixels,
(swdata->h * swdata->w) + 2* ((swdata->h + 1) /2) * ((swdata->w + 1) / 2));
} else {
Uint8 *src, *dst;
int row;
size_t length;
/* Copy the Y plane */
src = (Uint8 *) pixels;
dst = swdata->pixels + rect->y * swdata->w + rect->x;
length = rect->w;
for (row = 0; row < rect->h; ++row) {
SDL_memcpy(dst, src, length);
src += pitch;
dst += swdata->w;
}
/* Copy the next plane */
src = (Uint8 *) pixels + rect->h * pitch;
dst = swdata->pixels + swdata->h * swdata->w;
dst += 2 * ((rect->y + 1)/2) * ((swdata->w + 1) / 2) + 2 * (rect->x/2);
length = 2 * ((rect->w + 1) / 2);
for (row = 0; row < (rect->h + 1)/2; ++row) {
SDL_memcpy(dst, src, length);
src += 2 * ((pitch + 1)/2);
dst += 2 * ((swdata->w + 1)/2);
}
}
}
}
return 0;
}
int SDL_SW_UpdateYUVTexturePlanar ( SDL_SW_YUVTexture *  swdata,
const SDL_Rect *  rect,
const Uint8 *  Yplane,
int  Ypitch,
const Uint8 *  Uplane,
int  Upitch,
const Uint8 *  Vplane,
int  Vpitch 
)

Definition at line 247 of file SDL_yuv_sw.c.

References SDL_SW_YUVTexture::format, SDL_SW_YUVTexture::h, SDL_Rect::h, SDL_SW_YUVTexture::pixels, SDL_memcpy, SDL_PIXELFORMAT_IYUV, SDL_PIXELFORMAT_YV12, SDL_SW_YUVTexture::w, SDL_Rect::w, SDL_Rect::x, and SDL_Rect::y.

Referenced by SDL_UpdateTextureYUVPlanar().

{
const Uint8 *src;
Uint8 *dst;
int row;
size_t length;
/* Copy the Y plane */
src = Yplane;
dst = swdata->pixels + rect->y * swdata->w + rect->x;
length = rect->w;
for (row = 0; row < rect->h; ++row) {
SDL_memcpy(dst, src, length);
src += Ypitch;
dst += swdata->w;
}
/* Copy the U plane */
src = Uplane;
if (swdata->format == SDL_PIXELFORMAT_IYUV) {
dst = swdata->pixels + swdata->h * swdata->w;
} else {
dst = swdata->pixels + swdata->h * swdata->w +
((swdata->h + 1) / 2) * ((swdata->w + 1) / 2);
}
dst += rect->y/2 * ((swdata->w + 1)/2) + rect->x/2;
length = (rect->w + 1) / 2;
for (row = 0; row < (rect->h + 1)/2; ++row) {
SDL_memcpy(dst, src, length);
src += Upitch;
dst += (swdata->w + 1)/2;
}
/* Copy the V plane */
src = Vplane;
if (swdata->format == SDL_PIXELFORMAT_YV12) {
dst = swdata->pixels + swdata->h * swdata->w;
} else {
dst = swdata->pixels + swdata->h * swdata->w +
((swdata->h + 1) / 2) * ((swdata->w + 1) / 2);
}
dst += rect->y/2 * ((swdata->w + 1)/2) + rect->x/2;
length = (rect->w + 1) / 2;
for (row = 0; row < (rect->h + 1)/2; ++row) {
SDL_memcpy(dst, src, length);
src += Vpitch;
dst += (swdata->w + 1)/2;
}
return 0;
}