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// **************** décodage *********************** //
// Creation de la structure mpegInInfo
m_pMpegInInfo = mpegInNew(NULL,NULL);
.
m_pMpegInInfo->outputTypes = VIDEO_RGB | AUDIO_PCM;
m_pMpegInInfo->fourCC = FOURCC_YV12;
m_pMpegInInfo->use_external_frame_buffer = 1 ;
.
m_FrameInfo.four_cc = FOURCC_YV12;
m_FrameInfo.stride[0]= largeurFrame;
m_FrameInfo.stride[2]= largeurFrame /4;
m_FrameInfo.stride[1]= largeurFrame /4;
.
// buffer de réception
unsigned char * bufferRx = new unsigned char[largeurFrame*hauteurFrame] * 1.5;
.
m_FrameInfo.plane[0] = bufferRx;
m_FrameInfo.plane[2] = bufferRx + (largeurFrame *hauteurFrame);
m_FrameInfo.plane[1] = bufferRx + (largeurFrame *hauteurFrame) + ( (largeurFrame *hauteurFrame) / 4 );
// réception
mpegInSeekFrame(m_pMpegInInfo,p_iFramePos)
....
// **************** Affichage *********************** //
static SDL_Surface *screen;
static SDL_Overlay *bmp;
.....
// initialisation SDL
SDL_Init(SDL_INIT_VIDEO)..
screen = SDL_SetVideoMode(zoneDest.width(), zoneDest.height(), 12, SDL_HWSURFACE);
bmp = SDL_CreateYUVOverlay(zoneDest.width(), zoneDest.height(), SDL_YV12_OVERLAY, screen);
// Lock
SDL_LockYUVOverlay(bmp);
SDL_Rect blitrect = {zoneDes.x(),zoneDes.y(),zoneDes.width(),zoneDes.height()};
bmp->pitches[0] = largeurFrame;
bmp->pitches[2] = largeurFrame/4;
bmp->pitches[1] = largeurFrame/4;
bmp->pixels[0] = bufferRx ;
bmp->pixels[2] = bufferRx + largeurFrame * hauteurFrame;
bmp->pixels[1] = bufferRx + largeurFrame * hauteurFrame + (largeurFrame * hauteurFrame/4);
// unlock
SDL_UnlockYUVOverlay(bmp);
// afichage
SDL_DisplayYUVOverlay(bmp, &blitrect); |
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