videorendererrgb.cpp

<VC++视频音频开发>一书的光盘资料。

	}
    
	return MP_RESULT_ERROR;
}

media_video_mode_t MediaVideoRendererRGB::GetVideoMode()
{
	return this->videoMode;
}

MP_RESULT MediaVideoRendererRGB::Stop()
{
	return MP_RESULT_OK;
}

RECT *MediaVideoRendererRGB::GetFullscreenRects()
{
	return NULL;
}

MP_RESULT MediaVideoRendererRGB::Draw(MediaBuffer *buffer, RECT *rect, int frameNumber, int invertFlag)
{
	HRESULT        ddrval;
	DDSURFACEDESC2 desc;
	DWORD          i;
	subtitles_t   *sub;

	if(this->lpdd && this->lpddsBack && this->lpddsPrimary && buffer) {


		ZeroMemory(&desc, sizeof(DDSURFACEDESC2));
		desc.dwSize     = sizeof(DDSURFACEDESC2);

		ddrval = this->lpddsBack->Lock(NULL, &desc, DDLOCK_SURFACEMEMORYPTR | DDLOCK_WRITEONLY | DDLOCK_WAIT, NULL);

		if(FAILED(ddrval)) {

			return MP_RESULT_ERROR;
		}

		/*
		 * 复制象素
		 */
	
		for(i=0; i < desc.dwHeight; i++) {

			memcpy((char *) desc.lpSurface + i*desc.lPitch, (char *) buffer->GetData() + (desc.dwHeight - i - 1)*this->bpp*this->width, this->width*this->bpp);
		}

		this->lpddsBack->Unlock(NULL);

		/*
		 * 如果有字幕则应用
		 */

		if(this->subtitler) {

			sub = this->subtitler->GetSubtitles(frameNumber);

			if(sub != NULL) {

				/*
				 * 显示它们
				 */

				HDC dc;

				ddrval = this->lpddsBack->GetDC(&dc);

				if(!FAILED(ddrval)) {

					DWORD length, length2, length3;
					SetBkMode(dc, TRANSPARENT);

					switch(sub->nbSubtitles) {

					case 1:
						
						length = GetTabbedTextExtent(dc, sub->subtitlesText[0], 
													 strlen(sub->subtitlesText[0]),
													 0, NULL);
						SetTextColor(dc, 0);
						TextOut(dc, (this->width - length)/2 + 1, this->height - 40 + 1, sub->subtitlesText[0], strlen(sub->subtitlesText[0]));
						SetTextColor(dc, 0xFFFFFF);
						TextOut(dc, (this->width - length)/2, this->height - 40, sub->subtitlesText[0], strlen(sub->subtitlesText[0]));
						break;

					case 2:
						length = GetTabbedTextExtent(dc, sub->subtitlesText[0], 
													 strlen(sub->subtitlesText[0]),
													 0, NULL);
						length2 = GetTabbedTextExtent(dc, sub->subtitlesText[1], 
													 strlen(sub->subtitlesText[1]),
													 0, NULL);

						SetTextColor(dc, 0);
						TextOut(dc, (this->width - length)/2 + 1, this->height - 60 + 1, sub->subtitlesText[0], strlen(sub->subtitlesText[0]));
						TextOut(dc, (this->width - length2)/2 + 1, this->height - 40 + 1, sub->subtitlesText[1], strlen(sub->subtitlesText[1]));
						SetTextColor(dc, 0xFFFFFF);
						TextOut(dc, (this->width - length)/2, this->height - 60, sub->subtitlesText[0], strlen(sub->subtitlesText[0]));
						TextOut(dc, (this->width - length2)/2, this->height - 40, sub->subtitlesText[1], strlen(sub->subtitlesText[1]));
						break;

					case 3:
						length = GetTabbedTextExtent(dc, sub->subtitlesText[0], 
													 strlen(sub->subtitlesText[0]),
													 0, NULL);
						length2 = GetTabbedTextExtent(dc, sub->subtitlesText[1], 
													 strlen(sub->subtitlesText[1]),
													 0, NULL);
						length3 = GetTabbedTextExtent(dc, sub->subtitlesText[2], 
													 strlen(sub->subtitlesText[2]),
													 0, NULL);

						SetTextColor(dc, 0);
						TextOut(dc, (this->width - length)/2 + 1, this->height - 80 + 1, sub->subtitlesText[0], strlen(sub->subtitlesText[0]));
						TextOut(dc, (this->width - length2)/2 + 1, this->height - 60 + 1, sub->subtitlesText[1], strlen(sub->subtitlesText[1]));
						TextOut(dc, (this->width - length3)/2 + 1, this->height - 40 + 1, sub->subtitlesText[2], strlen(sub->subtitlesText[2]));
						SetTextColor(dc, 0xFFFFFF);
						TextOut(dc, (this->width - length)/2, this->height - 80, sub->subtitlesText[0], strlen(sub->subtitlesText[0]));
						TextOut(dc, (this->width - length2)/2, this->height - 60, sub->subtitlesText[1], strlen(sub->subtitlesText[1]));
						TextOut(dc, (this->width - length3)/2, this->height - 40, sub->subtitlesText[2], strlen(sub->subtitlesText[2]));
						break;
					}

					this->lpddsBack->ReleaseDC(dc);
				}
			}
		}

		/*
		 * 复制到窗口
		 */

		if(this->hwndPlayback) {

			RECT                rcRect;
			RECT                destRect;
			POINT               pt;

	        rcRect.left   = 0;
		    rcRect.top    = 0;
			rcRect.right  = this->width;
			rcRect.bottom = this->height;

			GetClientRect( this->hwndPlayback, &destRect );

			/*
			 * 压缩rect以便放置控件
			 */


			destRect.left   += rect->left;
			destRect.right  =  rect->left + rect->right;

			destRect.top    += rect->top;
			destRect.bottom  = rect->bottom;

			pt.x = pt.y = 0;
				
			ClientToScreen( this->hwndPlayback, &pt );
			OffsetRect(&destRect, pt.x, pt.y);

			while( 1 )
			{
				ddrval = this->lpddsPrimary->Blt( &destRect, this->lpddsBack, &rcRect, DDBLT_ASYNC | DDBLT_WAIT, NULL);

				if( ddrval == DD_OK )
				{
					break;
				}

				if( ddrval == DDERR_SURFACELOST )
				{
					if(!this->lpdd->RestoreAllSurfaces())
					{
						return MP_RESULT_ERROR;
					}	
				}	

				if( ddrval != DDERR_WASSTILLDRAWING )
				{
					return MP_RESULT_ERROR;
				}
			}

			if(ddrval != DD_OK)
			{
				return MP_RESULT_ERROR;
			}

			return MP_RESULT_OK;
		}
	}

	return MP_RESULT_ERROR;
}

MP_RESULT MediaVideoRendererRGB::DrawFullscreen(MediaBuffer *buffer, int frameNumber, int invertFlag, int desktop)
{
	DDSURFACEDESC2 desc;
	DWORD          i;
	HRESULT        ddrval;
	subtitles_t   *sub;

	if(buffer && this->lpdd && this->lpddsPrimary) {

		ZeroMemory(&desc, sizeof(DDSURFACEDESC2));
		desc.dwSize = sizeof(DDSURFACEDESC2);

		this->lpddsBack->Lock(NULL, &desc, DDLOCK_SURFACEMEMORYPTR | DDLOCK_WRITEONLY | DDLOCK_WAIT, NULL);

		for(i=0; i < desc.dwHeight; i++) {

			memcpy((char *) desc.lpSurface + i*desc.lPitch, (char *) buffer->GetData() + (desc.dwHeight - i - 1)*this->bpp*this->width, this->width*this->bpp);
		}

		this->lpddsBack->Unlock(NULL);

		/*
		 * 字幕
		 */

		if(this->subtitler) {

			sub = this->subtitler->GetSubtitles(frameNumber);

			if(sub != NULL) {

				/*
				 * 显示
				 */

				HDC dc;

				ddrval = this->lpddsBack->GetDC(&dc);

				if(!FAILED(ddrval)) {

					DWORD length, length2, length3;
					SetBkMode(dc, TRANSPARENT);

					switch(sub->nbSubtitles) {

					case 1:
						
						length = GetTabbedTextExtent(dc, sub->subtitlesText[0], 
													 strlen(sub->subtitlesText[0]),
													 0, NULL);
						SetTextColor(dc, 0);
						TextOut(dc, (this->width - length)/2 + 1, this->height - 40 + 1, sub->subtitlesText[0], strlen(sub->subtitlesText[0]));
						SetTextColor(dc, 0xFFFFFF);
						TextOut(dc, (this->width - length)/2, this->height - 40, sub->subtitlesText[0], strlen(sub->subtitlesText[0]));
						break;

					case 2:
						length = GetTabbedTextExtent(dc, sub->subtitlesText[0], 
													 strlen(sub->subtitlesText[0]),
													 0, NULL);
						length2 = GetTabbedTextExtent(dc, sub->subtitlesText[1], 
													 strlen(sub->subtitlesText[1]),
													 0, NULL);

						SetTextColor(dc, 0);
						TextOut(dc, (this->width - length)/2 + 1, this->height - 60 + 1, sub->subtitlesText[0], strlen(sub->subtitlesText[0]));
						TextOut(dc, (this->width - length2)/2 + 1, this->height - 40 + 1, sub->subtitlesText[1], strlen(sub->subtitlesText[1]));
						SetTextColor(dc, 0xFFFFFF);
						TextOut(dc, (this->width - length)/2, this->height - 60, sub->subtitlesText[0], strlen(sub->subtitlesText[0]));
						TextOut(dc, (this->width - length2)/2, this->height - 40, sub->subtitlesText[1], strlen(sub->subtitlesText[1]));
						break;

					case 3:
						length = GetTabbedTextExtent(dc, sub->subtitlesText[0], 
													 strlen(sub->subtitlesText[0]),
													 0, NULL);
						length2 = GetTabbedTextExtent(dc, sub->subtitlesText[1], 
													 strlen(sub->subtitlesText[1]),
													 0, NULL);
						length3 = GetTabbedTextExtent(dc, sub->subtitlesText[2], 
													 strlen(sub->subtitlesText[2]),
													 0, NULL);

						SetTextColor(dc, 0);
						TextOut(dc, (this->width - length)/2 + 1, this->height - 80 + 1, sub->subtitlesText[0], strlen(sub->subtitlesText[0]));
						TextOut(dc, (this->width - length2)/2 + 1, this->height - 60 + 1, sub->subtitlesText[1], strlen(sub->subtitlesText[1]));
						TextOut(dc, (this->width - length3)/2 + 1, this->height - 40 + 1, sub->subtitlesText[2], strlen(sub->subtitlesText[2]));
						SetTextColor(dc, 0xFFFFFF);
						TextOut(dc, (this->width - length)/2, this->height - 80, sub->subtitlesText[0], strlen(sub->subtitlesText[0]));
						TextOut(dc, (this->width - length2)/2, this->height - 60, sub->subtitlesText[1], strlen(sub->subtitlesText[1]));
						TextOut(dc, (this->width - length3)/2, this->height - 40, sub->subtitlesText[2], strlen(sub->subtitlesText[2]));
						break;
					}

					this->lpddsBack->ReleaseDC(dc);
				}
			}
		}

		/*
		 * 清除后缓冲
		 *
		 */
		/*
		 * 复制到后缓冲
		 */

		RECT rcRect, dst;

		rcRect.left   = 0;
		rcRect.top    = 0;
		rcRect.right  = this->width;
		rcRect.bottom = this->height;

		DWORD height;
		DWORD width;

		switch(options.aspect_ratio) {

		case ASPECT_RATIO_FREE:
		case ASPECT_RATIO_ORIGINAL:

			width  = this->width;
			height = this->height;
			break;

		case ASPECT_RATIO_TV:
		case ASPECT_RATIO_WIDE:
		case ASPECT_RATIO_CUSTOM:
			
			if(aspectRatios[options.aspect_ratio].yFactor < aspectRatios[options.aspect_ratio].xFactor) {

				width  = this->width;
				height = this->width*aspectRatios[options.aspect_ratio].yFactor/aspectRatios[options.aspect_ratio].xFactor;
			}
			else {
			
				height = this->height;
				width  = this->height*aspectRatios[options.aspect_ratio].xFactor/aspectRatios[options.aspect_ratio].yFactor;
			}
			break;
		}

		if(this->fullscreenWidth * height / width > this->fullscreenHeight) {

		    dst.left   = (this->fullscreenWidth - (this->fullscreenHeight * width / height)) / 2; 
			dst.top    = 0; 
			dst.right  = dst.left + (this->fullscreenHeight * width / height);
			dst.bottom = this->fullscreenHeight; 
		}
		else {

			dst.left   = 0;
			dst.top    = (this->fullscreenHeight - (this->fullscreenWidth * height / width))/2;
			dst.right  = this->fullscreenWidth;
			dst.bottom = (this->fullscreenHeight - (this->fullscreenWidth * height / width))/2 + (this->fullscreenWidth * height / width);
		}

		ddrval = this->lpddsPrimary->Blt( &dst, this->lpddsBack, &rcRect, DDBLT_ASYNC, NULL);
	
		return MP_RESULT_OK;
	}

	return MP_RESULT_ERROR;
}

MP_RESULT MediaVideoRendererRGB::Close()
{
	if(this->lpdd) {
		
		this->lpdd->RestoreDisplayMode();
		this->lpdd->SetCooperativeLevel(this->hwndPlayback, DDSCL_NORMAL);
	}

	if(this->lpddsBack) {
	
		this->lpddsBack->Release();
		this->lpddsBack = NULL;
	}

	if(this->lpddsPrimary) {
	
		this->lpddsPrimary->Release();
		this->lpddsPrimary = NULL;
	}

	if(this->lpdd) {
	
		this->lpdd->Release();
		this->lpdd = NULL;
	}

	return MP_RESULT_OK;
}