C++ (Cpp) CanCompress Examples

Example #1

File: zmbv_vfw.cpp Project: joncampbell123/dosbox-x

DWORD CodecInst::CompressBegin(LPBITMAPINFOHEADER lpbiIn, LPBITMAPINFOHEADER lpbiOut) {
	CompressEnd();  // free resources if necessary
	if (!CanCompress(lpbiIn, lpbiOut, true))
		return ICERR_BADFORMAT;
	codec = new VideoCodec();
	if (!codec)
		return ICERR_MEMORY;
	if (!codec->SetupCompress( lpbiIn->biWidth, lpbiIn->biHeight))
		return ICERR_MEMORY;
	return ICERR_OK;
}

Example #2

File: zmbv_vfw.cpp Project: raedwulf/dosbox

DWORD CodecInst::Compress(ICCOMPRESS* icinfo, DWORD dwSize) {
	int i, pitch;
	zmbv_format_t format;
	LPBITMAPINFOHEADER lpbiIn=icinfo->lpbiInput;
	LPBITMAPINFOHEADER lpbiOut=icinfo->lpbiOutput;
	if (!CanCompress(lpbiIn, lpbiOut, true))
		return ICERR_BADFORMAT;
	if (!icinfo->lpInput || !icinfo->lpOutput)
		return ICERR_ABORT;
	switch (GetInputBitDepth(lpbiIn)) {
	case 8:
		format = ZMBV_FORMAT_8BPP;
		pitch = lpbiIn->biWidth;
		break;
	case 15:
		format = ZMBV_FORMAT_15BPP;
		pitch = lpbiIn->biWidth * 2;
		break;
	case 16:
		format = ZMBV_FORMAT_16BPP;
		pitch = lpbiIn->biWidth * 2;
		break;
	case 32:
		format = ZMBV_FORMAT_32BPP;
		pitch = lpbiIn->biWidth * 4;
		break;
	}

	// DIB scanlines for RGB formats are always aligned to DWORD.
	pitch = (pitch + 3) & ~3;

	// force a key frame if requested by the client
	int flags = 0;
	if (icinfo->dwFlags & ICCOMPRESS_KEYFRAME)
		flags |= 1;

	codec->PrepareCompressFrame( flags, format, 0, icinfo->lpOutput, 99999999);
	char *readPt = (char *)icinfo->lpInput + pitch*(lpbiIn->biHeight - 1);
	for(i = 0;i<lpbiIn->biHeight;i++) {
		codec->CompressLines(1, (void **)&readPt );
		readPt -= pitch;
	}
	lpbiOut->biSizeImage = codec->FinishCompressFrame();

	if (flags & 1)
		*icinfo->lpdwFlags = AVIIF_KEYFRAME;
	else
		*icinfo->lpdwFlags = 0;

	return ICERR_OK;
}

Example #3

File: zmbv_vfw.cpp Project: joncampbell123/dosbox-x

DWORD CodecInst::Compress(ICCOMPRESS* icinfo, DWORD dwSize) {
	int i, pitch;
	zmbv_format_t format;
	LPBITMAPINFOHEADER lpbiIn=icinfo->lpbiInput;
	LPBITMAPINFOHEADER lpbiOut=icinfo->lpbiOutput;
	if (!CanCompress(lpbiIn, lpbiOut, true))
		return ICERR_BADFORMAT;
	if (!icinfo->lpInput || !icinfo->lpOutput)
		return ICERR_ABORT;
	switch (GetInputBitDepth(lpbiIn)) {
	case 8:
		format = ZMBV_FORMAT_8BPP;
		pitch = lpbiIn->biWidth;
		break;
	case 15:
		format = ZMBV_FORMAT_15BPP;
		pitch = lpbiIn->biWidth * 2;
		break;
	case 16:
		format = ZMBV_FORMAT_16BPP;
		pitch = lpbiIn->biWidth * 2;
		break;
	case 32:
		format = ZMBV_FORMAT_32BPP;
		pitch = lpbiIn->biWidth * 4;
		break;
	}

	// DIB scanlines for RGB formats are always aligned to DWORD.
	pitch = (pitch + 3) & ~3;

	// force a key frame if requested by the client
	int flags = 0;
	if (icinfo->dwFlags & ICCOMPRESS_KEYFRAME)
		flags |= 1;

	char palette[256 * 4];
	char *pal = NULL;

	if (lpbiIn->biBitCount == 8) {
		const int entries = icinfo->lpbiInput->biClrUsed ? icinfo->lpbiInput->biClrUsed : 256;
		const char* srcpal = (char *)icinfo->lpbiInput + icinfo->lpbiInput->biSize;
		char* dstpal = palette;

		memset(palette, 0, sizeof palette);

		for(int i=0; i<entries; ++i) {
			dstpal[0] = srcpal[2];
			dstpal[1] = srcpal[1];
			dstpal[2] = srcpal[0];
			dstpal[3] = 0;
			dstpal += 4;
			srcpal += 4;
		}

		pal = palette;
	}

	codec->PrepareCompressFrame( flags, format, pal, icinfo->lpOutput, 99999999);
	char *readPt = (char *)icinfo->lpInput + pitch*(lpbiIn->biHeight - 1);
	for(i = 0;i<lpbiIn->biHeight;i++) {
		codec->CompressLines(1, (void **)&readPt );
		readPt -= pitch;
	}
	lpbiOut->biSizeImage = codec->FinishCompressFrame();

	if (flags & 1)
		*icinfo->lpdwFlags = AVIIF_KEYFRAME;
	else
		*icinfo->lpdwFlags = 0;

	return ICERR_OK;
}

Example #4

File: zmbv_vfw.cpp Project: joncampbell123/dosbox-x

DWORD CodecInst::CompressGetSize(LPBITMAPINFOHEADER lpbiIn, LPBITMAPINFOHEADER lpbiOut) {
	if (!CanCompress(lpbiIn, lpbiOut, true))
		return ICERR_BADFORMAT;
	return lpbiIn->biWidth * lpbiIn->biHeight * lpbiIn->biBitCount/8 + 1024;
}

Example #5

File: zmbv_vfw.cpp Project: joncampbell123/dosbox-x

DWORD CodecInst::CompressQuery(LPBITMAPINFOHEADER lpbiIn, LPBITMAPINFOHEADER lpbiOut) {
	if (CanCompress(lpbiIn,lpbiOut,false)) return ICERR_OK;
	return ICERR_BADFORMAT;
}