C++ path::c_str方法代码示例

/// @brief Constructor
/// @param filename The filename to open
YUV4MPEGVideoProvider::YUV4MPEGVideoProvider(agi::fs::path const& filename, std::string const&) {
	fps_rat.num = -1;
	fps_rat.den = 1;

	try {
#ifdef WIN32
		sf = _wfopen(filename.c_str(), L"rb");
#else
		sf = fopen(filename.c_str(), "rb");
#endif

		if (!sf) throw agi::fs::FileNotFound(filename);

		CheckFileFormat();

		ParseFileHeader(ReadHeader(0));

		if (w <= 0 || h <= 0)
			throw VideoOpenError("Invalid resolution");
		if (fps_rat.num <= 0 || fps_rat.den <= 0) {
			fps_rat.num = 25;
			fps_rat.den = 1;
			LOG_D("provider/video/yuv4mpeg") << "framerate info unavailable, assuming 25fps";
		}
		if (pixfmt == Y4M_PIXFMT_NONE)
			pixfmt = Y4M_PIXFMT_420JPEG;
		if (imode == Y4M_ILACE_NOTSET)
			imode = Y4M_ILACE_UNKNOWN;

		luma_sz = w * h;
		switch (pixfmt) {
		case Y4M_PIXFMT_420JPEG:
		case Y4M_PIXFMT_420MPEG2:
		case Y4M_PIXFMT_420PALDV:
			chroma_sz	= (w * h) >> 2; break;
		case Y4M_PIXFMT_422:
			chroma_sz	= (w * h) >> 1; break;
			/// @todo add support for more pixel formats
		default:
			throw VideoOpenError("Unsupported pixel format");
		}
		frame_sz	= luma_sz + chroma_sz*2;

		num_frames = IndexFile();
		if (num_frames <= 0 || seek_table.empty())
			throw VideoOpenError("Unable to determine file length");

		fseeko(sf, 0, SEEK_SET);
	}
	catch (...) {
		if (sf) fclose(sf);
		throw;
	}
}

AvisynthVideoProvider::AvisynthVideoProvider(agi::fs::path const& filename, std::string const& colormatrix)
{
	agi::acs::CheckFileRead(filename);

	std::lock_guard<std::mutex> lock(avs.GetMutex());

#ifdef _WIN32
	if (agi::fs::HasExtension(filename, "avi")) {
		// Try to read the keyframes before actually opening the file as trying
		// to open the file while it's already open can cause problems with
		// badly written VFW decoders
		AVIFileInit();

		PAVIFILE pfile;
		long hr = AVIFileOpen(&pfile, filename.c_str(), OF_SHARE_DENY_WRITE, 0);
		if (hr) {
			warning = "Unable to open AVI file for reading keyframes:\n";
			switch (hr) {
				case AVIERR_BADFORMAT:
					warning += "The file is corrupted, incomplete or has an otherwise bad format.";
					break;
				case AVIERR_MEMORY:
					warning += "The file could not be opened because of insufficient memory.";
					break;
				case AVIERR_FILEREAD:
					warning += "An error occurred reading the file. There might be a problem with the storage media.";
					break;
				case AVIERR_FILEOPEN:
					warning += "The file could not be opened. It might be in use by another application, or you do not have permission to access it.";
					break;
				case REGDB_E_CLASSNOTREG:
					warning += "There is no handler installed for the file extension. This might indicate a fundamental problem in your Video for Windows installation, and can be caused by extremely stripped Windows installations.";
					break;
				default:
					warning += "Unknown error.";
					break;
			}
			goto file_exit;
		}

		PAVISTREAM ppavi;
		if (hr = AVIFileGetStream(pfile, &ppavi, streamtypeVIDEO, 0)) {
			warning = "Unable to open AVI video stream for reading keyframes:\n";
			switch (hr) {
				case AVIERR_NODATA:
					warning += "The file does not contain a usable video stream.";
					break;
				case AVIERR_MEMORY:
					warning += "Not enough memory.";
					break;
				default:
					warning += "Unknown error.";
					break;
			}
			goto file_release;
		}

		AVISTREAMINFO avis;
		if (FAILED(AVIStreamInfo(ppavi,&avis,sizeof(avis)))) {
			warning = "Unable to read keyframes from AVI file:\nCould not get stream information.";
			goto stream_release;
		}

		for (size_t i = 0; i < avis.dwLength; i++) {
			if (AVIStreamIsKeyFrame(ppavi, i))
				keyframes.push_back(i);
		}

		// If every frame is a keyframe then just discard the keyframe data as it's useless
		if (keyframes.size() == (size_t)avis.dwLength)
			keyframes.clear();

		// Clean up
stream_release:
		AVIStreamRelease(ppavi);
file_release:
		AVIFileRelease(pfile);
file_exit:
		AVIFileExit();
	}
#endif

	try {
		auto script = Open(filename);

		// Check if video was loaded properly
		if (!script.IsClip() || !script.AsClip()->GetVideoInfo().HasVideo())
			throw VideoNotSupported("No usable video found");

		vi = script.AsClip()->GetVideoInfo();
		if (!vi.IsRGB()) {
			/// @todo maybe read ColorMatrix hints for d2v files?
			AVSValue args[2] = { script, "Rec601" };
			bool force_bt601 = OPT_GET("Video/Force BT.601")->GetBool() || colormatrix == "TV.601";
			bool bt709 = vi.width > 1024 || vi.height >= 600;
			if (bt709 && (!force_bt601 || colormatrix == "TV.709")) {
				args[1] = "Rec709";
				colorspace = "TV.709";
			}
			else
//.........这里部分代码省略.........