CUETools.Codecs.FLAKE.FlakeWriter.flake_encode_init C# (CSharp) Méthode

		int flake_encode_init()
		{
			int i, header_len;

			//if(flake_validate_params(s) < 0)

			ch_code = channels - 1;

			// find samplerate in table
			for (i = 4; i < 12; i++)
			{
				if (_pcm.SampleRate == Flake.flac_samplerates[i])
				{
					sr_code0 = i;
					break;
				}
			}

			// if not in table, samplerate is non-standard
			if (i == 12)
				throw new Exception("non-standard samplerate");

			for (i = 1; i < 8; i++)
			{
				if (_pcm.BitsPerSample == Flake.flac_bitdepths[i])
				{
					bps_code = i;
					break;
				}
			}
			if (i == 8)
				throw new Exception("non-standard bps");

			if (_blocksize == 0)
			{
				if (eparams.block_size == 0)
					eparams.block_size = select_blocksize(_pcm.SampleRate, eparams.block_time_ms);
				_blocksize = eparams.block_size;
			}
			else
				eparams.block_size = _blocksize;

			// set maximum encoded frame size (if larger, re-encodes in verbatim mode)
			if (channels == 2)
				max_frame_size = 16 + ((eparams.block_size * (_pcm.BitsPerSample + _pcm.BitsPerSample + 1) + 7) >> 3);
			else
				max_frame_size = 16 + ((eparams.block_size * channels * _pcm.BitsPerSample + 7) >> 3);

			if (_IO.CanSeek && eparams.do_seektable && sample_count > 0)
			{
				int seek_points_distance = _pcm.SampleRate * 10;
				int num_seek_points = 1 + sample_count / seek_points_distance; // 1 seek point per 10 seconds
				if (sample_count % seek_points_distance == 0)
					num_seek_points--;
				seek_table = new SeekPoint[num_seek_points];
				for (int sp = 0; sp < num_seek_points; sp++)
				{
					seek_table[sp].framesize = 0;
					seek_table[sp].offset = 0;
					seek_table[sp].number = sp * seek_points_distance;
				}
			}

			// output header bytes
			header = new byte[eparams.padding_size + 1024 + (seek_table == null ? 0 : seek_table.Length * 18)];
			header_len = write_headers();

			// initialize CRC & MD5
			if (_IO.CanSeek && _settings.DoMD5)
				md5 = new MD5CryptoServiceProvider();

			if (_settings.DoVerify)
			{
				verify = new FlakeReader(_pcm);
				verifyBuffer = new int[Flake.MAX_BLOCKSIZE * channels];
			}

			frame_buffer = new byte[max_frame_size];

			return header_len;
		}
	}