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https://github.com/claunia/cuetools.net.git
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CUETools.Codecs.FLAKE: split classes into separate files.
This commit is contained in:
karamanolev
@@ -18,11 +18,7 @@
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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using System;
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using System.Collections.Generic;
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using System.Text;
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using CUETools.Codecs;
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namespace CUETools.Codecs.FLAKE
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{
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@@ -70,300 +66,4 @@ namespace CUETools.Codecs.FLAKE
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return (WindowFunction)(Enum.Parse(typeof(WindowFunction), name, true));
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}
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}
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unsafe public class RiceContext
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{
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public RiceContext()
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{
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rparams = new int[Flake.MAX_PARTITIONS];
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esc_bps = new int[Flake.MAX_PARTITIONS];
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}
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/// <summary>
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/// partition order
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/// </summary>
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public int porder;
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/// <summary>
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/// coding method: rice parameters use 4 bits for coding_method 0 and 5 bits for coding_method 1
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/// </summary>
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public int coding_method;
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/// <summary>
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/// Rice parameters
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/// </summary>
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public int[] rparams;
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/// <summary>
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/// bps if using escape code
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/// </summary>
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public int[] esc_bps;
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};
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unsafe public class FlacSubframe
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{
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public FlacSubframe()
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{
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rc = new RiceContext();
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coefs = new int[lpc.MAX_LPC_ORDER];
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}
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public SubframeType type;
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public int order;
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public int* residual;
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public RiceContext rc;
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public uint size;
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public int cbits;
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public int shift;
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public int[] coefs;
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public int window;
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};
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unsafe public class FlacSubframeInfo
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{
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public FlacSubframeInfo()
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{
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best = new FlacSubframe();
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lpc_ctx = new LpcContext[lpc.MAX_LPC_WINDOWS];
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for (int i = 0; i < lpc.MAX_LPC_WINDOWS; i++)
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lpc_ctx[i] = new LpcContext();
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}
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public void Init(int* s, int* r, int bps, int w)
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{
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if (w > bps)
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throw new Exception("internal error");
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samples = s;
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obits = bps - w;
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wbits = w;
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best.residual = r;
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best.type = SubframeType.Verbatim;
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best.size = AudioSamples.UINT32_MAX;
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for (int iWindow = 0; iWindow < lpc.MAX_LPC_WINDOWS; iWindow++)
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lpc_ctx[iWindow].Reset();
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done_fixed = 0;
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}
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public FlacSubframe best;
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public int obits;
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public int wbits;
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public int* samples;
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public uint done_fixed;
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public LpcContext[] lpc_ctx;
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};
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unsafe public class FlacFrame
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{
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public FlacFrame(int subframes_count)
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{
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subframes = new FlacSubframeInfo[subframes_count];
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for (int ch = 0; ch < subframes_count; ch++)
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subframes[ch] = new FlacSubframeInfo();
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current = new FlacSubframe();
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}
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public void InitSize(int bs, bool vbs)
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{
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blocksize = bs;
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int i = 15;
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if (!vbs)
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{
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for (i = 0; i < 15; i++)
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{
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if (bs == Flake.flac_blocksizes[i])
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{
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bs_code0 = i;
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bs_code1 = -1;
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break;
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}
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}
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}
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if (i == 15)
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{
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if (blocksize <= 256)
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{
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bs_code0 = 6;
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bs_code1 = blocksize - 1;
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}
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else
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{
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bs_code0 = 7;
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bs_code1 = blocksize - 1;
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}
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}
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}
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public void ChooseBestSubframe(int ch)
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{
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if (current.size >= subframes[ch].best.size)
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return;
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FlacSubframe tmp = subframes[ch].best;
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subframes[ch].best = current;
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current = tmp;
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}
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public void SwapSubframes(int ch1, int ch2)
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{
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FlacSubframeInfo tmp = subframes[ch1];
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subframes[ch1] = subframes[ch2];
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subframes[ch2] = tmp;
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}
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/// <summary>
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/// Swap subframes according to channel mode.
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/// It is assumed that we have 4 subframes,
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/// 0 is right, 1 is left, 2 is middle, 3 is difference
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/// </summary>
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public void ChooseSubframes()
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{
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switch (ch_mode)
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{
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case ChannelMode.MidSide:
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SwapSubframes(0, 2);
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SwapSubframes(1, 3);
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break;
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case ChannelMode.RightSide:
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SwapSubframes(0, 3);
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break;
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case ChannelMode.LeftSide:
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SwapSubframes(1, 3);
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break;
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}
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}
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public int blocksize;
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public int bs_code0, bs_code1;
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public ChannelMode ch_mode;
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//public int ch_order0, ch_order1;
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public byte crc8;
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public FlacSubframeInfo[] subframes;
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public int frame_number;
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public FlacSubframe current;
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public float* window_buffer;
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public BitWriter writer = null;
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public int writer_offset = 0;
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}
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public enum OrderMethod
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{
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/// <summary>
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/// Select orders based on Akaike's criteria
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/// </summary>
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Akaike = 0
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}
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/// <summary>
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/// Type of linear prediction
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/// </summary>
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public enum PredictionType
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{
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/// <summary>
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/// Verbatim
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/// </summary>
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None = 0,
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/// <summary>
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/// Fixed prediction only
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/// </summary>
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Fixed = 1,
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/// <summary>
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/// Levinson-Durbin recursion
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/// </summary>
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Levinson = 2,
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/// <summary>
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/// Exhaustive search
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/// </summary>
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Search = 3
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}
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public enum StereoMethod
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{
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Independent = 0,
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Estimate = 1,
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Evaluate = 2,
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Search = 3
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}
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public enum WindowMethod
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{
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Estimate = 0,
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Evaluate = 1,
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Search = 2
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}
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public enum SubframeType
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{
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Constant = 0,
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Verbatim = 1,
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Fixed = 8,
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LPC = 32
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};
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public enum ChannelMode
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{
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NotStereo = 0,
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LeftRight = 1,
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LeftSide = 8,
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RightSide = 9,
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MidSide = 10
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}
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public enum WindowFunction
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{
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Welch = 1,
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Tukey = 2,
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Hann = 4,
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Flattop = 8,
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Bartlett = 16,
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TukeyFlattop = 10
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}
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public struct SeekPoint
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{
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public long number;
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public long offset;
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public int framesize;
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}
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public enum MetadataType
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{
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/// <summary>
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/// <A HREF="../format.html#metadata_block_streaminfo">STREAMINFO</A> block
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/// </summary>
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StreamInfo = 0,
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/// <summary>
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/// <A HREF="../format.html#metadata_block_padding">PADDING</A> block
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/// </summary>
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Padding = 1,
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/// <summary>
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/// <A HREF="../format.html#metadata_block_application">APPLICATION</A> block
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/// </summary>
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Application = 2,
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/// <summary>
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/// <A HREF="../format.html#metadata_block_seektable">SEEKTABLE</A> block
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/// </summary>
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Seektable = 3,
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/// <summary>
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/// <A HREF="../format.html#metadata_block_vorbis_comment">VORBISCOMMENT</A> block (a.k.a. FLAC tags)
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/// </summary>
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VorbisComment = 4,
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/// <summary>
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/// <A HREF="../format.html#metadata_block_cuesheet">CUESHEET</A> block
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/// </summary>
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CUESheet = 5,
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/// <summary>
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/// <A HREF="../format.html#metadata_block_picture">PICTURE</A> block
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/// </summary>
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Picture = 6,
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/// <summary>
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/// marker to denote beginning of undefined type range; this number will increase as new metadata types are added
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/// </summary>
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Undefined = 7
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};
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}
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