| /* |
| Copyright (c) 2011 Stanislav Vitvitskiy |
| |
| Permission is hereby granted, free of charge, to any person obtaining a copy of this |
| software and associated documentation files (the "Software"), to deal in the Software |
| without restriction, including without limitation the rights to use, copy, modify, |
| merge, publish, distribute, sublicense, and/or sell copies of the Software, and to |
| permit persons to whom the Software is furnished to do so, subject to the following |
| conditions: |
| |
| The above copyright notice and this permission notice shall be included in all copies or |
| substantial portions of the Software. |
| |
| THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, |
| INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR |
| PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE |
| FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, |
| TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE |
| OR OTHER DEALINGS IN THE SOFTWARE. |
| */ |
| package com.googlecode.mp4parser.h264.write; |
| |
| import com.googlecode.mp4parser.h264.Debug; |
| |
| import java.io.IOException; |
| import java.io.OutputStream; |
| |
| |
| /** |
| * A class responsible for outputting exp-Golumb values into binary stream |
| * |
| * @author Stanislav Vitvitskiy |
| */ |
| public class CAVLCWriter extends BitstreamWriter { |
| |
| public CAVLCWriter(OutputStream out) { |
| super(out); |
| } |
| |
| public void writeU(int value, int n, String string) throws IOException { |
| Debug.print(string + "\t"); |
| writeNBit(value, n); |
| Debug.println("\t" + value); |
| } |
| |
| public void writeUE(int value) throws IOException { |
| int bits = 0; |
| int cumul = 0; |
| for (int i = 0; i < 15; i++) { |
| if (value < cumul + (1 << i)) { |
| bits = i; |
| break; |
| } |
| cumul += (1 << i); |
| } |
| writeNBit(0, bits); |
| write1Bit(1); |
| writeNBit(value - cumul, bits); |
| } |
| |
| public void writeUE(int value, String string) throws IOException { |
| Debug.print(string + "\t"); |
| writeUE(value); |
| Debug.println("\t" + value); |
| } |
| |
| public void writeSE(int value, String string) throws IOException { |
| Debug.print(string + "\t"); |
| writeUE((value << 1) * (value < 0 ? -1 : 1) + (value > 0 ? 1 : 0)); |
| Debug.println("\t" + value); |
| } |
| |
| public void writeBool(boolean value, String string) throws IOException { |
| Debug.print(string + "\t"); |
| write1Bit(value ? 1 : 0); |
| Debug.println("\t" + value); |
| } |
| |
| public void writeU(int i, int n) throws IOException { |
| writeNBit(i, n); |
| } |
| |
| public void writeNBit(long value, int n, String string) throws IOException { |
| Debug.print(string + "\t"); |
| for (int i = 0; i < n; i++) { |
| write1Bit((int) (value >> (n - i - 1)) & 0x1); |
| } |
| Debug.println("\t" + value); |
| } |
| |
| public void writeTrailingBits() throws IOException { |
| write1Bit(1); |
| writeRemainingZero(); |
| flush(); |
| } |
| |
| public void writeSliceTrailingBits() { |
| throw new IllegalStateException("todo"); |
| } |
| } |