diff options
Diffstat (limited to 'isoparser/src/main/java/com/googlecode/mp4parser/h264/write/BitstreamWriter.java')
| -rw-r--r-- | isoparser/src/main/java/com/googlecode/mp4parser/h264/write/BitstreamWriter.java | 108 |
1 files changed, 108 insertions, 0 deletions
diff --git a/isoparser/src/main/java/com/googlecode/mp4parser/h264/write/BitstreamWriter.java b/isoparser/src/main/java/com/googlecode/mp4parser/h264/write/BitstreamWriter.java new file mode 100644 index 0000000..b382400 --- /dev/null +++ b/isoparser/src/main/java/com/googlecode/mp4parser/h264/write/BitstreamWriter.java @@ -0,0 +1,108 @@ +/* +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 dummy implementation of H264 RBSP output stream + * + * @author Stanislav Vitvitskiy + */ +public class BitstreamWriter { + + private final OutputStream os; + private int[] curByte = new int[8]; + private int curBit; + + public BitstreamWriter(OutputStream out) { + this.os = out; + } + + /* + * (non-Javadoc) + * + * @see ua.org.jplayer.javcodec.h264.H264BitOutputStream#flush() + */ + public void flush() throws IOException { + for (int i = curBit; i < 8; i++) { + curByte[i] = 0; + } + curBit = 0; + writeCurByte(); + } + + private void writeCurByte() throws IOException { + int toWrite = (curByte[0] << 7) | (curByte[1] << 6) | (curByte[2] << 5) + | (curByte[3] << 4) | (curByte[4] << 3) | (curByte[5] << 2) + | (curByte[6] << 1) | curByte[7]; + os.write(toWrite); + } + + /* + * (non-Javadoc) + * + * @see ua.org.jplayer.javcodec.h264.H264BitOutputStream#write1Bit(int) + */ + public void write1Bit(int value) throws IOException { + Debug.print(value); + if (curBit == 8) { + curBit = 0; + writeCurByte(); + } + curByte[curBit++] = value; + } + + /* + * (non-Javadoc) + * + * @see ua.org.jplayer.javcodec.h264.H264BitOutputStream#writeNBit(long, + * int) + */ + public void writeNBit(long value, int n) throws IOException { + for (int i = 0; i < n; i++) { + write1Bit((int) (value >> (n - i - 1)) & 0x1); + } + } + + /* + * (non-Javadoc) + * + * @see + * ua.org.jplayer.javcodec.h264.H264BitOutputStream#writeRemainingZero() + */ + public void writeRemainingZero() throws IOException { + writeNBit(0, 8 - curBit); + } + + /* + * (non-Javadoc) + * + * @see ua.org.jplayer.javcodec.h264.H264BitOutputStream#writeByte(int) + */ + public void writeByte(int b) throws IOException { + os.write(b); + + } +}
\ No newline at end of file |