?? rateconvertertest.java
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package net.sf.fmj.media.codec.audio;import javax.media.Buffer;import javax.media.Codec;import javax.media.Format;import javax.media.format.AudioFormat;import junit.framework.TestCase;import net.sf.fmj.codegen.MediaCGUtils;/** * * @author Ken Larson * */public class RateConverterTest extends TestCase { /** test non-changing conversion, 8-bit signed */ public void test1() { for (int i = 0; i < 256; ++i) { byte[] inputBufferData = new byte[] {(byte) i}; test( new AudioFormat(AudioFormat.LINEAR, 4000.0, 8, 1, -1, AudioFormat.SIGNED, 8, 4000.0, Format.byteArray), new AudioFormat(AudioFormat.LINEAR, 4000.0, 8, 1, -1, AudioFormat.SIGNED, 8, 4000.0, Format.byteArray), inputBufferData, inputBufferData ); } } /** test non-changing conversion, 8-bit signed */ public void test2() { for (int i = 0; i < 256; ++i) { byte[] inputBufferData = new byte[] {0, (byte) i}; test( new AudioFormat(AudioFormat.LINEAR, 4000.0, 8, 1, -1, AudioFormat.SIGNED, 8, 4000.0, Format.byteArray), new AudioFormat(AudioFormat.LINEAR, 4000.0, 8, 1, -1, AudioFormat.SIGNED, 8, 4000.0, Format.byteArray), inputBufferData, inputBufferData ); } } final int[] endianValues = new int[] {AudioFormat.BIG_ENDIAN, AudioFormat.LITTLE_ENDIAN}; final int[] signedValues = new int[] {AudioFormat.SIGNED, AudioFormat.UNSIGNED}; /** Test non-changing conversion, 16-bit, iterate through endian, signed. */ public void test3() { for (int i = 0; i < 256; ++i) { final byte[] inputBufferData = new byte[] {0, (byte) i, (byte) i, 0}; for (int k = 0; k < endianValues.length; ++k) { final int endian = endianValues[k]; for (int m = 0; m < signedValues.length; ++m) { final int signed = signedValues[m]; test( new AudioFormat(AudioFormat.LINEAR, 4000.0, 16, 1, endian, signed, 16, 4000.0, Format.byteArray), new AudioFormat(AudioFormat.LINEAR, 4000.0, 16, 1, endian, signed, 16, 4000.0, Format.byteArray), inputBufferData, inputBufferData ); } } } } /** Test non-changing conversion, iterate through sample sizes, endian, signed. */ public void test4() { final int[] sampleSizesInBits = new int[] {8, 16}; for (int i = 0; i < 256; ++i) { final byte[] inputBufferData = new byte[] {0, (byte) i, 0, (byte) i}; for (int j = 0; j < sampleSizesInBits.length; ++j) { final int sampleSizeInBits = sampleSizesInBits[j]; for (int k = 0; k < endianValues.length; ++k) { final int endian = endianValues[k]; for (int m = 0; m < signedValues.length; ++m) { final int signed = signedValues[m]; test(new AudioFormat(AudioFormat.LINEAR, 4000.0, sampleSizeInBits, 1, endian, signed, sampleSizeInBits, 4000.0, Format.byteArray), new AudioFormat(AudioFormat.LINEAR, 4000.0, sampleSizeInBits, 1, endian, signed, sampleSizeInBits, 4000.0, Format.byteArray), inputBufferData, inputBufferData ); } } } } } /** Test converting 16-bit to 8-bit, vary endian-ness */ public void test5() { for (int i = 0; i < 256; ++i) { final byte[] inputBufferData = new byte[] {0, (byte) i, (byte) i, 0}; for (int k = 0; k < endianValues.length; ++k) { final int endian = endianValues[k]; final byte[] outputBufferTargetData; if (endian == AudioFormat.LITTLE_ENDIAN) outputBufferTargetData = new byte[] {(byte) i, 0}; else outputBufferTargetData = new byte[] {0, (byte) i}; for (int m = 0; m < signedValues.length; ++m) { final int signed = signedValues[m]; test( new AudioFormat(AudioFormat.LINEAR, 4000.0, 16, 1, endian, signed, 16, 4000.0, Format.byteArray), new AudioFormat(AudioFormat.LINEAR, 4000.0, 8, 1, endian, signed, 8, 4000.0, Format.byteArray), inputBufferData, outputBufferTargetData ); } } } } /** Test conversion of 8-bit to 16-bit, iterate through endian. */ public void test6() { for (int i = 0; i < 256; ++i) { final byte[] inputBufferData = new byte[] {(byte) i, 0}; for (int k = 0; k < endianValues.length; ++k) { final int endian = endianValues[k]; final byte[] outputBufferTargetData; if (endian == AudioFormat.BIG_ENDIAN) outputBufferTargetData = new byte[] {(byte) i, 0, 0, 0}; else outputBufferTargetData = new byte[] {0, (byte) i, 0, 0}; for (int m = 0; m < signedValues.length; ++m) { final int signed = signedValues[m]; test( new AudioFormat(AudioFormat.LINEAR, 4000.0, 8, 1, endian, signed, 8, 4000.0, Format.byteArray), new AudioFormat(AudioFormat.LINEAR, 4000.0, 16, 1, endian, signed, 16, 4000.0, Format.byteArray), inputBufferData, outputBufferTargetData ); } } } } // TODO: test sample rate conversion /** Test sample rate conversion - halving */ public void test7() { for (int i = 0; i < 256; ++i) { byte[] inputBufferData = new byte[] {(byte) i, (byte) i, 0, 2}; byte[] targetOutputBufferData = new byte[] {(byte) i, 1}; test( new AudioFormat(AudioFormat.LINEAR, 8000.0, 8, 1, -1, AudioFormat.SIGNED, 8, 8000.0, Format.byteArray), new AudioFormat(AudioFormat.LINEAR, 4000.0, 8, 1, -1, AudioFormat.SIGNED, 8, 4000.0, Format.byteArray), inputBufferData, targetOutputBufferData ); } } /** Test sample rate conversion - doubling */ public void test8() { for (int i = 0; i < 256; ++i) { byte[] inputBufferData = new byte[] {(byte) i, 0, 2}; byte[] targetOutputBufferData = new byte[] {(byte) i, (byte) i, 0, 0, 2, 2}; test( new AudioFormat(AudioFormat.LINEAR, 4000.0, 8, 1, -1, AudioFormat.SIGNED, 8, 4000.0, Format.byteArray), new AudioFormat(AudioFormat.LINEAR, 8000.0, 8, 1, -1, AudioFormat.SIGNED, 8, 8000.0, Format.byteArray), inputBufferData, targetOutputBufferData ); } } /** Test sample rate conversion - 3:2 */ public void test9() { { byte[] inputBufferData = new byte[] {2, 4, 6, 8, 10, 12}; byte[] targetOutputBufferData = new byte[] {3, 5, 9, 11}; // (2 + (4/2)) / 1.5 = 2.67 = 3 rounded // ((4/2) + 6) / 1.5 = 5.33 = 5 rounded // (8 + (10/2)) / 1.5 = 8.67 = 9 rounded // (10/2) + 12 / 1.5 = 11.33 = 11 rounded test( new AudioFormat(AudioFormat.LINEAR, 3000.0, 8, 1, -1, AudioFormat.SIGNED, 8, 3000.0, Format.byteArray), new AudioFormat(AudioFormat.LINEAR, 2000.0, 8, 1, -1, AudioFormat.SIGNED, 8, 2000.0, Format.byteArray), inputBufferData, targetOutputBufferData ); } } /** Test sample rate conversion - 3:2 */ public void test10() { { byte[] inputBufferData = new byte[] {2, 4, 6, 8, 10, 12, 14}; byte[] targetOutputBufferData = new byte[] {3, 5, 9, 11}; // (2 + (4/2)) / 1.5 = 2.67 = 3 rounded // ((4/2) + 6) / 1.5 = 5.33 = 5 rounded // (8 + (10/2)) / 1.5 = 8.67 = 9 rounded // (10/2) + 12 / 1.5 = 11.33 = 11 rounded test( new AudioFormat(AudioFormat.LINEAR, 3000.0, 8, 1, -1, AudioFormat.SIGNED, 8, 3000.0, Format.byteArray), new AudioFormat(AudioFormat.LINEAR, 2000.0, 8, 1, -1, AudioFormat.SIGNED, 8, 2000.0, Format.byteArray), inputBufferData, targetOutputBufferData ); } } /** Test sample rate conversion - 3:2 */ public void test11() { { byte[] inputBufferData = new byte[] {2, 4, 6, 8, 10, 12, 14, 16}; byte[] targetOutputBufferData = new byte[] {3, 5, 9, 11, 15}; // (2 + (4/2)) / 1.5 = 2.67 = 3 rounded // ((4/2) + 6) / 1.5 = 5.33 = 5 rounded // (8 + (10/2)) / 1.5 = 8.67 = 9 rounded // (10/2) + 12 / 1.5 = 11.33 = 11 rounded // (14 * (16/2)) / 1.5 = 14.67 = 15 rounded test( new AudioFormat(AudioFormat.LINEAR, 3000.0, 8, 1, -1, AudioFormat.SIGNED, 8, 3000.0, Format.byteArray), new AudioFormat(AudioFormat.LINEAR, 2000.0, 8, 1, -1, AudioFormat.SIGNED, 8, 2000.0, Format.byteArray), inputBufferData, targetOutputBufferData ); } } /** Test sample rate conversion - 2:3 */ public void test12() { { byte[] inputBufferData = new byte[] {2, 4}; byte[] targetOutputBufferData = new byte[] {2, 3, 4}; test( new AudioFormat(AudioFormat.LINEAR, 2000.0, 8, 1, -1, AudioFormat.SIGNED, 8, 2000.0, Format.byteArray), new AudioFormat(AudioFormat.LINEAR, 3000.0, 8, 1, -1, AudioFormat.SIGNED, 8, 3000.0, Format.byteArray), inputBufferData, targetOutputBufferData ); } } /** Test sample rate conversion - 2:3 */ public void test13() { { byte[] inputBufferData = new byte[] {2, 4, 6}; byte[] targetOutputBufferData = new byte[] {2, 3, 4, 6}; test( new AudioFormat(AudioFormat.LINEAR, 2000.0, 8, 1, -1, AudioFormat.SIGNED, 8, 2000.0, Format.byteArray), new AudioFormat(AudioFormat.LINEAR, 3000.0, 8, 1, -1, AudioFormat.SIGNED, 8, 3000.0, Format.byteArray), inputBufferData, targetOutputBufferData ); } } /** Test sample rate conversion - 2:3 */ public void test14() { { byte[] inputBufferData = new byte[] {2, 4, 6, 8}; byte[] targetOutputBufferData = new byte[] {2, 3, 4, 6, 7, 8}; test( new AudioFormat(AudioFormat.LINEAR, 2000.0, 8, 1, -1, AudioFormat.SIGNED, 8, 2000.0, Format.byteArray), new AudioFormat(AudioFormat.LINEAR, 3000.0, 8, 1, -1, AudioFormat.SIGNED, 8, 3000.0, Format.byteArray), inputBufferData, targetOutputBufferData ); } } /** Test sample rate conversion - 3:5 */ public void test14_5() { { byte[] inputBufferData = new byte[] {2, 4, 6}; byte[] targetOutputBufferData = new byte[] {2, 3, 4, 5, 6}; test( new AudioFormat(AudioFormat.LINEAR, 3000.0, 8, 1, -1, AudioFormat.SIGNED, 8, 2000.0, Format.byteArray), new AudioFormat(AudioFormat.LINEAR, 5000.0, 8, 1, -1, AudioFormat.SIGNED, 8, 3000.0, Format.byteArray), inputBufferData, targetOutputBufferData ); } } /** Test mono to stereo */ public void test15() { { byte[] inputBufferData = new byte[] {2, 4, 6, 8}; byte[] targetOutputBufferData = new byte[] {2, 2, 4, 4, 6, 6, 8, 8}; test( new AudioFormat(AudioFormat.LINEAR, 4000.0, 8, 1, -1, AudioFormat.SIGNED, 8, 4000.0, Format.byteArray), new AudioFormat(AudioFormat.LINEAR, 4000.0, 8, 2, -1, AudioFormat.SIGNED, 16, 4000.0, Format.byteArray), inputBufferData, targetOutputBufferData ); } } /** Test stereo to mono */ public void test16() { { byte[] inputBufferData = new byte[] {2, 4, 6, 8}; byte[] targetOutputBufferData = new byte[] {2, 6}; test( new AudioFormat(AudioFormat.LINEAR, 4000.0, 8, 2, -1, AudioFormat.SIGNED, 16, 4000.0, Format.byteArray), new AudioFormat(AudioFormat.LINEAR, 4000.0, 8, 1, -1, AudioFormat.SIGNED, 8, 4000.0, Format.byteArray), inputBufferData, targetOutputBufferData ); } } /** Test unsigned to signed */ public void test17() { { byte[] inputBufferData = new byte[] {0, 127, (byte) 128, (byte) 129, (byte) 255}; byte[] targetOutputBufferData = new byte[] {-128, -1, 0, 1, 127}; test( new AudioFormat(AudioFormat.LINEAR, 4000.0, 8, 1, -1, AudioFormat.UNSIGNED, 8, 4000.0, Format.byteArray), new AudioFormat(AudioFormat.LINEAR, 4000.0, 8, 1, -1, AudioFormat.SIGNED, 8, 4000.0, Format.byteArray), inputBufferData, targetOutputBufferData ); } } /** Test signed to unsigned */ public void test18() { { byte[] inputBufferData = new byte[] {-128, -1, 0, 1, 127}; byte[] targetOutputBufferData = new byte[] {0, 127, (byte) 128, (byte) 129, (byte) 255}; test( new AudioFormat(AudioFormat.LINEAR, 4000.0, 8, 1, -1, AudioFormat.SIGNED, 8, 4000.0, Format.byteArray), new AudioFormat(AudioFormat.LINEAR, 4000.0, 8, 1, -1, AudioFormat.UNSIGNED, 8, 4000.0, Format.byteArray), inputBufferData, targetOutputBufferData ); } } void test(Format inputFormat, Format outputFormat, byte[] inputBufferData, byte[] targetOutputBufferData) { RateConverter c = new RateConverter(); c.setInputFormat(inputFormat); c.setOutputFormat(outputFormat); c.open(); Buffer b = new Buffer(); b.setFormat(inputFormat); b.setData(inputBufferData); b.setOffset(0); b.setLength(inputBufferData.length); Buffer outputBuffer = new Buffer(); assertEquals(c.process(b, outputBuffer), Codec.BUFFER_PROCESSED_OK); assertEquals(outputBuffer.getOffset(), 0); byte[] outputBufferData = (byte[]) outputBuffer.getData(); if (outputBuffer.getLength() != targetOutputBufferData.length) { System.out.print("output:"); dump(outputBufferData, outputBuffer.getLength()); System.out.print("target:"); dump(targetOutputBufferData, targetOutputBufferData.length); } assertEquals(outputBuffer.getLength(), targetOutputBufferData.length); assertEquals(outputBuffer.getFlags(), 0); assertEquals(outputBuffer.getFormat(), outputFormat); boolean eq = true; for (int i = 0; i < outputBuffer.getLength(); ++i) { if (outputBufferData[i] != targetOutputBufferData[i]) { eq = false; break; } } if (!eq) { Buffer bClone = (Buffer) outputBuffer.clone(); bClone.setData(targetOutputBufferData); System.err.println("Target: " + MediaCGUtils.bufferToStr(bClone)); System.err.println("Actual: " + MediaCGUtils.bufferToStr(outputBuffer)); } for (int i = 0; i < outputBuffer.getLength(); ++i) { if (outputBufferData[i] != targetOutputBufferData[i]) { System.out.print("output:"); dump(outputBufferData, outputBuffer.getLength()); System.out.print("target:"); dump(targetOutputBufferData, targetOutputBufferData.length); } assertEquals(outputBufferData[i], targetOutputBufferData[i]); } c.close(); } private void dump(byte[] data, int len) { for (int i = 0; i < len; ++i) { if (i > 0) System.out.print(", "); System.out.print(data[i]); } System.out.println(); }}?? 快捷鍵說明
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