1 files changed, 120 insertions, 0 deletions

diff --git a/songdbj/javazoom/spi/mpeg/sampled/convert/MpegFormatConversionProvider.java b/songdbj/javazoom/spi/mpeg/sampled/convert/MpegFormatConversionProvider.java
new file mode 100644
index 0000000000..1a3d51d9ad
--- /dev/null
+++ b/songdbj/javazoom/spi/mpeg/sampled/convert/MpegFormatConversionProvider.java
@@ -0,0 +1,120 @@
+/*
+ *   MpegFormatConversionProvider.
+ * 
+ * JavaZOOM : mp3spi@javazoom.net
+ *                        http://www.javazoom.net
+ * 
+ * --------------------------------------------------------------------------- 
+ *   This program is free software; you can redistribute it and/or modify
+ *   it under the terms of the GNU Library General Public License as published
+ *   by the Free Software Foundation; either version 2 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *   GNU Library General Public License for more details.
+ *
+ *   You should have received a copy of the GNU Library General Public
+ *   License along with this program; if not, write to the Free Software
+ *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ * --------------------------------------------------------------------------
+ */
+
+
+package javazoom.spi.mpeg.sampled.convert;
+
+
+import java.util.Arrays;
+
+import javax.sound.sampled.AudioFormat;
+import javax.sound.sampled.AudioInputStream;
+import javax.sound.sampled.AudioSystem;
+
+import javazoom.spi.mpeg.sampled.file.MpegEncoding;
+
+import org.tritonus.share.TDebug;
+import org.tritonus.share.sampled.Encodings;
+import org.tritonus.share.sampled.convert.TEncodingFormatConversionProvider;
+
+/**
+ * ConversionProvider for MPEG files.
+  */
+public class MpegFormatConversionProvider extends TEncodingFormatConversionProvider
+{
+        private static final AudioFormat.Encoding       MP3 = Encodings.getEncoding("MP3");
+        private static final AudioFormat.Encoding       PCM_SIGNED = Encodings.getEncoding("PCM_SIGNED");
+
+        private static final AudioFormat[]      INPUT_FORMATS =
+        {
+                // mono
+                new AudioFormat(MP3, -1.0F, -1, 1, -1, -1.0F, false),
+                new AudioFormat(MP3, -1.0F, -1, 1, -1, -1.0F, true),
+                // stereo
+                new AudioFormat(MP3, -1.0F, -1, 2, -1, -1.0F, false),
+                new AudioFormat(MP3, -1.0F, -1, 2, -1, -1.0F, true),
+        };
+
+
+        private static final AudioFormat[]      OUTPUT_FORMATS =
+        {
+                // mono, 16 bit signed
+                new AudioFormat(PCM_SIGNED, -1.0F, 16, 1, 2, -1.0F, false),
+                new AudioFormat(PCM_SIGNED, -1.0F, 16, 1, 2, -1.0F, true),
+                // stereo, 16 bit signed
+                new AudioFormat(PCM_SIGNED, -1.0F, 16, 2, 4, -1.0F, false),
+                new AudioFormat(PCM_SIGNED, -1.0F, 16, 2, 4, -1.0F, true),
+        };
+
+        /**     
+         * Constructor.
+         */
+        public MpegFormatConversionProvider()
+        {
+                super(Arrays.asList(INPUT_FORMATS), Arrays.asList(OUTPUT_FORMATS));
+                if (TDebug.TraceAudioConverter) 
+                {
+                        TDebug.out(">MpegFormatConversionProvider()");
+                }
+        }
+
+        public AudioInputStream getAudioInputStream(AudioFormat targetFormat, AudioInputStream audioInputStream)
+        {
+                if (TDebug.TraceAudioConverter) 
+                {
+                        TDebug.out(">MpegFormatConversionProvider.getAudioInputStream(AudioFormat targetFormat, AudioInputStream audioInputStream):");
+                }
+                return new DecodedMpegAudioInputStream(targetFormat, audioInputStream);
+        }
+
+        /**
+         * Add conversion support for any MpegEncoding source with FrameRate or FrameSize not empty.
+         * @param targetFormat
+         * @param sourceFormat
+         * @return
+         */
+        public boolean isConversionSupported(AudioFormat targetFormat, AudioFormat sourceFormat)
+        {
+                if (TDebug.TraceAudioConverter) 
+                {
+                                        TDebug.out(">MpegFormatConversionProvider.isConversionSupported(AudioFormat targetFormat, AudioFormat sourceFormat):");
+                                        TDebug.out("checking if conversion possible");
+                                        TDebug.out("from: " + sourceFormat);
+                                        TDebug.out("to: " + targetFormat);
+                }
+
+                boolean conversion = super.isConversionSupported(targetFormat, sourceFormat);
+                if (conversion == false)
+                {
+                        AudioFormat.Encoding enc = sourceFormat.getEncoding();
+                        if (enc instanceof MpegEncoding)
+                        {
+                                if ((sourceFormat.getFrameRate() != AudioSystem.NOT_SPECIFIED) || (sourceFormat.getFrameSize() != AudioSystem.NOT_SPECIFIED))
+                                {
+                                        conversion = true;
+                                }
+                        }
+                }
+                return conversion;
+        }
+}