1 | lib 1004796 // mp3transform |
2 | |
3 | import org.mp3transform.Bitstream; |
4 | import org.mp3transform.Decoder; |
5 | import org.mp3transform.Header; |
6 | import org.mp3transform.wav.*; |
7 | |
8 | static void mp3ToWAV(S in, S out) ctex {
|
9 | mp3ToWAV(new File(in), new File(out)); |
10 | } |
11 | |
12 | static File mp3ToWAV(File in, File out) ctex {
|
13 | mp3ToWAV(new BufferedInputStream(new FileInputStream(in)), out); |
14 | ret out; |
15 | } |
16 | |
17 | static void mp3ToWAV(InputStream in, File out) ctex {
|
18 | class WavConverter extends Decoder {
|
19 | void convert(String sourceFileName, String destFileName) |
20 | throws IOException {
|
21 | InputStream fileIn = new FileInputStream(sourceFileName); |
22 | BufferedInputStream in = new BufferedInputStream(fileIn, 128 * 1024); |
23 | convert(in, destFileName); |
24 | in.close(); |
25 | } |
26 | |
27 | void convert(InputStream sourceStream, String destFileName) |
28 | throws IOException {
|
29 | int frameCount = Integer.MAX_VALUE; |
30 | WavConverter decoder = new WavConverter(); |
31 | Bitstream stream = new Bitstream(sourceStream); |
32 | frameCount = Integer.MAX_VALUE; |
33 | try {
|
34 | for (int frame = 0; frame < frameCount; frame++) {
|
35 | Header header = stream.readFrame(); |
36 | if (header == null) {
|
37 | break; |
38 | } |
39 | if (decoder.channels == 0) {
|
40 | int channels = (header.mode() == Header.MODE_SINGLE_CHANNEL) ? 1 |
41 | : 2; |
42 | int freq = header.frequency(); |
43 | decoder.initOutputBuffer(channels, freq, destFileName); |
44 | } |
45 | decoder.decodeFrame(header, stream); |
46 | stream.closeFrame(); |
47 | } |
48 | } finally {
|
49 | decoder.close(); |
50 | } |
51 | } |
52 | |
53 | private short[] buffer; |
54 | private WaveFileWriter outWave; |
55 | int channels; |
56 | |
57 | public void initOutputBuffer(int numberOfChannels, int freq, String fileName) |
58 | throws IOException {
|
59 | super.initOutputBuffer(null, numberOfChannels); |
60 | channels = numberOfChannels; |
61 | buffer = new short[BUFFER_SIZE]; |
62 | for (int i = 0; i < numberOfChannels; ++i) {
|
63 | bufferPointer[i] = (short) i; |
64 | } |
65 | outWave = nuObject(WaveFileWriter.class, fileName, freq, (short) 16, (short) numberOfChannels); |
66 | } |
67 | |
68 | public void appendSamples(int channel, double[] f) {
|
69 | int p = bufferPointer[channel]; |
70 | for (int i = 0; i < 32; i++) {
|
71 | double sample = f[i]; |
72 | short s = ((sample > 32767.0f) ? 32767 |
73 | : ((sample < -32768.0f) ? -32768 : (short) sample)); |
74 | buffer[p] = s; |
75 | p += channels; |
76 | } |
77 | bufferPointer[channel] = p; |
78 | } |
79 | |
80 | public void writeBuffer() throws IOException {
|
81 | call(outWave, "writeData", buffer, bufferPointer[0]); |
82 | for (int i = 0; i < channels; ++i) {
|
83 | bufferPointer[i] = i; |
84 | } |
85 | } |
86 | |
87 | public void close() throws IOException {
|
88 | callOpt(outWave, "close"); |
89 | } |
90 | } |
91 | |
92 | new WavConverter().convert(in, f2s(out)); |
93 | } |
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| Snippet ID: | #1004794 |
| Snippet name: | mp3ToWAV - might work now |
| Eternal ID of this version: | #1004794/2 |
| Text MD5: | cf8d25a9fbb72a44e93fd7015f2e8925 |
| Author: | stefan |
| Category: | javax / sound |
| Type: | JavaX fragment (include) |
| Public (visible to everyone): | Yes |
| Archived (hidden from active list): | No |
| Created/modified: | 2019-09-22 16:04:43 |
| Source code size: | 3137 bytes / 93 lines |
| Pitched / IR pitched: | No / No |
| Views / Downloads: | 878 / 829 |
| Version history: | 1 change(s) |
| Referenced in: | [show references] |