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1 #include <stdio.h>
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2 #include <assert.h>
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3 #include "ovstream.h"
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4
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5 OggVorbisStream::OggVorbisStream()
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6 {
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7 vfopen = false;
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8
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9 pthread_mutex_init(&vflock, 0);
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10 }
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11
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12 OggVorbisStream::~OggVorbisStream()
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13 {
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14 close();
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15 }
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16
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17 bool OggVorbisStream::open(const char *fname)
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18 {
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19 close();
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20
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21 pthread_mutex_lock(&vflock);
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22
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23 if(ov_fopen(fname, &vf) != 0) {
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24 fprintf(stderr, "failed to open ogg/vorbis stream: %s\n", fname ? fname : "<not found>");
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25 pthread_mutex_unlock(&vflock);
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26 return false;
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27 }
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28
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29 vfopen = true;
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30 pthread_mutex_unlock(&vflock);
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31 return true;
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32 }
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33
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34 void OggVorbisStream::close()
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35 {
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36 pthread_mutex_lock(&vflock);
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37 if(vfopen) {
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38 ov_clear(&vf);
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39 vfopen = false;
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40 }
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41 pthread_mutex_unlock(&vflock);
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42 }
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43
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44 void OggVorbisStream::play(AUDIO_PLAYMODE mode)
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45 {
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46 if (vfopen)
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47 {
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48 AudioStream::play(mode);
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49 } else {
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50 fprintf(stderr, "failed to play audio track.\n");
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51 }
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52 }
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53
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54 void OggVorbisStream::rewind()
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55 {
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56 pthread_mutex_lock(&vflock);
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57 if(vfopen) {
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58 ov_raw_seek(&vf, 0);
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59 }
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60 pthread_mutex_unlock(&vflock);
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61 }
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62
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63 bool OggVorbisStream::more_samples(AudioStreamBuffer *buf)
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64 {
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65 pthread_mutex_lock(&vflock);
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66
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67 vorbis_info *vinfo = ov_info(&vf, -1);
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68 buf->channels = vinfo->channels;
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69 buf->sample_rate = vinfo->rate;
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70 assert(buf->channels == 2);
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71 assert(buf->sample_rate == 44100);
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72
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73 long bufsz = AUDIO_BUFFER_BYTES;
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74 long total_read = 0;
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75 while(total_read < bufsz) {
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76 int bitstream;
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77 long rd = ov_read(&vf, buf->samples + total_read, bufsz - total_read, 0, 2, 1, &bitstream);
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78
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79 if(!rd) {
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80 bufsz = total_read;
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81 } else {
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82 total_read += rd;
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83 }
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84 }
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85
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86 if(!total_read) {
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87 buf->num_samples = 0;
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88 pthread_mutex_unlock(&vflock);
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89 return false;
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90 }
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91
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92 buf->num_samples = bufsz / vinfo->channels / 2;
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93 pthread_mutex_unlock(&vflock);
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94 return true;
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95 }
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