| 41 | } |
| 42 | |
| 43 | bool AudioDecoderOgg::decodeToPcm() { |
| 44 | _fileData = FileUtils::getInstance()->getDataFromFile(_url); |
| 45 | if (_fileData.isNull()) { |
| 46 | return false; |
| 47 | } |
| 48 | |
| 49 | ov_callbacks callbacks; |
| 50 | callbacks.read_func = AudioDecoder::fileRead; |
| 51 | callbacks.seek_func = AudioDecoderOgg::fseek64Wrap; |
| 52 | callbacks.close_func = AudioDecoder::fileClose; |
| 53 | callbacks.tell_func = AudioDecoder::fileTell; |
| 54 | |
| 55 | _fileCurrPos = 0; |
| 56 | |
| 57 | OggVorbis_File vf; |
| 58 | int ret = ov_open_callbacks(this, &vf, NULL, 0, callbacks); |
| 59 | if (ret != 0) { |
| 60 | ALOGE("Open file error, file: %s, ov_open_callbacks return %d", _url.c_str(), ret); |
| 61 | return false; |
| 62 | } |
| 63 | // header |
| 64 | auto vi = ov_info(&vf, -1); |
| 65 | |
| 66 | uint32_t pcmSamples = (uint32_t)ov_pcm_total(&vf, -1); |
| 67 | |
| 68 | uint32_t bufferSize = pcmSamples * vi->channels * sizeof(short); |
| 69 | char *pcmBuffer = (char *)malloc(bufferSize); |
| 70 | memset(pcmBuffer, 0, bufferSize); |
| 71 | |
| 72 | int currentSection = 0; |
| 73 | long curPos = 0; |
| 74 | long readBytes = 0; |
| 75 | |
| 76 | do { |
| 77 | readBytes = ov_read(&vf, pcmBuffer + curPos, 4096, ¤tSection); |
| 78 | curPos += readBytes; |
| 79 | } while (readBytes > 0); |
| 80 | |
| 81 | if (curPos > 0) { |
| 82 | _result.pcmBuffer->insert(_result.pcmBuffer->end(), pcmBuffer, pcmBuffer + bufferSize); |
| 83 | _result.numChannels = vi->channels; |
| 84 | _result.sampleRate = vi->rate; |
| 85 | _result.bitsPerSample = SL_PCMSAMPLEFORMAT_FIXED_16; |
| 86 | _result.containerSize = SL_PCMSAMPLEFORMAT_FIXED_16; |
| 87 | _result.channelMask = vi->channels == 1 ? SL_SPEAKER_FRONT_CENTER : (SL_SPEAKER_FRONT_LEFT | SL_SPEAKER_FRONT_RIGHT); |
| 88 | _result.endianness = SL_BYTEORDER_LITTLEENDIAN; |
| 89 | _result.numFrames = pcmSamples; |
| 90 | _result.duration = 1.0f * pcmSamples / vi->rate; |
| 91 | } else { |
| 92 | ALOGE("ov_read returns 0 byte!"); |
| 93 | } |
| 94 | |
| 95 | ov_clear(&vf); |
| 96 | free(pcmBuffer); |
| 97 | |
| 98 | return (curPos > 0); |
| 99 | } |
| 100 | |