SINT SoundSourceOpus::readSampleFramesStereo(
SINT numberOfFrames, CSAMPLE* sampleBuffer,
SINT sampleBufferSize) {
DEBUG_ASSERT(isValidFrameIndex(m_curFrameIndex));
DEBUG_ASSERT(getSampleBufferSize(numberOfFrames, true) <= sampleBufferSize);
const SINT numberOfFramesTotal = math_min(
numberOfFrames, getMaxFrameIndex() - m_curFrameIndex);
CSAMPLE* pSampleBuffer = sampleBuffer;
SINT numberOfFramesRemaining = numberOfFramesTotal;
while (0 < numberOfFramesRemaining) {
int readResult = op_read_float_stereo(m_pOggOpusFile,
pSampleBuffer,
numberOfFramesRemaining * 2); // stereo
if (0 < readResult) {
m_curFrameIndex += readResult;
pSampleBuffer += readResult * 2; // stereo
numberOfFramesRemaining -= readResult;
} else {
qWarning() << "Failed to read sample data from OggOpus file:"
<< readResult;
break; // abort
}
}
DEBUG_ASSERT(isValidFrameIndex(m_curFrameIndex));
DEBUG_ASSERT(numberOfFramesTotal >= numberOfFramesRemaining);
return numberOfFramesTotal - numberOfFramesRemaining;
}
void cmdMusic(const std::string& args) {
// terrible hack for testing audio
// decode the entire file into a big buffer all at once
OggOpusFile* opusFile;
if (args.length() == 0) {
opusFile = op_open_memory(
static_cast<const uint8_t*>(EMBED_DATA(Who_Likes_to_Party_Kevin_MacLeod_incompetech_opus)),
EMBED_SIZE(Who_Likes_to_Party_Kevin_MacLeod_incompetech_opus),
NULL);
} else {
opusFile = op_open_file(args.c_str(), NULL);
}
if (!opusFile) {
narf::console->println("Failed to open music file " + args);
return;
}
auto newMusicSize = op_pcm_total(opusFile, -1) * 2; // stereo
auto newMusicSamples = new float[newMusicSize];
size_t decoded = 0;
while (decoded < newMusicSize) {
auto rc = op_read_float_stereo(opusFile, newMusicSamples + decoded, newMusicSize - decoded);
if (rc < 0) {
narf::console->println("opusfile decode failed");
decoded = 0;
break;
}
decoded += rc * 2; // return code is number of samples per channel, and we are decoding in stereo
}
if (decoded != newMusicSize) {
narf::console->println("opusfile decode returned wrong number of samples (got " + std::to_string(decoded) + ", expected " + std::to_string(newMusicSize) + ")");
delete[] newMusicSamples;
newMusicSamples = nullptr;
newMusicSize = 0;
}
SDL_LockMutex(musicMutex);
if (musicSamples) {
delete[] musicSamples;
}
musicSamples = newMusicSamples;
musicSize = newMusicSize;
musicCursor = 0;
SDL_UnlockMutex(musicMutex);
op_free(opusFile);
}