public void PushAudioFrame(float[] pcm, int channels = 1, int samplingRate = 48000)
{
long currentTimeMillis = (long)(DateTime.UtcNow - Jan1st1970).TotalMilliseconds;
// Convert 32bit float PCM to 16bit PCM data bytes.
var dataStream = new MemoryStream();
for (int i = 0; i < pcm.Length; i++)
{
dataStream.Write(BitConverter.GetBytes(Convert.ToInt16(pcm[i] * Int16.MaxValue)), 0, sizeof(Int16));
}
var buffer = dataStream.ToArray();
var audioFrame = new AudioFrame()
{
type = AUDIO_FRAME_TYPE.FRAME_TYPE_PCM16,
bytesPerSample = 2, // PCM16
buffer = buffer,
channels = channels,
samples = pcm.Length / channels,
samplesPerSec = samplingRate,
renderTimeMs = currentTimeMillis,
};
_RtcEngine.PushAudioFrame(audioFrame);
}
void PushAudioFrameThread()
{
var bytesPerSample = 2;
var type = AUDIO_FRAME_TYPE.FRAME_TYPE_PCM16;
var channels = CHANNEL;
var samples = SAMPLE_RATE / PUSH_FREQ_PER_SEC;
var samplesPerSec = SAMPLE_RATE;
var buffer = new byte[samples * bytesPerSample * CHANNEL];
var freq = 1000 / PUSH_FREQ_PER_SEC;
var tic = new TimeSpan(DateTime.Now.Ticks);
while (_pushAudioFrameThreadSignal)
{
if (!_startSignal)
{
tic = new TimeSpan(DateTime.Now.Ticks);
}
var toc = new TimeSpan(DateTime.Now.Ticks);
if (toc.Subtract(tic).Duration().Milliseconds >= freq)
{
tic = new TimeSpan(DateTime.Now.Ticks);
lock (audioBuffer)
{
if (audioBuffer.Size > samples * bytesPerSample * CHANNEL)
{
for (var j = 0; j < samples * bytesPerSample * CHANNEL; j++)
{
buffer[j] = audioBuffer.Get();
}
var audioFrame = new AudioFrame
{
bytesPerSample = bytesPerSample,
type = type,
samples = samples,
samplesPerSec = samplesPerSec,
channels = channels,
buffer = buffer,
renderTimeMs = DateTime.Now.Ticks
};
mRtcEngine.PushAudioFrame(audioFrame);
}
else
{
AppendRingBuffer();
}
}
}
}
}
private void onJoinChannelSuccess(string channelName, uint uid, int elapsed)
{
mRect = new Rect(0, 0, Screen.width, Screen.height);
mTexture = new Texture2D((int)mRect.width, (int)mRect.height, TextureFormat.RGBA32, false);
cutScreen();
// ExternalVideoFrame externalVideoFrame = new ExternalVideoFrame();
// externalVideoFrame.type = ExternalVideoFrame.VIDEO_BUFFER_TYPE.VIDEO_BUFFER_RAW_DATA;
// externalVideoFrame.format = ExternalVideoFrame.VIDEO_PIXEL_FORMAT.VIDEO_PIXEL_I420;
// externalVideoFrame.buffer = new byte[1024];
// mRtcEngine.PushVideoFrame(externalVideoFrame);
logCallback("JoinChannelSuccessHandler: uid = " + uid);
AudioFrame audioFrame = new AudioFrame();
mRtcEngine.PushAudioFrame(audioFrame);
}
