static void TestAsound()
{
IntPtr pcm = IntPtr.Zero;
int ret = Asound.snd_pcm_open(out pcm, "default", Asound.snd_pcm_stream_t.SND_PCM_STREAM_PLAYBACK, 0);
if (ret < 0)
{
Console.WriteLine("Open error, {0}", Asound._snd_strerror(ret));
return;
}
else
{
Console.WriteLine("Open ok");
Asound.snd_pcm_close(pcm);
}
}
void PlayUsingASound(AudioFrame frame)
{
var type = frame.WaveDate;
int ret = 0;
if (pcm == IntPtr.Zero)
{
int dir;
int rate = type.bit_rate == 0 ? 44100 : type.bit_rate;
int channel = type.channel == 0 ? 2 : type.channel;
string device = "default";
ret = Asound.snd_pcm_open(out pcm, device,
Asound.snd_pcm_stream_t.SND_PCM_STREAM_PLAYBACK,
0);
if (ret < 0)
{
string err = Asound._snd_strerror(ret);
Console.WriteLine(err);
pcm = IntPtr.Zero;
return;
}
else
{
Console.WriteLine("open audio device ok, pcm is {0}", pcm);
}
IntPtr param = Asound.snd_pcm_hw_params_alloca();
ret = Asound.snd_pcm_hw_params_any(pcm, param);
ret = Asound.snd_pcm_hw_params_set_access(pcm, param, Asound.snd_pcm_access_t.SND_PCM_ACCESS_RW_INTERLEAVED);
ret = Asound.snd_pcm_hw_params_set_format(pcm, param, Asound.snd_pcm_format_t.SND_PCM_FORMAT_S16_LE);
ret = Asound.snd_pcm_hw_params_set_channels(pcm, param, channel);
int val = rate;
ret = Asound.snd_pcm_hw_params_set_rate_near(pcm, param, ref val, out dir);
ulong frames = (ulong)type.nb_samples;
ret = Asound.snd_pcm_hw_params_set_period_size_near(pcm, param, ref frames, out dir);
ret = Asound.snd_pcm_hw_params(pcm, param);
Asound.snd_pcm_params_free(param);
}
if (pcm == IntPtr.Zero)
{
return;
}
//long r = Asound.snd_pcm_writei(pcm, type, (ulong)type.nb_samples);
//Console.WriteLine("snd_pcm_writei {0}:{1}, return {2}", type.sample, type.nb_samples, r);
}
public void PutSample(WaveDataType type)
{
int ret;
int size = type.size;
int rate = type.sample_rate == 0 ? 44100 : type.sample_rate;
int bit = type.bit_per_sample == 0 ? 16 : type.bit_per_sample;
int channel = type.channel == 0 ? 2 : type.channel;
if (pcm == IntPtr.Zero)
{
int dir;
string device = "default";
ret = Asound.snd_pcm_open(out pcm, device,
Asound.snd_pcm_stream_t.SND_PCM_STREAM_PLAYBACK,
0);
if (ret < 0)
{
string err = Asound._snd_strerror(ret);
Console.WriteLine(err);
pcm = IntPtr.Zero;
return;
}
else
{
Console.WriteLine("open audio device ok, pcm is {0}", pcm);
}
IntPtr param = Asound.snd_pcm_hw_params_alloca();
ret = Asound.snd_pcm_hw_params_any(pcm, param);
ret = Asound.snd_pcm_hw_params_set_access(pcm, param, Asound.snd_pcm_access_t.SND_PCM_ACCESS_RW_INTERLEAVED);
ret = Asound.snd_pcm_hw_params_set_format(pcm, param, Asound.snd_pcm_format_t.SND_PCM_FORMAT_S16_LE);
ret = Asound.snd_pcm_hw_params_set_channels(pcm, param, channel);
int val = rate;
ret = Asound.snd_pcm_hw_params_set_rate_near(pcm, param, ref val, out dir);
ulong frames = (ulong)type.nb_samples;
ret = Asound.snd_pcm_hw_params_set_period_size_near(pcm, param, ref frames, out dir);
ret = Asound.snd_pcm_hw_params(pcm, param);
Asound.snd_pcm_params_free(param);
}
queue.Enqueue(type);
}