// stream creation
//-------------------------------------------------
// stream_alloc - allocate a new stream
//-------------------------------------------------
public sound_stream stream_alloc(device_t device, int inputs, int outputs, int sample_rate, stream_update_delegate callback = null)
{
var stream = new sound_stream(device, inputs, outputs, sample_rate, callback);
m_stream_list.push_back(stream);
return(stream);
}
stream_update_delegate m_callback; // callback function
// construction/destruction
//-------------------------------------------------
// sound_stream - constructor
//-------------------------------------------------
public sound_stream(device_t device, int inputs, int outputs, int sample_rate, stream_update_delegate callback)
{
m_device = device;
m_next = null;
m_sample_rate = (UInt32)sample_rate;
m_new_sample_rate = 0xffffffff;
m_attoseconds_per_sample = 0;
m_max_samples_per_update = 0;
m_input = new std.vector <stream_input>(); //(inputs)
for (int i = 0; i < inputs; i++)
{
m_input.Add(new stream_input());
}
m_input_array = new ListPointer <stream_sample_t> [inputs];
m_resample_bufalloc = 0;
m_output = new std.vector <stream_output>(); //(outputs)
for (int i = 0; i < outputs; i++)
{
m_output.Add(new stream_output());
}
m_output_array = new ListPointer <stream_sample_t> [outputs];
m_output_bufalloc = 0;
m_output_sampindex = 0;
m_output_update_sampindex = 0;
m_output_base_sampindex = 0;
m_callback = callback;
// get the device's sound interface
device_sound_interface sound;
if (!device.interface_(out sound))
{
throw new emu_fatalerror("Attempted to create a sound_stream with a non-sound device");
}
if (m_callback == null)
{
m_callback = sound.sound_stream_update;
}
// create a unique tag for saving
string state_tag = string.Format("{0}", m_device.machine().sound().streams().size());
m_device.machine().save().save_item(device, "stream", state_tag, 0, m_sample_rate, "m_sample_rate");
m_device.machine().save().register_postload(postload);
// save the gain of each input and output
for (int inputnum = 0; inputnum < m_input.size(); inputnum++)
{
m_device.machine().save().save_item(device, "stream", state_tag, inputnum, m_input[inputnum].m_gain, "m_input[inputnum].m_gain");
m_device.machine().save().save_item(device, "stream", state_tag, inputnum, m_input[inputnum].m_user_gain, "m_input[inputnum].m_user_gain");
}
for (int outputnum = 0; outputnum < m_output.size(); outputnum++)
{
m_output[outputnum].m_stream = this;
m_device.machine().save().save_item(device, "stream", state_tag, outputnum, m_output[outputnum].m_gain, "m_output[outputnum].m_gain");
}
// Mark synchronous streams as such
m_synchronous = (int)m_sample_rate == sound_global.STREAM_SYNC;
if (m_synchronous)
{
m_sample_rate = 0;
m_sync_timer = m_device.machine().scheduler().timer_alloc(sync_update, this);
}
else
{
m_sync_timer = null;
}
// force an update to the sample rates; this will cause everything to be recomputed
// and will generate the initial resample buffers for our inputs
recompute_sample_rate_data();
// set up the initial output buffer positions now that we have data
m_output_base_sampindex = -m_max_samples_per_update;
}