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Refactor part of PortAudioIO::pcm_setup into 2 new methods

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This commit is contained in:
Tim Mayberry 2015-08-23 18:38:01 +10:00
parent 41211c984c
commit c857008b93
2 changed files with 83 additions and 54 deletions
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130
libs/backends/portaudio/portaudio_io.cc
View file

@ -607,6 +607,74 @@ PortAudioIO::allocate_buffers_for_blocking_api (uint32_t samples_per_period)
return true;
}
bool
PortAudioIO::get_input_stream_params(int device_input,
PaStreamParameters& inputParam) const
{
const PaDeviceInfo *nfo_in = NULL;
if (device_input == DeviceDefault) {
device_input = get_default_input_device ();
}
if (device_input == DeviceNone) {
return false;
}
nfo_in = Pa_GetDeviceInfo(device_input);
if (nfo_in == NULL) {
DEBUG_AUDIO ("PortAudio Cannot Query Input Device Info\n");
return false;
}
inputParam.device = device_input;
inputParam.channelCount = nfo_in->maxInputChannels;
#ifdef INTERLEAVED_INPUT
inputParam.sampleFormat = paFloat32;
#else
inputParam.sampleFormat = paFloat32 | paNonInterleaved;
#endif
inputParam.suggestedLatency = nfo_in->defaultLowInputLatency;
inputParam.hostApiSpecificStreamInfo = NULL;
return true;
}
bool
PortAudioIO::get_output_stream_params(int device_output,
PaStreamParameters& outputParam) const
{
const PaDeviceInfo *nfo_out = NULL;
if (device_output == DeviceDefault) {
device_output = get_default_output_device ();
}
if (device_output == DeviceNone) {
return false;
}
nfo_out = Pa_GetDeviceInfo(device_output);
if (nfo_out == NULL) {
DEBUG_AUDIO ("PortAudio Cannot Query Output Device Info\n");
return false;
}
outputParam.device = device_output;
outputParam.channelCount = nfo_out->maxOutputChannels;
#ifdef INTERLEAVED_OUTPUT
outputParam.sampleFormat = paFloat32;
#else
outputParam.sampleFormat = paFloat32 | paNonInterleaved;
#endif
outputParam.suggestedLatency = nfo_out->defaultLowOutputLatency;
outputParam.hostApiSpecificStreamInfo = NULL;
return true;
}
int
PortAudioIO::pcm_setup (
int device_input, int device_output,
@ -615,21 +683,12 @@ PortAudioIO::pcm_setup (
_state = -2;
PaError err = paNoError;
const PaDeviceInfo *nfo_in = NULL;
const PaDeviceInfo *nfo_out = NULL;
if (!initialize_pa()) {
DEBUG_AUDIO ("PortAudio Initialization Failed\n");
return -1;
}
if (device_input == DeviceDefault) {
device_input = get_default_input_device ();
}
if (device_output == DeviceDefault) {
device_output = get_default_output_device ();
}
_capture_channels = 0;
_playback_channels = 0;
_cur_sample_rate = 0;
@ -646,28 +705,19 @@ PortAudioIO::pcm_setup (
return -1;
}
if (device_input != DeviceNone) {
nfo_in = Pa_GetDeviceInfo(device_input);
PaStreamParameters inputParam;
PaStreamParameters outputParam;
if (get_input_stream_params(device_input, inputParam)) {
_capture_channels = inputParam.channelCount;
}
if (device_output != DeviceNone) {
nfo_out = Pa_GetDeviceInfo(device_output);
if (get_output_stream_params(device_output, outputParam)) {
_playback_channels = outputParam.channelCount;
}
if (!nfo_in && !nfo_out) {
DEBUG_AUDIO ("PortAudio Cannot Query Device Info\n");
return -1;
}
if (nfo_in) {
_capture_channels = nfo_in->maxInputChannels;
}
if (nfo_out) {
_playback_channels = nfo_out->maxOutputChannels;
}
if(_capture_channels == 0 && _playback_channels == 0) {
DEBUG_AUDIO ("PortAudio no input or output channels.\n");
if (_capture_channels == 0 && _playback_channels == 0) {
DEBUG_AUDIO("PortAudio no input or output channels.\n");
return -1;
}
@ -675,32 +725,6 @@ PortAudioIO::pcm_setup (
_capture_channels,
_playback_channels));
PaStreamParameters inputParam;
PaStreamParameters outputParam;
if (nfo_in) {
inputParam.device = device_input;
inputParam.channelCount = _capture_channels;
#ifdef INTERLEAVED_INPUT
inputParam.sampleFormat = paFloat32;
#else
inputParam.sampleFormat = paFloat32 | paNonInterleaved;
#endif
inputParam.suggestedLatency = nfo_in->defaultLowInputLatency;
inputParam.hostApiSpecificStreamInfo = NULL;
}
if (nfo_out) {
outputParam.device = device_output;
outputParam.channelCount = _playback_channels;
#ifdef INTERLEAVED_OUTPUT
outputParam.sampleFormat = paFloat32;
#else
outputParam.sampleFormat = paFloat32 | paNonInterleaved;
#endif
outputParam.suggestedLatency = nfo_out->defaultLowOutputLatency;
outputParam.hostApiSpecificStreamInfo = NULL;
}
// XXX re-consider using callback API, testing needed.
err = Pa_OpenStream (

7
libs/backends/portaudio/portaudio_io.h
View file

@ -106,7 +106,12 @@ private: // Methods
void add_devices ();
std::string get_host_api_name_from_index (PaHostApiIndex index);
bool set_sample_rate_and_latency_from_stream ();
bool get_output_stream_params(int device_output,
PaStreamParameters& outputParam) const;
bool get_input_stream_params(int device_input,
PaStreamParameters& inputParam) const;
bool set_sample_rate_and_latency_from_stream();
bool allocate_buffers_for_blocking_api (uint32_t samples_per_period);
static void get_default_sample_rates(std::vector<float>&);