13
0
livetrax/libs/backends/portaudio/portaudio_io.cc

498 lines
12 KiB
C++
Raw Normal View History

/*
* Copyright (C) 2015 Robin Gareus <robin@gareus.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <assert.h>
#include "portaudio_io.h"
#define INTERLEAVED_INPUT
#define INTERLEAVED_OUTPUT
using namespace ARDOUR;
PortAudioIO::PortAudioIO ()
: _state (-1)
, _initialized (false)
, _capture_channels (0)
, _playback_channels (0)
, _stream (0)
, _input_buffer (0)
, _output_buffer (0)
, _cur_sample_rate (0)
, _cur_input_latency (0)
, _cur_output_latency (0)
{
}
PortAudioIO::~PortAudioIO ()
{
if (_state == 0) {
pcm_stop();
}
if (_initialized) {
Pa_Terminate();
}
for (std::map<int, paDevice*>::const_iterator i = _devices.begin (); i != _devices.end(); ++i) {
delete i->second;
}
_devices.clear();
free (_input_buffer); _input_buffer = NULL;
free (_output_buffer); _output_buffer = NULL;
}
int
PortAudioIO::available_sample_rates(int device_id, std::vector<float>& sampleRates)
{
static const float ardourRates[] = { 8000.0, 22050.0, 24000.0, 44100.0, 48000.0, 88200.0, 96000.0, 176400.0, 192000.0};
assert(_initialized);
// TODO use separate int device_input, int device_output ?!
if (device_id == -1) {
device_id = Pa_GetDefaultInputDevice();
}
#ifndef NDEBUG
printf("PortAudio: Querying Samplerates for device %d\n", device_id);
#endif
sampleRates.clear();
const PaDeviceInfo* nfo = Pa_GetDeviceInfo(device_id);
if (nfo) {
PaStreamParameters inputParam;
PaStreamParameters outputParam;
inputParam.device = device_id;
inputParam.channelCount = nfo->maxInputChannels;
inputParam.sampleFormat = paFloat32;
inputParam.suggestedLatency = 0;
inputParam.hostApiSpecificStreamInfo = 0;
outputParam.device = device_id;
outputParam.channelCount = nfo->maxOutputChannels;
outputParam.sampleFormat = paFloat32;
outputParam.suggestedLatency = 0;
outputParam.hostApiSpecificStreamInfo = 0;
for (uint32_t i = 0; i < sizeof(ardourRates)/sizeof(float); ++i) {
if (paFormatIsSupported == Pa_IsFormatSupported(
nfo->maxInputChannels > 0 ? &inputParam : NULL,
nfo->maxOutputChannels > 0 ? &outputParam : NULL,
ardourRates[i])) {
sampleRates.push_back (ardourRates[i]);
}
}
}
if (sampleRates.empty()) {
// fill in something..
sampleRates.push_back (44100.0);
sampleRates.push_back (48000.0);
}
return 0;
}
int
PortAudioIO::available_buffer_sizes(int device_id, std::vector<uint32_t>& bufferSizes)
{
// TODO
static const uint32_t ardourSizes[] = { 64, 128, 256, 512, 1024, 2048, 4096 };
for(uint32_t i = 0; i < sizeof(ardourSizes)/sizeof(uint32_t); ++i) {
bufferSizes.push_back (ardourSizes[i]);
}
return 0;
}
void
PortAudioIO::device_list (std::map<int, std::string> &devices) const {
devices.clear();
for (std::map<int, paDevice*>::const_iterator i = _devices.begin (); i != _devices.end(); ++i) {
devices.insert (std::pair<int, std::string> (i->first, i->second->name));
}
}
void
PortAudioIO::discover()
{
for (std::map<int, paDevice*>::const_iterator i = _devices.begin (); i != _devices.end(); ++i) {
delete i->second;
}
_devices.clear();
PaError err = paNoError;
if (!_initialized) {
err = Pa_Initialize();
}
if (err != paNoError) {
return;
}
_initialized = true;
{
const PaDeviceInfo* nfo_i = Pa_GetDeviceInfo(Pa_GetDefaultInputDevice());
const PaDeviceInfo* nfo_o = Pa_GetDeviceInfo(Pa_GetDefaultOutputDevice());
if (nfo_i && nfo_o) {
_devices.insert (std::pair<int, paDevice*> (-1,
new paDevice("Default",
nfo_i->maxInputChannels,
nfo_o->maxOutputChannels
)));
}
}
int n_devices = Pa_GetDeviceCount();
#ifndef NDEBUG
printf("PortAudio %d devices found:\n", n_devices);
#endif
for (int i = 0 ; i < n_devices; ++i) {
const PaDeviceInfo* nfo = Pa_GetDeviceInfo(i);
if (!nfo) continue;
#ifndef NDEBUG
printf(" (%d) '%s' in: %d (lat: %.1f .. %.1f) out: %d (lat: %.1f .. %.1f) sr:%.2f\n",
i, nfo->name,
nfo->maxInputChannels,
nfo->defaultLowInputLatency * 1e3,
nfo->defaultHighInputLatency * 1e3,
nfo->maxOutputChannels,
nfo->defaultLowOutputLatency * 1e3,
nfo->defaultHighOutputLatency * 1e3,
nfo->defaultSampleRate);
#endif
if ( nfo->maxInputChannels == 0 && nfo->maxOutputChannels == 0) {
continue;
}
_devices.insert (std::pair<int, paDevice*> (i, new paDevice(
nfo->name,
nfo->maxInputChannels,
nfo->maxOutputChannels
)));
}
}
void
PortAudioIO::pcm_stop ()
{
if (_stream) {
Pa_CloseStream (_stream);
}
_stream = NULL;
_capture_channels = 0;
_playback_channels = 0;
_cur_sample_rate = 0;
_cur_input_latency = 0;
_cur_output_latency = 0;
free (_input_buffer); _input_buffer = NULL;
free (_output_buffer); _output_buffer = NULL;
_state = -1;
}
int
PortAudioIO::pcm_start()
{
PaError err = Pa_StartStream (_stream);
if (err != paNoError) {
_state = -1;
return -1;
}
return 0;
}
#ifdef __APPLE__
static uint32_t lower_power_of_two (uint32_t v) {
v--;
v |= v >> 1;
v |= v >> 2;
v |= v >> 4;
v |= v >> 8;
v |= v >> 16;
v++;
return v >> 1;
}
#endif
int
PortAudioIO::pcm_setup (
int device_input, int device_output,
double sample_rate, uint32_t samples_per_period)
{
_state = -2;
// TODO error reporting sans fprintf()
PaError err = paNoError;
const PaDeviceInfo *nfo_in;
const PaDeviceInfo *nfo_out;
const PaStreamInfo *nfo_s;
if (!_initialized) {
err = Pa_Initialize();
}
if (err != paNoError) {
fprintf(stderr, "PortAudio Initialization Failed\n");
goto error;
}
_initialized = true;
if (device_input == -1) {
device_input = Pa_GetDefaultInputDevice();
}
if (device_output == -1) {
device_output = Pa_GetDefaultOutputDevice();
}
_capture_channels = 0;
_playback_channels = 0;
_cur_sample_rate = 0;
_cur_input_latency = 0;
_cur_output_latency = 0;
#ifndef NDEBUG
printf("PortAudio Device IDs: i:%d o:%d\n", device_input, device_output);
#endif
nfo_in = Pa_GetDeviceInfo(device_input);
nfo_out = Pa_GetDeviceInfo(device_output);
if (!nfo_in && ! nfo_out) {
fprintf(stderr, "PortAudio Cannot Query Device Info\n");
goto error;
}
if (nfo_in) {
_capture_channels = nfo_in->maxInputChannels;
}
if (nfo_out) {
_playback_channels = nfo_out->maxOutputChannels;
}
if(_capture_channels == 0 && _playback_channels == 0) {
fprintf(stderr, "PortAudio no Input and no output channels.\n");
goto error;
}
#ifdef __APPLE__
// pa_mac_core_blocking.c pa_stable_v19_20140130
// BUG: ringbuffer alloc requires power-of-two chn count.
if ((_capture_channels & (_capture_channels - 1)) != 0) {
printf("Adjusted capture channes to power of two (portaudio rb bug)\n");
_capture_channels = lower_power_of_two (_capture_channels);
}
if ((_playback_channels & (_playback_channels - 1)) != 0) {
printf("Adjusted capture channes to power of two (portaudio rb bug)\n");
_playback_channels = lower_power_of_two (_playback_channels);
}
#endif
#ifndef NDEBUG
printf("PortAudio Channels: in:%d out:%d\n",
_capture_channels, _playback_channels);
#endif
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 (
&_stream,
_capture_channels > 0 ? &inputParam: NULL,
_playback_channels > 0 ? &outputParam: NULL,
sample_rate,
samples_per_period,
paClipOff | paDitherOff,
NULL, NULL);
if (err != paNoError) {
fprintf(stderr, "PortAudio failed to start stream.\n");
goto error;
}
nfo_s = Pa_GetStreamInfo (_stream);
if (!nfo_s) {
fprintf(stderr, "PortAudio failed to query stream information.\n");
pcm_stop();
goto error;
}
_cur_sample_rate = nfo_s->sampleRate;
_cur_input_latency = nfo_s->inputLatency * _cur_sample_rate;
_cur_output_latency = nfo_s->outputLatency * _cur_sample_rate;
#ifndef NDEBUG
printf("PA Sample Rate %.1f SPS\n", _cur_sample_rate);
printf("PA Input Latency %.1fms %d spl\n", 1e3 * nfo_s->inputLatency, _cur_input_latency);
printf("PA Output Latency %.1fms %d spl\n", 1e3 * nfo_s->outputLatency, _cur_output_latency);
#endif
_state = 0;
if (_capture_channels > 0) {
_input_buffer = (float*) malloc (samples_per_period * _capture_channels * sizeof(float));
if (!_input_buffer) {
fprintf(stderr, "PortAudio failed to allocate input buffer.\n");
pcm_stop();
goto error;
}
}
if (_playback_channels > 0) {
_output_buffer = (float*) calloc (samples_per_period * _playback_channels, sizeof(float));
if (!_output_buffer) {
fprintf(stderr, "PortAudio failed to allocate output buffer.\n");
pcm_stop();
goto error;
}
}
return 0;
error:
_capture_channels = 0;
_playback_channels = 0;
free (_input_buffer); _input_buffer = NULL;
free (_output_buffer); _output_buffer = NULL;
Pa_Terminate();
return -1;
}
int
PortAudioIO::next_cycle (uint32_t n_samples)
{
bool xrun = false;
PaError err;
err = Pa_IsStreamActive (_stream);
if (err != 1) {
// 0: inactive / aborted
// < 0: error
return -1;
}
// TODO, check drift.. process part with larger capacity first.
// Pa_GetStreamReadAvailable(_stream) < Pa_GetStreamWriteAvailable(_stream)
if (_playback_channels > 0) {
err = Pa_WriteStream (_stream, _output_buffer, n_samples);
if (err) xrun = true;
}
if (_capture_channels > 0) {
err = Pa_ReadStream (_stream, _input_buffer, n_samples);
if (err) {
memset (_input_buffer, 0, sizeof(float) * n_samples * _capture_channels);
xrun = true;
}
}
return xrun ? 1 : 0;
}
#ifdef INTERLEAVED_INPUT
int
PortAudioIO::get_capture_channel (uint32_t chn, float *input, uint32_t n_samples)
{
assert(chn < _capture_channels);
const uint32_t stride = _capture_channels;
float *ptr = _input_buffer + chn;
while (n_samples-- > 0) {
*input++ = *ptr;
ptr += stride;
}
return 0;
}
#else
int
PortAudioIO::get_capture_channel (uint32_t chn, float *input, uint32_t n_samples)
{
assert(chn < _capture_channels);
memcpy((void*)input, &(_input_buffer[chn * n_samples]), n_samples * sizeof(float));
2015-03-20 11:16:55 -04:00
return 0;
}
#endif
#ifdef INTERLEAVED_OUTPUT
int
PortAudioIO::set_playback_channel (uint32_t chn, const float *output, uint32_t n_samples)
{
assert(chn < _playback_channels);
const uint32_t stride = _playback_channels;
float *ptr = _output_buffer + chn;
while (n_samples-- > 0) {
*ptr = *output++;
ptr += stride;
}
return 0;
}
#else
int
PortAudioIO::set_playback_channel (uint32_t chn, const float *output, uint32_t n_samples)
{
assert(chn < _playback_channels);
memcpy((void*)&(_output_buffer[chn * n_samples]), (void*)output, n_samples * sizeof(float));
return 0;
}
#endif