6d4380a48c
This will also allow backends to better synchronize the tracked clock time with the device output latency, without necessarily needing to lock if the backend API can allow for it.
574 lines
18 KiB
C
574 lines
18 KiB
C
/**
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* OpenAL cross platform audio library
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* Copyright (C) 1999-2007 by authors.
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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* Or go to http://www.gnu.org/copyleft/lgpl.html
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*/
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#include "config.h"
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "alMain.h"
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#include "alu.h"
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#include "compat.h"
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#include "backends/base.h"
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#include <portaudio.h>
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static const ALCchar pa_device[] = "PortAudio Default";
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#ifdef HAVE_DYNLOAD
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static void *pa_handle;
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#define MAKE_FUNC(x) static __typeof(x) * p##x
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MAKE_FUNC(Pa_Initialize);
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MAKE_FUNC(Pa_Terminate);
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MAKE_FUNC(Pa_GetErrorText);
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MAKE_FUNC(Pa_StartStream);
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MAKE_FUNC(Pa_StopStream);
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MAKE_FUNC(Pa_OpenStream);
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MAKE_FUNC(Pa_CloseStream);
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MAKE_FUNC(Pa_GetDefaultOutputDevice);
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MAKE_FUNC(Pa_GetDefaultInputDevice);
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MAKE_FUNC(Pa_GetStreamInfo);
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#undef MAKE_FUNC
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#define Pa_Initialize pPa_Initialize
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#define Pa_Terminate pPa_Terminate
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#define Pa_GetErrorText pPa_GetErrorText
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#define Pa_StartStream pPa_StartStream
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#define Pa_StopStream pPa_StopStream
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#define Pa_OpenStream pPa_OpenStream
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#define Pa_CloseStream pPa_CloseStream
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#define Pa_GetDefaultOutputDevice pPa_GetDefaultOutputDevice
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#define Pa_GetDefaultInputDevice pPa_GetDefaultInputDevice
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#define Pa_GetStreamInfo pPa_GetStreamInfo
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#endif
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static ALCboolean pa_load(void)
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{
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PaError err;
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#ifdef HAVE_DYNLOAD
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if(!pa_handle)
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{
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#ifdef _WIN32
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# define PALIB "portaudio.dll"
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#elif defined(__APPLE__) && defined(__MACH__)
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# define PALIB "libportaudio.2.dylib"
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#elif defined(__OpenBSD__)
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# define PALIB "libportaudio.so"
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#else
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# define PALIB "libportaudio.so.2"
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#endif
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pa_handle = LoadLib(PALIB);
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if(!pa_handle)
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return ALC_FALSE;
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#define LOAD_FUNC(f) do { \
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p##f = GetSymbol(pa_handle, #f); \
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if(p##f == NULL) \
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{ \
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CloseLib(pa_handle); \
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pa_handle = NULL; \
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return ALC_FALSE; \
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} \
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} while(0)
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LOAD_FUNC(Pa_Initialize);
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LOAD_FUNC(Pa_Terminate);
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LOAD_FUNC(Pa_GetErrorText);
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LOAD_FUNC(Pa_StartStream);
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LOAD_FUNC(Pa_StopStream);
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LOAD_FUNC(Pa_OpenStream);
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LOAD_FUNC(Pa_CloseStream);
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LOAD_FUNC(Pa_GetDefaultOutputDevice);
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LOAD_FUNC(Pa_GetDefaultInputDevice);
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LOAD_FUNC(Pa_GetStreamInfo);
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#undef LOAD_FUNC
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if((err=Pa_Initialize()) != paNoError)
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{
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ERR("Pa_Initialize() returned an error: %s\n", Pa_GetErrorText(err));
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CloseLib(pa_handle);
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pa_handle = NULL;
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return ALC_FALSE;
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}
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}
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#else
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if((err=Pa_Initialize()) != paNoError)
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{
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ERR("Pa_Initialize() returned an error: %s\n", Pa_GetErrorText(err));
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return ALC_FALSE;
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}
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#endif
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return ALC_TRUE;
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}
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typedef struct ALCportPlayback {
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DERIVE_FROM_TYPE(ALCbackend);
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PaStream *stream;
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PaStreamParameters params;
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ALuint update_size;
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} ALCportPlayback;
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static int ALCportPlayback_WriteCallback(const void *inputBuffer, void *outputBuffer,
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unsigned long framesPerBuffer, const PaStreamCallbackTimeInfo *timeInfo,
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const PaStreamCallbackFlags statusFlags, void *userData);
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static void ALCportPlayback_Construct(ALCportPlayback *self, ALCdevice *device);
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static void ALCportPlayback_Destruct(ALCportPlayback *self);
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static ALCenum ALCportPlayback_open(ALCportPlayback *self, const ALCchar *name);
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static void ALCportPlayback_close(ALCportPlayback *self);
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static ALCboolean ALCportPlayback_reset(ALCportPlayback *self);
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static ALCboolean ALCportPlayback_start(ALCportPlayback *self);
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static void ALCportPlayback_stop(ALCportPlayback *self);
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static DECLARE_FORWARD2(ALCportPlayback, ALCbackend, ALCenum, captureSamples, ALCvoid*, ALCuint)
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static DECLARE_FORWARD(ALCportPlayback, ALCbackend, ALCuint, availableSamples)
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static DECLARE_FORWARD(ALCportPlayback, ALCbackend, ClockLatency, getClockLatency)
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static DECLARE_FORWARD(ALCportPlayback, ALCbackend, void, lock)
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static DECLARE_FORWARD(ALCportPlayback, ALCbackend, void, unlock)
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DECLARE_DEFAULT_ALLOCATORS(ALCportPlayback)
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DEFINE_ALCBACKEND_VTABLE(ALCportPlayback);
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static void ALCportPlayback_Construct(ALCportPlayback *self, ALCdevice *device)
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{
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ALCbackend_Construct(STATIC_CAST(ALCbackend, self), device);
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SET_VTABLE2(ALCportPlayback, ALCbackend, self);
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self->stream = NULL;
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}
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static void ALCportPlayback_Destruct(ALCportPlayback *self)
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{
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if(self->stream)
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Pa_CloseStream(self->stream);
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self->stream = NULL;
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ALCbackend_Destruct(STATIC_CAST(ALCbackend, self));
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}
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static int ALCportPlayback_WriteCallback(const void *UNUSED(inputBuffer), void *outputBuffer,
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unsigned long framesPerBuffer, const PaStreamCallbackTimeInfo *UNUSED(timeInfo),
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const PaStreamCallbackFlags UNUSED(statusFlags), void *userData)
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{
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ALCportPlayback *self = userData;
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aluMixData(STATIC_CAST(ALCbackend, self)->mDevice, outputBuffer, framesPerBuffer);
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return 0;
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}
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static ALCenum ALCportPlayback_open(ALCportPlayback *self, const ALCchar *name)
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{
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ALCdevice *device = STATIC_CAST(ALCbackend, self)->mDevice;
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PaError err;
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if(!name)
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name = pa_device;
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else if(strcmp(name, pa_device) != 0)
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return ALC_INVALID_VALUE;
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self->update_size = device->UpdateSize;
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self->params.device = -1;
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if(!ConfigValueInt(NULL, "port", "device", &self->params.device) ||
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self->params.device < 0)
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self->params.device = Pa_GetDefaultOutputDevice();
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self->params.suggestedLatency = (device->UpdateSize*device->NumUpdates) /
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(float)device->Frequency;
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self->params.hostApiSpecificStreamInfo = NULL;
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self->params.channelCount = ((device->FmtChans == DevFmtMono) ? 1 : 2);
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switch(device->FmtType)
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{
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case DevFmtByte:
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self->params.sampleFormat = paInt8;
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break;
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case DevFmtUByte:
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self->params.sampleFormat = paUInt8;
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break;
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case DevFmtUShort:
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/* fall-through */
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case DevFmtShort:
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self->params.sampleFormat = paInt16;
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break;
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case DevFmtUInt:
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/* fall-through */
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case DevFmtInt:
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self->params.sampleFormat = paInt32;
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break;
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case DevFmtFloat:
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self->params.sampleFormat = paFloat32;
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break;
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}
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retry_open:
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err = Pa_OpenStream(&self->stream, NULL, &self->params,
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device->Frequency, device->UpdateSize, paNoFlag,
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ALCportPlayback_WriteCallback, self
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);
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if(err != paNoError)
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{
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if(self->params.sampleFormat == paFloat32)
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{
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self->params.sampleFormat = paInt16;
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goto retry_open;
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}
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ERR("Pa_OpenStream() returned an error: %s\n", Pa_GetErrorText(err));
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return ALC_INVALID_VALUE;
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}
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al_string_copy_cstr(&device->DeviceName, name);
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return ALC_NO_ERROR;
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}
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static void ALCportPlayback_close(ALCportPlayback *self)
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{
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PaError err = Pa_CloseStream(self->stream);
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if(err != paNoError)
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ERR("Error closing stream: %s\n", Pa_GetErrorText(err));
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self->stream = NULL;
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}
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static ALCboolean ALCportPlayback_reset(ALCportPlayback *self)
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{
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ALCdevice *device = STATIC_CAST(ALCbackend, self)->mDevice;
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const PaStreamInfo *streamInfo;
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streamInfo = Pa_GetStreamInfo(self->stream);
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device->Frequency = streamInfo->sampleRate;
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device->UpdateSize = self->update_size;
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if(self->params.sampleFormat == paInt8)
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device->FmtType = DevFmtByte;
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else if(self->params.sampleFormat == paUInt8)
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device->FmtType = DevFmtUByte;
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else if(self->params.sampleFormat == paInt16)
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device->FmtType = DevFmtShort;
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else if(self->params.sampleFormat == paInt32)
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device->FmtType = DevFmtInt;
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else if(self->params.sampleFormat == paFloat32)
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device->FmtType = DevFmtFloat;
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else
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{
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ERR("Unexpected sample format: 0x%lx\n", self->params.sampleFormat);
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return ALC_FALSE;
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}
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if(self->params.channelCount == 2)
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device->FmtChans = DevFmtStereo;
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else if(self->params.channelCount == 1)
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device->FmtChans = DevFmtMono;
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else
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{
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ERR("Unexpected channel count: %u\n", self->params.channelCount);
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return ALC_FALSE;
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}
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SetDefaultChannelOrder(device);
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return ALC_TRUE;
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}
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static ALCboolean ALCportPlayback_start(ALCportPlayback *self)
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{
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PaError err;
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err = Pa_StartStream(self->stream);
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if(err != paNoError)
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{
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ERR("Pa_StartStream() returned an error: %s\n", Pa_GetErrorText(err));
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return ALC_FALSE;
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}
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return ALC_TRUE;
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}
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static void ALCportPlayback_stop(ALCportPlayback *self)
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{
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PaError err = Pa_StopStream(self->stream);
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if(err != paNoError)
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ERR("Error stopping stream: %s\n", Pa_GetErrorText(err));
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}
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typedef struct ALCportCapture {
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DERIVE_FROM_TYPE(ALCbackend);
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PaStream *stream;
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PaStreamParameters params;
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ll_ringbuffer_t *ring;
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} ALCportCapture;
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static int ALCportCapture_ReadCallback(const void *inputBuffer, void *outputBuffer,
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unsigned long framesPerBuffer, const PaStreamCallbackTimeInfo *timeInfo,
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const PaStreamCallbackFlags statusFlags, void *userData);
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static void ALCportCapture_Construct(ALCportCapture *self, ALCdevice *device);
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static void ALCportCapture_Destruct(ALCportCapture *self);
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static ALCenum ALCportCapture_open(ALCportCapture *self, const ALCchar *name);
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static void ALCportCapture_close(ALCportCapture *self);
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static DECLARE_FORWARD(ALCportCapture, ALCbackend, ALCboolean, reset)
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static ALCboolean ALCportCapture_start(ALCportCapture *self);
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static void ALCportCapture_stop(ALCportCapture *self);
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static ALCenum ALCportCapture_captureSamples(ALCportCapture *self, ALCvoid *buffer, ALCuint samples);
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static ALCuint ALCportCapture_availableSamples(ALCportCapture *self);
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static DECLARE_FORWARD(ALCportCapture, ALCbackend, ClockLatency, getClockLatency)
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static DECLARE_FORWARD(ALCportCapture, ALCbackend, void, lock)
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static DECLARE_FORWARD(ALCportCapture, ALCbackend, void, unlock)
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DECLARE_DEFAULT_ALLOCATORS(ALCportCapture)
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DEFINE_ALCBACKEND_VTABLE(ALCportCapture);
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static void ALCportCapture_Construct(ALCportCapture *self, ALCdevice *device)
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{
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ALCbackend_Construct(STATIC_CAST(ALCbackend, self), device);
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SET_VTABLE2(ALCportCapture, ALCbackend, self);
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self->stream = NULL;
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}
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static void ALCportCapture_Destruct(ALCportCapture *self)
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{
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if(self->stream)
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Pa_CloseStream(self->stream);
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self->stream = NULL;
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if(self->ring)
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ll_ringbuffer_free(self->ring);
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self->ring = NULL;
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ALCbackend_Destruct(STATIC_CAST(ALCbackend, self));
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}
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static int ALCportCapture_ReadCallback(const void *inputBuffer, void *UNUSED(outputBuffer),
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unsigned long framesPerBuffer, const PaStreamCallbackTimeInfo *UNUSED(timeInfo),
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const PaStreamCallbackFlags UNUSED(statusFlags), void *userData)
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{
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ALCportCapture *self = userData;
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size_t writable = ll_ringbuffer_write_space(self->ring);
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if(framesPerBuffer > writable)
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framesPerBuffer = writable;
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ll_ringbuffer_write(self->ring, inputBuffer, framesPerBuffer);
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return 0;
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}
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static ALCenum ALCportCapture_open(ALCportCapture *self, const ALCchar *name)
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{
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ALCdevice *device = STATIC_CAST(ALCbackend, self)->mDevice;
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ALuint samples, frame_size;
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PaError err;
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if(!name)
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name = pa_device;
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else if(strcmp(name, pa_device) != 0)
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return ALC_INVALID_VALUE;
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samples = device->UpdateSize * device->NumUpdates;
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samples = maxu(samples, 100 * device->Frequency / 1000);
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frame_size = FrameSizeFromDevFmt(device->FmtChans, device->FmtType);
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self->ring = ll_ringbuffer_create(samples, frame_size);
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if(self->ring == NULL) return ALC_INVALID_VALUE;
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self->params.device = -1;
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if(!ConfigValueInt(NULL, "port", "capture", &self->params.device) ||
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self->params.device < 0)
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self->params.device = Pa_GetDefaultInputDevice();
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self->params.suggestedLatency = 0.0f;
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self->params.hostApiSpecificStreamInfo = NULL;
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switch(device->FmtType)
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{
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case DevFmtByte:
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self->params.sampleFormat = paInt8;
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break;
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case DevFmtUByte:
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self->params.sampleFormat = paUInt8;
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break;
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case DevFmtShort:
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self->params.sampleFormat = paInt16;
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break;
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case DevFmtInt:
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self->params.sampleFormat = paInt32;
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break;
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case DevFmtFloat:
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self->params.sampleFormat = paFloat32;
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break;
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case DevFmtUInt:
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case DevFmtUShort:
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ERR("%s samples not supported\n", DevFmtTypeString(device->FmtType));
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return ALC_INVALID_VALUE;
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}
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self->params.channelCount = ChannelsFromDevFmt(device->FmtChans);
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err = Pa_OpenStream(&self->stream, &self->params, NULL,
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device->Frequency, paFramesPerBufferUnspecified, paNoFlag,
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ALCportCapture_ReadCallback, self
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);
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if(err != paNoError)
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{
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ERR("Pa_OpenStream() returned an error: %s\n", Pa_GetErrorText(err));
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return ALC_INVALID_VALUE;
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}
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al_string_copy_cstr(&device->DeviceName, name);
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return ALC_NO_ERROR;
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}
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static void ALCportCapture_close(ALCportCapture *self)
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{
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PaError err = Pa_CloseStream(self->stream);
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if(err != paNoError)
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ERR("Error closing stream: %s\n", Pa_GetErrorText(err));
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self->stream = NULL;
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ll_ringbuffer_free(self->ring);
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self->ring = NULL;
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}
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static ALCboolean ALCportCapture_start(ALCportCapture *self)
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{
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PaError err = Pa_StartStream(self->stream);
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if(err != paNoError)
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{
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ERR("Error starting stream: %s\n", Pa_GetErrorText(err));
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return ALC_FALSE;
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}
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return ALC_TRUE;
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}
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static void ALCportCapture_stop(ALCportCapture *self)
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{
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PaError err = Pa_StopStream(self->stream);
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if(err != paNoError)
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ERR("Error stopping stream: %s\n", Pa_GetErrorText(err));
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}
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static ALCuint ALCportCapture_availableSamples(ALCportCapture *self)
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{
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return ll_ringbuffer_read_space(self->ring);
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}
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static ALCenum ALCportCapture_captureSamples(ALCportCapture *self, ALCvoid *buffer, ALCuint samples)
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{
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ll_ringbuffer_read(self->ring, buffer, samples);
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return ALC_NO_ERROR;
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}
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typedef struct ALCportBackendFactory {
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DERIVE_FROM_TYPE(ALCbackendFactory);
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} ALCportBackendFactory;
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#define ALCPORTBACKENDFACTORY_INITIALIZER { { GET_VTABLE2(ALCportBackendFactory, ALCbackendFactory) } }
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static ALCboolean ALCportBackendFactory_init(ALCportBackendFactory *self);
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static void ALCportBackendFactory_deinit(ALCportBackendFactory *self);
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static ALCboolean ALCportBackendFactory_querySupport(ALCportBackendFactory *self, ALCbackend_Type type);
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static void ALCportBackendFactory_probe(ALCportBackendFactory *self, enum DevProbe type);
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static ALCbackend* ALCportBackendFactory_createBackend(ALCportBackendFactory *self, ALCdevice *device, ALCbackend_Type type);
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DEFINE_ALCBACKENDFACTORY_VTABLE(ALCportBackendFactory);
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static ALCboolean ALCportBackendFactory_init(ALCportBackendFactory* UNUSED(self))
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{
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if(!pa_load())
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return ALC_FALSE;
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return ALC_TRUE;
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}
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static void ALCportBackendFactory_deinit(ALCportBackendFactory* UNUSED(self))
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{
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#ifdef HAVE_DYNLOAD
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if(pa_handle)
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{
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Pa_Terminate();
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CloseLib(pa_handle);
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pa_handle = NULL;
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}
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#else
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Pa_Terminate();
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#endif
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}
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static ALCboolean ALCportBackendFactory_querySupport(ALCportBackendFactory* UNUSED(self), ALCbackend_Type type)
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{
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if(type == ALCbackend_Playback || type == ALCbackend_Capture)
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return ALC_TRUE;
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return ALC_FALSE;
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}
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static void ALCportBackendFactory_probe(ALCportBackendFactory* UNUSED(self), enum DevProbe type)
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{
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switch(type)
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{
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case ALL_DEVICE_PROBE:
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AppendAllDevicesList(pa_device);
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break;
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case CAPTURE_DEVICE_PROBE:
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AppendCaptureDeviceList(pa_device);
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break;
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}
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}
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static ALCbackend* ALCportBackendFactory_createBackend(ALCportBackendFactory* UNUSED(self), ALCdevice *device, ALCbackend_Type type)
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{
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if(type == ALCbackend_Playback)
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{
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ALCportPlayback *backend;
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NEW_OBJ(backend, ALCportPlayback)(device);
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if(!backend) return NULL;
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return STATIC_CAST(ALCbackend, backend);
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}
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if(type == ALCbackend_Capture)
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{
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ALCportCapture *backend;
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NEW_OBJ(backend, ALCportCapture)(device);
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if(!backend) return NULL;
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return STATIC_CAST(ALCbackend, backend);
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}
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return NULL;
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}
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ALCbackendFactory *ALCportBackendFactory_getFactory(void)
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{
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static ALCportBackendFactory factory = ALCPORTBACKENDFACTORY_INITIALIZER;
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return STATIC_CAST(ALCbackendFactory, &factory);
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}
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