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#include <algorithm>
#include <string>
#include <stdio.h>
#include <unistd.h>
#include <fcntl.h>
#include <dlfcn.h>
#include "device_extern.h"
#include "debug.h"
namespace audiere {
#ifndef RTLD_LOCAL
#define RTLD_LOCAL 0
#endif
#ifndef RTLD_NOW
#define RTLD_NOW 0
#endif
ExternAudioDevice::ExternModule::ExternModule() :
m_open(0), m_start(0),
m_stop(0), m_write(0),
m_close(0), m_handle(0)
{
}
ExternAudioDevice::ExternModule::ExternModule(const ExternModule &other) :
m_open(other.m_open), m_start(other.m_start),
m_stop(other.m_stop), m_write(other.m_write),
m_close(other.m_close), m_handle(other.m_handle)
{
}
bool ExternAudioDevice::ExternModule::init(const char *name)
{
void* m_handle = dlopen(name, RTLD_LOCAL | RTLD_NOW);
if (!m_handle)
return false;
m_open = (DeviceOpenProc)dlsym(m_handle, "AudioDeviceOpen");
m_start = (DeviceStartProc)dlsym(m_handle, "AudioDeviceStart");
m_stop = (DeviceStopProc)dlsym(m_handle, "AudioDeviceStop");
m_write = (DeviceWriteProc)dlsym(m_handle, "AudioDeviceWrite");
m_close = (DeviceCloseProc)dlsym(m_handle, "AudioDeviceClose");
if (!m_open || !m_start || !m_stop || !m_write || !m_close) {
dlclose(m_handle);
m_handle = 0;
return false;
}
return true;
}
void ExternAudioDevice::ExternModule::uninit()
{
if (!m_handle)
return;
m_open = 0;
m_start = 0;
m_stop = 0;
m_write = 0;
m_close = 0;
dlclose(m_handle);
m_handle = 0;
}
ExternAudioDevice*
ExternAudioDevice::create(const ParameterList& parameters) {
int ret;
ExternModule module;
if (!module.init("./libExtAudioDevice.so") &&
!module.init("libExtAudioDevice.so"))
return 0;
ret = module.open(44100, 2, 16, 1);
if (ret != 0)
{
ADR_LOG("Unable to open audio device\n");
module.uninit();
return 0;
}
ret = module.start();
if (ret != 0)
{
ADR_LOG("Unable to set audio device to play state\n");
module.close();
module.uninit();
return 0;
}
return new ExternAudioDevice(module, 44100, 4096);
}
ExternAudioDevice::ExternAudioDevice(ExternModule module,
int rate,
int buffer_size)
: MixerDevice(rate), m_module(module), m_rate(rate)
{
m_buffer_size = buffer_size;
m_buffer = new char [buffer_size];
}
ExternAudioDevice::~ExternAudioDevice() {
ADR_GUARD("ExternAudioDevice::~ExternAudioDevice");
m_module.stop();
m_module.close();
m_module.uninit();
delete [] m_buffer;
}
void ADR_CALL
ExternAudioDevice::update() {
int sample_len;
size_t sample_left;
char* sample_buf;
sample_buf = m_buffer;
sample_len = m_buffer_size / 4;
sample_left = read(sample_len, sample_buf);
while (sample_left > 0) {
if (m_module.write(sample_buf, sample_left * 4) < 0) {
AI_Sleep(2);
} else {
sample_left = 0;
}
}
}
const char* ADR_CALL
ExternAudioDevice::getName() {
return "extern";
}
}
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