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/*
* AlsaParameters.cpp
*
* Created on: 7 Feb 2016
* Author: jeremy
*/
#include "AlsaParameters.h"
#include "../../Util/ErrorHandling.h"
#include <tinyxml2.h>
#include <iostream>
using namespace tinyxml2;
using namespace Util;
namespace Sound
{
void AlsaParameters::LoadAlsaParameters(const std::string& filePath, AlsaParams& parameters)
{
XMLDocument doc;
if(doc.LoadFile(filePath.c_str()) != XML_SUCCESS)
{
throw Exception("Could not load sound card parameters.", error_type_error);
}
XMLElement* root = doc.RootElement();
XMLElement* device = root->FirstChildElement("device");
XMLElement* capture = root->FirstChildElement("capture");
XMLElement* format = root->FirstChildElement("format");
XMLElement* sampleRate = root->FirstChildElement("sampleRate");
XMLElement* nChannels = root->FirstChildElement("nChannels");
XMLElement* bufferTime = root->FirstChildElement("bufferTime");
XMLElement* periodTime = root->FirstChildElement("periodTime");
XMLElement* access = root->FirstChildElement("access");
parameters.device = device->GetText();
parameters.capture = (bool) std::stoi(capture->GetText());
parameters.format = GetSndFormat(format->GetText());
parameters.sampleRate = (unsigned int) std::stoi(sampleRate->GetText());
parameters.nChannels = (unsigned int) std::stoi(nChannels->GetText());
parameters.bufferTime = (unsigned int) std::stoi(bufferTime->GetText());
parameters.periodTime = (unsigned int) std::stoi(periodTime->GetText());
parameters.access = GetAccessType(access->GetText());
return;
}
void AlsaParameters::SaveAlsaParameters(const std::string& filePath, const AlsaParams& parameters)
{
// Create document
XMLDocument doc;
// Add root element
XMLElement* root = doc.NewElement("root");
doc.InsertFirstChild(root);
// Create Elements
XMLElement* device = doc.NewElement("device");
XMLElement* capture = doc.NewElement("capture");
XMLElement* format = doc.NewElement("format");
XMLElement* sampleRate = doc.NewElement("sampleRate");
XMLElement* nChannels = doc.NewElement("nChannels");
XMLElement* bufferTime = doc.NewElement("bufferTime");
XMLElement* periodTime = doc.NewElement("periodTime");
XMLElement* access = doc.NewElement("access");
// Set values
device->SetText(parameters.device.data());
capture->SetText(int(parameters.capture));
format->SetText("SND_PCM_FORMAT_S16_LE"); // XXX: temporary
sampleRate->SetText(parameters.sampleRate);
nChannels->SetText(parameters.nChannels);
bufferTime->SetText(parameters.bufferTime);
periodTime->SetText(parameters.periodTime);
access->SetText("SND_PCM_ACCESS_RW_INTERLEAVED"); // XXX: temporary
// Insert all elements
root->InsertEndChild(device);
root->InsertEndChild(capture);
root->InsertEndChild(format);
root->InsertEndChild(sampleRate);
root->InsertEndChild(nChannels);
root->InsertEndChild(bufferTime);
root->InsertEndChild(periodTime);
root->InsertEndChild(access);
// Save modified file
auto result = doc.SaveFile(filePath.data());
if(XML_SUCCESS != result)
{
throw Exception("Could not save triggers configuration.", error_type_error);
}
return;
}
// PRIVATE
snd_pcm_format_t AlsaParameters::GetSndFormat(std::string formatName)
{
snd_pcm_format_t format;
std::map<std::string, snd_pcm_format_t> dic;
// Add definitions to dic
dic["SND_PCM_FORMAT_S16_LE"] = SND_PCM_FORMAT_S16_LE;
std::map< std::string, snd_pcm_format_t>::iterator i = dic.find(formatName);
if(i != dic.end())
format = i->second;
else
format = SND_PCM_FORMAT_S8; // Default value
return format;
}
snd_pcm_access_t AlsaParameters::GetAccessType(std::string accessName)
{
snd_pcm_access_t access;
std::map<std::string, snd_pcm_access_t> dic;
// Add definitions to dic
dic["SND_PCM_ACCESS_RW_INTERLEAVED"] = SND_PCM_ACCESS_RW_INTERLEAVED;
dic["SND_PCM_ACCESS_MMAP_INTERLEAVED"] = SND_PCM_ACCESS_MMAP_INTERLEAVED;
std::map< std::string, snd_pcm_access_t>::iterator i = dic.find(accessName);
if(i != dic.end())
access = i->second;
else
access = SND_PCM_ACCESS_RW_INTERLEAVED; // Default value
return access;
}
} /* namespace Sound */
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