AudioClip.cpp

#include "AudioClip.h"

Mci::Mci() {
	HINSTANCE hins = LoadLibraryA("winmm.dll");
	wmci = (w32mci)GetProcAddress(hins, "mciSendStringA");
	wmcierror = (w32mcierror)GetProcAddress(hins, "mciGetErrorStringA");	
}

Mci::~Mci() {
	FreeLibrary(hins);
}

bool Mci::send(std::string command) {
	int errcode = wmci(command.c_str(), buf, 254, 0);
	if(errcode) {
		wmcierror(errcode, buf, 254);
		return false;
	}
	return true;
}

AudioClip::AudioClip() {
}

AudioClip::~AudioClip() {
	std::string cmd;
	cmd = "close " + alias;
	mci.send(cmd);
}

bool AudioClip::load(const std::string& _filename) {
	filename = _filename;
	for(char& c : filename) if(c == '/') c = '\\';
	alias = "mp3_";
	srand(time(NULL));
	char randstr[6];
	_itoa(rand() % 65536, randstr, 10);
	alias.append(randstr);
	std::string cmd;
	cmd = "open " + filename + " alias " + alias;
	if(mci.send(cmd) == false) return false;
	cmd = "set " + alias + " time format milliseconds";
	if(mci.send(cmd) == false) return false;
	cmd = "status " + alias + " length";
	if(mci.send(cmd) == false) return false;
	length_ms = atoi(mci.buf);
	return true;
}

bool AudioClip::play(int start_ms, int end_ms) {
	if(end_ms == -1) end_ms = length_ms;
	std::string cmd;
	char start_str[16], end_str[16];
	_itoa(start_ms, start_str, 10);
	_itoa(end_ms, end_str, 10);
	cmd = "play " + alias + " from ";
	cmd.append(start_str);
	cmd.append(" to ");
	cmd.append(end_str);
	return mci.send(cmd);
}

bool AudioClip::stop() {
	std::string cmd;
	cmd = "stop " + alias;
	if(mci.send(cmd) == false) return false;
	cmd = "seek " + alias + " to start";
	if(mci.send(cmd) == false) return false;
	return true;
}

bool AudioClip::pause() {
	std::string cmd;
	cmd = "pause " + alias;
	if(mci.send(cmd) == false) return false;
	return true;
}

bool AudioClip::unpause() {
	std::string cmd;
	cmd = "resume " + alias;
	if(mci.send(cmd) == false) return false;
	return true;
}

int AudioClip::milliseconds() {
	return length_ms;
}