music-player.cpp
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music-player.cpp
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	#ifdef USE_ALLEGRO
	#include <allegro.h>
	#endif

	#include "music-player.h"
	#include "globals.h"
	#include "util/debug.h"
	#include <iostream>
	#include "configuration.h"
	#include "sound.h"
	#include "dumb/include/dumb.h"
	#include "gme/Music_Emu.h"
	#include "exceptions/exception.h"
	#include <sstream>

	#ifdef USE_ALLEGRO
	#include "dumb/include/aldumb.h"
	#include "ogg/logg.h"

	#ifdef _WIN32
	/* what do we need winalleg for?
	* reason: ...
	*/
	#include <winalleg.h>
	#endif

	#endif

	#ifdef HAVE_MP3_MPG123
	#include <mpg123.h>
	#endif

	#ifdef HAVE_MP3_MAD
	#include <mad.h>
	#endif

	#ifdef USE_SDL
	#include "sdl/mixer/SDL_mixer.h"
	#endif

	namespace Util{

	class MusicException: public Exception::Base {
	public:
	MusicException(const std::string & file, int line, const std::string & reason):
	Exception::Base(file, line),
	reason(reason){
	}

	MusicException(const MusicException & copy):
	Exception::Base(copy),
	reason(copy.reason){
	}

	virtual ~MusicException() throw(){
	}

	protected:
	virtual const std::string getReason() const {
	return reason;
	}

	virtual Exception::Base * copy() const {
	return new MusicException(*this);
	}

	std::string reason;
	};

	static double scaleVolume(double start){
	return start;
	}

	MusicPlayer::MusicPlayer():
	volume(1.0){
	}

	MusicPlayer::~MusicPlayer(){
	}

	static const char * typeToExtension( int i ){
	switch (i){
	case 0 : return ".xm";
	case 1 : return ".s3m";
	case 2 : return ".it";
	case 3 : return ".mod";
	default : return "";
	}
	}

	DUH * DumbPlayer::loadDumbFile(const char * path){
	DUH * what;
	for (int i = 0; i < 4; i++){
	/* the order of trying xm/s3m/it/mod matters because mod could be
	* confused with one of the other formats, so load it last.
	*/
	switch (i){
	case 0 : {
	what = dumb_load_xm_quick(path);
	break;
	}
	case 1 : {
	what = dumb_load_s3m_quick(path);
	break;
	}
	case 2 : {
	what = dumb_load_it_quick(path);
	break;
	}
	case 3 : {
	what = dumb_load_mod_quick(path);
	break;
	}
	}

	if (what != NULL){
	Global::debug(0) << "Loaded " << path << " type " << typeToExtension(i) << "(" << i << ")" << std::endl;
	return what;
	}
	}
	return NULL;
	}

	/* shared by various implementations */
	#ifdef HAVE_MP3_MPG123
	/* initialize the mpg123 library and open up an mp3 file for reading */
	static void initializeMpg123(mpg123_handle ** mp3, const char * path){
	/* Initialize */
	if (mpg123_init() != MPG123_OK){
	throw MusicException(__FILE__, __LINE__, "Could not initialize mpg123");
	}
	try{
	*mp3 = mpg123_new(NULL, NULL);
	if (*mp3 == NULL){
	throw MusicException(__FILE__,__LINE__, "Could not allocate mpg handle");
	}
	mpg123_format_none(*mp3);

	/* allegro wants unsigned samples but mpg123 can't actually provide unsigned
	* samples even though it has an enum for it, MPG123_ENC_UNSIGNED_16. this
	* was rectified in 1.13.0 or something, but for now signed samples are ok.
	*/
	int error = mpg123_format(*mp3, Sound::FREQUENCY, MPG123_STEREO, MPG123_ENC_SIGNED_16);
	if (error != MPG123_OK){
	Global::debug(0) << "Could not set format for mpg123 handle" << std::endl;
	}

	/* FIXME workaround for libmpg issues with "generic" decoder frequency not being set */
	error = mpg123_open(mp3, (char) path);
	if (error == -1){
	std::ostringstream error;
	error << "Could not open mpg123 file " << path << " error code " << error;
	throw MusicException(__FILE__,__LINE__, error.str());
	}

	/* reading a frame is the only surefire way to get mpg123 to set the
	* sampling_frequency which it needs to set the decoder a few lines below
	*/
	unsigned char tempBuffer[4096];
	error = mpg123_read(*mp3, tempBuffer, sizeof(tempBuffer), NULL);
	if (error != MPG123_OK){
	std::ostringstream error;
	error << "Could not read mpg123 file " << path << " error code " << error;
	throw MusicException(__FILE__,__LINE__, error.str());
	}
	mpg123_close(*mp3);

	/* stream has progressed a little bit so reset it by opening it again */
	error = mpg123_open(mp3, (char) path);
	if (error == -1){
	std::ostringstream error;
	error << "Could not open mpg123 file " << path << " error code " << error;
	throw MusicException(__FILE__,__LINE__, error.str());
	}
	/* FIXME end */

	/* some of the native decoders aren't stable in older versions of mpg123
	* so just use generic for now. 1.13.1 should work better
	*/
	error = mpg123_decoder(*mp3, "generic");
	if (error != MPG123_OK){
	std::ostringstream error;
	error << "Could not use 'generic' mpg123 decoder for " << path << " error code " << error;
	throw MusicException(__FILE__,__LINE__, error.str());
	}
	// Global::debug(0) << "mpg support " << mpg123_format_support(mp3, Sound::FREQUENCY, MPG123_ENC_SIGNED_16) << std::endl;

	/*
	double base, really, rva;
	mpg123_getvolume(*mp3, &base, &really, &rva);
	// Global::debug(0) << "mpg volume base " << base << " really " << really << " rva " << rva << std::endl;
	base_volume = base;

	long rate;
	int channels, encoding;
	mpg123_getformat(*mp3, &rate, &channels, &encoding);
	// Global::debug(0) << path << " rate " << rate << " channels " << channels << " encoding " << encoding << std::endl;
	*/
	} catch (const MusicException & fail){
	if (*mp3 != NULL){
	mpg123_close(*mp3);
	mpg123_delete(*mp3);
	*mp3 = NULL;
	}
	mpg123_exit();
	throw;
	}
	}
	#endif

	#ifdef USE_ALLEGRO

	static int ALLEGRO_MONO = 0;
	static int ALLEGRO_STEREO = 1;

	DumbPlayer::DumbPlayer(const char * path){
	music_file = loadDumbFile(path);
	if (music_file != NULL){
	int buf = 1 << 11;
	player = al_start_duh(music_file, 2, 0, scaleVolume(volume), buf, Sound::FREQUENCY);
	} else {
	std::ostringstream error;
	error << "Could not load DUMB file " << path;
	throw MusicException(__FILE__, __LINE__, error.str());
	}
	}

	void DumbPlayer::play(){
	al_resume_duh(this->player);
	}

	void DumbPlayer::poll(){
	if (al_poll_duh(this->player) != 0){
	}
	}

	void DumbPlayer::pause(){
	al_pause_duh(this->player);
	}

	void DumbPlayer::setVolume(double volume){
	this->volume = volume;
	al_duh_set_volume(player, scaleVolume(volume));
	}

	DumbPlayer::~DumbPlayer(){
	al_stop_duh(player);
	unload_duh(music_file);
	}

	static const int GME_BUFFER_SIZE = 1 << 11;
	GMEPlayer::GMEPlayer(const char * path){
	gme_err_t fail = gme_open_file(path, &emulator, Sound::FREQUENCY);
	if (fail != NULL){
	Global::debug(0) << "GME load error for " << path << ": " << fail << std::endl;
	throw MusicException(__FILE__, __LINE__, "Could not load GME file");
	}
	emulator->start_track(0);
	Global::debug(0) << "Loaded GME file " << path << std::endl;

	stream = play_audio_stream(GME_BUFFER_SIZE, 16, ALLEGRO_STEREO, Sound::FREQUENCY, 255, 128);
	voice_set_priority(stream->voice, 255);
	}

	void GMEPlayer::play(){
	voice_start(stream->voice);
	}

	void GMEPlayer::poll(){
	short * buffer = (short*) get_audio_stream_buffer(stream);
	if (buffer){
	/* size in 16-bit samples is buffer size * channels */
	emulator->play(GME_BUFFER_SIZE * 2, buffer);
	if (emulator->track_ended()){
	gme_info_t * info;
	gme_track_info(emulator, &info, 0);
	int intro = info->intro_length;
	emulator->start_track(0);
	// Global::debug(0) << "Seeking " << intro << "ms. Track length " << info->length << "ms" << std::endl;
	/* skip past the intro if there is a loop */
	if (info->loop_length != 0){
	emulator->seek(intro);
	}
	}

	/* allegro wants unsigned data but gme produces signed so to convert
	* signed samples to unsigned samples we have to raise each value
	* by half the maximum value of a short (0xffff+1)/2 = 0x8000
	*/
	for (int i = 0; i < GME_BUFFER_SIZE * 2; i++){
	buffer[i] *= volume;
	buffer[i] += 0x8000;
	}

	free_audio_stream_buffer(stream);
	}
	}

	void GMEPlayer::pause(){
	voice_stop(stream->voice);
	}

	void GMEPlayer::setVolume(double volume){
	this->volume = volume;
	}

	GMEPlayer::~GMEPlayer(){
	delete emulator;
	stop_audio_stream(stream);
	}

	#ifdef HAVE_OGG
	OggPlayer::OggPlayer(const char * path){
	stream = logg_get_stream(path, scaleVolume(volume) * 255, 128, 1);
	if (stream == NULL){
	throw MusicException(__FILE__, __LINE__, "Could not load ogg file");
	}
	}

	void OggPlayer::play(){
	}

	void OggPlayer::poll(){
	logg_update_stream(stream);
	}

	void OggPlayer::pause(){
	}

	void OggPlayer::setVolume(double volume){
	}

	OggPlayer::~OggPlayer(){
	logg_destroy_stream(stream);
	}
	#endif /* OGG */


	#ifdef HAVE_MP3_MPG123

	static const int MPG123_BUFFER_SIZE = 1 << 11;
	Mp3Player::Mp3Player(const char * path):
	stream(NULL),
	mp3(NULL){
	/* Initialize */
	#if 0
	if (mpg123_init() != MPG123_OK){
	throw MusicException(__FILE__, __LINE__, "Could not initialize mpg123");
	}
	try{
	mp3 = mpg123_new(NULL, NULL);
	if (mp3 == NULL){
	throw MusicException(__FILE__,__LINE__, "Could not allocate mpg handle");
	}
	mpg123_format_none(mp3);
	/* mpg123 didn't support unsigned before 1.7.0 */
	int error = mpg123_format(mp3, Sound::FREQUENCY, MPG123_STEREO, MPG123_ENC_SIGNED_16);
	mpg123_decoder(mp3, "generic");
	if (error != MPG123_OK){
	Global::debug(0) << "Could not set format for mpg123 handle" << std::endl;
	}
	error = mpg123_open(mp3, (char*) path);
	if (error == -1){
	std::ostringstream error;
	error << "Could not open mpg123 file " << path << " error code " << error;
	throw MusicException(__FILE__,__LINE__, error.str());
	}
	// Global::debug(0) << "mpg support " << mpg123_format_support(mp3, Sound::FREQUENCY, MPG123_ENC_SIGNED_16) << std::endl;

	double base, really, rva;
	mpg123_getvolume(mp3, &base, &really, &rva);
	// Global::debug(0) << "mpg volume base " << base << " really " << really << " rva " << rva << std::endl;
	base_volume = base;

	long rate;
	int channels, encoding;
	mpg123_getformat(mp3, &rate, &channels, &encoding);
	// Global::debug(0) << path << " rate " << rate << " channels " << channels << " encoding " << encoding << std::endl;
	stream = play_audio_stream(MPG123_BUFFER_SIZE, 16, ALLEGRO_STEREO, rate, 255, 128);
	voice_set_priority(stream->voice, 255);
	} catch (const MusicException & fail){
	mpg123_exit();
	throw;
	}
	#endif

	initializeMpg123(&mp3, path);
	long rate = 0;
	int channels = 0, encoding = 0;
	mpg123_getformat(mp3, &rate, &channels, &encoding);
	stream = play_audio_stream(MPG123_BUFFER_SIZE, 16, ALLEGRO_STEREO, rate, 255, 128);
	voice_set_priority(stream->voice, 255);
	}

	void Mp3Player::play(){
	voice_start(stream->voice);
	}

	void Mp3Player::poll(){
	short * buffer = (short*) get_audio_stream_buffer(stream);
	if (buffer){
	/* buffer * 4 for 16 bits per sample * 2 samples for stereo */
	size_t out = 0;
	mpg123_read(mp3, (unsigned char ) buffer, MPG123_BUFFER_SIZE 4, &out);

	/*
	long rate;
	int channels, encoding;
	mpg123_getformat(mp3, &rate, &channels, &encoding);
	Global::debug(0) << "rate " << rate << " channels " << channels << " encoding " << encoding << std::endl;
	*/

	// Global::debug(0) << "Decoded " << out << std::endl;
	for (int i = 0; i < MPG123_BUFFER_SIZE * 2; i++){
	// buffer[i] *= volume;
	buffer[i] += 0x8000;
	}
	free_audio_stream_buffer(stream);
	}
	}

	void Mp3Player::pause(){
	/* TODO */
	}

	void Mp3Player::setVolume(double volume){
	/*
	this->volume = volume;
	// mpg123_volume(mp3, volume * base_volume / 5000);
	mpg123_volume(mp3, 0.0001);
	*/
	// mpg123_volume(mp3, volume);
	}

	Mp3Player::~Mp3Player(){
	mpg123_close(mp3);
	mpg123_exit();
	stop_audio_stream(stream);
	}

	#endif /* MP3_MPG123 */

	#ifdef HAVE_MP3_MAD
	/* TODO */
	Mp3Player::Mp3Player(const char * path):
	stream(NULL){
	/* TODO */
	}

	void Mp3Player::play(){
	/* TODO */
	}

	void Mp3Player::poll(){
	/* TODO */
	}

	void Mp3Player::pause(){
	/* TODO */
	}

	void Mp3Player::setVolume(double volume){
	/* TODO */
	}

	Mp3Player::~Mp3Player(){
	/* TODO */
	}
	#endif /* MP3_MAD */

	#endif /* ALlEGRO */

	#ifdef USE_SDL
	DumbPlayer::DumbPlayer(const char * path){
	music_file = loadDumbFile(path);
	if (music_file == NULL){
	std::ostringstream error;
	error << "Could not load DUMB file " << path;
	throw MusicException(__FILE__, __LINE__, error.str());
	}

	int n_channels = 2;
	int position = 0;
	renderer = duh_start_sigrenderer(music_file, 0, n_channels, position);
	if (!renderer){
	Global::debug(0) << "Could not create renderer" << std::endl;
	throw Exception::Base(__FILE__, __LINE__);
	}
	}

	void DumbPlayer::render(Uint8 * stream, int length){
	double delta = 65536.0 / Sound::FREQUENCY;

	/* a frame is 32 bits, 16 bit samples with 2 channels = 2 * 16,
	* so we have to divide the number of 'dumb samples' by the
	* size of each frame, 32 bits = 4 bytes
	*/
	/* FIXME: use global music volume to scale the output here */
	int n = duh_render(renderer, 16, 0, volume, delta, length / 4, stream);

	if (n == 0){
	Global::debug(0) << "Sound finished?" << std::endl;
	}

	/*
	short large = 0;
	for (int i = 0; i < length / 2; i++){
	short z = ((short *) stream)[i];
	if (z < 0){
	z = -z;
	}
	if (z > large){
	large = z;
	}
	}
	Global::debug(0) << "Largest amplitude " << large << std::endl;
	*/
	}

	struct DumbPlayerInfo{
	MusicPlayer * who;
	};

	void DumbPlayer::mixer(void * player_, Uint8 * stream, int length){
	DumbPlayerInfo * info = (DumbPlayerInfo *) player_;
	DumbPlayer * player = (DumbPlayer *) info->who;
	player->render(stream, length);
	}

	void DumbPlayer::pause(){
	Mix_HookMusic(NULL, NULL);
	}

	void DumbPlayer::play(){
	DumbPlayerInfo * me = new DumbPlayerInfo;
	me->who = this;
	Mix_HookMusic(mixer, me);
	}

	void DumbPlayer::poll(){
	}

	/* volume should be in the range 0.0 to 1.0 */
	void DumbPlayer::setVolume(double volume){
	this->volume = volume;
	/* Mix_VolumeMusic only handles volume for formats it handles natively.
	* for custom formats (like all these players) we have to handle volume
	* ourselves.
	*/
	// Mix_VolumeMusic(MIX_MAX_VOLUME * volume);
	}

	DumbPlayer::~DumbPlayer(){
	DumbPlayerInfo * info = (DumbPlayerInfo*) Mix_GetMusicHookData();
	Mix_HookMusic(NULL, NULL);
	if (info != NULL){
	delete info;
	}
	/* I'm pretty sure if we get this far then there is no chance
	* that our mixer function will still be active.
	*/
	duh_end_sigrenderer(renderer);
	unload_duh(music_file);
	}

	struct GMEInfo{
	GMEPlayer * player;
	};

	GMEPlayer::GMEPlayer(const char * path){
	gme_err_t fail = gme_open_file(path, &emulator, Sound::FREQUENCY);
	if (fail != NULL){
	Global::debug(0) << "GME load error for " << path << ": " << fail << std::endl;
	throw MusicException(__FILE__, __LINE__, "Could not load GME file");
	}
	emulator->start_track(0);
	Global::debug(0) << "Loaded GME file " << path << std::endl;
	}

	void GMEPlayer::mixer(void * arg, Uint8 * stream, int length){
	GMEInfo * info = (GMEInfo*) arg;
	info->player->render(stream, length);
	}

	void GMEPlayer::render(Uint8 * stream, int length){
	/* length/2 to convert bytes to short */
	emulator->play(length / 2, (short*) stream);

	/* scale for volume */
	for (int i = 0; i < length / 2; i++){
	short & sample = ((short *) stream)[i];
	sample *= volume;
	}

	/*
	short large = 0;
	short small = 0;
	for (int i = 0; i < length / 2; i++){
	// ((short ) stream)[i] = 2;
	short z = ((short *) stream)[i];
	if (z < small){
	small = z;
	}
	if (z > large){
	large = z;
	}
	}
	Global::debug(0) << "Largest " << large << " Smallest " << small << std::endl;
	*/
	}

	void GMEPlayer::play(){
	GMEInfo * me = new GMEInfo;
	me->player = this;
	Mix_HookMusic(mixer, me);
	}

	void GMEPlayer::poll(){
	}

	void GMEPlayer::pause(){
	}

	void GMEPlayer::setVolume(double volume){
	this->volume = volume;
	// Mix_VolumeMusic(volume * MIX_MAX_VOLUME);
	}

	GMEPlayer::~GMEPlayer(){
	GMEInfo * info = (GMEInfo*) Mix_GetMusicHookData();
	Mix_HookMusic(NULL, NULL);
	if (info != NULL){
	delete info;
	}
	delete emulator;
	}

	#ifdef HAVE_OGG

	OggPlayer::OggPlayer(const char * path){
	music = Mix_LoadMUS(path);
	if (music == NULL){
	throw MusicException(__FILE__, __LINE__, "Could not load OGG file");
	}
	}

	void OggPlayer::play(){
	Mix_PlayMusic(music, -1);
	}

	void OggPlayer::poll(){
	}

	void OggPlayer::pause(){
	Mix_PauseMusic();
	}

	void OggPlayer::setVolume(double volume){
	this->volume = volume;
	Mix_VolumeMusic(volume * MIX_MAX_VOLUME);
	}

	OggPlayer::~OggPlayer(){
	Mix_FreeMusic(music);
	}

	#endif /* OGG */

	#ifdef HAVE_MP3_MPG123

	struct Mp3Info{
	Mp3Player * mp3;
	};

	Mp3Player::Mp3Player(const char * path):
	mp3(NULL){
	initializeMpg123(&mp3, path);
	}

	void Mp3Player::mixer(void * arg, Uint8 * stream, int length){
	Mp3Info * info = (Mp3Info *) arg;
	Mp3Player * player = (Mp3Player *) info->mp3;
	mpg123_read(player->mp3, stream, length, NULL);
	// Global::debug(0) << "decoder " << mpg123_current_decoder(player->mp3) << std::endl;
	}

	void Mp3Player::render(Uint8 * stream, int length){
	}

	void Mp3Player::play(){
	Mp3Info * me = new Mp3Info;
	me->mp3 = this;
	Mix_HookMusic(mixer, me);
	}

	void Mp3Player::poll(){
	/* TODO */
	}

	void Mp3Player::pause(){
	/* TODO */
	}

	void Mp3Player::setVolume(double volume){
	mpg123_volume(mp3, volume);
	}

	Mp3Player::~Mp3Player(){
	Mix_HookMusic(NULL, NULL);
	if (mp3 != NULL){
	mpg123_close(mp3);
	mpg123_delete(mp3);
	mp3 = NULL;
	}
	mpg123_exit();
	}

	#endif /* MP3_MPG123 */

	#ifdef HAVE_MP3_MAD
	/* TODO */
	Mp3Player::Mp3Player(const char * path){
	music = Mix_LoadMUS(path);
	if (music == NULL){
	throw MusicException(__FILE__, __LINE__, "Could not load MP3 file");
	}
	}

	void Mp3Player::play(){
	Mix_PlayMusic(music, 0);
	}

	void Mp3Player::poll(){
	/* TODO */
	}

	void Mp3Player::pause(){
	Mix_PauseMusic();
	}

	void Mp3Player::setVolume(double volume){
	this->volume = volume;
	Mix_VolumeMusic(volume * MIX_MAX_VOLUME);
	}

	Mp3Player::~Mp3Player(){
	Mix_FreeMusic(music);
	}
	#endif /* MP3_MAD */

	#endif /* SDL */

	#ifdef USE_ALLEGRO5
	GMEPlayer::GMEPlayer(const char * path){
	/* TODO */
	}

	void GMEPlayer::play(){
	/* TODO */
	}

	void GMEPlayer::poll(){
	/* TODO */
	}

	void GMEPlayer::pause(){
	/* TODO */
	}

	void GMEPlayer::setVolume(double volume){
	/* TODO */
	}

	GMEPlayer::~GMEPlayer(){
	/* TODO */
	}

	#ifdef HAVE_OGG
	OggPlayer::OggPlayer(const char * path){
	/* TODO */
	}

	void OggPlayer::play(){
	/* TODO */
	}

	void OggPlayer::poll(){
	/* TODO */
	}

	void OggPlayer::pause(){
	/* TODO */
	}

	void OggPlayer::setVolume(double volume){
	/* TODO */
	}

	OggPlayer::~OggPlayer(){
	/* TODO */
	}

	#endif

	#ifdef HAVE_MP3_MPG123

	Mp3Player::Mp3Player(const char * path):
	mp3(NULL){
	/* Initialize */
	if (mpg123_init() != MPG123_OK){
	throw MusicException(__FILE__, __LINE__, "Could not initialize mpg123");
	}
	int error = mpg123_open(mp3, path);
	if (mp3 == NULL){
	throw MusicException(__FILE__,__LINE__, "Problem loading file.");
	}
	}

	void Mp3Player::play(){
	/* TODO */
	}

	void Mp3Player::poll(){
	/* TODO */
	}

	void Mp3Player::pause(){
	/* TODO */
	}

	void Mp3Player::setVolume(double volume){
	mpg123_volume(mp3, volume);
	}

	Mp3Player::~Mp3Player(){
	mpg123_close(mp3);
	mpg123_exit();
	}

	#endif /* MP3_MPG123 */

	#ifdef HAVE_MP3_MAD
	/* TODO */
	Mp3Player::Mp3Player(const char * path){
	/* TODO */
	}

	void Mp3Player::play(){
	/* TODO */
	}

	void Mp3Player::poll(){
	/* TODO */
	}

	void Mp3Player::pause(){
	/* TODO */
	}

	void Mp3Player::setVolume(double volume){
	/* TODO */
	}

	Mp3Player::~Mp3Player(){
	/* TODO */
	}
	#endif /* MP3_MAD */

	DumbPlayer::DumbPlayer(const char * path){
	/* TODO */
	}

	void DumbPlayer::play(){
	/* TODO */
	}

	void DumbPlayer::poll(){
	/* TODO */
	}

	void DumbPlayer::pause(){
	/* TODO */
	}

	void DumbPlayer::setVolume(double volume){
	/* TODO */
	}

	DumbPlayer::~DumbPlayer(){
	/* TODO */
	}

	#endif

	}

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