mirror of
https://github.com/JGRennison/OpenTTD-patches.git
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242 lines
6.1 KiB
C++
242 lines
6.1 KiB
C++
/* $Id$ */
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/*
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* This file is part of OpenTTD.
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* OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
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* OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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* See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
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*/
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/**
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* @file cocoa_m.cpp
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* @brief MIDI music player for MacOS X using CoreAudio.
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*/
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#ifdef WITH_COCOA
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#include "../stdafx.h"
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#include "../os/macosx/macos.h"
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#include "cocoa_m.h"
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#include "../debug.h"
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#define Rect OTTDRect
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#define Point OTTDPoint
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#include <CoreServices/CoreServices.h>
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#include <AudioUnit/AudioUnit.h>
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#include <AudioToolbox/AudioToolbox.h>
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#undef Rect
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#undef Point
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static FMusicDriver_Cocoa iFMusicDriver_Cocoa;
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static MusicPlayer _player = NULL;
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static MusicSequence _sequence = NULL;
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static MusicTimeStamp _seq_length = 0;
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static bool _playing = false;
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static byte _volume = 127;
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/** Set the volume of the current sequence. */
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static void DoSetVolume()
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{
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if (_sequence == NULL) return;
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AUGraph graph;
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MusicSequenceGetAUGraph(_sequence, &graph);
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AudioUnit output_unit = NULL;
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/* Get output audio unit */
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UInt32 node_count = 0;
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AUGraphGetNodeCount(graph, &node_count);
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for (UInt32 i = 0; i < node_count; i++) {
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AUNode node;
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AUGraphGetIndNode(graph, i, &node);
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AudioUnit unit;
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OSType comp_type = 0;
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#if (MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_5)
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if (MacOSVersionIsAtLeast(10, 5, 0)) {
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/* The 10.6 SDK has changed the function prototype of
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* AUGraphNodeInfo. This is a binary compatible change,
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* but we need to get the type declaration right or
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* risk compilation errors. The header AudioComponent.h
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* was introduced in 10.6 so use it to decide which
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* type definition to use. */
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#ifdef __AUDIOCOMPONENT_H__
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AudioComponentDescription desc;
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#else
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ComponentDescription desc;
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#endif
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AUGraphNodeInfo(graph, node, &desc, &unit);
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comp_type = desc.componentType;
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} else
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#endif
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{
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#if (MAC_OS_X_VERSION_MIN_REQUIRED < MAC_OS_X_VERSION_10_5)
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ComponentDescription desc;
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AUGraphGetNodeInfo(graph, node, &desc, NULL, NULL, &unit);
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comp_type = desc.componentType;
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#endif
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}
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if (comp_type == kAudioUnitType_Output) {
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output_unit = unit;
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break;
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}
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}
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if (output_unit == NULL) {
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DEBUG(driver, 1, "cocoa_m: Failed to get output node to set volume");
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return;
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}
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Float32 vol = _volume / 127.0f; // 0 - +127 -> 0.0 - 1.0
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AudioUnitSetParameter(output_unit, kHALOutputParam_Volume, kAudioUnitScope_Global, 0, vol, 0);
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}
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/**
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* Initialized the MIDI player, including QuickTime initialization.
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*/
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const char *MusicDriver_Cocoa::Start(const char * const *parm)
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{
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if (NewMusicPlayer(&_player) != noErr) return "failed to create music player";
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return NULL;
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}
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/**
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* Checks wether the player is active.
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*/
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bool MusicDriver_Cocoa::IsSongPlaying()
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{
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if (!_playing) return false;
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MusicTimeStamp time = 0;
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MusicPlayerGetTime(_player, &time);
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return time < _seq_length;
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}
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/**
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* Stops the MIDI player.
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*/
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void MusicDriver_Cocoa::Stop()
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{
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if (_player != NULL) DisposeMusicPlayer(_player);
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if (_sequence != NULL) DisposeMusicSequence(_sequence);
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}
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/**
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* Starts playing a new song.
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*
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* @param filename Path to a MIDI file.
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*/
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void MusicDriver_Cocoa::PlaySong(const char *filename)
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{
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DEBUG(driver, 2, "cocoa_m: trying to play '%s'", filename);
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this->StopSong();
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if (_sequence != NULL) {
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DisposeMusicSequence(_sequence);
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_sequence = NULL;
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}
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if (NewMusicSequence(&_sequence) != noErr) {
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DEBUG(driver, 0, "cocoa_m: Failed to create music sequence");
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return;
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}
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const char *os_file = OTTD2FS(filename);
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CFURLRef url = CFURLCreateFromFileSystemRepresentation(kCFAllocatorDefault, (const UInt8*)os_file, strlen(os_file), false);
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#if (MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_5)
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if (MacOSVersionIsAtLeast(10, 5, 0)) {
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if (MusicSequenceFileLoad(_sequence, url, 0, 0) != noErr) {
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DEBUG(driver, 0, "cocoa_m: Failed to load MIDI file");
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CFRelease(url);
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return;
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}
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} else
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#endif
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{
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#if (MAC_OS_X_VERSION_MIN_REQUIRED < MAC_OS_X_VERSION_10_5)
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FSRef ref_file;
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if (!CFURLGetFSRef(url, &ref_file)) {
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DEBUG(driver, 0, "cocoa_m: Failed to make FSRef");
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CFRelease(url);
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return;
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}
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if (MusicSequenceLoadSMFWithFlags(_sequence, &ref_file, 0) != noErr) {
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DEBUG(driver, 0, "cocoa_m: Failed to load MIDI file old style");
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CFRelease(url);
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return;
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}
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#endif
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}
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CFRelease(url);
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/* Construct audio graph */
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AUGraph graph = NULL;
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MusicSequenceGetAUGraph(_sequence, &graph);
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AUGraphOpen(graph);
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if (AUGraphInitialize(graph) != noErr) {
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DEBUG(driver, 0, "cocoa_m: Failed to initialize AU graph");
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return;
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}
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/* Figure out sequence length */
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UInt32 num_tracks;
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MusicSequenceGetTrackCount(_sequence, &num_tracks);
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_seq_length = 0;
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for (UInt32 i = 0; i < num_tracks; i++) {
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MusicTrack track = NULL;
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MusicTimeStamp track_length = 0;
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UInt32 prop_size = sizeof(MusicTimeStamp);
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MusicSequenceGetIndTrack(_sequence, i, &track);
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MusicTrackGetProperty(track, kSequenceTrackProperty_TrackLength, &track_length, &prop_size);
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if (track_length > _seq_length) _seq_length = track_length;
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}
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/* Add 8 beats for reverb/long note release */
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_seq_length += 8;
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DoSetVolume();
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MusicPlayerSetSequence(_player, _sequence);
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MusicPlayerPreroll(_player);
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if (MusicPlayerStart(_player) != noErr) return;
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_playing = true;
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DEBUG(driver, 3, "cocoa_m: playing '%s'", filename);
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}
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/**
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* Stops playing the current song, if the player is active.
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*/
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void MusicDriver_Cocoa::StopSong()
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{
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MusicPlayerStop(_player);
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MusicPlayerSetSequence(_player, NULL);
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_playing = false;
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}
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/**
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* Changes the playing volume of the MIDI player.
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*
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* @param vol The desired volume, range of the value is @c 0-127
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*/
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void MusicDriver_Cocoa::SetVolume(byte vol)
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{
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_volume = vol;
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DoSetVolume();
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}
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#endif /* WITH_COCOA */
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