OpenTTD Source: src/music/cocoa_m.cpp Source File

OpenTTD Source 14.0-RC3

cocoa_m.cpp
Go to the documentation of this file.
1 /*
2 * This file is part of OpenTTD.
3 * 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.
4 * 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.
5 * 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/>.
6 */
7
14 #ifdef WITH_COCOA
15
16 #include "../stdafx.h"
17 #include "../os/macosx/macos.h"
18 #include "cocoa_m.h"
19 #include "midifile.hpp"
20 #include "../debug.h"
21 #include "../base_media_base.h"
22
23 #include <CoreServices/CoreServices.h>
24 #include <AudioUnit/AudioUnit.h>
25 #include <AudioToolbox/AudioToolbox.h>
26
27 #include "../safeguards.h"
28
29 #if !defined(HAVE_OSX_1011_SDK)
30 #define kMusicSequenceFile_AnyType 0
31 #endif
32
33 static FMusicDriver_Cocoa iFMusicDriver_Cocoa;
34
35
36 static MusicPlayer _player = nullptr;
37 static MusicSequence _sequence = nullptr;
38 static MusicTimeStamp _seq_length = 0;
39 static bool _playing = false;
40 static byte _volume = 127;
41
42
44 static void DoSetVolume()
45 {
46 if (_sequence == nullptr) return;
47
48 AUGraph graph;
49 MusicSequenceGetAUGraph(_sequence, &graph);
50
51 AudioUnit output_unit = nullptr;
52
53 /* Get output audio unit */
54 UInt32 node_count = 0;
55 AUGraphGetNodeCount(graph, &node_count);
56 for (UInt32 i = 0; i < node_count; i++) {
57 AUNode node;
58 AUGraphGetIndNode(graph, i, &node);
59
60 AudioUnit unit;
61 AudioComponentDescription desc;
62 AUGraphNodeInfo(graph, node, &desc, &unit);
63
64 if (desc.componentType == kAudioUnitType_Output) {
65 output_unit = unit;
66 break;
67 }
68 }
69 if (output_unit == nullptr) {
70 Debug(driver, 1, "cocoa_m: Failed to get output node to set volume");
71 return;
72 }
73
74 Float32 vol = _volume / 127.0f; // 0 - +127 -> 0.0 - 1.0
75 AudioUnitSetParameter(output_unit, kHALOutputParam_Volume, kAudioUnitScope_Global, 0, vol, 0);
76 }
77
78
82 const char *MusicDriver_Cocoa::Start(const StringList &)
83 {
84 if (NewMusicPlayer(&_player) != noErr) return "failed to create music player";
85
86 return nullptr;
87 }
88
89
93 bool MusicDriver_Cocoa::IsSongPlaying()
94 {
95 if (!_playing) return false;
96
97 MusicTimeStamp time = 0;
98 MusicPlayerGetTime(_player, &time);
99 return time < _seq_length;
100 }
101
102
106 void MusicDriver_Cocoa::Stop()
107 {
108 if (_player != nullptr) DisposeMusicPlayer(_player);
109 if (_sequence != nullptr) DisposeMusicSequence(_sequence);
110 }
111
112
118 void MusicDriver_Cocoa::PlaySong(const MusicSongInfo &song)
119 {
120 std::string filename = MidiFile::GetSMFFile(song);
121
122 Debug(driver, 2, "cocoa_m: trying to play '{}'", filename);
123
124 this->StopSong();
125 if (_sequence != nullptr) {
126 DisposeMusicSequence(_sequence);
127 _sequence = nullptr;
128 }
129
130 if (filename.empty()) return;
131
132 if (NewMusicSequence(&_sequence) != noErr) {
133 Debug(driver, 0, "cocoa_m: Failed to create music sequence");
134 return;
135 }
136
137 std::string os_file = OTTD2FS(filename);
138 CFAutoRelease<CFURLRef> url(CFURLCreateFromFileSystemRepresentation(kCFAllocatorDefault, (const UInt8*)os_file.c_str(), os_file.length(), false));
139
140 if (MusicSequenceFileLoad(_sequence, url.get(), kMusicSequenceFile_AnyType, 0) != noErr) {
141 Debug(driver, 0, "cocoa_m: Failed to load MIDI file");
142 return;
143 }
144
145 /* Construct audio graph */
146 AUGraph graph = nullptr;
147
148 MusicSequenceGetAUGraph(_sequence, &graph);
149 AUGraphOpen(graph);
150 if (AUGraphInitialize(graph) != noErr) {
151 Debug(driver, 0, "cocoa_m: Failed to initialize AU graph");
152 return;
153 }
154
155 /* Figure out sequence length */
156 UInt32 num_tracks;
157 MusicSequenceGetTrackCount(_sequence, &num_tracks);
158 _seq_length = 0;
159 for (UInt32 i = 0; i < num_tracks; i++) {
160 MusicTrack track = nullptr;
161 MusicTimeStamp track_length = 0;
162 UInt32 prop_size = sizeof(MusicTimeStamp);
163 MusicSequenceGetIndTrack(_sequence, i, &track);
164 MusicTrackGetProperty(track, kSequenceTrackProperty_TrackLength, &track_length, &prop_size);
165 if (track_length > _seq_length) _seq_length = track_length;
166 }
167 /* Add 8 beats for reverb/long note release */
168 _seq_length += 8;
169
170 DoSetVolume();
171 MusicPlayerSetSequence(_player, _sequence);
172 MusicPlayerPreroll(_player);
173 if (MusicPlayerStart(_player) != noErr) return;
174 _playing = true;
175
176 Debug(driver, 3, "cocoa_m: playing '{}'", filename);
177 }
178
179
183 void MusicDriver_Cocoa::StopSong()
184 {
185 MusicPlayerStop(_player);
186 MusicPlayerSetSequence(_player, nullptr);
187 _playing = false;
188 }
189
190
196 void MusicDriver_Cocoa::SetVolume(byte vol)
197 {
198 _volume = vol;
199 DoSetVolume();
200 }
201
202 #endif /* WITH_COCOA */
MusicDriver_Cocoa::SetVolume
void SetVolume(byte vol) override
Set the volume, if possible.
MusicDriver_Cocoa::IsSongPlaying
bool IsSongPlaying() override
Are we currently playing a song?
CFAutoRelease
std::unique_ptr< typename std::remove_pointer< T >::type, CFDeleter< typename std::remove_pointer< T >::type > > CFAutoRelease
Specialisation of std::unique_ptr for CoreFoundation objects.
Definition: macos.h:54
FMusicDriver_Cocoa
Definition: cocoa_m.h:31
MusicDriver_Cocoa::PlaySong
void PlaySong(const MusicSongInfo &song) override
Play a particular song.
Debug
#define Debug(category, level, format_string,...)
Ouptut a line of debugging information.
Definition: debug.h:37
MusicDriver_Cocoa::Start
const char * Start(const StringList &param) override
Start this driver.
cocoa_m.h
MusicSongInfo
Metadata about a music track.
Definition: base_media_base.h:325
StringList
std::vector< std::string > StringList
Type for a list of strings.
Definition: string_type.h:60
MusicDriver_Cocoa::StopSong
void StopSong() override
Stop playing the current song.
MidiFile::GetSMFFile
static std::string GetSMFFile(const MusicSongInfo &song)
Get the name of a Standard MIDI File for a given song.
Definition: midifile.cpp:1039
MusicDriver_Cocoa::Stop
void Stop() override
Stop this driver.
OTTD2FS
std::wstring OTTD2FS(const std::string &name)
Convert from OpenTTD's encoding to a wide string.
Definition: win32.cpp:479