aboutsummaryrefslogtreecommitdiffstats
path: root/mediaplugin/src/media/UAudioPlaybackBase.pas
blob: 5f31725734d120cd90af77ace27f5ee36a35ac21 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
{* UltraStar Deluxe - Karaoke Game
 *
 * UltraStar Deluxe is the legal property of its developers, whose names
 * are too numerous to list here. Please refer to the COPYRIGHT
 * file distributed with this source distribution.
 *
 * This program 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; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program 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.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; see the file COPYING. If not, write to
 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA 02110-1301, USA.
 *
 * $URL$
 * $Id$
 *}

unit UAudioPlaybackBase;

interface

{$IFDEF FPC}
  {$MODE Delphi}
{$ENDIF}

{$I switches.inc}

uses
  UMusic,
  UTime,
  UPath;

type
  TAudioPlaybackBase = class(TInterfacedObject, IAudioPlayback)
    protected
      OutputDeviceList: TAudioOutputDeviceList;
      MusicStream: TAudioPlaybackStream;
      function CreatePlaybackStream(): TAudioPlaybackStream; virtual; abstract;
      procedure ClearOutputDeviceList();
      function GetLatency(): double; virtual; abstract;

      // open sound or music stream (used by Open() and OpenSound())
      function OpenStream(const Filename: IPath): TAudioPlaybackStream;
      function OpenDecodeStream(const Filename: IPath): TAudioDecodeStream;
    public
      function GetName: string; virtual; abstract;

      function Open(const Filename: IPath): boolean; // true if succeed
      procedure Close;

      procedure Play;
      procedure Pause;
      procedure Stop;
      procedure FadeIn(Time: real; TargetVolume: single);

      procedure SetSyncSource(SyncSource: TSyncSource);

      procedure SetPosition(Time: real);
      function  GetPosition: real;

      function InitializePlayback: boolean; virtual; abstract;
      function FinalizePlayback: boolean; virtual;

      //function SetOutputDevice(Device: TAudioOutputDevice): boolean;
      function GetOutputDeviceList(): TAudioOutputDeviceList;

      procedure SetAppVolume(Volume: single); virtual; abstract;
      procedure SetVolume(Volume: single);
      procedure SetLoop(Enabled: boolean);

      procedure Rewind;
      function  Finished: boolean;
      function  Length: real;

      // Sounds
      function OpenSound(const Filename: IPath): TAudioPlaybackStream;
      procedure PlaySound(Stream: TAudioPlaybackStream);
      procedure StopSound(Stream: TAudioPlaybackStream);

      // Equalizer
      procedure GetFFTData(var Data: TFFTData);

      // Interface for Visualizer
      function GetPCMData(var Data: TPCMData): Cardinal;

      function CreateVoiceStream(Channel: integer; FormatInfo: TAudioFormatInfo): TAudioVoiceStream; virtual; abstract;
  end;


implementation

uses
  ULog,
  SysUtils;

{ TAudioPlaybackBase }

function TAudioPlaybackBase.FinalizePlayback: boolean;
begin
  FreeAndNil(MusicStream);
  ClearOutputDeviceList();
  Result := true;
end;

function TAudioPlaybackBase.Open(const Filename: IPath): boolean;
begin
  // free old MusicStream
  MusicStream.Free;

  MusicStream := OpenStream(Filename);
  if not assigned(MusicStream) then
  begin
    Result := false;
    Exit;
  end;

  //MusicStream.AddSoundEffect(TVoiceRemoval.Create());

  Result := true;
end;

procedure TAudioPlaybackBase.Close;
begin
  FreeAndNil(MusicStream);
end;

function TAudioPlaybackBase.OpenDecodeStream(const Filename: IPath): TAudioDecodeStream;
var
  i: integer;
begin
  for i := 0 to AudioDecoders.Count-1 do
  begin
    Result := IAudioDecoder(AudioDecoders[i]).Open(Filename);
    if (assigned(Result)) then
    begin
      Log.LogInfo('Using decoder ' + IAudioDecoder(AudioDecoders[i]).GetName() +
        ' for "' + Filename.ToNative + '"', 'TAudioPlaybackBase.OpenDecodeStream');
      Exit;
    end;
  end;
  Result := nil;
end;

procedure OnClosePlaybackStream(Stream: TAudioProcessingStream);
var
  PlaybackStream: TAudioPlaybackStream;
  SourceStream: TAudioSourceStream;
begin
  PlaybackStream := TAudioPlaybackStream(Stream);
  SourceStream := PlaybackStream.GetSourceStream();
  SourceStream.Free;
end;

function TAudioPlaybackBase.OpenStream(const Filename: IPath): TAudioPlaybackStream;
var
  PlaybackStream: TAudioPlaybackStream;
  DecodeStream: TAudioDecodeStream;
begin
  Result := nil;

  //Log.LogStatus('Loading Sound: "' + Filename + '"', 'TAudioPlayback_Bass.OpenStream');

  DecodeStream := OpenDecodeStream(Filename);
  if (not assigned(DecodeStream)) then
  begin
    Log.LogStatus('Could not open "' + Filename.ToNative + '"', 'TAudioPlayback_Bass.OpenStream');
    Exit;
  end;

  // create a matching playback-stream for the decoder
  PlaybackStream := CreatePlaybackStream();
  if (not PlaybackStream.Open(DecodeStream)) then
  begin
    FreeAndNil(PlaybackStream);
    FreeAndNil(DecodeStream);
    Exit;
  end;

  PlaybackStream.AddOnCloseHandler(OnClosePlaybackStream);

  Result := PlaybackStream;
end;

procedure TAudioPlaybackBase.Play;
begin
  if assigned(MusicStream) then
    MusicStream.Play();
end;

procedure TAudioPlaybackBase.Pause;
begin
  if assigned(MusicStream) then
    MusicStream.Pause();
end;

procedure TAudioPlaybackBase.Stop;
begin
  if assigned(MusicStream) then
    MusicStream.Stop();
end;

function TAudioPlaybackBase.Length: real;
begin
  if assigned(MusicStream) then
    Result := MusicStream.Length
  else
    Result := 0;
end;

function TAudioPlaybackBase.GetPosition: real;
begin
  if assigned(MusicStream) then
    Result := MusicStream.Position
  else
    Result := 0;
end;

procedure TAudioPlaybackBase.SetPosition(Time: real);
begin
  if assigned(MusicStream) then
    MusicStream.Position := Time;
end;

procedure TAudioPlaybackBase.SetSyncSource(SyncSource: TSyncSource);
begin
  if assigned(MusicStream) then
    MusicStream.SetSyncSource(SyncSource);
end;

procedure TAudioPlaybackBase.Rewind;
begin
  SetPosition(0);
end;

function TAudioPlaybackBase.Finished: boolean;
begin
  if assigned(MusicStream) then
    Result := (MusicStream.Status = ssStopped)
  else
    Result := true;
end;

procedure TAudioPlaybackBase.SetVolume(Volume: single);
begin
  if assigned(MusicStream) then
    MusicStream.Volume := Volume;
end;

procedure TAudioPlaybackBase.FadeIn(Time: real; TargetVolume: single);
begin
  if assigned(MusicStream) then
    MusicStream.FadeIn(Time, TargetVolume);
end;

procedure TAudioPlaybackBase.SetLoop(Enabled: boolean);
begin
  if assigned(MusicStream) then
    MusicStream.Loop := Enabled;
end;

// Equalizer
procedure TAudioPlaybackBase.GetFFTData(var data: TFFTData);
begin
  if assigned(MusicStream) then
    MusicStream.GetFFTData(data);
end;

{*
 * Copies interleaved PCM SInt16 stereo samples into data.
 * Returns the number of frames
 *}
function TAudioPlaybackBase.GetPCMData(var data: TPCMData): Cardinal;
begin
  if assigned(MusicStream) then
    Result := MusicStream.GetPCMData(data)
  else
    Result := 0;
end;

function TAudioPlaybackBase.OpenSound(const Filename: IPath): TAudioPlaybackStream;
begin
  Result := OpenStream(Filename);
end;

procedure TAudioPlaybackBase.PlaySound(stream: TAudioPlaybackStream);
begin
  if assigned(stream) then
    stream.Play();
end;

procedure TAudioPlaybackBase.StopSound(stream: TAudioPlaybackStream);
begin
  if assigned(stream) then
    stream.Stop();
end;

procedure TAudioPlaybackBase.ClearOutputDeviceList();
var
  DeviceIndex: integer;
begin
  for DeviceIndex := 0 to High(OutputDeviceList) do
    OutputDeviceList[DeviceIndex].Free();
  SetLength(OutputDeviceList, 0);
end;

function TAudioPlaybackBase.GetOutputDeviceList(): TAudioOutputDeviceList;
begin
  Result := OutputDeviceList;
end;

end.