1 |
/*************************************************************************** |
2 |
* * |
3 |
* LinuxSampler - modular, streaming capable sampler * |
4 |
* * |
5 |
* Copyright (C) 2003,2004 by Benno Senoner and Christian Schoenebeck * |
6 |
* Copyright (C) 2005-2008 Christian Schoenebeck * |
7 |
* Copyright (C) 2009-2011 Christian Schoenebeck and Grigor Iliev * |
8 |
* Copyright (C) 2012-2016 Christian Schoenebeck * |
9 |
* * |
10 |
* This program is free software; you can redistribute it and/or modify * |
11 |
* it under the terms of the GNU General Public License as published by * |
12 |
* the Free Software Foundation; either version 2 of the License, or * |
13 |
* (at your option) any later version. * |
14 |
* * |
15 |
* This program is distributed in the hope that it will be useful, * |
16 |
* but WITHOUT ANY WARRANTY; without even the implied warranty of * |
17 |
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * |
18 |
* GNU General Public License for more details. * |
19 |
* * |
20 |
* You should have received a copy of the GNU General Public License * |
21 |
* along with this program; if not, write to the Free Software * |
22 |
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, * |
23 |
* MA 02111-1307 USA * |
24 |
***************************************************************************/ |
25 |
|
26 |
#ifndef __LS_VOICEBASE_H__ |
27 |
#define __LS_VOICEBASE_H__ |
28 |
|
29 |
#include "AbstractVoice.h" |
30 |
|
31 |
namespace LinuxSampler { |
32 |
|
33 |
template <class EC /* Engine Channel */, class R /* Region */, class S /* Sample */, class D /* DiskThread */> |
34 |
class VoiceBase : public AbstractVoice { |
35 |
public: |
36 |
D* pDiskThread; ///< Pointer to the disk thread, to be able to order a disk stream and later to delete the stream again |
37 |
int RealSampleWordsLeftToRead; ///< Number of samples left to read, not including the silence added for the interpolator |
38 |
|
39 |
VoiceBase(SignalUnitRack* pRack = NULL): AbstractVoice(pRack) { |
40 |
pRegion = NULL; |
41 |
pDiskThread = NULL; |
42 |
} |
43 |
virtual ~VoiceBase() { } |
44 |
|
45 |
virtual R* GetRegion() { return pRegion; } |
46 |
|
47 |
virtual unsigned long GetSampleCacheSize() { |
48 |
return pSample->GetCache().Size; |
49 |
} |
50 |
|
51 |
/** |
52 |
* Initializes and triggers the voice, a disk stream will be launched if |
53 |
* needed. |
54 |
* |
55 |
* @param pEngineChannel - engine channel on which this voice was ordered |
56 |
* @param itNoteOnEvent - event that caused triggering of this voice |
57 |
* @param PitchBend - MIDI detune factor (-8192 ... +8191) |
58 |
* @param pRegion - points to the region which provides sample wave(s) and articulation data |
59 |
* @param VoiceType - type of this voice |
60 |
* @param iKeyGroup - a value > 0 defines a key group in which this voice is member of |
61 |
* @returns 0 on success, a value < 0 if the voice wasn't triggered |
62 |
* (either due to an error or e.g. because no region is |
63 |
* defined for the given key) |
64 |
*/ |
65 |
virtual int Trigger ( |
66 |
AbstractEngineChannel* pEngineChannel, |
67 |
Pool<Event>::Iterator& itNoteOnEvent, |
68 |
int PitchBend, |
69 |
R* pRegion, |
70 |
type_t VoiceType, |
71 |
int iKeyGroup |
72 |
) { |
73 |
this->pRegion = pRegion; |
74 |
this->pSample = pRegion->pSample; // sample won't change until the voice is finished |
75 |
|
76 |
return AbstractVoice::Trigger ( |
77 |
pEngineChannel, itNoteOnEvent, PitchBend, VoiceType, iKeyGroup |
78 |
); |
79 |
} |
80 |
|
81 |
virtual int OrderNewStream() { |
82 |
int res = pDiskThread->OrderNewStream ( |
83 |
&DiskStreamRef, pRegion, MaxRAMPos + GetRAMCacheOffset(), !RAMLoop |
84 |
); |
85 |
|
86 |
if (res < 0) { |
87 |
dmsg(1,("Disk stream order failed!\n")); |
88 |
KillImmediately(); |
89 |
return -1; |
90 |
} |
91 |
|
92 |
return 0; |
93 |
} |
94 |
|
95 |
/** The offset of the RAM cache from the sample start (in sample units). */ |
96 |
virtual int GetRAMCacheOffset() { return 0; } |
97 |
|
98 |
/** |
99 |
* Renders the audio data for this voice for the current audio fragment. |
100 |
* The sample input data can either come from RAM (cached sample or sample |
101 |
* part) or directly from disk. The output signal will be rendered by |
102 |
* resampling / interpolation. If this voice is a disk streaming voice and |
103 |
* the voice completely played back the cached RAM part of the sample, it |
104 |
* will automatically switch to disk playback for the next RenderAudio() |
105 |
* call. |
106 |
* |
107 |
* @param Samples - number of samples to be rendered in this audio fragment cycle |
108 |
*/ |
109 |
void Render(uint Samples) { |
110 |
// select default values for synthesis mode bits |
111 |
SYNTHESIS_MODE_SET_LOOP(SynthesisMode, false); |
112 |
|
113 |
switch (this->PlaybackState) { |
114 |
|
115 |
case Voice::playback_state_init: |
116 |
this->PlaybackState = Voice::playback_state_ram; // we always start playback from RAM cache and switch then to disk if needed |
117 |
// no break - continue with playback_state_ram |
118 |
|
119 |
case Voice::playback_state_ram: { |
120 |
if (RAMLoop) SYNTHESIS_MODE_SET_LOOP(SynthesisMode, true); // enable looping |
121 |
|
122 |
// render current fragment |
123 |
Synthesize(Samples, (sample_t*) pSample->GetCache().pStart, Delay); |
124 |
|
125 |
if (DiskVoice) { |
126 |
// check if we reached the allowed limit of the sample RAM cache |
127 |
if (finalSynthesisParameters.dPos > MaxRAMPos) { |
128 |
dmsg(5,("VoiceBase: switching to disk playback (Pos=%f)\n", finalSynthesisParameters.dPos)); |
129 |
this->PlaybackState = Voice::playback_state_disk; |
130 |
} |
131 |
} else if (finalSynthesisParameters.dPos >= pSample->GetCache().Size / SmplInfo.FrameSize) { |
132 |
this->PlaybackState = Voice::playback_state_end; |
133 |
} |
134 |
} |
135 |
break; |
136 |
|
137 |
case Voice::playback_state_disk: { |
138 |
if (!DiskStreamRef.pStream) { |
139 |
// check if the disk thread created our ordered disk stream in the meantime |
140 |
DiskStreamRef.pStream = pDiskThread->AskForCreatedStream(DiskStreamRef.OrderID); |
141 |
if (!DiskStreamRef.pStream) { |
142 |
std::cerr << "Disk stream not available in time!\n" << std::flush; |
143 |
KillImmediately(); |
144 |
return; |
145 |
} |
146 |
DiskStreamRef.pStream->IncrementReadPos(uint( |
147 |
SmplInfo.ChannelCount * (int(finalSynthesisParameters.dPos) - MaxRAMPos) |
148 |
)); |
149 |
finalSynthesisParameters.dPos -= int(finalSynthesisParameters.dPos); |
150 |
RealSampleWordsLeftToRead = -1; // -1 means no silence has been added yet |
151 |
} |
152 |
|
153 |
const int sampleWordsLeftToRead = DiskStreamRef.pStream->GetReadSpace(); |
154 |
|
155 |
// add silence sample at the end if we reached the end of the stream (for the interpolator) |
156 |
if (DiskStreamRef.State == Stream::state_end) { |
157 |
const int maxSampleWordsPerCycle = (GetEngine()->MaxSamplesPerCycle << CONFIG_MAX_PITCH) * SmplInfo.ChannelCount + 6; // +6 for the interpolator algorithm |
158 |
if (sampleWordsLeftToRead <= maxSampleWordsPerCycle) { |
159 |
// remember how many sample words there are before any silence has been added |
160 |
if (RealSampleWordsLeftToRead < 0) RealSampleWordsLeftToRead = sampleWordsLeftToRead; |
161 |
DiskStreamRef.pStream->WriteSilence(maxSampleWordsPerCycle - sampleWordsLeftToRead); |
162 |
} |
163 |
} |
164 |
|
165 |
sample_t* ptr = (sample_t*)DiskStreamRef.pStream->GetReadPtr(); // get the current read_ptr within the ringbuffer where we read the samples from |
166 |
|
167 |
// render current audio fragment |
168 |
Synthesize(Samples, ptr, Delay); |
169 |
|
170 |
const int iPos = (int) finalSynthesisParameters.dPos; |
171 |
const int readSampleWords = iPos * SmplInfo.ChannelCount; // amount of sample words actually been read |
172 |
DiskStreamRef.pStream->IncrementReadPos(readSampleWords); |
173 |
finalSynthesisParameters.dPos -= iPos; // just keep fractional part of playback position |
174 |
|
175 |
// change state of voice to 'end' if we really reached the end of the sample data |
176 |
if (RealSampleWordsLeftToRead >= 0) { |
177 |
RealSampleWordsLeftToRead -= readSampleWords; |
178 |
if (RealSampleWordsLeftToRead <= 0) this->PlaybackState = Voice::playback_state_end; |
179 |
} |
180 |
} |
181 |
break; |
182 |
|
183 |
case Voice::playback_state_end: |
184 |
std::cerr << "VoiceBase::Render(): entered with playback_state_end, this is a bug!\n" << std::flush; |
185 |
break; |
186 |
} |
187 |
|
188 |
// Reset delay |
189 |
Delay = 0; |
190 |
|
191 |
itTriggerEvent = Pool<Event>::Iterator(); |
192 |
|
193 |
// If sample stream or release stage finished, kill the voice |
194 |
if (PlaybackState == Voice::playback_state_end || EG1Finished()) { |
195 |
KillImmediately(); |
196 |
} |
197 |
} |
198 |
|
199 |
/** |
200 |
* Immediately kill the voice. This method should not be used to kill |
201 |
* a normal, active voice, because it doesn't take care of things like |
202 |
* fading down the volume level to avoid clicks and regular processing |
203 |
* until the kill event actually occured! |
204 |
* |
205 |
* If it's necessary to know when the voice's disk stream was actually |
206 |
* deleted, then one can set the optional @a bRequestNotification |
207 |
* parameter and this method will then return the handle of the disk |
208 |
* stream (unique identifier) and one can use this handle to poll the |
209 |
* disk thread if this stream has been deleted. In any case this method |
210 |
* will return immediately and will not block until the stream actually |
211 |
* was deleted. |
212 |
* |
213 |
* @param bRequestNotification - (optional) whether the disk thread shall |
214 |
* provide a notification once it deleted |
215 |
* the respective disk stream |
216 |
* (default=false) |
217 |
* @returns handle to the voice's disk stream or @c Stream::INVALID_HANDLE |
218 |
* if the voice did not use a disk stream at all |
219 |
* @see Kill() |
220 |
*/ |
221 |
Stream::Handle KillImmediately(bool bRequestNotification = false) { |
222 |
Stream::Handle hStream = Stream::INVALID_HANDLE; |
223 |
if (DiskVoice && DiskStreamRef.State != Stream::state_unused) { |
224 |
pDiskThread->OrderDeletionOfStream(&DiskStreamRef, bRequestNotification); |
225 |
hStream = DiskStreamRef.hStream; |
226 |
} |
227 |
Reset(); |
228 |
return hStream; |
229 |
} |
230 |
|
231 |
protected: |
232 |
S* pSample; ///< Pointer to the sample to be played back |
233 |
R* pRegion; ///< Pointer to the articulation information of current region of this voice |
234 |
|
235 |
virtual MidiKeyBase* GetMidiKeyInfo(int MIDIKey) { |
236 |
EC* pChannel = static_cast<EC*>(pEngineChannel); |
237 |
return &pChannel->pMIDIKeyInfo[MIDIKey]; |
238 |
} |
239 |
|
240 |
virtual unsigned long GetNoteOnTime(int MIDIKey) { |
241 |
EC* pChannel = static_cast<EC*>(pEngineChannel); |
242 |
return pChannel->pMIDIKeyInfo[MIDIKey].NoteOnTime; |
243 |
} |
244 |
|
245 |
void GetFirstEventOnKey(uint8_t MIDIKey, RTList<Event>::Iterator& itEvent) { |
246 |
EC* pChannel = static_cast<EC*>(pEngineChannel); |
247 |
itEvent = pChannel->pMIDIKeyInfo[MIDIKey].pEvents->first(); |
248 |
} |
249 |
}; |
250 |
} // namespace LinuxSampler |
251 |
|
252 |
#endif /* __LS_VOICEBASE_H__ */ |
253 |
|