ToneGenerator.h revision 681be0398a06da7e24db4ed934a92af64d1409b1 
1/*
2 * Copyright (C) 2008 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#ifndef ANDROID_TONEGENERATOR_H_
18#define ANDROID_TONEGENERATOR_H_
19
20#include <utils/RefBase.h>
21#include <utils/KeyedVector.h>
22#include <utils/threads.h>
23#include <media/AudioSystem.h>
24#include <media/AudioTrack.h>
25
26namespace android {
27
28class ToneGenerator {
29public:
30
31    // List of all available tones
32    // This enum must be kept consistant with constants in ToneGenerator JAVA class
33    enum tone_type {
34        // DTMF tones  ITU-T Recommendation Q.23
35        TONE_DTMF_0 = 0,  // 0 key: 1336Hz, 941Hz
36        TONE_DTMF_1,  // 1 key: 1209Hz, 697Hz
37        TONE_DTMF_2,  // 2 key: 1336Hz, 697Hz
38        TONE_DTMF_3,  // 3 key: 1477Hz, 697Hz
39        TONE_DTMF_4,  // 4 key: 1209Hz, 770Hz
40        TONE_DTMF_5,  // 5 key: 1336Hz, 770Hz
41        TONE_DTMF_6,  // 6 key: 1477Hz, 770Hz
42        TONE_DTMF_7,  // 7 key: 1209Hz, 852Hz
43        TONE_DTMF_8,  // 8 key: 1336Hz, 852Hz
44        TONE_DTMF_9,  // 9 key: 1477Hz, 852Hz
45        TONE_DTMF_S,  // * key: 1209Hz, 941Hz
46        TONE_DTMF_P,  // # key: 1477Hz, 941Hz
47        TONE_DTMF_A,  // A key: 1633Hz, 697Hz
48        TONE_DTMF_B,  // B key: 1633Hz, 770Hz
49        TONE_DTMF_C,  // C key: 1633Hz, 852Hz
50        TONE_DTMF_D,  // D key: 1633Hz, 941Hz
51        // Call supervisory tones:  3GPP TS 22.001 (CEPT)
52        TONE_SUP_DIAL,  // Dial tone: CEPT: 425Hz, continuous
53        FIRST_SUP_TONE = TONE_SUP_DIAL,
54        TONE_SUP_BUSY,  // Busy tone, CEPT: 425Hz, 500ms ON, 500ms OFF...
55        TONE_SUP_CONGESTION,  // Congestion tone CEPT, JAPAN: 425Hz, 200ms ON, 200ms OFF...
56        TONE_SUP_RADIO_ACK,  // Radio path acknowlegment, CEPT, ANSI: 425Hz, 200ms ON
57        TONE_SUP_RADIO_NOTAVAIL,  // Radio path not available: 425Hz, 200ms ON, 200 OFF 3 bursts
58        TONE_SUP_ERROR,  // Error/Special info:  950Hz+1400Hz+1800Hz, 330ms ON, 1s OFF...
59        TONE_SUP_CALL_WAITING,  // Call Waiting CEPT,JAPAN:  425Hz, 200ms ON, 600ms OFF, 200ms ON, 3s OFF...
60        TONE_SUP_RINGTONE,  // Ring Tone CEPT, JAPAN:  425Hz, 1s ON, 4s OFF...
61        LAST_SUP_TONE = TONE_SUP_RINGTONE,
62        // Proprietary tones:  3GPP TS 31.111
63        TONE_PROP_BEEP,  // General beep: 400Hz+1200Hz, 35ms ON
64        TONE_PROP_ACK,  // Positive Acknowlgement: 1200Hz, 100ms ON, 100ms OFF 2 bursts
65        TONE_PROP_NACK,  // Negative Acknowlgement: 300Hz+400Hz+500Hz, 400ms ON
66        TONE_PROP_PROMPT,  // Prompt tone: 400Hz+1200Hz, 200ms ON
67        TONE_PROP_BEEP2,  // General double beep: 400Hz+1200Hz, 35ms ON, 200ms OFF, 35ms on
68        // Additional call supervisory tones: specified by IS-95 only
69        TONE_SUP_INTERCEPT, // Intercept tone: alternating 440 Hz and 620 Hz tones, each on for 250 ms.
70        TONE_SUP_INTERCEPT_ABBREV, // Abbreviated intercept: intercept tone limited to 4 seconds
71        TONE_SUP_CONGESTION_ABBREV, // Abbreviated congestion: congestion tone limited to 4 seconds
72        TONE_SUP_CONFIRM, // Confirm tone: a 350 Hz tone added to a 440 Hz tone repeated 3 times in a 100 ms on, 100 ms off cycle.
73        TONE_SUP_PIP, // Pip tone: four bursts of 480 Hz tone (0.1 s on, 0.1 s off).
74
75        // CDMA Tones
76        TONE_CDMA_DIAL_TONE_LITE,
77        TONE_CDMA_NETWORK_USA_RINGBACK,
78        TONE_CDMA_INTERCEPT,
79        TONE_CDMA_ABBR_INTERCEPT,
80        TONE_CDMA_REORDER,
81        TONE_CDMA_ABBR_REORDER,
82        TONE_CDMA_NETWORK_BUSY,
83        TONE_CDMA_CONFIRM,
84        TONE_CDMA_ANSWER,
85        TONE_CDMA_NETWORK_CALLWAITING,
86        TONE_CDMA_PIP,
87
88        // ISDN
89        TONE_CDMA_CALL_SIGNAL_ISDN_NORMAL,  // ISDN Alert Normal
90        TONE_CDMA_CALL_SIGNAL_ISDN_INTERGROUP, // ISDN Intergroup
91        TONE_CDMA_CALL_SIGNAL_ISDN_SP_PRI, // ISDN SP PRI
92        TONE_CDMA_CALL_SIGNAL_ISDN_PAT3,  // ISDN Alert PAT3
93        TONE_CDMA_CALL_SIGNAL_ISDN_PING_RING, // ISDN Alert PING RING
94        TONE_CDMA_CALL_SIGNAL_ISDN_PAT5,  // ISDN Alert PAT5
95        TONE_CDMA_CALL_SIGNAL_ISDN_PAT6,  // ISDN Alert PAT6
96        TONE_CDMA_CALL_SIGNAL_ISDN_PAT7,  // ISDN Alert PAT7
97        // ISDN end
98
99        // IS54
100        TONE_CDMA_HIGH_L,  // IS54 High Pitch Long
101        TONE_CDMA_MED_L, // IS54 Med Pitch Long
102        TONE_CDMA_LOW_L, // IS54 Low Pitch Long
103        TONE_CDMA_HIGH_SS, // IS54 High Pitch Short Short
104        TONE_CDMA_MED_SS, // IS54 Medium Pitch Short Short
105        TONE_CDMA_LOW_SS, // IS54 Low Pitch Short Short
106        TONE_CDMA_HIGH_SSL, // IS54 High Pitch Short Short Long
107        TONE_CDMA_MED_SSL, // IS54 Medium  Pitch Short Short Long
108        TONE_CDMA_LOW_SSL, // IS54 Low  Pitch Short Short Long
109        TONE_CDMA_HIGH_SS_2, // IS54 High Pitch Short Short 2
110        TONE_CDMA_MED_SS_2, // IS54 Med Pitch Short Short 2
111        TONE_CDMA_LOW_SS_2, // IS54 Low  Pitch Short Short 2
112        TONE_CDMA_HIGH_SLS, // IS54 High Pitch Short Long Short
113        TONE_CDMA_MED_SLS, // IS54 Med Pitch Short Long Short
114        TONE_CDMA_LOW_SLS, // IS54 Low Pitch Short Long Short
115        TONE_CDMA_HIGH_S_X4, // IS54 High Pitch Short Short Short Short
116        TONE_CDMA_MED_S_X4, // IS54 Med Pitch Short Short Short Short
117        TONE_CDMA_LOW_S_X4, // IS54 Low Pitch Short Short Short Short
118        TONE_CDMA_HIGH_PBX_L, // PBX High Pitch Long
119        TONE_CDMA_MED_PBX_L, // PBX Med Pitch Long
120        TONE_CDMA_LOW_PBX_L, // PBX Low  Pitch Long
121        TONE_CDMA_HIGH_PBX_SS, // PBX High Short Short
122        TONE_CDMA_MED_PBX_SS, // PBX Med Short Short
123        TONE_CDMA_LOW_PBX_SS, // PBX Low  Short Short
124        TONE_CDMA_HIGH_PBX_SSL, // PBX High Short Short Long
125        TONE_CDMA_MED_PBX_SSL, // PBX Med Short Short Long
126        TONE_CDMA_LOW_PBX_SSL,  // PBX Low Short Short Long
127        TONE_CDMA_HIGH_PBX_SLS, // PBX High  SLS
128        TONE_CDMA_MED_PBX_SLS,  // PBX Med SLS
129        TONE_CDMA_LOW_PBX_SLS, // PBX Low SLS
130        TONE_CDMA_HIGH_PBX_S_X4, // PBX High SSSS
131        TONE_CDMA_MED_PBX_S_X4, // PBX Med SSSS
132        TONE_CDMA_LOW_PBX_S_X4, // PBX LOW SSSS
133        //IS54 end
134        // proprietary
135        TONE_CDMA_ALERT_NETWORK_LITE,
136        TONE_CDMA_ALERT_AUTOREDIAL_LITE,
137        TONE_CDMA_ONE_MIN_BEEP,
138        TONE_CDMA_KEYPAD_VOLUME_KEY_LITE,
139        TONE_CDMA_PRESSHOLDKEY_LITE,
140        TONE_CDMA_ALERT_INCALL_LITE,
141        TONE_CDMA_EMERGENCY_RINGBACK,
142        TONE_CDMA_ALERT_CALL_GUARD,
143        TONE_CDMA_SOFT_ERROR_LITE,
144        TONE_CDMA_CALLDROP_LITE,
145        // proprietary end
146        TONE_CDMA_NETWORK_BUSY_ONE_SHOT,
147        TONE_CDMA_ABBR_ALERT,
148        TONE_CDMA_SIGNAL_OFF,
149        //CDMA end
150        NUM_TONES,
151        NUM_SUP_TONES = LAST_SUP_TONE-FIRST_SUP_TONE+1
152    };
153
154    ToneGenerator(audio_stream_type_t streamType, float volume, bool threadCanCallJava = false);
155    ~ToneGenerator();
156
157    bool startTone(tone_type toneType, int durationMs = -1);
158    void stopTone();
159
160    bool isInited() { return (mState == TONE_IDLE)?false:true;}
161
162    // returns the audio session this ToneGenerator belongs to or 0 if an error occured.
163    int getSessionId() { return (mpAudioTrack == NULL) ? 0 : mpAudioTrack->getSessionId(); }
164
165private:
166
167    enum tone_state {
168        TONE_IDLE,  // ToneGenerator is being initialized or initialization failed
169        TONE_INIT,  // ToneGenerator has been successfully initialized and is not playing
170        TONE_STARTING,  // ToneGenerator is starting playing
171        TONE_PLAYING,  // ToneGenerator is playing
172        TONE_STOPPING,  // ToneGenerator is stoping
173        TONE_STOPPED,  // ToneGenerator is stopped: the AudioTrack will be stopped
174        TONE_RESTARTING  // A start request was received in active state (playing or stopping)
175    };
176
177
178    // Region specific tones.
179    // These supervisory tones are different depending on the region (USA/CANADA, JAPAN, rest of the world).
180    // When a tone in the range [FIRST_SUP_TONE, LAST_SUP_TONE] is requested, the region is determined
181    // from system property gsm.operator.iso-country and the proper tone descriptor is selected with the
182    // help of sToneMappingTable[]
183    enum regional_tone_type {
184        // ANSI supervisory tones
185        TONE_ANSI_DIAL = NUM_TONES, // Dial tone: a continuous 350 Hz + 440 Hz tone.
186        TONE_ANSI_BUSY,             // Busy tone on:  a 480 Hz + 620 Hz tone repeated in a 500 ms on, 500 ms off cycle.
187        TONE_ANSI_CONGESTION,       // Network congestion (reorder) tone on:  a 480 Hz + 620 Hz tone repeated in a 250 ms on, 250 ms off cycle.
188        TONE_ANSI_CALL_WAITING,     // Call waiting tone on: 440 Hz, on for 300 ms, 9,7 s off followed by
189                                    // (440 Hz, on for 100 ms off for 100 ms, on for 100 ms, 9,7s off and repeated as necessary).
190        TONE_ANSI_RINGTONE,         // Ring Tone:  a 440 Hz + 480 Hz tone repeated in a 2 s on, 4 s off pattern.
191        // JAPAN Supervisory tones
192        TONE_JAPAN_DIAL,            // Dial tone: 400Hz, continuous
193        TONE_JAPAN_BUSY,            // Busy tone: 400Hz, 500ms ON, 500ms OFF...
194        TONE_JAPAN_RADIO_ACK,       // Radio path acknowlegment: 400Hz, 1s ON, 2s OFF...
195        NUM_ALTERNATE_TONES
196    };
197
198    enum region {
199        ANSI,
200        JAPAN,
201        CEPT,
202        NUM_REGIONS
203    };
204
205    static const unsigned char sToneMappingTable[NUM_REGIONS-1][NUM_SUP_TONES];
206
207    static const unsigned int TONEGEN_MAX_WAVES = 3;     // Maximun number of sine waves in a tone segment
208    static const unsigned int TONEGEN_MAX_SEGMENTS = 12;  // Maximun number of segments in a tone descriptor
209    static const unsigned int TONEGEN_INF = 0xFFFFFFFF;  // Represents infinite time duration
210    static const float TONEGEN_GAIN = 0.9;  // Default gain passed to  WaveGenerator().
211
212    // ToneDescriptor class contains all parameters needed to generate a tone:
213    //    - The array waveFreq[]:
214    //         1 for static tone descriptors: contains the frequencies of all individual waves making the multi-tone.
215    //         2 for active tone descritors: contains the indexes of the WaveGenerator objects in mWaveGens
216    //        The number of sine waves varies from 1 to TONEGEN_MAX_WAVES.
217    //        The first null value indicates that no more waves are needed.
218    //    - The array segments[] is used to generate the tone pulses. A segment is a period of time
219    //        during which the tone is ON or OFF.    Segments with even index (starting from 0)
220    //        correspond to tone ON state and segments with odd index to OFF state.
221    //        The data stored in segments[] is the duration of the corresponding period in ms.
222    //        The first segment encountered with a 0 duration    indicates that no more segment follows.
223    //    - loopCnt - Number of times to repeat a sequence of seqments after playing this
224    //    - loopIndx - The segment index to go back and play is loopcnt > 0
225    //    - repeatCnt indicates the number of times the sequence described by segments[] array must be repeated.
226    //        When the tone generator encounters the first 0 duration segment, it will compare repeatCnt to mCurCount.
227    //        If mCurCount > repeatCnt, the tone is stopped automatically. Otherwise, tone sequence will be
228    //        restarted from segment repeatSegment.
229    //    - repeatSegment number of the first repeated segment when repeatCnt is not null
230
231    class ToneSegment {
232    public:
233        unsigned int duration;
234        unsigned short waveFreq[TONEGEN_MAX_WAVES+1];
235        unsigned short loopCnt;
236        unsigned short loopIndx;
237    };
238
239    class ToneDescriptor {
240    public:
241        ToneSegment segments[TONEGEN_MAX_SEGMENTS+1];
242        unsigned long repeatCnt;
243        unsigned long repeatSegment;
244    };
245
246    static const ToneDescriptor sToneDescriptors[];
247
248    bool mThreadCanCallJava;
249    unsigned int mTotalSmp;  // Total number of audio samples played (gives current time)
250    unsigned int mNextSegSmp;  // Position of next segment transition expressed in samples
251    // NOTE: because mTotalSmp, mNextSegSmp are stored on 32 bit, current design will operate properly
252    // only if tone duration is less than about 27 Hours(@44100Hz sampling rate). If this time is exceeded,
253    // no crash will occur but tone sequence will show a glitch.
254    unsigned int mMaxSmp;  // Maximum number of audio samples played (maximun tone duration)
255    int mDurationMs;  // Maximum tone duration in ms
256
257    unsigned short mCurSegment;  // Current segment index in ToneDescriptor segments[]
258    unsigned short mCurCount;  // Current sequence repeat count
259    volatile unsigned short mState;  // ToneGenerator state (tone_state)
260    unsigned short mRegion;
261    const ToneDescriptor *mpToneDesc;  // pointer to active tone descriptor
262    const ToneDescriptor *mpNewToneDesc;  // pointer to next active tone descriptor
263
264    unsigned short mLoopCounter; // Current tone loopback count
265
266    uint32_t mSamplingRate;  // AudioFlinger Sampling rate
267    AudioTrack *mpAudioTrack;  // Pointer to audio track used for playback
268    Mutex mLock;  // Mutex to control concurent access to ToneGenerator object from audio callback and application API
269    Mutex mCbkCondLock; // Mutex associated to mWaitCbkCond
270    Condition mWaitCbkCond; // condition enabling interface to wait for audio callback completion after a change is requested
271    float mVolume;  // Volume applied to audio track
272    audio_stream_type_t mStreamType; // Audio stream used for output
273    unsigned int mProcessSize;  // Size of audio blocks generated at a time by audioCallback() (in PCM frames).
274    struct timespec mStartTime; // tone start time: needed to guaranty actual tone duration
275
276    bool initAudioTrack();
277    static void audioCallback(int event, void* user, void *info);
278    bool prepareWave();
279    unsigned int numWaves(unsigned int segmentIdx);
280    void clearWaveGens();
281    tone_type getToneForRegion(tone_type toneType);
282
283    // WaveGenerator generates a single sine wave
284    class WaveGenerator {
285    public:
286        enum gen_command {
287            WAVEGEN_START,  // Start/restart wave from phase 0
288            WAVEGEN_CONT,  // Continue wave from current phase
289            WAVEGEN_STOP  // Stop wave on zero crossing
290        };
291
292        WaveGenerator(unsigned short samplingRate, unsigned short frequency,
293                float volume);
294        ~WaveGenerator();
295
296        void getSamples(short *outBuffer, unsigned int count,
297                unsigned int command);
298
299    private:
300        static const short GEN_AMP = 32000;  // amplitude of generator
301        static const short S_Q14 = 14;  // shift for Q14
302        static const short S_Q15 = 15;  // shift for Q15
303
304        short mA1_Q14;  // Q14 coefficient
305        // delay line of full amplitude generator
306        short mS1, mS2;  // delay line S2 oldest
307        short mS2_0;  // saved value for reinitialisation
308        short mAmplitude_Q15;  // Q15 amplitude
309    };
310
311    KeyedVector<unsigned short, WaveGenerator *> mWaveGens;  // list of active wave generators.
312};
313
314}
315;  // namespace android
316
317#endif /*ANDROID_TONEGENERATOR_H_*/
318