android/opensl_io.h

   1 /*
   2 opensl_io.c:
   3 Android OpenSL input/output module header
   4 Copyright (c) 2012, Victor Lazzarini
   5 All rights reserved.
   6
   7 Redistribution and use in source and binary forms, with or without
   8 modification, are permitted provided that the following conditions are met:
   9     * Redistributions of source code must retain the above copyright
  10       notice, this list of conditions and the following disclaimer.
  11     * Redistributions in binary form must reproduce the above copyright
  12       notice, this list of conditions and the following disclaimer in the
  13       documentation and/or other materials provided with the distribution.
  14     * Neither the name of the <organization> nor the
  15       names of its contributors may be used to endorse or promote products
  16       derived from this software without specific prior written permission.
  17
  18 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
  19 ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  20 WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  21 DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY
  22 DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  23 (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  24 LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
  25 ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  26 (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  27 SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  28 */
  29
  30 #ifndef OPENSL_IO
  31 #define OPENSL_IO
  32
  33 #include <SLES/OpenSLES.h>
  34 #include <SLES/OpenSLES_Android.h>
  35 #include <pthread.h>
  36 #include <stdlib.h>
  37
  38 typedef struct threadLock_{
  39   pthread_mutex_t m;
  40   pthread_cond_t  c;
  41   unsigned char   s;
  42 } threadLock;
  43
  44 #ifdef __cplusplus
  45 extern "C" {
  46 #endif
  47
  48 typedef struct opensl_stream {
  49
  50   // engine interfaces
  51   SLObjectItf engineObject;
  52   SLEngineItf engineEngine;
  53
  54   // output mix interfaces
  55   SLObjectItf outputMixObject;
  56
  57   // buffer queue player interfaces
  58   SLObjectItf bqPlayerObject;
  59   SLPlayItf bqPlayerPlay;
  60   SLAndroidSimpleBufferQueueItf bqPlayerBufferQueue;
  61   SLEffectSendItf bqPlayerEffectSend;
  62
  63   // recorder interfaces
  64   SLObjectItf recorderObject;
  65   SLRecordItf recorderRecord;
  66   SLAndroidSimpleBufferQueueItf recorderBufferQueue;
  67
  68   // buffer indexes
  69   int currentInputIndex;
  70   int currentOutputIndex;
  71
  72   // current buffer half (0, 1)
  73   int currentOutputBuffer;
  74   int currentInputBuffer;
  75
  76   // buffers
  77   short *outputBuffer[2];
  78   short *inputBuffer[2];
  79
  80   // size of buffers
  81   int outBufSamples;
  82   int inBufSamples;
  83
  84   // locks
  85   void*  inlock;
  86   void*  outlock;
  87
  88   double time;
  89   int inchannels;
  90   int outchannels;
  91   int   sr;
  92
  93 } OPENSL_STREAM;
  94
  95   /*
  96   Open the audio device with a given sampling rate (sr), input and output channels and IO buffer size
  97   in frames. Returns a handle to the OpenSL stream
  98   */
  99   OPENSL_STREAM* android_OpenAudioDevice(int sr, int inchannels, int outchannels, int bufferframes);
 100   /*
 101   Close the audio device
 102   */
 103   void android_CloseAudioDevice(OPENSL_STREAM *p);
 104   /*
 105   Read a buffer from the OpenSL stream *p, of size samples. Returns the number of samples read.
 106   */
 107   int android_AudioIn(OPENSL_STREAM *p, float *buffer,int size);
 108   /*
 109   Write a buffer to the OpenSL stream *p, of size samples. Returns the number of samples written.
 110   */
 111   int android_AudioOut(OPENSL_STREAM *p, float *buffer,int size);
 112   /*
 113   Get the current IO block time in seconds
 114   */
 115   double android_GetTimestamp(OPENSL_STREAM *p);
 116
 117 #ifdef __cplusplus
 118 };
 119 #endif
 120
 121 #endif // #ifndef OPENSL_IO