1 /* 2 * Copyright (C) 2010 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 /** \file OutputMixExt.h OutputMixExt interface */ 18 19 #ifdef __cplusplus 20 extern "C" { 21 #endif 22 extern const SLInterfaceID SL_IID_OUTPUTMIXEXT; 23 #ifdef __cplusplus 24 } 25 #endif 26 27 typedef const struct SLOutputMixExtItf_ * const * SLOutputMixExtItf; 28 29 /** \brief v-table for IOutputMixExt */ 30 31 struct SLOutputMixExtItf_ { 32 void (*FillBuffer)(SLOutputMixExtItf self, void *pBuffer, SLuint32 size); 33 }; 34 35 /** \brief Track describes each PCM input source to OutputMix */ 36 37 typedef struct { 38 struct BufferQueue_interface *mBufferQueue; 39 CAudioPlayer *mAudioPlayer; ///< Mixer examines this track if non-NULL 40 const void *mReader; ///< Pointer to next frame in BufferHeader.mBuffer 41 SLuint32 mAvail; ///< Number of available bytes in the current buffer 42 float mGains[STEREO_CHANNELS]; ///< Copied from CAudioPlayer::mGains 43 SLuint32 mFramesMixed; ///< Number of sample frames mixed from track; reset periodically 44 } Track; 45 46 extern SLresult IOutputMixExt_checkAudioPlayerSourceSink(CAudioPlayer *thiz); 47 extern void audioPlayerGainUpdate(CAudioPlayer *thiz); 48 extern void IOutputMixExt_FillBuffer(SLOutputMixExtItf self, void *pBuffer, SLuint32 size); 49