IOutputMixExt.cpp revision 8c065779232fdd89abace68d2fc7bea786a010d7
1b7154f2324c8ae44b820c07c69aaa80a4bb9e418Glenn Kasten/* 2b7154f2324c8ae44b820c07c69aaa80a4bb9e418Glenn Kasten * Copyright (C) 2010 The Android Open Source Project 3b7154f2324c8ae44b820c07c69aaa80a4bb9e418Glenn Kasten * 4b7154f2324c8ae44b820c07c69aaa80a4bb9e418Glenn Kasten * Licensed under the Apache License, Version 2.0 (the "License"); 5b7154f2324c8ae44b820c07c69aaa80a4bb9e418Glenn Kasten * you may not use this file except in compliance with the License. 6b7154f2324c8ae44b820c07c69aaa80a4bb9e418Glenn Kasten * You may obtain a copy of the License at 7b7154f2324c8ae44b820c07c69aaa80a4bb9e418Glenn Kasten * 8b7154f2324c8ae44b820c07c69aaa80a4bb9e418Glenn Kasten * http://www.apache.org/licenses/LICENSE-2.0 9b7154f2324c8ae44b820c07c69aaa80a4bb9e418Glenn Kasten * 10b7154f2324c8ae44b820c07c69aaa80a4bb9e418Glenn Kasten * Unless required by applicable law or agreed to in writing, software 11b7154f2324c8ae44b820c07c69aaa80a4bb9e418Glenn Kasten * distributed under the License is distributed on an "AS IS" BASIS, 12b7154f2324c8ae44b820c07c69aaa80a4bb9e418Glenn Kasten * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13b7154f2324c8ae44b820c07c69aaa80a4bb9e418Glenn Kasten * See the License for the specific language governing permissions and 14b7154f2324c8ae44b820c07c69aaa80a4bb9e418Glenn Kasten * limitations under the License. 15b7154f2324c8ae44b820c07c69aaa80a4bb9e418Glenn Kasten */ 16b7154f2324c8ae44b820c07c69aaa80a4bb9e418Glenn Kasten 17b7154f2324c8ae44b820c07c69aaa80a4bb9e418Glenn Kasten/* OutputMixExt implementation */ 18b7154f2324c8ae44b820c07c69aaa80a4bb9e418Glenn Kasten 19b7154f2324c8ae44b820c07c69aaa80a4bb9e418Glenn Kasten#include "sles_allinclusive.h" 20e5bf0d2c9531a7064eb3ddcafaf93ac1b0974037Glenn Kasten#include <math.h> 21b7154f2324c8ae44b820c07c69aaa80a4bb9e418Glenn Kasten 22b7154f2324c8ae44b820c07c69aaa80a4bb9e418Glenn Kasten#ifdef USE_OUTPUTMIXEXT 23b7154f2324c8ae44b820c07c69aaa80a4bb9e418Glenn Kasten 24b7154f2324c8ae44b820c07c69aaa80a4bb9e418Glenn Kasten// Used by SDL but not specific to or dependent on SDL 25b7154f2324c8ae44b820c07c69aaa80a4bb9e418Glenn Kasten 26343c522ebf4f9c321eef8c3b3b2945f1c1cb8846Glenn Kasten/** \brief Summary of the gain, as an optimization for the mixer */ 27e5bf0d2c9531a7064eb3ddcafaf93ac1b0974037Glenn Kasten 2840d1c40832a448e23d0bb37512aee53222575c2eGlenn Kastentypedef enum { 29e5bf0d2c9531a7064eb3ddcafaf93ac1b0974037Glenn Kasten GAIN_MUTE = 0, // mValue == 0.0f within epsilon 30e5bf0d2c9531a7064eb3ddcafaf93ac1b0974037Glenn Kasten GAIN_UNITY = 1, // mValue == 1.0f within epsilon 31e5bf0d2c9531a7064eb3ddcafaf93ac1b0974037Glenn Kasten GAIN_OTHER = 2 // 0.0f < mValue < 1.0f 3240d1c40832a448e23d0bb37512aee53222575c2eGlenn Kasten} Summary; 3340d1c40832a448e23d0bb37512aee53222575c2eGlenn Kasten 34ed46c29d6a09112dbbf584c82953f63289596fd6Glenn Kasten 35343c522ebf4f9c321eef8c3b3b2945f1c1cb8846Glenn Kasten/** \brief Check whether a track has any data for us to read */ 364b65ef9efdf5aba01bea89d8cdd64f500560a28dGlenn Kasten 37369f3138f19f7102bf0f98b890ab84c8df633a93Glenn Kastenstatic SLboolean track_check(Track *track) 384b65ef9efdf5aba01bea89d8cdd64f500560a28dGlenn Kasten{ 394b65ef9efdf5aba01bea89d8cdd64f500560a28dGlenn Kasten SLboolean trackHasData = SL_BOOLEAN_FALSE; 404b65ef9efdf5aba01bea89d8cdd64f500560a28dGlenn Kasten 414b65ef9efdf5aba01bea89d8cdd64f500560a28dGlenn Kasten CAudioPlayer *audioPlayer = track->mAudioPlayer; 424b65ef9efdf5aba01bea89d8cdd64f500560a28dGlenn Kasten if (NULL != audioPlayer) { 434b65ef9efdf5aba01bea89d8cdd64f500560a28dGlenn Kasten 444b65ef9efdf5aba01bea89d8cdd64f500560a28dGlenn Kasten // track is initialized 454b65ef9efdf5aba01bea89d8cdd64f500560a28dGlenn Kasten 464b65ef9efdf5aba01bea89d8cdd64f500560a28dGlenn Kasten object_lock_exclusive(&audioPlayer->mObject); 474b65ef9efdf5aba01bea89d8cdd64f500560a28dGlenn Kasten 488c065779232fdd89abace68d2fc7bea786a010d7Glenn Kasten SLuint32 framesMixed = track->mFramesMixed; 498c065779232fdd89abace68d2fc7bea786a010d7Glenn Kasten if (0 != framesMixed) { 508c065779232fdd89abace68d2fc7bea786a010d7Glenn Kasten track->mFramesMixed = 0; 518c065779232fdd89abace68d2fc7bea786a010d7Glenn Kasten audioPlayer->mPlay.mFramesSinceLastSeek += framesMixed; 528c065779232fdd89abace68d2fc7bea786a010d7Glenn Kasten audioPlayer->mPlay.mFramesSincePositionUpdate += framesMixed; 538c065779232fdd89abace68d2fc7bea786a010d7Glenn Kasten } 548c065779232fdd89abace68d2fc7bea786a010d7Glenn Kasten 554b65ef9efdf5aba01bea89d8cdd64f500560a28dGlenn Kasten SLboolean doBroadcast = SL_BOOLEAN_FALSE; 564b65ef9efdf5aba01bea89d8cdd64f500560a28dGlenn Kasten const BufferHeader *oldFront; 574b65ef9efdf5aba01bea89d8cdd64f500560a28dGlenn Kasten 584b65ef9efdf5aba01bea89d8cdd64f500560a28dGlenn Kasten if (audioPlayer->mBufferQueue.mClearRequested) { 594b65ef9efdf5aba01bea89d8cdd64f500560a28dGlenn Kasten // application thread(s) that call BufferQueue::Clear while mixer is active 604b65ef9efdf5aba01bea89d8cdd64f500560a28dGlenn Kasten // is active will block synchronously until mixer acknowledges the Clear request 614b65ef9efdf5aba01bea89d8cdd64f500560a28dGlenn Kasten audioPlayer->mBufferQueue.mFront = &audioPlayer->mBufferQueue.mArray[0]; 624b65ef9efdf5aba01bea89d8cdd64f500560a28dGlenn Kasten audioPlayer->mBufferQueue.mRear = &audioPlayer->mBufferQueue.mArray[0]; 634b65ef9efdf5aba01bea89d8cdd64f500560a28dGlenn Kasten audioPlayer->mBufferQueue.mState.count = 0; 644f064c143ef2b26347130a49788116b5d2e1252aGlenn Kasten audioPlayer->mBufferQueue.mState.playIndex = 0; 654b65ef9efdf5aba01bea89d8cdd64f500560a28dGlenn Kasten audioPlayer->mBufferQueue.mClearRequested = SL_BOOLEAN_FALSE; 664b65ef9efdf5aba01bea89d8cdd64f500560a28dGlenn Kasten track->mReader = NULL; 674b65ef9efdf5aba01bea89d8cdd64f500560a28dGlenn Kasten track->mAvail = 0; 684b65ef9efdf5aba01bea89d8cdd64f500560a28dGlenn Kasten doBroadcast = SL_BOOLEAN_TRUE; 694b65ef9efdf5aba01bea89d8cdd64f500560a28dGlenn Kasten } 704b65ef9efdf5aba01bea89d8cdd64f500560a28dGlenn Kasten 714b65ef9efdf5aba01bea89d8cdd64f500560a28dGlenn Kasten switch (audioPlayer->mPlay.mState) { 724b65ef9efdf5aba01bea89d8cdd64f500560a28dGlenn Kasten 734b65ef9efdf5aba01bea89d8cdd64f500560a28dGlenn Kasten case SL_PLAYSTATE_PLAYING: // continue playing current track data 744b65ef9efdf5aba01bea89d8cdd64f500560a28dGlenn Kasten if (0 < track->mAvail) { 754b65ef9efdf5aba01bea89d8cdd64f500560a28dGlenn Kasten trackHasData = SL_BOOLEAN_TRUE; 764b65ef9efdf5aba01bea89d8cdd64f500560a28dGlenn Kasten break; 774b65ef9efdf5aba01bea89d8cdd64f500560a28dGlenn Kasten } 784b65ef9efdf5aba01bea89d8cdd64f500560a28dGlenn Kasten 794b65ef9efdf5aba01bea89d8cdd64f500560a28dGlenn Kasten // try to get another buffer from queue 804b65ef9efdf5aba01bea89d8cdd64f500560a28dGlenn Kasten oldFront = audioPlayer->mBufferQueue.mFront; 814b65ef9efdf5aba01bea89d8cdd64f500560a28dGlenn Kasten if (oldFront != audioPlayer->mBufferQueue.mRear) { 824b65ef9efdf5aba01bea89d8cdd64f500560a28dGlenn Kasten assert(0 < audioPlayer->mBufferQueue.mState.count); 834b65ef9efdf5aba01bea89d8cdd64f500560a28dGlenn Kasten track->mReader = oldFront->mBuffer; 844b65ef9efdf5aba01bea89d8cdd64f500560a28dGlenn Kasten track->mAvail = oldFront->mSize; 854b65ef9efdf5aba01bea89d8cdd64f500560a28dGlenn Kasten // note that the buffer stays on the queue while we are reading 864b65ef9efdf5aba01bea89d8cdd64f500560a28dGlenn Kasten audioPlayer->mPlay.mState = SL_PLAYSTATE_PLAYING; 874b65ef9efdf5aba01bea89d8cdd64f500560a28dGlenn Kasten trackHasData = SL_BOOLEAN_TRUE; 884b65ef9efdf5aba01bea89d8cdd64f500560a28dGlenn Kasten } else { 894b65ef9efdf5aba01bea89d8cdd64f500560a28dGlenn Kasten // no buffers on queue, so playable but not playing 904b65ef9efdf5aba01bea89d8cdd64f500560a28dGlenn Kasten // NTH should be able to call a desperation callback when completely starved, 914b65ef9efdf5aba01bea89d8cdd64f500560a28dGlenn Kasten // or call less often than every buffer based on high/low water-marks 924b65ef9efdf5aba01bea89d8cdd64f500560a28dGlenn Kasten } 934b65ef9efdf5aba01bea89d8cdd64f500560a28dGlenn Kasten break; 944b65ef9efdf5aba01bea89d8cdd64f500560a28dGlenn Kasten 954b65ef9efdf5aba01bea89d8cdd64f500560a28dGlenn Kasten case SL_PLAYSTATE_STOPPING: // application thread(s) called Play::SetPlayState(STOPPED) 964b65ef9efdf5aba01bea89d8cdd64f500560a28dGlenn Kasten audioPlayer->mPlay.mPosition = (SLmillisecond) 0; 978c065779232fdd89abace68d2fc7bea786a010d7Glenn Kasten audioPlayer->mPlay.mFramesSinceLastSeek = 0; 988c065779232fdd89abace68d2fc7bea786a010d7Glenn Kasten audioPlayer->mPlay.mFramesSincePositionUpdate = 0; 998c065779232fdd89abace68d2fc7bea786a010d7Glenn Kasten audioPlayer->mPlay.mLastSeekPosition = 0; 1004b65ef9efdf5aba01bea89d8cdd64f500560a28dGlenn Kasten audioPlayer->mPlay.mState = SL_PLAYSTATE_STOPPED; 1018c065779232fdd89abace68d2fc7bea786a010d7Glenn Kasten // stop cancels a pending seek 1028c065779232fdd89abace68d2fc7bea786a010d7Glenn Kasten audioPlayer->mSeek.mPos = SL_TIME_UNKNOWN; 1034b65ef9efdf5aba01bea89d8cdd64f500560a28dGlenn Kasten oldFront = audioPlayer->mBufferQueue.mFront; 1044b65ef9efdf5aba01bea89d8cdd64f500560a28dGlenn Kasten if (oldFront != audioPlayer->mBufferQueue.mRear) { 1054b65ef9efdf5aba01bea89d8cdd64f500560a28dGlenn Kasten assert(0 < audioPlayer->mBufferQueue.mState.count); 1064b65ef9efdf5aba01bea89d8cdd64f500560a28dGlenn Kasten track->mReader = oldFront->mBuffer; 1074b65ef9efdf5aba01bea89d8cdd64f500560a28dGlenn Kasten track->mAvail = oldFront->mSize; 1084b65ef9efdf5aba01bea89d8cdd64f500560a28dGlenn Kasten } 1094b65ef9efdf5aba01bea89d8cdd64f500560a28dGlenn Kasten doBroadcast = SL_BOOLEAN_TRUE; 1104b65ef9efdf5aba01bea89d8cdd64f500560a28dGlenn Kasten break; 1114b65ef9efdf5aba01bea89d8cdd64f500560a28dGlenn Kasten 1124b65ef9efdf5aba01bea89d8cdd64f500560a28dGlenn Kasten case SL_PLAYSTATE_STOPPED: // idle 1134b65ef9efdf5aba01bea89d8cdd64f500560a28dGlenn Kasten case SL_PLAYSTATE_PAUSED: // idle 1144b65ef9efdf5aba01bea89d8cdd64f500560a28dGlenn Kasten break; 1154b65ef9efdf5aba01bea89d8cdd64f500560a28dGlenn Kasten 1164b65ef9efdf5aba01bea89d8cdd64f500560a28dGlenn Kasten default: 1174b65ef9efdf5aba01bea89d8cdd64f500560a28dGlenn Kasten assert(SL_BOOLEAN_FALSE); 1184b65ef9efdf5aba01bea89d8cdd64f500560a28dGlenn Kasten break; 1194b65ef9efdf5aba01bea89d8cdd64f500560a28dGlenn Kasten } 1204b65ef9efdf5aba01bea89d8cdd64f500560a28dGlenn Kasten 1218c065779232fdd89abace68d2fc7bea786a010d7Glenn Kasten if (doBroadcast) { 1224b65ef9efdf5aba01bea89d8cdd64f500560a28dGlenn Kasten object_cond_broadcast(&audioPlayer->mObject); 1238c065779232fdd89abace68d2fc7bea786a010d7Glenn Kasten } 1244b65ef9efdf5aba01bea89d8cdd64f500560a28dGlenn Kasten 1254b65ef9efdf5aba01bea89d8cdd64f500560a28dGlenn Kasten object_unlock_exclusive(&audioPlayer->mObject); 1264b65ef9efdf5aba01bea89d8cdd64f500560a28dGlenn Kasten 1274b65ef9efdf5aba01bea89d8cdd64f500560a28dGlenn Kasten } 1284b65ef9efdf5aba01bea89d8cdd64f500560a28dGlenn Kasten 1294b65ef9efdf5aba01bea89d8cdd64f500560a28dGlenn Kasten return trackHasData; 1304b65ef9efdf5aba01bea89d8cdd64f500560a28dGlenn Kasten 1314b65ef9efdf5aba01bea89d8cdd64f500560a28dGlenn Kasten} 1324b65ef9efdf5aba01bea89d8cdd64f500560a28dGlenn Kasten 133343c522ebf4f9c321eef8c3b3b2945f1c1cb8846Glenn Kasten 134343c522ebf4f9c321eef8c3b3b2945f1c1cb8846Glenn Kasten/** \brief This is the mixer for SDL: fill the specified 16-bit stereo PCM buffer */ 135343c522ebf4f9c321eef8c3b3b2945f1c1cb8846Glenn Kasten 136e5d006b298ce7683d66f7ec86136403cf5fb20d6Glenn Kastenvoid IOutputMixExt_FillBuffer(SLOutputMixExtItf self, void *pBuffer, SLuint32 size) 137b7154f2324c8ae44b820c07c69aaa80a4bb9e418Glenn Kasten{ 138ed46c29d6a09112dbbf584c82953f63289596fd6Glenn Kasten SL_ENTER_INTERFACE_VOID 139ed46c29d6a09112dbbf584c82953f63289596fd6Glenn Kasten 140b7154f2324c8ae44b820c07c69aaa80a4bb9e418Glenn Kasten // Force to be a multiple of a frame, assumes stereo 16-bit PCM 141b7154f2324c8ae44b820c07c69aaa80a4bb9e418Glenn Kasten size &= ~3; 142daf661248ff6ea2e21799e5114c78b7c1d49630eGlenn Kasten IOutputMixExt *thisExt = (IOutputMixExt *) self; 143d07ed7df4ec9338f97f12627690d58ed9b34f25bGlenn Kasten IOutputMix *this = &((COutputMix *) InterfaceToIObject(thisExt))->mOutputMix; 144b7154f2324c8ae44b820c07c69aaa80a4bb9e418Glenn Kasten unsigned activeMask = this->mActiveMask; 145b7154f2324c8ae44b820c07c69aaa80a4bb9e418Glenn Kasten SLboolean mixBufferHasData = SL_BOOLEAN_FALSE; 146d07ed7df4ec9338f97f12627690d58ed9b34f25bGlenn Kasten while (activeMask) { 147d07ed7df4ec9338f97f12627690d58ed9b34f25bGlenn Kasten unsigned i = ctz(activeMask); 148d07ed7df4ec9338f97f12627690d58ed9b34f25bGlenn Kasten assert(MAX_TRACK > i); 149d07ed7df4ec9338f97f12627690d58ed9b34f25bGlenn Kasten activeMask &= ~(1 << i); 150369f3138f19f7102bf0f98b890ab84c8df633a93Glenn Kasten Track *track = &this->mTracks[i]; 1514b65ef9efdf5aba01bea89d8cdd64f500560a28dGlenn Kasten 152b7154f2324c8ae44b820c07c69aaa80a4bb9e418Glenn Kasten // track is allocated 1534b65ef9efdf5aba01bea89d8cdd64f500560a28dGlenn Kasten 1548c065779232fdd89abace68d2fc7bea786a010d7Glenn Kasten if (!track_check(track)) { 155b7154f2324c8ae44b820c07c69aaa80a4bb9e418Glenn Kasten continue; 1568c065779232fdd89abace68d2fc7bea786a010d7Glenn Kasten } 1574b65ef9efdf5aba01bea89d8cdd64f500560a28dGlenn Kasten 158b7154f2324c8ae44b820c07c69aaa80a4bb9e418Glenn Kasten // track is playing 159b7154f2324c8ae44b820c07c69aaa80a4bb9e418Glenn Kasten void *dstWriter = pBuffer; 160b7154f2324c8ae44b820c07c69aaa80a4bb9e418Glenn Kasten unsigned desired = size; 161b7154f2324c8ae44b820c07c69aaa80a4bb9e418Glenn Kasten SLboolean trackContributedToMix = SL_BOOLEAN_FALSE; 162e5bf0d2c9531a7064eb3ddcafaf93ac1b0974037Glenn Kasten float gains[STEREO_CHANNELS]; 163e5bf0d2c9531a7064eb3ddcafaf93ac1b0974037Glenn Kasten Summary summaries[STEREO_CHANNELS]; 164e5bf0d2c9531a7064eb3ddcafaf93ac1b0974037Glenn Kasten unsigned channel; 165e5bf0d2c9531a7064eb3ddcafaf93ac1b0974037Glenn Kasten for (channel = 0; channel < STEREO_CHANNELS; ++channel) { 166e5bf0d2c9531a7064eb3ddcafaf93ac1b0974037Glenn Kasten float gain = track->mGains[channel]; 167e5bf0d2c9531a7064eb3ddcafaf93ac1b0974037Glenn Kasten gains[channel] = gain; 168e5bf0d2c9531a7064eb3ddcafaf93ac1b0974037Glenn Kasten Summary summary; 1698c065779232fdd89abace68d2fc7bea786a010d7Glenn Kasten if (gain <= 0.001) { 170e5bf0d2c9531a7064eb3ddcafaf93ac1b0974037Glenn Kasten summary = GAIN_MUTE; 1718c065779232fdd89abace68d2fc7bea786a010d7Glenn Kasten } else if (gain >= 0.999) { 172e5bf0d2c9531a7064eb3ddcafaf93ac1b0974037Glenn Kasten summary = GAIN_UNITY; 1738c065779232fdd89abace68d2fc7bea786a010d7Glenn Kasten } else { 174e5bf0d2c9531a7064eb3ddcafaf93ac1b0974037Glenn Kasten summary = GAIN_OTHER; 1758c065779232fdd89abace68d2fc7bea786a010d7Glenn Kasten } 176e5bf0d2c9531a7064eb3ddcafaf93ac1b0974037Glenn Kasten summaries[channel] = summary; 1776a357b8fa57b0bc1557cd5ab9f9fb86aabaaa18cGlenn Kasten } 178b7154f2324c8ae44b820c07c69aaa80a4bb9e418Glenn Kasten while (desired > 0) { 179b7154f2324c8ae44b820c07c69aaa80a4bb9e418Glenn Kasten unsigned actual = desired; 1808c065779232fdd89abace68d2fc7bea786a010d7Glenn Kasten if (track->mAvail < actual) { 181b7154f2324c8ae44b820c07c69aaa80a4bb9e418Glenn Kasten actual = track->mAvail; 1828c065779232fdd89abace68d2fc7bea786a010d7Glenn Kasten } 183b7154f2324c8ae44b820c07c69aaa80a4bb9e418Glenn Kasten // force actual to be a frame multiple 184b7154f2324c8ae44b820c07c69aaa80a4bb9e418Glenn Kasten if (actual > 0) { 185b7154f2324c8ae44b820c07c69aaa80a4bb9e418Glenn Kasten assert(NULL != track->mReader); 186276cab2d983b892d1b634474b6249f6bec400c76Glenn Kasten stereo *mixBuffer = (stereo *) dstWriter; 187276cab2d983b892d1b634474b6249f6bec400c76Glenn Kasten const stereo *source = (const stereo *) track->mReader; 188276cab2d983b892d1b634474b6249f6bec400c76Glenn Kasten unsigned j; 189e5bf0d2c9531a7064eb3ddcafaf93ac1b0974037Glenn Kasten if (GAIN_MUTE != summaries[0] || GAIN_MUTE != summaries[1]) { 19040d1c40832a448e23d0bb37512aee53222575c2eGlenn Kasten if (mixBufferHasData) { 19140d1c40832a448e23d0bb37512aee53222575c2eGlenn Kasten // apply gain during add 192e5bf0d2c9531a7064eb3ddcafaf93ac1b0974037Glenn Kasten if (GAIN_UNITY != summaries[0] || GAIN_UNITY != summaries[1]) { 19340d1c40832a448e23d0bb37512aee53222575c2eGlenn Kasten for (j = 0; j < actual; j += sizeof(stereo), ++mixBuffer, ++source) { 194e5bf0d2c9531a7064eb3ddcafaf93ac1b0974037Glenn Kasten mixBuffer->left += (short) (source->left * track->mGains[0]); 195e5bf0d2c9531a7064eb3ddcafaf93ac1b0974037Glenn Kasten mixBuffer->right += (short) (source->right * track->mGains[1]); 19640d1c40832a448e23d0bb37512aee53222575c2eGlenn Kasten } 19740d1c40832a448e23d0bb37512aee53222575c2eGlenn Kasten // no gain adjustment needed, so do a simple add 19840d1c40832a448e23d0bb37512aee53222575c2eGlenn Kasten } else { 19940d1c40832a448e23d0bb37512aee53222575c2eGlenn Kasten for (j = 0; j < actual; j += sizeof(stereo), ++mixBuffer, ++source) { 20040d1c40832a448e23d0bb37512aee53222575c2eGlenn Kasten mixBuffer->left += source->left; 20140d1c40832a448e23d0bb37512aee53222575c2eGlenn Kasten mixBuffer->right += source->right; 20240d1c40832a448e23d0bb37512aee53222575c2eGlenn Kasten } 20340d1c40832a448e23d0bb37512aee53222575c2eGlenn Kasten } 20440d1c40832a448e23d0bb37512aee53222575c2eGlenn Kasten } else { 20540d1c40832a448e23d0bb37512aee53222575c2eGlenn Kasten // apply gain during copy 206e5bf0d2c9531a7064eb3ddcafaf93ac1b0974037Glenn Kasten if (GAIN_UNITY != summaries[0] || GAIN_UNITY != summaries[1]) { 20740d1c40832a448e23d0bb37512aee53222575c2eGlenn Kasten for (j = 0; j < actual; j += sizeof(stereo), ++mixBuffer, ++source) { 208e5bf0d2c9531a7064eb3ddcafaf93ac1b0974037Glenn Kasten mixBuffer->left = (short) (source->left * track->mGains[0]); 209e5bf0d2c9531a7064eb3ddcafaf93ac1b0974037Glenn Kasten mixBuffer->right = (short) (source->right * track->mGains[1]); 21040d1c40832a448e23d0bb37512aee53222575c2eGlenn Kasten } 21140d1c40832a448e23d0bb37512aee53222575c2eGlenn Kasten // no gain adjustment needed, so do a simple copy 21240d1c40832a448e23d0bb37512aee53222575c2eGlenn Kasten } else { 21340d1c40832a448e23d0bb37512aee53222575c2eGlenn Kasten memcpy(dstWriter, track->mReader, actual); 21440d1c40832a448e23d0bb37512aee53222575c2eGlenn Kasten } 215276cab2d983b892d1b634474b6249f6bec400c76Glenn Kasten } 216b7154f2324c8ae44b820c07c69aaa80a4bb9e418Glenn Kasten trackContributedToMix = SL_BOOLEAN_TRUE; 217b7154f2324c8ae44b820c07c69aaa80a4bb9e418Glenn Kasten } 218b7154f2324c8ae44b820c07c69aaa80a4bb9e418Glenn Kasten dstWriter = (char *) dstWriter + actual; 219b7154f2324c8ae44b820c07c69aaa80a4bb9e418Glenn Kasten desired -= actual; 220b7154f2324c8ae44b820c07c69aaa80a4bb9e418Glenn Kasten track->mReader = (char *) track->mReader + actual; 221b7154f2324c8ae44b820c07c69aaa80a4bb9e418Glenn Kasten track->mAvail -= actual; 222b7154f2324c8ae44b820c07c69aaa80a4bb9e418Glenn Kasten if (track->mAvail == 0) { 2234b65ef9efdf5aba01bea89d8cdd64f500560a28dGlenn Kasten IBufferQueue *bufferQueue = &track->mAudioPlayer->mBufferQueue; 2244b65ef9efdf5aba01bea89d8cdd64f500560a28dGlenn Kasten interface_lock_exclusive(bufferQueue); 2254b65ef9efdf5aba01bea89d8cdd64f500560a28dGlenn Kasten const BufferHeader *oldFront, *newFront, *rear; 2264b65ef9efdf5aba01bea89d8cdd64f500560a28dGlenn Kasten oldFront = bufferQueue->mFront; 2274b65ef9efdf5aba01bea89d8cdd64f500560a28dGlenn Kasten rear = bufferQueue->mRear; 2284b65ef9efdf5aba01bea89d8cdd64f500560a28dGlenn Kasten // a buffer stays on queue while playing, so it better still be there 2294b65ef9efdf5aba01bea89d8cdd64f500560a28dGlenn Kasten assert(oldFront != rear); 2304b65ef9efdf5aba01bea89d8cdd64f500560a28dGlenn Kasten newFront = oldFront; 2318c065779232fdd89abace68d2fc7bea786a010d7Glenn Kasten if (++newFront == &bufferQueue->mArray[bufferQueue->mNumBuffers + 1]) { 2324b65ef9efdf5aba01bea89d8cdd64f500560a28dGlenn Kasten newFront = bufferQueue->mArray; 2338c065779232fdd89abace68d2fc7bea786a010d7Glenn Kasten } 2344b65ef9efdf5aba01bea89d8cdd64f500560a28dGlenn Kasten bufferQueue->mFront = (BufferHeader *) newFront; 2354b65ef9efdf5aba01bea89d8cdd64f500560a28dGlenn Kasten assert(0 < bufferQueue->mState.count); 2364b65ef9efdf5aba01bea89d8cdd64f500560a28dGlenn Kasten --bufferQueue->mState.count; 2374b65ef9efdf5aba01bea89d8cdd64f500560a28dGlenn Kasten if (newFront != rear) { 2384b65ef9efdf5aba01bea89d8cdd64f500560a28dGlenn Kasten // we don't acknowledge application requests between buffers 2394b65ef9efdf5aba01bea89d8cdd64f500560a28dGlenn Kasten // within the same mixer frame 240b7154f2324c8ae44b820c07c69aaa80a4bb9e418Glenn Kasten assert(0 < bufferQueue->mState.count); 2414b65ef9efdf5aba01bea89d8cdd64f500560a28dGlenn Kasten track->mReader = newFront->mBuffer; 2424b65ef9efdf5aba01bea89d8cdd64f500560a28dGlenn Kasten track->mAvail = newFront->mSize; 2434b65ef9efdf5aba01bea89d8cdd64f500560a28dGlenn Kasten } 2444b65ef9efdf5aba01bea89d8cdd64f500560a28dGlenn Kasten // else we would set play state to playable but not playing during next mixer 2454b65ef9efdf5aba01bea89d8cdd64f500560a28dGlenn Kasten // frame if the queue is still empty at that time 2464b65ef9efdf5aba01bea89d8cdd64f500560a28dGlenn Kasten ++bufferQueue->mState.playIndex; 2474b65ef9efdf5aba01bea89d8cdd64f500560a28dGlenn Kasten slBufferQueueCallback callback = bufferQueue->mCallback; 2484b65ef9efdf5aba01bea89d8cdd64f500560a28dGlenn Kasten void *context = bufferQueue->mContext; 2494b65ef9efdf5aba01bea89d8cdd64f500560a28dGlenn Kasten interface_unlock_exclusive(bufferQueue); 2504b65ef9efdf5aba01bea89d8cdd64f500560a28dGlenn Kasten // The callback function is called on each buffer completion 2514b65ef9efdf5aba01bea89d8cdd64f500560a28dGlenn Kasten if (NULL != callback) { 2524b65ef9efdf5aba01bea89d8cdd64f500560a28dGlenn Kasten (*callback)((SLBufferQueueItf) bufferQueue, context); 2534b65ef9efdf5aba01bea89d8cdd64f500560a28dGlenn Kasten // Maybe it enqueued another buffer, or maybe it didn't. 2544b65ef9efdf5aba01bea89d8cdd64f500560a28dGlenn Kasten // We will find out later during the next mixer frame. 255b7154f2324c8ae44b820c07c69aaa80a4bb9e418Glenn Kasten } 256b7154f2324c8ae44b820c07c69aaa80a4bb9e418Glenn Kasten } 2578c065779232fdd89abace68d2fc7bea786a010d7Glenn Kasten // no lock, but safe because noone else updates this field 2588c065779232fdd89abace68d2fc7bea786a010d7Glenn Kasten track->mFramesMixed += actual >> 2; // sizeof(short) * STEREO_CHANNELS 259b7154f2324c8ae44b820c07c69aaa80a4bb9e418Glenn Kasten continue; 260b7154f2324c8ae44b820c07c69aaa80a4bb9e418Glenn Kasten } 2614b65ef9efdf5aba01bea89d8cdd64f500560a28dGlenn Kasten // we need more data: desired > 0 but actual == 0 2628c065779232fdd89abace68d2fc7bea786a010d7Glenn Kasten if (track_check(track)) { 2634b65ef9efdf5aba01bea89d8cdd64f500560a28dGlenn Kasten continue; 2648c065779232fdd89abace68d2fc7bea786a010d7Glenn Kasten } 2654b65ef9efdf5aba01bea89d8cdd64f500560a28dGlenn Kasten // underflow: clear out rest of partial buffer (NTH synthesize comfort noise) 2668c065779232fdd89abace68d2fc7bea786a010d7Glenn Kasten if (!mixBufferHasData && trackContributedToMix) { 267b7154f2324c8ae44b820c07c69aaa80a4bb9e418Glenn Kasten memset(dstWriter, 0, actual); 2688c065779232fdd89abace68d2fc7bea786a010d7Glenn Kasten } 269b7154f2324c8ae44b820c07c69aaa80a4bb9e418Glenn Kasten break; 270b7154f2324c8ae44b820c07c69aaa80a4bb9e418Glenn Kasten } 2718c065779232fdd89abace68d2fc7bea786a010d7Glenn Kasten if (trackContributedToMix) { 272b7154f2324c8ae44b820c07c69aaa80a4bb9e418Glenn Kasten mixBufferHasData = SL_BOOLEAN_TRUE; 2738c065779232fdd89abace68d2fc7bea786a010d7Glenn Kasten } 274b7154f2324c8ae44b820c07c69aaa80a4bb9e418Glenn Kasten } 275b7154f2324c8ae44b820c07c69aaa80a4bb9e418Glenn Kasten // No active tracks, so output silence 2768c065779232fdd89abace68d2fc7bea786a010d7Glenn Kasten if (!mixBufferHasData) { 277b7154f2324c8ae44b820c07c69aaa80a4bb9e418Glenn Kasten memset(pBuffer, 0, size); 2788c065779232fdd89abace68d2fc7bea786a010d7Glenn Kasten } 279ed46c29d6a09112dbbf584c82953f63289596fd6Glenn Kasten 280ed46c29d6a09112dbbf584c82953f63289596fd6Glenn Kasten SL_LEAVE_INTERFACE_VOID 281b7154f2324c8ae44b820c07c69aaa80a4bb9e418Glenn Kasten} 282b7154f2324c8ae44b820c07c69aaa80a4bb9e418Glenn Kasten 283ed46c29d6a09112dbbf584c82953f63289596fd6Glenn Kasten 284b7154f2324c8ae44b820c07c69aaa80a4bb9e418Glenn Kastenstatic const struct SLOutputMixExtItf_ IOutputMixExt_Itf = { 285b7154f2324c8ae44b820c07c69aaa80a4bb9e418Glenn Kasten IOutputMixExt_FillBuffer 286b7154f2324c8ae44b820c07c69aaa80a4bb9e418Glenn Kasten}; 287b7154f2324c8ae44b820c07c69aaa80a4bb9e418Glenn Kasten 288b7154f2324c8ae44b820c07c69aaa80a4bb9e418Glenn Kastenvoid IOutputMixExt_init(void *self) 289b7154f2324c8ae44b820c07c69aaa80a4bb9e418Glenn Kasten{ 290b7154f2324c8ae44b820c07c69aaa80a4bb9e418Glenn Kasten IOutputMixExt *this = (IOutputMixExt *) self; 291b7154f2324c8ae44b820c07c69aaa80a4bb9e418Glenn Kasten this->mItf = &IOutputMixExt_Itf; 292b7154f2324c8ae44b820c07c69aaa80a4bb9e418Glenn Kasten} 293b7154f2324c8ae44b820c07c69aaa80a4bb9e418Glenn Kasten 294343c522ebf4f9c321eef8c3b3b2945f1c1cb8846Glenn Kasten 295343c522ebf4f9c321eef8c3b3b2945f1c1cb8846Glenn Kasten/** \brief Called by Object::Destroy for an AudioPlayer to release the associated track */ 296343c522ebf4f9c321eef8c3b3b2945f1c1cb8846Glenn Kasten 297343c522ebf4f9c321eef8c3b3b2945f1c1cb8846Glenn Kastenvoid IOutputMixExt_Destroy(CAudioPlayer *this) 298343c522ebf4f9c321eef8c3b3b2945f1c1cb8846Glenn Kasten{ 299343c522ebf4f9c321eef8c3b3b2945f1c1cb8846Glenn Kasten COutputMix *outputMix = this->mOutputMix; 300343c522ebf4f9c321eef8c3b3b2945f1c1cb8846Glenn Kasten if (NULL != outputMix) { 301343c522ebf4f9c321eef8c3b3b2945f1c1cb8846Glenn Kasten Track *track = this->mTrack; 302343c522ebf4f9c321eef8c3b3b2945f1c1cb8846Glenn Kasten assert(NULL != track); 303343c522ebf4f9c321eef8c3b3b2945f1c1cb8846Glenn Kasten assert(track->mAudioPlayer == this); 304343c522ebf4f9c321eef8c3b3b2945f1c1cb8846Glenn Kasten unsigned i = track - outputMix->mOutputMix.mTracks; 305343c522ebf4f9c321eef8c3b3b2945f1c1cb8846Glenn Kasten assert( /* 0 <= i && */ i < MAX_TRACK); 306343c522ebf4f9c321eef8c3b3b2945f1c1cb8846Glenn Kasten unsigned mask = 1 << i; 307343c522ebf4f9c321eef8c3b3b2945f1c1cb8846Glenn Kasten // FIXME deadlock possible here due to undocumented lock ordering 308343c522ebf4f9c321eef8c3b3b2945f1c1cb8846Glenn Kasten object_lock_exclusive(&outputMix->mObject); 309343c522ebf4f9c321eef8c3b3b2945f1c1cb8846Glenn Kasten // FIXME how can we be sure the mixer is not reading from this track right now? 310343c522ebf4f9c321eef8c3b3b2945f1c1cb8846Glenn Kasten track->mAudioPlayer = NULL; 311343c522ebf4f9c321eef8c3b3b2945f1c1cb8846Glenn Kasten assert(outputMix->mOutputMix.mActiveMask & mask); 312343c522ebf4f9c321eef8c3b3b2945f1c1cb8846Glenn Kasten outputMix->mOutputMix.mActiveMask &= ~mask; 313343c522ebf4f9c321eef8c3b3b2945f1c1cb8846Glenn Kasten object_unlock_exclusive(&outputMix->mObject); 314343c522ebf4f9c321eef8c3b3b2945f1c1cb8846Glenn Kasten this->mTrack = NULL; 315343c522ebf4f9c321eef8c3b3b2945f1c1cb8846Glenn Kasten } 316343c522ebf4f9c321eef8c3b3b2945f1c1cb8846Glenn Kasten} 317343c522ebf4f9c321eef8c3b3b2945f1c1cb8846Glenn Kasten 318343c522ebf4f9c321eef8c3b3b2945f1c1cb8846Glenn Kasten 319343c522ebf4f9c321eef8c3b3b2945f1c1cb8846Glenn Kasten/** \brief Called by Engine::CreateAudioPlayer to allocate a track */ 320343c522ebf4f9c321eef8c3b3b2945f1c1cb8846Glenn Kasten 321acd88797a1d3b8225bab888d29036e245f275be5Glenn KastenSLresult IOutputMixExt_checkAudioPlayerSourceSink(CAudioPlayer *this) 322daf661248ff6ea2e21799e5114c78b7c1d49630eGlenn Kasten{ 323e5bf0d2c9531a7064eb3ddcafaf93ac1b0974037Glenn Kasten this->mTrack = NULL; 324acd88797a1d3b8225bab888d29036e245f275be5Glenn Kasten const SLDataSink *pAudioSnk = &this->mDataSink.u.mSink; 325369f3138f19f7102bf0f98b890ab84c8df633a93Glenn Kasten Track *track = NULL; 326daf661248ff6ea2e21799e5114c78b7c1d49630eGlenn Kasten switch (*(SLuint32 *)pAudioSnk->pLocator) { 327daf661248ff6ea2e21799e5114c78b7c1d49630eGlenn Kasten case SL_DATALOCATOR_OUTPUTMIX: 328daf661248ff6ea2e21799e5114c78b7c1d49630eGlenn Kasten { 329daf661248ff6ea2e21799e5114c78b7c1d49630eGlenn Kasten // pAudioSnk->pFormat is ignored 330e5bf0d2c9531a7064eb3ddcafaf93ac1b0974037Glenn Kasten IOutputMix *om = &((COutputMix *) ((SLDataLocator_OutputMix *) 331e5bf0d2c9531a7064eb3ddcafaf93ac1b0974037Glenn Kasten pAudioSnk->pLocator)->outputMix)->mOutputMix; 332daf661248ff6ea2e21799e5114c78b7c1d49630eGlenn Kasten // allocate an entry within OutputMix for this track 333d07ed7df4ec9338f97f12627690d58ed9b34f25bGlenn Kasten interface_lock_exclusive(om); 334d07ed7df4ec9338f97f12627690d58ed9b34f25bGlenn Kasten unsigned availMask = ~om->mActiveMask; 335d07ed7df4ec9338f97f12627690d58ed9b34f25bGlenn Kasten if (!availMask) { 336d07ed7df4ec9338f97f12627690d58ed9b34f25bGlenn Kasten interface_unlock_exclusive(om); 337d07ed7df4ec9338f97f12627690d58ed9b34f25bGlenn Kasten // All track slots full in output mix 338daf661248ff6ea2e21799e5114c78b7c1d49630eGlenn Kasten return SL_RESULT_MEMORY_FAILURE; 339daf661248ff6ea2e21799e5114c78b7c1d49630eGlenn Kasten } 340d07ed7df4ec9338f97f12627690d58ed9b34f25bGlenn Kasten unsigned i = ctz(availMask); 341d07ed7df4ec9338f97f12627690d58ed9b34f25bGlenn Kasten assert(MAX_TRACK > i); 342d07ed7df4ec9338f97f12627690d58ed9b34f25bGlenn Kasten om->mActiveMask |= 1 << i; 343d07ed7df4ec9338f97f12627690d58ed9b34f25bGlenn Kasten track = &om->mTracks[i]; 344276cab2d983b892d1b634474b6249f6bec400c76Glenn Kasten track->mAudioPlayer = NULL; // only field that is accessed before full initialization 345d07ed7df4ec9338f97f12627690d58ed9b34f25bGlenn Kasten interface_unlock_exclusive(om); 346e5bf0d2c9531a7064eb3ddcafaf93ac1b0974037Glenn Kasten this->mTrack = track; 347daf661248ff6ea2e21799e5114c78b7c1d49630eGlenn Kasten } 348daf661248ff6ea2e21799e5114c78b7c1d49630eGlenn Kasten break; 349daf661248ff6ea2e21799e5114c78b7c1d49630eGlenn Kasten default: 350daf661248ff6ea2e21799e5114c78b7c1d49630eGlenn Kasten return SL_RESULT_CONTENT_UNSUPPORTED; 351daf661248ff6ea2e21799e5114c78b7c1d49630eGlenn Kasten } 352daf661248ff6ea2e21799e5114c78b7c1d49630eGlenn Kasten 353d07ed7df4ec9338f97f12627690d58ed9b34f25bGlenn Kasten // FIXME Wrong place for this initialization; should first pre-allocate a track slot 354d07ed7df4ec9338f97f12627690d58ed9b34f25bGlenn Kasten // using OutputMixExt.mTrackCount, then initialize full audio player, then do track bit 355d07ed7df4ec9338f97f12627690d58ed9b34f25bGlenn Kasten // allocation, initialize rest of track, and doubly-link track to player (currently single). 356d07ed7df4ec9338f97f12627690d58ed9b34f25bGlenn Kasten assert(NULL != track); 357acd88797a1d3b8225bab888d29036e245f275be5Glenn Kasten track->mBufferQueue = &this->mBufferQueue; 358276cab2d983b892d1b634474b6249f6bec400c76Glenn Kasten track->mAudioPlayer = this; 359acd88797a1d3b8225bab888d29036e245f275be5Glenn Kasten track->mReader = NULL; 360acd88797a1d3b8225bab888d29036e245f275be5Glenn Kasten track->mAvail = 0; 361e5bf0d2c9531a7064eb3ddcafaf93ac1b0974037Glenn Kasten track->mGains[0] = 1.0f; 362e5bf0d2c9531a7064eb3ddcafaf93ac1b0974037Glenn Kasten track->mGains[1] = 1.0f; 3638c065779232fdd89abace68d2fc7bea786a010d7Glenn Kasten track->mFramesMixed = 0; 364daf661248ff6ea2e21799e5114c78b7c1d49630eGlenn Kasten return SL_RESULT_SUCCESS; 365daf661248ff6ea2e21799e5114c78b7c1d49630eGlenn Kasten} 366daf661248ff6ea2e21799e5114c78b7c1d49630eGlenn Kasten 367343c522ebf4f9c321eef8c3b3b2945f1c1cb8846Glenn Kasten 368343c522ebf4f9c321eef8c3b3b2945f1c1cb8846Glenn Kasten/** \brief Called when a gain-related field (mute, solo, volume, stereo position, etc.) updated */ 369343c522ebf4f9c321eef8c3b3b2945f1c1cb8846Glenn Kasten 370e5bf0d2c9531a7064eb3ddcafaf93ac1b0974037Glenn Kastenvoid audioPlayerGainUpdate(CAudioPlayer *audioPlayer) 371e5bf0d2c9531a7064eb3ddcafaf93ac1b0974037Glenn Kasten{ 372e5bf0d2c9531a7064eb3ddcafaf93ac1b0974037Glenn Kasten // FIXME need a lock on the track while updating gain 373369f3138f19f7102bf0f98b890ab84c8df633a93Glenn Kasten Track *track = audioPlayer->mTrack; 374e5bf0d2c9531a7064eb3ddcafaf93ac1b0974037Glenn Kasten 3758c065779232fdd89abace68d2fc7bea786a010d7Glenn Kasten if (NULL == track) { 376e5bf0d2c9531a7064eb3ddcafaf93ac1b0974037Glenn Kasten return; 3778c065779232fdd89abace68d2fc7bea786a010d7Glenn Kasten } 378e5bf0d2c9531a7064eb3ddcafaf93ac1b0974037Glenn Kasten 379e5bf0d2c9531a7064eb3ddcafaf93ac1b0974037Glenn Kasten SLboolean mute = audioPlayer->mVolume.mMute; 380b91e32605ecf39e34ad39936b1ee193bb4e30225Glenn Kasten SLuint8 muteMask = audioPlayer->mMuteMask; 381b91e32605ecf39e34ad39936b1ee193bb4e30225Glenn Kasten SLuint8 soloMask = audioPlayer->mSoloMask; 382e5bf0d2c9531a7064eb3ddcafaf93ac1b0974037Glenn Kasten SLmillibel level = audioPlayer->mVolume.mLevel; 383e5bf0d2c9531a7064eb3ddcafaf93ac1b0974037Glenn Kasten SLboolean enableStereoPosition = audioPlayer->mVolume.mEnableStereoPosition; 384e5bf0d2c9531a7064eb3ddcafaf93ac1b0974037Glenn Kasten SLpermille stereoPosition = audioPlayer->mVolume.mStereoPosition; 385e5bf0d2c9531a7064eb3ddcafaf93ac1b0974037Glenn Kasten 3868c065779232fdd89abace68d2fc7bea786a010d7Glenn Kasten if (soloMask) { 387e5bf0d2c9531a7064eb3ddcafaf93ac1b0974037Glenn Kasten muteMask |= ~soloMask; 3888c065779232fdd89abace68d2fc7bea786a010d7Glenn Kasten } 389e5bf0d2c9531a7064eb3ddcafaf93ac1b0974037Glenn Kasten if (mute || !(~muteMask & 3)) { 39018abcc4b70fab1f84d6fbebac3a8e34480a6c4d3Glenn Kasten track->mGains[0] = 0.0f; 39118abcc4b70fab1f84d6fbebac3a8e34480a6c4d3Glenn Kasten track->mGains[1] = 0.0f; 392e5bf0d2c9531a7064eb3ddcafaf93ac1b0974037Glenn Kasten } else { 39318abcc4b70fab1f84d6fbebac3a8e34480a6c4d3Glenn Kasten float playerGain = powf(10.0f, level / 2000.0f); 394e5bf0d2c9531a7064eb3ddcafaf93ac1b0974037Glenn Kasten unsigned channel; 395e5bf0d2c9531a7064eb3ddcafaf93ac1b0974037Glenn Kasten for (channel = 0; channel < STEREO_CHANNELS; ++channel) { 396e5bf0d2c9531a7064eb3ddcafaf93ac1b0974037Glenn Kasten float gain; 3978c065779232fdd89abace68d2fc7bea786a010d7Glenn Kasten if (muteMask & (1 << channel)) { 39818abcc4b70fab1f84d6fbebac3a8e34480a6c4d3Glenn Kasten gain = 0.0f; 3998c065779232fdd89abace68d2fc7bea786a010d7Glenn Kasten } else { 400e5bf0d2c9531a7064eb3ddcafaf93ac1b0974037Glenn Kasten gain = playerGain; 401e5bf0d2c9531a7064eb3ddcafaf93ac1b0974037Glenn Kasten if (enableStereoPosition) { 402e5bf0d2c9531a7064eb3ddcafaf93ac1b0974037Glenn Kasten switch (channel) { 403e5bf0d2c9531a7064eb3ddcafaf93ac1b0974037Glenn Kasten case 0: 4048c065779232fdd89abace68d2fc7bea786a010d7Glenn Kasten if (stereoPosition > 0) { 40518abcc4b70fab1f84d6fbebac3a8e34480a6c4d3Glenn Kasten gain *= (1000 - stereoPosition) / 1000.0f; 4068c065779232fdd89abace68d2fc7bea786a010d7Glenn Kasten } 407e5bf0d2c9531a7064eb3ddcafaf93ac1b0974037Glenn Kasten break; 408e5bf0d2c9531a7064eb3ddcafaf93ac1b0974037Glenn Kasten case 1: 4098c065779232fdd89abace68d2fc7bea786a010d7Glenn Kasten if (stereoPosition < 0) { 41018abcc4b70fab1f84d6fbebac3a8e34480a6c4d3Glenn Kasten gain *= (1000 + stereoPosition) / 1000.0f; 4118c065779232fdd89abace68d2fc7bea786a010d7Glenn Kasten } 412e5bf0d2c9531a7064eb3ddcafaf93ac1b0974037Glenn Kasten break; 413e5bf0d2c9531a7064eb3ddcafaf93ac1b0974037Glenn Kasten default: 414e5bf0d2c9531a7064eb3ddcafaf93ac1b0974037Glenn Kasten assert(SL_BOOLEAN_FALSE); 415e5bf0d2c9531a7064eb3ddcafaf93ac1b0974037Glenn Kasten break; 416e5bf0d2c9531a7064eb3ddcafaf93ac1b0974037Glenn Kasten } 417e5bf0d2c9531a7064eb3ddcafaf93ac1b0974037Glenn Kasten } 418e5bf0d2c9531a7064eb3ddcafaf93ac1b0974037Glenn Kasten } 419e5bf0d2c9531a7064eb3ddcafaf93ac1b0974037Glenn Kasten track->mGains[channel] = gain; 420e5bf0d2c9531a7064eb3ddcafaf93ac1b0974037Glenn Kasten } 421e5bf0d2c9531a7064eb3ddcafaf93ac1b0974037Glenn Kasten } 422e5bf0d2c9531a7064eb3ddcafaf93ac1b0974037Glenn Kasten} 423e5bf0d2c9531a7064eb3ddcafaf93ac1b0974037Glenn Kasten 424343c522ebf4f9c321eef8c3b3b2945f1c1cb8846Glenn Kasten 425b7154f2324c8ae44b820c07c69aaa80a4bb9e418Glenn Kasten#endif // USE_OUTPUTMIXEXT 426