579 status_t AudioMixer::initTrackDownmix(track_t* pTrack, int trackName)  in initTrackDownmix()  argument
583     if (pTrack->channelMask != pTrack->mMixerChannelMask  in initTrackDownmix()
584             && !(pTrack->channelMask == AUDIO_CHANNEL_OUT_MONO  in initTrackDownmix()
585                     && pTrack->mMixerChannelMask == AUDIO_CHANNEL_OUT_STEREO)) {  in initTrackDownmix()
586         return prepareTrackForDownmix(pTrack, trackName);  in initTrackDownmix()
589     unprepareTrackForDownmix(pTrack, trackName);  in initTrackDownmix()
593 void AudioMixer::unprepareTrackForDownmix(track_t* pTrack, int trackName __unused) {  in unprepareTrackForDownmix()  argument
596     if (pTrack->downmixerBufferProvider != NULL) {  in unprepareTrackForDownmix()
599         delete pTrack->downmixerBufferProvider;  in unprepareTrackForDownmix()
600         pTrack->downmixerBufferProvider = NULL;  in unprepareTrackForDownmix()
601         reconfigureBufferProviders(pTrack);  in unprepareTrackForDownmix()
607 status_t AudioMixer::prepareTrackForDownmix(track_t* pTrack, int trackName)  in prepareTrackForDownmix()  argument
609     ALOGV("AudioMixer::prepareTrackForDownmix(%d) with mask 0x%x", trackName, pTrack->channelMask);  in prepareTrackForDownmix()
612     unprepareTrackForDownmix(pTrack, trackName);  in prepareTrackForDownmix()
614         DownmixerBufferProvider* pDbp = new DownmixerBufferProvider(pTrack->channelMask,  in prepareTrackForDownmix()
615                 pTrack->mMixerChannelMask,  in prepareTrackForDownmix()
617                 pTrack->sampleRate, pTrack->sessionId, kCopyBufferFrameCount);  in prepareTrackForDownmix()
620             pTrack->mMixerInFormat = AUDIO_FORMAT_PCM_16_BIT; // PCM 16 bit required for downmix  in prepareTrackForDownmix()
621             pTrack->downmixerBufferProvider = pDbp;  in prepareTrackForDownmix()
622             reconfigureBufferProviders(pTrack);  in prepareTrackForDownmix()
629     RemixBufferProvider* pRbp = new RemixBufferProvider(pTrack->channelMask,  in prepareTrackForDownmix()
630             pTrack->mMixerChannelMask, pTrack->mMixerInFormat, kCopyBufferFrameCount);  in prepareTrackForDownmix()
632     pTrack->downmixerBufferProvider = pRbp;  in prepareTrackForDownmix()
633     reconfigureBufferProviders(pTrack);  in prepareTrackForDownmix()
637 void AudioMixer::unprepareTrackForReformat(track_t* pTrack, int trackName __unused) {  in unprepareTrackForReformat()  argument
639     if (pTrack->mReformatBufferProvider != NULL) {  in unprepareTrackForReformat()
640         delete pTrack->mReformatBufferProvider;  in unprepareTrackForReformat()
641         pTrack->mReformatBufferProvider = NULL;  in unprepareTrackForReformat()
642         reconfigureBufferProviders(pTrack);  in unprepareTrackForReformat()
646 status_t AudioMixer::prepareTrackForReformat(track_t* pTrack, int trackName)  in prepareTrackForReformat()  argument
648     ALOGV("AudioMixer::prepareTrackForReformat(%d) with format %#x", trackName, pTrack->mFormat);  in prepareTrackForReformat()
650     unprepareTrackForReformat(pTrack, trackName);  in prepareTrackForReformat()
652     if (pTrack->mFormat != pTrack->mMixerInFormat) {  in prepareTrackForReformat()
653         pTrack->mReformatBufferProvider = new ReformatBufferProvider(  in prepareTrackForReformat()
654                 audio_channel_count_from_out_mask(pTrack->channelMask),  in prepareTrackForReformat()
655                 pTrack->mFormat, pTrack->mMixerInFormat,  in prepareTrackForReformat()
657         reconfigureBufferProviders(pTrack);  in prepareTrackForReformat()
662 void AudioMixer::reconfigureBufferProviders(track_t* pTrack)  in reconfigureBufferProviders()  argument
664     pTrack->bufferProvider = pTrack->mInputBufferProvider;  in reconfigureBufferProviders()
665     if (pTrack->mReformatBufferProvider) {  in reconfigureBufferProviders()
666         pTrack->mReformatBufferProvider->setBufferProvider(pTrack->bufferProvider);  in reconfigureBufferProviders()
667         pTrack->bufferProvider = pTrack->mReformatBufferProvider;  in reconfigureBufferProviders()
669     if (pTrack->downmixerBufferProvider) {  in reconfigureBufferProviders()
670         pTrack->downmixerBufferProvider->setBufferProvider(pTrack->bufferProvider);  in reconfigureBufferProviders()
671         pTrack->bufferProvider = pTrack->downmixerBufferProvider;  in reconfigureBufferProviders()