Merge "Cleanup AudioSystem::getInputBufferSize error handling and caching"

DefaultKeyedVector<audio_io_handle_t, AudioSystem::OutputDescriptor *> AudioSystem::gOutputs(0);

// Cached values for recording queries, all protected by gLock

uint32_t AudioSystem::gPrevInSamplingRate = 16000;

audio_format_t AudioSystem::gPrevInFormat = AUDIO_FORMAT_PCM_16_BIT;

audio_channel_mask_t AudioSystem::gPrevInChannelMask = AUDIO_CHANNEL_IN_MONO;

size_t AudioSystem::gInBuffSize = 0;

uint32_t AudioSystem::gPrevInSamplingRate;

audio_format_t AudioSystem::gPrevInFormat;

audio_channel_mask_t AudioSystem::gPrevInChannelMask;

size_t AudioSystem::gInBuffSize = 0;    // zero indicates cache is invalid

// establish binder interface to AudioFlinger service

            return PERMISSION_DENIED;

        }

        inBuffSize = af->getInputBufferSize(sampleRate, format, channelMask);

        if (inBuffSize == 0) {

            ALOGE("AudioSystem::getInputBufferSize failed sampleRate %d format %x channelMask %x",

                    sampleRate, format, channelMask);

            return BAD_VALUE;

        }

        // A benign race is possible here: we could overwrite a fresher cache entry

        gLock.lock();

        // save the request params

        gPrevInSamplingRate = sampleRate;