| /* |
| * Copyright (C) 2012 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #define LOG_TAG "AudioStreamInSource" |
| //#define LOG_NDEBUG 0 |
| |
| #include <cutils/compiler.h> |
| #include <utils/Log.h> |
| #include <media/nbaio/AudioStreamInSource.h> |
| |
| namespace android { |
| |
| AudioStreamInSource::AudioStreamInSource(audio_stream_in *stream) : |
| NBAIO_Source(), |
| mStream(stream), |
| mStreamBufferSizeBytes(0), |
| mFramesOverrun(0), |
| mOverruns(0) |
| { |
| ALOG_ASSERT(stream != NULL); |
| } |
| |
| AudioStreamInSource::~AudioStreamInSource() |
| { |
| } |
| |
| ssize_t AudioStreamInSource::negotiate(const NBAIO_Format offers[], size_t numOffers, |
| NBAIO_Format counterOffers[], size_t& numCounterOffers) |
| { |
| if (!Format_isValid(mFormat)) { |
| mStreamBufferSizeBytes = mStream->common.get_buffer_size(&mStream->common); |
| audio_format_t streamFormat = mStream->common.get_format(&mStream->common); |
| uint32_t sampleRate = mStream->common.get_sample_rate(&mStream->common); |
| audio_channel_mask_t channelMask = |
| (audio_channel_mask_t) mStream->common.get_channels(&mStream->common); |
| mFormat = Format_from_SR_C(sampleRate, |
| audio_channel_count_from_in_mask(channelMask), streamFormat); |
| mFrameSize = Format_frameSize(mFormat); |
| } |
| return NBAIO_Source::negotiate(offers, numOffers, counterOffers, numCounterOffers); |
| } |
| |
| int64_t AudioStreamInSource::framesOverrun() |
| { |
| uint32_t framesOverrun = mStream->get_input_frames_lost(mStream); |
| if (framesOverrun > 0) { |
| mFramesOverrun += framesOverrun; |
| // FIXME only increment for contiguous ranges |
| ++mOverruns; |
| } |
| return mFramesOverrun; |
| } |
| |
| ssize_t AudioStreamInSource::read(void *buffer, size_t count) |
| { |
| if (CC_UNLIKELY(!Format_isValid(mFormat))) { |
| return NEGOTIATE; |
| } |
| ssize_t bytesRead = mStream->read(mStream, buffer, count * mFrameSize); |
| if (bytesRead > 0) { |
| size_t framesRead = bytesRead / mFrameSize; |
| mFramesRead += framesRead; |
| return framesRead; |
| } else { |
| return bytesRead; |
| } |
| } |
| |
| } // namespace android |