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