blob: 6f525e5ded5dbb72a35190d29df642344f063ea8 [file] [log] [blame]
/*
* 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 "AudioStreamOutSink"
//#define LOG_NDEBUG 0
#include <utils/Log.h>
#include <media/nbaio/AudioStreamOutSink.h>
namespace android {
AudioStreamOutSink::AudioStreamOutSink(audio_stream_out *stream) :
NBAIO_Sink(),
mStream(stream),
mStreamBufferSizeBytes(0)
{
ALOG_ASSERT(stream != NULL);
}
AudioStreamOutSink::~AudioStreamOutSink()
{
}
ssize_t AudioStreamOutSink::negotiate(const NBAIO_Format offers[], size_t numOffers,
NBAIO_Format counterOffers[], size_t& numCounterOffers)
{
if (mFormat == Format_Invalid) {
mStreamBufferSizeBytes = mStream->common.get_buffer_size(&mStream->common);
audio_format_t streamFormat = mStream->common.get_format(&mStream->common);
if (streamFormat == AUDIO_FORMAT_PCM_16_BIT) {
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, popcount(channelMask));
mBitShift = Format_frameBitShift(mFormat);
}
}
return NBAIO_Sink::negotiate(offers, numOffers, counterOffers, numCounterOffers);
}
ssize_t AudioStreamOutSink::write(const void *buffer, size_t count)
{
if (!mNegotiated) {
return NEGOTIATE;
}
ALOG_ASSERT(mFormat != Format_Invalid);
ssize_t ret = mStream->write(mStream, buffer, count << mBitShift);
if (ret > 0) {
ret >>= mBitShift;
mFramesWritten += ret;
} else {
// FIXME verify HAL implementations are returning the correct error codes e.g. WOULD_BLOCK
}
return ret;
}
status_t AudioStreamOutSink::getNextWriteTimestamp(int64_t *timestamp) {
ALOG_ASSERT(timestamp != NULL);
if (NULL == mStream)
return INVALID_OPERATION;
if (NULL == mStream->get_next_write_timestamp)
return INVALID_OPERATION;
return mStream->get_next_write_timestamp(mStream, timestamp);
}
} // namespace android