AudioStreamOutSink.cpp revision ac3e9db88ddb1f24bc6c8fb744a37dfdeec332bb
1/* 2 * Copyright (C) 2012 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17#define LOG_TAG "AudioStreamOutSink" 18//#define LOG_NDEBUG 0 19 20#include <utils/Log.h> 21#include <media/nbaio/AudioStreamOutSink.h> 22 23namespace android { 24 25AudioStreamOutSink::AudioStreamOutSink(audio_stream_out *stream) : 26 NBAIO_Sink(), 27 mStream(stream), 28 mStreamBufferSizeBytes(0) 29{ 30 ALOG_ASSERT(stream != NULL); 31} 32 33AudioStreamOutSink::~AudioStreamOutSink() 34{ 35} 36 37ssize_t AudioStreamOutSink::negotiate(const NBAIO_Format offers[], size_t numOffers, 38 NBAIO_Format counterOffers[], size_t& numCounterOffers) 39{ 40 if (!Format_isValid(mFormat)) { 41 mStreamBufferSizeBytes = mStream->common.get_buffer_size(&mStream->common); 42 audio_format_t streamFormat = mStream->common.get_format(&mStream->common); 43 if (streamFormat == AUDIO_FORMAT_PCM_16_BIT) { 44 uint32_t sampleRate = mStream->common.get_sample_rate(&mStream->common); 45 audio_channel_mask_t channelMask = 46 (audio_channel_mask_t) mStream->common.get_channels(&mStream->common); 47 mFormat = Format_from_SR_C(sampleRate, popcount(channelMask)); 48 mBitShift = Format_frameBitShift(mFormat); 49 mFrameSize = Format_frameSize(mFormat); 50 } 51 } 52 return NBAIO_Sink::negotiate(offers, numOffers, counterOffers, numCounterOffers); 53} 54 55ssize_t AudioStreamOutSink::write(const void *buffer, size_t count) 56{ 57 if (!mNegotiated) { 58 return NEGOTIATE; 59 } 60 ALOG_ASSERT(Format_isValid(mFormat)); 61 ssize_t ret = mStream->write(mStream, buffer, count << mBitShift); 62 if (ret > 0) { 63 ret >>= mBitShift; 64 mFramesWritten += ret; 65 } else { 66 // FIXME verify HAL implementations are returning the correct error codes e.g. WOULD_BLOCK 67 } 68 return ret; 69} 70 71status_t AudioStreamOutSink::getNextWriteTimestamp(int64_t *timestamp) { 72 ALOG_ASSERT(timestamp != NULL); 73 74 if (NULL == mStream) 75 return INVALID_OPERATION; 76 77 if (NULL == mStream->get_next_write_timestamp) 78 return INVALID_OPERATION; 79 80 return mStream->get_next_write_timestamp(mStream, timestamp); 81} 82 83status_t AudioStreamOutSink::getTimestamp(AudioTimestamp& timestamp) 84{ 85 if (mStream->get_presentation_position == NULL) { 86 return INVALID_OPERATION; 87 } 88 // FIXME position64 won't be needed after AudioTimestamp.mPosition is changed to uint64_t 89 uint64_t position64; 90 int ok = mStream->get_presentation_position(mStream, &position64, ×tamp.mTime); 91 if (ok != 0) { 92 return INVALID_OPERATION; 93 } 94 timestamp.mPosition = position64; 95 return OK; 96} 97 98} // namespace android 99