Glenn Kasten | 0106623 | 2012-02-27 11:50:44 -0800 | [diff] [blame] | 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 "AudioStreamOutSink.h" |
| 22 | |
| 23 | namespace android { |
| 24 | |
| 25 | AudioStreamOutSink::AudioStreamOutSink(audio_stream_out *stream) : |
| 26 | NBAIO_Sink(), |
| 27 | mStream(stream), |
| 28 | mStreamBufferSizeBytes(0) |
| 29 | { |
| 30 | ALOG_ASSERT(stream != NULL); |
| 31 | } |
| 32 | |
| 33 | AudioStreamOutSink::~AudioStreamOutSink() |
| 34 | { |
| 35 | } |
| 36 | |
| 37 | ssize_t AudioStreamOutSink::negotiate(const NBAIO_Format offers[], size_t numOffers, |
| 38 | NBAIO_Format counterOffers[], size_t& numCounterOffers) |
| 39 | { |
| 40 | if (mFormat == Format_Invalid) { |
| 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 | } |
| 50 | } |
| 51 | return NBAIO_Sink::negotiate(offers, numOffers, counterOffers, numCounterOffers); |
| 52 | } |
| 53 | |
| 54 | ssize_t AudioStreamOutSink::write(const void *buffer, size_t count) |
| 55 | { |
| 56 | if (!mNegotiated) { |
| 57 | return NEGOTIATE; |
| 58 | } |
| 59 | ALOG_ASSERT(mFormat != Format_Invalid); |
| 60 | ssize_t ret = mStream->write(mStream, buffer, count << mBitShift); |
| 61 | if (ret > 0) { |
| 62 | ret >>= mBitShift; |
| 63 | mFramesWritten += ret; |
| 64 | } else { |
| 65 | // FIXME verify HAL implementations are returning the correct error codes e.g. WOULD_BLOCK |
| 66 | } |
| 67 | return ret; |
| 68 | } |
| 69 | |
John Grossman | 2c3b2da | 2012-08-02 17:08:54 -0700 | [diff] [blame^] | 70 | status_t AudioStreamOutSink::getNextWriteTimestamp(int64_t *timestamp) { |
| 71 | ALOG_ASSERT(timestamp != NULL); |
| 72 | |
| 73 | if (NULL == mStream) |
| 74 | return INVALID_OPERATION; |
| 75 | |
| 76 | if (NULL == mStream->get_next_write_timestamp) |
| 77 | return INVALID_OPERATION; |
| 78 | |
| 79 | return mStream->get_next_write_timestamp(mStream, timestamp); |
| 80 | } |
| 81 | |
Glenn Kasten | 0106623 | 2012-02-27 11:50:44 -0800 | [diff] [blame] | 82 | } // namespace android |