blob: 8a5aa0c3960c388faf51e8f893d7b69d73f6c7be [file] [log] [blame]
Glenn Kasten01066232012-02-27 11:50:44 -08001/*
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
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 (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
54ssize_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
70} // namespace android