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 "AudioStreamInSource"
18 //#define LOG_NDEBUG 0
19
20 #include <cutils/compiler.h>
21 #include <utils/Log.h>
22 #include <media/audiohal/StreamHalInterface.h>
23 #include <media/nbaio/AudioStreamInSource.h>
24
25 namespace android {
26
AudioStreamInSource(sp<StreamInHalInterface> stream)27 AudioStreamInSource::AudioStreamInSource(sp<StreamInHalInterface> stream) :
28 NBAIO_Source(),
29 mStream(stream),
30 mStreamBufferSizeBytes(0),
31 mFramesOverrun(0),
32 mOverruns(0)
33 {
34 ALOG_ASSERT(stream != 0);
35 }
36
~AudioStreamInSource()37 AudioStreamInSource::~AudioStreamInSource()
38 {
39 mStream.clear();
40 }
41
negotiate(const NBAIO_Format offers[],size_t numOffers,NBAIO_Format counterOffers[],size_t & numCounterOffers)42 ssize_t AudioStreamInSource::negotiate(const NBAIO_Format offers[], size_t numOffers,
43 NBAIO_Format counterOffers[], size_t& numCounterOffers)
44 {
45 if (!Format_isValid(mFormat)) {
46 status_t result;
47 result = mStream->getBufferSize(&mStreamBufferSizeBytes);
48 if (result != OK) return result;
49 audio_config_base_t config = AUDIO_CONFIG_BASE_INITIALIZER;
50 result = mStream->getAudioProperties(&config);
51 if (result != OK) return result;
52 mFormat = Format_from_SR_C(config.sample_rate,
53 audio_channel_count_from_in_mask(config.channel_mask), config.format);
54 mFrameSize = Format_frameSize(mFormat);
55 }
56 return NBAIO_Source::negotiate(offers, numOffers, counterOffers, numCounterOffers);
57 }
58
framesOverrun()59 int64_t AudioStreamInSource::framesOverrun()
60 {
61 uint32_t framesOverrun;
62 status_t result = mStream->getInputFramesLost(&framesOverrun);
63 if (result == OK && framesOverrun > 0) {
64 mFramesOverrun += framesOverrun;
65 // FIXME only increment for contiguous ranges
66 ++mOverruns;
67 } else if (result != OK) {
68 ALOGE("Error when retrieving lost frames count from HAL: %d", result);
69 }
70 return mFramesOverrun;
71 }
72
read(void * buffer,size_t count)73 ssize_t AudioStreamInSource::read(void *buffer, size_t count)
74 {
75 if (CC_UNLIKELY(!Format_isValid(mFormat))) {
76 return NEGOTIATE;
77 }
78 size_t bytesRead;
79 status_t result = mStream->read(buffer, count * mFrameSize, &bytesRead);
80 if (result == OK && bytesRead > 0) {
81 size_t framesRead = bytesRead / mFrameSize;
82 mFramesRead += framesRead;
83 return framesRead;
84 } else {
85 ALOGE_IF(result != OK, "Error while reading data from HAL: %d", result);
86 return bytesRead;
87 }
88 }
89
90 } // namespace android
91