1 /*
2 * Copyright (C) 2017 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 #include "chre/platform/platform_audio.h"
18
19 #include <cinttypes>
20
21 #include "chre/core/event_loop_manager.h"
22 #include "chre/platform/fatal_error.h"
23 #include "chre/platform/log.h"
24 #include "chre/platform/system_time.h"
25 #include "chre/util/dynamic_vector.h"
26
27 namespace chre {
28 namespace {
29
30 //! The list of audio sources provided by the simulator.
31 DynamicVector<UniquePtr<AudioSource>> gAudioSources;
32
33 } // namespace
34
PlatformAudio()35 PlatformAudio::PlatformAudio() {}
36
~PlatformAudio()37 PlatformAudio::~PlatformAudio() {}
38
init()39 void PlatformAudio::init() {
40 // TODO: Implement this.
41 }
42
audioSourceCallback(void * cookie)43 void audioSourceCallback(void *cookie) {
44 auto *audioSource = static_cast<AudioSource *>(cookie);
45
46 auto &dataEvent = audioSource->dataEvent;
47 Nanoseconds samplingTime =
48 AudioRequestManager::getDurationFromSampleCountAndRate(
49 audioSource->numSamples,
50 static_cast<uint32_t>(audioSource->audioInfo.samplerate));
51 dataEvent.timestamp =
52 (SystemTime::getMonotonicTime() - samplingTime).toRawNanoseconds();
53 dataEvent.sampleCount = audioSource->numSamples;
54
55 if (dataEvent.format == CHRE_AUDIO_DATA_FORMAT_16_BIT_SIGNED_PCM) {
56 uint32_t intervalNumSamples =
57 AudioRequestManager::getSampleCountFromRateAndDuration(
58 static_cast<uint32_t>(audioSource->audioInfo.samplerate),
59 audioSource->eventDelay);
60 if (intervalNumSamples > audioSource->numSamples) {
61 sf_count_t seekAmount = intervalNumSamples - audioSource->numSamples;
62 sf_seek(audioSource->audioFile, -seekAmount, SEEK_CUR);
63 }
64
65 sf_count_t readCount = sf_read_short(
66 audioSource->audioFile, const_cast<int16_t *>(dataEvent.samplesS16),
67 static_cast<sf_count_t>(dataEvent.sampleCount));
68 if (readCount != dataEvent.sampleCount) {
69 LOGI("TODO: File done, suspend the source");
70 } else {
71 EventLoopManagerSingleton::get()
72 ->getAudioRequestManager()
73 .handleAudioDataEvent(&audioSource->dataEvent);
74 }
75 } else {
76 FATAL_ERROR("Unimplemented data format");
77 }
78 }
79
setHandleEnabled(uint32_t handle,bool enabled)80 void PlatformAudio::setHandleEnabled(uint32_t handle, bool enabled) {
81 // TODO: Implement this.
82 }
83
requestAudioDataEvent(uint32_t handle,uint32_t numSamples,Nanoseconds eventDelay)84 bool PlatformAudio::requestAudioDataEvent(uint32_t handle, uint32_t numSamples,
85 Nanoseconds eventDelay) {
86 LOGD("Request for audio data made for handle %" PRIu32 " with %" PRIu32
87 " samples and %" PRIu64 " delivery interval",
88 handle, numSamples, eventDelay.toRawNanoseconds());
89 auto &source = gAudioSources[handle];
90 source->numSamples = numSamples;
91 source->eventDelay = eventDelay;
92 return source->timer.set(audioSourceCallback, source.get(), eventDelay);
93 }
94
cancelAudioDataEventRequest(uint32_t handle)95 void PlatformAudio::cancelAudioDataEventRequest(uint32_t handle) {
96 LOGD("Cancelling audio request for handle %" PRIu32, handle);
97 auto &source = gAudioSources[handle];
98 source->timer.cancel();
99 }
100
releaseAudioDataEvent(struct chreAudioDataEvent * event)101 void PlatformAudio::releaseAudioDataEvent(struct chreAudioDataEvent *event) {
102 // TODO(P1-41459d): Implement this API in terms of libsndfile.
103 }
104
getSourceCount()105 size_t PlatformAudio::getSourceCount() {
106 return gAudioSources.size();
107 }
108
getAudioSource(uint32_t handle,chreAudioSource * audioSource) const109 bool PlatformAudio::getAudioSource(uint32_t handle,
110 chreAudioSource *audioSource) const {
111 bool success = (handle < gAudioSources.size());
112 if (success) {
113 const auto &source = gAudioSources[handle];
114 // TODO(P1-b9ff35): Ensure that name never exceeds 40 bytes in length.
115 audioSource->name = source->audioFilename.c_str();
116 audioSource->sampleRate =
117 static_cast<uint32_t>(source->audioInfo.samplerate);
118 audioSource->minBufferDuration =
119 source->minBufferDuration.toRawNanoseconds();
120 audioSource->maxBufferDuration =
121 source->maxBufferDuration.toRawNanoseconds();
122 audioSource->format = source->dataEvent.format;
123 }
124
125 return success;
126 }
127
addAudioSource(UniquePtr<AudioSource> & source)128 void PlatformAudioBase::addAudioSource(UniquePtr<AudioSource> &source) {
129 LOGI("Adding audio source - filename: %s, min buf size: %" PRIu64
130 "ms, max buf size: %" PRIu64 "ms",
131 source->audioFilename.c_str(),
132 Milliseconds(source->minBufferDuration).getMilliseconds(),
133 Milliseconds(source->maxBufferDuration).getMilliseconds());
134 auto &audioInfo = source->audioInfo;
135 source->audioFile =
136 sf_open(source->audioFilename.c_str(), SFM_READ, &audioInfo);
137 auto sampleCount = AudioRequestManager::getSampleCountFromRateAndDuration(
138 static_cast<uint32_t>(source->audioInfo.samplerate),
139 source->maxBufferDuration);
140 if (source->audioFile == nullptr) {
141 FATAL_ERROR("Failed to open provided audio file %s",
142 source->audioFilename.c_str());
143 } else if ((audioInfo.format & SF_FORMAT_ULAW) == SF_FORMAT_ULAW) {
144 source->dataEvent.format = CHRE_AUDIO_DATA_FORMAT_8_BIT_U_LAW;
145 source->dataEvent.samplesULaw8 =
146 static_cast<uint8_t *>(malloc(sizeof(uint8_t) * sampleCount));
147 } else if ((audioInfo.format & SF_FORMAT_PCM_16) == SF_FORMAT_PCM_16) {
148 source->dataEvent.format = CHRE_AUDIO_DATA_FORMAT_16_BIT_SIGNED_PCM;
149 source->dataEvent.samplesS16 =
150 static_cast<int16_t *>(malloc(sizeof(uint16_t) * sampleCount));
151 } else {
152 FATAL_ERROR("Invalid format 0x%08x", audioInfo.format);
153 }
154
155 source->dataEvent.version = CHRE_AUDIO_DATA_EVENT_VERSION;
156 memset(source->dataEvent.reserved, 0, sizeof(source->dataEvent.reserved));
157 source->dataEvent.handle = static_cast<uint32_t>(gAudioSources.size());
158 source->dataEvent.sampleRate =
159 static_cast<uint32_t>(source->audioInfo.samplerate);
160 gAudioSources.push_back(std::move(source));
161 }
162
163 } // namespace chre
164