1*4d7e907cSAndroid Build Coastguard Worker /*
2*4d7e907cSAndroid Build Coastguard Worker * Copyright (C) 2023 The Android Open Source Project
3*4d7e907cSAndroid Build Coastguard Worker *
4*4d7e907cSAndroid Build Coastguard Worker * Licensed under the Apache License, Version 2.0 (the "License");
5*4d7e907cSAndroid Build Coastguard Worker * you may not use this file except in compliance with the License.
6*4d7e907cSAndroid Build Coastguard Worker * You may obtain a copy of the License at
7*4d7e907cSAndroid Build Coastguard Worker *
8*4d7e907cSAndroid Build Coastguard Worker * http://www.apache.org/licenses/LICENSE-2.0
9*4d7e907cSAndroid Build Coastguard Worker *
10*4d7e907cSAndroid Build Coastguard Worker * Unless required by applicable law or agreed to in writing, software
11*4d7e907cSAndroid Build Coastguard Worker * distributed under the License is distributed on an "AS IS" BASIS,
12*4d7e907cSAndroid Build Coastguard Worker * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13*4d7e907cSAndroid Build Coastguard Worker * See the License for the specific language governing permissions and
14*4d7e907cSAndroid Build Coastguard Worker * limitations under the License.
15*4d7e907cSAndroid Build Coastguard Worker */
16*4d7e907cSAndroid Build Coastguard Worker
17*4d7e907cSAndroid Build Coastguard Worker #include <cmath>
18*4d7e907cSAndroid Build Coastguard Worker #include <limits>
19*4d7e907cSAndroid Build Coastguard Worker
20*4d7e907cSAndroid Build Coastguard Worker #define LOG_TAG "AHAL_StreamAlsa"
21*4d7e907cSAndroid Build Coastguard Worker #include <android-base/logging.h>
22*4d7e907cSAndroid Build Coastguard Worker
23*4d7e907cSAndroid Build Coastguard Worker #include <Utils.h>
24*4d7e907cSAndroid Build Coastguard Worker #include <audio_utils/clock.h>
25*4d7e907cSAndroid Build Coastguard Worker #include <error/expected_utils.h>
26*4d7e907cSAndroid Build Coastguard Worker
27*4d7e907cSAndroid Build Coastguard Worker #include "core-impl/StreamAlsa.h"
28*4d7e907cSAndroid Build Coastguard Worker
29*4d7e907cSAndroid Build Coastguard Worker namespace aidl::android::hardware::audio::core {
30*4d7e907cSAndroid Build Coastguard Worker
StreamAlsa(StreamContext * context,const Metadata & metadata,int readWriteRetries)31*4d7e907cSAndroid Build Coastguard Worker StreamAlsa::StreamAlsa(StreamContext* context, const Metadata& metadata, int readWriteRetries)
32*4d7e907cSAndroid Build Coastguard Worker : StreamCommonImpl(context, metadata),
33*4d7e907cSAndroid Build Coastguard Worker mBufferSizeFrames(getContext().getBufferSizeInFrames()),
34*4d7e907cSAndroid Build Coastguard Worker mFrameSizeBytes(getContext().getFrameSize()),
35*4d7e907cSAndroid Build Coastguard Worker mSampleRate(getContext().getSampleRate()),
36*4d7e907cSAndroid Build Coastguard Worker mIsInput(isInput(metadata)),
37*4d7e907cSAndroid Build Coastguard Worker mConfig(alsa::getPcmConfig(getContext(), mIsInput)),
38*4d7e907cSAndroid Build Coastguard Worker mReadWriteRetries(readWriteRetries) {}
39*4d7e907cSAndroid Build Coastguard Worker
~StreamAlsa()40*4d7e907cSAndroid Build Coastguard Worker StreamAlsa::~StreamAlsa() {
41*4d7e907cSAndroid Build Coastguard Worker cleanupWorker();
42*4d7e907cSAndroid Build Coastguard Worker }
43*4d7e907cSAndroid Build Coastguard Worker
init()44*4d7e907cSAndroid Build Coastguard Worker ::android::status_t StreamAlsa::init() {
45*4d7e907cSAndroid Build Coastguard Worker return mConfig.has_value() ? ::android::OK : ::android::NO_INIT;
46*4d7e907cSAndroid Build Coastguard Worker }
47*4d7e907cSAndroid Build Coastguard Worker
drain(StreamDescriptor::DrainMode)48*4d7e907cSAndroid Build Coastguard Worker ::android::status_t StreamAlsa::drain(StreamDescriptor::DrainMode) {
49*4d7e907cSAndroid Build Coastguard Worker if (!mIsInput) {
50*4d7e907cSAndroid Build Coastguard Worker static constexpr float kMicrosPerSecond = MICROS_PER_SECOND;
51*4d7e907cSAndroid Build Coastguard Worker const size_t delayUs = static_cast<size_t>(
52*4d7e907cSAndroid Build Coastguard Worker std::roundf(mBufferSizeFrames * kMicrosPerSecond / mSampleRate));
53*4d7e907cSAndroid Build Coastguard Worker usleep(delayUs);
54*4d7e907cSAndroid Build Coastguard Worker }
55*4d7e907cSAndroid Build Coastguard Worker return ::android::OK;
56*4d7e907cSAndroid Build Coastguard Worker }
57*4d7e907cSAndroid Build Coastguard Worker
flush()58*4d7e907cSAndroid Build Coastguard Worker ::android::status_t StreamAlsa::flush() {
59*4d7e907cSAndroid Build Coastguard Worker return ::android::OK;
60*4d7e907cSAndroid Build Coastguard Worker }
61*4d7e907cSAndroid Build Coastguard Worker
pause()62*4d7e907cSAndroid Build Coastguard Worker ::android::status_t StreamAlsa::pause() {
63*4d7e907cSAndroid Build Coastguard Worker return ::android::OK;
64*4d7e907cSAndroid Build Coastguard Worker }
65*4d7e907cSAndroid Build Coastguard Worker
standby()66*4d7e907cSAndroid Build Coastguard Worker ::android::status_t StreamAlsa::standby() {
67*4d7e907cSAndroid Build Coastguard Worker mAlsaDeviceProxies.clear();
68*4d7e907cSAndroid Build Coastguard Worker return ::android::OK;
69*4d7e907cSAndroid Build Coastguard Worker }
70*4d7e907cSAndroid Build Coastguard Worker
start()71*4d7e907cSAndroid Build Coastguard Worker ::android::status_t StreamAlsa::start() {
72*4d7e907cSAndroid Build Coastguard Worker if (!mAlsaDeviceProxies.empty()) {
73*4d7e907cSAndroid Build Coastguard Worker // This is a resume after a pause.
74*4d7e907cSAndroid Build Coastguard Worker return ::android::OK;
75*4d7e907cSAndroid Build Coastguard Worker }
76*4d7e907cSAndroid Build Coastguard Worker decltype(mAlsaDeviceProxies) alsaDeviceProxies;
77*4d7e907cSAndroid Build Coastguard Worker for (const auto& device : getDeviceProfiles()) {
78*4d7e907cSAndroid Build Coastguard Worker if ((device.direction == PCM_OUT && mIsInput) ||
79*4d7e907cSAndroid Build Coastguard Worker (device.direction == PCM_IN && !mIsInput)) {
80*4d7e907cSAndroid Build Coastguard Worker continue;
81*4d7e907cSAndroid Build Coastguard Worker }
82*4d7e907cSAndroid Build Coastguard Worker alsa::DeviceProxy proxy;
83*4d7e907cSAndroid Build Coastguard Worker if (device.isExternal) {
84*4d7e907cSAndroid Build Coastguard Worker // Always ask alsa configure as required since the configuration should be supported
85*4d7e907cSAndroid Build Coastguard Worker // by the connected device. That is guaranteed by `setAudioPortConfig` and
86*4d7e907cSAndroid Build Coastguard Worker // `setAudioPatch`.
87*4d7e907cSAndroid Build Coastguard Worker proxy = alsa::openProxyForExternalDevice(
88*4d7e907cSAndroid Build Coastguard Worker device, const_cast<struct pcm_config*>(&mConfig.value()),
89*4d7e907cSAndroid Build Coastguard Worker true /*require_exact_match*/);
90*4d7e907cSAndroid Build Coastguard Worker } else {
91*4d7e907cSAndroid Build Coastguard Worker proxy = alsa::openProxyForAttachedDevice(
92*4d7e907cSAndroid Build Coastguard Worker device, const_cast<struct pcm_config*>(&mConfig.value()), mBufferSizeFrames);
93*4d7e907cSAndroid Build Coastguard Worker }
94*4d7e907cSAndroid Build Coastguard Worker if (proxy.get() == nullptr) {
95*4d7e907cSAndroid Build Coastguard Worker return ::android::NO_INIT;
96*4d7e907cSAndroid Build Coastguard Worker }
97*4d7e907cSAndroid Build Coastguard Worker alsaDeviceProxies.push_back(std::move(proxy));
98*4d7e907cSAndroid Build Coastguard Worker }
99*4d7e907cSAndroid Build Coastguard Worker if (alsaDeviceProxies.empty()) {
100*4d7e907cSAndroid Build Coastguard Worker return ::android::NO_INIT;
101*4d7e907cSAndroid Build Coastguard Worker }
102*4d7e907cSAndroid Build Coastguard Worker mAlsaDeviceProxies = std::move(alsaDeviceProxies);
103*4d7e907cSAndroid Build Coastguard Worker return ::android::OK;
104*4d7e907cSAndroid Build Coastguard Worker }
105*4d7e907cSAndroid Build Coastguard Worker
transfer(void * buffer,size_t frameCount,size_t * actualFrameCount,int32_t * latencyMs)106*4d7e907cSAndroid Build Coastguard Worker ::android::status_t StreamAlsa::transfer(void* buffer, size_t frameCount, size_t* actualFrameCount,
107*4d7e907cSAndroid Build Coastguard Worker int32_t* latencyMs) {
108*4d7e907cSAndroid Build Coastguard Worker if (mAlsaDeviceProxies.empty()) {
109*4d7e907cSAndroid Build Coastguard Worker LOG(FATAL) << __func__ << ": no opened devices";
110*4d7e907cSAndroid Build Coastguard Worker return ::android::NO_INIT;
111*4d7e907cSAndroid Build Coastguard Worker }
112*4d7e907cSAndroid Build Coastguard Worker const size_t bytesToTransfer = frameCount * mFrameSizeBytes;
113*4d7e907cSAndroid Build Coastguard Worker unsigned maxLatency = 0;
114*4d7e907cSAndroid Build Coastguard Worker if (mIsInput) {
115*4d7e907cSAndroid Build Coastguard Worker // For input case, only support single device.
116*4d7e907cSAndroid Build Coastguard Worker proxy_read_with_retries(mAlsaDeviceProxies[0].get(), buffer, bytesToTransfer,
117*4d7e907cSAndroid Build Coastguard Worker mReadWriteRetries);
118*4d7e907cSAndroid Build Coastguard Worker maxLatency = proxy_get_latency(mAlsaDeviceProxies[0].get());
119*4d7e907cSAndroid Build Coastguard Worker } else {
120*4d7e907cSAndroid Build Coastguard Worker alsa::applyGain(buffer, mGain, bytesToTransfer, mConfig.value().format, mConfig->channels);
121*4d7e907cSAndroid Build Coastguard Worker for (auto& proxy : mAlsaDeviceProxies) {
122*4d7e907cSAndroid Build Coastguard Worker proxy_write_with_retries(proxy.get(), buffer, bytesToTransfer, mReadWriteRetries);
123*4d7e907cSAndroid Build Coastguard Worker maxLatency = std::max(maxLatency, proxy_get_latency(proxy.get()));
124*4d7e907cSAndroid Build Coastguard Worker }
125*4d7e907cSAndroid Build Coastguard Worker }
126*4d7e907cSAndroid Build Coastguard Worker *actualFrameCount = frameCount;
127*4d7e907cSAndroid Build Coastguard Worker maxLatency = std::min(maxLatency, static_cast<unsigned>(std::numeric_limits<int32_t>::max()));
128*4d7e907cSAndroid Build Coastguard Worker *latencyMs = maxLatency;
129*4d7e907cSAndroid Build Coastguard Worker return ::android::OK;
130*4d7e907cSAndroid Build Coastguard Worker }
131*4d7e907cSAndroid Build Coastguard Worker
refinePosition(StreamDescriptor::Position * position)132*4d7e907cSAndroid Build Coastguard Worker ::android::status_t StreamAlsa::refinePosition(StreamDescriptor::Position* position) {
133*4d7e907cSAndroid Build Coastguard Worker if (mAlsaDeviceProxies.empty()) {
134*4d7e907cSAndroid Build Coastguard Worker LOG(WARNING) << __func__ << ": no opened devices";
135*4d7e907cSAndroid Build Coastguard Worker return ::android::NO_INIT;
136*4d7e907cSAndroid Build Coastguard Worker }
137*4d7e907cSAndroid Build Coastguard Worker // Since the proxy can only count transferred frames since its creation,
138*4d7e907cSAndroid Build Coastguard Worker // we override its counter value with ours and let it to correct for buffered frames.
139*4d7e907cSAndroid Build Coastguard Worker alsa::resetTransferredFrames(mAlsaDeviceProxies[0], position->frames);
140*4d7e907cSAndroid Build Coastguard Worker if (mIsInput) {
141*4d7e907cSAndroid Build Coastguard Worker if (int ret = proxy_get_capture_position(mAlsaDeviceProxies[0].get(), &position->frames,
142*4d7e907cSAndroid Build Coastguard Worker &position->timeNs);
143*4d7e907cSAndroid Build Coastguard Worker ret != 0) {
144*4d7e907cSAndroid Build Coastguard Worker LOG(WARNING) << __func__ << ": failed to retrieve capture position: " << ret;
145*4d7e907cSAndroid Build Coastguard Worker return ::android::INVALID_OPERATION;
146*4d7e907cSAndroid Build Coastguard Worker }
147*4d7e907cSAndroid Build Coastguard Worker } else {
148*4d7e907cSAndroid Build Coastguard Worker uint64_t hwFrames;
149*4d7e907cSAndroid Build Coastguard Worker struct timespec timestamp;
150*4d7e907cSAndroid Build Coastguard Worker if (int ret = proxy_get_presentation_position(mAlsaDeviceProxies[0].get(), &hwFrames,
151*4d7e907cSAndroid Build Coastguard Worker ×tamp);
152*4d7e907cSAndroid Build Coastguard Worker ret == 0) {
153*4d7e907cSAndroid Build Coastguard Worker if (hwFrames > std::numeric_limits<int64_t>::max()) {
154*4d7e907cSAndroid Build Coastguard Worker hwFrames -= std::numeric_limits<int64_t>::max();
155*4d7e907cSAndroid Build Coastguard Worker }
156*4d7e907cSAndroid Build Coastguard Worker position->frames = static_cast<int64_t>(hwFrames);
157*4d7e907cSAndroid Build Coastguard Worker position->timeNs = audio_utils_ns_from_timespec(×tamp);
158*4d7e907cSAndroid Build Coastguard Worker } else {
159*4d7e907cSAndroid Build Coastguard Worker LOG(WARNING) << __func__ << ": failed to retrieve presentation position: " << ret;
160*4d7e907cSAndroid Build Coastguard Worker return ::android::INVALID_OPERATION;
161*4d7e907cSAndroid Build Coastguard Worker }
162*4d7e907cSAndroid Build Coastguard Worker }
163*4d7e907cSAndroid Build Coastguard Worker return ::android::OK;
164*4d7e907cSAndroid Build Coastguard Worker }
165*4d7e907cSAndroid Build Coastguard Worker
shutdown()166*4d7e907cSAndroid Build Coastguard Worker void StreamAlsa::shutdown() {
167*4d7e907cSAndroid Build Coastguard Worker mAlsaDeviceProxies.clear();
168*4d7e907cSAndroid Build Coastguard Worker }
169*4d7e907cSAndroid Build Coastguard Worker
setGain(float gain)170*4d7e907cSAndroid Build Coastguard Worker ndk::ScopedAStatus StreamAlsa::setGain(float gain) {
171*4d7e907cSAndroid Build Coastguard Worker mGain = gain;
172*4d7e907cSAndroid Build Coastguard Worker return ndk::ScopedAStatus::ok();
173*4d7e907cSAndroid Build Coastguard Worker }
174*4d7e907cSAndroid Build Coastguard Worker
175*4d7e907cSAndroid Build Coastguard Worker } // namespace aidl::android::hardware::audio::core
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