140 lines
4.8 KiB
C++
140 lines
4.8 KiB
C++
/*
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* Copyright (C) 2022 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#define LOG_TAG "AHAL_DownmixContext"
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#include <android-base/logging.h>
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#include "DownmixContext.h"
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using aidl::android::hardware::audio::effect::IEffect;
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using aidl::android::hardware::audio::common::getChannelCount;
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using aidl::android::media::audio::common::AudioChannelLayout;
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namespace aidl::android::hardware::audio::effect {
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DownmixContext::DownmixContext(int statusDepth, const Parameter::Common& common)
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: EffectContext(statusDepth, common) {
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LOG(DEBUG) << __func__;
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mState = DOWNMIX_STATE_UNINITIALIZED;
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init_params(common);
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}
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DownmixContext::~DownmixContext() {
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LOG(DEBUG) << __func__;
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mState = DOWNMIX_STATE_UNINITIALIZED;
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}
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RetCode DownmixContext::enable() {
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LOG(DEBUG) << __func__;
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if (mState != DOWNMIX_STATE_INITIALIZED) {
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return RetCode::ERROR_EFFECT_LIB_ERROR;
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}
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mState = DOWNMIX_STATE_ACTIVE;
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return RetCode::SUCCESS;
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}
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RetCode DownmixContext::disable() {
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LOG(DEBUG) << __func__;
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if (mState != DOWNMIX_STATE_ACTIVE) {
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return RetCode::ERROR_EFFECT_LIB_ERROR;
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}
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mState = DOWNMIX_STATE_INITIALIZED;
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return RetCode::SUCCESS;
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}
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void DownmixContext::reset() {
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LOG(DEBUG) << __func__;
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disable();
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resetBuffer();
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}
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IEffect::Status DownmixContext::lvmProcess(float* in, float* out, int samples) {
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LOG(DEBUG) << __func__ << " in " << in << " out " << out << " sample " << samples;
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IEffect::Status status = {EX_ILLEGAL_ARGUMENT, 0, 0};
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if (in == nullptr || out == nullptr || getInputFrameSize() != getOutputFrameSize() ||
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getInputFrameSize() == 0) {
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return status;
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}
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status = {EX_ILLEGAL_STATE, 0, 0};
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if (mState == DOWNMIX_STATE_UNINITIALIZED) {
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LOG(ERROR) << __func__ << "Trying to use an uninitialized downmixer";
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return status;
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} else if (mState == DOWNMIX_STATE_INITIALIZED) {
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LOG(ERROR) << __func__ << "Trying to use a non-configured downmixer";
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return status;
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}
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LOG(DEBUG) << __func__ << " start processing";
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bool accumulate = false;
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int frames = samples * sizeof(float) / getInputFrameSize();
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if (mType == Downmix::Type::STRIP) {
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int inputChannelCount = getChannelCount(mChMask);
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while (frames) {
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if (accumulate) {
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out[0] = std::clamp(out[0] + in[0], -1.f, 1.f);
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out[1] = std::clamp(out[1] + in[1], -1.f, 1.f);
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} else {
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out[0] = in[0];
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out[1] = in[1];
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}
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in += inputChannelCount;
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out += 2;
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frames--;
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}
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} else {
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int chMask = mChMask.get<AudioChannelLayout::layoutMask>();
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if (!mChannelMix.process(in, out, frames, accumulate, (audio_channel_mask_t)chMask)) {
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LOG(ERROR) << "Multichannel configuration " << mChMask.toString()
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<< " is not supported";
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return status;
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}
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}
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LOG(DEBUG) << __func__ << " done processing";
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return {STATUS_OK, samples, samples};
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}
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void DownmixContext::init_params(const Parameter::Common& common) {
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// when configuring the effect, do not allow a blank or unsupported channel mask
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AudioChannelLayout channelMask = common.input.base.channelMask;
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if (isChannelMaskValid(channelMask)) {
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LOG(ERROR) << "Downmix_Configure error: input channel mask " << channelMask.toString()
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<< " not supported";
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} else {
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mType = Downmix::Type::FOLD;
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mChMask = channelMask;
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mState = DOWNMIX_STATE_INITIALIZED;
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}
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}
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bool DownmixContext::isChannelMaskValid(AudioChannelLayout channelMask) {
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if (channelMask.getTag() == AudioChannelLayout::layoutMask) return false;
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int chMask = channelMask.get<AudioChannelLayout::layoutMask>();
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// check against unsupported channels (up to FCC_26)
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constexpr uint32_t MAXIMUM_CHANNEL_MASK = AudioChannelLayout::LAYOUT_22POINT2 |
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AudioChannelLayout::CHANNEL_FRONT_WIDE_LEFT |
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AudioChannelLayout::CHANNEL_FRONT_WIDE_RIGHT;
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if (chMask & ~MAXIMUM_CHANNEL_MASK) {
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LOG(ERROR) << "Unsupported channels in " << (chMask & ~MAXIMUM_CHANNEL_MASK);
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return false;
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}
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return true;
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}
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} // namespace aidl::android::hardware::audio::effect
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