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125 lines
4.6 KiB
125 lines
4.6 KiB
/*
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* Copyright (C) 2016 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_NDEBUG 0
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#define LOG_TAG "DataConverter"
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#include "include/DataConverter.h"
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#include <audio_utils/primitives.h>
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#include <media/MediaCodecBuffer.h>
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#include <media/stagefright/foundation/ADebug.h>
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#include <media/stagefright/foundation/AUtils.h>
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namespace android {
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status_t DataConverter::convert(const sp<MediaCodecBuffer> &source, sp<MediaCodecBuffer> &target) {
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CHECK(source->base() != target->base());
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size_t size = targetSize(source->size());
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status_t err = OK;
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if (size > target->capacity()) {
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ALOGE("data size (%zu) is greater than buffer capacity (%zu)",
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size, // this is the data received/to be converted
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target->capacity()); // this is out buffer size
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err = FAILED_TRANSACTION;
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} else {
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err = safeConvert(source, target);
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}
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target->setRange(0, err == OK ? size : 0);
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return err;
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}
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status_t DataConverter::safeConvert(
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const sp<MediaCodecBuffer> &source, sp<MediaCodecBuffer> &target) {
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memcpy(target->base(), source->data(), source->size());
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return OK;
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}
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size_t DataConverter::sourceSize(size_t targetSize) {
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return targetSize;
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}
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size_t DataConverter::targetSize(size_t sourceSize) {
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return sourceSize;
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}
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DataConverter::~DataConverter() { }
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size_t SampleConverterBase::sourceSize(size_t targetSize) {
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size_t numSamples = targetSize / mTargetSampleSize;
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if (numSamples > SIZE_MAX / mSourceSampleSize) {
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ALOGW("limiting source size due to overflow (%zu*%zu/%zu)",
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targetSize, mSourceSampleSize, mTargetSampleSize);
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return SIZE_MAX;
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}
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return numSamples * mSourceSampleSize;
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}
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size_t SampleConverterBase::targetSize(size_t sourceSize) {
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// we round up on conversion
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size_t numSamples = divUp(sourceSize, (size_t)mSourceSampleSize);
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if (numSamples > SIZE_MAX / mTargetSampleSize) {
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ALOGW("limiting target size due to overflow (%zu*%zu/%zu)",
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sourceSize, mTargetSampleSize, mSourceSampleSize);
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return SIZE_MAX;
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}
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return numSamples * mTargetSampleSize;
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}
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static size_t getAudioSampleSize(AudioEncoding e) {
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switch (e) {
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case kAudioEncodingPcm16bit: return 2;
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case kAudioEncodingPcm8bit: return 1;
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case kAudioEncodingPcmFloat: return 4;
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default: return 0;
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}
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}
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// static
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AudioConverter* AudioConverter::Create(AudioEncoding source, AudioEncoding target) {
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uint32_t sourceSampleSize = getAudioSampleSize(source);
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uint32_t targetSampleSize = getAudioSampleSize(target);
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if (sourceSampleSize && targetSampleSize && sourceSampleSize != targetSampleSize) {
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return new AudioConverter(source, sourceSampleSize, target, targetSampleSize);
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}
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return NULL;
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}
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status_t AudioConverter::safeConvert(const sp<MediaCodecBuffer> &src, sp<MediaCodecBuffer> &tgt) {
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if (mTo == kAudioEncodingPcm8bit && mFrom == kAudioEncodingPcm16bit) {
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memcpy_to_u8_from_i16((uint8_t*)tgt->base(), (const int16_t*)src->data(), src->size() / 2);
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} else if (mTo == kAudioEncodingPcm8bit && mFrom == kAudioEncodingPcmFloat) {
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memcpy_to_u8_from_float((uint8_t*)tgt->base(), (const float*)src->data(), src->size() / 4);
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} else if (mTo == kAudioEncodingPcm16bit && mFrom == kAudioEncodingPcm8bit) {
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memcpy_to_i16_from_u8((int16_t*)tgt->base(), (const uint8_t*)src->data(), src->size());
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} else if (mTo == kAudioEncodingPcm16bit && mFrom == kAudioEncodingPcmFloat) {
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memcpy_to_i16_from_float((int16_t*)tgt->base(), (const float*)src->data(), src->size() / 4);
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} else if (mTo == kAudioEncodingPcmFloat && mFrom == kAudioEncodingPcm8bit) {
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memcpy_to_float_from_u8((float*)tgt->base(), (const uint8_t*)src->data(), src->size());
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} else if (mTo == kAudioEncodingPcmFloat && mFrom == kAudioEncodingPcm16bit) {
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memcpy_to_float_from_i16((float*)tgt->base(), (const int16_t*)src->data(), src->size() / 2);
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} else {
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return INVALID_OPERATION;
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}
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return OK;
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}
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} // namespace android
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