From 5d0b852bd60fd54c24316b5bc35d44ca5530b200 Mon Sep 17 00:00:00 2001 From: "Matthias P. Braendli" Date: Wed, 18 Jul 2018 11:04:00 +0200 Subject: Decode AAC to measure audio levels --- src/AACDecoder.h | 53 +++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 53 insertions(+) create mode 100644 src/AACDecoder.h (limited to 'src/AACDecoder.h') diff --git a/src/AACDecoder.h b/src/AACDecoder.h new file mode 100644 index 0000000..7f19cb9 --- /dev/null +++ b/src/AACDecoder.h @@ -0,0 +1,53 @@ +/* ------------------------------------------------------------------ + * Copyright (C) 2011 Martin Storsjo + * Copyright (C) 2017 Matthias P. Braendli + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either + * express or implied. + * See the License for the specific language governing permissions + * and limitations under the License. + * ------------------------------------------------------------------- + */ + +/*! + * \file AACDecoder.h + * \brief Uses FDK-AAC to decode the AAC format for loopback tests and + * to measure the audio level + */ + +#pragma once + +#include +#include +#include + +class AACDecoder { + public: + AACDecoder(); + ~AACDecoder(); + AACDecoder(const AACDecoder&) = delete; + AACDecoder& operator=(const AACDecoder&) = delete; + void decode_frame(uint8_t *data, size_t len); + + struct peak_t { int16_t peak_left; int16_t peak_right; }; + peak_t get_peaks(); + + private: + void decode_au(uint8_t *data, size_t len); + bool m_decoder_set_up = false; + int m_channels = 0; + + peak_t m_peak; + + HANDLE_AACDECODER m_handle; + std::vector m_output_frame; +}; + -- cgit v1.2.3