93 lines
2.7 KiB
C++
93 lines
2.7 KiB
C++
/*
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* Copyright (C) 2012 Open Source Robotics Foundation
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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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*/
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#ifndef _GAZEBO_AUDIO_DECODER_HH_
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#define _GAZEBO_AUDIO_DECODER_HH_
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#include <stdint.h>
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#include <string>
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#include "gazebo/util/system.hh"
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struct AVFormatContext;
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struct AVCodecContext;
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struct AVCodec;
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namespace gazebo
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{
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namespace common
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{
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/// \addtogroup gazebo_common Common
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/// \brief Classes and functions used by multiple modules.
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/// \{
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/// \class AudioDecoder AudioDecoder.hh common/common.hh
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/// \brief An audio decoder based on FFMPEG.
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class GZ_COMMON_VISIBLE AudioDecoder
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{
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/// \brief Constructor.
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public: AudioDecoder();
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/// \brief Destructor.
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public: virtual ~AudioDecoder();
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/// \brief Set the file to decode.
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/// \param[in] _filename Path to an audio file.
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/// \return True if the file was successfull opened.
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public: bool SetFile(const std::string &_filename);
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/// \brief Get the audio filename that was set.
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/// \return The name of the set audio file.
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/// \sa AudioDecoder::SetFile
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public: std::string GetFile() const;
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/// \brief Decode the loaded audio file.
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/// \sa AudioDecoder::SetFile
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/// \param[out] _outBuffer Buffer that holds the decoded audio data.
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/// \param[out] _outBufferSize Size of the _outBuffer.
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/// \return True if decoding was succesful.
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public: bool Decode(uint8_t **_outBuffer, unsigned int *_outBufferSize);
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/// \brief Get the sample rate from the latest decoded file.
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/// \return Integer sample rate, such as 44100.
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public: int GetSampleRate();
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/// \brief Free audio object, close files, streams.
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private: void Cleanup();
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/// \brief libav Format I/O context.
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private: AVFormatContext *formatCtx;
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/// \brief libav main external API structure.
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private: AVCodecContext *codecCtx;
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/// \brief libavcodec audio codec.
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private: AVCodec *codec;
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/// \brief Index of the audio stream.
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private: int audioStream;
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/// \brief True when initialized. We just want to initialize once..
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private: static bool initialized;
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/// \brief Audio file to decode.
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private: std::string filename;
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};
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/// \}
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}
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}
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#endif
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