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Diffstat (limited to 'extern/audaspace/plugins/ffmpeg/FFMPEGReader.h')
-rw-r--r-- | extern/audaspace/plugins/ffmpeg/FFMPEGReader.h | 184 |
1 files changed, 184 insertions, 0 deletions
diff --git a/extern/audaspace/plugins/ffmpeg/FFMPEGReader.h b/extern/audaspace/plugins/ffmpeg/FFMPEGReader.h new file mode 100644 index 00000000000..e2ae959912d --- /dev/null +++ b/extern/audaspace/plugins/ffmpeg/FFMPEGReader.h @@ -0,0 +1,184 @@ +/******************************************************************************* + * Copyright 2009-2016 Jörg Müller + * + * 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. + ******************************************************************************/ + +#pragma once + +#ifdef FFMPEG_PLUGIN +#define AUD_BUILD_PLUGIN +#endif + +/** + * @file FFMPEGReader.h + * @ingroup plugin + * The FFMPEGReader class. + */ + +#include "respec/ConverterFunctions.h" +#include "IReader.h" +#include "util/Buffer.h" + +#include <string> +#include <memory> + +struct AVCodecContext; +extern "C" { +#include <libavformat/avformat.h> +} + +AUD_NAMESPACE_BEGIN + +/** + * This class reads a sound file via ffmpeg. + * \warning Seeking may not be accurate! Moreover the position is updated after + * a buffer reading call. So calling getPosition right after seek + * normally results in a wrong value. + */ +class AUD_PLUGIN_API FFMPEGReader : public IReader +{ +private: + /** + * The current position in samples. + */ + int m_position; + + /** + * The specification of the audio data. + */ + DeviceSpecs m_specs; + + /** + * The buffer for package reading. + */ + Buffer m_pkgbuf; + + /** + * The count of samples still available from the last read package. + */ + int m_pkgbuf_left; + + /** + * The AVFormatContext structure for using ffmpeg. + */ + AVFormatContext* m_formatCtx; + + /** + * The AVCodecContext structure for using ffmpeg. + */ + AVCodecContext* m_codecCtx; + + /** + * The AVIOContext to read the data from. + */ + AVIOContext* m_aviocontext; + + /** + * The stream ID in the file. + */ + int m_stream; + + /** + * Converter function. + */ + convert_f m_convert; + + /** + * The memory file to read from. + */ + std::shared_ptr<Buffer> m_membuffer; + + /** + * The buffer to read with. + */ + data_t* m_membuf; + + /** + * Reading position of the buffer. + */ + int64_t m_membufferpos; + + /** + * Whether the audio data has to be interleaved after reading. + */ + bool m_tointerleave; + + /** + * Decodes a packet into the given buffer. + * \param packet The AVPacket to decode. + * \param buffer The target buffer. + * \return The count of read bytes. + */ + AUD_LOCAL int decode(AVPacket& packet, Buffer& buffer); + + /** + * Initializes the object. + */ + AUD_LOCAL void init(); + + // delete copy constructor and operator= + FFMPEGReader(const FFMPEGReader&) = delete; + FFMPEGReader& operator=(const FFMPEGReader&) = delete; + +public: + /** + * Creates a new reader. + * \param filename The path to the file to be read. + * \exception Exception Thrown if the file specified does not exist or + * cannot be read with ffmpeg. + */ + FFMPEGReader(std::string filename); + + /** + * Creates a new reader. + * \param buffer The buffer to read from. + * \exception Exception Thrown if the buffer specified cannot be read + * with ffmpeg. + */ + FFMPEGReader(std::shared_ptr<Buffer> buffer); + + /** + * Destroys the reader and closes the file. + */ + virtual ~FFMPEGReader(); + + /** + * Reads data to a memory buffer. + * This function is used for avio only. + * @param opaque The FFMPEGReader. + * @param buf The buffer to read to. + * @param buf_size The size of the buffer. + * @return How many bytes have been read. + */ + static int read_packet(void* opaque, uint8_t* buf, int buf_size); + + /** + * Seeks within data. + * This function is used for avio only. + * @param opaque The FFMPEGReader. + * @param offset The byte offset to seek to. + * @param whence The seeking action. + * @return The current position or the size of the data if requested. + */ + static int64_t seek_packet(void* opaque, int64_t offset, int whence); + + virtual bool isSeekable() const; + virtual void seek(int position); + virtual int getLength() const; + virtual int getPosition() const; + virtual Specs getSpecs() const; + virtual void read(int& length, bool& eos, sample_t* buffer); +}; + +AUD_NAMESPACE_END |