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871b250d86
Refactor audio data path to fix several synchronization issues and excessive copy operations on large memory blocks. Introduce audio::Stream data structure to allow connecting audio source and sink with a zero-copy capability. Introduce system mechanisms: - critical section guard lock needed for stream synchronization - non-cacheable memory allocator to allocate memory for DMA safe buffers Update the Googletest CMake template to match the capabilities of the Catch2 template. Signed-off-by: Marcin Smoczyński <smoczynski.marcin@gmail.com> Signed-off-by: Hubert Chrzaniuk <hubert.chrzaniuk@mudita.com>
62 lines
2.3 KiB
C++
62 lines
2.3 KiB
C++
// Copyright (c) 2017-2020, Mudita Sp. z.o.o. All rights reserved.
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// For licensing, see https://github.com/mudita/MuditaOS/LICENSE.md
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#pragma once
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#include "Decoder.hpp"
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#include "dr_flac.h"
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namespace audio
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{
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class decoderFLAC : public Decoder
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{
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public:
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decoderFLAC(const char *fileName);
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~decoderFLAC();
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uint32_t decode(uint32_t samplesToRead, int16_t *pcmData) override;
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void setPosition(float pos) override;
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private:
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drflac *flac = nullptr;
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uint32_t totalSamplesCount = 0;
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/* Data encoded in UTF-8 */
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void flac_parse_text(uint8_t *in, uint32_t taglen, uint32_t datalen, uint8_t *out, uint32_t outlen);
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// Callback for when data needs to be read from the client.
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//
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// pUserData [in] The user data that was passed to drflac_open() and family.
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// pBufferOut [out] The output buffer.
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// bytesToRead [in] The number of bytes to read.
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//
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// Returns the number of bytes actually read.
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//
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// A return value of less than bytesToRead indicates the end of the stream. Do _not_ return from this callback
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// until either the entire bytesToRead is filled or you have reached the end of the stream.
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static size_t drflac_read(void *pUserData, void *pBufferOut, size_t bytesToRead);
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// Callback for when data needs to be seeked.
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//
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// pUserData [in] The user data that was passed to drflac_open() and family.
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// offset [in] The number of bytes to move, relative to the origin. Will never be negative.
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// origin [in] The origin of the seek - the current position or the start of the stream.
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//
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// Returns whether or not the seek was successful.
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//
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// The offset will never be negative. Whether or not it is relative to the beginning or current position is
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// determined by the "origin" parameter which will be either drflac_seek_origin_start or
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// drflac_seek_origin_current.
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static drflac_bool32 drflac_seek(void *pUserData, int offset, drflac_seek_origin origin);
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// Use pMetadata->type to determine which metadata block is being handled and how to read the data.
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static void drflac_meta(void *pUserData, drflac_metadata *pMetadata);
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};
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} // namespace audio
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