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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>
59 lines
1.4 KiB
C++
59 lines
1.4 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 "minimp3/minimp3.h"
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#include <cstring>
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#include "Decoder.hpp"
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extern "C"
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{
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#include "xing_header.h"
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};
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namespace audio
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{
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class decoderMP3 : public Decoder
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{
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public:
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decoderMP3(const char *fileName);
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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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void fetchTagsSpecific() override;
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bool find_first_valid_frame();
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uint32_t get_frames_count();
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const uint32_t DECODER_BUFFER_SIZE = 1024 * 24;
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std::unique_ptr<mp3dec_t> mp3d;
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std::unique_ptr<uint8_t[]> decoderBuffer = nullptr;
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uint32_t decoderBufferIdx = 0;
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std::unique_ptr<uint16_t[]> pcmsamplesbuffer = nullptr;
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uint32_t pcmsamplesbuffer_idx = 0;
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const size_t pcmsamplesbuffer_size = (8192 + MINIMP3_MAX_SAMPLES_PER_FRAME) * sizeof(int16_t);
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uint32_t samplesPerFrame = 0;
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// Variables below are used during decoding procedure
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uint32_t firstValidFrameByteSize = 0;
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uint32_t firstValidFrameFileOffset = 0;
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bool lastRefill = false;
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bool decoderNotFirstRun = false;
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uint32_t bytesAvailable = 0;
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};
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} // namespace audio
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