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36b0228de2
* Fix of the issue that seeking in large MP3 file would cause OOM error when creating MP3 indexes. This caused OS crash when looping large MP3 file in Relaxation. * Minor cleanups.
49 lines
1.8 KiB
C++
49 lines
1.8 KiB
C++
// Copyright (c) 2017-2025, Mudita Sp. z.o.o. All rights reserved.
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// For licensing, see https://github.com/mudita/MuditaOS/blob/master/LICENSE.md
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#pragma once
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#include "Decoder.hpp"
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#include <minimp3_ex.h>
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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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explicit DecoderMP3(const std::string &filePath);
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~DecoderMP3() override;
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auto decode(std::uint32_t samplesToRead, std::int16_t *pcmData) -> std::int32_t override;
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auto setPosition(float pos) -> void override;
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auto rewind() -> void override;
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private:
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std::unique_ptr<mp3dec_ex_t> dec;
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std::unique_ptr<mp3dec_io_t> io;
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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 assigned to mp3dec_io_t 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 auto mp3Read(void *pBufferOut, std::size_t bytesToRead, void *pUserData) -> std::size_t;
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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 assigned to mp3dec_io_t 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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//
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// Returns whether the seek was successful.
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//
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// The offset will never be negative. It relates to the beginning position.
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static auto mp3Seek(std::uint64_t offset, void *pUserData) -> int;
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};
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} // namespace audio
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