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https://github.com/RGBCube/serenity
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426248098c
I had to solve a bunch of things simultaneously to make this work. Refactor AWavLoader to be a streaming loader rather than a one-shot one. The constructor parses the header, and if everything looks good, you can repeatedly ask the AWavLoader for sample buffers until it runs out. Also send a message from AudioServer when a buffer has finished playing. That allows us to implement a blocking variant of play(). Use all of this in aplay to play WAV files chunk-at-a-time. This is definitely not perfect and it's a little glitchy and skippy, but I think it's a step in the right direction.
31 lines
649 B
C++
31 lines
649 B
C++
#pragma once
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#include <AK/AKString.h>
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#include <AK/RefPtr.h>
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#include <AK/StringView.h>
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#include <LibCore/CFile.h>
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class ABuffer;
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namespace AK {
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class ByteBuffer;
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}
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// Parses a WAV file and produces an ABuffer instance from it
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class AWavLoader {
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public:
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explicit AWavLoader(const StringView& path);
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RefPtr<ABuffer> load_wav(const StringView& path);
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const char* error_string() { return m_error_string.characters(); }
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RefPtr<ABuffer> get_more_samples();
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private:
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bool parse_header();
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CFile m_file;
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String m_error_string;
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u32 m_sample_rate { 0 };
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u16 m_num_channels { 0 };
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u16 m_bits_per_sample { 0 };
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};
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