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https://github.com/LadybirdBrowser/ladybird.git
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This loader supports whatever format libavformat and libavcodec can handle. Currently only seekable streams are supported, and we still have some limitations as to the number of channels and sample format. Plays all non-streaming audio files at: https://tools.woolyss.com/html5-audio-video-tester/
68 lines
1.9 KiB
C++
68 lines
1.9 KiB
C++
/*
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* Copyright (c) 2024, Jelle Raaijmakers <jelle@ladybird.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include "Loader.h"
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#include <AK/Error.h>
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#include <AK/NonnullOwnPtr.h>
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extern "C" {
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#include <libavcodec/avcodec.h>
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#include <libavformat/avformat.h>
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#include <libavutil/samplefmt.h>
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}
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namespace Audio {
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class FFmpegIOContext {
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public:
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explicit FFmpegIOContext(AVIOContext*);
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~FFmpegIOContext();
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static ErrorOr<NonnullOwnPtr<FFmpegIOContext>, LoaderError> create(AK::SeekableStream& stream);
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AVIOContext* avio_context() const { return m_avio_context; }
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private:
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AVIOContext* m_avio_context { nullptr };
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};
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class FFmpegLoaderPlugin : public LoaderPlugin {
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public:
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explicit FFmpegLoaderPlugin(NonnullOwnPtr<SeekableStream>, NonnullOwnPtr<FFmpegIOContext>);
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virtual ~FFmpegLoaderPlugin();
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static bool sniff(SeekableStream& stream);
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static ErrorOr<NonnullOwnPtr<LoaderPlugin>, LoaderError> create(NonnullOwnPtr<SeekableStream>);
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virtual ErrorOr<Vector<FixedArray<Sample>>, LoaderError> load_chunks(size_t samples_to_read_from_input) override;
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virtual MaybeLoaderError reset() override;
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virtual MaybeLoaderError seek(int sample_index) override;
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virtual int loaded_samples() override { return m_loaded_samples; }
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virtual int total_samples() override { return m_total_samples; }
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virtual u32 sample_rate() override;
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virtual u16 num_channels() override;
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virtual PcmSampleFormat pcm_format() override;
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virtual ByteString format_name() override;
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private:
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MaybeLoaderError initialize();
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double time_base() const;
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AVStream* m_audio_stream;
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AVCodecContext* m_codec_context { nullptr };
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AVFormatContext* m_format_context { nullptr };
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AVFrame* m_frame { nullptr };
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NonnullOwnPtr<FFmpegIOContext> m_io_context;
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int m_loaded_samples { 0 };
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AVPacket* m_packet { nullptr };
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int m_total_samples { 0 };
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};
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}
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