f0ab344a4e
This allows nodes downstream of the mixer to know the exact frame at which EOS is reached. More concepts have been introduced into PipelineStatus.h to make each condition in the pipeline clearer about its intent.
74 lines
2.2 KiB
C++
74 lines
2.2 KiB
C++
/*
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* Copyright (c) 2026-present, the Ladybird developers.
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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 <AK/Atomic.h>
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#include <AK/HashMap.h>
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#include <AK/NonnullRefPtr.h>
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#include <AK/RefPtr.h>
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#include <LibMedia/Audio/Forward.h>
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#include <LibMedia/Audio/SampleSpecification.h>
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#include <LibMedia/AudioBlock.h>
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#include <LibMedia/Export.h>
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#include <LibMedia/Forward.h>
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#include <LibMedia/PipelineStatus.h>
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#include <LibMedia/Processors/AudioProcessor.h>
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#include <LibMedia/Producers/AudioProducer.h>
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#include <LibSync/Mutex.h>
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namespace Media {
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class MEDIA_API AudioMixer final : public AudioProcessor {
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public:
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static ErrorOr<NonnullRefPtr<AudioMixer>> try_create();
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AudioMixer();
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virtual ~AudioMixer() override;
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virtual ErrorOr<void> connect_input(NonnullRefPtr<AudioProducer> const&) override;
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virtual void disconnect_input(NonnullRefPtr<AudioProducer> const&) override;
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virtual void seek(AK::Duration timestamp) override;
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virtual void set_playback_rate(float) override;
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virtual ErrorOr<void> set_output_sample_specification(Audio::SampleSpecification) override;
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Audio::SampleSpecification sample_specification() const;
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virtual void start() override;
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virtual PipelineStatus status() const override;
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virtual void pull(AudioBlock& into) override;
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virtual void set_wake_handler(PipelineWakeHandler) override;
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private:
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struct InputMixingData {
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AudioBlock current_block;
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i64 next_frame { 0 };
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PipelineStatus last_status { PipelineStatus::Pending };
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};
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PipelineStatus combined_input_status() const;
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void dispatch_wake();
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AK::Duration mix_head_timestamp() const;
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void disconnect_input_while_locked(NonnullRefPtr<AudioProducer> const&);
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mutable Sync::Mutex m_mutex;
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Audio::SampleSpecification m_sample_specification;
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mutable HashMap<NonnullRefPtr<AudioProducer>, InputMixingData> m_inputs;
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i64 m_next_frame_to_write { 0 };
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float m_playback_rate { 1.0f };
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bool m_started { false };
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bool m_moved_position_pending { false };
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PipelineWakeHandler m_wake_handler;
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mutable PipelineStatus m_status { PipelineStatus::Pending };
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mutable PipelineStatus m_last_returned_status { PipelineStatus::Pending };
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};
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}
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