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https://github.com/LadybirdBrowser/ladybird
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19ccec2c10
Audio blocks now contain a sample specification with the sample rate and channel map for the audio data they contain. This will facilitate conversion from one sample specification to another in order to allow playback on devices with more or less speakers than the audio data contains.
78 lines
2.3 KiB
C++
78 lines
2.3 KiB
C++
/*
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* Copyright (c) 2025, Gregory Bertilson <gregory@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 <AK/FixedArray.h>
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#include <AK/Math.h>
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#include <AK/Time.h>
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#include <LibMedia/Audio/SampleSpecification.h>
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namespace Media {
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class AudioBlock {
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public:
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using Data = FixedArray<float>;
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Audio::SampleSpecification const& sample_specification() const { return m_sample_specification; }
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AK::Duration timestamp() const { return m_timestamp; }
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i64 timestamp_in_samples() const { return m_timestamp_in_samples; }
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i64 end_timestamp_in_samples() const { return Checked<i64>::saturating_add(m_timestamp_in_samples, AK::clamp_to<i64>(sample_count())); }
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AK::Duration end_timestamp() const { return AK::Duration::from_time_units(end_timestamp_in_samples(), 1, sample_rate()); }
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Data& data() { return m_data; }
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Data const& data() const { return m_data; }
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void clear()
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{
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m_sample_specification = {};
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m_timestamp_in_samples = 0;
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m_data = Data();
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}
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template<typename Callback>
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void emplace(Audio::SampleSpecification sample_specification, AK::Duration timestamp, Callback data_callback)
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{
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VERIFY(sample_specification.is_valid());
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m_sample_specification = sample_specification;
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m_timestamp = timestamp;
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m_timestamp_in_samples = timestamp.to_time_units(1, sample_rate());
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data_callback(m_data);
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}
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u32 sample_rate() const
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{
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return sample_specification().sample_rate();
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}
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void set_timestamp_in_samples(i64 timestamp_in_samples)
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{
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VERIFY(!is_empty());
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m_timestamp_in_samples = timestamp_in_samples;
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m_timestamp = AK::Duration::from_time_units(timestamp_in_samples, 1, sample_rate());
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}
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bool is_empty() const
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{
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return !sample_specification().is_valid();
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}
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size_t data_count() const
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{
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return data().size();
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}
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u8 channel_count() const
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{
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return sample_specification().channel_map().channel_count();
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}
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size_t sample_count() const
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{
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return data_count() / channel_count();
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}
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private:
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Audio::SampleSpecification m_sample_specification;
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AK::Duration m_timestamp;
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i64 m_timestamp_in_samples { 0 };
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Data m_data;
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};
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}
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