You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
89 lines
2.0 KiB
89 lines
2.0 KiB
2 years ago
|
/*
|
||
|
|
* Copyright 2023 jacqueline <me@jacqueline.id.au>
|
||
|
|
*
|
||
|
|
* SPDX-License-Identifier: GPL-3.0-only
|
||
|
|
*/
|
||
|
|
|
||
|
|
#pragma once
|
||
|
|
|
||
|
|
#include <sys/_stdint.h>
|
||
|
|
#include <cstdint>
|
||
|
|
#include <memory>
|
||
|
|
|
||
|
|
#include "samplerate.h"
|
||
|
|
|
||
|
|
#include "audio_decoder.hpp"
|
||
|
|
#include "audio_sink.hpp"
|
||
|
|
#include "audio_source.hpp"
|
||
|
|
#include "codec.hpp"
|
||
|
|
#include "pipeline.hpp"
|
||
|
|
#include "stream_info.hpp"
|
||
|
|
|
||
|
|
namespace audio {
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Handles the final downmix + resample + quantisation stage of audio,
|
||
|
|
* generation sending the result directly to an IAudioSink.
|
||
|
|
*/
|
||
|
|
class SinkMixer {
|
||
|
|
public:
|
||
|
|
SinkMixer(StreamBufferHandle_t dest);
|
||
|
|
~SinkMixer();
|
||
|
|
|
||
|
|
auto MixAndSend(InputStream&, const StreamInfo::Pcm&) -> std::size_t;
|
||
|
|
|
||
|
|
private:
|
||
|
|
auto Main() -> void;
|
||
|
|
|
||
|
|
auto SetTargetFormat(const StreamInfo::Pcm& format) -> void;
|
||
|
|
auto HandleBytes() -> void;
|
||
|
|
|
||
|
|
template <typename T>
|
||
|
|
auto ConvertFixedToFloating(InputStream&, OutputStream&) -> void;
|
||
|
|
auto Resample(float, int, InputStream&, OutputStream&) -> void;
|
||
|
|
template <typename T>
|
||
|
|
auto Quantise(InputStream&) -> std::size_t;
|
||
|
|
|
||
|
|
enum class Command {
|
||
|
|
kReadBytes,
|
||
|
|
kSetSourceFormat,
|
||
|
|
kSetTargetFormat,
|
||
|
|
};
|
||
|
|
|
||
|
|
struct Args {
|
||
|
|
Command cmd;
|
||
|
|
StreamInfo::Pcm format;
|
||
|
|
};
|
||
|
|
|
||
|
|
QueueHandle_t commands_;
|
||
|
|
SemaphoreHandle_t is_idle_;
|
||
|
|
|
||
|
|
SRC_STATE* resampler_;
|
||
|
|
|
||
|
|
std::unique_ptr<RawStream> input_stream_;
|
||
|
|
std::unique_ptr<RawStream> floating_point_stream_;
|
||
|
|
std::unique_ptr<RawStream> resampled_stream_;
|
||
|
|
|
||
|
|
cpp::span<std::byte> quantisation_buffer_;
|
||
|
|
cpp::span<short> quantisation_buffer_as_shorts_;
|
||
|
|
cpp::span<int> quantisation_buffer_as_ints_;
|
||
|
|
|
||
|
|
StreamInfo::Pcm target_format_;
|
||
|
|
StreamBufferHandle_t source_;
|
||
|
|
StreamBufferHandle_t sink_;
|
||
|
|
};
|
||
|
|
|
||
|
|
template <>
|
||
|
|
auto SinkMixer::ConvertFixedToFloating<short>(InputStream&, OutputStream&)
|
||
|
|
-> void;
|
||
|
|
template <>
|
||
|
|
auto SinkMixer::ConvertFixedToFloating<int>(InputStream&, OutputStream&)
|
||
|
|
-> void;
|
||
|
|
|
||
|
|
template <>
|
||
|
|
auto SinkMixer::Quantise<short>(InputStream&) -> std::size_t;
|
||
|
|
template <>
|
||
|
|
auto SinkMixer::Quantise<int>(InputStream&) -> std::size_t;
|
||
|
|
|
||
|
|
} // namespace audio
|