2ba4d878e5
This was created with the unfinished resampling PR in mind. As the resampling is now on the audio thread, we don't need to care about this here any more.
137 lines
3.7 KiB
C++
137 lines
3.7 KiB
C++
// Copyright 2018 yuzu Emulator Project
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// Licensed under GPLv2 or any later version
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// Refer to the license.txt file included.
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#include <algorithm>
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#include <cmath>
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#include "audio_core/sink.h"
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#include "audio_core/sink_details.h"
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#include "audio_core/sink_stream.h"
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#include "audio_core/stream.h"
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#include "common/assert.h"
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#include "common/logging/log.h"
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#include "core/core_timing.h"
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#include "core/core_timing_util.h"
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#include "core/settings.h"
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namespace AudioCore {
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constexpr std::size_t MaxAudioBufferCount{32};
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u32 Stream::GetNumChannels() const {
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switch (format) {
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case Format::Mono16:
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return 1;
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case Format::Stereo16:
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return 2;
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case Format::Multi51Channel16:
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return 6;
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}
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LOG_CRITICAL(Audio, "Unimplemented format={}", static_cast<u32>(format));
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UNREACHABLE();
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return {};
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}
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Stream::Stream(u32 sample_rate, Format format, ReleaseCallback&& release_callback,
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SinkStream& sink_stream, std::string&& name_)
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: sample_rate{sample_rate}, format{format}, release_callback{std::move(release_callback)},
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sink_stream{sink_stream}, name{std::move(name_)} {
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release_event = CoreTiming::RegisterEvent(
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name, [this](u64 userdata, int cycles_late) { ReleaseActiveBuffer(); });
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}
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void Stream::Play() {
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state = State::Playing;
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PlayNextBuffer();
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}
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void Stream::Stop() {
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state = State::Stopped;
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ASSERT_MSG(false, "Unimplemented");
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}
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Stream::State Stream::GetState() const {
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return state;
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}
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s64 Stream::GetBufferReleaseCycles(const Buffer& buffer) const {
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const std::size_t num_samples{buffer.GetSamples().size() / GetNumChannels()};
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return CoreTiming::usToCycles((static_cast<u64>(num_samples) * 1000000) / sample_rate);
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}
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static void VolumeAdjustSamples(std::vector<s16>& samples) {
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const float volume{std::clamp(Settings::values.volume, 0.0f, 1.0f)};
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if (volume == 1.0f) {
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return;
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}
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// Implementation of a volume slider with a dynamic range of 60 dB
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const float volume_scale_factor{std::exp(6.90775f * volume) * 0.001f};
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for (auto& sample : samples) {
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sample = static_cast<s16>(sample * volume_scale_factor);
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}
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}
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void Stream::PlayNextBuffer() {
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if (!IsPlaying()) {
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// Ensure we are in playing state before playing the next buffer
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sink_stream.Flush();
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return;
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}
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if (active_buffer) {
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// Do not queue a new buffer if we are already playing a buffer
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return;
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}
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if (queued_buffers.empty()) {
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// No queued buffers - we are effectively paused
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sink_stream.Flush();
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return;
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}
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active_buffer = queued_buffers.front();
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queued_buffers.pop();
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VolumeAdjustSamples(active_buffer->Samples());
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sink_stream.EnqueueSamples(GetNumChannels(), active_buffer->GetSamples());
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CoreTiming::ScheduleEventThreadsafe(GetBufferReleaseCycles(*active_buffer), release_event, {});
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}
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void Stream::ReleaseActiveBuffer() {
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ASSERT(active_buffer);
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released_buffers.push(std::move(active_buffer));
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release_callback();
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PlayNextBuffer();
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}
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bool Stream::QueueBuffer(BufferPtr&& buffer) {
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if (queued_buffers.size() < MaxAudioBufferCount) {
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queued_buffers.push(std::move(buffer));
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PlayNextBuffer();
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return true;
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}
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return false;
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}
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bool Stream::ContainsBuffer(Buffer::Tag tag) const {
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ASSERT_MSG(false, "Unimplemented");
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return {};
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}
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std::vector<Buffer::Tag> Stream::GetTagsAndReleaseBuffers(std::size_t max_count) {
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std::vector<Buffer::Tag> tags;
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for (std::size_t count = 0; count < max_count && !released_buffers.empty(); ++count) {
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tags.push_back(released_buffers.front()->GetTag());
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released_buffers.pop();
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}
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return tags;
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}
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} // namespace AudioCore
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