1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
|
// Copyright 2018 yuzu Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include <algorithm>
#include <cmath>
#include "audio_core/sink.h"
#include "audio_core/sink_details.h"
#include "audio_core/sink_stream.h"
#include "audio_core/stream.h"
#include "common/assert.h"
#include "common/logging/log.h"
#include "core/core_timing.h"
#include "core/core_timing_util.h"
#include "core/settings.h"
namespace AudioCore {
constexpr std::size_t MaxAudioBufferCount{32};
u32 Stream::GetNumChannels() const {
switch (format) {
case Format::Mono16:
return 1;
case Format::Stereo16:
return 2;
case Format::Multi51Channel16:
return 6;
}
UNIMPLEMENTED_MSG("Unimplemented format={}", static_cast<u32>(format));
return {};
}
Stream::Stream(Core::Timing::CoreTiming& core_timing, u32 sample_rate, Format format,
ReleaseCallback&& release_callback, SinkStream& sink_stream, std::string&& name_)
: sample_rate{sample_rate}, format{format}, release_callback{std::move(release_callback)},
sink_stream{sink_stream}, core_timing{core_timing}, name{std::move(name_)} {
release_event = Core::Timing::CreateEvent(
name, [this](u64, std::chrono::nanoseconds ns_late) { ReleaseActiveBuffer(ns_late); });
}
void Stream::Play() {
state = State::Playing;
PlayNextBuffer();
}
void Stream::Stop() {
state = State::Stopped;
UNIMPLEMENTED();
}
void Stream::SetVolume(float volume) {
game_volume = volume;
}
Stream::State Stream::GetState() const {
return state;
}
std::chrono::nanoseconds Stream::GetBufferReleaseNS(const Buffer& buffer) const {
const std::size_t num_samples{buffer.GetSamples().size() / GetNumChannels()};
return std::chrono::nanoseconds((static_cast<u64>(num_samples) * 1000000000ULL) / sample_rate);
}
static void VolumeAdjustSamples(std::vector<s16>& samples, float game_volume) {
const float volume{std::clamp(Settings::Volume() - (1.0f - game_volume), 0.0f, 1.0f)};
if (volume == 1.0f) {
return;
}
// Implementation of a volume slider with a dynamic range of 60 dB
const float volume_scale_factor = volume == 0 ? 0 : std::exp(6.90775f * volume) * 0.001f;
for (auto& sample : samples) {
sample = static_cast<s16>(sample * volume_scale_factor);
}
}
void Stream::PlayNextBuffer(std::chrono::nanoseconds ns_late) {
if (!IsPlaying()) {
// Ensure we are in playing state before playing the next buffer
sink_stream.Flush();
return;
}
if (active_buffer) {
// Do not queue a new buffer if we are already playing a buffer
return;
}
if (queued_buffers.empty()) {
// No queued buffers - we are effectively paused
sink_stream.Flush();
return;
}
active_buffer = queued_buffers.front();
queued_buffers.pop();
VolumeAdjustSamples(active_buffer->GetSamples(), game_volume);
sink_stream.EnqueueSamples(GetNumChannels(), active_buffer->GetSamples());
const auto time_stretch_delta = Settings::values.enable_audio_stretching.GetValue()
? std::chrono::nanoseconds::zero()
: ns_late;
const auto future_time = GetBufferReleaseNS(*active_buffer) - time_stretch_delta;
core_timing.ScheduleEvent(future_time, release_event, {});
}
void Stream::ReleaseActiveBuffer(std::chrono::nanoseconds ns_late) {
ASSERT(active_buffer);
released_buffers.push(std::move(active_buffer));
release_callback();
PlayNextBuffer(ns_late);
}
bool Stream::QueueBuffer(BufferPtr&& buffer) {
if (queued_buffers.size() < MaxAudioBufferCount) {
queued_buffers.push(std::move(buffer));
PlayNextBuffer();
return true;
}
return false;
}
bool Stream::ContainsBuffer(Buffer::Tag tag) const {
UNIMPLEMENTED();
return {};
}
std::vector<Buffer::Tag> Stream::GetTagsAndReleaseBuffers(std::size_t max_count) {
std::vector<Buffer::Tag> tags;
for (std::size_t count = 0; count < max_count && !released_buffers.empty(); ++count) {
tags.push_back(released_buffers.front()->GetTag());
released_buffers.pop();
}
return tags;
}
} // namespace AudioCore
|
