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
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
|
// Copyright 2018 yuzu emulator team
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include <vector>
#include "common/logging/log.h"
#include "core/core_timing.h"
#include "core/hle/ipc_helpers.h"
#include "core/hle/kernel/event.h"
#include "core/hle/kernel/hle_ipc.h"
#include "core/hle/service/audio/audout_u.h"
namespace Service::Audio {
/// Switch sample rate frequency
constexpr u32 sample_rate{48000};
/// TODO(st4rk): dynamic number of channels, as I think Switch has support
/// to more audio channels (probably when Docked I guess)
constexpr u32 audio_channels{2};
/// TODO(st4rk): find a proper value for the audio_ticks
constexpr u64 audio_ticks{static_cast<u64>(CoreTiming::BASE_CLOCK_RATE / 500)};
class IAudioOut final : public ServiceFramework<IAudioOut> {
public:
IAudioOut() : ServiceFramework("IAudioOut"), audio_out_state(AudioState::Stopped) {
static const FunctionInfo functions[] = {
{0, &IAudioOut::GetAudioOutState, "GetAudioOutState"},
{1, &IAudioOut::StartAudioOut, "StartAudioOut"},
{2, &IAudioOut::StopAudioOut, "StopAudioOut"},
{3, &IAudioOut::AppendAudioOutBuffer, "AppendAudioOutBuffer"},
{4, &IAudioOut::RegisterBufferEvent, "RegisterBufferEvent"},
{5, &IAudioOut::GetReleasedAudioOutBuffer, "GetReleasedAudioOutBuffer"},
{6, nullptr, "ContainsAudioOutBuffer"},
{7, nullptr, "AppendAudioOutBufferAuto"},
{8, nullptr, "GetReleasedAudioOutBufferAuto"},
{9, nullptr, "GetAudioOutBufferCount"},
{10, nullptr, "GetAudioOutPlayedSampleCount"},
{11, nullptr, "FlushAudioOutBuffers"},
};
RegisterHandlers(functions);
// This is the event handle used to check if the audio buffer was released
buffer_event =
Kernel::Event::Create(Kernel::ResetType::OneShot, "IAudioOutBufferReleasedEvent");
// Register event callback to update the Audio Buffer
audio_event = CoreTiming::RegisterEvent(
"IAudioOut::UpdateAudioBuffersCallback", [this](u64 userdata, int cycles_late) {
UpdateAudioBuffersCallback();
CoreTiming::ScheduleEvent(audio_ticks - cycles_late, audio_event);
});
// Start the audio event
CoreTiming::ScheduleEvent(audio_ticks, audio_event);
}
~IAudioOut() {
CoreTiming::UnscheduleEvent(audio_event, 0);
}
private:
void GetAudioOutState(Kernel::HLERequestContext& ctx) {
NGLOG_DEBUG(Service_Audio, "called");
IPC::ResponseBuilder rb{ctx, 3};
rb.Push(RESULT_SUCCESS);
rb.Push(static_cast<u32>(audio_out_state));
}
void StartAudioOut(Kernel::HLERequestContext& ctx) {
NGLOG_WARNING(Service_Audio, "(STUBBED) called");
// Start audio
audio_out_state = AudioState::Started;
IPC::ResponseBuilder rb{ctx, 2};
rb.Push(RESULT_SUCCESS);
}
void StopAudioOut(Kernel::HLERequestContext& ctx) {
NGLOG_WARNING(Service_Audio, "(STUBBED) called");
// Stop audio
audio_out_state = AudioState::Stopped;
queue_keys.clear();
IPC::ResponseBuilder rb{ctx, 2};
rb.Push(RESULT_SUCCESS);
}
void RegisterBufferEvent(Kernel::HLERequestContext& ctx) {
NGLOG_WARNING(Service_Audio, "(STUBBED) called");
IPC::ResponseBuilder rb{ctx, 2, 1};
rb.Push(RESULT_SUCCESS);
rb.PushCopyObjects(buffer_event);
}
void AppendAudioOutBuffer(Kernel::HLERequestContext& ctx) {
NGLOG_WARNING(Service_Audio, "(STUBBED) called");
IPC::RequestParser rp{ctx};
const u64 key{rp.Pop<u64>()};
queue_keys.insert(queue_keys.begin(), key);
IPC::ResponseBuilder rb{ctx, 2};
rb.Push(RESULT_SUCCESS);
}
void GetReleasedAudioOutBuffer(Kernel::HLERequestContext& ctx) {
NGLOG_WARNING(Service_Audio, "(STUBBED) called");
// TODO(st4rk): This is how libtransistor currently implements the
// GetReleasedAudioOutBuffer, it should return the key (a VAddr) to the app and this address
// is used to know which buffer should be filled with data and send again to the service
// through AppendAudioOutBuffer. Check if this is the proper way to do it.
u64 key{0};
if (queue_keys.size()) {
key = queue_keys.back();
queue_keys.pop_back();
}
ctx.WriteBuffer(&key, sizeof(u64));
IPC::ResponseBuilder rb{ctx, 3};
rb.Push(RESULT_SUCCESS);
// TODO(st4rk): This might be the total of released buffers, needs to be verified on
// hardware
rb.Push<u32>(static_cast<u32>(queue_keys.size()));
}
void UpdateAudioBuffersCallback() {
if (audio_out_state != AudioState::Started) {
return;
}
if (queue_keys.empty()) {
return;
}
buffer_event->Signal();
}
enum class AudioState : u32 {
Started,
Stopped,
};
/// This is used to trigger the audio event callback that is going to read the samples from the
/// audio_buffer list and enqueue the samples using the sink (audio_core).
CoreTiming::EventType* audio_event;
/// This is the evend handle used to check if the audio buffer was released
Kernel::SharedPtr<Kernel::Event> buffer_event;
/// (st4rk): This is just a temporary workaround for the future implementation. Libtransistor
/// uses the key as an address in the App, so we need to return when the
/// GetReleasedAudioOutBuffer_1 is called, otherwise we'll run in problems, because
/// libtransistor uses the key returned as an pointer.
std::vector<u64> queue_keys;
AudioState audio_out_state;
};
void AudOutU::ListAudioOuts(Kernel::HLERequestContext& ctx) {
NGLOG_WARNING(Service_Audio, "(STUBBED) called");
IPC::RequestParser rp{ctx};
const std::string audio_interface = "AudioInterface";
ctx.WriteBuffer(audio_interface.c_str(), audio_interface.size());
IPC::ResponseBuilder rb = rp.MakeBuilder(3, 0, 0);
rb.Push(RESULT_SUCCESS);
// TODO(st4rk): We're currently returning only one audio interface (stringlist size). However,
// it's highly possible to have more than one interface (despite that libtransistor requires
// only one).
rb.Push<u32>(1);
}
void AudOutU::OpenAudioOut(Kernel::HLERequestContext& ctx) {
NGLOG_WARNING(Service_Audio, "(STUBBED) called");
if (!audio_out_interface) {
audio_out_interface = std::make_shared<IAudioOut>();
}
IPC::ResponseBuilder rb{ctx, 6, 0, 1};
rb.Push(RESULT_SUCCESS);
rb.Push<u32>(sample_rate);
rb.Push<u32>(audio_channels);
rb.Push<u32>(static_cast<u32>(PcmFormat::Int16));
rb.Push<u32>(0); // This field is unknown
rb.PushIpcInterface<Audio::IAudioOut>(audio_out_interface);
}
AudOutU::AudOutU() : ServiceFramework("audout:u") {
static const FunctionInfo functions[] = {{0, &AudOutU::ListAudioOuts, "ListAudioOuts"},
{1, &AudOutU::OpenAudioOut, "OpenAudioOut"},
{2, nullptr, "ListAudioOutsAuto"},
{3, nullptr, "OpenAudioOutAuto"}};
RegisterHandlers(functions);
}
} // namespace Service::Audio
|
