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AudioServer: Expose the ability to get and set the sample rate

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Two new IPC calls allow audio clients to get and set the sample rate.
The AudioServer calls into the new ioctl of the sound card.
This commit is contained in:
kleines Filmröllchen 2021-08-19 00:07:29 +02:00 committed by Ali Mohammad Pur
parent d0ceaa24a6
commit 9880a5c481
Notes: sideshowbarker 2024-07-18 05:12:49 +09:00 
Author: https://github.com/kleinesfilmroellchen
Commit: https://github.com/SerenityOS/serenity/commit/9880a5c4815
Pull-request: https://github.com/SerenityOS/serenity/pull/9471
Reviewed-by: https://github.com/alimpfard
Reviewed-by: https://github.com/awesomekling
5 changed files with 38 additions and 0 deletions
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4
Userland/Services/AudioServer/AudioServer.ipc
View file

@ -8,6 +8,10 @@ endpoint AudioServer
get_main_mix_volume() => (i32 volume)
set_main_mix_volume(i32 volume) => ()
// Audio device
set_sample_rate(u16 sample_rate) => ()
get_sample_rate() => (u16 sample_rate)
// Buffer playback
enqueue_buffer(Core::AnonymousBuffer buffer, i32 buffer_id, int sample_count) => (bool success)
set_paused(bool paused) => ()

10
Userland/Services/AudioServer/ClientConnection.cpp
View file

@ -63,6 +63,16 @@ void ClientConnection::set_main_mix_volume(i32 volume)
m_mixer.set_main_volume(volume);
}
Messages::AudioServer::GetSampleRateResponse ClientConnection::get_sample_rate()
{
return { m_mixer.audiodevice_get_sample_rate() };
}
void ClientConnection::set_sample_rate(u16 sample_rate)
{
m_mixer.audiodevice_set_sample_rate(sample_rate);
}
Messages::AudioServer::EnqueueBufferResponse ClientConnection::enqueue_buffer(Core::AnonymousBuffer const& buffer, i32 buffer_id, int sample_count)
{
if (!m_queue)

2
Userland/Services/AudioServer/ClientConnection.h
View file

@ -45,6 +45,8 @@ private:
virtual Messages::AudioServer::GetPlayingBufferResponse get_playing_buffer() override;
virtual Messages::AudioServer::GetMutedResponse get_muted() override;
virtual void set_muted(bool) override;
virtual void set_sample_rate(u16 sample_rate) override;
virtual Messages::AudioServer::GetSampleRateResponse get_sample_rate() override;
Mixer& m_mixer;
RefPtr<BufferQueue> m_queue;

19
Userland/Services/AudioServer/Mixer.cpp
View file

@ -14,6 +14,8 @@
#include <LibCore/ConfigFile.h>
#include <LibCore/Timer.h>
#include <pthread.h>
#include <stdlib.h>
#include <sys/ioctl.h>
namespace AudioServer {
@ -150,6 +152,23 @@ void Mixer::set_muted(bool muted)
});
}
int Mixer::audiodevice_set_sample_rate(u16 sample_rate)
{
int code = ioctl(m_device->fd(), SOUNDCARD_IOCTL_SET_SAMPLE_RATE, sample_rate);
if (code != 0)
dbgln("Error while setting sample rate to {}: ioctl returned with {}", sample_rate, strerror(code));
return code;
}
u16 Mixer::audiodevice_get_sample_rate() const
{
u16 sample_rate = 0;
int code = ioctl(m_device->fd(), SOUNDCARD_IOCTL_GET_SAMPLE_RATE, &sample_rate);
if (code != 0)
dbgln("Error while getting sample rate: ioctl returned with {}", strerror(code));
return sample_rate;
}
void Mixer::request_setting_sync()
{
if (m_config_write_timer.is_null() || !m_config_write_timer->is_active()) {

3
Userland/Services/AudioServer/Mixer.h
View file

@ -106,6 +106,9 @@ public:
bool is_muted() const { return m_muted; }
void set_muted(bool);
int audiodevice_set_sample_rate(u16 sample_rate);
u16 audiodevice_get_sample_rate() const;
private:
void request_setting_sync();