Re: [Bluez-devel] audio & dbus

[Brad Midgley <bmidgley@xmission.com>]

Marcel

> So what you need is some kind of capabilities command and then you can
> use this to create instances for all devices. So my proposal would be
> that we use org.bluez.Audio as a configuration interface (like Manager)
> and then org.bluez.Headset to actually connect, disconnect etc.

Ok... whatever it takes so the Play method is not ambiguous. I was 
preparing to do all kinds of acrobatics to figure out what was intended 
when changing the volume without a device connected but with the manager 
idea that won't be so complicated.

I have looked over Manager but I need to examine the code to get a 
better feel for this.

> No. Use IncreaseVolume and DecreaseVolume.

I was looking over my notes and the HSP profile and couldn't see the 
need for these. I left them out but do we need them? Do we treat mic 
gain this way too?

I started using Gain below instead of Volume since it applies to both 
speaker and mic.

> 
>> 		void AddWiredVoice()
>>
>> 			Add wired audio output to the voice routing rule
>>
>> 		void RemoveWiredVoice()
>>
>> 			Remove wired audio output from the voice routing
>> 			rule
> 
> Not needed at all. This is not our business and the PCM routing will be
> a parameter to the daemon. No need to support PCM and HCI routing at the
> same time.

hmm... this is actually for interacting with the builtin speaker. Johan 
mentioned the scenario of custom ringing both the headset and the 
speaker simultaneously and there are other scenarios we would need to 
interact with builtin audio (for example, to get a mic input with 
today's a2dp headsets you would use the built-in mic)


Headset hierarchy (experimental)
==============================

Service		org.bluez
Interface	org.bluez.Headset

Methods		void Connect(string identifier)

			Opens the control connection to an audio device.
			Will not open the audio channel until requested
			by the audio plugin or directly from the
			application.

		void Disconnect(string identifier)

			Stops audio if it was playing and closes the
			control connection to the audio device.

		void Play(string identifier)

			Opens the audio stream. Called from the audio
			plugin or from the application if audio is
			routed somewhere other than the daemon (eg
			through PCM, direct to the DSP).

		void Stop(string identifier)

		void Pause(string identifier)

		void Resume(string identifier)

		void SetTimeout(string identifier, uint32 timeout)

			Set the idle Stop for the device.

			Only applicable when audio is routed through the
			daemon. Stop the stream and emit a signal if
			timeout elapses without any audio being sent
			to the daemon from an application. A value of 0
			indicates no idle stop; this is the default.

		uint32 GetTimeout(string identifier)

		uint16 GetSpeakerGain(string identifier)

		uint16 GetMicrophoneGain(string identifier)

		void SetSpeakerGain(string identifier, uint16 gain)

			Gain is 0..15

		void SetMicrophoneGain(string identifier, uint16 gain)

			Gain is 0..15

		void AddWiredVoice()

			Add wired audio output to the voice routing rule

		void RemoveWiredVoice()

			Remove wired audio output from the voice routing
			rule

		void RingHeadset()

			Indicate a single RING to the connected headset.

		void PressHeadsetButton()

			Indicate a button press to the connected audio
			gateway.

Signals		void Connected()

			Indicate device and profile.

		void Disconnected()
		
			Indicate device and profile.

		void Playing()

			Indicate device and profile.

		void Stopped()

			Indicate device and profile.

		void Paused()

			Indicate device and profile.

		void Resumed()

			Indicate device and profile.

		void TimeoutChanged()

			Indicate the new idle, device, profile

		void SpeakerGainChanged()

			Indicate new gain, device, profile.

		void MicrophoneGainChanged()

			Indicate new gain, device, profile.

		void WiredVoiceAdded()

			Indicated when wired audio is added to the
			voice route, also automatically when a SCO
			set is disconnected.

		void WiredVoiceRemoved()

			Indicated when wired audio is removed from
			the voice route, also automatically when a
			SCO set is connected.

		void HeadsetRang()

			Indicates the audio gateway has sent a ring.

		void HeadsetButtonPressed()

			Indicates the headset button was pressed.

Brad

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