47990f37d7
In addition to updating the contrib sources the driver now uses the new Component API and will report the internal mixer state. Reporting of the mixer state is enabled by adding the 'report_mixer' attribute to the drivers configuration and setting its value to 'yes'. The following snippets illustrates the format of the report: !<mixer_state> ! <mixer field="inputs.beep" value="108"/> ! <mixer field="outputs.hp_sense" value="plugged"/> ! <mixer field="outputs.master" value="128,128"/> ! <mixer field="outputs.mic_sense" value="unplugged"/> ! <mixer field="outputs.spkr_muters" value="hp,mic"/> !</mixer_state> The mixer state may expose other mixer fields as well, depending on the used sound card. The naming scheme of the attributes intentionally matches the naming scheme of OpenBSD's mixerctl(1) program. Each 'mixer' node can be used to configure the audio driver by using it in its configuration, e.g.: !<config report_mixer="yes"> ! <mixer field="outputs.master" value="255,255"/> !</config> This configuration will set the output volume to the highest possible value. Although it is now also possible to update the configuration at run-time it should not be done while the driver is currently playing or recording because it may provoke the generation of artefacts. Fixes #1973.
60 lines
1.2 KiB
C++
60 lines
1.2 KiB
C++
/*
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* \brief Audio library interface
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* \author Josef Soentgen
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* \date 2014-12-27
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*
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* This header declares the private Audio namespace. It contains
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* functions called by the driver frontend that are implemented
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* by the driver library.
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*/
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/*
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* Copyright (C) 2016 Genode Labs GmbH
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*
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* This file is part of the Genode OS framework, which is distributed
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* under the terms of the GNU General Public License version 2.
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*/
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#ifndef _AUDIO__AUDIO_H_
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#define _AUDIO__AUDIO_H_
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/* Genode includes */
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#include <base/env.h>
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#include <util/xml_node.h>
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/*****************************
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** private Audio namespace **
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*****************************/
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namespace Audio_out {
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enum Channel_number { LEFT, RIGHT, MAX_CHANNELS, INVALID = MAX_CHANNELS };
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}
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namespace Audio_in {
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enum Channel_number { LEFT, MAX_CHANNELS, INVALID = MAX_CHANNELS };
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}
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namespace Audio {
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void update_config(Genode::Xml_node);
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void init_driver(Genode::Env &, Genode::Allocator &, Genode::Xml_node);
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bool driver_active();
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void play_sigh(Genode::Signal_context_capability cap);
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void record_sigh(Genode::Signal_context_capability cap);
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int play(short *data, Genode::size_t size);
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int record(short *data, Genode::size_t size);
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}
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#endif /* _AUDIO__AUDIO_H_ */
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