146 lines
4 KiB
C
146 lines
4 KiB
C
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/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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* $Id$
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*
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* Audio signal path management APIs
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*
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* Copyright (C) 2007 by Michael Sevakis
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*
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* All files in this archive are subject to the GNU General Public License.
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* See the file COPYING in the source tree root for full license agreement.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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#include "system.h"
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#include "cpu.h"
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#include "audio.h"
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#include "general.h"
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#include "settings.h"
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#if defined(HAVE_SPDIF_IN) || defined(HAVE_SPDIF_OUT)
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#ifdef HAVE_SPDIF_POWER
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#include "power.h"
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#endif
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#include "spdif.h"
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#endif
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#if CONFIG_TUNER
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#include "radio.h"
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#endif
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/* Some audio sources may require a boosted CPU */
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#ifdef HAVE_ADJUSTABLE_CPU_FREQ
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#ifdef HAVE_SPDIF_REC
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#define AUDIO_CPU_BOOST
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#endif
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#endif
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#ifndef SIMULATOR
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#ifdef AUDIO_CPU_BOOST
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static void audio_cpu_boost(bool state)
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{
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static bool cpu_boosted = false;
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if (state != cpu_boosted)
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{
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cpu_boost(state);
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cpu_boosted = state;
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}
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} /* audio_cpu_boost */
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#endif /* AUDIO_CPU_BOOST */
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/**
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* Selects an audio source for recording or playback
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* powers/unpowers related devices and sets up monitoring.
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*/
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void audio_set_input_source(int source, unsigned flags)
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{
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/** Do power up/down of associated device(s) **/
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/** SPDIF **/
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#ifdef AUDIO_CPU_BOOST
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/* Always boost for SPDIF */
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audio_cpu_boost(source == AUDIO_SRC_SPDIF);
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#endif /* AUDIO_CPU_BOOST */
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#ifdef HAVE_SPDIF_POWER
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/* Check if S/PDIF output power should be switched off or on. NOTE: assumes
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both optical in and out is controlled by the same power source, which is
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the case on H1x0. */
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spdif_power_enable((source == AUDIO_SRC_SPDIF) ||
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global_settings.spdif_enable);
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#endif /* HAVE_SPDIF_POWER */
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/* Set the appropriate feed for spdif output */
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#ifdef HAVE_SPDIF_OUT
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spdif_set_output_source(source
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IF_SPDIF_POWER_(, global_settings.spdif_enable));
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#endif /* HAVE_SPDIF_OUT */
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/** Tuner **/
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#if CONFIG_TUNER
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/* Switch radio off or on per source and flags. */
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if (source != AUDIO_SRC_FMRADIO)
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radio_stop();
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else if (flags & SRCF_FMRADIO_PAUSED)
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radio_pause();
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else
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radio_start();
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#endif
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/* set hardware inputs */
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audio_input_mux(source, flags);
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} /* audio_set_source */
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#ifdef HAVE_SPDIF_IN
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/**
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* Return SPDIF sample rate index in audio_master_sampr_list. Since we base
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* our reading on the actual SPDIF sample rate (which might be a bit
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* inaccurate), we round off to the closest sample rate that is supported by
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* SPDIF.
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*/
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int audio_get_spdif_sample_rate(void)
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{
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unsigned long measured_rate = spdif_measure_frequency();
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/* Find which SPDIF sample rate we're closest to. */
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return round_value_to_list32(measured_rate, audio_master_sampr_list,
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SAMPR_NUM_FREQ, false);
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} /* audio_get_spdif_sample_rate */
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#endif /* HAVE_SPDIF_IN */
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#else /* SIMULATOR */
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/** Sim stubs **/
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#ifdef AUDIO_CPU_BOOST
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static void audio_cpu_boost(bool state)
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{
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(void)state;
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} /* audio_cpu_boost */
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#endif /* AUDIO_CPU_BOOST */
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void audio_set_output_source(int source)
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{
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(void)source;
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} /* audio_set_output_source */
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void audio_set_input_source(int source, unsigned flags)
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{
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(void)source;
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(void)flags;
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} /* audio_set_input_source */
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#ifdef HAVE_SPDIF_IN
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int audio_get_spdif_sample_rate(void)
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{
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return FREQ_44;
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} /* audio_get_spdif_sample_rate */
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#endif /* HAVE_SPDIF_IN */
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#endif /* !SIMULATOR */
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