/***************************************************************************** * intf.c : audio output API towards the interface modules ***************************************************************************** * Copyright (C) 2002-2007 the VideoLAN team * $Id$ * * Authors: Christophe Massiot <massiot@via.ecp.fr> * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA. *****************************************************************************/ /***************************************************************************** * Preamble *****************************************************************************/ #ifdef HAVE_CONFIG_H # include "config.h" #endif #include <vlc_common.h> #include <stdio.h> #include <stdlib.h> /* calloc(), malloc(), free() */ #include <string.h> #include <vlc_aout.h> #include "aout_internal.h" /* * Volume management * * The hardware volume cannot be set if the output module gets deleted, so * we must take the mixer lock. The software volume cannot be set while the * mixer is running, so we need the mixer lock (too). * * Here is a schematic of the i_volume range : * * |------------------------------+---------------------------------------| * 0 pi_soft 1024 * * Between 0 and pi_soft, the volume is done in hardware by the output * module. Above, the output module will change p_aout->mixer.i_multiplier * (done in software). This scaling may result * in cropping errors and * should be avoided as much as possible. * * It is legal to have *pi_soft == 0, and do everything in software. * It is also legal to have *pi_soft == 1024, and completely avoid * software scaling. However, some streams (esp. A/52) are encoded with * a very low volume and users may complain. */ /***************************************************************************** * aout_VolumeGet : get the volume of the output device *****************************************************************************/ int __aout_VolumeGet( vlc_object_t * p_object, audio_volume_t * pi_volume ) { int i_result = 0; aout_instance_t * p_aout = vlc_object_find( p_object, VLC_OBJECT_AOUT, FIND_ANYWHERE ); if ( pi_volume == NULL ) return -1; if ( p_aout == NULL ) { *pi_volume = (audio_volume_t)config_GetInt( p_object, "volume" ); return 0; } aout_lock_mixer( p_aout ); if ( !p_aout->mixer.b_error ) { i_result = p_aout->output.pf_volume_get( p_aout, pi_volume ); } else { *pi_volume = (audio_volume_t)config_GetInt( p_object, "volume" ); } aout_unlock_mixer( p_aout ); vlc_object_release( p_aout ); return i_result; } /***************************************************************************** * aout_VolumeSet : set the volume of the output device *****************************************************************************/ int __aout_VolumeSet( vlc_object_t * p_object, audio_volume_t i_volume ) { aout_instance_t *p_aout = vlc_object_find( p_object, VLC_OBJECT_AOUT, FIND_ANYWHERE ); int i_result = 0; config_PutInt( p_object, "volume", i_volume ); var_SetBool( p_object->p_libvlc, "volume-change", true ); if ( p_aout == NULL ) return 0; aout_lock_mixer( p_aout ); if ( !p_aout->mixer.b_error ) { i_result = p_aout->output.pf_volume_set( p_aout, i_volume ); } aout_unlock_mixer( p_aout ); var_SetBool( p_aout, "intf-change", true ); vlc_object_release( p_aout ); return i_result; } /***************************************************************************** * aout_VolumeInfos : get the boundary pi_soft *****************************************************************************/ int __aout_VolumeInfos( vlc_object_t * p_object, audio_volume_t * pi_soft ) { aout_instance_t * p_aout = vlc_object_find( p_object, VLC_OBJECT_AOUT, FIND_ANYWHERE ); int i_result; if ( p_aout == NULL ) return 0; aout_lock_mixer( p_aout ); if ( p_aout->mixer.b_error ) { /* The output module is destroyed. */ i_result = -1; } else { i_result = p_aout->output.pf_volume_infos( p_aout, pi_soft ); } aout_unlock_mixer( p_aout ); vlc_object_release( p_aout ); return i_result; } /***************************************************************************** * aout_VolumeUp : raise the output volume ***************************************************************************** * If pi_volume != NULL, *pi_volume will contain the volume at the end of the * function. *****************************************************************************/ int __aout_VolumeUp( vlc_object_t * p_object, int i_nb_steps, audio_volume_t * pi_volume ) { aout_instance_t * p_aout = vlc_object_find( p_object, VLC_OBJECT_AOUT, FIND_ANYWHERE ); int i_result = 0, i_volume = 0, i_volume_step = 0; i_volume_step = config_GetInt( p_object->p_libvlc, "volume-step" ); i_volume = config_GetInt( p_object, "volume" ); i_volume += i_volume_step * i_nb_steps; if ( i_volume > AOUT_VOLUME_MAX ) { i_volume = AOUT_VOLUME_MAX; } config_PutInt( p_object, "volume", i_volume ); var_Create( p_object->p_libvlc, "saved-volume", VLC_VAR_INTEGER ); var_SetInteger( p_object->p_libvlc, "saved-volume" , (audio_volume_t) i_volume ); if ( pi_volume != NULL ) *pi_volume = (audio_volume_t) i_volume; var_SetBool( p_object->p_libvlc, "volume-change", true ); if ( p_aout == NULL ) return 0; aout_lock_mixer( p_aout ); if ( !p_aout->mixer.b_error ) { i_result = p_aout->output.pf_volume_set( p_aout, (audio_volume_t) i_volume ); } aout_unlock_mixer( p_aout ); vlc_object_release( p_aout ); return i_result; } /***************************************************************************** * aout_VolumeDown : lower the output volume ***************************************************************************** * If pi_volume != NULL, *pi_volume will contain the volume at the end of the * function. *****************************************************************************/ int __aout_VolumeDown( vlc_object_t * p_object, int i_nb_steps, audio_volume_t * pi_volume ) { aout_instance_t * p_aout = vlc_object_find( p_object, VLC_OBJECT_AOUT, FIND_ANYWHERE ); int i_result = 0, i_volume = 0, i_volume_step = 0; i_volume_step = config_GetInt( p_object->p_libvlc, "volume-step" ); i_volume = config_GetInt( p_object, "volume" ); i_volume -= i_volume_step * i_nb_steps; if ( i_volume < AOUT_VOLUME_MIN ) { i_volume = AOUT_VOLUME_MIN; } config_PutInt( p_object, "volume", i_volume ); var_Create( p_object->p_libvlc, "saved-volume", VLC_VAR_INTEGER ); var_SetInteger( p_object->p_libvlc, "saved-volume", (audio_volume_t) i_volume ); if ( pi_volume != NULL ) *pi_volume = (audio_volume_t) i_volume; var_SetBool( p_object->p_libvlc, "volume-change", true ); if ( p_aout == NULL ) return 0; aout_lock_mixer( p_aout ); if ( !p_aout->mixer.b_error ) { i_result = p_aout->output.pf_volume_set( p_aout, (audio_volume_t) i_volume ); } aout_unlock_mixer( p_aout ); vlc_object_release( p_aout ); return i_result; } /***************************************************************************** * aout_VolumeMute : Mute/un-mute the output volume ***************************************************************************** * If pi_volume != NULL, *pi_volume will contain the volume at the end of the * function (muted => 0). *****************************************************************************/ int __aout_VolumeMute( vlc_object_t * p_object, audio_volume_t * pi_volume ) { int i_result; audio_volume_t i_volume; i_volume = (audio_volume_t)config_GetInt( p_object, "volume" ); if ( i_volume != 0 ) { /* Mute */ i_result = aout_VolumeSet( p_object, AOUT_VOLUME_MIN ); var_Create( p_object->p_libvlc, "saved-volume", VLC_VAR_INTEGER ); var_SetInteger( p_object->p_libvlc, "saved-volume", (int)i_volume ); if ( pi_volume != NULL ) *pi_volume = AOUT_VOLUME_MIN; } else { /* Un-mute */ var_Create( p_object->p_libvlc, "saved-volume", VLC_VAR_INTEGER ); i_volume = (audio_volume_t)var_GetInteger( p_object->p_libvlc, "saved-volume" ); i_result = aout_VolumeSet( p_object, i_volume ); if ( pi_volume != NULL ) *pi_volume = i_volume; } return i_result; } /* * The next functions are not supposed to be called by the interface, but * are placeholders for software-only scaling. */ /* Meant to be called by the output plug-in's Open(). */ void aout_VolumeSoftInit( aout_instance_t * p_aout ) { int i_volume; p_aout->output.pf_volume_infos = aout_VolumeSoftInfos; p_aout->output.pf_volume_get = aout_VolumeSoftGet; p_aout->output.pf_volume_set = aout_VolumeSoftSet; i_volume = config_GetInt( p_aout, "volume" ); if ( i_volume < AOUT_VOLUME_MIN ) { i_volume = AOUT_VOLUME_DEFAULT; } else if ( i_volume > AOUT_VOLUME_MAX ) { i_volume = AOUT_VOLUME_MAX; } aout_VolumeSoftSet( p_aout, (audio_volume_t)i_volume ); } /* Placeholder for pf_volume_infos(). */ int aout_VolumeSoftInfos( aout_instance_t * p_aout, audio_volume_t * pi_soft ) { (void)p_aout; *pi_soft = 0; return 0; } /* Placeholder for pf_volume_get(). */ int aout_VolumeSoftGet( aout_instance_t * p_aout, audio_volume_t * pi_volume ) { *pi_volume = p_aout->output.i_volume; return 0; } /* Placeholder for pf_volume_set(). */ int aout_VolumeSoftSet( aout_instance_t * p_aout, audio_volume_t i_volume ) { aout_MixerMultiplierSet( p_aout, (float)i_volume / AOUT_VOLUME_DEFAULT ); p_aout->output.i_volume = i_volume; return 0; } /* * The next functions are not supposed to be called by the interface, but * are placeholders for unsupported scaling. */ /* Meant to be called by the output plug-in's Open(). */ void aout_VolumeNoneInit( aout_instance_t * p_aout ) { p_aout->output.pf_volume_infos = aout_VolumeNoneInfos; p_aout->output.pf_volume_get = aout_VolumeNoneGet; p_aout->output.pf_volume_set = aout_VolumeNoneSet; } /* Placeholder for pf_volume_infos(). */ int aout_VolumeNoneInfos( aout_instance_t * p_aout, audio_volume_t * pi_soft ) { (void)p_aout; (void)pi_soft; return -1; } /* Placeholder for pf_volume_get(). */ int aout_VolumeNoneGet( aout_instance_t * p_aout, audio_volume_t * pi_volume ) { (void)p_aout; (void)pi_volume; return -1; } /* Placeholder for pf_volume_set(). */ int aout_VolumeNoneSet( aout_instance_t * p_aout, audio_volume_t i_volume ) { (void)p_aout; (void)i_volume; return -1; } /* * Pipelines management */ /***************************************************************************** * aout_Restart : re-open the output device and rebuild the input and output * pipelines ***************************************************************************** * This function is used whenever the parameters of the output plug-in are * changed (eg. selecting S/PDIF or PCM). *****************************************************************************/ static int aout_Restart( aout_instance_t * p_aout ) { int i; bool b_error = 0; aout_lock_mixer( p_aout ); if ( p_aout->i_nb_inputs == 0 ) { aout_unlock_mixer( p_aout ); msg_Err( p_aout, "no decoder thread" ); return -1; } /* Lock all inputs. */ aout_lock_input_fifos( p_aout ); for ( i = 0; i < p_aout->i_nb_inputs; i++ ) { aout_lock_input( p_aout, p_aout->pp_inputs[i] ); aout_InputDelete( p_aout, p_aout->pp_inputs[i] ); } aout_MixerDelete( p_aout ); /* Re-open the output plug-in. */ aout_OutputDelete( p_aout ); if ( aout_OutputNew( p_aout, &p_aout->pp_inputs[0]->input ) == -1 ) { /* Release all locks and report the error. */ for ( i = 0; i < p_aout->i_nb_inputs; i++ ) { vlc_mutex_unlock( &p_aout->pp_inputs[i]->lock ); } aout_unlock_input_fifos( p_aout ); aout_unlock_mixer( p_aout ); return -1; } if ( aout_MixerNew( p_aout ) == -1 ) { aout_OutputDelete( p_aout ); for ( i = 0; i < p_aout->i_nb_inputs; i++ ) { vlc_mutex_unlock( &p_aout->pp_inputs[i]->lock ); } aout_unlock_input_fifos( p_aout ); aout_unlock_mixer( p_aout ); return -1; } /* Re-open all inputs. */ for ( i = 0; i < p_aout->i_nb_inputs; i++ ) { aout_input_t * p_input = p_aout->pp_inputs[i]; b_error |= aout_InputNew( p_aout, p_input, &p_input->request_vout ); p_input->b_changed = 1; aout_unlock_input( p_aout, p_input ); } aout_unlock_input_fifos( p_aout ); aout_unlock_mixer( p_aout ); return b_error; } /***************************************************************************** * aout_FindAndRestart : find the audio output instance and restart ***************************************************************************** * This is used for callbacks of the configuration variables, and we believe * that when those are changed, it is a significant change which implies * rebuilding the audio-device and audio-channels variables. *****************************************************************************/ int aout_FindAndRestart( vlc_object_t * p_this, const char *psz_name, vlc_value_t oldval, vlc_value_t newval, void *p_data ) { aout_instance_t * p_aout = vlc_object_find( p_this, VLC_OBJECT_AOUT, FIND_ANYWHERE ); (void)psz_name; (void)oldval; (void)newval; (void)p_data; if ( p_aout == NULL ) return VLC_SUCCESS; if ( var_Type( p_aout, "audio-device" ) != 0 ) { var_Destroy( p_aout, "audio-device" ); } if ( var_Type( p_aout, "audio-channels" ) != 0 ) { var_Destroy( p_aout, "audio-channels" ); } aout_Restart( p_aout ); vlc_object_release( p_aout ); return VLC_SUCCESS; } /***************************************************************************** * aout_ChannelsRestart : change the audio device or channels and restart *****************************************************************************/ int aout_ChannelsRestart( vlc_object_t * p_this, const char * psz_variable, vlc_value_t oldval, vlc_value_t newval, void *p_data ) { aout_instance_t * p_aout = (aout_instance_t *)p_this; (void)oldval; (void)newval; (void)p_data; if ( !strcmp( psz_variable, "audio-device" ) ) { /* This is supposed to be a significant change and supposes * rebuilding the channel choices. */ if ( var_Type( p_aout, "audio-channels" ) >= 0 ) { var_Destroy( p_aout, "audio-channels" ); } } aout_Restart( p_aout ); return 0; } /** Enable or disable an audio filter * \param p_this a vlc object * \param psz_name name of the filter * \param b_add are we adding or removing the filter ? */ void aout_EnableFilter( vlc_object_t *p_this, const char *psz_name, bool b_add ) { aout_instance_t *p_aout = vlc_object_find( p_this, VLC_OBJECT_AOUT, FIND_ANYWHERE ); if( AoutChangeFilterString( p_this, p_aout, "audio-filter", psz_name, b_add ) ) { if( p_aout ) AoutInputsMarkToRestart( p_aout ); } if( p_aout ) vlc_object_release( p_aout ); } /** * Change audio visualization * -1 goes backwards, +1 goes forward */ char *aout_VisualChange( vlc_object_t *p_this, int i_skip ) { (void)p_this; (void)i_skip; msg_Err( p_this, "FIXME: %s (%s %d) isn't implemented.", __func__, __FILE__, __LINE__ ); return strdup("foobar"); }