input.c

VLC Player Source Code

/*****************************************************************************
 * input.c : internal management of input streams for the audio output
 *****************************************************************************
 * Copyright (C) 2002-2007 the VideoLAN team
 * $Id: 24de3d31c9a9eafaedbe74e4a50fde50ea6dfa04 $
 *
 * Authors: Christophe Massiot <[e-mail]>
 *
 * 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 <string.h>
#include <math.h>
#include <assert.h>

#include <vlc_input.h>                 /* for input_thread_t and i_pts_delay */

#ifdef HAVE_ALLOCA_H
#   include <alloca.h>
#endif
#include <vlc_aout.h>

#include "aout_internal.h"

/** FIXME: Ugly but needed to access the counters */
#include "input/input_internal.h"

#define AOUT_ASSERT_MIXER_LOCKED vlc_assert_locked( &p_aout->mixer_lock )
#define AOUT_ASSERT_INPUT_LOCKED vlc_assert_locked( &p_input->lock )

static void inputFailure( aout_instance_t *, aout_input_t *, const char * );
static void inputDrop( aout_instance_t *, aout_input_t *, aout_buffer_t * );
static void inputResamplingStop( aout_input_t *p_input );

static int VisualizationCallback( vlc_object_t *, char const *,
                                  vlc_value_t, vlc_value_t, void * );
static int EqualizerCallback( vlc_object_t *, char const *,
                              vlc_value_t, vlc_value_t, void * );
static int ReplayGainCallback( vlc_object_t *, char const *,
                               vlc_value_t, vlc_value_t, void * );
static void ReplayGainSelect( aout_instance_t *, aout_input_t * );
/*****************************************************************************
 * aout_InputNew : allocate a new input and rework the filter pipeline
 *****************************************************************************/
int aout_InputNew( aout_instance_t * p_aout, aout_input_t * p_input )
{
    audio_sample_format_t chain_input_format;
    audio_sample_format_t chain_output_format;
    vlc_value_t val, text;
    char * psz_filters, *psz_visual;
    int i_visual;

    aout_FormatPrint( p_aout, "input", &p_input->input );

    p_input->i_nb_resamplers = p_input->i_nb_filters = 0;

    /* Prepare FIFO. */
    aout_FifoInit( p_aout, &p_input->fifo, p_aout->mixer.mixer.i_rate );
    p_input->p_first_byte_to_mix = NULL;

    /* Prepare format structure */
    memcpy( &chain_input_format, &p_input->input,
            sizeof(audio_sample_format_t) );
    memcpy( &chain_output_format, &p_aout->mixer.mixer,
            sizeof(audio_sample_format_t) );
    chain_output_format.i_rate = p_input->input.i_rate;
    aout_FormatPrepare( &chain_output_format );

    /* Now add user filters */
    if( var_Type( p_aout, "visual" ) == 0 )
    {
        var_Create( p_aout, "visual", VLC_VAR_STRING | VLC_VAR_HASCHOICE );
        text.psz_string = _("Visualizations");
        var_Change( p_aout, "visual", VLC_VAR_SETTEXT, &text, NULL );
        val.psz_string = (char*)""; text.psz_string = _("Disable");
        var_Change( p_aout, "visual", VLC_VAR_ADDCHOICE, &val, &text );
        val.psz_string = (char*)"spectrometer"; text.psz_string = _("Spectrometer");
        var_Change( p_aout, "visual", VLC_VAR_ADDCHOICE, &val, &text );
        val.psz_string = (char*)"scope"; text.psz_string = _("Scope");
        var_Change( p_aout, "visual", VLC_VAR_ADDCHOICE, &val, &text );
        val.psz_string = (char*)"spectrum"; text.psz_string = _("Spectrum");
        var_Change( p_aout, "visual", VLC_VAR_ADDCHOICE, &val, &text );
        val.psz_string = (char*)"vuMeter"; text.psz_string = _("Vu meter");
        var_Change( p_aout, "visual", VLC_VAR_ADDCHOICE, &val, &text );

        /* Look for goom plugin */
        if( module_Exists( VLC_OBJECT(p_aout), "goom" ) )
        {
            val.psz_string = (char*)"goom"; text.psz_string = (char*)"Goom";
            var_Change( p_aout, "visual", VLC_VAR_ADDCHOICE, &val, &text );
        }

        /* Look for galaktos plugin */
        if( module_Exists( VLC_OBJECT(p_aout), "galaktos" ) )
        {
            val.psz_string = (char*)"galaktos"; text.psz_string = (char*)"GaLaktos";
            var_Change( p_aout, "visual", VLC_VAR_ADDCHOICE, &val, &text );
        }

        if( var_Get( p_aout, "effect-list", &val ) == VLC_SUCCESS )
        {
            var_Set( p_aout, "visual", val );
            free( val.psz_string );
        }
        var_AddCallback( p_aout, "visual", VisualizationCallback, NULL );
    }

    if( var_Type( p_aout, "equalizer" ) == 0 )
    {
        module_config_t *p_config;
        int i;

        p_config = config_FindConfig( VLC_OBJECT(p_aout), "equalizer-preset" );
        if( p_config && p_config->i_list )
        {
               var_Create( p_aout, "equalizer",
                           VLC_VAR_STRING | VLC_VAR_HASCHOICE );
            text.psz_string = _("Equalizer");
            var_Change( p_aout, "equalizer", VLC_VAR_SETTEXT, &text, NULL );

            val.psz_string = (char*)""; text.psz_string = _("Disable");
            var_Change( p_aout, "equalizer", VLC_VAR_ADDCHOICE, &val, &text );

            for( i = 0; i < p_config->i_list; i++ )
            {
                val.psz_string = (char *)p_config->ppsz_list[i];
                text.psz_string = (char *)p_config->ppsz_list_text[i];
                var_Change( p_aout, "equalizer", VLC_VAR_ADDCHOICE,
                            &val, &text );
            }

            var_AddCallback( p_aout, "equalizer", EqualizerCallback, NULL );
        }
    }

    if( var_Type( p_aout, "audio-filter" ) == 0 )
    {
        var_Create( p_aout, "audio-filter",
                    VLC_VAR_STRING | VLC_VAR_DOINHERIT );
        text.psz_string = _("Audio filters");
        var_Change( p_aout, "audio-filter", VLC_VAR_SETTEXT, &text, NULL );
    }
    if( var_Type( p_aout, "audio-visual" ) == 0 )
    {
        var_Create( p_aout, "audio-visual",
                    VLC_VAR_STRING | VLC_VAR_DOINHERIT );
        text.psz_string = _("Audio visualizations");
        var_Change( p_aout, "audio-visual", VLC_VAR_SETTEXT, &text, NULL );
    }

    if( var_Type( p_aout, "audio-replay-gain-mode" ) == 0 )
    {
        module_config_t *p_config;
        int i;

        p_config = config_FindConfig( VLC_OBJECT(p_aout), "audio-replay-gain-mode" );
        if( p_config && p_config->i_list )
        {
            var_Create( p_aout, "audio-replay-gain-mode",
                        VLC_VAR_STRING | VLC_VAR_DOINHERIT );

            text.psz_string = _("Replay gain");
            var_Change( p_aout, "audio-replay-gain-mode", VLC_VAR_SETTEXT, &text, NULL );

            for( i = 0; i < p_config->i_list; i++ )
            {
                val.psz_string = (char *)p_config->ppsz_list[i];
                text.psz_string = (char *)p_config->ppsz_list_text[i];
                var_Change( p_aout, "audio-replay-gain-mode", VLC_VAR_ADDCHOICE,
                            &val, &text );
            }

            var_AddCallback( p_aout, "audio-replay-gain-mode", ReplayGainCallback, NULL );
        }
    }
    if( var_Type( p_aout, "audio-replay-gain-preamp" ) == 0 )
    {
        var_Create( p_aout, "audio-replay-gain-preamp",
                    VLC_VAR_FLOAT | VLC_VAR_DOINHERIT );
    }
    if( var_Type( p_aout, "audio-replay-gain-default" ) == 0 )
    {
        var_Create( p_aout, "audio-replay-gain-default",
                    VLC_VAR_FLOAT | VLC_VAR_DOINHERIT );
    }
    if( var_Type( p_aout, "audio-replay-gain-peak-protection" ) == 0 )
    {
        var_Create( p_aout, "audio-replay-gain-peak-protection",
                    VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
    }

    var_Get( p_aout, "audio-filter", &val );
    psz_filters = val.psz_string;
    var_Get( p_aout, "audio-visual", &val );
    psz_visual = val.psz_string;

    /* parse user filter lists */
    for( i_visual = 0; i_visual < 2; i_visual++ )
    {
        char *psz_next = NULL;
        char *psz_parser = i_visual ? psz_visual : psz_filters;

        if( psz_parser == NULL || !*psz_parser )
            continue;

        while( psz_parser && *psz_parser )
        {
            aout_filter_t * p_filter = NULL;

            if( p_input->i_nb_filters >= AOUT_MAX_FILTERS )
            {
                msg_Dbg( p_aout, "max filters reached (%d)", AOUT_MAX_FILTERS );
                break;
            }

            while( *psz_parser == ' ' && *psz_parser == ':' )
            {
                psz_parser++;
            }
            if( ( psz_next = strchr( psz_parser , ':'  ) ) )
            {
                *psz_next++ = '\0';
            }
            if( *psz_parser =='\0' )
            {
                break;
            }

            /* Create a VLC object */
            static const char typename[] = "audio filter";
            p_filter = vlc_custom_create( p_aout, sizeof(*p_filter),
                                          VLC_OBJECT_GENERIC, typename );
            if( p_filter == NULL )
            {
                msg_Err( p_aout, "cannot add user filter %s (skipped)",
                         psz_parser );
                psz_parser = psz_next;
                continue;
            }

            vlc_object_attach( p_filter , p_aout );

            /* try to find the requested filter */
            if( i_visual == 1 ) /* this can only be a visualization module */
            {
                /* request format */
                memcpy( &p_filter->input, &chain_output_format,
                        sizeof(audio_sample_format_t) );
                memcpy( &p_filter->output, &chain_output_format,
                        sizeof(audio_sample_format_t) );

                p_filter->p_module = module_Need( p_filter, "visualization",
                                                  psz_parser, true );
            }
            else /* this can be a audio filter module as well as a visualization module */
            {
                /* request format */
                memcpy( &p_filter->input, &chain_input_format,
                        sizeof(audio_sample_format_t) );
                memcpy( &p_filter->output, &chain_output_format,
                        sizeof(audio_sample_format_t) );

                p_filter->p_module = module_Need( p_filter, "audio filter",
                                              psz_parser, true );

                if ( p_filter->p_module == NULL )
                {
                    /* if the filter requested a special format, retry */
                    if ( !( AOUT_FMTS_IDENTICAL( &p_filter->input,
                                                 &chain_input_format )
                            && AOUT_FMTS_IDENTICAL( &p_filter->output,
                                                    &chain_output_format ) ) )
                    {
                        aout_FormatPrepare( &p_filter->input );
                        aout_FormatPrepare( &p_filter->output );
                        p_filter->p_module = module_Need( p_filter,
                                                          "audio filter",
                                                          psz_parser, true );
                    }
                    /* try visual filters */
                    else
                    {
                        memcpy( &p_filter->input, &chain_output_format,
                                sizeof(audio_sample_format_t) );
                        memcpy( &p_filter->output, &chain_output_format,
                                sizeof(audio_sample_format_t) );
                        p_filter->p_module = module_Need( p_filter,