non/timeline/src/Audio_Sequence.C

/*******************************************************************************/
/* Copyright (C) 2008 Jonathan Moore Liles                                     */
/*                                                                             */
/* 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; see the file COPYING.  If not,write to the Free Software */
/* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
/*******************************************************************************/

/* An Audio_Sequence is a sequence of Audio_Regions. Takes and 'track
 * contents' consist of these objects */

#include "debug.h"

#include <sys/time.h>
#include <FL/fl_ask.H>
#include <FL/Fl.H>
#include "Audio_Sequence.H"
#include "Waveform.H"

#include <list>
using namespace std;

#include "Track.H"

#include "Engine/Audio_File.H" // for ::from_file()
#include "Transport.H" // for locate()

#include <errno.h>



Audio_Sequence::Audio_Sequence ( Track *track, const char *name ) : Sequence( track )
{
    _track = track;

    if ( name )
        Audio_Sequence::name( name );
    else
    {
        struct timeval tv;

        gettimeofday( &tv, NULL );

        time_t t = tv.tv_sec;

        char s[40];

        ctime_r( &t, s );

        s[ strlen( s ) - 1 ] = 0;

        Audio_Sequence::name( s );
    }

    if ( track )
        track->add( this );

    log_create();

    /* FIXME: temporary  */
    labeltype( FL_NO_LABEL );

}


Audio_Sequence::~Audio_Sequence ( )
{
    Loggable::block_start();

    clear();

    log_destroy();

    track()->remove( this );

    Loggable::block_end();
}



/** return a pointer to the current capture region for this sequence */
const Audio_Region *
Audio_Sequence::capture_region ( void ) const
{
    return track()->capture_region();
}

void
Audio_Sequence::get ( Log_Entry &e ) const
{
    e.add( ":track", _track );
    e.add( ":name", name() );
}

void
Audio_Sequence::set ( Log_Entry &e )
{
    for ( int i = 0; i < e.size(); ++i )
    {
        const char *s, *v;

        e.get( i, &s, &v );

        if ( ! strcmp( ":track", s ) )
        {
            int i;
            sscanf( v, "%X", &i );
            Track *t = (Track*)Loggable::find( i );

            assert( t );

            t->sequence( this );
        }
        else if ( ! strcmp( ":name", s ) )
            name( v );
    }
}


static
void
deurlify ( char *url )
{
    char *r, *w;

    r = w = url;

    for ( ; *r; r++, w++ )
    {
        if ( *r == '%' )
        {
            char data[3] = { *(r + 1), *(r + 2), 0 };

            int c;

            sscanf( data, "%2X", &c );

            *w = c;

            r += 2;
        }
        else
            *w = *r;
    }

    *w = 0;
}

void
Audio_Sequence::handle_widget_change ( nframes_t start, nframes_t length )
{
    Sequence::handle_widget_change( start, length );

    /* a region has changed. we may need to rebuffer... */

    /* trigger rebuffer */
    /* FIXME: we really only need to rebuffer *this* sequence! */
    /* FIXME: how does this fit into the selection? */

    if ( transport->rolling && ( start > transport->frame || start + length > transport->frame ) )
        transport->locate( transport->frame );
}

void
Audio_Sequence::draw ( void )
{

    Sequence::draw();

    int xfades = 0;

    /* draw crossfades */
    for ( list <Sequence_Widget *>::const_iterator r = _widgets.begin();  r != _widgets.end(); r++ )
    {
        Sequence_Widget *o = overlaps( *r );

        if ( o )
        {
            if ( *o <= **r )
            {

/*                 if ( o->x() == (*r)->x() && o->w() == (*r)->w() ) */
/*                     printf( "complete superposition\n" ); */

                if ( o->contains( *r ) )
                    /* completely inside */
                    continue;

                ++xfades;

                Rectangle b( (*r)->x(),
                             o->y(),
                             (o->x() + o->w()) - (*r)->x(),
                             o->h() );

                /* Fl_Color c = fl_color_average( o->color(), (*r)->color(), 0.50f ); */
                /* c = fl_color_average( c, FL_YELLOW, 0.30f ); */
                
                /* Fl_Color c = fl_color_add_alpha( FL_YELLOW, 50 ); */
                Fl_Color c = FL_YELLOW;

                /* fl_push_use_cairo( true ); */

                fl_push_clip( b.x, b.y, b.w, b.h );

                draw_box( FL_FLAT_BOX, b.x - 100, b.y, b.w + 200, b.h, c );
                draw_box( FL_UP_FRAME, b.x - 100, b.y, b.w + 200, b.h, c );

                fl_pop_clip();

                /* fl_pop_use_cairo(); */
            }
        }

    }

    for ( list <Sequence_Widget *>::const_iterator r = _widgets.begin();  r != _widgets.end(); r++ )
    {
        Sequence_Widget *o = overlaps( *r );

        if ( o )
        {
            if ( *o <= **r )
            {

                if ( o->contains( *r ) )
                    /* completely inside */
                    continue;

                Rectangle b( (*r)->x(), o->y(), (o->x() + o->w()) - (*r)->x(), o->h() );

                /* draw overlapping waveforms in X-ray style. */
                /* bool t = Waveform::fill; */

                /* Waveform::fill = false; */

                fl_push_clip( b.x, b.y, b.w, b.h );

                o->draw();
                (*r)->draw();

                fl_pop_clip();
                /* Waveform::fill = t; */
            }
        }
    }
}

/** event handler that supports DND of audio clips */
int
Audio_Sequence::handle ( int m )
{
    switch ( m )
    {
        case FL_PASTE:
        {
            const char *text = Fl::event_text();

            if ( ! strcmp( text, "Audio_Region" ) )
                return 1;

            char *file;

            if ( ! sscanf( text, "file://%a[^\r\n]\n", &file ) )
            {
                printf( "invalid drop \"%s\"\n", text );
                return 0;
            }

            deurlify( file );

            printf( "pasted file \"%s\"\n", file );

            fl_cursor( FL_CURSOR_WAIT );
            Fl::check();

            char *t = strdup( file );

            char *filebase = strdup( basename( t ) );

            free( t );

            char *s = 0;

            int i = 0;

            for ( ; ; i++ )
            {
                if ( i ) 
                {
                    free( s );
                    asprintf( &s, "sources/%s-%i", filebase, i );
                }
                else
                    asprintf( &s, "sources/%s", filebase );

                DMESSAGE( "Symlink %s -> %s", file, s );
                if ( symlink( file, s ) == 0 )
                    break;
                
                if ( errno != EEXIST )
                {
                    WARNING( "Failed to create symlink: %s", strerror( errno ) );
                    break;
                }
            }
            
            Audio_File *c = Audio_File::from_file( basename( s ) );

            free( s );
            free( filebase );

            fl_cursor( FL_CURSOR_DEFAULT );
            Fl::check();

            if ( ! c || c->dummy() )
            {
                fl_alert( "Could not import file \"%s\"", file );
                free( file );

                if ( c )
                {
                    delete c;
                    c = NULL;
                }

                return 0;
            }

            free( file );

//            Audio_Region *r =
            new Audio_Region( c, this, timeline->xoffset + timeline->x_to_ts( Fl::event_x() - x() ) );

            redraw();
            
            return 1;
        }
        default:
            return Sequence::handle( m );
    }
}