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svis.c

/*  BMP - Cross-platform multimedia player
 *  Copyright (C) 2003-2004  BMP development team.
 *
 *  Based on XMMS:
 *  Copyright (C) 1998-2003  XMMS development team.
 *
 *  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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 */

#include "svis.h"

#include <glib.h>
#include <gdk/gdk.h>
#include <string.h>

#include "main.h"
#include "mainwin.h"
#include "plugin.h"
#include "widget.h"
#include "vis.h"

static gint svis_redraw_delays[] = { 1, 2, 4, 8 };

/* FIXME: Are the svis_scope_colors correct? */
static guint8 svis_scope_colors[] = { 20, 19, 18, 19, 20 };
static guint8 svis_vu_normal_colors[] = { 17, 17, 17, 12, 12, 12, 2, 2 };

#define DRAW_DS_PIXEL(ptr,value) \
      *(ptr) = (value); \
      *((ptr) + 1) = (value); \
      *((ptr) + 76) = (value); \
      *((ptr) + 77) = (value);

#define SVIS_HEIGHT 5
#define SVIS_WIDTH 38

void
svis_timeout_func(SVis * svis, guchar * data)
{
    static GTimer *timer = NULL;
    gulong micros = 9999999;
    gboolean falloff = FALSE;
    gint i;

    if (!timer) {
        timer = g_timer_new();
        g_timer_start(timer);
    }
    else {
        g_timer_elapsed(timer, &micros);
        if (micros > 14000)
            g_timer_reset(timer);

    }

    if (cfg.vis_type == INPUT_VIS_ANALYZER) {
        if (micros > 14000)
            falloff = TRUE;

        for (i = 0; i < 2; i++) {
            if (falloff || data) {
                if (data && data[i] > svis->vs_data[i])
                    svis->vs_data[i] = data[i];
                else if (falloff) {
                    if (svis->vs_data[i] >= 2)
                        svis->vs_data[i] -= 2;
                    else
                        svis->vs_data[i] = 0;
                }
            }

        }
    }
    else if (data) {
        for (i = 0; i < 75; i++)
            svis->vs_data[i] = data[i];
    }

    if (micros > 14000) {
        if (!svis->vs_refresh_delay) {
            svis_draw((Widget *) svis);
            svis->vs_refresh_delay = svis_redraw_delays[cfg.vis_refresh];

        }
        svis->vs_refresh_delay--;
    }
}

void
svis_draw(Widget * w)
{
    SVis *svis = (SVis *) w;
    gint x, y, h;
    guchar svis_color[24][3];
    guchar rgb_data[SVIS_WIDTH * 2 * SVIS_HEIGHT * 2], *ptr, c;
    guint32 colors[24];
    GdkRgbCmap *cmap;

    GDK_THREADS_ENTER();

    skin_get_viscolor(bmp_active_skin, svis_color);
    for (y = 0; y < 24; y++) {
        colors[y] =
            svis_color[y][0] << 16 | svis_color[y][1] << 8 | svis_color[y][2];
    }
    cmap = gdk_rgb_cmap_new(colors, 24);

    memset(rgb_data, 0, SVIS_WIDTH * SVIS_HEIGHT);
    if (cfg.vis_type == VIS_ANALYZER) {
        switch (cfg.vu_mode) {
        case VU_NORMAL:
            for (y = 0; y < 2; y++) {
                ptr = rgb_data + ((y * 3) * 38);
                h = (svis->vs_data[y] * 7) / 37;
                for (x = 0; x < h; x++, ptr += 5) {
                    c = svis_vu_normal_colors[x];
                    *(ptr) = c;
                    *(ptr + 1) = c;
                    *(ptr + 2) = c;
                    *(ptr + 38) = c;
                    *(ptr + 39) = c;
                    *(ptr + 40) = c;
                }
            }
            break;
        case VU_SMOOTH:
            for (y = 0; y < 2; y++) {
                ptr = rgb_data + ((y * 3) * SVIS_WIDTH);
                for (x = 0; x < svis->vs_data[y]; x++, ptr++) {
                    c = 17 - ((x * 15) / 37);
                    *(ptr) = c;
                    *(ptr + 38) = c;
                }
            }
            break;
        }
    }
    else if (cfg.vis_type == VIS_SCOPE) {
        for (x = 0; x < 38; x++) {
            h = svis->vs_data[x << 1] / 3;
            ptr = rgb_data + ((4 - h) * 38) + x;
            *ptr = svis_scope_colors[h];
        }
    }

    gdk_draw_indexed_image(mainwin->window, mainwin_gc,
                           svis->vs_widget.x, svis->vs_widget.y,
                           svis->vs_widget.width,
                           svis->vs_widget.height,
                           GDK_RGB_DITHER_NORMAL, (guchar *) rgb_data,
                           38, cmap);

    gdk_rgb_cmap_free(cmap);
    GDK_THREADS_LEAVE();
}

void
svis_clear_data(SVis * svis)
{
    gint i;

    for (i = 0; i < 75; i++) {
        svis->vs_data[i] = (cfg.vis_type == VIS_SCOPE) ? 6 : 0;
    }
}

void
svis_clear(SVis * svis)
{
    gdk_window_clear_area(mainwin->window, svis->vs_widget.x,
                          svis->vs_widget.y, svis->vs_widget.width,
                          svis->vs_widget.height);
}

SVis *
create_svis(GList ** wlist, GdkPixmap * parent, GdkGC * gc, gint x, gint y)
{
    SVis *svis;

    svis = g_new0(SVis, 1);
    widget_init(&svis->vs_widget, parent, gc, x, y, SVIS_WIDTH, SVIS_HEIGHT,
                1);

    add_widget(wlist, svis);
    return svis;
}

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