/***************************************************************************
 *             __________               __   ___.
 *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
 *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
 *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
 *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
 *                     \/            \/     \/    \/            \/
 * $Id$
 *
 * Copyright (C) 2005 Peter D'Hoye
 *
 * All files in this archive are subject to the GNU General Public License.
 * See the file COPYING in the source tree root for full license agreement.
 *
 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
 * KIND, either express or implied.
 *
 ****************************************************************************/
#include "plugin.h"
#include "helper.h"
#include "grey.h"

#ifdef HAVE_LCD_BITMAP

#if (CONFIG_KEYPAD == IPOD_4G_PAD) || (CONFIG_KEYPAD == IPOD_3G_PAD) || \
    (CONFIG_KEYPAD == IPOD_1G2G_PAD)
#define FPS_QUIT BUTTON_MENU
#elif defined(BUTTON_OFF)
#define FPS_QUIT BUTTON_OFF
#else
#define FPS_QUIT BUTTON_POWER
#endif

#define DURATION (2*HZ) /* longer duration gives more precise results */

PLUGIN_HEADER

static struct plugin_api* rb;

/* Screen logging */
static int line;
static int max_line;
#ifdef HAVE_REMOTE_LCD
static int remote_line;
static int remote_max_line;
#endif
#if LCD_DEPTH < 4
static unsigned char *gbuf;
static size_t gbuf_size;
#endif

static void log_init(void)
{
    int h;

    rb->lcd_setmargins(0, 0);
    rb->lcd_getstringsize("A", NULL, &h);
    max_line = LCD_HEIGHT / h;
    line = 0;
    rb->lcd_clear_display();
    rb->lcd_update();
#ifdef HAVE_REMOTE_LCD
    rb->lcd_remote_setmargins(0, 0);
    rb->lcd_remote_getstringsize("A", NULL, &h);
    remote_max_line = LCD_REMOTE_HEIGHT / h;
    remote_line = 0;
    rb->lcd_remote_clear_display();
    rb->lcd_remote_update();
#endif
}

static void log_text(char *text)
{
    rb->lcd_puts(0, line, text);
    if (++line >= max_line)
        line = 0;
    rb->lcd_update();
#ifdef HAVE_REMOTE_LCD
    rb->lcd_remote_puts(0, remote_line, text);
    if (++remote_line >= remote_max_line)
        remote_line = 0;
    rb->lcd_remote_update();
#endif
}

static int calc_tenth_fps(int framecount, long ticks)
{
    return (10*HZ) * framecount / ticks;
}

static void time_main_update(void)
{
    char str[32];     /* text buffer */
    long time_start;  /* start tickcount */
    long time_end;    /* end tickcount */
    int frame_count;
    int fps;

    const int part14_x = LCD_WIDTH/4;   /* x-offset for 1/4 update test */
    const int part14_w = LCD_WIDTH/2;   /* x-size for 1/4 update test */
    const int part14_y = LCD_HEIGHT/4;  /* y-offset for 1/4 update test */
    const int part14_h = LCD_HEIGHT/2;  /* y-size for 1/4 update test */

    /* Test 1: full LCD update */
    frame_count = 0;
    rb->sleep(0); /* sync to tick */
    time_start = *rb->current_tick;
    while((time_end = *rb->current_tick) - time_start < DURATION)
    {
        rb->lcd_update();
        frame_count++;
    }
    fps = calc_tenth_fps(frame_count, time_end - time_start);
    rb->snprintf(str, sizeof(str), "1/1: %d.%d fps", fps / 10, fps % 10);
    log_text(str);

    /* Test 2: quarter LCD update */
    frame_count = 0;
    rb->sleep(0); /* sync to tick */
    time_start = *rb->current_tick;
    while((time_end = *rb->current_tick) - time_start < DURATION)
    {
        rb->lcd_update_rect(part14_x, part14_y, part14_w, part14_h);
        frame_count++;
    }
    fps = calc_tenth_fps(frame_count, time_end - time_start);
    rb->snprintf(str, sizeof(str), "1/4: %d.%d fps", fps / 10, fps % 10);
    log_text(str);
}

#ifdef HAVE_LCD_COLOR

#if LCD_WIDTH >= LCD_HEIGHT
#define YUV_WIDTH LCD_WIDTH
#define YUV_HEIGHT LCD_HEIGHT
#else /* Assume the screen is rotated on portrait LCDs */
#define YUV_WIDTH LCD_HEIGHT
#define YUV_HEIGHT LCD_WIDTH
#endif

static unsigned char ydata[YUV_HEIGHT][YUV_WIDTH];
static unsigned char udata[YUV_HEIGHT/2][YUV_WIDTH/2];
static unsigned char vdata[YUV_HEIGHT/2][YUV_WIDTH/2];

static unsigned char * const yuvbuf[3] = {
    (void*)ydata,
    (void*)udata,
    (void*)vdata
};

static void make_gradient_rect(int width, int height)
{
    unsigned char vline[YUV_WIDTH/2];
    int x, y;

    width /= 2;
    height /= 2;

    for (x = 0; x < width; x++)
        vline[x] = (x << 8) / width;
    for (y = 0; y < height; y++)
    {
        rb->memset(udata[y], (y << 8) / height, width);
        rb->memcpy(vdata[y], vline, width);
    }
}

static void time_main_yuv(void)
{
    char str[32];     /* text buffer */
    long time_start;  /* start tickcount */
    long time_end;    /* end tickcount */
    int frame_count;
    int fps;

    const int part14_x = YUV_WIDTH/4;   /* x-offset for 1/4 update test */
    const int part14_w = YUV_WIDTH/2;   /* x-size for 1/4 update test */
    const int part14_y = YUV_HEIGHT/4;  /* y-offset for 1/4 update test */
    const int part14_h = YUV_HEIGHT/2;  /* y-size for 1/4 update test */
    
    rb->memset(ydata, 128, sizeof(ydata)); /* medium grey */

    /* Test 1: full LCD update */
    make_gradient_rect(YUV_WIDTH, YUV_HEIGHT);

    frame_count = 0;
    rb->sleep(0); /* sync to tick */
    time_start = *rb->current_tick;
    while((time_end = *rb->current_tick) - time_start < DURATION)
    {
        rb->lcd_yuv_blit(yuvbuf, 0, 0, YUV_WIDTH,
                         0, 0, YUV_WIDTH, YUV_HEIGHT);
        frame_count++;
    }
    fps = calc_tenth_fps(frame_count, time_end - time_start);
    rb->snprintf(str, sizeof(str), "1/1: %d.%d fps", fps / 10, fps % 10);
    log_text(str);

    /* Test 2: quarter LCD update */
    make_gradient_rect(YUV_WIDTH/2, YUV_HEIGHT/2);

    frame_count = 0;
    rb->sleep(0); /* sync to tick */
    time_start = *rb->current_tick;
    while((time_end = *rb->current_tick) - time_start < DURATION)
    {
        rb->lcd_yuv_blit(yuvbuf, 0, 0, YUV_WIDTH,
                         part14_x, part14_y, part14_w, part14_h);
        frame_count++;
    }
    fps = calc_tenth_fps(frame_count, time_end - time_start);
    rb->snprintf(str, sizeof(str), "1/4: %d.%d fps", fps / 10, fps % 10);
    log_text(str);
}
#endif

#ifdef HAVE_REMOTE_LCD
static void time_remote_update(void)
{
    char str[32];     /* text buffer */
    long time_start;  /* start tickcount */
    long time_end;    /* end tickcount */
    int frame_count;
    int fps;

    const int part14_x = LCD_REMOTE_WIDTH/4;   /* x-offset for 1/4 update test */
    const int part14_w = LCD_REMOTE_WIDTH/2;   /* x-size for 1/4 update test */
    const int part14_y = LCD_REMOTE_HEIGHT/4;  /* y-offset for 1/4 update test */
    const int part14_h = LCD_REMOTE_HEIGHT/2;  /* y-size for 1/4 update test */

    /* Test 1: full LCD update */
    frame_count = 0;
    rb->sleep(0); /* sync to tick */
    time_start = *rb->current_tick;
    while((time_end = *rb->current_tick) - time_start < DURATION)
    {
        rb->lcd_remote_update();
        frame_count++;
    }
    fps = calc_tenth_fps(frame_count, time_end - time_start);
    rb->snprintf(str, sizeof(str), "1/1: %d.%d fps", fps / 10, fps % 10);
    log_text(str);

    /* Test 2: quarter LCD update */
    frame_count = 0;
    rb->sleep(0); /* sync to tick */
    time_start = *rb->current_tick;
    while((time_end = *rb->current_tick) - time_start < DURATION)
    {
        rb->lcd_remote_update_rect(part14_x, part14_y, part14_w, part14_h);
        frame_count++;
    }
    fps = calc_tenth_fps(frame_count, time_end - time_start);
    rb->snprintf(str, sizeof(str), "1/4: %d.%d fps", fps / 10, fps % 10);
    log_text(str);
}
#endif

#if LCD_DEPTH < 4

GREY_INFO_STRUCT
static unsigned char greydata[LCD_HEIGHT][LCD_WIDTH];

static void make_grey_rect(int width, int height)
{
    unsigned char vline[LCD_WIDTH];
    int x, y;

    for (x = 0; x < width; x++)
        vline[x] = (x << 8) / width;
    for (y = 0; y < height; y++)
        rb->memcpy(greydata[y], vline, width);
}

static void time_greyscale(void)
{
    char str[32];     /* text buffer */
    long time_start;  /* start tickcount */
    long time_end;    /* end tickcount */
    long time_1, time_2;
    int frames_1, frames_2;
    int fps, load;

    gbuf = (unsigned char *) rb->plugin_get_buffer(&gbuf_size);
    if (!grey_init(rb, gbuf, gbuf_size, false, LCD_WIDTH, LCD_HEIGHT, NULL))
    {
        log_text("greylib: out of memory.");
        return;
    }
    make_grey_rect(LCD_WIDTH, LCD_HEIGHT);

    /* Test 1 - greyscale overlay not yet enabled */
    frames_1 = 0;
    rb->sleep(0); /* sync to tick */
    time_start = *rb->current_tick;
    while((time_end = *rb->current_tick) - time_start < DURATION)
    {
        grey_ub_gray_bitmap(greydata[0], 0, 0, LCD_WIDTH, LCD_HEIGHT);
        frames_1++;
    }
    time_1 = time_end - time_start;
    
    /* Test 2 - greyscale overlay enabled */
    grey_show(true);
    frames_2 = 0;
    rb->sleep(0); /* sync to tick */
    time_start = *rb->current_tick;
    while((time_end = *rb->current_tick) - time_start < DURATION)
    {
        grey_ub_gray_bitmap(greydata[0], 0, 0, LCD_WIDTH, LCD_HEIGHT);
        frames_2++;
    }
    time_2 = time_end - time_start;

    grey_release();
    fps = calc_tenth_fps(frames_2, time_2);
    load = 100 - (100 * frames_2 * time_1) / (frames_1 * time_2);
    rb->snprintf(str, sizeof(str), "1/1: %d.%d fps", fps / 10, fps % 10);
    log_text(str);

    if (load > 0 && load < 100)
    {
        rb->snprintf(str, sizeof(str), "CPU load: %d%%", load);
        log_text(str);
    }
    else
        log_text("CPU load err (boost?)");
}
#endif

/* plugin entry point */
enum plugin_status plugin_start(struct plugin_api* api, void* parameter)
{
#ifndef SIMULATOR
    char str[32];
    int cpu_freq;
#endif

    /* standard stuff */
    (void)parameter;
    rb = api;
    
    log_init();
#ifndef SIMULATOR
    cpu_freq = *rb->cpu_frequency; /* remember CPU frequency */
#endif
    backlight_force_on(rb); /* backlight control in lib/helper.c */

    log_text("Main LCD Update");
    time_main_update();
#ifdef HAVE_LCD_COLOR
    log_text("Main LCD YUV");
    time_main_yuv();
#endif
#if LCD_DEPTH < 4
    log_text("Greyscale library");
    time_greyscale();
#endif
#ifdef HAVE_REMOTE_LCD
    log_text("Remote LCD Update");
    time_remote_update();
#endif

#ifndef SIMULATOR
    if (*rb->cpu_frequency != cpu_freq)
        rb->snprintf(str, sizeof(str), "CPU clock changed!");
    else
        rb->snprintf(str, sizeof(str), "CPU: %d MHz",
                     (cpu_freq + 500000) / 1000000);
    log_text(str);
#endif
    backlight_use_settings(rb); /* backlight control in lib/helper.c */

    /* wait until user closes plugin */
    while (rb->button_get(true) != FPS_QUIT);

    return PLUGIN_OK;
}
#endif