/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/*
 * GnoWavCut -- a GNOME/GTK+ based RIFF PCM Wave File splitter
 * Copyright (C) 2000 Yoichi Imai <yoichi@silver-forest.com>
 *
 * 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 "config.h"
#include "wave.h"
#include "main.h"
#include "utils.h"
#include "prefs.h"

#include <sys/soundcard.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/ioctl.h>
#include <fcntl.h>
#include <math.h>

#define BUFFER 128
/* #define MOVE_SEC 4
#define MINI_PLAY_SEC 3
#define MINI_PREVIEW_PLAY TRUE */

#define MINI_LONG_MOVE_SEC 0.2
#define MINI_MOVE_SEC 0.04

static void wave_play_loop(gpointer data, gint fd, GdkInputCondition condition);
static void wave_update_time_digit(GnoWavCut *gnowavcut);
static void wave_play_loop_mini(gpointer data, gint fd, GdkInputCondition condition);
static void wave_play_mini(GnoWavCut *gnowavcut);
static void wave_ff_mini(GnoWavCut *gnowavcut, float move_sec);
static void wave_rew_mini(GnoWavCut *gnowavcut, float move_sec);
static void wave_update_mini_time_digit(GnoWavCut *gnowavcut);
static void wave_seek_if_mini_playing(GnoWavCut *gnowavcut);
static void wave_seek_if_mini_playing(GnoWavCut *gnowavcut)
{
	if(gnowavcut->now_mini_playing == TRUE) {
		gtk_input_remove(gnowavcut->input_tag);
		lseek(gnowavcut->wave_fd, gnowavcut->mini_old_point, SEEK_SET);
		wave_update_time_digit(gnowavcut);
		gnowavcut->now_mini_playing = FALSE;
	}
}

static void wave_update_mini_time_digit(GnoWavCut *gnowavcut)
{
	WaveInfo *wave_info;
	int now_point;
	gchar *time;
	
	wave_info = gnowavcut->wave_info;
	
	g_return_if_fail(gnowavcut->now_playing == TRUE);
	now_point = lseek(gnowavcut->wave_fd, 0, SEEK_CUR);
	
	gnowavcut->mini_old_point = now_point;
	time = utils_get_mini_time_from_cur(wave_info, now_point);
	gtk_label_set_text(GTK_LABEL(gnowavcut->label_mini), time);
	
	g_free(time);
}
static void wave_update_time_digit(GnoWavCut *gnowavcut)
{
	WaveInfo *wave_info;
	gchar *time;
	int now_point;
	gfloat percent;
	
	if (gnowavcut->hscale_can_move == FALSE)
		return;
	
	g_return_if_fail(gnowavcut->now_playing == TRUE);
	
	wave_info = gnowavcut->wave_info;
	now_point = lseek(gnowavcut->wave_fd, 0, SEEK_CUR);
	time = utils_get_time_from_seconds((now_point - WAVE_HEADER_SIZE) / wave_info->size_per_sec);
	gtk_label_set_text(GTK_LABEL(gnowavcut->label_middle), time);
	
	percent = (gfloat) (now_point - WAVE_HEADER_SIZE) / wave_info->data_size * 100;
	gtk_adjustment_set_value(GTK_ADJUSTMENT(gnowavcut->hadj), percent);
	
	g_free(time);
}

static void wave_play_loop(gpointer data, gint fd, GdkInputCondition condition)
{
	GnoWavCut *gnowavcut;
	WaveInfo *wave_info;
	int len;
	static short int tmp[BUFFER];
	
	gnowavcut = (GnoWavCut *)data;
	wave_info = gnowavcut->wave_info;
	
	if((len = read(gnowavcut->wave_fd, tmp, BUFFER * sizeof(short int))) > 0) {
		write(fd, tmp, len);
		wave_update_time_digit(gnowavcut);
		if(settings->wave_use_volume_bar) { /* Experimental! */
			gtk_adjustment_set_value(GTK_ADJUSTMENT(gnowavcut->volume_adj), fabs((double) tmp[0]));
		}
	} else {
		utils_gnowavcut_if_playing(gnowavcut, FALSE);
	}
}

static void wave_play_loop_mini(gpointer data, gint fd, GdkInputCondition condition)
{
	GnoWavCut *gnowavcut;
	WaveInfo *wave_info;
	int len;
	static short int tmp[BUFFER];
	
	gnowavcut = (GnoWavCut *)data;
	wave_info = gnowavcut->wave_info;
	
	gnowavcut->now_mini_playing = TRUE;
	
	if(gnowavcut->mini_play_size <= 0) {
		gtk_input_remove(gnowavcut->input_tag);
		lseek(gnowavcut->wave_fd, gnowavcut->mini_old_point, SEEK_SET);
		wave_update_time_digit(gnowavcut);
		gtk_widget_set_sensitive(gnowavcut->hscale, TRUE);
		gtk_widget_set_sensitive(gnowavcut->buttons->button_stop, TRUE);
		gtk_widget_set_sensitive(gnowavcut->buttons->button_ff, TRUE);
		gtk_widget_set_sensitive(gnowavcut->buttons->button_rew, TRUE);
		gtk_widget_set_sensitive(gnowavcut->buttons->button_play, TRUE);
		gnowavcut->now_mini_playing = FALSE;
		return;
	}
	
	if((len = read(gnowavcut->wave_fd, tmp, BUFFER * sizeof(short int))) > 0) {
		write(fd, tmp, len);
		gnowavcut->mini_play_size -= len;
		wave_update_time_digit(gnowavcut);
		if(settings->wave_use_volume_bar) { /* Experimental! */
			gtk_adjustment_set_value(GTK_ADJUSTMENT(gnowavcut->volume_adj), fabs((double) tmp[0]));
		}
	} else {
		utils_gnowavcut_if_playing(gnowavcut, FALSE);
	}
}

static void wave_play_mini(GnoWavCut *gnowavcut)
{
	WaveInfo *wave_info;
	
	wave_info = gnowavcut->wave_info;
	
	g_return_if_fail(gnowavcut->now_playing == TRUE);
	g_return_if_fail(gnowavcut->now_pause == TRUE);
	
	wave_seek_if_mini_playing(gnowavcut);
	
	gnowavcut->mini_old_point = lseek(gnowavcut->wave_fd, 0, SEEK_CUR);
	gnowavcut->mini_play_size = settings->wave_mini_play_sec * wave_info->size_per_sec;
	gnowavcut->input_tag = gdk_input_add(gnowavcut->dsp_fd, GDK_INPUT_WRITE,
					     wave_play_loop_mini, gnowavcut);
	gtk_widget_set_sensitive(gnowavcut->buttons->button_play, FALSE);
	gtk_widget_set_sensitive(gnowavcut->buttons->button_pause, FALSE);
	gtk_widget_set_sensitive(gnowavcut->buttons->button_stop, FALSE);
	gtk_widget_set_sensitive(gnowavcut->buttons->button_ff, FALSE);
	gtk_widget_set_sensitive(gnowavcut->buttons->button_rew, FALSE);
	gtk_widget_set_sensitive(gnowavcut->hscale, FALSE);
}

static void wave_ff_mini(GnoWavCut *gnowavcut, float move_sec)
{
	WaveInfo *wave_info;
	int seek_size;
	
	wave_info = gnowavcut->wave_info;
	
	g_return_if_fail(gnowavcut->now_playing == TRUE);
	
	wave_seek_if_mini_playing(gnowavcut);
	
	seek_size = wave_info->size_per_sec * move_sec;
	seek_size -= seek_size % wave_info->size_per_sample;
	
	gnowavcut->mini_old_point = lseek(gnowavcut->wave_fd, seek_size, SEEK_CUR);
	wave_update_mini_time_digit(gnowavcut);
	
	if(settings->wave_mini_preview_play)
		wave_play_mini(gnowavcut);
}

static void wave_rew_mini(GnoWavCut *gnowavcut, float move_sec)
{
	WaveInfo *wave_info;
	int seek_size;
	int now_point;
	
	wave_info = gnowavcut->wave_info;
	
	g_return_if_fail(gnowavcut->now_playing == TRUE);
	
	wave_seek_if_mini_playing(gnowavcut);
	
	now_point = lseek(gnowavcut->wave_fd, 0, SEEK_CUR);
	
	seek_size = wave_info->size_per_sec * move_sec;
	seek_size -= seek_size % wave_info->size_per_sample;
	
	if (now_point < WAVE_HEADER_SIZE + seek_size)
		gnowavcut->mini_old_point = lseek(gnowavcut->wave_fd, WAVE_HEADER_SIZE, SEEK_SET);
	else
		gnowavcut->mini_old_point = lseek(gnowavcut->wave_fd, -(seek_size), SEEK_CUR);
	
	wave_update_mini_time_digit(gnowavcut);
	
	if(settings->wave_mini_preview_play)
		wave_play_mini(gnowavcut);
}
void wave_play_cb(GtkWidget *widget, gpointer data)
{
	GnoWavCut *gnowavcut;
	WaveInfo *wave_info;
	int format;
	
	gnowavcut = (GnoWavCut *)data;
	wave_info = gnowavcut->wave_info;
	
	if(gnowavcut->file_name == NULL) return;
	if(gnowavcut->now_playing == TRUE) {
		if(gnowavcut->now_pause == TRUE) {
			gnowavcut->input_tag = gdk_input_add(gnowavcut->dsp_fd, GDK_INPUT_WRITE,
							     wave_play_loop, gnowavcut);
			gtk_widget_set_sensitive(gnowavcut->buttons->button_play, FALSE);
			gtk_widget_set_sensitive(gnowavcut->buttons->button_pause, TRUE);
			utils_mini_control_set_sensitive(gnowavcut, FALSE);
			gnowavcut->now_pause = FALSE;
			gtk_label_set_text(GTK_LABEL(gnowavcut->label_mini), "");
		}
		return;
	}
	
	if((gnowavcut->wave_fd = open(gnowavcut->file_name, O_RDONLY)) == -1) {
		utils_msgbox_error(_("File open error")); return;
	}
	if((gnowavcut->dsp_fd = open(settings->wave_dsp_dev, O_WRONLY)) == -1) {
		utils_msgbox_error(_("DSP open error")); return;
	}
	
	format = AFMT_S16_LE;
	ioctl(gnowavcut->dsp_fd, SOUND_PCM_WRITE_BITS, &format);
	format = wave_info->channels;
	ioctl(gnowavcut->dsp_fd, SOUND_PCM_WRITE_CHANNELS, &format);
	format = wave_info->samples_per_sec;
	ioctl(gnowavcut->dsp_fd, SOUND_PCM_WRITE_RATE, &format);
	lseek(gnowavcut->wave_fd, WAVE_HEADER_SIZE, SEEK_SET);
	
	
	gnowavcut->input_tag = gdk_input_add(gnowavcut->dsp_fd, GDK_INPUT_WRITE,
					     wave_play_loop, gnowavcut);
	utils_gnowavcut_if_playing(gnowavcut, TRUE);
}

void wave_pause_cb(GtkWidget *widget, gpointer data)
{
	GnoWavCut *gnowavcut;

	gnowavcut = (GnoWavCut *)data;
	gdk_input_remove(gnowavcut->input_tag);
	gnowavcut->input_tag = -1;
	
	utils_mini_control_set_sensitive(gnowavcut, TRUE);
	gtk_widget_set_sensitive(gnowavcut->buttons->button_pause, FALSE);
	gtk_widget_set_sensitive(gnowavcut->buttons->button_play, TRUE);
	gnowavcut->now_pause = TRUE;
	gnowavcut->mini_old_point = lseek(gnowavcut->wave_fd, 0, SEEK_CUR);

	wave_update_mini_time_digit(gnowavcut);
}

void wave_stop_cb(GtkWidget *widget, gpointer data)
{
	GnoWavCut *gnowavcut;
	
	gnowavcut = (GnoWavCut *)data;
	g_return_if_fail(gnowavcut->now_playing == TRUE);
	
	utils_gnowavcut_if_playing(gnowavcut, FALSE);
	
}

void wave_ff_cb(GtkWidget *widget, gpointer data)
{
	GnoWavCut *gnowavcut;
	WaveInfo *wave_info;
	
	gnowavcut = (GnoWavCut *)data;
	wave_info = gnowavcut->wave_info;
	
	g_return_if_fail(gnowavcut->now_playing == TRUE);
	
	lseek(gnowavcut->wave_fd, wave_info->size_per_sec * settings->wave_move_sec, SEEK_CUR);
	
	wave_update_time_digit(gnowavcut);
	if(gnowavcut->now_pause == TRUE)
		wave_update_mini_time_digit(gnowavcut);
}

void wave_rew_cb(GtkWidget *widget, gpointer data)
{
	GnoWavCut *gnowavcut;
	WaveInfo *wave_info;
	int now_point;
	
	gnowavcut = (GnoWavCut *)data;
	wave_info = gnowavcut->wave_info;
	
	g_return_if_fail(gnowavcut->now_playing == TRUE);
	
	now_point = lseek(gnowavcut->wave_fd, 0, SEEK_CUR);
	
	if (now_point < WAVE_HEADER_SIZE + settings->wave_move_sec * wave_info->size_per_sec)
		lseek(gnowavcut->wave_fd, WAVE_HEADER_SIZE, SEEK_SET);
	else
		lseek(gnowavcut->wave_fd, -(wave_info->size_per_sec * settings->wave_move_sec), SEEK_CUR);
	
	wave_update_time_digit(gnowavcut);
	if(gnowavcut->now_pause == TRUE)
		wave_update_mini_time_digit(gnowavcut);
}

void wave_jump_using_hscale(GnoWavCut *gnowavcut)
{
	gfloat value;
	int jump_point;
	
	WaveInfo *wave_info;
	
	g_return_if_fail(gnowavcut->now_playing == TRUE);
	
	wave_info = gnowavcut->wave_info;
	value = GTK_ADJUSTMENT(gnowavcut->hadj)->value;
	
	jump_point = (gint) wave_info->data_size * (value / 100) /* + WAVE_HADER_SIZE */ ;
	
	jump_point -= jump_point % wave_info->size_per_sample;
	
	jump_point += WAVE_HEADER_SIZE;
	
	wave_jump(gnowavcut, jump_point);
}

void wave_jump(GnoWavCut *gnowavcut, int point)
{
	g_return_if_fail(gnowavcut->wave_fd != -1);

	lseek(gnowavcut->wave_fd, point, SEEK_SET);
	wave_update_time_digit(gnowavcut);
	if(gnowavcut->now_pause == TRUE)
		wave_update_mini_time_digit(gnowavcut);
}
	
void wave_play_mini_cb(GtkWidget *widget, gpointer data)
{
	GnoWavCut *gnowavcut;
	
	gnowavcut = (GnoWavCut *)data;
	
	wave_play_mini(gnowavcut);
}

void wave_rew_mini_long_cb(GtkWidget *widget, gpointer data)
{
	wave_rew_mini((GnoWavCut *)data, MINI_LONG_MOVE_SEC);
}
void wave_rew_mini_cb(GtkWidget *widget, gpointer data)
{
	wave_rew_mini((GnoWavCut *)data, MINI_MOVE_SEC);
}
void wave_ff_mini_long_cb(GtkWidget *widget, gpointer data)
{
	wave_ff_mini((GnoWavCut *)data, MINI_LONG_MOVE_SEC);
}
void wave_ff_mini_cb(GtkWidget *widget, gpointer data)
{
	wave_ff_mini((GnoWavCut *)data, MINI_MOVE_SEC);
}