aboutsummaryrefslogtreecommitdiffstats
path: root/plugins/eg-sampler.lv2/sampler_ui.c
blob: c08930a4febfd955dc341f6aae8defbc387c59af (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
/*
  LV2 Sampler Example Plugin UI
  Copyright 2011-2012 David Robillard <d@drobilla.net>

  Permission to use, copy, modify, and/or distribute this software for any
  purpose with or without fee is hereby granted, provided that the above
  copyright notice and this permission notice appear in all copies.

  THIS SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/

#include <stdlib.h>

#include <gtk/gtk.h>

#include "lv2/lv2plug.in/ns/ext/atom/atom.h"
#include "lv2/lv2plug.in/ns/ext/atom/forge.h"
#include "lv2/lv2plug.in/ns/ext/atom/util.h"
#include "lv2/lv2plug.in/ns/ext/patch/patch.h"
#include "lv2/lv2plug.in/ns/ext/urid/urid.h"
#include "lv2/lv2plug.in/ns/extensions/ui/ui.h"

#include "./uris.h"

#define SAMPLER_UI_URI "http://lv2plug.in/plugins/eg-sampler#ui"

typedef struct {
	LV2_Atom_Forge forge;

	LV2_URID_Map* map;
	SamplerURIs   uris;

	LV2UI_Write_Function write;
	LV2UI_Controller     controller;

	GtkWidget* box;
	GtkWidget* button;
	GtkWidget* label;
	GtkWidget* window;  /* For optional show interface. */
} SamplerUI;

static void
on_load_clicked(GtkWidget* widget,
                void*      handle)
{
	SamplerUI* ui = (SamplerUI*)handle;

	/* Create a dialog to select a sample file. */
	GtkWidget* dialog = gtk_file_chooser_dialog_new(
		"Load Sample",
		NULL,
		GTK_FILE_CHOOSER_ACTION_OPEN,
		GTK_STOCK_CANCEL, GTK_RESPONSE_CANCEL,
		GTK_STOCK_OPEN, GTK_RESPONSE_ACCEPT,
		NULL);

	/* Run the dialog, and return if it is cancelled. */
	if (gtk_dialog_run(GTK_DIALOG(dialog)) != GTK_RESPONSE_ACCEPT) {
		gtk_widget_destroy(dialog);
		return;
	}

	/* Get the file path from the dialog. */
	char* filename = gtk_file_chooser_get_filename(GTK_FILE_CHOOSER(dialog));

	/* Got what we need, destroy the dialog. */
	gtk_widget_destroy(dialog);

#define OBJ_BUF_SIZE 1024
	uint8_t obj_buf[OBJ_BUF_SIZE];
	lv2_atom_forge_set_buffer(&ui->forge, obj_buf, OBJ_BUF_SIZE);

	LV2_Atom* msg = write_set_file(&ui->forge, &ui->uris,
	                               filename, strlen(filename));

	ui->write(ui->controller, 0, lv2_atom_total_size(msg),
	          ui->uris.atom_eventTransfer,
	          msg);

	g_free(filename);
}

static LV2UI_Handle
instantiate(const LV2UI_Descriptor*   descriptor,
            const char*               plugin_uri,
            const char*               bundle_path,
            LV2UI_Write_Function      write_function,
            LV2UI_Controller          controller,
            LV2UI_Widget*             widget,
            const LV2_Feature* const* features)
{
	SamplerUI* ui = (SamplerUI*)malloc(sizeof(SamplerUI));
	ui->map        = NULL;
	ui->write      = write_function;
	ui->controller = controller;
	ui->box        = NULL;
	ui->button     = NULL;
	ui->label      = NULL;
	ui->window     = NULL;

	*widget = NULL;

	for (int i = 0; features[i]; ++i) {
		if (!strcmp(features[i]->URI, LV2_URID_URI "#map")) {
			ui->map = (LV2_URID_Map*)features[i]->data;
		}
	}

	if (!ui->map) {
		fprintf(stderr, "sampler_ui: Host does not support urid:Map\n");
		free(ui);
		return NULL;
	}

	map_sampler_uris(ui->map, &ui->uris);

	lv2_atom_forge_init(&ui->forge, ui->map);

	ui->box = gtk_vbox_new(FALSE, 4);
	ui->label = gtk_label_new("?");
	ui->button = gtk_button_new_with_label("Load Sample");
	gtk_box_pack_start(GTK_BOX(ui->box), ui->label, TRUE, TRUE, 4);
	gtk_box_pack_start(GTK_BOX(ui->box), ui->button, FALSE, FALSE, 4);
	g_signal_connect(ui->button, "clicked",
	                 G_CALLBACK(on_load_clicked),
	                 ui);

	// Request state (filename) from plugin
	uint8_t get_buf[512];
	lv2_atom_forge_set_buffer(&ui->forge, get_buf, sizeof(get_buf));

	LV2_Atom_Forge_Frame frame;
	LV2_Atom*            msg = (LV2_Atom*)lv2_atom_forge_object(
		&ui->forge, &frame, 0, ui->uris.patch_Get);
	lv2_atom_forge_pop(&ui->forge, &frame);

	ui->write(ui->controller, 0, lv2_atom_total_size(msg),
	          ui->uris.atom_eventTransfer,
	          msg);

	*widget = ui->box;

	return ui;
}

static void
cleanup(LV2UI_Handle handle)
{
	SamplerUI* ui = (SamplerUI*)handle;
	gtk_widget_destroy(ui->button);
	free(ui);
}

static void
port_event(LV2UI_Handle handle,
           uint32_t     port_index,
           uint32_t     buffer_size,
           uint32_t     format,
           const void*  buffer)
{
	SamplerUI* ui = (SamplerUI*)handle;
	if (format == ui->uris.atom_eventTransfer) {
		const LV2_Atom* atom = (const LV2_Atom*)buffer;
		if (lv2_atom_forge_is_object_type(&ui->forge, atom->type)) {
			const LV2_Atom_Object* obj      = (const LV2_Atom_Object*)atom;
			const LV2_Atom*        file_uri = read_set_file(&ui->uris, obj);
			if (!file_uri) {
				fprintf(stderr, "Unknown message sent to UI.\n");
				return;
			}

			const char* uri = (const char*)LV2_ATOM_BODY_CONST(file_uri);
			gtk_label_set_text(GTK_LABEL(ui->label), uri);
		} else {
			fprintf(stderr, "Unknown message type.\n");
		}
	} else {
		fprintf(stderr, "Unknown format.\n");
	}
}

/* Optional non-embedded UI show interface. */
static int
ui_show(LV2UI_Handle handle)
{
	SamplerUI* ui = (SamplerUI*)handle;

	int argc = 0;
	gtk_init(&argc, NULL);

	ui->window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
	gtk_container_add(GTK_CONTAINER(ui->window), ui->box);
	gtk_widget_show_all(ui->window);
	gtk_window_present(GTK_WINDOW(ui->window));

	return 0;
}

/* Optional non-embedded UI hide interface. */
static int
ui_hide(LV2UI_Handle handle)
{
	return 0;
}

/* Idle interface for optional non-embedded UI. */
static int
ui_idle(LV2UI_Handle handle)
{
	SamplerUI* ui = (SamplerUI*)handle;
	if (ui->window) {
		gtk_main_iteration();
	}
	return 0;
}

static const void*
extension_data(const char* uri)
{
	static const LV2UI_Show_Interface show = { ui_show, ui_hide };
	static const LV2UI_Idle_Interface idle = { ui_idle };
	if (!strcmp(uri, LV2_UI__showInterface)) {
		return &show;
	} else if (!strcmp(uri, LV2_UI__idleInterface)) {
		return &idle;
	}
	return NULL;
}

static const LV2UI_Descriptor descriptor = {
	SAMPLER_UI_URI,
	instantiate,
	cleanup,
	port_event,
	extension_data
};

LV2_SYMBOL_EXPORT
const LV2UI_Descriptor*
lv2ui_descriptor(uint32_t index)
{
	switch (index) {
	case 0:
		return &descriptor;
	default:
		return NULL;
	}
}