1 /*
2 * libInstPatch
3 * Copyright (C) 1999-2014 Element Green <element@elementsofsound.org>
4 *
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Lesser General Public License
7 * as published by the Free Software Foundation; version 2.1
8 * of the License only.
9 *
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU Lesser General Public License for more details.
14 *
15 * You should have received a copy of the GNU Lesser General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
18 * 02110-1301, USA or on the web at http://www.gnu.org.
19 */
20 /**
21 * SECTION: IpatchSampleStoreCache
22 * @short_description: Sample store object for cached samples in RAM
23 * @see_also: #IpatchSampleData
24 * @stability: Stable
25 *
26 * This sample store type is tightly integrated with #IpatchSampleData to provide
27 * managed cached samples in RAM.
28 */
29 #include <string.h>
30 #include <stdlib.h>
31 #include <glib.h>
32 #include <glib-object.h>
33 #include "IpatchSampleStoreCache.h"
34 #include "ipatch_priv.h"
35 #include "i18n.h"
36
37 /* properties */
38 enum
39 {
40 PROP_0,
41 PROP_LOCATION
42 };
43
44 /* Defined in IpatchSampleData.c */
45 extern void _ipatch_sample_data_cache_add_unused_size(int size);
46
47 static void ipatch_sample_store_cache_sample_iface_init(IpatchSampleIface *iface);
48 static void ipatch_sample_store_cache_set_property
49 (GObject *object, guint property_id, const GValue *value, GParamSpec *pspec);
50 static void ipatch_sample_store_cache_get_property
51 (GObject *object, guint property_id, GValue *value, GParamSpec *pspec);
52 static void ipatch_sample_store_cache_finalize(GObject *object);
53 static gboolean ipatch_sample_store_cache_sample_iface_open
54 (IpatchSampleHandle *handle, GError **err);
55 static void ipatch_sample_store_cache_sample_iface_close(IpatchSampleHandle *handle);
56 static gboolean ipatch_sample_store_cache_sample_iface_read
57 (IpatchSampleHandle *handle, guint offset, guint frames, gpointer buf, GError **err);
58 static gboolean ipatch_sample_store_cache_sample_iface_write
59 (IpatchSampleHandle *handle, guint offset, guint frames, gconstpointer buf, GError **err);
60
61
G_DEFINE_TYPE_WITH_CODE(IpatchSampleStoreCache,ipatch_sample_store_cache,IPATCH_TYPE_SAMPLE_STORE,G_IMPLEMENT_INTERFACE (IPATCH_TYPE_SAMPLE,ipatch_sample_store_cache_sample_iface_init))62 G_DEFINE_TYPE_WITH_CODE(IpatchSampleStoreCache, ipatch_sample_store_cache,
63 IPATCH_TYPE_SAMPLE_STORE,
64 G_IMPLEMENT_INTERFACE(IPATCH_TYPE_SAMPLE,
65 ipatch_sample_store_cache_sample_iface_init))
66
67 static void
68 ipatch_sample_store_cache_sample_iface_init(IpatchSampleIface *iface)
69 {
70 iface->open = ipatch_sample_store_cache_sample_iface_open;
71 iface->close = ipatch_sample_store_cache_sample_iface_close;
72 iface->read = ipatch_sample_store_cache_sample_iface_read;
73 iface->write = ipatch_sample_store_cache_sample_iface_write;
74 }
75
76 static void
ipatch_sample_store_cache_class_init(IpatchSampleStoreCacheClass * klass)77 ipatch_sample_store_cache_class_init(IpatchSampleStoreCacheClass *klass)
78 {
79 GObjectClass *obj_class = G_OBJECT_CLASS(klass);
80 IpatchItemClass *item_class = IPATCH_ITEM_CLASS(klass);
81
82 obj_class->finalize = ipatch_sample_store_cache_finalize;
83 obj_class->get_property = ipatch_sample_store_cache_get_property;
84 item_class->item_set_property = ipatch_sample_store_cache_set_property;
85
86 g_object_class_install_property(obj_class, PROP_LOCATION,
87 g_param_spec_pointer("location", "Location", "Sample data pointer",
88 G_PARAM_READWRITE));
89 }
90
91 static void
ipatch_sample_store_cache_set_property(GObject * object,guint property_id,const GValue * value,GParamSpec * pspec)92 ipatch_sample_store_cache_set_property(GObject *object, guint property_id,
93 const GValue *value, GParamSpec *pspec)
94 {
95 IpatchSampleStoreCache *store = IPATCH_SAMPLE_STORE_CACHE(object);
96
97 switch(property_id)
98 {
99 case PROP_LOCATION:
100 g_return_if_fail(store->location == NULL);
101
102 /* Lock not needed, should be set only once before use */
103 store->location = g_value_get_pointer(value);
104 break;
105
106 default:
107 G_OBJECT_WARN_INVALID_PROPERTY_ID(object, property_id, pspec);
108 }
109 }
110
111 static void
ipatch_sample_store_cache_get_property(GObject * object,guint property_id,GValue * value,GParamSpec * pspec)112 ipatch_sample_store_cache_get_property(GObject *object, guint property_id,
113 GValue *value, GParamSpec *pspec)
114 {
115 IpatchSampleStoreCache *store = IPATCH_SAMPLE_STORE_CACHE(object);
116
117 switch(property_id)
118 {
119 case PROP_LOCATION:
120 /* Lock not needed, should be set only once before use */
121 g_value_set_pointer(value, store->location);
122 break;
123
124 default:
125 G_OBJECT_WARN_INVALID_PROPERTY_ID(object, property_id, pspec);
126 }
127 }
128
129 static void
ipatch_sample_store_cache_init(IpatchSampleStoreCache * store)130 ipatch_sample_store_cache_init(IpatchSampleStoreCache *store)
131 {
132 GTimeVal timeval;
133
134 /* Initialize last open to current time */
135 g_get_current_time(&timeval);
136 store->last_open = timeval.tv_sec;
137 }
138
139 static void
ipatch_sample_store_cache_finalize(GObject * object)140 ipatch_sample_store_cache_finalize(GObject *object)
141 {
142 IpatchSampleStoreCache *store = IPATCH_SAMPLE_STORE_CACHE(object);
143
144 g_free(store->location);
145 store->location = NULL;
146
147 if(G_OBJECT_CLASS(ipatch_sample_store_cache_parent_class)->finalize)
148 {
149 G_OBJECT_CLASS(ipatch_sample_store_cache_parent_class)->finalize(object);
150 }
151 }
152
153 static gboolean
ipatch_sample_store_cache_sample_iface_open(IpatchSampleHandle * handle,GError ** err)154 ipatch_sample_store_cache_sample_iface_open(IpatchSampleHandle *handle,
155 GError **err)
156 {
157 IpatchSampleStoreCache *store = IPATCH_SAMPLE_STORE_CACHE(handle->sample);
158 guint bytes;
159
160 g_return_val_if_fail(!handle->read_mode || store->location, FALSE);
161
162 IPATCH_ITEM_WLOCK(store);
163 store->last_open = 0; /* Reset time to 0 to indicate store is open */
164
165 if(store->open_count == 0) /* Recursive lock: store, sample_cache_vars */
166 _ipatch_sample_data_cache_add_unused_size
167 (-(int)ipatch_sample_store_get_size_bytes((IpatchSampleStore *)store));
168
169 g_atomic_int_inc(&store->open_count);
170 IPATCH_ITEM_WUNLOCK(store);
171
172 /* Locking not needed, since new samples will be written with audio before
173 * being used by multiple threads */
174 if(!store->location)
175 {
176 bytes = ipatch_sample_store_get_size_bytes((IpatchSampleStore *)store);
177 store->location = g_malloc0(bytes);
178 }
179
180 /* Store frame size to data1 */
181 handle->data1 = GUINT_TO_POINTER(ipatch_sample_format_size(ipatch_sample_store_get_format(store)));
182
183 return (TRUE);
184 }
185
186 static void
ipatch_sample_store_cache_sample_iface_close(IpatchSampleHandle * handle)187 ipatch_sample_store_cache_sample_iface_close(IpatchSampleHandle *handle)
188 {
189 IpatchSampleStoreCache *store = IPATCH_SAMPLE_STORE_CACHE(handle->sample);
190 GTimeVal timeval;
191
192 IPATCH_ITEM_WLOCK(store);
193
194 /* Set last open time if there are no more open handles */
195 if(g_atomic_int_dec_and_test(&store->open_count))
196 {
197 g_get_current_time(&timeval);
198 store->last_open = timeval.tv_sec;
199
200 /* Recursive lock: store, sample_cache_vars */
201 _ipatch_sample_data_cache_add_unused_size
202 (ipatch_sample_store_get_size_bytes((IpatchSampleStore *)store));
203 }
204
205 IPATCH_ITEM_WUNLOCK(store);
206 }
207
208 static gboolean
ipatch_sample_store_cache_sample_iface_read(IpatchSampleHandle * handle,guint offset,guint frames,gpointer buf,GError ** err)209 ipatch_sample_store_cache_sample_iface_read(IpatchSampleHandle *handle,
210 guint offset, guint frames,
211 gpointer buf, GError **err)
212 {
213 IpatchSampleStoreCache *store = (IpatchSampleStoreCache *)(handle->sample);
214 guint8 frame_size = GPOINTER_TO_UINT(handle->data1);
215
216 /* No need to lock, sample data should not change after initial load */
217
218 memcpy(buf, &((gint8 *)(store->location))[offset * frame_size],
219 frames * frame_size);
220
221 return (TRUE);
222 }
223
224 static gboolean
ipatch_sample_store_cache_sample_iface_write(IpatchSampleHandle * handle,guint offset,guint frames,gconstpointer buf,GError ** err)225 ipatch_sample_store_cache_sample_iface_write(IpatchSampleHandle *handle,
226 guint offset, guint frames,
227 gconstpointer buf, GError **err)
228 {
229 IpatchSampleStoreCache *store = (IpatchSampleStoreCache *)(handle->sample);
230 guint8 frame_size = GPOINTER_TO_UINT(handle->data1);
231
232 /* No need to lock, sample data written only once and before used by
233 multiple threads */
234
235 memcpy(&((gint8 *)(store->location))[offset * frame_size], buf,
236 frames * frame_size);
237
238 return (TRUE);
239 }
240
241 /**
242 * ipatch_sample_store_cache_new:
243 * @location: Location of existing sample data or %NULL if the sample buffer
244 * should be allocated (in which case the sample must be written to first).
245 *
246 * Creates a new cached RAM sample store. If @location is provided, its allocation
247 * is taken over by the store.
248 *
249 * NOTE: This store type should not be used outside of the #IpatchSampleData
250 * implementation, as it is tightly coupled with it.
251 *
252 * Returns: (type IpatchSampleStoreCache): New cached RAM sample store, cast
253 * as a #IpatchSample for convenience.
254 */
255 IpatchSample *
ipatch_sample_store_cache_new(gpointer location)256 ipatch_sample_store_cache_new(gpointer location)
257 {
258 return (IPATCH_SAMPLE(g_object_new(IPATCH_TYPE_SAMPLE_STORE_CACHE,
259 "location", location,
260 NULL)));
261 }
262
263 /**
264 * ipatch_sample_store_cache_open:
265 * @store: Sample cache store
266 *
267 * A dummy open function which can be used if the location pointer will be
268 * accessed directly, rather than opening a #IpatchSampleHandle. Keeping a
269 * cached sample store open will ensure it isn't destroyed. Call
270 * ipatch_sample_store_cache_close() when done with it.
271 */
272 void
ipatch_sample_store_cache_open(IpatchSampleStoreCache * store)273 ipatch_sample_store_cache_open(IpatchSampleStoreCache *store)
274 {
275 int size;
276
277 g_return_if_fail(IPATCH_IS_SAMPLE_STORE_CACHE(store));
278
279 size = ipatch_sample_store_get_size_bytes((IpatchSampleStore *)store);
280
281 IPATCH_ITEM_WLOCK(store);
282 store->last_open = 0; /* Reset time to 0 to indicate store is open */
283
284 if(store->open_count == 0) /* Recursive lock: store, sample_cache_vars */
285 {
286 _ipatch_sample_data_cache_add_unused_size(-size);
287 }
288
289 g_atomic_int_inc(&store->open_count);
290 IPATCH_ITEM_WUNLOCK(store);
291 }
292
293 /**
294 * ipatch_sample_store_cache_close:
295 * @store: Sample cache store
296 *
297 * A dummy close function which is called after a sample store cache is no
298 * longer needed after opening it with ipatch_sample_store_cache_open().
299 */
300 void
ipatch_sample_store_cache_close(IpatchSampleStoreCache * store)301 ipatch_sample_store_cache_close(IpatchSampleStoreCache *store)
302 {
303 GTimeVal timeval;
304 int size;
305
306 g_return_if_fail(IPATCH_IS_SAMPLE_STORE_CACHE(store));
307
308 size = ipatch_sample_store_get_size_bytes((IpatchSampleStore *)store);
309
310 IPATCH_ITEM_WLOCK(store);
311
312 /* Set last open time if there are no more open handles */
313 if(g_atomic_int_dec_and_test(&store->open_count))
314 {
315 g_get_current_time(&timeval);
316 store->last_open = timeval.tv_sec;
317
318 /* Recursive lock: store, sample_cache_vars */
319 _ipatch_sample_data_cache_add_unused_size(size);
320 }
321
322 IPATCH_ITEM_WUNLOCK(store);
323 }
324