[deliverable/linux.git] / include / sound / pcm_params.h

#ifndef __SOUND_PCM_PARAMS_H
#define __SOUND_PCM_PARAMS_H

/*
 *  PCM params helpers
 *  Copyright (c) by Abramo Bagnara <abramo@alsa-project.org>
 *
 *
 *   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
 *
 */

extern int snd_pcm_hw_param_mask(snd_pcm_substream_t *pcm, snd_pcm_hw_params_t *params,
				 snd_pcm_hw_param_t var, const snd_mask_t *val);
extern unsigned int snd_pcm_hw_param_value_min(const snd_pcm_hw_params_t *params,
					       snd_pcm_hw_param_t var, int *dir);
extern unsigned int snd_pcm_hw_param_value_max(const snd_pcm_hw_params_t *params,
					       snd_pcm_hw_param_t var, int *dir);
extern int _snd_pcm_hw_param_min(snd_pcm_hw_params_t *params,
				 snd_pcm_hw_param_t var, unsigned int val, int dir);
extern int _snd_pcm_hw_param_setinteger(snd_pcm_hw_params_t *params,
					snd_pcm_hw_param_t var);
extern int _snd_pcm_hw_param_set(snd_pcm_hw_params_t *params,
				 snd_pcm_hw_param_t var, unsigned int val, int dir);

/* To share the same code we have  alsa-lib */
#define INLINE static inline
#define assert(a) (void)(a)

#define SNDRV_MASK_BITS	64	/* we use so far 64bits only */
#define SNDRV_MASK_SIZE	(SNDRV_MASK_BITS / 32)
#define MASK_OFS(i)	((i) >> 5)
#define MASK_BIT(i)	(1U << ((i) & 31))

INLINE unsigned int ld2(u_int32_t v)
{
        unsigned r = 0;

        if (v >= 0x10000) {
                v >>= 16;
                r += 16;
        }
        if (v >= 0x100) {
                v >>= 8;
                r += 8;
        }
        if (v >= 0x10) {
                v >>= 4;
                r += 4;
        }
        if (v >= 4) {
                v >>= 2;
                r += 2;
        }
        if (v >= 2)
                r++;
        return r;
}

INLINE size_t snd_mask_sizeof(void)
{
	return sizeof(snd_mask_t);
}

INLINE void snd_mask_none(snd_mask_t *mask)
{
	memset(mask, 0, sizeof(*mask));
}

INLINE void snd_mask_any(snd_mask_t *mask)
{
	memset(mask, 0xff, SNDRV_MASK_SIZE * sizeof(u_int32_t));
}

INLINE int snd_mask_empty(const snd_mask_t *mask)
{
	int i;
	for (i = 0; i < SNDRV_MASK_SIZE; i++)
		if (mask->bits[i])
			return 0;
	return 1;
}

INLINE unsigned int snd_mask_min(const snd_mask_t *mask)
{
	int i;
	assert(!snd_mask_empty(mask));
	for (i = 0; i < SNDRV_MASK_SIZE; i++) {
		if (mask->bits[i])
			return ffs(mask->bits[i]) - 1 + (i << 5);
	}
	return 0;
}

INLINE unsigned int snd_mask_max(const snd_mask_t *mask)
{
	int i;
	assert(!snd_mask_empty(mask));
	for (i = SNDRV_MASK_SIZE - 1; i >= 0; i--) {
		if (mask->bits[i])
			return ld2(mask->bits[i]) + (i << 5);
	}
	return 0;
}

INLINE void snd_mask_set(snd_mask_t *mask, unsigned int val)
{
	assert(val <= SNDRV_MASK_BITS);
	mask->bits[MASK_OFS(val)] |= MASK_BIT(val);
}

INLINE void snd_mask_reset(snd_mask_t *mask, unsigned int val)
{
	assert(val <= SNDRV_MASK_BITS);
	mask->bits[MASK_OFS(val)] &= ~MASK_BIT(val);
}

INLINE void snd_mask_set_range(snd_mask_t *mask, unsigned int from, unsigned int to)
{
	unsigned int i;
	assert(to <= SNDRV_MASK_BITS && from <= to);
	for (i = from; i <= to; i++)
		mask->bits[MASK_OFS(i)] |= MASK_BIT(i);
}

INLINE void snd_mask_reset_range(snd_mask_t *mask, unsigned int from, unsigned int to)
{
	unsigned int i;
	assert(to <= SNDRV_MASK_BITS && from <= to);
	for (i = from; i <= to; i++)
		mask->bits[MASK_OFS(i)] &= ~MASK_BIT(i);
}

INLINE void snd_mask_leave(snd_mask_t *mask, unsigned int val)
{
	unsigned int v;
	assert(val <= SNDRV_MASK_BITS);
	v = mask->bits[MASK_OFS(val)] & MASK_BIT(val);
	snd_mask_none(mask);
	mask->bits[MASK_OFS(val)] = v;
}

INLINE void snd_mask_intersect(snd_mask_t *mask, const snd_mask_t *v)
{
	int i;
	for (i = 0; i < SNDRV_MASK_SIZE; i++)
		mask->bits[i] &= v->bits[i];
}

INLINE int snd_mask_eq(const snd_mask_t *mask, const snd_mask_t *v)
{
	return ! memcmp(mask, v, SNDRV_MASK_SIZE * sizeof(u_int32_t));
}

INLINE void snd_mask_copy(snd_mask_t *mask, const snd_mask_t *v)
{
	*mask = *v;
}

INLINE int snd_mask_test(const snd_mask_t *mask, unsigned int val)
{
	assert(val <= SNDRV_MASK_BITS);
	return mask->bits[MASK_OFS(val)] & MASK_BIT(val);
}

INLINE int snd_mask_single(const snd_mask_t *mask)
{
	int i, c = 0;
	assert(!snd_mask_empty(mask));
	for (i = 0; i < SNDRV_MASK_SIZE; i++) {
		if (! mask->bits[i])
			continue;
		if (mask->bits[i] & (mask->bits[i] - 1))
			return 0;
		if (c)
			return 0;
		c++;
	}
	return 1;
}

INLINE int snd_mask_refine(snd_mask_t *mask, const snd_mask_t *v)
{
	snd_mask_t old;
	assert(!snd_mask_empty(mask));
	snd_mask_copy(&old, mask);
	snd_mask_intersect(mask, v);
	if (snd_mask_empty(mask))
		return -EINVAL;
	return !snd_mask_eq(mask, &old);
}

INLINE int snd_mask_refine_first(snd_mask_t *mask)
{
	assert(!snd_mask_empty(mask));
	if (snd_mask_single(mask))
		return 0;
	snd_mask_leave(mask, snd_mask_min(mask));
	return 1;
}

INLINE int snd_mask_refine_last(snd_mask_t *mask)
{
	assert(!snd_mask_empty(mask));
	if (snd_mask_single(mask))
		return 0;
	snd_mask_leave(mask, snd_mask_max(mask));
	return 1;
}

INLINE int snd_mask_refine_min(snd_mask_t *mask, unsigned int val)
{
	assert(!snd_mask_empty(mask));
	if (snd_mask_min(mask) >= val)
		return 0;
	snd_mask_reset_range(mask, 0, val - 1);
	if (snd_mask_empty(mask))
		return -EINVAL;
	return 1;
}

INLINE int snd_mask_refine_max(snd_mask_t *mask, unsigned int val)
{
	assert(!snd_mask_empty(mask));
	if (snd_mask_max(mask) <= val)
		return 0;
	snd_mask_reset_range(mask, val + 1, SNDRV_MASK_BITS);
	if (snd_mask_empty(mask))
		return -EINVAL;
	return 1;
}

INLINE int snd_mask_refine_set(snd_mask_t *mask, unsigned int val)
{
	int changed;
	assert(!snd_mask_empty(mask));
	changed = !snd_mask_single(mask);
	snd_mask_leave(mask, val);
	if (snd_mask_empty(mask))
		return -EINVAL;
	return changed;
}

INLINE int snd_mask_value(const snd_mask_t *mask)
{
	assert(!snd_mask_empty(mask));
	return snd_mask_min(mask);
}

INLINE void snd_interval_any(snd_interval_t *i)
{
	i->min = 0;
	i->openmin = 0;
	i->max = UINT_MAX;
	i->openmax = 0;
	i->integer = 0;
	i->empty = 0;
}

INLINE void snd_interval_none(snd_interval_t *i)
{
	i->empty = 1;
}

INLINE int snd_interval_checkempty(const snd_interval_t *i)
{
	return (i->min > i->max ||
		(i->min == i->max && (i->openmin || i->openmax)));
}

INLINE int snd_interval_empty(const snd_interval_t *i)
{
	return i->empty;
}

INLINE int snd_interval_single(const snd_interval_t *i)
{
	assert(!snd_interval_empty(i));
	return (i->min == i->max || 
		(i->min + 1 == i->max && i->openmax));
}

INLINE int snd_interval_value(const snd_interval_t *i)
{
	assert(snd_interval_single(i));
	return i->min;
}

INLINE int snd_interval_min(const snd_interval_t *i)
{
	assert(!snd_interval_empty(i));
	return i->min;
}

INLINE int snd_interval_max(const snd_interval_t *i)
{
	unsigned int v;
	assert(!snd_interval_empty(i));
	v = i->max;
	if (i->openmax)
		v--;
	return v;
}

INLINE int snd_interval_test(const snd_interval_t *i, unsigned int val)
{
	return !((i->min > val || (i->min == val && i->openmin) ||
		  i->max < val || (i->max == val && i->openmax)));
}

INLINE void snd_interval_copy(snd_interval_t *d, const snd_interval_t *s)
{
	*d = *s;
}

INLINE int snd_interval_setinteger(snd_interval_t *i)
{
	if (i->integer)
		return 0;
	if (i->openmin && i->openmax && i->min == i->max)
		return -EINVAL;
	i->integer = 1;
	return 1;
}

INLINE int snd_interval_eq(const snd_interval_t *i1, const snd_interval_t *i2)
{
	if (i1->empty)
		return i2->empty;
	if (i2->empty)
		return i1->empty;
	return i1->min == i2->min && i1->openmin == i2->openmin &&
		i1->max == i2->max && i1->openmax == i2->openmax;
}

static inline unsigned int add(unsigned int a, unsigned int b)
{
	if (a >= UINT_MAX - b)
		return UINT_MAX;
	return a + b;
}

static inline unsigned int sub(unsigned int a, unsigned int b)
{
	if (a > b)
		return a - b;
	return 0;
}

#undef INLINE
#undef assert

#endif /* __SOUND_PCM_PARAMS_H */
Commit	Line	Data
1da177e4 LT	1	#ifndef __SOUND_PCM_PARAMS_H
	2	#define __SOUND_PCM_PARAMS_H
	3
	4	/*
	5	* PCM params helpers
	6	* Copyright (c) by Abramo Bagnara <abramo@alsa-project.org>
	7	*
	8	*
	9	* This program is free software; you can redistribute it and/or modify
	10	* it under the terms of the GNU General Public License as published by
	11	* the Free Software Foundation; either version 2 of the License, or
	12	* (at your option) any later version.
	13	*
	14	* This program is distributed in the hope that it will be useful,
	15	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	16	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	17	* GNU General Public License for more details.
	18	*
	19	* You should have received a copy of the GNU General Public License
	20	* along with this program; if not, write to the Free Software
	21	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	22	*
	23	*/
	24
	25	extern int snd_pcm_hw_param_mask(snd_pcm_substream_t pcm, snd_pcm_hw_params_t params,
	26	snd_pcm_hw_param_t var, const snd_mask_t *val);
	27	extern unsigned int snd_pcm_hw_param_value_min(const snd_pcm_hw_params_t *params,
	28	snd_pcm_hw_param_t var, int *dir);
	29	extern unsigned int snd_pcm_hw_param_value_max(const snd_pcm_hw_params_t *params,
	30	snd_pcm_hw_param_t var, int *dir);
	31	extern int _snd_pcm_hw_param_min(snd_pcm_hw_params_t *params,
	32	snd_pcm_hw_param_t var, unsigned int val, int dir);
	33	extern int _snd_pcm_hw_param_setinteger(snd_pcm_hw_params_t *params,
	34	snd_pcm_hw_param_t var);
	35	extern int _snd_pcm_hw_param_set(snd_pcm_hw_params_t *params,
	36	snd_pcm_hw_param_t var, unsigned int val, int dir);
	37
	38	/* To share the same code we have alsa-lib */
	39	#define INLINE static inline
	40	#define assert(a) (void)(a)
	41
	42	#define SNDRV_MASK_BITS 64 /* we use so far 64bits only */
	43	#define SNDRV_MASK_SIZE (SNDRV_MASK_BITS / 32)
	44	#define MASK_OFS(i) ((i) >> 5)
	45	#define MASK_BIT(i) (1U << ((i) & 31))
	46
	47	INLINE unsigned int ld2(u_int32_t v)
	48	{
	49	unsigned r = 0;
	50
	51	if (v >= 0x10000) {
	52	v >>= 16;
	53	r += 16;
	54	}
	55	if (v >= 0x100) {
	56	v >>= 8;
	57	r += 8;
	58	}
	59	if (v >= 0x10) {
	60	v >>= 4;
	61	r += 4;
	62	}
	63	if (v >= 4) {
	64	v >>= 2;
65	r += 2;
66	}
67	if (v >= 2)
68	r++;
69	return r;
70	}
71
72	INLINE size_t snd_mask_sizeof(void)
73	{
74	return sizeof(snd_mask_t);
75	}
76
77	INLINE void snd_mask_none(snd_mask_t *mask)
78	{
79	memset(mask, 0, sizeof(*mask));
80	}
81
82	INLINE void snd_mask_any(snd_mask_t *mask)
83	{
84	memset(mask, 0xff, SNDRV_MASK_SIZE * sizeof(u_int32_t));
85	}
86
87	INLINE int snd_mask_empty(const snd_mask_t *mask)
88	{
89	int i;
90	for (i = 0; i < SNDRV_MASK_SIZE; i++)
91	if (mask->bits[i])
92	return 0;
93	return 1;
94	}
95
96	INLINE unsigned int snd_mask_min(const snd_mask_t *mask)
97	{
98	int i;
99	assert(!snd_mask_empty(mask));
100	for (i = 0; i < SNDRV_MASK_SIZE; i++) {
101	if (mask->bits[i])
102	return ffs(mask->bits[i]) - 1 + (i << 5);
103	}
104	return 0;
105	}
106
107	INLINE unsigned int snd_mask_max(const snd_mask_t *mask)
108	{
109	int i;
110	assert(!snd_mask_empty(mask));
111	for (i = SNDRV_MASK_SIZE - 1; i >= 0; i--) {
112	if (mask->bits[i])
113	return ld2(mask->bits[i]) + (i << 5);
114	}
115	return 0;
116	}
117
118	INLINE void snd_mask_set(snd_mask_t *mask, unsigned int val)
119	{
120	assert(val <= SNDRV_MASK_BITS);
121	mask->bits[MASK_OFS(val)] \|= MASK_BIT(val);
122	}
123
124	INLINE void snd_mask_reset(snd_mask_t *mask, unsigned int val)
125	{
126	assert(val <= SNDRV_MASK_BITS);
127	mask->bits[MASK_OFS(val)] &= ~MASK_BIT(val);
128	}
129
130	INLINE void snd_mask_set_range(snd_mask_t *mask, unsigned int from, unsigned int to)
131	{
132	unsigned int i;
133	assert(to <= SNDRV_MASK_BITS && from <= to);
134	for (i = from; i <= to; i++)
135	mask->bits[MASK_OFS(i)] \|= MASK_BIT(i);
136	}
137
138	INLINE void snd_mask_reset_range(snd_mask_t *mask, unsigned int from, unsigned int to)
139	{
140	unsigned int i;
141	assert(to <= SNDRV_MASK_BITS && from <= to);
142	for (i = from; i <= to; i++)
143	mask->bits[MASK_OFS(i)] &= ~MASK_BIT(i);
144	}
145
146	INLINE void snd_mask_leave(snd_mask_t *mask, unsigned int val)
147	{
148	unsigned int v;
149	assert(val <= SNDRV_MASK_BITS);
150	v = mask->bits[MASK_OFS(val)] & MASK_BIT(val);
151	snd_mask_none(mask);
152	mask->bits[MASK_OFS(val)] = v;
153	}
154
155	INLINE void snd_mask_intersect(snd_mask_t mask, const snd_mask_t v)
156	{
157	int i;
158	for (i = 0; i < SNDRV_MASK_SIZE; i++)
159	mask->bits[i] &= v->bits[i];
160	}
161
162	INLINE int snd_mask_eq(const snd_mask_t mask, const snd_mask_t v)
163	{
164	return ! memcmp(mask, v, SNDRV_MASK_SIZE * sizeof(u_int32_t));
165	}
166
167	INLINE void snd_mask_copy(snd_mask_t mask, const snd_mask_t v)
168	{
169	mask = v;
170	}
171
172	INLINE int snd_mask_test(const snd_mask_t *mask, unsigned int val)
173	{
174	assert(val <= SNDRV_MASK_BITS);
175	return mask->bits[MASK_OFS(val)] & MASK_BIT(val);
176	}
177
178	INLINE int snd_mask_single(const snd_mask_t *mask)
179	{
180	int i, c = 0;
181	assert(!snd_mask_empty(mask));
182	for (i = 0; i < SNDRV_MASK_SIZE; i++) {
183	if (! mask->bits[i])
184	continue;
185	if (mask->bits[i] & (mask->bits[i] - 1))
186	return 0;
187	if (c)
188	return 0;
189	c++;
190	}
191	return 1;
192	}
193
194	INLINE int snd_mask_refine(snd_mask_t mask, const snd_mask_t v)
195	{
196	snd_mask_t old;
197	assert(!snd_mask_empty(mask));
198	snd_mask_copy(&old, mask);
199	snd_mask_intersect(mask, v);
200	if (snd_mask_empty(mask))
201	return -EINVAL;
202	return !snd_mask_eq(mask, &old);
203	}
204
205	INLINE int snd_mask_refine_first(snd_mask_t *mask)
206	{
207	assert(!snd_mask_empty(mask));
208	if (snd_mask_single(mask))
209	return 0;
210	snd_mask_leave(mask, snd_mask_min(mask));
211	return 1;
212	}
213
214	INLINE int snd_mask_refine_last(snd_mask_t *mask)
215	{
216	assert(!snd_mask_empty(mask));
217	if (snd_mask_single(mask))
218	return 0;
219	snd_mask_leave(mask, snd_mask_max(mask));
220	return 1;
221	}
222
223	INLINE int snd_mask_refine_min(snd_mask_t *mask, unsigned int val)
224	{
225	assert(!snd_mask_empty(mask));
226	if (snd_mask_min(mask) >= val)
227	return 0;
228	snd_mask_reset_range(mask, 0, val - 1);
229	if (snd_mask_empty(mask))
230	return -EINVAL;
231	return 1;
232	}
233
234	INLINE int snd_mask_refine_max(snd_mask_t *mask, unsigned int val)
235	{
236	assert(!snd_mask_empty(mask));
237	if (snd_mask_max(mask) <= val)
238	return 0;
239	snd_mask_reset_range(mask, val + 1, SNDRV_MASK_BITS);
240	if (snd_mask_empty(mask))
241	return -EINVAL;
242	return 1;
243	}
244
245	INLINE int snd_mask_refine_set(snd_mask_t *mask, unsigned int val)
246	{
247	int changed;
248	assert(!snd_mask_empty(mask));
249	changed = !snd_mask_single(mask);
250	snd_mask_leave(mask, val);
251	if (snd_mask_empty(mask))
252	return -EINVAL;
253	return changed;
254	}
255
256	INLINE int snd_mask_value(const snd_mask_t *mask)
257	{
258	assert(!snd_mask_empty(mask));
259	return snd_mask_min(mask);
260	}
261
262	INLINE void snd_interval_any(snd_interval_t *i)
263	{
264	i->min = 0;
265	i->openmin = 0;
266	i->max = UINT_MAX;
267	i->openmax = 0;
268	i->integer = 0;
269	i->empty = 0;
270	}
271
272	INLINE void snd_interval_none(snd_interval_t *i)
273	{
274	i->empty = 1;
275	}
276
277	INLINE int snd_interval_checkempty(const snd_interval_t *i)
278	{
279	return (i->min > i->max \|\|
280	(i->min == i->max && (i->openmin \|\| i->openmax)));
281	}
282
283	INLINE int snd_interval_empty(const snd_interval_t *i)
284	{
285	return i->empty;
286	}
287
288	INLINE int snd_interval_single(const snd_interval_t *i)
289	{
290	assert(!snd_interval_empty(i));
291	return (i->min == i->max \|\|
292	(i->min + 1 == i->max && i->openmax));
293	}
294
295	INLINE int snd_interval_value(const snd_interval_t *i)
296	{
297	assert(snd_interval_single(i));
298	return i->min;
299	}
300
301	INLINE int snd_interval_min(const snd_interval_t *i)
302	{
303	assert(!snd_interval_empty(i));
304	return i->min;
305	}
306
307	INLINE int snd_interval_max(const snd_interval_t *i)
308	{
309	unsigned int v;
310	assert(!snd_interval_empty(i));
311	v = i->max;
312	if (i->openmax)
313	v--;
314	return v;
315	}
316
317	INLINE int snd_interval_test(const snd_interval_t *i, unsigned int val)
318	{
319	return !((i->min > val \|\| (i->min == val && i->openmin) \|\|
320	i->max < val \|\| (i->max == val && i->openmax)));
321	}
322
323	INLINE void snd_interval_copy(snd_interval_t d, const snd_interval_t s)
324	{
325	d = s;
326	}
327
328	INLINE int snd_interval_setinteger(snd_interval_t *i)
329	{
330	if (i->integer)
331	return 0;
332	if (i->openmin && i->openmax && i->min == i->max)
333	return -EINVAL;
334	i->integer = 1;
335	return 1;
336	}
337
338	INLINE int snd_interval_eq(const snd_interval_t i1, const snd_interval_t i2)
339	{
340	if (i1->empty)
341	return i2->empty;
342	if (i2->empty)
343	return i1->empty;
344	return i1->min == i2->min && i1->openmin == i2->openmin &&
345	i1->max == i2->max && i1->openmax == i2->openmax;
346	}
347
348	static inline unsigned int add(unsigned int a, unsigned int b)
349	{
350	if (a >= UINT_MAX - b)
351	return UINT_MAX;
352	return a + b;
353	}
354
355	static inline unsigned int sub(unsigned int a, unsigned int b)
356	{
357	if (a > b)
358	return a - b;
359	return 0;
360	}
361
362	#undef INLINE
363	#undef assert
364
365	#endif /* __SOUND_PCM_PARAMS_H */
366