X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=sound%2Fcore%2Fpcm_lib.c;h=eedc6cb038bb172e36c3643dbf7d77031fafc0b0;hb=9464c7cf61b9433057924c36e6e02f303a00e768;hp=0bb142a28539fe93c6be231b715b076821a33b3f;hpb=41689045f6a3cbe0550e1d34e9cc20d2e8c432ba;p=linux-2.6.git

diff --git a/sound/core/pcm_lib.c b/sound/core/pcm_lib.c
index 0bb142a28..eedc6cb03 100644
--- a/sound/core/pcm_lib.c
+++ b/sound/core/pcm_lib.c
@@ -289,7 +289,6 @@ void snd_pcm_set_ops(struct snd_pcm *pcm, int direction, struct snd_pcm_ops *ops
 		substream->ops = ops;
 }
 
-EXPORT_SYMBOL(snd_pcm_set_ops);
 
 /**
  * snd_pcm_sync - set the PCM sync id
@@ -307,12 +306,13 @@ void snd_pcm_set_sync(struct snd_pcm_substream *substream)
 	runtime->sync.id32[3] = -1;
 }
 
-EXPORT_SYMBOL(snd_pcm_set_sync);
-
 /*
  *  Standard ioctl routine
  */
 
+/* Code taken from alsa-lib */
+#define assert(a) snd_assert((a), return -EINVAL)
+
 static inline unsigned int div32(unsigned int a, unsigned int b, 
 				 unsigned int *r)
 {
@@ -369,6 +369,56 @@ static inline unsigned int muldiv32(unsigned int a, unsigned int b,
 	return n;
 }
 
+static int snd_interval_refine_min(struct snd_interval *i, unsigned int min, int openmin)
+{
+	int changed = 0;
+	assert(!snd_interval_empty(i));
+	if (i->min < min) {
+		i->min = min;
+		i->openmin = openmin;
+		changed = 1;
+	} else if (i->min == min && !i->openmin && openmin) {
+		i->openmin = 1;
+		changed = 1;
+	}
+	if (i->integer) {
+		if (i->openmin) {
+			i->min++;
+			i->openmin = 0;
+		}
+	}
+	if (snd_interval_checkempty(i)) {
+		snd_interval_none(i);
+		return -EINVAL;
+	}
+	return changed;
+}
+
+static int snd_interval_refine_max(struct snd_interval *i, unsigned int max, int openmax)
+{
+	int changed = 0;
+	assert(!snd_interval_empty(i));
+	if (i->max > max) {
+		i->max = max;
+		i->openmax = openmax;
+		changed = 1;
+	} else if (i->max == max && !i->openmax && openmax) {
+		i->openmax = 1;
+		changed = 1;
+	}
+	if (i->integer) {
+		if (i->openmax) {
+			i->max--;
+			i->openmax = 0;
+		}
+	}
+	if (snd_interval_checkempty(i)) {
+		snd_interval_none(i);
+		return -EINVAL;
+	}
+	return changed;
+}
+
 /**
  * snd_interval_refine - refine the interval value of configurator
  * @i: the interval value to refine
@@ -383,7 +433,7 @@ static inline unsigned int muldiv32(unsigned int a, unsigned int b,
 int snd_interval_refine(struct snd_interval *i, const struct snd_interval *v)
 {
 	int changed = 0;
-	snd_assert(!snd_interval_empty(i), return -EINVAL);
+	assert(!snd_interval_empty(i));
 	if (i->min < v->min) {
 		i->min = v->min;
 		i->openmin = v->openmin;
@@ -422,11 +472,9 @@ int snd_interval_refine(struct snd_interval *i, const struct snd_interval *v)
 	return changed;
 }
 
-EXPORT_SYMBOL(snd_interval_refine);
-
 static int snd_interval_refine_first(struct snd_interval *i)
 {
-	snd_assert(!snd_interval_empty(i), return -EINVAL);
+	assert(!snd_interval_empty(i));
 	if (snd_interval_single(i))
 		return 0;
 	i->max = i->min;
@@ -438,7 +486,7 @@ static int snd_interval_refine_first(struct snd_interval *i)
 
 static int snd_interval_refine_last(struct snd_interval *i)
 {
-	snd_assert(!snd_interval_empty(i), return -EINVAL);
+	assert(!snd_interval_empty(i));
 	if (snd_interval_single(i))
 		return 0;
 	i->min = i->max;
@@ -448,6 +496,16 @@ static int snd_interval_refine_last(struct snd_interval *i)
 	return 1;
 }
 
+static int snd_interval_refine_set(struct snd_interval *i, unsigned int val)
+{
+	struct snd_interval t;
+	t.empty = 0;
+	t.min = t.max = val;
+	t.openmin = t.openmax = 0;
+	t.integer = 1;
+	return snd_interval_refine(i, &t);
+}
+
 void snd_interval_mul(const struct snd_interval *a, const struct snd_interval *b, struct snd_interval *c)
 {
 	if (a->empty || b->empty) {
@@ -563,6 +621,7 @@ void snd_interval_mulkdiv(const struct snd_interval *a, unsigned int k,
 	c->integer = 0;
 }
 
+#undef assert
 /* ---- */
 
 
@@ -668,8 +727,6 @@ int snd_interval_ratnum(struct snd_interval *i,
 	return err;
 }
 
-EXPORT_SYMBOL(snd_interval_ratnum);
-
 /**
  * snd_interval_ratden - refine the interval value
  * @i: interval to refine
@@ -820,8 +877,6 @@ int snd_interval_list(struct snd_interval *i, unsigned int count, unsigned int *
         return changed;
 }
 
-EXPORT_SYMBOL(snd_interval_list);
-
 static int snd_interval_step(struct snd_interval *i, unsigned int min, unsigned int step)
 {
 	unsigned int n;
@@ -898,8 +953,6 @@ int snd_pcm_hw_rule_add(struct snd_pcm_runtime *runtime, unsigned int cond,
 	return 0;
 }				    
 
-EXPORT_SYMBOL(snd_pcm_hw_rule_add);
-
 /**
  * snd_pcm_hw_constraint_mask
  * @runtime: PCM runtime instance
@@ -954,8 +1007,6 @@ int snd_pcm_hw_constraint_integer(struct snd_pcm_runtime *runtime, snd_pcm_hw_pa
 	return snd_interval_setinteger(constrs_interval(constrs, var));
 }
 
-EXPORT_SYMBOL(snd_pcm_hw_constraint_integer);
-
 /**
  * snd_pcm_hw_constraint_minmax
  * @runtime: PCM runtime instance
@@ -977,8 +1028,6 @@ int snd_pcm_hw_constraint_minmax(struct snd_pcm_runtime *runtime, snd_pcm_hw_par
 	return snd_interval_refine(constrs_interval(constrs, var), &t);
 }
 
-EXPORT_SYMBOL(snd_pcm_hw_constraint_minmax);
-
 static int snd_pcm_hw_rule_list(struct snd_pcm_hw_params *params,
 				struct snd_pcm_hw_rule *rule)
 {
@@ -1006,8 +1055,6 @@ int snd_pcm_hw_constraint_list(struct snd_pcm_runtime *runtime,
 				   var, -1);
 }
 
-EXPORT_SYMBOL(snd_pcm_hw_constraint_list);
-
 static int snd_pcm_hw_rule_ratnums(struct snd_pcm_hw_params *params,
 				   struct snd_pcm_hw_rule *rule)
 {
@@ -1040,8 +1087,6 @@ int snd_pcm_hw_constraint_ratnums(struct snd_pcm_runtime *runtime,
 				   var, -1);
 }
 
-EXPORT_SYMBOL(snd_pcm_hw_constraint_ratnums);
-
 static int snd_pcm_hw_rule_ratdens(struct snd_pcm_hw_params *params,
 				   struct snd_pcm_hw_rule *rule)
 {
@@ -1073,8 +1118,6 @@ int snd_pcm_hw_constraint_ratdens(struct snd_pcm_runtime *runtime,
 				   var, -1);
 }
 
-EXPORT_SYMBOL(snd_pcm_hw_constraint_ratdens);
-
 static int snd_pcm_hw_rule_msbits(struct snd_pcm_hw_params *params,
 				  struct snd_pcm_hw_rule *rule)
 {
@@ -1106,8 +1149,6 @@ int snd_pcm_hw_constraint_msbits(struct snd_pcm_runtime *runtime,
 				    SNDRV_PCM_HW_PARAM_SAMPLE_BITS, -1);
 }
 
-EXPORT_SYMBOL(snd_pcm_hw_constraint_msbits);
-
 static int snd_pcm_hw_rule_step(struct snd_pcm_hw_params *params,
 				struct snd_pcm_hw_rule *rule)
 {
@@ -1132,8 +1173,6 @@ int snd_pcm_hw_constraint_step(struct snd_pcm_runtime *runtime,
 				   var, -1);
 }
 
-EXPORT_SYMBOL(snd_pcm_hw_constraint_step);
-
 static int snd_pcm_hw_rule_pow2(struct snd_pcm_hw_params *params, struct snd_pcm_hw_rule *rule)
 {
 	static int pow2_sizes[] = {
@@ -1161,7 +1200,11 @@ int snd_pcm_hw_constraint_pow2(struct snd_pcm_runtime *runtime,
 				   var, -1);
 }
 
-EXPORT_SYMBOL(snd_pcm_hw_constraint_pow2);
+/* To use the same code we have in alsa-lib */
+#define assert(i) snd_assert((i), return -EINVAL)
+#ifndef INT_MIN
+#define INT_MIN ((int)((unsigned int)INT_MAX+1))
+#endif
 
 static void _snd_pcm_hw_param_any(struct snd_pcm_hw_params *params,
 				  snd_pcm_hw_param_t var)
@@ -1181,6 +1224,18 @@ static void _snd_pcm_hw_param_any(struct snd_pcm_hw_params *params,
 	snd_BUG();
 }
 
+#if 0
+/*
+ * snd_pcm_hw_param_any
+ */
+int snd_pcm_hw_param_any(struct snd_pcm_substream *pcm, struct snd_pcm_hw_params *params,
+			 snd_pcm_hw_param_t var)
+{
+	_snd_pcm_hw_param_any(params, var);
+	return snd_pcm_hw_refine(pcm, params);
+}
+#endif  /*  0  */
+
 void _snd_pcm_hw_params_any(struct snd_pcm_hw_params *params)
 {
 	unsigned int k;
@@ -1192,7 +1247,18 @@ void _snd_pcm_hw_params_any(struct snd_pcm_hw_params *params)
 	params->info = ~0U;
 }
 
-EXPORT_SYMBOL(_snd_pcm_hw_params_any);
+#if 0
+/*
+ * snd_pcm_hw_params_any
+ *
+ * Fill PARAMS with full configuration space boundaries
+ */
+int snd_pcm_hw_params_any(struct snd_pcm_substream *pcm, struct snd_pcm_hw_params *params)
+{
+	_snd_pcm_hw_params_any(params);
+	return snd_pcm_hw_refine(pcm, params);
+}
+#endif  /*  0  */
 
 /**
  * snd_pcm_hw_param_value
@@ -1203,8 +1269,8 @@ EXPORT_SYMBOL(_snd_pcm_hw_params_any);
  * Return the value for field PAR if it's fixed in configuration space 
  *  defined by PARAMS. Return -EINVAL otherwise
  */
-int snd_pcm_hw_param_value(const struct snd_pcm_hw_params *params,
-			   snd_pcm_hw_param_t var, int *dir)
+static int snd_pcm_hw_param_value(const struct snd_pcm_hw_params *params,
+				  snd_pcm_hw_param_t var, int *dir)
 {
 	if (hw_is_mask(var)) {
 		const struct snd_mask *mask = hw_param_mask_c(params, var);
@@ -1222,10 +1288,61 @@ int snd_pcm_hw_param_value(const struct snd_pcm_hw_params *params,
 			*dir = i->openmin;
 		return snd_interval_value(i);
 	}
+	assert(0);
+	return -EINVAL;
+}
+
+/**
+ * snd_pcm_hw_param_value_min
+ * @params: the hw_params instance
+ * @var: parameter to retrieve
+ * @dir: pointer to the direction (-1,0,1) or NULL
+ *
+ * Return the minimum value for field PAR.
+ */
+unsigned int snd_pcm_hw_param_value_min(const struct snd_pcm_hw_params *params,
+					snd_pcm_hw_param_t var, int *dir)
+{
+	if (hw_is_mask(var)) {
+		if (dir)
+			*dir = 0;
+		return snd_mask_min(hw_param_mask_c(params, var));
+	}
+	if (hw_is_interval(var)) {
+		const struct snd_interval *i = hw_param_interval_c(params, var);
+		if (dir)
+			*dir = i->openmin;
+		return snd_interval_min(i);
+	}
+	assert(0);
 	return -EINVAL;
 }
 
-EXPORT_SYMBOL(snd_pcm_hw_param_value);
+/**
+ * snd_pcm_hw_param_value_max
+ * @params: the hw_params instance
+ * @var: parameter to retrieve
+ * @dir: pointer to the direction (-1,0,1) or NULL
+ *
+ * Return the maximum value for field PAR.
+ */
+unsigned int snd_pcm_hw_param_value_max(const struct snd_pcm_hw_params *params,
+					snd_pcm_hw_param_t var, int *dir)
+{
+	if (hw_is_mask(var)) {
+		if (dir)
+			*dir = 0;
+		return snd_mask_max(hw_param_mask_c(params, var));
+	}
+	if (hw_is_interval(var)) {
+		const struct snd_interval *i = hw_param_interval_c(params, var);
+		if (dir)
+			*dir = - (int) i->openmax;
+		return snd_interval_max(i);
+	}
+	assert(0);
+	return -EINVAL;
+}
 
 void _snd_pcm_hw_param_setempty(struct snd_pcm_hw_params *params,
 				snd_pcm_hw_param_t var)
@@ -1243,7 +1360,42 @@ void _snd_pcm_hw_param_setempty(struct snd_pcm_hw_params *params,
 	}
 }
 
-EXPORT_SYMBOL(_snd_pcm_hw_param_setempty);
+int _snd_pcm_hw_param_setinteger(struct snd_pcm_hw_params *params,
+				 snd_pcm_hw_param_t var)
+{
+	int changed;
+	assert(hw_is_interval(var));
+	changed = snd_interval_setinteger(hw_param_interval(params, var));
+	if (changed) {
+		params->cmask |= 1 << var;
+		params->rmask |= 1 << var;
+	}
+	return changed;
+}
+	
+#if 0
+/*
+ * snd_pcm_hw_param_setinteger
+ *
+ * Inside configuration space defined by PARAMS remove from PAR all 
+ * non integer values. Reduce configuration space accordingly.
+ * Return -EINVAL if the configuration space is empty
+ */
+int snd_pcm_hw_param_setinteger(struct snd_pcm_substream *pcm, 
+				struct snd_pcm_hw_params *params,
+				snd_pcm_hw_param_t var)
+{
+	int changed = _snd_pcm_hw_param_setinteger(params, var);
+	if (changed < 0)
+		return changed;
+	if (params->rmask) {
+		int err = snd_pcm_hw_refine(pcm, params);
+		if (err < 0)
+			return err;
+	}
+	return 0;
+}
+#endif  /*  0  */
 
 static int _snd_pcm_hw_param_first(struct snd_pcm_hw_params *params,
 				   snd_pcm_hw_param_t var)
@@ -1253,8 +1405,10 @@ static int _snd_pcm_hw_param_first(struct snd_pcm_hw_params *params,
 		changed = snd_mask_refine_first(hw_param_mask(params, var));
 	else if (hw_is_interval(var))
 		changed = snd_interval_refine_first(hw_param_interval(params, var));
-	else
+	else {
+		assert(0);
 		return -EINVAL;
+	}
 	if (changed) {
 		params->cmask |= 1 << var;
 		params->rmask |= 1 << var;
@@ -1274,22 +1428,20 @@ static int _snd_pcm_hw_param_first(struct snd_pcm_hw_params *params,
  * values > minimum. Reduce configuration space accordingly.
  * Return the minimum.
  */
-int snd_pcm_hw_param_first(struct snd_pcm_substream *pcm, 
-			   struct snd_pcm_hw_params *params, 
-			   snd_pcm_hw_param_t var, int *dir)
+static int snd_pcm_hw_param_first(struct snd_pcm_substream *pcm, 
+				  struct snd_pcm_hw_params *params, 
+				  snd_pcm_hw_param_t var, int *dir)
 {
 	int changed = _snd_pcm_hw_param_first(params, var);
 	if (changed < 0)
 		return changed;
 	if (params->rmask) {
 		int err = snd_pcm_hw_refine(pcm, params);
-		snd_assert(err >= 0, return err);
+		assert(err >= 0);
 	}
 	return snd_pcm_hw_param_value(params, var, dir);
 }
 
-EXPORT_SYMBOL(snd_pcm_hw_param_first);
-
 static int _snd_pcm_hw_param_last(struct snd_pcm_hw_params *params,
 				  snd_pcm_hw_param_t var)
 {
@@ -1298,8 +1450,10 @@ static int _snd_pcm_hw_param_last(struct snd_pcm_hw_params *params,
 		changed = snd_mask_refine_last(hw_param_mask(params, var));
 	else if (hw_is_interval(var))
 		changed = snd_interval_refine_last(hw_param_interval(params, var));
-	else
+	else {
+		assert(0);
 		return -EINVAL;
+	}
 	if (changed) {
 		params->cmask |= 1 << var;
 		params->rmask |= 1 << var;
@@ -1319,21 +1473,381 @@ static int _snd_pcm_hw_param_last(struct snd_pcm_hw_params *params,
  * values < maximum. Reduce configuration space accordingly.
  * Return the maximum.
  */
-int snd_pcm_hw_param_last(struct snd_pcm_substream *pcm, 
-			  struct snd_pcm_hw_params *params,
-			  snd_pcm_hw_param_t var, int *dir)
+static int snd_pcm_hw_param_last(struct snd_pcm_substream *pcm, 
+				 struct snd_pcm_hw_params *params,
+				 snd_pcm_hw_param_t var, int *dir)
 {
 	int changed = _snd_pcm_hw_param_last(params, var);
 	if (changed < 0)
 		return changed;
 	if (params->rmask) {
 		int err = snd_pcm_hw_refine(pcm, params);
-		snd_assert(err >= 0, return err);
+		assert(err >= 0);
 	}
 	return snd_pcm_hw_param_value(params, var, dir);
 }
 
-EXPORT_SYMBOL(snd_pcm_hw_param_last);
+int _snd_pcm_hw_param_min(struct snd_pcm_hw_params *params,
+			  snd_pcm_hw_param_t var, unsigned int val, int dir)
+{
+	int changed;
+	int open = 0;
+	if (dir) {
+		if (dir > 0) {
+			open = 1;
+		} else if (dir < 0) {
+			if (val > 0) {
+				open = 1;
+				val--;
+			}
+		}
+	}
+	if (hw_is_mask(var))
+		changed = snd_mask_refine_min(hw_param_mask(params, var), val + !!open);
+	else if (hw_is_interval(var))
+		changed = snd_interval_refine_min(hw_param_interval(params, var), val, open);
+	else {
+		assert(0);
+		return -EINVAL;
+	}
+	if (changed) {
+		params->cmask |= 1 << var;
+		params->rmask |= 1 << var;
+	}
+	return changed;
+}
+
+/**
+ * snd_pcm_hw_param_min
+ * @pcm: PCM instance
+ * @params: the hw_params instance
+ * @var: parameter to retrieve
+ * @val: minimal value
+ * @dir: pointer to the direction (-1,0,1) or NULL
+ *
+ * Inside configuration space defined by PARAMS remove from PAR all 
+ * values < VAL. Reduce configuration space accordingly.
+ * Return new minimum or -EINVAL if the configuration space is empty
+ */
+static int snd_pcm_hw_param_min(struct snd_pcm_substream *pcm, struct snd_pcm_hw_params *params,
+				snd_pcm_hw_param_t var, unsigned int val,
+				int *dir)
+{
+	int changed = _snd_pcm_hw_param_min(params, var, val, dir ? *dir : 0);
+	if (changed < 0)
+		return changed;
+	if (params->rmask) {
+		int err = snd_pcm_hw_refine(pcm, params);
+		if (err < 0)
+			return err;
+	}
+	return snd_pcm_hw_param_value_min(params, var, dir);
+}
+
+static int _snd_pcm_hw_param_max(struct snd_pcm_hw_params *params,
+				 snd_pcm_hw_param_t var, unsigned int val,
+				 int dir)
+{
+	int changed;
+	int open = 0;
+	if (dir) {
+		if (dir < 0) {
+			open = 1;
+		} else if (dir > 0) {
+			open = 1;
+			val++;
+		}
+	}
+	if (hw_is_mask(var)) {
+		if (val == 0 && open) {
+			snd_mask_none(hw_param_mask(params, var));
+			changed = -EINVAL;
+		} else
+			changed = snd_mask_refine_max(hw_param_mask(params, var), val - !!open);
+	} else if (hw_is_interval(var))
+		changed = snd_interval_refine_max(hw_param_interval(params, var), val, open);
+	else {
+		assert(0);
+		return -EINVAL;
+	}
+	if (changed) {
+		params->cmask |= 1 << var;
+		params->rmask |= 1 << var;
+	}
+	return changed;
+}
+
+/**
+ * snd_pcm_hw_param_max
+ * @pcm: PCM instance
+ * @params: the hw_params instance
+ * @var: parameter to retrieve
+ * @val: maximal value
+ * @dir: pointer to the direction (-1,0,1) or NULL
+ *
+ * Inside configuration space defined by PARAMS remove from PAR all 
+ *  values >= VAL + 1. Reduce configuration space accordingly.
+ *  Return new maximum or -EINVAL if the configuration space is empty
+ */
+static int snd_pcm_hw_param_max(struct snd_pcm_substream *pcm, struct snd_pcm_hw_params *params,
+				snd_pcm_hw_param_t var, unsigned int val,
+				int *dir)
+{
+	int changed = _snd_pcm_hw_param_max(params, var, val, dir ? *dir : 0);
+	if (changed < 0)
+		return changed;
+	if (params->rmask) {
+		int err = snd_pcm_hw_refine(pcm, params);
+		if (err < 0)
+			return err;
+	}
+	return snd_pcm_hw_param_value_max(params, var, dir);
+}
+
+int _snd_pcm_hw_param_set(struct snd_pcm_hw_params *params,
+			  snd_pcm_hw_param_t var, unsigned int val, int dir)
+{
+	int changed;
+	if (hw_is_mask(var)) {
+		struct snd_mask *m = hw_param_mask(params, var);
+		if (val == 0 && dir < 0) {
+			changed = -EINVAL;
+			snd_mask_none(m);
+		} else {
+			if (dir > 0)
+				val++;
+			else if (dir < 0)
+				val--;
+			changed = snd_mask_refine_set(hw_param_mask(params, var), val);
+		}
+	} else if (hw_is_interval(var)) {
+		struct snd_interval *i = hw_param_interval(params, var);
+		if (val == 0 && dir < 0) {
+			changed = -EINVAL;
+			snd_interval_none(i);
+		} else if (dir == 0)
+			changed = snd_interval_refine_set(i, val);
+		else {
+			struct snd_interval t;
+			t.openmin = 1;
+			t.openmax = 1;
+			t.empty = 0;
+			t.integer = 0;
+			if (dir < 0) {
+				t.min = val - 1;
+				t.max = val;
+			} else {
+				t.min = val;
+				t.max = val+1;
+			}
+			changed = snd_interval_refine(i, &t);
+		}
+	} else {
+		assert(0);
+		return -EINVAL;
+	}
+	if (changed) {
+		params->cmask |= 1 << var;
+		params->rmask |= 1 << var;
+	}
+	return changed;
+}
+
+/**
+ * snd_pcm_hw_param_set
+ * @pcm: PCM instance
+ * @params: the hw_params instance
+ * @var: parameter to retrieve
+ * @val: value to set
+ * @dir: pointer to the direction (-1,0,1) or NULL
+ *
+ * Inside configuration space defined by PARAMS remove from PAR all 
+ * values != VAL. Reduce configuration space accordingly.
+ *  Return VAL or -EINVAL if the configuration space is empty
+ */
+int snd_pcm_hw_param_set(struct snd_pcm_substream *pcm, struct snd_pcm_hw_params *params,
+			 snd_pcm_hw_param_t var, unsigned int val, int dir)
+{
+	int changed = _snd_pcm_hw_param_set(params, var, val, dir);
+	if (changed < 0)
+		return changed;
+	if (params->rmask) {
+		int err = snd_pcm_hw_refine(pcm, params);
+		if (err < 0)
+			return err;
+	}
+	return snd_pcm_hw_param_value(params, var, NULL);
+}
+
+static int _snd_pcm_hw_param_mask(struct snd_pcm_hw_params *params,
+				  snd_pcm_hw_param_t var, const struct snd_mask *val)
+{
+	int changed;
+	assert(hw_is_mask(var));
+	changed = snd_mask_refine(hw_param_mask(params, var), val);
+	if (changed) {
+		params->cmask |= 1 << var;
+		params->rmask |= 1 << var;
+	}
+	return changed;
+}
+
+/**
+ * snd_pcm_hw_param_mask
+ * @pcm: PCM instance
+ * @params: the hw_params instance
+ * @var: parameter to retrieve
+ * @val: mask to apply
+ *
+ * Inside configuration space defined by PARAMS remove from PAR all values
+ * not contained in MASK. Reduce configuration space accordingly.
+ * This function can be called only for SNDRV_PCM_HW_PARAM_ACCESS,
+ * SNDRV_PCM_HW_PARAM_FORMAT, SNDRV_PCM_HW_PARAM_SUBFORMAT.
+ * Return 0 on success or -EINVAL
+ * if the configuration space is empty
+ */
+int snd_pcm_hw_param_mask(struct snd_pcm_substream *pcm, struct snd_pcm_hw_params *params,
+			  snd_pcm_hw_param_t var, const struct snd_mask *val)
+{
+	int changed = _snd_pcm_hw_param_mask(params, var, val);
+	if (changed < 0)
+		return changed;
+	if (params->rmask) {
+		int err = snd_pcm_hw_refine(pcm, params);
+		if (err < 0)
+			return err;
+	}
+	return 0;
+}
+
+static int boundary_sub(int a, int adir,
+			int b, int bdir,
+			int *c, int *cdir)
+{
+	adir = adir < 0 ? -1 : (adir > 0 ? 1 : 0);
+	bdir = bdir < 0 ? -1 : (bdir > 0 ? 1 : 0);
+	*c = a - b;
+	*cdir = adir - bdir;
+	if (*cdir == -2) {
+		assert(*c > INT_MIN);
+		(*c)--;
+	} else if (*cdir == 2) {
+		assert(*c < INT_MAX);
+		(*c)++;
+	}
+	return 0;
+}
+
+static int boundary_lt(unsigned int a, int adir,
+		       unsigned int b, int bdir)
+{
+	assert(a > 0 || adir >= 0);
+	assert(b > 0 || bdir >= 0);
+	if (adir < 0) {
+		a--;
+		adir = 1;
+	} else if (adir > 0)
+		adir = 1;
+	if (bdir < 0) {
+		b--;
+		bdir = 1;
+	} else if (bdir > 0)
+		bdir = 1;
+	return a < b || (a == b && adir < bdir);
+}
+
+/* Return 1 if min is nearer to best than max */
+static int boundary_nearer(int min, int mindir,
+			   int best, int bestdir,
+			   int max, int maxdir)
+{
+	int dmin, dmindir;
+	int dmax, dmaxdir;
+	boundary_sub(best, bestdir, min, mindir, &dmin, &dmindir);
+	boundary_sub(max, maxdir, best, bestdir, &dmax, &dmaxdir);
+	return boundary_lt(dmin, dmindir, dmax, dmaxdir);
+}
+
+/**
+ * snd_pcm_hw_param_near
+ * @pcm: PCM instance
+ * @params: the hw_params instance
+ * @var: parameter to retrieve
+ * @best: value to set
+ * @dir: pointer to the direction (-1,0,1) or NULL
+ *
+ * Inside configuration space defined by PARAMS set PAR to the available value
+ * nearest to VAL. Reduce configuration space accordingly.
+ * This function cannot be called for SNDRV_PCM_HW_PARAM_ACCESS,
+ * SNDRV_PCM_HW_PARAM_FORMAT, SNDRV_PCM_HW_PARAM_SUBFORMAT.
+ * Return the value found.
+  */
+int snd_pcm_hw_param_near(struct snd_pcm_substream *pcm, struct snd_pcm_hw_params *params,
+			  snd_pcm_hw_param_t var, unsigned int best, int *dir)
+{
+	struct snd_pcm_hw_params *save = NULL;
+	int v;
+	unsigned int saved_min;
+	int last = 0;
+	int min, max;
+	int mindir, maxdir;
+	int valdir = dir ? *dir : 0;
+	/* FIXME */
+	if (best > INT_MAX)
+		best = INT_MAX;
+	min = max = best;
+	mindir = maxdir = valdir;
+	if (maxdir > 0)
+		maxdir = 0;
+	else if (maxdir == 0)
+		maxdir = -1;
+	else {
+		maxdir = 1;
+		max--;
+	}
+	save = kmalloc(sizeof(*save), GFP_KERNEL);
+	if (save == NULL)
+		return -ENOMEM;
+	*save = *params;
+	saved_min = min;
+	min = snd_pcm_hw_param_min(pcm, params, var, min, &mindir);
+	if (min >= 0) {
+		struct snd_pcm_hw_params *params1;
+		if (max < 0)
+			goto _end;
+		if ((unsigned int)min == saved_min && mindir == valdir)
+			goto _end;
+		params1 = kmalloc(sizeof(*params1), GFP_KERNEL);
+		if (params1 == NULL) {
+			kfree(save);
+			return -ENOMEM;
+		}
+		*params1 = *save;
+		max = snd_pcm_hw_param_max(pcm, params1, var, max, &maxdir);
+		if (max < 0) {
+			kfree(params1);
+			goto _end;
+		}
+		if (boundary_nearer(max, maxdir, best, valdir, min, mindir)) {
+			*params = *params1;
+			last = 1;
+		}
+		kfree(params1);
+	} else {
+		*params = *save;
+		max = snd_pcm_hw_param_max(pcm, params, var, max, &maxdir);
+		assert(max >= 0);
+		last = 1;
+	}
+ _end:
+ 	kfree(save);
+	if (last)
+		v = snd_pcm_hw_param_last(pcm, params, var, dir);
+	else
+		v = snd_pcm_hw_param_first(pcm, params, var, dir);
+	assert(v >= 0);
+	return v;
+}
 
 /**
  * snd_pcm_hw_param_choose
@@ -1345,32 +1859,39 @@ EXPORT_SYMBOL(snd_pcm_hw_param_last);
  * first access, first format, first subformat, min channels,
  * min rate, min period time, max buffer size, min tick time
  */
-int snd_pcm_hw_params_choose(struct snd_pcm_substream *pcm,
-			     struct snd_pcm_hw_params *params)
-{
-	static int vars[] = {
-		SNDRV_PCM_HW_PARAM_ACCESS,
-		SNDRV_PCM_HW_PARAM_FORMAT,
-		SNDRV_PCM_HW_PARAM_SUBFORMAT,
-		SNDRV_PCM_HW_PARAM_CHANNELS,
-		SNDRV_PCM_HW_PARAM_RATE,
-		SNDRV_PCM_HW_PARAM_PERIOD_TIME,
-		SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
-		SNDRV_PCM_HW_PARAM_TICK_TIME,
-		-1
-	};
-	int err, *v;
+int snd_pcm_hw_params_choose(struct snd_pcm_substream *pcm, struct snd_pcm_hw_params *params)
+{
+	int err;
+
+	err = snd_pcm_hw_param_first(pcm, params, SNDRV_PCM_HW_PARAM_ACCESS, NULL);
+	assert(err >= 0);
+
+	err = snd_pcm_hw_param_first(pcm, params, SNDRV_PCM_HW_PARAM_FORMAT, NULL);
+	assert(err >= 0);
+
+	err = snd_pcm_hw_param_first(pcm, params, SNDRV_PCM_HW_PARAM_SUBFORMAT, NULL);
+	assert(err >= 0);
+
+	err = snd_pcm_hw_param_first(pcm, params, SNDRV_PCM_HW_PARAM_CHANNELS, NULL);
+	assert(err >= 0);
+
+	err = snd_pcm_hw_param_first(pcm, params, SNDRV_PCM_HW_PARAM_RATE, NULL);
+	assert(err >= 0);
+
+	err = snd_pcm_hw_param_first(pcm, params, SNDRV_PCM_HW_PARAM_PERIOD_TIME, NULL);
+	assert(err >= 0);
+
+	err = snd_pcm_hw_param_last(pcm, params, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, NULL);
+	assert(err >= 0);
+
+	err = snd_pcm_hw_param_first(pcm, params, SNDRV_PCM_HW_PARAM_TICK_TIME, NULL);
+	assert(err >= 0);
 
-	for (v = vars; *v != -1; v++) {
-		if (*v != SNDRV_PCM_HW_PARAM_BUFFER_SIZE)
-			err = snd_pcm_hw_param_first(pcm, params, *v, NULL);
-		else
-			err = snd_pcm_hw_param_last(pcm, params, *v, NULL);
-		snd_assert(err >= 0, return err);
-	}
 	return 0;
 }
 
+#undef assert
+
 static int snd_pcm_lib_ioctl_reset(struct snd_pcm_substream *substream,
 				   void *arg)
 {
@@ -1446,8 +1967,6 @@ int snd_pcm_lib_ioctl(struct snd_pcm_substream *substream,
 	return -ENXIO;
 }
 
-EXPORT_SYMBOL(snd_pcm_lib_ioctl);
-
 /*
  *  Conditions
  */
@@ -1582,8 +2101,6 @@ void snd_pcm_period_elapsed(struct snd_pcm_substream *substream)
 	kill_fasync(&runtime->fasync, SIGIO, POLL_IN);
 }
 
-EXPORT_SYMBOL(snd_pcm_period_elapsed);
-
 static int snd_pcm_lib_write_transfer(struct snd_pcm_substream *substream,
 				      unsigned int hwoff,
 				      unsigned long data, unsigned int off,
@@ -1782,7 +2299,7 @@ snd_pcm_sframes_t snd_pcm_lib_write(struct snd_pcm_substream *substream, const v
 	if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
 		return -EBADFD;
 
-	nonblock = !!(substream->f_flags & O_NONBLOCK);
+	nonblock = !!(substream->ffile->f_flags & O_NONBLOCK);
 
 	if (runtime->access != SNDRV_PCM_ACCESS_RW_INTERLEAVED &&
 	    runtime->channels > 1)
@@ -1791,8 +2308,6 @@ snd_pcm_sframes_t snd_pcm_lib_write(struct snd_pcm_substream *substream, const v
 				  snd_pcm_lib_write_transfer);
 }
 
-EXPORT_SYMBOL(snd_pcm_lib_write);
-
 static int snd_pcm_lib_writev_transfer(struct snd_pcm_substream *substream,
 				       unsigned int hwoff,
 				       unsigned long data, unsigned int off,
@@ -1847,7 +2362,7 @@ snd_pcm_sframes_t snd_pcm_lib_writev(struct snd_pcm_substream *substream,
 	if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
 		return -EBADFD;
 
-	nonblock = !!(substream->f_flags & O_NONBLOCK);
+	nonblock = !!(substream->ffile->f_flags & O_NONBLOCK);
 
 	if (runtime->access != SNDRV_PCM_ACCESS_RW_NONINTERLEAVED)
 		return -EINVAL;
@@ -1855,8 +2370,6 @@ snd_pcm_sframes_t snd_pcm_lib_writev(struct snd_pcm_substream *substream,
 				  nonblock, snd_pcm_lib_writev_transfer);
 }
 
-EXPORT_SYMBOL(snd_pcm_lib_writev);
-
 static int snd_pcm_lib_read_transfer(struct snd_pcm_substream *substream, 
 				     unsigned int hwoff,
 				     unsigned long data, unsigned int off,
@@ -2059,14 +2572,12 @@ snd_pcm_sframes_t snd_pcm_lib_read(struct snd_pcm_substream *substream, void __u
 	if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
 		return -EBADFD;
 
-	nonblock = !!(substream->f_flags & O_NONBLOCK);
+	nonblock = !!(substream->ffile->f_flags & O_NONBLOCK);
 	if (runtime->access != SNDRV_PCM_ACCESS_RW_INTERLEAVED)
 		return -EINVAL;
 	return snd_pcm_lib_read1(substream, (unsigned long)buf, size, nonblock, snd_pcm_lib_read_transfer);
 }
 
-EXPORT_SYMBOL(snd_pcm_lib_read);
-
 static int snd_pcm_lib_readv_transfer(struct snd_pcm_substream *substream,
 				      unsigned int hwoff,
 				      unsigned long data, unsigned int off,
@@ -2118,10 +2629,58 @@ snd_pcm_sframes_t snd_pcm_lib_readv(struct snd_pcm_substream *substream,
 	if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
 		return -EBADFD;
 
-	nonblock = !!(substream->f_flags & O_NONBLOCK);
+	nonblock = !!(substream->ffile->f_flags & O_NONBLOCK);
 	if (runtime->access != SNDRV_PCM_ACCESS_RW_NONINTERLEAVED)
 		return -EINVAL;
 	return snd_pcm_lib_read1(substream, (unsigned long)bufs, frames, nonblock, snd_pcm_lib_readv_transfer);
 }
 
+/*
+ *  Exported symbols
+ */
+
+EXPORT_SYMBOL(snd_interval_refine);
+EXPORT_SYMBOL(snd_interval_list);
+EXPORT_SYMBOL(snd_interval_ratnum);
+EXPORT_SYMBOL(_snd_pcm_hw_params_any);
+EXPORT_SYMBOL(_snd_pcm_hw_param_min);
+EXPORT_SYMBOL(_snd_pcm_hw_param_set);
+EXPORT_SYMBOL(_snd_pcm_hw_param_setempty);
+EXPORT_SYMBOL(_snd_pcm_hw_param_setinteger);
+EXPORT_SYMBOL(snd_pcm_hw_param_value_min);
+EXPORT_SYMBOL(snd_pcm_hw_param_value_max);
+EXPORT_SYMBOL(snd_pcm_hw_param_mask);
+EXPORT_SYMBOL(snd_pcm_hw_param_first);
+EXPORT_SYMBOL(snd_pcm_hw_param_last);
+EXPORT_SYMBOL(snd_pcm_hw_param_near);
+EXPORT_SYMBOL(snd_pcm_hw_param_set);
+EXPORT_SYMBOL(snd_pcm_hw_refine);
+EXPORT_SYMBOL(snd_pcm_hw_constraints_init);
+EXPORT_SYMBOL(snd_pcm_hw_constraints_complete);
+EXPORT_SYMBOL(snd_pcm_hw_constraint_list);
+EXPORT_SYMBOL(snd_pcm_hw_constraint_step);
+EXPORT_SYMBOL(snd_pcm_hw_constraint_ratnums);
+EXPORT_SYMBOL(snd_pcm_hw_constraint_ratdens);
+EXPORT_SYMBOL(snd_pcm_hw_constraint_msbits);
+EXPORT_SYMBOL(snd_pcm_hw_constraint_minmax);
+EXPORT_SYMBOL(snd_pcm_hw_constraint_integer);
+EXPORT_SYMBOL(snd_pcm_hw_constraint_pow2);
+EXPORT_SYMBOL(snd_pcm_hw_rule_add);
+EXPORT_SYMBOL(snd_pcm_set_ops);
+EXPORT_SYMBOL(snd_pcm_set_sync);
+EXPORT_SYMBOL(snd_pcm_lib_ioctl);
+EXPORT_SYMBOL(snd_pcm_stop);
+EXPORT_SYMBOL(snd_pcm_period_elapsed);
+EXPORT_SYMBOL(snd_pcm_lib_write);
+EXPORT_SYMBOL(snd_pcm_lib_read);
+EXPORT_SYMBOL(snd_pcm_lib_writev);
 EXPORT_SYMBOL(snd_pcm_lib_readv);
+EXPORT_SYMBOL(snd_pcm_lib_buffer_bytes);
+EXPORT_SYMBOL(snd_pcm_lib_period_bytes);
+/* pcm_memory.c */
+EXPORT_SYMBOL(snd_pcm_lib_preallocate_free_for_all);
+EXPORT_SYMBOL(snd_pcm_lib_preallocate_pages);
+EXPORT_SYMBOL(snd_pcm_lib_preallocate_pages_for_all);
+EXPORT_SYMBOL(snd_pcm_sgbuf_ops_page);
+EXPORT_SYMBOL(snd_pcm_lib_malloc_pages);
+EXPORT_SYMBOL(snd_pcm_lib_free_pages);