/*
* Digital Audio (PCM) abstract layer
- * Copyright (c) by Jaroslav Kysela <perex@suse.cz>
+ * Copyright (c) by Jaroslav Kysela <perex@perex.cz>
* Abramo Bagnara <abramo@alsa-project.org>
*
*
runtime->silence_filled -= frames;
if ((snd_pcm_sframes_t)runtime->silence_filled < 0) {
runtime->silence_filled = 0;
- runtime->silence_start = (ofs + frames) - runtime->buffer_size;
+ runtime->silence_start = new_hw_ptr;
} else {
- runtime->silence_start = ofs - runtime->silence_filled;
+ runtime->silence_start = ofs;
}
- if ((snd_pcm_sframes_t)runtime->silence_start < 0)
- runtime->silence_start += runtime->boundary;
}
frames = runtime->buffer_size - runtime->silence_filled;
}
snd_assert(frames <= runtime->buffer_size, return);
if (frames == 0)
return;
- ofs = (runtime->silence_start + runtime->silence_filled) % runtime->buffer_size;
+ ofs = runtime->silence_start % runtime->buffer_size;
while (frames > 0) {
transfer = ofs + frames > runtime->buffer_size ? runtime->buffer_size - ofs : frames;
if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED ||
static void xrun(struct snd_pcm_substream *substream)
{
snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN);
-#ifdef CONFIG_SND_DEBUG
+#ifdef CONFIG_SND_PCM_XRUN_DEBUG
if (substream->pstr->xrun_debug) {
snd_printd(KERN_DEBUG "XRUN: pcmC%dD%d%c\n",
substream->pcm->card->number,
pos = substream->ops->pointer(substream);
if (pos == SNDRV_PCM_POS_XRUN)
return pos; /* XRUN */
- if (runtime->tstamp_mode & SNDRV_PCM_TSTAMP_MMAP)
- getnstimeofday((struct timespec *)&runtime->status->tstamp);
#ifdef CONFIG_SND_DEBUG
if (pos >= runtime->buffer_size) {
snd_printk(KERN_ERR "BUG: stream = %i, pos = 0x%lx, buffer size = 0x%lx, period size = 0x%lx\n", substream->stream, pos, runtime->buffer_size, runtime->period_size);
snd_pcm_uframes_t new_hw_ptr, hw_ptr_interrupt;
snd_pcm_sframes_t delta;
+ if (runtime->tstamp_mode == SNDRV_PCM_TSTAMP_MMAP)
+ snd_pcm_gettime(runtime, (struct timespec *)&runtime->status->tstamp);
pos = snd_pcm_update_hw_ptr_pos(substream, runtime);
if (pos == SNDRV_PCM_POS_XRUN) {
xrun(substream);
delta = hw_ptr_interrupt - new_hw_ptr;
if (delta > 0) {
if ((snd_pcm_uframes_t)delta < runtime->buffer_size / 2) {
-#ifdef CONFIG_SND_DEBUG
+#ifdef CONFIG_SND_PCM_XRUN_DEBUG
if (runtime->periods > 1 && substream->pstr->xrun_debug) {
snd_printd(KERN_ERR "Unexpected hw_pointer value [1] (stream = %i, delta: -%ld, max jitter = %ld): wrong interrupt acknowledge?\n", substream->stream, (long) delta, runtime->buffer_size / 2);
if (substream->pstr->xrun_debug > 1)
delta = old_hw_ptr - new_hw_ptr;
if (delta > 0) {
if ((snd_pcm_uframes_t)delta < runtime->buffer_size / 2) {
-#ifdef CONFIG_SND_DEBUG
+#ifdef CONFIG_SND_PCM_XRUN_DEBUG
if (runtime->periods > 2 && substream->pstr->xrun_debug) {
snd_printd(KERN_ERR "Unexpected hw_pointer value [2] (stream = %i, delta: -%ld, max jitter = %ld): wrong interrupt acknowledge?\n", substream->stream, (long) delta, runtime->buffer_size / 2);
if (substream->pstr->xrun_debug > 1)
substream->ops = ops;
}
+EXPORT_SYMBOL(snd_pcm_set_ops);
/**
* snd_pcm_sync - set the PCM sync id
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)
{
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
int snd_interval_refine(struct snd_interval *i, const struct snd_interval *v)
{
int changed = 0;
- assert(!snd_interval_empty(i));
+ snd_assert(!snd_interval_empty(i), return -EINVAL);
if (i->min < v->min) {
i->min = v->min;
i->openmin = v->openmin;
return changed;
}
+EXPORT_SYMBOL(snd_interval_refine);
+
static int snd_interval_refine_first(struct snd_interval *i)
{
- assert(!snd_interval_empty(i));
+ snd_assert(!snd_interval_empty(i), return -EINVAL);
if (snd_interval_single(i))
return 0;
i->max = i->min;
static int snd_interval_refine_last(struct snd_interval *i)
{
- assert(!snd_interval_empty(i));
+ snd_assert(!snd_interval_empty(i), return -EINVAL);
if (snd_interval_single(i))
return 0;
i->min = i->max;
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) {
c->integer = 0;
}
-#undef assert
/* ---- */
return err;
}
+EXPORT_SYMBOL(snd_interval_ratnum);
+
/**
* snd_interval_ratden - refine the interval value
* @i: interval to refine
{
unsigned int k;
int changed = 0;
+
+ if (!count) {
+ i->empty = 1;
+ return -EINVAL;
+ }
for (k = 0; k < count; k++) {
if (mask && !(mask & (1 << k)))
continue;
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;
return 0;
}
+EXPORT_SYMBOL(snd_pcm_hw_rule_add);
+
/**
* snd_pcm_hw_constraint_mask
* @runtime: PCM runtime instance
return snd_interval_setinteger(constrs_interval(constrs, var));
}
+EXPORT_SYMBOL(snd_pcm_hw_constraint_integer);
+
/**
* snd_pcm_hw_constraint_minmax
* @runtime: PCM runtime instance
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)
{
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)
{
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)
{
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)
{
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)
{
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[] = {
+ static unsigned int pow2_sizes[] = {
1<<0, 1<<1, 1<<2, 1<<3, 1<<4, 1<<5, 1<<6, 1<<7,
1<<8, 1<<9, 1<<10, 1<<11, 1<<12, 1<<13, 1<<14, 1<<15,
1<<16, 1<<17, 1<<18, 1<<19, 1<<20, 1<<21, 1<<22, 1<<23,
var, -1);
}
-/* 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
+EXPORT_SYMBOL(snd_pcm_hw_constraint_pow2);
static void _snd_pcm_hw_param_any(struct snd_pcm_hw_params *params,
snd_pcm_hw_param_t var)
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;
params->info = ~0U;
}
-#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 */
+EXPORT_SYMBOL(_snd_pcm_hw_params_any);
/**
* snd_pcm_hw_param_value
* Return the value for field PAR if it's fixed in configuration space
* defined by PARAMS. Return -EINVAL otherwise
*/
-static int snd_pcm_hw_param_value(const struct snd_pcm_hw_params *params,
- snd_pcm_hw_param_t var, int *dir)
+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);
*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;
-}
-
-/**
- * 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;
-}
+EXPORT_SYMBOL(snd_pcm_hw_param_value);
void _snd_pcm_hw_param_setempty(struct snd_pcm_hw_params *params,
snd_pcm_hw_param_t var)
}
}
-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 */
+EXPORT_SYMBOL(_snd_pcm_hw_param_setempty);
static int _snd_pcm_hw_param_first(struct snd_pcm_hw_params *params,
snd_pcm_hw_param_t var)
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 {
- assert(0);
+ else
return -EINVAL;
- }
if (changed) {
params->cmask |= 1 << var;
params->rmask |= 1 << var;
* values > minimum. Reduce configuration space accordingly.
* Return the minimum.
*/
-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 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);
- assert(err >= 0);
+ snd_assert(err >= 0, return err);
}
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)
{
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 {
- assert(0);
+ else
return -EINVAL;
- }
if (changed) {
params->cmask |= 1 << var;
params->rmask |= 1 << var;
* values < maximum. Reduce configuration space accordingly.
* Return the maximum.
*/
-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 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);
- assert(err >= 0);
+ snd_assert(err >= 0, return err);
}
return snd_pcm_hw_param_value(params, var, dir);
}
-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;
-}
+EXPORT_SYMBOL(snd_pcm_hw_param_last);
/**
* snd_pcm_hw_param_choose
* 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)
-{
- 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);
+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;
+ 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)
{
return -ENXIO;
}
-/*
- * Conditions
- */
-
-static void snd_pcm_system_tick_set(struct snd_pcm_substream *substream,
- unsigned long ticks)
-{
- struct snd_pcm_runtime *runtime = substream->runtime;
- if (ticks == 0)
- del_timer(&runtime->tick_timer);
- else {
- ticks += (1000000 / HZ) - 1;
- ticks /= (1000000 / HZ);
- mod_timer(&runtime->tick_timer, jiffies + ticks);
- }
-}
-
-/* Temporary alias */
-void snd_pcm_tick_set(struct snd_pcm_substream *substream, unsigned long ticks)
-{
- snd_pcm_system_tick_set(substream, ticks);
-}
-
-void snd_pcm_tick_prepare(struct snd_pcm_substream *substream)
-{
- struct snd_pcm_runtime *runtime = substream->runtime;
- snd_pcm_uframes_t frames = ULONG_MAX;
- snd_pcm_uframes_t avail, dist;
- unsigned int ticks;
- u_int64_t n;
- u_int32_t r;
- if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
- if (runtime->silence_size >= runtime->boundary) {
- frames = 1;
- } else if (runtime->silence_size > 0 &&
- runtime->silence_filled < runtime->buffer_size) {
- snd_pcm_sframes_t noise_dist;
- noise_dist = snd_pcm_playback_hw_avail(runtime) + runtime->silence_filled;
- if (noise_dist > (snd_pcm_sframes_t)runtime->silence_threshold)
- frames = noise_dist - runtime->silence_threshold;
- }
- avail = snd_pcm_playback_avail(runtime);
- } else {
- avail = snd_pcm_capture_avail(runtime);
- }
- if (avail < runtime->control->avail_min) {
- snd_pcm_sframes_t n = runtime->control->avail_min - avail;
- if (n > 0 && frames > (snd_pcm_uframes_t)n)
- frames = n;
- }
- if (avail < runtime->buffer_size) {
- snd_pcm_sframes_t n = runtime->buffer_size - avail;
- if (n > 0 && frames > (snd_pcm_uframes_t)n)
- frames = n;
- }
- if (frames == ULONG_MAX) {
- snd_pcm_tick_set(substream, 0);
- return;
- }
- dist = runtime->status->hw_ptr - runtime->hw_ptr_base;
- /* Distance to next interrupt */
- dist = runtime->period_size - dist % runtime->period_size;
- if (dist <= frames) {
- snd_pcm_tick_set(substream, 0);
- return;
- }
- /* the base time is us */
- n = frames;
- n *= 1000000;
- div64_32(&n, runtime->tick_time * runtime->rate, &r);
- ticks = n + (r > 0 ? 1 : 0);
- if (ticks < runtime->sleep_min)
- ticks = runtime->sleep_min;
- snd_pcm_tick_set(substream, (unsigned long) ticks);
-}
-
-void snd_pcm_tick_elapsed(struct snd_pcm_substream *substream)
-{
- struct snd_pcm_runtime *runtime;
- unsigned long flags;
-
- snd_assert(substream != NULL, return);
- runtime = substream->runtime;
- snd_assert(runtime != NULL, return);
-
- snd_pcm_stream_lock_irqsave(substream, flags);
- if (!snd_pcm_running(substream) ||
- snd_pcm_update_hw_ptr(substream) < 0)
- goto _end;
- if (runtime->sleep_min)
- snd_pcm_tick_prepare(substream);
- _end:
- snd_pcm_stream_unlock_irqrestore(substream, flags);
-}
+EXPORT_SYMBOL(snd_pcm_lib_ioctl);
/**
* snd_pcm_period_elapsed - update the pcm status for the next period
*
* This function is called from the interrupt handler when the
* PCM has processed the period size. It will update the current
- * pointer, set up the tick, wake up sleepers, etc.
+ * pointer, wake up sleepers, etc.
*
* Even if more than one periods have elapsed since the last call, you
* have to call this only once.
if (substream->timer_running)
snd_timer_interrupt(substream->timer, 1);
- if (runtime->sleep_min)
- snd_pcm_tick_prepare(substream);
_end:
snd_pcm_stream_unlock_irqrestore(substream, flags);
if (runtime->transfer_ack_end)
kill_fasync(&runtime->fasync, SIGIO, POLL_IN);
}
+EXPORT_SYMBOL(snd_pcm_period_elapsed);
+
+/*
+ * Wait until avail_min data becomes available
+ * Returns a negative error code if any error occurs during operation.
+ * The available space is stored on availp. When err = 0 and avail = 0
+ * on the capture stream, it indicates the stream is in DRAINING state.
+ */
+static int wait_for_avail_min(struct snd_pcm_substream *substream,
+ snd_pcm_uframes_t *availp)
+{
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ int is_playback = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
+ wait_queue_t wait;
+ int err = 0;
+ snd_pcm_uframes_t avail = 0;
+ long tout;
+
+ init_waitqueue_entry(&wait, current);
+ add_wait_queue(&runtime->sleep, &wait);
+ for (;;) {
+ if (signal_pending(current)) {
+ err = -ERESTARTSYS;
+ break;
+ }
+ set_current_state(TASK_INTERRUPTIBLE);
+ snd_pcm_stream_unlock_irq(substream);
+ tout = schedule_timeout(msecs_to_jiffies(10000));
+ snd_pcm_stream_lock_irq(substream);
+ switch (runtime->status->state) {
+ case SNDRV_PCM_STATE_SUSPENDED:
+ err = -ESTRPIPE;
+ goto _endloop;
+ case SNDRV_PCM_STATE_XRUN:
+ err = -EPIPE;
+ goto _endloop;
+ case SNDRV_PCM_STATE_DRAINING:
+ if (is_playback)
+ err = -EPIPE;
+ else
+ avail = 0; /* indicate draining */
+ goto _endloop;
+ case SNDRV_PCM_STATE_OPEN:
+ case SNDRV_PCM_STATE_SETUP:
+ case SNDRV_PCM_STATE_DISCONNECTED:
+ err = -EBADFD;
+ goto _endloop;
+ }
+ if (!tout) {
+ snd_printd("%s write error (DMA or IRQ trouble?)\n",
+ is_playback ? "playback" : "capture");
+ err = -EIO;
+ break;
+ }
+ if (is_playback)
+ avail = snd_pcm_playback_avail(runtime);
+ else
+ avail = snd_pcm_capture_avail(runtime);
+ if (avail >= runtime->control->avail_min)
+ break;
+ }
+ _endloop:
+ remove_wait_queue(&runtime->sleep, &wait);
+ *availp = avail;
+ return err;
+}
+
static int snd_pcm_lib_write_transfer(struct snd_pcm_substream *substream,
unsigned int hwoff,
unsigned long data, unsigned int off,
if (size == 0)
return 0;
- if (size > runtime->xfer_align)
- size -= size % runtime->xfer_align;
snd_pcm_stream_lock_irq(substream);
switch (runtime->status->state) {
snd_pcm_uframes_t frames, appl_ptr, appl_ofs;
snd_pcm_uframes_t avail;
snd_pcm_uframes_t cont;
- if (runtime->sleep_min == 0 && runtime->status->state == SNDRV_PCM_STATE_RUNNING)
+ if (runtime->status->state == SNDRV_PCM_STATE_RUNNING)
snd_pcm_update_hw_ptr(substream);
avail = snd_pcm_playback_avail(runtime);
- if (((avail < runtime->control->avail_min && size > avail) ||
- (size >= runtime->xfer_align && avail < runtime->xfer_align))) {
- wait_queue_t wait;
- enum { READY, SIGNALED, ERROR, SUSPENDED, EXPIRED, DROPPED } state;
- long tout;
-
+ if (!avail) {
if (nonblock) {
err = -EAGAIN;
goto _end_unlock;
}
-
- init_waitqueue_entry(&wait, current);
- add_wait_queue(&runtime->sleep, &wait);
- while (1) {
- if (signal_pending(current)) {
- state = SIGNALED;
- break;
- }
- set_current_state(TASK_INTERRUPTIBLE);
- snd_pcm_stream_unlock_irq(substream);
- tout = schedule_timeout(10 * HZ);
- snd_pcm_stream_lock_irq(substream);
- if (tout == 0) {
- if (runtime->status->state != SNDRV_PCM_STATE_PREPARED &&
- runtime->status->state != SNDRV_PCM_STATE_PAUSED) {
- state = runtime->status->state == SNDRV_PCM_STATE_SUSPENDED ? SUSPENDED : EXPIRED;
- break;
- }
- }
- switch (runtime->status->state) {
- case SNDRV_PCM_STATE_XRUN:
- case SNDRV_PCM_STATE_DRAINING:
- state = ERROR;
- goto _end_loop;
- case SNDRV_PCM_STATE_SUSPENDED:
- state = SUSPENDED;
- goto _end_loop;
- case SNDRV_PCM_STATE_SETUP:
- state = DROPPED;
- goto _end_loop;
- default:
- break;
- }
- avail = snd_pcm_playback_avail(runtime);
- if (avail >= runtime->control->avail_min) {
- state = READY;
- break;
- }
- }
- _end_loop:
- remove_wait_queue(&runtime->sleep, &wait);
-
- switch (state) {
- case ERROR:
- err = -EPIPE;
- goto _end_unlock;
- case SUSPENDED:
- err = -ESTRPIPE;
- goto _end_unlock;
- case SIGNALED:
- err = -ERESTARTSYS;
- goto _end_unlock;
- case EXPIRED:
- snd_printd("playback write error (DMA or IRQ trouble?)\n");
- err = -EIO;
- goto _end_unlock;
- case DROPPED:
- err = -EBADFD;
+ err = wait_for_avail_min(substream, &avail);
+ if (err < 0)
goto _end_unlock;
- default:
- break;
- }
}
- if (avail > runtime->xfer_align)
- avail -= avail % runtime->xfer_align;
frames = size > avail ? avail : size;
cont = runtime->buffer_size - runtime->control->appl_ptr % runtime->buffer_size;
if (frames > cont)
if (err < 0)
goto _end_unlock;
}
- if (runtime->sleep_min &&
- runtime->status->state == SNDRV_PCM_STATE_RUNNING)
- snd_pcm_tick_prepare(substream);
}
_end_unlock:
snd_pcm_stream_unlock_irq(substream);
if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
return -EBADFD;
- snd_assert(substream->ffile != NULL, return -ENXIO);
- nonblock = !!(substream->ffile->f_flags & O_NONBLOCK);
-#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
- if (substream->oss.oss) {
- struct snd_pcm_oss_setup *setup = substream->oss.setup;
- if (setup != NULL) {
- if (setup->nonblock)
- nonblock = 1;
- else if (setup->block)
- nonblock = 0;
- }
- }
-#endif
+ nonblock = !!(substream->f_flags & O_NONBLOCK);
if (runtime->access != SNDRV_PCM_ACCESS_RW_INTERLEAVED &&
runtime->channels > 1)
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,
if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
return -EBADFD;
- snd_assert(substream->ffile != NULL, return -ENXIO);
- nonblock = !!(substream->ffile->f_flags & O_NONBLOCK);
-#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
- if (substream->oss.oss) {
- struct snd_pcm_oss_setup *setup = substream->oss.setup;
- if (setup != NULL) {
- if (setup->nonblock)
- nonblock = 1;
- else if (setup->block)
- nonblock = 0;
- }
- }
-#endif
+ nonblock = !!(substream->f_flags & O_NONBLOCK);
if (runtime->access != SNDRV_PCM_ACCESS_RW_NONINTERLEAVED)
return -EINVAL;
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,
if (size == 0)
return 0;
- if (size > runtime->xfer_align)
- size -= size % runtime->xfer_align;
snd_pcm_stream_lock_irq(substream);
switch (runtime->status->state) {
snd_pcm_uframes_t frames, appl_ptr, appl_ofs;
snd_pcm_uframes_t avail;
snd_pcm_uframes_t cont;
- if (runtime->sleep_min == 0 && runtime->status->state == SNDRV_PCM_STATE_RUNNING)
+ if (runtime->status->state == SNDRV_PCM_STATE_RUNNING)
snd_pcm_update_hw_ptr(substream);
- __draining:
avail = snd_pcm_capture_avail(runtime);
- if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
- if (avail < runtime->xfer_align) {
- err = -EPIPE;
+ if (!avail) {
+ if (runtime->status->state ==
+ SNDRV_PCM_STATE_DRAINING) {
+ snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
goto _end_unlock;
}
- } else if ((avail < runtime->control->avail_min && size > avail) ||
- (size >= runtime->xfer_align && avail < runtime->xfer_align)) {
- wait_queue_t wait;
- enum { READY, SIGNALED, ERROR, SUSPENDED, EXPIRED, DROPPED } state;
- long tout;
-
if (nonblock) {
err = -EAGAIN;
goto _end_unlock;
}
-
- init_waitqueue_entry(&wait, current);
- add_wait_queue(&runtime->sleep, &wait);
- while (1) {
- if (signal_pending(current)) {
- state = SIGNALED;
- break;
- }
- set_current_state(TASK_INTERRUPTIBLE);
- snd_pcm_stream_unlock_irq(substream);
- tout = schedule_timeout(10 * HZ);
- snd_pcm_stream_lock_irq(substream);
- if (tout == 0) {
- if (runtime->status->state != SNDRV_PCM_STATE_PREPARED &&
- runtime->status->state != SNDRV_PCM_STATE_PAUSED) {
- state = runtime->status->state == SNDRV_PCM_STATE_SUSPENDED ? SUSPENDED : EXPIRED;
- break;
- }
- }
- switch (runtime->status->state) {
- case SNDRV_PCM_STATE_XRUN:
- state = ERROR;
- goto _end_loop;
- case SNDRV_PCM_STATE_SUSPENDED:
- state = SUSPENDED;
- goto _end_loop;
- case SNDRV_PCM_STATE_DRAINING:
- goto __draining;
- case SNDRV_PCM_STATE_SETUP:
- state = DROPPED;
- goto _end_loop;
- default:
- break;
- }
- avail = snd_pcm_capture_avail(runtime);
- if (avail >= runtime->control->avail_min) {
- state = READY;
- break;
- }
- }
- _end_loop:
- remove_wait_queue(&runtime->sleep, &wait);
-
- switch (state) {
- case ERROR:
- err = -EPIPE;
- goto _end_unlock;
- case SUSPENDED:
- err = -ESTRPIPE;
- goto _end_unlock;
- case SIGNALED:
- err = -ERESTARTSYS;
- goto _end_unlock;
- case EXPIRED:
- snd_printd("capture read error (DMA or IRQ trouble?)\n");
- err = -EIO;
- goto _end_unlock;
- case DROPPED:
- err = -EBADFD;
+ err = wait_for_avail_min(substream, &avail);
+ if (err < 0)
goto _end_unlock;
- default:
- break;
- }
+ if (!avail)
+ continue; /* draining */
}
- if (avail > runtime->xfer_align)
- avail -= avail % runtime->xfer_align;
frames = size > avail ? avail : size;
cont = runtime->buffer_size - runtime->control->appl_ptr % runtime->buffer_size;
if (frames > cont)
offset += frames;
size -= frames;
xfer += frames;
- if (runtime->sleep_min &&
- runtime->status->state == SNDRV_PCM_STATE_RUNNING)
- snd_pcm_tick_prepare(substream);
}
_end_unlock:
snd_pcm_stream_unlock_irq(substream);
if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
return -EBADFD;
- snd_assert(substream->ffile != NULL, return -ENXIO);
- nonblock = !!(substream->ffile->f_flags & O_NONBLOCK);
-#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
- if (substream->oss.oss) {
- struct snd_pcm_oss_setup *setup = substream->oss.setup;
- if (setup != NULL) {
- if (setup->nonblock)
- nonblock = 1;
- else if (setup->block)
- nonblock = 0;
- }
- }
-#endif
+ nonblock = !!(substream->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,
if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
return -EBADFD;
- snd_assert(substream->ffile != NULL, return -ENXIO);
- nonblock = !!(substream->ffile->f_flags & O_NONBLOCK);
-#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
- if (substream->oss.oss) {
- struct snd_pcm_oss_setup *setup = substream->oss.setup;
- if (setup != NULL) {
- if (setup->nonblock)
- nonblock = 1;
- else if (setup->block)
- nonblock = 0;
- }
- }
-#endif
-
+ nonblock = !!(substream->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);
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff