diff options
Diffstat (limited to 'sound/core/pcm_lib.c')
| -rw-r--r-- | sound/core/pcm_lib.c | 137 |
1 files changed, 129 insertions, 8 deletions
diff --git a/sound/core/pcm_lib.c b/sound/core/pcm_lib.c index c5bfd0918cff..0503980c23d9 100644 --- a/sound/core/pcm_lib.c +++ b/sound/core/pcm_lib.c @@ -524,6 +524,9 @@ void snd_interval_mul(const snd_interval_t *a, const snd_interval_t *b, snd_inte /** * snd_interval_div - refine the interval value with division + * @a: dividend + * @b: divisor + * @c: quotient * * c = a / b * @@ -555,7 +558,11 @@ void snd_interval_div(const snd_interval_t *a, const snd_interval_t *b, snd_inte /** * snd_interval_muldivk - refine the interval value - * + * @a: dividend 1 + * @b: dividend 2 + * @k: divisor (as integer) + * @c: result + * * c = a * b / k * * Returns non-zero if the value is changed, zero if not changed. @@ -582,6 +589,10 @@ void snd_interval_muldivk(const snd_interval_t *a, const snd_interval_t *b, /** * snd_interval_mulkdiv - refine the interval value + * @a: dividend 1 + * @k: dividend 2 (as integer) + * @b: divisor + * @c: result * * c = a * k / b * @@ -618,6 +629,11 @@ void snd_interval_mulkdiv(const snd_interval_t *a, unsigned int k, /** * snd_interval_ratnum - refine the interval value + * @i: interval to refine + * @rats_count: number of ratnum_t + * @rats: ratnum_t array + * @nump: pointer to store the resultant numerator + * @denp: pointer to store the resultant denominator * * Returns non-zero if the value is changed, zero if not changed. */ @@ -715,6 +731,11 @@ int snd_interval_ratnum(snd_interval_t *i, /** * snd_interval_ratden - refine the interval value + * @i: interval to refine + * @rats_count: number of ratden_t + * @rats: ratden_t array + * @nump: pointer to store the resultant numerator + * @denp: pointer to store the resultant denominator * * Returns non-zero if the value is changed, zero if not changed. */ @@ -936,6 +957,11 @@ int snd_pcm_hw_rule_add(snd_pcm_runtime_t *runtime, unsigned int cond, /** * snd_pcm_hw_constraint_mask + * @runtime: PCM runtime instance + * @var: hw_params variable to apply the mask + * @mask: the bitmap mask + * + * Apply the constraint of the given bitmap mask to a mask parameter. */ int snd_pcm_hw_constraint_mask(snd_pcm_runtime_t *runtime, snd_pcm_hw_param_t var, u_int32_t mask) @@ -951,6 +977,11 @@ int snd_pcm_hw_constraint_mask(snd_pcm_runtime_t *runtime, snd_pcm_hw_param_t va /** * snd_pcm_hw_constraint_mask64 + * @runtime: PCM runtime instance + * @var: hw_params variable to apply the mask + * @mask: the 64bit bitmap mask + * + * Apply the constraint of the given bitmap mask to a mask parameter. */ int snd_pcm_hw_constraint_mask64(snd_pcm_runtime_t *runtime, snd_pcm_hw_param_t var, u_int64_t mask) @@ -967,6 +998,10 @@ int snd_pcm_hw_constraint_mask64(snd_pcm_runtime_t *runtime, snd_pcm_hw_param_t /** * snd_pcm_hw_constraint_integer + * @runtime: PCM runtime instance + * @var: hw_params variable to apply the integer constraint + * + * Apply the constraint of integer to an interval parameter. */ int snd_pcm_hw_constraint_integer(snd_pcm_runtime_t *runtime, snd_pcm_hw_param_t var) { @@ -976,6 +1011,12 @@ int snd_pcm_hw_constraint_integer(snd_pcm_runtime_t *runtime, snd_pcm_hw_param_t /** * snd_pcm_hw_constraint_minmax + * @runtime: PCM runtime instance + * @var: hw_params variable to apply the range + * @min: the minimal value + * @max: the maximal value + * + * Apply the min/max range constraint to an interval parameter. */ int snd_pcm_hw_constraint_minmax(snd_pcm_runtime_t *runtime, snd_pcm_hw_param_t var, unsigned int min, unsigned int max) @@ -999,6 +1040,12 @@ static int snd_pcm_hw_rule_list(snd_pcm_hw_params_t *params, /** * snd_pcm_hw_constraint_list + * @runtime: PCM runtime instance + * @cond: condition bits + * @var: hw_params variable to apply the list constraint + * @l: list + * + * Apply the list of constraints to an interval parameter. */ int snd_pcm_hw_constraint_list(snd_pcm_runtime_t *runtime, unsigned int cond, @@ -1027,6 +1074,10 @@ static int snd_pcm_hw_rule_ratnums(snd_pcm_hw_params_t *params, /** * snd_pcm_hw_constraint_ratnums + * @runtime: PCM runtime instance + * @cond: condition bits + * @var: hw_params variable to apply the ratnums constraint + * @r: ratnums_t constriants */ int snd_pcm_hw_constraint_ratnums(snd_pcm_runtime_t *runtime, unsigned int cond, @@ -1054,6 +1105,10 @@ static int snd_pcm_hw_rule_ratdens(snd_pcm_hw_params_t *params, /** * snd_pcm_hw_constraint_ratdens + * @runtime: PCM runtime instance + * @cond: condition bits + * @var: hw_params variable to apply the ratdens constraint + * @r: ratdens_t constriants */ int snd_pcm_hw_constraint_ratdens(snd_pcm_runtime_t *runtime, unsigned int cond, @@ -1079,6 +1134,10 @@ static int snd_pcm_hw_rule_msbits(snd_pcm_hw_params_t *params, /** * snd_pcm_hw_constraint_msbits + * @runtime: PCM runtime instance + * @cond: condition bits + * @width: sample bits width + * @msbits: msbits width */ int snd_pcm_hw_constraint_msbits(snd_pcm_runtime_t *runtime, unsigned int cond, @@ -1101,6 +1160,10 @@ static int snd_pcm_hw_rule_step(snd_pcm_hw_params_t *params, /** * snd_pcm_hw_constraint_step + * @runtime: PCM runtime instance + * @cond: condition bits + * @var: hw_params variable to apply the step constraint + * @step: step size */ int snd_pcm_hw_constraint_step(snd_pcm_runtime_t *runtime, unsigned int cond, @@ -1126,6 +1189,9 @@ static int snd_pcm_hw_rule_pow2(snd_pcm_hw_params_t *params, snd_pcm_hw_rule_t * /** * snd_pcm_hw_constraint_pow2 + * @runtime: PCM runtime instance + * @cond: condition bits + * @var: hw_params variable to apply the power-of-2 constraint */ int snd_pcm_hw_constraint_pow2(snd_pcm_runtime_t *runtime, unsigned int cond, @@ -1162,7 +1228,7 @@ static void _snd_pcm_hw_param_any(snd_pcm_hw_params_t *params, } #if 0 -/** +/* * snd_pcm_hw_param_any */ int snd_pcm_hw_param_any(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, @@ -1185,7 +1251,7 @@ void _snd_pcm_hw_params_any(snd_pcm_hw_params_t *params) } #if 0 -/** +/* * snd_pcm_hw_params_any * * Fill PARAMS with full configuration space boundaries @@ -1199,6 +1265,9 @@ int snd_pcm_hw_params_any(snd_pcm_t *pcm, snd_pcm_hw_params_t *params) /** * snd_pcm_hw_param_value + * @params: the hw_params instance + * @var: parameter to retrieve + * @dir: pointer to the direction (-1,0,1) or NULL * * Return the value for field PAR if it's fixed in configuration space * defined by PARAMS. Return -EINVAL otherwise @@ -1228,6 +1297,9 @@ static int snd_pcm_hw_param_value(const snd_pcm_hw_params_t *params, /** * 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. */ @@ -1251,6 +1323,9 @@ unsigned int snd_pcm_hw_param_value_min(const snd_pcm_hw_params_t *params, /** * 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. */ @@ -1302,7 +1377,7 @@ int _snd_pcm_hw_param_setinteger(snd_pcm_hw_params_t *params, } #if 0 -/** +/* * snd_pcm_hw_param_setinteger * * Inside configuration space defined by PARAMS remove from PAR all @@ -1347,6 +1422,10 @@ static int _snd_pcm_hw_param_first(snd_pcm_hw_params_t *params, /** * snd_pcm_hw_param_first + * @pcm: PCM instance + * @params: the hw_params instance + * @var: parameter to retrieve + * @dir: pointer to the direction (-1,0,1) or NULL * * Inside configuration space defined by PARAMS remove from PAR all * values > minimum. Reduce configuration space accordingly. @@ -1388,6 +1467,10 @@ static int _snd_pcm_hw_param_last(snd_pcm_hw_params_t *params, /** * snd_pcm_hw_param_last + * @pcm: PCM instance + * @params: the hw_params instance + * @var: parameter to retrieve + * @dir: pointer to the direction (-1,0,1) or NULL * * Inside configuration space defined by PARAMS remove from PAR all * values < maximum. Reduce configuration space accordingly. @@ -1439,6 +1522,11 @@ int _snd_pcm_hw_param_min(snd_pcm_hw_params_t *params, /** * 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. @@ -1494,6 +1582,11 @@ static int _snd_pcm_hw_param_max(snd_pcm_hw_params_t *params, /** * 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. @@ -1565,6 +1658,11 @@ int _snd_pcm_hw_param_set(snd_pcm_hw_params_t *params, /** * 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. @@ -1584,8 +1682,8 @@ int snd_pcm_hw_param_set(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, return snd_pcm_hw_param_value(params, var, NULL); } -int _snd_pcm_hw_param_mask(snd_pcm_hw_params_t *params, - snd_pcm_hw_param_t var, const snd_mask_t *val) +static int _snd_pcm_hw_param_mask(snd_pcm_hw_params_t *params, + snd_pcm_hw_param_t var, const snd_mask_t *val) { int changed; assert(hw_is_mask(var)); @@ -1599,6 +1697,10 @@ int _snd_pcm_hw_param_mask(snd_pcm_hw_params_t *params, /** * 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. @@ -1671,6 +1773,11 @@ static int boundary_nearer(int min, int mindir, /** * 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. @@ -1747,6 +1854,8 @@ int snd_pcm_hw_param_near(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, /** * snd_pcm_hw_param_choose + * @pcm: PCM instance + * @params: the hw_params instance * * Choose one configuration from configuration space defined by PARAMS * The configuration chosen is that obtained fixing in this order: @@ -2063,7 +2172,7 @@ static snd_pcm_sframes_t snd_pcm_lib_write1(snd_pcm_substream_t *substream, 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 } state; + enum { READY, SIGNALED, ERROR, SUSPENDED, EXPIRED, DROPPED } state; long tout; if (nonblock) { @@ -2097,6 +2206,9 @@ static snd_pcm_sframes_t snd_pcm_lib_write1(snd_pcm_substream_t *substream, case SNDRV_PCM_STATE_SUSPENDED: state = SUSPENDED; goto _end_loop; + case SNDRV_PCM_STATE_SETUP: + state = DROPPED; + goto _end_loop; default: break; } @@ -2123,6 +2235,9 @@ static snd_pcm_sframes_t snd_pcm_lib_write1(snd_pcm_substream_t *substream, snd_printd("playback write error (DMA or IRQ trouble?)\n"); err = -EIO; goto _end_unlock; + case DROPPED: + err = -EBADFD; + goto _end_unlock; default: break; } @@ -2359,7 +2474,7 @@ static snd_pcm_sframes_t snd_pcm_lib_read1(snd_pcm_substream_t *substream, } 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 } state; + enum { READY, SIGNALED, ERROR, SUSPENDED, EXPIRED, DROPPED } state; long tout; if (nonblock) { @@ -2394,6 +2509,9 @@ static snd_pcm_sframes_t snd_pcm_lib_read1(snd_pcm_substream_t *substream, goto _end_loop; case SNDRV_PCM_STATE_DRAINING: goto __draining; + case SNDRV_PCM_STATE_SETUP: + state = DROPPED; + goto _end_loop; default: break; } @@ -2420,6 +2538,9 @@ static snd_pcm_sframes_t snd_pcm_lib_read1(snd_pcm_substream_t *substream, snd_printd("capture read error (DMA or IRQ trouble?)\n"); err = -EIO; goto _end_unlock; + case DROPPED: + err = -EBADFD; + goto _end_unlock; default: break; } |