-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(snd_pcm_t *pcm, snd_pcm_hw_params_t *params,
- snd_pcm_hw_param_t var, unsigned int best, int *dir)
-{
- snd_pcm_hw_params_t *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) {
- snd_pcm_hw_params_t *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
- * @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:
- * 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(snd_pcm_t *pcm, snd_pcm_hw_params_t *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);
-
- return 0;
-}
-
-#undef snd_pcm_t
-#undef assert
-
-static int snd_pcm_lib_ioctl_reset(snd_pcm_substream_t *substream,