[ALSA] Clean up ugly hacks in pcm_lib.c

Clean up ugly hacks for sync with alsa-lib code in pcm_lib.c.
Also, optimize snd_pcm_hw_params_choose() with a loop.

Signed-off-by: Takashi Iwai <tiwai@suse.de>

diff --git a/sound/core/pcm_lib.c b/sound/core/pcm_lib.c
index 786f881..a21aa00 100644 (file)
--- a/sound/core/pcm_lib.c
+++ b/sound/core/pcm_lib.c
@@ -1163,12 +1163,6 @@ int snd_pcm_hw_constraint_pow2(struct snd_pcm_runtime *runtime,
 
 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)
 {
@@ -1228,7 +1222,6 @@ 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;
 }
 
@@ -1260,10 +1253,8 @@ 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 {
-               assert(0);
+       else
                return -EINVAL;
-       }
        if (changed) {
                params->cmask |= 1 << var;
                params->rmask |= 1 << var;
@@ -1292,7 +1283,7 @@ int snd_pcm_hw_param_first(struct snd_pcm_substream *pcm,
                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);
 }
@@ -1307,10 +1298,8 @@ 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 {
-               assert(0);
+       else
                return -EINVAL;
-       }
        if (changed) {
                params->cmask |= 1 << var;
                params->rmask |= 1 << var;
@@ -1339,7 +1328,7 @@ int snd_pcm_hw_param_last(struct snd_pcm_substream *pcm,
                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);
 }
@@ -1356,39 +1345,32 @@ 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)
-{
-       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)
 {