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| author | Eric Wong <normalperson@yhbt.net> | 2008-09-07 21:15:44 -0700 |
|---|---|---|
| committer | Eric Wong <normalperson@yhbt.net> | 2008-09-07 22:25:01 -0700 |
| commit | ef90b504e87ced9cdd969963915dc712ac8b416b (patch) | |
| tree | 06065ba80dc6774e40bc8028cfdb3e0538979c68 | |
| parent | 8508a377bebafadb56b2666b55d2caf2b04ed875 (diff) | |
| download | mpd-ef90b504e87ced9cdd969963915dc712ac8b416b.tar.gz mpd-ef90b504e87ced9cdd969963915dc712ac8b416b.tar.xz mpd-ef90b504e87ced9cdd969963915dc712ac8b416b.zip | |
alsa: avoid unnecessary heap usage if we don't set a device name
| -rw-r--r-- | src/audioOutputs/audioOutput_alsa.c | 23 |
1 files changed, 12 insertions, 11 deletions
diff --git a/src/audioOutputs/audioOutput_alsa.c b/src/audioOutputs/audioOutput_alsa.c index 2b50cf618..3fe8af080 100644 --- a/src/audioOutputs/audioOutput_alsa.c +++ b/src/audioOutputs/audioOutput_alsa.c @@ -23,6 +23,8 @@ #define ALSA_PCM_NEW_HW_PARAMS_API #define ALSA_PCM_NEW_SW_PARAMS_API +static const char default_device[] = "default"; + #define MPD_ALSA_BUFFER_TIME_US 500000 /* the default period time of xmms is 50 ms, so let's use that as well. * a user can tweak this parameter via the "period_time" config parameter. @@ -55,7 +57,7 @@ typedef snd_pcm_sframes_t alsa_writei_t(snd_pcm_t * pcm, const void *buffer, snd_pcm_uframes_t size); typedef struct _AlsaData { - char *device; + const char *device; snd_pcm_t *pcmHandle; alsa_writei_t *writei; unsigned int buffer_time; @@ -68,7 +70,7 @@ static AlsaData *newAlsaData(void) { AlsaData *ret = xmalloc(sizeof(AlsaData)); - ret->device = NULL; + ret->device = default_device; ret->pcmHandle = NULL; ret->writei = snd_pcm_writei; ret->useMmap = 0; @@ -80,9 +82,8 @@ static AlsaData *newAlsaData(void) static void freeAlsaData(AlsaData * ad) { - if (ad->device) - free(ad->device); - + if (ad->device && ad->device != default_device) + free(deconst_ptr(ad->device)); free(ad); } @@ -91,9 +92,10 @@ static int alsa_initDriver(AudioOutput * audioOutput, ConfigParam * param) AlsaData *ad = newAlsaData(); if (param) { - BlockParam *bp = getBlockParam(param, "device"); - ad->device = bp ? xstrdup(bp->value) : xstrdup("default"); + BlockParam *bp; + if ((bp = getBlockParam(param, "device"))) + ad->device = xstrdup(bp->value); ad->useMmap = getBoolBlockParam(param, "use_mmap", 1); if (ad->useMmap == CONF_BOOL_UNSET) ad->useMmap = 0; @@ -101,8 +103,7 @@ static int alsa_initDriver(AudioOutput * audioOutput, ConfigParam * param) ad->buffer_time = atoi(bp->value); if ((bp = getBlockParam(param, "period_time"))) ad->period_time = atoi(bp->value); - } else - ad->device = xstrdup("default"); + } audioOutput->data = ad; return 0; @@ -119,8 +120,8 @@ static int alsa_testDefault(void) { snd_pcm_t *handle; - int ret = snd_pcm_open(&handle, "default", SND_PCM_STREAM_PLAYBACK, - SND_PCM_NONBLOCK); + int ret = snd_pcm_open(&handle, default_device, + SND_PCM_STREAM_PLAYBACK, SND_PCM_NONBLOCK); snd_config_update_free_global(); if (ret) { |