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a/src/alsadirect.cpp |
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b/src/alsadirect.cpp |
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/* This is used to disable sample rate conversion until playing is actually
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/* This is used to disable sample rate conversion until playing is actually
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started */
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started */
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static bool qinit = false;
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static bool qinit = false;
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static snd_pcm_t *pcm;
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static snd_pcm_t *pcm;
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// A period is data processed between interrupts. When playing,
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// there is one period belonging to the hardware and normally
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// others that the software can fill up. The minimum reasonable is
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// 2 periods (one for us, one for the hardware), which we try to
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// use as this gives minimum latency while being workable. But we
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// have to accept that the driver may have other constraints. Not
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// too sure why we bother actually, because we don't use the
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// resulting config at all while writing...
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// In any case, if we get what we ask for, we have an in-driver
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// latency of between 16KBytes and 32KBytes, 4K to 8K frames (16:2),
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// 200mS at 44.1 Khz
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//
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| 66 |
/* These may be changed depending on local alsa caps */
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// These may be changed depending on local alsa caps:
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static snd_pcm_uframes_t periodsize = 16384; /* Periodsize (bytes) */
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static snd_pcm_uframes_t periodsize = 16384; /* Periodsize (bytes) */
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static unsigned int periods = 2; /* Number of periods */
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static unsigned int periods = 2; /* Number of periods */
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static void *alsawriter(void *p)
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static void *alsawriter(void *p)
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{
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{
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