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ao_sdl: make sure our buffer is always larger than what SDL requests

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Assume obtained.samples contains the number of samples the SDL audio
callback will request at once. Then make sure ao.c will set the buffer
size at least to 3 times that value (or more).

Might help with bad SDL audio backends like ESD, which supposedly uses a
500ms buffer.
This commit is contained in:
wm4 2014-03-10 21:30:40 +01:00
parent b0b0e69570
commit 7221d96ba3
1 changed files with 6 additions and 0 deletions
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6
audio/out/ao_sdl.c
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@ -150,6 +150,12 @@ static int init(struct ao *ao)
(int) obtained.freq, (int) obtained.channels,
(int) obtained.format, (int) obtained.samples);
// The sample count is usually the number of samples the callback requests,
// which we assume is the period size. Normally, ao.c will allocate a large
// enough buffer. But in case the period size should be pathologically
// large, this will help.
ao->device_buffer = 3 * obtained.samples;
switch (obtained.format) {
case AUDIO_U8: ao->format = AF_FORMAT_U8; break;
case AUDIO_S8: ao->format = AF_FORMAT_S8; break;