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audio: preallocate audio buffers on resize

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This avoids too many realloc() calls if the caller is appending to an
audo buffer. This case is actually quite noticeable when using something
that buffers a large amount of audio.
This commit is contained in:
wm4 2014-04-18 16:19:46 +02:00
parent 8931bc46ba
commit 5616229dde
1 changed files with 7 additions and 2 deletions
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9
audio/audio.c
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@ -173,10 +173,15 @@ void mp_audio_realloc(struct mp_audio *mpa, int samples)
}
// Like mp_audio_realloc(), but only reallocate if the audio grows in size.
// If the buffer is reallocated, also preallocate.
void mp_audio_realloc_min(struct mp_audio *mpa, int samples)
{
if (samples > mp_audio_get_allocated_size(mpa))
mp_audio_realloc(mpa, samples);
if (samples > mp_audio_get_allocated_size(mpa)) {
size_t alloc = ta_calc_prealloc_elems(samples);
if (alloc > INT_MAX)
abort(); // oom
mp_audio_realloc(mpa, alloc);
}
}
/* Get the size allocated for the data, in number of samples. If the allocated