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make PlaybackBuffer<T>'s power-of-two size computation available to others

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This commit is contained in:
Paul Davis 2019-03-18 07:32:56 -07:00
parent 4706201425
commit b53d80a7d4
1 changed files with 7 additions and 5 deletions
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12
libs/pbd/pbd/playback_buffer.h
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@ -32,16 +32,18 @@ template<class T>
class /*LIBPBD_API*/ PlaybackBuffer class /*LIBPBD_API*/ PlaybackBuffer
{ {
public: public:
static guint power_of_two_size (guint sz) {
int32_t power_of_two;
for (power_of_two = 1; 1U << power_of_two < sz; ++power_of_two);
return 1U << power_of_two;
}
PlaybackBuffer (guint sz, guint res = 8191) PlaybackBuffer (guint sz, guint res = 8191)
: reservation (res) : reservation (res)
, _reservation_lock () , _reservation_lock ()
{ {
sz += reservation; sz += reservation;
size = power_of_two_size (sz);
int32_t power_of_two;
for (power_of_two = 1; 1U << power_of_two < sz; ++power_of_two);
size = 1U << power_of_two;
size_mask = size - 1; size_mask = size - 1;
buf = new T[size]; buf = new T[size];