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kits/media: CPU clock speed may vary significantly

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This commit is contained in:
Pawel Dziepak 2013-12-12 03:00:18 +01:00
parent fa15750925
commit 4c125ccacd
1 changed files with 3 additions and 18 deletions
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21
src/kits/media/MediaRoster.cpp
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@ -3112,25 +3112,10 @@ BMediaRoster::AudioBufferSizeFor(int32 channelCount, uint32 sampleFormat,
bigtime_t bufferDuration; bigtime_t bufferDuration;
ssize_t bufferSize; ssize_t bufferSize;
system_info info; if (busKind == B_ISA_BUS || busKind == B_PCMCIA_BUS)
get_system_info(&info);
if (info.cpu_clock_speed > 2000000000) // 2 GHz
bufferDuration = 2500;
else if (info.cpu_clock_speed > 1000000000)
bufferDuration = 5000;
else if (info.cpu_clock_speed > 600000000)
bufferDuration = 10000;
else if (info.cpu_clock_speed > 200000000)
bufferDuration = 20000;
else if (info.cpu_clock_speed > 100000000)
bufferDuration = 30000;
else
bufferDuration = 50000;
if ((busKind == B_ISA_BUS || busKind == B_PCMCIA_BUS)
&& bufferDuration < 25000)
bufferDuration = 25000; bufferDuration = 25000;
else
bufferDuration = 10000;
bufferSize = (sampleFormat & 0xf) * channelCount bufferSize = (sampleFormat & 0xf) * channelCount
* (ssize_t)((frameRate * bufferDuration) / 1000000.0); * (ssize_t)((frameRate * bufferDuration) / 1000000.0);