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#723132
+---------------+-----------------------------------------------------------------------------------+
| | : |
| <--fixed--> | <-- changeable buffer --------------------------------------------------------> |
| buffer | : |
+---------------+-----------------------------------------------------------------------------------+
^ ^ ^ ^
| Where the | The delay, i.e. | somewhere here we | here's where we enforce
| audio hw | where the changable buffer | have the goal | the maximum buffer size,
| read samples | is handed to the fixed buf | | considerably larger then the goal
Data is requested from the application only in blocks >= the reqsize, and also moved only in blocks >= the reqsize from the changeable buffer to the fixed buffer.