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add default sample rate and buffer size methods to AudioBackend

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This commit is contained in:
Paul Davis 2013-10-21 11:33:38 -04:00
parent 3e4b608724
commit 613fc12e73
1 changed files with 21 additions and 0 deletions
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21
libs/ardour/ardour/audio_backend.h
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@ -117,6 +117,17 @@ class AudioBackend : public PortEngine {
* at any time.
*/
virtual std::vector<float> available_sample_rates (const std::string& device) const = 0;
/* Returns the default sample rate that will be shown to the user when
* configuration options are first presented. If the derived class
* needs or wants to override this, it can. It also MUST override this
* if there is any chance that an SR of 44.1kHz is not in the list
* returned by available_sample_rates()
*/
virtual float default_sample_rate () const {
return 44100.0;
}
/** Returns a collection of uint32 identifying buffer sizes that are
* potentially usable with the hardware identified by @param device.
* Any of these values may be supplied in other calls to this backend
@ -126,6 +137,16 @@ class AudioBackend : public PortEngine {
*/
virtual std::vector<uint32_t> available_buffer_sizes (const std::string& device) const = 0;
/* Returns the default buffer size that will be shown to the user when
* configuration options are first presented. If the derived class
* needs or wants to override this, it can. It also MUST override this
* if there is any chance that a buffer size of 1024 is not in the list
* returned by available_buffer_sizes()
*/
virtual uint32_t default_buffer_size () const {
return 1024;
}
/** Returns the maximum number of input channels that are potentially
* usable with the hardware identified by @param device. Any number from 1
* to the value returned may be supplied in other calls to this backend as