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Backend API to query rates&sizes for separate I/O.

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This commit is contained in:
Robin Gareus 2015-08-11 12:50:05 +02:00
parent 22acbc1cee
commit 1d3690d845
1 changed files with 27 additions and 0 deletions
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27
libs/ardour/ardour/audio_backend.h
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@ -191,6 +191,20 @@ class LIBARDOUR_API AudioBackend : public PortEngine {
*/ */
virtual std::vector<float> available_sample_rates (const std::string& device) const = 0; virtual std::vector<float> available_sample_rates (const std::string& device) const = 0;
/* backends that support separate input and output devices should
* implement this function and return an intersection (not union) of available
* sample rates valid for the given input + output device combination.
*/
virtual std::vector<float> available_sample_rates (const std::string& input_device, const std::string& output_device) const {
std::vector<float> input_sizes = available_sample_rates (input_device);
std::vector<float> output_sizes = available_sample_rates (output_device);
std::vector<float> rv;
std::set_union (input_sizes.begin (), input_sizes.end (),
output_sizes.begin (), output_sizes.end (),
std::back_inserter (rv));
return rv;
}
/* Returns the default sample rate that will be shown to the user when /* Returns the default sample rate that will be shown to the user when
* configuration options are first presented. If the derived class * configuration options are first presented. If the derived class
* needs or wants to override this, it can. It also MUST override this * needs or wants to override this, it can. It also MUST override this
@ -210,6 +224,19 @@ class LIBARDOUR_API AudioBackend : public PortEngine {
*/ */
virtual std::vector<uint32_t> available_buffer_sizes (const std::string& device) const = 0; virtual std::vector<uint32_t> available_buffer_sizes (const std::string& device) const = 0;
/* backends that support separate input and output devices should
* implement this function and return an intersection (not union) of available
* buffer sizes valid for the given input + output device combination.
*/
virtual std::vector<uint32_t> available_buffer_sizes (const std::string& input_device, const std::string& output_device) const {
std::vector<uint32_t> input_rates = available_buffer_sizes (input_device);
std::vector<uint32_t> output_rates = available_buffer_sizes (output_device);
std::vector<uint32_t> rv;
std::set_union (input_rates.begin (), input_rates.end (),
output_rates.begin (), output_rates.end (),
std::back_inserter (rv));
return rv;
}
/* Returns the default buffer size that will be shown to the user when /* Returns the default buffer size that will be shown to the user when
* configuration options are first presented. If the derived class * configuration options are first presented. If the derived class
* needs or wants to override this, it can. It also MUST override this * needs or wants to override this, it can. It also MUST override this