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Add API to ARDOUR::AudioBackend to allow different input and output devices

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Used spaces instead of tabs for whitespace consistancy with rest of header
This commit is contained in:
Tim Mayberry 2015-05-09 11:35:27 +10:00 committed by Robin Gareus
parent 86f56de656
commit bb3b15ef96
1 changed files with 47 additions and 0 deletions
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47
libs/ardour/ardour/audio_backend.h
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@ -143,6 +143,16 @@ class LIBARDOUR_API AudioBackend : public PortEngine {
DeviceStatus (const std::string& s, bool avail) : name (s), available (avail) {}
};
/** An optional alternate interface for backends to provide a facility to
* select separate input and output devices.
*
* If a backend returns true then enumerate_input_devices() and
* enumerate_output_devices() will be used instead of enumerate_devices()
* to enumerate devices. Similarly set_input/output_device_name() should
* be used to set devices instead of set_device_name().
*/
virtual bool use_separate_input_and_output_devices () const { return false; }
/** Returns a collection of DeviceStatuses identifying devices discovered
* by this backend since the start of the process.
*
@ -152,6 +162,26 @@ class LIBARDOUR_API AudioBackend : public PortEngine {
*/
virtual std::vector<DeviceStatus> enumerate_devices () const = 0;
/** Returns a collection of DeviceStatuses identifying input devices
* discovered by this backend since the start of the process.
*
* Any of the names in each DeviceStatus may be used to identify a
* device in other calls to the backend, though any of them may become
* invalid at any time.
*/
virtual std::vector<DeviceStatus> enumerate_input_devices () const
{ return std::vector<DeviceStatus>(); }
/** Returns a collection of DeviceStatuses identifying output devices
* discovered by this backend since the start of the process.
*
* Any of the names in each DeviceStatus may be used to identify a
* device in other calls to the backend, though any of them may become
* invalid at any time.
*/
virtual std::vector<DeviceStatus> enumerate_output_devices () const
{ return std::vector<DeviceStatus>(); }
/** Returns a collection of float identifying sample rates that are
* potentially usable with the hardware identified by @param device.
* Any of these values may be supplied in other calls to this backend
@ -231,6 +261,21 @@ class LIBARDOUR_API AudioBackend : public PortEngine {
/** Set the name of the device to be used
*/
virtual int set_device_name (const std::string&) = 0;
/** Set the name of the input device to be used if using separate
* input/output devices.
*
* @see use_separate_input_and_output_devices()
*/
virtual int set_input_device_name (const std::string&) { return 0;}
/** Set the name of the output device to be used if using separate
* input/output devices.
*
* @see use_separate_input_and_output_devices()
*/
virtual int set_output_device_name (const std::string&) { return 0;}
/** Deinitialize and destroy current device
*/
virtual int drop_device() {return 0;};
@ -283,6 +328,8 @@ class LIBARDOUR_API AudioBackend : public PortEngine {
/* Retrieving parameters */
virtual std::string device_name () const = 0;
virtual std::string input_device_name () const { return std::string(); }
virtual std::string output_device_name () const { return std::string(); }
virtual float sample_rate () const = 0;
virtual uint32_t buffer_size () const = 0;
virtual bool interleaved () const = 0;