diff options
Diffstat (limited to 'midimonster.h')
| -rw-r--r-- | midimonster.h | 37 |
1 files changed, 29 insertions, 8 deletions
diff --git a/midimonster.h b/midimonster.h index 1192d6a..5844bb9 100644 --- a/midimonster.h +++ b/midimonster.h @@ -5,6 +5,16 @@ #include <stdint.h> #include <inttypes.h> +/* Core version unless set by the build process */ +#ifndef MIDIMONSTER_VERSION + #define MIDIMONSTER_VERSION "v0.3-dist" +#endif + +/* Set backend name if unset */ +#ifndef BACKEND_NAME + #define BACKEND_NAME "unspec" +#endif + /* API call attributes and visibilities */ #ifndef MM_API #ifdef _WIN32 @@ -32,13 +42,15 @@ /* Debug messages only compile in when DEBUG is set */ #ifdef DEBUG - #define DBGPF(format, ...) fprintf(stderr, (format), __VA_ARGS__) - #define DBG(message) fprintf(stderr, "%s", (message)) + #define DBGPF(format, ...) fprintf(stderr, "debug/%s\t" format "\n", (BACKEND_NAME), __VA_ARGS__) #else #define DBGPF(format, ...) - #define DBG(message) #endif +/* Log messages should be routed through these macros to ensure interoperability with different core implementations */ +#define LOGPF(format, ...) fprintf(stderr, "%s\t" format "\n", (BACKEND_NAME), __VA_ARGS__) +#define LOG(message) fprintf(stderr, "%s\t%s\n", (BACKEND_NAME), (message)) + /* Stop compilation if the build system reports an error */ #ifdef BUILD_ERROR #error The build system reported an error, compilation stopped. Refer to the invocation for this compilation unit for more information. @@ -87,8 +99,11 @@ struct _managed_fd; * Parse instance configuration from the user-supplied configuration * file. Returning a non-zero value fails config parsing. * * mmbackend_channel - * Parse a channel-spec to be mapped to/from. Returning NULL signals an - * out-of-memory condition and terminates the program. + * Parse a channel-spec to be mapped to/from. The `flags` parameter supplies + * additional information to the parser, such as whether the channel is being + * queried for use as input (to the MIDIMonster core) and/or output + * (from the MIDIMonster core) channel (on a per-query basis). + * Returning NULL signals an out-of-memory condition and terminates the program. * * mmbackend_start * Called after all instances have been created and all mappings * have been set up. Only backends for which instances have been configured @@ -121,14 +136,20 @@ struct _managed_fd; */ typedef int (*mmbackend_handle_event)(struct _backend_instance* inst, size_t channels, struct _backend_channel** c, struct _channel_value* v); typedef struct _backend_instance* (*mmbackend_create_instance)(); -typedef struct _backend_channel* (*mmbackend_parse_channel)(struct _backend_instance* instance, char* spec); +typedef struct _backend_channel* (*mmbackend_parse_channel)(struct _backend_instance* instance, char* spec, uint8_t flags); typedef void (*mmbackend_free_channel)(struct _backend_channel* c); typedef int (*mmbackend_configure)(char* option, char* value); typedef int (*mmbackend_configure_instance)(struct _backend_instance* instance, char* option, char* value); typedef int (*mmbackend_process_fd)(size_t nfds, struct _managed_fd* fds); -typedef int (*mmbackend_start)(); +typedef int (*mmbackend_start)(size_t ninstances, struct _backend_instance** inst); typedef uint32_t (*mmbackend_interval)(); -typedef int (*mmbackend_shutdown)(); +typedef int (*mmbackend_shutdown)(size_t ninstances, struct _backend_instance** inst); + +/* Bit masks for the `flags` parameter to mmbackend_parse_channel */ +typedef enum { + mmchannel_input = 0x1, + mmchannel_output = 0x2 +} mmbe_channel_flags; /* Channel event value, .normalised is used by backends to determine channel values */ typedef struct _channel_value { |