Initial VISCA backend implementation

1 files changed, 57 insertions, 0 deletions

diff --git a/backends/visca.h b/backends/visca.h
new file mode 100644
index 0000000..54c80f7
--- /dev/null
+++ b/backends/visca.h
@@ -0,0 +1,57 @@
+#include "midimonster.h"
+
+MM_PLUGIN_API int init();
+static int ptz_configure(char* option, char* value);
+static int ptz_configure_instance(instance* inst, char* option, char* value);
+static int ptz_instance(instance* inst);
+static channel* ptz_channel(instance* inst, char* spec, uint8_t flags);
+static int ptz_set(instance* inst, size_t num, channel** c, channel_value* v);
+static int ptz_handle(size_t num, managed_fd* fds);
+static int ptz_start(size_t n, instance** inst);
+static int ptz_shutdown(size_t n, instance** inst);
+
+#define VISCA_BUFFER_LENGTH 50
+
+typedef struct /*_ptz_instance_data*/ {
+	int fd;
+	uint8_t cam_address;
+	uint32_t x;
+	uint32_t y;
+	uint8_t panspeed;
+	uint8_t tiltspeed;
+} ptz_instance_data;
+
+enum /*ptz_channels*/ {
+	pan = 0,
+	tilt,
+	panspeed,
+	tiltspeed,
+	zoom,
+	focus,
+	call,
+	sentinel
+};
+
+typedef size_t (*ptz_channel_set)(instance*, channel*, channel_value*, uint8_t* msg);
+static size_t ptz_set_pantilt(instance* inst, channel* c, channel_value* v, uint8_t* msg);
+static size_t ptz_set_ptspeed(instance* inst, channel* c, channel_value* v, uint8_t* msg);
+static size_t ptz_set_zoom(instance* inst, channel* c, channel_value* v, uint8_t* msg);
+static size_t ptz_set_focus(instance* inst, channel* c, channel_value* v, uint8_t* msg);
+static size_t ptz_set_memory(instance* inst, channel* c, channel_value* v, uint8_t* msg);
+
+static struct {
+	char* name;
+	size_t bytes;
+	uint8_t pattern[VISCA_BUFFER_LENGTH];
+	size_t min;
+	size_t max;
+	ptz_channel_set set;
+} ptz_channels[] = {
+	[pan] = {"pan", 14, {0x80, 0x01, 0x06, 0x02, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0xFF}, 0, 4000, ptz_set_pantilt},
+	[tilt] = {"tilt", 14, {0x80, 0x01, 0x06, 0x02, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0xFF}, 0, 4000, ptz_set_pantilt},
+	[panspeed] = {"panspeed", 0, {0}, 0x01, 0x18, ptz_set_ptspeed},
+	[tiltspeed] = {"tiltspeed", 0, {0}, 0x01, 0x14, ptz_set_ptspeed},
+	[zoom] = {"zoom", 9, {0x80, 0x01, 0x04, 0x47, 0, 0, 0, 0, 0xFF}, 0, 4000, ptz_set_zoom},
+	[focus] = {"focus", 9, {0x80, 0x01, 0x04, 0x48, 0, 0, 0, 0, 0xFF}, 0, 4000, ptz_set_focus},
+	[call] = {"memory", 7, {0x80, 0x01, 0x04, 0x3F, 0x02, 0, 0xFF}, 0, 254, ptz_set_memory}
+};