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authorDavid Robillard <d@drobilla.net>2007-01-12 04:32:44 +0000
committerDavid Robillard <d@drobilla.net>2007-01-12 04:32:44 +0000
commitcd88e6750d837f8f7aa2b7f3ca54e929172fbbef (patch)
treee1ba5b9325e5352cf8715c5cd553d88655e872b5 /examples/hosts/jack_host.c
parente75478522b098a1016042a7538953f2ff2c3aadb (diff)
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Split jack_host into slv2_simple_jack_host and slv2_host, added MIDI support to slv2_host.
git-svn-id: http://svn.drobilla.net/lad/slv2@251 a436a847-0d15-0410-975c-d299462d15a1
Diffstat (limited to 'examples/hosts/jack_host.c')
-rw-r--r--examples/hosts/jack_host.c220
1 files changed, 0 insertions, 220 deletions
diff --git a/examples/hosts/jack_host.c b/examples/hosts/jack_host.c
deleted file mode 100644
index 655c939..0000000
--- a/examples/hosts/jack_host.c
+++ /dev/null
@@ -1,220 +0,0 @@
-/* LibSLV2 Jack Example Host
- * Copyright (C) 2006 Dave Robillard <drobilla@connect.carleton.ca>
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the Free
- * Software Foundation; either version 2 of the License, or (at your option)
- * any later version.
- *
- * This program is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
- * for more details.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
- * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
- */
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <slv2/slv2.h>
-#include <jack/jack.h>
-
-
-/** This program's data */
-struct JackHost {
- jack_client_t* jack_client; /**< Jack client */
- SLV2Plugin* plugin; /**< Plugin "class" (actually just a few strings) */
- SLV2Instance* instance; /**< Plugin "instance" (loaded shared lib) */
- uint32_t num_ports; /**< Size of the two following arrays: */
- jack_port_t** jack_ports; /**< For audio ports, otherwise NULL */
- float* controls; /**< For control ports, otherwise 0.0f */
-};
-
-
-void die(const char* msg);
-void create_port(struct JackHost* host, uint32_t port_index);
-int jack_process_cb(jack_nframes_t nframes, void* data);
-void list_plugins(SLV2List list);
-
-
-int
-main(int argc, char** argv)
-{
- struct JackHost host;
- host.jack_client = NULL;
- host.num_ports = 0;
- host.jack_ports = NULL;
- host.controls = NULL;
-
- /* Find all installed plugins */
- SLV2List plugins = slv2_list_new();
- slv2_list_load_all(plugins);
- //slv2_list_load_bundle(plugins, "http://www.scs.carleton.ca/~drobilla/files/Amp-swh.lv2");
-
- /* Find the plugin to run */
- const char* plugin_uri = (argc == 2) ? argv[1] : NULL;
-
- if (!plugin_uri) {
- fprintf(stderr, "\nYou must specify a plugin URI to load.\n");
- fprintf(stderr, "\nKnown plugins:\n\n");
- list_plugins(plugins);
- return EXIT_FAILURE;
- }
-
- printf("URI:\t%s\n", plugin_uri);
- host.plugin = slv2_list_get_plugin_by_uri(plugins, plugin_uri);
-
- if (!host.plugin) {
- fprintf(stderr, "Failed to find plugin %s.\n", plugin_uri);
- slv2_list_free(plugins);
- return EXIT_FAILURE;
- }
-
- /* Get the plugin's name */
- char* name = slv2_plugin_get_name(host.plugin);
- printf("Name:\t%s\n", name);
-
- /* Connect to JACK (with plugin name as client name) */
- host.jack_client = jack_client_open(name, JackNullOption, NULL);
- free(name);
- if (!host.jack_client)
- die("Failed to connect to JACK.");
- else
- printf("Connected to JACK.\n");
-
- /* Instantiate the plugin */
- host.instance = slv2_plugin_instantiate(
- host.plugin, jack_get_sample_rate(host.jack_client), NULL);
- if (!host.instance)
- die("Failed to instantiate plugin.\n");
- else
- printf("Succesfully instantiated plugin.\n");
-
- jack_set_process_callback(host.jack_client, &jack_process_cb, (void*)(&host));
-
- /* Create ports */
- host.num_ports = slv2_plugin_get_num_ports(host.plugin);
- host.jack_ports = calloc((size_t)host.num_ports, sizeof(jack_port_t*));
- host.controls = calloc((size_t)host.num_ports, sizeof(float*));
-
- for (uint32_t i=0; i < host.num_ports; ++i)
- create_port(&host, i);
-
- /* Activate plugin and JACK */
- slv2_instance_activate(host.instance);
- jack_activate(host.jack_client);
-
- /* Run */
- printf("Press enter to quit: ");
- getc(stdin);
- printf("\n");
-
- /* Deactivate plugin and JACK */
- slv2_instance_free(host.instance);
- slv2_list_free(plugins);
-
- printf("Shutting down JACK.\n");
- for (unsigned long i=0; i < host.num_ports; ++i) {
- if (host.jack_ports[i] != NULL) {
- jack_port_unregister(host.jack_client, host.jack_ports[i]);
- host.jack_ports[i] = NULL;
- }
- }
- jack_client_close(host.jack_client);
-
- return 0;
-}
-
-
-/** Abort and exit on error */
-void
-die(const char* msg)
-{
- fprintf(stderr, "%s\n", msg);
- exit(EXIT_FAILURE);
-}
-
-
-/** Creates a port and connects the plugin instance to it's data location.
- *
- * For audio ports, creates a jack port and connects plugin port to buffer.
- *
- * For control ports, sets controls array to default value and connects plugin
- * port to that element.
- */
-void
-create_port(struct JackHost* host,
- uint32_t port_index)
-{
- /* Make sure this is a float port */
- char* type = slv2_port_get_data_type(host->plugin, port_index);
- if (strcmp(type, SLV2_DATA_TYPE_FLOAT))
- die("Unrecognized data type, aborting.");
- free(type);
-
- /* Get the port symbol (label) for console printing */
- char* symbol = slv2_port_get_symbol(host->plugin, port_index);
-
- /* Initialize the port array elements */
- host->jack_ports[port_index] = NULL;
- host->controls[port_index] = 0.0f;
-
- /* Get the 'class' of the port (control input, audio output, etc) */
- enum SLV2PortClass class = slv2_port_get_class(host->plugin, port_index);
-
- /* Connect the port based on it's 'class' */
- switch (class) {
- case SLV2_CONTROL_RATE_INPUT:
- host->controls[port_index] = slv2_port_get_default_value(host->plugin, port_index);
- slv2_instance_connect_port(host->instance, port_index, &host->controls[port_index]);
- printf("Set %s to %f\n", symbol, host->controls[port_index]);
- break;
- case SLV2_CONTROL_RATE_OUTPUT:
- slv2_instance_connect_port(host->instance, port_index, &host->controls[port_index]);
- break;
- case SLV2_AUDIO_RATE_INPUT:
- host->jack_ports[port_index] = jack_port_register(host->jack_client,
- symbol, JACK_DEFAULT_AUDIO_TYPE, JackPortIsInput, 0);
- break;
- case SLV2_AUDIO_RATE_OUTPUT:
- host->jack_ports[port_index] = jack_port_register(host->jack_client,
- symbol, JACK_DEFAULT_AUDIO_TYPE, JackPortIsOutput, 0);
- break;
- default:
- die("ERROR: Unknown port type, aborting messily!");
- }
-
- free(symbol);
-}
-
-
-/** Jack process callback. */
-int
-jack_process_cb(jack_nframes_t nframes, void* data)
-{
- struct JackHost* host = (struct JackHost*)data;
-
- /* Connect plugin ports directly to JACK buffers */
- for (uint32_t i=0; i < host->num_ports; ++i)
- if (host->jack_ports[i] != NULL)
- slv2_instance_connect_port(host->instance, i,
- jack_port_get_buffer(host->jack_ports[i], nframes));
-
- /* Run plugin for this cycle */
- slv2_instance_run(host->instance, nframes);
-
- return 0;
-}
-
-
-void
-list_plugins(SLV2List list)
-{
- for (size_t i=0; i < slv2_list_get_length(list); ++i) {
- const SLV2Plugin* const p = slv2_list_get_plugin_by_index(list, i);
- printf("%s\n", slv2_plugin_get_uri(p));
- }
-}