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authorMatthias P. Braendli <matthias.braendli@mpb.li>2014-06-26 20:16:37 +0200
committerMatthias P. Braendli <matthias.braendli@mpb.li>2014-06-26 20:16:37 +0200
commit45613a2ac14272c3e4779dd9aa971b5160bb060e (patch)
treeffec3e9f2e213415a3755849f0feaa53ea5101ad /src/JackInput.h
parentc0ec1e01c7dd84ce694bc5268916cc43870f00cf (diff)
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Add JACK input support
Diffstat (limited to 'src/JackInput.h')
-rw-r--r--src/JackInput.h101
1 files changed, 101 insertions, 0 deletions
diff --git a/src/JackInput.h b/src/JackInput.h
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+/* ------------------------------------------------------------------
+ * Copyright (C) 2011 Martin Storsjo
+ * Copyright (C) 2013,2014 Matthias P. Braendli
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
+ * express or implied.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ * -------------------------------------------------------------------
+ */
+
+#ifndef __JACK_INPUT_H
+#define __JACK_INPUT_H
+#include "config.h"
+#include <cstdio>
+#include <string>
+
+#if HAVE_JACK
+
+extern "C" {
+#include <jack/jack.h>
+}
+
+#include "SampleQueue.h"
+
+// 16 bits per sample is fine for now
+#define BYTES_PER_SAMPLE 2
+
+class JackInput
+{
+ public:
+ JackInput(const std::string& jack_name,
+ unsigned int channels,
+ unsigned int samplerate,
+ SampleQueue<uint8_t>& queue) :
+ m_client(NULL),
+ m_jack_name(jack_name),
+ m_channels(channels),
+ m_rate(samplerate),
+ m_queue(queue) { }
+
+ ~JackInput() {
+ if (m_client) {
+ jack_client_close(m_client);
+ }
+ }
+
+ /* Prepare the audio input */
+ int prepare();
+
+ private:
+ JackInput(const JackInput& other);
+
+ jack_client_t* m_client;
+
+ std::vector<jack_port_t*> m_input_ports;
+
+ std::string m_jack_name;
+ unsigned int m_channels;
+ unsigned int m_rate;
+
+ // Callback for real-time JACK process
+ void jack_process(jack_nframes_t nframes);
+
+ // Callback when JACK shuts down
+ void jack_shutdown()
+ {
+ m_fault = true;
+ }
+
+ bool m_fault;
+ bool m_running;
+
+ SampleQueue<uint8_t>& m_queue;
+
+ // Static functions for JACK callbacks
+ static int process_cb(jack_nframes_t nframes, void* arg)
+ {
+ ((JackInput*)arg)->jack_process(nframes);
+ return 0;
+ }
+
+ static void shutdown_cb(void* arg)
+ {
+ ((JackInput*)arg)->jack_shutdown();
+ }
+
+};
+
+#endif // HAVE_JACK
+
+#endif
+