From cd71055f14b70284d8bd3eb35fadc15b36ba0780 Mon Sep 17 00:00:00 2001
From: "Javier S. Pedro" <javier@javispedro.com>
Date: Mon, 13 Feb 2012 21:16:59 +0100
Subject: use PulseAudio instead of QAudioDevice

---
 fmrxthread.cpp | 203 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 203 insertions(+)
 create mode 100644 fmrxthread.cpp

(limited to 'fmrxthread.cpp')

diff --git a/fmrxthread.cpp b/fmrxthread.cpp
new file mode 100644
index 0000000..0043754
--- /dev/null
+++ b/fmrxthread.cpp
@@ -0,0 +1,203 @@
+#include <unistd.h>
+
+#include <QtCore/QCoreApplication>
+#include <QtCore/QDebug>
+
+#include "fmrxthread.h"
+
+FmRxThread::FmRxThread(QObject *parent) :
+	QThread(parent), m_quit(false), m_error(false), m_fd(-1),
+	m_mainloop(0), m_context(0), m_stream(0)
+{
+}
+
+void FmRxThread::setInputFd(int fd)
+{
+	m_fd = fd;
+}
+
+int FmRxThread::inputFd() const
+{
+	return m_fd;
+}
+
+bool FmRxThread::error() const
+{
+	return m_error;
+}
+
+void FmRxThread::run()
+{
+	m_quit = false;
+	m_error = false;
+
+	if (!configure()) {
+		m_error = true;
+		deconfigure();
+		return;
+	}
+
+	if (!loop()) {
+		m_error = true;
+	}
+
+	deconfigure();
+}
+
+void FmRxThread::stop()
+{
+	m_quit = true;
+	if (m_mainloop) {
+		pa_mainloop_wakeup(m_mainloop);
+	}
+}
+
+bool FmRxThread::configure()
+{
+	pa_context_state_t context_state;
+	pa_stream_state_t stream_state;
+
+	m_mainloop = pa_mainloop_new();
+	if (!m_mainloop) {
+		qWarning("Could not create pa_mainloop");
+		return false;
+	}
+
+	qDebug("FmRx thread connecting to PulseAudio");
+
+	// Find the application name
+	QString appName = QCoreApplication::applicationName();
+	if (appName.isEmpty()) {
+		// Set some default
+		appName = "FmRx MediaService";
+	}
+
+	// Setup the PulseAudio context
+	m_context = pa_context_new(pa_mainloop_get_api(m_mainloop),
+							   appName.toUtf8().data());
+	if (!m_context) {
+		qWarning("Could not create pa_mainloop");
+		return false;
+	}
+
+	if (pa_context_connect(m_context, NULL, PA_CONTEXT_NOFLAGS, NULL) < 0) {
+		qWarning("Could not connect to PulseAudio");
+		return false;
+	}
+
+	do {
+		if (pa_mainloop_iterate(m_mainloop, 1, NULL) < 0) {
+			qWarning("pa_mainloop_iterate() failed");
+			return false;
+		}
+
+		context_state = pa_context_get_state(m_context);
+		if (context_state == PA_CONTEXT_FAILED) {
+			qWarning("Early pa_context connection fail");
+			return false;
+		}
+
+		if (m_quit) return true;
+	} while (context_state != PA_CONTEXT_READY);
+
+	// Setup the stream
+	pa_sample_spec spec;
+	spec.format = PA_SAMPLE_S16LE;
+	spec.channels = 2;
+	spec.rate = 48000;
+
+	m_stream = pa_stream_new(m_context, "FmRx Stream", &spec, NULL);
+	if (!m_stream) {
+		qWarning("Could not create pa_stream");
+		return false;
+	}
+
+	if (pa_stream_connect_playback(m_stream, NULL, NULL, PA_STREAM_NOFLAGS, NULL, NULL) < 0) {
+		qWarning("Could not connect stream");
+		return false;
+	}
+
+	do {
+		if (pa_mainloop_iterate(m_mainloop, 1, NULL) < 0) {
+			qWarning("pa_mainloop_iterate() failed");
+			return false;
+		}
+
+		stream_state = pa_stream_get_state(m_stream);
+		if (stream_state == PA_STREAM_FAILED) {
+			qWarning("Early pa_stream termination");
+			return false;
+		}
+
+		if (m_quit) return true;
+	} while (stream_state != PA_STREAM_READY);
+
+	return true;
+}
+
+void FmRxThread::deconfigure()
+{
+	if (m_stream) {
+		pa_stream_disconnect(m_stream);
+		pa_stream_unref(m_stream);
+		m_stream = 0;
+	}
+	if (m_context) {
+		pa_context_disconnect(m_context);
+		pa_context_unref(m_context);
+		m_context = 0;
+	}
+	if (m_mainloop) {
+		pa_mainloop_free(m_mainloop);
+		m_mainloop = 0;
+	}
+	if (m_fd != -1) {
+		close(m_fd);
+		m_fd = -1;
+	}
+}
+
+bool FmRxThread::loop()
+{
+	// Here comes the main loop
+	while (!m_quit) {
+		void *buffer;
+		size_t maxbytes = (size_t) -1;
+		ssize_t readbytes;
+
+		if (pa_stream_begin_write(m_stream, &buffer, &maxbytes) < 0) {
+			qWarning("Failed to pa_stream_begin_write");
+			return false;
+		}
+
+		readbytes = read(m_fd, buffer, maxbytes);
+		if (readbytes < 0) {
+			qWarning("Failed to read from the FmRx pipe");
+			return false;
+		}
+
+		if (pa_stream_write(m_stream, buffer, readbytes, NULL, 0, PA_SEEK_RELATIVE) < 0) {
+			qWarning("Failed to pa_stream_write");
+			return false;
+		}
+
+		do  {
+			if (pa_mainloop_iterate(m_mainloop, 1, NULL) < 0) {
+				qWarning("pa_mainloop_iterate() failed");
+				return false;
+			}
+			if (m_quit) return true;
+		} while (pa_stream_writable_size(m_stream) == 0);
+
+		if (pa_stream_get_state(m_stream) != PA_STREAM_READY) {
+			qWarning("pa_stream was lost");
+			return false;
+		}
+		if (pa_context_get_state(m_context) != PA_CONTEXT_READY) {
+			qWarning("pa_context was lost");
+			return false;
+		}
+	}
+
+	return true;
+}
-- 
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