release v0.18.9

Has been superseded by the previous commit.

NEWS

@@ -1,3 +1,16 @@
+ver 0.18.9 (2014/03/02)
+* protocol
+  - "findadd" requires the "add" permission
+* output
+  - alsa: improved workaround for noise after manual song change
+* decoder
+  - vorbis: fix linker failure when libvorbis/libogg are static
+* encoder
+  - vorbis: fix another linker failure
+* output
+  - pipe: fix hanging child process due to blocked signals
+* fix build failure due to missing signal.h include
+
 ver 0.18.8 (2014/02/07)
 * decoder
   - ffmpeg: support libav v10_alpha1

configure.ac

@@ -1,6 +1,6 @@
 AC_PREREQ(2.60)
 
-AC_INIT(mpd, 0.18.8, mpd-devel@musicpd.org)
+AC_INIT(mpd, 0.18.9, mpd-devel@musicpd.org)
 
 VERSION_MAJOR=0
 VERSION_MINOR=18
@@ -1023,7 +1023,7 @@ if test x$enable_tremor = xyes; then
 	fi
 fi
 
-MPD_AUTO_PKG(vorbis, VORBIS, [vorbis vorbisfile ogg],
+MPD_AUTO_PKG(vorbis, VORBIS, [vorbisfile vorbis ogg],
 	[Ogg Vorbis decoder], [libvorbis not found])
 if test x$enable_vorbis = xyes; then
 	AC_DEFINE(ENABLE_VORBIS_DECODER, 1, [Define for Ogg Vorbis support])
@@ -1139,7 +1139,7 @@ fi
 AM_CONDITIONAL(ENABLE_FLAC_ENCODER, test x$enable_flac_encoder = xyes)
 
 dnl ---------------------------- Ogg Vorbis Encoder ---------------------------
-MPD_AUTO_PKG(vorbis_encoder, VORBISENC, [vorbisenc vorbis],
+MPD_AUTO_PKG(vorbis_encoder, VORBISENC, [vorbisenc vorbis ogg],
 	[Ogg Vorbis encoder], [libvorbisenc not found])
 
 if test x$enable_vorbis_encoder = xyes; then

src/command/AllCommands.cxx

@@ -90,7 +90,7 @@ static const struct command commands[] = {
 	{ "disableoutput", PERMISSION_ADMIN, 1, 1, handle_disableoutput },
 	{ "enableoutput", PERMISSION_ADMIN, 1, 1, handle_enableoutput },
 	{ "find", PERMISSION_READ, 2, -1, handle_find },
-	{ "findadd", PERMISSION_READ, 2, -1, handle_findadd},
+	{ "findadd", PERMISSION_ADD, 2, -1, handle_findadd},
 	{ "idle", PERMISSION_READ, 0, -1, handle_idle },
 	{ "kill", PERMISSION_ADMIN, -1, -1, handle_kill },
 	{ "list", PERMISSION_READ, 1, -1, handle_list },

src/event/SignalMonitor.cxx

@@ -39,6 +39,12 @@
 
 #include <algorithm>
 
+#ifdef USE_SIGNALFD
+#include <pthread.h>
+#endif
+
+#include <signal.h>
+
 class SignalMonitor final : private SocketMonitor {
 #ifdef USE_SIGNALFD
 	SignalFD fd;
@@ -99,7 +105,21 @@ static std::atomic_bool signal_pending[MAX_SIGNAL];
 
 static Manual<SignalMonitor> monitor;
 
-#ifndef USE_SIGNALFD
+#ifdef USE_SIGNALFD
+
+/**
+ * This is a pthread_atfork() callback that unblocks the signals that
+ * were blocked for our signalfd().  Without this, our child processes
+ * would inherit the blocked signals.
+ */
+static void
+at_fork_child()
+{
+	sigprocmask(SIG_UNBLOCK, &signal_mask, nullptr);
+}
+
+#else
+
 static void
 SignalCallback(int signo)
 {
@@ -108,6 +128,7 @@ SignalCallback(int signo)
 	if (!signal_pending[signo].exchange(true))
 		monitor->WakeUp();
 }
+
 #endif
 
 void
@@ -115,6 +136,8 @@ SignalMonitorInit(EventLoop &loop)
 {
 #ifdef USE_SIGNALFD
 	sigemptyset(&signal_mask);
+
+	pthread_atfork(nullptr, nullptr, at_fork_child);
 #endif
 
 	monitor.Construct(loop);

src/output/AlsaOutputPlugin.cxx

@@ -106,12 +106,16 @@ struct AlsaOutput {
 	snd_pcm_uframes_t period_position;
 
 	/**
-	 * Set to non-zero when the Raspberry Pi workaround has been
+	 * Do we need to call snd_pcm_prepare() before the next write?
-	 * activated in alsa_recover(); decremented by each write.
+	 * It means that we put the device to SND_PCM_STATE_SETUP by
-	 * This will avoid activating it again, leading to an endless
+	 * calling snd_pcm_drop().
-	 * loop.  This problem was observed with a "RME Digi9636/52".
+	 *
+	 * Without this flag, we could easily recover after a failed
+	 * optimistic write (returning -EBADFD), but the Raspberry Pi
+	 * audio driver is infamous for generating ugly artefacts from
+	 * this.
 	 */
-	unsigned pi_workaround;
+	bool must_prepare;
 
 	/**
 	 * This buffer gets allocated after opening the ALSA device.
@@ -676,8 +680,6 @@ alsa_open(struct audio_output *ao, AudioFormat &audio_format, Error &error)
 {
 	AlsaOutput *ad = (AlsaOutput *)ao;
 
-	ad->pi_workaround = 0;
-
 	int err = snd_pcm_open(&ad->pcm, alsa_device(ad),
 			       SND_PCM_STREAM_PLAYBACK, ad->mode);
 	if (err < 0) {
@@ -699,6 +701,8 @@ alsa_open(struct audio_output *ao, AudioFormat &audio_format, Error &error)
 	ad->in_frame_size = audio_format.GetFrameSize();
 	ad->out_frame_size = ad->pcm_export->GetFrameSize(audio_format);
 
+	ad->must_prepare = false;
+
 	return true;
 }
 
@@ -736,29 +740,6 @@ alsa_recover(AlsaOutput *ad, int err)
 	case SND_PCM_STATE_XRUN:
 		ad->period_position = 0;
 		err = snd_pcm_prepare(ad->pcm);
-
-		if (err == 0 && ad->pi_workaround == 0) {
-			/* this works around a driver bug observed on
-			   the Raspberry Pi: after snd_pcm_drop(), the
-			   whole ring buffer must be invalidated, but
-			   the snd_pcm_prepare() call above makes the
-			   driver play random data that just happens
-			   to be still in the buffer; by adding and
-			   cancelling some silence, this bug does not
-			   occur */
-			alsa_write_silence(ad, ad->period_frames);
-
-			/* cancel the silence data right away to avoid
-			   increasing latency; even though this
-			   function call invalidates the portion of
-			   silence, the driver seems to avoid the
-			   bug */
-			snd_pcm_reset(ad->pcm);
-
-			/* disable the workaround for some time */
-			ad->pi_workaround = 8;
-		}
-
 		break;
 	case SND_PCM_STATE_DISCONNECTED:
 		break;
@@ -801,6 +782,7 @@ alsa_cancel(struct audio_output *ao)
 	AlsaOutput *ad = (AlsaOutput *)ao;
 
 	ad->period_position = 0;
+	ad->must_prepare = true;
 
 	snd_pcm_drop(ad->pcm);
 }
@@ -822,6 +804,16 @@ alsa_play(struct audio_output *ao, const void *chunk, size_t size,
 
 	assert(size % ad->in_frame_size == 0);
 
+	if (ad->must_prepare) {
+		ad->must_prepare = false;
+
+		int err = snd_pcm_prepare(ad->pcm);
+		if (err < 0) {
+			error.Set(alsa_output_domain, err, snd_strerror(-err));
+			return 0;
+		}
+	}
+
 	chunk = ad->pcm_export->Export(chunk, size, size);
 
 	assert(size % ad->out_frame_size == 0);
@@ -834,9 +826,6 @@ alsa_play(struct audio_output *ao, const void *chunk, size_t size,
 			ad->period_position = (ad->period_position + ret)
 				% ad->period_frames;
 
-			if (ad->pi_workaround > 0)
-				--ad->pi_workaround;
-
 			size_t bytes_written = ret * ad->out_frame_size;
 			return ad->pcm_export->CalcSourceSize(bytes_written);
 		}

src/output/PulseOutputPlugin.cxx

@@ -369,8 +369,6 @@ pulse_output_enable(struct audio_output *ao, Error &error)
 
 	po->mainloop = pa_threaded_mainloop_new();
 	if (po->mainloop == nullptr) {
-		g_free(po);
-
 		error.Set(pulse_output_domain,
 			  "pa_threaded_mainloop_new() has failed");
 		return false;