Added (broken) PulseAudio audio player. It currently deadlocks.

Originally committed to SVN as r1118.

aegisub/Makefile.am

@@ -29,6 +29,10 @@ if HAVE_ALSA
 AUDIO_PLAYER += audio_player_alsa.cpp 
 LDADD += -lasound
 endif
+if HAVE_PULSEAUDIO
+AUDIO_PLAYER += audio_player_pulse.cpp 
+LDADD += -lpulse -lpulse-simple
+endif
 
 if HAVE_RUBY
 AUTO4RUBY=auto4_ruby_assfile.cpp auto4_ruby.cpp auto4_ruby_dialog.cpp

aegisub/audio_player_pulse.cpp

@@ -0,0 +1,428 @@
+// Copyright (c) 2007, Niels Martin Hansen
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are met:
+//
+//   * Redistributions of source code must retain the above copyright notice,
+//     this list of conditions and the following disclaimer.
+//   * Redistributions in binary form must reproduce the above copyright notice,
+//     this list of conditions and the following disclaimer in the documentation
+//     and/or other materials provided with the distribution.
+//   * Neither the name of the Aegisub Group nor the names of its contributors
+//     may be used to endorse or promote products derived from this software
+//     without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+// POSSIBILITY OF SUCH DAMAGE.
+//
+// -----------------------------------------------------------------------------
+//
+// AEGISUB
+//
+// Website: http://aegisub.cellosoft.com
+// Contact: mailto:jiifurusu@gmail.com
+//
+
+
+///////////
+// Headers
+#include <wx/wxprec.h>
+#include "audio_player.h"
+#include "audio_provider.h"
+#include "utils.h"
+#include "options.h"
+#include <pulse/pulseaudio.h>
+#include <pulse/simple.h>
+
+
+//////////////
+// Prototypes
+class PulseAudioPlayer;
+
+
+//////////
+// Thread
+class PulseAudioPlayerThread : public wxThread {
+private:
+	wxMutex play_mutex; // held while playing
+	wxSemaphore play_notify; // posted when a playback operation is set up
+	wxSemaphore stop_notify; // when set, audio playback should stop asap
+	wxSemaphore shutdown_notify; // when set, thread should shutdown asap
+	wxMutex parameter_mutex;
+
+	AudioProvider *provider; // provides sample data!
+
+	pa_simple *s; // stream handle
+	int paerror;
+
+	volatile double volume; // volume to get audio at
+	volatile unsigned long start_frame; // first frame of playback
+	volatile unsigned long cur_frame; // last written frame + 1
+	volatile unsigned long end_frame; // last frame to play
+
+	void PlaybackLoop();
+
+public:
+	PulseAudioPlayerThread(AudioProvider *_provider);
+	~PulseAudioPlayerThread();
+	wxThread::ExitCode Entry();
+
+	// The following methods are all thread safe
+	void Play(unsigned long _start_frame, unsigned long _num_frames); // Notify thread to stop any playback and instead play specified range
+	void SetEndPosition(unsigned long _end_frame); // Notify thread to use new end position
+	void Stop(); // Notify thread to stop audio playback
+	void StopWait(); // Notify thread to stop, and wait for it to do it
+	void Shutdown(); // Notify the thread to stop playback and die
+	void SetVolume(double new_volume); // Set volume
+	unsigned long GetStartPosition(); // Get first played back frame number
+	unsigned long GetEndPosition(); // Get last frame number to be played back
+	unsigned long GetCurrentPosition(); // Get currently played back frame number
+	bool IsPlaying();
+};
+
+
+//////////////////////
+// Pulse Audio player
+class PulseAudioPlayer : public AudioPlayer {
+private:
+	float volume;
+
+	PulseAudioPlayerThread *thread;
+
+public:
+	PulseAudioPlayer();
+	~PulseAudioPlayer();
+
+	void OpenStream();
+	void CloseStream();
+
+	void Play(__int64 start,__int64 count);
+	void Stop(bool timerToo=true);
+	bool IsPlaying();
+
+	__int64 GetStartPosition();
+	__int64 GetEndPosition();
+	__int64 GetCurrentPosition();
+	void SetEndPosition(__int64 pos);
+	void SetCurrentPosition(__int64 pos);
+
+	void SetVolume(double vol) { volume = vol; }
+	double GetVolume() { return volume; }
+};
+
+
+
+///////////
+// Factory
+class PulseAudioPlayerFactory : public AudioPlayerFactory {
+public:
+	AudioPlayer *CreatePlayer() { return new PulseAudioPlayer(); }
+	PulseAudioPlayerFactory() : AudioPlayerFactory(_T("pulse")) {}
+} registerPulsePlayer;
+
+
+
+///////////////
+// Constructor
+PulseAudioPlayer::PulseAudioPlayer() {
+	volume = 1.0f;
+	thread = NULL;
+}
+
+
+//////////////
+// Destructor
+PulseAudioPlayer::~PulseAudioPlayer() {
+	CloseStream();
+}
+
+
+///////////////
+// Open stream
+void PulseAudioPlayer::OpenStream() {
+	CloseStream();
+
+	// Get provider
+	AudioProvider *provider = GetProvider();
+
+	try {
+		thread = new PulseAudioPlayerThread(provider);
+		thread->Create();
+		thread->Run();
+	}
+	catch (const char *e) {
+		wxLogError(_T("Failed to initialise PulseAudio: %s"), wxString(e, wxConvLocal).c_str());
+	}
+}
+
+
+////////////////
+// Close stream
+void PulseAudioPlayer::CloseStream() {
+	if (!thread) return;
+
+	thread->Shutdown();
+	thread->Wait();
+	thread = 0;
+}
+
+
+////////
+// Play
+void PulseAudioPlayer::Play(__int64 start,__int64 count) {
+	// Make sure that it's stopped
+	thread->Stop();
+
+	thread->Play(start, count);
+}
+
+
+////////
+// Stop
+void PulseAudioPlayer::Stop(bool timerToo) {
+	if (thread) thread->Stop();
+
+        if (timerToo && displayTimer) {
+                displayTimer->Stop();
+        }
+}
+
+
+bool PulseAudioPlayer::IsPlaying()
+{
+	return thread && thread->IsPlaying();
+}
+
+
+///////////
+// Set end
+void PulseAudioPlayer::SetEndPosition(__int64 pos) {
+	if (thread) thread->SetEndPosition(pos);
+}
+
+
+////////////////////////
+// Set current position
+void PulseAudioPlayer::SetCurrentPosition(__int64 pos) {
+	assert(false); // not supported (yet?)
+	// I believe this isn't used anywhere. I hope not.
+}
+
+
+__int64 PulseAudioPlayer::GetStartPosition()
+{
+	if (thread) return thread->GetStartPosition();
+	return 0;
+}
+
+
+__int64 PulseAudioPlayer::GetEndPosition()
+{
+	if (thread) return thread->GetEndPosition();
+	return 0;
+}
+
+
+////////////////////////
+// Get current position
+__int64 PulseAudioPlayer::GetCurrentPosition() {
+	if (thread) return thread->GetCurrentPosition();
+	return 0;
+}
+
+
+
+//////////////////////
+// Thread constructor
+PulseAudioPlayerThread::PulseAudioPlayerThread(AudioProvider *_provider)
+: wxThread(wxTHREAD_JOINABLE)
+, play_notify(0, 1)
+, stop_notify(0, 1)
+, shutdown_notify(0, 1)
+, provider(_provider)
+{
+	pa_sample_spec ss;
+	ss.format = PA_SAMPLE_S16LE;
+	ss.channels = provider->GetChannels();
+	ss.rate = provider->GetSampleRate();
+
+	s = pa_simple_new(
+		NULL, // default server
+		"Aegisub", // application name
+		PA_STREAM_PLAYBACK,
+		NULL, // default device
+		"Sound", // stream description
+		&ss, // sample format
+		NULL, // default channel map
+		NULL, // default buffering attributes
+		&paerror // store error code
+		);
+	if (!s)	throw pa_strerror(paerror);
+}
+
+
+/////////////////////
+// Thread destructor
+PulseAudioPlayerThread::~PulseAudioPlayerThread() {
+	pa_simple_free(s);
+}
+
+
+//////////////////////
+// Thread entry point
+wxThread::ExitCode PulseAudioPlayerThread::Entry()
+{
+	// Loop as long as we aren't told to shutdown
+	while (shutdown_notify.TryWait() == wxSEMA_BUSY) {
+		// Wait for a playback operation
+		if (play_notify.WaitTimeout(100) == wxSEMA_NO_ERROR) {
+			// So playback was posted... now play something
+			play_mutex.Lock();
+			PlaybackLoop();
+			play_mutex.Unlock();
+		}
+		cur_frame = cur_frame / 2;
+	}
+
+	return 0;
+}
+
+void PulseAudioPlayerThread::PlaybackLoop()
+{
+	// Bytes per frame
+	unsigned long bpf = provider->GetChannels() * provider->GetBytesPerSample();
+	// Number of frames in a read
+	unsigned long datalen = provider->GetSampleRate()/8;
+	// Read buffer
+	void *data = malloc(datalen * bpf);
+	unsigned long cur_pos = 0;
+
+	while (true) {
+		// Get/set parameters
+		parameter_mutex.Lock();
+		double vol = volume;
+		cur_frame = cur_pos;
+		unsigned long end_pos = end_frame;
+		parameter_mutex.Unlock();
+
+		// Check for stop
+		if (stop_notify.TryWait() != wxSEMA_BUSY) {
+			pa_simple_flush(s, &paerror);
+			break;
+		}
+
+		// Check for end of stream
+		if (cur_pos >= end_pos) {
+			pa_simple_drain(s, &paerror);
+			break;
+		}
+
+		// Write some frames
+		unsigned long to_read = datalen;
+		if (cur_pos + to_read > end_pos)
+			to_read = end_pos - cur_pos;
+		provider->GetAudioWithVolume(data, cur_pos, to_read, vol);
+		if (pa_simple_write(s, data, to_read*bpf, &paerror) < 0) break;
+		cur_pos += to_read;
+	}
+
+	free(data);
+}
+
+
+void PulseAudioPlayerThread::Play(unsigned long _start_frame, unsigned long _num_frames)
+{
+	StopWait();
+
+	cur_frame = start_frame = _start_frame;
+	end_frame = start_frame + _num_frames;
+	
+	play_notify.Post();
+}
+
+
+void PulseAudioPlayerThread::SetEndPosition(unsigned long _end_frame)
+{
+	parameter_mutex.Lock();
+	end_frame = _end_frame;
+	parameter_mutex.Unlock();
+}
+
+
+////////////////////////
+// Stop playback thread
+void PulseAudioPlayerThread::Stop()
+{
+	stop_notify.Post();	
+}
+
+
+void PulseAudioPlayerThread::StopWait()
+{
+	stop_notify.Post();
+	// Now wait for the play mutex to have been freed
+	play_mutex.Lock();
+	play_mutex.Unlock();
+}
+
+
+void PulseAudioPlayerThread::Shutdown()
+{
+	Stop();
+	shutdown_notify.Post();
+}
+
+
+void PulseAudioPlayerThread::SetVolume(double new_volume)
+{
+	parameter_mutex.Lock();
+	volume = new_volume;
+	parameter_mutex.Unlock();
+}
+
+
+unsigned long PulseAudioPlayerThread::GetStartPosition()
+{
+	wxMutexLocker lock(parameter_mutex);
+	return start_frame;
+}
+
+
+unsigned long PulseAudioPlayerThread::GetEndPosition()
+{
+	wxMutexLocker lock(parameter_mutex);
+	return end_frame;
+}
+
+
+unsigned long PulseAudioPlayerThread::GetCurrentPosition()
+{
+	// Step 1: Get last written frame number
+	parameter_mutex.Lock();
+	unsigned long pos = cur_frame;
+	parameter_mutex.Unlock();
+
+	// Step 2: ???
+
+	// Step 3: Profit!
+	return pos;
+}
+
+
+bool PulseAudioPlayerThread::IsPlaying()
+{
+	return play_mutex.TryLock() == wxMUTEX_BUSY;
+}
+
+
+

configure.ac

@@ -69,6 +69,10 @@ ACX_PTHREAD([], [
 AC_CHECK_LIB([asound], [snd_pcm_open], [found_audio=yes], [with_alsa=no])
 AC_CHECK_LIB([portaudio], [Pa_Initialize], [found_audio=yes], [with_portaudio=no])
 AC_CHECK_FUNCS([Pa_GetStreamTime])
+PKG_CHECK_MODULES([LIBPULSE], libpulse >= 0.5,
+	[found_audio=yes],
+	[with_pulseaudio=no]
+)
 AC_CHECK_LIB([avcodec], [avcodec_init],, [AC_MSG_ERROR([avcodec not found.])])
 AC_CHECK_LIB([avformat], [av_read_frame],, [AC_MSG_ERROR([avformat not found.])])
 AC_CHECK_LIB([hunspell], [main],, [with_hunspell=no])
@@ -212,6 +216,7 @@ AC_CONFIG_SUBDIRS([csri])
 AM_CONDITIONAL([USE_LIBASS], [test "$with_libass" != "no" ])
 AM_CONDITIONAL([HAVE_ALSA], [test "$with_alsa" != "no"])
 AM_CONDITIONAL([HAVE_PORTAUDIO], [test "$with_portaudio" != "no"])
+AM_CONDITIONAL([HAVE_PULSEAUDIO], [test "$with_pulseaudio" != "no"])
 AM_CONDITIONAL([HAVE_HUNSPELL], [test "$with_hunspell" != "no"])
 AM_CONDITIONAL([HAVE_RUBY], [test "$with_ruby" != "no"])