rework decoder states

3 files changed, 135 insertions, 148 deletions

diff --git a/lib/dvb/decoder.cpp b/lib/dvb/decoder.cpp
index 6ad39225..66b923a6 100644
--- a/lib/dvb/decoder.cpp
+++ b/lib/dvb/decoder.cpp
@@ -39,7 +39,7 @@
 DEFINE_REF(eDVBAudio);
 
 eDVBAudio::eDVBAudio(eDVBDemux *demux, int dev)
-	:m_demux(demux), m_dev(dev), m_is_freezed(0)
+	:m_demux(demux), m_dev(dev)
 {
 	char filename[128];
 #if HAVE_DVB_API_VERSION < 3
@@ -194,7 +194,7 @@ int eDVBAudio::startPid(int pid, int type)
 		*/
 	}
 
-	eDebugNoNewLine("AUDIO_SET_BYPASS - ");
+	eDebugNoNewLine("AUDIO_SET_BYPASS(%d) - ", bypass);
 	if (::ioctl(m_fd, AUDIO_SET_BYPASS_MODE, bypass) < 0)
 		eDebug("failed (%m)");
 	else
@@ -240,28 +240,20 @@ void eDVBAudio::flush()
 
 void eDVBAudio::freeze()
 {
-	if (!m_is_freezed)
-	{
-		eDebugNoNewLine("AUDIO_PAUSE - ");
-		if (::ioctl(m_fd, AUDIO_PAUSE) < 0)
-			eDebug("failed (%m)");
-		else
-			eDebug("ok");
-		m_is_freezed=1;
-	}
+	eDebugNoNewLine("AUDIO_PAUSE - ");
+	if (::ioctl(m_fd, AUDIO_PAUSE) < 0)
+		eDebug("failed (%m)");
+	else
+		eDebug("ok");
 }
 
 void eDVBAudio::unfreeze()
 {
-	if (m_is_freezed)
-	{
-		eDebugNoNewLine("AUDIO_CONTINUE - ");
-		if (::ioctl(m_fd, AUDIO_CONTINUE) < 0)
-			eDebug("failed (%m)");
-		else
-			eDebug("ok");
-		m_is_freezed=0;
-	}
+	eDebugNoNewLine("AUDIO_CONTINUE - ");
+	if (::ioctl(m_fd, AUDIO_CONTINUE) < 0)
+		eDebug("failed (%m)");
+	else
+		eDebug("ok");
 }
 
 void eDVBAudio::setChannel(int channel)
@@ -299,7 +291,7 @@ eDVBAudio::~eDVBAudio()
 DEFINE_REF(eDVBVideo);
 
 eDVBVideo::eDVBVideo(eDVBDemux *demux, int dev)
-	:m_demux(demux), m_dev(dev), m_is_slow_motion(0), m_is_fast_forward(0), m_is_freezed(0)
+	:m_demux(demux), m_dev(dev)
 {
 	char filename[128];
 #if HAVE_DVB_API_VERSION < 3
@@ -461,34 +453,25 @@ void eDVBVideo::flush()
 
 void eDVBVideo::freeze()
 {
-	if (!m_is_freezed)
-	{
-		eDebugNoNewLine("VIDEO_FREEZE - ");
-		if (::ioctl(m_fd, VIDEO_FREEZE) < 0)
-			eDebug("failed (%m)");
-		else
-			eDebug("ok");
-		m_is_freezed=1;
-	}
+	eDebugNoNewLine("VIDEO_FREEZE - ");
+	if (::ioctl(m_fd, VIDEO_FREEZE) < 0)
+		eDebug("failed (%m)");
+	else
+		eDebug("ok");
 }
 
 void eDVBVideo::unfreeze()
 {
-	if (m_is_freezed)
-	{
-		eDebugNoNewLine("VIDEO_CONTINUE - ");
-		if (::ioctl(m_fd, VIDEO_CONTINUE) < 0)
-			eDebug("failed (%m)");
-		else
-			eDebug("ok");
-		m_is_freezed=0;
-	}
+	eDebugNoNewLine("VIDEO_CONTINUE - ");
+	if (::ioctl(m_fd, VIDEO_CONTINUE) < 0)
+		eDebug("failed (%m)");
+	else
+		eDebug("ok");
 }
 
 int eDVBVideo::setSlowMotion(int repeat)
 {
-	eDebugNoNewLine("VIDEO_SLOWMOTION - ");
-	m_is_slow_motion = repeat;
+	eDebugNoNewLine("VIDEO_SLOWMOTION(%d) - ", repeat);
 	int ret = ::ioctl(m_fd, VIDEO_SLOWMOTION, repeat);
 	if (ret < 0)
 		eDebug("failed(%m)");
@@ -499,8 +482,7 @@ int eDVBVideo::setSlowMotion(int repeat)
 
 int eDVBVideo::setFastForward(int skip)
 {
-	eDebugNoNewLine("VIDEO_FAST_FORWARD - ");
-	m_is_fast_forward = skip;
+	eDebugNoNewLine("VIDEO_FAST_FORWARD(%d) - ", skip);
 	int ret = ::ioctl(m_fd, VIDEO_FAST_FORWARD, skip);
 	if (ret < 0)
 		eDebug("failed(%m)");
@@ -527,11 +509,6 @@ int eDVBVideo::getPTS(pts_t &now)
 
 eDVBVideo::~eDVBVideo()
 {
-	if (m_is_slow_motion)
-		setSlowMotion(0);
-	if (m_is_fast_forward)
-		setFastForward(0);
-	unfreeze();
 	if (m_fd >= 0)
 		::close(m_fd);
 	if (m_fd_demux >= 0)
@@ -750,14 +727,14 @@ int eTSMPEGDecoder::setState()
 {
 	int res = 0;
 
-	int noaudio = m_is_sm || m_is_ff || m_is_trickmode;
+	int noaudio = (m_state != statePlay) && (m_state != statePause);
 	int nott = noaudio; /* actually same conditions */
 
 	if ((noaudio && m_audio) || (!m_audio && !noaudio))
-		m_changed |= changeAudio;
+		m_changed |= changeAudio | changeState;
 
 	if ((nott && m_text) || (!m_text && !nott))
-		m_changed |= changeText;
+		m_changed |= changeText | changeState;
 
 	bool changed = !!m_changed;
 #if HAVE_DVB_API_VERSION < 3
@@ -900,6 +877,39 @@ int eTSMPEGDecoder::setState()
 		m_changed &= ~changeText;
 	}
 #endif
+
+	if (m_changed & changeState)
+	{
+					/* play, slowmotion, fast-forward */
+		int state_table[6][4] = 
+			{
+				/* [stateStop] =                 */ {0, 0, 0},
+				/* [statePause] =                */ {0, 0, 0},
+				/* [statePlay] =                 */ {1, 0, 0},
+				/* [stateDecoderFastForward] =   */ {1, 0, m_ff_sm_ratio},
+				/* [stateHighspeedFastForward] = */ {1, 0, 1},
+				/* [stateSlowMotion] =           */ {1, m_ff_sm_ratio, 0}
+			};
+		int *s = state_table[m_state];
+		if (m_video)
+		{
+			m_video->setSlowMotion(s[1]);
+			m_video->setFastForward(s[2]);
+			if (s[0])
+				m_video->unfreeze();
+			else
+				m_video->freeze();
+		}
+		if (m_audio)
+		{
+			if (s[0])
+				m_audio->unfreeze();
+			else
+				m_audio->freeze();
+		}
+		m_changed &= ~changeState;
+	}
+
 	if (changed && !m_video && m_audio && m_radio_pic.length())
 		showSinglePic(m_radio_pic.c_str());
 
@@ -946,7 +956,7 @@ eTSMPEGDecoder::eTSMPEGDecoder(eDVBDemux *demux, int decoder)
 {
 	demux->connectEvent(slot(*this, &eTSMPEGDecoder::demux_event), m_demux_event_conn);
 	CONNECT(m_showSinglePicTimer->timeout, eTSMPEGDecoder::finishShowSinglePic);
-	m_is_ff = m_is_sm = m_is_trickmode = 0;
+	m_state = stateStop;
 }
 
 eTSMPEGDecoder::~eTSMPEGDecoder()
@@ -1028,82 +1038,61 @@ RESULT eTSMPEGDecoder::setSyncMaster(int who)
 	return -1;
 }
 
-RESULT eTSMPEGDecoder::start()
-{
-	RESULT r;
-	r = setState();
-	if (r)
-		return r;
-	return unfreeze();
-}
-
-	/* preroll is start in freezed mode. */
-RESULT eTSMPEGDecoder::preroll()
+RESULT eTSMPEGDecoder::set()
 {
 	return setState();
 }
 
-RESULT eTSMPEGDecoder::freeze(int cont)
-{
-	if (m_video)
-		m_video->freeze();
-
-	if (m_audio)
-		m_audio->freeze();
-
-	return 0;
-}
-
-RESULT eTSMPEGDecoder::unfreeze()
-{
-	if (m_video)
-		m_video->unfreeze();
-
-	if (m_audio)
-		m_audio->unfreeze();
-
-	return 0;
-}
-
-RESULT eTSMPEGDecoder::setSinglePictureMode(int when)
+RESULT eTSMPEGDecoder::play()
 {
-	return -1;
+	if (m_state == statePlay)
+		return 0;
+	m_state = statePlay;
+	m_changed |= changeState;
+	return setState();
 }
 
-RESULT eTSMPEGDecoder::setPictureSkipMode(int what)
+RESULT eTSMPEGDecoder::pause()
 {
-	return -1;
+	if (m_state == statePause)
+		return 0;
+	m_state = statePause;
+	m_changed |= changeState;
+	return setState();
 }
 
 RESULT eTSMPEGDecoder::setFastForward(int frames_to_skip)
 {
-	m_is_ff = frames_to_skip != 0;
+	if ((m_state == stateDecoderFastForward) && (m_ff_sm_ratio == frames_to_skip))
+		return 0;
 
-	setState();
-	unfreeze(); // audio might be restarted and still in preroll (freezed) state.
+	m_state = stateDecoderFastForward;
+	m_ff_sm_ratio = frames_to_skip;
+	m_changed |= changeState;
+	return setState();
 
-	if (m_video)
-		return m_video->setFastForward(frames_to_skip);
-	else
-	 	return -1;
+//		return m_video->setFastForward(frames_to_skip);
 }
 
 RESULT eTSMPEGDecoder::setSlowMotion(int repeat)
 {
-	m_is_sm = repeat != 0;
+	if ((m_state == stateSlowMotion) && (m_ff_sm_ratio == repeat))
+		return 0;
 
-	setState();
-	unfreeze(); // audio might be restarted and still in preroll (freezed) state.
-
-	if (m_video)
-		return m_video->setSlowMotion(repeat);
-	else
-		return -1;
+	m_state = stateSlowMotion;
+	m_ff_sm_ratio = repeat;
+	m_changed |= changeState;
+	return setState();
 }
 
-RESULT eTSMPEGDecoder::setZoom(int what)
+RESULT eTSMPEGDecoder::setTrickmode()
 {
-	return -1;
+	if (m_state == stateTrickmode)
+		return 0;
+
+	m_state = stateTrickmode;
+	m_changed |= changeState;
+	return setState();
 }
 
 RESULT eTSMPEGDecoder::flush()
@@ -1127,13 +1116,6 @@ void eTSMPEGDecoder::demux_event(int event)
 	}
 }
 
-RESULT eTSMPEGDecoder::setTrickmode(int what)
-{
-	m_is_trickmode = what;
-	setState();
-	return 0;
-}
-
 RESULT eTSMPEGDecoder::getPTS(int what, pts_t &pts)
 {
 	if (what == 0) /* auto */
diff --git a/lib/dvb/decoder.h b/lib/dvb/decoder.h
index 05e07ef9..04501fe6 100644
--- a/lib/dvb/decoder.h
+++ b/lib/dvb/decoder.h
@@ -119,10 +119,12 @@ private:
 		changeVideo = 1, 
 		changeAudio = 2, 
 		changePCR   = 4,
-		changeText  = 8
+		changeText  = 8,
+		changeState = 16,
 	};
 	int m_changed, m_decoder;
-	int m_is_ff, m_is_sm, m_is_trickmode;
+	int m_state;
+	int m_ff_sm_ratio;
 	int setState();
 	ePtr<eConnection> m_demux_event_conn;
 	ePtr<eConnection> m_video_event_conn;
@@ -148,17 +150,33 @@ public:
 	RESULT setSyncPCR(int pcrpid);
 	RESULT setTextPID(int textpid);
 	RESULT setSyncMaster(int who);
-	RESULT start();
-	RESULT preroll();
-	RESULT freeze(int cont);
-	RESULT unfreeze();
-	RESULT setSinglePictureMode(int when);
-	RESULT setPictureSkipMode(int what);
-	RESULT setFastForward(int frames_to_skip);
-	RESULT setSlowMotion(int repeat);
-	RESULT setZoom(int what);
+	
+		/*
+		The following states exist:
+		
+		 - stop: data source closed, no playback
+		 - pause: data source active, decoder paused
+		 - play: data source active, decoder consuming
+		 - decoder fast forward: data source linear, decoder drops frames
+		 - trickmode, highspeed reverse: data source fast forwards / reverses, decoder just displays frames as fast as it can
+		 - slow motion: decoder displays frames multiple times
+		*/
+	enum {
+		stateStop,
+		statePause,
+		statePlay,
+		stateDecoderFastForward,
+		stateTrickmode,
+		stateSlowMotion
+	};
+	RESULT set(); /* just apply settings, keep state */
+	RESULT play(); /* -> play */
+	RESULT pause(); /* -> pause */
+	RESULT setFastForward(int frames_to_skip); /* -> decoder fast forward */
+	RESULT setSlowMotion(int repeat); /* -> slow motion **/
+	RESULT setTrickmode(); /* -> highspeed fast forward */
+
 	RESULT flush();
-	RESULT setTrickmode(int what);
 	RESULT showSinglePic(const char *filename);
 	RESULT setRadioPic(const std::string &filename);
 		/* what 0=auto, 1=video, 2=audio. */
diff --git a/lib/dvb/idvb.h b/lib/dvb/idvb.h
index cda05894..bd1c7035 100644
--- a/lib/dvb/idvb.h
+++ b/lib/dvb/idvb.h
@@ -662,37 +662,24 @@ public:
 		/** Set Sync mode to either audio or video master */
 	virtual RESULT setSyncMaster(int who)=0;
 
-		/** Apply settings with starting video */
-	virtual RESULT start()=0;
-		/** Apply settings but don't start yet */
-	virtual RESULT preroll()=0;
+		/** Apply settings but don't change state */
+	virtual RESULT set()=0;
+		/* all those apply settings, then transition to the given state */
 
-		/** Freeze frame. Either continue decoding (without display) or halt. */
-	virtual RESULT freeze(int cont)=0;
-		/** Continue after freeze. */
-	virtual RESULT unfreeze()=0;
+		/** play */
+	virtual RESULT play()=0;
+		/** Freeze frame. */
+	virtual RESULT pause()=0;
 
 		/** fast forward by skipping frames. 0 is disabled, 2 is twice-the-speed, ... */
 	virtual RESULT setFastForward(int skip=0)=0;
 
-		// stop on .. Picture
-	enum { spm_I, spm_Ref, spm_Any };
-		/** Stop on specific decoded picture. For I-Frame display. */
-	virtual RESULT setSinglePictureMode(int when)=0;
-
-	enum { pkm_B, pkm_PB };
-		/** Fast forward by skipping either B or P/B pictures */
-	virtual RESULT setPictureSkipMode(int what)=0;
-
 		/** Slow Motion by repeating pictures */
 	virtual RESULT setSlowMotion(int repeat)=0;
-	
-	enum { zoom_Normal, zoom_PanScan, zoom_Letterbox, zoom_Fullscreen };
-		/** Set Zoom. mode *must* be fitting. */
-	virtual RESULT setZoom(int what)=0;
-
-	virtual RESULT setTrickmode(int what) = 0;
 
+		/** Display any complete data as fast as possible */
+	virtual RESULT setTrickmode()=0;
+	
 	virtual RESULT getPTS(int what, pts_t &pts) = 0;
 
 	virtual RESULT showSinglePic(const char *filename) = 0;