Fix bug: 100% cpu use with plugins like mp3.

ChangeLog

@@ -1,6 +1,7 @@
 User johns
 Date:
 
+    Fix bug: 100% cpu use with plugins like mp3.
     Wakeup display thread on channel switch, osd can now be shown without
     video.
     Makes 60Hz display mode configurable with setup.conf.

softhddev.c

@@ -75,6 +75,8 @@ static AudioDecoder *MyAudioDecoder;	///< audio decoder
 static enum CodecID AudioCodecID;	///< current codec id
 static int AudioChannelID;		///< current audio channel id
 
+    /// Minimum free space in audio buffer 8 packets for 8 channels
+#define AUDIO_MIN_BUFFER_FREE (3072 * 8 * 8)
 #define AUDIO_BUFFER_SIZE (512 * 1024)	///< audio PES buffer default size
 static AVPacket AudioAvPkt[1];		///< audio a/v packet
 
@@ -864,7 +866,7 @@ int PlayAudio(const uint8_t * data, int size, uint8_t id)
 	NewAudioStream = 0;
     }
     // Don't overrun audio buffers on replay
-    if (AudioFreeBytes() < 3072 * 8 * 8) {	// 8 channels 8 packets
+    if (AudioFreeBytes() < AUDIO_MIN_BUFFER_FREE) {
 	return 0;
     }
     // PES header 0x00 0x00 0x01 ID
@@ -1058,7 +1060,7 @@ int PlayTsAudio(const uint8_t * data, int size)
 	return size;
     }
     // Don't overrun audio buffers on replay
-    if (AudioFreeBytes() < 3072 * 8 * 8) {	// 8 channels 8 packets
+    if (AudioFreeBytes() < AUDIO_MIN_BUFFER_FREE) {
 	return 0;
     }
 
@@ -1827,7 +1829,7 @@ uint8_t *GrabImage(int *size, int jpeg, int quality, int width, int height)
 /**
 **	Set play mode, called on channel switch.
 */
-void SetPlayMode(void)
+int SetPlayMode(int play_mode)
 {
     if (ConfigStartSuspended) {		// ignore first call, if start suspended
 	ConfigStartSuspended = 0;
@@ -1835,18 +1837,23 @@ void SetPlayMode(void)
     }
     Resume();
     VideoDisplayWakeup();
-    if (MyVideoDecoder) {
+    if (MyVideoDecoder) {		// tell video parser we have new stream
 	if (VideoCodecID != CODEC_ID_NONE) {
 	    NewVideoStream = 1;
 	    VideoSwitch = GetMsTicks();
 	}
     }
-    if (MyAudioDecoder) {
+    if (MyAudioDecoder) {		// tell audio parser we have new stream
 	if (AudioCodecID != CODEC_ID_NONE) {
 	    NewAudioStream = 1;
 	}
     }
+    if (play_mode == 2 || play_mode == 3 ) {
+	Debug(3, "softhddev: FIXME: audio only, silence video errors\n");
+    }
     Play();
+
+    return 1;
 }
 
 /**
@@ -1990,11 +1997,13 @@ void StillPicture(const uint8_t * data, int size)
 int Poll(int timeout)
 {
     // buffers are too full
-    if (atomic_read(&VideoPacketsFilled) >= VIDEO_PACKET_MAX * 2 / 3) {
+    if ( atomic_read(&VideoPacketsFilled) >= VIDEO_PACKET_MAX * 2 / 3
+	|| AudioFreeBytes() < AUDIO_MIN_BUFFER_FREE * 2) {
 	if (timeout) {			// let display thread work
 	    usleep(timeout * 1000);
 	}
-	return atomic_read(&VideoPacketsFilled) < VIDEO_PACKET_MAX * 2 / 3;
+	return atomic_read(&VideoPacketsFilled) < VIDEO_PACKET_MAX * 2 / 3
+	    && AudioFreeBytes() > AUDIO_MIN_BUFFER_FREE;
     }
     return 1;
 }

softhddev.h

@@ -50,7 +50,7 @@ extern "C"
     extern uint8_t *GrabImage(int *, int, int, int, int);
 
     /// C plugin set play mode
-    extern void SetPlayMode(void);
+    extern int SetPlayMode(int);
     /// C plugin set trick speed
     extern void TrickSpeed(int);
     /// C plugin clears all video and audio data from the device

softhddevice.cpp

@@ -295,7 +295,7 @@ void cSoftOsd::Flush(void)
 	    }
 #ifdef DEBUG
 	    if (w > bitmap->Width() || h > bitmap->Height()) {
-		esyslog(tr("softhddev: dirty area too big\n"));
+		esyslog(tr("[softhddev]: dirty area too big\n"));
 		abort();
 	    }
 #endif
@@ -742,7 +742,7 @@ static void HandleHotkey(int code)
 	    CodecSetAudioPassthrough(ConfigAudioPassthrough ^= 1);
 	    break;
 	default:
-	    esyslog(tr("softhddev: hot key %d is not supported\n"), code);
+	    esyslog(tr("[softhddev]: hot key %d is not supported\n"), code);
 	    break;
     }
 }
@@ -954,8 +954,8 @@ bool cSoftHdDevice::SetPlayMode(ePlayMode play_mode)
 	    dsyslog("[softhddev] playmode not implemented... %d\n", play_mode);
 	    break;
     }
-    ::SetPlayMode();
-    return true;
+
+    return ::SetPlayMode(play_mode);
 }
 
 /**