ST77xx memory corruption + mp3 sync using library + mutex for poll in stream() - release

components/display/ST77xx.c

@@ -90,7 +90,7 @@ static void Update16( struct GDS_Device* Device ) {
 			for (int i = FirstRow; i <= LastRow; i++) {
 				memcpy(optr, Private->Shadowbuffer + (i * Device->Width + FirstCol) * 2, ChunkSize);
 				optr += ChunkSize;
-				if (optr - Private->iRAM < PAGE_BLOCK && i < LastRow) continue;
+				if (optr - Private->iRAM <= (PAGE_BLOCK - ChunkSize) && i < LastRow) continue;
 				Device->WriteData(Device, Private->iRAM, optr - Private->iRAM);
 				optr = Private->iRAM;
 			}
@@ -157,7 +157,7 @@ static void Update24( struct GDS_Device* Device ) {
 			for (int i = FirstRow; i <= LastRow; i++) {
 				memcpy(optr, Private->Shadowbuffer + (i * Device->Width + FirstCol) * 3, ChunkSize);
 				optr += ChunkSize;
-				if (optr - Private->iRAM < PAGE_BLOCK && i < LastRow) continue;
+				if (optr - Private->iRAM <= (PAGE_BLOCK - ChunkSize) && i < LastRow) continue;
 				Device->WriteData(Device, Private->iRAM, optr - Private->iRAM);
 				optr = Private->iRAM;
 			}	

components/squeezelite/display.c

@@ -628,8 +628,9 @@ static void grfe_handler( u8_t *data, int len) {
 	
 	scroller.active = false;
 	
-	// visu has priority when full screen on small screens
-	if ((visu.mode & VISU_ESP32) && !visu.col && visu.row < displayer.height) {
+	// full screen artwork or for small screen, full screen visu has priority
+	if (((visu.mode & VISU_ESP32) && !visu.col && visu.row < displayer.height) ||
+		(artwork.enable && artwork.x == 0 && artwork.y == 0)) {
 		xSemaphoreGive(displayer.mutex);
 		return;
 	}	
@@ -751,8 +752,11 @@ static void grfg_handler(u8_t *data, int len) {
 	
 	LOG_DEBUG("gfrg s:%hu w:%hu (len:%u)", htons(pkt->screen), htons(pkt->width), len);
 
-	// on small screen, visu has priority when full screen	
-	if ((visu.mode & VISU_ESP32) && !visu.col && visu.row < displayer.height) return;
+	// full screen artwork or for small screen, visu has priority when full screen	
+	if (((visu.mode & VISU_ESP32) && !visu.col && visu.row < displayer.height) || 
+		(artwork.enable && artwork.x == 0 && artwork.y == 0)) {
+		return;
+	}	
 	
 	xSemaphoreTake(displayer.mutex, portMAX_DELAY);
 		
@@ -840,8 +844,10 @@ static void grfa_handler(u8_t *data, int len) {
  * Update visualization bars
  */
 static void visu_update(void) {
-	// no need to protect against no woning the display as we are playing	
-	if (pthread_mutex_trylock(&visu_export.mutex)) return;
+	// no update when artwork is full screen (but no need to protect against not owning the display as we are playing	
+	if ((artwork.enable && artwork.x == 0 && artwork.y == 0) || pthread_mutex_trylock(&visu_export.mutex)) {
+		return;
+	}	
 	
 	int mode = visu.mode & ~VISU_ESP32;
 				

components/squeezelite/mad.c

@@ -417,3 +417,4 @@ struct codec *register_mad(void) {
 	LOG_INFO("using mad to decode mp3");
 	return &ret;
 }
+

components/squeezelite/stream.c

@@ -45,6 +45,28 @@ struct buffer *streambuf = &buf;
 #define LOCK     mutex_lock(streambuf->mutex)
 #define UNLOCK   mutex_unlock(streambuf->mutex)
 
+/* 
+After a lot of hesitation, I've added that "poll mutex" to prevent
+socket from being allocated while we are still in poll(). The issue 
+happens is we have a close quickly followed by an open, we might still
+be in the poll() and simple OS fail as they re-allocate the same socket
+on which a thread is still waiting. 
+Ideally, you want to set the lock in the disconnect() but that would mean
+very often we'd have to always wait for the end of the poll(), i.e. up to
+100ms for nothing most of the time where if it is in the open(), it is 
+less elegant as closing a socket on which there is a poll() is not good 
+but it's more efficient as it is very rare that you'd have an open() less 
+then 100ms after a close()
+*/
+#if EMBEDDED
+static mutex_type poll_mutex;
+#define LOCK_L   mutex_lock(poll_mutex)
+#define UNLOCK_L mutex_unlock(poll_mutex)
+#else
+#define LOCK_L   
+#define UNLOCK_L 
+#endif
+
 static sockfd fd;
 
 struct streamstate stream;
@@ -187,6 +209,7 @@ static void *stream_thread() {
 
 		} else {
 
+			LOCK_L;
 			pollinfo.fd = fd;
 			pollinfo.events = POLLIN;
 			if (stream.state == SEND_HEADERS) {
@@ -198,6 +221,7 @@ static void *stream_thread() {
 		
 		if (_poll(ssl, &pollinfo, 100)) {
 
+			UNLOCK_L;	
 			LOCK;
 
 			// check socket has not been closed while in poll
@@ -350,7 +374,7 @@ static void *stream_thread() {
 			UNLOCK;
 			
 		} else {
-			
+			UNLOCK_L;
 			LOG_SDEBUG("poll timeout");
 		}
 	}
@@ -403,6 +427,9 @@ void stream_init(log_level level, unsigned stream_buf_size) {
 	*stream.header = '\0';
 
 	fd = -1;
+#if EMBEDDED	
+	mutex_create_p(poll_mutex);
+#endif	
 
 #if LINUX || FREEBSD
 	touch_memory(streambuf->buf, streambuf->size);
@@ -432,6 +459,9 @@ void stream_close(void) {
 #endif
 	free(stream.header);
 	buf_destroy(streambuf);
+#if EMBEDDED	
+	mutex_destroy(poll_mutex);
+#endif	
 }
 
 void stream_file(const char *header, size_t header_len, unsigned threshold) {
@@ -473,7 +503,9 @@ void stream_file(const char *header, size_t header_len, unsigned threshold) {
 void stream_sock(u32_t ip, u16_t port, const char *header, size_t header_len, unsigned threshold, bool cont_wait) {
 	struct sockaddr_in addr;
 
+	LOCK_L;
 	int sock = socket(AF_INET, SOCK_STREAM, 0);
+	UNLOCK_L;
 
 	if (sock < 0) {
 		LOG_ERROR("failed to create socket");