Small bug fixes

Processing more than one image at once didn't work (quite bodgey)
MCIR would run even without a map
Error handling for map/raw images that don't exist

dsp.c

@@ -210,13 +210,15 @@ int getpixelv(float *pvbuff, int count) {
 
 // Get an entire row of pixels, aligned with sync markers
 // FIXME: skips noisy lines with no findable sync marker
-int getpixelrow(float *pixelv, int nrow, int *zenith) {
+int getpixelrow(float *pixelv, int nrow, int *zenith, int reset) {
 	static float pixels[PixelLine + SyncFilterLen];
 	static int npv;
 	static int synced = 0;
 	static double max = 0.0;
 	static double minDoppler = 100;
 
+	if(reset) synced = 0;
+
 	double corr, ecorr, lcorr;
 	int res;
 

main.c

@@ -32,7 +32,7 @@
 
 // DSP
 extern int init_dsp(double F);
-extern int getpixelrow(float *pixelv, int nrow, int *zenith);
+extern int getpixelrow(float *pixelv, int nrow, int *zenith, int reset);
 
 // I/O
 extern int readRawImage(char *filename, float **prow, int *nrow);
@@ -156,7 +156,7 @@ static int processAudio(char *filename, options_t *opts){
 		// Read PNG into image buffer
 		printf("Reading %s\n", filename);
 		if(readRawImage(filename, img.prow, &img.nrow) == 0){
-			fprintf(stderr, "Skipping %s; see above.\n", img.name);
+			fprintf(stderr, "Skipping %s\n", img.name);
 			return 0;
 		}
 	}else{
@@ -171,7 +171,7 @@ static int processAudio(char *filename, options_t *opts){
 			img.prow[img.nrow] = (float *) malloc(sizeof(float) * 2150);
 
 			// Write into memory and break the loop when there are no more samples to read
-			if (getpixelrow(img.prow[img.nrow], img.nrow, &zenith) == 0)
+			if (getpixelrow(img.prow[img.nrow], img.nrow, &zenith, (img.nrow == 0)) == 0)
 				break;
 
 			if(opts->realtime) pushRow(img.prow[img.nrow], IMG_WIDTH);

pngio.c

@@ -33,6 +33,10 @@ extern rgb_t RGBcomposite(rgb_t top, float top_a, rgb_t bottom, float bottom_a);
 
 int mapOverlay(char *filename, rgb_t **crow, int nrow, int zenith, int MCIR) {
 	FILE *fp = fopen(filename, "rb");
+	if(!fp) {
+		fprintf(stderr, "Cannot open %s\n", filename);
+		return 0;
+	}
 
 	// Create reader
 	png_structp png = png_create_read_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
@@ -133,6 +137,10 @@ int mapOverlay(char *filename, rgb_t **crow, int nrow, int zenith, int MCIR) {
 
 int readRawImage(char *filename, float **prow, int *nrow) {
 	FILE *fp = fopen(filename, "r");
+	if(!fp) {
+		fprintf(stderr, "Cannot open %s\n", filename);
+		return 0;
+	}
 
 	// Create reader
 	png_structp png = png_create_read_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
@@ -205,7 +213,7 @@ int ImageOut(options_t *opts, image_t *img, int offset, int width, char *desc, c
 	FILE *pngfile;
 
 	// Reduce the width of the image to componsate for the missing telemetry
-	int fc = strcmp(desc, "False Color") == 0;
+	int fc = (chid[0] == 'c');
 	int greyscale = 0;
 	int skiptele = 0;
 	if(opts->effects != NULL && CONTAINS(opts->effects, 't')){
@@ -227,7 +235,7 @@ int ImageOut(options_t *opts, image_t *img, int offset, int width, char *desc, c
 		return 0;
 	}
 
-	if(palette == NULL && !CONTAINS(opts->effects, 'p') && !fc && opts->map[0] == '\0' && strcmp(chid, "MCIR") != 0){
+	if(palette == NULL && !CONTAINS(opts->effects, 'p') && !fc && opts->map[0] == '\0' && chid[0] != 'm'){
 		greyscale = 1;
 
 		// Greyscale image
@@ -281,11 +289,11 @@ int ImageOut(options_t *opts, image_t *img, int offset, int width, char *desc, c
 
 	// Map stuff
 	if(opts->map != NULL && opts->map[0] != '\0'){
-		if(mapOverlay(opts->map, crow, img->nrow, zenith, strcmp(desc, "MCIR") == 0) == 0){
-			fprintf(stderr, "Skipping MCIR generation; see above.\n");
+		if(mapOverlay(opts->map, crow, img->nrow, zenith, (chid[0] == 'm')) == 0){
+			fprintf(stderr, "Skipping MCIR generation.\n");
 			return 0;
 		}
-	}else if(strcmp(chid, "MCIR") == 0){
+	}else if(chid[0] == 'm'){
 		fprintf(stderr, "Skipping MCIR generation; no map provided.\n");
 		return 0;
 	}