3 files changed, 33 insertions, 2 deletions

diff --git a/ipecamera/image.c b/ipecamera/image.c
index 8899627..969071d 100644
--- a/ipecamera/image.c
+++ b/ipecamera/image.c
@@ -38,6 +38,7 @@ struct ipecamera_s {
     pcilib_register_t n_lines_reg, line_reg;
     pcilib_register_t exposure_reg;
 
+    int started;
     int buffer_size;
     int buf_ptr;
     
@@ -140,6 +141,23 @@ void ipecamera_free(void *vctx) {
     }
 }
 
+int ipecamera_set_buffer_size(ipecamera_t *ctx, int size) {
+    if (ctx->started) {
+	pcilib_error("Can't change buffer size while grabbing");
+	return PCILIB_ERROR_INVALID_REQUEST;
+    }
+    
+    if (ctx->size < 1) {
+	pcilib_error("The buffer size is too small");
+	return PCILIB_ERROR_INVALID_REQUEST;
+    }
+
+    ctx->buffer_size = size;
+    
+    return 0;
+}
+
+
 int ipecamera_reset(void *vctx) {
     int err;
     pcilib_t *pcilib;
@@ -222,6 +240,11 @@ int ipecamera_start(void *vctx, pcilib_event_t event_mask, pcilib_callback_t cb,
 	return PCILIB_ERROR_NOTINITIALIZED;
     }
     
+    if (ctx->started) {
+	pcilib_error("IPECamera grabbing is already started");
+	return PCILIB_ERROR_INVALID_REQUEST;
+    }
+    
     ctx->cb = cb;
     ctx->cb_user = user;
     
@@ -429,6 +452,11 @@ int ipecamera_trigger(void *vctx, pcilib_event_t event, size_t trigger_size, voi
 	pcilib_error("IPECamera imaging is not initialized");
 	return PCILIB_ERROR_NOTINITIALIZED;
     }
+
+    if (!ctx->started) {
+	pcilib_error("Can't trigger while not grabbing is not started");
+	return PCILIB_ERROR_INVALID_REQUEST;
+    }
     
     err = ipecamera_get_image(ctx);
     if (!err) err = ctx->cb(event, ctx->event_id, ctx->cb_user);
diff --git a/ipecamera/image.h b/ipecamera/image.h
index ede964c..6b92524 100644
--- a/ipecamera/image.h
+++ b/ipecamera/image.h
@@ -6,8 +6,6 @@
 #include "ipecamera.h"
 #include "pcilib.h"
 
-typedef struct ipecamera_s ipecamera_t;
-
 void *ipecamera_init(pcilib_t *pcilib);
 void ipecamera_free(void *ctx);
 
diff --git a/ipecamera/ipecamera.h b/ipecamera/ipecamera.h
index d54dda2..49afe0c 100644
--- a/ipecamera/ipecamera.h
+++ b/ipecamera/ipecamera.h
@@ -1,6 +1,8 @@
 #ifndef _IPECAMERA_H
 #define _IPECAMERA_H
 
+typedef struct ipecamera_s ipecamera_t;
+
 typedef  struct {
     int bpp;			/*<< Bits per pixel (8, 16, or 32) as returned by IPECAMERA_IMAGE_DATA */
     int real_bpp;		/*<< Bits per pixel as returned by camera and IPECAMERA_PACKED_IMAGE */
@@ -20,4 +22,7 @@ typedef enum {
 typedef uint16_t ipecamera_change_mask_t;
 typedef uint16_t ipecamera_pixel_t;
 
+
+int ipecamera_set_buffer_size(ipecamera_t *ctx, int size);
+
 #endif /* _IPECAMERA_H */