Support CMOSIS bug resulting in missing payload

2 files changed, 8 insertions, 3 deletions

diff --git a/private.h b/private.h
index a0611f3..ff36e92 100644
--- a/private.h
+++ b/private.h
@@ -5,9 +5,9 @@
 #include <pcilib/model.h>
 #include "ipecamera.h"
 
-//#define IPECAMERA_BUG_EXTRA_DATA
-#define IPECAMERA_BUG_MULTIFRAME_PACKETS	//**< this is by design, start of packet comes directly after the end of last one in streaming mode */
-//#define IPECAMERA_BUG_INCOMPLETE_PACKETS
+#define IPECAMERA_BUG_MISSING_PAYLOAD		//**< CMOSIS fails to provide a first payload for each frame, therefore the frame is 32 bit shorter */
+#define IPECAMERA_BUG_MULTIFRAME_PACKETS	//**< This is by design, start of packet comes directly after the end of last one in streaming mode */
+//#define IPECAMERA_BUG_INCOMPLETE_PACKETS	//**< Support incomplete packets, i.e. check for frame magic even if full frame size is not reached yet (slow) */
 #define IPECAMERA_BUG_POSTPONED_READ
 #define IPECAMERA_DEBUG_BROKEN_FRAMES		"/mnt/frames"
 //#define IPECAMERA_DEBUG_RAW_PACKETS		"/mnt/frames"
diff --git a/reader.c b/reader.c
index db700cd..63806f1 100644
--- a/reader.c
+++ b/reader.c
@@ -38,6 +38,11 @@ int ipecamera_compute_buffer_size(ipecamera_t *ctx, size_t lines) {
 	raw_size = lines * line_size;
 	raw_size *= 16 / ctx->cmosis_outputs;
 	raw_size += header_size  + footer_size;
+
+#ifdef IPECAMERA_BUG_MISSING_PAYLOAD
+	    // As I understand, the first 32-byte packet is missing, so we need to substract 32
+	raw_size -= 32;
+#endif /* IPECAMERA_BUG_MISSING_PAYLOAD */
     }
 
     padded_blocks = raw_size / IPECAMERA_DMA_PACKET_LENGTH + ((raw_size % IPECAMERA_DMA_PACKET_LENGTH)?1:0);