Add a HACKING.asciidoc file

[libam7xxx.git] / src / am7xxx.h

diff --git a/src/am7xxx.h b/src/am7xxx.h
index 84a1efb..49510eb 100644 (file)
--- a/src/am7xxx.h
+++ b/src/am7xxx.h
@@ -1,10 +1,10 @@
 /* am7xxx - communication with AM7XXX based USB Pico Projectors and DPFs
  *
- * Copyright (C) 2011  Antonio Ospite <ospite@studenti.unina.it>
+ * Copyright (C) 2012  Antonio Ospite <ospite@studenti.unina.it>
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
+ * the Free Software Foundation, either version 2 of the License, or
  * (at your option) any later version.
  *
  * This program is distributed in the hope that it will be useful,
@@ -37,6 +37,7 @@ typedef enum {
 
 typedef enum {
        AM7XXX_IMAGE_FORMAT_JPEG = 1,
+       AM7XXX_IMAGE_FORMAT_NV12 = 2,
 } am7xxx_image_format;
 
 typedef enum {
@@ -46,6 +47,13 @@ typedef enum {
        AM7XXX_POWER_HIGH = 3,
 } am7xxx_power_mode;
 
+struct am7xxx_generic_header {
+       uint32_t field0;
+       uint32_t field1;
+       uint32_t field2;
+       uint32_t field3;
+};
+
 struct am7xxx_image_header {
        uint32_t format;
        uint32_t width;
@@ -69,6 +77,12 @@ struct am7xxx_power_header {
  * 04 00 00 00 00 0c ff ff 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  */
 
+/* The header size on the wire is known to be always 24 bytes, regardless of
+ * the memory configuration enforced by different architechtures or compilers
+ * for struct am7xxx_header
+ */
+#define AM7XXX_HEADER_WIRE_SIZE 24
+
 struct am7xxx_header {
        uint32_t packet_type;
        uint8_t unknown0;
@@ -76,6 +90,7 @@ struct am7xxx_header {
        uint8_t unknown2;
        uint8_t unknown3;
        union {
+               struct am7xxx_generic_header data;
                struct am7xxx_image_header image;
                struct am7xxx_power_header power;
        } header_data;