nikos chalikias
/
n-bed-USBHostC270_example
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Fork of
USBHostC270_example
by 
Norimasa Okamoto
Diff: USBHostC270/decodeMJPEG/decodeMJPEG.cpp
- Revision:
- 9:fecabade834a
diff -r 758190c6c455 -r fecabade834a USBHostC270/decodeMJPEG/decodeMJPEG.cpp
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/USBHostC270/decodeMJPEG/decodeMJPEG.cpp Sat Mar 16 13:07:55 2013 +0000
@@ -0,0 +1,180 @@
+// decodeMJPEG.cpp 2012/12/8
+// decode motion-jpeg to jpeg
+#include "mbed.h"
+#include "decodeMJPEG.h"
+
+#define MARK_SOF0 0xc0
+#define MARK_DHT 0xc4
+#define MARK_RST0 0xd0
+#define MARK_RST7 0xd7
+#define MARK_SOI 0xd8
+#define MARK_EOI 0xd9
+#define MARK_SOS 0xda
+#define MARK_DQT 0xdb
+#define MARK_DRI 0xdd
+#define MARK_APP 0xe0
+
+#define SEQ_INIT 0
+#define SEQ_SOI 1
+#define SEQ_FRAME 2
+#define SEQ_MARK 3
+#define SEQ_SEG_LEN 4
+#define SEQ_SEG_LEN2 5
+#define SEQ_SEG_BODY 6
+#define SEQ_SOS 7
+#define SEQ_SOS2 8
+
+static const uint8_t dht[] = {
+0xFF,0xC4,0x01,0xA2,0x00,0x00,0x01,0x05,0x01,0x01,0x01,0x01,0x01,0x01,0x00,0x00,
+0x00,0x00,0x00,0x00,0x00,0x00,0x01,0x02,0x03,0x04,0x05,0x06,0x07,0x08,0x09,0x0A,
+0x0B,0x01,0x00,0x03,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x00,0x00,0x00,
+0x00,0x00,0x00,0x01,0x02,0x03,0x04,0x05,0x06,0x07,0x08,0x09,0x0A,0x0B,0x10,0x00,
+0x02,0x01,0x03,0x03,0x02,0x04,0x03,0x05,0x05,0x04,0x04,0x00,0x00,0x01,0x7D,0x01,
+0x02,0x03,0x00,0x04,0x11,0x05,0x12,0x21,0x31,0x41,0x06,0x13,0x51,0x61,0x07,0x22,
+0x71,0x14,0x32,0x81,0x91,0xA1,0x08,0x23,0x42,0xB1,0xC1,0x15,0x52,0xD1,0xF0,0x24,
+0x33,0x62,0x72,0x82,0x09,0x0A,0x16,0x17,0x18,0x19,0x1A,0x25,0x26,0x27,0x28,0x29,
+0x2A,0x34,0x35,0x36,0x37,0x38,0x39,0x3A,0x43,0x44,0x45,0x46,0x47,0x48,0x49,0x4A,
+0x53,0x54,0x55,0x56,0x57,0x58,0x59,0x5A,0x63,0x64,0x65,0x66,0x67,0x68,0x69,0x6A,
+0x73,0x74,0x75,0x76,0x77,0x78,0x79,0x7A,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,
+0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,
+0xA9,0xAA,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xC2,0xC3,0xC4,0xC5,0xC6,
+0xC7,0xC8,0xC9,0xCA,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xE1,0xE2,0xE3,
+0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,
+0xFA,0x11,0x00,0x02,0x01,0x02,0x04,0x04,0x03,0x04,0x07,0x05,0x04,0x04,0x00,0x01,
+0x02,0x77,0x00,0x01,0x02,0x03,0x11,0x04,0x05,0x21,0x31,0x06,0x12,0x41,0x51,0x07,
+0x61,0x71,0x13,0x22,0x32,0x81,0x08,0x14,0x42,0x91,0xA1,0xB1,0xC1,0x09,0x23,0x33,
+0x52,0xF0,0x15,0x62,0x72,0xD1,0x0A,0x16,0x24,0x34,0xE1,0x25,0xF1,0x17,0x18,0x19,
+0x1A,0x26,0x27,0x28,0x29,0x2A,0x35,0x36,0x37,0x38,0x39,0x3A,0x43,0x44,0x45,0x46,
+0x47,0x48,0x49,0x4A,0x53,0x54,0x55,0x56,0x57,0x58,0x59,0x5A,0x63,0x64,0x65,0x66,
+0x67,0x68,0x69,0x6A,0x73,0x74,0x75,0x76,0x77,0x78,0x79,0x7A,0x82,0x83,0x84,0x85,
+0x86,0x87,0x88,0x89,0x8A,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0xA2,0xA3,
+0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,
+0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,
+0xD9,0xDA,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xF2,0xF3,0xF4,0xF5,0xF6,
+0xF7,0xF8,0xF9,0xFA,
+};
+
+decodeMJPEG::decodeMJPEG()
+{
+ m_seq = SEQ_INIT;
+}
+
+void decodeMJPEG::inputPacket(const uint8_t* buf, int len)
+{
+ for(int i = 12; i < len; i++) {
+ input(buf[i]);
+ }
+}
+
+void decodeMJPEG::input(uint8_t c)
+{
+ switch(m_seq) {
+ case SEQ_INIT:
+ if (c == 0xff) {
+ m_seq = SEQ_SOI;
+ }
+ break;
+ case SEQ_SOI:
+ if (c == MARK_SOI) {
+ outputJPEG(0xff, JPEG_START); // start
+ outputJPEG(c);
+ m_bDHT = false;
+ m_seq = SEQ_FRAME;
+ } else {
+ m_seq = SEQ_INIT;
+ }
+ break;
+ case SEQ_FRAME:
+ if (c == 0xff) {
+ m_seq = SEQ_MARK;
+ } else {
+ m_seq = SEQ_INIT;
+ }
+ break;
+ case SEQ_MARK:
+ if (c == MARK_SOI || c == MARK_EOI || c == 0x00) {
+ m_seq = SEQ_INIT;
+ break;
+ }
+ m_mark = c;
+ m_seq = SEQ_SEG_LEN;
+ break;
+ case SEQ_SEG_LEN:
+ m_seg_len = c;
+ m_seq = SEQ_SEG_LEN2;
+ break;
+ case SEQ_SEG_LEN2:
+ m_seg_len <<= 8;
+ m_seg_len |= c;
+ m_seg_len -= 2;
+ m_seg_pos = 0;
+ m_seq = SEQ_SEG_BODY;
+ if (m_mark == MARK_SOS) {
+ if (m_bDHT == false) {
+ for(int i = 0; i < sizeof(dht); i++) {
+ outputJPEG(dht[i]);
+ }
+ }
+ m_output_desable = false;
+ } else if (m_mark == MARK_DHT) {
+ m_bDHT = true;
+ m_output_desable = false;
+ } else {
+ m_output_desable = false;
+ }
+ if (!m_output_desable) {
+ outputJPEG(0xff);
+ outputJPEG(m_mark);
+ outputJPEG((m_seg_len+2) >> 8);
+ outputJPEG((m_seg_len+2) & 0xff);
+ }
+ break;
+ case SEQ_SEG_BODY:
+ if (!m_output_desable) {
+ outputJPEG(c);
+ }
+ if (++m_seg_pos < m_seg_len) {
+ break;
+ }
+ if (m_mark == MARK_SOS) {
+ m_seq = SEQ_SOS;
+ break;
+ }
+ m_seq = SEQ_FRAME;
+ break;
+ case SEQ_SOS:
+ if (c == 0xff) {
+ m_seq = SEQ_SOS2;
+ break;
+ }
+ outputJPEG(c);
+ break;
+ case SEQ_SOS2:
+ if (c == 0x00) {
+ outputJPEG(0xff);
+ outputJPEG(0x00);
+ m_seq = SEQ_SOS;
+ break;
+ } else if (c >= MARK_RST0 && c <= MARK_RST7) {
+ outputJPEG(0xff);
+ outputJPEG(c);
+ m_seq = SEQ_SOS;
+ break;
+ } else if (c == MARK_EOI) {
+ outputJPEG(0xff);
+ outputJPEG(c, JPEG_END);
+ m_seq = SEQ_INIT;
+ break;
+ } else if (c == MARK_SOI) {
+ outputJPEG(0xff);
+ outputJPEG(c);
+ m_seq = SEQ_INIT;
+ break;
+ }
+ m_seq = SEQ_INIT;
+ break;
+ default:
+ m_seq = SEQ_INIT;
+ break;
+ }
+}