![](/media/cache/profiles/45ab12afa05e563bb484781693dffc87.50x50_q85.jpg)
modify for C210 webcam and Startboard Orange.
Dependencies: TextLCD USBHost mbed
Fork of USBHostC270_example by
Norimasa Okamoto さんの http://mbed.org/users/va009039/code/USBHostC270_example/ を C210 webcam と StarBoard Orange での SD カード保存用に変更。
USBHostC270/decodeMJPEG/decodeMJPEG.cpp
- Committer:
- masato
- Date:
- 2013-03-19
- Revision:
- 12:c827ed52021d
- Parent:
- 9:fecabade834a
File content as of revision 12:c827ed52021d:
// 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; } }