diff options
Diffstat (limited to 'drivers/media/video/gspca/tv8532.c')
| -rw-r--r-- | drivers/media/video/gspca/tv8532.c | 142 |
1 files changed, 34 insertions, 108 deletions
diff --git a/drivers/media/video/gspca/tv8532.c b/drivers/media/video/gspca/tv8532.c index 968a5911704..94163cceb28 100644 --- a/drivers/media/video/gspca/tv8532.c +++ b/drivers/media/video/gspca/tv8532.c @@ -30,15 +30,10 @@ MODULE_LICENSE("GPL"); struct sd { struct gspca_dev gspca_dev; /* !! must be the first item */ - int buflen; /* current length of tmpbuf */ - __u8 tmpbuf[352 * 288 + 10 * 288]; /* no protection... */ - __u8 tmpbuf2[352 * 288]; /* no protection... */ + __u16 brightness; + __u16 contrast; - unsigned short brightness; - unsigned short contrast; - - char packet; - char synchro; + __u8 packet; }; /* V4L2 controls supported by the driver */ @@ -78,7 +73,7 @@ static struct ctrl sd_ctrls[] = { }, }; -static struct v4l2_pix_format sif_mode[] = { +static const struct v4l2_pix_format sif_mode[] = { {176, 144, V4L2_PIX_FMT_SBGGR8, V4L2_FIELD_NONE, .bytesperline = 176, .sizeimage = 176 * 144, @@ -392,6 +387,8 @@ static void setbrightness(struct gspca_dev *gspca_dev) /* -- start the camera -- */ static int sd_start(struct gspca_dev *gspca_dev) { + struct sd *sd = (struct sd *) gspca_dev; + reg_w_1(gspca_dev, TV8532_AD_SLOPE, 0x32); reg_w_1(gspca_dev, TV8532_AD_BITCTRL, 0x00); tv_8532ReadRegisters(gspca_dev); @@ -443,6 +440,10 @@ static int sd_start(struct gspca_dev *gspca_dev) /************************************************/ tv_8532_PollReg(gspca_dev); reg_w_1(gspca_dev, TV8532_UDP_UPDATE, 0x00); /* 0x31 */ + + gspca_dev->empty_packet = 0; /* check the empty packets */ + sd->packet = 0; /* ignore the first packets */ + return 0; } @@ -451,111 +452,36 @@ static void sd_stopN(struct gspca_dev *gspca_dev) reg_w_1(gspca_dev, TV8532_GPIO_OE, 0x0b); } -static void tv8532_preprocess(struct gspca_dev *gspca_dev) -{ - struct sd *sd = (struct sd *) gspca_dev; -/* we should received a whole frame with header and EOL marker - * in gspca_dev->tmpbuf and return a GBRG pattern in gspca_dev->tmpbuf2 - * sequence 2bytes header the Alternate pixels bayer GB 4 bytes - * Alternate pixels bayer RG 4 bytes EOL */ - int width = gspca_dev->width; - int height = gspca_dev->height; - unsigned char *dst = sd->tmpbuf2; - unsigned char *data = sd->tmpbuf; - int i; - - /* precompute where is the good bayer line */ - if (((data[3] + data[width + 7]) >> 1) - + (data[4] >> 2) - + (data[width + 6] >> 1) >= ((data[2] + data[width + 6]) >> 1) - + (data[3] >> 2) - + (data[width + 5] >> 1)) - data += 3; - else - data += 2; - for (i = 0; i < height / 2; i++) { - memcpy(dst, data, width); - data += width + 3; - dst += width; - memcpy(dst, data, width); - data += width + 7; - dst += width; - } -} - static void sd_pkt_scan(struct gspca_dev *gspca_dev, struct gspca_frame *frame, /* target */ __u8 *data, /* isoc packet */ int len) /* iso packet length */ { struct sd *sd = (struct sd *) gspca_dev; - - if (data[0] != 0x80) { - sd->packet++; - if (sd->buflen + len > sizeof sd->tmpbuf) { - if (gspca_dev->last_packet_type != DISCARD_PACKET) { - PDEBUG(D_PACK, "buffer overflow"); - gspca_dev->last_packet_type = DISCARD_PACKET; - } - return; - } - memcpy(&sd->tmpbuf[sd->buflen], data, len); - sd->buflen += len; - return; - } - - /* here we detect 0x80 */ - /* counter is limited so we need few header for a frame :) */ - - /* header 0x80 0x80 0x80 0x80 0x80 */ - /* packet 00 63 127 145 00 */ - /* sof 0 1 1 0 0 */ - - /* update sequence */ - if (sd->packet == 63 || sd->packet == 127) - sd->synchro = 1; - - /* is there a frame start ? */ - if (sd->packet >= (gspca_dev->height >> 1) - 1) { - PDEBUG(D_PACK, "SOF > %d packet %d", sd->synchro, - sd->packet); - if (!sd->synchro) { /* start of frame */ - if (gspca_dev->last_packet_type == FIRST_PACKET) { - tv8532_preprocess(gspca_dev); - frame = gspca_frame_add(gspca_dev, - LAST_PACKET, - frame, sd->tmpbuf2, - gspca_dev->width * - gspca_dev->width); - } - gspca_frame_add(gspca_dev, FIRST_PACKET, - frame, data, 0); - memcpy(sd->tmpbuf, data, len); - sd->buflen = len; - sd->packet = 0; - return; - } - if (gspca_dev->last_packet_type != DISCARD_PACKET) { - PDEBUG(D_PACK, - "Warning wrong TV8532 frame detection %d", - sd->packet); - gspca_dev->last_packet_type = DISCARD_PACKET; - } - return; - } - - if (!sd->synchro) { - /* Drop packet frame corrupt */ - PDEBUG(D_PACK, "DROP SOF %d packet %d", - sd->synchro, sd->packet); - sd->packet = 0; - gspca_dev->last_packet_type = DISCARD_PACKET; - return; - } - sd->synchro = 1; - sd->packet++; - memcpy(&sd->tmpbuf[sd->buflen], data, len); - sd->buflen += len; + int packet_type0, packet_type1; + + packet_type0 = packet_type1 = INTER_PACKET; + if (gspca_dev->empty_packet) { + gspca_dev->empty_packet = 0; + sd->packet = gspca_dev->height / 2; + packet_type0 = FIRST_PACKET; + } else if (sd->packet == 0) + return; /* 2 more lines in 352x288 ! */ + sd->packet--; + if (sd->packet == 0) + packet_type1 = LAST_PACKET; + + /* each packet contains: + * - header 2 bytes + * - RG line + * - 4 bytes + * - GB line + * - 4 bytes + */ + gspca_frame_add(gspca_dev, packet_type0, + frame, data + 2, gspca_dev->width); + gspca_frame_add(gspca_dev, packet_type1, + frame, data + gspca_dev->width + 6, gspca_dev->width); } static void setcontrast(struct gspca_dev *gspca_dev) |