- 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 */
- /* empty 1 0 0 1 1 */
-
- /* update sequence */
- if (sd->packet == 63 || sd->packet == 127)
- gspca_dev->empty_packet = 0;
-
- /* is there a frame start ? */
- /* (each packet is 2 lines plus 10 bytes) */
- if (sd->packet >= (gspca_dev->height >> 1) - 1) {
- PDEBUG(D_PACK, "empty %d packet %d",
- gspca_dev->empty_packet, sd->packet);
- if (gspca_dev->empty_packet) { /* 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->height *
- 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;
- }
-