diff options
Diffstat (limited to 'drivers/media/video/em28xx')
| -rw-r--r-- | drivers/media/video/em28xx/em28xx-video.c | 61 |
1 files changed, 39 insertions, 22 deletions
diff --git a/drivers/media/video/em28xx/em28xx-video.c b/drivers/media/video/em28xx/em28xx-video.c index 0fe20110bfd6..b6ac99de97d2 100644 --- a/drivers/media/video/em28xx/em28xx-video.c +++ b/drivers/media/video/em28xx/em28xx-video.c @@ -203,12 +203,6 @@ static void em28xx_copy_video(struct em28xx *dev, if (dma_q->pos + len > buf->vb.size) len = buf->vb.size - dma_q->pos; - if (p[0] != 0x88 && p[0] != 0x22) { - em28xx_isocdbg("frame is not complete\n"); - len += 4; - } else - p += 4; - startread = p; remain = len; @@ -309,14 +303,6 @@ static void em28xx_copy_vbi(struct em28xx *dev, if (dma_q->pos + len > buf->vb.size) len = buf->vb.size - dma_q->pos; - if ((p[0] == 0x33 && p[1] == 0x95) || - (p[0] == 0x88 && p[1] == 0x88)) { - /* Header field, advance past it */ - p += 4; - } else { - len += 4; - } - startread = p; startwrite = outp + dma_q->pos; @@ -507,8 +493,15 @@ static inline int em28xx_isoc_copy(struct em28xx *dev, struct urb *urb) dma_q->pos = 0; } - if (buf != NULL) + if (buf != NULL) { + if (p[0] != 0x88 && p[0] != 0x22) { + em28xx_isocdbg("frame is not complete\n"); + len += 4; + } else { + p += 4; + } em28xx_copy_video(dev, dma_q, buf, p, outp, len); + } } return rc; } @@ -555,8 +548,7 @@ static inline int em28xx_isoc_copy_vbi(struct em28xx *dev, struct urb *urb) continue; } - len = urb->iso_frame_desc[i].actual_length - 4; - + len = urb->iso_frame_desc[i].actual_length; if (urb->iso_frame_desc[i].actual_length <= 0) { /* em28xx_isocdbg("packet %d is empty",i); - spammy */ continue; @@ -577,6 +569,17 @@ static inline int em28xx_isoc_copy_vbi(struct em28xx *dev, struct urb *urb) dev->vbi_read = 0; em28xx_isocdbg("VBI START HEADER!!!\n"); dev->cur_field = p[2]; + p += 4; + len -= 4; + } else if (p[0] == 0x88 && p[1] == 0x88 && + p[2] == 0x88 && p[3] == 0x88) { + /* continuation */ + p += 4; + len -= 4; + } else if (p[0] == 0x22 && p[1] == 0x5a) { + /* start video */ + p += 4; + len -= 4; } vbi_size = dev->vbi_width * dev->vbi_height; @@ -631,9 +634,6 @@ static inline int em28xx_isoc_copy_vbi(struct em28xx *dev, struct urb *urb) if (dev->capture_type == 1) { dev->capture_type = 2; - em28xx_isocdbg("Video frame %d, length=%i, %s\n", p[2], - len, (p[2] & 1) ? "odd" : "even"); - if (dev->progressive || !(dev->cur_field & 1)) { if (buf != NULL) buffer_filled(dev, dma_q, buf); @@ -652,8 +652,25 @@ static inline int em28xx_isoc_copy_vbi(struct em28xx *dev, struct urb *urb) dma_q->pos = 0; } - if (buf != NULL && dev->capture_type == 2) - em28xx_copy_video(dev, dma_q, buf, p, outp, len); + + if (buf != NULL && dev->capture_type == 2) { + if (len > 4 && p[0] == 0x88 && p[1] == 0x88 && + p[2] == 0x88 && p[3] == 0x88) { + p += 4; + len -= 4; + } + if (len > 4 && p[0] == 0x22 && p[1] == 0x5a) { + em28xx_isocdbg("Video frame %d, len=%i, %s\n", + p[2], len, (p[2] & 1) ? + "odd" : "even"); + p += 4; + len -= 4; + } + + if (len > 0) + em28xx_copy_video(dev, dma_q, buf, p, outp, + len); + } } return rc; } |