diff options
Diffstat (limited to 'drivers/media/video/uvc')
| -rw-r--r-- | drivers/media/video/uvc/uvc_driver.c | 24 | ||||
| -rw-r--r-- | drivers/media/video/uvc/uvc_video.c | 17 |
2 files changed, 13 insertions, 28 deletions
diff --git a/drivers/media/video/uvc/uvc_driver.c b/drivers/media/video/uvc/uvc_driver.c index 507dc85646b2..34cd36037f11 100644 --- a/drivers/media/video/uvc/uvc_driver.c +++ b/drivers/media/video/uvc/uvc_driver.c @@ -289,10 +289,8 @@ static int uvc_parse_format(struct uvc_device *dev, struct uvc_format_desc *fmtdesc; struct uvc_frame *frame; const unsigned char *start = buffer; - unsigned char *_buffer; unsigned int interval; unsigned int i, n; - int _buflen; __u8 ftype; format->type = buffer[2]; @@ -413,20 +411,11 @@ static int uvc_parse_format(struct uvc_device *dev, buflen -= buffer[0]; buffer += buffer[0]; - /* Count the number of frame descriptors to test the bFrameIndex - * field when parsing the descriptors. We can't rely on the - * bNumFrameDescriptors field as some cameras don't initialize it - * properly. - */ - for (_buflen = buflen, _buffer = buffer; - _buflen > 2 && _buffer[2] == ftype; - _buflen -= _buffer[0], _buffer += _buffer[0]) - format->nframes++; - /* Parse the frame descriptors. Only uncompressed, MJPEG and frame * based formats have frame descriptors. */ while (buflen > 2 && buffer[2] == ftype) { + frame = &format->frame[format->nframes]; if (ftype != VS_FRAME_FRAME_BASED) n = buflen > 25 ? buffer[25] : 0; else @@ -441,16 +430,6 @@ static int uvc_parse_format(struct uvc_device *dev, return -EINVAL; } - if (buffer[3] - 1 >= format->nframes) { - uvc_trace(UVC_TRACE_DESCR, "device %d videostreaming" - "interface %d frame index %u out of range\n", - dev->udev->devnum, alts->desc.bInterfaceNumber, - buffer[3]); - return -EINVAL; - } - - frame = &format->frame[buffer[3] - 1]; - frame->bFrameIndex = buffer[3]; frame->bmCapabilities = buffer[4]; frame->wWidth = get_unaligned_le16(&buffer[5]); @@ -507,6 +486,7 @@ static int uvc_parse_format(struct uvc_device *dev, 10000000/frame->dwDefaultFrameInterval, (100000000/frame->dwDefaultFrameInterval)%10); + format->nframes++; buflen -= buffer[0]; buffer += buffer[0]; } diff --git a/drivers/media/video/uvc/uvc_video.c b/drivers/media/video/uvc/uvc_video.c index 6ce974d7362f..01b633c73480 100644 --- a/drivers/media/video/uvc/uvc_video.c +++ b/drivers/media/video/uvc/uvc_video.c @@ -65,7 +65,8 @@ static void uvc_fixup_video_ctrl(struct uvc_video_device *video, struct uvc_streaming_control *ctrl) { struct uvc_format *format; - struct uvc_frame *frame; + struct uvc_frame *frame = NULL; + unsigned int i; if (ctrl->bFormatIndex <= 0 || ctrl->bFormatIndex > video->streaming->nformats) @@ -73,11 +74,15 @@ static void uvc_fixup_video_ctrl(struct uvc_video_device *video, format = &video->streaming->format[ctrl->bFormatIndex - 1]; - if (ctrl->bFrameIndex <= 0 || - ctrl->bFrameIndex > format->nframes) - return; + for (i = 0; i < format->nframes; ++i) { + if (format->frame[i].bFrameIndex == ctrl->bFrameIndex) { + frame = &format->frame[i]; + break; + } + } - frame = &format->frame[ctrl->bFrameIndex - 1]; + if (frame == NULL) + return; if (!(format->flags & UVC_FMT_FLAG_COMPRESSED) || (ctrl->dwMaxVideoFrameSize == 0 && @@ -1089,7 +1094,7 @@ int uvc_video_init(struct uvc_video_device *video) /* Zero bFrameIndex might be correct. Stream-based formats (including * MPEG-2 TS and DV) do not support frames but have a dummy frame * descriptor with bFrameIndex set to zero. If the default frame - * descriptor is not found, use the first avalable frame. + * descriptor is not found, use the first available frame. */ for (i = format->nframes; i > 0; --i) { frame = &format->frame[i-1]; |