This patch implements changing resolution in zr364xx_vidioc_s_fmt_vid_cap for zr364xx driver. This version is synced with v4l-dvb as of 20/Jul/2009. Tested with Creative PC-CAM 880.
OBS: I had to increase MAX_FRAME_SIZE to prevent a hard crash in my notebook (caps lock blinking) when testing with mplayer, which automatically sets resolution to the maximum (640x480). Maybe we should add code to auto-detect frame size to prevent this kind of crash in the future. Signed-off-by: Lamarque V. Souza <lamar...@gmail.com> --- diff -r 1cb6f19d2c9d linux/drivers/media/video/zr364xx.c --- a/linux/drivers/media/video/zr364xx.c Sun Jul 19 18:03:23 2009 -0300 +++ b/linux/drivers/media/video/zr364xx.c Mon Jul 20 20:20:21 2009 -0300 @@ -43,14 +43,14 @@ /* Version Information */ #define DRIVER_VERSION "v0.73" -#define ZR364_VERSION_CODE KERNEL_VERSION(0, 7, 3) +#define ZR364XX_VERSION_CODE KERNEL_VERSION(0, 7, 3) #define DRIVER_AUTHOR "Antoine Jacquet, http://royale.zerezo.com/"; #define DRIVER_DESC "Zoran 364xx" /* Camera */ #define FRAMES 1 -#define MAX_FRAME_SIZE 100000 +#define MAX_FRAME_SIZE 200000 #define BUFFER_SIZE 0x1000 #define CTRL_TIMEOUT 500 @@ -734,7 +734,7 @@ strlcpy(cap->card, cam->udev->product, sizeof(cap->card)); strlcpy(cap->bus_info, dev_name(&cam->udev->dev), sizeof(cap->bus_info)); - cap->version = ZR364_VERSION_CODE; + cap->version = ZR364XX_VERSION_CODE; cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_READWRITE | V4L2_CAP_STREAMING; @@ -874,9 +874,14 @@ return -EINVAL; } + if (!(f->fmt.pix.width == 160 && f->fmt.pix.height == 120) && + !(f->fmt.pix.width == 640 && f->fmt.pix.height == 480)) { + f->fmt.pix.width = 320; + f->fmt.pix.height = 240; + } + f->fmt.pix.field = V4L2_FIELD_NONE; - f->fmt.pix.width = cam->width; - f->fmt.pix.height = cam->height; + f->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; f->fmt.pix.bytesperline = f->fmt.pix.width * 2; f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline; f->fmt.pix.colorspace = 0; @@ -907,7 +912,6 @@ return 0; } -/* Lamarque TODO: implement changing resolution on the fly */ static int zr364xx_vidioc_s_fmt_vid_cap(struct file *file, void *priv, struct v4l2_format *f) { @@ -915,6 +919,7 @@ struct videobuf_queue *q = &cam->vb_vidq; char pixelformat_name[5]; int ret = zr364xx_vidioc_try_fmt_vid_cap(file, cam, f); + int i; if (ret < 0) return ret; @@ -927,15 +932,55 @@ goto out; } - f->fmt.pix.field = V4L2_FIELD_NONE; - f->fmt.pix.width = cam->width; - f->fmt.pix.height = cam->height; + if (res_check(cam)) { + DBG("%s can't change format after started\n", __func__); + ret = -EBUSY; + goto out; + } + + cam->width = f->fmt.pix.width; + cam->height = f->fmt.pix.height; + dev_info(&cam->udev->dev, "%s: %dx%d mode selected\n", __func__, + cam->width, cam->height); f->fmt.pix.bytesperline = f->fmt.pix.width * 2; f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline; f->fmt.pix.colorspace = 0; f->fmt.pix.priv = 0; cam->vb_vidq.field = f->fmt.pix.field; cam->mode.color = V4L2_PIX_FMT_JPEG; + + if (f->fmt.pix.width == 160 && f->fmt.pix.height == 120) + mode = 1; + else if (f->fmt.pix.width == 640 && f->fmt.pix.height == 480) + mode = 2; + else + mode = 0; + + m0d1[0] = mode; + m1[2].value = 0xf000 + mode; + m2[1].value = 0xf000 + mode; + header2[437] = cam->height / 256; + header2[438] = cam->height % 256; + header2[439] = cam->width / 256; + header2[440] = cam->width % 256; + + for (i = 0; init[cam->method][i].size != -1; i++) { + ret = + send_control_msg(cam->udev, 1, init[cam->method][i].value, + 0, init[cam->method][i].bytes, + init[cam->method][i].size); + if (ret < 0) { + dev_err(&cam->udev->dev, + "error during resolution change sequence: %d\n", i); + goto out; + } + } + + /* Added some delay here, since opening/closing the camera quickly, + * like Ekiga does during its startup, can crash the webcam + */ + mdelay(100); + cam->skip = 2; ret = 0; out: @@ -1123,6 +1168,7 @@ cam->buffer.frame[j].ulState = ZR364XX_READ_IDLE; cam->buffer.frame[j].cur_size = 0; } + cam->b_acquire = 1; return 0; } @@ -1165,7 +1211,6 @@ res = videobuf_streamon(&cam->vb_vidq); if (res == 0) { zr364xx_start_acquire(cam); - cam->b_acquire = 1; } else { res_free(cam); } -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
