Re: [PATCH v7 2/9] media: vivid: Convert to v4l2_ext_pix_format
From: Randy Li
Date: Fri Jul 28 2023 - 14:41:05 EST
On 2023/7/28 15:22, Tomasz Figa wrote:
On Fri, Jul 21, 2023 at 5:10 AM Nicolas Dufresne <nicolas@xxxxxxxxxxxx> wrote:
Le mardi 18 juillet 2023 à 00:00 +0800, Randy Li a écrit :
On 2023/7/13 18:39, Tomasz Figa wrote:
On Mon, Feb 06, 2023 at 12:33:01PM +0800, ayaka wrote:
From: Helen Koike <helen.koike@xxxxxxxxxxxxx>
Simplify Multi/Single planer API handling by converting to v4l2_ext_pix_format.
Duplicate v4l2_ioctl_ops for touch devices. This is done to force the
framework to use the ext hooks when the classic Api is used from
userspace in Vid devices, and to keep touch devices with classic hook.
Signed-off-by: Boris Brezillon <boris.brezillon@xxxxxxxxxxxxx>
Signed-off-by: Helen Koike <helen.koike@xxxxxxxxxxxxx>
---
Changes in v7:
- Force the userspace using the new APIs to operate non-touch drivers.
The primary objective of Linux development is not to break the
userspace. We can't just remove the old API, especially not from
existing drivers.
Maybe I should create a new virtual driver here? It is impossible to
support the new fourcc modifier with the old APIs.
For MPLANE, where backward compatibility was built into libv4l2 LD_PRELOAD
wrapper,
Could you refresh my memory on what kind of backwards compatibility we
had in libv4l2? Was that to make it possible to use new MPLANE-only
drivers with old applications?
lib/libv4l-mplane/libv4l-mplane.c
I think application don't need to know the new MPLANE variant of pixel
formats or queue type.
it simply failed the cases that could not be supported (non contiguous
planes).
regards,
Nicolas
[snip]
int vivid_try_fmt_vid_cap(struct file *file, void *priv,
- struct v4l2_format *f)
+ struct v4l2_ext_pix_format *f)
{
- struct v4l2_pix_format_mplane *mp = &f->fmt.pix_mp;
- struct v4l2_plane_pix_format *pfmt = mp->plane_fmt;
struct vivid_dev *dev = video_drvdata(file);
+ struct v4l2_plane_pix_format *pfmt = f->plane_fmt;
const struct vivid_fmt *fmt;
unsigned bytesperline, max_bpl;
unsigned factor = 1;
unsigned w, h;
unsigned p;
- bool user_set_csc = !!(mp->flags & V4L2_PIX_FMT_FLAG_SET_CSC);
Why is this condition being removed?
Because the v4l2_ext_pix has a struct for the colorspace?
Would you like the idea that driver exports a buffer contains all the
info for an enumeration ?
Best regards,
Tomasz
- fmt = vivid_get_format(dev, mp->pixelformat);
+ fmt = vivid_get_format(dev, f->pixelformat);
if (!fmt) {
dprintk(dev, 1, "Fourcc format (0x%08x) unknown.\n",
- mp->pixelformat);
- mp->pixelformat = V4L2_PIX_FMT_YUYV;
- fmt = vivid_get_format(dev, mp->pixelformat);
+ f->pixelformat);
+ f->pixelformat = V4L2_PIX_FMT_YUYV;
+ fmt = vivid_get_format(dev, f->pixelformat);
}
- mp->field = vivid_field_cap(dev, mp->field);
+ f->field = vivid_field_cap(dev, f->field);
if (vivid_is_webcam(dev)) {
const struct v4l2_frmsize_discrete *sz =
v4l2_find_nearest_size(webcam_sizes,
VIVID_WEBCAM_SIZES, width,
- height, mp->width, mp->height);
+ height, f->width, f->height);
w = sz->width;
h = sz->height;
@@ -604,14 +603,14 @@ int vivid_try_fmt_vid_cap(struct file *file, void *priv,
w = dev->src_rect.width;
h = dev->src_rect.height;
}
- if (V4L2_FIELD_HAS_T_OR_B(mp->field))
+ if (V4L2_FIELD_HAS_T_OR_B(f->field))
factor = 2;
if (vivid_is_webcam(dev) ||
(!dev->has_scaler_cap && !dev->has_crop_cap && !dev->has_compose_cap)) {
- mp->width = w;
- mp->height = h / factor;
+ f->width = w;
+ f->height = h / factor;
} else {
- struct v4l2_rect r = { 0, 0, mp->width, mp->height * factor };
+ struct v4l2_rect r = { 0, 0, f->width, f->height * factor };
v4l2_rect_set_min_size(&r, &vivid_min_rect);
v4l2_rect_set_max_size(&r, &vivid_max_rect);
@@ -624,16 +623,15 @@ int vivid_try_fmt_vid_cap(struct file *file, void *priv,
} else if (!dev->has_scaler_cap && !dev->has_crop_cap) {
v4l2_rect_set_min_size(&r, &dev->src_rect);
}
- mp->width = r.width;
- mp->height = r.height / factor;
+ f->width = r.width;
+ f->height = r.height / factor;
}
/* This driver supports custom bytesperline values */
- mp->num_planes = fmt->buffers;
for (p = 0; p < fmt->buffers; p++) {
/* Calculate the minimum supported bytesperline value */
- bytesperline = (mp->width * fmt->bit_depth[p]) >> 3;
+ bytesperline = (f->width * fmt->bit_depth[p]) >> 3;
/* Calculate the maximum supported bytesperline value */
max_bpl = (MAX_ZOOM * MAX_WIDTH * fmt->bit_depth[p]) >> 3;
@@ -642,48 +640,49 @@ int vivid_try_fmt_vid_cap(struct file *file, void *priv,
if (pfmt[p].bytesperline < bytesperline)
pfmt[p].bytesperline = bytesperline;
- pfmt[p].sizeimage = (pfmt[p].bytesperline * mp->height) /
+ pfmt[p].sizeimage = (pfmt[p].bytesperline * f->height) /
fmt->vdownsampling[p] + fmt->data_offset[p];
-
- memset(pfmt[p].reserved, 0, sizeof(pfmt[p].reserved));
}
+
+ if (p < VIDEO_MAX_PLANES)
+ pfmt[p].sizeimage = 0;
+
for (p = fmt->buffers; p < fmt->planes; p++)
- pfmt[0].sizeimage += (pfmt[0].bytesperline * mp->height *
+ pfmt[0].sizeimage += (pfmt[0].bytesperline * f->height *
(fmt->bit_depth[p] / fmt->vdownsampling[p])) /
(fmt->bit_depth[0] / fmt->vdownsampling[0]);
- if (!user_set_csc || !v4l2_is_colorspace_valid(mp->colorspace))
- mp->colorspace = vivid_colorspace_cap(dev);
+ if (!v4l2_is_colorspace_valid(f->colorspace))
+ f->colorspace = vivid_colorspace_cap(dev);
- if (!user_set_csc || !v4l2_is_xfer_func_valid(mp->xfer_func))
- mp->xfer_func = vivid_xfer_func_cap(dev);
+ if (!v4l2_is_xfer_func_valid(f->xfer_func))
+ f->xfer_func = vivid_xfer_func_cap(dev);
if (fmt->color_enc == TGP_COLOR_ENC_HSV) {
- if (!user_set_csc || !v4l2_is_hsv_enc_valid(mp->hsv_enc))
- mp->hsv_enc = vivid_hsv_enc_cap(dev);
+ if (!v4l2_is_hsv_enc_valid(f->hsv_enc))
+ f->hsv_enc = vivid_hsv_enc_cap(dev);
} else if (fmt->color_enc == TGP_COLOR_ENC_YCBCR) {
- if (!user_set_csc || !v4l2_is_ycbcr_enc_valid(mp->ycbcr_enc))
- mp->ycbcr_enc = vivid_ycbcr_enc_cap(dev);
+ if (!v4l2_is_ycbcr_enc_valid(f->ycbcr_enc))
+ f->ycbcr_enc = vivid_ycbcr_enc_cap(dev);
} else {
- mp->ycbcr_enc = vivid_ycbcr_enc_cap(dev);
+ f->ycbcr_enc = vivid_ycbcr_enc_cap(dev);
}
if (fmt->color_enc == TGP_COLOR_ENC_YCBCR ||
fmt->color_enc == TGP_COLOR_ENC_RGB) {
- if (!user_set_csc || !v4l2_is_quant_valid(mp->quantization))
- mp->quantization = vivid_quantization_cap(dev);
+ if (!v4l2_is_quant_valid(f->quantization))
+ f->quantization = vivid_quantization_cap(dev);
} else {
- mp->quantization = vivid_quantization_cap(dev);
+ f->quantization = vivid_quantization_cap(dev);
}
- memset(mp->reserved, 0, sizeof(mp->reserved));
+ memset(f->reserved, 0, sizeof(f->reserved));
return 0;
}
[snip]