Modify the scaler subdevice to accept setting the resolution of the source
pad (previously the source resolution would always be 3 times the sink for
both dimensions). Now any resolution can be set at src (even smaller ones)
and the sink video will be scaled to match it.
Test example: With the vimc module up (using the default vimc topology)
media-ctl -d /dev/media0 -V '"Sensor A":0[fmt:SBGGR8_1X8/640x480]'
media-ctl -d /dev/media0 -V '"Debayer A":0[fmt:SBGGR8_1X8/640x480]'
media-ctl -d /dev/media0 -V '"Scaler":0[fmt:RGB888_1X24/640x480]'
media-ctl -d /dev/media0 -V '"Scaler":0[crop:(100,50)/400x150]'
media-ctl -d /dev/media0 -V '"Scaler":1[fmt:RGB888_1X24/300x700]'
v4l2-ctl -d /dev/video2 -v width=300,height=700
v4l2-ctl -d /dev/video0 -v pixelformat=BA81
v4l2-ctl --stream-mmap --stream-count=10 -d /dev/video2 \
--stream-to=test.raw
The result will be a cropped stream that can be checked with the command
ffplay -loglevel warning -v info -f rawvideo -pixel_format rgb24 \
-video_size "300x700" test.raw
Co-developed-by: Gabriela Bittencourt <gabrielabittencourt00@xxxxxxxxx>
Signed-off-by: Gabriela Bittencourt <gabrielabittencourt00@xxxxxxxxx>
Co-developed-by: Gabriel Francisco Mandaji <gfmandaji@xxxxxxxxx>
Signed-off-by: Gabriel Francisco Mandaji <gfmandaji@xxxxxxxxx>
Signed-off-by: Pedro "pirate" Terra <pirate@xxxxxxxxxx>
---
Changes in V5:
* Fixed code aliment mistake
* Renamed some variables to make the code more readable
* Propagate sink pad formatting to src resetting the 1:1 scaling ratio.
(the crop is also reset when this is done).
Changes in V4:
* Rebased with media/master
* Scaling is now compatible with crop
* Updated test example at the commit message
* Add vimc prefix to the pad enumeration
Changes in V3:
* Corrections suggested by Hans:
- Default scaling factor is now 1 (we removed the define and
set the source format equals the sink).
- Removed SCA_COUNT (enum that represents the number of pads)
as there always 2
- Swapped the per byte pixel copy to memcpy.
* Corrections suggested by Dafna:
- Removed from the documentation the old scaler parameter which
isn't necessary anymore.
* Added a thank you note at the end of the email
Changes in V2:
* Patch was not sent to media list mail for some reason (even though it
was on the Cc list), trying again.
* Updating documentation.
Running
/usr/local/bin/v4l2-compliance -m /dev/media0
Gave the following result:
v4l2-compliance SHA: c86aab9cc7f1 2021-07-28 11:52:45
Grand Total for vimc device /dev/media0: 473, Succeeded: 473, Failed: 0, Warnings: 0
---
Documentation/admin-guide/media/vimc.rst | 18 +-
drivers/media/test-drivers/vimc/vimc-scaler.c | 287 +++++++-----------
2 files changed, 115 insertions(+), 190 deletions(-)
diff --git a/Documentation/admin-guide/media/vimc.rst b/Documentation/admin-guide/media/vimc.rst
index 211cc8972410..b6a123e22544 100644
--- a/Documentation/admin-guide/media/vimc.rst
+++ b/Documentation/admin-guide/media/vimc.rst
@@ -65,6 +65,11 @@ vimc-scaler:
1920x1440 image. (this value can be configured, see at
`Module options`_).
Exposes:
+ Re-size the image to meet the source pad resolution. E.g.: if the sync pad
+is configured to 360x480 and the source to 1280x720, the image will be stretched
+to fit the source resolution. Works for any resolution within the vimc
+limitations (even shrinking the image if necessary).
+Exposes:
* 1 Pad sink
* 1 Pad source
@@ -75,16 +80,3 @@ vimc-capture:
* 1 Pad sink
* 1 Pad source
-
-
-Module options
---------------
-
-Vimc has a module parameter to configure the driver.
-
-* ``sca_mult=<unsigned int>``
-
- Image size multiplier factor to be used to multiply both width and
- height, so the image size will be ``sca_mult^2`` bigger than the
- original one. Currently, only supports scaling up (the default value
- is 3).
diff --git a/drivers/media/test-drivers/vimc/vimc-scaler.c b/drivers/media/test-drivers/vimc/vimc-scaler.c
index 06880dd0b6ac..745316a50459 100644
--- a/drivers/media/test-drivers/vimc/vimc-scaler.c
+++ b/drivers/media/test-drivers/vimc/vimc-scaler.c
@@ -6,6 +6,7 @@
*/
#include <linux/moduleparam.h>
+#include <linux/string.h>
#include <linux/vmalloc.h>
#include <linux/v4l2-mediabus.h>
#include <media/v4l2-rect.h>
@@ -13,11 +14,11 @@
#include "vimc-common.h"
-static unsigned int sca_mult = 3;
-module_param(sca_mult, uint, 0000);
-MODULE_PARM_DESC(sca_mult, " the image size multiplier");
-
-#define MAX_ZOOM 8
+/* Pad identifier */
+enum vic_sca_pad {
+ VIMC_SCA_SINK = 0,
+ VIMC_SCA_SRC = 1,
+};
#define VIMC_SCA_FMT_WIDTH_DEFAULT 640
#define VIMC_SCA_FMT_HEIGHT_DEFAULT 480
@@ -25,14 +26,11 @@ MODULE_PARM_DESC(sca_mult, " the image size multiplier");
struct vimc_sca_device {
struct vimc_ent_device ved;
struct v4l2_subdev sd;
- /* NOTE: the source fmt is the same as the sink
- * with the width and hight multiplied by mult
- */
- struct v4l2_mbus_framefmt sink_fmt;
struct v4l2_rect crop_rect;
+ /* Frame format for both sink and src pad */
+ struct v4l2_mbus_framefmt fmt[2];
/* Values calculated when the stream starts */
u8 *src_frame;
- unsigned int src_line_size;
unsigned int bpp;
struct media_pad pads[2];
};
@@ -72,17 +70,6 @@ vimc_sca_get_crop_bound_sink(const struct v4l2_mbus_framefmt *sink_fmt)
return r;
}
-static void vimc_sca_adjust_sink_crop(struct v4l2_rect *r,
- const struct v4l2_mbus_framefmt *sink_fmt)
-{
- const struct v4l2_rect sink_rect =
- vimc_sca_get_crop_bound_sink(sink_fmt);
-
- /* Disallow rectangles smaller than the minimal one. */
- v4l2_rect_set_min_size(r, &crop_rect_min);
- v4l2_rect_map_inside(r, &sink_rect);
-}
-
static int vimc_sca_init_cfg(struct v4l2_subdev *sd,
struct v4l2_subdev_state *sd_state)
{
@@ -90,17 +77,15 @@ static int vimc_sca_init_cfg(struct v4l2_subdev *sd,
struct v4l2_rect *r;
unsigned int i;
- mf = v4l2_subdev_get_try_format(sd, sd_state, 0);
+ mf = v4l2_subdev_get_try_format(sd, sd_state, VIMC_SCA_SINK);
*mf = sink_fmt_default;
- r = v4l2_subdev_get_try_crop(sd, sd_state, 0);
+ r = v4l2_subdev_get_try_crop(sd, sd_state, VIMC_SCA_SINK);
*r = crop_rect_default;
for (i = 1; i < sd->entity.num_pads; i++) {
mf = v4l2_subdev_get_try_format(sd, sd_state, i);
*mf = sink_fmt_default;
- mf->width = mf->width * sca_mult;
- mf->height = mf->height * sca_mult;
}
return 0;
@@ -144,13 +129,8 @@ static int vimc_sca_enum_frame_size(struct v4l2_subdev *sd,
fse->min_width = VIMC_FRAME_MIN_WIDTH;
fse->min_height = VIMC_FRAME_MIN_HEIGHT;
- if (VIMC_IS_SINK(fse->pad)) {
- fse->max_width = VIMC_FRAME_MAX_WIDTH;
- fse->max_height = VIMC_FRAME_MAX_HEIGHT;
- } else {
- fse->max_width = VIMC_FRAME_MAX_WIDTH * MAX_ZOOM;
- fse->max_height = VIMC_FRAME_MAX_HEIGHT * MAX_ZOOM;
- }
+ fse->max_width = VIMC_FRAME_MAX_WIDTH;
+ fse->max_height = VIMC_FRAME_MAX_HEIGHT;
return 0;
}
@@ -160,94 +140,82 @@ static int vimc_sca_get_fmt(struct v4l2_subdev *sd,
struct v4l2_subdev_format *format)
{
struct vimc_sca_device *vsca = v4l2_get_subdevdata(sd);
- struct v4l2_rect *crop_rect;
-
- /* Get the current sink format */
- if (format->which == V4L2_SUBDEV_FORMAT_TRY) {
- format->format = *v4l2_subdev_get_try_format(sd, sd_state, 0);
- crop_rect = v4l2_subdev_get_try_crop(sd, sd_state, 0);
- } else {
- format->format = vsca->sink_fmt;
- crop_rect = &vsca->crop_rect;
- }
- /* Scale the frame size for the source pad */
- if (VIMC_IS_SRC(format->pad)) {
- format->format.width = crop_rect->width * sca_mult;
- format->format.height = crop_rect->height * sca_mult;
- }
+ if (format->which == V4L2_SUBDEV_FORMAT_TRY)
+ format->format = *v4l2_subdev_get_try_format(sd, sd_state,
+ format->pad);
+ else
+ format->format = vsca->fmt[format->pad];
return 0;
}
-static void vimc_sca_adjust_sink_fmt(struct v4l2_mbus_framefmt *fmt)
+static void vimc_sca_adjust_fmt(struct v4l2_mbus_framefmt *fmt[], __u32 pad)
{
- const struct vimc_pix_map *vpix;
+ unsigned int src_width, src_height;
- /* Only accept code in the pix map table in non bayer format */
- vpix = vimc_pix_map_by_code(fmt->code);
- if (!vpix || vpix->bayer)
- fmt->code = sink_fmt_default.code;
+ if (pad == VIMC_SCA_SINK) {
+ const struct vimc_pix_map *vpix;
- fmt->width = clamp_t(u32, fmt->width, VIMC_FRAME_MIN_WIDTH,
- VIMC_FRAME_MAX_WIDTH) & ~1;
- fmt->height = clamp_t(u32, fmt->height, VIMC_FRAME_MIN_HEIGHT,
- VIMC_FRAME_MAX_HEIGHT) & ~1;
+ /* Only accept code in the pix map table in non bayer format */
+ vpix = vimc_pix_map_by_code(fmt[VIMC_SCA_SINK]->code);
+ if (!vpix || vpix->bayer)
+ fmt[VIMC_SCA_SINK]->code = sink_fmt_default.code;
+ if (fmt[VIMC_SCA_SINK]->field == V4L2_FIELD_ANY)
+ fmt[VIMC_SCA_SINK]->field = sink_fmt_default.field;
+
+ vimc_colorimetry_clamp(fmt[VIMC_SCA_SINK]);
+ }
- if (fmt->field == V4L2_FIELD_ANY)
- fmt->field = sink_fmt_default.field;
+ fmt[pad]->width = clamp_t(u32, fmt[pad]->width, VIMC_FRAME_MIN_WIDTH,
+ VIMC_FRAME_MAX_WIDTH) & ~1;
+ fmt[pad]->height = clamp_t(u32, fmt[pad]->height, VIMC_FRAME_MIN_HEIGHT,
+ VIMC_FRAME_MAX_HEIGHT) & ~1;
- vimc_colorimetry_clamp(fmt);
+ /* Resets the src pad to match the sink, then restore dimensions if
+ * the pad formatted was the src one
+ */
+ src_width = fmt[pad]->width;
+ src_height = fmt[pad]->height;
+ *fmt[VIMC_SCA_SRC] = *fmt[VIMC_SCA_SINK];
+ fmt[VIMC_SCA_SRC]->width = src_width;
+ fmt[VIMC_SCA_SRC]->height = src_height;
}
static int vimc_sca_set_fmt(struct v4l2_subdev *sd,
struct v4l2_subdev_state *sd_state,
- struct v4l2_subdev_format *fmt)
+ struct v4l2_subdev_format *format)
{
struct vimc_sca_device *vsca = v4l2_get_subdevdata(sd);
- struct v4l2_mbus_framefmt *sink_fmt;
+ struct v4l2_mbus_framefmt *fmt[2];
struct v4l2_rect *crop_rect;
- if (fmt->which == V4L2_SUBDEV_FORMAT_ACTIVE) {
+ if (format->which == V4L2_SUBDEV_FORMAT_ACTIVE) {
/* Do not change the format while stream is on */
if (vsca->src_frame)
return -EBUSY;
- sink_fmt = &vsca->sink_fmt;
+ fmt[VIMC_SCA_SINK] = &vsca->fmt[VIMC_SCA_SINK];
+ fmt[VIMC_SCA_SRC] = &vsca->fmt[VIMC_SCA_SRC];
crop_rect = &vsca->crop_rect;
} else {
- sink_fmt = v4l2_subdev_get_try_format(sd, sd_state, 0);
- crop_rect = v4l2_subdev_get_try_crop(sd, sd_state, 0);
+ fmt[VIMC_SCA_SINK] = v4l2_subdev_get_try_format(sd, sd_state,
+ VIMC_SCA_SINK);
+ fmt[VIMC_SCA_SRC] = v4l2_subdev_get_try_format(sd, sd_state,
+ VIMC_SCA_SRC);
+ crop_rect = v4l2_subdev_get_try_crop(sd, sd_state, VIMC_SCA_SINK);
}
- /*
- * Do not change the format of the source pad,
- * it is propagated from the sink
- */
- if (VIMC_IS_SRC(fmt->pad)) {
- fmt->format = *sink_fmt;
- fmt->format.width = crop_rect->width * sca_mult;
- fmt->format.height = crop_rect->height * sca_mult;
- } else {
- /* Set the new format in the sink pad */
- vimc_sca_adjust_sink_fmt(&fmt->format);
-
- dev_dbg(vsca->ved.dev, "%s: sink format update: "
- "old:%dx%d (0x%x, %d, %d, %d, %d) "
- "new:%dx%d (0x%x, %d, %d, %d, %d)\n", vsca->sd.name,
- /* old */
- sink_fmt->width, sink_fmt->height, sink_fmt->code,
- sink_fmt->colorspace, sink_fmt->quantization,
- sink_fmt->xfer_func, sink_fmt->ycbcr_enc,
- /* new */
- fmt->format.width, fmt->format.height, fmt->format.code,
- fmt->format.colorspace, fmt->format.quantization,
- fmt->format.xfer_func, fmt->format.ycbcr_enc);
-
- *sink_fmt = fmt->format;
+ *fmt[format->pad] = format->format;
+ vimc_sca_adjust_fmt(fmt, format->pad);
+ format->format = *fmt[format->pad];
- /* Do the crop, but respect the current bounds */
- vimc_sca_adjust_sink_crop(crop_rect, sink_fmt);
+ if (format->pad == VIMC_SCA_SINK) {
+ /* Reset the crop to match the sink pad */
+ crop_rect->width = fmt[VIMC_SCA_SINK]->width;
+ crop_rect->height = fmt[VIMC_SCA_SINK]->height;
+ crop_rect->top = 0;
+ crop_rect->left = 0;
}
return 0;
@@ -265,11 +233,13 @@ static int vimc_sca_get_selection(struct v4l2_subdev *sd,
return -EINVAL;
if (sel->which == V4L2_SUBDEV_FORMAT_ACTIVE) {
- sink_fmt = &vsca->sink_fmt;
+ sink_fmt = &vsca->fmt[VIMC_SCA_SINK];
crop_rect = &vsca->crop_rect;
} else {
- sink_fmt = v4l2_subdev_get_try_format(sd, sd_state, 0);
- crop_rect = v4l2_subdev_get_try_crop(sd, sd_state, 0);
+ sink_fmt = v4l2_subdev_get_try_format(sd, sd_state,
+ VIMC_SCA_SINK);
+ crop_rect = v4l2_subdev_get_try_crop(sd, sd_state,
+ VIMC_SCA_SINK);
}
switch (sel->target) {
@@ -286,6 +256,17 @@ static int vimc_sca_get_selection(struct v4l2_subdev *sd,
return 0;
}
+static void vimc_sca_adjust_sink_crop(struct v4l2_rect *r,
+ const struct v4l2_mbus_framefmt *sink_fmt)
+{
+ const struct v4l2_rect sink_rect =
+ vimc_sca_get_crop_bound_sink(sink_fmt);
+
+ /* Disallow rectangles smaller than the minimal one. */
+ v4l2_rect_set_min_size(r, &crop_rect_min);
+ v4l2_rect_map_inside(r, &sink_rect);
+}
+
static int vimc_sca_set_selection(struct v4l2_subdev *sd,
struct v4l2_subdev_state *sd_state,
struct v4l2_subdev_selection *sel)
@@ -303,10 +284,12 @@ static int vimc_sca_set_selection(struct v4l2_subdev *sd,
return -EBUSY;
crop_rect = &vsca->crop_rect;
- sink_fmt = &vsca->sink_fmt;
+ sink_fmt = &vsca->fmt[VIMC_SCA_SINK];
} else {
- crop_rect = v4l2_subdev_get_try_crop(sd, sd_state, 0);
- sink_fmt = v4l2_subdev_get_try_format(sd, sd_state, 0);
+ crop_rect = v4l2_subdev_get_try_crop(sd, sd_state,
+ VIMC_SCA_SINK);
+ sink_fmt = v4l2_subdev_get_try_format(sd, sd_state,
+ VIMC_SCA_SINK);
}
switch (sel->target) {
@@ -344,16 +327,12 @@ static int vimc_sca_s_stream(struct v4l2_subdev *sd, int enable)
return 0;
/* Save the bytes per pixel of the sink */
- vpix = vimc_pix_map_by_code(vsca->sink_fmt.code);
+ vpix = vimc_pix_map_by_code(vsca->fmt[VIMC_SCA_SINK].code);
vsca->bpp = vpix->bpp;
- /* Calculate the width in bytes of the src frame */
- vsca->src_line_size = vsca->crop_rect.width *
- sca_mult * vsca->bpp;
-
/* Calculate the frame size of the source pad */
- frame_size = vsca->src_line_size * vsca->crop_rect.height *
- sca_mult;
+ frame_size = vsca->fmt[VIMC_SCA_SRC].width
+ * vsca->fmt[VIMC_SCA_SRC].height * vsca->bpp;
/* Allocate the frame buffer. Use vmalloc to be able to
* allocate a large amount of memory
@@ -382,77 +361,30 @@ static const struct v4l2_subdev_ops vimc_sca_ops = {
.video = &vimc_sca_video_ops,
};
-static void vimc_sca_fill_pix(u8 *const ptr,
- const u8 *const pixel,
- const unsigned int bpp)
-{
- unsigned int i;
-
- /* copy the pixel to the pointer */
- for (i = 0; i < bpp; i++)
- ptr[i] = pixel[i];
-}
-
-static void vimc_sca_scale_pix(const struct vimc_sca_device *const vsca,
- unsigned int lin, unsigned int col,
- const u8 *const sink_frame)
-{
- const struct v4l2_rect crop_rect = vsca->crop_rect;
- unsigned int i, j, index;
- const u8 *pixel;
-
- /* Point to the pixel value in position (lin, col) in the sink frame */
- index = VIMC_FRAME_INDEX(lin, col,
- vsca->sink_fmt.width,
- vsca->bpp);
- pixel = &sink_frame[index];
-
- dev_dbg(vsca->ved.dev,
- "sca: %s: --- scale_pix sink pos %dx%d, index %d ---\n",
- vsca->sd.name, lin, col, index);
-
- /* point to the place we are going to put the first pixel
- * in the scaled src frame
- */
- lin -= crop_rect.top;
- col -= crop_rect.left;
- index = VIMC_FRAME_INDEX(lin * sca_mult, col * sca_mult,
- crop_rect.width * sca_mult, vsca->bpp);
-
- dev_dbg(vsca->ved.dev, "sca: %s: scale_pix src pos %dx%d, index %d\n",
- vsca->sd.name, lin * sca_mult, col * sca_mult, index);
-
- /* Repeat this pixel mult times */
- for (i = 0; i < sca_mult; i++) {
- /* Iterate through each beginning of a
- * pixel repetition in a line
- */
- for (j = 0; j < sca_mult * vsca->bpp; j += vsca->bpp) {
- dev_dbg(vsca->ved.dev,
- "sca: %s: sca: scale_pix src pos %d\n",
- vsca->sd.name, index + j);
-
- /* copy the pixel to the position index + j */
- vimc_sca_fill_pix(&vsca->src_frame[index + j],
- pixel, vsca->bpp);
- }
-
- /* move the index to the next line */
- index += vsca->src_line_size;
- }
-}
-
static void vimc_sca_fill_src_frame(const struct vimc_sca_device *const vsca,
const u8 *const sink_frame)
{
- const struct v4l2_rect r = vsca->crop_rect;
- unsigned int i, j;
-
- /* Scale each pixel from the original sink frame */
- /* TODO: implement scale down, only scale up is supported for now */
- for (i = r.top; i < r.top + r.height; i++)
- for (j = r.left; j < r.left + r.width; j++)
- vimc_sca_scale_pix(vsca, i, j, sink_frame);
+ const struct v4l2_mbus_framefmt *src_fmt = &vsca->fmt[VIMC_SCA_SRC];
+ const struct v4l2_rect *r = &vsca->crop_rect;
+ unsigned int snk_width = vsca->fmt[VIMC_SCA_SINK].width;
+ unsigned int src_lin, src_col;
+ u8 *walker = vsca->src_frame;
+
+ /* Set each pixel at the src_frame to its sink_frame equivalent */
+ for (src_lin = 0; src_lin < src_fmt->height; src_lin++) {
+ for (src_col = 0; src_col < src_fmt->width; src_col++) {
+ unsigned int snk_lin, snk_col, index;
+
+ snk_lin = (src_lin * r->height) / src_fmt->height
+ + r->top;
+ snk_col = (src_col * r->width) / src_fmt->width
+ + r->left;
+ index = VIMC_FRAME_INDEX(snk_lin, snk_col, snk_width,
+ vsca->bpp);
+ memcpy(walker, &sink_frame[index], vsca->bpp);
+ walker += vsca->bpp;
+ }
+ }
}
static void *vimc_sca_process_frame(struct vimc_ent_device *ved,
@@ -492,8 +424,8 @@ static struct vimc_ent_device *vimc_sca_add(struct vimc_device *vimc,
return ERR_PTR(-ENOMEM);
/* Initialize ved and sd */
- vsca->pads[0].flags = MEDIA_PAD_FL_SINK;
- vsca->pads[1].flags = MEDIA_PAD_FL_SOURCE;
+ vsca->pads[VIMC_SCA_SINK].flags = MEDIA_PAD_FL_SINK;
+ vsca->pads[VIMC_SCA_SRC].flags = MEDIA_PAD_FL_SOURCE;
ret = vimc_ent_sd_register(&vsca->ved, &vsca->sd, v4l2_dev,
vcfg_name,
@@ -508,7 +440,8 @@ static struct vimc_ent_device *vimc_sca_add(struct vimc_device *vimc,
vsca->ved.dev = vimc->mdev.dev;
/* Initialize the frame format */
- vsca->sink_fmt = sink_fmt_default;
+ vsca->fmt[VIMC_SCA_SINK] = sink_fmt_default;
+ vsca->fmt[VIMC_SCA_SRC] = sink_fmt_default;
/* Initialize the crop selection */
vsca->crop_rect = crop_rect_default;
--
2.32.0
