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Subject[PATCH v2 1/1] v4l: mem2mem_testdev: Add horizontal and vertical flip.
Date
Add horizontal and vertical flip to the mem2mem_testdev driver.
Flip modes can be enabled either separately or simultaneously.

Signed-off-by: Tomasz Moń <desowin@gmail.com>
---
drivers/media/video/mem2mem_testdev.c | 135 ++++++++++++++++++++++++++++++---
1 file changed, 124 insertions(+), 11 deletions(-)
diff --git a/drivers/media/video/mem2mem_testdev.c b/drivers/media/video/mem2mem_testdev.c
index d2dec58..e1b66e9 100644
--- a/drivers/media/video/mem2mem_testdev.c
+++ b/drivers/media/video/mem2mem_testdev.c
@@ -60,6 +60,10 @@ MODULE_VERSION("0.1.1");
#define MEM2MEM_COLOR_STEP (0xff >> 4)
#define MEM2MEM_NUM_TILES 8

+/* Flags that indicate processing mode */
+#define MEM2MEM_HFLIP (1 << 0)
+#define MEM2MEM_VFLIP (1 << 1)
+
#define dprintk(dev, fmt, arg...) \
v4l2_dbg(1, 1, &dev->v4l2_dev, "%s: " fmt, __func__, ## arg)

@@ -131,6 +135,24 @@ static struct m2mtest_q_data *get_q_data(enum v4l2_buf_type type)

static struct v4l2_queryctrl m2mtest_ctrls[] = {
{
+ .id = V4L2_CID_HFLIP,
+ .type = V4L2_CTRL_TYPE_BOOLEAN,
+ .name = "Mirror",
+ .minimum = 0,
+ .maximum = 1,
+ .step = 1,
+ .default_value = 0,
+ .flags = 0,
+ }, {
+ .id = V4L2_CID_VFLIP,
+ .type = V4L2_CTRL_TYPE_BOOLEAN,
+ .name = "Vertical Mirror",
+ .minimum = 0,
+ .maximum = 1,
+ .step = 1,
+ .default_value = 0,
+ .flags = 0,
+ }, {
.id = V4L2_CID_TRANS_TIME_MSEC,
.type = V4L2_CTRL_TYPE_INTEGER,
.name = "Transaction time (msec)",
@@ -197,6 +219,9 @@ struct m2mtest_ctx {
/* Abort requested by m2m */
int aborting;

+ /* Processing mode */
+ int mode;
+
struct v4l2_m2m_ctx *m2m_ctx;
};

@@ -247,19 +272,84 @@ static int device_process(struct m2mtest_ctx *ctx,
bytes_left = bytesperline - tile_w * MEM2MEM_NUM_TILES;
w = 0;

- for (y = 0; y < height; ++y) {
- for (t = 0; t < MEM2MEM_NUM_TILES; ++t) {
- if (w & 0x1) {
- for (x = 0; x < tile_w; ++x)
- *p_out++ = *p_in++ + MEM2MEM_COLOR_STEP;
- } else {
- for (x = 0; x < tile_w; ++x)
- *p_out++ = *p_in++ - MEM2MEM_COLOR_STEP;
+ switch (ctx->mode) {
+ case MEM2MEM_HFLIP | MEM2MEM_VFLIP:
+ p_out += bytesperline * height - bytes_left;
+ for (y = 0; y < height; ++y) {
+ for (t = 0; t < MEM2MEM_NUM_TILES; ++t) {
+ if (w & 0x1) {
+ for (x = 0; x < tile_w; ++x)
+ *--p_out = *p_in++ +
+ MEM2MEM_COLOR_STEP;
+ } else {
+ for (x = 0; x < tile_w; ++x)
+ *--p_out = *p_in++ -
+ MEM2MEM_COLOR_STEP;
+ }
+ ++w;
}
- ++w;
+ p_in += bytes_left;
+ p_out -= bytes_left;
+ }
+ break;
+
+ case MEM2MEM_HFLIP:
+ for (y = 0; y < height; ++y) {
+ p_out += MEM2MEM_NUM_TILES * tile_w;
+ for (t = 0; t < MEM2MEM_NUM_TILES; ++t) {
+ if (w & 0x01) {
+ for (x = 0; x < tile_w; ++x)
+ *--p_out = *p_in++ +
+ MEM2MEM_COLOR_STEP;
+ } else {
+ for (x = 0; x < tile_w; ++x)
+ *--p_out = *p_in++ -
+ MEM2MEM_COLOR_STEP;
+ }
+ ++w;
+ }
+ p_in += bytes_left;
+ p_out += bytesperline;
+ }
+ break;
+
+ case MEM2MEM_VFLIP:
+ p_out += bytesperline * (height - 1);
+ for (y = 0; y < height; ++y) {
+ for (t = 0; t < MEM2MEM_NUM_TILES; ++t) {
+ if (w & 0x1) {
+ for (x = 0; x < tile_w; ++x)
+ *p_out++ = *p_in++ +
+ MEM2MEM_COLOR_STEP;
+ } else {
+ for (x = 0; x < tile_w; ++x)
+ *p_out++ = *p_in++ -
+ MEM2MEM_COLOR_STEP;
+ }
+ ++w;
+ }
+ p_in += bytes_left;
+ p_out += bytes_left - 2 * bytesperline;
+ }
+ break;
+
+ default:
+ for (y = 0; y < height; ++y) {
+ for (t = 0; t < MEM2MEM_NUM_TILES; ++t) {
+ if (w & 0x1) {
+ for (x = 0; x < tile_w; ++x)
+ *p_out++ = *p_in++ +
+ MEM2MEM_COLOR_STEP;
+ } else {
+ for (x = 0; x < tile_w; ++x)
+ *p_out++ = *p_in++ -
+ MEM2MEM_COLOR_STEP;
+ }
+ ++w;
+ }
+ p_in += bytes_left;
+ p_out += bytes_left;
}
- p_in += bytes_left;
- p_out += bytes_left;
}

return 0;
@@ -646,6 +736,14 @@ static int vidioc_g_ctrl(struct file *file, void *priv,
struct m2mtest_ctx *ctx = priv;

switch (ctrl->id) {
+ case V4L2_CID_HFLIP:
+ ctrl->value = (ctx->mode & MEM2MEM_HFLIP) ? 1 : 0;
+ break;
+
+ case V4L2_CID_VFLIP:
+ ctrl->value = (ctx->mode & MEM2MEM_VFLIP) ? 1 : 0;
+ break;
+
case V4L2_CID_TRANS_TIME_MSEC:
ctrl->value = ctx->transtime;
break;
@@ -689,6 +787,20 @@ static int vidioc_s_ctrl(struct file *file, void *priv,
return ret;

switch (ctrl->id) {
+ case V4L2_CID_HFLIP:
+ if (ctrl->value)
+ ctx->mode |= MEM2MEM_HFLIP;
+ else
+ ctx->mode &= ~MEM2MEM_HFLIP;
+ break;
+
+ case V4L2_CID_VFLIP:
+ if (ctrl->value)
+ ctx->mode |= MEM2MEM_VFLIP;
+ else
+ ctx->mode &= ~MEM2MEM_VFLIP;
+ break;
+
case V4L2_CID_TRANS_TIME_MSEC:
ctx->transtime = ctrl->value;
break;
@@ -859,6 +971,7 @@ static int m2mtest_open(struct file *file)
ctx->translen = MEM2MEM_DEF_TRANSLEN;
ctx->transtime = MEM2MEM_DEF_TRANSTIME;
ctx->num_processed = 0;
+ ctx->mode = 0;

ctx->m2m_ctx = v4l2_m2m_ctx_init(dev->m2m_dev, ctx, &queue_init);

--
1.7.10
--
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