[PATCH v7 07/12] media: rkvdec: Extract decoded format enumeration into helper

Sebastian Fricke
2025-02-25T09:41:57Z

From: Jonas Karlman <jonas@kwiboo.se>

Add a rkvdec_is_valid_fmt() helper that check if a fourcc is a supported
CAPTURE format, and a rkvdec_enum_decoded_fmt() helper that enumerates
valid formats.

This moves current code into helper functions in preparation for adding
CAPTURE format filtering and validation in next patch.

Signed-off-by: Jonas Karlman <jonas@kwiboo.se>
Reviewed-by: Nicolas Dufresne <nicolas.dufresne@collabora.com>
Tested-by: Nicolas Dufresne <nicolas.dufresne@collabora.com>
Tested-by: Christopher Obbard <chris.obbard@collabora.com>
---
drivers/staging/media/rkvdec/rkvdec.c | 49 +++++++++++++++++++++++++----------
1 file changed, 35 insertions(+), 14 deletions(-)

diff --git a/drivers/staging/media/rkvdec/rkvdec.c b/drivers/staging/media/rkvdec/rkvdec.c
index 1f8f98cf91dc205f4a9da2712c81e90b726a6e57..52e64b399dcc4a0c028cac908c0b1ceb49956c5f 100644
--- a/drivers/staging/media/rkvdec/rkvdec.c
+++ b/drivers/staging/media/rkvdec/rkvdec.c
@@ -27,6 +27,32 @@
#include "rkvdec.h"
#include "rkvdec-regs.h"

+static u32 rkvdec_enum_decoded_fmt(struct rkvdec_ctx *ctx, int index)
+{
+ const struct rkvdec_coded_fmt_desc *desc = ctx->coded_fmt_desc;
+
+ if (WARN_ON(!desc))
+ return 0;
+
+ if (index >= desc->num_decoded_fmts)
+ return 0;
+
+ return desc->decoded_fmts[index];
+}
+
+static bool rkvdec_is_valid_fmt(struct rkvdec_ctx *ctx, u32 fourcc)
+{
+ const struct rkvdec_coded_fmt_desc *desc = ctx->coded_fmt_desc;
+ unsigned int i;
+
+ for (i = 0; i < desc->num_decoded_fmts; i++) {
+ if (desc->decoded_fmts[i] == fourcc)
+ return true;
+ }
+
+ return false;
+}
+
static void rkvdec_fill_decoded_pixfmt(struct rkvdec_ctx *ctx,
struct v4l2_pix_format_mplane *pix_mp)
{
@@ -52,8 +78,10 @@ static void rkvdec_reset_fmt(struct rkvdec_ctx *ctx, struct v4l2_format *f,
static void rkvdec_reset_decoded_fmt(struct rkvdec_ctx *ctx)
{
struct v4l2_format *f = &ctx->decoded_fmt;
+ u32 fourcc;

- rkvdec_reset_fmt(ctx, f, ctx->coded_fmt_desc->decoded_fmts[0]);
+ fourcc = rkvdec_enum_decoded_fmt(ctx, 0);
+ rkvdec_reset_fmt(ctx, f, fourcc);
f->type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
f->fmt.pix_mp.width = ctx->coded_fmt.fmt.pix_mp.width;
f->fmt.pix_mp.height = ctx->coded_fmt.fmt.pix_mp.height;
@@ -244,7 +272,6 @@ static int rkvdec_try_capture_fmt(struct file *file, void *priv,
struct v4l2_pix_format_mplane *pix_mp = &f->fmt.pix_mp;
struct rkvdec_ctx *ctx = fh_to_rkvdec_ctx(priv);
const struct rkvdec_coded_fmt_desc *coded_desc;
- unsigned int i;

/*
* The codec context should point to a coded format desc, if the format
@@ -255,13 +282,8 @@ static int rkvdec_try_capture_fmt(struct file *file, void *priv,
if (WARN_ON(!coded_desc))
return -EINVAL;

- for (i = 0; i < coded_desc->num_decoded_fmts; i++) {
- if (coded_desc->decoded_fmts[i] == pix_mp->pixelformat)
- break;
- }
-
- if (i == coded_desc->num_decoded_fmts)
- pix_mp->pixelformat = coded_desc->decoded_fmts[0];
+ if (!rkvdec_is_valid_fmt(ctx, pix_mp->pixelformat))
+ pix_mp->pixelformat = rkvdec_enum_decoded_fmt(ctx, 0);

/* Always apply the frmsize constraint of the coded end. */
pix_mp->width = max(pix_mp->width, ctx->coded_fmt.fmt.pix_mp.width);
@@ -425,14 +447,13 @@ static int rkvdec_enum_capture_fmt(struct file *file, void *priv,
struct v4l2_fmtdesc *f)
{
struct rkvdec_ctx *ctx = fh_to_rkvdec_ctx(priv);
+ u32 fourcc;

- if (WARN_ON(!ctx->coded_fmt_desc))
- return -EINVAL;
-
- if (f->index >= ctx->coded_fmt_desc->num_decoded_fmts)
+ fourcc = rkvdec_enum_decoded_fmt(ctx, f->index);
+ if (!fourcc)
return -EINVAL;

- f->pixelformat = ctx->coded_fmt_desc->decoded_fmts[f->index];
+ f->pixelformat = fourcc;
return 0;
}

--
2.25.1