'F.7.3.6.1 General slice segment header syntax' section of HEVC
specification describes that a slice header always end byte aligned,
therefore we only need to provide the data offset in byte.
Signed-off-by: Benjamin Gaignard <[email protected]>
---
version 5:
- Fix numbers of bits computation in cedrus_h265_skip_bits() parameters
Documentation/userspace-api/media/v4l/ext-ctrls-codec.rst | 4 ++--
drivers/staging/media/sunxi/cedrus/cedrus_h265.c | 2 +-
include/media/hevc-ctrls.h | 4 ++--
3 files changed, 5 insertions(+), 5 deletions(-)
diff --git a/Documentation/userspace-api/media/v4l/ext-ctrls-codec.rst b/Documentation/userspace-api/media/v4l/ext-ctrls-codec.rst
index a3b1a063deba..48b3f533bc17 100644
--- a/Documentation/userspace-api/media/v4l/ext-ctrls-codec.rst
+++ b/Documentation/userspace-api/media/v4l/ext-ctrls-codec.rst
@@ -2986,8 +2986,8 @@ enum v4l2_mpeg_video_hevc_size_of_length_field -
- ``bit_size``
- Size (in bits) of the current slice data.
* - __u32
- - ``data_bit_offset``
- - Offset (in bits) to the video data in the current slice data.
+ - ``data_byte_offset``
+ - Offset (in bytes) to the video data in the current slice data.
* - __u32
- ``num_entry_point_offsets``
- Specifies the number of entry point offset syntax elements in the slice header.
diff --git a/drivers/staging/media/sunxi/cedrus/cedrus_h265.c b/drivers/staging/media/sunxi/cedrus/cedrus_h265.c
index d04521ffd920..4f31f2f3b745 100644
--- a/drivers/staging/media/sunxi/cedrus/cedrus_h265.c
+++ b/drivers/staging/media/sunxi/cedrus/cedrus_h265.c
@@ -405,7 +405,7 @@ static void cedrus_h265_setup(struct cedrus_ctx *ctx,
/* Initialize bitstream access. */
cedrus_write(dev, VE_DEC_H265_TRIGGER, VE_DEC_H265_TRIGGER_INIT_SWDEC);
- cedrus_h265_skip_bits(dev, slice_params->data_bit_offset);
+ cedrus_h265_skip_bits(dev, slice_params->data_byte_offset * 8);
/* Bitstream parameters. */
diff --git a/include/media/hevc-ctrls.h b/include/media/hevc-ctrls.h
index e6cdd122726c..1834072c0a43 100644
--- a/include/media/hevc-ctrls.h
+++ b/include/media/hevc-ctrls.h
@@ -310,7 +310,7 @@ struct v4l2_hevc_pred_weight_table {
* V4L2_CTRL_FLAG_DYNAMIC_ARRAY flag must be set when using it.
*
* @bit_size: size (in bits) of the current slice data
- * @data_bit_offset: offset (in bits) to the video data in the current slice data
+ * @data_byte_offset: offset (in bytes) to the video data in the current slice data
* @num_entry_point_offsets: specifies the number of entry point offset syntax
* elements in the slice header.
* @nal_unit_type: specifies the coding type of the slice (B, P or I)
@@ -354,7 +354,7 @@ struct v4l2_hevc_pred_weight_table {
*/
struct v4l2_ctrl_hevc_slice_params {
__u32 bit_size;
- __u32 data_bit_offset;
+ __u32 data_byte_offset;
__u32 num_entry_point_offsets;
/* ISO/IEC 23008-2, ITU-T Rec. H.265: NAL unit header */
__u8 nal_unit_type;
--
2.32.0
On 07.04.2022 17:29, Benjamin Gaignard wrote:
>'F.7.3.6.1 General slice segment header syntax' section of HEVC
>specification describes that a slice header always end byte aligned,
s/always end byte aligned/always aligns on the end-byte/
or
s/always end byte aligned/always aligns on the last byte/
?
>therefore we only need to provide the data offset in byte.
s/byte/bytes/
Greetings,
Sebastian
>
>Signed-off-by: Benjamin Gaignard <[email protected]>
>---
>version 5:
>- Fix numbers of bits computation in cedrus_h265_skip_bits() parameters
> Documentation/userspace-api/media/v4l/ext-ctrls-codec.rst | 4 ++--
> drivers/staging/media/sunxi/cedrus/cedrus_h265.c | 2 +-
> include/media/hevc-ctrls.h | 4 ++--
> 3 files changed, 5 insertions(+), 5 deletions(-)
>
>diff --git a/Documentation/userspace-api/media/v4l/ext-ctrls-codec.rst b/Documentation/userspace-api/media/v4l/ext-ctrls-codec.rst
>index a3b1a063deba..48b3f533bc17 100644
>--- a/Documentation/userspace-api/media/v4l/ext-ctrls-codec.rst
>+++ b/Documentation/userspace-api/media/v4l/ext-ctrls-codec.rst
>@@ -2986,8 +2986,8 @@ enum v4l2_mpeg_video_hevc_size_of_length_field -
> - ``bit_size``
> - Size (in bits) of the current slice data.
> * - __u32
>- - ``data_bit_offset``
>- - Offset (in bits) to the video data in the current slice data.
>+ - ``data_byte_offset``
>+ - Offset (in bytes) to the video data in the current slice data.
> * - __u32
> - ``num_entry_point_offsets``
> - Specifies the number of entry point offset syntax elements in the slice header.
>diff --git a/drivers/staging/media/sunxi/cedrus/cedrus_h265.c b/drivers/staging/media/sunxi/cedrus/cedrus_h265.c
>index d04521ffd920..4f31f2f3b745 100644
>--- a/drivers/staging/media/sunxi/cedrus/cedrus_h265.c
>+++ b/drivers/staging/media/sunxi/cedrus/cedrus_h265.c
>@@ -405,7 +405,7 @@ static void cedrus_h265_setup(struct cedrus_ctx *ctx,
> /* Initialize bitstream access. */
> cedrus_write(dev, VE_DEC_H265_TRIGGER, VE_DEC_H265_TRIGGER_INIT_SWDEC);
>
>- cedrus_h265_skip_bits(dev, slice_params->data_bit_offset);
>+ cedrus_h265_skip_bits(dev, slice_params->data_byte_offset * 8);
>
> /* Bitstream parameters. */
>
>diff --git a/include/media/hevc-ctrls.h b/include/media/hevc-ctrls.h
>index e6cdd122726c..1834072c0a43 100644
>--- a/include/media/hevc-ctrls.h
>+++ b/include/media/hevc-ctrls.h
>@@ -310,7 +310,7 @@ struct v4l2_hevc_pred_weight_table {
> * V4L2_CTRL_FLAG_DYNAMIC_ARRAY flag must be set when using it.
> *
> * @bit_size: size (in bits) of the current slice data
>- * @data_bit_offset: offset (in bits) to the video data in the current slice data
>+ * @data_byte_offset: offset (in bytes) to the video data in the current slice data
> * @num_entry_point_offsets: specifies the number of entry point offset syntax
> * elements in the slice header.
> * @nal_unit_type: specifies the coding type of the slice (B, P or I)
>@@ -354,7 +354,7 @@ struct v4l2_hevc_pred_weight_table {
> */
> struct v4l2_ctrl_hevc_slice_params {
> __u32 bit_size;
>- __u32 data_bit_offset;
>+ __u32 data_byte_offset;
> __u32 num_entry_point_offsets;
> /* ISO/IEC 23008-2, ITU-T Rec. H.265: NAL unit header */
> __u8 nal_unit_type;
>--
>2.32.0
>