From: Hans Verkuil <hverkuil-cisco@xs4all.nl>
To: linux-media@vger.kernel.org
Cc: Tomasz Figa <tfiga@chromium.org>,
Hans Verkuil <hverkuil-cisco@xs4all.nl>
Subject: [PATCHv3 10/12] videodev2.h: add V4L2_DEC_CMD_FLUSH
Date: Thu, 15 Aug 2019 16:44:54 +0200 [thread overview]
Message-ID: <20190815144456.54583-11-hverkuil-cisco@xs4all.nl> (raw)
In-Reply-To: <20190815144456.54583-1-hverkuil-cisco@xs4all.nl>
Add this new V4L2_DEC_CMD_FLUSH decoder command and document it.
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
---
Documentation/media/uapi/v4l/vidioc-decoder-cmd.rst | 11 ++++++++++-
Documentation/media/videodev2.h.rst.exceptions | 1 +
include/uapi/linux/videodev2.h | 1 +
3 files changed, 12 insertions(+), 1 deletion(-)
diff --git a/Documentation/media/uapi/v4l/vidioc-decoder-cmd.rst b/Documentation/media/uapi/v4l/vidioc-decoder-cmd.rst
index 57f0066f4cff..0bffef6058f7 100644
--- a/Documentation/media/uapi/v4l/vidioc-decoder-cmd.rst
+++ b/Documentation/media/uapi/v4l/vidioc-decoder-cmd.rst
@@ -208,7 +208,16 @@ introduced in Linux 3.3. They are, however, mandatory for stateful mem2mem decod
been started yet, the driver will return an ``EPERM`` error code. When
the decoder is already running, this command does nothing. No
flags are defined for this command.
-
+ * - ``V4L2_DEC_CMD_FLUSH``
+ - 4
+ - Flush any held capture buffers. Only valid for stateless decoders,
+ and only if ``V4L2_BUF_CAP_SUPPORTS_M2M_HOLD_CAPTURE_BUF`` was set.
+ This command is typically used when the application reached the
+ end of the stream and the last output buffer had the
+ ``V4L2_BUF_FLAG_M2M_HOLD_CAPTURE_BUF`` flag set. This would prevent
+ dequeueing the last capture buffer containing the last decoded frame.
+ So this command can be used to explicitly flush that last decoded
+ frame.
Return Value
============
diff --git a/Documentation/media/videodev2.h.rst.exceptions b/Documentation/media/videodev2.h.rst.exceptions
index adeb6b7a15cb..a79028e4d929 100644
--- a/Documentation/media/videodev2.h.rst.exceptions
+++ b/Documentation/media/videodev2.h.rst.exceptions
@@ -434,6 +434,7 @@ replace define V4L2_DEC_CMD_START decoder-cmds
replace define V4L2_DEC_CMD_STOP decoder-cmds
replace define V4L2_DEC_CMD_PAUSE decoder-cmds
replace define V4L2_DEC_CMD_RESUME decoder-cmds
+replace define V4L2_DEC_CMD_FLUSH decoder-cmds
replace define V4L2_DEC_CMD_START_MUTE_AUDIO decoder-cmds
replace define V4L2_DEC_CMD_PAUSE_TO_BLACK decoder-cmds
diff --git a/include/uapi/linux/videodev2.h b/include/uapi/linux/videodev2.h
index 4fa9f543742d..91a79e16089c 100644
--- a/include/uapi/linux/videodev2.h
+++ b/include/uapi/linux/videodev2.h
@@ -1978,6 +1978,7 @@ struct v4l2_encoder_cmd {
#define V4L2_DEC_CMD_STOP (1)
#define V4L2_DEC_CMD_PAUSE (2)
#define V4L2_DEC_CMD_RESUME (3)
+#define V4L2_DEC_CMD_FLUSH (4)
/* Flags for V4L2_DEC_CMD_START */
#define V4L2_DEC_CMD_START_MUTE_AUDIO (1 << 0)
--
2.20.1
next prev parent reply other threads:[~2019-08-15 14:45 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-08-15 14:44 [PATCHv3 00/12] Stateful/stateless codec core support Hans Verkuil
2019-08-15 14:44 ` [PATCHv3 01/12] videodev2.h: add V4L2_FMT_FLAG_CONTINUOUS_BYTESTREAM Hans Verkuil
2019-08-15 14:44 ` [PATCHv3 02/12] videodev2.h: add V4L2_FMT_FLAG_DYN_RESOLUTION Hans Verkuil
2019-08-15 14:44 ` [PATCHv3 03/12] media: venus: vdec: flag OUTPUT formats with V4L2_FMT_FLAG_DYN_RESOLUTION Hans Verkuil
2019-08-15 14:44 ` [PATCHv3 04/12] media: s5p_mfc_dec: set flags for OUTPUT coded formats Hans Verkuil
2022-01-28 10:10 ` Hans Verkuil
2019-08-15 14:44 ` [PATCHv3 05/12] media: mtk-vcodec: flag OUTPUT formats with V4L2_FMT_FLAG_DYN_RESOLUTION Hans Verkuil
2019-08-15 14:44 ` [PATCHv3 06/12] media: vicodec: set flags for vdec/stateful OUTPUT coded formats Hans Verkuil
2019-08-15 14:44 ` [PATCHv3 07/12] media: docs-rst: Document memory-to-memory video decoder interface Hans Verkuil
2019-08-15 14:44 ` [PATCHv3 08/12] pixfmt-compressed.rst: improve H264/HEVC/MPEG1+2/VP8+9 documentation Hans Verkuil
2019-08-15 14:44 ` [PATCHv3 09/12] vb2: add V4L2_BUF_FLAG_M2M_HOLD_CAPTURE_BUF Hans Verkuil
2019-08-15 14:44 ` Hans Verkuil [this message]
2019-08-15 14:44 ` [PATCHv3 11/12] media: docs-rst: Document m2m stateless video decoder interface Hans Verkuil
2019-09-26 11:33 ` Hans Verkuil
2019-09-26 15:40 ` Nicolas Dufresne
2019-10-02 6:31 ` Tomasz Figa
2019-08-15 14:44 ` [PATCHv3 12/12] media: docs-rst: Document memory-to-memory video encoder interface Hans Verkuil
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