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https://github.com/apache/nuttx.git
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Refactor nuttx v4l2
Adjust the v4l2 framework to support both capture and v4l2m2m, and can easily add other v4l2 features. Signed-off-by: shizhenghui <shizhenghui@xiaomi.com>
This commit is contained in:
shizhenghui
Xiang Xiao
@@ -0,0 +1,87 @@
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/****************************************************************************
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* include/nuttx/video/v4l2_cap.h
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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****************************************************************************/
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#ifndef __NUTTX_VIDEO_V4L2_CAP_H
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#define __NUTTX_VIDEO_V4L2_CAP_H
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/video/imgdata.h>
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#include <nuttx/video/imgsensor.h>
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#ifdef __cplusplus
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extern "C"
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{
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#endif
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/****************************************************************************
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* Public Function Prototypes
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****************************************************************************/
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/* Initialize capture driver.
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*
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* param [in] devpath: path to capture device
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*
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* Return on success, 0 is returned. On failure,
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* negative value is returned.
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*/
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int capture_initialize(FAR const char *devpath);
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/* Uninitialize capture driver.
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*
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* Return on success, 0 is returned. On failure,
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* negative value is returned.
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*/
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int capture_uninitialize(FAR const char *devpath);
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/* New API to register capture driver.
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*
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* param [in] devpath: path to capture device
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* param [in] data: provide imgdata ops
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* param [in] sensor: provide imgsensor ops array
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* param [in] sensor_num: the number of imgsensor ops array
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*
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* Return on success, 0 is returned. On failure,
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* negative value is returned.
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*/
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int capture_register(FAR const char *devpath,
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FAR struct imgdata_s *data,
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FAR struct imgsensor_s **sensors,
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size_t sensor_num);
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/* New API to Unregister capture driver.
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*
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* param [in] devpath: path to capture device
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*
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* Return on success, 0 is returned. On failure,
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* negative value is returned.
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*/
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int capture_unregister(FAR const char *devpath);
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#ifdef __cplusplus
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}
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#endif
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#endif /* __NUTTX_VIDEO_V4L2_CAP_H */
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+92
-24
@@ -30,6 +30,7 @@
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****************************************************************************/
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#include <sys/videoio.h>
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#include <nuttx/fs/fs.h>
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#ifdef __cplusplus
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extern "C"
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@@ -55,31 +56,100 @@ extern "C"
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#define VIDEO_HSIZE_3M (2048) /* 3M horizontal size */
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#define VIDEO_VSIZE_3M (1536) /* 3M vertical size */
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/****************************************************************************
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* Public Types
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*****************************************************************************/
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struct video_format_s
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{
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uint16_t width;
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uint16_t height;
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uint32_t pixelformat;
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};
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typedef struct video_format_s video_format_t;
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struct v4l2_s
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{
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FAR const struct v4l2_ops_s *vops;
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FAR const struct file_operations *fops;
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};
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struct v4l2_ops_s
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{
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CODE int (*querycap)(FAR struct v4l2_s *ctx,
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FAR struct v4l2_capability *cap);
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CODE int (*g_input)(FAR int *num);
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CODE int (*enum_input)(FAR struct v4l2_s *ctx,
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FAR struct v4l2_input *input);
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CODE int (*reqbufs)(FAR struct v4l2_s *ctx,
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FAR struct v4l2_requestbuffers *reqbufs);
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CODE int (*querybuf)(FAR struct v4l2_s *ctx,
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FAR struct v4l2_buffer *buf);
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CODE int (*qbuf)(FAR struct v4l2_s *ctx,
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FAR struct v4l2_buffer *buf);
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CODE int (*dqbuf)(FAR struct v4l2_s *ctx,
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FAR struct v4l2_buffer *buf, int oflags);
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CODE int (*cancel_dqbuf)(FAR struct v4l2_s *ctx,
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enum v4l2_buf_type type);
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CODE int (*g_fmt)(FAR struct v4l2_s *ctx,
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FAR struct v4l2_format *fmt);
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CODE int (*s_fmt)(FAR struct v4l2_s *ctx,
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FAR struct v4l2_format *fmt);
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CODE int (*try_fmt)(FAR struct v4l2_s *ctx,
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FAR struct v4l2_format *v4l2);
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CODE int (*g_parm)(FAR struct v4l2_s *ctx,
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FAR struct v4l2_streamparm *parm);
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CODE int (*s_parm)(FAR struct v4l2_s *ctx,
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FAR struct v4l2_streamparm *parm);
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CODE int (*streamon)(FAR struct v4l2_s *ctx,
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FAR enum v4l2_buf_type *type);
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CODE int (*streamoff)(FAR struct v4l2_s *ctx,
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FAR enum v4l2_buf_type *type);
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CODE int (*do_halfpush)(FAR struct v4l2_s *ctx,
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bool enable);
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CODE int (*takepict_start)(FAR struct v4l2_s *ctx,
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int32_t capture_num);
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CODE int (*takepict_stop)(FAR struct v4l2_s *ctx,
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bool halfpush);
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CODE int (*s_selection)(FAR struct v4l2_s *ctx,
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FAR struct v4l2_selection *clip);
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CODE int (*g_selection)(FAR struct v4l2_s *ctx,
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FAR struct v4l2_selection *clip);
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CODE int (*queryctrl)(FAR struct v4l2_s *ctx,
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FAR struct v4l2_queryctrl *ctrl);
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CODE int (*query_ext_ctrl)(FAR struct v4l2_s *ctx,
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FAR struct v4l2_query_ext_ctrl *ctrl);
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CODE int (*querymenu)(FAR struct v4l2_s *ctx,
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FAR struct v4l2_querymenu *menu);
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CODE int (*g_ctrl)(FAR struct v4l2_s *ctx,
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FAR struct v4l2_control *ctrl);
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CODE int (*s_ctrl)(FAR struct v4l2_s *ctx,
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FAR struct v4l2_control *ctrl);
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CODE int (*g_ext_ctrls)(FAR struct v4l2_s *ctx,
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FAR struct v4l2_ext_controls *ctrls);
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CODE int (*s_ext_ctrls)(FAR struct v4l2_s *ctx,
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FAR struct v4l2_ext_controls *ctrls);
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CODE int (*query_ext_ctrl_scene)(FAR struct v4l2_s *ctx,
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FAR struct v4s_query_ext_ctrl_scene *ctrl);
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CODE int (*querymenu_scene)(FAR struct v4l2_s *ctx,
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FAR struct v4s_querymenu_scene *menu);
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CODE int (*g_ext_ctrls_scene)(FAR struct v4l2_s *ctx,
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FAR struct v4s_ext_controls_scene *ctrls);
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CODE int (*s_ext_ctrls_scene)(FAR struct v4l2_s *ctx,
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FAR struct v4s_ext_controls_scene *ctrls);
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CODE int (*enum_fmt)(FAR struct v4l2_s *ctx,
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FAR struct v4l2_fmtdesc *f);
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CODE int (*enum_frminterval)(FAR struct v4l2_s *ctx,
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FAR struct v4l2_frmivalenum *f);
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CODE int (*enum_frmsize)(FAR struct v4l2_s *ctx,
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FAR struct v4l2_frmsizeenum *f);
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};
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/****************************************************************************
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* Public Function Prototypes
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****************************************************************************/
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struct imgdata_s;
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struct imgsensor_s;
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/* Initialize video driver.
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*
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* param [in] devpath: path to video device
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*
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* Return on success, 0 is returned. On failure,
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* negative value is returned.
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*/
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int video_initialize(FAR const char *devpath);
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/* Uninitialize video driver.
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*
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* Return on success, 0 is returned. On failure,
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* negative value is returned.
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*/
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int video_uninitialize(FAR const char *devpath);
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/* New API to register video driver.
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*
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* param [in] devpath: path to video device
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@@ -92,9 +162,7 @@ int video_uninitialize(FAR const char *devpath);
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*/
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int video_register(FAR const char *devpath,
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FAR struct imgdata_s *data,
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FAR struct imgsensor_s **sensors,
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size_t sensor_num);
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FAR struct v4l2_s *ctx);
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/* New API to Unregister video driver.
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*
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