A libv4l2 plugin will sit in between libv4l2 itself and the
actual /dev/video device node a fd refers to. It will be called each time
libv4l2 wants to do an operation (read/write/ioctl/mmap/munmap) on the
actual /dev/video node in question.
Signed-off-by: Yordan Kamenov <ykamenov@xxxxxxxxxx>
---
lib/include/libv4l2-plugin.h | 43 +++
lib/include/libv4l2.h | 4 +-
lib/include/libv4lconvert.h | 5 +-
lib/libv4l1/libv4l1.c | 2 +-
lib/libv4l2/Makefile | 4 +-
lib/libv4l2/libv4l2-priv.h | 24 ++
lib/libv4l2/libv4l2.c | 128 +++++++---
lib/libv4l2/v4l2-plugin.c | 344 ++++++++++++++++++++++++
lib/libv4l2/v4l2convert.c | 23 ++-
lib/libv4lconvert/control/libv4lcontrol-priv.h | 3 +
lib/libv4lconvert/control/libv4lcontrol.c | 26 +-
lib/libv4lconvert/control/libv4lcontrol.h | 5 +-
lib/libv4lconvert/libv4lconvert-priv.h | 1 +
lib/libv4lconvert/libv4lconvert.c | 25 +-
14 files changed, 573 insertions(+), 64 deletions(-)
create mode 100644 lib/include/libv4l2-plugin.h
create mode 100644 lib/libv4l2/v4l2-plugin.c
diff --git a/lib/include/libv4l2-plugin.h b/lib/include/libv4l2-plugin.h
new file mode 100644
index 0000000..3971735
--- /dev/null
+++ b/lib/include/libv4l2-plugin.h
@@ -0,0 +1,43 @@
+/*
+* Copyright (C) 2010 Nokia Corporation <multimedia@xxxxxxxxx>
+
+* This program is free software; you can redistribute it and/or modify
+* it under the terms of the GNU Lesser General Public License as published by
+* the Free Software Foundation; either version 2.1 of the License, or
+* (at your option) any later version.
+*
+* This program is distributed in the hope that it will be useful,
+* but WITHOUT ANY WARRANTY; without even the implied warranty of
+* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+* Lesser General Public License for more details.
+*
+* You should have received a copy of the GNU Lesser General Public License
+* along with this program; if not, write to the Free Software
+* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+*/
+
+#ifndef __LIBV4L2_PLUGIN_H
+#define __LIBV4L2_PLUGIN_H
+
+#include <sys/types.h>
+
+/* Structure libv4l2_dev_ops holds the calls from libv4ls to video nodes.
+ They can be normal open/clode/ioctl etc. or any of them may be replaced
+ with a callback by a loaded plugin.
+*/
+
+struct libv4l2_dev_ops {
+ int (*open)(const char *file, int oflag, mode_t mode);
+ int (*close)(int fd);
+ int (*ioctl)(int fd, unsigned long int request, void *arg);
+ ssize_t (*read)(int fd, void *buffer, size_t n);
+ void *(*mmap)(void *start, size_t length, int prot, int flags,
+ int fd, int64_t offset);
+ int (*munmap)(void *_start, size_t length);
+};
+
+/* Plugin utility functions */
+void libv4l2_set_plugindata(int fd, void *plugin_data);
+void *libv4l2_get_plugindata(int fd);
+
+#endif
diff --git a/lib/include/libv4l2.h b/lib/include/libv4l2.h
index cc0ab4a..5db000f 100644
--- a/lib/include/libv4l2.h
+++ b/lib/include/libv4l2.h
@@ -22,6 +22,7 @@
#include <stdio.h>
#include <unistd.h>
#include <stdint.h>
+#include "libv4l2-plugin.h"
#ifdef __cplusplus
extern "C" {
@@ -106,7 +107,8 @@ LIBV4L_PUBLIC int v4l2_get_control(int fd, int cid);
Returns fd on success, -1 if the fd is not suitable for use through libv4l2
(note the fd is left open in this case). */
-LIBV4L_PUBLIC int v4l2_fd_open(int fd, int v4l2_flags);
+LIBV4L_PUBLIC int v4l2_fd_open(int fd, struct libv4l2_dev_ops *dev_ops,
+ int v4l2_flags);
#ifdef __cplusplus
}
diff --git a/lib/include/libv4lconvert.h b/lib/include/libv4lconvert.h
index 0264290..f210b2d 100644
--- a/lib/include/libv4lconvert.h
+++ b/lib/include/libv4lconvert.h
@@ -38,6 +38,8 @@
#include <linux/videodev2.h>
+#include "libv4l2-plugin.h"
+
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
@@ -50,7 +52,8 @@ extern "C" {
struct v4lconvert_data;
-LIBV4L_PUBLIC struct v4lconvert_data *v4lconvert_create(int fd);
+LIBV4L_PUBLIC struct v4lconvert_data *v4lconvert_create(int fd,
+ struct libv4l2_dev_ops *dev_ops);
LIBV4L_PUBLIC void v4lconvert_destroy(struct v4lconvert_data *data);
/* When doing flipping / rotating / video-processing, only supported
diff --git a/lib/libv4l1/libv4l1.c b/lib/libv4l1/libv4l1.c
index fee0fb7..180db0e 100644
--- a/lib/libv4l1/libv4l1.c
+++ b/lib/libv4l1/libv4l1.c
@@ -342,7 +342,7 @@ int v4l1_open(const char *file, int oflag, ...)
/* Register with libv4l2, as we use that todo format conversion and read()
emulation for us */
- if (v4l2_fd_open(fd, 0) == -1) {
+ if (v4l2_fd_open(fd, NULL, 0) == -1) {
int saved_err = errno;
SYS_CLOSE(fd);
diff --git a/lib/libv4l2/Makefile b/lib/libv4l2/Makefile
index d78632f..eb1c019 100644
--- a/lib/libv4l2/Makefile
+++ b/lib/libv4l2/Makefile
@@ -1,8 +1,8 @@
override CPPFLAGS += -I../include -fvisibility=hidden
-LIBS_libv4l2 = -lpthread
+LIBS_libv4l2 = -lpthread -ldl
-V4L2_OBJS = libv4l2.o log.o
+V4L2_OBJS = libv4l2.o v4l2-plugin.o log.o
V4L2CONVERT = v4l2convert.so
V4L2CONVERT_O = v4l2convert.o libv4l2.so
TARGETS = $(V4L2_LIB) libv4l2.pc
diff --git a/lib/libv4l2/libv4l2-priv.h b/lib/libv4l2/libv4l2-priv.h
index 46d6103..ac4ccd6 100644
--- a/lib/libv4l2/libv4l2-priv.h
+++ b/lib/libv4l2/libv4l2-priv.h
@@ -85,8 +85,32 @@ struct v4l2_dev_info {
/* buffer when doing conversion and using read() for read() */
int readbuf_size;
unsigned char *readbuf;
+ struct libv4l2_dev_ops dev_ops;
+ /* plugin info */
+ void *plugin_library;
+ void *plugin_data;
};
+int dev_open(const char *file, int oflag, mode_t mode);
+int dev_close(int fd);
+int dev_ioctl(int fd, unsigned long cmd, void *arg);
+ssize_t dev_read(int fd, void *buf, size_t len);
+void *dev_mmap(void *addr, size_t len, int prot, int flags, int fd, int64_t off);
+int dev_munmap(void *addr, size_t len);
+
+
+LIBV4L_PUBLIC int v4l2_plugin_open(int *plugin_used, const char *file,
+ int oflag, ...);
+LIBV4L_PUBLIC void *v4l2_plugin_mmap(int *plugin_used, void *start,
+ size_t length, int prot, int flags,
+ int fd, int64_t offset);
+LIBV4L_PUBLIC int v4l2_plugin_munmap(int *plugin_used, void *_start,
+ size_t length);
+
+extern struct v4l2_dev_info devices[V4L2_MAX_DEVICES];
+extern pthread_mutex_t v4l2_open_mutex;
+extern int devices_used;
+
/* From log.c */
void v4l2_log_ioctl(unsigned long int request, void *arg, int result);
diff --git a/lib/libv4l2/libv4l2.c b/lib/libv4l2/libv4l2.c
index ab85ea7..e066870 100644
--- a/lib/libv4l2/libv4l2.c
+++ b/lib/libv4l2/libv4l2.c
@@ -67,6 +67,7 @@
#include <sys/stat.h>
#include "libv4l2.h"
#include "libv4l2-priv.h"
+#include "libv4l2-plugin.h"
/* Note these flags are stored together with the flags passed to v4l2_fd_open()
in v4l2_dev_info's flags member, so care should be taken that the do not
@@ -81,14 +82,23 @@
#define V4L2_MMAP_OFFSET_MAGIC 0xABCDEF00u
-static pthread_mutex_t v4l2_open_mutex = PTHREAD_MUTEX_INITIALIZER;
-static struct v4l2_dev_info devices[V4L2_MAX_DEVICES] = {
+pthread_mutex_t v4l2_open_mutex = PTHREAD_MUTEX_INITIALIZER;
+struct v4l2_dev_info devices[V4L2_MAX_DEVICES] = {
{ .fd = -1 },
{ .fd = -1 }, { .fd = -1 }, { .fd = -1 }, { .fd = -1 }, { .fd = -1 },
{ .fd = -1 }, { .fd = -1 }, { .fd = -1 }, { .fd = -1 }, { .fd = -1 },
{ .fd = -1 }, { .fd = -1 }, { .fd = -1 }, { .fd = -1 }, { .fd = -1 }
};
-static int devices_used;
+int devices_used;
+
+struct libv4l2_dev_ops default_operations = {
+ .open = &dev_open,
+ .close = &dev_close,
+ .ioctl = &dev_ioctl,
+ .read = &dev_read,
+ .mmap = &dev_mmap,
+ .munmap = &dev_munmap
+};
static int v4l2_request_read_buffers(int index)
@@ -102,7 +112,8 @@ static int v4l2_request_read_buffers(int index)
devices[index].nreadbuffers;
req.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
req.memory = V4L2_MEMORY_MMAP;
- result = SYS_IOCTL(devices[index].fd, VIDIOC_REQBUFS, &req);
+ result = devices[index].dev_ops.ioctl(devices[index].fd,
+ VIDIOC_REQBUFS, &req);
if (result < 0) {
int saved_err = errno;
@@ -131,7 +142,7 @@ static void v4l2_unrequest_read_buffers(int index)
req.count = 0;
req.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
req.memory = V4L2_MEMORY_MMAP;
- if (SYS_IOCTL(devices[index].fd, VIDIOC_REQBUFS, &req) < 0)
+ if (devices[index].dev_ops.ioctl(devices[index].fd, VIDIOC_REQBUFS, &req) < 0)
return;
devices[index].no_frames = MIN(req.count, V4L2_MAX_NO_FRAMES);
@@ -152,7 +163,8 @@ static int v4l2_map_buffers(int index)
buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
buf.memory = V4L2_MEMORY_MMAP;
buf.index = i;
- result = SYS_IOCTL(devices[index].fd, VIDIOC_QUERYBUF, &buf);
+ result = devices[index].dev_ops.ioctl(devices[index].fd,
+ VIDIOC_QUERYBUF, &buf);
if (result) {
int saved_err = errno;
@@ -202,7 +214,8 @@ static int v4l2_streamon(int index)
enum v4l2_buf_type type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
if (!(devices[index].flags & V4L2_STREAMON)) {
- result = SYS_IOCTL(devices[index].fd, VIDIOC_STREAMON, &type);
+ result = devices[index].dev_ops.ioctl(devices[index].fd,
+ VIDIOC_STREAMON, &type);
if (result) {
int saved_err = errno;
@@ -223,7 +236,8 @@ static int v4l2_streamoff(int index)
enum v4l2_buf_type type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
if (devices[index].flags & V4L2_STREAMON) {
- result = SYS_IOCTL(devices[index].fd, VIDIOC_STREAMOFF, &type);
+ result = devices[index].dev_ops.ioctl(devices[index].fd,
+ VIDIOC_STREAMOFF, &type);
if (result) {
int saved_err = errno;
@@ -252,7 +266,8 @@ static int v4l2_queue_read_buffer(int index, int buffer_index)
buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
buf.memory = V4L2_MEMORY_MMAP;
buf.index = buffer_index;
- result = SYS_IOCTL(devices[index].fd, VIDIOC_QBUF, &buf);
+ result = devices[index].dev_ops.ioctl(devices[index].fd,
+ VIDIOC_QBUF, &buf);
if (result) {
int saved_err = errno;
@@ -277,7 +292,8 @@ static int v4l2_dequeue_and_convert(int index, struct v4l2_buffer *buf,
return result;
do {
- result = SYS_IOCTL(devices[index].fd, VIDIOC_DQBUF, buf);
+ result = devices[index].dev_ops.ioctl(devices[index].fd,
+ VIDIOC_DQBUF, buf);
if (result) {
if (errno != EAGAIN) {
int saved_err = errno;
@@ -356,7 +372,8 @@ static int v4l2_read_and_convert(int index, unsigned char *dest, int dest_size)
}
do {
- result = SYS_READ(devices[index].fd, devices[index].readbuf, buf_size);
+ result = devices[index].dev_ops.read(devices[index].fd,
+ devices[index].readbuf, buf_size);
if (result <= 0) {
if (result && errno != EAGAIN) {
int saved_err = errno;
@@ -496,7 +513,7 @@ static int v4l2_buffers_mapped(int index)
buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
buf.memory = V4L2_MEMORY_MMAP;
buf.index = i;
- if (SYS_IOCTL(devices[index].fd, VIDIOC_QUERYBUF, &buf)) {
+ if (devices[index].dev_ops.ioctl(devices[index].fd, VIDIOC_QUERYBUF, &buf)) {
int saved_err = errno;
V4L2_LOG_ERR("querying buffer %u: %s\n", i, strerror(errno));
@@ -522,7 +539,24 @@ static int v4l2_buffers_mapped(int index)
int v4l2_open(const char *file, int oflag, ...)
{
- int fd;
+ int fd, plugin_used;
+
+ if (oflag & O_CREAT) {
+ va_list ap;
+ mode_t mode;
+
+ va_start(ap, oflag);
+ mode = va_arg(ap, mode_t);
+
+ fd = v4l2_plugin_open(&plugin_used, file, oflag, mode);
+
+ va_end(ap);
+ } else {
+ fd = v4l2_plugin_open(&plugin_used, file, oflag, 0);
+ }
+
+ if (plugin_used)
+ return fd;
/* original open code */
if (oflag & O_CREAT) {
@@ -543,7 +577,7 @@ int v4l2_open(const char *file, int oflag, ...)
if (fd == -1)
return fd;
- if (v4l2_fd_open(fd, 0) == -1) {
+ if (v4l2_fd_open(fd, NULL, 0) == -1) {
int saved_err = errno;
SYS_CLOSE(fd);
@@ -554,7 +588,8 @@ int v4l2_open(const char *file, int oflag, ...)
return fd;
}
-int v4l2_fd_open(int fd, int v4l2_flags)
+int v4l2_fd_open(int fd, struct libv4l2_dev_ops *dev_ops,
+ int v4l2_flags)
{
int i, index;
char *lfname;
@@ -562,6 +597,9 @@ int v4l2_fd_open(int fd, int v4l2_flags)
struct v4l2_format fmt;
struct v4lconvert_data *convert;
+ if (dev_ops == NULL)
+ dev_ops = &default_operations;
+
/* If no log file was set by the app, see if one was specified through the
environment */
if (!v4l2_log_file) {
@@ -571,7 +609,7 @@ int v4l2_fd_open(int fd, int v4l2_flags)
}
/* check that this is an v4l2 device */
- if (SYS_IOCTL(fd, VIDIOC_QUERYCAP, &cap)) {
+ if (dev_ops->ioctl(fd, VIDIOC_QUERYCAP, &cap)) {
int saved_err = errno;
V4L2_LOG_ERR("getting capabilities: %s\n", strerror(errno));
@@ -586,7 +624,7 @@ int v4l2_fd_open(int fd, int v4l2_flags)
/* Get current cam format */
fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
- if (SYS_IOCTL(fd, VIDIOC_G_FMT, &fmt)) {
+ if (dev_ops->ioctl(fd, VIDIOC_G_FMT, &fmt)) {
int saved_err = errno;
V4L2_LOG_ERR("getting pixformat: %s\n", strerror(errno));
@@ -595,15 +633,22 @@ int v4l2_fd_open(int fd, int v4l2_flags)
}
/* init libv4lconvert */
- convert = v4lconvert_create(fd);
+ convert = v4lconvert_create(fd, dev_ops);
if (!convert)
return -1;
/* So we have a v4l2 capture device, register it in our devices array */
pthread_mutex_lock(&v4l2_open_mutex);
for (index = 0; index < V4L2_MAX_DEVICES; index++)
- if (devices[index].fd == -1) {
+ if (devices[index].fd == fd || devices[index].fd == -1) {
devices[index].fd = fd;
+
+ devices[index].dev_ops.open = dev_ops->open;
+ devices[index].dev_ops.close = dev_ops->close;
+ devices[index].dev_ops.ioctl = dev_ops->ioctl;
+ devices[index].dev_ops.read = dev_ops->read;
+ devices[index].dev_ops.mmap = dev_ops->mmap;
+ devices[index].dev_ops.munmap = dev_ops->munmap;
break;
}
pthread_mutex_unlock(&v4l2_open_mutex);
@@ -723,7 +768,7 @@ int v4l2_close(int fd)
/* Since we've marked the fd as no longer used, and freed the resources,
redo the close in case it was interrupted */
do {
- result = SYS_CLOSE(fd);
+ result = devices[index].dev_ops.close(fd);
} while (result == -1 && errno == EINTR);
V4L2_LOG("close: %d\n", fd);
@@ -879,7 +924,7 @@ int v4l2_ioctl(int fd, unsigned long int request, ...)
}
if (!is_capture_request) {
- result = SYS_IOCTL(fd, request, arg);
+ result = devices[index].dev_ops.ioctl(fd, request, arg);
saved_err = errno;
v4l2_log_ioctl(request, arg, result);
errno = saved_err;
@@ -927,7 +972,8 @@ int v4l2_ioctl(int fd, unsigned long int request, ...)
case VIDIOC_QUERYCAP: {
struct v4l2_capability *cap = arg;
- result = SYS_IOCTL(devices[index].fd, VIDIOC_QUERYCAP, cap);
+ result = devices[index].dev_ops.ioctl(devices[index].fd,
+ VIDIOC_QUERYCAP, cap);
if (result == 0)
/* We always support read() as we fake it using mmap mode */
cap->capabilities |= V4L2_CAP_READWRITE;
@@ -977,8 +1023,8 @@ int v4l2_ioctl(int fd, unsigned long int request, ...)
}
if (devices[index].flags & V4L2_DISABLE_CONVERSION) {
- result = SYS_IOCTL(devices[index].fd, VIDIOC_TRY_FMT,
- dest_fmt);
+ result = devices[index].dev_ops.ioctl(devices[index].fd,
+ VIDIOC_TRY_FMT, dest_fmt);
src_fmt = *dest_fmt;
} else {
result = v4lconvert_try_format(devices[index].convert, dest_fmt,
@@ -1018,7 +1064,8 @@ int v4l2_ioctl(int fd, unsigned long int request, ...)
break;
req_pix_fmt = src_fmt.fmt.pix;
- result = SYS_IOCTL(devices[index].fd, VIDIOC_S_FMT, &src_fmt);
+ result = devices[index].dev_ops.ioctl(devices[index].fd,
+ VIDIOC_S_FMT, &src_fmt);
if (result) {
saved_err = errno;
V4L2_LOG_ERR("setting pixformat: %s\n", strerror(errno));
@@ -1067,7 +1114,8 @@ int v4l2_ioctl(int fd, unsigned long int request, ...)
if (req->count > V4L2_MAX_NO_FRAMES)
req->count = V4L2_MAX_NO_FRAMES;
- result = SYS_IOCTL(devices[index].fd, VIDIOC_REQBUFS, req);
+ result = devices[index].dev_ops.ioctl(devices[index].fd,
+ VIDIOC_REQBUFS, req);
if (result < 0)
break;
result = 0; /* some drivers return the number of buffers on success */
@@ -1088,7 +1136,8 @@ int v4l2_ioctl(int fd, unsigned long int request, ...)
/* Do a real query even when converting to let the driver fill in
things like buf->field */
- result = SYS_IOCTL(devices[index].fd, VIDIOC_QUERYBUF, buf);
+ result = devices[index].dev_ops.ioctl(devices[index].fd,
+ VIDIOC_QUERYBUF, buf);
if (result || !v4l2_needs_conversion(index))
break;
@@ -1115,7 +1164,8 @@ int v4l2_ioctl(int fd, unsigned long int request, ...)
break;
}
- result = SYS_IOCTL(devices[index].fd, VIDIOC_QBUF, arg);
+ result = devices[index].dev_ops.ioctl(devices[index].fd,
+ VIDIOC_QBUF, arg);
break;
case VIDIOC_DQBUF: {
@@ -1128,7 +1178,8 @@ int v4l2_ioctl(int fd, unsigned long int request, ...)
}
if (!v4l2_needs_conversion(index)) {
- result = SYS_IOCTL(devices[index].fd, VIDIOC_DQBUF, buf);
+ result = devices[index].dev_ops.ioctl(devices[index].fd,
+ VIDIOC_DQBUF, buf);
if (result) {
int saved_err = errno;
@@ -1187,7 +1238,7 @@ int v4l2_ioctl(int fd, unsigned long int request, ...)
break;
default:
- result = SYS_IOCTL(fd, request, arg);
+ result = devices[index].dev_ops.ioctl(fd, request, arg);
break;
}
@@ -1217,7 +1268,7 @@ ssize_t v4l2_read(int fd, void *dest, size_t n)
it */
if ((devices[index].flags & V4L2_SUPPORTS_READ) &&
!v4l2_needs_conversion(index)) {
- result = SYS_READ(fd, dest, n);
+ result = devices[index].dev_ops.read(fd, dest, n);
goto leave;
}
@@ -1264,10 +1315,16 @@ leave:
void *v4l2_mmap(void *start, size_t length, int prot, int flags, int fd,
int64_t offset)
{
- int index;
+ int index, plugin_used;
unsigned int buffer_index;
void *result;
+ result = v4l2_plugin_mmap(&plugin_used, start, length, prot,
+ flags, fd, offset);
+
+ if (plugin_used)
+ return result;
+
index = v4l2_get_index(fd);
if (index == -1 ||
/* Check if the mmap data matches our answer to QUERY_BUF, if it doesn't
@@ -1329,10 +1386,15 @@ leave:
int v4l2_munmap(void *_start, size_t length)
{
- int index;
+ int index, result, plugin_used;
unsigned int buffer_index;
unsigned char *start = _start;
+ result = v4l2_plugin_munmap(&plugin_used, _start, length);
+
+ if (plugin_used)
+ return result;
+
/* Is this memory ours? */
if (start != MAP_FAILED && length == V4L2_FRAME_BUF_SIZE) {
for (index = 0; index < devices_used; index++)
diff --git a/lib/libv4l2/v4l2-plugin.c b/lib/libv4l2/v4l2-plugin.c
new file mode 100644
index 0000000..22ea315
--- /dev/null
+++ b/lib/libv4l2/v4l2-plugin.c
@@ -0,0 +1,344 @@
+/*
+* Copyright (C) 2010 Nokia Corporation <multimedia@xxxxxxxxx>
+
+* This program is free software; you can redistribute it and/or modify
+* it under the terms of the GNU Lesser General Public License as published by
+* the Free Software Foundation; either version 2.1 of the License, or
+* (at your option) any later version.
+*
+* This program is distributed in the hope that it will be useful,
+* but WITHOUT ANY WARRANTY; without even the implied warranty of
+* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+* Lesser General Public License for more details.
+*
+* You should have received a copy of the GNU Lesser General Public License
+* along with this program; if not, write to the Free Software
+* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+*/
+
+#include <stdarg.h>
+#include <dlfcn.h>
+#include <fcntl.h>
+#include <glob.h>
+#include <sys/stat.h>
+#include <sys/mman.h>
+#include "libv4l2.h"
+#include "libv4l2-priv.h"
+#include "libv4l2-plugin.h"
+
+/* libv4l plugin support:
+ it is provided by functions v4l2_plugin_[open,close,etc].
+
+ When open() is called libv4l dlopens files in /usr/lib[64]/libv4l/plugins
+ 1 at a time and call open callback passing through the applications
+ parameters unmodified.
+
+ If a plugin is relevant for the specified device node, it can indicate so
+ by returning a value other then -1 (the actual file descriptor).
+ As soon as a plugin returns another value then -1 plugin loading stops and
+ information about it (fd and corresponding library handle) is stored. For
+ each function v4l2_[ioctl,read,close,etc] is called corresponding
+ v4l2_plugin_* function which looks if there is loaded plugin for that file
+ and call it's callbacks.
+
+ v4l2_plugin_* function indicates by it's first argument if plugin was used,
+ and if it was not then v4l2_* functions proceed with their usual behavior.
+*/
+
+#define PLUGINS_PATTERN "/usr/lib/libv4l/plugins/*.so"
+
+int dev_open(const char *file, int oflag, mode_t mode)
+{
+ return syscall(SYS_open, (const char *)(file), (int)(oflag),
+ (mode_t)(mode));
+}
+
+int dev_close(int fd)
+{
+ return syscall(SYS_close, (int)(fd));
+}
+
+int dev_ioctl(int fd, unsigned long cmd, void *arg)
+{
+ return syscall(SYS_ioctl, (int)(fd), (unsigned long)(cmd),
+ (void *)(arg));
+}
+
+ssize_t dev_read(int fd, void *buf, size_t len)
+{
+ return syscall(SYS_read, (int)(fd), (void *)(buf), (size_t)(len));
+}
+
+void *dev_mmap(void *addr, size_t len, int prot, int flags, int fd,
+ int64_t off)
+{
+ return (void *)syscall(SYS_mmap2, (void *)(addr), (size_t)(len),
+ (int)(prot), (int)(flags), (int)(fd),
+ (__off_t)((off) >> MMAP2_PAGE_SHIFT));
+}
+
+int dev_munmap(void *addr, size_t len)
+{
+ return syscall(SYS_munmap, (void *)(addr), (size_t)(len));
+}
+
+int v4l2_plugin_open(int *plugin_used, const char *file, int oflag, ...)
+{
+ char *error;
+ int index, fd = -1, glob_ret, plugin_num;
+ void *plugin_library = NULL;
+ struct libv4l2_dev_ops *libv4l2_plugin = NULL;
+ glob_t globbuf;
+
+ pthread_mutex_lock(&v4l2_open_mutex);
+ /* Check if there is empty slot for plugin */
+ for (index = 0; index < V4L2_MAX_DEVICES; index++)
+ if (devices[index].fd == -1)
+ break;
+ pthread_mutex_unlock(&v4l2_open_mutex);
+
+ if (index == V4L2_MAX_DEVICES) {
+ V4L2_LOG_ERR("attempting to open more than %d libv4l plugins\n",
+ V4L2_MAX_DEVICES);
+ *plugin_used = 0;
+ return -1;
+ }
+
+ glob_ret = glob(PLUGINS_PATTERN, 0, NULL, &globbuf);
+
+ if (glob_ret == GLOB_NOSPACE) {
+ *plugin_used = 0;
+ return -1;
+ }
+
+ if (glob_ret == GLOB_ABORTED || glob_ret == GLOB_NOMATCH) {
+ *plugin_used = 0;
+ goto leave;
+ }
+
+ for (plugin_num = 0; plugin_num < globbuf.gl_pathc; plugin_num++) {
+
+ V4L2_LOG("PLUGIN: dlopen(%s);\n", globbuf.gl_pathv[plugin_num]);
+
+ plugin_library = dlopen(globbuf.gl_pathv[plugin_num],
+ RTLD_LAZY);
+
+ if (!plugin_library)
+ continue;
+
+ dlerror(); /* Clear any existing error */
+ libv4l2_plugin = (struct libv4l2_dev_ops *)
+ dlsym(plugin_library, "libv4l2_plugin");
+
+ error = dlerror();
+ if (error != NULL) {
+ V4L2_LOG_ERR("PLUGIN: dlsym failed: %s\n", error);
+ dlclose(plugin_library);
+
+ continue;
+ }
+
+ if (libv4l2_plugin->open == NULL) {
+ fd = -1;
+ } else {
+ if (oflag & O_CREAT) {
+ va_list ap;
+ mode_t mode;
+
+ va_start(ap, oflag);
+ mode = va_arg(ap, mode_t);
+
+ fd = libv4l2_plugin->open(file, oflag, mode);
+
+ va_end(ap);
+ } else {
+ fd = libv4l2_plugin->open(file, oflag, 0);
+ }
+ }
+
+ if (fd != -1) {
+ V4L2_LOG("PLUGIN: plugin open() returned %d\n", fd);
+
+ if (libv4l2_plugin->open == NULL)
+ libv4l2_plugin->open = &dev_open;
+ if (libv4l2_plugin->close == NULL)
+ libv4l2_plugin->close = &dev_close;
+ if (libv4l2_plugin->ioctl == NULL)
+ libv4l2_plugin->ioctl = &dev_ioctl;
+ if (libv4l2_plugin->read == NULL)
+ libv4l2_plugin->read = &dev_read;
+ if (libv4l2_plugin->mmap == NULL)
+ libv4l2_plugin->mmap = &dev_mmap;
+ if (libv4l2_plugin->munmap == NULL)
+ libv4l2_plugin->munmap = &dev_munmap;
+
+ v4l2_fd_open(fd, libv4l2_plugin, 0);
+
+ for (index = 0; index < V4L2_MAX_DEVICES; index++)
+ if (devices[index].fd == fd)
+ break;
+
+ /* The fd was not stored in devices[] array */
+ if (index == V4L2_MAX_DEVICES) {
+ libv4l2_plugin->close(fd);
+ dlclose(plugin_library);
+ fd = -1;
+ goto leave;
+ }
+
+ pthread_mutex_lock(&v4l2_open_mutex);
+ devices[index].plugin_library = plugin_library;
+ pthread_mutex_unlock(&v4l2_open_mutex);
+
+ break;
+ } else {
+ V4L2_LOG("PLUGIN: plugin open() returned -1\n");
+ dlclose(plugin_library);
+ plugin_library = NULL;
+ }
+
+ }
+
+leave:
+ globfree(&globbuf);
+
+ if (fd == -1)
+ *plugin_used = 0;
+ else
+ *plugin_used = 1;
+
+ return fd;
+}
+
+void *v4l2_plugin_mmap(int *plugin_used, void *start, size_t length, int prot,
+ int flags, int fd, int64_t offset)
+{
+ int index, i;
+ void *result = NULL;
+ void *plugin_library = NULL;
+ struct libv4l2_dev_ops *libv4l2_plugin = NULL;
+
+ pthread_mutex_lock(&v4l2_open_mutex);
+ for (index = 0; index < V4L2_MAX_DEVICES; index++)
+ if (devices[index].fd == fd) {
+ plugin_library = devices[index].plugin_library;
+ libv4l2_plugin = &(devices[index].dev_ops);
+ break;
+ }
+
+ if (fd == -1 || index == V4L2_MAX_DEVICES ||
+ libv4l2_plugin == NULL ||
+ libv4l2_plugin->mmap == NULL) {
+ *plugin_used = 0;
+ } else {
+ for (i = 0; i < V4L2_MAX_NO_FRAMES; i++)
+ if (devices[index].frame_pointers[i] == MAP_FAILED)
+ break;
+
+ if (i == V4L2_MAX_NO_FRAMES) {
+ *plugin_used = 0;
+ result = NULL;
+ goto leave;
+ }
+
+ result = libv4l2_plugin->mmap(start, length, prot,
+ flags, fd, offset);
+ if (result) {
+ devices[index].frame_pointers[i] = result;
+ devices[index].frame_sizes[i] = length;
+ *plugin_used = 1;
+ } else {
+ *plugin_used = 0;
+ }
+ }
+
+leave:
+ pthread_mutex_unlock(&v4l2_open_mutex);
+
+ return result;
+}
+
+int v4l2_plugin_munmap(int *plugin_used, void *_start, size_t length)
+{
+ int index, map, result = 0;
+ void *plugin_library = NULL;
+ struct libv4l2_dev_ops *libv4l2_plugin = NULL;
+
+ pthread_mutex_lock(&v4l2_open_mutex);
+ for (index = 0; index < V4L2_MAX_DEVICES; index++) {
+ for (map = 0; map < V4L2_MAX_NO_FRAMES; map++) {
+ if (devices[index].frame_pointers[map] == _start &&
+ devices[index].frame_sizes[map] == length) {
+
+ plugin_library = devices[index].plugin_library;
+ libv4l2_plugin = &(devices[index].dev_ops);
+ devices[index].frame_pointers[map] = MAP_FAILED;
+ devices[index].frame_sizes[map] = 0;
+ break;
+ }
+ }
+ if (plugin_library)
+ break;
+ }
+
+ if (plugin_library) {
+ result = libv4l2_plugin->munmap(_start, length);
+
+ if (result)
+ *plugin_used = 0;
+ else
+ *plugin_used = 1;
+
+ } else {
+ *plugin_used = 0;
+ }
+
+ pthread_mutex_unlock(&v4l2_open_mutex);
+
+ return result;
+}
+
+LIBV4L_PUBLIC void libv4l2_set_plugindata(int fd, void *plugin_data)
+{
+ int index;
+
+ pthread_mutex_lock(&v4l2_open_mutex);
+ for (index = 0; index < V4L2_MAX_DEVICES; index++)
+ if (devices[index].fd == fd)
+ break;
+
+ /* We have no info about this fd - reserve an empty slot */
+ if (index == V4L2_MAX_DEVICES) {
+ for (index = 0; index < V4L2_MAX_DEVICES; index++)
+ if (devices[index].fd == -1)
+ break;
+ }
+ pthread_mutex_unlock(&v4l2_open_mutex);
+
+ if (index == V4L2_MAX_DEVICES) {
+ V4L2_LOG_ERR("store private data for more than %d plugins\n",
+ V4L2_MAX_DEVICES);
+ return;
+ }
+
+ pthread_mutex_lock(&v4l2_open_mutex);
+ devices[index].fd = fd;
+ devices[index].plugin_data = plugin_data;
+ pthread_mutex_unlock(&v4l2_open_mutex);
+}
+
+LIBV4L_PUBLIC void *libv4l2_get_plugindata(int fd)
+{
+ int index;
+ void *result = NULL;
+
+ pthread_mutex_lock(&v4l2_open_mutex);
+ for (index = 0; index < V4L2_MAX_DEVICES; index++)
+ if (devices[index].fd == fd) {
+ result = devices[index].plugin_data;
+ break;
+ }
+ pthread_mutex_unlock(&v4l2_open_mutex);
+
+ return result;
+}
diff --git a/lib/libv4l2/v4l2convert.c b/lib/libv4l2/v4l2convert.c
index e251085..820c8ae 100644
--- a/lib/libv4l2/v4l2convert.c
+++ b/lib/libv4l2/v4l2convert.c
@@ -31,6 +31,8 @@
#include "../libv4lconvert/libv4lsyscall-priv.h"
#include <linux/videodev2.h>
#include <libv4l2.h>
+#include "libv4l2-plugin.h"
+#include "libv4l2-priv.h"
/* Check that open/read/mmap is not a define */
#if defined open || defined read || defined mmap
@@ -45,10 +47,27 @@
LIBV4L_PUBLIC int open(const char *file, int oflag, ...)
{
- int fd;
+ int fd, plugin_used;
struct v4l2_capability cap;
int v4l_device = 0;
+ if (oflag & O_CREAT) {
+ va_list ap;
+ mode_t mode;
+
+ va_start(ap, oflag);
+ mode = va_arg(ap, mode_t);
+
+ fd = v4l2_plugin_open(&plugin_used, file, oflag, mode);
+
+ va_end(ap);
+ } else {
+ fd = v4l2_plugin_open(&plugin_used, file, oflag, 0);
+ }
+
+ if (plugin_used)
+ return fd;
+
/* check if we're opening a video4linux2 device */
if (!strncmp(file, "/dev/video", 10) || !strncmp(file, "/dev/v4l/", 9)) {
/* Some apps open the device read only, but we need rw rights as the
@@ -86,7 +105,7 @@ LIBV4L_PUBLIC int open(const char *file, int oflag, ...)
/* Try to Register with libv4l2 (in case of failure pass the fd to the
application as is) */
- v4l2_fd_open(fd, 0);
+ v4l2_fd_open(fd, NULL, 0);
return fd;
}
diff --git a/lib/libv4lconvert/control/libv4lcontrol-priv.h b/lib/libv4lconvert/control/libv4lcontrol-priv.h
index 22cdf34..3a392e4 100644
--- a/lib/libv4lconvert/control/libv4lcontrol-priv.h
+++ b/lib/libv4lconvert/control/libv4lcontrol-priv.h
@@ -22,6 +22,8 @@
#ifndef __LIBV4LCONTROL_PRIV_H
#define __LIBV4LCONTROL_PRIV_H
+#include "libv4l2-plugin.h"
+
#define V4LCONTROL_SHM_SIZE 4096
#define V4LCONTROL_SUPPORTS_NEXT_CTRL 0x01
@@ -37,6 +39,7 @@ struct v4lcontrol_data {
unsigned int *shm_values; /* shared memory control value store */
unsigned int old_values[V4LCONTROL_COUNT]; /* for controls_changed() */
const struct v4lcontrol_flags_info *flags_info;
+ struct libv4l2_dev_ops *dev_ops;
};
struct v4lcontrol_flags_info {
diff --git a/lib/libv4lconvert/control/libv4lcontrol.c b/lib/libv4lconvert/control/libv4lcontrol.c
index d91d8e6..6e12e59 100644
--- a/lib/libv4lconvert/control/libv4lcontrol.c
+++ b/lib/libv4lconvert/control/libv4lcontrol.c
@@ -679,7 +679,8 @@ static void v4lcontrol_get_flags_from_db(struct v4lcontrol_data *data,
}
}
-struct v4lcontrol_data *v4lcontrol_create(int fd, int always_needs_conversion)
+struct v4lcontrol_data *v4lcontrol_create(int fd,
+ struct libv4l2_dev_ops *dev_ops, int always_needs_conversion)
{
int shm_fd;
int i, rc, got_usb_ids, init = 0;
@@ -699,10 +700,11 @@ struct v4lcontrol_data *v4lcontrol_create(int fd, int always_needs_conversion)
}
data->fd = fd;
+ data->dev_ops = dev_ops;
/* Check if the driver has indicated some form of flipping is needed */
- if ((SYS_IOCTL(data->fd, VIDIOC_G_INPUT, &input.index) == 0) &&
- (SYS_IOCTL(data->fd, VIDIOC_ENUMINPUT, &input) == 0)) {
+ if ((data->dev_ops->ioctl(data->fd, VIDIOC_G_INPUT, &input.index) == 0) &&
+ (data->dev_ops->ioctl(data->fd, VIDIOC_ENUMINPUT, &input) == 0)) {
if (input.status & V4L2_IN_ST_HFLIP)
data->flags |= V4LCONTROL_HFLIPPED;
if (input.status & V4L2_IN_ST_VFLIP)
@@ -719,7 +721,7 @@ struct v4lcontrol_data *v4lcontrol_create(int fd, int always_needs_conversion)
data->flags = strtol(s, NULL, 0);
ctrl.id = V4L2_CTRL_FLAG_NEXT_CTRL;
- if (SYS_IOCTL(data->fd, VIDIOC_QUERYCTRL, &ctrl) == 0)
+ if (data->dev_ops->ioctl(data->fd, VIDIOC_QUERYCTRL, &ctrl) == 0)
data->priv_flags |= V4LCONTROL_SUPPORTS_NEXT_CTRL;
/* If the device always needs conversion, we can add fake controls at no cost
@@ -727,7 +729,7 @@ struct v4lcontrol_data *v4lcontrol_create(int fd, int always_needs_conversion)
if (always_needs_conversion || v4lcontrol_needs_conversion(data)) {
for (i = 0; i < V4LCONTROL_AUTO_ENABLE_COUNT; i++) {
ctrl.id = fake_controls[i].id;
- rc = SYS_IOCTL(data->fd, VIDIOC_QUERYCTRL, &ctrl);
+ rc = data->dev_ops->ioctl(data->fd, VIDIOC_QUERYCTRL, &ctrl);
if (rc == -1 || (rc == 0 && (ctrl.flags & V4L2_CTRL_FLAG_DISABLED)))
data->controls |= 1 << i;
}
@@ -739,17 +741,17 @@ struct v4lcontrol_data *v4lcontrol_create(int fd, int always_needs_conversion)
different sensors with / without autogain or the necessary controls. */
while (data->flags & V4LCONTROL_WANTS_AUTOGAIN) {
ctrl.id = V4L2_CID_AUTOGAIN;
- rc = SYS_IOCTL(data->fd, VIDIOC_QUERYCTRL, &ctrl);
+ rc = data->dev_ops->ioctl(data->fd, VIDIOC_QUERYCTRL, &ctrl);
if (rc == 0 && !(ctrl.flags & V4L2_CTRL_FLAG_DISABLED))
break;
ctrl.id = V4L2_CID_EXPOSURE;
- rc = SYS_IOCTL(data->fd, VIDIOC_QUERYCTRL, &ctrl);
+ rc = data->dev_ops->ioctl(data->fd, VIDIOC_QUERYCTRL, &ctrl);
if (rc != 0 || (ctrl.flags & V4L2_CTRL_FLAG_DISABLED))
break;
ctrl.id = V4L2_CID_GAIN;
- rc = SYS_IOCTL(data->fd, VIDIOC_QUERYCTRL, &ctrl);
+ rc = data->dev_ops->ioctl(data->fd, VIDIOC_QUERYCTRL, &ctrl);
if (rc != 0 || (ctrl.flags & V4L2_CTRL_FLAG_DISABLED))
break;
@@ -766,7 +768,7 @@ struct v4lcontrol_data *v4lcontrol_create(int fd, int always_needs_conversion)
if (data->controls == 0)
return data; /* No need to create a shared memory segment */
- if (SYS_IOCTL(fd, VIDIOC_QUERYCAP, &cap)) {
+ if (data->dev_ops->ioctl(fd, VIDIOC_QUERYCAP, &cap)) {
perror("libv4lcontrol: error querying device capabilities");
goto error;
}
@@ -952,7 +954,7 @@ int v4lcontrol_vidioc_queryctrl(struct v4lcontrol_data *data, void *arg)
}
/* find out what the kernel driver would respond. */
- retval = SYS_IOCTL(data->fd, VIDIOC_QUERYCTRL, arg);
+ retval = data->dev_ops->ioctl(data->fd, VIDIOC_QUERYCTRL, arg);
if ((data->priv_flags & V4LCONTROL_SUPPORTS_NEXT_CTRL) &&
(orig_id & V4L2_CTRL_FLAG_NEXT_CTRL)) {
@@ -989,7 +991,7 @@ int v4lcontrol_vidioc_g_ctrl(struct v4lcontrol_data *data, void *arg)
return 0;
}
- return SYS_IOCTL(data->fd, VIDIOC_G_CTRL, arg);
+ return data->dev_ops->ioctl(data->fd, VIDIOC_G_CTRL, arg);
}
int v4lcontrol_vidioc_s_ctrl(struct v4lcontrol_data *data, void *arg)
@@ -1010,7 +1012,7 @@ int v4lcontrol_vidioc_s_ctrl(struct v4lcontrol_data *data, void *arg)
return 0;
}
- return SYS_IOCTL(data->fd, VIDIOC_S_CTRL, arg);
+ return data->dev_ops->ioctl(data->fd, VIDIOC_S_CTRL, arg);
}
int v4lcontrol_get_flags(struct v4lcontrol_data *data)
diff --git a/lib/libv4lconvert/control/libv4lcontrol.h b/lib/libv4lconvert/control/libv4lcontrol.h
index 974e97a..770804a 100644
--- a/lib/libv4lconvert/control/libv4lcontrol.h
+++ b/lib/libv4lconvert/control/libv4lcontrol.h
@@ -22,6 +22,8 @@
#ifndef __LIBV4LCONTROL_H
#define __LIBV4LCONTROL_H
+#include "libv4l2-plugin.h"
+
/* Flags */
#define V4LCONTROL_HFLIPPED 0x01
#define V4LCONTROL_VFLIPPED 0x02
@@ -47,7 +49,8 @@ enum {
struct v4lcontrol_data;
-struct v4lcontrol_data *v4lcontrol_create(int fd, int always_needs_conversion);
+struct v4lcontrol_data *v4lcontrol_create(int fd,
+ struct libv4l2_dev_ops *dev_ops, int always_needs_conversion);
void v4lcontrol_destroy(struct v4lcontrol_data *data);
/* Functions used by v4lprocessing to get the control state */
diff --git a/lib/libv4lconvert/libv4lconvert-priv.h b/lib/libv4lconvert/libv4lconvert-priv.h
index d8fe899..0b1e3e7 100644
--- a/lib/libv4lconvert/libv4lconvert-priv.h
+++ b/lib/libv4lconvert/libv4lconvert-priv.h
@@ -65,6 +65,7 @@ struct v4lconvert_data {
unsigned char *convert_pixfmt_buf;
struct v4lcontrol_data *control;
struct v4lprocessing_data *processing;
+ struct libv4l2_dev_ops *dev_ops;
/* Data for external decompression helpers code */
pid_t decompress_pid;
diff --git a/lib/libv4lconvert/libv4lconvert.c b/lib/libv4lconvert/libv4lconvert.c
index 0d8b29f..c27401f 100644
--- a/lib/libv4lconvert/libv4lconvert.c
+++ b/lib/libv4lconvert/libv4lconvert.c
@@ -91,7 +91,8 @@ static const int v4lconvert_crop_res[][2] = {
{ 176, 144 },
};
-struct v4lconvert_data *v4lconvert_create(int fd)
+struct v4lconvert_data *v4lconvert_create(int fd,
+ struct libv4l2_dev_ops *dev_ops)
{
int i, j;
struct v4lconvert_data *data = calloc(1, sizeof(struct v4lconvert_data));
@@ -107,6 +108,7 @@ struct v4lconvert_data *v4lconvert_create(int fd)
}
data->fd = fd;
+ data->dev_ops = dev_ops;
data->decompress_pid = -1;
/* Check supported formats */
@@ -115,7 +117,7 @@ struct v4lconvert_data *v4lconvert_create(int fd)
fmt.index = i;
- if (SYS_IOCTL(data->fd, VIDIOC_ENUM_FMT, &fmt))
+ if (data->dev_ops->ioctl(data->fd, VIDIOC_ENUM_FMT, &fmt))
break;
for (j = 0; j < ARRAY_SIZE(supported_src_pixfmts); j++)
@@ -134,7 +136,7 @@ struct v4lconvert_data *v4lconvert_create(int fd)
data->no_formats = i;
/* Check if this cam has any special flags */
- if (SYS_IOCTL(data->fd, VIDIOC_QUERYCAP, &cap) == 0) {
+ if (data->dev_ops->ioctl(data->fd, VIDIOC_QUERYCAP, &cap) == 0) {
if (!strcmp((char *)cap.driver, "uvcvideo"))
data->flags |= V4LCONVERT_IS_UVC;
@@ -142,7 +144,7 @@ struct v4lconvert_data *v4lconvert_create(int fd)
always_needs_conversion = 0;
}
- data->control = v4lcontrol_create(fd, always_needs_conversion);
+ data->control = v4lcontrol_create(fd, dev_ops, always_needs_conversion);
if (!data->control) {
free(data);
return NULL;
@@ -205,7 +207,7 @@ int v4lconvert_enum_fmt(struct v4lconvert_data *data, struct v4l2_fmtdesc *fmt)
if (fmt->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
(!v4lconvert_supported_dst_fmt_only(data) &&
fmt->index < data->no_formats))
- return SYS_IOCTL(data->fd, VIDIOC_ENUM_FMT, fmt);
+ return data->dev_ops->ioctl(data->fd, VIDIOC_ENUM_FMT, fmt);
for (i = 0; i < ARRAY_SIZE(supported_dst_pixfmts); i++)
if (v4lconvert_supported_dst_fmt_only(data) ||
@@ -313,7 +315,7 @@ static int v4lconvert_do_try_format(struct v4lconvert_data *data,
try_fmt = *dest_fmt;
try_fmt.fmt.pix.pixelformat = supported_src_pixfmts[i].fmt;
- if (!SYS_IOCTL(data->fd, VIDIOC_TRY_FMT, &try_fmt)) {
+ if (!data->dev_ops->ioctl(data->fd, VIDIOC_TRY_FMT, &try_fmt)) {
if (try_fmt.fmt.pix.pixelformat == supported_src_pixfmts[i].fmt) {
int size_x_diff = abs((int)try_fmt.fmt.pix.width -
(int)dest_fmt->fmt.pix.width);
@@ -381,7 +383,7 @@ int v4lconvert_try_format(struct v4lconvert_data *data,
if (!v4lconvert_supported_dst_format(dest_fmt->fmt.pix.pixelformat) ||
dest_fmt->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
v4lconvert_do_try_format(data, &try_dest, &try_src)) {
- result = SYS_IOCTL(data->fd, VIDIOC_TRY_FMT, dest_fmt);
+ result = data->dev_ops->ioctl(data->fd, VIDIOC_TRY_FMT, dest_fmt);
if (src_fmt)
*src_fmt = *dest_fmt;
return result;
@@ -1236,7 +1238,7 @@ static void v4lconvert_get_framesizes(struct v4lconvert_data *data,
for (i = 0; ; i++) {
frmsize.index = i;
- if (SYS_IOCTL(data->fd, VIDIOC_ENUM_FRAMESIZES, &frmsize))
+ if (data->dev_ops->ioctl(data->fd, VIDIOC_ENUM_FRAMESIZES, &frmsize))
break;
/* We got a framesize, check we don't have the same one already */
@@ -1296,7 +1298,7 @@ int v4lconvert_enum_framesizes(struct v4lconvert_data *data,
errno = EINVAL;
return -1;
}
- return SYS_IOCTL(data->fd, VIDIOC_ENUM_FRAMESIZES, frmsize);
+ return data->dev_ops->ioctl(data->fd, VIDIOC_ENUM_FRAMESIZES, frmsize);
}
if (frmsize->index >= data->no_framesizes) {
@@ -1332,7 +1334,8 @@ int v4lconvert_enum_frameintervals(struct v4lconvert_data *data,
errno = EINVAL;
return -1;
}
- res = SYS_IOCTL(data->fd, VIDIOC_ENUM_FRAMEINTERVALS, frmival);
+ res = data->dev_ops->ioctl(data->fd, VIDIOC_ENUM_FRAMEINTERVALS,
+ frmival);
if (res)
V4LCONVERT_ERR("%s\n", strerror(errno));
return res;
@@ -1377,7 +1380,7 @@ int v4lconvert_enum_frameintervals(struct v4lconvert_data *data,
frmival->pixel_format = src_fmt.fmt.pix.pixelformat;
frmival->width = src_fmt.fmt.pix.width;
frmival->height = src_fmt.fmt.pix.height;
- res = SYS_IOCTL(data->fd, VIDIOC_ENUM_FRAMEINTERVALS, frmival);
+ res = data->dev_ops->ioctl(data->fd, VIDIOC_ENUM_FRAMEINTERVALS, frmival);
if (res) {
int dest_pixfmt = dest_fmt.fmt.pix.pixelformat;
int src_pixfmt = src_fmt.fmt.pix.pixelformat;
--
1.7.3.1
--
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