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authorLaurent Pinchart <laurent.pinchart@ideasonboard.com>2014-11-18 22:52:06 +0200
committerLaurent Pinchart <laurent.pinchart@ideasonboard.com>2016-05-24 03:03:01 +0300
commitc9601d407a7ca943e53fa49a5a5f69b868c6ed11 (patch)
tree248d13a9e817ba3c73fc50e2d655b4cd12013e10
parent3653f5e4d877176a30035d9123ac65daf46ba787 (diff)
Xilinx video library - Initial importHEADmaster
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
-rw-r--r--.gitignore4
-rw-r--r--COPYING.LGPL502
-rw-r--r--Makefile23
-rw-r--r--doc/Doxyfile9
-rw-r--r--doc/Makefile7
-rw-r--r--include/xlnx-events.h43
-rw-r--r--include/xlnx-list.h99
-rw-r--r--include/xlnx-plugin.h93
-rw-r--r--include/xlnx-tools.h70
-rw-r--r--include/xlnx-video.h129
-rw-r--r--lib/Makefile26
-rw-r--r--lib/xlnx-buffers.c80
-rw-r--r--lib/xlnx-buffers.h83
-rw-r--r--lib/xlnx-events.c269
-rw-r--r--lib/xlnx-plugin.c220
-rw-r--r--lib/xlnx-priv.h107
-rw-r--r--lib/xlnx-video.c388
-rw-r--r--plugins/Makefile12
-rw-r--r--plugins/dummy/Makefile21
-rw-r--r--plugins/dummy/xlnx-dummy.c42
-rw-r--r--plugins/v4l2/Makefile22
-rw-r--r--plugins/v4l2/v4l2.c721
-rw-r--r--plugins/v4l2/v4l2.h289
-rw-r--r--plugins/v4l2/xlnx-v4l2.c417
-rw-r--r--src/Makefile22
-rw-r--r--src/main.c213
26 files changed, 3911 insertions, 0 deletions
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..5ed8b1e
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,4 @@
+*.o
+*.so
+doc/html
+src/xlnx-video
diff --git a/COPYING.LGPL b/COPYING.LGPL
new file mode 100644
index 0000000..4362b49
--- /dev/null
+++ b/COPYING.LGPL
@@ -0,0 +1,502 @@
+ GNU LESSER GENERAL PUBLIC LICENSE
+ Version 2.1, February 1999
+
+ Copyright (C) 1991, 1999 Free Software Foundation, Inc.
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diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..2b1058b
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,23 @@
+SUBDIRS := 3rdparty doc lib plugins src
+
+export topdir := $(PWD)
+
+all: all-recursive
+
+clean: clean-recursive
+
+doc:
+ $(MAKE) -C doc $@
+
+install: install-recursive
+
+.PHONY: doc
+
+recursive=all-recursive clean-recursive install-recursive
+
+$(recursive):
+ @target=`echo $@ | sed s/-recursive//` ; \
+ for subdir in $(SUBDIRS); do \
+ echo "Making $$target in $$subdir" ; \
+ $(MAKE) -C $$subdir $$target; \
+ done
diff --git a/doc/Doxyfile b/doc/Doxyfile
new file mode 100644
index 0000000..370364b
--- /dev/null
+++ b/doc/Doxyfile
@@ -0,0 +1,9 @@
+PROJECT_NAME = "Xilinx Video Library"
+OUTPUT_DIRECTORY = ./
+OPTIMIZE_OUTPUT_FOR_C = YES
+EXTRACT_LOCAL_CLASSES = NO
+INPUT = ../include ../lib
+EXCLUDE_PATTERNS = */include/xlnx-list.h */include/xlnx-tools.h
+EXCLUDE_PATTERNS += */lib/xlnx-list.c */lib/xlnx-tools.c
+EXCLUDE_PATTERNS += */lib/*.h
+GENERATE_LATEX = NO
diff --git a/doc/Makefile b/doc/Makefile
new file mode 100644
index 0000000..27f225b
--- /dev/null
+++ b/doc/Makefile
@@ -0,0 +1,7 @@
+all:
+
+doc:
+ doxygen Doxyfile
+
+clean:
+ rm -rf html
diff --git a/include/xlnx-events.h b/include/xlnx-events.h
new file mode 100644
index 0000000..ebf575d
--- /dev/null
+++ b/include/xlnx-events.h
@@ -0,0 +1,43 @@
+/*
+ * Xilinx Video Library - select()-based generic event loop
+ *
+ * Copyright (C) 2014-2016 Ideas on board Oy
+ *
+ * Contact: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the Free
+ * Software Foundation; either version 2 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 General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef __XLNX_EVENTS_H__
+#define __XLNX_EVENTS_H__
+
+/**
+ * \file
+ * \brief select()-based event loop implementation
+ *
+ * This event loop is a sample event handling operations implementation. It
+ * registers event handler operations with the library context and implements an
+ * infinite event loop based on the select() function to wait for events on
+ * file descriptors.
+ */
+
+struct xlnx_video;
+
+int xlnx_events_init(struct xlnx_video *xv);
+void xlnx_events_fini(struct xlnx_video *xv);
+bool xlnx_events_loop(struct xlnx_video *xv);
+void xlnx_events_stop(struct xlnx_video *xv);
+
+#endif /* __XLNX_EVENTS_H__ */
diff --git a/include/xlnx-list.h b/include/xlnx-list.h
new file mode 100644
index 0000000..f23ab24
--- /dev/null
+++ b/include/xlnx-list.h
@@ -0,0 +1,99 @@
+/*
+ * Xilinx Video Library - Double linked lists
+ *
+ * Copyright (C) 2014-2016 Ideas on board Oy
+ *
+ * Contact: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
+ *
+ * This library 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 library 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 General Public License for
+ * more details.
+ */
+
+#ifndef __XLNX_LIST_H__
+#define __XLNX_LIST_H__
+
+#include <stddef.h>
+
+struct list_entry {
+ struct list_entry *prev;
+ struct list_entry *next;
+};
+
+static inline void list_init(struct list_entry *list)
+{
+ list->next = list;
+ list->prev = list;
+}
+
+static inline int list_empty(struct list_entry *list)
+{
+ return list->next == list;
+}
+
+static inline void list_append(struct list_entry *entry, struct list_entry *list)
+{
+ entry->next = list;
+ entry->prev = list->prev;
+ list->prev->next = entry;
+ list->prev = entry;
+}
+
+static inline void list_prepend(struct list_entry *entry, struct list_entry *list)
+{
+ entry->next = list->next;
+ entry->prev = list;
+ list->next->prev = entry;
+ list->next = entry;
+}
+
+static inline void list_insert_after(struct list_entry *entry, struct list_entry *after)
+{
+ list_prepend(entry, after);
+}
+
+static inline void list_insert_before(struct list_entry *entry, struct list_entry *before)
+{
+ list_append(entry, before);
+}
+
+static inline void list_remove(struct list_entry *entry)
+{
+ entry->prev->next = entry->next;
+ entry->next->prev = entry->prev;
+}
+
+#define list_entry(entry, type, member) \
+ (type *)((char *)(entry) - offsetof(type, member))
+
+#define list_first_entry(list, type, member) \
+ list_entry((list)->next, type, member)
+
+#define list_last_entry(list, type, member) \
+ list_entry((list)->prev, type, member)
+
+#define list_for_each(entry, list) \
+ for (entry = (list)->next; entry != (list); entry = entry->next)
+
+#define list_for_each_entry(entry, list, member) \
+ for (entry = list_entry((list)->next, typeof(*entry), member); \
+ &entry->member != (list); \
+ entry = list_entry(entry->member.next, typeof(*entry), member))
+
+#define list_for_each_safe(entry, __next, list) \
+ for (entry = (list)->next, __next = entry->next; entry != (list); \
+ entry = __next, __next = entry->next)
+
+#define list_for_each_entry_safe(entry, __next, list, member) \
+ for (entry = list_entry((list)->next, typeof(*entry), member), \
+ __next = list_entry(entry->member.next, typeof(*entry), member); \
+ &entry->member != (list); \
+ entry = __next, __next = list_entry(entry->member.next, typeof(*entry), member))
+
+#endif /* __XLNX_LIST_H__ */
diff --git a/include/xlnx-plugin.h b/include/xlnx-plugin.h
new file mode 100644
index 0000000..ff39fed
--- /dev/null
+++ b/include/xlnx-plugin.h
@@ -0,0 +1,93 @@
+/*
+ * Xilinx Video Library - Plugin API
+ *
+ * Copyright (C) 2014-2016 Ideas on board Oy
+ *
+ * Contact: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
+ *
+ * This library 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 library 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 General Public License for
+ * more details.
+ */
+
+#ifndef __XLNX_PLUGIN_H__
+#define __XLNX_PLUGIN_H__
+
+/**
+ * \file
+ * \brief Library plugin support
+ *
+ * To be discovered by the Xilinx video library, plugins must export a plugin
+ * operations structure with a well-defined symbol name. Plugins should use the
+ * EXPORT_XLNX_VIDEO_PLUGIN() macro to declare the strucure and initialize its
+ * members with function pointers.
+ *
+ * \code{.c}
+ * EXPORT_XLNX_VIDEO_PLUGIN(myplugin) = {
+ * .info = myplugin_info,
+ * .scan = myplugin_scan,
+ * }
+ * \endcode
+ */
+
+#include <xlnx-video.h>
+
+struct media_device;
+struct xlnx_video_compoment;
+
+/**
+ * \brief Type of video component supported by the plugin
+ */
+enum xlnx_video_plugin_type {
+ /**
+ * Hardware video component, handled automatically when the plugin is
+ * loaded or the component discovered.
+ */
+ XLNX_VIDEO_PLUGIN_TYPE_HARDWARE,
+ /**
+ * Software video component, instantiated manually.
+ */
+ XLNX_VIDEO_PLUGIN_TYPE_SOFTWARE,
+};
+
+/**
+ * \brief Plugin information
+ */
+struct xlnx_video_plugin_info {
+ /** Plugin name */
+ const char *name;
+ /** Plugin type, one of XLNX_VIDEO_PLUGIN_TYPE_* */
+ enum xlnx_video_plugin_type type;
+};
+
+/**
+ * \brief Xilinx video plugin operations
+ */
+struct xlnx_video_plugin_ops {
+ /**
+ * Query plugin information. The returned structure must be valid for
+ * the lifetime of the plugin.
+ */
+ const struct xlnx_video_plugin_info *(*info)(void);
+ struct xlnx_video_component *(*scan)(struct xlnx_video *xv,
+ struct media_device *mdev);
+ struct xlnx_video_component *(*create_component)(struct xlnx_video *xv);
+ void (*destroy_component)(struct xlnx_video *xv,
+ struct xlnx_video_compoment *xvcomp);
+ /** Reserved fields for ABI compatibility, must be set to NULL. */
+ void (*reserved[10])(void);
+};
+
+/** \cond IGNORE */
+#define XLNX_VIDEO_PLUGIN_SYMBOL __xlnx_video_plugin
+#define EXPORT_XLNX_VIDEO_PLUGIN(name) \
+const struct xlnx_video_plugin_ops XLNX_VIDEO_PLUGIN_SYMBOL
+/** \endcond */
+
+#endif /* __XLNX_PLUGIN_H__ */
diff --git a/include/xlnx-tools.h b/include/xlnx-tools.h
new file mode 100644
index 0000000..799d915
--- /dev/null
+++ b/include/xlnx-tools.h
@@ -0,0 +1,70 @@
+/*
+ * Xilinx Video Library - Tools
+ *
+ * Copyright (C) 2014-2016 Ideas on board Oy
+ *
+ * Contact: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
+ *
+ * This library 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 library 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 General Public License for
+ * more details.
+ */
+
+#ifndef __XLNX_TOOLS_H__
+#define __XLNX_TOOLS_H__
+
+#define ARRAY_SIZE(array) (sizeof(array) / sizeof((array)[0]))
+#define FIELD_SIZEOF(t, f) (sizeof(((t*)0)->f))
+
+#define min(a, b) ({ \
+ typeof(a) __a = (a); \
+ typeof(b) __b = (b); \
+ __a < __b ? __a : __b; \
+})
+
+#define min_t(type, a, b) ({ \
+ type __a = (a); \
+ type __b = (b); \
+ __a < __b ? __a : __b; \
+})
+
+#define max(a, b) ({ \
+ typeof(a) __a = (a); \
+ typeof(b) __b = (b); \
+ __a > __b ? __a : __b; \
+})
+
+#define max_t(type, a, b) ({ \
+ type __a = (a); \
+ type __b = (b); \
+ __a > __b ? __a : __b; \
+})
+
+#define clamp(val, min, max) ({ \
+ typeof(val) __val = (val); \
+ typeof(min) __min = (min); \
+ typeof(max) __max = (max); \
+ __val = __val < __min ? __min : __val; \
+ __val > __max ? __max : __val; \
+})
+
+#define clamp_t(type, val, min, max) ({ \
+ type __val = (val); \
+ type __min = (min); \
+ type __max = (max); \
+ __val = __val < __min ? __min : __val; \
+ __val > __max ? __max : __val; \
+})
+
+#define div_round_up(num, denom) (((num) + (denom) - 1) / (denom))
+
+#define container_of(ptr, type, member) \
+ (type *)((char *)(ptr) - offsetof(type, member))
+
+#endif /* __XLNX_TOOLS_H__ */
diff --git a/include/xlnx-video.h b/include/xlnx-video.h
new file mode 100644
index 0000000..eaebb80
--- /dev/null
+++ b/include/xlnx-video.h
@@ -0,0 +1,129 @@
+/*
+ * Xilinx Video Library
+ *
+ * Copyright (C) 2014-2016 Ideas on board Oy
+ *
+ * Contact: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
+ *
+ * This library 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 library 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 General Public License for
+ * more details.
+ */
+
+#ifndef __XLNX_VIDEO_H__
+#define __XLNX_VIDEO_H__
+
+/**
+ * \file
+ * \brief Xilinx Video Library
+ */
+
+struct xlnx_video;
+struct xlnx_video_component;
+struct xlnx_video_pipeline;
+
+struct xlnx_video *xlnx_video_create(void);
+int xlnx_video_setup(struct xlnx_video *xv);
+void xlnx_video_destroy(struct xlnx_video *xv);
+
+/**
+ * \brief Library log level
+ *
+ * Only messages with a log level lower than or equal to the library context
+ * log level are logged, all other messages are dropped silently.
+ *
+ * \sa xlnx_log_set_level()
+ */
+enum xlnx_log_level {
+ /** Don't log any message */
+ XLNX_LOG_NONE = 0,
+ /** Log error messages */
+ XLNX_LOG_ERROR = 1,
+ /** Log warning messages */
+ XLNX_LOG_WARNING = 2,
+ /** Log informational messages */
+ XLNX_LOG_INFO = 3,
+ /** Log debug messages */
+ XLNX_LOG_DEBUG = 4,
+};
+
+void xlnx_video_set_log_level(struct xlnx_video *xv, enum xlnx_log_level level);
+
+/**
+ * \brief Event handler operations
+ *
+ * The library requires a set of event handling operations whose implementation
+ * can vary between applications depending on their architecture. To avoid
+ * restricting applications to a particular programming model, those operations
+ * are not implemented by the library directly but must be provided by
+ * applications in the form of callback functions.
+ *
+ * The xlnx_video_event_operations structure contains callback function
+ * pointers for all event handling operations. Applications must supply an
+ * implementation for each operation.
+ *
+ * All event handling operations are called by the library with the handler
+ * parameter set to the event handler passed to the
+ * xlnx_video_set_event_handler() function.
+ */
+struct xlnx_video_event_operations {
+ /**
+ * \param handler event handler private data
+ * \param fd the file descriptor number
+ * \param events the types of events to watch for
+ * \param callback callback event handler
+ * \param priv private token passed to the callback event handler
+ *
+ * Start watching the file descriptor \a fd for events of type
+ * \a events, and call the \a callback function with the priv parameter
+ * set to \a priv when such an event is detected.
+ */
+ void (*watch)(void *handler, int fd, int events,
+ void(*callback)(void *priv), void *priv);
+ /**
+ * \param handler event handler private data
+ * \param fd the file descriptor number
+ *
+ * Stop watching the file descriptor \a fd for events.
+ */
+ void (*unwatch)(void *handler, int fd);
+};
+
+void xlnx_video_set_event_handler(struct xlnx_video *xv,
+ const struct xlnx_video_event_operations *ops,
+ void *handler);
+void *xlnx_video_get_event_handler_data(struct xlnx_video *xv);
+
+int xlnx_video_plugin_load_directory(struct xlnx_video *xv, const char *path);
+
+/**
+ * \brief Video component type
+ */
+enum xlnx_video_component_type {
+ /** Video capture component (input) */
+ XLNX_VIDEO_COMPONENT_CAPTURE = 1 << 0,
+ /** Video processing component (memory to memory) */
+ XLNX_VIDEO_COMPONENT_PROCESS = 1 << 1,
+ /** Video display component (output) */
+ XLNX_VIDEO_COMPONENT_DISPLAY = 1 << 2,
+ /** Any component type */
+ XLNX_VIDEO_COMPONENT_ANY = XLNX_VIDEO_COMPONENT_CAPTURE
+ | XLNX_VIDEO_COMPONENT_PROCESS
+ | XLNX_VIDEO_COMPONENT_DISPLAY,
+};
+
+int xlnx_video_component_enumerate(struct xlnx_video *xv);
+int xlnx_video_component_list(struct xlnx_video *xv,
+ enum xlnx_video_component_type type,
+ struct xlnx_video_component ***components);
+const char *xlnx_video_component_name(const struct xlnx_video_component *xvcomp);
+enum xlnx_video_component_type
+xlnx_video_component_type(const struct xlnx_video_component *xvcomp);
+
+#endif
diff --git a/lib/Makefile b/lib/Makefile
new file mode 100644
index 0000000..cb91e0e
--- /dev/null
+++ b/lib/Makefile
@@ -0,0 +1,26 @@
+AR := $(CROSS_COMPILE)ar
+CC := $(CROSS_COMPILE)gcc
+CFLAGS := -O2 -W -Wall -Wno-unused-parameter -I$(KDIR)/usr/include -I$(topdir)/3rdparty/media-ctl/include -I$(topdir)/3rdparty/media-enum/include -I$(topdir)/include -I. -fPIC
+LDFLAGS := -L$(topdir)/3rdparty/media-ctl -L$(topdir)/3rdparty/media-enum
+LIBS := -lmediaenum -lmediactl -ldl
+
+OBJECTS := xlnx-buffers.o \
+ xlnx-events.o \
+ xlnx-plugin.o \
+ xlnx-video.o
+
+TARGET := libxlnxvideo.so
+
+all: $(TARGET)
+
+$(TARGET): $(OBJECTS)
+ $(CC) -o $@ -shared $^ $(LDFLAGS) $(LIBS)
+
+%.o : %.c
+ $(CC) $(CFLAGS) -c -o $@ $<
+
+clean:
+ -$(RM) *.o
+ -$(RM) $(TARGET)
+
+install:
diff --git a/lib/xlnx-buffers.c b/lib/xlnx-buffers.c
new file mode 100644
index 0000000..34f873a
--- /dev/null
+++ b/lib/xlnx-buffers.c
@@ -0,0 +1,80 @@
+/*
+ * Xilinx Video Library - Buffers Pool
+ *
+ * Copyright (C) 2014-2016 Ideas on board Oy
+ *
+ * Contact: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
+ *
+ * This library 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 library 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 General Public License for
+ * more details.
+ */
+
+#include <stdlib.h>
+#include <string.h>
+
+#include "xlnx-buffers.h"
+
+struct xlnx_video_buffers_pool *xlnx_video_buffers_pool_new(unsigned int nbufs)
+{
+ struct xlnx_video_buffer *buffers;
+ struct xlnx_video_buffers_pool *pool;
+ unsigned int i;
+
+ pool = malloc(sizeof *pool);
+ if (pool == NULL)
+ return NULL;
+
+ buffers = malloc(sizeof *buffers * nbufs);
+ if (buffers == NULL) {
+ free(pool);
+ return NULL;
+ }
+
+ memset(buffers, 0, sizeof *buffers * nbufs);
+
+ for (i = 0; i < nbufs; ++i)
+ buffers[i].index = i;
+
+ pool->nbufs = nbufs;
+ pool->buffers = buffers;
+
+ return pool;
+}
+
+void xlnx_video_buffers_pool_delete(struct xlnx_video_buffers_pool *pool)
+{
+ unsigned int i;
+
+ for (i = 0; i < pool->nbufs; ++i) {
+ if (pool->buffers[i].allocated)
+ free(pool->buffers[i].mem);
+ }
+
+ free(pool->buffers);
+ free(pool);
+}
+
+int xlnx_video_buffers_pool_alloc(struct xlnx_video_buffers_pool *pool,
+ size_t size, size_t align)
+{
+ unsigned int i;
+ int ret;
+
+ for (i = 0; i < pool->nbufs; ++i) {
+ ret = posix_memalign(&pool->buffers[i].mem, align, size);
+ if (ret != 0)
+ return -ret;
+
+ pool->buffers[i].size = size;
+ pool->buffers[i].allocated = true;
+ }
+
+ return 0;
+}
diff --git a/lib/xlnx-buffers.h b/lib/xlnx-buffers.h
new file mode 100644
index 0000000..2170150
--- /dev/null
+++ b/lib/xlnx-buffers.h
@@ -0,0 +1,83 @@
+/*
+ * Xilinx Video Library - Buffers Pool
+ *
+ * Copyright (C) 2014-2016 Ideas on board Oy
+ *
+ * Contact: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
+ *
+ * This library 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 library 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 General Public License for
+ * more details.
+ */
+#ifndef __XLNX_VIDEO_BUFFERS_POOL_H__
+#define __XLNX_VIDEO_BUFFERS_POOL_H__
+
+#include <stdbool.h>
+#include <time.h>
+
+/*
+ * struct xlnx_video_buffer - Video buffer information
+ * @index: Zero-based buffer index, limited to the number of buffers minus one
+ * @size: Size of the video memory, in bytes
+ * @bytesused: Number of bytes used by video data, smaller or equal to @size
+ * @timestamp: Time stamp at which the buffer has been captured
+ * @error: True if an error occured while capturing video data for the buffer
+ * @allocated: True if memory for the buffer has been allocated by the pool
+ * @mem: Video data memory
+ */
+struct xlnx_video_buffer
+{
+ unsigned int index;
+ unsigned int size;
+ unsigned int bytesused;
+ struct timeval timestamp;
+ bool error;
+ bool allocated;
+ void *mem;
+};
+
+struct xlnx_video_buffers_pool
+{
+ unsigned int nbufs;
+ struct xlnx_video_buffer *buffers;
+};
+
+/*
+ * xlnx_video_buffers_pool_new - Create a new buffers pool
+ * @nbufs: Number of buffers in the pool
+ *
+ * Allocate a new buffers pool with space for @nbufs buffers. Memory for the
+ * buffers is not allocated.
+ */
+struct xlnx_video_buffers_pool *xlnx_video_buffers_pool_new(unsigned int nbufs);
+
+/*
+ * xlnx_video_buffers_pool_delete - Delete a buffers pool
+ * @pool: Buffers pool
+ *
+ * Delete a buffers pool and free buffers memory if it has been allocated by
+ * the pool.
+ */
+void xlnx_video_buffers_pool_delete(struct xlnx_video_buffers_pool *pool);
+
+/*
+ * xlnx_video_buffers_pool_alloc - Allocate memory for buffers in a pool
+ * @pool: Buffers pool
+ * @size: Buffer size
+ * @align: Buffer memory alignment in bytes
+ *
+ * Allocate @size bytes of memory for each buffer aligned to a multiple of
+ * @align bytes. The alignment must be a power of 2.
+ *
+ * Return 0 on success or a negative error code on failure.
+ */
+int xlnx_video_buffers_pool_alloc(struct xlnx_video_buffers_pool *pool,
+ size_t size, size_t align);
+
+#endif /* __XLNX_VIDEO_BUFFERS_POOL_H__ */
diff --git a/lib/xlnx-events.c b/lib/xlnx-events.c
new file mode 100644
index 0000000..933f27a
--- /dev/null
+++ b/lib/xlnx-events.c
@@ -0,0 +1,269 @@
+/*
+ * Generic Event Loop
+ *
+ * Copyright (C) 2014-2016 Ideas on board Oy
+ *
+ * Contact: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the Free
+ * Software Foundation; either version 2 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 General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#define _DEFAULT_SOURCE
+#include <errno.h>
+#include <poll.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include <sys/select.h>
+
+#include <xlnx-events.h>
+#include <xlnx-list.h>
+#include <xlnx-tools.h>
+
+#include "xlnx-priv.h"
+
+#define SELECT_TIMEOUT 2000 /* in milliseconds */
+
+struct xlnx_events {
+ struct list_entry events;
+ bool done;
+
+ int maxfd;
+ fd_set rfds;
+ fd_set wfds;
+ fd_set efds;
+};
+
+struct xlnx_event_fd {
+ struct list_entry list;
+
+ int fd;
+ int type;
+ void (*callback)(void *priv);
+ void *priv;
+};
+
+static void xlnx_events_watch_fd(void *handler, int fd, int event_type,
+ void(*callback)(void *), void *priv)
+{
+ struct xlnx_events *events = handler;
+ struct xlnx_event_fd *event;
+
+ event = malloc(sizeof *event);
+ if (event == NULL)
+ return;
+
+ event->fd = fd;
+ event->type = event_type;
+ event->callback = callback;
+ event->priv = priv;
+
+ switch (event->type) {
+ case POLLIN:
+ FD_SET(fd, &events->rfds);
+ break;
+ case POLLOUT:
+ FD_SET(fd, &events->wfds);
+ break;
+ case POLLERR:
+ FD_SET(fd, &events->efds);
+ break;
+ }
+
+ events->maxfd = max(events->maxfd, fd);
+
+ list_append(&event->list, &events->events);
+}
+
+static void xlnx_events_unwatch_fd(void *handler, int fd)
+{
+ struct xlnx_events *events = handler;
+ struct xlnx_event_fd *event = NULL;
+ struct xlnx_event_fd *entry;
+ int maxfd = 0;
+
+ list_for_each_entry(entry, &events->events, list) {
+ if (entry->fd == fd)
+ event = entry;
+ else
+ maxfd = max(maxfd, entry->fd);
+ }
+
+ if (event == NULL)
+ return;
+
+ switch (event->type) {
+ case POLLIN:
+ FD_CLR(fd, &events->rfds);
+ break;
+ case POLLOUT:
+ FD_CLR(fd, &events->wfds);
+ break;
+ case POLLERR:
+ FD_CLR(fd, &events->efds);
+ break;
+ }
+
+ events->maxfd = maxfd;
+
+ list_remove(&event->list);
+ free(event);
+}
+
+static void xlnx_events_dispatch(struct xlnx_events *events, const fd_set *rfds,
+ const fd_set *wfds, const fd_set *efds)
+{
+ struct xlnx_event_fd *event;
+ struct xlnx_event_fd *next;
+
+ list_for_each_entry_safe(event, next, &events->events, list) {
+ if (event->type == POLLIN && FD_ISSET(event->fd, rfds))
+ event->callback(event->priv);
+ else if (event->type == POLLOUT && FD_ISSET(event->fd, wfds))
+ event->callback(event->priv);
+ else if (event->type == POLLERR && FD_ISSET(event->fd, efds))
+ event->callback(event->priv);
+
+ /* If the callback stopped events processing, we're done. */
+ if (events->done)
+ break;
+ }
+}
+
+/**
+ * \brief Start and run the event loop
+ * \param xv the library context
+ *
+ * This function starts and runs the event loop synchronously, waiting for
+ * events and dispatching them as they arrive. It doesn't return until the loop
+ * is requested to stop by a call to xlnx_events_stop() or a fatal error occurs.
+ *
+ * \return false if the loop exited due to a stop request, or true if it exited
+ * due to a fatal error.
+ */
+bool xlnx_events_loop(struct xlnx_video *xv)
+{
+ struct xlnx_events *events = xlnx_video_get_event_handler_data(xv);
+
+ events->done = false;
+
+ while (!events->done) {
+ struct timeval timeout;
+ fd_set rfds;
+ fd_set wfds;
+ fd_set efds;
+ int ret;
+
+ timeout.tv_sec = SELECT_TIMEOUT / 1000;
+ timeout.tv_usec = (SELECT_TIMEOUT % 1000) * 1000;
+ rfds = events->rfds;
+ wfds = events->wfds;
+ efds = events->efds;
+
+ ret = select(events->maxfd + 1, &rfds, &wfds, &efds, &timeout);
+ if (ret < 0) {
+ /* EINTR means that a signal has been received, continue
+ * to the next iteration in that case.
+ */
+ if (errno == EINTR)
+ continue;
+
+ printf("error: select failed with %d\n", errno);
+ break;
+ }
+ if (ret == 0) {
+ /* select() should never time out as the library is
+ * supposed to process images continuously. A timeout is
+ * thus considered as a fatal error.
+ */
+ printf("error: select timeout\n");
+ break;
+ }
+
+ xlnx_events_dispatch(events, &rfds, &wfds, &efds);
+ }
+
+ return !events->done;
+}
+
+/**
+ * \brief Stop the event loop
+ * \param xv the library context
+ *
+ * Stop the running event loop started with xlnx_events_loop(). The loop is
+ * stopped asynchronously after processing the next event. This function doesn't
+ * wait for the loop to exit before returning.
+ */
+void xlnx_events_stop(struct xlnx_video *xv)
+{
+ struct xlnx_events *events = xlnx_video_get_event_handler_data(xv);
+
+ events->done = true;
+}
+
+static const struct xlnx_video_event_operations xlnx_events_ops = {
+ .watch = xlnx_events_watch_fd,
+ .unwatch = xlnx_events_unwatch_fd,
+};
+
+/**
+ * \brief Initialize event handling
+ * \param xv the library context
+ *
+ * This function registers event handling operations with the library context
+ * \a xv. The event handling implementation is based on a select() loop that is
+ * controlled through the xlnx_events_loop() and xlnx_events_stop() functions.
+ *
+ * Before destroying the library context event handling must be cleaned up with
+ * a call to xlnx_events_fini().
+ *
+ * \return 0 on success or a negative error code on failure.
+ */
+int xlnx_events_init(struct xlnx_video *xv)
+{
+ struct xlnx_events *events;
+
+ events = calloc(1, sizeof(*events));
+ if (!events)
+ return -ENOMEM;
+
+ FD_ZERO(&events->rfds);
+ FD_ZERO(&events->wfds);
+ FD_ZERO(&events->efds);
+ events->maxfd = 0;
+ list_init(&events->events);
+
+ xlnx_video_set_event_handler(xv, &xlnx_events_ops, events);
+ return 0;
+}
+
+/**
+ * \brief Clean up event handling
+ * \param xv the library context
+ *
+ * This function cleans up event handling. It must be called before destroying
+ * any library context previously initialized by a call to xlnx_events_init().
+ */
+void xlnx_events_fini(struct xlnx_video *xv)
+{
+ struct xlnx_events *events = xlnx_video_get_event_handler_data(xv);
+
+ if (events) {
+ xlnx_video_set_event_handler(xv, NULL, NULL);
+ free(events);
+ }
+}
diff --git a/lib/xlnx-plugin.c b/lib/xlnx-plugin.c
new file mode 100644
index 0000000..bd4553d
--- /dev/null
+++ b/lib/xlnx-plugin.c
@@ -0,0 +1,220 @@
+/*
+ * Xilinx Video Library - Plugin API
+ *
+ * Copyright (C) 2014-2016 Ideas on board Oy
+ *
+ * Contact: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
+ *
+ * This library 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 library 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 General Public License for
+ * more details.
+ */
+
+#include <dirent.h>
+#include <dlfcn.h>
+#include <errno.h>
+#include <string.h>
+#include <sys/types.h>
+
+#include <mediactl.h>
+
+#include <xlnx-plugin.h>
+#include <xlnx-video.h>
+
+#include "xlnx-priv.h"
+
+#define __stringify(n) #n
+#define _stringify(n) __stringify(n)
+
+#define XLNX_VIDEO_PLUGIN_DIR "/usr/lib/xilinx/video/plugins"
+#define XLNX_VIDEO_PLUGIN_SYMBOL_NAME _stringify(XLNX_VIDEO_PLUGIN_SYMBOL)
+
+struct xlnx_video_plugin {
+ struct list_entry list;
+ void *handle;
+ const struct xlnx_video_plugin_ops *ops;
+ const struct xlnx_video_plugin_info *info;
+};
+
+struct xlnx_video_component *xlnx_video_plugin_scan(struct xlnx_video *xv,
+ struct media_device *mdev)
+{
+ const struct media_device_info *mdev_info = media_get_info(mdev);
+ struct xlnx_video_component *xvcomp;
+ struct xlnx_video_plugin *plugin;
+
+ xlnx_dbg(xv, "Searching plugin for media device %s (%s)\n",
+ mdev_info->model, mdev_info->bus_info);
+
+ list_for_each_entry(plugin, &xv->plugins, list) {
+ xlnx_dbg(xv, "Trying plugin `%s'\n", plugin->info->name);
+ xvcomp = plugin->ops->scan(xv, mdev);
+ if (xvcomp) {
+ xlnx_dbg(xv, "Plugin supports media device\n");
+ return xvcomp;
+ }
+ }
+
+ xlnx_dbg(xv, "No matching plugin found\n");
+ return NULL;
+}
+
+static int xlnx_video_plugin_load_file(struct xlnx_video *xv, const char *filename)
+{
+ const struct xlnx_video_plugin_ops *plugin_ops;
+ struct xlnx_video_plugin *plugin;
+ void *plugin_so;
+ int ret;
+
+ xlnx_dbg(xv, "Loading plugin from file %s\n", filename);
+
+ plugin_so = dlopen(filename, RTLD_LAZY);
+ if (!plugin_so) {
+ xlnx_dbg(xv, "Failed to open shared library (%s)\n", dlerror());
+ return -EINVAL;
+ }
+
+ plugin_ops = dlsym(plugin_so, XLNX_VIDEO_PLUGIN_SYMBOL_NAME);
+ if (!plugin_ops) {
+ xlnx_dbg(xv, "Plugin symbol not found (%s)\n", dlerror());
+ ret = -EINVAL;
+ goto error;
+ }
+
+ plugin = calloc(1, sizeof(*plugin));
+ if (!plugin) {
+ ret = -ENOMEM;
+ goto error;
+ }
+
+ plugin->handle = plugin_so;
+ plugin->ops = plugin_ops;
+ plugin->info = plugin_ops->info();
+
+ list_append(&plugin->list, &xv->plugins);
+
+ xlnx_dbg(xv, "Plugin loaded successfully\n");
+ return 0;
+
+error:
+ dlclose(plugin_so);
+ return ret;
+}
+
+/**
+ * \brief Load plugins from a given directory
+ * \param xv the library context
+ * \param path the full path name to the directory containing plugins
+ *
+ * This function attempts to load all plugins from the \a path directory. A
+ * plugin is a shared object whose name ends with '.so' and contains a symbol
+ * named '__xlnx_video_plugin' pointing to a struct xlnx_video_plugin_ops
+ * instance.
+ *
+ * When a valid plugin is found and loaded, call the init function supplied in
+ * the plugin operations structure.
+ *
+ * Shared objects that fail to load, don't export the plugin operations
+ * structure, don't implement the init function or return an error from their
+ * init function are ignored and not considered as a fatal error.
+ *
+ * \return Return the number of plugins successfully loaded, or a negative error
+ * code if a fatal error occurs.
+ */
+int xlnx_video_plugin_load_directory(struct xlnx_video *xv, const char *path)
+{
+ struct dirent *entry;
+ unsigned int count = 0;
+ size_t pathlen;
+ DIR *dir;
+ int ret = 0;
+
+ xlnx_dbg(xv, "Loading plugins from directory %s\n", path);
+
+ dir = opendir(path);
+ if (!dir) {
+ xlnx_dbg(xv, "Failed to open directory\n");
+ return -errno;
+ }
+
+ pathlen = strlen(path);
+
+ while ((entry = readdir(dir))) {
+ char *filename;
+ size_t len;
+
+ if (entry->d_type != DT_REG && entry->d_type != DT_LNK &&
+ entry->d_type != DT_UNKNOWN)
+ continue;
+
+ len = strlen(entry->d_name);
+ if (strcmp(entry->d_name + len - 3, ".so"))
+ continue;
+
+ filename = malloc(pathlen + 1 + len + 1);
+ if (!filename)
+ break;
+
+ strcpy(filename, path);
+ filename[pathlen] = '/';
+ strcpy(filename + pathlen + 1, entry->d_name);
+
+ ret = xlnx_video_plugin_load_file(xv, filename);
+ free(filename);
+
+ if (ret < 0)
+ continue;
+
+ count++;
+ }
+
+ closedir(dir);
+
+ return ret < 0 ? ret : (int)count;
+}
+
+/** \cond INTERNAL_API */
+
+/**
+ * \brief Initialize plugin support
+ * \param xv the library context
+ *
+ * Initialize plugin support and load plugins from the system default plugin
+ * directory ('/usr/lib/xilinx/video/plugins' by default).
+ *
+ * \return 0 on success or a negative error code if an error occurs.
+ */
+int xlnx_video_plugin_init(struct xlnx_video *xv)
+{
+ xlnx_video_plugin_load_directory(xv, XLNX_VIDEO_PLUGIN_DIR);
+
+ return 0;
+}
+
+/**
+ * \brief Initialize plugin support
+ * \param xv the library context
+ *
+ * Initialize plugin support and load plugins from the system default plugin
+ * directory ('/usr/lib/xilinx/video/plugins' by default).
+ *
+ * \return 0 on success or a negative error code if an error occurs.
+ */
+void xlnx_video_plugin_fini(struct xlnx_video *xv)
+{
+ struct xlnx_video_plugin *plugin, *next;
+
+ list_for_each_entry_safe(plugin, next, &xv->plugins, list) {
+ list_remove(&plugin->list);
+ dlclose(plugin->handle);
+ free(plugin);
+ }
+}
+
+/** \endcond */
diff --git a/lib/xlnx-priv.h b/lib/xlnx-priv.h
new file mode 100644
index 0000000..ca83425
--- /dev/null
+++ b/lib/xlnx-priv.h
@@ -0,0 +1,107 @@
+/*
+ * Xilinx Video Library - Internal API
+ *
+ * Copyright (C) 2014-2016 Ideas on board Oy
+ *
+ * Contact: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
+ *
+ * This library 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 library 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 General Public License for
+ * more details.
+ */
+#ifndef __XLNX_PRIV_H__
+#define __XLNX_PRIV_H__
+/** \cond INTERNAL_API */
+
+#include <stdbool.h>
+#include <stdlib.h>
+
+#include <xlnx-list.h>
+#include <xlnx-video.h>
+
+struct media_device;
+struct media_entity;
+struct media_entity_desc;
+
+/**
+ * \brief Xilinx video entity in a component
+ */
+struct xlnx_video_entity {
+ /** Entities list */
+ struct list_entry list;
+ /** Media entity */
+ struct media_entity *entity;
+ /** Media entity information */
+ const struct media_entity_desc *info;
+ /** Indicates whether this is the last entity in the component */
+ bool last;
+};
+
+/**
+ * \brief Xilinx video component
+ */
+struct xlnx_video_component {
+ /** The library context */
+ struct xlnx_video *xv;
+ /** List entry in the context's components list */
+ struct list_entry list;
+ /** List of video entities in the component */
+ struct list_entry entities;
+
+ /** Component type */
+ enum xlnx_video_component_type type;
+ /** Component name */
+ const char *name;
+
+ /**
+ * Entity at the input of the component (NULL if the component has no
+ * input entity).
+ */
+ struct xlnx_video_entity *input;
+ /**
+ * Entity at the output of the component (NULL if the component has no
+ * output entity).
+ */
+ struct xlnx_video_entity *output;
+};
+
+/**
+ * \brief Xilinx video library context
+ */
+struct xlnx_video {
+ /** List of video components in the system */
+ struct list_entry components;
+ /** Number of components in the components list */
+ unsigned int num_components;
+
+ /** List of loaded plugins */
+ struct list_entry plugins;
+
+ /** Event handler operations */
+ const struct xlnx_video_event_operations *event_ops;
+ /** Event handler private data */
+ void *event_handler;
+
+ /** Log level for library messages */
+ enum xlnx_log_level log_level;
+};
+
+int xlnx_video_plugin_init(struct xlnx_video *xv);
+void xlnx_video_plugin_fini(struct xlnx_video *xv);
+struct xlnx_video_component *xlnx_video_plugin_scan(struct xlnx_video *xv,
+ struct media_device *mdev);
+
+void xlnx_video_log_print(struct xlnx_video *xv, unsigned int level,
+ const char *func, const char *fmt, ...);
+
+#define xlnx_dbg(xv, fmt...) \
+ xlnx_video_log_print(xv, XLNX_LOG_DEBUG, __func__, fmt)
+
+/** \endcond INTERNAL_API */
+#endif /* __XLNX_PRIV_H__ */
diff --git a/lib/xlnx-video.c b/lib/xlnx-video.c
new file mode 100644
index 0000000..61c9f7c
--- /dev/null
+++ b/lib/xlnx-video.c
@@ -0,0 +1,388 @@
+/*
+ * Xilinx Video Library
+ *
+ * Copyright (C) 2014-2016 Ideas on board Oy
+ *
+ * Contact: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
+ *
+ * This library 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 library 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 General Public License for
+ * more details.
+ */
+
+#include <errno.h>
+#include <stdarg.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+
+#include <media-enumerate.h>
+#include <mediactl.h>
+
+#include <xlnx-list.h>
+#include <xlnx-plugin.h>
+#include <xlnx-tools.h>
+#include <xlnx-video.h>
+
+#include "xlnx-priv.h"
+
+/**
+ * \mainpage
+ *
+ * The Xilinx video library offers a high-level API to enumerate video-related
+ * components in the system, assemble them in pipelines and stream video in and
+ * out of them.
+ *
+ * To use the library, an application must create a library context with a call
+ * to xlnx_video_create(). The function returns a context pointer that will be
+ * passed to all other library functions. Once a context isn't needed anymore it
+ * should be destroyed by a call to xlnx_video_destroy().
+ *
+ * Multiple contexts can be created and managed separately. However, as contexts
+ * store information about all media devices present in the system, accessing
+ * the same media devices from multiple contexts isn't supported and leads to
+ * undefined behaviour.
+ *
+ * Right after creation contexts are not ready for use. They must be initialized
+ * by registering event handling operations with xlnx_video_set_event_handler().
+ * Optionally logging can be initialized if desired with
+ * xlnx_video_set_log_level(). Finally, to complete initialization applications
+ * must call xlnx_video_setup() on the context. From that point onward the
+ * context can be used with other library functions.
+ */
+
+/* -----------------------------------------------------------------------------
+ * Components Discovery and Management
+ */
+
+/**
+ * \brief Get a list of components in the system
+ * \param xv the library context
+ * \param type the desired component type
+ * \param [out] components array of returned components
+ *
+ * Store a list of components matching the requested \a type in the
+ * \a components array.
+ *
+ * The \a type parameter is a bitmask of components type. Components matching
+ * one of the types in the bitmask will be included in the list, all other
+ * components will be ignored.
+ *
+ * The \a components parameter points to an array of components pointer.
+ * The function allocates an array of component pointers, fills it with
+ * pointers to all components matching the requested \a type, and stores it in
+ * the \a components pointer. The components array is allocated using the C
+ * memory allocator and must be freed by the caller with a call to free().
+ *
+ * The \a components array pointer can be NULL, in which case the function will
+ * not allocate any memory and will only return the number of matching
+ * components.
+ *
+ * If no component matches the requested \a type this function will not allocate
+ * any memory and will not touch the \a components parameter.
+ *
+ * Components must first be enumerated by a call to
+ * xlnx_video_component_enumerate() before calling this function.
+ *
+ * \return the total number of components matching the requested \a type found
+ * in the system and supported by the library (including the loaded plugins) on
+ * success, or a negative error code on failure.
+ */
+int xlnx_video_component_list(struct xlnx_video *xv,
+ enum xlnx_video_component_type type,
+ struct xlnx_video_component ***components)
+{
+ struct xlnx_video_component **comps;
+ struct xlnx_video_component *xvcomp;
+ unsigned int count;
+
+ if (!xv->num_components)
+ return 0;
+
+ count = 0;
+ list_for_each_entry(xvcomp, &xv->components, list) {
+ if (!(xvcomp->type & type))
+ continue;
+
+ count++;
+ }
+
+ if (!count || !components)
+ return count;
+
+ comps = calloc(count, sizeof(*comps));
+ if (comps == NULL)
+ return -ENOMEM;
+
+ count = 0;
+ list_for_each_entry(xvcomp, &xv->components, list) {
+ if (!(xvcomp->type & type))
+ continue;
+
+ comps[count++] = xvcomp;
+ }
+
+ *components = comps;
+ return count;
+}
+
+/**
+ * \brief Get the component name
+ * \param xvcomp the component
+ *
+ * \return the name of the component \a xvcomp. The name string is valid for the
+ * lifetime of the component.
+ */
+const char *xlnx_video_component_name(const struct xlnx_video_component *xvcomp)
+{
+ return xvcomp->name;
+}
+
+/**
+ * \brief Get the component type
+ * \param xvcomp the component
+ *
+ * \return the type of the component \a xvcomp.
+ */
+enum xlnx_video_component_type
+xlnx_video_component_type(const struct xlnx_video_component *xvcomp)
+{
+ return xvcomp->type;
+}
+
+/* -----------------------------------------------------------------------------
+ * Components Discovery
+ */
+
+static int xlnx_video_component_scan_media(struct xlnx_video *xv,
+ struct media_device *media)
+{
+ struct xlnx_video_component *xvcomp;
+
+ xvcomp = xlnx_video_plugin_scan(xv, media);
+ if (xvcomp) {
+ list_append(&xv->components, &xvcomp->list);
+ xv->num_components++;
+ }
+
+ return 0;
+}
+
+static int xlnx_video_component_scan(struct xlnx_video *xv)
+{
+ struct media_enumerate *media_enum;
+ struct media_device **devices;
+ unsigned int num_devices;
+ unsigned int i;
+ int ret;
+
+ /* Start by scanning media controller devices. */
+ media_enum = media_enumerate_new();
+ if (!media_enum)
+ return -ENOMEM;
+
+ ret = media_enumerate_scan(media_enum);
+ if (ret < 0)
+ goto done;
+
+ num_devices = media_enumerate_get_devices_count(media_enum);
+ if (num_devices == 0) {
+ ret = -ENXIO;
+ goto done;
+ }
+
+ devices = media_enumerate_get_devices(media_enum);
+
+ for (i = 0; i < num_devices; ++i) {
+ ret = xlnx_video_component_scan_media(xv, devices[i]);
+ if (ret < 0)
+ goto done;
+ }
+
+done:
+ media_enumerate_unref(media_enum);
+ return ret;
+}
+
+/**
+ * \brief Enumerate components in the system
+ * \param xv the library context
+ *
+ * This function enumerates all supported components in the system and cache
+ * them in the library context \a xv. It must be called once after initializing
+ * the context and before calling any other of the component-related functions.
+ *
+ * \return 0 on success or a negative error code otherwise.
+ */
+int xlnx_video_component_enumerate(struct xlnx_video *xv)
+{
+ int ret;
+
+ ret = xlnx_video_component_scan(xv);
+ if (ret < 0)
+ return ret;
+
+ return 0;
+}
+
+/* -----------------------------------------------------------------------------
+ * Initialization
+ */
+
+/**
+ * \brief Create a working context for the library
+ *
+ * The Xilinx video library uses context objects to store internal data.
+ * Applications must call this function to create and initialize a context
+ * that can then be passed to other library functions.
+ *
+ * Multiple contexts can be created and managed separately. However, as contexts
+ * store information about all media devices present in the system, accessing
+ * the same media devices from multiple contexts isn't supported and leads to
+ * undefined behaviour.
+ *
+ * When a context isn't needed anymore applications must call the
+ * xlnx_video_destroy() function to destroy of it.
+ *
+ * \return a context pointer on success or NULL if an error occurs.
+ */
+struct xlnx_video *xlnx_video_create(void)
+{
+ struct xlnx_video *xv;
+
+ xv = calloc(1, sizeof *xv);
+ if (!xv)
+ return NULL;
+
+ list_init(&xv->components);
+ list_init(&xv->plugins);
+
+ xv->log_level = XLNX_LOG_NONE;
+
+ return xv;
+}
+
+/**
+ * \brief Setup a library context to make it ready for use
+ * \param xv the library context
+ *
+ * After creating and initializing a library context \a xv, applications must
+ * call this function to finish context setup and make it ready for use.
+ *
+ * \return 0 on success or a negative error code otherwise.
+ */
+int xlnx_video_setup(struct xlnx_video *xv)
+{
+ int ret;
+
+ ret = xlnx_video_plugin_init(xv);
+ if (ret < 0)
+ return ret;
+
+ return 0;
+}
+
+/**
+ * \brief Destroy a library context
+ * \param xv the library context
+ *
+ * Applications must call this function to destroy library contexts created
+ * by xlnx_video_create() when they're not needed anymore, and at the latest
+ * when the application exits. The context pointer \a xv becomes invalid when
+ * this function is called.
+ */
+void xlnx_video_destroy(struct xlnx_video *xv)
+{
+ xlnx_video_plugin_fini(xv);
+ free(xv);
+}
+
+/**
+ * \brief Register event handler operations
+ * \param xv the library context
+ * \param ops the event handling operations
+ * \param handler the event handler private data
+ *
+ * The library requires the application to provide an implementation of a set of
+ * operations to handle event notifications on file descriptors.
+ *
+ * This function sets the event handler operations \a ops and private data
+ * pointer \a handler for the library context. It must be called after creating
+ * a context with xlnx_video_create() and before initializing it with
+ * xlnx_video_init().
+ */
+void xlnx_video_set_event_handler(struct xlnx_video *xv,
+ const struct xlnx_video_event_operations *ops,
+ void *handler)
+{
+ xv->event_ops = ops;
+ xv->event_handler = handler;
+}
+
+/**
+ * \brief Retrieve the event handler private data registered with the context
+ * \param xv the library context
+ *
+ * \return the event handler private data pointer registered with the library
+ * context by a previous call to xlnx_video_set_event_handler().
+ */
+void *xlnx_video_get_event_handler_data(struct xlnx_video *xv)
+{
+ return xv->event_handler;
+}
+
+/**
+ * \brief Log a library message
+ * \param xv the library context
+ * \param level the message log level
+ * \param fmt the message format
+ * \param ... the message arguments
+ *
+ * Log the message specified by \a format and \a ... arguments using the library
+ * logging infrastructure. The message will be logged only if its \a level is
+ * lower than or equal to the \a xv library context current log level, as set by
+ * xlnx_log_set_level(). Otherwise the message will be dropped silently.
+ */
+void xlnx_video_log_print(struct xlnx_video *xv, unsigned int level,
+ const char *func, const char *fmt, ...)
+{
+ struct timespec ts;
+ va_list ap;
+
+ if (level == XLNX_LOG_NONE || level > xv->log_level)
+ return;
+
+ clock_gettime(CLOCK_MONOTONIC, &ts);
+
+ printf("[%lu.%06lu] %s: ", ts.tv_sec, ts.tv_nsec / 1000, func);
+
+ va_start(ap, fmt);
+ vprintf(fmt, ap);
+ va_end(ap);
+}
+
+/**
+ * \brief Set the library context log level
+ * \param xv the library context
+ * \param level the desired log level
+ *
+ * The Xilinx video library can print error, informational and debug messages
+ * to help debugging applications and library internals. Only messages whose log
+ * level is lower than or equal to the library context log level are printed,
+ * other messages are dropped silently
+ *
+ * This function sets the active log level for the context \a xv to \a level.
+ * The default log level is XLNX_LOG_NONE, which drops all log messages.
+ */
+void xlnx_video_set_log_level(struct xlnx_video *xv, enum xlnx_log_level level)
+{
+ xv->log_level = level;
+}
diff --git a/plugins/Makefile b/plugins/Makefile
new file mode 100644
index 0000000..472d4d1
--- /dev/null
+++ b/plugins/Makefile
@@ -0,0 +1,12 @@
+SUBDIRS=dummy
+
+recursive=all clean install
+
+all:
+
+$(recursive):
+ @target=$@ ; \
+ for subdir in $(SUBDIRS); do \
+ echo "Making $$target in $$subdir" ; \
+ $(MAKE) -C $$subdir $$target; \
+ done
diff --git a/plugins/dummy/Makefile b/plugins/dummy/Makefile
new file mode 100644
index 0000000..0fb053b
--- /dev/null
+++ b/plugins/dummy/Makefile
@@ -0,0 +1,21 @@
+AR := $(CROSS_COMPILE)ar
+CC := $(CROSS_COMPILE)gcc
+CFLAGS := -O2 -W -Wall -Wno-unused-parameter -I$(KDIR)/usr/include -I$(topdir)/include -I. -fPIC
+LDFLAGS :=
+
+OBJECTS := xlnx-dummy.o
+TARGET := xlnx-dummy.so
+
+%.o : %.c
+ $(CC) $(CFLAGS) -c -o $@ $<
+
+all: $(TARGET)
+
+$(TARGET): $(OBJECTS)
+ $(CC) -o $@ -shared $^
+
+clean:
+ -$(RM) *.o
+ -$(RM) $(TARGET)
+
+install:
diff --git a/plugins/dummy/xlnx-dummy.c b/plugins/dummy/xlnx-dummy.c
new file mode 100644
index 0000000..a43fc25
--- /dev/null
+++ b/plugins/dummy/xlnx-dummy.c
@@ -0,0 +1,42 @@
+/*
+ * Xilinx Video Library - Dummy plugin that supports no device
+ *
+ * Copyright (C) 2016 Ideas on board Oy
+ *
+ * Contact: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
+ *
+ * This library 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 library 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 General Public License for
+ * more details.
+ */
+
+#include <stdlib.h>
+
+#include <xlnx-plugin.h>
+
+static const struct xlnx_video_plugin_info dummy_plugin_info = {
+ .name = "Dummy plugin",
+ .type = XLNX_VIDEO_PLUGIN_TYPE_SOFTWARE,
+};
+
+static const struct xlnx_video_plugin_info *dummy_info(void)
+{
+ return &dummy_plugin_info;
+}
+
+static struct xlnx_video_component *dummy_scan(struct xlnx_video *xv,
+ struct media_device *mdev)
+{
+ return NULL;
+}
+
+EXPORT_XLNX_VIDEO_PLUGIN(dummy) = {
+ .info = dummy_info,
+ .scan = dummy_scan,
+};
diff --git a/plugins/v4l2/Makefile b/plugins/v4l2/Makefile
new file mode 100644
index 0000000..fcce631
--- /dev/null
+++ b/plugins/v4l2/Makefile
@@ -0,0 +1,22 @@
+AR := $(CROSS_COMPILE)ar
+CC := $(CROSS_COMPILE)gcc
+CFLAGS := -O2 -W -Wall -Wno-unused-parameter -I$(KDIR)/usr/include -I$(topdir)/3rdparty/media-ctl/include -I$(topdir)/include -I. -fPIC
+LDFLAGS := -L$(topdir)/3rdparty/media-ctl
+LIBS := -lmediactl
+
+OBJECTS := xlnx-v4l2.o
+TARGET := xlnx-v4l2.so
+
+%.o : %.c
+ $(CC) $(CFLAGS) -c -o $@ $<
+
+all: $(TARGET)
+
+$(TARGET): $(OBJECTS)
+ $(CC) -o $@ -shared $^
+
+clean:
+ -$(RM) *.o
+ -$(RM) $(TARGET)
+
+install:
diff --git a/plugins/v4l2/v4l2.c b/plugins/v4l2/v4l2.c
new file mode 100644
index 0000000..c0fdd54
--- /dev/null
+++ b/plugins/v4l2/v4l2.c
@@ -0,0 +1,721 @@
+/*
+ * Xilinx Video Library - Generic V4L2 support
+ *
+ * Copyright (C) 2014-2016 Ideas on board Oy
+ *
+ * Contact: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
+ *
+ * This library 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 library 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 General Public License for
+ * more details.
+ */
+
+#include <stdio.h>
+#include <string.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <errno.h>
+#include <getopt.h>
+#include <sys/ioctl.h>
+#include <sys/mman.h>
+#include <sys/select.h>
+#include <sys/time.h>
+
+#include <linux/videodev2.h>
+
+#include <xlnx-buffers.h>
+#include <xlnx-list.h>
+#include <xlnx-tools.h>
+
+#include "v4l2.h"
+
+#ifndef V4L2_BUF_FLAG_ERROR
+#define V4L2_BUF_FLAG_ERROR 0x0040
+#endif
+
+struct v4l2_ival_desc {
+ struct v4l2_fract min;
+ struct v4l2_fract max;
+ struct v4l2_fract step;
+
+ struct list_entry list;
+};
+
+struct v4l2_frame_desc {
+ unsigned int min_width;
+ unsigned int min_height;
+ unsigned int max_width;
+ unsigned int max_height;
+ unsigned int step_width;
+ unsigned int step_height;
+
+ struct list_entry list;
+ struct list_entry ivals;
+};
+
+struct v4l2_format_desc {
+ unsigned int pixelformat;
+
+ struct list_entry list;
+ struct list_entry frames;
+};
+
+/* -----------------------------------------------------------------------------
+ * Formats enumeration
+ */
+
+static int
+v4l2_enum_frame_intervals(struct v4l2_device *dev, struct v4l2_format_desc *format,
+ struct v4l2_frame_desc *frame)
+{
+ struct v4l2_ival_desc *ival;
+ unsigned int i;
+ int ret;
+
+ for (i = 0; ; ++i) {
+ struct v4l2_frmivalenum ivalenum;
+
+ memset(&ivalenum, 0, sizeof ivalenum);
+ ivalenum.index = i;
+ ivalenum.pixel_format = format->pixelformat;
+ ivalenum.width = frame->min_width;
+ ivalenum.height = frame->min_height;
+ ret = ioctl(dev->fd, VIDIOC_ENUM_FRAMEINTERVALS, &ivalenum);
+ if (ret < 0)
+ break;
+
+ if (i != ivalenum.index)
+ printf("Warning: driver returned wrong ival index "
+ "%u.\n", ivalenum.index);
+ if (format->pixelformat != ivalenum.pixel_format)
+ printf("Warning: driver returned wrong ival pixel "
+ "format %08x.\n", ivalenum.pixel_format);
+ if (frame->min_width != ivalenum.width)
+ printf("Warning: driver returned wrong ival width "
+ "%u.\n", ivalenum.width);
+ if (frame->min_height != ivalenum.height)
+ printf("Warning: driver returned wrong ival height "
+ "%u.\n", ivalenum.height);
+
+ ival = malloc(sizeof *ival);
+ if (ival == NULL)
+ return -ENOMEM;
+
+ memset(ival, 0, sizeof *ival);
+
+ switch (ivalenum.type) {
+ case V4L2_FRMIVAL_TYPE_DISCRETE:
+ ival->min = ivalenum.discrete;
+ ival->max = ivalenum.discrete;
+ ival->step.numerator = 1;
+ ival->step.denominator = 1;
+ break;
+
+ case V4L2_FRMIVAL_TYPE_STEPWISE:
+ ival->min = ivalenum.stepwise.min;
+ ival->max = ivalenum.stepwise.max;
+ ival->step = ivalenum.stepwise.step;
+ break;
+
+ default:
+ printf("Error: driver returned invalid frame ival "
+ "type %u\n", ivalenum.type);
+ return -EINVAL;
+ }
+
+ list_append(&ival->list, &frame->ivals);
+ }
+
+ return 0;
+}
+
+static int
+v4l2_enum_frame_sizes(struct v4l2_device *dev, struct v4l2_format_desc *format)
+{
+ struct v4l2_frame_desc *frame;
+ unsigned int i;
+ int ret;
+
+ for (i = 0; ; ++i) {
+ struct v4l2_frmsizeenum frmenum;
+
+ memset(&frmenum, 0, sizeof frmenum);
+ frmenum.index = i;
+ frmenum.pixel_format = format->pixelformat;
+
+ ret = ioctl(dev->fd, VIDIOC_ENUM_FRAMESIZES, &frmenum);
+ if (ret < 0)
+ break;
+
+ if (i != frmenum.index)
+ printf("Warning: driver returned wrong frame index "
+ "%u.\n", frmenum.index);
+ if (format->pixelformat != frmenum.pixel_format)
+ printf("Warning: driver returned wrong frame pixel "
+ "format %08x.\n", frmenum.pixel_format);
+
+ frame = malloc(sizeof *frame);
+ if (frame == NULL)
+ return -ENOMEM;
+
+ memset(frame, 0, sizeof *frame);
+
+ list_init(&frame->ivals);
+ frame->step_width = 1;
+ frame->step_height = 1;
+
+ switch (frmenum.type) {
+ case V4L2_FRMSIZE_TYPE_DISCRETE:
+ frame->min_width = frmenum.discrete.width;
+ frame->min_height = frmenum.discrete.height;
+ frame->max_width = frmenum.discrete.width;
+ frame->max_height = frmenum.discrete.height;
+ break;
+
+ case V4L2_FRMSIZE_TYPE_STEPWISE:
+ frame->step_width = frmenum.stepwise.step_width;
+ frame->step_height = frmenum.stepwise.step_height;
+ case V4L2_FRMSIZE_TYPE_CONTINUOUS:
+ frame->min_width = frmenum.stepwise.min_width;
+ frame->min_height = frmenum.stepwise.min_height;
+ frame->max_width = frmenum.stepwise.max_width;
+ frame->max_height = frmenum.stepwise.max_height;
+ break;
+
+ default:
+ printf("Error: driver returned invalid frame size "
+ "type %u\n", frmenum.type);
+ return -EINVAL;
+ }
+
+ list_append(&frame->list, &format->frames);
+
+ ret = v4l2_enum_frame_intervals(dev, format, frame);
+ if (ret < 0)
+ return ret;
+ }
+
+ return 0;
+}
+static int v4l2_enum_formats(struct v4l2_device *dev)
+{
+ struct v4l2_format_desc *format;
+ unsigned int i;
+ int ret;
+
+ for (i = 0; ; ++i) {
+ struct v4l2_fmtdesc fmtenum;
+
+ memset(&fmtenum, 0, sizeof fmtenum);
+ fmtenum.index = i;
+ fmtenum.type = dev->type;
+
+ ret = ioctl(dev->fd, VIDIOC_ENUM_FMT, &fmtenum);
+ if (ret < 0)
+ break;
+
+ if (i != fmtenum.index)
+ printf("Warning: driver returned wrong format index "
+ "%u.\n", fmtenum.index);
+ if (dev->type != fmtenum.type)
+ printf("Warning: driver returned wrong format type "
+ "%u.\n", fmtenum.type);
+
+ format = malloc(sizeof *format);
+ if (format == NULL)
+ return -ENOMEM;
+
+ memset(format, 0, sizeof *format);
+
+ list_init(&format->frames);
+ format->pixelformat = fmtenum.pixelformat;
+
+ list_append(&format->list, &dev->formats);
+
+ ret = v4l2_enum_frame_sizes(dev, format);
+ if (ret < 0)
+ return ret;
+ }
+
+ return 0;
+}
+
+/* -----------------------------------------------------------------------------
+ * Open/close
+ */
+
+struct v4l2_device *v4l2_open(const char *devname)
+{
+ struct v4l2_device *dev;
+ struct v4l2_capability cap;
+ int ret;
+
+ dev = malloc(sizeof *dev);
+ if (dev == NULL)
+ return NULL;
+
+ memset(dev, 0, sizeof *dev);
+ dev->fd = -1;
+ dev->name = strdup(devname);
+ list_init(&dev->formats);
+
+ dev->fd = open(devname, O_RDWR | O_NONBLOCK);
+ if (dev->fd < 0) {
+ printf("Error opening device %s: %d.\n", devname, errno);
+ v4l2_close(dev);
+ return NULL;
+ }
+
+ memset(&cap, 0, sizeof cap);
+ ret = ioctl(dev->fd, VIDIOC_QUERYCAP, &cap);
+ if (ret < 0) {
+ printf("Error opening device %s: unable to query "
+ "device.\n", devname);
+ v4l2_close(dev);
+ return NULL;
+ }
+
+ if (cap.capabilities & V4L2_CAP_VIDEO_CAPTURE)
+ dev->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+ else if (cap.capabilities & V4L2_CAP_VIDEO_OUTPUT)
+ dev->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
+ else {
+ printf("Error opening device %s: neither video capture "
+ "nor video output supported.\n", devname);
+ v4l2_close(dev);
+ return NULL;
+ }
+
+ ret = v4l2_enum_formats(dev);
+ if (ret < 0) {
+ printf("Error opening device %s: unable to enumerate "
+ "formats.\n", devname);
+ v4l2_close(dev);
+ return NULL;
+ }
+
+ printf("Device %s opened: %s (%s).\n", devname, cap.card, cap.bus_info);
+
+ return dev;
+}
+
+void v4l2_close(struct v4l2_device *dev)
+{
+ struct v4l2_format_desc *format, *next_fmt;
+ struct v4l2_frame_desc *frame, *next_frm;
+ struct v4l2_ival_desc *ival, *next_ival;
+
+ if (dev == NULL)
+ return;
+
+ list_for_each_entry_safe(format, next_fmt, &dev->formats, list) {
+ list_for_each_entry_safe(frame, next_frm, &format->frames, list) {
+ list_for_each_entry_safe(ival, next_ival, &frame->ivals, list) {
+ free(ival);
+ }
+ free(frame);
+ }
+ free(format);
+ }
+
+ free(dev->name);
+ close(dev->fd);
+}
+
+/* -----------------------------------------------------------------------------
+ * Controls
+ */
+
+int v4l2_get_control(struct v4l2_device *dev, unsigned int id, int32_t *value)
+{
+ struct v4l2_control ctrl;
+ int ret;
+
+ ctrl.id = id;
+
+ ret = ioctl(dev->fd, VIDIOC_G_CTRL, &ctrl);
+ if (ret < 0) {
+ printf("%s: unable to get control (%d).\n", dev->name, errno);
+ return -errno;
+ }
+
+ *value = ctrl.value;
+ return 0;
+}
+
+int v4l2_set_control(struct v4l2_device *dev, unsigned int id, int32_t *value)
+{
+ struct v4l2_control ctrl;
+ int ret;
+
+ ctrl.id = id;
+ ctrl.value = *value;
+
+ ret = ioctl(dev->fd, VIDIOC_S_CTRL, &ctrl);
+ if (ret < 0) {
+ printf("%s: unable to set control (%d).\n", dev->name, errno);
+ return -errno;
+ }
+
+ *value = ctrl.value;
+ return 0;
+}
+
+int v4l2_get_controls(struct v4l2_device *dev, unsigned int count,
+ struct v4l2_ext_control *ctrls)
+{
+ struct v4l2_ext_controls controls;
+ int ret;
+
+ memset(&controls, 0, sizeof controls);
+ controls.count = count;
+ controls.controls = ctrls;
+
+ ret = ioctl(dev->fd, VIDIOC_G_EXT_CTRLS, &controls);
+ if (ret < 0)
+ printf("%s: unable to get multiple controls (%d).\n", dev->name,
+ errno);
+
+ return ret;
+}
+
+int v4l2_set_controls(struct v4l2_device *dev, unsigned int count,
+ struct v4l2_ext_control *ctrls)
+{
+ struct v4l2_ext_controls controls;
+ int ret;
+
+ memset(&controls, 0, sizeof controls);
+ controls.count = count;
+ controls.controls = ctrls;
+
+ ret = ioctl(dev->fd, VIDIOC_S_EXT_CTRLS, &controls);
+ if (ret < 0)
+ printf("%s: unable to set multiple controls (%d).\n", dev->name,
+ errno);
+
+ return ret;
+}
+
+/* -----------------------------------------------------------------------------
+ * Formats and frame rates
+ */
+
+int v4l2_get_crop(struct v4l2_device *dev, struct v4l2_rect *rect)
+{
+ struct v4l2_crop crop;
+ int ret;
+
+ memset(&crop, 0, sizeof crop);
+ crop.type = dev->type;
+
+ ret = ioctl(dev->fd, VIDIOC_G_CROP, &crop);
+ if (ret < 0) {
+ printf("%s: unable to get crop rectangle (%d).\n", dev->name,
+ errno);
+ return -errno;
+ }
+
+ dev->crop = crop.c;
+ *rect = crop.c;
+
+ return 0;
+}
+
+int v4l2_set_crop(struct v4l2_device *dev, struct v4l2_rect *rect)
+{
+ struct v4l2_crop crop;
+ int ret;
+
+ memset(&crop, 0, sizeof crop);
+ crop.type = dev->type;
+ crop.c = *rect;
+
+ ret = ioctl(dev->fd, VIDIOC_S_CROP, &crop);
+ if (ret < 0) {
+ printf("%s: unable to set crop rectangle (%d).\n", dev->name,
+ errno);
+ return -errno;
+ }
+
+ dev->crop = crop.c;
+ *rect = crop.c;
+
+ return 0;
+}
+
+int v4l2_get_format(struct v4l2_device *dev, struct v4l2_pix_format *format)
+{
+ struct v4l2_format fmt;
+ int ret;
+
+ memset(&fmt, 0, sizeof fmt);
+ fmt.type = dev->type;
+
+ ret = ioctl(dev->fd, VIDIOC_G_FMT, &fmt);
+ if (ret < 0) {
+ printf("%s: unable to get format (%d).\n", dev->name, errno);
+ return -errno;
+ }
+
+ dev->format = fmt.fmt.pix;
+ *format = fmt.fmt.pix;
+
+ return 0;
+}
+
+int v4l2_set_format(struct v4l2_device *dev, struct v4l2_pix_format *format)
+{
+ struct v4l2_format fmt;
+ int ret;
+
+ memset(&fmt, 0, sizeof fmt);
+ fmt.type = dev->type;
+ fmt.fmt.pix.width = format->width;
+ fmt.fmt.pix.height = format->height;
+ fmt.fmt.pix.pixelformat = format->pixelformat;
+ fmt.fmt.pix.field = V4L2_FIELD_ANY;
+
+ ret = ioctl(dev->fd, VIDIOC_S_FMT, &fmt);
+ if (ret < 0) {
+ printf("%s: unable to set format (%d).\n", dev->name, errno);
+ return -errno;
+ }
+
+ dev->format = fmt.fmt.pix;
+ *format = fmt.fmt.pix;
+
+ return 0;
+}
+
+/* -----------------------------------------------------------------------------
+ * Buffers management
+ */
+
+int v4l2_alloc_buffers(struct v4l2_device *dev,
+ struct xlnx_video_buffers_pool *pool,
+ enum v4l2_memory memtype)
+{
+ struct v4l2_requestbuffers rb;
+ struct v4l2_buffer buf;
+ unsigned int i;
+ int ret;
+
+ dev->memtype = memtype;
+ dev->pool = pool;
+
+ memset(&rb, 0, sizeof rb);
+ rb.count = pool->nbufs;
+ rb.type = dev->type;
+ rb.memory = memtype;
+
+ ret = ioctl(dev->fd, VIDIOC_REQBUFS, &rb);
+ if (ret < 0) {
+ printf("%s: unable to request buffers (%d).\n", dev->name,
+ errno);
+ ret = -errno;
+ goto done;
+ }
+
+ if (rb.count > pool->nbufs) {
+ printf("%s: driver needs more buffers (%u) than available (%u).\n",
+ dev->name, rb.count, pool->nbufs);
+ ret = -E2BIG;
+ goto done;
+ }
+
+ dev->nbufs = rb.count;
+
+ printf("%s: %u buffers requested.\n", dev->name, rb.count);
+
+ /* Map the buffers. */
+ for (i = 0; i < rb.count; ++i) {
+ memset(&buf, 0, sizeof buf);
+ buf.index = i;
+ buf.type = dev->type;
+ buf.memory = memtype;
+ ret = ioctl(dev->fd, VIDIOC_QUERYBUF, &buf);
+ if (ret < 0) {
+ printf("%s: unable to query buffer %u (%d).\n",
+ dev->name, i, errno);
+ ret = -errno;
+ goto done;
+ }
+
+ switch (memtype) {
+ case V4L2_MEMORY_MMAP:
+ pool->buffers[i].mem = mmap(0, buf.length, PROT_READ | PROT_WRITE,
+ MAP_SHARED, dev->fd, buf.m.offset);
+ if (pool->buffers[i].mem == MAP_FAILED) {
+ printf("%s: unable to map buffer %u (%d)\n",
+ dev->name, i, errno);
+ ret = -errno;
+ goto done;
+ }
+ pool->buffers[i].size = buf.length;
+ printf("%s: buffer %u mapped at address %p.\n",
+ dev->name, i, pool->buffers[i].mem);
+ break;
+
+ case V4L2_MEMORY_USERPTR:
+ if (pool->buffers[i].size < buf.length) {
+ printf("%s: buffer %u too small (%u bytes required, "
+ "%u bytes available.\n", dev->name, i,
+ buf.length, pool->buffers[i].size);
+ ret = -EINVAL;
+ goto done;
+ }
+
+ printf("%s: buffer %u valid.\n", dev->name, i);
+ break;
+
+ default:
+ break;
+ }
+ }
+
+ ret = 0;
+
+done:
+ if (ret < 0)
+ v4l2_free_buffers(dev);
+
+ return ret;
+}
+
+int v4l2_free_buffers(struct v4l2_device *dev)
+{
+ struct v4l2_requestbuffers rb;
+ unsigned int i;
+ int ret;
+
+ if (dev->pool == NULL)
+ return 0;
+
+ if (dev->memtype == V4L2_MEMORY_MMAP) {
+ for (i = 0; i < dev->nbufs; ++i) {
+ struct xlnx_video_buffer *buffer = &dev->pool->buffers[i];
+
+ if (buffer->mem == NULL)
+ continue;
+
+ ret = munmap(buffer->mem, buffer->size);
+ if (ret < 0) {
+ printf("%s: unable to unmap buffer %u (%d)\n",
+ dev->name, i, errno);
+ return -errno;
+ }
+
+ buffer->mem = NULL;
+ buffer->size = 0;
+ }
+ }
+
+ memset(&rb, 0, sizeof rb);
+ rb.count = 0;
+ rb.type = dev->type;
+ rb.memory = dev->memtype;
+
+ ret = ioctl(dev->fd, VIDIOC_REQBUFS, &rb);
+ if (ret < 0) {
+ printf("%s: unable to release buffers (%d)\n", dev->name,
+ errno);
+ return -errno;
+ }
+
+ dev->nbufs = 0;
+ dev->pool = NULL;
+
+ return 0;
+}
+
+int v4l2_dequeue_buffer(struct v4l2_device *dev, struct xlnx_video_buffer *buffer)
+{
+ struct v4l2_buffer buf;
+ int ret;
+
+ memset(&buf, 0, sizeof buf);
+ buf.type = dev->type;
+ buf.memory = dev->memtype;
+
+ ret = ioctl(dev->fd, VIDIOC_DQBUF, &buf);
+ if (ret < 0) {
+ printf("%s: unable to dequeue buffer index %u/%u (%d)\n",
+ dev->name, buf.index, dev->nbufs, errno);
+ return -errno;
+ }
+
+ *buffer = dev->pool->buffers[buf.index];
+ buffer->bytesused = buf.bytesused;
+ buffer->timestamp = buf.timestamp;
+ buffer->error = !!(buf.flags & V4L2_BUF_FLAG_ERROR);
+
+ return 0;
+}
+
+int v4l2_queue_buffer(struct v4l2_device *dev, struct xlnx_video_buffer *buffer)
+{
+ struct v4l2_buffer buf;
+ int ret;
+
+ if (buffer->index >= dev->nbufs)
+ return -EINVAL;
+
+ memset(&buf, 0, sizeof buf);
+ buf.index = buffer->index;
+ buf.type = dev->type;
+ buf.memory = dev->memtype;
+
+ if (dev->memtype == V4L2_MEMORY_USERPTR)
+ buf.m.userptr = (unsigned long)dev->pool->buffers[buffer->index].mem;
+
+ buf.length = dev->pool->buffers[buffer->index].size;
+
+ if (dev->type == V4L2_BUF_TYPE_VIDEO_OUTPUT)
+ buf.bytesused = buffer->bytesused;
+
+ ret = ioctl(dev->fd, VIDIOC_QBUF, &buf);
+ if (ret < 0) {
+ printf("%s: unable to queue buffer index %u/%u (%d)\n",
+ dev->name, buf.index, dev->nbufs, errno);
+ return -errno;
+ }
+
+ return 0;
+}
+
+/* -----------------------------------------------------------------------------
+ * Stream management
+ */
+
+int v4l2_stream_on(struct v4l2_device *dev)
+{
+ int type = dev->type;
+ int ret;
+
+ ret = ioctl(dev->fd, VIDIOC_STREAMON, &type);
+ if (ret < 0)
+ return -errno;
+
+ return 0;
+}
+
+int v4l2_stream_off(struct v4l2_device *dev)
+{
+ int type = dev->type;
+ int ret;
+
+ ret = ioctl(dev->fd, VIDIOC_STREAMOFF, &type);
+ if (ret < 0)
+ return -errno;
+
+ return 0;
+}
diff --git a/plugins/v4l2/v4l2.h b/plugins/v4l2/v4l2.h
new file mode 100644
index 0000000..c2b683a
--- /dev/null
+++ b/plugins/v4l2/v4l2.h
@@ -0,0 +1,289 @@
+/*
+ * Xilinx Video Library - Generic V4L2 support
+ *
+ * Copyright (C) 2014-2016 Ideas on board Oy
+ *
+ * Contact: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
+ *
+ * This library 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 library 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 General Public License for
+ * more details.
+ */
+#ifndef __V4L2_H
+#define __V4L2_H
+
+#include <linux/videodev2.h>
+#include <stdbool.h>
+#include <stdint.h>
+
+#include <xlnx-list.h>
+
+struct xlnx_video_buffers_pool;
+struct xlnx_video_buffer;
+
+struct v4l2_device
+{
+ int fd;
+ char *name;
+
+ enum v4l2_buf_type type;
+ enum v4l2_memory memtype;
+
+ struct list_entry formats;
+ struct v4l2_pix_format format;
+ struct v4l2_rect crop;
+
+ unsigned int nbufs;
+ struct xlnx_video_buffers_pool *pool;
+};
+
+/*
+ * v4l2_open - Open a V4L2 device
+ * @devname: Name (including path) of the device node
+ *
+ * Open the V4L2 device referenced by @devname for video capture or display in
+ * non-blocking mode.
+ *
+ * If the device can be opened, query its capabilities and enumerates frame
+ * formats, sizes and intervals.
+ *
+ * Return a pointer to a newly allocated v4l2_device structure instance on
+ * success and NULL on failure. The returned pointer must be freed with
+ * v4l2_close when the device isn't needed anymore.
+ */
+struct v4l2_device *v4l2_open(const char *devname);
+
+/*
+ * v4l2_close - Close a V4L2 device
+ * @dev: Device instance
+ *
+ * Close the device instance given as argument and free allocated resources.
+ * Access to the device instance is forbidden after this function returns.
+ */
+void v4l2_close(struct v4l2_device *dev);
+
+/*
+ * v4l2_get_format - Retrieve the current pixel format
+ * @dev: Device instance
+ * @format: Pixel format structure to be filled
+ *
+ * Query the device to retrieve the current pixel format and frame size and fill
+ * the @format structure.
+ *
+ * Return 0 on success or a negative error code on failure.
+ */
+int v4l2_get_format(struct v4l2_device *dev, struct v4l2_pix_format *format);
+
+/*
+ * v4l2_set_format - Set the pixel format
+ * @dev: Device instance
+ * @format: Pixel format structure to be set
+ *
+ * Set the pixel format and frame size stored in @format. The device can modify
+ * the requested format and size, in which case the @format structure will be
+ * updated to reflect the modified settings.
+ *
+ * Return 0 on success or a negative error code on failure.
+ */
+int v4l2_set_format(struct v4l2_device *dev, struct v4l2_pix_format *format);
+
+/*
+ * v4l2_get_crop - Retrieve the current crop rectangle
+ * @dev: Device instance
+ * @rect: Crop rectangle structure to be filled
+ *
+ * Query the device to retrieve the current crop rectangle and fill the @rect
+ * structure.
+ *
+ * Return 0 on success or a negative error code on failure.
+ */
+int v4l2_get_crop(struct v4l2_device *dev, struct v4l2_rect *rect);
+
+/*
+ * v4l2_set_crop - Set the crop rectangle
+ * @dev: Device instance
+ * @rect: Crop rectangle structure to be set
+ *
+ * Set the crop rectangle stored in @rect. The device can modify the requested
+ * rectangle, in which case the @rect structure will be updated to reflect the
+ * modified settings.
+ *
+ * Return 0 on success or a negative error code on failure.
+ */
+int v4l2_set_crop(struct v4l2_device *dev, struct v4l2_rect *rect);
+
+/*
+ * v4l2_alloc_buffers - Allocate buffers for video frames
+ * @dev: Device instance
+ * @pool: Buffers pool
+ * @memtype: Type of buffers
+ *
+ * Request the driver to allocate the number of buffers in the pool. The driver
+ * can modify the number of buffers depending on its needs. The number of
+ * allocated buffers will be stored in the @dev::nbufs field.
+ *
+ * When @memtype is set to V4L2_MEMORY_MMAP the buffers are allocated by the
+ * driver and mapped to userspace. When @memtype is set to V4L2_MEMORY_USERPTR
+ * the driver only allocates buffer objects and relies on the application to
+ * provide memory storage for video frames.
+ *
+ * Upon successful allocation the @dev::pool field points to the buffers pool.
+ *
+ * Return 0 on success or a negative error code on failure.
+ */
+int v4l2_alloc_buffers(struct v4l2_device *dev,
+ struct xlnx_video_buffers_pool *pool,
+ enum v4l2_memory memtype);
+
+/*
+ * v4l2_free_buffers - Free buffers
+ * @dev: Device instance
+ *
+ * Free buffers previously allocated by v4l2_alloc_buffers(). If the buffers
+ * have been allocated with the V4L2_MEMORY_USERPTR memory type only the buffer
+ * objects are freed, and the caller is responsible for freeing the video frames
+ * memory if required.
+ *
+ * When successful this function sets the @dev::nbufs field to zero and the
+ * @dev::pool field to NULL.
+ *
+ * Return 0 on success or a negative error code on failure.
+ */
+int v4l2_free_buffers(struct v4l2_device *dev);
+
+/*
+ * v4l2_queue_buffer - Queue a buffer for video capture/output
+ * @dev: Device instance
+ * @buffer: Buffer to be queued
+ *
+ * Queue the buffer identified by @buffer for video capture or output, depending
+ * on the device type.
+ *
+ * The caller must initialize the @buffer::index field with the index of the
+ * buffer to be queued. The index is zero-based and must be lower than the
+ * number of allocated buffers.
+ *
+ * For V4L2_MEMORY_USERPTR buffers, the caller must initialize the @buffer::mem
+ * field with the address of the video frame memory, and the @buffer:length
+ * field with its size in bytes. For optimal performances the address and length
+ * should be identical between v4l2_queue_buffer() calls for a given buffer
+ * index.
+ *
+ * For video output, the caller must initialize the @buffer::bytesused field
+ * with the size of video data. The value should differ from the buffer length
+ * for variable-size video formats only.
+ *
+ * Upon successful return the buffer ownership is transferred to the driver. The
+ * caller must not touch video memory for that buffer before calling
+ * v4l2_dequeue_buffer(). Attempting to queue an already queued buffer will
+ * fail.
+ *
+ * Return 0 on success or a negative error code on failure.
+ */
+int v4l2_queue_buffer(struct v4l2_device *dev, struct xlnx_video_buffer *buffer);
+
+/*
+ * v4l2_dequeue_buffer - Dequeue the next buffer
+ * @dev: Device instance
+ * @buffer: Dequeued buffer data to be filled
+ *
+ * Dequeue the next buffer processed by the driver and fill all fields in
+ * @buffer.
+ *
+ * This function does not block. If no buffer is ready it will return
+ * immediately with -EAGAIN.
+ *
+ * If an error occured during video capture or display, the @buffer::error field
+ * is set to true. Depending on the device the video data can be partly
+ * corrupted or complete garbage.
+ *
+ * Once dequeued the buffer ownership is transferred to the caller. Video memory
+ * for that buffer can be safely read from and written to.
+ *
+ * Return 0 on success or a negative error code on failure. An error that
+ * results in @buffer:error being set is not considered as a failure condition
+ * for the purpose of the return value.
+ */
+int v4l2_dequeue_buffer(struct v4l2_device *dev, struct xlnx_video_buffer *buffer);
+
+/*
+ * v4l2_stream_on - Start video streaming
+ * @dev: Device instance
+ *
+ * Start video capture or output on the device. For video output devices at
+ * least one buffer must be queued before starting the stream.
+ *
+ * Return 0 on success or a negative error code on failure.
+ */
+int v4l2_stream_on(struct v4l2_device *dev);
+
+/*
+ * v4l2_stream_off - Stop video streaming
+ * @dev: Device instance
+ *
+ * Stop video capture or output on the device. Upon successful return ownership
+ * of all buffers is returned to the caller.
+ *
+ * Return 0 on success or a negative error code on failure.
+ */
+int v4l2_stream_off(struct v4l2_device *dev);
+
+/*
+ * v4l2_get_control - Read the value of a control
+ * @dev: Device instance
+ * @id: Control ID
+ * @value: Control value to be filled
+ *
+ * Retrieve the current value of control @id and store it in @value.
+ *
+ * Return 0 on success or a negative error code on failure.
+ */
+int v4l2_get_control(struct v4l2_device *dev, unsigned int id, int32_t *value);
+
+/*
+ * v4l2_set_control - Write the value of a control
+ * @dev: Device instance
+ * @id: Control ID
+ * @value: Control value
+ *
+ * Set control @id to @value. The device is allowed to modify the requested
+ * value, in which case @value is updated to the modified value.
+ *
+ * Return 0 on success or a negative error code on failure.
+ */
+int v4l2_set_control(struct v4l2_device *dev, unsigned int id, int32_t *value);
+
+/*
+ * v4l2_get_controls - Read the value of multiple controls
+ * @dev: Device instance
+ * @count: Number of controls
+ * @ctrls: Controls to be read
+ *
+ * Retrieve the current value of controls identified by @ctrls.
+ *
+ * Return 0 on success or a negative error code on failure.
+ */
+int v4l2_get_controls(struct v4l2_device *dev, unsigned int count,
+ struct v4l2_ext_control *ctrls);
+
+/*
+ * v4l2_set_controls - Write the value of multiple controls
+ * @dev: Device instance
+ * @count: Number of controls
+ * @ctrls: Controls to be written
+ *
+ * Set controls identified by @ctrls. The device is allowed to modify the
+ * requested values, in which case @ctrls is updated to the modified value.
+ *
+ * Return 0 on success or a negative error code on failure.
+ */
+int v4l2_set_controls(struct v4l2_device *dev, unsigned int count,
+ struct v4l2_ext_control *ctrls);
+
+#endif
diff --git a/plugins/v4l2/xlnx-v4l2.c b/plugins/v4l2/xlnx-v4l2.c
new file mode 100644
index 0000000..c307041
--- /dev/null
+++ b/plugins/v4l2/xlnx-v4l2.c
@@ -0,0 +1,417 @@
+/*
+ * Xilinx Video Library - V4L2 plugin
+ *
+ * Copyright (C) 2014-2016 Ideas on board Oy
+ *
+ * Contact: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
+ *
+ * This library 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 library 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 General Public License for
+ * more details.
+ */
+
+#if 0
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include <v4l2.h>
+#include <v4l2subdev.h>
+
+#include <xlnx-list.h>
+#include <xlnx-tools.h>
+#include <xlnx-video.h>
+
+/*static inline struct xlnx_video_node *
+to_xlnx_video_node(struct xlnx_video_entity *e) {
+ return container_of(e, struct xlnx_video_node, entity);
+}*/
+
+/* -----------------------------------------------------------------------------
+ * Helper functions
+ */
+
+/*
+ * struct xlnx_video_format_info - Media bus format information
+ * @code: V4L2 media bus format code
+ * @pixelformat: V4L2 pixel format FCC identifier
+ */
+struct xlnx_video_format_info {
+ enum v4l2_mbus_pixelcode code;
+ __u32 pixelformat;
+};
+
+static const struct xlnx_video_format_info formats[] = {
+ { MEDIA_BUS_FMT_RGB888_1X32_PADHI, V4L2_PIX_FMT_BGR32, },
+ { MEDIA_BUS_FMT_UYVY8_1X16, V4L2_PIX_FMT_YUYV, },
+ { MEDIA_BUS_FMT_VUY8_1X24, V4L2_PIX_FMT_YUV444, },
+ { MEDIA_BUS_FMT_SRGGB8_1X8, V4L2_PIX_FMT_SGRBG8, },
+ { MEDIA_BUS_FMT_SGRBG8_1X8, V4L2_PIX_FMT_SGRBG8, },
+ { MEDIA_BUS_FMT_SGBRG8_1X8, V4L2_PIX_FMT_SGBRG8, },
+ { MEDIA_BUS_FMT_SBGGR8_1X8, V4L2_PIX_FMT_SBGGR8, },
+};
+
+static __u32 mbus_to_pix(enum v4l2_mbus_pixelcode code)
+{
+ unsigned int i;
+
+ for (i = 0; i < ARRAY_SIZE(formats); ++i) {
+ if (formats[i].code == code)
+ return formats[i].pixelformat;
+ }
+
+ return 0;
+}
+
+static enum v4l2_mbus_pixelcode pix_to_mbus(__u32 pixelformat)
+{
+ unsigned int i;
+
+ for (i = 0; i < ARRAY_SIZE(formats); ++i) {
+ if (formats[i].pixelformat == pixelformat)
+ return formats[i].code;
+ }
+
+ return 0;
+}
+
+/* -----------------------------------------------------------------------------
+ * Video streaming
+ */
+
+int xlnx_video_component_set_format(struct xlnx_video_component *xvcomp,
+ struct v4l2_mbus_framefmt *fmt)
+{
+ struct v4l2_mbus_framefmt format;
+ struct v4l2_pix_format v4l2_fmt;
+ struct xlnx_video_entity *source = NULL;
+ struct xlnx_video_entity *sink;
+ struct xlnx_video_node *video;
+ struct media_entity_pad *pad;
+ int ret;
+
+ /* Configure formats. Start from the input and propagate the format
+ * through the component.
+ */
+ format = *initial_fmt;
+
+ list_for_each_entry(sink, &xvcomp->entities, list) {
+ if (source == NULL) {
+ /* Configure the first entity in the component with the
+ * initial format.
+ */
+ pad = sink->source.link->source;
+
+ if ((sink->info->type & MEDIA_ENT_TYPE_MASK) == MEDIA_ENT_T_V4L2_SUBDEV) {
+ ret = v4l2_subdev_set_format(sink->entity, &format, 0,
+ V4L2_SUBDEV_FORMAT_ACTIVE);
+ if (ret < 0) {
+ printf("error: set format on component input failed.\n");
+ return ret;
+ }
+ } else if (sink->info->type == MEDIA_ENT_T_DEVNODE_V4L) {
+ video = to_xlnx_video_node(sink);
+
+ memset(&v4l2_fmt, 0, sizeof v4l2_fmt);
+ v4l2_fmt.pixelformat = mbus_to_pix(format.code);
+ v4l2_fmt.width = format.width;
+ v4l2_fmt.height = format.height;
+
+ ret = v4l2_set_format(video->video, &v4l2_fmt);
+ if (ret < 0) {
+ printf("error: set format failed on %s.\n",
+ sink->info->name);
+ return ret;
+ }
+
+ format.code = pix_to_mbus(v4l2_fmt.pixelformat);
+ format.width = v4l2_fmt.width;
+ format.height = v4l2_fmt.height;
+
+ video->format = format;
+ }
+
+ source = sink;
+ continue;
+ }
+
+ if ((source->info->type & MEDIA_ENT_TYPE_MASK) == MEDIA_ENT_T_V4L2_SUBDEV) {
+ pad = source->source.link->source;
+
+ /* Try to force the output format code onto the source pad. */
+ ret = v4l2_subdev_get_format(pad->entity, &format, pad->index,
+ V4L2_SUBDEV_FORMAT_ACTIVE);
+ if (ret < 0) {
+ printf("error: set format failed on %s:%u.\n",
+ pad->entity->info->name, pad->index);
+ return ret;
+ }
+
+ if (sink->last)
+ format = *fmt;
+ else
+ format.code = fmt->code;
+
+ ret = v4l2_subdev_set_format(pad->entity, &format, pad->index,
+ V4L2_SUBDEV_FORMAT_ACTIVE);
+ if (ret < 0) {
+ printf("error: set format failed on %s:%u.\n",
+ pad->entity->info.name, pad->index);
+ return ret;
+ }
+
+ if (sink->last)
+ *fmt = format;
+ }
+
+ source->source.format = format;
+
+ if ((sink->info->type & MEDIA_ENT_TYPE_MASK) == MEDIA_ENT_T_V4L2_SUBDEV) {
+ /* Propagate the format to the link target. */
+ pad = sink->sink.link->sink;
+
+ ret = v4l2_subdev_set_format(pad->entity, &format, pad->index,
+ V4L2_SUBDEV_FORMAT_ACTIVE);
+ if (ret < 0) {
+ printf("error: set format failed on %s:%u.\n",
+ pad->entity->info.name, pad->index);
+ return ret;
+ }
+ } else if (sink->info->type == MEDIA_ENT_T_DEVNODE_V4L) {
+ video = to_xlnx_video_node(sink);
+
+ /* Set the capture format on the capture or output video
+ * node. If the connected source is a pool, v4l2_fmt
+ * already contains the format that has been setup on
+ * the associated capture video node.
+ */
+ memset(&v4l2_fmt, 0, sizeof v4l2_fmt);
+ v4l2_fmt.pixelformat = mbus_to_pix(format.code);
+ v4l2_fmt.width = format.width;
+ v4l2_fmt.height = format.height;
+
+ ret = v4l2_set_format(video->video, &v4l2_fmt);
+ if (ret < 0) {
+ printf("error: set format failed on %s.\n",
+ sink->info->name);
+ return ret;
+ }
+
+ format.code = pix_to_mbus(v4l2_fmt.pixelformat);
+ format.width = v4l2_fmt.width;
+ format.height = v4l2_fmt.height;
+
+ video->format = format;
+ }
+
+ sink->sink.format = format;
+
+ source = sink;
+ }
+
+ return 0;
+}
+
+static int xlnx_video_validate_entity(struct media_entity *entity,
+ const struct media_link **linkp)
+{
+ const struct media_link *link_source = NULL;
+ const struct media_link *link_sink = NULL;
+ const struct media_entity_desc *info;
+ unsigned int num_links;
+ unsigned int i;
+
+ info = media_entity_get_info(entity);
+
+ if (info->type == MEDIA_ENT_T_DEVNODE_V4L) {
+ const struct media_link *link;
+
+ /* Video nodes must have a single pad and a single link. */
+ if (info->pads != 1)
+ return -EINVAL;
+
+ if (media_entity_get_links_count(entity) != 1)
+ return -EINVAL;
+
+ link = media_entity_get_link(entity, 0);
+ *linkp = link->sink->entity == entity ? link : NULL;
+ return 0;
+ }
+
+ if ((info->type & MEDIA_ENT_TYPE_MASK) != MEDIA_ENT_T_V4L2_SUBDEV)
+ return -EINVAL;
+
+ /*
+ * Only components with linear internal pipelines are supported, the
+ * entity must have a single connected source and a single connected
+ * sink.
+ */
+ num_links = media_entity_get_links_count(entity);
+
+ for (i = 0; i < num_links; ++i) {
+ const struct media_link *link = media_entity_get_link(entity, i);
+
+ /*
+ * Components with configurable internal pipelines are not
+ * supported.
+ */
+ if (!(link->flags & MEDIA_LNK_FL_IMMUTABLE))
+ return -EINVAL;
+
+ if (!(link->flags & MEDIA_LNK_FL_ENABLED))
+ continue;
+
+ if (link->source->entity == entity) {
+ if (link_source && link_source != link)
+ return -EINVAL;
+ link_source = link;
+ } else {
+ if (link_sink && link_sink != link)
+ return -EINVAL;
+ link_sink = link;
+ }
+ }
+
+ *linkp = link_sink;
+ return 0;
+}
+
+static int xlnx_video_scan_component(struct xlnx_video_component *xvcomp)
+{
+ struct media_entity *entity;
+
+ entity = xvcomp->output->entity;
+
+ while (1) {
+ const struct media_link *link;
+ int ret;
+
+ ret = xlnx_video_validate_entity(entity, &link);
+ if (ret < 0)
+ return ret;
+
+ if (link == NULL) {
+ const struct media_entity_desc *info;
+
+ info = media_entity_get_info(entity);
+ if (info->type == MEDIA_ENT_T_DEVNODE_V4L)
+ xvcomp->input.entity = entity;
+ break;
+ }
+
+ entity = link->source->entity;
+ }
+
+ return 0;
+}
+
+static int xlnx_video_scan_media(struct xlnx_video *xv, struct media_device *media)
+{
+}
+#endif
+
+#include <errno.h>
+#include <stdlib.h>
+
+#include <linux/media-bus-format.h>
+#include <linux/videodev2.h>
+#include <linux/v4l2-subdev.h>
+
+#include <mediactl.h>
+
+#include <xlnx-plugin.h>
+
+static const struct xlnx_video_plugin_info v4l2_plugin_info = {
+ .name = "V4L2 plugin",
+ .type = XLNX_VIDEO_PLUGIN_TYPE_HARDWARE,
+};
+
+static const struct xlnx_video_plugin_info *v4l2_info(void)
+{
+ return &v4l2_plugin_info;
+}
+
+/*
+ * \brief Xilinx V4L2 video node
+ */
+struct v4l2_video_node {
+ /* V4L2 device */
+ struct v4l2_device *video;
+#if 0
+ /* Current video format */
+ struct v4l2_mbus_framefmt format;
+ struct xlnx_video_buffers_pool *pool;
+ /* Number of buffers queued to the driver */
+ unsigned int queued;
+ /* Whether video capture is running on the device */
+ bool running;
+#endif
+};
+
+struct v4l2_component {
+ struct xlnx_video_component *xvcomp;
+
+ struct v4l2_video_node *input;
+ struct v4l2_video_node *output;
+};
+
+static struct xlnx_video_component *v4l2_scan(struct xlnx_video *xv,
+ struct media_device *mdev)
+{
+ struct media_entity *entity;
+ unsigned int num_entities;
+ unsigned int i;
+
+ num_entities = media_get_entities_count(mdev);
+ if (num_entities == 0)
+ return 0;
+
+ for (i = 0; i < num_entities; ++i) {
+ const struct media_entity_desc *info;
+ const struct media_pad *pad;
+ struct v4l2_component *xvcomp;
+ int ret;
+
+ entity = media_get_entity(mdev, i);
+ info = media_entity_get_info(entity);
+
+ if (info->type != MEDIA_ENT_T_DEVNODE_V4L ||
+ info->pads != 1)
+ continue;
+
+ pad = media_entity_get_pad(entity, 0);
+ if (!(pad->flags & MEDIA_PAD_FL_SINK))
+ continue;
+
+ xvcomp = calloc(1, sizeof *xvcomp);
+ if (!xvcomp)
+ return -ENOMEM;
+
+ list_init(&xvcomp->entities);
+ xvcomp->xv = xv;
+ xvcomp->output.entity = entity;
+
+ ret = xlnx_video_scan_component(xvcomp);
+ if (ret < 0) {
+ free(xvcomp);
+ return ret;
+ }
+
+ list_append(&xv->components, &xvcomp->list);
+ xv->num_components++;
+ }
+
+ return 0;
+}
+
+EXPORT_XLNX_VIDEO_PLUGIN(v4l2) = {
+ .info = v4l2_info,
+ .scan = v4l2_scan,
+};
diff --git a/src/Makefile b/src/Makefile
new file mode 100644
index 0000000..1bea07c
--- /dev/null
+++ b/src/Makefile
@@ -0,0 +1,22 @@
+CC := $(CROSS_COMPILE)gcc
+CFLAGS := -O2 -W -Wall -Wno-unused-parameter -I$(KDIR)/usr/include -I$(topdir)/include -I. -fPIC
+LDFLAGS := -L$(topdir)/lib
+LIBS := -lxlnxvideo
+
+OBJECTS := main.o
+
+TARGET := xlnx-video
+
+all: $(TARGET)
+
+$(TARGET): $(OBJECTS)
+ $(CC) -o $@ $^ $(LDFLAGS) $(LIBS)
+
+%.o : %.c
+ $(CC) $(CFLAGS) -c -o $@ $<
+
+clean:
+ -$(RM) *.o
+ -$(RM) $(TARGET)
+
+install:
diff --git a/src/main.c b/src/main.c
new file mode 100644
index 0000000..133c178
--- /dev/null
+++ b/src/main.c
@@ -0,0 +1,213 @@
+/*
+ * Xilinx Video Library - Command line sample application
+ *
+ * Copyright (C) 2016 Ideas on board Oy
+ *
+ * Contact: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ *
+ * 3. The name of the author may not be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY [LICENSOR] "AS IS" AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
+ * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
+ * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
+ * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+ * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <getopt.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#include <xlnx-events.h>
+#include <xlnx-tools.h>
+#include <xlnx-video.h>
+
+static const char *component_type_name(enum xlnx_video_component_type type)
+{
+ static const struct {
+ enum xlnx_video_component_type type;
+ const char *name;
+ } types[] = {
+ { XLNX_VIDEO_COMPONENT_CAPTURE, "capture" },
+ { XLNX_VIDEO_COMPONENT_PROCESS, "process" },
+ { XLNX_VIDEO_COMPONENT_DISPLAY, "display" },
+ };
+ unsigned int i;
+
+ for (i = 0; i < ARRAY_SIZE(types); ++i) {
+ if (types[i].type == type)
+ return types[i].name;
+ }
+
+ return "unknown";
+}
+
+static void list_components(struct xlnx_video *xv)
+{
+ struct xlnx_video_component **components;
+ int num_components;
+ int i;
+
+ num_components = xlnx_video_component_list(xv, XLNX_VIDEO_COMPONENT_ANY,
+ &components);
+ if (num_components < 0) {
+ printf("Failed to list components\n");
+ return;
+ } else if (!num_components) {
+ printf("No components found.\n");
+ return;
+ }
+
+ printf("%u component%s found\n", num_components,
+ num_components > 1 ? "s" : "");
+
+ for (i = 0; i < num_components; ++i) {
+ const struct xlnx_video_component *component = components[i];
+ enum xlnx_video_component_type type;
+ const char *name;
+
+ type = xlnx_video_component_type(component);
+ name = xlnx_video_component_name(component);
+
+ printf("- Component %u: type %s name %s\n", i,
+ component_type_name(type), name);
+ }
+
+ free(components);
+}
+
+/* -----------------------------------------------------------------------------
+ * Command Line Parsing
+ */
+
+static unsigned int opt_debug;
+static bool opt_list_components;
+static const char *opt_plugins_directory;
+
+static void usage(const char *argv0)
+{
+ printf("%s [options]\n", argv0);
+ printf("-c, --components List available components\n");
+ printf("-d, --debug level Set the debug level (0-4, default: 0)\n");
+ printf("-h, --help Show this help message and exit\n");
+ printf("-p, --plugins dir Load plugins from given directory\n");
+}
+
+static struct option opts[] = {
+ {"components", 0, 0, 'c'},
+ {"debug", 1, 0, 'd'},
+ {"help", 0, 0, 'h'},
+ {"plugins", 1, 0, 'p'},
+};
+
+static int parse_cmdline(int argc, char **argv)
+{
+ char *endp;
+ int opt;
+
+ /* Parse options */
+ while ((opt = getopt_long(argc, argv, "cd:hp:", opts, NULL)) != -1) {
+ switch (opt) {
+ case 'c':
+ opt_list_components = true;
+ break;
+
+ case 'd':
+ opt_debug = strtoul(optarg, &endp, 10);
+ if (*endp != '\0') {
+ fprintf(stderr, "Invalid debug level %s\n", optarg);
+ usage(argv[0]);
+ return 1;
+ }
+ break;
+
+ case 'h':
+ usage(argv[0]);
+ return 1;
+
+ case 'p':
+ opt_plugins_directory = optarg;
+ break;
+ }
+ }
+
+ return 0;
+}
+
+/* -----------------------------------------------------------------------------
+ * Main
+ */
+
+int main(int argc, char *argv[])
+{
+ struct xlnx_video *xv;
+ int ret;
+
+ ret = parse_cmdline(argc, argv);
+ if (ret)
+ return ret;
+
+ xv = xlnx_video_create();
+ if (!xv) {
+ printf("Failed to create a library context\n");
+ return 1;
+ }
+
+ if (opt_debug)
+ xlnx_video_set_log_level(xv, opt_debug);
+
+ ret = xlnx_events_init(xv);
+ if (ret < 0) {
+ printf("Failed to initialize events handling\n");
+ goto done;
+ }
+
+ ret = xlnx_video_setup(xv);
+ if (ret < 0) {
+ printf("Failed to setup the library context\n");
+ goto done;
+ }
+
+ if (opt_plugins_directory) {
+ ret = xlnx_video_plugin_load_directory(xv, opt_plugins_directory);
+ if (ret < 0) {
+ printf("Failed to load plugins from directory `%s'\n",
+ opt_plugins_directory);
+ goto done;
+ }
+
+ printf("Loaded %u plugin%s from directory `%s'\n", ret,
+ ret != 1 ? "s" : "", opt_plugins_directory);
+ }
+
+ ret = xlnx_video_component_enumerate(xv);
+ if (ret < 0) {
+ printf("Failed to enumerate components\n");
+ goto done;
+ }
+
+ if (opt_list_components)
+ list_components(xv);
+
+done:
+ xlnx_events_fini(xv);
+ xlnx_video_destroy(xv);
+ return ret;
+}