wrapper/gstreamer plugin based on xcore

sample launch line:

gst-launch-1.0 xcamsrc sensor=0 capturemode=0x4000 memtype=4 \
  buffercount=8 fpsn=25 fpsd=1 width=1920 height=1080        \
  pixelformat=0 field=0 bytesperline=3840                    \
  ! video/x-raw, format=NV12, width=1920, height=1080,       \
    framerate=30/1 ! queue ! vaapiencode_h264 ! fakesink

Makefile.am

@@ -1,2 +1,2 @@
 
-SUBDIRS = xcore tests pkgconfig
+SUBDIRS = xcore wrapper tests pkgconfig 

configure.ac

@@ -142,6 +142,8 @@ AM_CONDITIONAL([USE_LOCAL_AIQ], [test "$USE_LOCAL_AIQ" -eq 1])
 
 AC_CONFIG_FILES([Makefile
                  xcore/Makefile
+                 wrapper/Makefile
+                 wrapper/gstreamer/Makefile
                  tests/Makefile
                  pkgconfig/Makefile
                  pkgconfig/xcam_core.pc

tests/test-xcamsrc-camera.sh

@@ -0,0 +1,3 @@
+#!/bin/bash
+
+gst-launch-1.0 xcamsrc sensor=0 capturemode=0x4000 memtype=4 buffercount=8 fpsn=25 fpsd=1 width=1920 height=1080 pixelformat=0 field=0 bytesperline=3840 ! video/x-raw, format=NV12, width=1920, height=1080, framerate=30/1 ! queue ! vaapiencode_h264 ! fakesink

wrapper/Makefile.am

@@ -0,0 +1 @@
+SUBDIRS = gstreamer

wrapper/gstreamer/Makefile.am

@@ -0,0 +1,69 @@
+lib_LTLIBRARIES = libstub.la
+
+GST_CFLAGS = -I/usr/include/gstreamer-1.0 -I/usr/include/glib-2.0 -I/usr/lib/x86_64-linux-gnu/glib-2.0/include -I/usr/lib/glib-2.0/include
+
+PTHREAD_LDFLAGS = -pthread
+
+STUB_CXXFLAGS = -fPIC -std=c++11
+STUB_LIBS = \
+		   $(NULL)
+
+if HAVE_LIBDRM
+STUB_CXXFLAGS += $(LIBDRM_CFLAGS)
+STUB_LIBS += $(LIBDRM_LIBS)
+endif
+
+libstub_la_SOURCES = stub.cpp bufmap.cpp v4l2dev.cpp fmt.cpp
+
+libstub_la_CXXFLAGS = -I$(top_builddir)/xcore -I$(top_builddir)/xcore/base \
+			$(GST_CFLAGS) \
+			 $(STUB_CXXFLAGS)	\
+			 $(NULL)    
+libstub_la_LDFLAGS = \
+			-no-undefined	\
+			$(PTHREAD_LDFLAGS)  \
+			$(NULL)
+
+libstub_la_LIBADD = $(top_builddir)/xcore/libxcam_core.la \
+		       $(STUB_LIBS)  \
+		       -lpthread \
+		       $(NULL)
+
+noinst_HEADERS = stub.h bufmap.h v4l2dev.h fmt.h
+
+# Note: plugindir is set in configure
+plugindir="\$(libdir)/gstreamer-1.0"
+
+##############################################################################
+# TODO: change libgstxcamsrc.la to something else, e.g. libmysomething.la     #
+##############################################################################
+plugin_LTLIBRARIES = libgstxcamsrc.la
+
+##############################################################################
+# TODO: for the next set of variables, name the prefix if you named the .la, #
+#  e.g. libmysomething.la => libmysomething_la_SOURCES                       #
+#                            libmysomething_la_CFLAGS                        #
+#                            libmysomething_la_LIBADD                        #
+#                            libmysomething_la_LDFLAGS                       #
+##############################################################################
+
+# sources used to compile this plug-in
+libgstxcamsrc_la_SOURCES = gstxcambufferpool.c	\
+			   gstxcamsrc.c
+
+# compiler and linker flags used to compile this plugin, set in configure.ac
+libgstxcamsrc_la_CFLAGS = $(GST_CFLAGS)	\
+			  -I$(top_builddir)/xcore -I$(top_builddir)/xcore/base   \
+			  -I$(top_builddir)/wrapper/gstreamer
+
+libgstxcamsrc_la_LIBADD = $(GST_LIBS)	\
+			  $(top_builddir)/wrapper/gstreamer/libstub.la	\
+			  -lgstvideo-1.0    \
+			  -lgstallocators-1.0
+
+libgstxcamsrc_la_LDFLAGS = $(GST_PLUGIN_LDFLAGS)
+libgstxcamsrc_la_LIBTOOLFLAGS = --tag=disable-static
+
+# headers we need but don't want installed
+noinst_HEADERS = gstxcambufferpool.h	\
+		 gstxcamsrc.h

wrapper/gstreamer/bufmap.cpp

@@ -0,0 +1,38 @@
+/*
+ * bufmap.cpp - map V4l2Buffer to GstBuffer
+ *
+ *  Copyright (c) 2015 Intel Corporation
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * Author: John Ye <john.ye@intel.com>
+ */
+
+#include "bufmap.h"
+
+namespace XCam {
+
+SmartPtr<BufMap> BufMap::_instance(NULL);
+Mutex BufMap::_mutex;
+
+SmartPtr<BufMap>
+BufMap::instance()
+{
+    SmartLock lock(_mutex);
+    if (_instance.ptr())
+        return _instance;
+    _instance = new BufMap;
+    return _instance;
+}
+
+};

wrapper/gstreamer/bufmap.h

@@ -0,0 +1,72 @@
+/*
+ * bufmap.h - map V4l2Buffer to GstBuffer
+ *
+ *  Copyright (c) 2015 Intel Corporation
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * Author: John Ye <john.ye@intel.com>
+ */
+
+#ifndef __BUFMAP_H__
+#define __BUFMAP_H__
+
+#include <gst/gst.h>
+#include <map>
+#include "xcam_defs.h"
+#include "v4l2_buffer_proxy.h"
+#include "atomisp_device.h"
+
+namespace XCam {
+
+class BufMap {
+public:
+    static SmartPtr<BufMap> instance();
+
+    GstBuffer* gbuf(SmartPtr<V4l2Buffer> &buf) {
+        uint32_t vbuf_idx = buf->get_buf().index;
+        if (_v2g.find(vbuf_idx) == _v2g.end()) { //non-existing
+            return NULL;
+        }
+        return _v2g[vbuf_idx];
+    }
+    SmartPtr<V4l2Buffer> vbuf(GstBuffer* gbuf) {
+        if (_g2v.find(gbuf) == _g2v.end()) { //non-existing
+            return NULL;
+        }
+        return _g2v[gbuf];
+    }
+    void setmap(GstBuffer* gbuf, SmartPtr<V4l2Buffer>& buf) {
+        _g2v[gbuf] = buf;
+        _v2g[buf->get_buf().index] = gbuf;
+    }
+
+private:
+    XCAM_DEAD_COPY (BufMap);
+
+private:
+    BufMap()
+        : _g2v(std::map<GstBuffer*, SmartPtr<V4l2Buffer> >())
+        , _v2g(std::map<uint32_t, GstBuffer*>())
+    {};
+
+    static SmartPtr<BufMap> _instance;
+    static Mutex        _mutex;
+
+    std::map <GstBuffer*, SmartPtr<V4l2Buffer> > _g2v;
+    std::map <uint32_t, GstBuffer*> _v2g;
+};
+
+} //namespace
+
+#endif // __BUFMAP_H__

wrapper/gstreamer/fmt.cpp

@@ -0,0 +1,62 @@
+/*
+ * fmt.cpp - deal with the supported formats
+ *
+ *  Copyright (c) 2015 Intel Corporation
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * Author: John Ye <john.ye@intel.com>
+ */
+
+#include "fmt.h"
+#include <linux/videodev2.h>
+
+#include <map>
+
+std::map<uint32_t, GstVideoFormat> fourcc2fmt = {
+
+    { V4L2_PIX_FMT_NV12, GST_VIDEO_FORMAT_NV12 },
+    { V4L2_PIX_FMT_NV21, GST_VIDEO_FORMAT_NV21 },
+    { V4L2_PIX_FMT_YVU410,  GST_VIDEO_FORMAT_YVU9 },
+    { V4L2_PIX_FMT_YUV410,  GST_VIDEO_FORMAT_YUV9 },
+    { V4L2_PIX_FMT_YUV420,  GST_VIDEO_FORMAT_I420 },
+    { V4L2_PIX_FMT_YUYV,    GST_VIDEO_FORMAT_YUY2 },
+    { V4L2_PIX_FMT_YVU420,  GST_VIDEO_FORMAT_YV12 },
+    { V4L2_PIX_FMT_UYVY,    GST_VIDEO_FORMAT_UYVY },
+    { V4L2_PIX_FMT_YUV411P, GST_VIDEO_FORMAT_Y41B },
+    { V4L2_PIX_FMT_YUV422P, GST_VIDEO_FORMAT_Y42B }
+#ifdef V4L2_PIX_FMT_YVYU
+    , { V4L2_PIX_FMT_YVYU, GST_VIDEO_FORMAT_YVYU}
+#endif
+
+};
+
+#define GST_V4L2_MAX_SIZE (1<<15)
+
+void caps_append(GstCaps *caps)
+{
+    GstStructure *structure;
+    std::map<uint32_t, GstVideoFormat>::iterator iter;
+
+    for (iter = fourcc2fmt.begin(); iter != fourcc2fmt.end(); iter++) {
+        structure = gst_structure_new ("video/x-raw",
+                                       "format", G_TYPE_STRING,
+                                       gst_video_format_to_string (iter->second),
+                                       NULL);
+        gst_structure_set (structure,
+                           "width", GST_TYPE_INT_RANGE, 1, GST_V4L2_MAX_SIZE,
+                           "height", GST_TYPE_INT_RANGE, 1, GST_V4L2_MAX_SIZE,
+                           "framerate", GST_TYPE_FRACTION_RANGE, 0, 1, 100, 1, NULL);
+        gst_caps_append_structure (caps, structure);
+    }
+}

wrapper/gstreamer/fmt.h

@@ -0,0 +1,37 @@
+/*
+ * fmt.h - deal with the supported formats
+ *
+ *  Copyright (c) 2015 Intel Corporation
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * Author: John Ye <john.ye@intel.com>
+ */
+
+#ifndef __FMT_H__
+#define __FMT_H__
+
+#include <gst/video/video-format.h>
+#include <stdint.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+void caps_append(GstCaps *caps);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif  // __FMT_H__