Initial commit

sys/androidmedia/gstamc.c

@@ -0,0 +1,150 @@
+/*
+ * Copyright (C) 2012, Collabora Ltd.
+ *   Author: Sebastian Dröge <sebastian.droege@collabora.co.uk>, Collabora Ltd.
+ *
+ * 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
+ * version 2.1 of the License.
+ *
+ * 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
+ *
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include "gstamc.h"
+
+#include <gst/gst.h>
+#include <string.h>
+#include <jni.h>
+
+GST_DEBUG_CATEGORY (gst_amc_debug);
+#define GST_CAT_DEFAULT gst_amc_debug
+
+static GModule *java_module;
+static jint (*get_created_java_vms) (JavaVM ** vmBuf, jsize bufLen,
+    jsize * nVMs);
+static jint (*create_java_vm) (JavaVM ** p_vm, JNIEnv ** p_env, void *vm_args);
+static JavaVM *java_vm;
+
+JNIEnv *
+gst_amc_attach_current_thread (void)
+{
+  JNIEnv *env;
+  JavaVMAttachArgs args;
+
+  args.version = JNI_VERSION_1_6;
+  args.name = NULL;
+  args.group = NULL;
+
+  if ((*java_vm)->AttachCurrentThread (java_vm, (void **) &env, &args) < 0) {
+    GST_ERROR ("Failed to attach current thread");
+    return NULL;
+  }
+
+  return env;
+}
+
+void
+gst_amc_detach_current_thread (void)
+{
+  (*java_vm)->DetachCurrentThread (java_vm);
+}
+
+static gboolean
+initialize_java_vm (void)
+{
+  jsize n_vms;
+
+  java_module = g_module_open ("libdvm", G_MODULE_BIND_LOCAL);
+  if (!java_module)
+    goto load_failed;
+
+  if (!g_module_symbol (java_module, "JNI_CreateJavaVM",
+          (gpointer *) & create_java_vm))
+    goto symbol_error;
+
+  if (!g_module_symbol (java_module, "JNI_GetCreatedJavaVMs",
+          (gpointer *) & get_created_java_vms))
+    goto symbol_error;
+
+  n_vms = 0;
+  if (get_created_java_vms (&java_vm, 1, &n_vms) < 0)
+    goto get_created_failed;
+
+  if (n_vms > 0) {
+    GST_DEBUG ("Successfully got existing Java VM %p", java_vm);
+  } else {
+    JNIEnv *env;
+    JavaVMInitArgs vm_args;
+    JavaVMOption options[1];
+
+    /* FIXME: Do we need any options here? Like exit()
+     * handler, or classpaths? */
+    vm_args.version = JNI_VERSION_1_6;
+    vm_args.options = options;
+    vm_args.nOptions = 0;
+    vm_args.ignoreUnrecognized = JNI_TRUE;
+    if (create_java_vm (&java_vm, &env, &vm_args) < 0)
+      goto create_failed;
+    GST_DEBUG ("Successfully created Java VM %p", java_vm);
+  }
+
+  return java_vm != NULL;
+
+load_failed:
+  {
+    GST_ERROR ("Failed to load libdvm: %s", g_module_error ());
+    return FALSE;
+  }
+symbol_error:
+  {
+    GST_ERROR ("Failed to locate required JNI symbols in libdvm: %s",
+        g_module_error ());
+    g_module_close (java_module);
+    java_module = NULL;
+    return FALSE;
+  }
+get_created_failed:
+  {
+    GST_ERROR ("Failed to get already created VMs");
+    g_module_close (java_module);
+    java_module = NULL;
+    return FALSE;
+  }
+create_failed:
+  {
+    GST_ERROR ("Failed to create a Java VM");
+    g_module_close (java_module);
+    java_module = NULL;
+    return FALSE;
+  }
+}
+
+static gboolean
+plugin_init (GstPlugin * plugin)
+{
+  GST_DEBUG_CATEGORY_INIT (gst_amc_debug, "amc", 0, "android-media-codec");
+
+  if (!initialize_java_vm ())
+    return FALSE;
+
+  return TRUE;
+}
+
+GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
+    GST_VERSION_MINOR,
+    "androidmediacodec",
+    "GStreamer Android MediaCodec Plug-ins",
+    plugin_init,
+    PACKAGE_VERSION, GST_LICENSE, GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN)

sys/androidmedia/gstamc.h

@@ -0,0 +1,34 @@
+/*
+ * Copyright (C) 2012, Collabora Ltd.
+ *   Author: Sebastian Dröge <sebastian.droege@collabora.co.uk>, Collabora Ltd.
+ *
+ * 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
+ * version 2.1 of the License.
+ *
+ * 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
+ *
+ */
+
+#ifndef __GST_AMC_H__
+#define __GST_AMC_H__
+
+#include <gst/gst.h>
+#include <jni.h>
+
+G_BEGIN_DECLS
+
+JNIEnv * gst_amc_attach_current_thread (void);
+void     gst_amc_detach_current_thread (void);
+
+G_END_DECLS
+
+#endif /* __GST_AMC_H__ */