More hacking

Add spa based v4l2 pinos module
Add allocation params to port_alloc_buffers
Let the app do allocation for handles.

spa/plugins/ffmpeg/ffmpeg.c

@@ -0,0 +1,109 @@
+/* Spa V4l2 support
+ * Copyright (C) 2016 Wim Taymans <wim.taymans@gmail.com>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 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
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+ */
+
+#include <stdio.h>
+
+#include <spa/plugin.h>
+#include <spa/node.h>
+
+#include <libavcodec/avcodec.h>
+#include <libavformat/avformat.h>
+
+SpaResult spa_ffmpeg_dec_init (SpaHandle *handle);
+SpaResult spa_ffmpeg_enc_init (SpaHandle *handle);
+
+static SpaResult
+ffmpeg_dec_init (const SpaHandleFactory  *factory,
+                 SpaHandle               *handle)
+{
+  if (factory == NULL || handle == NULL)
+    return SPA_RESULT_INVALID_ARGUMENTS;
+
+  return spa_ffmpeg_dec_init (handle);
+}
+
+static SpaResult
+ffmpeg_enc_init (const SpaHandleFactory  *factory,
+                 SpaHandle               *handle)
+{
+  if (factory == NULL || handle == NULL)
+    return SPA_RESULT_INVALID_ARGUMENTS;
+
+  return spa_ffmpeg_enc_init (handle);
+}
+
+static const SpaInterfaceInfo ffmpeg_interfaces[] =
+{
+  { SPA_INTERFACE_ID_NODE,
+    SPA_INTERFACE_ID_NODE_NAME,
+    SPA_INTERFACE_ID_NODE_DESCRIPTION,
+  },
+};
+
+static SpaResult
+ffmpeg_enum_interface_info (const SpaHandleFactory  *factory,
+                            unsigned int             index,
+                            const SpaInterfaceInfo **info)
+{
+  if (index >= 1)
+    return SPA_RESULT_ENUM_END;
+
+  *info = &ffmpeg_interfaces[index];
+
+  return SPA_RESULT_OK;
+}
+
+SpaResult
+spa_enum_handle_factory (unsigned int             index,
+                         const SpaHandleFactory **factory)
+{
+  static const AVCodec *c = NULL;
+  static int ci = 0;
+  static SpaHandleFactory f;
+  static char name[128];
+
+  av_register_all();
+
+  if (index == 0 || index < ci) {
+    c = av_codec_next (NULL);
+    ci = 0;
+  }
+  while (index > ci && c) {
+    c = av_codec_next (c);
+    ci++;
+  }
+  if (c == NULL)
+    return SPA_RESULT_ENUM_END;
+
+  if (av_codec_is_encoder (c)) {
+    snprintf (name, 128, "ffenc_%s", c->name);
+    f.init = ffmpeg_enc_init;
+  }
+  else {
+    snprintf (name, 128, "ffdec_%s", c->name);
+    f.init = ffmpeg_dec_init;
+  }
+  f.name = name;
+  f.info = NULL;
+  f.enum_interface_info = ffmpeg_enum_interface_info;
+
+  *factory = &f;
+
+  return SPA_RESULT_OK;
+}