libav 0.7: Add AVIO interface to evbuffer, replacing ffmpeg_url_evbuffer

src/avio_evbuffer.c

@@ -0,0 +1,110 @@
+/*
+ * Copyright (C) 2011 Julien BLACHE <jb@jblache.org>
+ *
+ * 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#include <stdlib.h>
+
+#include <libavformat/avformat.h>
+
+#include <event.h>
+
+#include "logger.h"
+#include "avio_evbuffer.h"
+
+/*
+ * libav AVIO interface for evbuffers
+ */
+
+#define BUFFER_SIZE 4096
+
+struct avio_evbuffer {
+  struct evbuffer *evbuf;
+  uint8_t *buffer;
+};
+
+
+static int
+avio_evbuffer_write(void *opaque, uint8_t *buf, int size)
+{
+  struct avio_evbuffer *ae;
+  int ret;
+
+  ae = (struct avio_evbuffer *)opaque;
+
+  ret = evbuffer_add(ae->evbuf, buf, size);
+
+  return (ret == 0) ? size : -1;
+}
+
+AVIOContext *
+avio_evbuffer_open(struct evbuffer *evbuf)
+{
+  struct avio_evbuffer *ae;
+  AVIOContext *s;
+
+  ae = (struct avio_evbuffer *)malloc(sizeof(struct avio_evbuffer));
+  if (!ae)
+    {
+      DPRINTF(E_LOG, L_FFMPEG, "Out of memory for avio_evbuffer\n");
+
+      return NULL;
+    }
+
+  ae->buffer = av_mallocz(BUFFER_SIZE);
+  if (!ae->buffer)
+    {
+      DPRINTF(E_LOG, L_FFMPEG, "Out of memory for avio buffer\n");
+
+      free(ae);
+      return NULL;
+    }
+
+  ae->evbuf = evbuf;
+
+  s = avio_alloc_context(ae->buffer, BUFFER_SIZE, 1, ae, NULL, avio_evbuffer_write, NULL);
+  if (!s)
+    {
+      DPRINTF(E_LOG, L_FFMPEG, "Could not allocate AVIOContext\n");
+
+      av_free(ae->buffer);
+      free(ae);
+      return NULL;
+    }
+
+  s->seekable = 0;
+
+  return s;
+}
+
+void
+avio_evbuffer_close(AVIOContext *s)
+{
+  struct avio_evbuffer *ae;
+
+  ae = (struct avio_evbuffer *)s->opaque;
+
+  avio_flush(s);
+
+  av_free(ae->buffer);
+  free(ae);
+
+  av_free(s);
+}

src/avio_evbuffer.h

@@ -0,0 +1,11 @@
+
+#ifndef __AVIO_EVBUFFER_H__
+#define __AVIO_EVBUFFER_H__
+
+AVIOContext *
+avio_evbuffer_open(struct evbuffer *evbuf);
+
+void
+avio_evbuffer_close(AVIOContext *s);
+
+#endif /* !__AVIO_EVBUFFER_H__ */