decoder/ffmpeg: move code to class FfmpegBuffer

1 files changed, 73 insertions, 0 deletions

diff --git a/src/lib/ffmpeg/Buffer.hxx b/src/lib/ffmpeg/Buffer.hxx
new file mode 100644
index 000000000..eab1be8ce
--- /dev/null
+++ b/src/lib/ffmpeg/Buffer.hxx
@@ -0,0 +1,73 @@
+/*
+ * Copyright (C) 2003-2014 The Music Player Daemon Project
+ * http://www.musicpd.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.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#ifndef MPD_FFMPEG_BUFFER_HXX
+#define MPD_FFMPEG_BUFFER_HXX
+
+extern "C" {
+#include <libavutil/avutil.h>
+
+#if LIBAVUTIL_VERSION_INT >= AV_VERSION_INT(52, 18, 0)
+#define HAVE_AV_FAST_MALLOC
+#include <libavutil/mem.h>
+#else
+#include <libavcodec/avcodec.h>
+#if LIBAVCODEC_VERSION_INT >= AV_VERSION_INT(52, 25, 0)
+#define HAVE_AV_FAST_MALLOC
+#endif
+#endif
+}
+
+#include <stddef.h>
+
+/* suppress the ffmpeg compatibility macro */
+#ifdef SampleFormat
+#undef SampleFormat
+#endif
+
+class FfmpegBuffer {
+	void *data;
+	unsigned size;
+
+public:
+	FfmpegBuffer():data(nullptr), size(0) {}
+
+	~FfmpegBuffer() {
+		av_free(data);
+	}
+
+	void *Get(size_t min_size) {
+#ifdef HAVE_AV_FAST_MALLOC
+		av_fast_malloc(&data, &size, min_size);
+#else
+		void *new_data = av_fast_realloc(data, &size, min_size);
+		if (new_data == nullptr)
+			return AVERROR(ENOMEM);
+		data = new_data;
+#endif
+		return data;
+	}
+
+	template<typename T>
+	T *GetT(size_t n) {
+		return (T *)Get(n * sizeof(T));
+	}
+};
+
+#endif