decoder/ffmpeg: move struct AvioStream to FfmpegIo.hxx

1 files changed, 88 insertions, 0 deletions

diff --git a/src/decoder/plugins/FfmpegIo.cxx b/src/decoder/plugins/FfmpegIo.cxx
new file mode 100644
index 000000000..12df15bb2
--- /dev/null
+++ b/src/decoder/plugins/FfmpegIo.cxx
@@ -0,0 +1,88 @@
+/*
+ * 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.
+ */
+
+/* necessary because libavutil/common.h uses UINT64_C */
+#define __STDC_CONSTANT_MACROS
+
+#include "config.h"
+#include "FfmpegIo.hxx"
+#include "../DecoderAPI.hxx"
+#include "input/InputStream.hxx"
+#include "util/Error.hxx"
+
+AvioStream::~AvioStream()
+{
+	av_free(io);
+}
+
+static int
+mpd_ffmpeg_stream_read(void *opaque, uint8_t *buf, int size)
+{
+	AvioStream *stream = (AvioStream *)opaque;
+
+	return decoder_read(stream->decoder, stream->input,
+			    (void *)buf, size);
+}
+
+static int64_t
+mpd_ffmpeg_stream_seek(void *opaque, int64_t pos, int whence)
+{
+	AvioStream *stream = (AvioStream *)opaque;
+
+	switch (whence) {
+	case SEEK_SET:
+		break;
+
+	case SEEK_CUR:
+		pos += stream->input.GetOffset();
+		break;
+
+	case SEEK_END:
+		if (!stream->input.KnownSize())
+			return -1;
+
+		pos += stream->input.GetSize();
+		break;
+
+	case AVSEEK_SIZE:
+		if (!stream->input.KnownSize())
+			return -1;
+
+		return stream->input.GetSize();
+
+	default:
+		return -1;
+	}
+
+	if (!stream->input.LockSeek(pos, IgnoreError()))
+		return -1;
+
+	return stream->input.GetOffset();
+}
+
+bool
+AvioStream::Open()
+{
+	io = avio_alloc_context(buffer, sizeof(buffer),
+				false, this,
+				mpd_ffmpeg_stream_read, nullptr,
+				input.IsSeekable()
+				? mpd_ffmpeg_stream_seek : nullptr);
+	return io != nullptr;
+}