ffmpeg-2.8.5

git-svn-id: svn://kolibrios.org@6147 a494cfbc-eb01-0410-851d-a64ba20cac60

contrib/sdk/sources/ffmpeg/ffmpeg-2.8/libavformat/rm.h

@@ -0,0 +1,95 @@
+/*
+ * "Real" compatible muxer and demuxer.
+ * Copyright (c) 2000, 2001 Fabrice Bellard
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg 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; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg 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 FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVFORMAT_RM_H
+#define AVFORMAT_RM_H
+
+#include "avformat.h"
+#include "internal.h"
+
+extern const char * const ff_rm_metadata[4];
+extern const AVCodecTag ff_rm_codec_tags[];
+
+typedef struct RMStream RMStream;
+
+RMStream *ff_rm_alloc_rmstream (void);
+void      ff_rm_free_rmstream  (RMStream *rms);
+
+/*< input format for Realmedia-style RTSP streams */
+extern AVInputFormat ff_rdt_demuxer;
+
+/**
+ * Read the MDPR chunk, which contains stream-specific codec initialization
+ * parameters.
+ *
+ * @param s context containing RMContext and AVIOContext for stream reading
+ * @param pb context to read the data from
+ * @param st the stream that the MDPR chunk belongs to and where to store the
+ *           parameters read from the chunk into
+ * @param rst real-specific stream information
+ * @param codec_data_size size of the MDPR chunk
+ * @return 0 on success, errno codes on error
+ */
+int ff_rm_read_mdpr_codecdata (AVFormatContext *s, AVIOContext *pb,
+                               AVStream *st, RMStream *rst,
+                               unsigned int codec_data_size, const uint8_t *mime);
+
+/**
+ * Parse one rm-stream packet from the input bytestream.
+ *
+ * @param s context containing RMContext and AVIOContext for stream reading
+ * @param pb context to read the data from
+ * @param st stream to which the packet to be read belongs
+ * @param rst Real-specific stream information
+ * @param len packet length to read from the input
+ * @param pkt packet location to store the parsed packet data
+ * @param seq pointer to an integer containing the sequence number, may be
+ *            updated
+ * @param flags the packet flags
+ * @param ts timestamp of the current packet
+ * @return <0 on error, 0 if a packet was placed in the pkt pointer. A
+ *         value >0 means that no data was placed in pkt, but that cached
+ *         data is available by calling ff_rm_retrieve_cache().
+ */
+int ff_rm_parse_packet (AVFormatContext *s, AVIOContext *pb,
+                        AVStream *st, RMStream *rst, int len,
+                        AVPacket *pkt, int *seq, int flags, int64_t ts);
+
+/**
+ * Retrieve one cached packet from the rm-context. The real container can
+ * store several packets (as interpreted by the codec) in a single container
+ * packet, which means the demuxer holds some back when the first container
+ * packet is parsed and returned. The result is that rm->audio_pkt_cnt is
+ * a positive number, the amount of cached packets. Using this function, each
+ * of those packets can be retrieved sequentially.
+ *
+ * @param s context containing RMContext and AVIOContext for stream reading
+ * @param pb context to read the data from
+ * @param st stream that this packet belongs to
+ * @param rst Real-specific stream information
+ * @param pkt location to store the packet data
+ * @return the number of samples left for subsequent calls to this same
+ *          function, or 0 if all samples have been retrieved.
+ */
+int ff_rm_retrieve_cache (AVFormatContext *s, AVIOContext *pb,
+                          AVStream *st, RMStream *rst, AVPacket *pkt);
+
+#endif /* AVFORMAT_RM_H */