Revert "Prepare for O_DIRECT"

[frescor/ffmpeg.git] / libavformat / rm.h

diff --git a/libavformat/rm.h b/libavformat/rm.h
index 2e307c2125ed8be1ac1c833ed2ce524d26f87deb..53dd019cded31a1328c4276a7ffa408881d5ba59 100644 (file)
--- a/libavformat/rm.h
+++ b/libavformat/rm.h
@@ -1,6 +1,6 @@
 /*
  * "Real" compatible muxer and demuxer.
- * Copyright (c) 2000, 2001 Fabrice Bellard.
+ * Copyright (c) 2000, 2001 Fabrice Bellard
  *
  * This file is part of FFmpeg.
  *
@@ -19,42 +19,76 @@
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
-#ifndef RM_H
-#define RM_H
+#ifndef AVFORMAT_RM_H
+#define AVFORMAT_RM_H
 
 #include "avformat.h"
 
+extern const char *ff_rm_metadata[4];
 
-typedef struct {
-    int nb_packets;
-    int packet_total_size;
-    int packet_max_size;
-    /* codec related output */
-    int bit_rate;
-    float frame_rate;
-    int nb_frames;    /* current frame number */
-    int total_frames; /* total number of frames */
-    int num;
-    AVCodecContext *enc;
-} StreamInfo;
-
-typedef struct {
-    StreamInfo streams[2];
-    StreamInfo *audio_stream, *video_stream;
-    int data_pos; /* position of the data after the header */
-    int nb_packets;
-    int old_format;
-    int current_stream;
-    int remaining_len;
-    /// Audio descrambling matrix parameters
-    uint8_t *audiobuf; ///< place to store reordered audio data
-    int64_t audiotimestamp; ///< Audio packet timestamp
-    int sub_packet_cnt; // Subpacket counter, used while reading
-    int sub_packet_size, sub_packet_h, coded_framesize; ///< Descrambling parameters from container
-    int audio_stream_num; ///< Stream number for audio packets
-    int audio_pkt_cnt; ///< Output packet counter
-    int audio_framesize; /// Audio frame size from container
-    int sub_packet_lengths[16]; /// Length of each aac subpacket
-} RMContext;
-
-#endif /* RM_H */
+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 rdt_demuxer;
+
+/**
+ * Read the MDPR chunk, which contains stream-specific codec initialization
+ * parameters.
+ *
+ * @param s context containing RMContext and ByteIOContext 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, ByteIOContext *pb,
+                               AVStream *st, RMStream *rst,
+                               int codec_data_size);
+
+/**
+ * Parse one rm-stream packet from the input bytestream.
+ *
+ * @param s context containing RMContext and ByteIOContext 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 pointer to an integer containing the packet flags, may be
+                updated
+ * @param ts pointer to timestamp, may be updated
+ * @return <0 on error, 0 if a packet was placed in the \p pkt pointer. A
+ *         value >0 means that no data was placed in \p pkt, but that cached
+ *         data is available by calling ff_rm_retrieve_cache().
+ */
+int ff_rm_parse_packet (AVFormatContext *s, ByteIOContext *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 ByteIOContext 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
+ * @returns 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, ByteIOContext *pb,
+                          AVStream *st, RMStream *rst, AVPacket *pkt);
+
+#endif /* AVFORMAT_RM_H */