blob: 7b080e2a36c2521d8207d3b24af83bc429c9516e
1 | /* |
2 | * "Real" compatible muxer and demuxer. |
3 | * Copyright (c) 2000, 2001 Fabrice Bellard |
4 | * |
5 | * This file is part of FFmpeg. |
6 | * |
7 | * FFmpeg is free software; you can redistribute it and/or |
8 | * modify it under the terms of the GNU Lesser General Public |
9 | * License as published by the Free Software Foundation; either |
10 | * version 2.1 of the License, or (at your option) any later version. |
11 | * |
12 | * FFmpeg is distributed in the hope that it will be useful, |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
15 | * Lesser General Public License for more details. |
16 | * |
17 | * You should have received a copy of the GNU Lesser General Public |
18 | * License along with FFmpeg; if not, write to the Free Software |
19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
20 | */ |
21 | |
22 | #ifndef AVFORMAT_RM_H |
23 | #define AVFORMAT_RM_H |
24 | |
25 | #include "avformat.h" |
26 | #include "internal.h" |
27 | |
28 | extern const char * const ff_rm_metadata[4]; |
29 | extern const AVCodecTag ff_rm_codec_tags[]; |
30 | |
31 | typedef struct RMStream RMStream; |
32 | |
33 | RMStream *ff_rm_alloc_rmstream (void); |
34 | void ff_rm_free_rmstream (RMStream *rms); |
35 | |
36 | /*< input format for Realmedia-style RTSP streams */ |
37 | extern AVInputFormat ff_rdt_demuxer; |
38 | |
39 | /** |
40 | * Read the MDPR chunk, which contains stream-specific codec initialization |
41 | * parameters. |
42 | * |
43 | * @param s context containing RMContext and AVIOContext for stream reading |
44 | * @param pb context to read the data from |
45 | * @param st the stream that the MDPR chunk belongs to and where to store the |
46 | * parameters read from the chunk into |
47 | * @param rst real-specific stream information |
48 | * @param codec_data_size size of the MDPR chunk |
49 | * @return 0 on success, errno codes on error |
50 | */ |
51 | int ff_rm_read_mdpr_codecdata (AVFormatContext *s, AVIOContext *pb, |
52 | AVStream *st, RMStream *rst, |
53 | unsigned int codec_data_size, const uint8_t *mime); |
54 | |
55 | /** |
56 | * Parse one rm-stream packet from the input bytestream. |
57 | * |
58 | * @param s context containing RMContext and AVIOContext for stream reading |
59 | * @param pb context to read the data from |
60 | * @param st stream to which the packet to be read belongs |
61 | * @param rst Real-specific stream information |
62 | * @param len packet length to read from the input |
63 | * @param pkt packet location to store the parsed packet data |
64 | * @param seq pointer to an integer containing the sequence number, may be |
65 | * updated |
66 | * @param flags the packet flags |
67 | * @param ts timestamp of the current packet |
68 | * @return <0 on error, 0 if a packet was placed in the pkt pointer. A |
69 | * value >0 means that no data was placed in pkt, but that cached |
70 | * data is available by calling ff_rm_retrieve_cache(). |
71 | */ |
72 | int ff_rm_parse_packet (AVFormatContext *s, AVIOContext *pb, |
73 | AVStream *st, RMStream *rst, int len, |
74 | AVPacket *pkt, int *seq, int flags, int64_t ts); |
75 | |
76 | /** |
77 | * Retrieve one cached packet from the rm-context. The real container can |
78 | * store several packets (as interpreted by the codec) in a single container |
79 | * packet, which means the demuxer holds some back when the first container |
80 | * packet is parsed and returned. The result is that rm->audio_pkt_cnt is |
81 | * a positive number, the amount of cached packets. Using this function, each |
82 | * of those packets can be retrieved sequentially. |
83 | * |
84 | * @param s context containing RMContext and AVIOContext for stream reading |
85 | * @param pb context to read the data from |
86 | * @param st stream that this packet belongs to |
87 | * @param rst Real-specific stream information |
88 | * @param pkt location to store the packet data |
89 | * @return the number of samples left for subsequent calls to this same |
90 | * function, or 0 if all samples have been retrieved. |
91 | */ |
92 | int ff_rm_retrieve_cache (AVFormatContext *s, AVIOContext *pb, |
93 | AVStream *st, RMStream *rst, AVPacket *pkt); |
94 | |
95 | #endif /* AVFORMAT_RM_H */ |
96 |