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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 4349 | Serge | 1 | /* |
| 2 | * "Real" compatible muxer and demuxer. |
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| 3 | * Copyright (c) 2000, 2001 Fabrice Bellard |
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| 4 | * |
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| 5 | * This file is part of FFmpeg. |
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| 6 | * |
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| 7 | * FFmpeg is free software; you can redistribute it and/or |
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| 8 | * modify it under the terms of the GNU Lesser General Public |
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| 9 | * License as published by the Free Software Foundation; either |
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| 10 | * version 2.1 of the License, or (at your option) any later version. |
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| 11 | * |
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| 12 | * FFmpeg is distributed in the hope that it will be useful, |
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| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 15 | * Lesser General Public License for more details. |
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| 16 | * |
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| 17 | * You should have received a copy of the GNU Lesser General Public |
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| 18 | * License along with FFmpeg; if not, write to the Free Software |
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| 19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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| 20 | */ |
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| 21 | |||
| 22 | #ifndef AVFORMAT_RM_H |
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| 23 | #define AVFORMAT_RM_H |
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| 24 | |||
| 25 | #include "avformat.h" |
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| 26 | #include "internal.h" |
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| 27 | |||
| 28 | extern const char * const ff_rm_metadata[4]; |
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| 29 | extern const AVCodecTag ff_rm_codec_tags[]; |
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| 30 | |||
| 31 | typedef struct RMStream RMStream; |
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| 32 | |||
| 33 | RMStream *ff_rm_alloc_rmstream (void); |
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| 34 | void ff_rm_free_rmstream (RMStream *rms); |
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| 35 | |||
| 36 | /*< input format for Realmedia-style RTSP streams */ |
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| 37 | extern AVInputFormat ff_rdt_demuxer; |
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| 38 | |||
| 39 | /** |
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| 40 | * Read the MDPR chunk, which contains stream-specific codec initialization |
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| 41 | * parameters. |
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| 42 | * |
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| 43 | * @param s context containing RMContext and AVIOContext for stream reading |
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| 44 | * @param pb context to read the data from |
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| 45 | * @param st the stream that the MDPR chunk belongs to and where to store the |
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| 46 | * parameters read from the chunk into |
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| 47 | * @param rst real-specific stream information |
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| 48 | * @param codec_data_size size of the MDPR chunk |
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| 49 | * @return 0 on success, errno codes on error |
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| 50 | */ |
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| 51 | int ff_rm_read_mdpr_codecdata (AVFormatContext *s, AVIOContext *pb, |
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| 52 | AVStream *st, RMStream *rst, |
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| 53 | int codec_data_size, const uint8_t *mime); |
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| 54 | |||
| 55 | /** |
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| 56 | * Parse one rm-stream packet from the input bytestream. |
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| 57 | * |
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| 58 | * @param s context containing RMContext and AVIOContext for stream reading |
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| 59 | * @param pb context to read the data from |
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| 60 | * @param st stream to which the packet to be read belongs |
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| 61 | * @param rst Real-specific stream information |
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| 62 | * @param len packet length to read from the input |
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| 63 | * @param pkt packet location to store the parsed packet data |
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| 64 | * @param seq pointer to an integer containing the sequence number, may be |
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| 65 | * updated |
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| 66 | * @param flags the packet flags |
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| 67 | * @param ts timestamp of the current packet |
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| 68 | * @return <0 on error, 0 if a packet was placed in the pkt pointer. A |
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| 69 | * value >0 means that no data was placed in pkt, but that cached |
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| 70 | * data is available by calling ff_rm_retrieve_cache(). |
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| 71 | */ |
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| 72 | int ff_rm_parse_packet (AVFormatContext *s, AVIOContext *pb, |
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| 73 | AVStream *st, RMStream *rst, int len, |
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| 74 | AVPacket *pkt, int *seq, int flags, int64_t ts); |
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| 75 | |||
| 76 | /** |
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| 77 | * Retrieve one cached packet from the rm-context. The real container can |
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| 78 | * store several packets (as interpreted by the codec) in a single container |
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| 79 | * packet, which means the demuxer holds some back when the first container |
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| 80 | * packet is parsed and returned. The result is that rm->audio_pkt_cnt is |
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| 81 | * a positive number, the amount of cached packets. Using this function, each |
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| 82 | * of those packets can be retrieved sequentially. |
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| 83 | * |
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| 84 | * @param s context containing RMContext and AVIOContext for stream reading |
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| 85 | * @param pb context to read the data from |
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| 86 | * @param st stream that this packet belongs to |
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| 87 | * @param rst Real-specific stream information |
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| 88 | * @param pkt location to store the packet data |
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| 89 | * @return the number of samples left for subsequent calls to this same |
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| 90 | * function, or 0 if all samples have been retrieved. |
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| 91 | */ |
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| 92 | int ff_rm_retrieve_cache (AVFormatContext *s, AVIOContext *pb, |
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| 93 | AVStream *st, RMStream *rst, AVPacket *pkt); |
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| 94 | |||
| 95 | #endif /* AVFORMAT_RM_H */ |