| 1 | /** |
| 2 | Copyright (C) 2005 Michael Ahlberg, Måns Rullgård |
| 3 | |
| 4 | Permission is hereby granted, free of charge, to any person |
| 5 | obtaining a copy of this software and associated documentation |
| 6 | files (the "Software"), to deal in the Software without |
| 7 | restriction, including without limitation the rights to use, copy, |
| 8 | modify, merge, publish, distribute, sublicense, and/or sell copies |
| 9 | of the Software, and to permit persons to whom the Software is |
| 10 | furnished to do so, subject to the following conditions: |
| 11 | |
| 12 | The above copyright notice and this permission notice shall be |
| 13 | included in all copies or substantial portions of the Software. |
| 14 | |
| 15 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
| 16 | EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| 17 | MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
| 18 | NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT |
| 19 | HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, |
| 20 | WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| 21 | OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER |
| 22 | DEALINGS IN THE SOFTWARE. |
| 23 | **/ |
| 24 | |
| 25 | #ifndef AVFORMAT_OGGDEC_H |
| 26 | #define AVFORMAT_OGGDEC_H |
| 27 | |
| 28 | #include "avformat.h" |
| 29 | #include "metadata.h" |
| 30 | |
| 31 | struct ogg_codec { |
| 32 | const int8_t *magic; |
| 33 | uint8_t magicsize; |
| 34 | const int8_t *name; |
| 35 | /** |
| 36 | * Attempt to process a packet as a header |
| 37 | * @return 1 if the packet was a valid header, |
| 38 | * 0 if the packet was not a header (was a data packet) |
| 39 | * -1 if an error occurred or for unsupported stream |
| 40 | */ |
| 41 | int (*header)(AVFormatContext *, int); |
| 42 | int (*packet)(AVFormatContext *, int); |
| 43 | /** |
| 44 | * Translate a granule into a timestamp. |
| 45 | * Will set dts if non-null and known. |
| 46 | * @return pts |
| 47 | */ |
| 48 | uint64_t (*gptopts)(AVFormatContext *, int, uint64_t, int64_t *dts); |
| 49 | /** |
| 50 | * 1 if granule is the start time of the associated packet. |
| 51 | * 0 if granule is the end time of the associated packet. |
| 52 | */ |
| 53 | int granule_is_start; |
| 54 | /** |
| 55 | * Number of expected headers |
| 56 | */ |
| 57 | int nb_header; |
| 58 | void (*cleanup)(AVFormatContext *s, int idx); |
| 59 | }; |
| 60 | |
| 61 | struct ogg_stream { |
| 62 | uint8_t *buf; |
| 63 | unsigned int bufsize; |
| 64 | unsigned int bufpos; |
| 65 | unsigned int pstart; |
| 66 | unsigned int psize; |
| 67 | unsigned int pflags; |
| 68 | unsigned int pduration; |
| 69 | uint32_t serial; |
| 70 | uint64_t granule; |
| 71 | uint64_t start_granule; |
| 72 | int64_t lastpts; |
| 73 | int64_t lastdts; |
| 74 | int64_t sync_pos; ///< file offset of the first page needed to reconstruct the current packet |
| 75 | int64_t page_pos; ///< file offset of the current page |
| 76 | int flags; |
| 77 | const struct ogg_codec *codec; |
| 78 | int header; |
| 79 | int nsegs, segp; |
| 80 | uint8_t segments[255]; |
| 81 | int incomplete; ///< whether we're expecting a continuation in the next page |
| 82 | int page_end; ///< current packet is the last one completed in the page |
| 83 | int keyframe_seek; |
| 84 | int got_start; |
| 85 | int got_data; ///< 1 if the stream got some data (non-initial packets), 0 otherwise |
| 86 | int nb_header; ///< set to the number of parsed headers |
| 87 | int end_trimming; ///< set the number of packets to drop from the end |
| 88 | uint8_t *new_metadata; |
| 89 | unsigned int new_metadata_size; |
| 90 | void *private; |
| 91 | }; |
| 92 | |
| 93 | struct ogg_state { |
| 94 | uint64_t pos; |
| 95 | int curidx; |
| 96 | struct ogg_state *next; |
| 97 | int nstreams; |
| 98 | struct ogg_stream streams[1]; |
| 99 | }; |
| 100 | |
| 101 | struct ogg { |
| 102 | struct ogg_stream *streams; |
| 103 | int nstreams; |
| 104 | int headers; |
| 105 | int curidx; |
| 106 | int64_t page_pos; ///< file offset of the current page |
| 107 | struct ogg_state *state; |
| 108 | }; |
| 109 | |
| 110 | #define OGG_FLAG_CONT 1 |
| 111 | #define OGG_FLAG_BOS 2 |
| 112 | #define OGG_FLAG_EOS 4 |
| 113 | |
| 114 | #define OGG_NOGRANULE_VALUE (-1ull) |
| 115 | |
| 116 | extern const struct ogg_codec ff_celt_codec; |
| 117 | extern const struct ogg_codec ff_dirac_codec; |
| 118 | extern const struct ogg_codec ff_flac_codec; |
| 119 | extern const struct ogg_codec ff_ogm_audio_codec; |
| 120 | extern const struct ogg_codec ff_ogm_old_codec; |
| 121 | extern const struct ogg_codec ff_ogm_text_codec; |
| 122 | extern const struct ogg_codec ff_ogm_video_codec; |
| 123 | extern const struct ogg_codec ff_old_dirac_codec; |
| 124 | extern const struct ogg_codec ff_old_flac_codec; |
| 125 | extern const struct ogg_codec ff_opus_codec; |
| 126 | extern const struct ogg_codec ff_skeleton_codec; |
| 127 | extern const struct ogg_codec ff_speex_codec; |
| 128 | extern const struct ogg_codec ff_theora_codec; |
| 129 | extern const struct ogg_codec ff_vorbis_codec; |
| 130 | extern const struct ogg_codec ff_vp8_codec; |
| 131 | |
| 132 | int ff_vorbis_comment(AVFormatContext *ms, AVDictionary **m, |
| 133 | const uint8_t *buf, int size, int parse_picture); |
| 134 | |
| 135 | int ff_vorbis_stream_comment(AVFormatContext *as, AVStream *st, |
| 136 | const uint8_t *buf, int size); |
| 137 | |
| 138 | static inline int |
| 139 | ogg_find_stream (struct ogg * ogg, int serial) |
| 140 | { |
| 141 | int i; |
| 142 | |
| 143 | for (i = 0; i < ogg->nstreams; i++) |
| 144 | if (ogg->streams[i].serial == serial) |
| 145 | return i; |
| 146 | |
| 147 | return -1; |
| 148 | } |
| 149 | |
| 150 | static inline uint64_t |
| 151 | ogg_gptopts (AVFormatContext * s, int i, uint64_t gp, int64_t *dts) |
| 152 | { |
| 153 | struct ogg *ogg = s->priv_data; |
| 154 | struct ogg_stream *os = ogg->streams + i; |
| 155 | uint64_t pts = AV_NOPTS_VALUE; |
| 156 | |
| 157 | if(os->codec && os->codec->gptopts){ |
| 158 | pts = os->codec->gptopts(s, i, gp, dts); |
| 159 | } else { |
| 160 | pts = gp; |
| 161 | if (dts) |
| 162 | *dts = pts; |
| 163 | } |
| 164 | |
| 165 | return pts; |
| 166 | } |
| 167 | |
| 168 | #endif /* AVFORMAT_OGGDEC_H */ |