Libav
oggdec.h
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1 
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;
34  const int8_t *name;
41  int (*header)(AVFormatContext *, int);
42  int (*packet)(AVFormatContext *, int);
48  uint64_t (*gptopts)(AVFormatContext *, int, uint64_t, int64_t *dts);
57  int nb_header;
58  void (*cleanup)(AVFormatContext *s, int idx);
59 };
60 
61 struct ogg_stream {
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;
75  int64_t page_pos;
76  int flags;
77  const struct ogg_codec *codec;
78  int header;
79  int nsegs, segp;
81  int incomplete;
82  int page_end;
84  int nb_header;
85  void *private;
86 };
87 
88 struct ogg_state {
89  uint64_t pos;
90  int curidx;
91  struct ogg_state *next;
92  int nstreams;
93  struct ogg_stream streams[1];
94 };
95 
96 struct ogg {
98  int nstreams;
99  int headers;
100  int curidx;
101  struct ogg_state *state;
102 };
103 
104 #define OGG_FLAG_CONT 1
105 #define OGG_FLAG_BOS 2
106 #define OGG_FLAG_EOS 4
107 
108 #define OGG_NOGRANULE_VALUE -1ull
109 
110 extern const struct ogg_codec ff_celt_codec;
111 extern const struct ogg_codec ff_dirac_codec;
112 extern const struct ogg_codec ff_flac_codec;
113 extern const struct ogg_codec ff_ogm_audio_codec;
114 extern const struct ogg_codec ff_ogm_old_codec;
115 extern const struct ogg_codec ff_ogm_text_codec;
116 extern const struct ogg_codec ff_ogm_video_codec;
117 extern const struct ogg_codec ff_old_dirac_codec;
118 extern const struct ogg_codec ff_old_flac_codec;
119 extern const struct ogg_codec ff_opus_codec;
120 extern const struct ogg_codec ff_skeleton_codec;
121 extern const struct ogg_codec ff_speex_codec;
122 extern const struct ogg_codec ff_theora_codec;
123 extern const struct ogg_codec ff_vorbis_codec;
124 
125 int ff_vorbis_comment(AVFormatContext *ms, AVDictionary **m, const uint8_t *buf, int size);
126 
127 static inline int
128 ogg_find_stream (struct ogg * ogg, int serial)
129 {
130  int i;
131 
132  for (i = 0; i < ogg->nstreams; i++)
133  if (ogg->streams[i].serial == serial)
134  return i;
135 
136  return -1;
137 }
138 
139 static inline uint64_t
140 ogg_gptopts (AVFormatContext * s, int i, uint64_t gp, int64_t *dts)
141 {
142  struct ogg *ogg = s->priv_data;
143  struct ogg_stream *os = ogg->streams + i;
144  uint64_t pts = AV_NOPTS_VALUE;
145 
146  if(os->codec && os->codec->gptopts){
147  pts = os->codec->gptopts(s, i, gp, dts);
148  } else {
149  pts = gp;
150  if (dts)
151  *dts = pts;
152  }
153 
154  return pts;
155 }
156 
157 #endif /* AVFORMAT_OGGDEC_H */