00001
00025 #ifndef AVFORMAT_OGGDEC_H
00026 #define AVFORMAT_OGGDEC_H
00027
00028 #include "avformat.h"
00029 #include "metadata.h"
00030
00031 struct ogg_codec {
00032 const int8_t *magic;
00033 uint8_t magicsize;
00034 const int8_t *name;
00041 int (*header)(AVFormatContext *, int);
00042 int (*packet)(AVFormatContext *, int);
00048 uint64_t (*gptopts)(AVFormatContext *, int, uint64_t, int64_t *dts);
00053 int granule_is_start;
00054 };
00055
00056 struct ogg_stream {
00057 uint8_t *buf;
00058 unsigned int bufsize;
00059 unsigned int bufpos;
00060 unsigned int pstart;
00061 unsigned int psize;
00062 unsigned int pflags;
00063 unsigned int pduration;
00064 uint32_t serial;
00065 uint64_t granule;
00066 int64_t lastpts;
00067 int64_t lastdts;
00068 int64_t sync_pos;
00069 int64_t page_pos;
00070 int flags;
00071 const struct ogg_codec *codec;
00072 int header;
00073 int nsegs, segp;
00074 uint8_t segments[255];
00075 int incomplete;
00076 int page_end;
00077 int keyframe_seek;
00078 void *private;
00079 };
00080
00081 struct ogg_state {
00082 uint64_t pos;
00083 int curidx;
00084 struct ogg_state *next;
00085 int nstreams;
00086 struct ogg_stream streams[1];
00087 };
00088
00089 struct ogg {
00090 struct ogg_stream *streams;
00091 int nstreams;
00092 int headers;
00093 int curidx;
00094 struct ogg_state *state;
00095 };
00096
00097 #define OGG_FLAG_CONT 1
00098 #define OGG_FLAG_BOS 2
00099 #define OGG_FLAG_EOS 4
00100
00101 extern const struct ogg_codec ff_dirac_codec;
00102 extern const struct ogg_codec ff_flac_codec;
00103 extern const struct ogg_codec ff_ogm_audio_codec;
00104 extern const struct ogg_codec ff_ogm_old_codec;
00105 extern const struct ogg_codec ff_ogm_text_codec;
00106 extern const struct ogg_codec ff_ogm_video_codec;
00107 extern const struct ogg_codec ff_old_dirac_codec;
00108 extern const struct ogg_codec ff_old_flac_codec;
00109 extern const struct ogg_codec ff_skeleton_codec;
00110 extern const struct ogg_codec ff_speex_codec;
00111 extern const struct ogg_codec ff_theora_codec;
00112 extern const struct ogg_codec ff_vorbis_codec;
00113
00114 int ff_vorbis_comment(AVFormatContext *ms, AVMetadata **m, const uint8_t *buf, int size);
00115
00116 static inline int
00117 ogg_find_stream (struct ogg * ogg, int serial)
00118 {
00119 int i;
00120
00121 for (i = 0; i < ogg->nstreams; i++)
00122 if (ogg->streams[i].serial == serial)
00123 return i;
00124
00125 return -1;
00126 }
00127
00128 static inline uint64_t
00129 ogg_gptopts (AVFormatContext * s, int i, uint64_t gp, int64_t *dts)
00130 {
00131 struct ogg *ogg = s->priv_data;
00132 struct ogg_stream *os = ogg->streams + i;
00133 uint64_t pts = AV_NOPTS_VALUE;
00134
00135 if(os->codec && os->codec->gptopts){
00136 pts = os->codec->gptopts(s, i, gp, dts);
00137 } else {
00138 pts = gp;
00139 if (dts)
00140 *dts = pts;
00141 }
00142
00143 return pts;
00144 }
00145
00146 #endif
