FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavformat/oggdec.h
Date: 2022-12-09 07:38:14
Exec Total Coverage
Lines: 16 18 88.9%
Functions: 2 2 100.0%
Branches: 10 14 71.4%

Line Branch Exec Source
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
30 struct ogg_codec {
31 const int8_t *magic;
32 uint8_t magicsize;
33 const int8_t *name;
34 /**
35 * Attempt to process a packet as a header
36 * @return 1 if the packet was a valid header,
37 * 0 if the packet was not a header (was a data packet)
38 * -1 if an error occurred or for unsupported stream
39 */
40 int (*header)(AVFormatContext *, int);
41 int (*packet)(AVFormatContext *, int);
42 /**
43 * Translate a granule into a timestamp.
44 * Will set dts if non-null and known.
45 * @return pts
46 */
47 uint64_t (*gptopts)(AVFormatContext *, int, uint64_t, int64_t *dts);
48 /**
49 * 1 if granule is the start time of the associated packet.
50 * 0 if granule is the end time of the associated packet.
51 */
52 int granule_is_start;
53 /**
54 * Number of expected headers
55 */
56 int nb_header;
57 void (*cleanup)(AVFormatContext *s, int idx);
58 };
59
60 struct ogg_stream {
61 uint8_t *buf;
62 unsigned int bufsize;
63 unsigned int bufpos;
64 unsigned int pstart;
65 unsigned int psize;
66 unsigned int pflags;
67 unsigned int pduration;
68 uint32_t serial;
69 uint64_t granule;
70 uint64_t start_granule;
71 int64_t lastpts;
72 int64_t lastdts;
73 int64_t sync_pos; ///< file offset of the first page needed to reconstruct the current packet
74 int64_t page_pos; ///< file offset of the current page
75 int flags;
76 const struct ogg_codec *codec;
77 int header;
78 int nsegs, segp;
79 uint8_t segments[255];
80 int incomplete; ///< whether we're expecting a continuation in the next page
81 int page_end; ///< current packet is the last one completed in the page
82 int keyframe_seek;
83 int got_start;
84 int got_data; ///< 1 if the stream got some data (non-initial packets), 0 otherwise
85 int nb_header; ///< set to the number of parsed headers
86 int start_trimming; ///< set the number of packets to drop from the start
87 int end_trimming; ///< set the number of packets to drop from the end
88 uint8_t *new_metadata;
89 size_t 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 /**
133 * Parse Vorbis comments
134 *
135 * @note The buffer will be temporarily modifed by this function,
136 * so it needs to be writable. Furthermore it must be padded
137 * by a single byte (not counted in size).
138 * All changes will have been reverted upon return.
139 */
140 int ff_vorbis_comment(AVFormatContext *ms, AVDictionary **m,
141 const uint8_t *buf, int size, int parse_picture);
142
143 /**
144 * Parse Vorbis comments and add metadata to an AVStream
145 *
146 * @note The buffer will be temporarily modifed by this function,
147 * so it needs to be writable. Furthermore it must be padded
148 * by a single byte (not counted in size).
149 * All changes will have been reverted upon return.
150 */
151 int ff_vorbis_stream_comment(AVFormatContext *as, AVStream *st,
152 const uint8_t *buf, int size);
153
154 static inline int
155 1350 ogg_find_stream (struct ogg * ogg, int serial)
156 {
157 int i;
158
159
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1362 for (i = 0; i < ogg->nstreams; i++)
160
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1325 if (ogg->streams[i].serial == serial)
161 1313 return i;
162
163 37 return -1;
164 }
165
166 static inline uint64_t
167 962 ogg_gptopts (AVFormatContext * s, int i, uint64_t gp, int64_t *dts)
168 {
169 962 struct ogg *ogg = s->priv_data;
170 962 struct ogg_stream *os = ogg->streams + i;
171 962 uint64_t pts = AV_NOPTS_VALUE;
172
173
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962 if(os->codec && os->codec->gptopts){
174 43 pts = os->codec->gptopts(s, i, gp, dts);
175 } else {
176 919 pts = gp;
177
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919 if (dts)
178 545 *dts = pts;
179 }
180
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962 if (pts > INT64_MAX && pts != AV_NOPTS_VALUE) {
181 // The return type is unsigned, we thus cannot return negative pts
182 av_log(s, AV_LOG_ERROR, "invalid pts %"PRId64"\n", pts);
183 pts = AV_NOPTS_VALUE;
184 }
185
186 962 return pts;
187 }
188
189 #endif /* AVFORMAT_OGGDEC_H */
190