FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavformat/oggdec.h
Date: 2025-10-10 03:51:19
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 /**
42 * Attempt to process a packet as a data packet
43 * @return < 0 (AVERROR) code or -1 on error
44 * == 0 if the packet was a regular data packet.
45 * == 1 if the packet was a header from a chained bitstream.
46 * This will cause the packet to be skipped in calling code (ogg_packet()
47 */
48 int (*packet)(AVFormatContext *, int);
49 /**
50 * Translate a granule into a timestamp.
51 * Will set dts if non-null and known.
52 * @return pts
53 */
54 uint64_t (*gptopts)(AVFormatContext *, int, uint64_t, int64_t *dts);
55 /**
56 * 1 if granule is the start time of the associated packet.
57 * 0 if granule is the end time of the associated packet.
58 */
59 int granule_is_start;
60 /**
61 * Number of expected headers
62 */
63 int nb_header;
64 void (*cleanup)(AVFormatContext *s, int idx);
65 };
66
67 struct ogg_stream {
68 uint8_t *buf;
69 unsigned int bufsize;
70 unsigned int bufpos;
71 unsigned int pstart;
72 unsigned int psize;
73 unsigned int pflags;
74 unsigned int pduration;
75 uint32_t serial;
76 uint64_t granule;
77 uint64_t start_granule;
78 int64_t lastpts;
79 int64_t lastdts;
80 int64_t sync_pos; ///< file offset of the first page needed to reconstruct the current packet
81 int64_t page_pos; ///< file offset of the current page
82 int flags;
83 const struct ogg_codec *codec;
84 int header;
85 int nsegs, segp;
86 uint8_t segments[255];
87 int incomplete; ///< whether we're expecting a continuation in the next page
88 int page_end; ///< current packet is the last one completed in the page
89 int keyframe_seek;
90 int got_start;
91 int got_data; ///< 1 if the stream got some data (non-initial packets), 0 otherwise
92 int nb_header; ///< set to the number of parsed headers
93 int start_trimming; ///< set the number of packets to drop from the start
94 int end_trimming; ///< set the number of packets to drop from the end
95 uint8_t *new_metadata;
96 size_t new_metadata_size;
97 uint8_t *new_extradata;
98 size_t new_extradata_size;
99 void *private;
100 };
101
102 struct ogg_state {
103 uint64_t pos;
104 int curidx;
105 struct ogg_state *next;
106 int nstreams;
107 struct ogg_stream streams[1];
108 };
109
110 struct ogg {
111 struct ogg_stream *streams;
112 int nstreams;
113 int headers;
114 int curidx;
115 int64_t page_pos; ///< file offset of the current page
116 struct ogg_state *state;
117 };
118
119 #define OGG_FLAG_CONT 1
120 #define OGG_FLAG_BOS 2
121 #define OGG_FLAG_EOS 4
122
123 #define OGG_NOGRANULE_VALUE (-1ull)
124
125 extern const struct ogg_codec ff_celt_codec;
126 extern const struct ogg_codec ff_dirac_codec;
127 extern const struct ogg_codec ff_flac_codec;
128 extern const struct ogg_codec ff_ogm_audio_codec;
129 extern const struct ogg_codec ff_ogm_old_codec;
130 extern const struct ogg_codec ff_ogm_text_codec;
131 extern const struct ogg_codec ff_ogm_video_codec;
132 extern const struct ogg_codec ff_old_dirac_codec;
133 extern const struct ogg_codec ff_old_flac_codec;
134 extern const struct ogg_codec ff_opus_codec;
135 extern const struct ogg_codec ff_skeleton_codec;
136 extern const struct ogg_codec ff_speex_codec;
137 extern const struct ogg_codec ff_theora_codec;
138 extern const struct ogg_codec ff_vorbis_codec;
139 extern const struct ogg_codec ff_vp8_codec;
140
141 /**
142 * Parse Vorbis comments
143 *
144 * @note The buffer will be temporarily modified by this function,
145 * so it needs to be writable. Furthermore it must be padded
146 * by a single byte (not counted in size).
147 * All changes will have been reverted upon return.
148 */
149 int ff_vorbis_comment(AVFormatContext *ms, AVDictionary **m,
150 const uint8_t *buf, int size, int parse_picture);
151
152 /**
153 * Parse Vorbis comments and add metadata to an AVStream
154 *
155 * @note The buffer will be temporarily modified by this function,
156 * so it needs to be writable. Furthermore it must be padded
157 * by a single byte (not counted in size).
158 * All changes will have been reverted upon return.
159 */
160 int ff_vorbis_stream_comment(AVFormatContext *as, AVStream *st,
161 const uint8_t *buf, int size);
162
163 /**
164 * Parse Vorbis comments, add metadata to an AVStream
165 *
166 * This function also attaches the metadata to the next decoded
167 * packet as AV_PKT_DATA_STRINGS_METADATA
168 *
169 * @note The buffer will be temporarily modified by this function,
170 * so it needs to be writable. Furthermore it must be padded
171 * by a single byte (not counted in size).
172 * All changes will have been reverted upon return.
173 */
174 int ff_vorbis_update_metadata(AVFormatContext *s, AVStream *st,
175 const uint8_t *buf, int size);
176
177 static inline int
178 1551 ogg_find_stream (struct ogg * ogg, int serial)
179 {
180 int i;
181
182
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 1569 for (i = 0; i < ogg->nstreams; i++)
183
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 1521 if (ogg->streams[i].serial == serial)
184 1503 return i;
185
186 48 return -1;
187 }
188
189 static inline uint64_t
190 985 ogg_gptopts (AVFormatContext * s, int i, uint64_t gp, int64_t *dts)
191 {
192 985 struct ogg *ogg = s->priv_data;
193 985 struct ogg_stream *os = ogg->streams + i;
194 985 uint64_t pts = AV_NOPTS_VALUE;
195
196
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 985 if(os->codec && os->codec->gptopts){
197 90 pts = os->codec->gptopts(s, i, gp, dts);
198 } else {
199 895 pts = gp;
200
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 895 if (dts)
201 515 *dts = pts;
202 }
203
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 985 if (pts > INT64_MAX && pts != AV_NOPTS_VALUE) {
204 // The return type is unsigned, we thus cannot return negative pts
205 ✗ av_log(s, AV_LOG_ERROR, "invalid pts %"PRId64"\n", pts);
206 ✗ pts = AV_NOPTS_VALUE;
207 }
208
209 985 return pts;
210 }
211
212 #endif /* AVFORMAT_OGGDEC_H */
213