FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavformat/oggparseflac.c
Date: 2025-10-26 07:25:09
Exec Total Coverage
Lines: 41 77 53.2%
Functions: 2 3 66.7%
Branches: 17 34 50.0%
Line Branch Exec Source
1 /*
2 * Copyright (C) 2005 Matthieu CASTET
3 *
4 * This file is part of FFmpeg.
5 *
6 * FFmpeg is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
10 *
11 * FFmpeg is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with FFmpeg; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19 */
20
21 #include <stdlib.h>
22 #include "libavcodec/avcodec.h"
23 #include "libavcodec/bytestream.h"
24 #include "libavcodec/flac.h"
25 #include "avformat.h"
26 #include "internal.h"
27 #include "oggdec.h"
28
29 #define OGG_FLAC_METADATA_TYPE_STREAMINFO 0x7F
30 #define OGG_FLAC_MAGIC "\177FLAC"
31 #define OGG_FLAC_MAGIC_SIZE sizeof(OGG_FLAC_MAGIC)-1
32
33 static int
34 9 flac_header (AVFormatContext * s, int idx)
35 {
36 9 struct ogg *ogg = s->priv_data;
37 9 struct ogg_stream *os = ogg->streams + idx;
38 9 AVStream *st = s->streams[idx];
39 GetByteContext gb;
40 int mdt, ret;
41
42
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 9 if (os->buf[os->pstart] == 0xff)
43 3 return 0;
44
45 6 bytestream2_init(&gb, os->buf + os->pstart, os->psize);
46 6 mdt = bytestream2_get_byte(&gb) & 0x7F;
47
48
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 6 if (mdt == OGG_FLAC_METADATA_TYPE_STREAMINFO) {
49 uint32_t samplerate;
50
51
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 3 if (bytestream2_get_bytes_left(&gb) < 4 + 4 + 4 + 4 + FLAC_STREAMINFO_SIZE)
52 ✗ return AVERROR_INVALIDDATA;
53 3 bytestream2_skipu(&gb, 4); /* "FLAC" */
54
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 3 if (bytestream2_get_byteu(&gb) != 1) /* unsupported major version */
55 ✗ return -1;
56 3 bytestream2_skipu(&gb, 1 + 2); /* minor version + header count */
57 3 bytestream2_skipu(&gb, 4); /* "fLaC" */
58
59 /* METADATA_BLOCK_HEADER */
60
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 3 if (bytestream2_get_be32u(&gb) != FLAC_STREAMINFO_SIZE)
61 ✗ return -1;
62
63 3 st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
64 3 st->codecpar->codec_id = AV_CODEC_ID_FLAC;
65 3 ffstream(st)->need_parsing = AVSTREAM_PARSE_HEADERS;
66
67
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 3 if ((ret = ff_alloc_extradata(st->codecpar, FLAC_STREAMINFO_SIZE)) < 0)
68 ✗ return ret;
69 3 bytestream2_get_bufferu(&gb, st->codecpar->extradata, FLAC_STREAMINFO_SIZE);
70
71 3 samplerate = AV_RB24(st->codecpar->extradata + 10) >> 4;
72
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 3 if (!samplerate)
73 ✗ return AVERROR_INVALIDDATA;
74
75 3 avpriv_set_pts_info(st, 64, 1, samplerate);
76
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 3 } else if (mdt == FLAC_METADATA_TYPE_VORBIS_COMMENT) {
77 3 ff_vorbis_stream_comment(s, st, os->buf + os->pstart + 4, os->psize - 4);
78 }
79
80 6 return 1;
81 }
82
83 static int
84 108 flac_packet (AVFormatContext * s, int idx)
85 {
86 108 struct ogg *ogg = s->priv_data;
87 108 struct ogg_stream *os = ogg->streams + idx;
88 108 AVStream *st = s->streams[idx];
89 int ret;
90
91
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 108 if (os->psize > OGG_FLAC_MAGIC_SIZE &&
92 108 !memcmp(
93
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 108 os->buf + os->pstart,
94 OGG_FLAC_MAGIC,
95 OGG_FLAC_MAGIC_SIZE))
96 19 return 1;
97
98
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 89 if (os->psize > 0 &&
99
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 89 ((os->buf[os->pstart] & 0x7F) == FLAC_METADATA_TYPE_VORBIS_COMMENT)) {
100 19 ret = ff_vorbis_update_metadata(s, st, os->buf + os->pstart + 4,
101 19 os->psize - 4);
102
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 19 if (ret < 0)
103 ✗ return ret;
104
105 19 return 1;
106 }
107
108 70 return 0;
109 }
110
111 static int
112 ✗ old_flac_header (AVFormatContext * s, int idx)
113 {
114 ✗ struct ogg *ogg = s->priv_data;
115 ✗ AVStream *st = s->streams[idx];
116 ✗ struct ogg_stream *os = ogg->streams + idx;
117 ✗ AVCodecParserContext *parser = av_parser_init(AV_CODEC_ID_FLAC);
118 AVCodecContext *avctx;
119 int size, ret;
120 uint8_t *data;
121
122 ✗ if (!parser)
123 ✗ return -1;
124
125 ✗ st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
126 ✗ st->codecpar->codec_id = AV_CODEC_ID_FLAC;
127
128 ✗ avctx = avcodec_alloc_context3(NULL);
129 ✗ if (!avctx) {
130 ✗ ret = AVERROR(ENOMEM);
131 ✗ goto fail;
132 }
133
134 ✗ ret = avcodec_parameters_to_context(avctx, st->codecpar);
135 ✗ if (ret < 0)
136 ✗ goto fail;
137
138 ✗ parser->flags = PARSER_FLAG_COMPLETE_FRAMES;
139 ✗ av_parser_parse2(parser, avctx,
140 ✗ &data, &size, os->buf + os->pstart, os->psize,
141 AV_NOPTS_VALUE, AV_NOPTS_VALUE, -1);
142
143 ✗ av_parser_close(parser);
144
145 ✗ if (avctx->sample_rate) {
146 ✗ avpriv_set_pts_info(st, 64, 1, avctx->sample_rate);
147 ✗ avcodec_free_context(&avctx);
148 ✗ return 0;
149 }
150
151 ✗ avcodec_free_context(&avctx);
152 ✗ return 1;
153 ✗ fail:
154 ✗ av_parser_close(parser);
155 ✗ avcodec_free_context(&avctx);
156 ✗ return ret;
157 }
158
159 const struct ogg_codec ff_flac_codec = {
160 .magic = OGG_FLAC_MAGIC,
161 .magicsize = OGG_FLAC_MAGIC_SIZE,
162 .header = flac_header,
163 .nb_header = 2,
164 .packet = flac_packet,
165 };
166
167 const struct ogg_codec ff_old_flac_codec = {
168 .magic = "fLaC",
169 .magicsize = 4,
170 .header = old_flac_header,
171 .nb_header = 0,
172 };
173