FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavformat/rawdec.c
Date: 2024-11-20 23:03:26
Exec Total Coverage
Lines: 68 95 71.6%
Functions: 4 6 66.7%
Branches: 30 47 63.8%
Line Branch Exec Source
1 /*
2 * RAW demuxers
3 * Copyright (c) 2001 Fabrice Bellard
4 * Copyright (c) 2005 Alex Beregszaszi
5 *
6 * This file is part of FFmpeg.
7 *
8 * FFmpeg is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; either
11 * version 2.1 of the License, or (at your option) any later version.
12 *
13 * FFmpeg is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Lesser General Public License for more details.
17 *
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with FFmpeg; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21 */
22
23 #include "config_components.h"
24
25 #include "avformat.h"
26 #include "demux.h"
27 #include "internal.h"
28 #include "rawdec.h"
29 #include "libavutil/opt.h"
30
31 #define RAW_PACKET_SIZE 1024
32
33 541602 int ff_raw_read_partial_packet(AVFormatContext *s, AVPacket *pkt)
34 {
35 541602 FFRawDemuxerContext *raw = s->priv_data;
36 int ret, size;
37
38 541602 size = raw->raw_packet_size;
39
40
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 541602 if ((ret = av_new_packet(pkt, size)) < 0)
41 ✗ return ret;
42
43 541602 pkt->pos= avio_tell(s->pb);
44 541602 pkt->stream_index = 0;
45 541602 ret = avio_read_partial(s->pb, pkt->data, size);
46
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 541602 if (ret < 0) {
47 1825 av_packet_unref(pkt);
48 1825 return ret;
49 }
50 539777 av_shrink_packet(pkt, ret);
51 539777 return ret;
52 }
53
54 42 int ff_raw_audio_read_header(AVFormatContext *s)
55 {
56 42 AVStream *st = avformat_new_stream(s, NULL);
57
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 42 if (!st)
58 ✗ return AVERROR(ENOMEM);
59 42 st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
60 42 st->codecpar->codec_id = ffifmt(s->iformat)->raw_codec_id;
61 42 ffstream(st)->need_parsing = AVSTREAM_PARSE_FULL_RAW;
62 42 st->start_time = 0;
63 /* the parameters will be extracted from the compressed bitstream */
64
65 42 return 0;
66 }
67
68 /* MPEG-1/H.263 input */
69 602 int ff_raw_video_read_header(AVFormatContext *s)
70 {
71 AVStream *st;
72 FFStream *sti;
73 602 FFRawVideoDemuxerContext *s1 = s->priv_data;
74 602 int ret = 0;
75
76
77 602 st = avformat_new_stream(s, NULL);
78
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 602 if (!st) {
79 ✗ ret = AVERROR(ENOMEM);
80 ✗ goto fail;
81 }
82 602 sti = ffstream(st);
83
84 602 st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
85 602 st->codecpar->codec_id = ffifmt(s->iformat)->raw_codec_id;
86 602 sti->need_parsing = AVSTREAM_PARSE_FULL_RAW;
87
88 602 st->avg_frame_rate = s1->framerate;
89 602 avpriv_set_pts_info(st, 64, 1, 1200000);
90
91 602 fail:
92 602 return ret;
93 }
94
95 ✗ int ff_raw_subtitle_read_header(AVFormatContext *s)
96 {
97 ✗ AVStream *st = avformat_new_stream(s, NULL);
98 ✗ if (!st)
99 ✗ return AVERROR(ENOMEM);
100 ✗ st->codecpar->codec_type = AVMEDIA_TYPE_SUBTITLE;
101 ✗ st->codecpar->codec_id = ffifmt(s->iformat)->raw_codec_id;
102 ✗ st->start_time = 0;
103 ✗ return 0;
104 }
105
106 ✗ static int raw_data_read_header(AVFormatContext *s)
107 {
108 ✗ AVStream *st = avformat_new_stream(s, NULL);
109 ✗ if (!st)
110 ✗ return AVERROR(ENOMEM);
111 ✗ st->codecpar->codec_type = AVMEDIA_TYPE_DATA;
112 ✗ st->codecpar->codec_id = ffifmt(s->iformat)->raw_codec_id;
113 ✗ st->start_time = 0;
114 ✗ return 0;
115 }
116
117 /* Note: Do not forget to add new entries to the Makefile as well. */
118
119 #define OFFSET(x) offsetof(FFRawVideoDemuxerContext, x)
120 #define DEC AV_OPT_FLAG_DECODING_PARAM
121 static const AVOption rawvideo_options[] = {
122 { "framerate", "", OFFSET(framerate), AV_OPT_TYPE_VIDEO_RATE, {.str = "25"}, 0, INT_MAX, DEC},
123 { "raw_packet_size", "", OFFSET(raw_packet_size), AV_OPT_TYPE_INT, {.i64 = RAW_PACKET_SIZE }, 1, INT_MAX, DEC},
124 { NULL },
125 };
126 #undef OFFSET
127
128 const AVClass ff_rawvideo_demuxer_class = {
129 .class_name = "generic raw video demuxer",
130 .item_name = av_default_item_name,
131 .option = rawvideo_options,
132 .version = LIBAVUTIL_VERSION_INT,
133 };
134
135 #define OFFSET(x) offsetof(FFRawDemuxerContext, x)
136 static const AVOption raw_options[] = {
137 { "raw_packet_size", "", OFFSET(raw_packet_size), AV_OPT_TYPE_INT, {.i64 = RAW_PACKET_SIZE }, 1, INT_MAX, DEC},
138 { NULL },
139 };
140
141 const AVClass ff_raw_demuxer_class = {
142 .class_name = "generic raw demuxer",
143 .item_name = av_default_item_name,
144 .option = raw_options,
145 .version = LIBAVUTIL_VERSION_INT,
146 };
147
148 #if CONFIG_DATA_DEMUXER
149 const FFInputFormat ff_data_demuxer = {
150 .p.name = "data",
151 .p.long_name = NULL_IF_CONFIG_SMALL("raw data"),
152 .p.flags = AVFMT_NOTIMESTAMPS,
153 .p.priv_class = &ff_raw_demuxer_class,
154 .read_header = raw_data_read_header,
155 .read_packet = ff_raw_read_partial_packet,
156 .raw_codec_id = AV_CODEC_ID_NONE,
157 .priv_data_size = sizeof(FFRawDemuxerContext),\
158 };
159 #endif
160
161 #if CONFIG_MJPEG_DEMUXER
162 7186 static int mjpeg_probe(const AVProbeData *p)
163 {
164 int i;
165 7186 int state = -1;
166 7186 int nb_invalid = 0;
167 7186 int nb_frames = 0;
168
169
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 375762731 for (i = 0; i < p->buf_size - 1; i++) {
170 int c;
171
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 375755545 if (p->buf[i] != 0xFF)
172 369262854 continue;
173 6492691 c = p->buf[i+1];
174
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 6492691 switch (c) {
175 98080 case 0xD8:
176 98080 state = 0xD8;
177 98080 break;
178 193377 case 0xC0:
179 case 0xC1:
180 case 0xC2:
181 case 0xC3:
182 case 0xC5:
183 case 0xC6:
184 case 0xC7:
185 case 0xF7:
186
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 193377 if (state == 0xD8) {
187 40708 state = 0xC0;
188 } else
189 152669 nb_invalid++;
190 193377 break;
191 41963 case 0xDA:
192
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 41963 if (state == 0xC0) {
193 13356 state = 0xDA;
194 } else
195 28607 nb_invalid++;
196 41963 break;
197 46039 case 0xD9:
198
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 46039 if (state == 0xDA) {
199 5359 state = 0xD9;
200 5359 nb_frames++;
201 } else
202 40680 nb_invalid++;
203 46039 break;
204 6113232 default:
205
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 6113232 if ( (c >= 0x02 && c <= 0xBF)
206
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 2582159 || c == 0xC8) {
207 3553718 nb_invalid++;
208 }
209 }
210 }
211
212
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 7186 if (nb_invalid*4 + 1 < nb_frames) {
213 static const char ct_jpeg[] = "\r\nContent-Type: image/jpeg\r\n";
214 int i;
215
216 ✗ for (i=0; i<FFMIN(p->buf_size - (int)sizeof(ct_jpeg), 100); i++)
217 ✗ if (!memcmp(p->buf + i, ct_jpeg, sizeof(ct_jpeg) - 1))
218 ✗ return AVPROBE_SCORE_EXTENSION;
219
220 ✗ if (nb_invalid == 0 && nb_frames > 2)
221 ✗ return AVPROBE_SCORE_EXTENSION / 2;
222 ✗ return AVPROBE_SCORE_EXTENSION / 4;
223 }
224
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 7186 if (!nb_invalid && nb_frames)
225 ✗ return AVPROBE_SCORE_EXTENSION / 4;
226
227 7186 return 0;
228 }
229
230 FF_DEF_RAWVIDEO_DEMUXER2(mjpeg, "raw MJPEG video", mjpeg_probe, "mjpg,mjpeg,mpo", AV_CODEC_ID_MJPEG, AVFMT_GENERIC_INDEX|AVFMT_NOTIMESTAMPS)
231 #endif
232