FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavformat/bmv.c
Date: 2026-04-24 19:58:39
Exec Total Coverage
Lines: 54 65 83.1%
Functions: 3 3 100.0%
Branches: 16 26 61.5%
Line Branch Exec Source
1 /*
2 * Discworld II BMV demuxer
3 * Copyright (c) 2011 Konstantin Shishkov
4 *
5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22 #include "libavutil/channel_layout.h"
23 #include "libavutil/mem.h"
24 #include "avformat.h"
25 #include "avio_internal.h"
26 #include "demux.h"
27 #include "internal.h"
28
29 enum BMVFlags {
30 BMV_NOP = 0,
31 BMV_END,
32 BMV_DELTA,
33 BMV_INTRA,
34
35 BMV_AUDIO = 0x20,
36 };
37
38 typedef struct BMVContext {
39 uint8_t *packet;
40 int size;
41 int get_next;
42 int64_t audio_pos;
43 } BMVContext;
44
45 2 static int bmv_read_header(AVFormatContext *s)
46 {
47 AVStream *st, *ast;
48 2 BMVContext *c = s->priv_data;
49
50 2 st = avformat_new_stream(s, 0);
51
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 2 if (!st)
52 ✗ return AVERROR(ENOMEM);
53 2 st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
54 2 st->codecpar->codec_id = AV_CODEC_ID_BMV_VIDEO;
55 2 st->codecpar->width = 640;
56 2 st->codecpar->height = 429;
57 2 st->codecpar->format = AV_PIX_FMT_PAL8;
58 2 avpriv_set_pts_info(st, 16, 1, 12);
59 2 ast = avformat_new_stream(s, 0);
60
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 2 if (!ast)
61 ✗ return AVERROR(ENOMEM);
62 2 ast->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
63 2 ast->codecpar->codec_id = AV_CODEC_ID_BMV_AUDIO;
64 2 ast->codecpar->ch_layout = (AVChannelLayout)AV_CHANNEL_LAYOUT_STEREO;
65 2 ast->codecpar->sample_rate = 22050;
66 2 avpriv_set_pts_info(ast, 16, 1, 22050);
67
68 2 c->get_next = 1;
69 2 c->audio_pos = 0;
70 2 return 0;
71 }
72
73 88 static int bmv_read_packet(AVFormatContext *s, AVPacket *pkt)
74 {
75 88 BMVContext *c = s->priv_data;
76 int type, err;
77
78
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 88 while (c->get_next) {
79
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 46 if (s->pb->eof_reached)
80 2 return AVERROR_EOF;
81 44 type = avio_r8(s->pb);
82
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 44 if (type == BMV_NOP)
83 ✗ continue;
84
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 44 if (type == BMV_END)
85 ✗ return AVERROR_EOF;
86 44 c->size = avio_rl24(s->pb);
87
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 44 if (!c->size)
88 ✗ return AVERROR_INVALIDDATA;
89
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 44 if ((err = av_reallocp(&c->packet, c->size + 1)) < 0)
90 ✗ return err;
91 44 c->packet[0] = type;
92
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 44 if ((err = ffio_read_size(s->pb, c->packet + 1, c->size)) < 0)
93 2 return err;
94
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 42 if (type & BMV_AUDIO) {
95 42 int audio_size = c->packet[1] * 65 + 1;
96
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 42 if (audio_size >= c->size) {
97 ✗ av_log(s, AV_LOG_ERROR, "Reported audio size %d is bigger than packet size (%d)\n",
98 audio_size, c->size);
99 ✗ return AVERROR_INVALIDDATA;
100 }
101
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 42 if ((err = av_new_packet(pkt, audio_size)) < 0)
102 ✗ return err;
103 42 memcpy(pkt->data, c->packet + 1, pkt->size);
104 42 pkt->stream_index = 1;
105 42 pkt->pts = c->audio_pos;
106 42 pkt->duration = c->packet[1] * 32;
107 42 c->audio_pos += pkt->duration;
108 42 c->get_next = 0;
109 42 return pkt->size;
110 } else
111 ✗ break;
112 }
113
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 42 if ((err = av_new_packet(pkt, c->size + 1)) < 0)
114 ✗ return err;
115 42 pkt->stream_index = 0;
116 42 c->get_next = 1;
117 42 memcpy(pkt->data, c->packet, pkt->size);
118 42 return pkt->size;
119 }
120
121 2 static int bmv_read_close(AVFormatContext *s)
122 {
123 2 BMVContext *c = s->priv_data;
124
125 2 av_freep(&c->packet);
126
127 2 return 0;
128 }
129
130 const FFInputFormat ff_bmv_demuxer = {
131 .p.name = "bmv",
132 .p.long_name = NULL_IF_CONFIG_SMALL("Discworld II BMV"),
133 .p.extensions = "bmv",
134 .priv_data_size = sizeof(BMVContext),
135 .read_header = bmv_read_header,
136 .read_packet = bmv_read_packet,
137 .read_close = bmv_read_close,
138 };
139