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path: root/libavformat/siff.c (plain)
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1/*
2 * Beam Software SIFF demuxer
3 * Copyright (c) 2007 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/intreadwrite.h"
24
25#include "avformat.h"
26#include "internal.h"
27#include "avio_internal.h"
28
29enum SIFFTags {
30 TAG_SIFF = MKTAG('S', 'I', 'F', 'F'),
31 TAG_BODY = MKTAG('B', 'O', 'D', 'Y'),
32 TAG_VBHD = MKTAG('V', 'B', 'H', 'D'),
33 TAG_SHDR = MKTAG('S', 'H', 'D', 'R'),
34 TAG_VBV1 = MKTAG('V', 'B', 'V', '1'),
35 TAG_SOUN = MKTAG('S', 'O', 'U', 'N'),
36};
37
38enum VBFlags {
39 VB_HAS_GMC = 0x01,
40 VB_HAS_AUDIO = 0x04,
41 VB_HAS_VIDEO = 0x08,
42 VB_HAS_PALETTE = 0x10,
43 VB_HAS_LENGTH = 0x20
44};
45
46typedef struct SIFFContext {
47 int frames;
48 int cur_frame;
49 int rate;
50 int bits;
51 int block_align;
52
53 int has_video;
54 int has_audio;
55
56 int curstrm;
57 unsigned int pktsize;
58 int gmcsize;
59 unsigned int sndsize;
60
61 unsigned int flags;
62 uint8_t gmc[4];
63} SIFFContext;
64
65static int siff_probe(AVProbeData *p)
66{
67 uint32_t tag = AV_RL32(p->buf + 8);
68 /* check file header */
69 if (AV_RL32(p->buf) != TAG_SIFF ||
70 (tag != TAG_VBV1 && tag != TAG_SOUN))
71 return 0;
72 return AVPROBE_SCORE_MAX;
73}
74
75static int create_audio_stream(AVFormatContext *s, SIFFContext *c)
76{
77 AVStream *ast;
78 ast = avformat_new_stream(s, NULL);
79 if (!ast)
80 return AVERROR(ENOMEM);
81 ast->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
82 ast->codecpar->codec_id = AV_CODEC_ID_PCM_U8;
83 ast->codecpar->channels = 1;
84 ast->codecpar->channel_layout = AV_CH_LAYOUT_MONO;
85 ast->codecpar->bits_per_coded_sample = 8;
86 ast->codecpar->sample_rate = c->rate;
87 avpriv_set_pts_info(ast, 16, 1, c->rate);
88 ast->start_time = 0;
89 return 0;
90}
91
92static int siff_parse_vbv1(AVFormatContext *s, SIFFContext *c, AVIOContext *pb)
93{
94 AVStream *st;
95 int width, height;
96
97 if (avio_rl32(pb) != TAG_VBHD) {
98 av_log(s, AV_LOG_ERROR, "Header chunk is missing\n");
99 return AVERROR_INVALIDDATA;
100 }
101 if (avio_rb32(pb) != 32) {
102 av_log(s, AV_LOG_ERROR, "Header chunk size is incorrect\n");
103 return AVERROR_INVALIDDATA;
104 }
105 if (avio_rl16(pb) != 1) {
106 av_log(s, AV_LOG_ERROR, "Incorrect header version\n");
107 return AVERROR_INVALIDDATA;
108 }
109 width = avio_rl16(pb);
110 height = avio_rl16(pb);
111 avio_skip(pb, 4);
112 c->frames = avio_rl16(pb);
113 if (!c->frames) {
114 av_log(s, AV_LOG_ERROR, "File contains no frames ???\n");
115 return AVERROR_INVALIDDATA;
116 }
117 c->bits = avio_rl16(pb);
118 c->rate = avio_rl16(pb);
119 c->block_align = c->rate * (c->bits >> 3);
120
121 avio_skip(pb, 16); // zeroes
122
123 st = avformat_new_stream(s, NULL);
124 if (!st)
125 return AVERROR(ENOMEM);
126 st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
127 st->codecpar->codec_id = AV_CODEC_ID_VB;
128 st->codecpar->codec_tag = MKTAG('V', 'B', 'V', '1');
129 st->codecpar->width = width;
130 st->codecpar->height = height;
131 st->codecpar->format = AV_PIX_FMT_PAL8;
132 st->nb_frames =
133 st->duration = c->frames;
134 avpriv_set_pts_info(st, 16, 1, 12);
135
136 c->cur_frame = 0;
137 c->has_video = 1;
138 c->has_audio = !!c->rate;
139 c->curstrm = -1;
140 if (c->has_audio)
141 return create_audio_stream(s, c);
142 return 0;
143}
144
145static int siff_parse_soun(AVFormatContext *s, SIFFContext *c, AVIOContext *pb)
146{
147 if (avio_rl32(pb) != TAG_SHDR) {
148 av_log(s, AV_LOG_ERROR, "Header chunk is missing\n");
149 return AVERROR_INVALIDDATA;
150 }
151 if (avio_rb32(pb) != 8) {
152 av_log(s, AV_LOG_ERROR, "Header chunk size is incorrect\n");
153 return AVERROR_INVALIDDATA;
154 }
155 avio_skip(pb, 4); // unknown value
156 c->rate = avio_rl16(pb);
157 c->bits = avio_rl16(pb);
158 c->block_align = c->rate * (c->bits >> 3);
159 return create_audio_stream(s, c);
160}
161
162static int siff_read_header(AVFormatContext *s)
163{
164 AVIOContext *pb = s->pb;
165 SIFFContext *c = s->priv_data;
166 uint32_t tag;
167 int ret;
168
169 if (avio_rl32(pb) != TAG_SIFF)
170 return AVERROR_INVALIDDATA;
171 avio_skip(pb, 4); // ignore size
172 tag = avio_rl32(pb);
173
174 if (tag != TAG_VBV1 && tag != TAG_SOUN) {
175 av_log(s, AV_LOG_ERROR, "Not a VBV file\n");
176 return AVERROR_INVALIDDATA;
177 }
178
179 if (tag == TAG_VBV1 && (ret = siff_parse_vbv1(s, c, pb)) < 0)
180 return ret;
181 if (tag == TAG_SOUN && (ret = siff_parse_soun(s, c, pb)) < 0)
182 return ret;
183 if (avio_rl32(pb) != MKTAG('B', 'O', 'D', 'Y')) {
184 av_log(s, AV_LOG_ERROR, "'BODY' chunk is missing\n");
185 return AVERROR_INVALIDDATA;
186 }
187 avio_skip(pb, 4); // ignore size
188
189 return 0;
190}
191
192static int siff_read_packet(AVFormatContext *s, AVPacket *pkt)
193{
194 SIFFContext *c = s->priv_data;
195
196 if (c->has_video) {
197 unsigned int size;
198 if (c->cur_frame >= c->frames)
199 return AVERROR_EOF;
200 if (c->curstrm == -1) {
201 c->pktsize = avio_rl32(s->pb) - 4;
202 c->flags = avio_rl16(s->pb);
203 c->gmcsize = (c->flags & VB_HAS_GMC) ? 4 : 0;
204 if (c->gmcsize)
205 avio_read(s->pb, c->gmc, c->gmcsize);
206 c->sndsize = (c->flags & VB_HAS_AUDIO) ? avio_rl32(s->pb) : 0;
207 c->curstrm = !!(c->flags & VB_HAS_AUDIO);
208 }
209
210 if (!c->curstrm) {
211 if (c->pktsize < 2LL + c->sndsize + c->gmcsize)
212 return AVERROR_INVALIDDATA;
213
214 size = c->pktsize - c->sndsize - c->gmcsize - 2;
215 size = ffio_limit(s->pb, size);
216 if (av_new_packet(pkt, size + c->gmcsize + 2) < 0)
217 return AVERROR(ENOMEM);
218 AV_WL16(pkt->data, c->flags);
219 if (c->gmcsize)
220 memcpy(pkt->data + 2, c->gmc, c->gmcsize);
221 if (avio_read(s->pb, pkt->data + 2 + c->gmcsize, size) != size) {
222 av_packet_unref(pkt);
223 return AVERROR_INVALIDDATA;
224 }
225 pkt->stream_index = 0;
226 c->curstrm = -1;
227 } else {
228 int pktsize = av_get_packet(s->pb, pkt, c->sndsize - 4);
229 if (pktsize < 0)
230 return AVERROR(EIO);
231 pkt->stream_index = 1;
232 pkt->duration = pktsize;
233 c->curstrm = 0;
234 }
235 if (!c->cur_frame || c->curstrm)
236 pkt->flags |= AV_PKT_FLAG_KEY;
237 if (c->curstrm == -1)
238 c->cur_frame++;
239 } else {
240 int pktsize = av_get_packet(s->pb, pkt, c->block_align);
241 if (!pktsize)
242 return AVERROR_EOF;
243 if (pktsize <= 0)
244 return AVERROR(EIO);
245 pkt->duration = pktsize;
246 }
247 return pkt->size;
248}
249
250AVInputFormat ff_siff_demuxer = {
251 .name = "siff",
252 .long_name = NULL_IF_CONFIG_SMALL("Beam Software SIFF"),
253 .priv_data_size = sizeof(SIFFContext),
254 .read_probe = siff_probe,
255 .read_header = siff_read_header,
256 .read_packet = siff_read_packet,
257 .extensions = "vb,son",
258};
259
generated by cgit at 2024-05-17 03:20:57 (GMT)