2 * Beam Software SIFF demuxer
3 * Copyright (c) 2007 Konstantin Shishkov
5 * This file is part of FFmpeg.
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.
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.
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
22 #include "libavutil/channel_layout.h"
23 #include "libavutil/intreadwrite.h"
26 #include "avio_internal.h"
29 TAG_SIFF = MKTAG('S', 'I', 'F', 'F'),
30 TAG_BODY = MKTAG('B', 'O', 'D', 'Y'),
31 TAG_VBHD = MKTAG('V', 'B', 'H', 'D'),
32 TAG_SHDR = MKTAG('S', 'H', 'D', 'R'),
33 TAG_VBV1 = MKTAG('V', 'B', 'V', '1'),
34 TAG_SOUN = MKTAG('S', 'O', 'U', 'N'),
41 VB_HAS_PALETTE = 0x10,
45 typedef struct SIFFContext{
64 static int siff_probe(AVProbeData *p)
66 uint32_t tag = AV_RL32(p->buf + 8);
67 /* check file header */
68 if (AV_RL32(p->buf) != TAG_SIFF ||
69 (tag != TAG_VBV1 && tag != TAG_SOUN))
71 return AVPROBE_SCORE_MAX;
74 static int create_audio_stream(AVFormatContext *s, SIFFContext *c)
77 ast = avformat_new_stream(s, NULL);
80 ast->codec->codec_type = AVMEDIA_TYPE_AUDIO;
81 ast->codec->codec_id = AV_CODEC_ID_PCM_U8;
82 ast->codec->channels = 1;
83 ast->codec->channel_layout = AV_CH_LAYOUT_MONO;
84 ast->codec->bits_per_coded_sample = 8;
85 ast->codec->sample_rate = c->rate;
86 avpriv_set_pts_info(ast, 16, 1, c->rate);
91 static int siff_parse_vbv1(AVFormatContext *s, SIFFContext *c, AVIOContext *pb)
96 if (avio_rl32(pb) != TAG_VBHD){
97 av_log(s, AV_LOG_ERROR, "Header chunk is missing\n");
100 if(avio_rb32(pb) != 32){
101 av_log(s, AV_LOG_ERROR, "Header chunk size is incorrect\n");
104 if(avio_rl16(pb) != 1){
105 av_log(s, AV_LOG_ERROR, "Incorrect header version\n");
108 width = avio_rl16(pb);
109 height = avio_rl16(pb);
111 c->frames = avio_rl16(pb);
113 av_log(s, AV_LOG_ERROR, "File contains no frames ???\n");
116 c->bits = avio_rl16(pb);
117 c->rate = avio_rl16(pb);
118 c->block_align = c->rate * (c->bits >> 3);
120 avio_skip(pb, 16); //zeroes
122 st = avformat_new_stream(s, NULL);
125 st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
126 st->codec->codec_id = AV_CODEC_ID_VB;
127 st->codec->codec_tag = MKTAG('V', 'B', 'V', '1');
128 st->codec->width = width;
129 st->codec->height = height;
130 st->codec->pix_fmt = AV_PIX_FMT_PAL8;
131 avpriv_set_pts_info(st, 16, 1, 12);
135 c->has_audio = !!c->rate;
137 if (c->has_audio && create_audio_stream(s, c) < 0)
142 static int siff_parse_soun(AVFormatContext *s, SIFFContext *c, AVIOContext *pb)
144 if (avio_rl32(pb) != TAG_SHDR){
145 av_log(s, AV_LOG_ERROR, "Header chunk is missing\n");
148 if(avio_rb32(pb) != 8){
149 av_log(s, AV_LOG_ERROR, "Header chunk size is incorrect\n");
152 avio_skip(pb, 4); //unknown value
153 c->rate = avio_rl16(pb);
154 c->bits = avio_rl16(pb);
155 c->block_align = c->rate * (c->bits >> 3);
156 return create_audio_stream(s, c);
159 static int siff_read_header(AVFormatContext *s)
161 AVIOContext *pb = s->pb;
162 SIFFContext *c = s->priv_data;
165 if (avio_rl32(pb) != TAG_SIFF)
167 avio_skip(pb, 4); //ignore size
170 if (tag != TAG_VBV1 && tag != TAG_SOUN){
171 av_log(s, AV_LOG_ERROR, "Not a VBV file\n");
175 if (tag == TAG_VBV1 && siff_parse_vbv1(s, c, pb) < 0)
177 if (tag == TAG_SOUN && siff_parse_soun(s, c, pb) < 0)
179 if (avio_rl32(pb) != MKTAG('B', 'O', 'D', 'Y')){
180 av_log(s, AV_LOG_ERROR, "'BODY' chunk is missing\n");
183 avio_skip(pb, 4); //ignore size
188 static int siff_read_packet(AVFormatContext *s, AVPacket *pkt)
190 SIFFContext *c = s->priv_data;
194 if (c->cur_frame >= c->frames)
196 if (c->curstrm == -1){
197 c->pktsize = avio_rl32(s->pb) - 4;
198 c->flags = avio_rl16(s->pb);
199 c->gmcsize = (c->flags & VB_HAS_GMC) ? 4 : 0;
201 avio_read(s->pb, c->gmc, c->gmcsize);
202 c->sndsize = (c->flags & VB_HAS_AUDIO) ? avio_rl32(s->pb): 0;
203 c->curstrm = !!(c->flags & VB_HAS_AUDIO);
207 size = c->pktsize - c->sndsize - c->gmcsize - 2;
208 size = ffio_limit(s->pb, size);
209 if(size < 0 || c->pktsize < c->sndsize)
210 return AVERROR_INVALIDDATA;
211 if (av_new_packet(pkt, size + c->gmcsize + 2) < 0)
212 return AVERROR(ENOMEM);
213 AV_WL16(pkt->data, c->flags);
215 memcpy(pkt->data + 2, c->gmc, c->gmcsize);
216 avio_read(s->pb, pkt->data + 2 + c->gmcsize, size);
217 pkt->stream_index = 0;
220 if ((size = av_get_packet(s->pb, pkt, c->sndsize - 4)) < 0)
222 pkt->stream_index = 1;
223 pkt->duration = size;
226 if(!c->cur_frame || c->curstrm)
227 pkt->flags |= AV_PKT_FLAG_KEY;
228 if (c->curstrm == -1)
231 size = av_get_packet(s->pb, pkt, c->block_align);
234 pkt->duration = size;
239 AVInputFormat ff_siff_demuxer = {
241 .long_name = NULL_IF_CONFIG_SMALL("Beam Software SIFF"),
242 .priv_data_size = sizeof(SIFFContext),
243 .read_probe = siff_probe,
244 .read_header = siff_read_header,
245 .read_packet = siff_read_packet,
246 .extensions = "vb,son",