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
25 TAG_SIFF = MKTAG('S', 'I', 'F', 'F'),
26 TAG_BODY = MKTAG('B', 'O', 'D', 'Y'),
27 TAG_VBHD = MKTAG('V', 'B', 'H', 'D'),
28 TAG_SHDR = MKTAG('S', 'H', 'D', 'R'),
29 TAG_VBV1 = MKTAG('V', 'B', 'V', '1'),
30 TAG_SOUN = MKTAG('S', 'O', 'U', 'N'),
37 VB_HAS_PALETTE = 0x10,
41 typedef struct SIFFContext{
60 static int siff_probe(AVProbeData *p)
62 /* check file header */
63 if (AV_RL32(p->buf) == TAG_SIFF)
64 return AVPROBE_SCORE_MAX;
69 static int create_audio_stream(AVFormatContext *s, SIFFContext *c)
72 ast = av_new_stream(s, 0);
75 ast->codec->codec_type = CODEC_TYPE_AUDIO;
76 ast->codec->codec_id = CODEC_ID_PCM_U8;
77 ast->codec->channels = 1;
78 ast->codec->bits_per_sample = c->bits;
79 ast->codec->sample_rate = c->rate;
80 ast->codec->frame_size = c->block_align;
81 av_set_pts_info(ast, 16, 1, c->rate);
85 static int siff_parse_vbv1(AVFormatContext *s, SIFFContext *c, ByteIOContext *pb)
90 if (get_le32(pb) != TAG_VBHD){
91 av_log(s, AV_LOG_ERROR, "Header chunk is missing\n");
94 if(get_be32(pb) != 32){
95 av_log(s, AV_LOG_ERROR, "Header chunk size is incorrect\n");
98 if(get_le16(pb) != 1){
99 av_log(s, AV_LOG_ERROR, "Incorrect header version\n");
102 width = get_le16(pb);
103 height = get_le16(pb);
105 c->frames = get_le16(pb);
107 av_log(s, AV_LOG_ERROR, "File contains no frames ???\n");
110 c->bits = get_le16(pb);
111 c->rate = get_le16(pb);
112 c->block_align = c->rate * (c->bits >> 3);
114 url_fskip(pb, 16); //zeroes
116 st = av_new_stream(s, 0);
119 st->codec->codec_type = CODEC_TYPE_VIDEO;
120 st->codec->codec_id = CODEC_ID_VB;
121 st->codec->codec_tag = MKTAG('V', 'B', 'V', '1');
122 st->codec->width = width;
123 st->codec->height = height;
124 st->codec->pix_fmt = PIX_FMT_PAL8;
125 av_set_pts_info(st, 16, 1, 12);
129 c->has_audio = !!c->rate;
131 if (c->has_audio && create_audio_stream(s, c) < 0)
136 static int siff_parse_soun(AVFormatContext *s, SIFFContext *c, ByteIOContext *pb)
138 if (get_le32(pb) != TAG_SHDR){
139 av_log(s, AV_LOG_ERROR, "Header chunk is missing\n");
142 if(get_be32(pb) != 8){
143 av_log(s, AV_LOG_ERROR, "Header chunk size is incorrect\n");
146 url_fskip(pb, 4); //unknown value
147 c->rate = get_le16(pb);
148 c->bits = get_le16(pb);
149 c->block_align = c->rate * (c->bits >> 3);
150 return create_audio_stream(s, c);
153 static int siff_read_header(AVFormatContext *s, AVFormatParameters *ap)
155 ByteIOContext *pb = s->pb;
156 SIFFContext *c = s->priv_data;
159 if (get_le32(pb) != TAG_SIFF)
161 url_fskip(pb, 4); //ignore size
164 if (tag != TAG_VBV1 && tag != TAG_SOUN){
165 av_log(s, AV_LOG_ERROR, "Not a VBV file\n");
169 if (tag == TAG_VBV1 && siff_parse_vbv1(s, c, pb) < 0)
171 if (tag == TAG_SOUN && siff_parse_soun(s, c, pb) < 0)
173 if (get_le32(pb) != MKTAG('B', 'O', 'D', 'Y')){
174 av_log(s, AV_LOG_ERROR, "'BODY' chunk is missing\n");
177 url_fskip(pb, 4); //ignore size
182 static int siff_read_packet(AVFormatContext *s, AVPacket *pkt)
184 SIFFContext *c = s->priv_data;
188 if (c->cur_frame >= c->frames)
190 if (c->curstrm == -1){
191 c->pktsize = get_le32(s->pb) - 4;
192 c->flags = get_le16(s->pb);
193 c->gmcsize = (c->flags & VB_HAS_GMC) ? 4 : 0;
195 get_buffer(s->pb, c->gmc, c->gmcsize);
196 c->sndsize = (c->flags & VB_HAS_AUDIO) ? get_le32(s->pb): 0;
197 c->curstrm = !!(c->flags & VB_HAS_AUDIO);
201 size = c->pktsize - c->sndsize;
202 if (av_new_packet(pkt, size) < 0)
203 return AVERROR(ENOMEM);
204 AV_WL16(pkt->data, c->flags);
206 memcpy(pkt->data + 2, c->gmc, c->gmcsize);
207 get_buffer(s->pb, pkt->data + 2 + c->gmcsize, size - c->gmcsize - 2);
208 pkt->stream_index = 0;
211 if (av_get_packet(s->pb, pkt, c->sndsize - 4) < 0)
213 pkt->stream_index = 1;
216 if(!c->cur_frame || c->curstrm)
217 pkt->flags |= PKT_FLAG_KEY;
218 if (c->curstrm == -1)
221 size = av_get_packet(s->pb, pkt, c->block_align);
228 AVInputFormat siff_demuxer = {
230 "Beam Software SIFF",
235 .extensions = "vb,son"