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/intreadwrite.h"
26 TAG_SIFF = MKTAG('S', 'I', 'F', 'F'),
27 TAG_BODY = MKTAG('B', 'O', 'D', 'Y'),
28 TAG_VBHD = MKTAG('V', 'B', 'H', 'D'),
29 TAG_SHDR = MKTAG('S', 'H', 'D', 'R'),
30 TAG_VBV1 = MKTAG('V', 'B', 'V', '1'),
31 TAG_SOUN = MKTAG('S', 'O', 'U', 'N'),
38 VB_HAS_PALETTE = 0x10,
42 typedef struct SIFFContext{
61 static int siff_probe(AVProbeData *p)
63 uint32_t tag = AV_RL32(p->buf + 8);
64 /* check file header */
65 if (AV_RL32(p->buf) != TAG_SIFF ||
66 (tag != TAG_VBV1 && tag != TAG_SOUN))
68 return AVPROBE_SCORE_MAX;
71 static int create_audio_stream(AVFormatContext *s, SIFFContext *c)
74 ast = av_new_stream(s, 0);
77 ast->codec->codec_type = AVMEDIA_TYPE_AUDIO;
78 ast->codec->codec_id = CODEC_ID_PCM_U8;
79 ast->codec->channels = 1;
80 ast->codec->bits_per_coded_sample = c->bits;
81 ast->codec->sample_rate = c->rate;
82 ast->codec->frame_size = c->block_align;
83 av_set_pts_info(ast, 16, 1, c->rate);
87 static int siff_parse_vbv1(AVFormatContext *s, SIFFContext *c, ByteIOContext *pb)
92 if (get_le32(pb) != TAG_VBHD){
93 av_log(s, AV_LOG_ERROR, "Header chunk is missing\n");
96 if(get_be32(pb) != 32){
97 av_log(s, AV_LOG_ERROR, "Header chunk size is incorrect\n");
100 if(get_le16(pb) != 1){
101 av_log(s, AV_LOG_ERROR, "Incorrect header version\n");
104 width = get_le16(pb);
105 height = get_le16(pb);
107 c->frames = get_le16(pb);
109 av_log(s, AV_LOG_ERROR, "File contains no frames ???\n");
112 c->bits = get_le16(pb);
113 c->rate = get_le16(pb);
114 c->block_align = c->rate * (c->bits >> 3);
116 url_fskip(pb, 16); //zeroes
118 st = av_new_stream(s, 0);
121 st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
122 st->codec->codec_id = CODEC_ID_VB;
123 st->codec->codec_tag = MKTAG('V', 'B', 'V', '1');
124 st->codec->width = width;
125 st->codec->height = height;
126 st->codec->pix_fmt = PIX_FMT_PAL8;
127 av_set_pts_info(st, 16, 1, 12);
131 c->has_audio = !!c->rate;
133 if (c->has_audio && create_audio_stream(s, c) < 0)
138 static int siff_parse_soun(AVFormatContext *s, SIFFContext *c, ByteIOContext *pb)
140 if (get_le32(pb) != TAG_SHDR){
141 av_log(s, AV_LOG_ERROR, "Header chunk is missing\n");
144 if(get_be32(pb) != 8){
145 av_log(s, AV_LOG_ERROR, "Header chunk size is incorrect\n");
148 url_fskip(pb, 4); //unknown value
149 c->rate = get_le16(pb);
150 c->bits = get_le16(pb);
151 c->block_align = c->rate * (c->bits >> 3);
152 return create_audio_stream(s, c);
155 static int siff_read_header(AVFormatContext *s, AVFormatParameters *ap)
157 ByteIOContext *pb = s->pb;
158 SIFFContext *c = s->priv_data;
161 if (get_le32(pb) != TAG_SIFF)
163 url_fskip(pb, 4); //ignore size
166 if (tag != TAG_VBV1 && tag != TAG_SOUN){
167 av_log(s, AV_LOG_ERROR, "Not a VBV file\n");
171 if (tag == TAG_VBV1 && siff_parse_vbv1(s, c, pb) < 0)
173 if (tag == TAG_SOUN && siff_parse_soun(s, c, pb) < 0)
175 if (get_le32(pb) != MKTAG('B', 'O', 'D', 'Y')){
176 av_log(s, AV_LOG_ERROR, "'BODY' chunk is missing\n");
179 url_fskip(pb, 4); //ignore size
184 static int siff_read_packet(AVFormatContext *s, AVPacket *pkt)
186 SIFFContext *c = s->priv_data;
190 if (c->cur_frame >= c->frames)
192 if (c->curstrm == -1){
193 c->pktsize = get_le32(s->pb) - 4;
194 c->flags = get_le16(s->pb);
195 c->gmcsize = (c->flags & VB_HAS_GMC) ? 4 : 0;
197 get_buffer(s->pb, c->gmc, c->gmcsize);
198 c->sndsize = (c->flags & VB_HAS_AUDIO) ? get_le32(s->pb): 0;
199 c->curstrm = !!(c->flags & VB_HAS_AUDIO);
203 size = c->pktsize - c->sndsize;
204 if (av_new_packet(pkt, size) < 0)
205 return AVERROR(ENOMEM);
206 AV_WL16(pkt->data, c->flags);
208 memcpy(pkt->data + 2, c->gmc, c->gmcsize);
209 get_buffer(s->pb, pkt->data + 2 + c->gmcsize, size - c->gmcsize - 2);
210 pkt->stream_index = 0;
213 if (av_get_packet(s->pb, pkt, c->sndsize - 4) < 0)
215 pkt->stream_index = 1;
218 if(!c->cur_frame || c->curstrm)
219 pkt->flags |= AV_PKT_FLAG_KEY;
220 if (c->curstrm == -1)
223 size = av_get_packet(s->pb, pkt, c->block_align);
230 AVInputFormat siff_demuxer = {
232 NULL_IF_CONFIG_SMALL("Beam Software SIFF"),
237 .extensions = "vb,son"