libavformat/siff.c

   1 /*
   2  * Beam Software SIFF demuxer
   3  * Copyright (c) 2007 Konstantin Shishkov
   4  *
   5  * This file is part of Libav.
   6  *
   7  * Libav 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  * Libav 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 Libav; 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 #include "avformat.h"
  25 #include "internal.h"
  26
  27 enum SIFFTags{
  28     TAG_SIFF = MKTAG('S', 'I', 'F', 'F'),
  29     TAG_BODY = MKTAG('B', 'O', 'D', 'Y'),
  30     TAG_VBHD = MKTAG('V', 'B', 'H', 'D'),
  31     TAG_SHDR = MKTAG('S', 'H', 'D', 'R'),
  32     TAG_VBV1 = MKTAG('V', 'B', 'V', '1'),
  33     TAG_SOUN = MKTAG('S', 'O', 'U', 'N'),
  34 };
  35
  36 enum VBFlags{
  37     VB_HAS_GMC     = 0x01,
  38     VB_HAS_AUDIO   = 0x04,
  39     VB_HAS_VIDEO   = 0x08,
  40     VB_HAS_PALETTE = 0x10,
  41     VB_HAS_LENGTH  = 0x20
  42 };
  43
  44 typedef struct SIFFContext{
  45     int frames;
  46     int cur_frame;
  47     int rate;
  48     int bits;
  49     int block_align;
  50
  51     int has_video;
  52     int has_audio;
  53
  54     int curstrm;
  55     int pktsize;
  56     int gmcsize;
  57     int sndsize;
  58
  59     int flags;
  60     uint8_t gmc[4];
  61 }SIFFContext;
  62
  63 static int siff_probe(AVProbeData *p)
  64 {
  65     uint32_t tag = AV_RL32(p->buf + 8);
  66     /* check file header */
  67     if (AV_RL32(p->buf) != TAG_SIFF ||
  68         (tag != TAG_VBV1 && tag != TAG_SOUN))
  69         return 0;
  70     return AVPROBE_SCORE_MAX;
  71 }
  72
  73 static int create_audio_stream(AVFormatContext *s, SIFFContext *c)
  74 {
  75     AVStream *ast;
  76     ast = avformat_new_stream(s, NULL);
  77     if (!ast)
  78         return -1;
  79     ast->codec->codec_type      = AVMEDIA_TYPE_AUDIO;
  80     ast->codec->codec_id        = AV_CODEC_ID_PCM_U8;
  81     ast->codec->channels        = 1;
  82     ast->codec->channel_layout  = AV_CH_LAYOUT_MONO;
  83     ast->codec->bits_per_coded_sample = 8;
  84     ast->codec->sample_rate     = c->rate;
  85     avpriv_set_pts_info(ast, 16, 1, c->rate);
  86     ast->start_time = 0;
  87     return 0;
  88 }
  89
  90 static int siff_parse_vbv1(AVFormatContext *s, SIFFContext *c, AVIOContext *pb)
  91 {
  92     AVStream *st;
  93     int width, height;
  94
  95     if (avio_rl32(pb) != TAG_VBHD){
  96         av_log(s, AV_LOG_ERROR, "Header chunk is missing\n");
  97         return -1;
  98     }
  99     if(avio_rb32(pb) != 32){
 100         av_log(s, AV_LOG_ERROR, "Header chunk size is incorrect\n");
 101         return -1;
 102     }
 103     if(avio_rl16(pb) != 1){
 104         av_log(s, AV_LOG_ERROR, "Incorrect header version\n");
 105         return -1;
 106     }
 107     width = avio_rl16(pb);
 108     height = avio_rl16(pb);
 109     avio_skip(pb, 4);
 110     c->frames = avio_rl16(pb);
 111     if(!c->frames){
 112         av_log(s, AV_LOG_ERROR, "File contains no frames ???\n");
 113         return -1;
 114     }
 115     c->bits = avio_rl16(pb);
 116     c->rate = avio_rl16(pb);
 117     c->block_align = c->rate * (c->bits >> 3);
 118
 119     avio_skip(pb, 16); //zeroes
 120
 121     st = avformat_new_stream(s, NULL);
 122     if (!st)
 123         return -1;
 124     st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
 125     st->codec->codec_id   = AV_CODEC_ID_VB;
 126     st->codec->codec_tag  = MKTAG('V', 'B', 'V', '1');
 127     st->codec->width      = width;
 128     st->codec->height     = height;
 129     st->codec->pix_fmt    = AV_PIX_FMT_PAL8;
 130     avpriv_set_pts_info(st, 16, 1, 12);
 131
 132     c->cur_frame = 0;
 133     c->has_video = 1;
 134     c->has_audio = !!c->rate;
 135     c->curstrm = -1;
 136     if (c->has_audio && create_audio_stream(s, c) < 0)
 137         return -1;
 138     return 0;
 139 }
 140
 141 static int siff_parse_soun(AVFormatContext *s, SIFFContext *c, AVIOContext *pb)
 142 {
 143     if (avio_rl32(pb) != TAG_SHDR){
 144         av_log(s, AV_LOG_ERROR, "Header chunk is missing\n");
 145         return -1;
 146     }
 147     if(avio_rb32(pb) != 8){
 148         av_log(s, AV_LOG_ERROR, "Header chunk size is incorrect\n");
 149         return -1;
 150     }
 151     avio_skip(pb, 4); //unknown value
 152     c->rate = avio_rl16(pb);
 153     c->bits = avio_rl16(pb);
 154     c->block_align = c->rate * (c->bits >> 3);
 155     return create_audio_stream(s, c);
 156 }
 157
 158 static int siff_read_header(AVFormatContext *s)
 159 {
 160     AVIOContext *pb = s->pb;
 161     SIFFContext *c = s->priv_data;
 162     uint32_t tag;
 163
 164     if (avio_rl32(pb) != TAG_SIFF)
 165         return -1;
 166     avio_skip(pb, 4); //ignore size
 167     tag = avio_rl32(pb);
 168
 169     if (tag != TAG_VBV1 && tag != TAG_SOUN){
 170         av_log(s, AV_LOG_ERROR, "Not a VBV file\n");
 171         return -1;
 172     }
 173
 174     if (tag == TAG_VBV1 && siff_parse_vbv1(s, c, pb) < 0)
 175         return -1;
 176     if (tag == TAG_SOUN && siff_parse_soun(s, c, pb) < 0)
 177         return -1;
 178     if (avio_rl32(pb) != MKTAG('B', 'O', 'D', 'Y')){
 179         av_log(s, AV_LOG_ERROR, "'BODY' chunk is missing\n");
 180         return -1;
 181     }
 182     avio_skip(pb, 4); //ignore size
 183
 184     return 0;
 185 }
 186
 187 static int siff_read_packet(AVFormatContext *s, AVPacket *pkt)
 188 {
 189     SIFFContext *c = s->priv_data;
 190     int size;
 191
 192     if (c->has_video){
 193         if (c->cur_frame >= c->frames)
 194             return AVERROR(EIO);
 195         if (c->curstrm == -1){
 196             c->pktsize = avio_rl32(s->pb) - 4;
 197             c->flags = avio_rl16(s->pb);
 198             c->gmcsize = (c->flags & VB_HAS_GMC) ? 4 : 0;
 199             if (c->gmcsize)
 200                 avio_read(s->pb, c->gmc, c->gmcsize);
 201             c->sndsize = (c->flags & VB_HAS_AUDIO) ? avio_rl32(s->pb): 0;
 202             c->curstrm = !!(c->flags & VB_HAS_AUDIO);
 203         }
 204
 205         if (!c->curstrm){
 206             size = c->pktsize - c->sndsize;
 207             if (av_new_packet(pkt, size) < 0)
 208                 return AVERROR(ENOMEM);
 209             AV_WL16(pkt->data, c->flags);
 210             if (c->gmcsize)
 211                 memcpy(pkt->data + 2, c->gmc, c->gmcsize);
 212             avio_read(s->pb, pkt->data + 2 + c->gmcsize, size - c->gmcsize - 2);
 213             pkt->stream_index = 0;
 214             c->curstrm = -1;
 215         }else{
 216             if ((size = av_get_packet(s->pb, pkt, c->sndsize - 4)) < 0)
 217                 return AVERROR(EIO);
 218             pkt->stream_index = 1;
 219             pkt->duration     = size;
 220             c->curstrm = 0;
 221         }
 222         if(!c->cur_frame || c->curstrm)
 223             pkt->flags |= AV_PKT_FLAG_KEY;
 224         if (c->curstrm == -1)
 225             c->cur_frame++;
 226     }else{
 227         size = av_get_packet(s->pb, pkt, c->block_align);
 228         if(size <= 0)
 229             return AVERROR(EIO);
 230         pkt->duration = size;
 231     }
 232     return pkt->size;
 233 }
 234
 235 AVInputFormat ff_siff_demuxer = {
 236     .name           = "siff",
 237     .long_name      = NULL_IF_CONFIG_SMALL("Beam Software SIFF"),
 238     .priv_data_size = sizeof(SIFFContext),
 239     .read_probe     = siff_probe,
 240     .read_header    = siff_read_header,
 241     .read_packet    = siff_read_packet,
 242     .extensions     = "vb,son",
 243 };