libavformat/siff.c

   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
  29 enum 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
  38 enum 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
  46 typedef 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
  65 static int siff_probe(const 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
  75 static 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
  92 static 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
 145 static 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
 162 static 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
 192 static int siff_read_packet(AVFormatContext *s, AVPacket *pkt)
 193 {
 194     SIFFContext *c = s->priv_data;
 195     int ret;
 196
 197     if (c->has_video) {
 198         unsigned int size;
 199         if (c->cur_frame >= c->frames)
 200             return AVERROR_EOF;
 201         if (c->curstrm == -1) {
 202             unsigned pktsize = avio_rl32(s->pb);
 203             if (pktsize < 4)
 204                 return AVERROR_INVALIDDATA;
 205             c->pktsize = pktsize - 4;
 206             c->flags   = avio_rl16(s->pb);
 207             if (c->flags & VB_HAS_AUDIO && !c->has_audio)
 208                 return AVERROR_INVALIDDATA;
 209             c->gmcsize = (c->flags & VB_HAS_GMC) ? 4 : 0;
 210             if (c->gmcsize)
 211                 avio_read(s->pb, c->gmc, c->gmcsize);
 212             c->sndsize = (c->flags & VB_HAS_AUDIO) ? avio_rl32(s->pb) : 0;
 213             c->curstrm = !!(c->flags & VB_HAS_AUDIO);
 214         }
 215
 216         if (!c->curstrm) {
 217             if (c->pktsize < 2LL + c->sndsize + c->gmcsize)
 218                 return AVERROR_INVALIDDATA;
 219
 220             size = c->pktsize - c->sndsize - c->gmcsize - 2;
 221             size = ffio_limit(s->pb, size);
 222             if ((ret = av_new_packet(pkt, size + c->gmcsize + 2)) < 0)
 223                 return ret;
 224             AV_WL16(pkt->data, c->flags);
 225             if (c->gmcsize)
 226                 memcpy(pkt->data + 2, c->gmc, c->gmcsize);
 227             if (avio_read(s->pb, pkt->data + 2 + c->gmcsize, size) != size) {
 228                 return AVERROR_INVALIDDATA;
 229             }
 230             pkt->stream_index = 0;
 231             c->curstrm        = -1;
 232         } else {
 233             int pktsize = av_get_packet(s->pb, pkt, c->sndsize - 4);
 234             if (pktsize < 0)
 235                 return AVERROR(EIO);
 236             pkt->stream_index = 1;
 237             pkt->duration     = pktsize;
 238             c->curstrm        = 0;
 239         }
 240         if (!c->cur_frame || c->curstrm)
 241             pkt->flags |= AV_PKT_FLAG_KEY;
 242         if (c->curstrm == -1)
 243             c->cur_frame++;
 244     } else {
 245         int pktsize = av_get_packet(s->pb, pkt, c->block_align);
 246         if (!pktsize)
 247             return AVERROR_EOF;
 248         if (pktsize <= 0)
 249             return AVERROR(EIO);
 250         pkt->duration = pktsize;
 251     }
 252     return pkt->size;
 253 }
 254
 255 AVInputFormat ff_siff_demuxer = {
 256     .name           = "siff",
 257     .long_name      = NULL_IF_CONFIG_SMALL("Beam Software SIFF"),
 258     .priv_data_size = sizeof(SIFFContext),
 259     .read_probe     = siff_probe,
 260     .read_header    = siff_read_header,
 261     .read_packet    = siff_read_packet,
 262     .extensions     = "vb,son",
 263 };