| 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 | #include "avformat.h" |
| 25 | #include "internal.h" |
| 26 | #include "avio_internal.h" |
| 27 | |
| 28 | enum SIFFTags{ |
| 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'), |
| 35 | }; |
| 36 | |
| 37 | enum VBFlags{ |
| 38 | VB_HAS_GMC = 0x01, |
| 39 | VB_HAS_AUDIO = 0x04, |
| 40 | VB_HAS_VIDEO = 0x08, |
| 41 | VB_HAS_PALETTE = 0x10, |
| 42 | VB_HAS_LENGTH = 0x20 |
| 43 | }; |
| 44 | |
| 45 | typedef struct SIFFContext{ |
| 46 | int frames; |
| 47 | int cur_frame; |
| 48 | int rate; |
| 49 | int bits; |
| 50 | int block_align; |
| 51 | |
| 52 | int has_video; |
| 53 | int has_audio; |
| 54 | |
| 55 | int curstrm; |
| 56 | int pktsize; |
| 57 | int gmcsize; |
| 58 | int sndsize; |
| 59 | |
| 60 | int flags; |
| 61 | uint8_t gmc[4]; |
| 62 | }SIFFContext; |
| 63 | |
| 64 | static int siff_probe(AVProbeData *p) |
| 65 | { |
| 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)) |
| 70 | return 0; |
| 71 | return AVPROBE_SCORE_MAX; |
| 72 | } |
| 73 | |
| 74 | static int create_audio_stream(AVFormatContext *s, SIFFContext *c) |
| 75 | { |
| 76 | AVStream *ast; |
| 77 | ast = avformat_new_stream(s, NULL); |
| 78 | if (!ast) |
| 79 | return AVERROR(ENOMEM); |
| 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); |
| 87 | ast->start_time = 0; |
| 88 | return 0; |
| 89 | } |
| 90 | |
| 91 | static int siff_parse_vbv1(AVFormatContext *s, SIFFContext *c, AVIOContext *pb) |
| 92 | { |
| 93 | AVStream *st; |
| 94 | int width, height; |
| 95 | |
| 96 | if (avio_rl32(pb) != TAG_VBHD){ |
| 97 | av_log(s, AV_LOG_ERROR, "Header chunk is missing\n"); |
| 98 | return AVERROR_INVALIDDATA; |
| 99 | } |
| 100 | if(avio_rb32(pb) != 32){ |
| 101 | av_log(s, AV_LOG_ERROR, "Header chunk size is incorrect\n"); |
| 102 | return AVERROR_INVALIDDATA; |
| 103 | } |
| 104 | if(avio_rl16(pb) != 1){ |
| 105 | av_log(s, AV_LOG_ERROR, "Incorrect header version\n"); |
| 106 | return AVERROR_INVALIDDATA; |
| 107 | } |
| 108 | width = avio_rl16(pb); |
| 109 | height = avio_rl16(pb); |
| 110 | avio_skip(pb, 4); |
| 111 | c->frames = avio_rl16(pb); |
| 112 | if(!c->frames){ |
| 113 | av_log(s, AV_LOG_ERROR, "File contains no frames ???\n"); |
| 114 | return AVERROR_INVALIDDATA; |
| 115 | } |
| 116 | c->bits = avio_rl16(pb); |
| 117 | c->rate = avio_rl16(pb); |
| 118 | c->block_align = c->rate * (c->bits >> 3); |
| 119 | |
| 120 | avio_skip(pb, 16); //zeroes |
| 121 | |
| 122 | st = avformat_new_stream(s, NULL); |
| 123 | if (!st) |
| 124 | return AVERROR(ENOMEM); |
| 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 | st->nb_frames = |
| 132 | st->duration = c->frames; |
| 133 | avpriv_set_pts_info(st, 16, 1, 12); |
| 134 | |
| 135 | c->cur_frame = 0; |
| 136 | c->has_video = 1; |
| 137 | c->has_audio = !!c->rate; |
| 138 | c->curstrm = -1; |
| 139 | if (c->has_audio && create_audio_stream(s, c) < 0) |
| 140 | return AVERROR(ENOMEM); |
| 141 | return 0; |
| 142 | } |
| 143 | |
| 144 | static int siff_parse_soun(AVFormatContext *s, SIFFContext *c, AVIOContext *pb) |
| 145 | { |
| 146 | if (avio_rl32(pb) != TAG_SHDR){ |
| 147 | av_log(s, AV_LOG_ERROR, "Header chunk is missing\n"); |
| 148 | return AVERROR_INVALIDDATA; |
| 149 | } |
| 150 | if(avio_rb32(pb) != 8){ |
| 151 | av_log(s, AV_LOG_ERROR, "Header chunk size is incorrect\n"); |
| 152 | return AVERROR_INVALIDDATA; |
| 153 | } |
| 154 | avio_skip(pb, 4); //unknown value |
| 155 | c->rate = avio_rl16(pb); |
| 156 | c->bits = avio_rl16(pb); |
| 157 | c->block_align = c->rate * (c->bits >> 3); |
| 158 | return create_audio_stream(s, c); |
| 159 | } |
| 160 | |
| 161 | static int siff_read_header(AVFormatContext *s) |
| 162 | { |
| 163 | AVIOContext *pb = s->pb; |
| 164 | SIFFContext *c = s->priv_data; |
| 165 | uint32_t tag; |
| 166 | int ret; |
| 167 | |
| 168 | if (avio_rl32(pb) != TAG_SIFF) |
| 169 | return AVERROR_INVALIDDATA; |
| 170 | avio_skip(pb, 4); //ignore size |
| 171 | tag = avio_rl32(pb); |
| 172 | |
| 173 | if (tag != TAG_VBV1 && tag != TAG_SOUN){ |
| 174 | av_log(s, AV_LOG_ERROR, "Not a VBV file\n"); |
| 175 | return AVERROR_INVALIDDATA; |
| 176 | } |
| 177 | |
| 178 | if (tag == TAG_VBV1 && (ret = siff_parse_vbv1(s, c, pb)) < 0) |
| 179 | return ret; |
| 180 | if (tag == TAG_SOUN && (ret = siff_parse_soun(s, c, pb)) < 0) |
| 181 | return ret; |
| 182 | if (avio_rl32(pb) != MKTAG('B', 'O', 'D', 'Y')){ |
| 183 | av_log(s, AV_LOG_ERROR, "'BODY' chunk is missing\n"); |
| 184 | return AVERROR_INVALIDDATA; |
| 185 | } |
| 186 | avio_skip(pb, 4); //ignore size |
| 187 | |
| 188 | return 0; |
| 189 | } |
| 190 | |
| 191 | static int siff_read_packet(AVFormatContext *s, AVPacket *pkt) |
| 192 | { |
| 193 | SIFFContext *c = s->priv_data; |
| 194 | int size; |
| 195 | |
| 196 | if (c->has_video){ |
| 197 | if (c->cur_frame >= c->frames) |
| 198 | return AVERROR_EOF; |
| 199 | if (c->curstrm == -1){ |
| 200 | c->pktsize = avio_rl32(s->pb) - 4; |
| 201 | c->flags = avio_rl16(s->pb); |
| 202 | c->gmcsize = (c->flags & VB_HAS_GMC) ? 4 : 0; |
| 203 | if (c->gmcsize) |
| 204 | avio_read(s->pb, c->gmc, c->gmcsize); |
| 205 | c->sndsize = (c->flags & VB_HAS_AUDIO) ? avio_rl32(s->pb): 0; |
| 206 | c->curstrm = !!(c->flags & VB_HAS_AUDIO); |
| 207 | } |
| 208 | |
| 209 | if (!c->curstrm){ |
| 210 | size = c->pktsize - c->sndsize - c->gmcsize - 2; |
| 211 | size = ffio_limit(s->pb, size); |
| 212 | if(size < 0 || c->pktsize < c->sndsize) |
| 213 | return AVERROR_INVALIDDATA; |
| 214 | if (av_new_packet(pkt, size + c->gmcsize + 2) < 0) |
| 215 | return AVERROR(ENOMEM); |
| 216 | AV_WL16(pkt->data, c->flags); |
| 217 | if (c->gmcsize) |
| 218 | memcpy(pkt->data + 2, c->gmc, c->gmcsize); |
| 219 | if (avio_read(s->pb, pkt->data + 2 + c->gmcsize, size) != size) { |
| 220 | av_free_packet(pkt); |
| 221 | return AVERROR_INVALIDDATA; |
| 222 | } |
| 223 | pkt->stream_index = 0; |
| 224 | c->curstrm = -1; |
| 225 | }else{ |
| 226 | if ((size = av_get_packet(s->pb, pkt, c->sndsize - 4)) < 0) |
| 227 | return AVERROR(EIO); |
| 228 | pkt->stream_index = 1; |
| 229 | pkt->duration = size; |
| 230 | c->curstrm = 0; |
| 231 | } |
| 232 | if(!c->cur_frame || c->curstrm) |
| 233 | pkt->flags |= AV_PKT_FLAG_KEY; |
| 234 | if (c->curstrm == -1) |
| 235 | c->cur_frame++; |
| 236 | }else{ |
| 237 | size = av_get_packet(s->pb, pkt, c->block_align); |
| 238 | if(!size) |
| 239 | return AVERROR_EOF; |
| 240 | if(size < 0) |
| 241 | return AVERROR(EIO); |
| 242 | pkt->duration = size; |
| 243 | } |
| 244 | return pkt->size; |
| 245 | } |
| 246 | |
| 247 | AVInputFormat ff_siff_demuxer = { |
| 248 | .name = "siff", |
| 249 | .long_name = NULL_IF_CONFIG_SMALL("Beam Software SIFF"), |
| 250 | .priv_data_size = sizeof(SIFFContext), |
| 251 | .read_probe = siff_probe, |
| 252 | .read_header = siff_read_header, |
| 253 | .read_packet = siff_read_packet, |
| 254 | .extensions = "vb,son", |
| 255 | }; |