| 1 | /* |
| 2 | * LucasArts Smush demuxer |
| 3 | * Copyright (c) 2006 Cyril Zorin |
| 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/intreadwrite.h" |
| 23 | |
| 24 | #include "avformat.h" |
| 25 | #include "avio.h" |
| 26 | #include "internal.h" |
| 27 | |
| 28 | typedef struct SMUSHContext { |
| 29 | int version; |
| 30 | int audio_stream_index; |
| 31 | int video_stream_index; |
| 32 | } SMUSHContext; |
| 33 | |
| 34 | static int smush_read_probe(AVProbeData *p) |
| 35 | { |
| 36 | if (((AV_RL32(p->buf) == MKTAG('S', 'A', 'N', 'M') && |
| 37 | AV_RL32(p->buf + 8) == MKTAG('S', 'H', 'D', 'R')) || |
| 38 | (AV_RL32(p->buf) == MKTAG('A', 'N', 'I', 'M') && |
| 39 | AV_RL32(p->buf + 8) == MKTAG('A', 'H', 'D', 'R')))) { |
| 40 | return AVPROBE_SCORE_MAX; |
| 41 | } |
| 42 | |
| 43 | return 0; |
| 44 | } |
| 45 | |
| 46 | static int smush_read_header(AVFormatContext *ctx) |
| 47 | { |
| 48 | SMUSHContext *smush = ctx->priv_data; |
| 49 | AVIOContext *pb = ctx->pb; |
| 50 | AVStream *vst, *ast; |
| 51 | uint32_t magic, nframes, size, subversion, i; |
| 52 | uint32_t width = 0, height = 0, got_audio = 0, read = 0; |
| 53 | uint32_t sample_rate, channels, palette[256]; |
| 54 | |
| 55 | magic = avio_rb32(pb); |
| 56 | avio_skip(pb, 4); // skip movie size |
| 57 | |
| 58 | if (magic == MKBETAG('A', 'N', 'I', 'M')) { |
| 59 | if (avio_rb32(pb) != MKBETAG('A', 'H', 'D', 'R')) |
| 60 | return AVERROR_INVALIDDATA; |
| 61 | |
| 62 | size = avio_rb32(pb); |
| 63 | if (size < 3 * 256 + 6) |
| 64 | return AVERROR_INVALIDDATA; |
| 65 | |
| 66 | smush->version = 0; |
| 67 | subversion = avio_rl16(pb); |
| 68 | nframes = avio_rl16(pb); |
| 69 | if (!nframes) |
| 70 | return AVERROR_INVALIDDATA; |
| 71 | |
| 72 | avio_skip(pb, 2); // skip pad |
| 73 | |
| 74 | for (i = 0; i < 256; i++) |
| 75 | palette[i] = avio_rb24(pb); |
| 76 | |
| 77 | avio_skip(pb, size - (3 * 256 + 6)); |
| 78 | } else if (magic == MKBETAG('S', 'A', 'N', 'M')) { |
| 79 | if (avio_rb32(pb) != MKBETAG('S', 'H', 'D', 'R')) |
| 80 | return AVERROR_INVALIDDATA; |
| 81 | |
| 82 | size = avio_rb32(pb); |
| 83 | if (size < 14) |
| 84 | return AVERROR_INVALIDDATA; |
| 85 | |
| 86 | smush->version = 1; |
| 87 | subversion = avio_rl16(pb); |
| 88 | nframes = avio_rl32(pb); |
| 89 | if (!nframes) |
| 90 | return AVERROR_INVALIDDATA; |
| 91 | |
| 92 | avio_skip(pb, 2); // skip pad |
| 93 | width = avio_rl16(pb); |
| 94 | height = avio_rl16(pb); |
| 95 | avio_skip(pb, 2); // skip pad |
| 96 | avio_skip(pb, size - 14); |
| 97 | |
| 98 | if (avio_rb32(pb) != MKBETAG('F', 'L', 'H', 'D')) |
| 99 | return AVERROR_INVALIDDATA; |
| 100 | |
| 101 | size = avio_rb32(pb); |
| 102 | while (!got_audio && ((read + 8) < size)) { |
| 103 | uint32_t sig, chunk_size; |
| 104 | |
| 105 | if (avio_feof(pb)) |
| 106 | return AVERROR_EOF; |
| 107 | |
| 108 | sig = avio_rb32(pb); |
| 109 | chunk_size = avio_rb32(pb); |
| 110 | read += 8; |
| 111 | switch (sig) { |
| 112 | case MKBETAG('W', 'a', 'v', 'e'): |
| 113 | got_audio = 1; |
| 114 | sample_rate = avio_rl32(pb); |
| 115 | if (!sample_rate) |
| 116 | return AVERROR_INVALIDDATA; |
| 117 | |
| 118 | channels = avio_rl32(pb); |
| 119 | if (!channels) |
| 120 | return AVERROR_INVALIDDATA; |
| 121 | |
| 122 | avio_skip(pb, chunk_size - 8); |
| 123 | read += chunk_size; |
| 124 | break; |
| 125 | case MKBETAG('B', 'l', '1', '6'): |
| 126 | case MKBETAG('A', 'N', 'N', 'O'): |
| 127 | avio_skip(pb, chunk_size); |
| 128 | read += chunk_size; |
| 129 | break; |
| 130 | default: |
| 131 | return AVERROR_INVALIDDATA; |
| 132 | break; |
| 133 | } |
| 134 | } |
| 135 | |
| 136 | avio_skip(pb, size - read); |
| 137 | } else { |
| 138 | av_log(ctx, AV_LOG_ERROR, "Wrong magic\n"); |
| 139 | return AVERROR_INVALIDDATA; |
| 140 | } |
| 141 | |
| 142 | vst = avformat_new_stream(ctx, 0); |
| 143 | if (!vst) |
| 144 | return AVERROR(ENOMEM); |
| 145 | |
| 146 | smush->video_stream_index = vst->index; |
| 147 | |
| 148 | avpriv_set_pts_info(vst, 64, 1, 15); |
| 149 | |
| 150 | vst->start_time = 0; |
| 151 | vst->duration = |
| 152 | vst->nb_frames = nframes; |
| 153 | vst->avg_frame_rate = av_inv_q(vst->time_base); |
| 154 | vst->codec->codec_type = AVMEDIA_TYPE_VIDEO; |
| 155 | vst->codec->codec_id = AV_CODEC_ID_SANM; |
| 156 | vst->codec->codec_tag = 0; |
| 157 | vst->codec->width = width; |
| 158 | vst->codec->height = height; |
| 159 | |
| 160 | if (!smush->version) { |
| 161 | if (ff_alloc_extradata(vst->codec, 1024 + 2)) |
| 162 | return AVERROR(ENOMEM); |
| 163 | |
| 164 | AV_WL16(vst->codec->extradata, subversion); |
| 165 | for (i = 0; i < 256; i++) |
| 166 | AV_WL32(vst->codec->extradata + 2 + i * 4, palette[i]); |
| 167 | } |
| 168 | |
| 169 | if (got_audio) { |
| 170 | ast = avformat_new_stream(ctx, 0); |
| 171 | if (!ast) |
| 172 | return AVERROR(ENOMEM); |
| 173 | |
| 174 | smush->audio_stream_index = ast->index; |
| 175 | |
| 176 | ast->start_time = 0; |
| 177 | ast->codec->codec_type = AVMEDIA_TYPE_AUDIO; |
| 178 | ast->codec->codec_id = AV_CODEC_ID_ADPCM_VIMA; |
| 179 | ast->codec->codec_tag = 0; |
| 180 | ast->codec->sample_rate = sample_rate; |
| 181 | ast->codec->channels = channels; |
| 182 | |
| 183 | avpriv_set_pts_info(ast, 64, 1, ast->codec->sample_rate); |
| 184 | } |
| 185 | |
| 186 | return 0; |
| 187 | } |
| 188 | |
| 189 | static int smush_read_packet(AVFormatContext *ctx, AVPacket *pkt) |
| 190 | { |
| 191 | SMUSHContext *smush = ctx->priv_data; |
| 192 | AVIOContext *pb = ctx->pb; |
| 193 | int done = 0; |
| 194 | int ret; |
| 195 | |
| 196 | while (!done) { |
| 197 | uint32_t sig, size; |
| 198 | |
| 199 | if (avio_feof(pb)) |
| 200 | return AVERROR_EOF; |
| 201 | |
| 202 | sig = avio_rb32(pb); |
| 203 | size = avio_rb32(pb); |
| 204 | |
| 205 | switch (sig) { |
| 206 | case MKBETAG('F', 'R', 'M', 'E'): |
| 207 | if (smush->version) |
| 208 | break; |
| 209 | if ((ret = av_get_packet(pb, pkt, size)) < 0) |
| 210 | return ret; |
| 211 | |
| 212 | pkt->stream_index = smush->video_stream_index; |
| 213 | done = 1; |
| 214 | break; |
| 215 | case MKBETAG('B', 'l', '1', '6'): |
| 216 | if ((ret = av_get_packet(pb, pkt, size)) < 0) |
| 217 | return ret; |
| 218 | |
| 219 | pkt->stream_index = smush->video_stream_index; |
| 220 | pkt->duration = 1; |
| 221 | done = 1; |
| 222 | break; |
| 223 | case MKBETAG('W', 'a', 'v', 'e'): |
| 224 | if (size < 13) |
| 225 | return AVERROR_INVALIDDATA; |
| 226 | if (av_get_packet(pb, pkt, size) < 13) |
| 227 | return AVERROR(EIO); |
| 228 | |
| 229 | pkt->stream_index = smush->audio_stream_index; |
| 230 | pkt->flags |= AV_PKT_FLAG_KEY; |
| 231 | pkt->duration = AV_RB32(pkt->data); |
| 232 | if (pkt->duration == 0xFFFFFFFFu) |
| 233 | pkt->duration = AV_RB32(pkt->data + 8); |
| 234 | done = 1; |
| 235 | break; |
| 236 | default: |
| 237 | avio_skip(pb, size); |
| 238 | break; |
| 239 | } |
| 240 | } |
| 241 | |
| 242 | return 0; |
| 243 | } |
| 244 | |
| 245 | AVInputFormat ff_smush_demuxer = { |
| 246 | .name = "smush", |
| 247 | .long_name = NULL_IF_CONFIG_SMALL("LucasArts Smush"), |
| 248 | .priv_data_size = sizeof(SMUSHContext), |
| 249 | .read_probe = smush_read_probe, |
| 250 | .read_header = smush_read_header, |
| 251 | .read_packet = smush_read_packet, |
| 252 | }; |