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 28typedef struct SMUSHContext { 29 int version; 30 int audio_stream_index; 31 int video_stream_index; 32} SMUSHContext; 33 34static 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 46static 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 (url_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 189static 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 (url_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 245AVInputFormat 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}; 253