1/* 2 * Bink demuxer 3 * Copyright (c) 2008-2010 Peter Ross (pross@xvid.org) 4 * Copyright (c) 2009 Daniel Verkamp (daniel@drv.nu) 5 * 6 * This file is part of FFmpeg. 7 * 8 * FFmpeg is free software; you can redistribute it and/or 9 * modify it under the terms of the GNU Lesser General Public 10 * License as published by the Free Software Foundation; either 11 * version 2.1 of the License, or (at your option) any later version. 12 * 13 * FFmpeg is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 16 * Lesser General Public License for more details. 17 * 18 * You should have received a copy of the GNU Lesser General Public 19 * License along with FFmpeg; if not, write to the Free Software 20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 21 */ 22 23/** 24 * @file 25 * Bink demuxer 26 * 27 * Technical details here: 28 * http://wiki.multimedia.cx/index.php?title=Bink_Container 29 */ 30 31#include <inttypes.h> 32 33#include "libavutil/channel_layout.h" 34#include "libavutil/intreadwrite.h" 35#include "avformat.h" 36#include "demux.h" 37#include "internal.h" 38 39enum BinkAudFlags { 40 BINK_AUD_16BITS = 0x4000, ///< prefer 16-bit output 41 BINK_AUD_STEREO = 0x2000, 42 BINK_AUD_USEDCT = 0x1000, 43}; 44 45#define BINK_EXTRADATA_SIZE 1 46#define BINK_MAX_AUDIO_TRACKS 256 47#define BINK_MAX_WIDTH 7680 48#define BINK_MAX_HEIGHT 4800 49#define SMUSH_BLOCK_SIZE 512 50 51typedef struct BinkDemuxContext { 52 uint32_t file_size; 53 54 uint32_t num_audio_tracks; 55 int current_track; ///< audio track to return in next packet 56 int64_t video_pts; 57 int64_t audio_pts[BINK_MAX_AUDIO_TRACKS]; 58 59 uint32_t remain_packet_size; 60 int flags; 61 int smush_size; 62} BinkDemuxContext; 63 64static int probe(const AVProbeData *p) 65{ 66 const uint8_t *b = p->buf; 67 int smush = AV_RN32(p->buf) == AV_RN32("SMUS"); 68 69 do { 70 if (((b[0] == 'B' && b[1] == 'I' && b[2] == 'K' && /* Bink 1 */ 71 (b[3] == 'b' || b[3] == 'f' || b[3] == 'g' || b[3] == 'h' || b[3] == 'i' || 72 b[3] == 'k')) || 73 (b[0] == 'K' && b[1] == 'B' && b[2] == '2' && /* Bink 2 */ 74 (b[3] == 'a' || b[3] == 'd' || b[3] == 'f' || b[3] == 'g' || b[3] == 'h' || 75 b[3] == 'i' || b[3] == 'j' || b[3] == 'k'))) && 76 AV_RL32(b+8) > 0 && // num_frames 77 AV_RL32(b+20) > 0 && AV_RL32(b+20) <= BINK_MAX_WIDTH && 78 AV_RL32(b+24) > 0 && AV_RL32(b+24) <= BINK_MAX_HEIGHT && 79 AV_RL32(b+28) > 0 && AV_RL32(b+32) > 0) // fps num,den 80 return AVPROBE_SCORE_MAX; 81 b += SMUSH_BLOCK_SIZE; 82 } while (smush && b < p->buf + p->buf_size - 32); 83 return 0; 84} 85 86static int read_header(AVFormatContext *s) 87{ 88 BinkDemuxContext *bink = s->priv_data; 89 AVIOContext *pb = s->pb; 90 uint32_t fps_num, fps_den; 91 AVStream *const vst = avformat_new_stream(s, NULL); 92 FFStream *const vsti = ffstream(vst); 93 unsigned int i; 94 uint32_t pos, next_pos; 95 uint16_t flags; 96 int next_keyframe = 1; 97 int keyframe; 98 int ret; 99 uint32_t signature; 100 uint8_t revision; 101 102 if (!vst) 103 return AVERROR(ENOMEM); 104 105 vst->codecpar->codec_tag = avio_rl32(pb); 106 if (vst->codecpar->codec_tag == AV_RL32("SMUS")) { 107 do { 108 bink->smush_size += SMUSH_BLOCK_SIZE; 109 avio_skip(pb, SMUSH_BLOCK_SIZE - 4); 110 vst->codecpar->codec_tag = avio_rl32(pb); 111 } while (!avio_feof(pb) && (vst->codecpar->codec_tag & 0xFFFFFF) != AV_RL32("BIK")); 112 if (avio_feof(pb)) { 113 av_log(s, AV_LOG_ERROR, "invalid SMUSH header: BIK not found\n"); 114 return AVERROR_INVALIDDATA; 115 } 116 } 117 118 bink->file_size = avio_rl32(pb) + 8; 119 vst->duration = avio_rl32(pb); 120 121 if (vst->duration > 1000000) { 122 av_log(s, AV_LOG_ERROR, "invalid header: more than 1000000 frames\n"); 123 return AVERROR(EIO); 124 } 125 126 if (avio_rl32(pb) > bink->file_size) { 127 av_log(s, AV_LOG_ERROR, 128 "invalid header: largest frame size greater than file size\n"); 129 return AVERROR(EIO); 130 } 131 132 avio_skip(pb, 4); 133 134 vst->codecpar->width = avio_rl32(pb); 135 vst->codecpar->height = avio_rl32(pb); 136 137 fps_num = avio_rl32(pb); 138 fps_den = avio_rl32(pb); 139 if (fps_num == 0 || fps_den == 0) { 140 av_log(s, AV_LOG_ERROR, 141 "invalid header: invalid fps (%"PRIu32"/%"PRIu32")\n", 142 fps_num, fps_den); 143 return AVERROR(EIO); 144 } 145 avpriv_set_pts_info(vst, 64, fps_den, fps_num); 146 vst->avg_frame_rate = av_inv_q(vst->time_base); 147 148 vst->codecpar->codec_type = AVMEDIA_TYPE_VIDEO; 149 vst->codecpar->codec_id = AV_CODEC_ID_BINKVIDEO; 150 151 if ((vst->codecpar->codec_tag & 0xFFFFFF) == MKTAG('K', 'B', '2', 0)) { 152 av_log(s, AV_LOG_WARNING, "Bink 2 video is not implemented\n"); 153 vst->codecpar->codec_id = AV_CODEC_ID_NONE; 154 } 155 156 if ((ret = ff_get_extradata(s, vst->codecpar, pb, 4)) < 0) 157 return ret; 158 159 bink->num_audio_tracks = avio_rl32(pb); 160 161 if (bink->num_audio_tracks > BINK_MAX_AUDIO_TRACKS) { 162 av_log(s, AV_LOG_ERROR, 163 "invalid header: more than "AV_STRINGIFY(BINK_MAX_AUDIO_TRACKS)" audio tracks (%"PRIu32")\n", 164 bink->num_audio_tracks); 165 return AVERROR(EIO); 166 } 167 168 signature = (vst->codecpar->codec_tag & 0xFFFFFF); 169 revision = ((vst->codecpar->codec_tag >> 24) % 0xFF); 170 171 if ((signature == AV_RL32("BIK") && (revision == 'k')) || 172 (signature == AV_RL32("KB2") && (revision == 'i' || revision == 'j' || revision == 'k'))) 173 avio_skip(pb, 4); /* unknown new field */ 174 175 if (bink->num_audio_tracks) { 176 avio_skip(pb, 4 * bink->num_audio_tracks); /* max decoded size */ 177 178 for (i = 0; i < bink->num_audio_tracks; i++) { 179 AVStream *const ast = avformat_new_stream(s, NULL); 180 if (!ast) 181 return AVERROR(ENOMEM); 182 ast->codecpar->codec_type = AVMEDIA_TYPE_AUDIO; 183 ast->codecpar->codec_tag = 0; 184 ast->codecpar->sample_rate = avio_rl16(pb); 185 avpriv_set_pts_info(ast, 64, 1, ast->codecpar->sample_rate); 186 flags = avio_rl16(pb); 187 ast->codecpar->codec_id = flags & BINK_AUD_USEDCT ? 188 AV_CODEC_ID_BINKAUDIO_DCT : AV_CODEC_ID_BINKAUDIO_RDFT; 189 if (flags & BINK_AUD_STEREO) { 190 ast->codecpar->ch_layout = (AVChannelLayout)AV_CHANNEL_LAYOUT_STEREO; 191 } else { 192 ast->codecpar->ch_layout = (AVChannelLayout)AV_CHANNEL_LAYOUT_MONO; 193 } 194 if ((ret = ff_alloc_extradata(ast->codecpar, 4)) < 0) 195 return ret; 196 AV_WL32(ast->codecpar->extradata, vst->codecpar->codec_tag); 197 } 198 199 for (i = 0; i < bink->num_audio_tracks; i++) 200 s->streams[i + 1]->id = avio_rl32(pb); 201 } 202 203 /* frame index table */ 204 next_pos = avio_rl32(pb); 205 for (i = 0; i < vst->duration; i++) { 206 pos = next_pos; 207 keyframe = next_keyframe; 208 if (i == vst->duration - 1) { 209 next_pos = bink->file_size; 210 next_keyframe = 0; 211 } else { 212 next_pos = avio_rl32(pb); 213 next_keyframe = next_pos & 1; 214 } 215 pos &= ~1; 216 next_pos &= ~1; 217 218 if (next_pos <= pos) { 219 av_log(s, AV_LOG_ERROR, "invalid frame index table\n"); 220 return AVERROR(EIO); 221 } 222 if ((ret = av_add_index_entry(vst, pos, i, next_pos - pos, 0, 223 keyframe ? AVINDEX_KEYFRAME : 0)) < 0) 224 return ret; 225 } 226 227 if (vsti->index_entries) 228 avio_seek(pb, vsti->index_entries[0].pos + bink->smush_size, SEEK_SET); 229 else 230 avio_skip(pb, 4); 231 232 bink->current_track = -1; 233 return 0; 234} 235 236static int read_packet(AVFormatContext *s, AVPacket *pkt) 237{ 238 BinkDemuxContext *bink = s->priv_data; 239 AVIOContext *pb = s->pb; 240 int ret; 241 242 if (bink->current_track < 0) { 243 int index_entry; 244 AVStream *st = s->streams[0]; // stream 0 is video stream with index 245 FFStream *const sti = ffstream(st); 246 247 if (bink->video_pts >= st->duration) 248 return AVERROR_EOF; 249 250 index_entry = av_index_search_timestamp(st, bink->video_pts, 251 AVSEEK_FLAG_ANY); 252 if (index_entry < 0) { 253 av_log(s, AV_LOG_ERROR, 254 "could not find index entry for frame %"PRId64"\n", 255 bink->video_pts); 256 return AVERROR(EIO); 257 } 258 259 bink->remain_packet_size = sti->index_entries[index_entry].size; 260 bink->flags = sti->index_entries[index_entry].flags; 261 bink->current_track = 0; 262 } 263 264 while (bink->current_track < bink->num_audio_tracks) { 265 uint32_t audio_size = avio_rl32(pb); 266 if (audio_size > bink->remain_packet_size - 4) { 267 av_log(s, AV_LOG_ERROR, 268 "frame %"PRId64": audio size in header (%"PRIu32") > size of packet left (%"PRIu32")\n", 269 bink->video_pts, audio_size, bink->remain_packet_size); 270 return AVERROR(EIO); 271 } 272 bink->remain_packet_size -= 4 + audio_size; 273 bink->current_track++; 274 if (audio_size >= 4) { 275 /* get one audio packet per track */ 276 if ((ret = av_get_packet(pb, pkt, audio_size)) < 0) 277 return ret; 278 pkt->stream_index = bink->current_track; 279 pkt->pts = bink->audio_pts[bink->current_track - 1]; 280 281 /* Each audio packet reports the number of decompressed samples 282 (in bytes). We use this value to calculate the audio PTS */ 283 if (pkt->size >= 4) 284 bink->audio_pts[bink->current_track -1] += 285 AV_RL32(pkt->data) / (2 * s->streams[bink->current_track]->codecpar->ch_layout.nb_channels); 286 return 0; 287 } else { 288 avio_skip(pb, audio_size); 289 } 290 } 291 292 /* get video packet */ 293 if ((ret = av_get_packet(pb, pkt, bink->remain_packet_size)) < 0) 294 return ret; 295 pkt->stream_index = 0; 296 pkt->pts = bink->video_pts++; 297 if (bink->flags & AVINDEX_KEYFRAME) 298 pkt->flags |= AV_PKT_FLAG_KEY; 299 300 /* -1 instructs the next call to read_packet() to read the next frame */ 301 bink->current_track = -1; 302 303 return 0; 304} 305 306static int read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags) 307{ 308 BinkDemuxContext *bink = s->priv_data; 309 AVStream *vst = s->streams[0]; 310 FFStream *const vsti = ffstream(vst); 311 int64_t ret; 312 313 if (!(s->pb->seekable & AVIO_SEEKABLE_NORMAL)) 314 return -1; 315 316 /* seek to the first frame */ 317 ret = avio_seek(s->pb, vsti->index_entries[0].pos + bink->smush_size, SEEK_SET); 318 if (ret < 0) 319 return ret; 320 321 bink->video_pts = 0; 322 memset(bink->audio_pts, 0, sizeof(bink->audio_pts)); 323 bink->current_track = -1; 324 return 0; 325} 326 327const AVInputFormat ff_bink_demuxer = { 328 .name = "bink", 329 .long_name = NULL_IF_CONFIG_SMALL("Bink"), 330 .priv_data_size = sizeof(BinkDemuxContext), 331 .read_probe = probe, 332 .read_header = read_header, 333 .read_packet = read_packet, 334 .read_seek = read_seek, 335 .flags = AVFMT_SHOW_IDS, 336}; 337