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 "internal.h" 37 38enum BinkAudFlags { 39 BINK_AUD_16BITS = 0x4000, ///< prefer 16-bit output 40 BINK_AUD_STEREO = 0x2000, 41 BINK_AUD_USEDCT = 0x1000, 42}; 43 44#define BINK_EXTRADATA_SIZE 1 45#define BINK_MAX_AUDIO_TRACKS 256 46#define BINK_MAX_WIDTH 7680 47#define BINK_MAX_HEIGHT 4800 48 49typedef struct { 50 uint32_t file_size; 51 52 uint32_t num_audio_tracks; 53 int current_track; ///< audio track to return in next packet 54 int64_t video_pts; 55 int64_t audio_pts[BINK_MAX_AUDIO_TRACKS]; 56 57 uint32_t remain_packet_size; 58} BinkDemuxContext; 59 60static int probe(AVProbeData *p) 61{ 62 const uint8_t *b = p->buf; 63 64 if (((b[0] == 'B' && b[1] == 'I' && b[2] == 'K' && 65 (b[3] == 'b' || b[3] == 'f' || b[3] == 'g' || b[3] == 'h' || b[3] == 'i')) || 66 (b[0] == 'K' && b[1] == 'B' && b[2] == '2' && /* Bink 2 */ 67 (b[3] == 'a' || b[3] == 'd' || b[3] == 'f' || b[3] == 'g'))) && 68 AV_RL32(b+8) > 0 && // num_frames 69 AV_RL32(b+20) > 0 && AV_RL32(b+20) <= BINK_MAX_WIDTH && 70 AV_RL32(b+24) > 0 && AV_RL32(b+24) <= BINK_MAX_HEIGHT && 71 AV_RL32(b+28) > 0 && AV_RL32(b+32) > 0) // fps num,den 72 return AVPROBE_SCORE_MAX; 73 return 0; 74} 75 76static int read_header(AVFormatContext *s) 77{ 78 BinkDemuxContext *bink = s->priv_data; 79 AVIOContext *pb = s->pb; 80 uint32_t fps_num, fps_den; 81 AVStream *vst, *ast; 82 unsigned int i; 83 uint32_t pos, next_pos; 84 uint16_t flags; 85 int keyframe; 86 int ret; 87 88 vst = avformat_new_stream(s, NULL); 89 if (!vst) 90 return AVERROR(ENOMEM); 91 92 vst->codec->codec_tag = avio_rl32(pb); 93 94 bink->file_size = avio_rl32(pb) + 8; 95 vst->duration = avio_rl32(pb); 96 97 if (vst->duration > 1000000) { 98 av_log(s, AV_LOG_ERROR, "invalid header: more than 1000000 frames\n"); 99 return AVERROR(EIO); 100 } 101 102 if (avio_rl32(pb) > bink->file_size) { 103 av_log(s, AV_LOG_ERROR, 104 "invalid header: largest frame size greater than file size\n"); 105 return AVERROR(EIO); 106 } 107 108 avio_skip(pb, 4); 109 110 vst->codec->width = avio_rl32(pb); 111 vst->codec->height = avio_rl32(pb); 112 113 fps_num = avio_rl32(pb); 114 fps_den = avio_rl32(pb); 115 if (fps_num == 0 || fps_den == 0) { 116 av_log(s, AV_LOG_ERROR, 117 "invalid header: invalid fps (%"PRIu32"/%"PRIu32")\n", 118 fps_num, fps_den); 119 return AVERROR(EIO); 120 } 121 avpriv_set_pts_info(vst, 64, fps_den, fps_num); 122 vst->avg_frame_rate = av_inv_q(vst->time_base); 123 124 vst->codec->codec_type = AVMEDIA_TYPE_VIDEO; 125 vst->codec->codec_id = AV_CODEC_ID_BINKVIDEO; 126 127 if ((vst->codec->codec_tag & 0xFFFFFF) == MKTAG('K', 'B', '2', 0)) { 128 av_log(s, AV_LOG_WARNING, "Bink 2 video is not implemented\n"); 129 vst->codec->codec_id = AV_CODEC_ID_NONE; 130 } 131 132 if (ff_get_extradata(vst->codec, pb, 4) < 0) 133 return AVERROR(ENOMEM); 134 135 bink->num_audio_tracks = avio_rl32(pb); 136 137 if (bink->num_audio_tracks > BINK_MAX_AUDIO_TRACKS) { 138 av_log(s, AV_LOG_ERROR, 139 "invalid header: more than "AV_STRINGIFY(BINK_MAX_AUDIO_TRACKS)" audio tracks (%"PRIu32")\n", 140 bink->num_audio_tracks); 141 return AVERROR(EIO); 142 } 143 144 if (bink->num_audio_tracks) { 145 avio_skip(pb, 4 * bink->num_audio_tracks); 146 147 for (i = 0; i < bink->num_audio_tracks; i++) { 148 ast = avformat_new_stream(s, NULL); 149 if (!ast) 150 return AVERROR(ENOMEM); 151 ast->codec->codec_type = AVMEDIA_TYPE_AUDIO; 152 ast->codec->codec_tag = 0; 153 ast->codec->sample_rate = avio_rl16(pb); 154 avpriv_set_pts_info(ast, 64, 1, ast->codec->sample_rate); 155 flags = avio_rl16(pb); 156 ast->codec->codec_id = flags & BINK_AUD_USEDCT ? 157 AV_CODEC_ID_BINKAUDIO_DCT : AV_CODEC_ID_BINKAUDIO_RDFT; 158 if (flags & BINK_AUD_STEREO) { 159 ast->codec->channels = 2; 160 ast->codec->channel_layout = AV_CH_LAYOUT_STEREO; 161 } else { 162 ast->codec->channels = 1; 163 ast->codec->channel_layout = AV_CH_LAYOUT_MONO; 164 } 165 if (ff_alloc_extradata(ast->codec, 4)) 166 return AVERROR(ENOMEM); 167 AV_WL32(ast->codec->extradata, vst->codec->codec_tag); 168 } 169 170 for (i = 0; i < bink->num_audio_tracks; i++) 171 s->streams[i + 1]->id = avio_rl32(pb); 172 } 173 174 /* frame index table */ 175 next_pos = avio_rl32(pb); 176 for (i = 0; i < vst->duration; i++) { 177 pos = next_pos; 178 if (i == vst->duration - 1) { 179 next_pos = bink->file_size; 180 keyframe = 0; 181 } else { 182 next_pos = avio_rl32(pb); 183 keyframe = pos & 1; 184 } 185 pos &= ~1; 186 next_pos &= ~1; 187 188 if (next_pos <= pos) { 189 av_log(s, AV_LOG_ERROR, "invalid frame index table\n"); 190 return AVERROR(EIO); 191 } 192 if ((ret = av_add_index_entry(vst, pos, i, next_pos - pos, 0, 193 keyframe ? AVINDEX_KEYFRAME : 0)) < 0) 194 return ret; 195 } 196 197 avio_seek(pb, vst->index_entries[0].pos, SEEK_SET); 198 199 bink->current_track = -1; 200 return 0; 201} 202 203static int read_packet(AVFormatContext *s, AVPacket *pkt) 204{ 205 BinkDemuxContext *bink = s->priv_data; 206 AVIOContext *pb = s->pb; 207 int ret; 208 209 if (bink->current_track < 0) { 210 int index_entry; 211 AVStream *st = s->streams[0]; // stream 0 is video stream with index 212 213 if (bink->video_pts >= st->duration) 214 return AVERROR_EOF; 215 216 index_entry = av_index_search_timestamp(st, bink->video_pts, 217 AVSEEK_FLAG_ANY); 218 if (index_entry < 0) { 219 av_log(s, AV_LOG_ERROR, 220 "could not find index entry for frame %"PRId64"\n", 221 bink->video_pts); 222 return AVERROR(EIO); 223 } 224 225 bink->remain_packet_size = st->index_entries[index_entry].size; 226 bink->current_track = 0; 227 } 228 229 while (bink->current_track < bink->num_audio_tracks) { 230 uint32_t audio_size = avio_rl32(pb); 231 if (audio_size > bink->remain_packet_size - 4) { 232 av_log(s, AV_LOG_ERROR, 233 "frame %"PRId64": audio size in header (%"PRIu32") > size of packet left (%"PRIu32")\n", 234 bink->video_pts, audio_size, bink->remain_packet_size); 235 return AVERROR(EIO); 236 } 237 bink->remain_packet_size -= 4 + audio_size; 238 bink->current_track++; 239 if (audio_size >= 4) { 240 /* get one audio packet per track */ 241 if ((ret = av_get_packet(pb, pkt, audio_size)) < 0) 242 return ret; 243 pkt->stream_index = bink->current_track; 244 pkt->pts = bink->audio_pts[bink->current_track - 1]; 245 246 /* Each audio packet reports the number of decompressed samples 247 (in bytes). We use this value to calcuate the audio PTS */ 248 if (pkt->size >= 4) 249 bink->audio_pts[bink->current_track -1] += 250 AV_RL32(pkt->data) / (2 * s->streams[bink->current_track]->codec->channels); 251 return 0; 252 } else { 253 avio_skip(pb, audio_size); 254 } 255 } 256 257 /* get video packet */ 258 if ((ret = av_get_packet(pb, pkt, bink->remain_packet_size)) < 0) 259 return ret; 260 pkt->stream_index = 0; 261 pkt->pts = bink->video_pts++; 262 pkt->flags |= AV_PKT_FLAG_KEY; 263 264 /* -1 instructs the next call to read_packet() to read the next frame */ 265 bink->current_track = -1; 266 267 return 0; 268} 269 270static int read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags) 271{ 272 BinkDemuxContext *bink = s->priv_data; 273 AVStream *vst = s->streams[0]; 274 275 if (!s->pb->seekable) 276 return -1; 277 278 /* seek to the first frame */ 279 if (avio_seek(s->pb, vst->index_entries[0].pos, SEEK_SET) < 0) 280 return -1; 281 282 bink->video_pts = 0; 283 memset(bink->audio_pts, 0, sizeof(bink->audio_pts)); 284 bink->current_track = -1; 285 return 0; 286} 287 288AVInputFormat ff_bink_demuxer = { 289 .name = "bink", 290 .long_name = NULL_IF_CONFIG_SMALL("Bink"), 291 .priv_data_size = sizeof(BinkDemuxContext), 292 .read_probe = probe, 293 .read_header = read_header, 294 .read_packet = read_packet, 295 .read_seek = read_seek, 296 .flags = AVFMT_SHOW_IDS, 297}; 298