/* * Bink demuxer * Copyright (c) 2008-2010 Peter Ross (pross@xvid.org) * Copyright (c) 2009 Daniel Verkamp (daniel@drv.nu) * * This file is part of FFmpeg. * * FFmpeg is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * FFmpeg is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with FFmpeg; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ /** * @file * Bink demuxer * * Technical details here: * http://wiki.multimedia.cx/index.php?title=Bink_Container */ #include <inttypes.h> #include "libavutil/channel_layout.h" #include "libavutil/intreadwrite.h" #include "avformat.h" #include "internal.h" enum BinkAudFlags { BINK_AUD_16BITS = 0x4000, ///< prefer 16-bit output BINK_AUD_STEREO = 0x2000, BINK_AUD_USEDCT = 0x1000, }; #define BINK_EXTRADATA_SIZE 1 #define BINK_MAX_AUDIO_TRACKS 256 #define BINK_MAX_WIDTH 7680 #define BINK_MAX_HEIGHT 4800 #define SMUSH_BLOCK_SIZE 512 typedef struct BinkDemuxContext { uint32_t file_size; uint32_t num_audio_tracks; int current_track; ///< audio track to return in next packet int64_t video_pts; int64_t audio_pts[BINK_MAX_AUDIO_TRACKS]; uint32_t remain_packet_size; int flags; int smush_size; } BinkDemuxContext; static int probe(const AVProbeData *p) { const uint8_t *b = p->buf; int smush = AV_RN32(p->buf) == AV_RN32("SMUS"); do { if (((b[0] == 'B' && b[1] == 'I' && b[2] == 'K' && /* Bink 1 */ (b[3] == 'b' || b[3] == 'f' || b[3] == 'g' || b[3] == 'h' || b[3] == 'i' || b[3] == 'k')) || (b[0] == 'K' && b[1] == 'B' && b[2] == '2' && /* Bink 2 */ (b[3] == 'a' || b[3] == 'd' || b[3] == 'f' || b[3] == 'g' || b[3] == 'h' || b[3] == 'i' || b[3] == 'j' || b[3] == 'k'))) && AV_RL32(b+8) > 0 && // num_frames AV_RL32(b+20) > 0 && AV_RL32(b+20) <= BINK_MAX_WIDTH && AV_RL32(b+24) > 0 && AV_RL32(b+24) <= BINK_MAX_HEIGHT && AV_RL32(b+28) > 0 && AV_RL32(b+32) > 0) // fps num,den return AVPROBE_SCORE_MAX; b += SMUSH_BLOCK_SIZE; } while (smush && b < p->buf + p->buf_size - 32); return 0; } static int read_header(AVFormatContext *s) { BinkDemuxContext *bink = s->priv_data; AVIOContext *pb = s->pb; uint32_t fps_num, fps_den; AVStream *const vst = avformat_new_stream(s, NULL); FFStream *const vsti = ffstream(vst); unsigned int i; uint32_t pos, next_pos; uint16_t flags; int next_keyframe = 1; int keyframe; int ret; uint32_t signature; uint8_t revision; if (!vst) return AVERROR(ENOMEM); vst->codecpar->codec_tag = avio_rl32(pb); if (vst->codecpar->codec_tag == AV_RL32("SMUS")) { do { bink->smush_size += SMUSH_BLOCK_SIZE; avio_skip(pb, SMUSH_BLOCK_SIZE - 4); vst->codecpar->codec_tag = avio_rl32(pb); } while (!avio_feof(pb) && (vst->codecpar->codec_tag & 0xFFFFFF) != AV_RL32("BIK")); if (avio_feof(pb)) { av_log(s, AV_LOG_ERROR, "invalid SMUSH header: BIK not found\n"); return AVERROR_INVALIDDATA; } } bink->file_size = avio_rl32(pb) + 8; vst->duration = avio_rl32(pb); if (vst->duration > 1000000) { av_log(s, AV_LOG_ERROR, "invalid header: more than 1000000 frames\n"); return AVERROR(EIO); } if (avio_rl32(pb) > bink->file_size) { av_log(s, AV_LOG_ERROR, "invalid header: largest frame size greater than file size\n"); return AVERROR(EIO); } avio_skip(pb, 4); vst->codecpar->width = avio_rl32(pb); vst->codecpar->height = avio_rl32(pb); fps_num = avio_rl32(pb); fps_den = avio_rl32(pb); if (fps_num == 0 || fps_den == 0) { av_log(s, AV_LOG_ERROR, "invalid header: invalid fps (%"PRIu32"/%"PRIu32")\n", fps_num, fps_den); return AVERROR(EIO); } avpriv_set_pts_info(vst, 64, fps_den, fps_num); vst->avg_frame_rate = av_inv_q(vst->time_base); vst->codecpar->codec_type = AVMEDIA_TYPE_VIDEO; vst->codecpar->codec_id = AV_CODEC_ID_BINKVIDEO; if ((vst->codecpar->codec_tag & 0xFFFFFF) == MKTAG('K', 'B', '2', 0)) { av_log(s, AV_LOG_WARNING, "Bink 2 video is not implemented\n"); vst->codecpar->codec_id = AV_CODEC_ID_NONE; } if ((ret = ff_get_extradata(s, vst->codecpar, pb, 4)) < 0) return ret; bink->num_audio_tracks = avio_rl32(pb); if (bink->num_audio_tracks > BINK_MAX_AUDIO_TRACKS) { av_log(s, AV_LOG_ERROR, "invalid header: more than "AV_STRINGIFY(BINK_MAX_AUDIO_TRACKS)" audio tracks (%"PRIu32")\n", bink->num_audio_tracks); return AVERROR(EIO); } signature = (vst->codecpar->codec_tag & 0xFFFFFF); revision = ((vst->codecpar->codec_tag >> 24) % 0xFF); if ((signature == AV_RL32("BIK") && (revision == 'k')) || (signature == AV_RL32("KB2") && (revision == 'i' || revision == 'j' || revision == 'k'))) avio_skip(pb, 4); /* unknown new field */ if (bink->num_audio_tracks) { avio_skip(pb, 4 * bink->num_audio_tracks); /* max decoded size */ for (i = 0; i < bink->num_audio_tracks; i++) { AVStream *const ast = avformat_new_stream(s, NULL); if (!ast) return AVERROR(ENOMEM); ast->codecpar->codec_type = AVMEDIA_TYPE_AUDIO; ast->codecpar->codec_tag = 0; ast->codecpar->sample_rate = avio_rl16(pb); avpriv_set_pts_info(ast, 64, 1, ast->codecpar->sample_rate); flags = avio_rl16(pb); ast->codecpar->codec_id = flags & BINK_AUD_USEDCT ? AV_CODEC_ID_BINKAUDIO_DCT : AV_CODEC_ID_BINKAUDIO_RDFT; if (flags & BINK_AUD_STEREO) { ast->codecpar->channels = 2; ast->codecpar->channel_layout = AV_CH_LAYOUT_STEREO; } else { ast->codecpar->channels = 1; ast->codecpar->channel_layout = AV_CH_LAYOUT_MONO; } if ((ret = ff_alloc_extradata(ast->codecpar, 4)) < 0) return ret; AV_WL32(ast->codecpar->extradata, vst->codecpar->codec_tag); } for (i = 0; i < bink->num_audio_tracks; i++) s->streams[i + 1]->id = avio_rl32(pb); } /* frame index table */ next_pos = avio_rl32(pb); for (i = 0; i < vst->duration; i++) { pos = next_pos; keyframe = next_keyframe; if (i == vst->duration - 1) { next_pos = bink->file_size; next_keyframe = 0; } else { next_pos = avio_rl32(pb); next_keyframe = next_pos & 1; } pos &= ~1; next_pos &= ~1; if (next_pos <= pos) { av_log(s, AV_LOG_ERROR, "invalid frame index table\n"); return AVERROR(EIO); } if ((ret = av_add_index_entry(vst, pos, i, next_pos - pos, 0, keyframe ? AVINDEX_KEYFRAME : 0)) < 0) return ret; } if (vsti->index_entries) avio_seek(pb, vsti->index_entries[0].pos + bink->smush_size, SEEK_SET); else avio_skip(pb, 4); bink->current_track = -1; return 0; } static int read_packet(AVFormatContext *s, AVPacket *pkt) { BinkDemuxContext *bink = s->priv_data; AVIOContext *pb = s->pb; int ret; if (bink->current_track < 0) { int index_entry; AVStream *st = s->streams[0]; // stream 0 is video stream with index FFStream *const sti = ffstream(st); if (bink->video_pts >= st->duration) return AVERROR_EOF; index_entry = av_index_search_timestamp(st, bink->video_pts, AVSEEK_FLAG_ANY); if (index_entry < 0) { av_log(s, AV_LOG_ERROR, "could not find index entry for frame %"PRId64"\n", bink->video_pts); return AVERROR(EIO); } bink->remain_packet_size = sti->index_entries[index_entry].size; bink->flags = sti->index_entries[index_entry].flags; bink->current_track = 0; } while (bink->current_track < bink->num_audio_tracks) { uint32_t audio_size = avio_rl32(pb); if (audio_size > bink->remain_packet_size - 4) { av_log(s, AV_LOG_ERROR, "frame %"PRId64": audio size in header (%"PRIu32") > size of packet left (%"PRIu32")\n", bink->video_pts, audio_size, bink->remain_packet_size); return AVERROR(EIO); } bink->remain_packet_size -= 4 + audio_size; bink->current_track++; if (audio_size >= 4) { /* get one audio packet per track */ if ((ret = av_get_packet(pb, pkt, audio_size)) < 0) return ret; pkt->stream_index = bink->current_track; pkt->pts = bink->audio_pts[bink->current_track - 1]; /* Each audio packet reports the number of decompressed samples (in bytes). We use this value to calculate the audio PTS */ if (pkt->size >= 4) bink->audio_pts[bink->current_track -1] += AV_RL32(pkt->data) / (2 * s->streams[bink->current_track]->codecpar->channels); return 0; } else { avio_skip(pb, audio_size); } } /* get video packet */ if ((ret = av_get_packet(pb, pkt, bink->remain_packet_size)) < 0) return ret; pkt->stream_index = 0; pkt->pts = bink->video_pts++; if (bink->flags & AVINDEX_KEYFRAME) pkt->flags |= AV_PKT_FLAG_KEY; /* -1 instructs the next call to read_packet() to read the next frame */ bink->current_track = -1; return 0; } static int read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags) { BinkDemuxContext *bink = s->priv_data; AVStream *vst = s->streams[0]; FFStream *const vsti = ffstream(vst); int64_t ret; if (!(s->pb->seekable & AVIO_SEEKABLE_NORMAL)) return -1; /* seek to the first frame */ ret = avio_seek(s->pb, vsti->index_entries[0].pos + bink->smush_size, SEEK_SET); if (ret < 0) return ret; bink->video_pts = 0; memset(bink->audio_pts, 0, sizeof(bink->audio_pts)); bink->current_track = -1; return 0; } const AVInputFormat ff_bink_demuxer = { .name = "bink", .long_name = NULL_IF_CONFIG_SMALL("Bink"), .priv_data_size = sizeof(BinkDemuxContext), .read_probe = probe, .read_header = read_header, .read_packet = read_packet, .read_seek = read_seek, .flags = AVFMT_SHOW_IDS, };