/* * Bink demuxer * Copyright (c) 2008-2010 Peter Ross (pross@xvid.org) * Copyright (c) 2009 Daniel Verkamp (daniel@drv.nu) * * This file is part of Libav. * * Libav 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. * * Libav 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 Libav; 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 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; } BinkDemuxContext; static int probe(AVProbeData *p) { const uint8_t *b = p->buf; if ( b[0] == 'B' && b[1] == 'I' && b[2] == 'K' && (b[3] == 'b' || b[3] == 'f' || b[3] == 'g' || b[3] == 'h' || b[3] == 'i') && 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; return 0; } static int read_header(AVFormatContext *s) { BinkDemuxContext *bink = s->priv_data; AVIOContext *pb = s->pb; uint32_t fps_num, fps_den; AVStream *vst, *ast; unsigned int i; uint32_t pos, next_pos; uint16_t flags; int keyframe; vst = avformat_new_stream(s, NULL); if (!vst) return AVERROR(ENOMEM); vst->codecpar->codec_tag = avio_rl32(pb); 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; vst->codecpar->extradata = av_mallocz(4 + AV_INPUT_BUFFER_PADDING_SIZE); if (!vst->codecpar->extradata) return AVERROR(ENOMEM); vst->codecpar->extradata_size = 4; avio_read(pb, vst->codecpar->extradata, 4); 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); } if (bink->num_audio_tracks) { avio_skip(pb, 4 * bink->num_audio_tracks); for (i = 0; i < bink->num_audio_tracks; i++) { 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; } ast->codecpar->extradata = av_mallocz(4 + AV_INPUT_BUFFER_PADDING_SIZE); if (!ast->codecpar->extradata) return AVERROR(ENOMEM); ast->codecpar->extradata_size = 4; 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; if (i == vst->duration - 1) { next_pos = bink->file_size; keyframe = 0; } else { next_pos = avio_rl32(pb); keyframe = 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); } av_add_index_entry(vst, pos, i, next_pos - pos, 0, keyframe ? AVINDEX_KEYFRAME : 0); } 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 if (bink->video_pts >= st->duration) return AVERROR(EIO); 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 = st->index_entries[index_entry].size; 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++; 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]; if (!(s->pb->seekable & AVIO_SEEKABLE_NORMAL)) return -1; /* seek to the first frame */ if (avio_seek(s->pb, vst->index_entries[0].pos, SEEK_SET) < 0) return -1; bink->video_pts = 0; memset(bink->audio_pts, 0, sizeof(bink->audio_pts)); bink->current_track = -1; return 0; } 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, };