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100 lines
2.6 KiB
100 lines
2.6 KiB
/* |
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* Copyright (c) 2021 Paul B Mahol |
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* |
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* This file is part of FFmpeg. |
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* |
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* FFmpeg is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* FFmpeg is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with FFmpeg; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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#include "libavutil/intreadwrite.h" |
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#include "avformat.h" |
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#include "internal.h" |
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static int binka_probe(const AVProbeData *p) |
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{ |
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if (AV_RB32(p->buf) == MKBETAG('1', 'F', 'C', 'B') && |
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(p->buf[4] == 1 || p->buf[4] == 2)) |
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return AVPROBE_SCORE_MAX; |
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return 0; |
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} |
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static int binka_read_header(AVFormatContext *s) |
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{ |
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AVIOContext *pb = s->pb; |
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AVStream *st; |
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int entries, offset; |
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st = avformat_new_stream(s, NULL); |
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if (!st) |
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return AVERROR(ENOMEM); |
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avio_skip(pb, 5); |
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st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO; |
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st->codecpar->codec_id = AV_CODEC_ID_BINKAUDIO_DCT; |
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st->codecpar->channels = avio_r8(pb); |
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st->codecpar->sample_rate = avio_rl16(pb); |
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st->duration = avio_rl32(pb); |
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avio_skip(pb, 8); |
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entries = avio_rl16(pb); |
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offset = entries * 2 + 2; |
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avio_skip(pb, offset); |
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avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate); |
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return 0; |
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} |
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static int binka_read_packet(AVFormatContext *s, AVPacket *pkt) |
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{ |
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AVIOContext *pb = s->pb; |
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AVStream *st = s->streams[0]; |
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int64_t pos; |
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int pkt_size; |
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int ret; |
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if (avio_feof(pb)) |
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return AVERROR_EOF; |
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pos = avio_tell(pb); |
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avio_skip(pb, 2); |
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pkt_size = avio_rl16(pb) + 4; |
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if (pkt_size <= 4) |
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return AVERROR(EIO); |
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ret = av_new_packet(pkt, pkt_size); |
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if (ret < 0) |
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return ret; |
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avio_read(pb, pkt->data + 4, pkt_size - 4); |
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AV_WL32(pkt->data, pkt_size); |
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pkt->pos = pos; |
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pkt->stream_index = 0; |
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pkt->duration = av_get_audio_frame_duration2(st->codecpar, 0); |
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return 0; |
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} |
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AVInputFormat ff_binka_demuxer = { |
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.name = "binka", |
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.long_name = NULL_IF_CONFIG_SMALL("Bink Audio"), |
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.read_probe = binka_probe, |
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.read_header = binka_read_header, |
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.read_packet = binka_read_packet, |
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.flags = AVFMT_GENERIC_INDEX, |
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.extensions = "binka", |
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};
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