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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 4349 | Serge | 1 | /* |
| 2 | * ADP demuxer |
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| 3 | * Copyright (c) 2013 James Almer |
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| 4 | * |
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| 5 | * This file is part of FFmpeg. |
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| 6 | * |
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| 7 | * FFmpeg is free software; you can redistribute it and/or |
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| 8 | * modify it under the terms of the GNU Lesser General Public |
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| 9 | * License as published by the Free Software Foundation; either |
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| 10 | * version 2.1 of the License, or (at your option) any later version. |
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| 11 | * |
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| 12 | * FFmpeg is distributed in the hope that it will be useful, |
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| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 15 | * Lesser General Public License for more details. |
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| 16 | * |
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| 17 | * You should have received a copy of the GNU Lesser General Public |
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| 18 | * License along with FFmpeg; if not, write to the Free Software |
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| 19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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| 20 | */ |
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| 21 | |||
| 22 | #include "libavutil/channel_layout.h" |
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| 23 | #include "libavutil/intreadwrite.h" |
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| 24 | #include "avformat.h" |
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| 25 | #include "internal.h" |
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| 26 | |||
| 27 | static int adp_probe(AVProbeData *p) |
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| 28 | { |
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| 29 | int i; |
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| 30 | |||
| 31 | if (p->buf_size < 32) |
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| 32 | return 0; |
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| 33 | |||
| 34 | for (i = 0; i < p->buf_size - 3; i+=32) |
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| 35 | if (p->buf[i] != p->buf[i+2] || p->buf[i+1] != p->buf[i+3]) |
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| 36 | return 0; |
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| 37 | |||
| 38 | return p->buf_size < 260 ? 1 : AVPROBE_SCORE_MAX / 4; |
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| 39 | } |
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| 40 | |||
| 41 | static int adp_read_header(AVFormatContext *s) |
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| 42 | { |
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| 43 | AVStream *st; |
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| 44 | |||
| 45 | st = avformat_new_stream(s, NULL); |
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| 46 | if (!st) |
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| 47 | return AVERROR(ENOMEM); |
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| 48 | |||
| 49 | st->codec->codec_type = AVMEDIA_TYPE_AUDIO; |
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| 50 | st->codec->codec_id = AV_CODEC_ID_ADPCM_DTK; |
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| 51 | st->codec->channel_layout = AV_CH_LAYOUT_STEREO; |
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| 52 | st->codec->channels = 2; |
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| 53 | st->codec->sample_rate = 48000; |
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| 54 | st->start_time = 0; |
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| 55 | if (s->pb->seekable) |
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| 56 | st->duration = av_get_audio_frame_duration(st->codec, avio_size(s->pb)); |
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| 57 | |||
| 58 | avpriv_set_pts_info(st, 64, 1, st->codec->sample_rate); |
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| 59 | |||
| 60 | return 0; |
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| 61 | } |
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| 62 | |||
| 63 | static int adp_read_packet(AVFormatContext *s, AVPacket *pkt) |
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| 64 | { |
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| 65 | int ret, size = 1024; |
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| 66 | |||
| 67 | if (url_feof(s->pb)) |
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| 68 | return AVERROR_EOF; |
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| 69 | |||
| 70 | ret = av_get_packet(s->pb, pkt, size); |
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| 71 | |||
| 72 | if (ret != size) { |
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| 73 | if (ret < 0) { |
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| 74 | av_free_packet(pkt); |
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| 75 | return ret; |
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| 76 | } |
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| 77 | av_shrink_packet(pkt, ret); |
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| 78 | } |
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| 79 | pkt->stream_index = 0; |
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| 80 | |||
| 81 | return ret; |
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| 82 | } |
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| 83 | |||
| 84 | AVInputFormat ff_adp_demuxer = { |
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| 85 | .name = "adp", |
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| 86 | .long_name = NULL_IF_CONFIG_SMALL("ADP"), |
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| 87 | .read_probe = adp_probe, |
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| 88 | .read_header = adp_read_header, |
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| 89 | .read_packet = adp_read_packet, |
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| 90 | .extensions = "adp,dtk", |
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| 91 | }; |