| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | /* | ||
| 2 | * SDR2 demuxer | ||
| 3 | * Copyright (c) 2014 Paul B Mahol | ||
| 4 | * | ||
| 5 | * This file is part of FFmpeg. | ||
| 6 | * | ||
| 7 | * FFmpeg is free software; you can redistribute it and/or | ||
| 8 | * modify it under the terms of the GNU Lesser General Public | ||
| 9 | * License as published by the Free Software Foundation; either | ||
| 10 | * version 2.1 of the License, or (at your option) any later version. | ||
| 11 | * | ||
| 12 | * FFmpeg is distributed in the hope that it will be useful, | ||
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
| 15 | * Lesser General Public License for more details. | ||
| 16 | * | ||
| 17 | * You should have received a copy of the GNU Lesser General Public | ||
| 18 | * License along with FFmpeg; if not, write to the Free Software | ||
| 19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | ||
| 20 | */ | ||
| 21 | |||
| 22 | #include "libavutil/intreadwrite.h" | ||
| 23 | #include "avformat.h" | ||
| 24 | #include "demux.h" | ||
| 25 | #include "internal.h" | ||
| 26 | |||
| 27 | 7186 | static int sdr2_probe(const AVProbeData *p) | |
| 28 | { | ||
| 29 |
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7186 | if (AV_RL32(p->buf) != MKTAG('S', 'R', 'A', 1)) |
| 30 | 7186 | return 0; | |
| 31 | |||
| 32 | ✗ | return AVPROBE_SCORE_EXTENSION; | |
| 33 | } | ||
| 34 | |||
| 35 | #define FIRST 0xA8 | ||
| 36 | |||
| 37 | ✗ | static int sdr2_read_header(AVFormatContext *s) | |
| 38 | { | ||
| 39 | AVStream *st, *ast; | ||
| 40 | |||
| 41 | ✗ | ast = avformat_new_stream(s, 0); | |
| 42 | ✗ | if (!ast) | |
| 43 | ✗ | return AVERROR(ENOMEM); | |
| 44 | |||
| 45 | ✗ | st = avformat_new_stream(s, 0); | |
| 46 | ✗ | if (!st) | |
| 47 | ✗ | return AVERROR(ENOMEM); | |
| 48 | |||
| 49 | ✗ | avio_skip(s->pb, 20); | |
| 50 | ✗ | avpriv_set_pts_info(st, 64, 1, avio_rl32(s->pb)); | |
| 51 | ✗ | st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO; | |
| 52 | ✗ | st->codecpar->width = avio_rl32(s->pb); | |
| 53 | ✗ | st->codecpar->height = avio_rl32(s->pb); | |
| 54 | ✗ | st->codecpar->codec_id = AV_CODEC_ID_H264; | |
| 55 | ✗ | ffstream(st)->need_parsing = AVSTREAM_PARSE_FULL; | |
| 56 | |||
| 57 | ✗ | ast->codecpar->codec_type = AVMEDIA_TYPE_AUDIO; | |
| 58 | ✗ | ast->codecpar->ch_layout.nb_channels = 1; | |
| 59 | ✗ | ast->codecpar->sample_rate = 8000; | |
| 60 | ✗ | ast->codecpar->codec_id = AV_CODEC_ID_PCM_S16LE; | |
| 61 | ✗ | avpriv_set_pts_info(ast, 64, 1, 8000); | |
| 62 | |||
| 63 | ✗ | avio_seek(s->pb, FIRST, SEEK_SET); | |
| 64 | |||
| 65 | ✗ | return 0; | |
| 66 | } | ||
| 67 | |||
| 68 | static const uint8_t header[24] = { | ||
| 69 | 0x00, 0x00, 0x00, 0x01, 0x67, 0x42, 0x00, 0x1e, | ||
| 70 | 0xa6, 0x80, 0xb0, 0x7e, 0x40, 0x00, 0x00, 0x00, | ||
| 71 | 0x01, 0x68, 0xce, 0x38, 0x80, 0x00, 0x00, 0x00 | ||
| 72 | }; | ||
| 73 | |||
| 74 | ✗ | static int sdr2_read_packet(AVFormatContext *s, AVPacket *pkt) | |
| 75 | { | ||
| 76 | int64_t pos; | ||
| 77 | unsigned next; | ||
| 78 | ✗ | int flags, ret = 0, is_video; | |
| 79 | |||
| 80 | ✗ | pos = avio_tell(s->pb); | |
| 81 | |||
| 82 | ✗ | flags = avio_rl32(s->pb); | |
| 83 | ✗ | avio_skip(s->pb, 4); | |
| 84 | |||
| 85 | ✗ | next = avio_rl32(s->pb); | |
| 86 | ✗ | if (next <= 52) | |
| 87 | ✗ | return AVERROR_INVALIDDATA; | |
| 88 | |||
| 89 | ✗ | avio_skip(s->pb, 6); | |
| 90 | ✗ | is_video = avio_rl32(s->pb); | |
| 91 | ✗ | avio_skip(s->pb, 30); | |
| 92 | |||
| 93 | ✗ | if (pos == FIRST) { | |
| 94 | ✗ | if ((ret = av_new_packet(pkt, next - 52 + 24)) < 0) | |
| 95 | ✗ | return ret; | |
| 96 | ✗ | memcpy(pkt->data, header, 24); | |
| 97 | ✗ | ret = avio_read(s->pb, pkt->data + 24, next - 52); | |
| 98 | ✗ | if (ret < 0) { | |
| 99 | ✗ | return ret; | |
| 100 | } | ||
| 101 | ✗ | av_shrink_packet(pkt, ret + 24); | |
| 102 | } else { | ||
| 103 | ✗ | ret = av_get_packet(s->pb, pkt, next - 52); | |
| 104 | } | ||
| 105 | ✗ | pkt->stream_index = !!is_video; | |
| 106 | ✗ | pkt->pos = pos; | |
| 107 | ✗ | if (flags & (1 << 12)) | |
| 108 | ✗ | pkt->flags |= AV_PKT_FLAG_KEY; | |
| 109 | |||
| 110 | ✗ | return ret; | |
| 111 | } | ||
| 112 | |||
| 113 | const FFInputFormat ff_sdr2_demuxer = { | ||
| 114 | .p.name = "sdr2", | ||
| 115 | .p.long_name = NULL_IF_CONFIG_SMALL("SDR2"), | ||
| 116 | .p.extensions= "sdr2", | ||
| 117 | .p.flags = AVFMT_GENERIC_INDEX, | ||
| 118 | .read_probe = sdr2_probe, | ||
| 119 | .read_header = sdr2_read_header, | ||
| 120 | .read_packet = sdr2_read_packet, | ||
| 121 | }; | ||
| 122 |