| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | /* | ||
| 2 | * iLBC storage file format | ||
| 3 | * Copyright (c) 2012 Martin Storsjo | ||
| 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 "config_components.h" | ||
| 23 | |||
| 24 | #include "avformat.h" | ||
| 25 | #include "demux.h" | ||
| 26 | #include "internal.h" | ||
| 27 | #include "mux.h" | ||
| 28 | #include "rawenc.h" | ||
| 29 | |||
| 30 | static const char mode20_header[] = "#!iLBC20\n"; | ||
| 31 | static const char mode30_header[] = "#!iLBC30\n"; | ||
| 32 | |||
| 33 | ✗ | static int ilbc_write_header(AVFormatContext *s) | |
| 34 | { | ||
| 35 | ✗ | AVIOContext *pb = s->pb; | |
| 36 | ✗ | AVCodecParameters *par = s->streams[0]->codecpar; | |
| 37 | |||
| 38 | ✗ | if (par->block_align == 50) { | |
| 39 | ✗ | avio_write(pb, mode30_header, sizeof(mode30_header) - 1); | |
| 40 | ✗ | } else if (par->block_align == 38) { | |
| 41 | ✗ | avio_write(pb, mode20_header, sizeof(mode20_header) - 1); | |
| 42 | } else { | ||
| 43 | ✗ | av_log(s, AV_LOG_ERROR, "Unsupported mode\n"); | |
| 44 | ✗ | return AVERROR(EINVAL); | |
| 45 | } | ||
| 46 | ✗ | return 0; | |
| 47 | } | ||
| 48 | |||
| 49 | 7186 | static int ilbc_probe(const AVProbeData *p) | |
| 50 | { | ||
| 51 | // Only check for "#!iLBC" which matches both formats | ||
| 52 |
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7186 | if (!memcmp(p->buf, mode20_header, 6)) |
| 53 | ✗ | return AVPROBE_SCORE_MAX; | |
| 54 | else | ||
| 55 | 7186 | return 0; | |
| 56 | } | ||
| 57 | |||
| 58 | ✗ | static int ilbc_read_header(AVFormatContext *s) | |
| 59 | { | ||
| 60 | ✗ | AVIOContext *pb = s->pb; | |
| 61 | AVStream *st; | ||
| 62 | uint8_t header[9]; | ||
| 63 | |||
| 64 | ✗ | if (avio_read(pb, header, 9) != 9) | |
| 65 | ✗ | return AVERROR_INVALIDDATA; | |
| 66 | |||
| 67 | ✗ | st = avformat_new_stream(s, NULL); | |
| 68 | ✗ | if (!st) | |
| 69 | ✗ | return AVERROR(ENOMEM); | |
| 70 | ✗ | st->codecpar->codec_id = AV_CODEC_ID_ILBC; | |
| 71 | ✗ | st->codecpar->sample_rate = 8000; | |
| 72 | ✗ | st->codecpar->ch_layout = (AVChannelLayout)AV_CHANNEL_LAYOUT_MONO; | |
| 73 | ✗ | st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO; | |
| 74 | ✗ | st->start_time = 0; | |
| 75 | ✗ | avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate); | |
| 76 | ✗ | if (!memcmp(header, mode20_header, sizeof(mode20_header) - 1)) { | |
| 77 | ✗ | st->codecpar->block_align = 38; | |
| 78 | ✗ | st->codecpar->bit_rate = 15200; | |
| 79 | ✗ | } else if (!memcmp(header, mode30_header, sizeof(mode30_header) - 1)) { | |
| 80 | ✗ | st->codecpar->block_align = 50; | |
| 81 | ✗ | st->codecpar->bit_rate = 13333; | |
| 82 | } else { | ||
| 83 | ✗ | av_log(s, AV_LOG_ERROR, "Unrecognized iLBC file header\n"); | |
| 84 | ✗ | return AVERROR_INVALIDDATA; | |
| 85 | } | ||
| 86 | |||
| 87 | ✗ | return 0; | |
| 88 | } | ||
| 89 | |||
| 90 | ✗ | static int ilbc_read_packet(AVFormatContext *s, | |
| 91 | AVPacket *pkt) | ||
| 92 | { | ||
| 93 | ✗ | AVCodecParameters *par = s->streams[0]->codecpar; | |
| 94 | int ret; | ||
| 95 | |||
| 96 | ✗ | if ((ret = av_get_packet(s->pb, pkt, par->block_align)) != par->block_align) | |
| 97 | ✗ | return ret < 0 ? ret : AVERROR_INVALIDDATA; | |
| 98 | |||
| 99 | ✗ | pkt->stream_index = 0; | |
| 100 | ✗ | pkt->duration = par->block_align == 38 ? 160 : 240; | |
| 101 | |||
| 102 | ✗ | return 0; | |
| 103 | } | ||
| 104 | |||
| 105 | const FFInputFormat ff_ilbc_demuxer = { | ||
| 106 | .p.name = "ilbc", | ||
| 107 | .p.long_name = NULL_IF_CONFIG_SMALL("iLBC storage"), | ||
| 108 | .p.flags = AVFMT_GENERIC_INDEX, | ||
| 109 | .read_probe = ilbc_probe, | ||
| 110 | .read_header = ilbc_read_header, | ||
| 111 | .read_packet = ilbc_read_packet, | ||
| 112 | }; | ||
| 113 | |||
| 114 | #if CONFIG_ILBC_MUXER | ||
| 115 | const FFOutputFormat ff_ilbc_muxer = { | ||
| 116 | .p.name = "ilbc", | ||
| 117 | .p.long_name = NULL_IF_CONFIG_SMALL("iLBC storage"), | ||
| 118 | .p.mime_type = "audio/iLBC", | ||
| 119 | .p.extensions = "lbc", | ||
| 120 | .p.video_codec = AV_CODEC_ID_NONE, | ||
| 121 | .p.audio_codec = AV_CODEC_ID_ILBC, | ||
| 122 | .p.subtitle_codec = AV_CODEC_ID_NONE, | ||
| 123 | .p.flags = AVFMT_NOTIMESTAMPS, | ||
| 124 | .flags_internal = FF_OFMT_FLAG_MAX_ONE_OF_EACH | | ||
| 125 | FF_OFMT_FLAG_ONLY_DEFAULT_CODECS, | ||
| 126 | .write_header = ilbc_write_header, | ||
| 127 | .write_packet = ff_raw_write_packet, | ||
| 128 | }; | ||
| 129 | #endif | ||
| 130 |