| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | /* | ||
| 2 | * RSO muxer | ||
| 3 | * Copyright (c) 2001 Fabrice Bellard (original AU code) | ||
| 4 | * Copyright (c) 2010 Rafael Carre | ||
| 5 | * | ||
| 6 | * This file is part of FFmpeg. | ||
| 7 | * | ||
| 8 | * FFmpeg is free software; you can redistribute it and/or | ||
| 9 | * modify it under the terms of the GNU Lesser General Public | ||
| 10 | * License as published by the Free Software Foundation; either | ||
| 11 | * version 2.1 of the License, or (at your option) any later version. | ||
| 12 | * | ||
| 13 | * FFmpeg is distributed in the hope that it will be useful, | ||
| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
| 16 | * Lesser General Public License for more details. | ||
| 17 | * | ||
| 18 | * You should have received a copy of the GNU Lesser General Public | ||
| 19 | * License along with FFmpeg; if not, write to the Free Software | ||
| 20 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | ||
| 21 | */ | ||
| 22 | |||
| 23 | #include "avformat.h" | ||
| 24 | #include "internal.h" | ||
| 25 | #include "mux.h" | ||
| 26 | #include "rawenc.h" | ||
| 27 | #include "riff.h" | ||
| 28 | #include "rso.h" | ||
| 29 | |||
| 30 | 1 | static int rso_write_header(AVFormatContext *s) | |
| 31 | { | ||
| 32 | 1 | AVIOContext *pb = s->pb; | |
| 33 | 1 | AVCodecParameters *par = s->streams[0]->codecpar; | |
| 34 | |||
| 35 |
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1 | if (!par->codec_tag) |
| 36 | ✗ | return AVERROR_INVALIDDATA; | |
| 37 | |||
| 38 |
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1 | if (par->ch_layout.nb_channels != 1) { |
| 39 | ✗ | av_log(s, AV_LOG_ERROR, "RSO only supports mono\n"); | |
| 40 | ✗ | return AVERROR_INVALIDDATA; | |
| 41 | } | ||
| 42 | |||
| 43 |
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1 | if (!(s->pb->seekable & AVIO_SEEKABLE_NORMAL)) { |
| 44 | ✗ | av_log(s, AV_LOG_ERROR, "muxer does not support non seekable output\n"); | |
| 45 | ✗ | return AVERROR_INVALIDDATA; | |
| 46 | } | ||
| 47 | |||
| 48 | /* XXX: find legal sample rates (if any) */ | ||
| 49 |
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1 | if (par->sample_rate >= 1u<<16) { |
| 50 | ✗ | av_log(s, AV_LOG_ERROR, "Sample rate must be < 65536\n"); | |
| 51 | ✗ | return AVERROR_INVALIDDATA; | |
| 52 | } | ||
| 53 | |||
| 54 |
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1 | if (par->codec_id == AV_CODEC_ID_ADPCM_IMA_WAV) { |
| 55 | ✗ | avpriv_report_missing_feature(s, "ADPCM in RSO"); | |
| 56 | ✗ | return AVERROR_PATCHWELCOME; | |
| 57 | } | ||
| 58 | |||
| 59 | /* format header */ | ||
| 60 | 1 | avio_wb16(pb, par->codec_tag); /* codec ID */ | |
| 61 | 1 | avio_wb16(pb, 0); /* data size, will be written at EOF */ | |
| 62 | 1 | avio_wb16(pb, par->sample_rate); | |
| 63 | 1 | avio_wb16(pb, 0x0000); /* play mode ? (0x0000 = don't loop) */ | |
| 64 | |||
| 65 | 1 | return 0; | |
| 66 | } | ||
| 67 | |||
| 68 | 1 | static int rso_write_trailer(AVFormatContext *s) | |
| 69 | { | ||
| 70 | 1 | AVIOContext *pb = s->pb; | |
| 71 | int64_t file_size; | ||
| 72 | uint16_t coded_file_size; | ||
| 73 | |||
| 74 | 1 | file_size = avio_tell(pb); | |
| 75 | |||
| 76 |
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1 | if (file_size < 0) |
| 77 | ✗ | return file_size; | |
| 78 | |||
| 79 |
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1 | if (file_size > 0xffff + RSO_HEADER_SIZE) { |
| 80 | ✗ | av_log(s, AV_LOG_WARNING, | |
| 81 | "Output file is too big (%"PRId64" bytes >= 64kB)\n", file_size); | ||
| 82 | ✗ | coded_file_size = 0xffff; | |
| 83 | } else { | ||
| 84 | 1 | coded_file_size = file_size - RSO_HEADER_SIZE; | |
| 85 | } | ||
| 86 | |||
| 87 | /* update file size */ | ||
| 88 | 1 | avio_seek(pb, 2, SEEK_SET); | |
| 89 | 1 | avio_wb16(pb, coded_file_size); | |
| 90 | 1 | avio_seek(pb, file_size, SEEK_SET); | |
| 91 | |||
| 92 | 1 | return 0; | |
| 93 | } | ||
| 94 | |||
| 95 | const FFOutputFormat ff_rso_muxer = { | ||
| 96 | .p.name = "rso", | ||
| 97 | .p.long_name = NULL_IF_CONFIG_SMALL("Lego Mindstorms RSO"), | ||
| 98 | .p.extensions = "rso", | ||
| 99 | .p.audio_codec = AV_CODEC_ID_PCM_U8, | ||
| 100 | .p.video_codec = AV_CODEC_ID_NONE, | ||
| 101 | .p.subtitle_codec = AV_CODEC_ID_NONE, | ||
| 102 | .flags_internal = FF_OFMT_FLAG_MAX_ONE_OF_EACH, | ||
| 103 | .write_header = rso_write_header, | ||
| 104 | .write_packet = ff_raw_write_packet, | ||
| 105 | .write_trailer = rso_write_trailer, | ||
| 106 | .p.codec_tag = ff_rso_codec_tags_list, | ||
| 107 | .p.flags = AVFMT_NOTIMESTAMPS, | ||
| 108 | }; | ||
| 109 |