repositories / deb_ffmpeg.git / blame
| Commit | Line | Data |
|---|---|---|
| 2ba45a60 DM |
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 "riff.h" | |
| 26 | #include "rso.h" | |
| 27 | ||
| 28 | static int rso_write_header(AVFormatContext *s) | |
| 29 | { | |
| 30 | AVIOContext *pb = s->pb; | |
| 31 | AVCodecContext *enc = s->streams[0]->codec; | |
| 32 | ||
| 33 | if (!enc->codec_tag) | |
| 34 | return AVERROR_INVALIDDATA; | |
| 35 | ||
| 36 | if (enc->channels != 1) { | |
| 37 | av_log(s, AV_LOG_ERROR, "RSO only supports mono\n"); | |
| 38 | return AVERROR_INVALIDDATA; | |
| 39 | } | |
| 40 | ||
| 41 | if (!s->pb->seekable) { | |
| 42 | av_log(s, AV_LOG_ERROR, "muxer does not support non seekable output\n"); | |
| 43 | return AVERROR_INVALIDDATA; | |
| 44 | } | |
| 45 | ||
| 46 | /* XXX: find legal sample rates (if any) */ | |
| 47 | if (enc->sample_rate >= 1u<<16) { | |
| 48 | av_log(s, AV_LOG_ERROR, "Sample rate must be < 65536\n"); | |
| 49 | return AVERROR_INVALIDDATA; | |
| 50 | } | |
| 51 | ||
| 52 | if (enc->codec_id == AV_CODEC_ID_ADPCM_IMA_WAV) { | |
| 53 | av_log(s, AV_LOG_ERROR, "ADPCM in RSO not implemented\n"); | |
| 54 | return AVERROR_PATCHWELCOME; | |
| 55 | } | |
| 56 | ||
| 57 | /* format header */ | |
| 58 | avio_wb16(pb, enc->codec_tag); /* codec ID */ | |
| 59 | avio_wb16(pb, 0); /* data size, will be written at EOF */ | |
| 60 | avio_wb16(pb, enc->sample_rate); | |
| 61 | avio_wb16(pb, 0x0000); /* play mode ? (0x0000 = don't loop) */ | |
| 62 | ||
| 63 | avio_flush(pb); | |
| 64 | ||
| 65 | return 0; | |
| 66 | } | |
| 67 | ||
| 68 | static int rso_write_packet(AVFormatContext *s, AVPacket *pkt) | |
| 69 | { | |
| 70 | avio_write(s->pb, pkt->data, pkt->size); | |
| 71 | return 0; | |
| 72 | } | |
| 73 | ||
| 74 | static int rso_write_trailer(AVFormatContext *s) | |
| 75 | { | |
| 76 | AVIOContext *pb = s->pb; | |
| 77 | int64_t file_size; | |
| 78 | uint16_t coded_file_size; | |
| 79 | ||
| 80 | file_size = avio_tell(pb); | |
| 81 | ||
| 82 | if (file_size < 0) | |
| 83 | return file_size; | |
| 84 | ||
| 85 | if (file_size > 0xffff + RSO_HEADER_SIZE) { | |
| 86 | av_log(s, AV_LOG_WARNING, | |
| 87 | "Output file is too big (%"PRId64" bytes >= 64kB)\n", file_size); | |
| 88 | coded_file_size = 0xffff; | |
| 89 | } else { | |
| 90 | coded_file_size = file_size - RSO_HEADER_SIZE; | |
| 91 | } | |
| 92 | ||
| 93 | /* update file size */ | |
| 94 | avio_seek(pb, 2, SEEK_SET); | |
| 95 | avio_wb16(pb, coded_file_size); | |
| 96 | avio_seek(pb, file_size, SEEK_SET); | |
| 97 | ||
| 98 | return 0; | |
| 99 | } | |
| 100 | ||
| 101 | AVOutputFormat ff_rso_muxer = { | |
| 102 | .name = "rso", | |
| 103 | .long_name = NULL_IF_CONFIG_SMALL("Lego Mindstorms RSO"), | |
| 104 | .extensions = "rso", | |
| 105 | .audio_codec = AV_CODEC_ID_PCM_U8, | |
| 106 | .video_codec = AV_CODEC_ID_NONE, | |
| 107 | .write_header = rso_write_header, | |
| 108 | .write_packet = rso_write_packet, | |
| 109 | .write_trailer = rso_write_trailer, | |
| 110 | .codec_tag = (const AVCodecTag* const []){ff_codec_rso_tags, 0}, | |
| 111 | .flags = AVFMT_NOTIMESTAMPS, | |
| 112 | }; |