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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 6148 | serge | 1 | /* |
| 2 | * Sony OpenMG (OMA) muxer |
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| 3 | * |
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| 4 | * Copyright (c) 2011 Michael Karcher |
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| 5 | * |
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| 6 | * This file is part of FFmpeg. |
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| 7 | * |
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| 8 | * FFmpeg is free software; you can redistribute it and/or |
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| 9 | * modify it under the terms of the GNU Lesser General Public |
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| 10 | * License as published by the Free Software Foundation; either |
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| 11 | * version 2.1 of the License, or (at your option) any later version. |
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| 12 | * |
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| 13 | * FFmpeg is distributed in the hope that it will be useful, |
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| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 16 | * Lesser General Public License for more details. |
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| 17 | * |
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| 18 | * You should have received a copy of the GNU Lesser General Public |
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| 19 | * License along with FFmpeg; if not, write to the Free Software |
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| 20 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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| 21 | */ |
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| 22 | |||
| 23 | #include "avformat.h" |
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| 24 | #include "avio_internal.h" |
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| 25 | #include "id3v2.h" |
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| 26 | #include "internal.h" |
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| 27 | #include "oma.h" |
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| 28 | #include "rawenc.h" |
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| 29 | |||
| 30 | static av_cold int oma_write_header(AVFormatContext *s) |
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| 31 | { |
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| 32 | int i; |
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| 33 | AVCodecContext *format; |
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| 34 | int srate_index; |
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| 35 | int isjointstereo; |
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| 36 | |||
| 37 | format = s->streams[0]->codec; |
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| 38 | /* check for support of the format first */ |
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| 39 | |||
| 40 | for (srate_index = 0; ; srate_index++) { |
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| 41 | if (ff_oma_srate_tab[srate_index] == 0) { |
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| 42 | av_log(s, AV_LOG_ERROR, "Sample rate %d not supported in OpenMG audio\n", |
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| 43 | format->sample_rate); |
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| 44 | return AVERROR(EINVAL); |
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| 45 | } |
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| 46 | |||
| 47 | if (ff_oma_srate_tab[srate_index] * 100 == format->sample_rate) |
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| 48 | break; |
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| 49 | } |
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| 50 | |||
| 51 | /* Metadata; OpenMG does not support ID3v2.4 */ |
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| 52 | ff_id3v2_write_simple(s, 3, ID3v2_EA3_MAGIC); |
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| 53 | |||
| 54 | ffio_wfourcc(s->pb, "EA3\0"); |
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| 55 | avio_w8(s->pb, EA3_HEADER_SIZE >> 7); |
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| 56 | avio_w8(s->pb, EA3_HEADER_SIZE & 0x7F); |
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| 57 | avio_wl16(s->pb, 0xFFFF); /* not encrypted */ |
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| 58 | for (i = 0; i < 6; i++) |
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| 59 | avio_wl32(s->pb, 0); /* Padding + DRM id */ |
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| 60 | |||
| 61 | switch(format->codec_tag) { |
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| 62 | case OMA_CODECID_ATRAC3: |
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| 63 | if (format->channels != 2) { |
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| 64 | av_log(s, AV_LOG_ERROR, "ATRAC3 in OMA is only supported with 2 channels\n"); |
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| 65 | return AVERROR(EINVAL); |
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| 66 | } |
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| 67 | if (format->extradata_size == 14) /* WAV format extradata */ |
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| 68 | isjointstereo = format->extradata[6] != 0; |
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| 69 | else if(format->extradata_size == 10) /* RM format extradata */ |
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| 70 | isjointstereo = format->extradata[8] == 0x12; |
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| 71 | else { |
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| 72 | av_log(s, AV_LOG_ERROR, "ATRAC3: Unsupported extradata size\n"); |
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| 73 | return AVERROR(EINVAL); |
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| 74 | } |
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| 75 | avio_wb32(s->pb, (OMA_CODECID_ATRAC3 << 24) | |
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| 76 | (isjointstereo << 17) | |
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| 77 | (srate_index << 13) | |
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| 78 | (format->block_align/8)); |
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| 79 | break; |
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| 80 | case OMA_CODECID_ATRAC3P: |
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| 81 | avio_wb32(s->pb, (OMA_CODECID_ATRAC3P << 24) | |
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| 82 | (srate_index << 13) | |
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| 83 | (format->channels << 10) | |
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| 84 | (format->block_align/8 - 1)); |
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| 85 | break; |
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| 86 | default: |
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| 87 | av_log(s, AV_LOG_ERROR, "unsupported codec tag %d for write\n", |
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| 88 | format->codec_tag); |
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| 89 | return AVERROR(EINVAL); |
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| 90 | } |
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| 91 | for (i = 0; i < (EA3_HEADER_SIZE - 36)/4; i++) |
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| 92 | avio_wl32(s->pb, 0); /* Padding */ |
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| 93 | |||
| 94 | return 0; |
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| 95 | } |
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| 96 | |||
| 97 | AVOutputFormat ff_oma_muxer = { |
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| 98 | .name = "oma", |
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| 99 | .long_name = NULL_IF_CONFIG_SMALL("Sony OpenMG audio"), |
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| 100 | .mime_type = "audio/x-oma", |
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| 101 | .extensions = "oma", |
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| 102 | .audio_codec = AV_CODEC_ID_ATRAC3, |
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| 103 | .write_header = oma_write_header, |
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| 104 | .write_packet = ff_raw_write_packet, |
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| 105 | .codec_tag = (const AVCodecTag* const []){ff_oma_codec_tags, 0}, |
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| 106 | }; |