blob: 7952808bf862b2ce630ccec344ac9effa6d5a3d1
1 | /* |
2 | * Sony OpenMG (OMA) muxer |
3 | * |
4 | * Copyright (c) 2011 Michael Karcher |
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 "avio_internal.h" |
25 | #include "id3v2.h" |
26 | #include "internal.h" |
27 | #include "oma.h" |
28 | #include "rawenc.h" |
29 | |
30 | static av_cold int oma_write_header(AVFormatContext *s) |
31 | { |
32 | int i; |
33 | AVCodecParameters *par; |
34 | int srate_index; |
35 | int isjointstereo; |
36 | |
37 | par = s->streams[0]->codecpar; |
38 | /* check for support of the format first */ |
39 | |
40 | for (srate_index = 0; ; srate_index++) { |
41 | if (ff_oma_srate_tab[srate_index] == 0) { |
42 | av_log(s, AV_LOG_ERROR, "Sample rate %d not supported in OpenMG audio\n", |
43 | par->sample_rate); |
44 | return AVERROR(EINVAL); |
45 | } |
46 | |
47 | if (ff_oma_srate_tab[srate_index] * 100 == par->sample_rate) |
48 | break; |
49 | } |
50 | |
51 | /* Metadata; OpenMG does not support ID3v2.4 */ |
52 | ff_id3v2_write_simple(s, 3, ID3v2_EA3_MAGIC); |
53 | |
54 | ffio_wfourcc(s->pb, "EA3\0"); |
55 | avio_w8(s->pb, EA3_HEADER_SIZE >> 7); |
56 | avio_w8(s->pb, EA3_HEADER_SIZE & 0x7F); |
57 | avio_wl16(s->pb, 0xFFFF); /* not encrypted */ |
58 | for (i = 0; i < 6; i++) |
59 | avio_wl32(s->pb, 0); /* Padding + DRM id */ |
60 | |
61 | switch (par->codec_tag) { |
62 | case OMA_CODECID_ATRAC3: |
63 | if (par->channels != 2) { |
64 | av_log(s, AV_LOG_ERROR, "ATRAC3 in OMA is only supported with 2 channels\n"); |
65 | return AVERROR(EINVAL); |
66 | } |
67 | if (par->extradata_size == 14) /* WAV format extradata */ |
68 | isjointstereo = par->extradata[6] != 0; |
69 | else if(par->extradata_size == 10) /* RM format extradata */ |
70 | isjointstereo = par->extradata[8] == 0x12; |
71 | else { |
72 | av_log(s, AV_LOG_ERROR, "ATRAC3: Unsupported extradata size\n"); |
73 | return AVERROR(EINVAL); |
74 | } |
75 | avio_wb32(s->pb, (OMA_CODECID_ATRAC3 << 24) | |
76 | (isjointstereo << 17) | |
77 | (srate_index << 13) | |
78 | (par->block_align/8)); |
79 | break; |
80 | case OMA_CODECID_ATRAC3P: |
81 | avio_wb32(s->pb, (OMA_CODECID_ATRAC3P << 24) | |
82 | (srate_index << 13) | |
83 | (par->channels << 10) | |
84 | (par->block_align/8 - 1)); |
85 | break; |
86 | default: |
87 | av_log(s, AV_LOG_ERROR, "unsupported codec tag %s for write\n", |
88 | av_fourcc2str(par->codec_tag)); |
89 | return AVERROR(EINVAL); |
90 | } |
91 | for (i = 0; i < (EA3_HEADER_SIZE - 36)/4; i++) |
92 | avio_wl32(s->pb, 0); /* Padding */ |
93 | |
94 | return 0; |
95 | } |
96 | |
97 | AVOutputFormat ff_oma_muxer = { |
98 | .name = "oma", |
99 | .long_name = NULL_IF_CONFIG_SMALL("Sony OpenMG audio"), |
100 | .mime_type = "audio/x-oma", |
101 | .extensions = "oma", |
102 | .audio_codec = AV_CODEC_ID_ATRAC3, |
103 | .write_header = oma_write_header, |
104 | .write_packet = ff_raw_write_packet, |
105 | .codec_tag = (const AVCodecTag* const []){ff_oma_codec_tags, 0}, |
106 | .flags = AVFMT_NOTIMESTAMPS, |
107 | }; |
108 |