2 * Sony OpenMG (OMA) muxer
4 * Copyright (c) 2011 Michael Karcher
6 * This file is part of FFmpeg.
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.
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.
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
24 #include "avio_internal.h"
30 static av_cold
int oma_write_header(AVFormatContext
*s
)
33 AVCodecContext
*format
;
37 format
= s
->streams
[0]->codec
;
38 /* check for support of the format first */
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",
44 return AVERROR(EINVAL
);
47 if (ff_oma_srate_tab
[srate_index
] * 100 == format
->sample_rate
)
51 /* Metadata; OpenMG does not support ID3v2.4 */
52 ff_id3v2_write_simple(s
, 3, ID3v2_EA3_MAGIC
);
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 */
61 switch(format
->codec_tag
) {
62 case OMA_CODECID_ATRAC3
:
63 if (format
->channels
!= 2) {
64 av_log(s
, AV_LOG_ERROR
, "ATRAC3 in OMA is only supported with 2 channels\n");
65 return AVERROR(EINVAL
);
67 if (format
->extradata_size
== 14) /* WAV format extradata */
68 isjointstereo
= format
->extradata
[6] != 0;
69 else if(format
->extradata_size
== 10) /* RM format extradata */
70 isjointstereo
= format
->extradata
[8] == 0x12;
72 av_log(s
, AV_LOG_ERROR
, "ATRAC3: Unsupported extradata size\n");
73 return AVERROR(EINVAL
);
75 avio_wb32(s
->pb
, (OMA_CODECID_ATRAC3
<< 24) |
76 (isjointstereo
<< 17) |
78 (format
->block_align
/8));
80 case OMA_CODECID_ATRAC3P
:
81 avio_wb32(s
->pb
, (OMA_CODECID_ATRAC3P
<< 24) |
83 (format
->channels
<< 10) |
84 (format
->block_align
/8 - 1));
87 av_log(s
, AV_LOG_ERROR
, "unsupported codec tag %d for write\n",
89 return AVERROR(EINVAL
);
91 for (i
= 0; i
< (EA3_HEADER_SIZE
- 36)/4; i
++)
92 avio_wl32(s
->pb
, 0); /* Padding */
97 AVOutputFormat ff_oma_muxer
= {
99 .long_name
= NULL_IF_CONFIG_SMALL("Sony OpenMG audio"),
100 .mime_type
= "audio/x-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
,