Commit | Line | Data |
---|---|---|
2ba45a60 DM |
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 | AVCodecContext *format; | |
34 | int srate_index; | |
35 | int isjointstereo; | |
36 | ||
37 | format = s->streams[0]->codec; | |
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 | format->sample_rate); | |
44 | return AVERROR(EINVAL); | |
45 | } | |
46 | ||
47 | if (ff_oma_srate_tab[srate_index] * 100 == format->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(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); | |
66 | } | |
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; | |
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 | (format->block_align/8)); | |
79 | break; | |
80 | case OMA_CODECID_ATRAC3P: | |
81 | avio_wb32(s->pb, (OMA_CODECID_ATRAC3P << 24) | | |
82 | (srate_index << 13) | | |
83 | (format->channels << 10) | | |
84 | (format->block_align/8 - 1)); | |
85 | break; | |
86 | default: | |
87 | av_log(s, AV_LOG_ERROR, "unsupported codec tag %d for write\n", | |
88 | format->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 | }; |