0,0 → 1,106 |
/* |
* Sony OpenMG (OMA) muxer |
* |
* Copyright (c) 2011 Michael Karcher |
* |
* This file is part of FFmpeg. |
* |
* FFmpeg is free software; you can redistribute it and/or |
* modify it under the terms of the GNU Lesser General Public |
* License as published by the Free Software Foundation; either |
* version 2.1 of the License, or (at your option) any later version. |
* |
* FFmpeg is distributed in the hope that it will be useful, |
* but WITHOUT ANY WARRANTY; without even the implied warranty of |
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
* Lesser General Public License for more details. |
* |
* You should have received a copy of the GNU Lesser General Public |
* License along with FFmpeg; if not, write to the Free Software |
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
*/ |
|
#include "avformat.h" |
#include "avio_internal.h" |
#include "id3v2.h" |
#include "internal.h" |
#include "oma.h" |
#include "rawenc.h" |
|
static av_cold int oma_write_header(AVFormatContext *s) |
{ |
int i; |
AVCodecContext *format; |
int srate_index; |
int isjointstereo; |
|
format = s->streams[0]->codec; |
/* check for support of the format first */ |
|
for (srate_index = 0; ; srate_index++) { |
if (ff_oma_srate_tab[srate_index] == 0) { |
av_log(s, AV_LOG_ERROR, "Sample rate %d not supported in OpenMG audio\n", |
format->sample_rate); |
return AVERROR(EINVAL); |
} |
|
if (ff_oma_srate_tab[srate_index] * 100 == format->sample_rate) |
break; |
} |
|
/* Metadata; OpenMG does not support ID3v2.4 */ |
ff_id3v2_write_simple(s, 3, ID3v2_EA3_MAGIC); |
|
ffio_wfourcc(s->pb, "EA3\0"); |
avio_w8(s->pb, EA3_HEADER_SIZE >> 7); |
avio_w8(s->pb, EA3_HEADER_SIZE & 0x7F); |
avio_wl16(s->pb, 0xFFFF); /* not encrypted */ |
for (i = 0; i < 6; i++) |
avio_wl32(s->pb, 0); /* Padding + DRM id */ |
|
switch(format->codec_tag) { |
case OMA_CODECID_ATRAC3: |
if (format->channels != 2) { |
av_log(s, AV_LOG_ERROR, "ATRAC3 in OMA is only supported with 2 channels\n"); |
return AVERROR(EINVAL); |
} |
if (format->extradata_size == 14) /* WAV format extradata */ |
isjointstereo = format->extradata[6] != 0; |
else if(format->extradata_size == 10) /* RM format extradata */ |
isjointstereo = format->extradata[8] == 0x12; |
else { |
av_log(s, AV_LOG_ERROR, "ATRAC3: Unsupported extradata size\n"); |
return AVERROR(EINVAL); |
} |
avio_wb32(s->pb, (OMA_CODECID_ATRAC3 << 24) | |
(isjointstereo << 17) | |
(srate_index << 13) | |
(format->block_align/8)); |
break; |
case OMA_CODECID_ATRAC3P: |
avio_wb32(s->pb, (OMA_CODECID_ATRAC3P << 24) | |
(srate_index << 13) | |
(format->channels << 10) | |
(format->block_align/8 - 1)); |
break; |
default: |
av_log(s, AV_LOG_ERROR, "unsupported codec tag %d for write\n", |
format->codec_tag); |
return AVERROR(EINVAL); |
} |
for (i = 0; i < (EA3_HEADER_SIZE - 36)/4; i++) |
avio_wl32(s->pb, 0); /* Padding */ |
|
return 0; |
} |
|
AVOutputFormat ff_oma_muxer = { |
.name = "oma", |
.long_name = NULL_IF_CONFIG_SMALL("Sony OpenMG audio"), |
.mime_type = "audio/x-oma", |
.extensions = "oma", |
.audio_codec = AV_CODEC_ID_ATRAC3, |
.write_header = oma_write_header, |
.write_packet = ff_raw_write_packet, |
.codec_tag = (const AVCodecTag* const []){ff_oma_codec_tags, 0}, |
}; |