0,0 → 1,121 |
/* |
* SoX native format muxer |
* Copyright (c) 2009 Daniel Verkamp <daniel@drv.nu> |
* |
* Based on libSoX sox-fmt.c |
* Copyright (c) 2008 robs@users.sourceforge.net |
* |
* 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 |
*/ |
|
/** |
* @file |
* SoX native format muxer |
* @author Daniel Verkamp |
* @see http://wiki.multimedia.cx/index.php?title=SoX_native_intermediate_format |
*/ |
|
#include "libavutil/intreadwrite.h" |
#include "libavutil/intfloat.h" |
#include "libavutil/dict.h" |
#include "avformat.h" |
#include "avio_internal.h" |
#include "rawenc.h" |
#include "sox.h" |
|
typedef struct { |
int64_t header_size; |
} SoXContext; |
|
static int sox_write_header(AVFormatContext *s) |
{ |
SoXContext *sox = s->priv_data; |
AVIOContext *pb = s->pb; |
AVCodecContext *enc = s->streams[0]->codec; |
AVDictionaryEntry *comment; |
size_t comment_len = 0, comment_size; |
|
comment = av_dict_get(s->metadata, "comment", NULL, 0); |
if (comment) |
comment_len = strlen(comment->value); |
comment_size = FFALIGN(comment_len, 8); |
|
sox->header_size = SOX_FIXED_HDR + comment_size; |
|
if (enc->codec_id == AV_CODEC_ID_PCM_S32LE) { |
ffio_wfourcc(pb, ".SoX"); |
avio_wl32(pb, sox->header_size); |
avio_wl64(pb, 0); /* number of samples */ |
avio_wl64(pb, av_double2int(enc->sample_rate)); |
avio_wl32(pb, enc->channels); |
avio_wl32(pb, comment_size); |
} else if (enc->codec_id == AV_CODEC_ID_PCM_S32BE) { |
ffio_wfourcc(pb, "XoS."); |
avio_wb32(pb, sox->header_size); |
avio_wb64(pb, 0); /* number of samples */ |
avio_wb64(pb, av_double2int(enc->sample_rate)); |
avio_wb32(pb, enc->channels); |
avio_wb32(pb, comment_size); |
} else { |
av_log(s, AV_LOG_ERROR, "invalid codec; use pcm_s32le or pcm_s32be\n"); |
return -1; |
} |
|
if (comment_len) |
avio_write(pb, comment->value, comment_len); |
|
ffio_fill(pb, 0, comment_size - comment_len); |
|
avio_flush(pb); |
|
return 0; |
} |
|
static int sox_write_trailer(AVFormatContext *s) |
{ |
SoXContext *sox = s->priv_data; |
AVIOContext *pb = s->pb; |
AVCodecContext *enc = s->streams[0]->codec; |
|
if (s->pb->seekable) { |
/* update number of samples */ |
int64_t file_size = avio_tell(pb); |
int64_t num_samples = (file_size - sox->header_size - 4LL) >> 2LL; |
avio_seek(pb, 8, SEEK_SET); |
if (enc->codec_id == AV_CODEC_ID_PCM_S32LE) { |
avio_wl64(pb, num_samples); |
} else |
avio_wb64(pb, num_samples); |
avio_seek(pb, file_size, SEEK_SET); |
|
avio_flush(pb); |
} |
|
return 0; |
} |
|
AVOutputFormat ff_sox_muxer = { |
.name = "sox", |
.long_name = NULL_IF_CONFIG_SMALL("SoX native"), |
.extensions = "sox", |
.priv_data_size = sizeof(SoXContext), |
.audio_codec = AV_CODEC_ID_PCM_S32LE, |
.video_codec = AV_CODEC_ID_NONE, |
.write_header = sox_write_header, |
.write_packet = ff_raw_write_packet, |
.write_trailer = sox_write_trailer, |
}; |