mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-12-23 12:43:46 +02:00
130 lines
3.8 KiB
C
130 lines
3.8 KiB
C
/*
|
|
* 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 Libav.
|
|
*
|
|
* Libav 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.
|
|
*
|
|
* Libav 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 Libav; 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 "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 = (comment_len + 7) & ~7;
|
|
|
|
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);
|
|
|
|
for ( ; comment_size > comment_len; comment_len++)
|
|
avio_w8(pb, 0);
|
|
|
|
avio_flush(pb);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int sox_write_packet(AVFormatContext *s, AVPacket *pkt)
|
|
{
|
|
AVIOContext *pb = s->pb;
|
|
avio_write(pb, pkt->data, pkt->size);
|
|
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 = sox_write_packet,
|
|
.write_trailer = sox_write_trailer,
|
|
.flags = AVFMT_NOTIMESTAMPS,
|
|
};
|