mirror of https://github.com/FFmpeg/FFmpeg.git
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
126 lines
3.5 KiB
126 lines
3.5 KiB
/* |
|
* 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 |
|
*/ |
|
|
|
/** |
|
* SoX native format muxer |
|
* @file |
|
* @author Daniel Verkamp |
|
* @sa http://wiki.multimedia.cx/index.php?title=SoX_native_intermediate_format |
|
*/ |
|
|
|
#include "libavutil/intreadwrite.h" |
|
#include "avformat.h" |
|
#include "sox.h" |
|
|
|
typedef struct { |
|
int64_t header_size; |
|
} SoXContext; |
|
|
|
static int sox_write_header(AVFormatContext *s) |
|
{ |
|
SoXContext *sox = s->priv_data; |
|
ByteIOContext *pb = s->pb; |
|
AVCodecContext *enc = s->streams[0]->codec; |
|
AVMetadataTag *comment; |
|
size_t comment_len = 0, comment_size; |
|
|
|
comment = av_metadata_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 == CODEC_ID_PCM_S32LE) { |
|
put_tag(pb, ".SoX"); |
|
put_le32(pb, sox->header_size); |
|
put_le64(pb, 0); /* number of samples */ |
|
put_le64(pb, av_dbl2int(enc->sample_rate)); |
|
put_le32(pb, enc->channels); |
|
put_le32(pb, comment_size); |
|
} else if (enc->codec_id == CODEC_ID_PCM_S32BE) { |
|
put_tag(pb, "XoS."); |
|
put_be32(pb, sox->header_size); |
|
put_be64(pb, 0); /* number of samples */ |
|
put_be64(pb, av_dbl2int(enc->sample_rate)); |
|
put_be32(pb, enc->channels); |
|
put_be32(pb, comment_size); |
|
} else { |
|
av_log(s, AV_LOG_ERROR, "invalid codec; use pcm_s32le or pcm_s32be\n"); |
|
return -1; |
|
} |
|
|
|
if (comment_len) |
|
put_buffer(pb, comment->value, comment_len); |
|
|
|
for ( ; comment_size > comment_len; comment_len++) |
|
put_byte(pb, 0); |
|
|
|
put_flush_packet(pb); |
|
|
|
return 0; |
|
} |
|
|
|
static int sox_write_packet(AVFormatContext *s, AVPacket *pkt) |
|
{ |
|
ByteIOContext *pb = s->pb; |
|
put_buffer(pb, pkt->data, pkt->size); |
|
return 0; |
|
} |
|
|
|
static int sox_write_trailer(AVFormatContext *s) |
|
{ |
|
SoXContext *sox = s->priv_data; |
|
ByteIOContext *pb = s->pb; |
|
AVCodecContext *enc = s->streams[0]->codec; |
|
|
|
if (!url_is_streamed(s->pb)) { |
|
/* update number of samples */ |
|
int64_t file_size = url_ftell(pb); |
|
int64_t num_samples = (file_size - sox->header_size - 4LL) >> 2LL; |
|
url_fseek(pb, 8, SEEK_SET); |
|
if (enc->codec_id == CODEC_ID_PCM_S32LE) { |
|
put_le64(pb, num_samples); |
|
} else |
|
put_be64(pb, num_samples); |
|
url_fseek(pb, file_size, SEEK_SET); |
|
|
|
put_flush_packet(pb); |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
AVOutputFormat sox_muxer = { |
|
"sox", |
|
NULL_IF_CONFIG_SMALL("SoX native format"), |
|
NULL, |
|
"sox", |
|
sizeof(SoXContext), |
|
CODEC_ID_PCM_S32LE, |
|
CODEC_ID_NONE, |
|
sox_write_header, |
|
sox_write_packet, |
|
sox_write_trailer, |
|
};
|
|
|