mirror of
https://git.ffmpeg.org/ffmpeg.git
synced 2024-12-22 07:20:45 +00:00
104 lines
3.0 KiB
C
104 lines
3.0 KiB
C
/*
|
|
* Creative Voice File muxer.
|
|
* Copyright (c) 2006 Aurelien Jacobs <aurel@gnuage.org>
|
|
*
|
|
* 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 "voc.h"
|
|
|
|
|
|
typedef struct voc_enc_context {
|
|
int param_written;
|
|
} voc_enc_context_t;
|
|
|
|
static int voc_write_header(AVFormatContext *s)
|
|
{
|
|
ByteIOContext *pb = &s->pb;
|
|
const int header_size = 26;
|
|
const int version = 0x0114;
|
|
|
|
if (s->nb_streams != 1
|
|
|| s->streams[0]->codec->codec_type != CODEC_TYPE_AUDIO)
|
|
return AVERROR_PATCHWELCOME;
|
|
|
|
put_buffer(pb, voc_magic, sizeof(voc_magic) - 1);
|
|
put_le16(pb, header_size);
|
|
put_le16(pb, version);
|
|
put_le16(pb, ~version + 0x1234);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int voc_write_packet(AVFormatContext *s, AVPacket *pkt)
|
|
{
|
|
voc_enc_context_t *voc = s->priv_data;
|
|
AVCodecContext *enc = s->streams[0]->codec;
|
|
ByteIOContext *pb = &s->pb;
|
|
|
|
if (!voc->param_written) {
|
|
if (enc->codec_tag > 0xFF) {
|
|
put_byte(pb, VOC_TYPE_NEW_VOICE_DATA);
|
|
put_le24(pb, pkt->size + 12);
|
|
put_le32(pb, enc->sample_rate);
|
|
put_byte(pb, enc->bits_per_sample);
|
|
put_byte(pb, enc->channels);
|
|
put_le16(pb, enc->codec_tag);
|
|
put_le32(pb, 0);
|
|
} else {
|
|
if (s->streams[0]->codec->channels > 1) {
|
|
put_byte(pb, VOC_TYPE_EXTENDED);
|
|
put_le24(pb, 4);
|
|
put_le16(pb, 65536-256000000/(enc->sample_rate*enc->channels));
|
|
put_byte(pb, enc->codec_tag);
|
|
put_byte(pb, enc->channels - 1);
|
|
}
|
|
put_byte(pb, VOC_TYPE_VOICE_DATA);
|
|
put_le24(pb, pkt->size + 2);
|
|
put_byte(pb, 256 - 1000000 / enc->sample_rate);
|
|
put_byte(pb, enc->codec_tag);
|
|
}
|
|
voc->param_written = 1;
|
|
} else {
|
|
put_byte(pb, VOC_TYPE_VOICE_DATA_CONT);
|
|
put_le24(pb, pkt->size);
|
|
}
|
|
|
|
put_buffer(pb, pkt->data, pkt->size);
|
|
return 0;
|
|
}
|
|
|
|
static int voc_write_trailer(AVFormatContext *s)
|
|
{
|
|
put_byte(&s->pb, 0);
|
|
return 0;
|
|
}
|
|
|
|
AVOutputFormat voc_muxer = {
|
|
"voc",
|
|
"Creative Voice File format",
|
|
"audio/x-voc",
|
|
"voc",
|
|
sizeof(voc_enc_context_t),
|
|
CODEC_ID_PCM_U8,
|
|
CODEC_ID_NONE,
|
|
voc_write_header,
|
|
voc_write_packet,
|
|
voc_write_trailer,
|
|
.codec_tag=(const AVCodecTag*[]){voc_codec_tags, 0},
|
|
};
|