2
* Creative Voice File muxer.
3
* Copyright (c) 2006 Aurelien Jacobs <aurel@gnuage.org>
5
* This file is part of FFmpeg.
7
* FFmpeg is free software; you can redistribute it and/or
8
* modify it under the terms of the GNU Lesser General Public
9
* License as published by the Free Software Foundation; either
10
* version 2.1 of the License, or (at your option) any later version.
12
* FFmpeg is distributed in the hope that it will be useful,
13
* but WITHOUT ANY WARRANTY; without even the implied warranty of
14
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15
* Lesser General Public License for more details.
17
* You should have received a copy of the GNU Lesser General Public
18
* License along with FFmpeg; if not, write to the Free Software
19
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
25
typedef struct voc_enc_context {
29
static int voc_write_header(AVFormatContext *s)
31
ByteIOContext *pb = &s->pb;
32
const int header_size = 26;
33
const int version = 0x0114;
35
if (s->nb_streams != 1
36
|| s->streams[0]->codec->codec_type != CODEC_TYPE_AUDIO)
37
return AVERROR_NOTSUPP;
39
put_buffer(pb, voc_magic, sizeof(voc_magic) - 1);
40
put_le16(pb, header_size);
41
put_le16(pb, version);
42
put_le16(pb, ~version + 0x1234);
47
static int voc_write_packet(AVFormatContext *s, AVPacket *pkt)
49
voc_enc_context_t *voc = s->priv_data;
50
AVCodecContext *enc = s->streams[0]->codec;
51
ByteIOContext *pb = &s->pb;
53
if (!voc->param_written) {
54
if (enc->codec_tag > 0xFF) {
55
put_byte(pb, VOC_TYPE_NEW_VOICE_DATA);
56
put_le24(pb, pkt->size + 12);
57
put_le32(pb, enc->sample_rate);
58
put_byte(pb, enc->bits_per_sample);
59
put_byte(pb, enc->channels);
60
put_le16(pb, enc->codec_tag);
63
if (s->streams[0]->codec->channels > 1) {
64
put_byte(pb, VOC_TYPE_EXTENDED);
66
put_le16(pb, 65536-256000000/(enc->sample_rate*enc->channels));
67
put_byte(pb, enc->codec_tag);
68
put_byte(pb, enc->channels - 1);
70
put_byte(pb, VOC_TYPE_VOICE_DATA);
71
put_le24(pb, pkt->size + 2);
72
put_byte(pb, 256 - 1000000 / enc->sample_rate);
73
put_byte(pb, enc->codec_tag);
75
voc->param_written = 1;
77
put_byte(pb, VOC_TYPE_VOICE_DATA_CONT);
78
put_le24(pb, pkt->size);
81
put_buffer(pb, pkt->data, pkt->size);
85
static int voc_write_trailer(AVFormatContext *s)
91
AVOutputFormat voc_muxer = {
93
"Creative Voice File format",
96
sizeof(voc_enc_context_t),
102
.codec_tag=(const AVCodecTag*[]){voc_codec_tags, 0},