export a few more codec_tag-codec_id tables
[libav.git] / libavformat / vocenc.c
1 /*
2 * Creative Voice File muxer.
3 * Copyright (c) 2006 Aurelien Jacobs <aurel@gnuage.org>
4 *
5 * This file is part of FFmpeg.
6 *
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.
11 *
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.
16 *
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
20 */
21
22 #include "voc.h"
23
24
25 typedef struct voc_enc_context {
26 int param_written;
27 } voc_enc_context_t;
28
29 static int voc_write_header(AVFormatContext *s)
30 {
31 ByteIOContext *pb = &s->pb;
32 const int header_size = 26;
33 const int version = 0x0114;
34
35 if (s->nb_streams != 1
36 || s->streams[0]->codec->codec_type != CODEC_TYPE_AUDIO)
37 return AVERROR_NOTSUPP;
38
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);
43
44 return 0;
45 }
46
47 static int voc_write_packet(AVFormatContext *s, AVPacket *pkt)
48 {
49 voc_enc_context_t *voc = s->priv_data;
50 AVCodecContext *enc = s->streams[0]->codec;
51 ByteIOContext *pb = &s->pb;
52
53 if (!voc->param_written) {
54 int format = codec_get_tag(voc_codec_tags, enc->codec_id);
55
56 if (format > 0xFF) {
57 put_byte(pb, VOC_TYPE_NEW_VOICE_DATA);
58 put_le24(pb, pkt->size + 12);
59 put_le32(pb, enc->sample_rate);
60 put_byte(pb, enc->bits_per_sample);
61 put_byte(pb, enc->channels);
62 put_le16(pb, format);
63 put_le32(pb, 0);
64 } else {
65 if (s->streams[0]->codec->channels > 1) {
66 put_byte(pb, VOC_TYPE_EXTENDED);
67 put_le24(pb, 4);
68 put_le16(pb, 65536-256000000/(enc->sample_rate*enc->channels));
69 put_byte(pb, format);
70 put_byte(pb, enc->channels - 1);
71 }
72 put_byte(pb, VOC_TYPE_VOICE_DATA);
73 put_le24(pb, pkt->size + 2);
74 put_byte(pb, 256 - 1000000 / enc->sample_rate);
75 put_byte(pb, format);
76 }
77 voc->param_written = 1;
78 } else {
79 put_byte(pb, VOC_TYPE_VOICE_DATA_CONT);
80 put_le24(pb, pkt->size);
81 }
82
83 put_buffer(pb, pkt->data, pkt->size);
84 return 0;
85 }
86
87 static int voc_write_trailer(AVFormatContext *s)
88 {
89 put_byte(&s->pb, 0);
90 return 0;
91 }
92
93 AVOutputFormat voc_muxer = {
94 "voc",
95 "Creative Voice File format",
96 "audio/x-voc",
97 "voc",
98 sizeof(voc_enc_context_t),
99 CODEC_ID_PCM_U8,
100 CODEC_ID_NONE,
101 voc_write_header,
102 voc_write_packet,
103 voc_write_trailer,
104 .codec_tag={voc_codec_tags},
105 };