3 * Copyright (c) 2001 Fabrice Bellard.
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 Street, Fifth Floor, Boston, MA 02110-1301 USA
23 * First version by Francois Revol revol@free.fr
25 * Reference documents:
26 * http://www.opengroup.org/public/pubs/external/auformat.html
27 * http://www.goice.co.jp/member/mo/formats/au.html
34 /* if we don't know the size in advance */
35 #define AU_UNKNOWN_SIZE ((uint32_t)(~0))
37 /* The ffmpeg codecs we support, and the IDs they have in the file */
38 static const AVCodecTag codec_au_tags
[] = {
39 { CODEC_ID_PCM_MULAW
, 1 },
40 { CODEC_ID_PCM_S8
, 2 },
41 { CODEC_ID_PCM_S16BE
, 3 },
42 { CODEC_ID_PCM_S24BE
, 4 },
43 { CODEC_ID_PCM_S32BE
, 5 },
44 { CODEC_ID_PCM_F32BE
, 6 },
45 { CODEC_ID_PCM_F64BE
, 7 },
46 { CODEC_ID_PCM_ALAW
, 27 },
50 #ifdef CONFIG_AU_MUXER
51 /* AUDIO_FILE header */
52 static int put_au_header(ByteIOContext
*pb
, AVCodecContext
*enc
)
56 put_tag(pb
, ".snd"); /* magic number */
57 put_be32(pb
, 24); /* header size */
58 put_be32(pb
, AU_UNKNOWN_SIZE
); /* data size */
59 put_be32(pb
, (uint32_t)enc
->codec_tag
); /* codec ID */
60 put_be32(pb
, enc
->sample_rate
);
61 put_be32(pb
, (uint32_t)enc
->channels
);
65 static int au_write_header(AVFormatContext
*s
)
67 ByteIOContext
*pb
= s
->pb
;
72 if (put_au_header(pb
, s
->streams
[0]->codec
) < 0) {
81 static int au_write_packet(AVFormatContext
*s
, AVPacket
*pkt
)
83 ByteIOContext
*pb
= s
->pb
;
84 put_buffer(pb
, pkt
->data
, pkt
->size
);
88 static int au_write_trailer(AVFormatContext
*s
)
90 ByteIOContext
*pb
= s
->pb
;
93 if (!url_is_streamed(s
->pb
)) {
95 /* update file size */
96 file_size
= url_ftell(pb
);
97 url_fseek(pb
, 8, SEEK_SET
);
98 put_be32(pb
, (uint32_t)(file_size
- 24));
99 url_fseek(pb
, file_size
, SEEK_SET
);
101 put_flush_packet(pb
);
106 #endif /* CONFIG_AU_MUXER */
108 static int au_probe(AVProbeData
*p
)
110 /* check file header */
111 if (p
->buf
[0] == '.' && p
->buf
[1] == 's' &&
112 p
->buf
[2] == 'n' && p
->buf
[3] == 'd')
113 return AVPROBE_SCORE_MAX
;
119 static int au_read_header(AVFormatContext
*s
,
120 AVFormatParameters
*ap
)
124 ByteIOContext
*pb
= s
->pb
;
125 unsigned int id
, codec
, channels
, rate
;
128 /* check ".snd" header */
130 if (tag
!= MKTAG('.', 's', 'n', 'd'))
132 size
= get_be32(pb
); /* header size */
133 get_be32(pb
); /* data size */
137 channels
= get_be32(pb
);
139 codec
= codec_get_id(codec_au_tags
, id
);
142 /* skip unused data */
143 url_fseek(pb
, size
- 24, SEEK_CUR
);
146 /* now we are ready: build format streams */
147 st
= av_new_stream(s
, 0);
150 st
->codec
->codec_type
= CODEC_TYPE_AUDIO
;
151 st
->codec
->codec_tag
= id
;
152 st
->codec
->codec_id
= codec
;
153 st
->codec
->channels
= channels
;
154 st
->codec
->sample_rate
= rate
;
155 av_set_pts_info(st
, 64, 1, rate
);
159 #define MAX_SIZE 4096
161 static int au_read_packet(AVFormatContext
*s
,
168 ret
= av_get_packet(s
->pb
, pkt
, MAX_SIZE
);
171 pkt
->stream_index
= 0;
173 /* note: we need to modify the packet size here to handle the last
179 #ifdef CONFIG_AU_DEMUXER
180 AVInputFormat au_demuxer
= {
182 NULL_IF_CONFIG_SMALL("SUN AU format"),
189 .codec_tag
= (const AVCodecTag
* const []){codec_au_tags
, 0},
193 #ifdef CONFIG_AU_MUXER
194 AVOutputFormat au_muxer
= {
196 NULL_IF_CONFIG_SMALL("SUN AU format"),
205 .codec_tag
= (const AVCodecTag
* const []){codec_au_tags
, 0},
207 #endif //CONFIG_AU_MUXER