Add missing #includes for avutil.h, required for the AV_VERSION* macros.
[ffmpeg-lucabe.git] / libavformat / au.c
blob7f119e9a4cf7839fdd7bb4b5321092dac5bcdd5a
1 /*
2 * AU muxer and demuxer
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
30 #include "avformat.h"
31 #include "raw.h"
32 #include "riff.h"
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 },
47 { CODEC_ID_NONE, 0 },
50 #if CONFIG_AU_MUXER
51 /* AUDIO_FILE header */
52 static int put_au_header(ByteIOContext *pb, AVCodecContext *enc)
54 if(!enc->codec_tag)
55 return -1;
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);
62 return 0;
65 static int au_write_header(AVFormatContext *s)
67 ByteIOContext *pb = s->pb;
69 s->priv_data = NULL;
71 /* format header */
72 if (put_au_header(pb, s->streams[0]->codec) < 0) {
73 return -1;
76 put_flush_packet(pb);
78 return 0;
81 static int au_write_packet(AVFormatContext *s, AVPacket *pkt)
83 ByteIOContext *pb = s->pb;
84 put_buffer(pb, pkt->data, pkt->size);
85 return 0;
88 static int au_write_trailer(AVFormatContext *s)
90 ByteIOContext *pb = s->pb;
91 int64_t file_size;
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);
104 return 0;
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;
114 else
115 return 0;
118 /* au input */
119 static int au_read_header(AVFormatContext *s,
120 AVFormatParameters *ap)
122 int size;
123 unsigned int tag;
124 ByteIOContext *pb = s->pb;
125 unsigned int id, channels, rate;
126 enum CodecID codec;
127 AVStream *st;
129 /* check ".snd" header */
130 tag = get_le32(pb);
131 if (tag != MKTAG('.', 's', 'n', 'd'))
132 return -1;
133 size = get_be32(pb); /* header size */
134 get_be32(pb); /* data size */
136 id = get_be32(pb);
137 rate = get_be32(pb);
138 channels = get_be32(pb);
140 codec = ff_codec_get_id(codec_au_tags, id);
142 if (size >= 24) {
143 /* skip unused data */
144 url_fseek(pb, size - 24, SEEK_CUR);
147 /* now we are ready: build format streams */
148 st = av_new_stream(s, 0);
149 if (!st)
150 return -1;
151 st->codec->codec_type = CODEC_TYPE_AUDIO;
152 st->codec->codec_tag = id;
153 st->codec->codec_id = codec;
154 st->codec->channels = channels;
155 st->codec->sample_rate = rate;
156 av_set_pts_info(st, 64, 1, rate);
157 return 0;
160 #define MAX_SIZE 4096
162 static int au_read_packet(AVFormatContext *s,
163 AVPacket *pkt)
165 int ret;
167 ret= av_get_packet(s->pb, pkt, MAX_SIZE);
168 if (ret < 0)
169 return ret;
170 pkt->stream_index = 0;
172 /* note: we need to modify the packet size here to handle the last
173 packet */
174 pkt->size = ret;
175 return 0;
178 #if CONFIG_AU_DEMUXER
179 AVInputFormat au_demuxer = {
180 "au",
181 NULL_IF_CONFIG_SMALL("SUN AU format"),
183 au_probe,
184 au_read_header,
185 au_read_packet,
186 NULL,
187 pcm_read_seek,
188 .codec_tag= (const AVCodecTag* const []){codec_au_tags, 0},
190 #endif
192 #if CONFIG_AU_MUXER
193 AVOutputFormat au_muxer = {
194 "au",
195 NULL_IF_CONFIG_SMALL("SUN AU format"),
196 "audio/basic",
197 "au",
199 CODEC_ID_PCM_S16BE,
200 CODEC_ID_NONE,
201 au_write_header,
202 au_write_packet,
203 au_write_trailer,
204 .codec_tag= (const AVCodecTag* const []){codec_au_tags, 0},
206 #endif //CONFIG_AU_MUXER