Use enum typers instead of int.
[libav.git] / libavformat / au.c
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115329f1 1/*
7fbde343 2 * AU muxer and demuxer
19720f15 3 * Copyright (c) 2001 Fabrice Bellard.
6cea494e 4 *
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5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
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8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
b78e7197 10 * version 2.1 of the License, or (at your option) any later version.
6cea494e 11 *
b78e7197 12 * FFmpeg is distributed in the hope that it will be useful,
6cea494e 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
6cea494e 16 *
19720f15 17 * You should have received a copy of the GNU Lesser General Public
b78e7197 18 * License along with FFmpeg; if not, write to the Free Software
5509bffa 19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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20 */
21
22/*
23 * First version by Francois Revol revol@free.fr
24 *
25 * Reference documents:
26 * http://www.opengroup.org/public/pubs/external/auformat.html
27 * http://www.goice.co.jp/member/mo/formats/au.html
28 */
29
30#include "avformat.h"
7241a6bb 31#include "raw.h"
9d9f4119 32#include "riff.h"
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33
34/* if we don't know the size in advance */
9ff85412 35#define AU_UNKNOWN_SIZE ((uint32_t)(~0))
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36
37/* The ffmpeg codecs we support, and the IDs they have in the file */
7caf0cc6 38static const AVCodecTag codec_au_tags[] = {
6cea494e 39 { CODEC_ID_PCM_MULAW, 1 },
c5adfd64 40 { CODEC_ID_PCM_S8, 2 },
6cea494e 41 { CODEC_ID_PCM_S16BE, 3 },
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42 { CODEC_ID_PCM_S24BE, 4 },
43 { CODEC_ID_PCM_S32BE, 5 },
249f3243 44 { CODEC_ID_PCM_F32BE, 6 },
7b21690a 45 { CODEC_ID_PCM_F64BE, 7 },
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46 { CODEC_ID_PCM_ALAW, 27 },
47 { 0, 0 },
48};
49
8212568a 50#ifdef CONFIG_AU_MUXER
6cea494e 51/* AUDIO_FILE header */
c18a2692 52static int put_au_header(ByteIOContext *pb, AVCodecContext *enc)
6cea494e 53{
bd5a6020 54 if(!enc->codec_tag)
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55 return -1;
56 put_tag(pb, ".snd"); /* magic number */
57 put_be32(pb, 24); /* header size */
9ff85412 58 put_be32(pb, AU_UNKNOWN_SIZE); /* data size */
bd5a6020 59 put_be32(pb, (uint32_t)enc->codec_tag); /* codec ID */
6cea494e 60 put_be32(pb, enc->sample_rate);
0c1a9eda 61 put_be32(pb, (uint32_t)enc->channels);
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62 return 0;
63}
64
65static int au_write_header(AVFormatContext *s)
66{
899681cd 67 ByteIOContext *pb = s->pb;
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68
69 s->priv_data = NULL;
70
71 /* format header */
01f4895c 72 if (put_au_header(pb, s->streams[0]->codec) < 0) {
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73 return -1;
74 }
75
76 put_flush_packet(pb);
77
78 return 0;
79}
80
e928649b 81static int au_write_packet(AVFormatContext *s, AVPacket *pkt)
6cea494e 82{
899681cd 83 ByteIOContext *pb = s->pb;
e928649b 84 put_buffer(pb, pkt->data, pkt->size);
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85 return 0;
86}
87
88static int au_write_trailer(AVFormatContext *s)
89{
899681cd 90 ByteIOContext *pb = s->pb;
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91 offset_t file_size;
92
899681cd 93 if (!url_is_streamed(s->pb)) {
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94
95 /* update file size */
96 file_size = url_ftell(pb);
97 url_fseek(pb, 8, SEEK_SET);
0c1a9eda 98 put_be32(pb, (uint32_t)(file_size - 24));
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99 url_fseek(pb, file_size, SEEK_SET);
100
101 put_flush_packet(pb);
102 }
103
104 return 0;
105}
8212568a 106#endif /* CONFIG_AU_MUXER */
6cea494e 107
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108static int au_probe(AVProbeData *p)
109{
110 /* check file header */
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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;
116}
117
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118/* au input */
119static int au_read_header(AVFormatContext *s,
4986a429 120 AVFormatParameters *ap)
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121{
122 int size;
123 unsigned int tag;
899681cd 124 ByteIOContext *pb = s->pb;
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125 unsigned int id, channels, rate;
126 enum CodecID codec;
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127 AVStream *st;
128
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 */
115329f1 135
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136 id = get_be32(pb);
137 rate = get_be32(pb);
138 channels = get_be32(pb);
115329f1 139
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140 codec = codec_get_id(codec_au_tags, id);
141
142 if (size >= 24) {
143 /* skip unused data */
144 url_fseek(pb, size - 24, SEEK_CUR);
145 }
146
147 /* now we are ready: build format streams */
fa26a29d 148 st = av_new_stream(s, 0);
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149 if (!st)
150 return -1;
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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;
595bf4ef 156 av_set_pts_info(st, 64, 1, rate);
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157 return 0;
158}
159
160#define MAX_SIZE 4096
161
162static int au_read_packet(AVFormatContext *s,
94ef6864 163 AVPacket *pkt)
6cea494e 164{
94ef6864 165 int ret;
6cea494e 166
899681cd 167 if (url_feof(s->pb))
6f3e0b21 168 return AVERROR(EIO);
899681cd 169 ret= av_get_packet(s->pb, pkt, MAX_SIZE);
2692067a 170 if (ret < 0)
6f3e0b21 171 return AVERROR(EIO);
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172 pkt->stream_index = 0;
173
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174 /* note: we need to modify the packet size here to handle the last
175 packet */
176 pkt->size = ret;
94ef6864 177 return 0;
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178}
179
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180#ifdef CONFIG_AU_DEMUXER
181AVInputFormat au_demuxer = {
c9a65ca8 182 "au",
bde15e74 183 NULL_IF_CONFIG_SMALL("SUN AU format"),
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184 0,
185 au_probe,
186 au_read_header,
187 au_read_packet,
9b64a036 188 NULL,
4986a429 189 pcm_read_seek,
c1854592 190 .codec_tag= (const AVCodecTag* const []){codec_au_tags, 0},
c9a65ca8 191};
ff70e601 192#endif
c9a65ca8 193
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194#ifdef CONFIG_AU_MUXER
195AVOutputFormat au_muxer = {
6cea494e 196 "au",
bde15e74 197 NULL_IF_CONFIG_SMALL("SUN AU format"),
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198 "audio/basic",
199 "au",
c9a65ca8 200 0,
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201 CODEC_ID_PCM_S16BE,
202 CODEC_ID_NONE,
203 au_write_header,
204 au_write_packet,
205 au_write_trailer,
c1854592 206 .codec_tag= (const AVCodecTag* const []){codec_au_tags, 0},
6cea494e 207};
ff70e601 208#endif //CONFIG_AU_MUXER