File: audio_raw.c

package info (click to toggle)
madplay 0.15.2b-9
  • links: PTS
  • area: main
  • in suites: bullseye, sid
  • size: 3,208 kB
  • sloc: ansic: 17,882; sh: 9,397; makefile: 503; yacc: 288; sed: 16
file content (152 lines) | stat: -rw-r--r-- 3,086 bytes parent folder | download | duplicates (8)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
/*
 * madplay - MPEG audio decoder and player
 * Copyright (C) 2000-2004 Robert Leslie
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 * $Id: audio_raw.c,v 1.22 2004/01/23 09:41:31 rob Exp $
 */

# ifdef HAVE_CONFIG_H
#  include "config.h"
# endif

# include "global.h"

# include <stdio.h>
# include <string.h>
# include <mad.h>

# include "audio.h"

# if defined(WORDS_BIGENDIAN)
#  define audio_pcm_s32  audio_pcm_s32be
#  define audio_pcm_s24  audio_pcm_s24be
#  define audio_pcm_s16  audio_pcm_s16be
# else
#  define audio_pcm_s32  audio_pcm_s32le
#  define audio_pcm_s24  audio_pcm_s24le
#  define audio_pcm_s16  audio_pcm_s16le
# endif

static FILE *outfile;
static audio_pcmfunc_t *audio_pcm;

static
int init(struct audio_init *init)
{
  if (init->path && strcmp(init->path, "-") != 0) {
    outfile = fopen(init->path, "wb");
    if (outfile == 0) {
      audio_error = ":";
      return -1;
    }
  }
  else
    outfile = stdout;

  return 0;
}

static
int config(struct audio_config *config)
{
  unsigned int bitdepth;

  bitdepth = config->precision & ~7;
  if (bitdepth == 0)
    bitdepth = 16;
  else if (bitdepth > 32)
    bitdepth = 32;

  switch (config->precision = bitdepth) {
  case 8:
    audio_pcm = audio_pcm_u8;
    break;

  case 16:
    audio_pcm = audio_pcm_s16;
    break;

  case 24:
    audio_pcm = audio_pcm_s24;
    break;

  case 32:
    audio_pcm = audio_pcm_s32;
    break;
  }

  return 0;
}

static
int play(struct audio_play *play)
{
  unsigned char data[MAX_NSAMPLES * 4 * 2];
  unsigned int len;

  len = audio_pcm(data, play->nsamples, play->samples[0], play->samples[1],
		  play->mode, play->stats);

  if (fwrite(data, len, 1, outfile) != 1) {
    audio_error = ":fwrite";
    return -1;
  }

  return 0;
}

static
int stop(struct audio_stop *stop)
{
  return 0;
}

static
int finish(struct audio_finish *finish)
{
  if (outfile != stdout &&
      fclose(outfile) == EOF) {
    audio_error = ":fclose";
    return -1;
  }

  return 0;
}

int audio_raw(union audio_control *control)
{
  audio_error = 0;

  switch (control->command) {
  case AUDIO_COMMAND_INIT:
    return init(&control->init);

  case AUDIO_COMMAND_CONFIG:
    return config(&control->config);

  case AUDIO_COMMAND_PLAY:
    return play(&control->play);

  case AUDIO_COMMAND_STOP:
    return stop(&control->stop);

  case AUDIO_COMMAND_FINISH:
    return finish(&control->finish);
  }

  return 0;
}