Import madplay_0.15.2b.orig.tar.gz

[dgit import orig madplay_0.15.2b.orig.tar.gz]

1 files changed, 228 insertions, 0 deletions

diff --git a/audio_snd.c b/audio_snd.c
new file mode 100644
index 0000000..a8c3502
--- /dev/null
+++ b/audio_snd.c
@@ -0,0 +1,228 @@
+/*
+ * 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_snd.c,v 1.15 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"
+
+# define AUDIO_FILE_MAGIC	(('.' << 24) | ('s' << 16) | ('n' << 8) | 'd')
+# define AUDIO_UNKNOWN_SIZE	(~0)		/* (unsigned) -1 */
+# define AUDIO_ENCODING_MULAW_8	1		/* 8-bit ISDN mu-law */
+
+static FILE *outfile;
+
+static unsigned long data_len;
+
+static unsigned int config_channels;
+static unsigned int config_speed;
+static unsigned int config_precision;
+
+/*
+ * NAME:	int32()
+ * DESCRIPTION:	store 32-bit big-endian integer
+ */
+static
+void int32(unsigned char *ptr, unsigned long num)
+{
+  ptr[0] = num >> 24;
+  ptr[1] = num >> 16;
+  ptr[2] = num >>  8;
+  ptr[3] = num >>  0;
+}
+
+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;
+
+  data_len = 0;
+
+  config_channels  = 0;
+  config_speed     = 0;
+  config_precision = 0;
+
+  return 0;
+}
+
+static
+int config(struct audio_config *config)
+{
+  unsigned char header[24];
+
+  if (config_precision) {
+    /* it's not possible to change the format once set */
+
+    config->channels  = config_channels;
+    config->speed     = config_speed;
+    config->precision = config_precision;
+
+    return 0;
+  }
+
+  /* Sun/NeXT audio file header */
+
+  int32(&header[0],  AUDIO_FILE_MAGIC);		/* magic */
+  int32(&header[4],  sizeof(header));		/* hdr_size */
+  int32(&header[8],  AUDIO_UNKNOWN_SIZE);	/* data_size */
+  int32(&header[12], AUDIO_ENCODING_MULAW_8);	/* encoding */
+  int32(&header[16], config->speed);		/* sample_rate */
+  int32(&header[20], config->channels);		/* channels */
+
+  if (fwrite(header, sizeof(header), 1, outfile) != 1) {
+    audio_error = ":fwrite";
+    return -1;
+  }
+
+  data_len = 0;
+
+  /* require 8-bit depth for now */
+
+  config->precision = 8;
+
+  config_channels  = config->channels;
+  config_speed     = config->speed;
+  config_precision = config->precision;
+
+  return 0;
+}
+
+static
+int play(struct audio_play *play)
+{
+  unsigned char data[MAX_NSAMPLES * 2];
+  unsigned int len;
+
+  len = audio_pcm_mulaw(data, play->nsamples,
+			play->samples[0], play->samples[1],
+			play->mode, play->stats);
+
+  if (fwrite(data, play->samples[1] ? 2 : 1,
+	     play->nsamples, outfile) != play->nsamples) {
+    audio_error = ":fwrite";
+    return -1;
+  }
+
+  data_len += len;
+
+  return 0;
+}
+
+static
+int stop(struct audio_stop *stop)
+{
+  return 0;
+}
+
+static
+int patch_int32(long address, unsigned long num)
+{
+  unsigned char dword[4];
+
+  if (fseek(outfile, address, SEEK_SET) == -1) {
+    audio_error = ":fseek";
+    return -1;
+  }
+
+  int32(dword, num);
+
+  if (fwrite(dword, sizeof(dword), 1, outfile) != 1) {
+    audio_error = ":fwrite";
+    return -1;
+  }
+
+  if (fseek(outfile, 0, SEEK_END) == -1) {
+    audio_error = ":fseek";
+    return -1;
+  }
+
+  return 0;
+}
+
+static
+int finish(struct audio_finish *finish)
+{
+  int result = 0;
+
+  if (config_precision == 0) {
+    struct audio_config dummy;
+
+    /* write empty chunks */
+
+    dummy.command   = AUDIO_COMMAND_CONFIG;
+    dummy.channels  = 2;
+    dummy.speed     = 44100;
+    dummy.precision = 0;
+
+    result = config(&dummy);
+  }
+
+  if (result == 0)
+    patch_int32(8, data_len);
+
+  if (outfile != stdout &&
+      fclose(outfile) == EOF &&
+      result == 0) {
+    audio_error = ":fclose";
+    result = -1;
+  }
+
+  return result;
+}
+
+int audio_snd(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;
+}