Initial revision

src/pcm/Makefile

@@ -0,0 +1,40 @@
+#
+# Makefile for ALSA library
+# Copyright (c) 1994-98 by Jaroslav Kysela <perex@jcu.cz>
+#
+
+include ../../Makefile.conf
+
+TARGET=libpcm.a
+STARGET=libpcm.Sa
+OBJECTS=pcm.o
+SOBJECTS=pcm.So
+TARGETS=$(TARGET) $(STARGET)
+
+.SUFFIXES: .c .s .S .o .So .a .Sa
+
+.c.o:
+	$(CC) $(COPTS) $(INCLUDE) -c -o $*.o $<
+.c.So:
+	$(CC) $(COPTS) $(INCLUDE) -fPIC -c -o $*.So $<
+
+all: $(TARGETS)	
+
+$(TARGET): .depend $(OBJECTS)
+	$(LINKER) -r -o $@ $(OBJECTS)
+
+$(STARGET): .depend $(SOBJECTS)
+	$(LINKER) -r -o $@ $(SOBJECTS)
+
+clean:
+	rm -f core .depend *.o *.So *.a *.Sa *.orig *~
+
+.depend:
+	$(CPP) $(COPTS) $(INCLUDE) -M *.c > .depend
+
+#
+# include a dependency file if one exists
+#
+ifeq (.depend,$(wildcard .depend))
+include .depend
+endif

src/pcm/pcm.c

@@ -0,0 +1,265 @@
+/*
+ *  PCM Interface - main file
+ *  Copyright (c) 1998 by Jaroslav Kysela <perex@jcu.cz>
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <sys/ioctl.h>
+#include "soundlib.h"
+
+#define SND_FILE_PCM		"/dev/sndpcm%i%i"
+#define SND_CTL_VERSION_MAX	SND_PROTOCOL_VERSION( 1, 0, 0 )
+ 
+typedef struct {
+  int card;
+  int device;
+  int fd;
+} snd_pcm_t;
+ 
+int snd_pcm_open( void **handle, int card, int device, int mode )
+{
+  int fd, ver;
+  char filename[32];
+  snd_pcm_t *pcm;
+
+  *handle = NULL;
+  if ( card < 0 || card >= SND_CARDS ) return -EINVAL;
+  sprintf( filename, SND_FILE_PCM, card, device );
+  if ( (fd = open( filename, mode )) < 0 ) return -errno;
+  if ( ioctl( fd, SND_PCM_IOCTL_PVERSION, &ver ) < 0 ) {
+    close( fd );
+    return -errno;
+  }
+  if ( ver > SND_CTL_VERSION_MAX ) return -SND_ERROR_UNCOMPATIBLE_VERSION;
+  pcm = (snd_pcm_t *)calloc( 1, sizeof( snd_pcm_t ) );
+  if ( pcm == NULL ) {
+    close( fd );
+    return -ENOMEM;
+  }
+  pcm -> card = card;
+  pcm -> device = device;
+  pcm -> fd = fd;
+  *handle = pcm;
+  return 0;
+}
+
+int snd_pcm_close( void *handle )
+{
+  snd_pcm_t *pcm;
+  int res;
+  
+  pcm = (snd_pcm_t *)handle;
+  if ( !pcm ) return -EINVAL;
+  res = close( pcm -> fd ) < 0 ? -errno : 0;
+  free( pcm );
+  return res;
+}
+
+int snd_pcm_file_descriptor( void *handle )
+{
+  snd_pcm_t *pcm;
+  
+  pcm = (snd_pcm_t *)handle;
+  if ( !pcm ) return -EINVAL;
+  return pcm -> fd;
+}
+
+int snd_pcm_block_mode( void *handle, int enable )
+{
+  snd_pcm_t *pcm;
+  long flags;
+  
+  pcm = (snd_pcm_t *)handle;
+  if ( !pcm ) return -EINVAL;
+  if ( fcntl( pcm -> fd, F_GETFL, &flags ) < 0 )
+    return -errno;
+  if ( enable )
+    flags |= O_NONBLOCK;
+   else
+    flags &= ~O_NONBLOCK;
+  if ( fcntl( pcm -> fd, F_SETFL, &flags ) < 0 )
+    return -errno;
+  return 0;
+}
+
+int snd_pcm_info( void *handle, snd_pcm_info_t *info )
+{
+  snd_pcm_t *pcm;
+  
+  pcm = (snd_pcm_t *)handle;
+  if ( !pcm ) return -EINVAL;
+  if ( ioctl( pcm -> fd, SND_PCM_IOCTL_INFO, info ) < 0 )
+    return -errno;
+  return 0;
+}
+
+int snd_pcm_playback_info( void *handle, snd_pcm_playback_info_t *info )
+{
+  snd_pcm_t *pcm;
+  
+  pcm = (snd_pcm_t *)handle;
+  if ( !pcm ) return -EINVAL;
+  if ( ioctl( pcm -> fd, SND_PCM_IOCTL_PLAYBACK_INFO, info ) < 0 )
+    return -errno;
+  return 0;
+}
+
+int snd_pcm_record_info( void *handle, snd_pcm_record_info_t *info )
+{
+  snd_pcm_t *pcm;
+  
+  pcm = (snd_pcm_t *)handle;
+  if ( !pcm ) return -EINVAL;
+  if ( ioctl( pcm -> fd, SND_PCM_IOCTL_RECORD_INFO, info ) < 0 )
+    return -errno;
+  return 0;
+}
+
+int snd_pcm_playback_format( void *handle, snd_pcm_format_t *format )
+{
+  snd_pcm_t *pcm;
+  
+  pcm = (snd_pcm_t *)handle;
+  if ( !pcm ) return -EINVAL;
+  if ( ioctl( pcm -> fd, SND_PCM_IOCTL_PLAYBACK_FORMAT, format ) < 0 )
+    return -errno;
+  return 0;
+}
+
+int snd_pcm_record_format( void *handle, snd_pcm_format_t *format )
+{
+  snd_pcm_t *pcm;
+  
+  pcm = (snd_pcm_t *)handle;
+  if ( !pcm ) return -EINVAL;
+  if ( ioctl( pcm -> fd, SND_PCM_IOCTL_RECORD_FORMAT, format ) < 0 )
+    return -errno;
+  return 0;
+}
+
+int snd_pcm_playback_params( void *handle, snd_pcm_playback_params_t *params )
+{
+  snd_pcm_t *pcm;
+  
+  pcm = (snd_pcm_t *)handle;
+  if ( !pcm ) return -EINVAL;
+  if ( ioctl( pcm -> fd, SND_PCM_IOCTL_PLAYBACK_PARAMS, params ) < 0 )
+    return -errno;
+  return 0;
+}
+
+int snd_pcm_record_params( void *handle, snd_pcm_record_params_t *params )
+{
+  snd_pcm_t *pcm;
+  
+  pcm = (snd_pcm_t *)handle;
+  if ( !pcm ) return -EINVAL;
+  if ( ioctl( pcm -> fd, SND_PCM_IOCTL_RECORD_PARAMS, params ) < 0 )
+    return -errno;
+  return 0;
+}
+
+int snd_pcm_playback_status( void *handle, snd_pcm_playback_status_t *status )
+{
+  snd_pcm_t *pcm;
+  
+  pcm = (snd_pcm_t *)handle;
+  if ( !pcm ) return -EINVAL;
+  if ( ioctl( pcm -> fd, SND_PCM_IOCTL_PLAYBACK_STATUS, status ) < 0 )
+    return -errno;
+  return 0;
+}
+
+int snd_pcm_record_status( void *handle, snd_pcm_record_status_t *status )
+{
+  snd_pcm_t *pcm;
+  
+  pcm = (snd_pcm_t *)handle;
+  if ( !pcm ) return -EINVAL;
+  if ( ioctl( pcm -> fd, SND_PCM_IOCTL_RECORD_STATUS, status ) < 0 )
+    return -errno;
+  return 0;
+}
+
+int snd_pcm_drain_playback( void *handle )
+{
+  snd_pcm_t *pcm;
+  
+  pcm = (snd_pcm_t *)handle;
+  if ( !pcm ) return -EINVAL;
+  if ( ioctl( pcm -> fd, SND_PCM_IOCTL_DRAIN_PLAYBACK ) < 0 )
+    return -errno;
+  return 0;
+}
+
+int snd_pcm_flush_playback( void *handle )
+{
+  snd_pcm_t *pcm;
+  
+  pcm = (snd_pcm_t *)handle;
+  if ( !pcm ) return -EINVAL;
+  if ( ioctl( pcm -> fd, SND_PCM_IOCTL_FLUSH_PLAYBACK ) < 0 )
+    return -errno;
+  return 0;
+}
+
+int snd_pcm_flush_record( void *handle )
+{
+  snd_pcm_t *pcm;
+  
+  pcm = (snd_pcm_t *)handle;
+  if ( !pcm ) return -EINVAL;
+  if ( ioctl( pcm -> fd, SND_PCM_IOCTL_FLUSH_RECORD ) < 0 )
+    return -errno;
+  return 0;
+}
+
+int snd_pcm_playback_time( void *handle, int enable )
+{
+  snd_pcm_t *pcm;
+  
+  pcm = (snd_pcm_t *)handle;
+  if ( !pcm ) return -EINVAL;
+  if ( ioctl( pcm -> fd, SND_PCM_IOCTL_PLAYBACK_TIME, &enable ) < 0 )
+    return -errno;
+  return 0;
+}
+
+int snd_pcm_record_time( void *handle, int enable )
+{
+  snd_pcm_t *pcm;
+  
+  pcm = (snd_pcm_t *)handle;
+  if ( !pcm ) return -EINVAL;
+  if ( ioctl( pcm -> fd, SND_PCM_IOCTL_RECORD_TIME, &enable ) < 0 )
+    return -errno;
+  return 0;
+}
+
+ssize_t snd_pcm_write( void *handle, const void *buffer, size_t size )
+{
+  snd_pcm_t *pcm;
+  ssize_t result;
+  
+  pcm = (snd_pcm_t *)handle;
+  if ( !pcm ) return -EINVAL;
+  result = write( pcm -> fd, buffer, size );
+  if ( result < 0 ) return -errno;
+  return result;
+}
+
+ssize_t snd_pcm_read( void *handle, void *buffer, size_t size )
+{
+  snd_pcm_t *pcm;
+  ssize_t result;
+  
+  pcm = (snd_pcm_t *)handle;
+  if ( !pcm ) return -EINVAL;
+  result = read( pcm -> fd, buffer, size );
+  if ( result < 0 ) return -errno;
+  return result;
+}