X-Git-Url: https://hackdaworld.org/gitweb/?p=my-code%2Fivac.git;a=blobdiff_plain;f=src%2Faudio.c;fp=src%2Faudio.c;h=9c8ca4a8e5984eeb1d039519a993eeb869940489;hp=bd4764491e07195b18056f261f09c576f24b7b00;hb=51804c822aba850ad3d1589b4dc3dc2709d980f5;hpb=16b3789b687a3002b80a38f58c07b7a46ac89c6c

diff --git a/src/audio.c b/src/audio.c
index bd47644..9c8ca4a 100644
--- a/src/audio.c
+++ b/src/audio.c
@@ -10,14 +10,114 @@ int audio_init(t_audio *audio) {
 
   puts("[audio] initializing audio ...");
 
-  if((audio->fd=open(audio->device,O_RDONLY))==-1) {
+  if((audio->dsp_fd=open(audio->dsp_dev,O_RDWR))==-1) {
     perror("[audio] open call");
     return A_ERROR;
   }
 
-  if(ioctl(audio->fd,SNDCTL_DSP_GETCAPS,&(audio->cap))==-1) {
+  if(ioctl(audio->dsp_fd,SNDCTL_DSP_GETCAPS,&(audio->dsp_cap))==-1) {
     perror("[audio] ioctl call");
     return A_ERROR;
   }
 
-  
+  if(!(audio->dsp_cap&DSP_CAP_DUPLEX)) {
+    puts("[audio] no duplex support");
+    return A_ERROR;
+  }
+
+  return A_SUCCESS;
+}
+
+int audio_setup(t_audio *audio) {
+
+  int tmp;
+
+  puts("[audio] setting up sound device & allocating record/playback buffer");
+
+  tmp=audio->fmt;
+  if(ioctl(audio->dsp_fd,SNDCTL_DSP_SETFMT,&tmp)==-1) {
+    perror("[audio] ioctl call (SNDCTL_DSP_SETFMT)");
+    return A_ERROR;
+  }
+  if(tmp!=audio->fmt) {
+    puts("[audio] FMT not supported");
+    return A_ERROR;
+  }
+
+  tmp=audio->speed;
+  if(ioctl(audio->dsp_fd,SNDCTL_DSP_SPEED,&tmp)==-1) {
+    perror("[audio] ioctl call (SNDCTL_DSP_SPEED)");
+    return A_ERROR;
+  }
+  if(tmp!=audio->speed) {
+    puts("[audio] SPEED not supported");
+    return A_ERROR;
+  }
+
+  if(ioctl(audio->dsp_fd,SNDCTL_DSP_GETBLKSIZE,&(audio->blksize))==-1) {
+    perror("[audio] ioctl call (SNDCTL_DSP_GETBLKSIZE)");
+    return A_ERROR;
+  }
+
+  if((audio->play_data=(unsigned char *)malloc(audio->blksize))==NULL) {
+    perror("[audio] malloc call");
+    return A_ERROR;
+  }
+  if((audio->rec_data=(unsigned char *)malloc(audio->blksize))==NULL) {
+    perror("[audio] malloc call");
+    return A_ERROR;
+  }
+
+  return A_SUCCESS;
+}
+
+int audio_shutdown(t_audio *audio) {
+
+  puts("[audio] shutdown");
+
+  free(audio->play_data);
+  free(audio->rec_data);
+
+  if(close(audio->dsp_fd)==-1) {
+    perror("[audio] close call");
+    return A_ERROR;
+  }
+
+  return A_SUCCESS;
+}
+
+int audio_play(t_audio *audio,int len) {
+
+  int count,left;
+
+  count=0;
+  left=len;
+
+  while(left) {
+    if((count=write(audio->dsp_fd,audio->play_data+len-left,left))==-1) {
+      perror("[audio] write call");
+      return A_ERROR;
+    }
+    left-=count;
+  }
+
+  return A_SUCCESS;
+}
+
+int audio_record(t_audio *audio,int len) {
+
+  int count,left;
+
+  count=0;
+  left=len;
+
+  while(left) {
+    if((count=read(audio->dsp_fd,audio->rec_data+len-left,left))==-1) {
+      perror("[audio] read call");
+      return A_ERROR;
+    }
+    left-=count;
+  }
+
+  return A_SUCCESS;
+}