audio out drivers

git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@955 b3059339-0415-0410-9bf9-f77b7e298cf2

6 files changed, 425 insertions, 0 deletions

diff --git a/libao2/Makefile b/libao2/Makefile
new file mode 100644
index 0000000000..c726ab42de
--- /dev/null
+++ b/libao2/Makefile
@@ -0,0 +1,41 @@
+
+include ../config.mak
+
+LIBNAME = libao.a
+
+SRCS=audio_out.c ao_oss.c ao_null.c
+OBJS=$(SRCS:.c=.o)
+
+CFLAGS  = $(OPTFLAGS) -I. -I..
+# -I/usr/X11R6/include/
+
+.SUFFIXES: .c .o
+
+# .PHONY: all clean
+
+.c.o:
+	$(CC) -c $(CFLAGS) -o $@ $<
+
+$(LIBNAME):     .depend $(OBJS)
+	$(AR) r $(LIBNAME) $(OBJS)
+
+all:    $(LIBNAME)
+
+clean:
+	rm -f *.o *.a *~
+
+distclean:
+	rm -f Makefile.bak *.o *.a *~ .depend
+
+dep:    depend
+depend: .depend
+
+.depend: Makefile ../config.mak ../config.h
+	$(CC) -MM $(CFLAGS) $(SRCS) 1>.depend
+
+#
+# include dependency files if they exist
+#
+ifneq ($(wildcard .depend),)
+include .depend
+endif
diff --git a/libao2/ao_null.c b/libao2/ao_null.c
new file mode 100644
index 0000000000..d48667757f
--- /dev/null
+++ b/libao2/ao_null.c
@@ -0,0 +1,73 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "audio_out.h"
+#include "audio_out_internal.h"
+
+static ao_info_t info = 
+{
+	"Null audio output",
+	"null",
+	"A'rpi",
+	""
+};
+
+LIBAO_EXTERN(null)
+
+// there are some globals:
+// ao_samplerate
+// ao_channels
+// ao_format
+// ao_bps
+// ao_outburst
+// ao_buffersize
+
+// to set/get/query special features/parameters
+static int control(int cmd,int arg){
+    return -1;
+}
+
+// open & setup audio device
+// return: 1=success 0=fail
+static int init(int rate,int channels,int format,int flags){
+
+    ao_outburst=4096;
+
+    return 0;
+}
+
+// close audio device
+static void uninit(){
+
+}
+
+// stop playing and empty buffers (for seeking/pause)
+static void reset(){
+
+}
+
+// return: how many bytes can be played without blocking
+static int get_space(){
+
+    return ao_outburst;
+}
+
+// plays 'len' bytes of 'data'
+// it should round it down to outburst*n
+// return: number of bytes played
+static int play(void* data,int len,int flags){
+
+    return len;
+}
+
+// return: how many unplayed bytes are in the buffer
+static int get_delay(){
+
+    return 0;
+}
+
+
+
+
+
+
diff --git a/libao2/ao_oss.c b/libao2/ao_oss.c
new file mode 100644
index 0000000000..4c35bb4cfc
--- /dev/null
+++ b/libao2/ao_oss.c
@@ -0,0 +1,191 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+#include <sys/ioctl.h>
+#include <unistd.h>
+#include <sys/time.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <sys/soundcard.h>
+
+#include "../config.h"
+
+#include "audio_out.h"
+#include "audio_out_internal.h"
+
+static ao_info_t info = 
+{
+	"OSS/ioctl audio output",
+	"null",
+	"A'rpi",
+	""
+};
+
+LIBAO_EXTERN(oss)
+
+// there are some globals:
+// ao_samplerate
+// ao_channels
+// ao_format
+// ao_bps
+// ao_outburst
+// ao_buffersize
+
+static char* dsp="/dev/dsp";
+static int audio_fd=-1;
+static audio_buf_info zz;
+
+// to set/get/query special features/parameters
+static int control(int cmd,int arg){
+    switch(cmd){
+	case AOCONTROL_SET_DEVICE:
+	    dsp=(char*)arg;
+	    return CONTROL_OK;
+	case AOCONTROL_QUERY_FORMAT:
+	    return CONTROL_TRUE;
+    }
+    return CONTROL_UNKNOWN;
+}
+
+// open & setup audio device
+// return: 1=success 0=fail
+static int init(int rate,int channels,int format,int flags){
+
+  printf("ao2: %d Hz  %d chans  0x%X\n",rate,channels,format);
+
+  audio_fd=open(dsp, O_WRONLY);
+  if(audio_fd<0){
+    printf("Can't open audio device %s  -> nosound\n",dsp);
+    return 0;
+  }
+
+  ao_format=format;
+  ioctl (audio_fd, SNDCTL_DSP_SETFMT, &ao_format);
+  printf("audio_setup: sample format: 0x%X  (requested: 0x%X)\n",ao_format,format);
+  
+  ao_channels=channels-1;
+  ioctl (audio_fd, SNDCTL_DSP_STEREO, &ao_channels);
+  
+  // set rate
+  ao_samplerate=rate;
+  ioctl (audio_fd, SNDCTL_DSP_SPEED, &ao_samplerate);
+  printf("audio_setup: using %d Hz samplerate (requested: %d)\n",ao_samplerate,rate);
+
+  if(ioctl(audio_fd, SNDCTL_DSP_GETOSPACE, &zz)==-1){
+      int r=0;
+      printf("audio_setup: driver doesn't support SNDCTL_DSP_GETOSPACE :-(\n");
+      if(ioctl(audio_fd, SNDCTL_DSP_GETBLKSIZE, &r)==-1){
+          printf("audio_setup: %d bytes/frag (config.h)\n",ao_outburst);
+      } else {
+          ao_outburst=r;
+          printf("audio_setup: %d bytes/frag (GETBLKSIZE)\n",ao_outburst);
+      }
+  } else {
+      printf("audio_setup: frags: %3d/%d  (%d bytes/frag)  free: %6d\n",
+          zz.fragments, zz.fragstotal, zz.fragsize, zz.bytes);
+      if(ao_buffersize==-1) ao_buffersize=zz.bytes;
+      ao_outburst=zz.fragsize;
+  }
+
+  if(ao_buffersize==-1){
+    // Measuring buffer size:
+    void* data;
+    ao_buffersize=0;
+#ifdef HAVE_AUDIO_SELECT
+    data=malloc(ao_outburst); memset(data,0,ao_outburst);
+    while(ao_buffersize<0x40000){
+      fd_set rfds;
+      struct timeval tv;
+      FD_ZERO(&rfds); FD_SET(audio_fd,&rfds);
+      tv.tv_sec=0; tv.tv_usec = 0;
+      if(!select(audio_fd+1, NULL, &rfds, NULL, &tv)) break;
+      write(audio_fd,data,ao_outburst);
+      ao_buffersize+=ao_outburst;
+    }
+    free(data);
+    if(ao_buffersize==0){
+        printf("\n   ***  Your audio driver DOES NOT support select()  ***\n");
+          printf("Recompile mplayer with #undef HAVE_AUDIO_SELECT in config.h !\n\n");
+        return 0;
+    }
+#endif
+  }
+
+    return 1;
+}
+
+// close audio device
+static void uninit(){
+    ioctl(audio_fd, SNDCTL_DSP_RESET, NULL);
+    close(audio_fd);
+}
+
+// stop playing and empty buffers (for seeking/pause)
+static void reset(){
+    uninit();
+    audio_fd=open(dsp, O_WRONLY);
+    if(audio_fd<0){
+	printf("\nFatal error: *** CANNOT RE-OPEN / RESET AUDIO DEVICE ***\n");
+	return;
+    }
+
+  ioctl (audio_fd, SNDCTL_DSP_SETFMT, &ao_format);
+  ioctl (audio_fd, SNDCTL_DSP_STEREO, &ao_channels);
+  ioctl (audio_fd, SNDCTL_DSP_SPEED, &ao_samplerate);
+
+}
+
+// return: how many bytes can be played without blocking
+static int get_space(){
+  int playsize=ao_outburst;
+
+  if(ioctl(audio_fd, SNDCTL_DSP_GETOSPACE, &zz)!=-1){
+      // calculate exact buffer space:
+      return zz.fragments*zz.fragsize;
+  }
+
+    // check buffer
+#ifdef HAVE_AUDIO_SELECT
+    {  fd_set rfds;
+       struct timeval tv;
+       FD_ZERO(&rfds);
+       FD_SET(audio_fd, &rfds);
+       tv.tv_sec = 0;
+       tv.tv_usec = 0;
+       if(!select(audio_fd+1, NULL, &rfds, NULL, &tv)) return 0; // not block!
+    }
+#endif
+
+    return ao_outburst;
+}
+
+// plays 'len' bytes of 'data'
+// it should round it down to outburst*n
+// return: number of bytes played
+static int play(void* data,int len,int flags){
+    len/=ao_outburst;
+    len=write(audio_fd,data,len*ao_outburst);
+    return len;
+}
+
+static int audio_delay_method=2;
+
+// return: how many unplayed bytes are in the buffer
+static int get_delay(){
+  if(audio_delay_method==2){
+      // 
+      int r=0;
+      if(ioctl(audio_fd, SNDCTL_DSP_GETODELAY, &r)!=-1)
+         return r;
+      audio_delay_method=1; // fallback if not supported
+  }
+  if(audio_delay_method==1){
+      // SNDCTL_DSP_GETOSPACE
+      if(ioctl(audio_fd, SNDCTL_DSP_GETOSPACE, &zz)!=-1)
+         return ao_buffersize-zz.bytes;
+      audio_delay_method=0; // fallback if not supported
+  }
+  return ao_buffersize;
+}
+
diff --git a/libao2/audio_out.c b/libao2/audio_out.c
new file mode 100644
index 0000000000..0e54a62672
--- /dev/null
+++ b/libao2/audio_out.c
@@ -0,0 +1,29 @@
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "../config.h"
+
+#include "audio_out.h"
+
+// there are some globals:
+int ao_samplerate=0;
+int ao_channels=0;
+int ao_format=0;
+int ao_bps=0;
+int ao_outburst=OUTBURST; // config.h default
+int ao_buffersize=-1;
+
+extern ao_functions_t audio_out_oss;
+//extern ao_functions_t audio_out_ossold;
+//extern ao_functions_t audio_out_alsa;
+//extern ao_functions_t audio_out_esd;
+extern ao_functions_t audio_out_null;
+
+ao_functions_t* audio_out_drivers[] =
+{
+        &audio_out_oss,
+        &audio_out_null,
+	NULL
+};
+
diff --git a/libao2/audio_out.h b/libao2/audio_out.h
new file mode 100644
index 0000000000..cdd58dc7d4
--- /dev/null
+++ b/libao2/audio_out.h
@@ -0,0 +1,68 @@
+
+typedef struct ao_info_s
+{
+        /* driver name ("Matrox Millennium G200/G400" */
+        const char *name;
+        /* short name (for config strings) ("mga") */
+        const char *short_name;
+        /* author ("Aaron Holtzman <aholtzma@ess.engr.uvic.ca>") */
+        const char *author;
+        /* any additional comments */
+        const char *comment;
+} ao_info_t;
+
+typedef struct ao_functions_s {
+
+	ao_info_t *info;
+
+        /*
+         */
+        int (*control)(int cmd,int arg);
+
+        /*
+         */
+        int (*init)(int rate,int channels,int format,int flags);
+
+        /*
+         */
+        void (*uninit)();
+
+        /*
+         */
+        void (*reset)();
+
+        /*
+         */
+        int (*get_space)();
+
+        /*
+         */
+        int (*play)(void* data,int len,int flags);
+
+        /*
+         */
+        int (*get_delay)();
+
+} ao_functions_t;
+
+// NULL terminated array of all drivers
+extern ao_functions_t* audio_out_drivers[];
+
+extern int ao_samplerate;
+extern int ao_channels;
+extern int ao_format;
+extern int ao_bps;
+extern int ao_outburst;
+extern int ao_buffersize;
+
+#define CONTROL_OK 1
+#define CONTROL_TRUE 1
+#define CONTROL_FALSE 0
+#define CONTROL_UNKNOWN -1
+#define CONTROL_ERROR -2
+#define CONTROL_NA -3
+
+#define AOCONTROL_SET_DEVICE 1
+#define AOCONTROL_QUERY_FORMAT 2
+
+
diff --git a/libao2/audio_out_internal.h b/libao2/audio_out_internal.h
new file mode 100644
index 0000000000..5899270af2
--- /dev/null
+++ b/libao2/audio_out_internal.h
@@ -0,0 +1,23 @@
+
+// prototypes:
+//static ao_info_t info;
+static int control(int cmd,int arg);
+static int init(int rate,int channels,int format,int flags);
+static void uninit();
+static void reset();
+static int get_space();
+static int play(void* data,int len,int flags);
+static int get_delay();
+
+#define LIBAO_EXTERN(x) ao_functions_t audio_out_##x =\
+{\
+	&info,\
+	control,\
+	init,\
+        uninit,\
+	reset,\
+	get_space,\
+	play,\
+	get_delay\
+};
+