mirror of https://github.com/mpv-player/mpv
audio out drivers
git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@955 b3059339-0415-0410-9bf9-f77b7e298cf2
This commit is contained in:
arpi_esp
parent
7c8bb6e4b9
commit
7a2eec4b59
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include ../config.mak
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LIBNAME = libao.a
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SRCS=audio_out.c ao_oss.c ao_null.c
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OBJS=$(SRCS:.c=.o)
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CFLAGS = $(OPTFLAGS) -I. -I..
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# -I/usr/X11R6/include/
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.SUFFIXES: .c .o
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# .PHONY: all clean
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.c.o:
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$(CC) -c $(CFLAGS) -o $@ $<
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$(LIBNAME): .depend $(OBJS)
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$(AR) r $(LIBNAME) $(OBJS)
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all: $(LIBNAME)
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clean:
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rm -f *.o *.a *~
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distclean:
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rm -f Makefile.bak *.o *.a *~ .depend
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dep: depend
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depend: .depend
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.depend: Makefile ../config.mak ../config.h
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$(CC) -MM $(CFLAGS) $(SRCS) 1>.depend
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#
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# include dependency files if they exist
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#
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ifneq ($(wildcard .depend),)
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include .depend
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endif
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#include <stdio.h>
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#include <stdlib.h>
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#include "audio_out.h"
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#include "audio_out_internal.h"
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static ao_info_t info =
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{
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"Null audio output",
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"null",
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"A'rpi",
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""
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};
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LIBAO_EXTERN(null)
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// there are some globals:
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// ao_samplerate
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// ao_channels
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// ao_format
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// ao_bps
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// ao_outburst
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// ao_buffersize
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// to set/get/query special features/parameters
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static int control(int cmd,int arg){
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return -1;
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}
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// open & setup audio device
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// return: 1=success 0=fail
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static int init(int rate,int channels,int format,int flags){
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ao_outburst=4096;
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return 0;
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}
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// close audio device
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static void uninit(){
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}
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// stop playing and empty buffers (for seeking/pause)
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static void reset(){
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}
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// return: how many bytes can be played without blocking
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static int get_space(){
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return ao_outburst;
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}
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// plays 'len' bytes of 'data'
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// it should round it down to outburst*n
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// return: number of bytes played
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static int play(void* data,int len,int flags){
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return len;
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}
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// return: how many unplayed bytes are in the buffer
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static int get_delay(){
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return 0;
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}
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#include <stdio.h>
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#include <stdlib.h>
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#include <sys/ioctl.h>
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#include <unistd.h>
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#include <sys/time.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <sys/soundcard.h>
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#include "../config.h"
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#include "audio_out.h"
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#include "audio_out_internal.h"
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static ao_info_t info =
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{
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"OSS/ioctl audio output",
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"null",
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"A'rpi",
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""
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};
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LIBAO_EXTERN(oss)
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// there are some globals:
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// ao_samplerate
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// ao_channels
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// ao_format
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// ao_bps
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// ao_outburst
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// ao_buffersize
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static char* dsp="/dev/dsp";
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static int audio_fd=-1;
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static audio_buf_info zz;
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// to set/get/query special features/parameters
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static int control(int cmd,int arg){
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switch(cmd){
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case AOCONTROL_SET_DEVICE:
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dsp=(char*)arg;
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return CONTROL_OK;
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case AOCONTROL_QUERY_FORMAT:
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return CONTROL_TRUE;
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}
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return CONTROL_UNKNOWN;
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}
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// open & setup audio device
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// return: 1=success 0=fail
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static int init(int rate,int channels,int format,int flags){
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printf("ao2: %d Hz %d chans 0x%X\n",rate,channels,format);
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audio_fd=open(dsp, O_WRONLY);
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if(audio_fd<0){
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printf("Can't open audio device %s -> nosound\n",dsp);
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return 0;
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}
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ao_format=format;
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ioctl (audio_fd, SNDCTL_DSP_SETFMT, &ao_format);
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printf("audio_setup: sample format: 0x%X (requested: 0x%X)\n",ao_format,format);
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ao_channels=channels-1;
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ioctl (audio_fd, SNDCTL_DSP_STEREO, &ao_channels);
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// set rate
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ao_samplerate=rate;
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ioctl (audio_fd, SNDCTL_DSP_SPEED, &ao_samplerate);
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printf("audio_setup: using %d Hz samplerate (requested: %d)\n",ao_samplerate,rate);
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if(ioctl(audio_fd, SNDCTL_DSP_GETOSPACE, &zz)==-1){
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int r=0;
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printf("audio_setup: driver doesn't support SNDCTL_DSP_GETOSPACE :-(\n");
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if(ioctl(audio_fd, SNDCTL_DSP_GETBLKSIZE, &r)==-1){
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printf("audio_setup: %d bytes/frag (config.h)\n",ao_outburst);
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} else {
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ao_outburst=r;
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printf("audio_setup: %d bytes/frag (GETBLKSIZE)\n",ao_outburst);
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}
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} else {
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printf("audio_setup: frags: %3d/%d (%d bytes/frag) free: %6d\n",
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zz.fragments, zz.fragstotal, zz.fragsize, zz.bytes);
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if(ao_buffersize==-1) ao_buffersize=zz.bytes;
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ao_outburst=zz.fragsize;
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}
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if(ao_buffersize==-1){
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// Measuring buffer size:
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void* data;
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ao_buffersize=0;
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#ifdef HAVE_AUDIO_SELECT
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data=malloc(ao_outburst); memset(data,0,ao_outburst);
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while(ao_buffersize<0x40000){
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fd_set rfds;
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struct timeval tv;
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FD_ZERO(&rfds); FD_SET(audio_fd,&rfds);
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tv.tv_sec=0; tv.tv_usec = 0;
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if(!select(audio_fd+1, NULL, &rfds, NULL, &tv)) break;
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write(audio_fd,data,ao_outburst);
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ao_buffersize+=ao_outburst;
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}
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free(data);
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if(ao_buffersize==0){
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printf("\n *** Your audio driver DOES NOT support select() ***\n");
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printf("Recompile mplayer with #undef HAVE_AUDIO_SELECT in config.h !\n\n");
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return 0;
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}
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#endif
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}
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return 1;
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}
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// close audio device
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static void uninit(){
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ioctl(audio_fd, SNDCTL_DSP_RESET, NULL);
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close(audio_fd);
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}
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// stop playing and empty buffers (for seeking/pause)
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static void reset(){
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uninit();
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audio_fd=open(dsp, O_WRONLY);
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if(audio_fd<0){
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printf("\nFatal error: *** CANNOT RE-OPEN / RESET AUDIO DEVICE ***\n");
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return;
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}
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ioctl (audio_fd, SNDCTL_DSP_SETFMT, &ao_format);
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ioctl (audio_fd, SNDCTL_DSP_STEREO, &ao_channels);
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ioctl (audio_fd, SNDCTL_DSP_SPEED, &ao_samplerate);
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}
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// return: how many bytes can be played without blocking
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static int get_space(){
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int playsize=ao_outburst;
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if(ioctl(audio_fd, SNDCTL_DSP_GETOSPACE, &zz)!=-1){
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// calculate exact buffer space:
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return zz.fragments*zz.fragsize;
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}
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// check buffer
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#ifdef HAVE_AUDIO_SELECT
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{ fd_set rfds;
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struct timeval tv;
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FD_ZERO(&rfds);
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FD_SET(audio_fd, &rfds);
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tv.tv_sec = 0;
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tv.tv_usec = 0;
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if(!select(audio_fd+1, NULL, &rfds, NULL, &tv)) return 0; // not block!
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}
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#endif
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return ao_outburst;
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}
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// plays 'len' bytes of 'data'
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// it should round it down to outburst*n
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// return: number of bytes played
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static int play(void* data,int len,int flags){
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len/=ao_outburst;
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len=write(audio_fd,data,len*ao_outburst);
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return len;
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}
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static int audio_delay_method=2;
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// return: how many unplayed bytes are in the buffer
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static int get_delay(){
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if(audio_delay_method==2){
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//
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int r=0;
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if(ioctl(audio_fd, SNDCTL_DSP_GETODELAY, &r)!=-1)
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return r;
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audio_delay_method=1; // fallback if not supported
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}
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if(audio_delay_method==1){
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// SNDCTL_DSP_GETOSPACE
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if(ioctl(audio_fd, SNDCTL_DSP_GETOSPACE, &zz)!=-1)
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return ao_buffersize-zz.bytes;
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audio_delay_method=0; // fallback if not supported
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}
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return ao_buffersize;
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}
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#include <stdio.h>
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#include <stdlib.h>
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#include "../config.h"
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#include "audio_out.h"
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// there are some globals:
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int ao_samplerate=0;
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int ao_channels=0;
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int ao_format=0;
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int ao_bps=0;
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int ao_outburst=OUTBURST; // config.h default
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int ao_buffersize=-1;
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extern ao_functions_t audio_out_oss;
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//extern ao_functions_t audio_out_ossold;
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//extern ao_functions_t audio_out_alsa;
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//extern ao_functions_t audio_out_esd;
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extern ao_functions_t audio_out_null;
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ao_functions_t* audio_out_drivers[] =
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{
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&audio_out_oss,
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&audio_out_null,
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NULL
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};
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typedef struct ao_info_s
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{
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/* driver name ("Matrox Millennium G200/G400" */
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const char *name;
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/* short name (for config strings) ("mga") */
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const char *short_name;
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/* author ("Aaron Holtzman <aholtzma@ess.engr.uvic.ca>") */
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const char *author;
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/* any additional comments */
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const char *comment;
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} ao_info_t;
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typedef struct ao_functions_s {
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ao_info_t *info;
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/*
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*/
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int (*control)(int cmd,int arg);
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/*
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*/
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int (*init)(int rate,int channels,int format,int flags);
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/*
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*/
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void (*uninit)();
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/*
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*/
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void (*reset)();
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/*
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*/
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int (*get_space)();
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/*
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*/
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int (*play)(void* data,int len,int flags);
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/*
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*/
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int (*get_delay)();
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} ao_functions_t;
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// NULL terminated array of all drivers
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extern ao_functions_t* audio_out_drivers[];
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extern int ao_samplerate;
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extern int ao_channels;
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extern int ao_format;
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extern int ao_bps;
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extern int ao_outburst;
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extern int ao_buffersize;
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#define CONTROL_OK 1
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#define CONTROL_TRUE 1
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#define CONTROL_FALSE 0
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#define CONTROL_UNKNOWN -1
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#define CONTROL_ERROR -2
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#define CONTROL_NA -3
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#define AOCONTROL_SET_DEVICE 1
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#define AOCONTROL_QUERY_FORMAT 2
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@ -0,0 +1,23 @@
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// prototypes:
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//static ao_info_t info;
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static int control(int cmd,int arg);
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static int init(int rate,int channels,int format,int flags);
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static void uninit();
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static void reset();
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static int get_space();
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static int play(void* data,int len,int flags);
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static int get_delay();
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#define LIBAO_EXTERN(x) ao_functions_t audio_out_##x =\
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{\
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&info,\
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control,\
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init,\
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uninit,\
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reset,\
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get_space,\
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play,\
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get_delay\
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};
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