mirror of https://github.com/mpv-player/mpv
318 lines
7.0 KiB
C
318 lines
7.0 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include <string.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 <unistd.h>
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#include <inttypes.h>
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#include "config.h"
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#ifdef HAVE_DVB_HEAD
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#define HAVE_DVB 1
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#endif
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#ifdef HAVE_DVB
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#include <sys/poll.h>
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#include <sys/ioctl.h>
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#endif
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#include "audio_out.h"
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#include "audio_out_internal.h"
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#include "libaf/af_format.h"
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#include "libmpdemux/mpeg_packetizer.h"
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#include "subopt-helper.h"
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#include "mp_msg.h"
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#include "help_mp.h"
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#ifdef HAVE_DVB
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#ifndef HAVE_DVB_HEAD
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#include <ost/audio.h>
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audioMixer_t dvb_mixer={255,255};
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#else
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#include <linux/dvb/audio.h>
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audio_mixer_t dvb_mixer={255,255};
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#endif
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#endif
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#define true 1
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#define false 0
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extern int vo_mpegpes_fd;
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int vo_mpegpes_fd2 = -1;
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#include <errno.h>
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static ao_info_t info =
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{
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#ifdef HAVE_DVB
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"DVB audio output",
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#else
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"Mpeg-PES audio output",
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#endif
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"mpegpes",
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"A'rpi",
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""
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};
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LIBAO_EXTERN(mpegpes)
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// to set/get/query special features/parameters
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static int control(int cmd,void *arg){
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#ifdef HAVE_DVB
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switch(cmd){
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case AOCONTROL_GET_VOLUME:
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if(vo_mpegpes_fd2>=0){
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((ao_control_vol_t*)(arg))->left=dvb_mixer.volume_left/2.56;
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((ao_control_vol_t*)(arg))->right=dvb_mixer.volume_right/2.56;
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return CONTROL_OK;
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}
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return CONTROL_ERROR;
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case AOCONTROL_SET_VOLUME:
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if(vo_mpegpes_fd2>=0){
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dvb_mixer.volume_left=((ao_control_vol_t*)(arg))->left*2.56;
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dvb_mixer.volume_right=((ao_control_vol_t*)(arg))->right*2.56;
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if(dvb_mixer.volume_left>255) dvb_mixer.volume_left=255;
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if(dvb_mixer.volume_right>255) dvb_mixer.volume_right=255;
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// printf("Setting DVB volume: %d ; %d \n",dvb_mixer.volume_left,dvb_mixer.volume_right);
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if ( (ioctl(vo_mpegpes_fd2,AUDIO_SET_MIXER, &dvb_mixer) < 0)){
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mp_msg(MSGT_AO, MSGL_ERR, MSGTR_AO_MPEGPES_CantSetMixer,
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strerror(errno));
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return CONTROL_ERROR;
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}
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return CONTROL_OK;
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}
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return CONTROL_ERROR;
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}
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#endif
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return CONTROL_UNKNOWN;
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}
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static int freq=0;
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static int freq_id=0;
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#ifdef HAVE_DVB
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static int init_device(int card)
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{
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char ao_file[30];
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#ifndef HAVE_DVB_HEAD
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mp_msg(MSGT_VO,MSGL_INFO, "Opening /dev/ost/audio\n");
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sprintf(ao_file, "/dev/ost/audio");
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#else
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mp_msg(MSGT_VO,MSGL_INFO, "Opening /dev/dvb/adapter%d/audio0\n", card);
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sprintf(ao_file, "/dev/dvb/adapter%d/audio0", card);
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#endif
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if((vo_mpegpes_fd2 = open(ao_file,O_RDWR|O_NONBLOCK)) < 0)
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{
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perror("DVB AUDIO DEVICE: ");
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return -1;
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}
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if( (ioctl(vo_mpegpes_fd2,AUDIO_SELECT_SOURCE, AUDIO_SOURCE_MEMORY) < 0))
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{
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perror("DVB AUDIO SELECT SOURCE: ");
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return -1;
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}
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if((ioctl(vo_mpegpes_fd2,AUDIO_PLAY) < 0))
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{
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perror("DVB AUDIO PLAY: ");
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return -1;
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}
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if((ioctl(vo_mpegpes_fd2,AUDIO_SET_AV_SYNC, true) < 0))
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{
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perror("DVB AUDIO SET AV SYNC: ");
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return -1;
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}
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//FIXME: in vo_mpegpes audio was inited as MUTEd
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if((ioctl(vo_mpegpes_fd2,AUDIO_SET_MUTE, false) < 0))
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{
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perror("DVB AUDIO SET MUTE: ");
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return -1;
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}
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return vo_mpegpes_fd2;
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}
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#endif
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static int preinit(const char *arg)
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{
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int card = 1;
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char *ao_file = NULL;
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opt_t subopts[] = {
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{"card", OPT_ARG_INT, &card, NULL},
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{"file", OPT_ARG_MSTRZ, &ao_file, NULL},
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{NULL}
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};
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if(subopt_parse(ao_subdevice, subopts) != 0)
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{
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mp_msg(MSGT_VO, MSGL_ERR, "AO_MPEGPES, Unrecognized options\n");
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return -1;
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}
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if((card < 1) || (card > 4))
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{
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mp_msg(MSGT_VO, MSGL_ERR, "DVB card number must be between 1 and 4\n");
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return -1;
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}
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card--;
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#ifdef HAVE_DVB
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if(!ao_file)
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return init_device(card);
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#else
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if(!ao_file)
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return vo_mpegpes_fd; //video fd
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#endif
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vo_mpegpes_fd2=open(ao_file,O_WRONLY|O_CREAT,0666);
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if(vo_mpegpes_fd2<0)
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{
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perror("ao_mpegpes");
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return -1;
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}
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return vo_mpegpes_fd2;
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}
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static int my_ao_write(unsigned char* data,int len){
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int orig_len = len;
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#ifdef HAVE_DVB
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#define NFD 1
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struct pollfd pfd[NFD];
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pfd[0].fd = vo_mpegpes_fd2;
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pfd[0].events = POLLOUT;
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while(len>0){
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if(poll(pfd,NFD,1)){
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if(pfd[0].revents & POLLOUT){
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int ret=write(vo_mpegpes_fd2,data,len);
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if(ret<=0){
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perror("write");
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usleep(0);
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} else {
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len-=ret;
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data+=ret;
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}
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} else usleep(1000);
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}
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}
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#else
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if(vo_mpegpes_fd2<0) return 0; // no file
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write(vo_mpegpes_fd2,data,len); // write to file
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#endif
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return orig_len;
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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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if(preinit(NULL)<0) return 0;
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ao_data.channels=2;
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ao_data.outburst=2000;
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switch(format){
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case AF_FORMAT_S16_LE:
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case AF_FORMAT_S16_BE:
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case AF_FORMAT_MPEG2:
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case AF_FORMAT_AC3:
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ao_data.format=format;
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break;
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default:
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ao_data.format=AF_FORMAT_S16_BE;
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}
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retry:
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switch(rate){
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case 48000: freq_id=0;break;
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case 96000: freq_id=1;break;
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case 44100: freq_id=2;break;
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case 32000: freq_id=3;break;
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default:
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mp_msg(MSGT_AO, MSGL_ERR, MSGTR_AO_MPEGPES_UnsupSamplerate, rate);
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#if 0
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if(rate>48000) rate=96000; else
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if(rate>44100) rate=48000; else
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if(rate>32000) rate=44100; else
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rate=32000;
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goto retry;
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#else
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rate=48000; freq_id=0;
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#endif
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}
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ao_data.bps=rate*2*2;
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freq=ao_data.samplerate=rate;
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return 1;
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}
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// close audio device
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static void uninit(int immed){
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}
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// stop playing and empty buffers (for seeking/pause)
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static void reset(void){
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}
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// stop playing, keep buffers (for pause)
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static void audio_pause(void)
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{
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// for now, just call reset();
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reset();
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}
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// resume playing, after audio_pause()
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static void audio_resume(void)
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{
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}
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void send_pes_packet(unsigned char* data,int len,int id,int timestamp);
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void send_lpcm_packet(unsigned char* data,int len,int id,int timestamp,int freq_id);
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extern int vo_pts;
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// return: how many bytes can be played without blocking
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static int get_space(void){
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float x=(float)(vo_pts-ao_data.pts)/90000.0;
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int y;
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//FIXME: is it correct?
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if(vo_mpegpes_fd < 0) return 32000; //not using -vo mpegpes
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// printf("vo_pts: %5.3f ao_pts: %5.3f\n",vo_pts/90000.0,ao_data.pts/90000.0);
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if(x<=0) return 0;
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y=freq*4*x;y/=ao_data.outburst;y*=ao_data.outburst;
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if(y>32000) y=32000;
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// printf("diff: %5.3f -> %d \n",x,y);
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return y;
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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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// printf("\nao_mpegpes: play(%d) freq=%d\n",len,freq_id);
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if(ao_data.format==AF_FORMAT_MPEG2)
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send_mpeg_pes_packet (data, len, 0x1C0, ao_data.pts, 1, my_ao_write);
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else {
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int i;
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unsigned short *s=data;
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// if(len>2000) len=2000;
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// printf("ao_mpegpes: len=%d \n",len);
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if(ao_data.format==AF_FORMAT_S16_LE || ao_data.format==AF_FORMAT_AC3)
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for(i=0;i<len/2;i++) s[i]=(s[i]>>8)|(s[i]<<8); // le<->be
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send_mpeg_lpcm_packet(data, len, 0xA0, ao_data.pts, freq_id, my_ao_write);
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}
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return len;
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}
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// return: delay in seconds between first and last sample in buffer
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static float get_delay(void){
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return 0.0;
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}
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