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comparison src/linuxplay.c @ 129:e292c9648bb9 xemacs-20-1p3

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Import from CVS: tag xemacs-20-1p3
author cvs
date Mon, 13 Aug 2007 09:28:38 +0200
parents 9b50b4588a93
children 538048ae2ab8
comparison
equal deleted inserted replaced
128:13db4aa44a2e 129:e292c9648bb9
812 perror("SNDCTL_DSP_SYNC"); 812 perror("SNDCTL_DSP_SYNC");
813 return(0); } 813 return(0); }
814 814
815 /* Initialize sound hardware with prefered parameters */ 815 /* Initialize sound hardware with prefered parameters */
816 816
817 /* The PCSP driver does not support reading of the sampling rate via the
818 SOUND_PCM_READ_RATE ioctl; determine "the_speed" here */
819 the_speed = speed; ioctl(audio_fd,SNDCTL_DSP_SPEED,&the_speed);
820 /* The PCSP driver does not support reading of the mono/stereo flag, thus
821 we assume, that failure to change this mode means we are in mono mode */
822 if (((i = (the_stereo = tracks)-1),ioctl(audio_fd,SNDCTL_DSP_STEREO,&i)) < 0)
823 the_stereo = 1;
824 the_fmt = fmt; ioctl(audio_fd,SNDCTL_DSP_SETFMT,&the_fmt);
825
826 /* If the sound hardware cannot support 16 bit format or requires a 817 /* If the sound hardware cannot support 16 bit format or requires a
827 different byte sex then try to drop to 8 bit format */ 818 different byte sex then try to drop to 8 bit format */
828 the_fmt = AFMT_QUERY; ioctl(audio_fd,SNDCTL_DSP_SETFMT,&the_fmt); 819
820 the_fmt = fmt;
821 if(ioctl(audio_fd,SNDCTL_DSP_SETFMT,&the_fmt) < 0) {
822 perror("SNDCTL_DSP_SETFMT");
823 return(0);
824 }
825
829 if (fmt != the_fmt) { 826 if (fmt != the_fmt) {
830 if (fmt == AFMT_S16_LE || fmt == AFMT_S16_BE) { 827 if (fmt == AFMT_S16_LE || fmt == AFMT_S16_BE) {
831 *sndcnv = fmt == AFMT_S16_BE ? sndcnv2byteBE : sndcnv2byteLE; 828 *sndcnv = fmt == AFMT_S16_BE ? sndcnv2byteBE : sndcnv2byteLE;
832 if (((i=fmt=AFMT_U8),ioctl(audio_fd,SNDCTL_DSP_SETFMT,&i)) < 0 || 829 if (((i=fmt=AFMT_U8),ioctl(audio_fd,SNDCTL_DSP_SETFMT,&i)) < 0 ||
833 fmt != i || ioctl(audio_fd,SNDCTL_DSP_SETFMT,&the_fmt) < 0 || 830 fmt != i || ioctl(audio_fd,SNDCTL_DSP_SETFMT,&the_fmt) < 0 ||
842 if (((i=fmt=AFMT_U8),ioctl(audio_fd,SNDCTL_DSP_SETFMT,&i)) < 0 || 839 if (((i=fmt=AFMT_U8),ioctl(audio_fd,SNDCTL_DSP_SETFMT,&i)) < 0 ||
843 fmt != i || ioctl(audio_fd,SNDCTL_DSP_SETFMT,&the_fmt) < 0 || 840 fmt != i || ioctl(audio_fd,SNDCTL_DSP_SETFMT,&the_fmt) < 0 ||
844 fmt != the_fmt) { 841 fmt != the_fmt) {
845 perror("SNDCTRL_DSP_SETFMT"); 842 perror("SNDCTRL_DSP_SETFMT");
846 return(0); } } 843 return(0); } }
844
845 /* The PCSP driver does not support reading of the sampling rate via the
846 SOUND_PCM_READ_RATE ioctl; determine "the_speed" here */
847 the_speed = speed; ioctl(audio_fd,SNDCTL_DSP_SPEED,&the_speed);
848 /* The PCSP driver does not support reading of the mono/stereo flag, thus
849 we assume, that failure to change this mode means we are in mono mode */
850 if (((i = (the_stereo = tracks)-1),ioctl(audio_fd,SNDCTL_DSP_STEREO,&i)) < 0)
851 the_stereo = 1;
847 852
848 /* Try to request stereo playback (if needed); if this cannot be supported 853 /* Try to request stereo playback (if needed); if this cannot be supported
849 by the hardware, then install conversion routines for mono playback */ 854 by the hardware, then install conversion routines for mono playback */
850 855
851 /* This ioctl will fail if we use the PCSP driver; thus the value of 856 /* This ioctl will fail if we use the PCSP driver; thus the value of