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[/] [or1k_old/] [trunk/] [mp3/] [sw/] [mad-xess/] [audio_oss.c] - Rev 1765
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/* * mad - MPEG audio decoder * Copyright (C) 2000-2001 Robert Leslie * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA * * $Id: audio_oss.c,v 1.3 2001-11-06 17:01:07 simons Exp $ */ # ifdef HAVE_CONFIG_H # include "config.h" # endif #ifndef EMBED # include <unistd.h> # include <fcntl.h> # include <sys/ioctl.h> # include <sys/soundcard.h> # include <errno.h> # include "mad.h" # include "audio.h" # if !defined(AFMT_S32_NE) # if defined(WORDS_BIGENDIAN) # define AFMT_S32_NE AFMT_S32_BE # else # define AFMT_S32_NE AFMT_S32_LE # endif # endif # if !defined(AFMT_S16_NE) # if defined(WORDS_BIGENDIAN) # define AFMT_S16_NE AFMT_S16_BE # else # define AFMT_S16_NE AFMT_S16_LE # endif # endif # if !defined(SNDCTL_DSP_CHANNELS) && defined(SOUND_PCM_WRITE_CHANNELS) # define SNDCTL_DSP_CHANNELS SOUND_PCM_WRITE_CHANNELS # endif # define AUDIO_DEVICE "/dev/dsp" static int sfd; static unsigned int (*audio_pcm)(unsigned char *, unsigned int, mad_fixed_t const *, mad_fixed_t const *); inline static int init(struct audio_init *init) { if (init->path == 0) init->path = AUDIO_DEVICE; sfd = open(init->path, O_WRONLY); if (sfd == -1) { audio_error = ":"; return -1; } return 0; } inline static int config(struct audio_config *config) { int format; if (ioctl(sfd, SNDCTL_DSP_SYNC, 0) == -1) { audio_error = ":ioctl(SNDCTL_DSP_SYNC)"; return -1; } format = AFMT_S16_NE; if (ioctl(sfd, SNDCTL_DSP_SETFMT, &format) == -1) { audio_error = ":ioctl(SNDCTL_DSP_SETFMT)"; return -1; } audio_pcm = audio_pcm_s16le; if (ioctl(sfd, SNDCTL_DSP_CHANNELS, &config->channels) == -1) { audio_error = ":ioctl(SNDCTL_DSP_CHANNELS)"; return -1; } if (ioctl(sfd, SNDCTL_DSP_SPEED, &config->speed) == -1) { audio_error = ":ioctl(SNDCTL_DSP_SPEED)"; return -1; } return 0; } inline int output_s(unsigned char const *ptr, unsigned int len) { while (len) { int wrote; wrote = write(sfd, ptr, len); if (wrote == -1) { if (errno == EINTR) { printf("."); continue; } else { audio_error = ":write"; return -1; } } ptr += wrote; len -= wrote; } return 0; } inline static int finish(struct audio_finish *finish) { int result = 0; if (close(sfd) == -1 && result == 0) { audio_error = ":close"; result = -1; } return result; } inline int audio_oss(union audio_control *control) { audio_error = 0; switch (control->command) { case AUDIO_COMMAND_INIT: return init(&control->init); case AUDIO_COMMAND_CONFIG: return config(&control->config); case AUDIO_COMMAND_FINISH: return finish(&control->finish); } return 0; } #endif
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