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153 lines
3.4 KiB
153 lines
3.4 KiB
/* Extended Module Player |
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* Copyright (C) 1996-2012 Claudio Matsuoka and Hipolito Carraro Jr |
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* |
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* This file is part of the Extended Module Player and is distributed |
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* under the terms of the GNU General Public License. See doc/COPYING |
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* for more information. |
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*/ |
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/* |
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* Based on the AIX XMMS output plugin by Peter Alm, Thomas Nilsson |
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* and Olle Hallnas. |
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*/ |
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#ifdef HAVE_CONFIG_H |
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#include "config.h" |
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#endif |
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#include <sys/types.h> |
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#include <sys/param.h> |
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#include <sys/audio.h> |
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#include <sys/ioctl.h> |
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#include <sys/stat.h> |
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#include <fcntl.h> |
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#include <stdlib.h> |
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#include <string.h> |
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#include <unistd.h> |
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#include "common.h" |
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#include "driver.h" |
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#include "mixer.h" |
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static int audio_fd; |
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static audio_control control; |
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static audio_change change; |
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static int init(struct context_data *); |
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static int setaudio(struct xmp_options *); |
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static void bufdump(struct context_data *, void *, int); |
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static void shutdown(struct context_data *); |
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static void dummy() |
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{ |
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} |
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static char *help[] = { |
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"gain=val", "Audio output gain (0 to 255)", |
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/* "buffer=val", "Audio buffer size (default is 32768)", */ |
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NULL |
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}; |
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struct xmp_drv_info drv_bsd = { |
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"aix", /* driver ID */ |
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"AIX PCM audio", /* driver description */ |
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help, /* help */ |
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init, /* init */ |
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shutdown, /* shutdown */ |
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dummy, /* starttimer */ |
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dummy, /* stoptimer */ |
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bufdump, /* bufdump */ |
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NULL |
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}; |
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#define AUDIO_MIN_GAIN 0 |
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#define AUDIO_MAX_GAIN 100 |
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static int setaudio(struct xmp_options *o) |
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{ |
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audio_init ainit; |
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int gain = 128; |
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int bsize = 32 * 1024; |
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char *token, **parm; |
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parm_init(); |
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chkparm1("gain", gain = strtoul(token, NULL, 0)); |
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/* chkparm1 ("buffer", bsize = strtoul(token, NULL, 0)); */ |
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parm_end(); |
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if (gain < AUDIO_MIN_GAIN) |
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gain = AUDIO_MIN_GAIN; |
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if (gain > AUDIO_MAX_GAIN) |
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gain = AUDIO_MAX_GAIN; |
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init.mode = PCM; /* audio format */ |
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init.srate = o->freq; /* sample rate */ |
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init.operation = PLAY; /* PLAY or RECORD */ |
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init.channels = o->outfmt & XMP_FORMAT_MONO ? 1 : 2; |
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init.bits_per_sample = o->resol; /* bits per sample */ |
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init.flags = BIG_ENDIAN | TWOS_COMPLEMENT; |
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if (ioctl(audio_fd, AUDIO_INIT, &init) < 0) { |
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close(audio_fd); |
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return XMP_ERR_DINIT; |
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} |
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/* full blast; range: 0-0x7fffffff */ |
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change.volume = 0x7fffffff * (1.0 * gain / 200.0); |
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change.monitor = AUDIO_IGNORE; /* monitor what's recorded ? */ |
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change.input = AUDIO_IGNORE; /* input to record from */ |
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change.output = OUTPUT_1; /* line-out */ |
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change.balance = 0x3FFFFFFF; |
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control.ioctl_request = AUDIO_CHANGE; |
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control.request_info = (char *)&change; |
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if (ioctl(audio_fd, AUDIO_CONTROL, &control) < 0) { |
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close(audio_fd); |
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return XMP_ERR_DINIT; |
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} |
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/* start playback - won't actually start until write() calls occur */ |
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control.ioctl_request = AUDIO_START; |
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control.position = 0; |
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if (ioctl(audio_fd, AUDIO_CONTROL, &control) < 0) { |
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close(audio_fd); |
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return XMP_ERR_DINIT; |
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} |
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return 0; |
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} |
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static int init(struct context_data *ctx) |
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{ |
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if ((audio_fd = open("/dev/paud0/1", O_WRONLY)) == -1) |
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return XMP_ERR_DINIT; |
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if (setaudio(&ctx->o) != 0) |
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return XMP_ERR_DINIT; |
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return 0; |
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} |
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/* Build and write one tick (one PAL frame or 1/50 s in standard vblank |
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* timed mods) of audio data to the output device. |
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*/ |
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static void bufdump(struct context_data *ctx, void *b, int i) |
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{ |
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int j; |
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while (i) { |
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if ((j = write(audio_fd, b, i)) > 0) { |
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i -= j; |
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(char *)b += j; |
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} else |
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break; |
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}; |
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} |
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static void shutdown(struct context_data *ctx) |
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{ |
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control.ioctl_request = AUDIO_STOP; |
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ioctl(audio_fd, AUDIO_CONTROL, &control); |
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close(audio_fd); |
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}
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