diff options
Diffstat (limited to 'sound/drivers/dummy.c')
-rw-r--r-- | sound/drivers/dummy.c | 643 |
1 files changed, 643 insertions, 0 deletions
diff --git a/sound/drivers/dummy.c b/sound/drivers/dummy.c new file mode 100644 index 0000000..a61640c --- /dev/null +++ b/sound/drivers/dummy.c @@ -0,0 +1,643 @@ +/* + * Dummy soundcard + * Copyright (c) by Jaroslav Kysela <perex@suse.cz> + * + * 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 + * + */ + +#include <sound/driver.h> +#include <linux/init.h> +#include <linux/jiffies.h> +#include <linux/slab.h> +#include <linux/time.h> +#include <linux/wait.h> +#include <linux/moduleparam.h> +#include <sound/core.h> +#include <sound/control.h> +#include <sound/pcm.h> +#include <sound/rawmidi.h> +#include <sound/initval.h> + +MODULE_AUTHOR("Jaroslav Kysela <perex@suse.cz>"); +MODULE_DESCRIPTION("Dummy soundcard (/dev/null)"); +MODULE_LICENSE("GPL"); +MODULE_SUPPORTED_DEVICE("{{ALSA,Dummy soundcard}}"); + +#define MAX_PCM_DEVICES 4 +#define MAX_PCM_SUBSTREAMS 16 +#define MAX_MIDI_DEVICES 2 + +#if 0 /* emu10k1 emulation */ +#define MAX_BUFFER_SIZE (128 * 1024) +static int emu10k1_playback_constraints(snd_pcm_runtime_t *runtime) +{ + int err; + if ((err = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS)) < 0) + return err; + if ((err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 256, UINT_MAX)) < 0) + return err; + return 0; +} +#define add_playback_constraints emu10k1_playback_constraints +#endif + +#if 0 /* RME9652 emulation */ +#define MAX_BUFFER_SIZE (26 * 64 * 1024) +#define USE_FORMATS SNDRV_PCM_FMTBIT_S32_LE +#define USE_CHANNELS_MIN 26 +#define USE_CHANNELS_MAX 26 +#define USE_PERIODS_MIN 2 +#define USE_PERIODS_MAX 2 +#endif + +#if 0 /* ICE1712 emulation */ +#define MAX_BUFFER_SIZE (256 * 1024) +#define USE_FORMATS SNDRV_PCM_FMTBIT_S32_LE +#define USE_CHANNELS_MIN 10 +#define USE_CHANNELS_MAX 10 +#define USE_PERIODS_MIN 1 +#define USE_PERIODS_MAX 1024 +#endif + +#if 0 /* UDA1341 emulation */ +#define MAX_BUFFER_SIZE (16380) +#define USE_FORMATS SNDRV_PCM_FMTBIT_S16_LE +#define USE_CHANNELS_MIN 2 +#define USE_CHANNELS_MAX 2 +#define USE_PERIODS_MIN 2 +#define USE_PERIODS_MAX 255 +#endif + +#if 0 /* simple AC97 bridge (intel8x0) with 48kHz AC97 only codec */ +#define USE_FORMATS SNDRV_PCM_FMTBIT_S16_LE +#define USE_CHANNELS_MIN 2 +#define USE_CHANNELS_MAX 2 +#define USE_RATE SNDRV_PCM_RATE_48000 +#define USE_RATE_MIN 48000 +#define USE_RATE_MAX 48000 +#endif + + +/* defaults */ +#ifndef MAX_BUFFER_SIZE +#define MAX_BUFFER_SIZE (64*1024) +#endif +#ifndef USE_FORMATS +#define USE_FORMATS (SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S16_LE) +#endif +#ifndef USE_RATE +#define USE_RATE SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_8000_48000 +#define USE_RATE_MIN 5500 +#define USE_RATE_MAX 48000 +#endif +#ifndef USE_CHANNELS_MIN +#define USE_CHANNELS_MIN 1 +#endif +#ifndef USE_CHANNELS_MAX +#define USE_CHANNELS_MAX 2 +#endif +#ifndef USE_PERIODS_MIN +#define USE_PERIODS_MIN 1 +#endif +#ifndef USE_PERIODS_MAX +#define USE_PERIODS_MAX 1024 +#endif +#ifndef add_playback_constraints +#define add_playback_constraints(x) 0 +#endif +#ifndef add_capture_constraints +#define add_capture_constraints(x) 0 +#endif + +static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX; /* Index 0-MAX */ +static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR; /* ID for this card */ +static int enable[SNDRV_CARDS] = {1, [1 ... (SNDRV_CARDS - 1)] = 0}; +static int pcm_devs[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 1}; +static int pcm_substreams[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 8}; +//static int midi_devs[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 2}; + +module_param_array(index, int, NULL, 0444); +MODULE_PARM_DESC(index, "Index value for dummy soundcard."); +module_param_array(id, charp, NULL, 0444); +MODULE_PARM_DESC(id, "ID string for dummy soundcard."); +module_param_array(enable, bool, NULL, 0444); +MODULE_PARM_DESC(enable, "Enable this dummy soundcard."); +module_param_array(pcm_devs, int, NULL, 0444); +MODULE_PARM_DESC(pcm_devs, "PCM devices # (0-4) for dummy driver."); +module_param_array(pcm_substreams, int, NULL, 0444); +MODULE_PARM_DESC(pcm_substreams, "PCM substreams # (1-16) for dummy driver."); +//module_param_array(midi_devs, int, NULL, 0444); +//MODULE_PARM_DESC(midi_devs, "MIDI devices # (0-2) for dummy driver."); + +#define MIXER_ADDR_MASTER 0 +#define MIXER_ADDR_LINE 1 +#define MIXER_ADDR_MIC 2 +#define MIXER_ADDR_SYNTH 3 +#define MIXER_ADDR_CD 4 +#define MIXER_ADDR_LAST 4 + +typedef struct snd_card_dummy { + snd_card_t *card; + spinlock_t mixer_lock; + int mixer_volume[MIXER_ADDR_LAST+1][2]; + int capture_source[MIXER_ADDR_LAST+1][2]; +} snd_card_dummy_t; + +typedef struct snd_card_dummy_pcm { + snd_card_dummy_t *dummy; + spinlock_t lock; + struct timer_list timer; + unsigned int pcm_size; + unsigned int pcm_count; + unsigned int pcm_bps; /* bytes per second */ + unsigned int pcm_jiffie; /* bytes per one jiffie */ + unsigned int pcm_irq_pos; /* IRQ position */ + unsigned int pcm_buf_pos; /* position in buffer */ + snd_pcm_substream_t *substream; +} snd_card_dummy_pcm_t; + +static snd_card_t *snd_dummy_cards[SNDRV_CARDS] = SNDRV_DEFAULT_PTR; + + +static void snd_card_dummy_pcm_timer_start(snd_pcm_substream_t * substream) +{ + snd_pcm_runtime_t *runtime = substream->runtime; + snd_card_dummy_pcm_t *dpcm = runtime->private_data; + + dpcm->timer.expires = 1 + jiffies; + add_timer(&dpcm->timer); +} + +static void snd_card_dummy_pcm_timer_stop(snd_pcm_substream_t * substream) +{ + snd_pcm_runtime_t *runtime = substream->runtime; + snd_card_dummy_pcm_t *dpcm = runtime->private_data; + + del_timer(&dpcm->timer); +} + +static int snd_card_dummy_playback_trigger(snd_pcm_substream_t * substream, + int cmd) +{ + if (cmd == SNDRV_PCM_TRIGGER_START) { + snd_card_dummy_pcm_timer_start(substream); + } else if (cmd == SNDRV_PCM_TRIGGER_STOP) { + snd_card_dummy_pcm_timer_stop(substream); + } else { + return -EINVAL; + } + return 0; +} + +static int snd_card_dummy_capture_trigger(snd_pcm_substream_t * substream, + int cmd) +{ + if (cmd == SNDRV_PCM_TRIGGER_START) { + snd_card_dummy_pcm_timer_start(substream); + } else if (cmd == SNDRV_PCM_TRIGGER_STOP) { + snd_card_dummy_pcm_timer_stop(substream); + } else { + return -EINVAL; + } + return 0; +} + +static int snd_card_dummy_pcm_prepare(snd_pcm_substream_t * substream) +{ + snd_pcm_runtime_t *runtime = substream->runtime; + snd_card_dummy_pcm_t *dpcm = runtime->private_data; + unsigned int bps; + + bps = runtime->rate * runtime->channels; + bps *= snd_pcm_format_width(runtime->format); + bps /= 8; + if (bps <= 0) + return -EINVAL; + dpcm->pcm_bps = bps; + dpcm->pcm_jiffie = bps / HZ; + dpcm->pcm_size = snd_pcm_lib_buffer_bytes(substream); + dpcm->pcm_count = snd_pcm_lib_period_bytes(substream); + dpcm->pcm_irq_pos = 0; + dpcm->pcm_buf_pos = 0; + return 0; +} + +static int snd_card_dummy_playback_prepare(snd_pcm_substream_t * substream) +{ + return snd_card_dummy_pcm_prepare(substream); +} + +static int snd_card_dummy_capture_prepare(snd_pcm_substream_t * substream) +{ + return snd_card_dummy_pcm_prepare(substream); +} + +static void snd_card_dummy_pcm_timer_function(unsigned long data) +{ + snd_card_dummy_pcm_t *dpcm = (snd_card_dummy_pcm_t *)data; + + dpcm->timer.expires = 1 + jiffies; + add_timer(&dpcm->timer); + spin_lock_irq(&dpcm->lock); + dpcm->pcm_irq_pos += dpcm->pcm_jiffie; + dpcm->pcm_buf_pos += dpcm->pcm_jiffie; + dpcm->pcm_buf_pos %= dpcm->pcm_size; + if (dpcm->pcm_irq_pos >= dpcm->pcm_count) { + dpcm->pcm_irq_pos %= dpcm->pcm_count; + snd_pcm_period_elapsed(dpcm->substream); + } + spin_unlock_irq(&dpcm->lock); +} + +static snd_pcm_uframes_t snd_card_dummy_playback_pointer(snd_pcm_substream_t * substream) +{ + snd_pcm_runtime_t *runtime = substream->runtime; + snd_card_dummy_pcm_t *dpcm = runtime->private_data; + + return bytes_to_frames(runtime, dpcm->pcm_buf_pos); +} + +static snd_pcm_uframes_t snd_card_dummy_capture_pointer(snd_pcm_substream_t * substream) +{ + snd_pcm_runtime_t *runtime = substream->runtime; + snd_card_dummy_pcm_t *dpcm = runtime->private_data; + + return bytes_to_frames(runtime, dpcm->pcm_buf_pos); +} + +static snd_pcm_hardware_t snd_card_dummy_playback = +{ + .info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED | + SNDRV_PCM_INFO_MMAP_VALID), + .formats = USE_FORMATS, + .rates = USE_RATE, + .rate_min = USE_RATE_MIN, + .rate_max = USE_RATE_MAX, + .channels_min = USE_CHANNELS_MIN, + .channels_max = USE_CHANNELS_MAX, + .buffer_bytes_max = MAX_BUFFER_SIZE, + .period_bytes_min = 64, + .period_bytes_max = MAX_BUFFER_SIZE, + .periods_min = USE_PERIODS_MIN, + .periods_max = USE_PERIODS_MAX, + .fifo_size = 0, +}; + +static snd_pcm_hardware_t snd_card_dummy_capture = +{ + .info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED | + SNDRV_PCM_INFO_MMAP_VALID), + .formats = USE_FORMATS, + .rates = USE_RATE, + .rate_min = USE_RATE_MIN, + .rate_max = USE_RATE_MAX, + .channels_min = USE_CHANNELS_MIN, + .channels_max = USE_CHANNELS_MAX, + .buffer_bytes_max = MAX_BUFFER_SIZE, + .period_bytes_min = 64, + .period_bytes_max = MAX_BUFFER_SIZE, + .periods_min = USE_PERIODS_MIN, + .periods_max = USE_PERIODS_MAX, + .fifo_size = 0, +}; + +static void snd_card_dummy_runtime_free(snd_pcm_runtime_t *runtime) +{ + snd_card_dummy_pcm_t *dpcm = runtime->private_data; + kfree(dpcm); +} + +static int snd_card_dummy_hw_params(snd_pcm_substream_t * substream, + snd_pcm_hw_params_t * hw_params) +{ + return snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params)); +} + +static int snd_card_dummy_hw_free(snd_pcm_substream_t * substream) +{ + return snd_pcm_lib_free_pages(substream); +} + +static int snd_card_dummy_playback_open(snd_pcm_substream_t * substream) +{ + snd_pcm_runtime_t *runtime = substream->runtime; + snd_card_dummy_pcm_t *dpcm; + int err; + + dpcm = kcalloc(1, sizeof(*dpcm), GFP_KERNEL); + if (dpcm == NULL) + return -ENOMEM; + init_timer(&dpcm->timer); + dpcm->timer.data = (unsigned long) dpcm; + dpcm->timer.function = snd_card_dummy_pcm_timer_function; + spin_lock_init(&dpcm->lock); + dpcm->substream = substream; + runtime->private_data = dpcm; + runtime->private_free = snd_card_dummy_runtime_free; + runtime->hw = snd_card_dummy_playback; + if (substream->pcm->device & 1) { + runtime->hw.info &= ~SNDRV_PCM_INFO_INTERLEAVED; + runtime->hw.info |= SNDRV_PCM_INFO_NONINTERLEAVED; + } + if (substream->pcm->device & 2) + runtime->hw.info &= ~(SNDRV_PCM_INFO_MMAP|SNDRV_PCM_INFO_MMAP_VALID); + if ((err = add_playback_constraints(runtime)) < 0) { + kfree(dpcm); + return err; + } + + return 0; +} + +static int snd_card_dummy_capture_open(snd_pcm_substream_t * substream) +{ + snd_pcm_runtime_t *runtime = substream->runtime; + snd_card_dummy_pcm_t *dpcm; + int err; + + dpcm = kcalloc(1, sizeof(*dpcm), GFP_KERNEL); + if (dpcm == NULL) + return -ENOMEM; + init_timer(&dpcm->timer); + dpcm->timer.data = (unsigned long) dpcm; + dpcm->timer.function = snd_card_dummy_pcm_timer_function; + spin_lock_init(&dpcm->lock); + dpcm->substream = substream; + runtime->private_data = dpcm; + runtime->private_free = snd_card_dummy_runtime_free; + runtime->hw = snd_card_dummy_capture; + if (substream->pcm->device == 1) { + runtime->hw.info &= ~SNDRV_PCM_INFO_INTERLEAVED; + runtime->hw.info |= SNDRV_PCM_INFO_NONINTERLEAVED; + } + if (substream->pcm->device & 2) + runtime->hw.info &= ~(SNDRV_PCM_INFO_MMAP|SNDRV_PCM_INFO_MMAP_VALID); + if ((err = add_capture_constraints(runtime)) < 0) { + kfree(dpcm); + return err; + } + + return 0; +} + +static int snd_card_dummy_playback_close(snd_pcm_substream_t * substream) +{ + return 0; +} + +static int snd_card_dummy_capture_close(snd_pcm_substream_t * substream) +{ + return 0; +} + +static snd_pcm_ops_t snd_card_dummy_playback_ops = { + .open = snd_card_dummy_playback_open, + .close = snd_card_dummy_playback_close, + .ioctl = snd_pcm_lib_ioctl, + .hw_params = snd_card_dummy_hw_params, + .hw_free = snd_card_dummy_hw_free, + .prepare = snd_card_dummy_playback_prepare, + .trigger = snd_card_dummy_playback_trigger, + .pointer = snd_card_dummy_playback_pointer, +}; + +static snd_pcm_ops_t snd_card_dummy_capture_ops = { + .open = snd_card_dummy_capture_open, + .close = snd_card_dummy_capture_close, + .ioctl = snd_pcm_lib_ioctl, + .hw_params = snd_card_dummy_hw_params, + .hw_free = snd_card_dummy_hw_free, + .prepare = snd_card_dummy_capture_prepare, + .trigger = snd_card_dummy_capture_trigger, + .pointer = snd_card_dummy_capture_pointer, +}; + +static int __init snd_card_dummy_pcm(snd_card_dummy_t *dummy, int device, int substreams) +{ + snd_pcm_t *pcm; + int err; + + if ((err = snd_pcm_new(dummy->card, "Dummy PCM", device, substreams, substreams, &pcm)) < 0) + return err; + snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_card_dummy_playback_ops); + snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_card_dummy_capture_ops); + pcm->private_data = dummy; + pcm->info_flags = 0; + strcpy(pcm->name, "Dummy PCM"); + snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_CONTINUOUS, + snd_dma_continuous_data(GFP_KERNEL), + 0, 64*1024); + return 0; +} + +#define DUMMY_VOLUME(xname, xindex, addr) \ +{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \ + .info = snd_dummy_volume_info, \ + .get = snd_dummy_volume_get, .put = snd_dummy_volume_put, \ + .private_value = addr } + +static int snd_dummy_volume_info(snd_kcontrol_t * kcontrol, snd_ctl_elem_info_t * uinfo) +{ + uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; + uinfo->count = 2; + uinfo->value.integer.min = -50; + uinfo->value.integer.max = 100; + return 0; +} + +static int snd_dummy_volume_get(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol) +{ + snd_card_dummy_t *dummy = snd_kcontrol_chip(kcontrol); + unsigned long flags; + int addr = kcontrol->private_value; + + spin_lock_irqsave(&dummy->mixer_lock, flags); + ucontrol->value.integer.value[0] = dummy->mixer_volume[addr][0]; + ucontrol->value.integer.value[1] = dummy->mixer_volume[addr][1]; + spin_unlock_irqrestore(&dummy->mixer_lock, flags); + return 0; +} + +static int snd_dummy_volume_put(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol) +{ + snd_card_dummy_t *dummy = snd_kcontrol_chip(kcontrol); + unsigned long flags; + int change, addr = kcontrol->private_value; + int left, right; + + left = ucontrol->value.integer.value[0]; + if (left < -50) + left = -50; + if (left > 100) + left = 100; + right = ucontrol->value.integer.value[1]; + if (right < -50) + right = -50; + if (right > 100) + right = 100; + spin_lock_irqsave(&dummy->mixer_lock, flags); + change = dummy->mixer_volume[addr][0] != left || + dummy->mixer_volume[addr][1] != right; + dummy->mixer_volume[addr][0] = left; + dummy->mixer_volume[addr][1] = right; + spin_unlock_irqrestore(&dummy->mixer_lock, flags); + return change; +} + +#define DUMMY_CAPSRC(xname, xindex, addr) \ +{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \ + .info = snd_dummy_capsrc_info, \ + .get = snd_dummy_capsrc_get, .put = snd_dummy_capsrc_put, \ + .private_value = addr } + +static int snd_dummy_capsrc_info(snd_kcontrol_t * kcontrol, snd_ctl_elem_info_t * uinfo) +{ + uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN; + uinfo->count = 2; + uinfo->value.integer.min = 0; + uinfo->value.integer.max = 1; + return 0; +} + +static int snd_dummy_capsrc_get(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol) +{ + snd_card_dummy_t *dummy = snd_kcontrol_chip(kcontrol); + unsigned long flags; + int addr = kcontrol->private_value; + + spin_lock_irqsave(&dummy->mixer_lock, flags); + ucontrol->value.integer.value[0] = dummy->capture_source[addr][0]; + ucontrol->value.integer.value[1] = dummy->capture_source[addr][1]; + spin_unlock_irqrestore(&dummy->mixer_lock, flags); + return 0; +} + +static int snd_dummy_capsrc_put(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol) +{ + snd_card_dummy_t *dummy = snd_kcontrol_chip(kcontrol); + unsigned long flags; + int change, addr = kcontrol->private_value; + int left, right; + + left = ucontrol->value.integer.value[0] & 1; + right = ucontrol->value.integer.value[1] & 1; + spin_lock_irqsave(&dummy->mixer_lock, flags); + change = dummy->capture_source[addr][0] != left && + dummy->capture_source[addr][1] != right; + dummy->capture_source[addr][0] = left; + dummy->capture_source[addr][1] = right; + spin_unlock_irqrestore(&dummy->mixer_lock, flags); + return change; +} + +static snd_kcontrol_new_t snd_dummy_controls[] = { +DUMMY_VOLUME("Master Volume", 0, MIXER_ADDR_MASTER), +DUMMY_CAPSRC("Master Capture Switch", 0, MIXER_ADDR_MASTER), +DUMMY_VOLUME("Synth Volume", 0, MIXER_ADDR_SYNTH), +DUMMY_CAPSRC("Synth Capture Switch", 0, MIXER_ADDR_MASTER), +DUMMY_VOLUME("Line Volume", 0, MIXER_ADDR_LINE), +DUMMY_CAPSRC("Line Capture Switch", 0, MIXER_ADDR_MASTER), +DUMMY_VOLUME("Mic Volume", 0, MIXER_ADDR_MIC), +DUMMY_CAPSRC("Mic Capture Switch", 0, MIXER_ADDR_MASTER), +DUMMY_VOLUME("CD Volume", 0, MIXER_ADDR_CD), +DUMMY_CAPSRC("CD Capture Switch", 0, MIXER_ADDR_MASTER) +}; + +static int __init snd_card_dummy_new_mixer(snd_card_dummy_t * dummy) +{ + snd_card_t *card = dummy->card; + unsigned int idx; + int err; + + snd_assert(dummy != NULL, return -EINVAL); + spin_lock_init(&dummy->mixer_lock); + strcpy(card->mixername, "Dummy Mixer"); + + for (idx = 0; idx < ARRAY_SIZE(snd_dummy_controls); idx++) { + if ((err = snd_ctl_add(card, snd_ctl_new1(&snd_dummy_controls[idx], dummy))) < 0) + return err; + } + return 0; +} + +static int __init snd_card_dummy_probe(int dev) +{ + snd_card_t *card; + struct snd_card_dummy *dummy; + int idx, err; + + if (!enable[dev]) + return -ENODEV; + card = snd_card_new(index[dev], id[dev], THIS_MODULE, + sizeof(struct snd_card_dummy)); + if (card == NULL) + return -ENOMEM; + dummy = (struct snd_card_dummy *)card->private_data; + dummy->card = card; + for (idx = 0; idx < MAX_PCM_DEVICES && idx < pcm_devs[dev]; idx++) { + if (pcm_substreams[dev] < 1) + pcm_substreams[dev] = 1; + if (pcm_substreams[dev] > MAX_PCM_SUBSTREAMS) + pcm_substreams[dev] = MAX_PCM_SUBSTREAMS; + if ((err = snd_card_dummy_pcm(dummy, idx, pcm_substreams[dev])) < 0) + goto __nodev; + } + if ((err = snd_card_dummy_new_mixer(dummy)) < 0) + goto __nodev; + strcpy(card->driver, "Dummy"); + strcpy(card->shortname, "Dummy"); + sprintf(card->longname, "Dummy %i", dev + 1); + if ((err = snd_card_register(card)) == 0) { + snd_dummy_cards[dev] = card; + return 0; + } + __nodev: + snd_card_free(card); + return err; +} + +static int __init alsa_card_dummy_init(void) +{ + int dev, cards; + + for (dev = cards = 0; dev < SNDRV_CARDS && enable[dev]; dev++) { + if (snd_card_dummy_probe(dev) < 0) { +#ifdef MODULE + printk(KERN_ERR "Dummy soundcard #%i not found or device busy\n", dev + 1); +#endif + break; + } + cards++; + } + if (!cards) { +#ifdef MODULE + printk(KERN_ERR "Dummy soundcard not found or device busy\n"); +#endif + return -ENODEV; + } + return 0; +} + +static void __exit alsa_card_dummy_exit(void) +{ + int idx; + + for (idx = 0; idx < SNDRV_CARDS; idx++) + snd_card_free(snd_dummy_cards[idx]); +} + +module_init(alsa_card_dummy_init) +module_exit(alsa_card_dummy_exit) |