| dummy.c (c1f3ee120bb61045b1c0a3ead620d1d65af47130) | dummy.c (53463a8302d0c3148c4c64c034312215e76429c2) |
|---|---|
| 1/* 2 * Dummy soundcard 3 * Copyright (c) by Jaroslav Kysela <perex@perex.cz> 4 * 5 * This program is free software; you can redistribute it and/or modify 6 * it under the terms of the GNU General Public License as published by 7 * the Free Software Foundation; either version 2 of the License, or 8 * (at your option) any later version. --- 167 unchanged lines hidden (view full) --- 176 int mixer_volume[MIXER_ADDR_LAST+1][2]; 177 int capture_source[MIXER_ADDR_LAST+1][2]; 178}; 179 180struct snd_dummy_pcm { 181 struct snd_dummy *dummy; 182 spinlock_t lock; 183 struct timer_list timer; | 1/* 2 * Dummy soundcard 3 * Copyright (c) by Jaroslav Kysela <perex@perex.cz> 4 * 5 * This program is free software; you can redistribute it and/or modify 6 * it under the terms of the GNU General Public License as published by 7 * the Free Software Foundation; either version 2 of the License, or 8 * (at your option) any later version. --- 167 unchanged lines hidden (view full) --- 176 int mixer_volume[MIXER_ADDR_LAST+1][2]; 177 int capture_source[MIXER_ADDR_LAST+1][2]; 178}; 179 180struct snd_dummy_pcm { 181 struct snd_dummy *dummy; 182 spinlock_t lock; 183 struct timer_list timer; |
| 184 unsigned int pcm_size; 185 unsigned int pcm_count; | 184 unsigned int pcm_buffer_size; 185 unsigned int pcm_period_size; |
| 186 unsigned int pcm_bps; /* bytes per second */ | 186 unsigned int pcm_bps; /* bytes per second */ |
| 187 unsigned int pcm_jiffie; /* bytes per one jiffie */ | 187 unsigned int pcm_hz; /* HZ */ |
| 188 unsigned int pcm_irq_pos; /* IRQ position */ 189 unsigned int pcm_buf_pos; /* position in buffer */ 190 struct snd_pcm_substream *substream; 191}; 192 193 194static inline void snd_card_dummy_pcm_timer_start(struct snd_dummy_pcm *dpcm) 195{ --- 37 unchanged lines hidden (view full) --- 233 unsigned int bps; 234 235 bps = runtime->rate * runtime->channels; 236 bps *= snd_pcm_format_width(runtime->format); 237 bps /= 8; 238 if (bps <= 0) 239 return -EINVAL; 240 dpcm->pcm_bps = bps; | 188 unsigned int pcm_irq_pos; /* IRQ position */ 189 unsigned int pcm_buf_pos; /* position in buffer */ 190 struct snd_pcm_substream *substream; 191}; 192 193 194static inline void snd_card_dummy_pcm_timer_start(struct snd_dummy_pcm *dpcm) 195{ --- 37 unchanged lines hidden (view full) --- 233 unsigned int bps; 234 235 bps = runtime->rate * runtime->channels; 236 bps *= snd_pcm_format_width(runtime->format); 237 bps /= 8; 238 if (bps <= 0) 239 return -EINVAL; 240 dpcm->pcm_bps = bps; |
| 241 dpcm->pcm_jiffie = bps / HZ; 242 dpcm->pcm_size = snd_pcm_lib_buffer_bytes(substream); 243 dpcm->pcm_count = snd_pcm_lib_period_bytes(substream); | 241 dpcm->pcm_hz = HZ; 242 dpcm->pcm_buffer_size = snd_pcm_lib_buffer_bytes(substream); 243 dpcm->pcm_period_size = snd_pcm_lib_period_bytes(substream); |
| 244 dpcm->pcm_irq_pos = 0; 245 dpcm->pcm_buf_pos = 0; | 244 dpcm->pcm_irq_pos = 0; 245 dpcm->pcm_buf_pos = 0; |
| 246 247 snd_pcm_format_set_silence(runtime->format, runtime->dma_area, 248 bytes_to_samples(runtime, runtime->dma_bytes)); 249 |
|
| 246 return 0; 247} 248 249static void snd_card_dummy_pcm_timer_function(unsigned long data) 250{ 251 struct snd_dummy_pcm *dpcm = (struct snd_dummy_pcm *)data; 252 unsigned long flags; 253 254 spin_lock_irqsave(&dpcm->lock, flags); 255 dpcm->timer.expires = 1 + jiffies; 256 add_timer(&dpcm->timer); | 250 return 0; 251} 252 253static void snd_card_dummy_pcm_timer_function(unsigned long data) 254{ 255 struct snd_dummy_pcm *dpcm = (struct snd_dummy_pcm *)data; 256 unsigned long flags; 257 258 spin_lock_irqsave(&dpcm->lock, flags); 259 dpcm->timer.expires = 1 + jiffies; 260 add_timer(&dpcm->timer); |
| 257 dpcm->pcm_irq_pos += dpcm->pcm_jiffie; 258 dpcm->pcm_buf_pos += dpcm->pcm_jiffie; 259 dpcm->pcm_buf_pos %= dpcm->pcm_size; 260 if (dpcm->pcm_irq_pos >= dpcm->pcm_count) { 261 dpcm->pcm_irq_pos %= dpcm->pcm_count; | 261 dpcm->pcm_irq_pos += dpcm->pcm_bps; 262 if (dpcm->pcm_irq_pos >= dpcm->pcm_period_size * dpcm->pcm_hz) { 263 dpcm->pcm_irq_pos %= dpcm->pcm_period_size * dpcm->pcm_hz; 264 dpcm->pcm_buf_pos += dpcm->pcm_period_size; 265 dpcm->pcm_buf_pos %= dpcm->pcm_buffer_size; |
| 262 spin_unlock_irqrestore(&dpcm->lock, flags); 263 snd_pcm_period_elapsed(dpcm->substream); 264 } else 265 spin_unlock_irqrestore(&dpcm->lock, flags); 266} 267 268static snd_pcm_uframes_t snd_card_dummy_pcm_pointer(struct snd_pcm_substream *substream) 269{ --- 432 unchanged lines hidden --- | 266 spin_unlock_irqrestore(&dpcm->lock, flags); 267 snd_pcm_period_elapsed(dpcm->substream); 268 } else 269 spin_unlock_irqrestore(&dpcm->lock, flags); 270} 271 272static snd_pcm_uframes_t snd_card_dummy_pcm_pointer(struct snd_pcm_substream *substream) 273{ --- 432 unchanged lines hidden --- |