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https://gitee.com/openharmony/kernel_linux
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[ALSA] snd-dummy - Code clean-up
Modules: Generic drivers Clean up snd-dummy driver code. - Make common PCM callbacks - Simplify open callback - Remove unnecessary irqsave in control callbacks Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Iwai
Jaroslav Kysela
parent
47eaebfd31
commit
c8eb6ba16a
@ -172,47 +172,33 @@ typedef struct snd_card_dummy_pcm {
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static snd_card_t *snd_dummy_cards[SNDRV_CARDS] = SNDRV_DEFAULT_PTR;
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static void snd_card_dummy_pcm_timer_start(snd_pcm_substream_t * substream)
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static inline void snd_card_dummy_pcm_timer_start(snd_card_dummy_pcm_t *dpcm)
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{
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snd_pcm_runtime_t *runtime = substream->runtime;
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snd_card_dummy_pcm_t *dpcm = runtime->private_data;
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dpcm->timer.expires = 1 + jiffies;
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add_timer(&dpcm->timer);
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}
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static void snd_card_dummy_pcm_timer_stop(snd_pcm_substream_t * substream)
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static inline void snd_card_dummy_pcm_timer_stop(snd_card_dummy_pcm_t *dpcm)
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{
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snd_pcm_runtime_t *runtime = substream->runtime;
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snd_card_dummy_pcm_t *dpcm = runtime->private_data;
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del_timer(&dpcm->timer);
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}
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static int snd_card_dummy_playback_trigger(snd_pcm_substream_t * substream,
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int cmd)
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static int snd_card_dummy_pcm_trigger(snd_pcm_substream_t *substream, int cmd)
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{
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if (cmd == SNDRV_PCM_TRIGGER_START) {
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snd_card_dummy_pcm_timer_start(substream);
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} else if (cmd == SNDRV_PCM_TRIGGER_STOP) {
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snd_card_dummy_pcm_timer_stop(substream);
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} else {
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return -EINVAL;
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}
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return 0;
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}
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snd_pcm_runtime_t *runtime = substream->runtime;
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snd_dummy_card_pcm_t *dpcm = runtime->private_data;
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int err = 0;
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static int snd_card_dummy_capture_trigger(snd_pcm_substream_t * substream,
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int cmd)
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{
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spin_lock(&dpcm->lock);
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if (cmd == SNDRV_PCM_TRIGGER_START) {
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snd_card_dummy_pcm_timer_start(substream);
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snd_card_dummy_pcm_timer_start(dpcm);
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} else if (cmd == SNDRV_PCM_TRIGGER_STOP) {
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snd_card_dummy_pcm_timer_stop(substream);
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snd_card_dummy_pcm_timer_stop(dpcm);
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} else {
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return -EINVAL;
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err = -EINVAL;
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}
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return 0;
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spin_unlock(&dpcm->lock);
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return err;
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}
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static int snd_card_dummy_pcm_prepare(snd_pcm_substream_t * substream)
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@ -235,42 +221,26 @@ static int snd_card_dummy_pcm_prepare(snd_pcm_substream_t * substream)
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return 0;
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}
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static int snd_card_dummy_playback_prepare(snd_pcm_substream_t * substream)
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{
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return snd_card_dummy_pcm_prepare(substream);
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}
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static int snd_card_dummy_capture_prepare(snd_pcm_substream_t * substream)
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{
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return snd_card_dummy_pcm_prepare(substream);
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}
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static void snd_card_dummy_pcm_timer_function(unsigned long data)
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{
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snd_card_dummy_pcm_t *dpcm = (snd_card_dummy_pcm_t *)data;
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spin_lock(&dpcm->lock);
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dpcm->timer.expires = 1 + jiffies;
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add_timer(&dpcm->timer);
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spin_lock_irq(&dpcm->lock);
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dpcm->pcm_irq_pos += dpcm->pcm_jiffie;
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dpcm->pcm_buf_pos += dpcm->pcm_jiffie;
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dpcm->pcm_buf_pos %= dpcm->pcm_size;
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if (dpcm->pcm_irq_pos >= dpcm->pcm_count) {
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dpcm->pcm_irq_pos %= dpcm->pcm_count;
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spin_unlock(&dpcm->lock);
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snd_pcm_period_elapsed(dpcm->substream);
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spin_lock(&dpcm->lock);
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}
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spin_unlock_irq(&dpcm->lock);
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spin_unlock(&dpcm->lock);
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}
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static snd_pcm_uframes_t snd_card_dummy_playback_pointer(snd_pcm_substream_t * substream)
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{
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snd_pcm_runtime_t *runtime = substream->runtime;
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snd_card_dummy_pcm_t *dpcm = runtime->private_data;
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return bytes_to_frames(runtime, dpcm->pcm_buf_pos);
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}
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static snd_pcm_uframes_t snd_card_dummy_capture_pointer(snd_pcm_substream_t * substream)
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static snd_pcm_uframes_t snd_card_dummy_pcm_pointer(snd_pcm_substream_t * substream)
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{
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snd_pcm_runtime_t *runtime = substream->runtime;
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snd_card_dummy_pcm_t *dpcm = runtime->private_data;
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@ -316,8 +286,7 @@ static snd_pcm_hardware_t snd_card_dummy_capture =
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static void snd_card_dummy_runtime_free(snd_pcm_runtime_t *runtime)
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{
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snd_card_dummy_pcm_t *dpcm = runtime->private_data;
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kfree(dpcm);
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kfree(runtime->private_data);
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}
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static int snd_card_dummy_hw_params(snd_pcm_substream_t * substream,
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@ -331,20 +300,29 @@ static int snd_card_dummy_hw_free(snd_pcm_substream_t * substream)
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return snd_pcm_lib_free_pages(substream);
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}
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static snd_card_dummy_pcm_t *new_pcm_stream(snd_pcm_substream_t *substream)
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{
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snd_card_dummy_pcm_t *dpcm;
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dpcm = kzalloc(sizeof(*dpcm), GFP_KERNEL);
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if (! dpcm)
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return dpcm;
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init_timer(&dpcm->timer);
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dpcm->timer.data = (unsigned long) dpcm;
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dpcm->timer.function = snd_card_dummy_pcm_timer_function;
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spin_lock_init(&dpcm->lock);
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dpcm->substream = substream;
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return dpcm;
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}
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static int snd_card_dummy_playback_open(snd_pcm_substream_t * substream)
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{
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snd_pcm_runtime_t *runtime = substream->runtime;
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snd_card_dummy_pcm_t *dpcm;
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int err;
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dpcm = kzalloc(sizeof(*dpcm), GFP_KERNEL);
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if (dpcm == NULL)
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if ((dpcm = new_pcm_stream(substream)) == NULL)
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return -ENOMEM;
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init_timer(&dpcm->timer);
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dpcm->timer.data = (unsigned long) dpcm;
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dpcm->timer.function = snd_card_dummy_pcm_timer_function;
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spin_lock_init(&dpcm->lock);
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dpcm->substream = substream;
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runtime->private_data = dpcm;
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runtime->private_free = snd_card_dummy_runtime_free;
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runtime->hw = snd_card_dummy_playback;
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@ -368,14 +346,8 @@ static int snd_card_dummy_capture_open(snd_pcm_substream_t * substream)
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snd_card_dummy_pcm_t *dpcm;
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int err;
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dpcm = kzalloc(sizeof(*dpcm), GFP_KERNEL);
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if (dpcm == NULL)
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if ((dpcm = new_pcm_stream(substream)) == NULL)
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return -ENOMEM;
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init_timer(&dpcm->timer);
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dpcm->timer.data = (unsigned long) dpcm;
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dpcm->timer.function = snd_card_dummy_pcm_timer_function;
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spin_lock_init(&dpcm->lock);
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dpcm->substream = substream;
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runtime->private_data = dpcm;
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runtime->private_free = snd_card_dummy_runtime_free;
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runtime->hw = snd_card_dummy_capture;
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@ -409,9 +381,9 @@ static snd_pcm_ops_t snd_card_dummy_playback_ops = {
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.ioctl = snd_pcm_lib_ioctl,
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.hw_params = snd_card_dummy_hw_params,
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.hw_free = snd_card_dummy_hw_free,
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.prepare = snd_card_dummy_playback_prepare,
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.trigger = snd_card_dummy_playback_trigger,
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.pointer = snd_card_dummy_playback_pointer,
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.prepare = snd_card_dummy_pcm_prepare,
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.trigger = snd_card_dummy_pcm_trigger,
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.pointer = snd_card_dummy_pcm_pointer,
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};
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static snd_pcm_ops_t snd_card_dummy_capture_ops = {
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@ -420,9 +392,9 @@ static snd_pcm_ops_t snd_card_dummy_capture_ops = {
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.ioctl = snd_pcm_lib_ioctl,
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.hw_params = snd_card_dummy_hw_params,
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.hw_free = snd_card_dummy_hw_free,
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.prepare = snd_card_dummy_capture_prepare,
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.trigger = snd_card_dummy_capture_trigger,
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.pointer = snd_card_dummy_capture_pointer,
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.prepare = snd_card_dummy_pcm_prepare,
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.trigger = snd_card_dummy_pcm_trigger,
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.pointer = snd_card_dummy_pcm_pointer,
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};
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static int __init snd_card_dummy_pcm(snd_card_dummy_t *dummy, int device, int substreams)
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@ -461,20 +433,18 @@ static int snd_dummy_volume_info(snd_kcontrol_t * kcontrol, snd_ctl_elem_info_t
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static int snd_dummy_volume_get(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol)
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{
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snd_card_dummy_t *dummy = snd_kcontrol_chip(kcontrol);
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unsigned long flags;
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int addr = kcontrol->private_value;
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spin_lock_irqsave(&dummy->mixer_lock, flags);
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spin_lock_irq(&dummy->mixer_lock);
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ucontrol->value.integer.value[0] = dummy->mixer_volume[addr][0];
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ucontrol->value.integer.value[1] = dummy->mixer_volume[addr][1];
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spin_unlock_irqrestore(&dummy->mixer_lock, flags);
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spin_unlock_irq(&dummy->mixer_lock);
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return 0;
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}
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static int snd_dummy_volume_put(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol)
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{
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snd_card_dummy_t *dummy = snd_kcontrol_chip(kcontrol);
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unsigned long flags;
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int change, addr = kcontrol->private_value;
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int left, right;
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@ -488,12 +458,12 @@ static int snd_dummy_volume_put(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t
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right = -50;
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if (right > 100)
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right = 100;
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spin_lock_irqsave(&dummy->mixer_lock, flags);
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spin_lock_irq(&dummy->mixer_lock);
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change = dummy->mixer_volume[addr][0] != left ||
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dummy->mixer_volume[addr][1] != right;
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dummy->mixer_volume[addr][0] = left;
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dummy->mixer_volume[addr][1] = right;
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spin_unlock_irqrestore(&dummy->mixer_lock, flags);
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spin_unlock_irq(&dummy->mixer_lock);
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return change;
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}
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@ -515,31 +485,29 @@ static int snd_dummy_capsrc_info(snd_kcontrol_t * kcontrol, snd_ctl_elem_info_t
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static int snd_dummy_capsrc_get(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol)
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{
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snd_card_dummy_t *dummy = snd_kcontrol_chip(kcontrol);
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unsigned long flags;
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int addr = kcontrol->private_value;
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spin_lock_irqsave(&dummy->mixer_lock, flags);
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spin_lock_irq(&dummy->mixer_lock);
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ucontrol->value.integer.value[0] = dummy->capture_source[addr][0];
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ucontrol->value.integer.value[1] = dummy->capture_source[addr][1];
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spin_unlock_irqrestore(&dummy->mixer_lock, flags);
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spin_unlock_irq(&dummy->mixer_lock);
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return 0;
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}
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static int snd_dummy_capsrc_put(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol)
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{
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snd_card_dummy_t *dummy = snd_kcontrol_chip(kcontrol);
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unsigned long flags;
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int change, addr = kcontrol->private_value;
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int left, right;
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left = ucontrol->value.integer.value[0] & 1;
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right = ucontrol->value.integer.value[1] & 1;
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spin_lock_irqsave(&dummy->mixer_lock, flags);
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spin_lock_irq(&dummy->mixer_lock);
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change = dummy->capture_source[addr][0] != left &&
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dummy->capture_source[addr][1] != right;
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dummy->capture_source[addr][0] = left;
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dummy->capture_source[addr][1] = right;
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spin_unlock_irqrestore(&dummy->mixer_lock, flags);
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spin_unlock_irq(&dummy->mixer_lock);
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return change;
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}
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