int frame_diff;
int est_delay;
+ if (!subs->last_delay)
+ return 0; /* short path */
+
current_frame_number = usb_get_current_frame_number(subs->dev);
/*
* HCD implementations use different widths, use lower 8 bits.
return SNDRV_PCM_POS_XRUN;
spin_lock(&subs->lock);
hwptr_done = subs->hwptr_done;
- substream->runtime->delay = snd_usb_pcm_delay(subs,
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+ substream->runtime->delay = snd_usb_pcm_delay(subs,
substream->runtime->rate);
spin_unlock(&subs->lock);
return hwptr_done / (substream->runtime->frame_bits >> 3);
{
struct usb_device *dev = chip->dev;
unsigned char data[1];
- unsigned int ep;
int err;
- ep = get_endpoint(alts, 0)->bEndpointAddress;
-
data[0] = 1;
if ((err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), UAC2_CS_CUR,
USB_TYPE_CLASS | USB_RECIP_ENDPOINT | USB_DIR_OUT,
}
}
-static int start_endpoints(struct snd_usb_substream *subs, int can_sleep)
+static int start_endpoints(struct snd_usb_substream *subs, bool can_sleep)
{
int err;
return 0;
}
-static void stop_endpoints(struct snd_usb_substream *subs,
- int force, int can_sleep, int wait)
+static void stop_endpoints(struct snd_usb_substream *subs, bool wait)
{
if (test_and_clear_bit(SUBSTREAM_FLAG_SYNC_EP_STARTED, &subs->flags))
- snd_usb_endpoint_stop(subs->sync_endpoint,
- force, can_sleep, wait);
+ snd_usb_endpoint_stop(subs->sync_endpoint);
if (test_and_clear_bit(SUBSTREAM_FLAG_DATA_EP_STARTED, &subs->flags))
- snd_usb_endpoint_stop(subs->data_endpoint,
- force, can_sleep, wait);
+ snd_usb_endpoint_stop(subs->data_endpoint);
+
+ if (wait) {
+ snd_usb_endpoint_sync_pending_stop(subs->sync_endpoint);
+ snd_usb_endpoint_sync_pending_stop(subs->data_endpoint);
+ }
}
static int deactivate_endpoints(struct snd_usb_substream *subs)
attr = fmt->ep_attr & USB_ENDPOINT_SYNCTYPE;
switch (subs->stream->chip->usb_id) {
+ case USB_ID(0x0763, 0x2030): /* M-Audio Fast Track C400 */
+ if (is_playback) {
+ implicit_fb = 1;
+ ep = 0x81;
+ iface = usb_ifnum_to_if(dev, 3);
+
+ if (!iface || iface->num_altsetting == 0)
+ return -EINVAL;
+
+ alts = &iface->altsetting[1];
+ goto add_sync_ep;
+ }
+ break;
case USB_ID(0x0763, 0x2080): /* M-Audio FastTrack Ultra */
case USB_ID(0x0763, 0x2081):
if (is_playback) {
/* ... and check descriptor size before accessing bSynchAddress
because there is a version of the SB Audigy 2 NX firmware lacking
the audio fields in the endpoint descriptors */
- if ((get_endpoint(alts, 1)->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) != 0x01 ||
+ if ((get_endpoint(alts, 1)->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) != USB_ENDPOINT_XFER_ISOC ||
(get_endpoint(alts, 1)->bLength >= USB_DT_ENDPOINT_AUDIO_SIZE &&
get_endpoint(alts, 1)->bSynchAddress != 0 &&
!implicit_fb)) {
return 0;
}
+/*
+ * Return the score of matching two audioformats.
+ * Veto the audioformat if:
+ * - It has no channels for some reason.
+ * - Requested PCM format is not supported.
+ * - Requested sample rate is not supported.
+ */
+static int match_endpoint_audioformats(struct audioformat *fp,
+ struct audioformat *match, int rate,
+ snd_pcm_format_t pcm_format)
+{
+ int i;
+ int score = 0;
+
+ if (fp->channels < 1) {
+ snd_printdd("%s: (fmt @%p) no channels\n", __func__, fp);
+ return 0;
+ }
+
+ if (!(fp->formats & (1ULL << pcm_format))) {
+ snd_printdd("%s: (fmt @%p) no match for format %d\n", __func__,
+ fp, pcm_format);
+ return 0;
+ }
+
+ for (i = 0; i < fp->nr_rates; i++) {
+ if (fp->rate_table[i] == rate) {
+ score++;
+ break;
+ }
+ }
+ if (!score) {
+ snd_printdd("%s: (fmt @%p) no match for rate %d\n", __func__,
+ fp, rate);
+ return 0;
+ }
+
+ if (fp->channels == match->channels)
+ score++;
+
+ snd_printdd("%s: (fmt @%p) score %d\n", __func__, fp, score);
+
+ return score;
+}
+
+/*
+ * Configure the sync ep using the rate and pcm format of the data ep.
+ */
+static int configure_sync_endpoint(struct snd_usb_substream *subs)
+{
+ int ret;
+ struct audioformat *fp;
+ struct audioformat *sync_fp = NULL;
+ int cur_score = 0;
+ int sync_period_bytes = subs->period_bytes;
+ struct snd_usb_substream *sync_subs =
+ &subs->stream->substream[subs->direction ^ 1];
+
+ /* Try to find the best matching audioformat. */
+ list_for_each_entry(fp, &sync_subs->fmt_list, list) {
+ int score = match_endpoint_audioformats(fp, subs->cur_audiofmt,
+ subs->cur_rate, subs->pcm_format);
+
+ if (score > cur_score) {
+ sync_fp = fp;
+ cur_score = score;
+ }
+ }
+
+ if (unlikely(sync_fp == NULL)) {
+ snd_printk(KERN_ERR "%s: no valid audioformat for sync ep %x found\n",
+ __func__, sync_subs->ep_num);
+ return -EINVAL;
+ }
+
+ /*
+ * Recalculate the period bytes if channel number differ between
+ * data and sync ep audioformat.
+ */
+ if (sync_fp->channels != subs->channels) {
+ sync_period_bytes = (subs->period_bytes / subs->channels) *
+ sync_fp->channels;
+ snd_printdd("%s: adjusted sync ep period bytes (%d -> %d)\n",
+ __func__, subs->period_bytes, sync_period_bytes);
+ }
+
+ ret = snd_usb_endpoint_set_params(subs->sync_endpoint,
+ subs->pcm_format,
+ sync_fp->channels,
+ sync_period_bytes,
+ subs->cur_rate,
+ sync_fp,
+ NULL);
+
+ return ret;
+}
+
/*
* configure endpoint params
*
int ret;
/* format changed */
- stop_endpoints(subs, 0, 0, 0);
+ stop_endpoints(subs, true);
ret = snd_usb_endpoint_set_params(subs->data_endpoint,
subs->pcm_format,
subs->channels,
return ret;
if (subs->sync_endpoint)
- ret = snd_usb_endpoint_set_params(subs->sync_endpoint,
- subs->pcm_format,
- subs->channels,
- subs->period_bytes,
- subs->cur_rate,
- subs->cur_audiofmt,
- NULL);
+ ret = configure_sync_endpoint(subs);
+
return ret;
}
subs->period_bytes = 0;
down_read(&subs->stream->chip->shutdown_rwsem);
if (!subs->stream->chip->shutdown) {
- stop_endpoints(subs, 0, 1, 1);
+ stop_endpoints(subs, true);
deactivate_endpoints(subs);
}
up_read(&subs->stream->chip->shutdown_rwsem);
/* for playback, submit the URBs now; otherwise, the first hwptr_done
* updates for all URBs would happen at the same time when starting */
if (subs->direction == SNDRV_PCM_STREAM_PLAYBACK)
- ret = start_endpoints(subs, 1);
+ ret = start_endpoints(subs, true);
unlock:
up_read(&subs->stream->chip->shutdown_rwsem);
struct snd_usb_stream *as = snd_pcm_substream_chip(substream);
struct snd_usb_substream *subs = &as->substream[direction];
- stop_endpoints(subs, 0, 0, 0);
+ stop_endpoints(subs, true);
if (!as->chip->shutdown && subs->interface >= 0) {
usb_set_interface(subs->dev, subs->interface, 0);
return;
spin_lock_irqsave(&subs->lock, flags);
+ if (!subs->last_delay)
+ goto out; /* short path */
+
est_delay = snd_usb_pcm_delay(subs, runtime->rate);
/* update delay with exact number of samples played */
if (processed > subs->last_delay)
snd_printk(KERN_DEBUG "delay: estimated %d, actual %d\n",
est_delay, subs->last_delay);
+ if (!subs->running) {
+ /* update last_frame_number for delay counting here since
+ * prepare_playback_urb won't be called during pause
+ */
+ subs->last_frame_number =
+ usb_get_current_frame_number(subs->dev) & 0xff;
+ }
+
+ out:
spin_unlock_irqrestore(&subs->lock, flags);
}
subs->running = 1;
return 0;
case SNDRV_PCM_TRIGGER_STOP:
- stop_endpoints(subs, 0, 0, 0);
+ stop_endpoints(subs, false);
subs->running = 0;
return 0;
case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
subs->data_endpoint->prepare_data_urb = NULL;
- subs->data_endpoint->retire_data_urb = NULL;
+ /* keep retire_data_urb for delay calculation */
+ subs->data_endpoint->retire_data_urb = retire_playback_urb;
subs->running = 0;
return 0;
}
switch (cmd) {
case SNDRV_PCM_TRIGGER_START:
- err = start_endpoints(subs, 0);
+ err = start_endpoints(subs, false);
if (err < 0)
return err;
subs->running = 1;
return 0;
case SNDRV_PCM_TRIGGER_STOP:
- stop_endpoints(subs, 0, 0, 0);
+ stop_endpoints(subs, false);
subs->running = 0;
return 0;
case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
projects / can-eth-gw-linux.git / blobdiff