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Diffstat (limited to 'sound/usb/usbaudio.c')
-rw-r--r--sound/usb/usbaudio.c79
1 files changed, 33 insertions, 46 deletions
diff --git a/sound/usb/usbaudio.c b/sound/usb/usbaudio.c
index 8f3cdb3..c2db0f9 100644
--- a/sound/usb/usbaudio.c
+++ b/sound/usb/usbaudio.c
@@ -107,7 +107,7 @@ MODULE_PARM_DESC(ignore_ctl_error,
#define MAX_PACKS_HS (MAX_PACKS * 8) /* in high speed mode */
#define MAX_URBS 8
#define SYNC_URBS 4 /* always four urbs for sync */
-#define MIN_PACKS_URB 1 /* minimum 1 packet per urb */
+#define MAX_QUEUE 24 /* try not to exceed this queue length, in ms */
struct audioformat {
struct list_head list;
@@ -525,7 +525,7 @@ static int snd_usb_audio_next_packet_size(struct snd_usb_substream *subs)
/*
* Prepare urb for streaming before playback starts or when paused.
*
- * We don't have any data, so we send a frame of silence.
+ * We don't have any data, so we send silence.
*/
static int prepare_nodata_playback_urb(struct snd_usb_substream *subs,
struct snd_pcm_runtime *runtime,
@@ -537,13 +537,13 @@ static int prepare_nodata_playback_urb(struct snd_usb_substream *subs,
offs = 0;
urb->dev = ctx->subs->dev;
- urb->number_of_packets = subs->packs_per_ms;
- for (i = 0; i < subs->packs_per_ms; ++i) {
+ for (i = 0; i < ctx->packets; ++i) {
counts = snd_usb_audio_next_packet_size(subs);
urb->iso_frame_desc[i].offset = offs * stride;
urb->iso_frame_desc[i].length = counts * stride;
offs += counts;
}
+ urb->number_of_packets = ctx->packets;
urb->transfer_buffer_length = offs * stride;
memset(urb->transfer_buffer,
subs->cur_audiofmt->format == SNDRV_PCM_FORMAT_U8 ? 0x80 : 0,
@@ -1034,9 +1034,9 @@ static void release_substream_urbs(struct snd_usb_substream *subs, int force)
static int init_substream_urbs(struct snd_usb_substream *subs, unsigned int period_bytes,
unsigned int rate, unsigned int frame_bits)
{
- unsigned int maxsize, n, i;
+ unsigned int maxsize, i;
int is_playback = subs->direction == SNDRV_PCM_STREAM_PLAYBACK;
- unsigned int npacks[MAX_URBS], urb_packs, total_packs, packs_per_ms;
+ unsigned int urb_packs, total_packs, packs_per_ms;
/* calculate the frequency in 16.16 format */
if (snd_usb_get_speed(subs->dev) == USB_SPEED_FULL)
@@ -1070,8 +1070,7 @@ static int init_substream_urbs(struct snd_usb_substream *subs, unsigned int peri
subs->packs_per_ms = packs_per_ms;
if (is_playback) {
- urb_packs = nrpacks;
- urb_packs = max(urb_packs, (unsigned int)MIN_PACKS_URB);
+ urb_packs = max(nrpacks, 1);
urb_packs = min(urb_packs, (unsigned int)MAX_PACKS);
} else
urb_packs = 1;
@@ -1079,7 +1078,7 @@ static int init_substream_urbs(struct snd_usb_substream *subs, unsigned int peri
/* decide how many packets to be used */
if (is_playback) {
- unsigned int minsize;
+ unsigned int minsize, maxpacks;
/* determine how small a packet can be */
minsize = (subs->freqn >> (16 - subs->datainterval))
* (frame_bits >> 3);
@@ -1092,8 +1091,13 @@ static int init_substream_urbs(struct snd_usb_substream *subs, unsigned int peri
total_packs = (total_packs + packs_per_ms - 1)
& ~(packs_per_ms - 1);
/* we need at least two URBs for queueing */
- if (total_packs < 2 * MIN_PACKS_URB * packs_per_ms)
- total_packs = 2 * MIN_PACKS_URB * packs_per_ms;
+ if (total_packs < 2 * packs_per_ms) {
+ total_packs = 2 * packs_per_ms;
+ } else {
+ /* and we don't want too long a queue either */
+ maxpacks = max(MAX_QUEUE * packs_per_ms, urb_packs * 2);
+ total_packs = min(total_packs, maxpacks);
+ }
} else {
total_packs = MAX_URBS * urb_packs;
}
@@ -1102,31 +1106,11 @@ static int init_substream_urbs(struct snd_usb_substream *subs, unsigned int peri
/* too much... */
subs->nurbs = MAX_URBS;
total_packs = MAX_URBS * urb_packs;
- }
- n = total_packs;
- for (i = 0; i < subs->nurbs; i++) {
- npacks[i] = n > urb_packs ? urb_packs : n;
- n -= urb_packs;
- }
- if (subs->nurbs <= 1) {
+ } else if (subs->nurbs < 2) {
/* too little - we need at least two packets
* to ensure contiguous playback/capture
*/
subs->nurbs = 2;
- npacks[0] = (total_packs + 1) / 2;
- npacks[1] = total_packs - npacks[0];
- } else if (npacks[subs->nurbs-1] < MIN_PACKS_URB * packs_per_ms) {
- /* the last packet is too small.. */
- if (subs->nurbs > 2) {
- /* merge to the first one */
- npacks[0] += npacks[subs->nurbs - 1];
- subs->nurbs--;
- } else {
- /* divide to two */
- subs->nurbs = 2;
- npacks[0] = (total_packs + 1) / 2;
- npacks[1] = total_packs - npacks[0];
- }
}
/* allocate and initialize data urbs */
@@ -1134,7 +1118,8 @@ static int init_substream_urbs(struct snd_usb_substream *subs, unsigned int peri
struct snd_urb_ctx *u = &subs->dataurb[i];
u->index = i;
u->subs = subs;
- u->packets = npacks[i];
+ u->packets = (i + 1) * total_packs / subs->nurbs
+ - i * total_packs / subs->nurbs;
u->buffer_size = maxsize * u->packets;
if (subs->fmt_type == USB_FORMAT_TYPE_II)
u->packets++; /* for transfer delimiter */
@@ -1292,14 +1277,14 @@ static int init_usb_sample_rate(struct usb_device *dev, int iface,
if ((err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), SET_CUR,
USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_OUT,
SAMPLING_FREQ_CONTROL << 8, ep, data, 3, 1000)) < 0) {
- snd_printk(KERN_ERR "%d:%d:%d: cannot set freq %d to ep 0x%x\n",
+ snd_printk(KERN_ERR "%d:%d:%d: cannot set freq %d to ep %#x\n",
dev->devnum, iface, fmt->altsetting, rate, ep);
return err;
}
if ((err = snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), GET_CUR,
USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_IN,
SAMPLING_FREQ_CONTROL << 8, ep, data, 3, 1000)) < 0) {
- snd_printk(KERN_WARNING "%d:%d:%d: cannot get freq at ep 0x%x\n",
+ snd_printk(KERN_WARNING "%d:%d:%d: cannot get freq at ep %#x\n",
dev->devnum, iface, fmt->altsetting, ep);
return 0; /* some devices don't support reading */
}
@@ -1431,9 +1416,11 @@ static int set_format(struct snd_usb_substream *subs, struct audioformat *fmt)
subs->cur_audiofmt = fmt;
#if 0
- printk("setting done: format = %d, rate = %d..%d, channels = %d\n",
+ printk(KERN_DEBUG
+ "setting done: format = %d, rate = %d..%d, channels = %d\n",
fmt->format, fmt->rate_min, fmt->rate_max, fmt->channels);
- printk(" datapipe = 0x%0x, syncpipe = 0x%0x\n",
+ printk(KERN_DEBUG
+ " datapipe = 0x%0x, syncpipe = 0x%0x\n",
subs->datapipe, subs->syncpipe);
#endif
@@ -1468,7 +1455,7 @@ static int snd_usb_hw_params(struct snd_pcm_substream *substream,
channels = params_channels(hw_params);
fmt = find_format(subs, format, rate, channels);
if (!fmt) {
- snd_printd(KERN_DEBUG "cannot set format: format = 0x%x, rate = %d, channels = %d\n",
+ snd_printd(KERN_DEBUG "cannot set format: format = %#x, rate = %d, channels = %d\n",
format, rate, channels);
return -EINVAL;
}
@@ -1795,7 +1782,7 @@ static int check_hw_params_convention(struct snd_usb_substream *subs)
if (rates[f->format] && rates[f->format] != f->rates)
goto __out;
}
- channels[f->format] |= (1 << f->channels);
+ channels[f->format] |= 1 << (f->channels - 1);
rates[f->format] |= f->rates;
/* needs knot? */
if (f->rates & SNDRV_PCM_RATE_KNOT)
@@ -1822,7 +1809,7 @@ static int check_hw_params_convention(struct snd_usb_substream *subs)
continue;
for (i = 0; i < 32; i++) {
if (f->rates & (1 << i))
- channels[i] |= (1 << f->channels);
+ channels[i] |= 1 << (f->channels - 1);
}
}
cmaster = 0;
@@ -1919,7 +1906,7 @@ static int setup_hw_info(struct snd_pcm_runtime *runtime, struct snd_usb_substre
* in the current code assume the 1ms period.
*/
snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_TIME,
- 1000 * MIN_PACKS_URB,
+ 1000,
/*(nrpacks * MAX_URBS) * 1000*/ UINT_MAX);
err = check_hw_params_convention(subs);
@@ -2160,7 +2147,7 @@ static void proc_dump_substream_formats(struct snd_usb_substream *subs, struct s
fp = list_entry(p, struct audioformat, list);
snd_iprintf(buffer, " Interface %d\n", fp->iface);
snd_iprintf(buffer, " Altset %d\n", fp->altsetting);
- snd_iprintf(buffer, " Format: 0x%x\n", fp->format);
+ snd_iprintf(buffer, " Format: %#x\n", fp->format);
snd_iprintf(buffer, " Channels: %d\n", fp->channels);
snd_iprintf(buffer, " Endpoint: %d %s (%s)\n",
fp->endpoint & USB_ENDPOINT_NUMBER_MASK,
@@ -2180,7 +2167,7 @@ static void proc_dump_substream_formats(struct snd_usb_substream *subs, struct s
snd_iprintf(buffer, "\n");
}
// snd_iprintf(buffer, " Max Packet Size = %d\n", fp->maxpacksize);
- // snd_iprintf(buffer, " EP Attribute = 0x%x\n", fp->attributes);
+ // snd_iprintf(buffer, " EP Attribute = %#x\n", fp->attributes);
}
}
@@ -2621,7 +2608,7 @@ static int parse_audio_format_ii(struct snd_usb_audio *chip, struct audioformat
fp->format = SNDRV_PCM_FORMAT_MPEG;
break;
default:
- snd_printd(KERN_INFO "%d:%u:%d : unknown format tag 0x%x is detected. processed as MPEG.\n",
+ snd_printd(KERN_INFO "%d:%u:%d : unknown format tag %#x is detected. processed as MPEG.\n",
chip->dev->devnum, fp->iface, fp->altsetting, format);
fp->format = SNDRV_PCM_FORMAT_MPEG;
break;
@@ -2819,7 +2806,7 @@ static int parse_audio_endpoints(struct snd_usb_audio *chip, int iface_no)
continue;
}
- snd_printdd(KERN_INFO "%d:%u:%d: add audio endpoint 0x%x\n", dev->devnum, iface_no, altno, fp->endpoint);
+ snd_printdd(KERN_INFO "%d:%u:%d: add audio endpoint %#x\n", dev->devnum, iface_no, altno, fp->endpoint);
err = add_audio_endpoint(chip, stream, fp);
if (err < 0) {
kfree(fp->rate_table);
@@ -3766,7 +3753,7 @@ static int usb_audio_resume(struct usb_interface *intf)
static int __init snd_usb_audio_init(void)
{
- if (nrpacks < MIN_PACKS_URB || nrpacks > MAX_PACKS) {
+ if (nrpacks < 1 || nrpacks > MAX_PACKS) {
printk(KERN_WARNING "invalid nrpacks value.\n");
return -EINVAL;
}
generated by cgit v0.10.2 at 2024-11-10 17:16:44 (GMT)