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[ALSA] PCM core - introduce CONFIG_SND_PCM_XRUN_DEBUG 

This patch makes the XRUN (overrun/underrun) notification code optional.

Signed-off-by: Jaroslav Kysela <perex@suse.cz>
This commit is contained in:
Jaroslav Kysela 2006-04-24 21:57:16 +02:00
parent a2bbbc0c3c
commit 61fb63c096
3 changed files with 16 additions and 6 deletions
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10
sound/core/Kconfig
View File

@ -171,3 +171,13 @@ config SND_DEBUG_DETECT
help
Say Y here to enable extra-verbose log messages printed when
detecting devices.
config SND_PCM_XRUN_DEBUG
bool "Enable PCM ring buffer overrun/underrun debugging"
default n
depends on SND_DEBUG
help
Say Y to enable the PCM ring buffer overrun/underrun debugging.
It is usually not required, but if you have trouble with
sound clicking when system is loaded, it may help to determine
the process or driver which causes the scheduling gaps.

6
sound/core/pcm.c
View File

@ -436,7 +436,7 @@ static void snd_pcm_substream_proc_status_read(struct snd_info_entry *entry,
snd_iprintf(buffer, "appl_ptr : %ld\n", runtime->control->appl_ptr);
}
#ifdef CONFIG_SND_DEBUG
#ifdef CONFIG_SND_PCM_XRUN_DEBUG
static void snd_pcm_xrun_debug_read(struct snd_info_entry *entry,
struct snd_info_buffer *buffer)
{
@ -480,7 +480,7 @@ static int snd_pcm_stream_proc_init(struct snd_pcm_str *pstr)
}
pstr->proc_info_entry = entry;
#ifdef CONFIG_SND_DEBUG
#ifdef CONFIG_SND_PCM_XRUN_DEBUG
if ((entry = snd_info_create_card_entry(pcm->card, "xrun_debug",
pstr->proc_root)) != NULL) {
entry->c.text.read_size = 64;
@ -501,7 +501,7 @@ static int snd_pcm_stream_proc_init(struct snd_pcm_str *pstr)
static int snd_pcm_stream_proc_done(struct snd_pcm_str *pstr)
{
#ifdef CONFIG_SND_DEBUG
#ifdef CONFIG_SND_PCM_XRUN_DEBUG
if (pstr->proc_xrun_debug_entry) {
snd_info_unregister(pstr->proc_xrun_debug_entry);
pstr->proc_xrun_debug_entry = NULL;

6
sound/core/pcm_lib.c
View File

@ -130,7 +130,7 @@ void snd_pcm_playback_silence(struct snd_pcm_substream *substream, snd_pcm_ufram
static void xrun(struct snd_pcm_substream *substream)
{
snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN);
#ifdef CONFIG_SND_DEBUG
#ifdef CONFIG_SND_PCM_XRUN_DEBUG
if (substream->pstr->xrun_debug) {
snd_printd(KERN_DEBUG "XRUN: pcmC%dD%d%c\n",
substream->pcm->card->number,
@ -204,7 +204,7 @@ static inline int snd_pcm_update_hw_ptr_interrupt(struct snd_pcm_substream *subs
delta = hw_ptr_interrupt - new_hw_ptr;
if (delta > 0) {
if ((snd_pcm_uframes_t)delta < runtime->buffer_size / 2) {
#ifdef CONFIG_SND_DEBUG
#ifdef CONFIG_SND_PCM_XRUN_DEBUG
if (runtime->periods > 1 && substream->pstr->xrun_debug) {
snd_printd(KERN_ERR "Unexpected hw_pointer value [1] (stream = %i, delta: -%ld, max jitter = %ld): wrong interrupt acknowledge?\n", substream->stream, (long) delta, runtime->buffer_size / 2);
if (substream->pstr->xrun_debug > 1)
@ -249,7 +249,7 @@ int snd_pcm_update_hw_ptr(struct snd_pcm_substream *substream)
delta = old_hw_ptr - new_hw_ptr;
if (delta > 0) {
if ((snd_pcm_uframes_t)delta < runtime->buffer_size / 2) {
#ifdef CONFIG_SND_DEBUG
#ifdef CONFIG_SND_PCM_XRUN_DEBUG
if (runtime->periods > 2 && substream->pstr->xrun_debug) {
snd_printd(KERN_ERR "Unexpected hw_pointer value [2] (stream = %i, delta: -%ld, max jitter = %ld): wrong interrupt acknowledge?\n", substream->stream, (long) delta, runtime->buffer_size / 2);
if (substream->pstr->xrun_debug > 1)