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$NetBSD: patch-media_libcubeb_src_cubeb__alsa.c,v 1.26 2018/01/24 16:52:08 ryoon Exp $
* Support alsa audio under NetBSD
* Avoid https://github.com/kinetiknz/cubeb/issues/226
--- media/libcubeb/src/cubeb_alsa.c.orig 2017-11-02 16:16:36.000000000 +0000
+++ media/libcubeb/src/cubeb_alsa.c
@@ -8,10 +8,12 @@
#define _DEFAULT_SOURCE
#define _BSD_SOURCE
#define _XOPEN_SOURCE 500
+#define _NETBSD_SOURCE
#include <pthread.h>
#include <sys/time.h>
#include <assert.h>
#include <limits.h>
+#include <dlfcn.h>
#include <poll.h>
#include <unistd.h>
#include <alsa/asoundlib.h>
@@ -25,6 +27,52 @@
#define ALSA_PA_PLUGIN "ALSA <-> PulseAudio PCM I/O Plugin"
+#ifdef DISABLE_LIBASOUND_DLOPEN
+#define WRAP(x) x
+#else
+#define WRAP(x) cubeb_##x
+#define MAKE_TYPEDEF(x) static typeof(x) * cubeb_##x
+MAKE_TYPEDEF(snd_config);
+MAKE_TYPEDEF(snd_config_add);
+MAKE_TYPEDEF(snd_config_copy);
+MAKE_TYPEDEF(snd_config_delete);
+MAKE_TYPEDEF(snd_config_get_id);
+MAKE_TYPEDEF(snd_config_get_string);
+MAKE_TYPEDEF(snd_config_imake_integer);
+MAKE_TYPEDEF(snd_config_search);
+MAKE_TYPEDEF(snd_config_search_definition);
+MAKE_TYPEDEF(snd_lib_error_set_handler);
+MAKE_TYPEDEF(snd_pcm_avail_update);
+MAKE_TYPEDEF(snd_pcm_close);
+MAKE_TYPEDEF(snd_pcm_delay);
+MAKE_TYPEDEF(snd_pcm_drain);
+MAKE_TYPEDEF(snd_pcm_frames_to_bytes);
+MAKE_TYPEDEF(snd_pcm_get_params);
+/* snd_pcm_hw_params_alloca is actually a macro */
+/* MAKE_TYPEDEF(snd_pcm_hw_params_alloca); */
+MAKE_TYPEDEF(snd_pcm_hw_params_sizeof);
+#define snd_pcm_hw_params_sizeof cubeb_snd_pcm_hw_params_sizeof
+MAKE_TYPEDEF(snd_pcm_hw_params_any);
+MAKE_TYPEDEF(snd_pcm_hw_params_get_channels_max);
+MAKE_TYPEDEF(snd_pcm_hw_params_get_rate);
+MAKE_TYPEDEF(snd_pcm_hw_params_set_rate_near);
+MAKE_TYPEDEF(snd_pcm_nonblock);
+MAKE_TYPEDEF(snd_pcm_open);
+MAKE_TYPEDEF(snd_pcm_open_lconf);
+MAKE_TYPEDEF(snd_pcm_pause);
+MAKE_TYPEDEF(snd_pcm_poll_descriptors);
+MAKE_TYPEDEF(snd_pcm_poll_descriptors_count);
+MAKE_TYPEDEF(snd_pcm_poll_descriptors_revents);
+MAKE_TYPEDEF(snd_pcm_readi);
+MAKE_TYPEDEF(snd_pcm_recover);
+MAKE_TYPEDEF(snd_pcm_set_params);
+MAKE_TYPEDEF(snd_pcm_start);
+MAKE_TYPEDEF(snd_pcm_state);
+MAKE_TYPEDEF(snd_pcm_writei);
+
+#undef MAKE_TYPEDEF
+#endif
+
/* ALSA is not thread-safe. snd_pcm_t instances are individually protected
by the owning cubeb_stream's mutex. snd_pcm_t creation and destruction
is not thread-safe until ALSA 1.0.24 (see alsa-lib.git commit 91c9c8f1),
@@ -65,6 +113,8 @@ struct cubeb {
workaround is not required. */
snd_config_t * local_config;
int is_pa;
+
+ void * libasound;
};
enum stream_state {
@@ -243,8 +293,8 @@ set_timeout(struct timeval * timeout, un
static void
stream_buffer_decrement(cubeb_stream * stm, long count)
{
- char * bufremains = stm->buffer + snd_pcm_frames_to_bytes(stm->pcm, count);
- memmove(stm->buffer, bufremains, snd_pcm_frames_to_bytes(stm->pcm, stm->bufframes - count));
+ char * bufremains = stm->buffer + WRAP(snd_pcm_frames_to_bytes)(stm->pcm, count);
+ memmove(stm->buffer, bufremains, WRAP(snd_pcm_frames_to_bytes)(stm->pcm, stm->bufframes - count));
stm->bufframes -= count;
}
@@ -276,9 +326,9 @@ alsa_process_stream(cubeb_stream * stm)
/* Call _poll_descriptors_revents() even if we don't use it
to let underlying plugins clear null events. Otherwise poll()
may wake up again and again, producing unnecessary CPU usage. */
- snd_pcm_poll_descriptors_revents(stm->pcm, stm->fds, stm->nfds, &revents);
+ WRAP(snd_pcm_poll_descriptors_revents)(stm->pcm, stm->fds, stm->nfds, &revents);
- avail = snd_pcm_avail_update(stm->pcm);
+ avail = WRAP(snd_pcm_avail_update)(stm->pcm);
/* Got null event? Bail and wait for another wakeup. */
if (avail == 0) {
@@ -301,7 +351,7 @@ alsa_process_stream(cubeb_stream * stm)
// TODO: should it be marked as DRAINING?
}
- got = snd_pcm_readi(stm->pcm, stm->buffer+stm->bufframes, avail);
+ got = WRAP(snd_pcm_readi)(stm->pcm, stm->buffer+stm->bufframes, avail);
if (got < 0) {
avail = got; // the error handler below will recover us
@@ -345,7 +395,7 @@ alsa_process_stream(cubeb_stream * stm)
(!stm->other_stream || stm->other_stream->bufframes > 0)) {
long got = avail - stm->bufframes;
void * other_buffer = stm->other_stream ? stm->other_stream->buffer : NULL;
- char * buftail = stm->buffer + snd_pcm_frames_to_bytes(stm->pcm, stm->bufframes);
+ char * buftail = stm->buffer + WRAP(snd_pcm_frames_to_bytes)(stm->pcm, stm->bufframes);
/* Correct read size to the other stream available frames */
if (stm->other_stream && got > (snd_pcm_sframes_t) stm->other_stream->bufframes) {
@@ -372,8 +422,8 @@ alsa_process_stream(cubeb_stream * stm)
long drain_frames = avail - stm->bufframes;
double drain_time = (double) drain_frames / stm->params.rate;
- char * buftail = stm->buffer + snd_pcm_frames_to_bytes(stm->pcm, stm->bufframes);
- memset(buftail, 0, snd_pcm_frames_to_bytes(stm->pcm, drain_frames));
+ char * buftail = stm->buffer + WRAP(snd_pcm_frames_to_bytes)(stm->pcm, stm->bufframes);
+ memset(buftail, 0, WRAP(snd_pcm_frames_to_bytes)(stm->pcm, drain_frames));
stm->bufframes = avail;
/* Mark as draining, unless we're waiting for capture */
@@ -400,7 +450,7 @@ alsa_process_stream(cubeb_stream * stm)
}
}
- wrote = snd_pcm_writei(stm->pcm, stm->buffer, avail);
+ wrote = WRAP(snd_pcm_writei)(stm->pcm, stm->buffer, avail);
if (wrote < 0) {
avail = wrote; // the error handler below will recover us
} else {
@@ -413,13 +463,13 @@ alsa_process_stream(cubeb_stream * stm)
/* Got some error? Let's try to recover the stream. */
if (avail < 0) {
- avail = snd_pcm_recover(stm->pcm, avail, 0);
+ avail = WRAP(snd_pcm_recover)(stm->pcm, avail, 0);
/* Capture pcm must be started after initial setup/recover */
if (avail >= 0 &&
stm->stream_type == SND_PCM_STREAM_CAPTURE &&
- snd_pcm_state(stm->pcm) == SND_PCM_STATE_PREPARED) {
- avail = snd_pcm_start(stm->pcm);
+ WRAP(snd_pcm_state)(stm->pcm) == SND_PCM_STATE_PREPARED) {
+ avail = WRAP(snd_pcm_start)(stm->pcm);
}
}
@@ -535,26 +585,26 @@ get_slave_pcm_node(snd_config_t * lconf,
slave_def = NULL;
- r = snd_config_search(root_pcm, "slave", &slave_pcm);
+ r = WRAP(snd_config_search)(root_pcm, "slave", &slave_pcm);
if (r < 0) {
return NULL;
}
- r = snd_config_get_string(slave_pcm, &string);
+ r = WRAP(snd_config_get_string)(slave_pcm, &string);
if (r >= 0) {
- r = snd_config_search_definition(lconf, "pcm_slave", string, &slave_def);
+ r = WRAP(snd_config_search_definition)(lconf, "pcm_slave", string, &slave_def);
if (r < 0) {
return NULL;
}
}
do {
- r = snd_config_search(slave_def ? slave_def : slave_pcm, "pcm", &pcm);
+ r = WRAP(snd_config_search)(slave_def ? slave_def : slave_pcm, "pcm", &pcm);
if (r < 0) {
break;
}
- r = snd_config_get_string(slave_def ? slave_def : slave_pcm, &string);
+ r = WRAP(snd_config_get_string)(slave_def ? slave_def : slave_pcm, &string);
if (r < 0) {
break;
}
@@ -563,7 +613,7 @@ get_slave_pcm_node(snd_config_t * lconf,
if (r < 0 || r > (int) sizeof(node_name)) {
break;
}
- r = snd_config_search(lconf, node_name, &pcm);
+ r = WRAP(snd_config_search)(lconf, node_name, &pcm);
if (r < 0) {
break;
}
@@ -572,7 +622,7 @@ get_slave_pcm_node(snd_config_t * lconf,
} while (0);
if (slave_def) {
- snd_config_delete(slave_def);
+ WRAP(snd_config_delete)(slave_def);
}
return NULL;
@@ -595,22 +645,22 @@ init_local_config_with_workaround(char c
lconf = NULL;
- if (snd_config == NULL) {
+ if (*WRAP(snd_config) == NULL) {
return NULL;
}
- r = snd_config_copy(&lconf, snd_config);
+ r = WRAP(snd_config_copy)(&lconf, *WRAP(snd_config));
if (r < 0) {
return NULL;
}
do {
- r = snd_config_search_definition(lconf, "pcm", pcm_name, &pcm_node);
+ r = WRAP(snd_config_search_definition)(lconf, "pcm", pcm_name, &pcm_node);
if (r < 0) {
break;
}
- r = snd_config_get_id(pcm_node, &string);
+ r = WRAP(snd_config_get_id)(pcm_node, &string);
if (r < 0) {
break;
}
@@ -619,7 +669,7 @@ init_local_config_with_workaround(char c
if (r < 0 || r > (int) sizeof(node_name)) {
break;
}
- r = snd_config_search(lconf, node_name, &pcm_node);
+ r = WRAP(snd_config_search)(lconf, node_name, &pcm_node);
if (r < 0) {
break;
}
@@ -630,12 +680,12 @@ init_local_config_with_workaround(char c
}
/* Fetch the PCM node's type, and bail out if it's not the PulseAudio plugin. */
- r = snd_config_search(pcm_node, "type", &node);
+ r = WRAP(snd_config_search)(pcm_node, "type", &node);
if (r < 0) {
break;
}
- r = snd_config_get_string(node, &string);
+ r = WRAP(snd_config_get_string)(node, &string);
if (r < 0) {
break;
}
@@ -646,18 +696,18 @@ init_local_config_with_workaround(char c
/* Don't clobber an explicit existing handle_underrun value, set it only
if it doesn't already exist. */
- r = snd_config_search(pcm_node, "handle_underrun", &node);
+ r = WRAP(snd_config_search)(pcm_node, "handle_underrun", &node);
if (r != -ENOENT) {
break;
}
/* Disable pcm_pulse's asynchronous underrun handling. */
- r = snd_config_imake_integer(&node, "handle_underrun", 0);
+ r = WRAP(snd_config_imake_integer)(&node, "handle_underrun", 0);
if (r < 0) {
break;
}
- r = snd_config_add(pcm_node, node);
+ r = WRAP(snd_config_add)(pcm_node, node);
if (r < 0) {
break;
}
@@ -665,7 +715,7 @@ init_local_config_with_workaround(char c
return lconf;
} while (0);
- snd_config_delete(lconf);
+ WRAP(snd_config_delete)(lconf);
return NULL;
}
@@ -677,9 +727,9 @@ alsa_locked_pcm_open(snd_pcm_t ** pcm, c
pthread_mutex_lock(&cubeb_alsa_mutex);
if (local_config) {
- r = snd_pcm_open_lconf(pcm, pcm_name, stream, SND_PCM_NONBLOCK, local_config);
+ r = WRAP(snd_pcm_open_lconf)(pcm, pcm_name, stream, SND_PCM_NONBLOCK, local_config);
} else {
- r = snd_pcm_open(pcm, pcm_name, stream, SND_PCM_NONBLOCK);
+ r = WRAP(snd_pcm_open)(pcm, pcm_name, stream, SND_PCM_NONBLOCK);
}
pthread_mutex_unlock(&cubeb_alsa_mutex);
@@ -692,7 +742,7 @@ alsa_locked_pcm_close(snd_pcm_t * pcm)
int r;
pthread_mutex_lock(&cubeb_alsa_mutex);
- r = snd_pcm_close(pcm);
+ r = WRAP(snd_pcm_close)(pcm);
pthread_mutex_unlock(&cubeb_alsa_mutex);
return r;
@@ -755,12 +805,65 @@ alsa_init(cubeb ** context, char const *
pthread_attr_t attr;
snd_pcm_t * dummy;
+ void * libasound = NULL;
+
+#ifndef DISABLE_LIBASOUND_DLOPEN
+ libasound = dlopen("libasound.so", RTLD_LAZY);
+ if (!libasound) {
+ return CUBEB_ERROR;
+ }
+
+#define LOAD(x) do { \
+ cubeb_##x = dlsym(libasound, #x); \
+ if (!cubeb_##x) { \
+ dlclose(libasound); \
+ return CUBEB_ERROR; \
+ } \
+ } while(0)
+
+ LOAD(snd_config);
+ LOAD(snd_config_add);
+ LOAD(snd_config_copy);
+ LOAD(snd_config_delete);
+ LOAD(snd_config_get_id);
+ LOAD(snd_config_get_string);
+ LOAD(snd_config_imake_integer);
+ LOAD(snd_config_search);
+ LOAD(snd_config_search_definition);
+ LOAD(snd_lib_error_set_handler);
+ LOAD(snd_pcm_avail_update);
+ LOAD(snd_pcm_close);
+ LOAD(snd_pcm_delay);
+ LOAD(snd_pcm_drain);
+ LOAD(snd_pcm_frames_to_bytes);
+ LOAD(snd_pcm_get_params);
+ /* snd_pcm_hw_params_alloca is actually a macro */
+ /* LOAD(snd_pcm_hw_params_alloca); */
+ LOAD(snd_pcm_hw_params_sizeof);
+ LOAD(snd_pcm_hw_params_any);
+ LOAD(snd_pcm_hw_params_get_channels_max);
+ LOAD(snd_pcm_hw_params_get_rate);
+ LOAD(snd_pcm_hw_params_set_rate_near);
+ LOAD(snd_pcm_nonblock);
+ LOAD(snd_pcm_open);
+ LOAD(snd_pcm_open_lconf);
+ LOAD(snd_pcm_pause);
+ LOAD(snd_pcm_poll_descriptors);
+ LOAD(snd_pcm_poll_descriptors_count);
+ LOAD(snd_pcm_poll_descriptors_revents);
+ LOAD(snd_pcm_recover);
+ LOAD(snd_pcm_set_params);
+ LOAD(snd_pcm_state);
+ LOAD(snd_pcm_writei);
+
+#undef LOAD
+#endif
assert(context);
*context = NULL;
pthread_mutex_lock(&cubeb_alsa_mutex);
if (!cubeb_alsa_error_handler_set) {
- snd_lib_error_set_handler(silent_error_handler);
+ WRAP(snd_lib_error_set_handler)(silent_error_handler);
cubeb_alsa_error_handler_set = 1;
}
pthread_mutex_unlock(&cubeb_alsa_mutex);
@@ -768,6 +871,8 @@ alsa_init(cubeb ** context, char const *
ctx = calloc(1, sizeof(*ctx));
assert(ctx);
+ ctx->libasound = libasound;
+
ctx->ops = &alsa_ops;
r = pthread_mutex_init(&ctx->mutex, NULL);
@@ -817,7 +922,7 @@ alsa_init(cubeb ** context, char const *
config fails with EINVAL, the PA PCM is too old for this workaround. */
if (r == -EINVAL) {
pthread_mutex_lock(&cubeb_alsa_mutex);
- snd_config_delete(ctx->local_config);
+ WRAP(snd_config_delete)(ctx->local_config);
pthread_mutex_unlock(&cubeb_alsa_mutex);
ctx->local_config = NULL;
} else if (r >= 0) {
@@ -857,9 +962,13 @@ alsa_destroy(cubeb * ctx)
pthread_mutex_destroy(&ctx->mutex);
free(ctx->fds);
+ if (ctx->libasound) {
+ dlclose(ctx->libasound);
+ }
+
if (ctx->local_config) {
pthread_mutex_lock(&cubeb_alsa_mutex);
- snd_config_delete(ctx->local_config);
+ WRAP(snd_config_delete)(ctx->local_config);
pthread_mutex_unlock(&cubeb_alsa_mutex);
}
@@ -942,7 +1051,7 @@ alsa_stream_init_single(cubeb * ctx, cub
return CUBEB_ERROR;
}
- r = snd_pcm_nonblock(stm->pcm, 1);
+ r = WRAP(snd_pcm_nonblock)(stm->pcm, 1);
assert(r == 0);
latency_us = latency_frames * 1e6 / stm->params.rate;
@@ -955,7 +1064,7 @@ alsa_stream_init_single(cubeb * ctx, cub
latency_us = latency_us < min_latency ? min_latency: latency_us;
}
- r = snd_pcm_set_params(stm->pcm, format, SND_PCM_ACCESS_RW_INTERLEAVED,
+ r = WRAP(snd_pcm_set_params)(stm->pcm, format, SND_PCM_ACCESS_RW_INTERLEAVED,
stm->params.channels, stm->params.rate, 1,
latency_us);
if (r < 0) {
@@ -963,20 +1072,20 @@ alsa_stream_init_single(cubeb * ctx, cub
return CUBEB_ERROR_INVALID_FORMAT;
}
- r = snd_pcm_get_params(stm->pcm, &stm->buffer_size, &period_size);
+ r = WRAP(snd_pcm_get_params)(stm->pcm, &stm->buffer_size, &period_size);
assert(r == 0);
/* Double internal buffer size to have enough space when waiting for the other side of duplex connection */
stm->buffer_size *= 2;
- stm->buffer = calloc(1, snd_pcm_frames_to_bytes(stm->pcm, stm->buffer_size));
+ stm->buffer = calloc(1, WRAP(snd_pcm_frames_to_bytes)(stm->pcm, stm->buffer_size));
assert(stm->buffer);
- stm->nfds = snd_pcm_poll_descriptors_count(stm->pcm);
+ stm->nfds = WRAP(snd_pcm_poll_descriptors_count)(stm->pcm);
assert(stm->nfds > 0);
stm->saved_fds = calloc(stm->nfds, sizeof(struct pollfd));
assert(stm->saved_fds);
- r = snd_pcm_poll_descriptors(stm->pcm, stm->saved_fds, stm->nfds);
+ r = WRAP(snd_pcm_poll_descriptors)(stm->pcm, stm->saved_fds, stm->nfds);
assert((nfds_t) r == stm->nfds);
if (alsa_register_stream(ctx, stm) != 0) {
@@ -1048,7 +1157,7 @@ alsa_stream_destroy(cubeb_stream * stm)
pthread_mutex_lock(&stm->mutex);
if (stm->pcm) {
if (stm->state == DRAINING) {
- snd_pcm_drain(stm->pcm);
+ WRAP(snd_pcm_drain)(stm->pcm);
}
alsa_locked_pcm_close(stm->pcm);
stm->pcm = NULL;
@@ -1094,12 +1203,12 @@ alsa_get_max_channel_count(cubeb * ctx,
assert(stm);
- r = snd_pcm_hw_params_any(stm->pcm, hw_params);
+ r = WRAP(snd_pcm_hw_params_any)(stm->pcm, hw_params);
if (r < 0) {
return CUBEB_ERROR;
}
- r = snd_pcm_hw_params_get_channels_max(hw_params, max_channels);
+ r = WRAP(snd_pcm_hw_params_get_channels_max)(hw_params, max_channels);
if (r < 0) {
return CUBEB_ERROR;
}
@@ -1120,34 +1229,34 @@ alsa_get_preferred_sample_rate(cubeb * c
/* get a pcm, disabling resampling, so we get a rate the
* hardware/dmix/pulse/etc. supports. */
- r = snd_pcm_open(&pcm, CUBEB_ALSA_PCM_NAME, SND_PCM_STREAM_PLAYBACK, SND_PCM_NO_AUTO_RESAMPLE);
+ r = WRAP(snd_pcm_open)(&pcm, CUBEB_ALSA_PCM_NAME, SND_PCM_STREAM_PLAYBACK, SND_PCM_NO_AUTO_RESAMPLE);
if (r < 0) {
return CUBEB_ERROR;
}
- r = snd_pcm_hw_params_any(pcm, hw_params);
+ r = WRAP(snd_pcm_hw_params_any)(pcm, hw_params);
if (r < 0) {
- snd_pcm_close(pcm);
+ WRAP(snd_pcm_close)(pcm);
return CUBEB_ERROR;
}
- r = snd_pcm_hw_params_get_rate(hw_params, rate, &dir);
+ r = WRAP(snd_pcm_hw_params_get_rate)(hw_params, rate, &dir);
if (r >= 0) {
/* There is a default rate: use it. */
- snd_pcm_close(pcm);
+ WRAP(snd_pcm_close)(pcm);
return CUBEB_OK;
}
/* Use a common rate, alsa may adjust it based on hw/etc. capabilities. */
*rate = 44100;
- r = snd_pcm_hw_params_set_rate_near(pcm, hw_params, rate, NULL);
+ r = WRAP(snd_pcm_hw_params_set_rate_near)(pcm, hw_params, rate, NULL);
if (r < 0) {
- snd_pcm_close(pcm);
+ WRAP(snd_pcm_close)(pcm);
return CUBEB_ERROR;
}
- snd_pcm_close(pcm);
+ WRAP(snd_pcm_close)(pcm);
return CUBEB_OK;
}
@@ -1180,10 +1289,10 @@ alsa_stream_start(cubeb_stream * stm)
pthread_mutex_lock(&stm->mutex);
/* Capture pcm must be started after initial setup/recover */
if (stm->stream_type == SND_PCM_STREAM_CAPTURE &&
- snd_pcm_state(stm->pcm) == SND_PCM_STATE_PREPARED) {
- snd_pcm_start(stm->pcm);
+ WRAP(snd_pcm_state)(stm->pcm) == SND_PCM_STATE_PREPARED) {
+ WRAP(snd_pcm_start)(stm->pcm);
}
- snd_pcm_pause(stm->pcm, 0);
+ WRAP(snd_pcm_pause)(stm->pcm, 0);
gettimeofday(&stm->last_activity, NULL);
pthread_mutex_unlock(&stm->mutex);
@@ -1223,7 +1332,7 @@ alsa_stream_stop(cubeb_stream * stm)
pthread_mutex_unlock(&ctx->mutex);
pthread_mutex_lock(&stm->mutex);
- snd_pcm_pause(stm->pcm, 1);
+ WRAP(snd_pcm_pause)(stm->pcm, 1);
pthread_mutex_unlock(&stm->mutex);
return CUBEB_OK;
@@ -1239,8 +1348,8 @@ alsa_stream_get_position(cubeb_stream *
pthread_mutex_lock(&stm->mutex);
delay = -1;
- if (snd_pcm_state(stm->pcm) != SND_PCM_STATE_RUNNING ||
- snd_pcm_delay(stm->pcm, &delay) != 0) {
+ if (WRAP(snd_pcm_state)(stm->pcm) != SND_PCM_STATE_RUNNING ||
+ WRAP(snd_pcm_delay)(stm->pcm, &delay) != 0) {
*position = stm->last_position;
pthread_mutex_unlock(&stm->mutex);
return CUBEB_OK;
@@ -1265,7 +1374,7 @@ alsa_stream_get_latency(cubeb_stream * s
snd_pcm_sframes_t delay;
/* This function returns the delay in frames until a frame written using
snd_pcm_writei is sent to the DAC. The DAC delay should be < 1ms anyways. */
- if (snd_pcm_delay(stm->pcm, &delay)) {
+ if (WRAP(snd_pcm_delay)(stm->pcm, &delay)) {
return CUBEB_ERROR;
}
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