forked/ustreamer
1
0
Fork 0
mirror of https://github.com/pikvm/ustreamer.git synced 2026-02-27 12:16:31 +00:00
Code Issues Packages Projects Releases Wiki Activity

Issue #56: busyloop-based _vcos_semwait()

Browse Source
This commit is contained in:
Devaev Maxim
2020-11-13 17:02:00 +03:00
parent f1a869a215
commit 28563abdbc
1 changed files with 32 additions and 7 deletions
Download Patch File Download Diff File Expand all files Collapse all files

39
src/encoders/omx/encoder.c
View File

@@ -23,6 +23,7 @@
#include "encoder.h"
#include <stdlib.h>
#include <stdbool.h>
#include <string.h>
#include <unistd.h>
#include <assert.h>
@@ -51,6 +52,7 @@ static const OMX_U32 _OUTPUT_PORT = 341;
static int _i_omx = 0;
static int _vcos_semwait(VCOS_SEMAPHORE_T *sem, long double timeout);
static int _omx_init_component(struct omx_encoder_t *omx);
static int _omx_init_disable_ports(struct omx_encoder_t *omx);
static int _omx_setup_input(struct omx_encoder_t *omx, struct device_t *dev);
@@ -180,7 +182,6 @@ int omx_encoder_compress_buffer(struct omx_encoder_t *omx, struct device_t *dev,
# define OUT(_next) omx->output_buffer->_next
OMX_ERRORTYPE error;
VCOS_STATUS_T sem_status;
size_t slice_size = (IN(nAllocLen) < HW_BUFFER(used) ? IN(nAllocLen) : HW_BUFFER(used));
size_t pos = 0;
@@ -237,12 +238,8 @@ int omx_encoder_compress_buffer(struct omx_encoder_t *omx, struct device_t *dev,
}
}
// vcos_semaphore_wait(&omx->handler_sem);
switch (sem_status = vcos_semaphore_wait_timeout(&omx->handler_sem, 3000)) {
case VCOS_SUCCESS: break;
case VCOS_EAGAIN: LOG_ERROR("Can't wait VCOS semaphore: EAGAIN (timeout)"); return -1;
case VCOS_EINVAL: LOG_ERROR("Can't wait VCOS semaphore: EINVAL"); return -1;
default: LOG_ERROR("Can't wait VCOS semaphore: %d", sem_status); return -1;
if (_vcos_semwait(&omx->handler_sem, 3.0) != 0) {
return -1;
}
}
@@ -252,6 +249,34 @@ int omx_encoder_compress_buffer(struct omx_encoder_t *omx, struct device_t *dev,
return 0;
}
static int _vcos_semwait(VCOS_SEMAPHORE_T *sem, long double timeout) {
// vcos_semaphore_wait() can wait infinite
// vcos_semaphore_wait_timeout() is broken by design:
// - https://github.com/pikvm/ustreamer/issues/56
// - https://github.com/raspberrypi/userland/issues/658
long double deadline_ts = get_now_monotonic() + timeout;
VCOS_STATUS_T sem_status;
while (true) {
sem_status = vcos_semaphore_trywait(sem);
if (sem_status == VCOS_SUCCESS) {
return 0;
} else if (sem_status != VCOS_EAGAIN || get_now_monotonic() > deadline_ts) {
goto error;
}
usleep(1000);
}
error:
switch (sem_status) {
case VCOS_EAGAIN: LOG_ERROR("Can't wait VCOS semaphore: EAGAIN (timeout)"); break;
case VCOS_EINVAL: LOG_ERROR("Can't wait VCOS semaphore: EINVAL"); break;
default: LOG_ERROR("Can't wait VCOS semaphore: %d", sem_status); break;
}
return -1;
}
static int _omx_init_component(struct omx_encoder_t *omx) {
OMX_ERRORTYPE error;