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#define _BSD_SOURCE
#define _GNU_SOURCE
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <sys/time.h>
#include <pthread.h>
#include <assert.h>
#include <ufodecode.h>
#include <pcilib.h>
#include <pcilib/tools.h>
#include <pcilib/error.h>
#include "ipecamera.h"
#include "private.h"
#include "events.h"
#define LOCK(lock_name) \
err = pcilib_lock(ctx->lock_name##_lock); \
if (err) { \
pcilib_error("IPECamera is busy"); \
return PCILIB_ERROR_BUSY; \
} \
ctx->lock_name##_locked = 1;
#define UNLOCK(lock_name) \
if (ctx->lock_name##_locked) { \
pcilib_unlock(ctx->lock_name##_lock); \
ctx->lock_name##_locked = 0; \
}
int ipecamera_stream(pcilib_context_t *vctx, pcilib_event_callback_t callback, void *user) {
int run_flag = 1;
int res, err = 0;
int do_stop = 0;
ipecamera_event_info_t info;
ipecamera_t *ctx = (ipecamera_t*)vctx;
if (!ctx) {
pcilib_error("IPECamera imaging is not initialized");
return PCILIB_ERROR_NOTINITIALIZED;
}
ipecamera_debug(API, "ipecamera: start streaming");
LOCK(stream);
ctx->streaming = 1;
ctx->run_streamer = 1;
if (!ctx->started) {
err = ipecamera_start(vctx, PCILIB_EVENTS_ALL, PCILIB_EVENT_FLAGS_DEFAULT);
if (err) {
ctx->streaming = 0;
return err;
}
do_stop = 1;
}
if (ctx->parse_data) {
// This loop iterates while the generation
while ((run_flag)&&((ctx->run_streamer)||(ctx->reported_id != ctx->event_id))) {
#ifdef IPECAMERA_ANNOUNCE_READY
while (((!ctx->preproc)&&(ctx->reported_id != ctx->event_id))||((ctx->preproc)&&(ctx->reported_id != ctx->preproc_id))) {
#else /* IPECAMERA_ANNOUNCE_READY */
while (ctx->reported_id != ctx->event_id) {
#endif /* IPECAMERA_ANNOUNCE_READY */
if ((ctx->event_id - ctx->reported_id) > (ctx->buffer_size - IPECAMERA_RESERVE_BUFFERS)) {
ipecamera_debug(HARDWARE, "Skipping events %zu to %zu as preprocessing is too slow. We are currently %zu buffers beyond, but only %zu buffers are available and safety limit is %zu",
ctx->reported_id, ctx->event_id - (ctx->buffer_size - 1 - IPECAMERA_RESERVE_BUFFERS), ctx->event_id - ctx->reported_id, ctx->buffer_size, IPECAMERA_RESERVE_BUFFERS);
ctx->reported_id = ctx->event_id - (ctx->buffer_size - 1 - IPECAMERA_RESERVE_BUFFERS);
} else ++ctx->reported_id;
memcpy(&info, ctx->frame + ((ctx->reported_id-1)%ctx->buffer_size), sizeof(ipecamera_event_info_t));
if ((ctx->event_id - ctx->reported_id) < ctx->buffer_size) {
res = callback(ctx->reported_id, (pcilib_event_info_t*)&info, user);
if (res <= 0) {
if (res < 0) err = -res;
run_flag = 0;
break;
}
}
}
usleep(IPECAMERA_NOFRAME_SLEEP);
}
} else {
while ((run_flag)&&(ctx->run_streamer)) {
usleep(IPECAMERA_NOFRAME_SLEEP);
}
}
ctx->streaming = 0;
UNLOCK(stream);
ipecamera_debug(API, "ipecamera: streaming finished");
if (do_stop) {
ipecamera_stop(vctx, PCILIB_EVENT_FLAGS_DEFAULT);
}
return err;
}
int ipecamera_next_event(pcilib_context_t *vctx, pcilib_timeout_t timeout, pcilib_event_id_t *evid, size_t info_size, pcilib_event_info_t *info) {
int err;
struct timeval tv;
ipecamera_t *ctx = (ipecamera_t*)vctx;
if (!ctx) {
pcilib_error("IPECamera imaging is not initialized");
return PCILIB_ERROR_NOTINITIALIZED;
}
if (!ctx->started) {
pcilib_error("IPECamera is not in grabbing mode");
return PCILIB_ERROR_INVALID_REQUEST;
}
if (!ctx->parse_data) {
pcilib_error("RAWData only mode is requested");
return PCILIB_ERROR_INVALID_REQUEST;
}
ipecamera_debug(API, "ipecamera: next_event");
LOCK(stream);
#ifdef IPECAMERA_ANNOUNCE_READY
if (((!ctx->preproc)&&(ctx->reported_id == ctx->event_id))||((ctx->preproc)&&(ctx->reported_id == ctx->preproc_id))) {
#else /* IPECAMERA_ANNOUNCE_READY */
if (ctx->reported_id == ctx->event_id) {
#endif /* IPECAMERA_ANNOUNCE_READY */
if (timeout) {
if (timeout == PCILIB_TIMEOUT_INFINITE) {
#ifdef IPECAMERA_ANNOUNCE_READY
while ((ctx->started)&&(((!ctx->preproc)&&(ctx->reported_id == ctx->event_id))||((ctx->preproc)&&(ctx->reported_id == ctx->preproc_id)))) {
#else /* IPECAMERA_ANNOUNCE_READY */
while ((ctx->started)&&(ctx->reported_id == ctx->event_id)) {
#endif /* IPECAMERA_ANNOUNCE_READY */
usleep(IPECAMERA_NOFRAME_SLEEP);
}
} else {
pcilib_calc_deadline(&tv, timeout);
#ifdef IPECAMERA_ANNOUNCE_READY
while ((ctx->started)&&(pcilib_calc_time_to_deadline(&tv) > 0)&&(((!ctx->preproc)&&(ctx->reported_id == ctx->event_id))||((ctx->preproc)&&(ctx->reported_id == ctx->preproc_id)))) {
#else /* IPECAMERA_ANNOUNCE_READY */
while ((ctx->started)&&(pcilib_calc_time_to_deadline(&tv) > 0)&&(ctx->reported_id == ctx->event_id)) {
#endif /* IPECAMERA_ANNOUNCE_READY */
usleep(IPECAMERA_NOFRAME_SLEEP);
}
}
}
if (ctx->reported_id == ctx->event_id) {
UNLOCK(stream);
ipecamera_debug(API, "ipecamera: next_event timed out");
return PCILIB_ERROR_TIMEOUT;
}
}
retry:
if ((ctx->event_id - ctx->reported_id) > (ctx->buffer_size - IPECAMERA_RESERVE_BUFFERS)) {
ipecamera_debug(HARDWARE, "Skipping events %zu to %zu as preprocessing is too slow. We are currently %zu buffers beyond, but only %zu buffers are available and safety limit is %zu",
ctx->reported_id, ctx->event_id - (ctx->buffer_size - 1 - IPECAMERA_RESERVE_BUFFERS), ctx->event_id - ctx->reported_id, ctx->buffer_size, IPECAMERA_RESERVE_BUFFERS);
ctx->reported_id = ctx->event_id - (ctx->buffer_size - 1 - IPECAMERA_RESERVE_BUFFERS);
} else ++ctx->reported_id;
if (evid) *evid = ctx->reported_id;
if (info) {
if (info_size >= sizeof(ipecamera_event_info_t))
memcpy(info, ctx->frame + ((ctx->reported_id-1)%ctx->buffer_size), sizeof(ipecamera_event_info_t));
else if (info_size >= sizeof(pcilib_event_info_t))
memcpy(info, ctx->frame + ((ctx->reported_id-1)%ctx->buffer_size), sizeof(pcilib_event_info_t));
else {
UNLOCK(stream);
ipecamera_debug(API, "ipecamera: next_event returned a error");
return PCILIB_ERROR_INVALID_ARGUMENT;
}
}
if ((ctx->event_id - ctx->reported_id) >= ctx->buffer_size) goto retry;
UNLOCK(stream);
ipecamera_debug(API, "ipecamera: next_event returned");
return 0;
}
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