From 2e4e8a00b27182a155cb10f0a00e44977bfcd5cf Mon Sep 17 00:00:00 2001
From: "Suren A. Chilingaryan" <csa@dside.dyndns.org>
Date: Mon, 12 Dec 2011 05:45:35 +0100
Subject: multithread preprocessing of ipecamera frames and code reorganization

---
 ipecamera/events.c | 121 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 121 insertions(+)
 create mode 100644 ipecamera/events.c

(limited to 'ipecamera/events.c')

diff --git a/ipecamera/events.c b/ipecamera/events.c
new file mode 100644
index 0000000..58d2971
--- /dev/null
+++ b/ipecamera/events.c
@@ -0,0 +1,121 @@
+#define _IPECAMERA_IMAGE_C
+#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 "../tools.h"
+#include "../error.h"
+
+#include "pcilib.h"
+#include "public.h"
+#include "private.h"
+#include "events.h"
+
+int ipecamera_stream(pcilib_context_t *vctx, pcilib_event_callback_t callback, void *user) {
+    int 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;
+    }
+
+    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;
+    }
+    
+	// This loop iterates while the generation
+    while ((ctx->run_streamer)||(ctx->reported_id != ctx->event_id)) {
+	while (ctx->reported_id != ctx->event_id) {
+	    if ((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) {
+		err = callback(ctx->reported_id, (pcilib_event_info_t*)&info, user);
+		if (err <= 0) {
+		    if (err < 0) err = -err;
+		    break;
+		}
+	    }
+	}
+	usleep(IPECAMERA_NOFRAME_SLEEP);
+    }
+
+    ctx->streaming = 0;
+
+    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) {
+    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->reported_id == ctx->event_id) {
+	if (timeout) {
+	    pcilib_calc_deadline(&tv, timeout);
+	    
+	    while ((pcilib_calc_time_to_deadline(&tv) > 0)&&(ctx->reported_id == ctx->event_id))
+		usleep(IPECAMERA_NOFRAME_SLEEP);
+	}
+	
+	if (ctx->reported_id == ctx->event_id) return PCILIB_ERROR_TIMEOUT;
+    }
+
+retry:
+    if ((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
+	    return PCILIB_ERROR_INVALID_ARGUMENT;
+    }
+    
+    if ((ctx->event_id - ctx->reported_id) >= ctx->buffer_size) goto retry;
+    
+    return 0;
+}
+
-- 
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