irmp: introduce PC side shared library code for IRMP core logic

Introduce sources which implement a shared object (DLL) which embeds the
IRMP core logic, receives pin values from an application, and makes IR
detection from previously captured data available in PC environments as
a library, in contrast to the text oriented desktop applications and the
MCU firmware which existed before in the upstream project.

Provided by: Rene Staffen

2 files changed, 196 insertions, 0 deletions

diff --git a/irmp/irmp-main-sharedlib.c b/irmp/irmp-main-sharedlib.c
new file mode 100644
index 0000000..824a05a
--- /dev/null
+++ b/irmp/irmp-main-sharedlib.c
@@ -0,0 +1,105 @@
+/*---------------------------------------------------------------------------------------------------------------------------------------------------
+ * irmpharedLib.h
+ *
+ * Copyright (c) 2009-2019 Frank Meyer - frank(at)fli4l.de
+ * Copyright (c) 2009-2019 René Staffen - r.staffen(at)gmx.de
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *---------------------------------------------------------------------------------------------------------------------------------------------------
+ */
+
+
+#include "irmp.h"
+#include "irmp.c"
+
+
+#ifndef IRMP_DLLEXPORT
+
+#if defined WIN32 && defined _MSC_VER
+# define IRMP_DLLEXPORT __declspec(dllexport)
+#else
+# define IRMP_DLLEXPORT
+#endif
+#endif // !IRMP_DLLEXPORT
+
+#include "irmp-main-sharedlib.h"
+
+
+
+static uint32_t s_endSample = 0;
+
+uint32_t IRMP_GetSampleRate(void) {
+    return F_INTERRUPTS;
+}
+
+
+void IRMP_Reset(void) {
+    IRMP_PIN = 0xff;
+    IRMP_DATA data;
+    int i;
+    for (i = 0; i < (int)(( F_INTERRUPTS )); i++)  // long pause of 1s
+    {
+        (void)irmp_ISR();
+    }
+    (void)irmp_get_data(&data);
+    time_counter = 0;
+    s_startBitSample = 0;
+    s_curSample = 0;
+    s_endSample = 0;
+}
+
+
+uint32_t IRMP_AddSample(const uint8_t i_sample) {
+    IRMP_PIN = i_sample;
+    uint_fast8_t r = irmp_ISR();
+    if (r) {
+        s_endSample = s_curSample;
+        return 1;
+    }
+    s_curSample++;
+    return 0;
+}
+
+
+uint32_t IRMP_GetData(IRMP_DataExt* o_data) {
+
+    IRMP_DATA d;
+    if (irmp_get_data(&d))
+    {  
+        o_data->address      = d.address;
+        o_data->command      = d.command;
+        o_data->protocol     = d.protocol;
+        o_data->protocolName = IRMP_GetProtocolName(d.protocol);
+        o_data->flags        = d.flags;
+        o_data->startSample  = s_startBitSample;
+        o_data->endSample    = s_endSample;
+        return TRUE;
+    }
+    return FALSE;
+}
+
+
+IRMP_DataExt IRMP_Detect(const uint8_t* i_buff, uint32_t i_len) {
+    IRMP_DataExt ret = { 0 };
+    while (s_curSample < i_len) {
+        if (IRMP_AddSample(i_buff[s_curSample])) {
+            IRMP_GetData(&ret);
+            return ret;
+        }
+    }
+    return ret;
+}
+
+
+const char* IRMP_GetProtocolName(uint32_t i_protocol) {
+    if (i_protocol < IRMP_N_PROTOCOLS) {
+        return irmp_protocol_names[i_protocol];
+    }
+    else {
+        return "unknown";
+    }
+}
+
diff --git a/irmp/irmp-main-sharedlib.h b/irmp/irmp-main-sharedlib.h
new file mode 100644
index 0000000..27f8add
--- /dev/null
+++ b/irmp/irmp-main-sharedlib.h
@@ -0,0 +1,91 @@
+/*---------------------------------------------------------------------------------------------------------------------------------------------------
+ * irmpharedLib.h
+ *
+ * Copyright (c) 2009-2019 Frank Meyer - frank(at)fli4l.de
+ * Copyright (c) 2009-2019 René Staffen - r.staffen(at)gmx.de
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *---------------------------------------------------------------------------------------------------------------------------------------------------
+ */
+
+#ifndef IRMP_SHARED_H
+#define IRMP_SHARED_H
+
+#include <stdint.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#ifndef IRMP_DLLEXPORT
+
+#if defined WIN32 && defined _MSC_VER
+# define IRMP_DLLEXPORT __declspec(dllimport)
+#else
+# define IRMP_DLLEXPORT
+#endif
+#endif // !IRMP_DLLEXPORT
+
+
+/**
+ * result data
+ */
+typedef struct
+{ 
+    uint32_t    protocol;     ///< protocol, e.g. NEC_PROTOCOL
+    const char* protocolName; ///< name of the protocol
+    uint32_t    address;      ///< address
+    uint32_t    command;      ///< command
+    uint32_t    flags;        ///< flags currently only repetition (bit 0)
+    uint32_t    startSample;  ///< the sampleindex there the detected command started
+    uint32_t    endSample;    ///< the sampleindex there the detected command ended
+}  IRMP_DataExt;
+
+
+/**
+ * Returns the sample rate for that the irmp library was compiled for.
+ * Any data provided has resamble  this sample rate or detection will fail.
+ */
+IRMP_DLLEXPORT  uint32_t IRMP_GetSampleRate(void);
+
+/**
+ * Resets the internal state of the detector 
+ * This has to be called before start processing data.
+ */
+IRMP_DLLEXPORT  void IRMP_Reset(void);
+
+/**
+ * Feeds a single sample into the detecor.
+ * Returns 1 if a ir command was detected.
+ * Use IRMP_GetData to retrieve the data.
+ * Make sure, that Reset was called before adding first Sample.
+ */
+IRMP_DLLEXPORT  uint32_t IRMP_AddSample(const uint8_t i_sample);
+
+
+/**
+ * Proceses the given buffer and stops on the first found command and returns it data.
+ * Further calls resume the processing at the previously stopped position.
+ * Make sure, that Reset was called before first calling Detect.
+ */
+IRMP_DLLEXPORT  IRMP_DataExt IRMP_Detect(const uint8_t* i_buff, uint32_t i_len);
+
+
+/**
+ * If a valid IR frame was detected the provided output structure is filled
+ * \returns 1 if data was available, 0 else
+ */
+IRMP_DLLEXPORT  uint32_t IRMP_GetData(IRMP_DataExt* o_data);
+
+/** returns the the name of the given protocol number */
+IRMP_DLLEXPORT  const char* IRMP_GetProtocolName(uint32_t i_protocol);
+
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif // IRMP_SHARED_H