preliminary audio support

ports/gprs_a9/Makefile

@@ -139,6 +139,7 @@ SRC_C = \
 	modgps.c \
 	modusocket.c \
 	modi2c.c \
+	modaudio.c \
 	machine_adc.c \
 	machine_uart.c \
 	machine_rtc.c

ports/gprs_a9/modaudio.c

@@ -0,0 +1,196 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * Development of the code in this file was sponsored by Microbric Pty Ltd
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2020 <[email protected]>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include "timeout.h"
+#include "api_os.h"
+#include "api_audio.h"
+#include "api_fs.h"
+#include "py/runtime.h"
+
+uint8_t audioVolume = 5;
+int audioRecordFd = -1;
+
+
+STATIC mp_obj_t modaudio_record_start(size_t n_args, const mp_obj_t *args) {
+    // ========================================
+    // Audio Record.
+    // Args:
+    //     filename (str): output file name with full path
+    //	   channel (int): audio channel (default 2, AUDIO_MODE_LOUDSPEAKER)
+    //	   type (int): audio type (default 3, AUDIO_TYPE_AMR)
+    //	   mode (int): audio mode (default 7, AUDIO_RECORD_MODE_AMR122)
+    // ========================================
+
+    const char* filename;    
+    int channel = AUDIO_MODE_LOUDSPEAKER;
+    int type = AUDIO_TYPE_AMR;
+    int mode = AUDIO_RECORD_MODE_AMR122;
+
+    if (n_args > 0) {
+        filename = mp_obj_str_get_str(args[0]);
+    } else {
+        mp_raise_ValueError("filename is mandatory");
+        return mp_const_none;
+    }
+    if (n_args >= 2) {
+        channel = mp_obj_get_int(args[1]);
+    }
+    if (n_args >= 3) {
+        type = mp_obj_get_int(args[2]);
+    }
+    if (n_args >= 4) {
+        mode = mp_obj_get_int(args[3]);
+    }
+    Trace(1,"audio record start, filename: %s, channel: %d, type: %d, mode: %d", filename, channel, type, mode);
+    audioRecordFd = API_FS_Open(filename,FS_O_WRONLY|FS_O_CREAT|FS_O_TRUNC,0);
+    if (audioRecordFd < 0) {
+        Trace(1,"audio open file error");
+        mp_raise_ValueError("file open error");
+        return mp_const_none;
+    }
+    AUDIO_SetMode(channel);
+    AUDIO_Error_t result =  AUDIO_RecordStart(type, mode, audioRecordFd, NULL, NULL);
+    if (result != AUDIO_ERROR_NO) {
+        Trace(1,"audio record start fail: %d",result);
+        API_FS_Close(audioRecordFd);
+        audioRecordFd = -1;
+        mp_raise_ValueError("cannot record audio file");
+        return mp_const_none;
+    }
+    Trace(1,"recording");
+    return mp_const_none;
+}
+STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(modaudio_record_start_obj, 1, 2, modaudio_record_start);
+
+
+STATIC mp_obj_t modaudio_record_stop(void) {
+    //Stop recording audio
+    AUDIO_RecordStop();
+    API_FS_Close(audioRecordFd);
+    audioRecordFd = -1;
+    return mp_const_none;
+}
+STATIC MP_DEFINE_CONST_FUN_OBJ_0(modaudio_record_stop_obj, modaudio_record_stop);
+
+
+void audioPlayCallback(AUDIO_Error_t result) {
+    Trace(1,"audio play callback result: %d",result);
+    AUDIO_Stop();
+}
+
+
+STATIC mp_obj_t modaudio_play_start(size_t n_args, const mp_obj_t *args) {
+    // ========================================
+    // Audio Play.
+    // Args:
+    //     filename (str): input file name with full path
+    //     volume (int):  (default 5)
+    //	   channel (int): audio channel (default 2, AUDIO_MODE_LOUDSPEAKER)
+    //	   type (int): audio type (default 3, AUDIO_TYPE_AMR)
+    // ========================================
+
+    const char* filename;    
+    int volume = audioVolume;
+    int channel = AUDIO_MODE_LOUDSPEAKER;
+    int type = AUDIO_TYPE_AMR;
+
+    if (n_args > 0) {
+     filename = mp_obj_str_get_str(args[0]);
+    } else {
+        mp_raise_ValueError("filename is mandatory");
+        return mp_const_none;
+    }
+    if (n_args >= 2) {
+        volume = mp_obj_get_int(args[1]); 
+    }
+    if (n_args >= 3) {
+        channel = mp_obj_get_int(args[2]);
+    }
+    if (n_args >= 4) {
+        type = mp_obj_get_int(args[3]);
+    }
+    Trace(1,"play start, filename: %s, volume: %d, channel: %d, type: %d", filename, volume, channel, type);
+    AUDIO_Error_t result = AUDIO_Play(filename, type, audioPlayCallback);
+    if (result != AUDIO_ERROR_NO) {
+        Trace(1,"play fail: %d", result);
+        mp_raise_ValueError("cannot play audio file");        
+        return mp_const_none;        
+    } else {
+        Trace(1,"playing");
+    }
+    OS_Sleep(200);
+    AUDIO_SetMode(channel);
+    AUDIO_SpeakerOpen();
+    AUDIO_SpeakerSetVolume(volume);
+    Trace(1,"playing");
+    return mp_const_none;
+}
+STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(modaudio_play_start_obj, 1, 2, modaudio_play_start);
+
+
+STATIC mp_obj_t modaudio_play_pause(void) {
+    //Pause audio play
+    AUDIO_Pause();
+    return mp_const_none;
+}
+STATIC MP_DEFINE_CONST_FUN_OBJ_0(modaudio_play_pause_obj, modaudio_play_pause);
+
+
+STATIC mp_obj_t modaudio_play_resume(void) {
+   //Resume playing after pause
+   //AUDIO_Resume(fileFd); //?AUDIO_Play doesn't have nor return a fileFd
+   return mp_const_none;
+}
+STATIC MP_DEFINE_CONST_FUN_OBJ_0(modaudio_play_resume_obj, modaudio_play_resume);
+
+
+STATIC mp_obj_t modaudio_play_stop(void) {
+    //Stop playing audio
+    AUDIO_Stop();
+    return mp_const_none;
+}
+STATIC MP_DEFINE_CONST_FUN_OBJ_0(modaudio_play_stop_obj, modaudio_play_stop);
+
+
+STATIC const mp_map_elem_t mp_module_audio_globals_table[] = {
+    { MP_OBJ_NEW_QSTR(MP_QSTR___name__), MP_OBJ_NEW_QSTR(MP_QSTR_audio) },
+
+    { MP_OBJ_NEW_QSTR(MP_QSTR_record_start), (mp_obj_t)&modaudio_record_start_obj },
+    { MP_OBJ_NEW_QSTR(MP_QSTR_record_stop), (mp_obj_t)&modaudio_record_stop_obj },    
+    { MP_OBJ_NEW_QSTR(MP_QSTR_play_start), (mp_obj_t)&modaudio_play_start_obj },
+    { MP_OBJ_NEW_QSTR(MP_QSTR_play_stop), (mp_obj_t)&modaudio_play_stop_obj },
+    { MP_OBJ_NEW_QSTR(MP_QSTR_play_pause), (mp_obj_t)&modaudio_play_pause_obj },
+    { MP_OBJ_NEW_QSTR(MP_QSTR_play_resume), (mp_obj_t)&modaudio_play_resume_obj },
+};
+STATIC MP_DEFINE_CONST_DICT(mp_module_audio_globals, mp_module_audio_globals_table);
+
+
+const mp_obj_module_t audio_module = {
+    .base = { &mp_type_module },
+    .globals = (mp_obj_dict_t*)&mp_module_audio_globals,
+};

ports/gprs_a9/mpconfigport.h

@@ -212,6 +212,7 @@ extern const struct _mp_obj_module_t cellular_module;
 extern const struct _mp_obj_module_t gps_module;
 extern const struct _mp_obj_module_t usocket_module;
 extern const struct _mp_obj_module_t i2c_module;
+extern const struct _mp_obj_module_t audio_module;
 
 #define MICROPY_PORT_BUILTIN_MODULES \
     { MP_OBJ_NEW_QSTR(MP_QSTR_machine), (mp_obj_t)&mp_module_machine }, \
@@ -222,6 +223,7 @@ extern const struct _mp_obj_module_t i2c_module;
     { MP_OBJ_NEW_QSTR(MP_QSTR_gps), (mp_obj_t)&gps_module }, \
     { MP_OBJ_NEW_QSTR(MP_QSTR_usocket), (mp_obj_t)&usocket_module }, \
     { MP_OBJ_NEW_QSTR(MP_QSTR_i2c), (mp_obj_t)&i2c_module }, \
+    { MP_OBJ_NEW_QSTR(MP_QSTR_audio), (mp_obj_t)&audio_module }, \
 
 // type definitions for the specific machine