From 6b44e40ee8dba415213468afe14f7202b42ec429 Mon Sep 17 00:00:00 2001
From: Jeff Epler <jepler@gmail.com>
Date: Wed, 24 Jul 2019 20:57:32 -0500
Subject: audiocore: Factor from audioio

When nrf pwm audio is introduced, it will be called `audiopwmio`.  To
enable code sharing with the existing (dac-based) `audioio`, factor
the sample and mixer types to `audiocore`.

INCOMPATIBLE CHANGE: Now, `Mixer`, `RawSample` and `WaveFile` must
be imported from `audiocore`, not `audioio`.
---
 shared-module/audiocore/RawSample.c | 94 +++++++++++++++++++++++++++++++++++++
 1 file changed, 94 insertions(+)
 create mode 100644 shared-module/audiocore/RawSample.c

(limited to 'shared-module/audiocore/RawSample.c')

diff --git a/shared-module/audiocore/RawSample.c b/shared-module/audiocore/RawSample.c
new file mode 100644
index 000000000..d6bf3a567
--- /dev/null
+++ b/shared-module/audiocore/RawSample.c
@@ -0,0 +1,94 @@
+/*
+ * This file is part of the Micro Python project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2018 Scott Shawcroft for Adafruit Industries
+ *
+ * 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 "shared-bindings/audiocore/RawSample.h"
+
+#include <stdint.h>
+
+#include "shared-module/audiocore/RawSample.h"
+
+void common_hal_audioio_rawsample_construct(audioio_rawsample_obj_t* self,
+                                            uint8_t* buffer,
+                                            uint32_t len,
+                                            uint8_t bytes_per_sample,
+                                            bool samples_signed,
+                                            uint8_t channel_count,
+                                            uint32_t sample_rate) {
+    self->buffer = buffer;
+    self->bits_per_sample = bytes_per_sample * 8;
+    self->samples_signed = samples_signed;
+    self->len = len;
+    self->channel_count = channel_count;
+    self->sample_rate = sample_rate;
+    self->buffer_read = false;
+}
+
+void common_hal_audioio_rawsample_deinit(audioio_rawsample_obj_t* self) {
+    self->buffer = NULL;
+}
+bool common_hal_audioio_rawsample_deinited(audioio_rawsample_obj_t* self) {
+    return self->buffer == NULL;
+}
+
+uint32_t common_hal_audioio_rawsample_get_sample_rate(audioio_rawsample_obj_t* self) {
+    return self->sample_rate;
+}
+void common_hal_audioio_rawsample_set_sample_rate(audioio_rawsample_obj_t* self,
+                                                  uint32_t sample_rate) {
+    self->sample_rate = sample_rate;
+}
+
+void audioio_rawsample_reset_buffer(audioio_rawsample_obj_t* self,
+                                    bool single_channel,
+                                    uint8_t channel) {
+}
+
+audioio_get_buffer_result_t audioio_rawsample_get_buffer(audioio_rawsample_obj_t* self,
+                                                         bool single_channel,
+                                                         uint8_t channel,
+                                                         uint8_t** buffer,
+                                                         uint32_t* buffer_length) {
+    *buffer_length = self->len;
+    if (single_channel) {
+        *buffer = self->buffer + (channel % self->channel_count) * (self->bits_per_sample / 8);
+    } else {
+        *buffer = self->buffer;
+    }
+    return GET_BUFFER_DONE;
+}
+
+void audioio_rawsample_get_buffer_structure(audioio_rawsample_obj_t* self, bool single_channel,
+                                            bool* single_buffer, bool* samples_signed,
+                                            uint32_t* max_buffer_length, uint8_t* spacing) {
+    *single_buffer = true;
+    *samples_signed = self->samples_signed;
+    *max_buffer_length = self->len;
+    if (single_channel) {
+        *spacing = self->channel_count;
+    } else {
+        *spacing = 1;
+    }
+}
-- 
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