Introduce waveform-sink interface

Author: iqyx

services/interfaces/waveform-sink.h

@@ -0,0 +1,51 @@
+/* SPDX-License-Identifier: GPL-3.0-or-later
+ *
+ * Waveform sink interface
+ *
+ * Copyright (c) 2025, Marek Koza (qyx@krtko.org)
+ * All rights reserved.
+ */
+
+#pragma once
+
+#include <stdint.h>
+#include <stdbool.h>
+#include <time.h>
+
+
+typedef enum {
+	WAVEFORM_SINK_RET_OK = 0,
+	WAVEFORM_SINK_RET_FAILED,
+} waveform_sink_ret_t;
+
+/* All formats are in native endianness. */
+enum waveform_sink_format {
+	WAVEFORM_SINK_FORMAT_U8,
+	WAVEFORM_SINK_FORMAT_S8,
+	WAVEFORM_SINK_FORMAT_U16,
+	WAVEFORM_SINK_FORMAT_S16,
+	WAVEFORM_SINK_FORMAT_U32,
+	WAVEFORM_SINK_FORMAT_S32,
+	WAVEFORM_SINK_FORMAT_FLOAT,
+};
+
+typedef struct waveform_sink WaveformSink;
+struct waveform_sink_vmt {
+	waveform_sink_ret_t (*start)(WaveformSink *self);
+	waveform_sink_ret_t (*stop)(WaveformSink *self);
+	waveform_sink_ret_t (*write)(WaveformSink *self, void *data, size_t sample_count);
+	waveform_sink_ret_t (*set_format)(WaveformSink *self, enum waveform_sink_format format, uint32_t channels);
+	waveform_sink_ret_t (*get_format)(WaveformSink *self, enum waveform_sink_format *format, uint32_t *channels);
+	waveform_sink_ret_t (*set_sample_rate)(WaveformSink *self, float sample_rate_Hz);
+	waveform_sink_ret_t (*get_sample_rate)(WaveformSink *self, float *sample_rate_Hz);
+};
+
+typedef struct waveform_sink {
+	const struct waveform_sink_vmt *vmt;
+	void *parent;
+} WaveformSink;
+
+
+
+
+