update cspot

components/spotify/cspot/bell/include/audio/codec/BaseCodec.h

@@ -0,0 +1,39 @@
+// Copyright (c) Kuba Szczodrzyński 2022-1-12.
+
+#pragma once
+
+#include "BaseContainer.h"
+
+class BaseCodec {
+  public:
+	/**
+	 * Setup the codec (sample rate, channel count, etc) using the specified container.
+	 */
+	virtual bool setup(BaseContainer *container);
+	/**
+	 * Setup the codec manually, using the provided values.
+	 */
+	virtual bool setup(uint32_t sampleRate, uint8_t channelCount, uint8_t bitDepth) = 0;
+	/**
+	 * Decode the given sample.
+	 *
+	 * @param [in] inData encoded data. Should allow nullptr, in which case nullptr should be returned.
+	 * @param [in] inLen size of inData, in bytes
+	 * @param [out] outLen size of output PCM data, in bytes
+	 * @return pointer to decoded raw PCM audio data, allocated inside the codec object; nullptr on failure
+	 */
+	virtual uint8_t *decode(uint8_t *inData, uint32_t inLen, uint32_t &outLen) = 0;
+	/**
+	 * Read a single sample from the container, decode it, and return the result.
+	 *
+	 * @param [in] container media container to read the sample from (the container's codec must match this instance)
+	 * @param [out] outLen size of output PCM data, in bytes
+	 * @return pointer to decoded raw PCM audio data, allocated inside the codec object; nullptr on failure
+	 */
+	uint8_t *decode(BaseContainer *container, uint32_t &outLen);
+	/**
+	 * Last error that occurred, this is a codec-specific value.
+	 * This may be set by a codec upon decoding failure.
+	 */
+	int lastErrno = -1;
+};