update cspot

components/spotify/cspot/bell/src/audio/codec/AACDecoder.cpp

@@ -0,0 +1,37 @@
+// Copyright (c) Kuba Szczodrzyński 2022-1-12.
+
+#include "AACDecoder.h"
+
+AACDecoder::AACDecoder() {
+	aac = AACInitDecoder();
+	pcmData = (int16_t *)malloc(AAC_MAX_NSAMPS * AAC_MAX_NCHANS * sizeof(int16_t));
+}
+
+AACDecoder::~AACDecoder() {
+	AACFreeDecoder(aac);
+	free(pcmData);
+}
+
+bool AACDecoder::setup(uint32_t sampleRate, uint8_t channelCount, uint8_t bitDepth) {
+	frame.sampRateCore = (int)sampleRate;
+	frame.nChans = channelCount;
+	frame.bitsPerSample = bitDepth;
+	return AACSetRawBlockParams(aac, 0, &frame) == 0;
+}
+
+uint8_t *AACDecoder::decode(uint8_t *inData, uint32_t inLen, uint32_t &outLen) {
+	if (!inData)
+		return nullptr;
+	int status = AACDecode(
+		aac,
+		static_cast<unsigned char **>(&inData),
+		reinterpret_cast<int *>(&inLen),
+		static_cast<short *>(this->pcmData));
+	AACGetLastFrameInfo(aac, &frame);
+	if (status != ERR_AAC_NONE) {
+		lastErrno = status;
+		return nullptr;
+	}
+	outLen = frame.outputSamps * sizeof(int16_t);
+	return (uint8_t *)pcmData;
+}