Initial community commit

Src/mp3-mpg123/mkv_mp3_decoder.h

@@ -0,0 +1,49 @@
+#pragma once
+#include "../Plugins/Input/in_mkv/svc_mkvdecoder.h"
+#include "../Plugins/Input/in_mkv/ifc_mkvaudiodecoder.h"
+#include <mpg123.h>
+
+// {A08A5A0C-DEF7-4604-9F35-D5A5E9B1F4DF}
+static const GUID mkv_mp3_guid = 
+{ 0xa08a5a0c, 0xdef7, 0x4604, { 0x9f, 0x35, 0xd5, 0xa5, 0xe9, 0xb1, 0xf4, 0xdf } };
+
+
+class MKVDecoder : public svc_mkvdecoder
+{
+public:
+	static const char *getServiceName() { return "MP3 MKV Decoder"; }
+	static GUID getServiceGuid() { return mkv_mp3_guid; }
+	int CreateAudioDecoder(const char *codec_id, const nsmkv::TrackEntryData *track_entry_data, const nsmkv::AudioData *audio_data, unsigned int preferred_bits, unsigned int preferred_channels, bool floating_point, ifc_mkvaudiodecoder **decoder);
+protected:
+	RECVS_DISPATCH;
+};
+
+class MKVMP3Decoder : public ifc_mkvaudiodecoder
+{
+public:
+	MKVMP3Decoder(mpg123_handle *mp3, unsigned int bps, unsigned max_channels, bool floating_point);
+	~MKVMP3Decoder();
+
+protected:
+	RECVS_DISPATCH;
+private:
+	/* ifc_mkvaudiodecoder implementation */
+	int OutputFrameSize(size_t *frame_size);
+	int GetOutputProperties(unsigned int *sampleRate, unsigned int *channels, unsigned int *bitsPerSample, bool *isFloat);
+	int DecodeBlock(void *inputBuffer, size_t inputBufferBytes, void *outputBuffer, size_t *outputBufferBytes);
+	void Flush();
+	void Close();
+
+private:
+	mpg123_handle *mp3;
+	unsigned int bits;
+	int pregap;
+	unsigned int max_channels;
+	unsigned int channels;
+	unsigned int sample_rate;
+	bool floating_point;
+
+	bool _UpdateProperties();
+	float *decode_buffer;
+	size_t decode_buffer_length;
+};