#ifndef AUDIOPIPELINE_AUDIO_DEMUXER_ADTS_H__INCLUDED
#define AUDIOPIPELINE_AUDIO_DEMUXER_ADTS_H__INCLUDED

#include <stdbool.h>
#include "audio.h"

/**
 * Creates a demuxer element for ADTS streams
 *
 * This demuxer searches for sync markers, decodes the header to calculate frame length
 * and then will forward the compressed data to the next element in the chain frame by frame.
 *
 * @returns Initialized `AudioPipelineElement` that can be used in call to `audio_pipeline_assemble`
 */
AudioPipelineElement *audio_demuxer_adts(void);


typedef enum {
    ADTSMPEGVersion4 = 0,
    ADTSMPEGVersion2 = 1
} ADTSMPEGVersion;

typedef enum {
    AudioObjectTypeNull = 0,
    AudioObjectTypeAACMain = 1,
    AudioObjectTypeAACLC = 2,
    AudioObjectTypeAACSSR = 3,
    AudioObjectTypeAACLTP = 4,
    AudioObjectTypeSBR = 5,
    AudioObjectTypeAACScalable = 6,
    AudioObjectTypeTwinVQ = 7,
    AudioObjectTypeCELP = 8,
    AudioObjectTypeHXVC = 9,
    AudioObjectTypeReserved1 = 10,
    AudioObjectTypeReserved2 = 11,
    AudioObjectTypeTTSI = 12,
    AudioObjectTypeMainSynthesis = 13,
    AudioObjectTypeWavetableSynthesis = 14,
    AudioObjectTypeGeneralMIDI = 15,
    AudioObjectTypeASAE = 16,
    AudioObjectTypeAACLC_ER = 17,
    AudioObjectTypeReserved3 = 18,
    AudioObjectTypeAACLTP_ER = 19,
    AudioObjectTypeAACScalable_ER = 20,
    AudioObjectTypeTwinVQ_ER = 21,
    AudioObjectTypeBSAC_ER = 22,
    AudioObjectTypeAACLD_ER = 23,
    AudioObjectTypeCELP_ER = 24,
    AudioObjectTypeHVXC_ER = 25,
    AudioObjectTypeHILN_ER = 26,
    AudioObjectTypeParametric_ER = 27,
    AudioObjectTypeSSC = 28,
    AudioObjectTypePS = 29,
    AudioObjectTypeMPEGSurround = 30,
    AudioObjectTypeESCAPE = 31, // Only internally used
    AudioObjectTypeLayer1 = 32,
    AudioObjectTypeLayer2 = 33,
    AudioObjectTypeLayer3 = 34,
    AudioObjectTypeDST = 35,
    AudioObjectTypeALS = 36,
    AudioObjectTypeSLS = 37,
    AudioObjectTypeSLS_non_core = 38,
    AudioObjectTypeAACELD_ER = 39,
    AudioObjectTypeSMR = 40,
    AudioObjectTypeSMRMain = 41,
    AudioObjectTypeUSAC_no_SBR = 42,
    AudioObjectTypeSAOC = 43,
    AudioObjectTypeMPEGSurroundLD = 44,
    AudioObjectTypeUSAC = 45
} MPEG4AudioObjectType;

typedef enum {
    ChannelConfigAOT = 0,                // special config
    ChannelConfigMono = 1,               // 1 channel
    ChannelConfigStereo = 2,             // 2 channels
    ChannelConfig3Front = 3,             // 3 channels
    ChannelConfig3Front1Back = 4,        // 4 channels
    ChannelConfig3Front2Back = 5,        // 5 channels
    ChannelConfig3Front2BackLFE = 6,     // 5.1 channels
    ChannelConfig3Front2Side2BackLFE = 7 // 7.1 channels
} MPEG4ChannelConfig;


typedef struct _ADTSHeader {
    ADTSMPEGVersion version;
    MPEG4AudioObjectType type;
    uint8_t sampleRateIndex;
    MPEG4ChannelConfig channelMode;

    bool has_crc;
    bool has_copyright;
    bool copyright_start;
    bool is_original;
    bool is_private;
    bool is_home;

    uint16_t packetLength;
    uint8_t numAACFrames;
    
    bool valid;
    uint32_t bitrate;
    uint32_t sampleRate;
} ADTSHeader;

ADTSHeader demuxer_adts_decode_header(uint8_t data[7]);

#endif /* AUDIOPIPELINE_AUDIO_DEMUXER_ADTS_H__INCLUDED */