#ifndef CABLE_MEDIA_H
#define CABLE_MEDIA_H

#include <stddef.h>
#include <stdint.h>

#define CABLE_MEDIA_SESSION_BYTES 16u
#define CABLE_MEDIA_HEADER_BYTES 42u
#define CABLE_MEDIA_MAX_PACKET_BYTES 4096u
#define CABLE_MEDIA_AAC_RATE 48000u
#define CABLE_MEDIA_AAC_BITRATE 96000u
#define CABLE_MEDIA_AAC_CHANNELS 1u
#define CABLE_MEDIA_AAC_SAMPLES 1024u

enum cable_media_kind {
	CABLE_MEDIA_AUDIO_START = 1,
	CABLE_MEDIA_AUDIO_FRAME = 2,
	CABLE_MEDIA_AUDIO_STOP = 3,
	CABLE_MEDIA_VIDEO_START = 4,
	CABLE_MEDIA_VIDEO_FRAME = 5,
	CABLE_MEDIA_VIDEO_STOP = 6
};

typedef struct cable_media_packet {
	uint8_t kind;
	uint8_t session[CABLE_MEDIA_SESSION_BYTES];
	uint64_t sequence;
	uint64_t timestamp_us;
	const uint8_t *payload;
	size_t payload_length;
} cable_media_packet_t;

int cable_media_packet_write(const cable_media_packet_t *packet,
			     uint8_t *output, size_t capacity, size_t *written);
int cable_media_packet_read(cable_media_packet_t *packet,
			    const uint8_t *input, size_t length);

typedef struct cable_aac_encoder { void *implementation; } cable_aac_encoder_t;
typedef struct cable_aac_decoder { void *implementation; } cable_aac_decoder_t;
typedef int (*cable_aac_frame_fn)(void *context, const uint8_t *adts,
				  size_t length);
typedef int (*cable_pcm_samples_fn)(void *context, const int16_t *samples,
				    size_t sample_count);

int cable_aac_encoder_open(cable_aac_encoder_t *encoder);
int cable_aac_encoder_frame(cable_aac_encoder_t *encoder,
			    const int16_t samples[CABLE_MEDIA_AAC_SAMPLES],
			    cable_aac_frame_fn output, void *context);
void cable_aac_encoder_close(cable_aac_encoder_t *encoder);
int cable_aac_decoder_open(cable_aac_decoder_t *decoder);
int cable_aac_decoder_frame(cable_aac_decoder_t *decoder,
			    const uint8_t *adts, size_t length,
			    cable_pcm_samples_fn output, void *context);
void cable_aac_decoder_close(cable_aac_decoder_t *decoder);

#endif