154 lines
5.1 KiB
C
154 lines
5.1 KiB
C
/*
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* Copyright (c) XMEDIA. All rights reserved.
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*/
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#ifndef _AUDIO_CODEC_AAC_H_
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#define _AUDIO_CODEC_AAC_H_
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#include "xmedia_type.h"
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#include "xmedia_audio_codec.h"
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#ifdef __cplusplus
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#if __cplusplus
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extern "C" {
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#endif
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#endif /* End of #ifdef __cplusplus */
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/*samples per frame for AACLC and aacPlus */
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#define AACLD_SAMPLES_PER_FRAME 512
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#define AACLC_SAMPLES_PER_FRAME 1024
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#define AACPLUS_SAMPLES_PER_FRAME 2048
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/*max length of AAC stream by bytes */
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#define MAX_AAC_MAINBUF_SIZE 768*2
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typedef enum
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{
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AAC_TYPE_AACLC = 0,
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AAC_TYPE_EAAC = 1, /* eAAC (HEAAC or AAC+ or aacPlusV1) */
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AAC_TYPE_EAACPLUS = 2, /* eAAC+ (AAC++ or aacPlusV2) */
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AAC_TYPE_AACLD = 3,
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AAC_TYPE_AACELD = 4,
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AAC_TYPE_MAX
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} aac_type;
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typedef enum
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{
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AAC_BPS_8K = 8000,
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AAC_BPS_16K = 16000,
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AAC_BPS_22K = 22000,
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AAC_BPS_24K = 24000,
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AAC_BPS_32K = 32000,
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AAC_BPS_48K = 48000,
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AAC_BPS_64K = 64000,
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AAC_BPS_96K = 96000,
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AAC_BPS_128K = 128000,
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AAC_BPS_256K = 256000,
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AAC_BPS_320K = 320000,
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AAC_BPS_MAX
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} aac_bps;
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typedef enum
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{
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AAC_TRANS_TYPE_ADTS = 0,
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AAC_TRANS_TYPE_LOAS= 1,
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AAC_TRANS_TYPE_MAX
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} aac_trans_type;
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/*
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AAC Commendatory Parameter:
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Sampling Rate(HZ) LC bit_rate(Kbit/s) EAAC bit_rate (Kbit/s) EAAC+ bit_rate (Kbit/s)
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48000 128 48 32,24
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44100 128 48 32,24
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32000 96 22 16
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24000 64
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22050 64
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16000 48
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*/
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typedef struct
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{
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aac_type type; /* AAC profile type */
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aac_bps bit_rate; /* AAC bit_rate (LC:16~320, EAAC:24~128, EAAC+:16~64, AACLD:16~320, AACELD:32~320) */
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xmedia_u32 sample_rate; /* AAC sample rate (LC:8~48, EAAC:16~48, EAAC+:16~48, AACLD:8~48, AACELD:8~48) */
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xmedia_u32 bit_width; /* AAC bit width (only support 16bit) */
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xmedia_u32 channels;
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aac_trans_type trans_type;
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xmedia_u16 band_width; /* targeted audio band_width in Hz (0 or 1000~enSmpRate/2), the default is 0 */
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} aac_encoder_config;
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typedef struct
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{
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aac_trans_type trans_type;
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} aac_decoder_config;
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#define aac_enc_get_default_config(config) \
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do { \
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((aac_encoder_config *)(config))->type = AAC_TYPE_AACLC; \
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((aac_encoder_config *)(config))->bit_width = 16; \
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((aac_encoder_config *)(config))->bit_rate = 128000; \
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((aac_encoder_config *)(config))->sample_rate = 48000; \
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((aac_encoder_config *)(config))->band_width = ((aac_encoder_config *)(config))->sample_rate / 2; \
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((aac_encoder_config *)(config))->channels = 2; \
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((aac_encoder_config *)(config))->trans_type = AAC_TRANS_TYPE_ADTS; \
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} while (0)
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#define aac_enc_get_default_param(open_param, private_config) \
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do { \
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xmedia_u32 in_sample_per_frame = 1024; \
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if ((((aac_encoder_config *)private_config)->type == AAC_TYPE_EAAC) || \
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(((aac_encoder_config *)private_config)->type == AAC_TYPE_EAACPLUS)) { \
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in_sample_per_frame <<= 1; \
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} else if ((((aac_encoder_config *)private_config)->type == AAC_TYPE_AACLD) || \
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(((aac_encoder_config *)private_config)->type == AAC_TYPE_AACELD)) { \
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in_sample_per_frame >>= 1; \
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} \
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((encoder_param *)(open_param))->channels = \
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((aac_encoder_config *)private_config)->channels; \
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((encoder_param *)(open_param))->interleaved = XMEDIA_TRUE; \
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((encoder_param *)(open_param))->bit_per_sample = \
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((aac_encoder_config *)private_config)->bit_width; \
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((encoder_param *)(open_param))->sample_rate = \
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((aac_encoder_config *)private_config)->sample_rate; \
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((encoder_param *)(open_param))->sample_per_frame = in_sample_per_frame; \
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((encoder_param *)(open_param))->encoder_config = (xmedia_void *)private_config; \
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} while (0)
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#define aac_dec_get_default_config(config) \
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do { \
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((aac_decoder_config *)(config))->trans_type = AAC_TRANS_TYPE_ADTS; \
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} while (0)
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#define aac_dec_get_default_param(open_param, private_config) \
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do { \
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((decoder_param *)(open_param))->desired_out_channels = 2; \
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((decoder_param *)(open_param))->desired_out_samplerate = 48000; \
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((decoder_param *)(open_param))->bit_per_sample = 16; \
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((decoder_param *)(open_param))->interleaved = XMEDIA_TRUE; \
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((decoder_param *)(open_param))->decoder_config = (xmedia_void *)private_config; \
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} while (0)
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/*
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* 函数功能：获取aac解码器句柄
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* 函数参数：
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* 无
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* 返回值：
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* 解码器入口句柄
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*/
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audio_decoder* xmedia_aac_dec_get_handle(xmedia_void);
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/*
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* 函数功能：获取aac编码器句柄
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* 函数参数：
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* 无
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* 返回值：
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* 编码器入口句柄
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*/
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audio_encoder* xmedia_aac_enc_get_handle(xmedia_void);
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#ifdef __cplusplus
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#if __cplusplus
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}
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#endif
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#endif /* End of #ifdef __cplusplus */
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#endif
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