152 lines
4.5 KiB
C
152 lines
4.5 KiB
C
/*
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* Copyright (c) XMEDIA. All rights reserved.
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*/
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#ifndef _AUDIO_CODEC_MP3_H_
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#define _AUDIO_CODEC_MP3_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 MP3LC and MP3Plus */
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#define MP3_SAMPLES_PER_FRAME 1152
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/*max length of MP3 stream by bytes */
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#define MAX_MP3_MAINBUF_SIZE 1152 * 2
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typedef enum
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{
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MP3_BPS_8K = 8000,
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MP3_BPS_16K = 16000,
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MP3_BPS_24K = 24000,
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MP3_BPS_32K = 32000,
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MP3_BPS_40K = 40000,
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MP3_BPS_48K = 48000,
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MP3_BPS_56K = 56000,
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MP3_BPS_64K = 64000,
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MP3_BPS_80K = 80000,
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MP3_BPS_96K = 96000,
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MP3_BPS_112K = 112000,
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MP3_BPS_128K = 128000,
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MP3_BPS_144K = 144000,
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MP3_BPS_160K = 160000,
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MP3_BPS_192K = 192000,
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MP3_BPS_224K = 224000,
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MP3_BPS_256K = 256000,
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MP3_BPS_320K = 320000,
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MP3_BPS_MAX
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} mp3_bps;
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typedef enum
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{
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MP3_VBR_OFF=0,
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MP3_VBR_MT, /* obsolete, same as vbr_mtrh */
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MP3_VBR_RH,
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MP3_VBR_ABR,
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MP3_VBR_MTRH,
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MP3_VBR_MAX_INDICATOR, /* Don't use this! It's used for sanity checks. */
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MP3_VBR_DEFAULT=MP3_VBR_MTRH /* change this to change the default VBR mode of LAME */
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} mp3_vbr_mode;
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typedef struct
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{
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/*vbr_off for constant bitrate
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vbr_abr for variable bitrate abr mode
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vbr_default for variable bitrate vbr mode
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*/
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mp3_vbr_mode mode;
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/* quality setting 0..9., default is 7
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0 = slowest algorithms, but potentially highest quality
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9 = faster algorithms, very poor quality
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*/
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xmedia_u32 quality;
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/*
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MPEG-1 layer III sample frequencies (kHz): 32 48 44.1
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bitrates (kbps): 32 40 48 56 64 80 96 112 128 160 192 224 256 320
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MPEG-2 layer III sample frequencies (kHz): 16 24 22.05
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bitrates (kbps): 8 16 24 32 40 48 56 64 80 96 112 128 144 160
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MPEG-2.5 layer III sample frequencies (kHz): 8 12 11.025
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bitrates (kbps): 8 16 24 32 40 48 56 64
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The bitrate to be used. Default is 128kbps in MPEG1 (64 for mono),
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64kbps in MPEG2 (32 for mono) and 32kbps in MPEG2.5 (16 for mono).
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*/
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mp3_bps bit_rate;
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xmedia_s32 bit_per_sample;
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xmedia_u32 channels;
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xmedia_u32 sample_rate;
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} mp3_encoder_config;
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typedef struct
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{
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xmedia_void* reversed;
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} mp3_decoder_config;
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#define mp3_enc_get_default_config(config) \
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do { \
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((mp3_encoder_config *)(config))->quality = 7; \
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((mp3_encoder_config *)(config))->bit_rate = MP3_BPS_128K; \
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((mp3_encoder_config *)(config))->sample_rate = 48000; \
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((mp3_encoder_config *)(config))->channels = 2; \
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((mp3_encoder_config *)(config))->bit_per_sample = 16; \
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((mp3_encoder_config *)(config))->mode = MP3_VBR_OFF; \
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} while (0)
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#define mp3_enc_get_default_param(open_param, private_config) \
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do { \
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xmedia_u32 in_sample_per_frame = 1152; \
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((encoder_param *)(open_param))->channels = \
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((mp3_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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((mp3_encoder_config *)private_config)->bit_per_sample; \
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((encoder_param *)(open_param))->sample_rate = \
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((mp3_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 mp3_dec_get_default_config(config) \
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do { \
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} while (0)
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#define mp3_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_mp3_enc_get_handle(xmedia_void);
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/*
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* 函数功能：获取mp3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_mp3_dec_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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