51 lines
1.6 KiB
C
51 lines
1.6 KiB
C
/*
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*****************************************************************
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*
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* Audio 变采样使用demo
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*
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*****************************************************************
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*/
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#include "asm/includes.h"
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#include "media/includes.h"
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#include "system/includes.h"
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#include "app_config.h"
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#include "audio_config.h"
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#include "audio_decode.h"
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#include "app_main.h"
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#include "Resample_api.h"
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/* #include "audio_dec.h" */
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/* #include "clock_cfg.h" */
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static RS_PARA_STRUCT rs_para_obj;
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static RS_STUCT_API *test_rs_api;
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static s16 sin_48k[48] = {
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0, 2139, 4240, 6270, 8192, 9974, 11585, 12998,
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14189, 15137, 15826, 16244, 16384, 16244, 15826, 15137,
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14189, 12998, 11585, 9974, 8192, 6270, 4240, 2139,
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0, -2139, -4240, -6270, -8192, -9974, -11585, -12998,
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-14189, -15137, -15826, -16244, -16384, -16244, -15826, -15137,
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-14189, -12998, -11585, -9974, -8192, -6270, -4240, -2139
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};
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static s16 output_buf[96] = {0};
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void audio_resample_demo(void)
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{
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rs_para_obj.nch = 2; //双声道
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rs_para_obj.new_insample = 48000; //输入采样率
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rs_para_obj.new_outsample = 32000;//输出采样率
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test_rs_api = get_rsfast_context();
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s32 rs_bufsize = test_rs_api->need_buf();
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s16 *rs_buf = malloc(rs_bufsize);
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test_rs_api->open(rs_buf, &rs_para_obj);
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s16 *inbuf = sin_48k; //输入数据的buffer
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s16 *obuf = output_buf; //输出数据的buffer
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u32 len = sizeof(sin_48k) / 2; //输入数据的长度
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u32 rdlen = test_rs_api->run(rs_buf, inbuf, len, obuf); //len是n个s16，数据在 inbuf，返回rdlen个s16 是输出数据的长度,输出数据在obuf
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put_buf(obuf, rdlen); //把输出数据打印出来
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}
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