Be aware that inlen is an in/out parameter. It tells you how many
samples the resampler read. That number can be smaller than what you
passed -- in which case it means you need to buffer them and give them
to the resampler again in the next call.
Jean-Marc
On 11/5/19 8:27 AM, zhouyuchen at iauto.com wrote:> Hello,
> I have encountered some problems. I want to use speex to convert the
> sampling rate (16000->48000).
> When I read 640bytes each time, I found that the sound after the sound
> conversion is very noisy,
> but if I read 6400bytes each time. The conversion will be much better,
> the line is my sample code, am I using it incorrectly? please help confirm?
>
> int main()
> {
> SpeexResamplerState *speex_resampler;
> int err;
> speex_resampler = speex_resampler_init(1, 16000, 48000, 10, &err);
> FILE *fp = fopen("/data/zhou.wav", "rb+");
> FILE *fp2 = fopen("/data/zhou2.wav", "ab+");
> spx_int16_t inbuff[640] = {0};
> spx_int16_t outbuff[1920] = {0};
> spx_uint32_t inlen = 640;
> spx_uint32_t outlen = 1920;
> speex_resampler_skip_zeros(speex_resampler);
> while (1)
> {
> int len = fread(inbuff, 2, 320, fp);
> if (len <= 0)
> {
> break;
> }
> int ret = speex_resampler_process_int(speex_resampler,
> 0,
> inbuff,
> &inlen,
> outbuff,
> &outlen);
> printf("ret is %d\n", ret);
> printf("outlen is %d\n",outlen);
> fwrite(outbuff, 1, outlen, fp2);
> }
>
> return 0;
> }
>
>
>
> ------------------------------------------------------------------------
> 以上
> 如有问题，请联系我
> mail zhouyuchen at iauto.com <mailto:zhouyuchen at iauto.com>
> tel 1905
>
