speex的下载、编译、测试和在android推流端的集成

目录

• 一、概述
• 二、实例
• 三、总结

一、概述

二、实例

1、源码下载和编译

https://github.com/xiph/speex/tree/master，这个是codec库，用于编解码的

https://github.com/xiph/speexdsp，现在只是测试一下speex的去噪部分，speex dsp库

选择对应的tag 版本，下载

 ./autogen.sh;./configure ;make;sudo make install;sudo ldconfig

然后可以看到在/usr/local/include/speex；/usr/local/lib/，里的头文件和库

 2、去噪测试程序

makefile

all:speex-denoise
CC := gcc

CFLAGS := 
GCC_C_INCLUDES += 

GCC_LD_FLAGS +=   
GCC_SHARED_LIBRARIES :=  -lspeexdsp  -lm

speex-denoise : *.o
	$(CC) -o $@ $^ $(GCC_LD_FLAGS) $(GCC_SHARED_LIBRARIES)

*.o : *.c
	$(CC) $(GCC_C_INCLUDES) $(CFLAGS) -o $@ -c $< 

clean:
	rm *.o speex-denoise

程序

#include 
#include 
#include 
#include 


#define NN 1024 * 2

int main(int argc, char **argv) {


    short in[NN];
    int i;
    SpeexPreprocessState *st = NULL;
    int count = 0;
    float f;
    FILE *fin = NULL;
    FILE *fout = NULL;

    if (argc != 3) {
        printf("usage: ./out input.pcm output.pcm.\n");
        return -1;
    }
    
    st = speex_preprocess_state_init(NN, 44100);
    if (st == NULL) {
        fprintf(stderr, "failed to speex_preprocess_state_init.\n");
        return -1;
    }
    i = 1;
    speex_preprocess_ctl(st, SPEEX_PREPROCESS_SET_DENOISE, &i);
    i = 20;
    speex_preprocess_ctl(st, SPEEX_PREPROCESS_SET_NOISE_SUPPRESS, &i);
    i = 0;
    speex_preprocess_ctl(st, SPEEX_PREPROCESS_SET_DEREVERB, &i);
    f = 0.0;
    speex_preprocess_ctl(st, SPEEX_PREPROCESS_SET_DEREVERB_DECAY, &f);
    f = 0.0;
    speex_preprocess_ctl(st, SPEEX_PREPROCESS_SET_DEREVERB_LEVEL, &f);

    fin = fopen(argv[1], "rb");
    if (fin == NULL) {
        fprintf(stderr, "failed to fopen %s.\n", argv[1]);
        return -1;
    }
    fout = fopen(argv[2], "wb+");
    if (fout == NULL) {
        fprintf(stderr, "failed to fopen %s.\n", argv[2]);
        return -1;
    }
    int vad;
    while (!feof(fin)) {
        fread(in, sizeof(short), NN, fin);
        if (feof(fin)) {
            break;
        }
        vad = speex_preprocess_run(st, in);
        fwrite(in, sizeof(short), NN, fout);
    }

    speex_preprocess_state_destroy(st);
    fclose(fin);
    fclose(fout);
    return 0;
}

[16:23:01]In file included from /usr/local/include/speex/speexdsp_types.h:122:0,
[16:23:01]                 from test-denoise.c:3:
[16:23:01]/usr/local/include/speex/speexdsp_config_types.h:12:9: error: unknown type name ‘int16_t’
[16:23:01] typedef int16_t spx_int16_t;
[16:23:01]         ^
[16:23:01]/usr/local/include/speex/speexdsp_config_types.h:13:9: error: unknown type name ‘uint16_t’
[16:23:01] typedef uint16_t spx_uint16_t;
[16:23:01]         ^
[16:23:01]/usr/local/include/speex/speexdsp_config_types.h:14:9: error: unknown type name ‘int32_t’
[16:23:01] typedef int32_t spx_int32_t;
[16:23:01]         ^
[16:23:01]/usr/local/include/speex/speexdsp_config_types.h:15:9: error: unknown type name ‘uint32_t’
[16:23:01] typedef uint32_t spx_uint32_t;
[16:23:01]         ^
[16:23:01]Makefile:15: recipe for target '*.o' failed
[16:23:01]make: *** [*.o] Error 1

出现上面的编译错误，把头文件stdint.h加入

运行：./speex-denoise input_0.pcm output.pcm

波形图：上面为输出，下面为输入

 频谱分析图：上面为输出，下面为输入

 看起来还是有效果的

3、androids上集成

Extern中已经有speex的源码，但是编译的是静态库，修改android.mk，改成编译成动态库

 然后在推流端的audio source端加入处理，结果测试还有有效的

三、总结

只是简单的测试一下，后面还会用webrtc里的audio process模块来测试。只是简单的调库调参