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https://github.com/oxen-io/session-android.git
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126 lines
3.5 KiB
C++
126 lines
3.5 KiB
C++
#include "AudioCodec.h"
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#include <speex/speex.h>
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//#include <speex/speex_preprocess.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <stdarg.h>
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#include <android/log.h>
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#define TAG "AudioCodec"
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#define ECHO_TAIL_MILLIS 75
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AudioCodec::AudioCodec() : enc(NULL), dec(NULL), aecm(NULL), ns(NULL), initialized(0)
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{ }
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int AudioCodec::init() {
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if ((enc = speex_encoder_init(speex_lib_get_mode(SPEEX_MODEID_NB))) == NULL) {
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__android_log_print(ANDROID_LOG_WARN, TAG, "Encoder failed to initialize!");
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return -1;
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}
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if ((dec = speex_decoder_init(speex_lib_get_mode(SPEEX_MODEID_NB))) == NULL) {
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__android_log_print(ANDROID_LOG_WARN, TAG, "Decoder failed to initialize!");
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return -1;
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}
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if (WebRtcAecm_Create(&aecm) != 0) {
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__android_log_print(ANDROID_LOG_WARN, TAG, "AECM failed to create!");
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return -1;
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}
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if (WebRtcAecm_Init(aecm, SPEEX_SAMPLE_RATE) != 0) {
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__android_log_print(ANDROID_LOG_WARN, TAG, "AECM failed to initialize!");
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return -1;
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}
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// if (WebRtcNsx_Create(&ns) != 0) {
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// __android_log_print(ANDROID_LOG_WARN, TAG, "NS failed to create!");
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// return -1;
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// }
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//
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// if (WebRtcNsx_Init(ns, SPEEX_SAMPLE_RATE) != 0) {
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// __android_log_print(ANDROID_LOG_WARN, TAG, "NS failed to initialize!");
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// return -1;
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// }
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//
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// if (WebRtcNsx_set_policy(ns, 0) != 0) { // "Mild"
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// __android_log_print(ANDROID_LOG_WARN, TAG, "NS policy failed!");
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// return -1;
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// }
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spx_int32_t config = 1;
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speex_decoder_ctl(dec, SPEEX_SET_ENH, &config);
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config = 0;
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speex_encoder_ctl(enc, SPEEX_SET_VBR, &config);
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config = 4;
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speex_encoder_ctl(enc, SPEEX_SET_QUALITY, &config);
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config = 1;
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speex_encoder_ctl(enc, SPEEX_SET_COMPLEXITY, &config);
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speex_encoder_ctl(enc, SPEEX_GET_FRAME_SIZE, &enc_frame_size );
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speex_decoder_ctl(dec, SPEEX_GET_FRAME_SIZE, &dec_frame_size );
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__android_log_print(ANDROID_LOG_WARN, TAG, "Encoding frame size: %d", enc_frame_size);
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__android_log_print(ANDROID_LOG_WARN, TAG, "Decoding frame size: %d", dec_frame_size);
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speex_bits_init(&enc_bits);
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speex_bits_init(&dec_bits);
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initialized = 1;
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return 0;
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}
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AudioCodec::~AudioCodec() {
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if (initialized) {
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speex_bits_destroy( &enc_bits );
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speex_bits_destroy( &dec_bits );
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}
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if (aecm != NULL) WebRtcAecm_Free(aecm);
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if (enc != NULL) speex_encoder_destroy( enc );
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if (dec != NULL) speex_decoder_destroy( dec );
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}
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int AudioCodec::encode(short *rawData, char* encodedData, int maxEncodedDataLen) {
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// short nonoiseData[SPEEX_FRAME_SIZE];
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short cleanData[SPEEX_FRAME_SIZE];
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// WebRtcNsx_Process(ns, rawData, NULL, nonoiseData, NULL);
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// WebRtcNsx_Process(ns, rawData+80, NULL, nonoiseData+80, NULL);
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WebRtcAecm_Process(aecm, rawData, NULL, cleanData, SPEEX_FRAME_SIZE, ECHO_TAIL_MILLIS);
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speex_bits_reset(&enc_bits);
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speex_encode_int(enc, (spx_int16_t *)cleanData, &enc_bits);
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return speex_bits_write(&enc_bits, encodedData, maxEncodedDataLen);
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}
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int AudioCodec::decode(char* encodedData, int encodedDataLen, short *rawData) {
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int rawDataOffset = 0;
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speex_bits_read_from(&dec_bits, encodedData, encodedDataLen);
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while (speex_decode_int(dec, &dec_bits, rawData + rawDataOffset) == 0) { // TODO bounds?
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WebRtcAecm_BufferFarend(aecm, rawData + rawDataOffset, dec_frame_size);
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rawDataOffset += dec_frame_size;
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}
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return rawDataOffset;
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}
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int AudioCodec::conceal(int frames, short *rawData) {
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int i=0;
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for (i=0;i<frames;i++) {
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speex_decode_int(dec, NULL, rawData + (i * dec_frame_size));
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}
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return frames * dec_frame_size;
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}
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