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118 lines
3.1 KiB
C++
118 lines
3.1 KiB
C++
#include "OpusEncoderImpl.h"
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#include <stdlib.h>
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#include <chrono>
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#include <cstring>
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#include "OpusDecoderImpl.h"
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#define MAX_PACKET_SIZE 3 * 1276
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OpusEncoderImpl::OpusEncoderImpl(int sampleRate, int channel)
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: channel_num(channel), sample_rate(sampleRate) {
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int err;
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int applications[3] = {OPUS_APPLICATION_AUDIO, OPUS_APPLICATION_VOIP,
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OPUS_APPLICATION_RESTRICTED_LOWDELAY};
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encoder = opus_encoder_create(sampleRate, channel_num, applications[1], &err);
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if (err != OPUS_OK || encoder == NULL) {
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printf("打开opus 编码器失败\n");
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}
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opus_encoder_ctl(encoder, OPUS_SET_VBR(0)); // 0:CBR, 1:VBR
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opus_encoder_ctl(encoder, OPUS_SET_VBR_CONSTRAINT(true));
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opus_encoder_ctl(encoder, OPUS_SET_BITRATE(sample_rate * channel_num));
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opus_encoder_ctl(encoder, OPUS_SET_COMPLEXITY(8)); // 8 0~10
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opus_encoder_ctl(encoder, OPUS_SET_SIGNAL(OPUS_SIGNAL_VOICE));
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opus_encoder_ctl(encoder,
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OPUS_SET_LSB_DEPTH(16)); // 每个采样16个bit，2个byte
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opus_encoder_ctl(encoder, OPUS_SET_DTX(0));
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opus_encoder_ctl(encoder, OPUS_SET_INBAND_FEC(0));
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EncodeRun();
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}
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// every pcm frame takes 23ms
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void OpusEncoderImpl::Feed(unsigned char *data, int len) {
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mutex.lock();
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for (auto i = 0; i < len; i++) {
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pcm_queue.emplace(data[i]);
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}
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mutex.unlock();
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}
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bool OpusEncoderImpl::PopFrame(StreamInfo &info) {
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if (info_queue.size() > 0) {
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access_mutex.lock();
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info = info_queue.front();
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info_queue.pop();
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access_mutex.unlock();
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return true;
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}
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return false;
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}
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// 48000 sample rate，48 samples/ms * 20ms * 2 channel = 1920
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void OpusEncoderImpl::EncodeRun() {
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m_thread = std::thread([this]() {
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const int frame_size = 48 * 20; // 1920
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int input_len = sizeof(opus_int16) * frame_size * channel_num;
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OpusDecoderImpl decoder(sample_rate, channel_num);
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opus_int16 input_data[frame_size] = {0};
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unsigned char *input_buffer = new unsigned char[input_len];
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unsigned char out_data[MAX_PACKET_SIZE] = {0};
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while (isRuning) {
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if (pcm_queue.size() >= input_len) {
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mutex.lock();
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for (int i = 0; i < input_len; i++) {
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input_buffer[i] = pcm_queue.front();
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pcm_queue.pop();
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}
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mutex.unlock();
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auto ret = opus_encode(encoder, (opus_int16 *)input_buffer, frame_size,
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out_data, MAX_PACKET_SIZE);
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if (ret < 0) {
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printf("opus decode failed, %d\n", ret);
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break;
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}
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unsigned char *opus_buffer = (unsigned char *)malloc(ret);
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memcpy(opus_buffer, out_data, ret);
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decoder.Decode(opus_buffer, ret);
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StreamInfo info;
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info.data = opus_buffer;
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info.len = ret;
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info.dts = 20;
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access_mutex.lock();
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info_queue.push(info);
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access_mutex.unlock();
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} else {
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std::this_thread::sleep_for(std::chrono::milliseconds(1));
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}
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}
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free(input_buffer);
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});
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}
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void OpusEncoderImpl::Stop() {
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isRuning = false;
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m_thread->join();
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while (pcm_queue.size() > 0) {
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pcm_queue.pop();
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}
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opus_encoder_destroy(encoder);
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}
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OpusEncoderImpl::~OpusEncoderImpl() {} |