AacTracker 增加构造函数

src/Extension/AAC.cpp

@@ -18,8 +18,8 @@ using namespace toolkit;
 
 namespace mediakit{
 
-#ifndef ENABLE_MP4
 unsigned const samplingFrequencyTable[16] = { 96000, 88200, 64000, 48000, 44100, 32000, 24000, 22050, 16000, 12000, 11025, 8000, 7350, 0, 0, 0 };
+#ifndef ENABLE_MP4
 
 class AdtsHeader{
 public:
@@ -246,6 +246,22 @@ AACTrack::AACTrack(const string &aac_cfg) {
     onReady();
 }
 
+AACTrack::AACTrack(int samplerate, int channel, int profile) : _channel(channel), _sampleRate(samplerate) {
+    uint8_t audioSpecificConfig[2] = { 0 };
+    uint8_t audioObjectType = profile+1;
+    int samplingFrequencyIndex = 0;
+    for (size_t i = 0; i < sizeof(samplingFrequencyTable) / sizeof(samplingFrequencyTable[0]); i++) {
+        if (samplingFrequencyTable[i] == (unsigned)samplerate) {
+            samplingFrequencyIndex = i;
+            break;
+        }
+    }
+    _cfg.resize(2);
+    _cfg[0] = (audioObjectType << 3) | (samplingFrequencyIndex >> 1);
+    _cfg[1] = (samplingFrequencyIndex << 7) | (channel << 3);
+    // onReady();
+}
+
 const string &AACTrack::getConfig() const {
     return _cfg;
 }

src/Extension/AAC.h

@@ -40,6 +40,7 @@ public:
      * @param aac_cfg aac配置信息
      */
     AACTrack(const std::string &aac_cfg);
+    AACTrack(int samplerate, int channel, int profile=1);
 
     /**
      * 获取aac 配置信息

src/Extension/G711.h

@@ -22,7 +22,7 @@ namespace mediakit{
 class G711Track : public AudioTrackImp{
 public:
     using Ptr = std::shared_ptr<G711Track>;
-    G711Track(CodecId codecId, int sample_rate, int channels, int sample_bit) : AudioTrackImp(codecId, 8000, 1, 16) {}
+    G711Track(CodecId codecId, int sample_rate = 8000, int channels = 1, int sample_bit = 16) : AudioTrackImp(codecId, sample_rate, channels, sample_bit) {}
 
 private:
     Sdp::Ptr getSdp() override;