support all sample rate in aac

trunk/src/protocol/srs_raw_avc.cpp

@@ -438,7 +438,8 @@ srs_error_t SrsRawAacStream::adts_demux(SrsBuffer* stream, char** pframe, int* p
 srs_error_t SrsRawAacStream::mux_sequence_header(SrsRawAacStreamCodec* codec, string& sh)
 {
     srs_error_t err = srs_success;
-    
+    char samplingFrequencyIndex = codec->sampling_frequency_index;
+
     // only support aac profile 1-4.
     if (codec->aac_object == SrsAacObjectTypeReserved) {
         return srs_error_new(ERROR_AAC_DATA_INVALID, "invalid aac object");
@@ -446,21 +447,11 @@ srs_error_t SrsRawAacStream::mux_sequence_header(SrsRawAacStreamCodec* codec, st
     
     SrsAacObjectType audioObjectType = codec->aac_object;
     char channelConfiguration = codec->channel_configuration;
-    char samplingFrequencyIndex = codec->sampling_frequency_index;
     
-    // override the aac samplerate by user specified.
-    // @see https://github.com/ossrs/srs/issues/212#issuecomment-64146899
-    switch (codec->sound_rate) {
-        case SrsAudioSampleRate11025:
-            samplingFrequencyIndex = 0x0a; break;
-        case SrsAudioSampleRate22050:
-            samplingFrequencyIndex = 0x07; break;
-        case SrsAudioSampleRate44100:
-            samplingFrequencyIndex = 0x04; break;
-        default:
-            break;
+    if (samplingFrequencyIndex >= 16) {
+        samplingFrequencyIndex = 4;//default 44100
     }
-    
+
     char chs[2];
     // @see ISO_IEC_14496-3-AAC-2001.pdf
     // AudioSpecificConfig (), page 33

trunk/src/protocol/srs_raw_avc.hpp

@@ -30,6 +30,11 @@
 
 #include <srs_kernel_codec.hpp>
 
+static const int mpeg4audio_sample_rates[16] = {
+    96000, 88200, 64000, 48000, 44100, 32000,
+    24000, 22050, 16000, 12000, 11025, 8000, 7350
+};
+
 class SrsBuffer;
 
 // The raw h.264 stream, in annexb.