diff --git a/3rd-party/bluedroid/decoder/srce/alloc.c b/3rd-party/bluedroid/decoder/srce/alloc.c
index f8723f21a..b224217e0 100644
--- a/3rd-party/bluedroid/decoder/srce/alloc.c
+++ b/3rd-party/bluedroid/decoder/srce/alloc.c
@@ -24,6 +24,11 @@
   $Revision: #1 $
 ***********************************************************************************/
 
+PRIVATE OI_STATUS OI_CODEC_SBC_Alloc(OI_CODEC_SBC_COMMON_CONTEXT *common,
+                                     OI_UINT32 *codecDataAligned,
+                                     OI_UINT32 codecDataBytes,
+                                     OI_UINT8 maxChannels,
+                                     OI_UINT8 pcmStride);
 PRIVATE OI_STATUS OI_CODEC_SBC_Alloc(OI_CODEC_SBC_COMMON_CONTEXT *common,
                                      OI_UINT32 *codecDataAligned,
                                      OI_UINT32 codecDataBytes,
diff --git a/3rd-party/bluedroid/decoder/srce/bitalloc-sbc.c b/3rd-party/bluedroid/decoder/srce/bitalloc-sbc.c
index 8120298d0..51282ad3b 100644
--- a/3rd-party/bluedroid/decoder/srce/bitalloc-sbc.c
+++ b/3rd-party/bluedroid/decoder/srce/bitalloc-sbc.c
@@ -95,7 +95,6 @@ static const BIT_ALLOC balloc[] = {
     stereoBitAllocation   /* SBC_JOINT_STEREO */
 };
 
-
 PRIVATE void OI_SBC_ComputeBitAllocation(OI_CODEC_SBC_COMMON_CONTEXT *common)
 {
     OI_ASSERT(common->frameInfo.bitpool <= OI_SBC_MaxBitpool(&common->frameInfo));
@@ -116,6 +115,7 @@ OI_UINT32 OI_CODEC_SBC_CalculateBitrate(OI_CODEC_SBC_FRAME_INFO *frame)
 /*
  * Return the current maximum bitneed and clear it.
  */
+#if 0
 OI_UINT8 OI_CODEC_SBC_GetMaxBitneed(OI_CODEC_SBC_COMMON_CONTEXT *common)
 {
     OI_UINT8 max = common->maxBitneed;
@@ -123,7 +123,7 @@ OI_UINT8 OI_CODEC_SBC_GetMaxBitneed(OI_CODEC_SBC_COMMON_CONTEXT *common)
     common->maxBitneed = 0;
     return max;
 }
-
+#endif
 /*
  * Calculates the bitpool size for a given frame length
  */
diff --git a/3rd-party/bluedroid/decoder/srce/bitalloc.c b/3rd-party/bluedroid/decoder/srce/bitalloc.c
index 544c470d1..f18ddda82 100644
--- a/3rd-party/bluedroid/decoder/srce/bitalloc.c
+++ b/3rd-party/bluedroid/decoder/srce/bitalloc.c
@@ -56,6 +56,7 @@ OI_UINT32 OI_SBC_MaxBitpool(OI_CODEC_SBC_FRAME_INFO *frame)
 }
 
 
+PRIVATE OI_UINT16 internal_CalculateFramelen(OI_CODEC_SBC_FRAME_INFO *frame);
 PRIVATE OI_UINT16 internal_CalculateFramelen(OI_CODEC_SBC_FRAME_INFO *frame)
 {
     OI_UINT16 nbits = frame->nrof_blocks * frame->bitpool;
@@ -72,6 +73,7 @@ PRIVATE OI_UINT16 internal_CalculateFramelen(OI_CODEC_SBC_FRAME_INFO *frame)
 }
 
 
+PRIVATE OI_UINT32 internal_CalculateBitrate(OI_CODEC_SBC_FRAME_INFO *frame);
 PRIVATE OI_UINT32 internal_CalculateBitrate(OI_CODEC_SBC_FRAME_INFO *frame)
 {
     OI_UINT blocksbands;
diff --git a/3rd-party/bluedroid/decoder/srce/decoder-sbc.c b/3rd-party/bluedroid/decoder/srce/decoder-sbc.c
index 18afa1746..cd30abccd 100644
--- a/3rd-party/bluedroid/decoder/srce/decoder-sbc.c
+++ b/3rd-party/bluedroid/decoder/srce/decoder-sbc.c
@@ -38,6 +38,9 @@
  * set for enhanced operation using OI_CODEC_SBC_DecoderReset(), it will search
  * for both a standard and an enhanced syncword.
  */
+PRIVATE OI_STATUS FindSyncword(OI_CODEC_SBC_DECODER_CONTEXT *context,
+                               const OI_BYTE **frameData,
+                               OI_UINT32 *frameBytes);
 PRIVATE OI_STATUS FindSyncword(OI_CODEC_SBC_DECODER_CONTEXT *context,
                                const OI_BYTE **frameData,
                                OI_UINT32 *frameBytes)
@@ -445,6 +448,7 @@ OI_UINT8 OI_CODEC_SBC_FrameCount(OI_BYTE  *frameData,
 
 #ifdef SPECIALIZE_READ_SAMPLES_JOINT
 
+PRIVATE void OI_SBC_ReadSamplesJoint4(OI_CODEC_SBC_DECODER_CONTEXT *context, OI_BITSTREAM *global_bs);
 PRIVATE void OI_SBC_ReadSamplesJoint4(OI_CODEC_SBC_DECODER_CONTEXT *context, OI_BITSTREAM *global_bs)
 {
 #define NROF_SUBBANDS 4
@@ -452,6 +456,7 @@ PRIVATE void OI_SBC_ReadSamplesJoint4(OI_CODEC_SBC_DECODER_CONTEXT *context, OI_
 #undef NROF_SUBBANDS
 }
 
+PRIVATE void OI_SBC_ReadSamplesJoint8(OI_CODEC_SBC_DECODER_CONTEXT *context, OI_BITSTREAM *global_bs);
 PRIVATE void OI_SBC_ReadSamplesJoint8(OI_CODEC_SBC_DECODER_CONTEXT *context, OI_BITSTREAM *global_bs)
 {
 #define NROF_SUBBANDS 8
diff --git a/3rd-party/bluedroid/decoder/srce/dequant.c b/3rd-party/bluedroid/decoder/srce/dequant.c
index 859173292..5c81101ab 100644
--- a/3rd-party/bluedroid/decoder/srce/dequant.c
+++ b/3rd-party/bluedroid/decoder/srce/dequant.c
@@ -180,6 +180,7 @@ INLINE OI_INT32 OI_SBC_Dequant(OI_UINT32 raw, OI_UINT scale_factor, OI_UINT bits
  * the encoder is conformant) the result will fit a 24 bit fixed point signed
  * value.*/
 
+INLINE OI_INT32 OI_SBC_Dequant_Unscaled(OI_UINT32 raw, OI_UINT scale_factor, OI_UINT bits);
 INLINE OI_INT32 OI_SBC_Dequant_Unscaled(OI_UINT32 raw, OI_UINT scale_factor, OI_UINT bits)
 {
     OI_UINT32 d;
diff --git a/3rd-party/bluedroid/decoder/srce/framing.c b/3rd-party/bluedroid/decoder/srce/framing.c
index ea61f847a..1448bd0f6 100644
--- a/3rd-party/bluedroid/decoder/srce/framing.c
+++ b/3rd-party/bluedroid/decoder/srce/framing.c
@@ -108,6 +108,7 @@ const OI_UINT32 dequant_long_unscaled[17] = {
 #endif
 
 #ifdef USE_WIDE_CRC
+INLINE OI_CHAR crc_iterate(OI_UINT8 oldcrc, OI_UINT8 next);
 INLINE OI_CHAR crc_iterate(OI_UINT8 oldcrc, OI_UINT8 next)
 {
     OI_UINT crc;
@@ -123,6 +124,7 @@ INLINE OI_CHAR crc_iterate(OI_UINT8 oldcrc, OI_UINT8 next)
     return crc;
 }
 
+INLINE OI_CHAR crc_iterate_top4(OI_UINT8 oldcrc, OI_UINT8 next);
 INLINE OI_CHAR crc_iterate_top4(OI_UINT8 oldcrc, OI_UINT8 next)
 {
     OI_UINT crc;
@@ -140,12 +142,14 @@ INLINE OI_CHAR crc_iterate_top4(OI_UINT8 oldcrc, OI_UINT8 next)
 
 #else // USE_WIDE_CRC
 
+INLINE OI_UINT8 crc_iterate_top4(OI_UINT8 oldcrc, OI_UINT8 next);
 INLINE OI_UINT8 crc_iterate_top4(OI_UINT8 oldcrc, OI_UINT8 next)
 {
     return (oldcrc << 4) ^ crc8_narrow[(oldcrc^next) >> 4];
 }
 
 #ifdef USE_NIBBLEWISE_CRC
+INLINE OI_UINT8 crc_iterate(OI_UINT8 crc, OI_UINT8 next);
 INLINE OI_UINT8 crc_iterate(OI_UINT8 crc, OI_UINT8 next)
 {
     crc = (crc << 4) ^ crc8_narrow[(crc^next) >> 4];
@@ -155,6 +159,7 @@ INLINE OI_UINT8 crc_iterate(OI_UINT8 crc, OI_UINT8 next)
 }
 
 #else   // USE_NIBBLEWISE_CRC
+INLINE OI_UINT8 crc_iterate(OI_UINT8 crc, OI_UINT8 next);
 INLINE OI_UINT8 crc_iterate(OI_UINT8 crc, OI_UINT8 next)
 {
   return crc8_narrow[crc^next];
diff --git a/3rd-party/bluedroid/decoder/srce/synthesis-8-generated.c b/3rd-party/bluedroid/decoder/srce/synthesis-8-generated.c
index c33498e27..f5e22b155 100644
--- a/3rd-party/bluedroid/decoder/srce/synthesis-8-generated.c
+++ b/3rd-party/bluedroid/decoder/srce/synthesis-8-generated.c
@@ -39,6 +39,7 @@
 
 #define MUL_16S_16S(_x, _y) ((_x) * (_y))
 
+PRIVATE void SynthWindow80_generated(OI_INT16 *pcm, SBC_BUFFER_T const * RESTRICT buffer, OI_UINT strideShift);
 PRIVATE void SynthWindow80_generated(OI_INT16 *pcm, SBC_BUFFER_T const * RESTRICT buffer, OI_UINT strideShift)
 {
     OI_INT32 pcm_a, pcm_b;
diff --git a/3rd-party/bluedroid/decoder/srce/synthesis-dct8.c b/3rd-party/bluedroid/decoder/srce/synthesis-dct8.c
index 428075845..ecc287ad8 100644
--- a/3rd-party/bluedroid/decoder/srce/synthesis-dct8.c
+++ b/3rd-party/bluedroid/decoder/srce/synthesis-dct8.c
@@ -60,6 +60,7 @@
  * @return  A signed 32-bit value corresponding to the 32 most significant bits
  * of the 64-bit product of u and v.
  */
+INLINE OI_INT32 default_mul_32s_32s_hi(OI_INT32 u, OI_INT32 v);
 INLINE OI_INT32 default_mul_32s_32s_hi(OI_INT32 u, OI_INT32 v)
 {
     OI_UINT32 u0, v0;
@@ -206,6 +207,7 @@ PRIVATE void float_dct2_8(float * RESTRICT out, OI_INT32 const *RESTRICT in)
  * [ 0  0  0  0  0  0  1  2 ]
  *
  */
+PRIVATE void dct2_8(SBC_BUFFER_T * RESTRICT out, OI_INT32 const *RESTRICT in);
 PRIVATE void dct2_8(SBC_BUFFER_T * RESTRICT out, OI_INT32 const *RESTRICT in)
 {
 #define BUTTERFLY(x,y) x += y; y = x - (y<<1);
diff --git a/3rd-party/bluedroid/decoder/srce/synthesis-sbc.c b/3rd-party/bluedroid/decoder/srce/synthesis-sbc.c
index 38c6f17e9..134e1c7ad 100644
--- a/3rd-party/bluedroid/decoder/srce/synthesis-sbc.c
+++ b/3rd-party/bluedroid/decoder/srce/synthesis-sbc.c
@@ -213,6 +213,7 @@ const OI_INT32 dec_window_4[21] = {
  * @return  A signed 32-bit value corresponding to the 32 most significant bits
  * of the 48-bit product of u and v.
  */
+INLINE OI_INT32 default_mul_16s_32s_hi(OI_INT16 u, OI_INT32 v);
 INLINE OI_INT32 default_mul_16s_32s_hi(OI_INT16 u, OI_INT32 v)
 {
     OI_UINT16 v0;
@@ -255,6 +256,7 @@ typedef void (*SYNTH_FRAME)(OI_CODEC_SBC_DECODER_CONTEXT *context, OI_INT16 *pcm
 #define SYNTH112 SynthWindow112_generated
 #endif
 
+PRIVATE void OI_SBC_SynthFrame_80(OI_CODEC_SBC_DECODER_CONTEXT *context, OI_INT16 *pcm, OI_UINT blkstart, OI_UINT blkcount);
 PRIVATE void OI_SBC_SynthFrame_80(OI_CODEC_SBC_DECODER_CONTEXT *context, OI_INT16 *pcm, OI_UINT blkstart, OI_UINT blkcount)
 {
     OI_UINT blk;
@@ -286,6 +288,7 @@ PRIVATE void OI_SBC_SynthFrame_80(OI_CODEC_SBC_DECODER_CONTEXT *context, OI_INT1
     context->common.filterBufferOffset = offset;
 }
 
+PRIVATE void OI_SBC_SynthFrame_4SB(OI_CODEC_SBC_DECODER_CONTEXT *context, OI_INT16 *pcm, OI_UINT blkstart, OI_UINT blkcount);
 PRIVATE void OI_SBC_SynthFrame_4SB(OI_CODEC_SBC_DECODER_CONTEXT *context, OI_INT16 *pcm, OI_UINT blkstart, OI_UINT blkcount)
 {
     OI_UINT blk;