1 files changed, 4 insertions, 120 deletions
diff --git a/voip/jni/rtp/AudioCodec.cpp b/voip/jni/rtp/AudioCodec.cpp
index 4d8d36c..fc33ef2 100644
--- a/voip/jni/rtp/AudioCodec.cpp
+++ b/voip/jni/rtp/AudioCodec.cpp
@@ -18,124 +18,9 @@
 
 #include "AudioCodec.h"
 
-namespace {
-
-int8_t gExponents[128] = {
-    0, 1, 2, 2, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4, 4, 4,
-    5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,
-    6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6,
-    6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6,
-    7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7,
-    7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7,
-    7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7,
-    7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7,
-};
-
-//------------------------------------------------------------------------------
-
-class UlawCodec : public AudioCodec
-{
-public:
-    int set(int sampleRate, const char *fmtp) {
-        mSampleCount = sampleRate / 50;
-        return mSampleCount;
-    }
-    int encode(void *payload, int16_t *samples);
-    int decode(int16_t *samples, void *payload, int length);
-private:
-    int mSampleCount;
-};
-
-int UlawCodec::encode(void *payload, int16_t *samples)
-{
-    int8_t *ulaws = (int8_t *)payload;
-    for (int i = 0; i < mSampleCount; ++i) {
-        int sample = samples[i];
-        int sign = (sample >> 8) & 0x80;
-        if (sample < 0) {
-            sample = -sample;
-        }
-        sample += 132;
-        if (sample > 32767) {
-            sample = 32767;
-        }
-        int exponent = gExponents[sample >> 8];
-        int mantissa = (sample >> (exponent + 3)) & 0x0F;
-        ulaws[i] = ~(sign | (exponent << 4) | mantissa);
-    }
-    return mSampleCount;
-}
-
-int UlawCodec::decode(int16_t *samples, void *payload, int length)
-{
-    int8_t *ulaws = (int8_t *)payload;
-    for (int i = 0; i < length; ++i) {
-        int ulaw = ~ulaws[i];
-        int exponent = (ulaw >> 4) & 0x07;
-        int mantissa = ulaw & 0x0F;
-        int sample = (((mantissa << 3) + 132) << exponent) - 132;
-        samples[i] = (ulaw < 0 ? -sample : sample);
-    }
-    return length;
-}
-
-AudioCodec *newUlawCodec()
-{
-    return new UlawCodec;
-}
-
-//------------------------------------------------------------------------------
-
-class AlawCodec : public AudioCodec
-{
-public:
-    int set(int sampleRate, const char *fmtp) {
-        mSampleCount = sampleRate / 50;
-        return mSampleCount;
-    }
-    int encode(void *payload, int16_t *samples);
-    int decode(int16_t *samples, void *payload, int length);
-private:
-    int mSampleCount;
-};
-
-int AlawCodec::encode(void *payload, int16_t *samples)
-{
-    int8_t *alaws = (int8_t *)payload;
-    for (int i = 0; i < mSampleCount; ++i) {
-        int sample = samples[i];
-        int sign = (sample >> 8) & 0x80;
-        if (sample < 0) {
-            sample = -sample;
-        }
-        if (sample > 32767) {
-            sample = 32767;
-        }
-        int exponent = gExponents[sample >> 8];
-        int mantissa = (sample >> (exponent == 0 ? 4 : exponent + 3)) & 0x0F;
-        alaws[i] = (sign | (exponent << 4) | mantissa) ^ 0xD5;
-    }
-    return mSampleCount;
-}
-
-int AlawCodec::decode(int16_t *samples, void *payload, int length)
-{
-    int8_t *alaws = (int8_t *)payload;
-    for (int i = 0; i < length; ++i) {
-        int alaw = alaws[i] ^ 0x55;
-        int exponent = (alaw >> 4) & 0x07;
-        int mantissa = alaw & 0x0F;
-        int sample = (exponent == 0 ? (mantissa << 4) + 8 :
-            ((mantissa << 3) + 132) << exponent);
-        samples[i] = (alaw < 0 ? sample : -sample);
-    }
-    return length;
-}
-
-AudioCodec *newAlawCodec()
-{
-    return new AlawCodec;
-}
+extern AudioCodec *newAlawCodec();
+extern AudioCodec *newUlawCodec();
+extern AudioCodec *newGsmCodec();
 
 struct AudioCodecType {
     const char *name;
@@ -143,11 +28,10 @@ struct AudioCodecType {
 } gAudioCodecTypes[] = {
     {"PCMA", newAlawCodec},
     {"PCMU", newUlawCodec},
+    {"GSM", newGsmCodec},
     {NULL, NULL},
 };
 
-} // namespace
-
 AudioCodec *newAudioCodec(const char *codecName)
 {
     AudioCodecType *type = gAudioCodecTypes;