This CL is to add Opus complexity knob and to test it.

As a by-product, a generic tool for testing and comparing the complexity of codecs is added, and new audio files are added to the resources.

Three complexity tests are included
1. Default Opus complexity
2. Opus complexity knob
3. Default iSAC complexity (to compare with Opus)

The complexity tests are only meant for development reasons
and not to be run at bots.

The .isolate file is only needed for the APK packaging and test execution on Android.

TEST=passes all trybots

BUG=
R=kjellander@webrtc.org, tina.legrand@webrtc.org, turaj@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/8969004

git-svn-id: http://webrtc.googlecode.com/svn/trunk@5655 4adac7df-926f-26a2-2b94-8c16560cd09d

webrtc/modules/audio_coding/codecs/opus/interface/opus_interface.h

@@ -11,7 +11,7 @@
 #ifndef WEBRTC_MODULES_AUDIO_CODING_CODECS_OPUS_INTERFACE_OPUS_INTERFACE_H_
 #define WEBRTC_MODULES_AUDIO_CODING_CODECS_OPUS_INTERFACE_OPUS_INTERFACE_H_
 
-#include "typedefs.h"
+#include "webrtc/typedefs.h"
 
 #ifdef __cplusplus
 extern "C" {
@@ -59,6 +59,21 @@ int16_t WebRtcOpus_Encode(OpusEncInst* inst, int16_t* audio_in, int16_t samples,
  */
 int16_t WebRtcOpus_SetBitRate(OpusEncInst* inst, int32_t rate);
 
+/****************************************************************************
+ * WebRtcOpus_SetComplexity(...)
+ *
+ * This function adjusts the computational complexity. The effect is the same as
+ * calling the complexity setting of Opus as an Opus encoder related CTL.
+ *
+ * Input:
+ *      - inst               : Encoder context
+ *      - complexity         : New target complexity (0-10, inclusive)
+ *
+ * Return value              :  0 - Success
+ *                             -1 - Error
+ */
+int16_t WebRtcOpus_SetComplexity(OpusEncInst* inst, int32_t complexity);
+
 int16_t WebRtcOpus_DecoderCreate(OpusDecInst** inst, int channels);
 int16_t WebRtcOpus_DecoderFree(OpusDecInst* inst);