diff options
Diffstat (limited to 'modules/audio_processing/test/test_utils.h')
| -rw-r--r-- | modules/audio_processing/test/test_utils.h | 29 |
1 files changed, 26 insertions, 3 deletions
diff --git a/modules/audio_processing/test/test_utils.h b/modules/audio_processing/test/test_utils.h index 61edd8f3..d0d08cb8 100644 --- a/modules/audio_processing/test/test_utils.h +++ b/modules/audio_processing/test/test_utils.h @@ -8,11 +8,12 @@ * be found in the AUTHORS file in the root of the source tree. */ +#include <math.h> #include <limits> #include "webrtc/audio_processing/debug.pb.h" #include "webrtc/common_audio/include/audio_util.h" -#include "webrtc/common_audio/wav_writer.h" +#include "webrtc/common_audio/wav_file.h" #include "webrtc/modules/audio_processing/common.h" #include "webrtc/modules/audio_processing/include/audio_processing.h" #include "webrtc/modules/interface/module_common_types.h" @@ -49,7 +50,7 @@ class RawFile { static inline void WriteIntData(const int16_t* data, size_t length, - WavFile* wav_file, + WavWriter* wav_file, RawFile* raw_file) { if (wav_file) { wav_file->WriteSamples(data, length); @@ -62,7 +63,7 @@ static inline void WriteIntData(const int16_t* data, static inline void WriteFloatData(const float* const* data, size_t samples_per_channel, int num_channels, - WavFile* wav_file, + WavWriter* wav_file, RawFile* raw_file) { size_t length = num_channels * samples_per_channel; scoped_ptr<float[]> buffer(new float[length]); @@ -153,4 +154,26 @@ static inline bool ReadMessageFromFile(FILE* file, return msg->ParseFromArray(bytes.get(), size); } +template <typename T> +float ComputeSNR(const T* ref, const T* test, int length, float* variance) { + float mse = 0; + float mean = 0; + *variance = 0; + for (int i = 0; i < length; ++i) { + T error = ref[i] - test[i]; + mse += error * error; + *variance += ref[i] * ref[i]; + mean += ref[i]; + } + mse /= length; + *variance /= length; + mean /= length; + *variance -= mean * mean; + + float snr = 100; // We assign 100 dB to the zero-error case. + if (mse > 0) + snr = 10 * log10(*variance / mse); + return snr; +} + } // namespace webrtc |