X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=nageru%2Faudio_mixer.cpp;h=891fb227c779f4917201345718b242bc3f71fd39;hb=c2e00354a67bb858582d05ac7a7cce19ee21d29b;hp=7bb1ddd8e4cb9b1a3d02deeca9c401e115660373;hpb=131a051c4cd3719a9be415386fdf0f4e15da7c66;p=nageru

diff --git a/nageru/audio_mixer.cpp b/nageru/audio_mixer.cpp
index 7bb1ddd..891fb22 100644
--- a/nageru/audio_mixer.cpp
+++ b/nageru/audio_mixer.cpp
@@ -18,7 +18,7 @@
 #include <limits>
 #include <utility>
 
-#include "db.h"
+#include "decibel.h"
 #include "flags.h"
 #include "shared/metrics.h"
 #include "state.pb.h"
@@ -65,8 +65,8 @@ void convert_fixed24_to_fp32(float *dst, size_t out_channel, size_t out_num_chan
 		uint32_t s1 = src[0];
 		uint32_t s2 = src[1];
 		uint32_t s3 = src[2];
-		uint32_t s = s1 | (s1 << 8) | (s2 << 16) | (s3 << 24);
-		*dst = int(s) * (1.0f / 2147483648.0f);
+		uint32_t s = (s1 << 8) | (s2 << 16) | (s3 << 24);  // Note: The bottom eight bits are zero; s3 includes the sign bit.
+		*dst = int(s) * (1.0f / (256.0f * 8388608.0f));  // 256 for signed down-shift by 8, then 2^23 for the actual conversion.
 
 		src += 3 * in_num_channels;
 		dst += out_num_channels;
@@ -244,7 +244,7 @@ void AudioMixer::reset_resampler_mutex_held(DeviceSpec device_spec)
 	}
 }
 
-bool AudioMixer::add_audio(DeviceSpec device_spec, const uint8_t *data, unsigned num_samples, AudioFormat audio_format, int64_t frame_length, steady_clock::time_point frame_time)
+bool AudioMixer::add_audio(DeviceSpec device_spec, const uint8_t *data, unsigned num_samples, AudioFormat audio_format, steady_clock::time_point frame_time)
 {
 	AudioDevice *device = find_audio_device(device_spec);
 
@@ -294,7 +294,7 @@ bool AudioMixer::add_audio(DeviceSpec device_spec, const uint8_t *data, unsigned
 	return true;
 }
 
-bool AudioMixer::add_silence(DeviceSpec device_spec, unsigned samples_per_frame, unsigned num_frames, int64_t frame_length)
+bool AudioMixer::add_silence(DeviceSpec device_spec, unsigned samples_per_frame, unsigned num_frames)
 {
 	AudioDevice *device = find_audio_device(device_spec);