X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=nageru%2Faudio_mixer.h;h=14e7e85d098065aabc5cd39d70ed5b31a8713041;hb=efeea7571ab45c6a846208f0554153de549d1711;hp=e435b46280c0d28e549c2fb36ae3df40f810f640;hpb=b44bf7cfce6a5aaffbcd1e37df39068a163438ad;p=nageru

diff --git a/nageru/audio_mixer.h b/nageru/audio_mixer.h
index e435b46..14e7e85 100644
--- a/nageru/audio_mixer.h
+++ b/nageru/audio_mixer.h
@@ -37,6 +37,10 @@ namespace bmusb {
 struct AudioFormat;
 }  // namespace bmusb
 
+// Convert the given audio from {16,24,32}-bit M-channel to 32-bit N-channel PCM.
+// Assumes little-endian and chunky, signed PCM throughout.
+std::vector<int32_t> convert_audio_to_fixed32(const uint8_t *data, unsigned num_samples, bmusb::AudioFormat audio_format, unsigned num_destination_channels);
+
 enum EQBand {
 	EQ_BAND_BASS = 0,
 	EQ_BAND_MID,
@@ -54,9 +58,9 @@ public:
 	// the lock wasn't successfully taken; if so, you should simply try again.
 	// (This is to avoid a deadlock where a card hangs on the mutex in add_audio()
 	// while we are trying to shut it down from another thread that also holds
-	// the mutex.) frame_length is in TIMEBASE units.
-	bool add_audio(DeviceSpec device_spec, const uint8_t *data, unsigned num_samples, bmusb::AudioFormat audio_format, int64_t frame_length, std::chrono::steady_clock::time_point frame_time);
-	bool add_silence(DeviceSpec device_spec, unsigned samples_per_frame, unsigned num_frames, int64_t frame_length);
+	// the mutex.)
+	bool add_audio(DeviceSpec device_spec, const uint8_t *data, unsigned num_samples, bmusb::AudioFormat audio_format, std::chrono::steady_clock::time_point frame_time);
+	bool add_silence(DeviceSpec device_spec, unsigned samples_per_frame, unsigned num_frames);
 
 	// If a given device is offline for whatever reason and cannot deliver audio
 	// (by means of add_audio() or add_silence()), you can call put it in silence mode,