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T2: realtime capture tail trimming

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Auto/Manual/Off tail handling for realtime track-tap capture. Auto scans
recorded PCM backward for last frame above -72 dB and truncates the wav
header-aware (8 s cap); Manual pads a fixed tail; Off is byte-identical.
wav_trim rejects WAVE_FORMAT_EXTENSIBLE with non-float SubFormat GUID.
This commit is contained in:
Daniel Harvey
2026-07-23 18:25:45 -04:00
parent 81fa37fe94
commit f2bfe466ec
12 changed files with 1053 additions and 10 deletions
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CMakeLists.txt
+19 -1
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@@ -120,6 +120,20 @@ add_library(realtime_record STATIC src/realtime_record.cpp)
target_include_directories(realtime_record PUBLIC src)
target_link_libraries(realtime_record PUBLIC bank_model)
# ---------------------------------------------------------------------------
# 2h) Pure wav_trim library — NO REAPER, NO SWELL. The realtime tail's (T2) PCM
# decay-scan trim needs to TRUNCATE the recorded 32-bit-float WAV at a frame
# boundary without corrupting the RIFF container. This module holds the fiddly,
# easy-to-get-wrong part unit-tested outside the DAW: parse the WAV geometry
# (fmt/data chunk walk + 32-bit-float verification), extract the tail-region
# floats to scan, and compute the truncate plan (kept byte length + the two
# patched RIFF/data size fields). The file read/write/truncate I/O stays in the
# realtime shell. Depends on peaks for the AudioSample float alias.
# ---------------------------------------------------------------------------
add_library(wav_trim STATIC src/wav_trim.cpp)
target_include_directories(wav_trim PUBLIC src)
target_link_libraries(wav_trim PUBLIC peaks)
# ---------------------------------------------------------------------------
# 3) Standalone tests for the pure modules (run without launching REAPER).
# ---------------------------------------------------------------------------
@@ -168,6 +182,10 @@ add_executable(realtime_record_tests tests/test_realtime_record.cpp)
target_link_libraries(realtime_record_tests PRIVATE realtime_record)
add_test(NAME realtime_record_tests COMMAND realtime_record_tests)
add_executable(wav_trim_tests tests/test_wav_trim.cpp)
target_link_libraries(wav_trim_tests PRIVATE wav_trim)
add_test(NAME wav_trim_tests COMMAND wav_trim_tests)
# ---------------------------------------------------------------------------
# 4) The REAPER extension — a loadable module (dlopen'd by REAPER, not linked).
# ---------------------------------------------------------------------------
@@ -199,7 +217,7 @@ add_library(reaper_reasampler MODULE
src/track_guid.cpp
src/actions.cpp
)
target_link_libraries(reaper_reasampler PRIVATE bank_model capture_paths peaks bank_grid mode_switch view_mode_model insert_plan render_settings tail_control realtime_record)
target_link_libraries(reaper_reasampler PRIVATE bank_model capture_paths peaks bank_grid mode_switch view_mode_model insert_plan render_settings tail_control realtime_record wav_trim)
target_include_directories(reaper_reasampler PRIVATE ${SDK_INC} ${WDL_INC})
set_target_properties(reaper_reasampler PROPERTIES PREFIX "" OUTPUT_NAME "reaper_reasampler")