diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/audio/wav_dump_backend.cc | 21 |
1 files changed, 12 insertions, 9 deletions
diff --git a/src/audio/wav_dump_backend.cc b/src/audio/wav_dump_backend.cc index f5ea9d7..bcf43c0 100644 --- a/src/audio/wav_dump_backend.cc +++ b/src/audio/wav_dump_backend.cc @@ -48,7 +48,8 @@ void WavDumpBackend::start() { // This matches the seek logic in main.cc const int max_duration_sec = 60; const float update_dt = 1.0f / 60.0f; // 60Hz update rate (matches main loop) - const int samples_per_update = (int)(kSampleRate * update_dt); // ~533 samples + const int frames_per_update = (int)(kSampleRate * update_dt); // ~533 frames + const int samples_per_update = frames_per_update * 2; // Stereo: 2 samples per frame const int total_updates = (int)(max_duration_sec / update_dt); // Music time tracking @@ -56,7 +57,7 @@ void WavDumpBackend::start() { float tempo_scale = 1.0f; float physical_time = 0.0f; - // Temporary buffer for each update chunk + // Temporary buffer for each update chunk (stereo) std::vector<float> chunk_buffer(samples_per_update); for (int update_count = 0; update_count < total_updates; ++update_count) { @@ -83,9 +84,10 @@ void WavDumpBackend::start() { tracker_update(music_time); // Render audio immediately after tracker update (keeps synth time in sync) - synth_render(chunk_buffer.data(), samples_per_update); + // Note: synth_render expects number of FRAMES, outputs stereo (2 samples/frame) + synth_render(chunk_buffer.data(), frames_per_update); - // Convert float to int16 and write to WAV + // Convert float to int16 and write to WAV (stereo interleaved) for (int i = 0; i < samples_per_update; ++i) { float sample = chunk_buffer[i]; if (sample > 1.0f) sample = 1.0f; @@ -104,12 +106,13 @@ void WavDumpBackend::start() { fflush(stdout); } - // Call frame rendering hook - on_frames_rendered(samples_per_update); + // Call frame rendering hook (pass frames, not samples) + on_frames_rendered(frames_per_update); } - printf("\nWAV dump complete: %zu samples (%.2f seconds, %.2f music time)\n", - samples_written_, (float)samples_written_ / kSampleRate, music_time); + printf( + "\nWAV dump complete: %zu samples (%.2f seconds stereo, %.2f music time)\n", + samples_written_, (float)samples_written_ / (kSampleRate * 2), music_time); is_active_ = false; } @@ -129,7 +132,7 @@ void WavDumpBackend::write_wav_header(FILE* file, uint32_t num_samples) { // WAV file header structure // Reference: http://soundfile.sapp.org/doc/WaveFormat/ - const uint32_t num_channels = 1; // Mono + const uint32_t num_channels = 2; // Stereo (matches miniaudio config) const uint32_t sample_rate = kSampleRate; const uint32_t bits_per_sample = 16; const uint32_t byte_rate = sample_rate * num_channels * bits_per_sample / 8; |