diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/wav.c | 25 | ||||
| -rw-r--r-- | src/wav.h | 7 |
2 files changed, 32 insertions, 0 deletions
@@ -1,4 +1,5 @@ #include "wav.h" +#include "common.h" #include "smrt_arena.h" #include <assert.h> @@ -260,3 +261,27 @@ f64 *read_32bps_float_data(smrt_arena_t *arena, wav_data_t data, u16 num_channel return vs; } + +f64 *combine_channels(smrt_arena_t *arena, f64 **channels, u64 num_channels, u64 sample_count) { + assert(num_channels != 0 && "num_channels must be >0"); + + f64 *samples = SMRTA_ALLOC_ARRAY(arena, f64, num_channels * sample_count); + + for (u64 s = 0; s < sample_count; s++) { + for (u64 c = 0; c < num_channels; c++) { + samples[s*num_channels + c] = channels[c][s]; + } + } + + return samples; +} + +f32 *f64_to_f32(smrt_arena_t *arena, f64 *samples, u64 sample_count) { + f32 *o = SMRTA_ALLOC_ARRAY(arena, f32, sample_count); + + for (u64 i = 0; i < sample_count; i++) { + o[i] = (f32)samples[i]; + } + + return o; +} @@ -62,6 +62,7 @@ wav_fmt_chunk_t make_wav_fmt_chunk(u32 num_channels , /// Load WAV data into [-1.0, 1.0] f64 amplitudes. Populates -o inputs with information. /// samples will be amplitude data for each channel from the WAV file, of length sample_count. +/// align_up_memoryn will align allocation up to nearest multiple (For FFT) void wav_load(smrt_arena_t *arena, FILE *wav, f64 *** samples_o , u16 *channel_count_o , u64 * sample_count_o , @@ -73,3 +74,9 @@ f64 * read_8bps_data(smrt_arena_t *arena, wav_data_t data, u16 num_channel f64 * read_16bps_data(smrt_arena_t *arena, wav_data_t data, u16 num_channels, u16 channel, u64 align_up_memoryn); f64 * read_24bps_data(smrt_arena_t *arena, wav_data_t data, u16 num_channels, u16 channel, u64 align_up_memoryn); f64 *read_32bps_float_data(smrt_arena_t *arena, wav_data_t data, u16 num_channels, u16 channel, u64 align_up_memoryn); + +/// Combine channel_count arrays of sample_count samples from **channels +/// Interleaving for WAV format audio storage. +f64 *combine_channels(smrt_arena_t *arena, f64 **channels, u64 channel_count, u64 sample_count); + +f32 *f64_to_f32(smrt_arena_t *arena, f64 *samples, u64 sample_count); |