test-dev/test_player_sample_sync.c

#include "test.h"

/*
 Two samples played back at the same frequency should always step
 through their sample frames at the same rate, regardless of the
 lengths of their loops. Example: a sample with a loop of 16 frames
 and a sample with a loop of 32 frames should repeat their loops at
 exactly a rate of 2:1 if played at the same frequency.
*/

TEST(test_player_sample_sync)
{
	compare_mixer_data(
		"data/sample_sync.it",
		"data/sample_sync.data");
}
END_TEST
Don't increment voice position by step value at loop/tick end. (#496) Since commit b7d6a6ea, libxmp has added an extra step to voice positions if they are close to or at the end of their loop on a tick boundary. This results in samples with loops being very slightly too fast. This patch corrects this behavior so samples with loops play at the correct speed. The issue can be demonstrated with two looping samples, where one sample is two inverted copies of the other sample. When played back at the same pitch, they should cancel entirely and be silent, but this extra step causes them to gradually diverge instead. 2021-12-22 08:06:29 -07:00			`#include "test.h"`

			`/*`
			`Two samples played back at the same frequency should always step`
			`through their sample frames at the same rate, regardless of the`
			`lengths of their loops. Example: a sample with a loop of 16 frames`
			`and a sample with a loop of 32 frames should repeat their loops at`
			`exactly a rate of 2:1 if played at the same frequency.`
			`*/`

			`TEST(test_player_sample_sync)`
			`{`
			`compare_mixer_data(`
			`"data/sample_sync.it",`
			`"data/sample_sync.data");`
			`}`
			`END_TEST`