From ac7cc9194cdf85b676aea03a8998fa95d629115e Mon Sep 17 00:00:00 2001
From: XANTRONIX Development
Date: Sat, 22 Jul 2023 16:09:39 -0400
Subject: Begin SOLA refactor

---
 include/xas/audio.h |  2 ++
 include/xas/bank.h  | 34 +++++++++++++++++++++++++++++++---
 2 files changed, 33 insertions(+), 3 deletions(-)

(limited to 'include/xas')

diff --git a/include/xas/audio.h b/include/xas/audio.h
index 76d38ce..4989333 100644
--- a/include/xas/audio.h
+++ b/include/xas/audio.h
@@ -73,6 +73,8 @@ void xas_audio_apply_gain(xas_audio_format format,
                             size_t index,
                             size_t count);
 
+void *xas_audio_buffer_alloc(xas_audio_format format, size_t buffer_size);
+
 xas_audio_stream *xas_audio_stream_new_sink(xas_audio_drain drain,
                                                 xas_audio_cleanup cleanup,
                                                 xas_audio_format format,
diff --git a/include/xas/bank.h b/include/xas/bank.h
index 3ff5994..92074f6 100644
--- a/include/xas/bank.h
+++ b/include/xas/bank.h
@@ -9,8 +9,22 @@
 
 #define XAS_BANK_PLAYER_DEFAULT_GAIN 1.0f
 
-#define XAS_BANK_PLAYER_NONE 0
-#define XAS_BANK_PLAYER_LOOP (1 << 0)
+#define XAS_BANK_PLAYER_DURATION_MAX 10.0f
+
+#define XAS_BANK_PLAYER_NONE         0
+#define XAS_BANK_PLAYER_LOOP        (1 << 0)
+#define XAS_BANK_PLAYER_SCALE_TIME  (1 << 1)
+#define XAS_BANK_PLAYER_SCALE_PITCH (1 << 2)
+
+#define XAS_BANK_PLAYER_SOLA_SEQUENCE 100
+#define XAS_BANK_PLAYER_SOLA_OVERLAP   20
+#define XAS_BANK_PLAYER_SOLA_WINDOW    15
+
+#define XAS_BANK_PLAYER_SOLA_FLAT_DURATION \
+    (XAS_BANK_PLAYER_SOLA_SEQUENCE - 2 * (XAS_BANK_PLAYER_SOLA_OVERLAP))
+
+#define XAS_BANK_PLAYER_SOLA_SEQUENCE_SKIP(scale) \
+    ((XAS_BANK_PLAYER_SOLA_SEQUENCE - XAS_BANK_PLAYER_SOLA_OVERLAP) * scale)
 
 enum xas_bank_player_status {
    XAS_BANK_PLAYER_STOPPED,
@@ -35,10 +49,20 @@ typedef struct _xas_bank_player {
     enum xas_bank_player_status status;
     int flags;
 
-    float gain;
+    float gain,
+          duration,
+          pitch;
 
     size_t entry,
            index;
+
+    void *buffer;
+    size_t buffer_size;
+
+    size_t sola_sequence,
+           sola_overlap,
+           sola_window,
+           sola_flat;
 } xas_bank_player;
 
 xas_bank *xas_bank_new(xas_audio_format format,
@@ -66,6 +90,10 @@ void xas_bank_player_destroy(xas_bank_player *player);
 
 void xas_bank_player_set_gain(xas_bank_player *player, float gain);
 
+void xas_bank_player_set_duration(xas_bank_player *player, float factor);
+
+void xas_bank_player_set_pitch(xas_bank_player *player, float factor);
+
 int xas_bank_player_set_entry(xas_bank_player *player, size_t entry);
 
 int xas_bank_player_start(xas_bank_player *player);
-- 
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