Implement xas_bank_player type

Changes:

    * Implement xas_bank_player type to decouple player state from
      sample storage, to allow multiple concurrent players against a
      single sample bank

    * Refactor examples/say.c to use xas_bank_player

1 files changed, 23 insertions, 11 deletions

diff --git a/include/xas/bank.h b/include/xas/bank.h
index 9f877d0..be623f0 100644
--- a/include/xas/bank.h
+++ b/include/xas/bank.h
@@ -5,8 +5,10 @@
 
 #include <xas/audio.h>
 
-#define XAS_BANK_IDLE    0
-#define XAS_BANK_ACTIVE (1 << 0)
+enum xas_bank_player_status {
+   XAS_BANK_PLAYER_STOPPED,
+   XAS_BANK_PLAYER_PLAYING,
+};
 
 typedef struct _xas_bank_entry {
     size_t duration;
@@ -17,13 +19,17 @@ typedef struct _xas_bank {
 
     size_t entry_size,
            entry_count;
+} xas_bank;
+
+typedef struct _xas_bank_player {
+    xas_bank *bank;
+    enum xas_bank_player_status status;
 
-    int flags;
     float gain;
 
     size_t entry,
            index;
-} xas_bank;
+} xas_bank_player;
 
 xas_bank *xas_bank_new(xas_audio_format format,
                            size_t entry_size,
@@ -31,17 +37,23 @@ xas_bank *xas_bank_new(xas_audio_format format,
 
 void xas_bank_destroy(xas_bank *bank);
 
-int xas_bank_play(xas_bank *bank, size_t entry, float gain);
-
-void xas_bank_stop(xas_bank *bank);
-
-int xas_bank_active(xas_bank *bank);
-
 ssize_t xas_bank_record(xas_bank *bank,
                           xas_audio_stream *input,
                           size_t entry_index,
                           size_t count);
 
-xas_audio_stream *xas_bank_stream_new(xas_bank *bank);
+xas_bank_player *xas_bank_player_new(xas_bank *bank);
+
+void xas_bank_player_destroy(xas_bank_player *player);
+
+int xas_bank_player_start(xas_bank_player *player,
+                            size_t entry,
+                            float gain);
+
+int xas_bank_player_stop(xas_bank_player *player);
+
+int xas_bank_player_playing(xas_bank_player *player);
+
+xas_audio_stream *xas_bank_player_stream_new(xas_bank_player *player);
 
 #endif /* _XAS_BANK_H */