Decoder: turn FSM switch into functions

1 files changed, 46 insertions, 0 deletions

diff --git a/src/decode.h b/src/decode.h
new file mode 100644
index 0000000..8bd50ab
--- /dev/null
+++ b/src/decode.h
@@ -0,0 +1,46 @@
+#ifndef DECODE_H
+#define DECODE_H
+
+#include <config.h>
+
+#if HAVE_STDINT_H
+# include <stdint.h>
+#endif
+
+#include "libaec.h"
+
+#define M_CONTINUE 1
+#define M_EXIT 0
+
+#define SAFE (strm->avail_in >= state->in_blklen        \
+              && strm->avail_out >= state->out_blklen)
+
+#define ROS 5
+#define MIN(a, b) (((a) < (b))? (a): (b))
+
+struct internal_state {
+    int (*mode)(struct aec_stream *);
+    int id;            /* option ID */
+    int id_len;        /* bit length of code option identification key */
+    int (**id_table)(struct aec_stream *); /* table maps IDs to states */
+    void (*put_sample)(struct aec_stream *, int64_t);
+    int ref_int;       /* reference sample is every ref_int samples */
+    int64_t last_out;  /* previous output for post-processing */
+    int64_t xmin;      /* minimum integer for post-processing */
+    int64_t xmax;      /* maximum integer for post-processing */
+    int in_blklen;     /* length of uncompressed input block
+                          should be the longest possible block */
+    int out_blklen;    /* length of output block in bytes */
+    int n, i;          /* counter for samples */
+    int64_t *block;    /* block buffer for split-sample options */
+    int se;            /* set if second extension option is selected */
+    uint64_t acc;      /* accumulator for currently used bit sequence */
+    int bitp;          /* bit pointer to the next unused bit in accumulator */
+    int fs;            /* last fundamental sequence in accumulator */
+    int ref;           /* 1 if current block has reference sample */
+    int pp;            /* 1 if postprocessor has to be used */
+    int byte_per_sample;
+    size_t samples_out;
+} decode_state;
+
+#endif /* DECODE_H */