Change eval API to take parent log context and log level offset.

[libav.git] / libavcodec / eval.h

diff --git a/libavcodec/eval.h b/libavcodec/eval.h
index 7935fc8..5f208e5 100644 (file)
--- a/libavcodec/eval.h
+++ b/libavcodec/eval.h
@@ -1,6 +1,4 @@
 /*
- * simple arithmetic expression evaluator
- *
  * Copyright (c) 2002 Michael Niedermayer <michaelni@gmx.at>
  *
  * This file is part of FFmpeg.
@@ -21,58 +19,67 @@
  */
 
 /**
- * @file libavcodec/eval.h
- * eval header.
+ * @file
+ * simple arithmetic expression evaluator
  */
 
 #ifndef AVCODEC_EVAL_H
 #define AVCODEC_EVAL_H
 
-typedef struct ff_expr_s AVExpr;
+typedef struct AVExpr AVExpr;
 
 /**
  * Parses and evaluates an expression.
- * Note, this is significantly slower than ff_parse_eval()
+ * Note, this is significantly slower than ff_eval_expr().
+ *
  * @param s expression as a zero terminated string for example "1+2^3+5*5+sin(2/3)"
- * @param func1 NULL terminated array of function pointers for functions which take 1 argument
- * @param func2 NULL terminated array of function pointers for functions which take 2 arguments
  * @param const_name NULL terminated array of zero terminated strings of constant identifers for example {"PI", "E", 0}
+ * @param const_value a zero terminated array of values for the identifers from const_name
  * @param func1_name NULL terminated array of zero terminated strings of func1 identifers
+ * @param func1 NULL terminated array of function pointers for functions which take 1 argument
  * @param func2_name NULL terminated array of zero terminated strings of func2 identifers
- * @param error pointer to a char* which is set to an error message if something goes wrong
- * @param const_value a zero terminated array of values for the identifers from const_name
+ * @param func2 NULL terminated array of function pointers for functions which take 2 arguments
  * @param opaque a pointer which will be passed to all functions from func1 and func2
+ * @param log_ctx parent logging context
  * @return the value of the expression
  */
-double ff_eval2(const char *s, const double *const_value, const char * const *const_name,
-               double (**func1)(void *, double), const char **func1_name,
-               double (**func2)(void *, double, double), const char **func2_name,
-               void *opaque, const char **error);
+double ff_parse_and_eval_expr(const char *s,
+                              const char * const *const_name, const double *const_value,
+                              const char * const *func1_name, double (* const *func1)(void *, double),
+                              const char * const *func2_name, double (* const *func2)(void *, double, double),
+                              void *opaque, int log_offset, void *log_ctx);
 
 /**
- * Parses a expression.
+ * Parses an expression.
+ *
  * @param s expression as a zero terminated string for example "1+2^3+5*5+sin(2/3)"
- * @param func1 NULL terminated array of function pointers for functions which take 1 argument
- * @param func2 NULL terminated array of function pointers for functions which take 2 arguments
  * @param const_name NULL terminated array of zero terminated strings of constant identifers for example {"PI", "E", 0}
  * @param func1_name NULL terminated array of zero terminated strings of func1 identifers
+ * @param func1 NULL terminated array of function pointers for functions which take 1 argument
  * @param func2_name NULL terminated array of zero terminated strings of func2 identifers
- * @param error pointer to a char* which is set to an error message if something goes wrong
+ * @param func2 NULL terminated array of function pointers for functions which take 2 arguments
+ * @param log_ctx parent logging context
  * @return AVExpr which must be freed with ff_free_expr() by the user when it is not needed anymore
  *         NULL if anything went wrong
  */
-AVExpr * ff_parse(const char *s, const char * const *const_name,
-               double (**func1)(void *, double), const char **func1_name,
-               double (**func2)(void *, double, double), const char **func2_name,
-               const char **error);
+AVExpr *ff_parse_expr(const char *s,
+                      const char * const *const_name,
+                      const char * const *func1_name, double (* const *func1)(void *, double),
+                      const char * const *func2_name, double (* const *func2)(void *, double, double),
+                      int log_offset, void *log_ctx);
+
 /**
  * Evaluates a previously parsed expression.
+ *
  * @param const_value a zero terminated array of values for the identifers from ff_parse const_name
  * @param opaque a pointer which will be passed to all functions from func1 and func2
  * @return the value of the expression
  */
-double ff_parse_eval(AVExpr * e, const double *const_value, void *opaque);
+double ff_eval_expr(AVExpr * e, const double *const_value, void *opaque);
 
+/**
+ * Frees a parsed expression previously created with ff_parse().
+ */
 void ff_free_expr(AVExpr *e);
 
 /**