#include <stdint.h>
+typedef struct CELPFContext {
+ /**
+ * LP synthesis filter.
+ * @param[out] out pointer to output buffer
+ * - the array out[-filter_length, -1] must
+ * contain the previous result of this filter
+ * @param filter_coeffs filter coefficients.
+ * @param in input signal
+ * @param buffer_length amount of data to process
+ * @param filter_length filter length (10 for 10th order LP filter). Must be
+ * greater than 4 and even.
+ *
+ * @note Output buffer must contain filter_length samples of past
+ * speech data before pointer.
+ *
+ * Routine applies 1/A(z) filter to given speech data.
+ */
+ void (*celp_lp_synthesis_filterf)(float *out, const float *filter_coeffs,
+ const float *in, int buffer_length,
+ int filter_length);
+
+ /**
+ * LP zero synthesis filter.
+ * @param[out] out pointer to output buffer
+ * @param filter_coeffs filter coefficients.
+ * @param in input signal
+ * - the array in[-filter_length, -1] must
+ * contain the previous input of this filter
+ * @param buffer_length amount of data to process (should be a multiple of eight)
+ * @param filter_length filter length (10 for 10th order LP filter;
+ * should be a multiple of two)
+ *
+ * @note Output buffer must contain filter_length samples of past
+ * speech data before pointer.
+ *
+ * Routine applies A(z) filter to given speech data.
+ */
+ void (*celp_lp_zero_synthesis_filterf)(float *out, const float *filter_coeffs,
+ const float *in, int buffer_length,
+ int filter_length);
+
+}CELPFContext;
+
+/**
+ * Initialize CELPFContext.
+ */
+void ff_celp_filter_init(CELPFContext *c);
+void ff_celp_filter_init_mips(CELPFContext *c);
+
/**
* Circularly convolve fixed vector with a phase dispersion impulse
* response filter (D.6.2 of G.729 and 6.1.5 of AMR).