#define MIN_LPC_ORDER 1
#define MAX_LPC_ORDER 32
+/**
+ * LPC analysis type
+ */
+enum FFLPCType {
+ FF_LPC_TYPE_DEFAULT = -1, ///< use the codec default LPC type
+ FF_LPC_TYPE_NONE = 0, ///< do not use LPC prediction or use all zero coefficients
+ FF_LPC_TYPE_FIXED = 1, ///< fixed LPC coefficients
+ FF_LPC_TYPE_LEVINSON = 2, ///< Levinson-Durbin recursion
+ FF_LPC_TYPE_CHOLESKY = 3, ///< Cholesky factorization
+ FF_LPC_TYPE_NB , ///< Not part of ABI
+};
typedef struct LPCContext {
int blocksize;
int max_order;
- enum AVLPCType lpc_type;
+ enum FFLPCType lpc_type;
double *windowed_samples;
/**
const int32_t *samples, int blocksize, int min_order,
int max_order, int precision,
int32_t coefs[][MAX_LPC_ORDER], int *shift,
- enum AVLPCType lpc_type, int lpc_passes,
+ enum FFLPCType lpc_type, int lpc_passes,
int omethod, int max_shift, int zero_shift);
/**
* Initialize LPCContext.
*/
int ff_lpc_init(LPCContext *s, int blocksize, int max_order,
- enum AVLPCType lpc_type);
+ enum FFLPCType lpc_type);
void ff_lpc_init_x86(LPCContext *s);
/**