[FFmpeg-soc] [soc]: r465 - in qcelp: doc/TODO qcelpdata.h qcelpdec.c

[Benjamin Larsson]

reynaldo wrote:
> Author: reynaldo
> Date: Tue Jul 17 21:39:21 2007
> New Revision: 465
> 
> Log:
> - Implemented pitch synthesis filter
> 
> 
> Modified:
>    qcelp/doc/TODO
>    qcelp/qcelpdata.h
>    qcelp/qcelpdec.c
> 
> Modified: qcelp/doc/TODO
> ==============================================================================
> --- qcelp/doc/TODO	(original)
> +++ qcelp/doc/TODO	Tue Jul 17 21:39:21 2007
> @@ -1,17 +1,15 @@
> -Clear:
> +Clear
>  
> -- finish the codebook transmission code's conversion to gain, index and
> -  (when needed) cbseed (almost done).
> -- review rates 1 and 1/2 gain predictor calculations.
> -- review qcelp_compute_cdn().
> +- Finish Pitch synthesis filter (almost done).
> +- Pitch pre-filter.
>  
>  Still somewhat fuzzy:
>  
> -- Pitch synthesis filter.
>  - Pitch pre-filter.
>  - LSP freqs interpolation.
>  - Formant synthesis filter.
>  - Adaptive postfilter.
> +
>  - Workability tests / Sample smashing
>  - Fixes (if needed :-)
>  
> 
> Modified: qcelp/qcelpdata.h
> ==============================================================================
> --- qcelp/qcelpdata.h	(original)
> +++ qcelp/qcelpdata.h	Tue Jul 17 21:39:21 2007
> @@ -25,6 +25,9 @@
>   */
>  
>  #define FXQ(v)  (roundf(16384.0*v)/16384.0)
> +#ifndef PI
> +#define PI 3.141592653
> +#endif
>  
>  typedef enum
>  {
> 
> Modified: qcelp/qcelpdec.c
> ==============================================================================
> --- qcelp/qcelpdec.c	(original)
> +++ qcelp/qcelpdec.c	Tue Jul 17 21:39:21 2007
> @@ -267,6 +267,75 @@ static int qcelp_compute_svector(qcelp_p
>      return 1;
>  }
>  
> +/**
> + * Computes hammsinc(x), this will probably be replaced
> + * by a lookup table
> + */
> +static float qcelp_hammsinc(int i)
> +{
> +    return (sin(PI*i)/(PI*i))*(0.5+0.46*cos(PI*i/4));
> +}
> +

PI -> M_PI

/Benjamin