Optimization of AMR NB and WB decoders for MIPS

AMR NB and WB decoders are optimized for MIPS architecture.
Appropriate Makefiles are changed accordingly.

Cnfigure script is changed in order to support optimizations.
 Optimizations are enabled by default when compiling is done for
  mips architecture.
 Appropriate cflags are automatically set.
 Support for several mips CPUs is added in configure script.

New ffmpeg options are added for disabling optimizations.

The FFMPEG option --disable-mipsfpu disables MIPS floating point
 optimizations.
The FFMPEG option --disable-mips32r2 disables MIPS32R2
 optimizations.
The FFMPEG option --disable-mipsdspr1 disables MIPS DSP ASE R1
 optimizations.
The FFMPEG option --disable-mipsdspr2 disables MIPS DSP ASE R2
 optimizations.

Signed-off-by: Nedeljko Babic <nbabic@mips.com>
Reviewed-by: Vitor Sessak <vitor1001@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

1 files changed, 49 insertions, 0 deletions

diff --git a/libavcodec/celp_filters.h b/libavcodec/celp_filters.h
index f7e8fbddd3..f644ec325e 100644
--- a/libavcodec/celp_filters.h
+++ b/libavcodec/celp_filters.h
@@ -25,6 +25,55 @@
 
 #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).