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authorReynaldo H. Verdejo Pinochet <reynaldo@opendot.cl>2009-03-09 21:55:24 +0000
committerReynaldo H. Verdejo Pinochet <reynaldo@opendot.cl>2009-03-09 21:55:24 +0000
commit95e83257715818d113724eb92035f4e685d1ec11 (patch)
treec0bf7092251919b30fc7610f3c513078f077240d
parent88c4339bda6f2ad0e6e431b5c45e32d44d44a344 (diff)
downloadffmpeg-95e83257715818d113724eb92035f4e685d1ec11.tar.gz
Functional part Kenan Gillet's 'extract and share weighted_vector_sumf'
patchset. Idea is to share this common code between the AMR and QCELP decoders. Originally committed as revision 17916 to svn://svn.ffmpeg.org/ffmpeg/trunk
-rw-r--r--libavcodec/Makefile2
-rw-r--r--libavcodec/acelp_vectors.c10
-rw-r--r--libavcodec/acelp_vectors.h14
-rw-r--r--libavcodec/qcelpdec.c16
4 files changed, 28 insertions, 14 deletions
diff --git a/libavcodec/Makefile b/libavcodec/Makefile
index ee0d24d403..13415fc0d2 100644
--- a/libavcodec/Makefile
+++ b/libavcodec/Makefile
@@ -165,7 +165,7 @@ OBJS-$(CONFIG_PNG_DECODER) += png.o pngdec.o
OBJS-$(CONFIG_PNG_ENCODER) += png.o pngenc.o
OBJS-$(CONFIG_PPM_ENCODER) += pnmenc.o pnm.o
OBJS-$(CONFIG_PTX_DECODER) += ptx.o
-OBJS-$(CONFIG_QCELP_DECODER) += qcelpdec.o qcelp_lsp.o celp_math.o celp_filters.o
+OBJS-$(CONFIG_QCELP_DECODER) += qcelpdec.o qcelp_lsp.o celp_math.o celp_filters.o acelp_vectors.o
OBJS-$(CONFIG_QDM2_DECODER) += qdm2.o mpegaudiodec.o mpegaudiodecheader.o mpegaudio.o mpegaudiodata.o
OBJS-$(CONFIG_QDRAW_DECODER) += qdrw.o
OBJS-$(CONFIG_QPEG_DECODER) += qpeg.o
diff --git a/libavcodec/acelp_vectors.c b/libavcodec/acelp_vectors.c
index cae6318fa0..5443006718 100644
--- a/libavcodec/acelp_vectors.c
+++ b/libavcodec/acelp_vectors.c
@@ -145,3 +145,13 @@ void ff_acelp_weighted_vector_sum(
in_b[i] * weight_coeff_b +
rounder) >> shift);
}
+
+void ff_weighted_vector_sumf(float *out, const float *in_a, const float *in_b,
+ float weight_coeff_a, float weight_coeff_b, int length)
+{
+ int i;
+
+ for(i=0; i<length; i++)
+ out[i] = weight_coeff_a * in_a[i]
+ + weight_coeff_b * in_b[i];
+}
diff --git a/libavcodec/acelp_vectors.h b/libavcodec/acelp_vectors.h
index a5e71fc128..3a47a7b61c 100644
--- a/libavcodec/acelp_vectors.h
+++ b/libavcodec/acelp_vectors.h
@@ -150,4 +150,18 @@ void ff_acelp_weighted_vector_sum(
int shift,
int length);
+/**
+ * float implementation of weighted sum of two vectors.
+ * @param out [out] result of addition
+ * @param in_a first vector
+ * @param in_b second vector
+ * @param weight_coeff_a first vector weight coefficient
+ * @param weight_coeff_a second vector weight coefficient
+ * @param length vectors length
+ *
+ * @note It is safe to pass the same buffer for out and in_a or in_b.
+ */
+void ff_weighted_vector_sumf(float *out, const float *in_a, const float *in_b,
+ float weight_coeff_a, float weight_coeff_b, int length);
+
#endif /* AVCODEC_ACELP_VECTORS_H */
diff --git a/libavcodec/qcelpdec.c b/libavcodec/qcelpdec.c
index c7d2938c0a..9af3467a96 100644
--- a/libavcodec/qcelpdec.c
+++ b/libavcodec/qcelpdec.c
@@ -37,6 +37,7 @@
#include "celp_math.h"
#include "celp_filters.h"
+#include "acelp_vectors.h"
#undef NDEBUG
#include <assert.h>
@@ -81,17 +82,6 @@ typedef struct
*/
void ff_celp_lspf2lpc(const double *lspf, float *lpc);
-static void weighted_vector_sumf(float *out, const float *in_a,
- const float *in_b, float weight_coeff_a,
- float weight_coeff_b, int length)
-{
- int i;
-
- for(i=0; i<length; i++)
- out[i] = weight_coeff_a * in_a[i]
- + weight_coeff_b * in_b[i];
-}
-
/**
* Initialize the speech codec according to the specification.
*
@@ -174,7 +164,7 @@ static int decode_lspf(QCELPContext *q, float *lspf)
lspf[i-1] = FFMIN(lspf[i-1], (lspf[i] - QCELP_LSP_SPREAD_FACTOR));
// Low-pass filter the LSP frequencies.
- weighted_vector_sumf(lspf, lspf, q->prev_lspf, smooth, 1.0-smooth, 10);
+ ff_weighted_vector_sumf(lspf, lspf, q->prev_lspf, smooth, 1.0-smooth, 10);
}else
{
q->octave_count = 0;
@@ -640,7 +630,7 @@ void interpolate_lpc(QCELPContext *q, const float *curr_lspf, float *lpc,
if(weight != 1.0)
{
- weighted_vector_sumf(interpolated_lspf, curr_lspf, q->prev_lspf,
+ ff_weighted_vector_sumf(interpolated_lspf, curr_lspf, q->prev_lspf,
weight, 1.0 - weight, 10);
lspf2lpc(interpolated_lspf, lpc);
}else if(q->bitrate >= RATE_QUARTER ||