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authorFrancesco Lavra <francescolavra@interfree.it>2010-06-11 08:05:17 +0000
committerVitor Sessak <vitor1001@gmail.com>2010-06-11 08:05:17 +0000
commit756e346798021b23357cdfbcb99ceb936ddcb0eb (patch)
treeb75c2ded7f17e60619b51f02abe1af9c57a189a0 /libavcodec/ra144.c
parent5ec29beeb4922e57786075cb426d9c9c4125627e (diff)
downloadffmpeg-756e346798021b23357cdfbcb99ceb936ddcb0eb.tar.gz
Split do_output_subblock() into common code and decoder specific parts
Patch by Francesco Lavra (firstnamelastname@interfree.it) Originally committed as revision 23576 to svn://svn.ffmpeg.org/ffmpeg/trunk
Diffstat (limited to 'libavcodec/ra144.c')
-rw-r--r--libavcodec/ra144.c34
1 files changed, 34 insertions, 0 deletions
diff --git a/libavcodec/ra144.c b/libavcodec/ra144.c
index c528c3274a..35b7921ec4 100644
--- a/libavcodec/ra144.c
+++ b/libavcodec/ra144.c
@@ -21,6 +21,7 @@
#include <stdint.h>
#include "avcodec.h"
+#include "celp_filters.h"
#include "ra144.h"
const int16_t ff_gain_val_tab[256][3] = {
@@ -1684,3 +1685,36 @@ int ff_irms(const int16_t *data)
return 0x20000000 / (ff_t_sqrt(sum) >> 8);
}
+
+void ff_subblock_synthesis(RA144Context *ractx, const uint16_t *lpc_coefs,
+ int cba_idx, int cb1_idx, int cb2_idx,
+ int gval, int gain)
+{
+ uint16_t buffer_a[40];
+ uint16_t *block;
+ int m[3];
+
+ if (cba_idx) {
+ cba_idx += BLOCKSIZE/2 - 1;
+ ff_copy_and_dup(buffer_a, ractx->adapt_cb, cba_idx);
+ m[0] = (ff_irms(buffer_a) * gval) >> 12;
+ } else {
+ m[0] = 0;
+ }
+ m[1] = (ff_cb1_base[cb1_idx] * gval) >> 8;
+ m[2] = (ff_cb2_base[cb2_idx] * gval) >> 8;
+ memmove(ractx->adapt_cb, ractx->adapt_cb + BLOCKSIZE,
+ (BUFFERSIZE - BLOCKSIZE) * sizeof(*ractx->adapt_cb));
+
+ block = ractx->adapt_cb + BUFFERSIZE - BLOCKSIZE;
+
+ ff_add_wav(block, gain, cba_idx, m, cba_idx? buffer_a: NULL,
+ ff_cb1_vects[cb1_idx], ff_cb2_vects[cb2_idx]);
+
+ memcpy(ractx->curr_sblock, ractx->curr_sblock + 40,
+ 10*sizeof(*ractx->curr_sblock));
+
+ if (ff_celp_lp_synthesis_filter(ractx->curr_sblock + 10, lpc_coefs,
+ block, BLOCKSIZE, 10, 1, 0xfff))
+ memset(ractx->curr_sblock, 0, 50*sizeof(*ractx->curr_sblock));
+}