From 756e346798021b23357cdfbcb99ceb936ddcb0eb Mon Sep 17 00:00:00 2001 From: Francesco Lavra Date: Fri, 11 Jun 2010 08:05:17 +0000 Subject: 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 --- libavcodec/ra144.c | 34 ++++++++++++++++++++++++++++++++++ 1 file changed, 34 insertions(+) (limited to 'libavcodec/ra144.c') 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 #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)); +} -- cgit v1.2.3