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| author | Vitor Sessak <vitor1001@gmail.com> | 2008-06-29 21:37:03 +0000 |
|---|---|---|
| committer | Vitor Sessak <vitor1001@gmail.com> | 2008-06-29 21:37:03 +0000 |
| commit | fe4a5b185fdb5a96c1c66018e113b5144b01f6f3 (patch) | |
| tree | ea31510a01795968de41f2264eb5818fd28acc76 /libavcodec | |
| parent | b83ff6c700a7aefaa54f5389f37f37bccc2d4ee1 (diff) | |
Make ff_acelp_lp_synthesis_filter() receives a pointer to the actual filter coefficients and not the pointer minus one
Originally committed as revision 14031 to svn://svn.ffmpeg.org/ffmpeg/trunk
Diffstat (limited to 'libavcodec')
| -rw-r--r-- | libavcodec/acelp_filters.c | 4 | ||||
| -rw-r--r-- | libavcodec/acelp_filters.h | 2 | ||||
| -rw-r--r-- | libavcodec/ra144.c | 4 |
3 files changed, 7 insertions, 3 deletions
diff --git a/libavcodec/acelp_filters.c b/libavcodec/acelp_filters.c index fb52d0f8c9..6e5b1f46d7 100644 --- a/libavcodec/acelp_filters.c +++ b/libavcodec/acelp_filters.c @@ -121,6 +121,10 @@ int ff_acelp_lp_synthesis_filter( { int i,n; + // These two lines are two avoid a -1 subtraction in the main loop + filter_length++; + filter_coeffs--; + for(n=0; n<buffer_length; n++) { int sum = rounder; diff --git a/libavcodec/acelp_filters.h b/libavcodec/acelp_filters.h index a21fc88a49..0f7ce2977f 100644 --- a/libavcodec/acelp_filters.h +++ b/libavcodec/acelp_filters.h @@ -125,7 +125,7 @@ void ff_acelp_convolve_circ( * \param filter_coeffs filter coefficients (-0x8000 <= (3.12) < 0x8000) * \param in input signal * \param buffer_length amount of data to process - * \param filter_length filter length (11 for 10th order LP filter) + * \param filter_length filter length (10 for 10th order LP filter) * \param stop_on_overflow 1 - return immediately if overflow occurs * 0 - ignore overflows * \param rounder the amount to add for rounding (usually 0x800 or 0xfff) diff --git a/libavcodec/ra144.c b/libavcodec/ra144.c index a7164fdd28..0398b13ced 100644 --- a/libavcodec/ra144.c +++ b/libavcodec/ra144.c @@ -209,9 +209,9 @@ static void do_output_subblock(RA144Context *ractx, const uint16_t *lpc_coefs, BLOCKSIZE*sizeof(*ractx->curr_sblock)); if (ff_acelp_lp_synthesis_filter( - ractx->curr_sblock + 10, lpc_coefs -1, + ractx->curr_sblock + 10, lpc_coefs, ractx->curr_sblock + 10, BLOCKSIZE, - 11, 1, 0xfff) + 10, 1, 0xfff) ) memset(ractx->curr_sblock, 0, 50*sizeof(*ractx->curr_sblock)); } |