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Update comment to version, negotiated with Diego, and

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fix missing period (not latest revision of patch
was wrongly committed).

Originally committed as revision 13113 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Vladimir Voroshilov 2008-05-11 10:07:11 +00:00
parent 7c96587c17
commit 542c064d1b
2 changed files with 7 additions and 8 deletions
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13
libavcodec/acelp_filters.c
View File

@ -37,13 +37,12 @@ void ff_acelp_convolve_circ(
memset(fc_out, 0, subframe_size * sizeof(int16_t));
/* Since there are few pulses over entire subframe (i.e. almost all
fc_in[i] are zero, in case of G.729D the buffer contains two non-zero
samples before the call to ff_acelp_enhance_harmonics, and (due to
pitch_delay bounded to [20; 143]) a maximum four non-zero samples
for a total of 40 after the call to it), it is faster to swap two loops
and process non-zero samples only. This will reduce the number of
multiplications from 40*40 to 4*40 for G.729D */
/* Since there are few pulses over an entire subframe (i.e. almost
all fc_in[i] are zero) it is faster to swap two loops and process
non-zero samples only. In the case of G.729D the buffer contains
two non-zero samples before the call to ff_acelp_enhance_harmonics
and, due to pitch_delay being bounded by [20; 143], a maximum
of four non-zero samples for a total of 40 after the call. */
for(i=0; i<subframe_size; i++)
{
if(fc_in[i])

2
libavcodec/acelp_filters.h
View File

@ -97,7 +97,7 @@ void ff_acelp_weighted_filter(
* \note Two items before the top of the out buffer must contain two items from the
* tail of the previous subframe.
*
* \remark It is safe to pass the same array in in and out parameters
* \remark It is safe to pass the same array in in and out parameters.
*
* \remark AMR uses mostly the same filter (cut-off frequency 60Hz, same formula,
* but constants differs in 5th sign after comma). Fortunately in