[FFmpeg-cvslog] aacdec: Use macros for constants

[Rostislav Pehlivanov]

ffmpeg | branch: master | Rostislav Pehlivanov <atomnuker at gmail.com> | Tue Apr 14 00:33:52 2015 +0100| [a61c75e9f77a063cdcf2e68ee752c08a3ff8173d] | committer: Michael Niedermayer

aacdec: Use macros for constants

This commit replaces the previous hardcoded constants with both new and previously
defined macros from aac.h. This change makes it easy for anyone reading the code
to know how encoding and decoding scalefactors works. It's also possibly
a step in unifying some of the code across both the encoder and decoder.

Reviewed-by: Claudio Freire <klaussfreire at gmail.com>
Signed-off-by: Michael Niedermayer <michaelni at gmx.at>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=a61c75e9f77a063cdcf2e68ee752c08a3ff8173d
---

 libavcodec/aacdec.c |   10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/libavcodec/aacdec.c b/libavcodec/aacdec.c
index 5a0c05a..1a2ddc2 100644
--- a/libavcodec/aacdec.c
+++ b/libavcodec/aacdec.c
@@ -1394,7 +1394,7 @@ static int decode_scalefactors(AACContext *ac, float sf[120], GetBitContext *gb,
                                int band_type_run_end[120])
 {
     int g, i, idx = 0;
-    int offset[3] = { global_gain, global_gain - 90, 0 };
+    int offset[3] = { global_gain, global_gain - NOISE_OFFSET, 0 };
     int clipped_offset;
     int noise_flag = 1;
     for (g = 0; g < ics->num_window_groups; g++) {
@@ -1406,7 +1406,7 @@ static int decode_scalefactors(AACContext *ac, float sf[120], GetBitContext *gb,
             } else if ((band_type[idx] == INTENSITY_BT) ||
                        (band_type[idx] == INTENSITY_BT2)) {
                 for (; i < run_end; i++, idx++) {
-                    offset[2] += get_vlc2(gb, vlc_scalefactors.table, 7, 3) - 60;
+                    offset[2] += get_vlc2(gb, vlc_scalefactors.table, 7, 3) - SCALE_DIFF_ZERO;
                     clipped_offset = av_clip(offset[2], -155, 100);
                     if (offset[2] != clipped_offset) {
                         avpriv_request_sample(ac->avctx,
@@ -1419,9 +1419,9 @@ static int decode_scalefactors(AACContext *ac, float sf[120], GetBitContext *gb,
             } else if (band_type[idx] == NOISE_BT) {
                 for (; i < run_end; i++, idx++) {
                     if (noise_flag-- > 0)
-                        offset[1] += get_bits(gb, 9) - 256;
+                        offset[1] += get_bits(gb, NOISE_PRE_BITS) - NOISE_PRE;
                     else
-                        offset[1] += get_vlc2(gb, vlc_scalefactors.table, 7, 3) - 60;
+                        offset[1] += get_vlc2(gb, vlc_scalefactors.table, 7, 3) - SCALE_DIFF_ZERO;
                     clipped_offset = av_clip(offset[1], -100, 155);
                     if (offset[1] != clipped_offset) {
                         avpriv_request_sample(ac->avctx,
@@ -1433,7 +1433,7 @@ static int decode_scalefactors(AACContext *ac, float sf[120], GetBitContext *gb,
                 }
             } else {
                 for (; i < run_end; i++, idx++) {
-                    offset[0] += get_vlc2(gb, vlc_scalefactors.table, 7, 3) - 60;
+                    offset[0] += get_vlc2(gb, vlc_scalefactors.table, 7, 3) - SCALE_DIFF_ZERO;
                     if (offset[0] > 255U) {
                         av_log(ac->avctx, AV_LOG_ERROR,
                                "Scalefactor (%d) out of range.\n", offset[0]);