[FFmpeg-cvslog] opustab: comment ff_celt_tf_select

[Rostislav Pehlivanov]

ffmpeg | branch: master | Rostislav Pehlivanov <atomnuker at gmail.com> | Mon Jul 10 23:39:56 2017 +0100| [03d8fbc09cdb78c93d1c51f39d783c081b981bac] | committer: Rostislav Pehlivanov

opustab: comment ff_celt_tf_select

Signed-off-by: Rostislav Pehlivanov <atomnuker at gmail.com>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=03d8fbc09cdb78c93d1c51f39d783c081b981bac
---

 libavcodec/opustab.c | 13 +++++++++----
 1 file changed, 9 insertions(+), 4 deletions(-)

diff --git a/libavcodec/opustab.c b/libavcodec/opustab.c
index 5cb0ad6595..635cc363e2 100644
--- a/libavcodec/opustab.c
+++ b/libavcodec/opustab.c
@@ -772,11 +772,16 @@ const uint8_t ff_celt_log_freq_range[] = {
     0,  0,  0,  0,  0,  0,  0,  0,  8,  8,  8,  8, 16, 16, 16, 21, 21, 24, 29, 34, 36
 };
 
+/* Positive - increased freqeuency resolution (only possible on transients)
+ * Negative - increased time resolution */
 const int8_t ff_celt_tf_select[4][2][2][2] = {
-    { { { 0, -1 }, { 0, -1 } }, { { 0, -1 }, { 0, -1 } } },
-    { { { 0, -1 }, { 0, -2 } }, { { 1,  0 }, { 1, -1 } } },
-    { { { 0, -2 }, { 0, -3 } }, { { 2,  0 }, { 1, -1 } } },
-    { { { 0, -2 }, { 0, -3 } }, { { 3,  0 }, { 1, -1 } } }
+    /*          OFF                        ON                Transient frame */
+    /*     OFF        ON             OFF        ON           TF select flag  */
+    /*   OFF  ON    OFF  ON        OFF  ON    OFF  ON        TF change flag  */
+    { { { 0, -1 }, { 0, -1 } }, { { 0, -1 }, { 0, -1 } } }, /* 120 */
+    { { { 0, -1 }, { 0, -2 } }, { { 1,  0 }, { 1, -1 } } }, /* 240 */
+    { { { 0, -2 }, { 0, -3 } }, { { 2,  0 }, { 1, -1 } } }, /* 480 */
+    { { { 0, -2 }, { 0, -3 } }, { { 3,  0 }, { 1, -1 } } }  /* 960 */
 };
 
 const float ff_celt_mean_energy[] = {