avcodec/ac3tab: Move ff_ac3_enc_channel_map to its only user

and make it static.

Reviewed-by: Lynne <dev@lynne.ee>
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>

libavcodec/ac3enc.c

@@ -161,6 +161,15 @@ const uint64_t ff_ac3_channel_layouts[19] = {
      0
 };
 
+/**
+ * Table to remap channels from SMPTE order to AC-3 order.
+ * [channel_mode][lfe][ch]
+ */
+static const uint8_t ac3_enc_channel_map[8][2][6] = {
+    COMMON_CHANNEL_MAP
+    { { 0, 1, 2, 3,    }, { 0, 1, 3, 4, 2,   } },
+    { { 0, 2, 1, 3, 4, }, { 0, 2, 1, 4, 5, 3 } },
+};
 
 /**
  * LUT to select the bandwidth code based on the bit rate, sample rate, and
@@ -2184,7 +2193,7 @@ static av_cold int set_channel_info(AC3EncodeContext *s, int channels,
     s->has_center   = (s->channel_mode & 0x01) && s->channel_mode != AC3_CHMODE_MONO;
     s->has_surround =  s->channel_mode & 0x04;
 
-    s->channel_map  = ff_ac3_enc_channel_map[s->channel_mode][s->lfe_on];
+    s->channel_map  = ac3_enc_channel_map[s->channel_mode][s->lfe_on];
     *channel_layout = ch_layout;
     if (s->lfe_on)
         *channel_layout |= AV_CH_LOW_FREQUENCY;

libavcodec/ac3tab.c

@@ -97,24 +97,6 @@ const uint16_t avpriv_ac3_channel_layout_tab[8] = {
     AV_CH_LAYOUT_5POINT0
 };
 
-#define COMMON_CHANNEL_MAP \
-    { { 0, 1,          }, { 0, 1, 2,         } },\
-    { { 0,             }, { 0, 1,            } },\
-    { { 0, 1,          }, { 0, 1, 2,         } },\
-    { { 0, 2, 1,       }, { 0, 2, 1, 3,      } },\
-    { { 0, 1, 2,       }, { 0, 1, 3, 2,      } },\
-    { { 0, 2, 1, 3,    }, { 0, 2, 1, 4, 3,   } },
-
-/**
- * Table to remap channels from SMPTE order to AC-3 order.
- * [channel_mode][lfe][ch]
- */
-const uint8_t ff_ac3_enc_channel_map[8][2][6] = {
-    COMMON_CHANNEL_MAP
-    { { 0, 1, 2, 3,    }, { 0, 1, 3, 4, 2,   } },
-    { { 0, 2, 1, 3, 4, }, { 0, 2, 1, 4, 5, 3 } },
-};
-
 /**
  * Table to remap channels from AC-3 order to SMPTE order.
  * [channel_mode][lfe][ch]

libavcodec/ac3tab.h

@@ -31,7 +31,6 @@
 extern const uint16_t ff_ac3_frame_size_tab[38][3];
 extern const uint8_t  ff_ac3_channels_tab[8];
 extern av_export_avcodec const uint16_t avpriv_ac3_channel_layout_tab[8];
-extern const uint8_t  ff_ac3_enc_channel_map[8][2][6];
 extern const uint8_t  ff_ac3_dec_channel_map[8][2][6];
 extern const int      ff_ac3_sample_rate_tab[];
 extern const uint16_t ff_ac3_bitrate_tab[19];
@@ -67,4 +66,12 @@ enum CustomChannelMapLocation{
     AC3_CHMAP_LFE =     1<<(15-15)
 };
 
+#define COMMON_CHANNEL_MAP \
+    { { 0, 1,          }, { 0, 1, 2,         } },\
+    { { 0,             }, { 0, 1,            } },\
+    { { 0, 1,          }, { 0, 1, 2,         } },\
+    { { 0, 2, 1,       }, { 0, 2, 1, 3,      } },\
+    { { 0, 1, 2,       }, { 0, 1, 3, 2,      } },\
+    { { 0, 2, 1, 3,    }, { 0, 2, 1, 4, 3,   } },
+
 #endif /* AVCODEC_AC3TAB_H */