aacenc: add AAC_CODER_(FAAC|ANMR|etc.) macros

Signed-off-by: NTimothy Gu <timothygu99@gmail.com>
Signed-off-by: NMichael Niedermayer <michaelni@gmx.at>

libavcodec/aaccoder.c

@@ -1113,25 +1113,25 @@ static void search_for_ms(AACEncContext *s, ChannelElement *cpe,
 }
 
 AACCoefficientsEncoder ff_aac_coders[AAC_CODER_NB] = {
-    {
+    [AAC_CODER_FAAC] = {
         search_for_quantizers_faac,
         encode_window_bands_info,
         quantize_and_encode_band,
         search_for_ms,
     },
-    {
+    [AAC_CODER_ANMR] = {
         search_for_quantizers_anmr,
         encode_window_bands_info,
         quantize_and_encode_band,
         search_for_ms,
     },
-    {
+    [AAC_CODER_TWOLOOP] = {
         search_for_quantizers_twoloop,
         codebook_trellis_rate,
         quantize_and_encode_band,
         search_for_ms,
     },
-    {
+    [AAC_CODER_FAST] = {
         search_for_quantizers_fast,
         encode_window_bands_info,
         quantize_and_encode_band,

libavcodec/aacenc.h

@@ -30,7 +30,12 @@
 #include "audio_frame_queue.h"
 #include "psymodel.h"
 
-#define AAC_CODER_NB 4
+#define AAC_CODER_FAAC    0
+#define AAC_CODER_ANMR    1
+#define AAC_CODER_TWOLOOP 2
+#define AAC_CODER_FAST    3
+
+#define AAC_CODER_NB      4
 
 typedef struct AACEncOptions {
     int stereo_mode;