cosmetics: rename ac3 tables

Originally committed as revision 11193 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavcodec/ac3.c

@@ -72,7 +72,7 @@ void ff_ac3_bit_alloc_calc_psd(int8_t *exp, int start, int end, int16_t *psd,
         for(i=j;i<end1;i++) {
             /* logadd */
             int adr = FFMIN(FFABS(v - psd[j]) >> 1, 255);
-            v = FFMAX(v, psd[j]) + ff_ac3_latab[adr];
+            v = FFMAX(v, psd[j]) + ff_ac3_log_add_tab[adr];
             j++;
         }
         bndpsd[k]=v;
@@ -149,7 +149,7 @@ void ff_ac3_bit_alloc_calc_mask(AC3BitAllocParameters *s, int16_t *bndpsd,
         if (tmp > 0) {
             excite[bin] += tmp >> 2;
         }
-        mask[bin] = FFMAX(ff_ac3_hth[bin >> s->halfratecod][s->fscod], excite[bin]);
+        mask[bin] = FFMAX(ff_ac3_hearing_threshold_tab[bin >> s->halfratecod][s->fscod], excite[bin]);
     }
 
     /* delta bit allocation */
@@ -187,10 +187,10 @@ void ff_ac3_bit_alloc_calc_bap(int16_t *mask, int16_t *psd, int start, int end,
     j = masktab[start];
     do {
         v = (FFMAX(mask[j] - snroffset - floor, 0) & 0x1FE0) + floor;
-        end1 = FFMIN(bndtab[j] + ff_ac3_bndsz[j], end);
+        end1 = FFMIN(bndtab[j] + ff_ac3_critical_band_size_tab[j], end);
         for (k = i; k < end1; k++) {
             address = av_clip((psd[i] - v) >> 5, 0, 63);
-            bap[i] = ff_ac3_baptab[address];
+            bap[i] = ff_ac3_bap_tab[address];
             i++;
         }
     } while (end > bndtab[j++]);
@@ -231,7 +231,7 @@ void ac3_common_init(void)
     l = 0;
     for(i=0;i<50;i++) {
         bndtab[i] = l;
-        v = ff_ac3_bndsz[i];
+        v = ff_ac3_critical_band_size_tab[i];
         for(j=0;j<v;j++) masktab[k++]=i;
         l += v;
     }

libavcodec/ac3_parser.c

@@ -76,10 +76,10 @@ int ff_ac3_parse_header(const uint8_t buf[7], AC3HeaderInfo *hdr)
     hdr->lfeon = get_bits1(&gbc);
 
     hdr->halfratecod = FFMAX(hdr->bsid, 8) - 8;
-    hdr->sample_rate = ff_ac3_freqs[hdr->fscod] >> hdr->halfratecod;
-    hdr->bit_rate = (ff_ac3_bitratetab[hdr->frmsizecod>>1] * 1000) >> hdr->halfratecod;
-    hdr->channels = ff_ac3_channels[hdr->acmod] + hdr->lfeon;
-    hdr->frame_size = ff_ac3_frame_sizes[hdr->frmsizecod][hdr->fscod] * 2;
+    hdr->sample_rate = ff_ac3_sample_rate_tab[hdr->fscod] >> hdr->halfratecod;
+    hdr->bit_rate = (ff_ac3_bitrate_tab[hdr->frmsizecod>>1] * 1000) >> hdr->halfratecod;
+    hdr->channels = ff_ac3_channels_tab[hdr->acmod] + hdr->lfeon;
+    hdr->frame_size = ff_ac3_frame_size_tab[hdr->frmsizecod][hdr->fscod] * 2;
 
     return 0;
 }
@@ -125,11 +125,11 @@ static int ac3_sync(const uint8_t *buf, int *channels, int *sample_rate,
             if(fscod2 == 3)
                 return 0;
 
-            *sample_rate = ff_ac3_freqs[fscod2] / 2;
+            *sample_rate = ff_ac3_sample_rate_tab[fscod2] / 2;
         } else {
             numblkscod = get_bits(&bits, 2);
 
-            *sample_rate = ff_ac3_freqs[fscod];
+            *sample_rate = ff_ac3_sample_rate_tab[fscod];
         }
 
         acmod = get_bits(&bits, 3);
@@ -137,7 +137,7 @@ static int ac3_sync(const uint8_t *buf, int *channels, int *sample_rate,
 
         *samples = eac3_blocks[numblkscod] * 256;
         *bit_rate = frmsiz * (*sample_rate) * 16 / (*samples);
-        *channels = ff_ac3_channels[acmod] + lfeon;
+        *channels = ff_ac3_channels_tab[acmod] + lfeon;
 
         return frmsiz * 2;
     }

libavcodec/ac3dec.c

@@ -947,11 +947,11 @@ static int ac3_parse_audio_block(AC3DecodeContext *ctx, int blk)
 
     /* bit allocation information */
     if (get_bits1(gb)) {
-        ctx->bit_alloc_params.sdecay = ff_sdecaytab[get_bits(gb, 2)] >> ctx->bit_alloc_params.halfratecod;
-        ctx->bit_alloc_params.fdecay = ff_fdecaytab[get_bits(gb, 2)] >> ctx->bit_alloc_params.halfratecod;
-        ctx->bit_alloc_params.sgain  = ff_sgaintab[get_bits(gb, 2)];
-        ctx->bit_alloc_params.dbknee = ff_dbkneetab[get_bits(gb, 2)];
-        ctx->bit_alloc_params.floor  = ff_floortab[get_bits(gb, 3)];
+        ctx->bit_alloc_params.sdecay = ff_ac3_slow_decay_tab[get_bits(gb, 2)] >> ctx->bit_alloc_params.halfratecod;
+        ctx->bit_alloc_params.fdecay = ff_ac3_fast_decay_tab[get_bits(gb, 2)] >> ctx->bit_alloc_params.halfratecod;
+        ctx->bit_alloc_params.sgain  = ff_ac3_slow_gain_tab[get_bits(gb, 2)];
+        ctx->bit_alloc_params.dbknee = ff_ac3_db_per_bit_tab[get_bits(gb, 2)];
+        ctx->bit_alloc_params.floor  = ff_ac3_floor_tab[get_bits(gb, 3)];
         for(ch=!ctx->cplinu; ch<=ctx->nchans; ch++) {
             bit_alloc_stages[ch] = FFMAX(bit_alloc_stages[ch], 2);
         }
@@ -963,7 +963,7 @@ static int ac3_parse_audio_block(AC3DecodeContext *ctx, int blk)
         csnr = (get_bits(gb, 6) - 15) << 4;
         for (ch = !ctx->cplinu; ch <= ctx->nchans; ch++) { /* snr offset and fast gain */
             ctx->snroffst[ch] = (csnr + get_bits(gb, 4)) << 2;
-            ctx->fgain[ch] = ff_fgaintab[get_bits(gb, 3)];
+            ctx->fgain[ch] = ff_ac3_fast_gain_tab[get_bits(gb, 3)];
         }
         memset(bit_alloc_stages, 3, AC3_MAX_CHANNELS);
     }

libavcodec/ac3enc.c

@@ -451,7 +451,7 @@ static void bit_alloc_masking(AC3EncodeContext *s,
                                           psd[blk][ch], bndpsd[blk][ch]);
                 ff_ac3_bit_alloc_calc_mask(&s->bit_alloc, bndpsd[blk][ch],
                                            0, s->nb_coefs[ch],
-                                           ff_fgaintab[s->fgaincod[ch]],
+                                           ff_ac3_fast_gain_tab[s->fgaincod[ch]],
                                            ch == s->lfe_channel,
                                            DBA_NONE, 0, NULL, NULL, NULL,
                                            mask[blk][ch]);
@@ -519,11 +519,11 @@ static int compute_bit_allocation(AC3EncodeContext *s,
     /* compute real values */
     s->bit_alloc.fscod = s->fscod;
     s->bit_alloc.halfratecod = s->halfratecod;
-    s->bit_alloc.sdecay = ff_sdecaytab[s->sdecaycod] >> s->halfratecod;
-    s->bit_alloc.fdecay = ff_fdecaytab[s->fdecaycod] >> s->halfratecod;
-    s->bit_alloc.sgain = ff_sgaintab[s->sgaincod];
-    s->bit_alloc.dbknee = ff_dbkneetab[s->dbkneecod];
-    s->bit_alloc.floor = ff_floortab[s->floorcod];
+    s->bit_alloc.sdecay = ff_ac3_slow_decay_tab[s->sdecaycod] >> s->halfratecod;
+    s->bit_alloc.fdecay = ff_ac3_fast_decay_tab[s->fdecaycod] >> s->halfratecod;
+    s->bit_alloc.sgain = ff_ac3_slow_gain_tab[s->sgaincod];
+    s->bit_alloc.dbknee = ff_ac3_db_per_bit_tab[s->dbkneecod];
+    s->bit_alloc.floor = ff_ac3_floor_tab[s->floorcod];
 
     /* header size */
     frame_bits += 65;
@@ -657,7 +657,7 @@ static int AC3_encode_init(AVCodecContext *avctx)
     /* frequency */
     for(i=0;i<3;i++) {
         for(j=0;j<3;j++)
-            if ((ff_ac3_freqs[j] >> i) == freq)
+            if ((ff_ac3_sample_rate_tab[j] >> i) == freq)
                 goto found;
     }
     return -1;
@@ -671,14 +671,14 @@ static int AC3_encode_init(AVCodecContext *avctx)
     /* bitrate & frame size */
     bitrate /= 1000;
     for(i=0;i<19;i++) {
-        if ((ff_ac3_bitratetab[i] >> s->halfratecod) == bitrate)
+        if ((ff_ac3_bitrate_tab[i] >> s->halfratecod) == bitrate)
             break;
     }
     if (i == 19)
         return -1;
     s->bit_rate = bitrate;
     s->frmsizecod = i << 1;
-    s->frame_size_min = ff_ac3_frame_sizes[s->frmsizecod][s->fscod];
+    s->frame_size_min = ff_ac3_frame_size_tab[s->frmsizecod][s->fscod];
     s->bits_written = 0;
     s->samples_written = 0;
     s->frame_size = s->frame_size_min;

libavcodec/ac3tab.c

@@ -30,7 +30,7 @@
  * Possible frame sizes.
  * from ATSC A/52 Table 5.18 Frame Size Code Table.
  */
-const uint16_t ff_ac3_frame_sizes[38][3] = {
+const uint16_t ff_ac3_frame_size_tab[38][3] = {
     { 64,   69,   96   },
     { 64,   70,   96   },
     { 80,   87,   120  },
@@ -75,15 +75,15 @@ const uint16_t ff_ac3_frame_sizes[38][3] = {
  * Maps audio coding mode (acmod) to number of full-bandwidth channels.
  * from ATSC A/52 Table 5.8 Audio Coding Mode
  */
-const uint8_t ff_ac3_channels[8] = {
+const uint8_t ff_ac3_channels_tab[8] = {
     2, 1, 2, 3, 3, 4, 4, 5
 };
 
 /* possible frequencies */
-const uint16_t ff_ac3_freqs[3] = { 48000, 44100, 32000 };
+const uint16_t ff_ac3_sample_rate_tab[3] = { 48000, 44100, 32000 };
 
 /* possible bitrates */
-const uint16_t ff_ac3_bitratetab[19] = {
+const uint16_t ff_ac3_bitrate_tab[19] = {
     32, 40, 48, 56, 64, 80, 96, 112, 128,
     160, 192, 224, 256, 320, 384, 448, 512, 576, 640
 };
@@ -126,7 +126,7 @@ const int16_t ff_ac3_window[256] = {
 32767,32767,32767,32767,32767,32767,32767,32767,
 };
 
-const uint8_t ff_ac3_latab[260]= {
+const uint8_t ff_ac3_log_add_tab[260]= {
 0x40,0x3f,0x3e,0x3d,0x3c,0x3b,0x3a,0x39,0x38,0x37,
 0x36,0x35,0x34,0x34,0x33,0x32,0x31,0x30,0x2f,0x2f,
 0x2e,0x2d,0x2c,0x2c,0x2b,0x2a,0x29,0x29,0x28,0x27,
@@ -155,7 +155,7 @@ const uint8_t ff_ac3_latab[260]= {
 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 };
 
-const uint16_t ff_ac3_hth[50][3]= {
+const uint16_t ff_ac3_hearing_threshold_tab[50][3]= {
 { 0x04d0,0x04f0,0x0580 },
 { 0x04d0,0x04f0,0x0580 },
 { 0x0440,0x0460,0x04b0 },
@@ -208,7 +208,7 @@ const uint16_t ff_ac3_hth[50][3]= {
 { 0x0840,0x0840,0x04e0 },
 };
 
-const uint8_t ff_ac3_baptab[64]= {
+const uint8_t ff_ac3_bap_tab[64]= {
     0, 1, 1, 1, 1, 1, 2, 2, 3, 3,
     3, 4, 4, 5, 5, 6, 6, 6, 6, 7,
     7, 7, 7, 8, 8, 8, 8, 9, 9, 9,
@@ -218,31 +218,31 @@ const uint8_t ff_ac3_baptab[64]= {
     15, 15, 15, 15,
 };
 
-const uint8_t ff_sdecaytab[4]={
+const uint8_t ff_ac3_slow_decay_tab[4]={
     0x0f, 0x11, 0x13, 0x15,
 };
 
-const uint8_t ff_fdecaytab[4]={
+const uint8_t ff_ac3_fast_decay_tab[4]={
     0x3f, 0x53, 0x67, 0x7b,
 };
 
-const uint16_t ff_sgaintab[4]= {
+const uint16_t ff_ac3_slow_gain_tab[4]= {
     0x540, 0x4d8, 0x478, 0x410,
 };
 
-const uint16_t ff_dbkneetab[4]= {
+const uint16_t ff_ac3_db_per_bit_tab[4]= {
     0x000, 0x700, 0x900, 0xb00,
 };
 
-const int16_t ff_floortab[8]= {
+const int16_t ff_ac3_floor_tab[8]= {
     0x2f0, 0x2b0, 0x270, 0x230, 0x1f0, 0x170, 0x0f0, 0xf800,
 };
 
-const uint16_t ff_fgaintab[8]= {
+const uint16_t ff_ac3_fast_gain_tab[8]= {
     0x080, 0x100, 0x180, 0x200, 0x280, 0x300, 0x380, 0x400,
 };
 
-const uint8_t ff_ac3_bndsz[50]={
+const uint8_t ff_ac3_critical_band_size_tab[50]={
     1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
     1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 3, 3, 3, 3, 3, 3,
     3, 6, 6, 6, 6, 6, 6, 12, 12, 12, 12, 24, 24, 24, 24, 24

libavcodec/ac3tab.h

@@ -24,20 +24,20 @@
 
 #include "common.h"
 
-extern const uint16_t ff_ac3_frame_sizes[38][3];
-extern const uint8_t  ff_ac3_channels[8];
-extern const uint16_t ff_ac3_freqs[3];
-extern const uint16_t ff_ac3_bitratetab[19];
+extern const uint16_t ff_ac3_frame_size_tab[38][3];
+extern const uint8_t  ff_ac3_channels_tab[8];
+extern const uint16_t ff_ac3_sample_rate_tab[3];
+extern const uint16_t ff_ac3_bitrate_tab[19];
 extern const int16_t  ff_ac3_window[256];
-extern const uint8_t  ff_ac3_latab[260];
-extern const uint16_t ff_ac3_hth[50][3];
-extern const uint8_t  ff_ac3_baptab[64];
-extern const uint8_t  ff_sdecaytab[4];
-extern const uint8_t  ff_fdecaytab[4];
-extern const uint16_t ff_sgaintab[4];
-extern const uint16_t ff_dbkneetab[4];
-extern const int16_t  ff_floortab[8];
-extern const uint16_t ff_fgaintab[8];
-extern const uint8_t  ff_ac3_bndsz[50];
+extern const uint8_t  ff_ac3_log_add_tab[260];
+extern const uint16_t ff_ac3_hearing_threshold_tab[50][3];
+extern const uint8_t  ff_ac3_bap_tab[64];
+extern const uint8_t  ff_ac3_slow_decay_tab[4];
+extern const uint8_t  ff_ac3_fast_decay_tab[4];
+extern const uint16_t ff_ac3_slow_gain_tab[4];
+extern const uint16_t ff_ac3_db_per_bit_tab[4];
+extern const int16_t  ff_ac3_floor_tab[8];
+extern const uint16_t ff_ac3_fast_gain_tab[8];
+extern const uint8_t  ff_ac3_critical_band_size_tab[50];
 
 #endif /* FFMPEG_AC3TAB_H */