Move TNS and swb_offset tables from aacdectab.h to aactab.c so that they can be

shared with the AAC encoder.

Originally committed as revision 19174 to svn://svn.ffmpeg.org/ffmpeg/trunk

1 files changed, 140 insertions, 0 deletions

diff --git a/libavcodec/aactab.c b/libavcodec/aactab.c
index b14b395..8d7fa62 100644
--- a/libavcodec/aactab.c
+++ b/libavcodec/aactab.c
@@ -899,6 +899,146 @@ const float * const ff_aac_codebook_vectors[] = {
     codebook_vector8, codebook_vector10,
 };
 
+/* @name swb_offsets
+ * Sample offset into the window indicating the beginning of a scalefactor
+ * window band
+ *
+ * scalefactor window band - term for scalefactor bands within a window,
+ * given in Table 4.110 to Table 4.128.
+ *
+ * scalefactor band - a set of spectral coefficients which are scaled by one
+ * scalefactor. In case of EIGHT_SHORT_SEQUENCE and grouping a scalefactor band
+ * may contain several scalefactor window bands of corresponding frequency. For
+ * all other window_sequences scalefactor bands and scalefactor window bands are
+ * identical.
+ * @{
+ */
+
+static const uint16_t swb_offset_1024_96[] = {
+      0,   4,   8,  12,  16,  20,  24,  28,
+     32,  36,  40,  44,  48,  52,  56,  64,
+     72,  80,  88,  96, 108, 120, 132, 144,
+    156, 172, 188, 212, 240, 276, 320, 384,
+    448, 512, 576, 640, 704, 768, 832, 896,
+    960, 1024
+};
+
+static const uint16_t swb_offset_128_96[] = {
+    0, 4, 8, 12, 16, 20, 24, 32, 40, 48, 64, 92, 128
+};
+
+static const uint16_t swb_offset_1024_64[] = {
+      0,   4,   8,  12,  16,  20,  24,  28,
+     32,  36,  40,  44,  48,  52,  56,  64,
+     72,  80,  88, 100, 112, 124, 140, 156,
+    172, 192, 216, 240, 268, 304, 344, 384,
+    424, 464, 504, 544, 584, 624, 664, 704,
+    744, 784, 824, 864, 904, 944, 984, 1024
+};
+
+static const uint16_t swb_offset_1024_48[] = {
+      0,   4,   8,  12,  16,  20,  24,  28,
+     32,  36,  40,  48,  56,  64,  72,  80,
+     88,  96, 108, 120, 132, 144, 160, 176,
+    196, 216, 240, 264, 292, 320, 352, 384,
+    416, 448, 480, 512, 544, 576, 608, 640,
+    672, 704, 736, 768, 800, 832, 864, 896,
+    928, 1024
+};
+
+static const uint16_t swb_offset_128_48[] = {
+     0,   4,   8,  12,  16,  20,  28,  36,
+    44,  56,  68,  80,  96, 112, 128
+};
+
+static const uint16_t swb_offset_1024_32[] = {
+      0,   4,   8,  12,  16,  20,  24,  28,
+     32,  36,  40,  48,  56,  64,  72,  80,
+     88,  96, 108, 120, 132, 144, 160, 176,
+    196, 216, 240, 264, 292, 320, 352, 384,
+    416, 448, 480, 512, 544, 576, 608, 640,
+    672, 704, 736, 768, 800, 832, 864, 896,
+    928, 960, 992, 1024
+};
+
+static const uint16_t swb_offset_1024_24[] = {
+      0,   4,   8,  12,  16,  20,  24,  28,
+     32,  36,  40,  44,  52,  60,  68,  76,
+     84,  92, 100, 108, 116, 124, 136, 148,
+    160, 172, 188, 204, 220, 240, 260, 284,
+    308, 336, 364, 396, 432, 468, 508, 552,
+    600, 652, 704, 768, 832, 896, 960, 1024
+};
+
+static const uint16_t swb_offset_128_24[] = {
+     0,   4,   8,  12,  16,  20,  24,  28,
+    36,  44,  52,  64,  76,  92, 108, 128
+};
+
+static const uint16_t swb_offset_1024_16[] = {
+      0,   8,  16,  24,  32,  40,  48,  56,
+     64,  72,  80,  88, 100, 112, 124, 136,
+    148, 160, 172, 184, 196, 212, 228, 244,
+    260, 280, 300, 320, 344, 368, 396, 424,
+    456, 492, 532, 572, 616, 664, 716, 772,
+    832, 896, 960, 1024
+};
+
+static const uint16_t swb_offset_128_16[] = {
+     0,   4,   8,  12,  16,  20,  24,  28,
+    32,  40,  48,  60,  72,  88, 108, 128
+};
+
+static const uint16_t swb_offset_1024_8[] = {
+      0,  12,  24,  36,  48,  60,  72,  84,
+     96, 108, 120, 132, 144, 156, 172, 188,
+    204, 220, 236, 252, 268, 288, 308, 328,
+    348, 372, 396, 420, 448, 476, 508, 544,
+    580, 620, 664, 712, 764, 820, 880, 944,
+    1024
+};
+
+static const uint16_t swb_offset_128_8[] = {
+     0,   4,   8,  12,  16,  20,  24,  28,
+    36,  44,  52,  60,  72,  88, 108, 128
+};
+
+const uint16_t *ff_swb_offset_1024[] = {
+    swb_offset_1024_96, swb_offset_1024_96, swb_offset_1024_64,
+    swb_offset_1024_48, swb_offset_1024_48, swb_offset_1024_32,
+    swb_offset_1024_24, swb_offset_1024_24, swb_offset_1024_16,
+    swb_offset_1024_16, swb_offset_1024_16, swb_offset_1024_8,
+    swb_offset_1024_8
+};
+
+const uint16_t *ff_swb_offset_128[] = {
+    /* The last entry on the following row is swb_offset_128_64 but is a
+       duplicate of swb_offset_128_96. */
+    swb_offset_128_96, swb_offset_128_96, swb_offset_128_96,
+    swb_offset_128_48, swb_offset_128_48, swb_offset_128_48,
+    swb_offset_128_24, swb_offset_128_24, swb_offset_128_16,
+    swb_offset_128_16, swb_offset_128_16, swb_offset_128_8,
+    swb_offset_128_8
+};
+
+// @}
+
+/* @name ff_tns_max_bands
+ * The maximum number of scalefactor bands on which TNS can operate for the long
+ * and short transforms respectively. The index to these tables is related to
+ * the sample rate of the audio.
+ * @{
+ */
+const uint8_t ff_tns_max_bands_1024[] = {
+    31, 31, 34, 40, 42, 51, 46, 46, 42, 42, 42, 39, 39
+};
+
+const uint8_t ff_tns_max_bands_128[] = {
+    9, 9, 10, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14
+};
+// @}
+
+
 #if CONFIG_HARDCODED_TABLES
 
 /**