Change the default dB-per-bit code from 2 to 3.

This gives slightly better quality in PEAQ tests.
Code 3 gives a dBpb value of 2816 = -132dB (128 psd units = -6dB), which
corresponds to 22 bits. Since the exponents have an offset applied, the
16-bit source looks like 24-bit source to the bit allocation routine.
So using dBpb code=3 is a closer match to the exponent range.

Regression test refs updated for acodec-ac3, lavf-rm, and seek-ac3_rm.

Originally committed as revision 26144 to svn://svn.ffmpeg.org/ffmpeg/trunk

4 files changed, 19 insertions, 20 deletions

diff --git a/libavcodec/ac3enc.c b/libavcodec/ac3enc.c
index 94fafbc314..52cb58fa2b 100644
--- a/libavcodec/ac3enc.c
+++ b/libavcodec/ac3enc.c
@@ -899,7 +899,7 @@ static void bit_alloc_init(AC3EncodeContext *s)
     s->slow_decay_code = 2;
     s->fast_decay_code = 1;
     s->slow_gain_code  = 1;
-    s->db_per_bit_code = 2;
+    s->db_per_bit_code = 3;
     s->floor_code      = 4;
     for (ch = 0; ch < s->channels; ch++)
         s->fast_gain_code[ch] = 4;
diff --git a/tests/ref/acodec/ac3 b/tests/ref/acodec/ac3
index 3a673fca0f..3ca8219e63 100644
--- a/tests/ref/acodec/ac3
+++ b/tests/ref/acodec/ac3
@@ -1,2 +1,2 @@
-8ea1ce311247d27dc653f274ed7104cd *./tests/data/acodec/ac3.rm
+b315176b519a63a35cb91566e768f62b *./tests/data/acodec/ac3.rm
 98751 ./tests/data/acodec/ac3.rm
diff --git a/tests/ref/lavf/rm b/tests/ref/lavf/rm
index bdb16e8e2e..d9ec51e596 100644
--- a/tests/ref/lavf/rm
+++ b/tests/ref/lavf/rm
@@ -1,2 +1,2 @@
-03427369521c9ebc2a5408a0e2a163bf *./tests/data/lavf/lavf.rm
+e1990def7b195a568340f2c1a89d6587 *./tests/data/lavf/lavf.rm
 346706 ./tests/data/lavf/lavf.rm
diff --git a/tests/ref/seek/ac3_rm b/tests/ref/seek/ac3_rm
index 86a0f757ed..6d47c47281 100644
--- a/tests/ref/seek/ac3_rm
+++ b/tests/ref/seek/ac3_rm
@@ -1,43 +1,42 @@
 ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:    271 size:   556
 ret: 0         st:-1 flags:0  ts:-1.000000
 ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:    271 size:   556
-ret: 0         st:-1 flags:1  ts: 1.894167
-ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:    271 size:   556
+ret:-1         st:-1 flags:1  ts: 1.894167
 ret:-1         st: 0 flags:0  ts: 0.788000
 ret: 0         st: 0 flags:1  ts:-0.317000
 ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:    271 size:   556
 ret: 0         st:-1 flags:0  ts: 2.576668
-ret: 0         st: 0 flags:1 dts: 2.960000 pts: 2.960000 pos:  48659 size:   558
+ret: 0         st: 0 flags:1 dts: 4.179000 pts: 4.179000 pos:  68585 size:   556
 ret:-1         st:-1 flags:1  ts: 1.470835
-ret:-1         st: 0 flags:0  ts: 0.365000
+ret: 0         st: 0 flags:0  ts: 0.365000
+ret: 0         st: 0 flags:1 dts: 0.383000 pts: 0.383000 pos:   6533 size:   558
 ret: 0         st: 0 flags:1  ts:-0.741000
 ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:    271 size:   556
-ret: 0         st:-1 flags:0  ts: 2.153336
-ret: 0         st: 0 flags:1 dts: 2.960000 pts: 2.960000 pos:  48659 size:   558
+ret:-1         st:-1 flags:0  ts: 2.153336
 ret:-1         st:-1 flags:1  ts: 1.047503
 ret: 0         st: 0 flags:0  ts:-0.058000
 ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:    271 size:   556
-ret: 0         st: 0 flags:1  ts: 2.836000
-ret: 0         st: 0 flags:1 dts: 2.333000 pts: 2.333000 pos:  38413 size:   556
+ret:-1         st: 0 flags:1  ts: 2.836000
 ret:-1         st:-1 flags:0  ts: 1.730004
 ret: 0         st:-1 flags:1  ts: 0.624171
-ret: 0         st: 0 flags:1 dts: 0.417000 pts: 0.417000 pos:   7103 size:   556
+ret: 0         st: 0 flags:1 dts: 0.452000 pts: 0.452000 pos:   7671 size:   558
 ret: 0         st: 0 flags:0  ts:-0.482000
 ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:    271 size:   556
-ret:-1         st: 0 flags:1  ts: 2.413000
+ret: 0         st: 0 flags:1  ts: 2.413000
+ret: 0         st: 0 flags:1 dts: 2.333000 pts: 2.333000 pos:  38413 size:   556
 ret:-1         st:-1 flags:0  ts: 1.306672
-ret: 0         st:-1 flags:1  ts: 0.200839
-ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:    271 size:   556
+ret:-1         st:-1 flags:1  ts: 0.200839
 ret: 0         st: 0 flags:0  ts:-0.905000
 ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:    271 size:   556
 ret: 0         st: 0 flags:1  ts: 1.989000
-ret: 0         st: 0 flags:1 dts: 1.950000 pts: 1.950000 pos:  32151 size:   556
-ret: 0         st:-1 flags:0  ts: 0.883340
-ret: 0         st: 0 flags:1 dts: 2.159000 pts: 2.159000 pos:  35567 size:   556
+ret: 0         st: 0 flags:1 dts: 1.985000 pts: 1.985000 pos:  32719 size:   558
+ret:-1         st:-1 flags:0  ts: 0.883340
 ret: 0         st:-1 flags:1  ts:-0.222493
 ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:    271 size:   556
-ret:-1         st: 0 flags:0  ts: 2.672000
+ret: 0         st: 0 flags:0  ts: 2.672000
+ret: 0         st: 0 flags:1 dts: 4.179000 pts: 4.179000 pos:  68585 size:   556
 ret:-1         st: 0 flags:1  ts: 1.566000
-ret:-1         st:-1 flags:0  ts: 0.460008
+ret: 0         st:-1 flags:0  ts: 0.460008
+ret: 0         st: 0 flags:1 dts: 4.179000 pts: 4.179000 pos:  68585 size:   556
 ret: 0         st:-1 flags:1  ts:-0.645825
 ret: 0         st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos:    271 size:   556