Bit accounting.
This patch adds bit account infrastructure to the bit reader API.
When configured with --enable-accounting, every bit reader API
function records the number of bits necessary to decoding a symbol.
Accounting symbol entries are collected in global accounting data
structure, that can be used to understand exactly where bits are
spent (http://aomanalyzer.org). The data structure is cleared and
reused each frame to reduce memory usage. When configured without
--enable-accounting, bit accounting does not incur any runtime
overhead.
All aom_read_xxx functions now have an additional string parameter
that specifies the symbol name. By default, the ACCT_STR macro is
used (which expands to __func__). For more precise accounting,
these should be replaced with more descriptive names.
Change-Id: Ia2e1343cb842c9391b12b77272587dfbe307a56d
diff --git a/av1/decoder/dsubexp.h b/av1/decoder/dsubexp.h
index c0d372a..60aa7df 100644
--- a/av1/decoder/dsubexp.h
+++ b/av1/decoder/dsubexp.h
@@ -18,15 +18,22 @@
extern "C" {
#endif
-void av1_diff_update_prob(aom_reader *r, aom_prob *p);
+#if CONFIG_ACCOUNTING
+#define av1_diff_update_prob(r, p, str) av1_diff_update_prob_(r, p, str)
+#else
+#define av1_diff_update_prob(r, p, str) av1_diff_update_prob_(r, p)
+#endif
+
+void av1_diff_update_prob_(aom_reader *r, aom_prob *p ACCT_STR_PARAM);
#ifdef __cplusplus
} // extern "C"
#endif
-
+#if CONFIG_GLOBAL_MOTION
// mag_bits is number of bits for magnitude. The alphabet is of size
// 2 * 2^mag_bits + 1, symmetric around 0, where one bit is used to
// indicate 0 or non-zero, mag_bits bits are used to indicate magnitide
// and 1 more bit for the sign if non-zero.
int aom_read_primitive_symmetric(aom_reader *r, unsigned int mag_bits);
+#endif // CONFIG_GLOBAL_MOTION
#endif // AV1_DECODER_DSUBEXP_H_
