Use Opus for VoIP

Server/client VoIP protocol is handled by adding new cvars
cl_voipProtocol and sv_voipProtocol, sv_voip and cl_voip
are used to auto set/clear them. All users need to touch
are cl/sv_voip as 0 or 1 just like before.

Old Speex VoIP packets in demos are skipped.
New VoIP packets are skipped in demos if sv_voipProtocol
doesn't match cl_voipProtocol.

Notable difference between usage of speex and opus codecs,
when using Speex client would be sent 80ms at a time.
Using Opus, 60ms is sent at a time. This was changed because
the Opus codec supports encoding up to 60ms at a time.
(Simpler to send only one codec frame in a packet.)

1 files changed, 11 insertions, 65 deletions

diff --git a/Makefile b/Makefile
index c1a5b29e..99c184b5 100644
--- a/Makefile
+++ b/Makefile
@@ -188,10 +188,6 @@ ifndef USE_INTERNAL_LIBS
 USE_INTERNAL_LIBS=1
 endif
 
-ifndef USE_INTERNAL_SPEEX
-USE_INTERNAL_SPEEX=$(USE_INTERNAL_LIBS)
-endif
-
 ifndef USE_INTERNAL_OGG
 USE_INTERNAL_OGG=$(USE_INTERNAL_LIBS)
 endif
@@ -246,7 +242,6 @@ CGDIR=$(MOUNT_DIR)/cgame
 NDIR=$(MOUNT_DIR)/null
 UIDIR=$(MOUNT_DIR)/ui
 JPDIR=$(MOUNT_DIR)/jpeg-8c
-SPEEXDIR=$(MOUNT_DIR)/libspeex
 OGGDIR=$(MOUNT_DIR)/libogg-1.3.1
 VORBISDIR=$(MOUNT_DIR)/libvorbis-1.3.4
 OPUSDIR=$(MOUNT_DIR)/opus-1.1
@@ -962,8 +957,18 @@ ifeq ($(USE_CURL),1)
   endif
 endif
 
+ifeq ($(USE_VOIP),1)
+  CLIENT_CFLAGS += -DUSE_VOIP
+  SERVER_CFLAGS += -DUSE_VOIP
+  NEED_OPUS=1
+endif
+
 ifeq ($(USE_CODEC_OPUS),1)
   CLIENT_CFLAGS += -DUSE_CODEC_OPUS
+  NEED_OPUS=1
+endif
+
+ifeq ($(NEED_OPUS),1)
   ifeq ($(USE_INTERNAL_OPUS),1)
     OPUS_CFLAGS = -DOPUS_BUILD -DHAVE_LRINTF -DFLOATING_POINT -DUSE_ALLOCA \
       -I$(OPUSDIR)/include -I$(OPUSDIR)/celt -I$(OPUSDIR)/silk \
@@ -1009,19 +1014,6 @@ ifeq ($(USE_MUMBLE),1)
   CLIENT_CFLAGS += -DUSE_MUMBLE
 endif
 
-ifeq ($(USE_VOIP),1)
-  CLIENT_CFLAGS += -DUSE_VOIP
-  SERVER_CFLAGS += -DUSE_VOIP
-  ifeq ($(USE_INTERNAL_SPEEX),1)
-    SPEEX_CFLAGS += -DFLOATING_POINT -DUSE_ALLOCA -I$(SPEEXDIR)/include
-  else
-    SPEEX_CFLAGS ?= $(shell pkg-config --silence-errors --cflags speex speexdsp || true)
-    SPEEX_LIBS ?= $(shell pkg-config --silence-errors --libs speex speexdsp || echo -lspeex -lspeexdsp)
-  endif
-  CLIENT_CFLAGS += $(SPEEX_CFLAGS)
-  CLIENT_LIBS += $(SPEEX_LIBS)
-endif
-
 ifeq ($(USE_INTERNAL_ZLIB),1)
   ZLIB_CFLAGS = -DNO_GZIP -I$(ZDIR)
 else
@@ -1722,53 +1714,7 @@ ifeq ($(ARCH),x86_64)
     $(B)/client/ftola.o
 endif
 
-ifeq ($(USE_VOIP),1)
-ifeq ($(USE_INTERNAL_SPEEX),1)
-Q3OBJ += \
-  $(B)/client/bits.o \
-  $(B)/client/buffer.o \
-  $(B)/client/cb_search.o \
-  $(B)/client/exc_10_16_table.o \
-  $(B)/client/exc_10_32_table.o \
-  $(B)/client/exc_20_32_table.o \
-  $(B)/client/exc_5_256_table.o \
-  $(B)/client/exc_5_64_table.o \
-  $(B)/client/exc_8_128_table.o \
-  $(B)/client/fftwrap.o \
-  $(B)/client/filterbank.o \
-  $(B)/client/filters.o \
-  $(B)/client/gain_table.o \
-  $(B)/client/gain_table_lbr.o \
-  $(B)/client/hexc_10_32_table.o \
-  $(B)/client/hexc_table.o \
-  $(B)/client/high_lsp_tables.o \
-  $(B)/client/jitter.o \
-  $(B)/client/kiss_fft.o \
-  $(B)/client/kiss_fftr.o \
-  $(B)/client/lpc.o \
-  $(B)/client/lsp.o \
-  $(B)/client/lsp_tables_nb.o \
-  $(B)/client/ltp.o \
-  $(B)/client/mdf.o \
-  $(B)/client/modes.o \
-  $(B)/client/modes_wb.o \
-  $(B)/client/nb_celp.o \
-  $(B)/client/preprocess.o \
-  $(B)/client/quant_lsp.o \
-  $(B)/client/resample.o \
-  $(B)/client/sb_celp.o \
-  $(B)/client/smallft.o \
-  $(B)/client/speex.o \
-  $(B)/client/speex_callbacks.o \
-  $(B)/client/speex_header.o \
-  $(B)/client/stereo.o \
-  $(B)/client/vbr.o \
-  $(B)/client/vq.o \
-  $(B)/client/window.o
-endif
-endif
-
-ifeq ($(USE_CODEC_OPUS),1)
+ifeq ($(NEED_OPUS),1)
 ifeq ($(USE_INTERNAL_OPUS),1)
 Q3OBJ += \
   $(B)/client/opus/analysis.o \