GN: Implement voice engine, common audio, audio coding and audio processing

NOTICE: Assembly offsets generation for audio processing will
not be ported to GN and the process of removing them is tracked
in https://code.google.com/p/webrtc/issues/detail?id=3580.

The GN files are based upon the GYP files as of r7009.

BUG=3441
TESTED=Passing builds with:
gn gen out/Default --args="build_with_chromium=false" && ninja -C out/Default
gn gen out/Default --args="build_with_chromium=false is_debug=true" && ninja -C out/Default
gn gen out/Default --args="build_with_chromium=false aec_debug_dump=true" && ninja -C out/Default
gn gen out/Default --args="build_with_chromium=false aec_untrusted_delay_for_testing=true" && ninja -C out/Default
gn gen out/Default --args="build_with_chromium=false prefer_fixed_point=true" && ninja -C out/Default
gn gen out/Default --args="build_with_chromium=false os=\"android\" cpu_arch=\"arm\" is_clang=false" && ninja -C out/Default
gn gen out/Default --args="build_with_chromium=false os=\"android\" cpu_arch=\"arm\" arm_version=7 is_clang=false" && ninja -C out/Default

I don't know how to setup the mips toolchain to test the following, but it's out of scope for the GN effort for now:
gn gen out/Default --args="build_with_chromium=false cpu_arch=\"mipsel\" mips_dsp_rev=0" && ninja -C out/Default
gn gen out/Default --args="build_with_chromium=false cpu_arch=\"mipsel\" mips_dsp_rev=1" && ninja -C out/Default
gn gen out/Default --args="build_with_chromium=false cpu_arch=\"mipsel\" mips_dsp_rev=2" && ninja -C out/Default

Compilation of Chromium's 'all' target with src/third_party/webrtc
symlinked to the WebRTC checkout with this CL applied, both
with the default GN settings and using
--args="is_debug=false os=\"android\" cpu_arch=\"arm\""

R=andrew@webrtc.org, brettw@chromium.org

Review URL: https://webrtc-codereview.appspot.com/15999004

git-svn-id: http://webrtc.googlecode.com/svn/trunk/webrtc@7012 4adac7df-926f-26a2-2b94-8c16560cd09d

8 files changed, 1190 insertions, 10 deletions

diff --git a/build/webrtc.gni b/build/webrtc.gni
index 5b3fe183..cae81664 100644
--- a/build/webrtc.gni
+++ b/build/webrtc.gni
@@ -6,20 +6,22 @@
 # in the file PATENTS.  All contributing project authors may
 # be found in the AUTHORS file in the root of the source tree.
 
+import("//build/config/arm.gni")
+
 declare_args() {
   # Assume Chromium build for now, since that's the priority case for getting GN
   # up and running with WebRTC.
   build_with_chromium = true
   build_with_libjingle = true
 
+  # Disable this to avoid building the Opus audio codec.
+  include_opus = true
+
   # Adds video support to dependencies shared by voice and video engine.
   # This should normally be enabled; the intended use is to disable only
   # when building voice engine exclusively.
   enable_video = true
 
-  # Disable this to not build libvpx and instead use an externally provided lib.
-  build_libvpx = true
-
   # Selects fixed-point code where possible.
   prefer_fixed_point = false
 
@@ -51,6 +53,11 @@ declare_args() {
 
   enable_android_opensl = true
 
+  # Link-Time Optimizations.
+  # Executes code generation at link-time instead of compile-time.
+  # https://gcc.gnu.org/wiki/LinkTimeOptimization
+  use_lto = false
+
   if (build_with_chromium) {
     # Exclude pulse audio on Chromium since its prerequisites don't require
     # pulse audio.
@@ -94,4 +101,9 @@ declare_args() {
   if (cpu_arch == "arm") {
     prefer_fixed_point = true
   }
+
+  # WebRTC builds ARM v7 Neon instruction set optimized code for both iOS and
+  # Android, which is why we currently cannot use the variables in
+  # //build/config/arm.gni (since it disables Neon for Android).
+  build_armv7_neon = (cpu_arch == "arm" && arm_version == 7)
 }
diff --git a/common_audio/BUILD.gn b/common_audio/BUILD.gn
index 4dcc3226..6b5fe9de 100644
--- a/common_audio/BUILD.gn
+++ b/common_audio/BUILD.gn
@@ -9,18 +9,207 @@
 import("//build/config/arm.gni")
 import("../build/webrtc.gni")
 
+config("common_audio_config") {
+  include_dirs = [
+    "resampler/include",
+    "signal_processing/include",
+    "vad/include",
+  ]
+}
+
 source_set("common_audio") {
-  # TODO(andrew): Implement.
+  sources = [
+    "audio_util.cc",
+    "fir_filter.cc",
+    "fir_filter.h",
+    "fir_filter_neon.h",
+    "fir_filter_sse.h",
+    "include/audio_util.h",
+    "resampler/include/push_resampler.h",
+    "resampler/include/resampler.h",
+    "resampler/push_resampler.cc",
+    "resampler/push_sinc_resampler.cc",
+    "resampler/push_sinc_resampler.h",
+    "resampler/resampler.cc",
+    "resampler/sinc_resampler.cc",
+    "resampler/sinc_resampler.h",
+    "signal_processing/include/real_fft.h",
+    "signal_processing/include/signal_processing_library.h",
+    "signal_processing/include/spl_inl.h",
+    "signal_processing/auto_corr_to_refl_coef.c",
+    "signal_processing/auto_correlation.c",
+    "signal_processing/complex_fft_tables.h",
+    "signal_processing/copy_set_operations.c",
+    "signal_processing/cross_correlation.c",
+    "signal_processing/division_operations.c",
+    "signal_processing/dot_product_with_scale.c",
+    "signal_processing/downsample_fast.c",
+    "signal_processing/energy.c",
+    "signal_processing/filter_ar.c",
+    "signal_processing/filter_ma_fast_q12.c",
+    "signal_processing/get_hanning_window.c",
+    "signal_processing/get_scaling_square.c",
+    "signal_processing/ilbc_specific_functions.c",
+    "signal_processing/levinson_durbin.c",
+    "signal_processing/lpc_to_refl_coef.c",
+    "signal_processing/min_max_operations.c",
+    "signal_processing/randomization_functions.c",
+    "signal_processing/refl_coef_to_lpc.c",
+    "signal_processing/real_fft.c",
+    "signal_processing/resample.c",
+    "signal_processing/resample_48khz.c",
+    "signal_processing/resample_by_2.c",
+    "signal_processing/resample_by_2_internal.c",
+    "signal_processing/resample_by_2_internal.h",
+    "signal_processing/resample_fractional.c",
+    "signal_processing/spl_init.c",
+    "signal_processing/spl_sqrt.c",
+    "signal_processing/spl_version.c",
+    "signal_processing/splitting_filter.c",
+    "signal_processing/sqrt_of_one_minus_x_squared.c",
+    "signal_processing/vector_scaling_operations.c",
+    "vad/include/webrtc_vad.h",
+    "vad/webrtc_vad.c",
+    "vad/vad_core.c",
+    "vad/vad_core.h",
+    "vad/vad_filterbank.c",
+    "vad/vad_filterbank.h",
+    "vad/vad_gmm.c",
+    "vad/vad_gmm.h",
+    "vad/vad_sp.c",
+    "vad/vad_sp.h",
+    "wav_header.cc",
+    "wav_header.h",
+    "wav_writer.cc",
+    "wav_writer.h",
+  ]
+
+  deps = [ "../system_wrappers" ]
+
+  if (cpu_arch == "arm") {
+    sources += [
+      "signal_processing/complex_bit_reverse_arm.S",
+      "signal_processing/spl_sqrt_floor_arm.S",
+    ]
+
+    if (arm_version == 7) {
+      deps += [ ":common_audio_neon" ]
+      sources += [ "signal_processing/filter_ar_fast_q12_armv7.S" ]
+    } else {
+      sources += [ "signal_processing/filter_ar_fast_q12.c" ]
+    }
+  }
+
+  if (cpu_arch == "mipsel") {
+    sources += [
+      "signal_processing/include/spl_inl_mips.h",
+      "signal_processing/complex_bit_reverse_mips.c",
+      "signal_processing/complex_fft_mips.c",
+      "signal_processing/cross_correlation_mips.c",
+      "signal_processing/downsample_fast_mips.c",
+      "signal_processing/filter_ar_fast_q12_mips.c",
+      "signal_processing/min_max_operations_mips.c",
+      "signal_processing/resample_by_2_mips.c",
+      "signal_processing/spl_sqrt_floor_mips.c",
+    ]
+    if (mips_dsp_rev > 0) {
+      sources += [ "signal_processing/vector_scaling_operations_mips.c" ]
+    }
+  } else {
+    sources += [
+      "signal_processing/complex_fft.c",
+      "signal_processing/filter_ar_fast_q12.c",
+    ]
+  }
+
+  if (cpu_arch != "arm" && cpu_arch != "mipsel") {
+    sources += [
+      "signal_processing/complex_bit_reverse.c",
+      "signal_processing/spl_sqrt_floor.c",
+    ]
+  }
+
+  if (is_win) {
+    cflags += [
+      "/wd4334",  # Ignore warning on shift operator promotion.
+    ]
+  }
+
+  direct_dependent_configs = [
+    "..:common_inherited_config",
+    ":common_audio_config",
+  ]
+
+  if (is_clang) {
+    # Suppress warnings from Chrome's Clang plugins.
+    # See http://code.google.com/p/webrtc/issues/detail?id=163 for details.
+    configs -= [ "//build/config/clang:find_bad_constructs" ]
+  }
+
+  if (cpu_arch == "x86" || cpu_arch == "x64") {
+    deps += [ ":common_audio_sse2" ]
+  }
 }
 
 if (cpu_arch == "x86" || cpu_arch == "x64") {
   source_set("common_audio_sse2") {
-    # TODO(andrew): Implement.
+    sources = [
+      "fir_filter_sse.cc",
+      "resampler/sinc_resampler_sse.cc",
+    ]
+
+    cflags = [ "-msse2" ]
+
+    configs += [ "..:common_inherited_config" ]
+
+    if (is_clang) {
+      # Suppress warnings from Chrome's Clang plugins.
+      # See http://code.google.com/p/webrtc/issues/detail?id=163 for details.
+      configs -= [ "//build/config/clang:find_bad_constructs" ]
+    }
   }
 }
 
-if (cpu_arch == "arm" && arm_version == 7) {
+if (build_armv7_neon) {
   source_set("common_audio_neon") {
-    # TODO(andrew): Implement.
+    sources = [
+      "fir_filter_neon.cc",
+      "resampler/sinc_resampler_neon.cc",
+      "signal_processing/cross_correlation_neon.S",
+      "signal_processing/downsample_fast_neon.S",
+      "signal_processing/min_max_operations_neon.S",
+      "signal_processing/vector_scaling_operations_neon.S",
+    ]
+
+    configs += [
+       "..:common_config",
+       "..:common_inherited_config",
+    ]
+
+    # Enable compilation for the ARM v7 Neon instruction set. This is needed
+    # since //build/config/arm.gni only enables Neon for iOS, not Android.
+    # This provides the same functionality as webrtc/build/arm_neon.gypi.
+    # TODO(kjellander): Investigate if this can be moved into webrtc.gni or
+    # //build/config/arm.gni instead, to reduce code duplication.
+    # Remove the -mfpu=vfpv3-d16 cflag.
+    configs -= [ "//build/config/compiler:compiler_arm_fpu" ]
+    cflags = [
+      "-flax-vector-conversions",
+      "-mfpu=neon",
+    ]
+
+    # Disable LTO in audio_processing_neon target due to compiler bug.
+    if (use_lto) {
+      cflags -= [
+        "-flto",
+        "-ffat-lto-objects",
+      ]
+    }
+
+    if (is_clang) {
+      # Suppress warnings from Chrome's Clang plugins.
+      # See http://code.google.com/p/webrtc/issues/detail?id=163 for details.
+      configs -= [ "//build/config/clang:find_bad_constructs" ]
+    }
   }
 }
diff --git a/modules/audio_coding/BUILD.gn b/modules/audio_coding/BUILD.gn
index e4ad4cb3..206445fe 100644
--- a/modules/audio_coding/BUILD.gn
+++ b/modules/audio_coding/BUILD.gn
@@ -6,8 +6,678 @@
 # in the file PATENTS.  All contributing project authors may
 # be found in the AUTHORS file in the root of the source tree.
 
+import("//build/config/arm.gni")
 import("../../build/webrtc.gni")
 
+config("audio_coding_config") {
+  include_dirs = [
+    "main/interface",
+    "../interface",
+  ]
+}
+
 source_set("audio_coding") {
-  # TODO(andrew): Implement.
+  sources = [
+    "main/acm2/acm_amr.cc",
+    "main/acm2/acm_amr.h",
+    "main/acm2/acm_amrwb.cc",
+    "main/acm2/acm_amrwb.h",
+    "main/acm2/acm_celt.cc",
+    "main/acm2/acm_celt.h",
+    "main/acm2/acm_cng.cc",
+    "main/acm2/acm_cng.h",
+    "main/acm2/acm_codec_database.cc",
+    "main/acm2/acm_codec_database.h",
+    "main/acm2/acm_common_defs.h",
+    "main/acm2/acm_dtmf_playout.cc",
+    "main/acm2/acm_dtmf_playout.h",
+    "main/acm2/acm_g722.cc",
+    "main/acm2/acm_g722.h",
+    "main/acm2/acm_g7221.cc",
+    "main/acm2/acm_g7221.h",
+    "main/acm2/acm_g7221c.cc",
+    "main/acm2/acm_g7221c.h",
+    "main/acm2/acm_g729.cc",
+    "main/acm2/acm_g729.h",
+    "main/acm2/acm_g7291.cc",
+    "main/acm2/acm_g7291.h",
+    "main/acm2/acm_generic_codec.cc",
+    "main/acm2/acm_generic_codec.h",
+    "main/acm2/acm_gsmfr.cc",
+    "main/acm2/acm_gsmfr.h",
+    "main/acm2/acm_ilbc.cc",
+    "main/acm2/acm_ilbc.h",
+    "main/acm2/acm_isac.cc",
+    "main/acm2/acm_isac.h",
+    "main/acm2/acm_isac_macros.h",
+    "main/acm2/acm_opus.cc",
+    "main/acm2/acm_opus.h",
+    "main/acm2/acm_speex.cc",
+    "main/acm2/acm_speex.h",
+    "main/acm2/acm_pcm16b.cc",
+    "main/acm2/acm_pcm16b.h",
+    "main/acm2/acm_pcma.cc",
+    "main/acm2/acm_pcma.h",
+    "main/acm2/acm_pcmu.cc",
+    "main/acm2/acm_pcmu.h",
+    "main/acm2/acm_red.cc",
+    "main/acm2/acm_red.h",
+    "main/acm2/acm_receiver.cc",
+    "main/acm2/acm_receiver.h",
+    "main/acm2/acm_resampler.cc",
+    "main/acm2/acm_resampler.h",
+    "main/acm2/audio_coding_module.cc",
+    "main/acm2/audio_coding_module_impl.cc",
+    "main/acm2/audio_coding_module_impl.h",
+    "main/acm2/call_statistics.cc",
+    "main/acm2/call_statistics.h",
+    "main/acm2/initial_delay_manager.cc",
+    "main/acm2/initial_delay_manager.h",
+    "main/acm2/nack.cc",
+    "main/acm2/nack.h",
+    "main/interface/audio_coding_module.h",
+    "main/interface/audio_coding_module_typedefs.h",
+  ]
+
+  defines = []
+
+  direct_dependent_configs = [ ":audio_coding_config" ]
+
+  if (is_clang) {
+    # Suppress warnings from Chrome's Clang plugins.
+    # See http://code.google.com/p/webrtc/issues/detail?id=163 for details.
+    configs -= [ "//build/config/clang:find_bad_constructs" ]
+  }
+
+  deps = [
+    ":cng",
+    ":g711",
+    ":g722",
+    ":ilbc",
+    ":isac",
+    ":isacfix",
+    ":neteq",
+    ":pcm16b",
+    "../../common_audio",
+    "../../system_wrappers",
+  ]
+
+  if (include_opus) {
+    defines += [ "WEBRTC_CODEC_OPUS" ]
+    deps += [ ":webrtc_opus" ]
+  }
+}
+
+config("cng_config") {
+  include_dirs = [
+    "../..",
+    "codecs/cng/include",
+  ]
+}
+
+source_set("cng") {
+  sources = [
+    "codecs/cng/cng_helpfuns.c",
+    "codecs/cng/cng_helpfuns.h",
+    "codecs/cng/include/webrtc_cng.h",
+    "codecs/cng/webrtc_cng.c",
+  ]
+
+  direct_dependent_configs = [ ":cng_config" ]
+
+  deps = [ "../../common_audio" ]
+}
+
+config("g711_config") {
+  include_dirs = [
+    "../..",
+    "codecs/g711/include",
+  ]
+}
+
+source_set("g711") {
+  sources = [
+    "codecs/g711/include/g711_interface.h",
+    "codecs/g711/g711_interface.c",
+    "codecs/g711/g711.c",
+    "codecs/g711/g711.h",
+  ]
+
+  direct_dependent_configs = [ ":g711_config" ]
+}
+
+config("g722_config") {
+  include_dirs = [
+    "../..",
+    "codecs/g722/include",
+  ]
+}
+
+source_set("g722") {
+  sources = [
+    "codecs/g722/include/g722_interface.h",
+    "codecs/g722/g722_interface.c",
+    "codecs/g722/g722_encode.c",
+    "codecs/g722/g722_decode.c",
+    "codecs/g722/g722_enc_dec.h",
+  ]
+
+  direct_dependent_configs = [ ":g722_config" ]
+}
+
+config("ilbc_config") {
+  include_dirs = [
+    "../..",
+    "codecs/ilbc/interface",
+  ]
+}
+
+source_set("ilbc") {
+  sources = [
+    "codecs/ilbc/abs_quant.c",
+    "codecs/ilbc/abs_quant.h",
+    "codecs/ilbc/abs_quant_loop.c",
+    "codecs/ilbc/abs_quant_loop.h",
+    "codecs/ilbc/augmented_cb_corr.c",
+    "codecs/ilbc/augmented_cb_corr.h",
+    "codecs/ilbc/bw_expand.c",
+    "codecs/ilbc/bw_expand.h",
+    "codecs/ilbc/cb_construct.c",
+    "codecs/ilbc/cb_construct.h",
+    "codecs/ilbc/cb_mem_energy_augmentation.c",
+    "codecs/ilbc/cb_mem_energy_augmentation.h",
+    "codecs/ilbc/cb_mem_energy.c",
+    "codecs/ilbc/cb_mem_energy_calc.c",
+    "codecs/ilbc/cb_mem_energy_calc.h",
+    "codecs/ilbc/cb_mem_energy.h",
+    "codecs/ilbc/cb_search.c",
+    "codecs/ilbc/cb_search_core.c",
+    "codecs/ilbc/cb_search_core.h",
+    "codecs/ilbc/cb_search.h",
+    "codecs/ilbc/cb_update_best_index.c",
+    "codecs/ilbc/cb_update_best_index.h",
+    "codecs/ilbc/chebyshev.c",
+    "codecs/ilbc/chebyshev.h",
+    "codecs/ilbc/comp_corr.c",
+    "codecs/ilbc/comp_corr.h",
+    "codecs/ilbc/constants.c",
+    "codecs/ilbc/constants.h",
+    "codecs/ilbc/create_augmented_vec.c",
+    "codecs/ilbc/create_augmented_vec.h",
+    "codecs/ilbc/decode.c",
+    "codecs/ilbc/decode.h",
+    "codecs/ilbc/decode_residual.c",
+    "codecs/ilbc/decode_residual.h",
+    "codecs/ilbc/decoder_interpolate_lsf.c",
+    "codecs/ilbc/decoder_interpolate_lsf.h",
+    "codecs/ilbc/defines.h",
+    "codecs/ilbc/do_plc.c",
+    "codecs/ilbc/do_plc.h",
+    "codecs/ilbc/encode.c",
+    "codecs/ilbc/encode.h",
+    "codecs/ilbc/energy_inverse.c",
+    "codecs/ilbc/energy_inverse.h",
+    "codecs/ilbc/enhancer.c",
+    "codecs/ilbc/enhancer.h",
+    "codecs/ilbc/enhancer_interface.c",
+    "codecs/ilbc/enhancer_interface.h",
+    "codecs/ilbc/enh_upsample.c",
+    "codecs/ilbc/enh_upsample.h",
+    "codecs/ilbc/filtered_cb_vecs.c",
+    "codecs/ilbc/filtered_cb_vecs.h",
+    "codecs/ilbc/frame_classify.c",
+    "codecs/ilbc/frame_classify.h",
+    "codecs/ilbc/gain_dequant.c",
+    "codecs/ilbc/gain_dequant.h",
+    "codecs/ilbc/gain_quant.c",
+    "codecs/ilbc/gain_quant.h",
+    "codecs/ilbc/get_cd_vec.c",
+    "codecs/ilbc/get_cd_vec.h",
+    "codecs/ilbc/get_lsp_poly.c",
+    "codecs/ilbc/get_lsp_poly.h",
+    "codecs/ilbc/get_sync_seq.c",
+    "codecs/ilbc/get_sync_seq.h",
+    "codecs/ilbc/hp_input.c",
+    "codecs/ilbc/hp_input.h",
+    "codecs/ilbc/hp_output.c",
+    "codecs/ilbc/hp_output.h",
+    "codecs/ilbc/ilbc.c",
+    "codecs/ilbc/index_conv_dec.c",
+    "codecs/ilbc/index_conv_dec.h",
+    "codecs/ilbc/index_conv_enc.c",
+    "codecs/ilbc/index_conv_enc.h",
+    "codecs/ilbc/init_decode.c",
+    "codecs/ilbc/init_decode.h",
+    "codecs/ilbc/init_encode.c",
+    "codecs/ilbc/init_encode.h",
+    "codecs/ilbc/interface/ilbc.h",
+    "codecs/ilbc/interpolate.c",
+    "codecs/ilbc/interpolate.h",
+    "codecs/ilbc/interpolate_samples.c",
+    "codecs/ilbc/interpolate_samples.h",
+    "codecs/ilbc/lpc_encode.c",
+    "codecs/ilbc/lpc_encode.h",
+    "codecs/ilbc/lsf_check.c",
+    "codecs/ilbc/lsf_check.h",
+    "codecs/ilbc/lsf_interpolate_to_poly_dec.c",
+    "codecs/ilbc/lsf_interpolate_to_poly_dec.h",
+    "codecs/ilbc/lsf_interpolate_to_poly_enc.c",
+    "codecs/ilbc/lsf_interpolate_to_poly_enc.h",
+    "codecs/ilbc/lsf_to_lsp.c",
+    "codecs/ilbc/lsf_to_lsp.h",
+    "codecs/ilbc/lsf_to_poly.c",
+    "codecs/ilbc/lsf_to_poly.h",
+    "codecs/ilbc/lsp_to_lsf.c",
+    "codecs/ilbc/lsp_to_lsf.h",
+    "codecs/ilbc/my_corr.c",
+    "codecs/ilbc/my_corr.h",
+    "codecs/ilbc/nearest_neighbor.c",
+    "codecs/ilbc/nearest_neighbor.h",
+    "codecs/ilbc/pack_bits.c",
+    "codecs/ilbc/pack_bits.h",
+    "codecs/ilbc/poly_to_lsf.c",
+    "codecs/ilbc/poly_to_lsf.h",
+    "codecs/ilbc/poly_to_lsp.c",
+    "codecs/ilbc/poly_to_lsp.h",
+    "codecs/ilbc/refiner.c",
+    "codecs/ilbc/refiner.h",
+    "codecs/ilbc/simple_interpolate_lsf.c",
+    "codecs/ilbc/simple_interpolate_lsf.h",
+    "codecs/ilbc/simple_lpc_analysis.c",
+    "codecs/ilbc/simple_lpc_analysis.h",
+    "codecs/ilbc/simple_lsf_dequant.c",
+    "codecs/ilbc/simple_lsf_dequant.h",
+    "codecs/ilbc/simple_lsf_quant.c",
+    "codecs/ilbc/simple_lsf_quant.h",
+    "codecs/ilbc/smooth.c",
+    "codecs/ilbc/smooth.h",
+    "codecs/ilbc/smooth_out_data.c",
+    "codecs/ilbc/smooth_out_data.h",
+    "codecs/ilbc/sort_sq.c",
+    "codecs/ilbc/sort_sq.h",
+    "codecs/ilbc/split_vq.c",
+    "codecs/ilbc/split_vq.h",
+    "codecs/ilbc/state_construct.c",
+    "codecs/ilbc/state_construct.h",
+    "codecs/ilbc/state_search.c",
+    "codecs/ilbc/state_search.h",
+    "codecs/ilbc/swap_bytes.c",
+    "codecs/ilbc/swap_bytes.h",
+    "codecs/ilbc/unpack_bits.c",
+    "codecs/ilbc/unpack_bits.h",
+    "codecs/ilbc/vq3.c",
+    "codecs/ilbc/vq3.h",
+    "codecs/ilbc/vq4.c",
+    "codecs/ilbc/vq4.h",
+    "codecs/ilbc/window32_w32.c",
+    "codecs/ilbc/window32_w32.h",
+    "codecs/ilbc/xcorr_coef.c",
+    "codecs/ilbc/xcorr_coef.h",
+  ]
+
+  direct_dependent_configs = [ ":ilbc_config" ]
+
+  deps = [ "../../common_audio" ]
+}
+
+config("isac_config") {
+  include_dirs = [
+    "../..",
+    "codecs/isac/main/interface",
+  ]
+}
+
+source_set("isac") {
+  sources = [
+    "codecs/isac/main/interface/isac.h",
+    "codecs/isac/main/source/arith_routines.c",
+    "codecs/isac/main/source/arith_routines.h",
+    "codecs/isac/main/source/arith_routines_hist.c",
+    "codecs/isac/main/source/arith_routines_logist.c",
+    "codecs/isac/main/source/bandwidth_estimator.c",
+    "codecs/isac/main/source/bandwidth_estimator.h",
+    "codecs/isac/main/source/codec.h",
+    "codecs/isac/main/source/crc.c",
+    "codecs/isac/main/source/crc.h",
+    "codecs/isac/main/source/decode_bwe.c",
+    "codecs/isac/main/source/decode.c",
+    "codecs/isac/main/source/encode.c",
+    "codecs/isac/main/source/encode_lpc_swb.c",
+    "codecs/isac/main/source/encode_lpc_swb.h",
+    "codecs/isac/main/source/entropy_coding.c",
+    "codecs/isac/main/source/entropy_coding.h",
+    "codecs/isac/main/source/fft.c",
+    "codecs/isac/main/source/fft.h",
+    "codecs/isac/main/source/filterbanks.c",
+    "codecs/isac/main/source/filterbank_tables.c",
+    "codecs/isac/main/source/filterbank_tables.h",
+    "codecs/isac/main/source/filter_functions.c",
+    "codecs/isac/main/source/intialize.c",
+    "codecs/isac/main/source/isac.c",
+    "codecs/isac/main/source/lattice.c",
+    "codecs/isac/main/source/lpc_analysis.c",
+    "codecs/isac/main/source/lpc_analysis.h",
+    "codecs/isac/main/source/lpc_gain_swb_tables.c",
+    "codecs/isac/main/source/lpc_gain_swb_tables.h",
+    "codecs/isac/main/source/lpc_shape_swb12_tables.c",
+    "codecs/isac/main/source/lpc_shape_swb12_tables.h",
+    "codecs/isac/main/source/lpc_shape_swb16_tables.c",
+    "codecs/isac/main/source/lpc_shape_swb16_tables.h",
+    "codecs/isac/main/source/lpc_tables.c",
+    "codecs/isac/main/source/lpc_tables.h",
+    "codecs/isac/main/source/os_specific_inline.h",
+    "codecs/isac/main/source/pitch_estimator.c",
+    "codecs/isac/main/source/pitch_estimator.h",
+    "codecs/isac/main/source/pitch_filter.c",
+    "codecs/isac/main/source/pitch_gain_tables.c",
+    "codecs/isac/main/source/pitch_gain_tables.h",
+    "codecs/isac/main/source/pitch_lag_tables.c",
+    "codecs/isac/main/source/pitch_lag_tables.h",
+    "codecs/isac/main/source/settings.h",
+    "codecs/isac/main/source/spectrum_ar_model_tables.c",
+    "codecs/isac/main/source/spectrum_ar_model_tables.h",
+    "codecs/isac/main/source/structs.h",
+    "codecs/isac/main/source/transform.c",
+  ]
+
+  if (is_linux) {
+    libs = [ "m" ]
+  }
+
+  configs += [ "../..:common_inherited_config" ]
+
+  direct_dependent_configs = [ ":isac_config" ]
+
+  deps = [ "../../common_audio" ]
+}
+
+config("isac_fix_config") {
+  include_dirs = [
+    "../..",
+    "codecs/isac/fix/interface",
+  ]
+}
+
+source_set("isacfix") {
+  sources = [
+    "codecs/isac/fix/interface/isacfix.h",
+    "codecs/isac/fix/source/arith_routines.c",
+    "codecs/isac/fix/source/arith_routines_hist.c",
+    "codecs/isac/fix/source/arith_routines_logist.c",
+    "codecs/isac/fix/source/arith_routins.h",
+    "codecs/isac/fix/source/bandwidth_estimator.c",
+    "codecs/isac/fix/source/bandwidth_estimator.h",
+    "codecs/isac/fix/source/codec.h",
+    "codecs/isac/fix/source/decode_bwe.c",
+    "codecs/isac/fix/source/decode.c",
+    "codecs/isac/fix/source/decode_plc.c",
+    "codecs/isac/fix/source/encode.c",
+    "codecs/isac/fix/source/entropy_coding.c",
+    "codecs/isac/fix/source/entropy_coding.h",
+    "codecs/isac/fix/source/fft.c",
+    "codecs/isac/fix/source/fft.h",
+    "codecs/isac/fix/source/filterbanks.c",
+    "codecs/isac/fix/source/filterbank_tables.c",
+    "codecs/isac/fix/source/filterbank_tables.h",
+    "codecs/isac/fix/source/filters.c",
+    "codecs/isac/fix/source/initialize.c",
+    "codecs/isac/fix/source/isacfix.c",
+    "codecs/isac/fix/source/lattice.c",
+    "codecs/isac/fix/source/lpc_masking_model.c",
+    "codecs/isac/fix/source/lpc_masking_model.h",
+    "codecs/isac/fix/source/lpc_tables.c",
+    "codecs/isac/fix/source/lpc_tables.h",
+    "codecs/isac/fix/source/pitch_estimator.c",
+    "codecs/isac/fix/source/pitch_estimator.h",
+    "codecs/isac/fix/source/pitch_filter.c",
+    "codecs/isac/fix/source/pitch_gain_tables.c",
+    "codecs/isac/fix/source/pitch_gain_tables.h",
+    "codecs/isac/fix/source/pitch_lag_tables.c",
+    "codecs/isac/fix/source/pitch_lag_tables.h",
+    "codecs/isac/fix/source/settings.h",
+    "codecs/isac/fix/source/spectrum_ar_model_tables.c",
+    "codecs/isac/fix/source/spectrum_ar_model_tables.h",
+    "codecs/isac/fix/source/structs.h",
+    "codecs/isac/fix/source/transform.c",
+    "codecs/isac/fix/source/transform_tables.c",
+  ]
+
+  if (!is_win) {
+    defines = [ "WEBRTC_LINUX" ]
+  }
+
+  direct_dependent_configs = [ ":isac_fix_config" ]
+
+  deps = [
+    "../../common_audio",
+    "../../system_wrappers",
+  ]
+
+  if (build_armv7_neon) {
+    deps += [ ":isac_neon" ]
+
+    # Enable compilation for the ARM v7 Neon instruction set. This is needed
+    # since //build/config/arm.gni only enables Neon for iOS, not Android.
+    # This provides the same functionality as webrtc/build/arm_neon.gypi.
+    # TODO(kjellander): Investigate if this can be moved into webrtc.gni or
+    # //build/config/arm.gni instead, to reduce code duplication.
+    # Remove the -mfpu=vfpv3-d16 cflag.
+    configs -= [ "//build/config/compiler:compiler_arm_fpu" ]
+    cflags = [
+      "-flax-vector-conversions",
+      "-mfpu=neon",
+    ]
+
+    sources += [
+      "codecs/isac/fix/source/lattice_armv7.S",
+      "codecs/isac/fix/source/pitch_filter_armv6.S",
+    ]
+  } else {
+    sources += [ "codecs/isac/fix/source/pitch_filter_c.c" ]
+  }
+
+  if (cpu_arch == "mipsel") {
+    sources += [
+      "codecs/isac/fix/source/entropy_coding_mips.c",
+      "codecs/isac/fix/source/filters_mips.c",
+      "codecs/isac/fix/source/lattice_mips.c",
+      "codecs/isac/fix/source/pitch_estimator_mips.c",
+      "codecs/isac/fix/source/transform_mips.c",
+    ]
+    if (mips_dsp_rev > 0) {
+      sources += [ "codecs/isac/fix/source/filterbanks_mips.c" ]
+    }
+    if (mips_dsp_rev > 1) {
+      sources += [
+        "codecs/isac/fix/source/lpc_masking_model_mips.c",
+        "codecs/isac/fix/source/pitch_filter_mips.c",
+      ]
+    } else {
+      sources += [ "codecs/isac/fix/source/pitch_filter_c.c" ]
+    }
+  }
+
+  if (build_armv7_neon) {
+    sources += [
+      "codecs/isac/fix/source/lattice_c.c",
+      "codecs/isac/fix/source/pitch_estimator_c.c",
+   ]
+  }
+}
+
+if (build_armv7_neon) {
+  source_set("isac_neon") {
+    sources = [
+      "codecs/isac/fix/source/entropy_coding_neon.c",
+      "codecs/isac/fix/source/filterbanks_neon.S",
+      "codecs/isac/fix/source/filters_neon.S",
+      "codecs/isac/fix/source/lattice_neon.S",
+      "codecs/isac/fix/source/lpc_masking_model_neon.S",
+      "codecs/isac/fix/source/transform_neon.S",
+    ]
+
+    include_dirs = [
+      "../..",
+    ]
+
+    # Disable LTO in audio_processing_neon target due to compiler bug.
+    if (use_lto) {
+      cflags -= [
+        "-flto",
+        "-ffat-lto-objects",
+      ]
+    }
+
+    # Enable compilation for the ARM v7 Neon instruction set. This is needed
+    # since //build/config/arm.gni only enables Neon for iOS, not Android.
+    # This provides the same functionality as webrtc/build/arm_neon.gypi.
+    # TODO(kjellander): Investigate if this can be moved into webrtc.gni or
+    # //build/config/arm.gni instead, to reduce code duplication.
+    # Remove the -mfpu=vfpv3-d16 cflag.
+    configs -= [ "//build/config/compiler:compiler_arm_fpu" ]
+    cflags = [
+      "-flax-vector-conversions",
+      "-mfpu=neon",
+    ]
+
+    deps = [ "../../common_audio" ]
+  }
+}
+
+config("pcm16b_config") {
+  include_dirs = [
+    "../..",
+    "codecs/pcm16b/include",
+  ]
+}
+
+source_set("pcm16b") {
+  sources = [
+    "codecs/pcm16b/include/pcm16b.h",
+    "codecs/pcm16b/pcm16b.c",
+  ]
+
+  direct_dependent_configs = [ ":pcm16b_config" ]
+}
+
+config("opus_config") {
+  include_dirs = [ "../.." ]
+}
+
+source_set("webrtc_opus") {
+  sources = [
+    "codecs/opus/interface/opus_interface.h",
+    "codecs/opus/opus_inst.h",
+    "codecs/opus/opus_interface.c",
+  ]
+  if (build_with_mozilla) {
+    include_dirs = [ getenv("DIST") + "/include/opus" ]
+  } else {
+    configs += [ "../..:common_inherited_config" ]
+
+    deps = [ "//third_party/opus" ]
+  }
+}
+
+config("neteq_config") {
+  include_dirs = [
+    # Need Opus header files for the audio classifier.
+    "//third_party/opus/src/celt",
+    "//third_party/opus/src/src",
+  ]
+}
+
+source_set("neteq") {
+  sources = [
+    "neteq/interface/audio_decoder.h",
+    "neteq/interface/neteq.h",
+    "neteq/accelerate.cc",
+    "neteq/accelerate.h",
+    "neteq/audio_classifier.cc",
+    "neteq/audio_classifier.h",
+    "neteq/audio_decoder_impl.cc",
+    "neteq/audio_decoder_impl.h",
+    "neteq/audio_decoder.cc",
+    "neteq/audio_multi_vector.cc",
+    "neteq/audio_multi_vector.h",
+    "neteq/audio_vector.cc",
+    "neteq/audio_vector.h",
+    "neteq/background_noise.cc",
+    "neteq/background_noise.h",
+    "neteq/buffer_level_filter.cc",
+    "neteq/buffer_level_filter.h",
+    "neteq/comfort_noise.cc",
+    "neteq/comfort_noise.h",
+    "neteq/decision_logic.cc",
+    "neteq/decision_logic.h",
+    "neteq/decision_logic_fax.cc",
+    "neteq/decision_logic_fax.h",
+    "neteq/decision_logic_normal.cc",
+    "neteq/decision_logic_normal.h",
+    "neteq/decoder_database.cc",
+    "neteq/decoder_database.h",
+    "neteq/defines.h",
+    "neteq/delay_manager.cc",
+    "neteq/delay_manager.h",
+    "neteq/delay_peak_detector.cc",
+    "neteq/delay_peak_detector.h",
+    "neteq/dsp_helper.cc",
+    "neteq/dsp_helper.h",
+    "neteq/dtmf_buffer.cc",
+    "neteq/dtmf_buffer.h",
+    "neteq/dtmf_tone_generator.cc",
+    "neteq/dtmf_tone_generator.h",
+    "neteq/expand.cc",
+    "neteq/expand.h",
+    "neteq/merge.cc",
+    "neteq/merge.h",
+    "neteq/neteq_impl.cc",
+    "neteq/neteq_impl.h",
+    "neteq/neteq.cc",
+    "neteq/statistics_calculator.cc",
+    "neteq/statistics_calculator.h",
+    "neteq/normal.cc",
+    "neteq/normal.h",
+    "neteq/packet_buffer.cc",
+    "neteq/packet_buffer.h",
+    "neteq/payload_splitter.cc",
+    "neteq/payload_splitter.h",
+    "neteq/post_decode_vad.cc",
+    "neteq/post_decode_vad.h",
+    "neteq/preemptive_expand.cc",
+    "neteq/preemptive_expand.h",
+    "neteq/random_vector.cc",
+    "neteq/random_vector.h",
+    "neteq/rtcp.cc",
+    "neteq/rtcp.h",
+    "neteq/sync_buffer.cc",
+    "neteq/sync_buffer.h",
+    "neteq/timestamp_scaler.cc",
+    "neteq/timestamp_scaler.h",
+    "neteq/time_stretch.cc",
+    "neteq/time_stretch.h",
+  ]
+
+  direct_dependent_configs = [ ":neteq_config" ]
+
+  forward_dependent_configs_from = [ "//third_party/opus" ]
+
+  if (is_clang) {
+    # Suppress warnings from Chrome's Clang plugins.
+    # See http://code.google.com/p/webrtc/issues/detail?id=163 for details.
+    configs -= [ "//build/config/clang:find_bad_constructs" ]
+  }
+
+  deps = [
+    ":cng",
+    ":g711",
+    ":g722",
+    ":ilbc",
+    ":isac",
+    ":isacfix",
+    ":pcm16b",
+    "../../common_audio",
+    "../../system_wrappers",
+    "//third_party/opus",
+  ]
 }
diff --git a/modules/audio_coding/codecs/isac/main/source/filter_functions.c b/modules/audio_coding/codecs/isac/main/source/filter_functions.c
index 33024a3d..76a9e753 100644
--- a/modules/audio_coding/codecs/isac/main/source/filter_functions.c
+++ b/modules/audio_coding/codecs/isac/main/source/filter_functions.c
@@ -9,6 +9,7 @@
  */
 
 #include <memory.h>
+#include <string.h>
 #ifdef WEBRTC_ANDROID
 #include <stdlib.h>
 #endif
diff --git a/modules/audio_coding/codecs/isac/main/source/lattice.c b/modules/audio_coding/codecs/isac/main/source/lattice.c
index a46135a3..eabe7080 100644
--- a/modules/audio_coding/codecs/isac/main/source/lattice.c
+++ b/modules/audio_coding/codecs/isac/main/source/lattice.c
@@ -19,6 +19,7 @@
 
 #include <math.h>
 #include <memory.h>
+#include <string.h>
 #ifdef WEBRTC_ANDROID
 #include <stdlib.h>
 #endif
diff --git a/modules/audio_coding/codecs/isac/main/source/pitch_estimator.c b/modules/audio_coding/codecs/isac/main/source/pitch_estimator.c
index 75525f69..090b94ca 100644
--- a/modules/audio_coding/codecs/isac/main/source/pitch_estimator.c
+++ b/modules/audio_coding/codecs/isac/main/source/pitch_estimator.c
@@ -12,6 +12,7 @@
 
 #include <math.h>
 #include <memory.h>
+#include <string.h>
 #ifdef WEBRTC_ANDROID
 #include <stdlib.h>
 #endif
diff --git a/modules/audio_processing/BUILD.gn b/modules/audio_processing/BUILD.gn
index a727d54b..57b721bd 100644
--- a/modules/audio_processing/BUILD.gn
+++ b/modules/audio_processing/BUILD.gn
@@ -6,8 +6,222 @@
 # in the file PATENTS.  All contributing project authors may
 # be found in the AUTHORS file in the root of the source tree.
 
+import("//build/config/arm.gni")
+import("//third_party/protobuf/proto_library.gni")
 import("../../build/webrtc.gni")
 
+declare_args() {
+  # Outputs some low-level debug files.
+  aec_debug_dump = false
+
+  # Disables the usual mode where we trust the reported system delay
+  # values the AEC receives. The corresponding define is set appropriately
+  # in the code, but it can be force-enabled here for testing.
+  aec_untrusted_delay_for_testing = false
+}
+
 source_set("audio_processing") {
-  # TODO(andrew): Implement.
+  sources = [
+    "aec/include/echo_cancellation.h",
+    "aec/echo_cancellation.c",
+    "aec/echo_cancellation_internal.h",
+    "aec/aec_core.h",
+    "aec/aec_core.c",
+    "aec/aec_core_internal.h",
+    "aec/aec_rdft.h",
+    "aec/aec_rdft.c",
+    "aec/aec_resampler.h",
+    "aec/aec_resampler.c",
+    "aecm/include/echo_control_mobile.h",
+    "aecm/echo_control_mobile.c",
+    "aecm/aecm_core.c",
+    "aecm/aecm_core.h",
+    "agc/include/gain_control.h",
+    "agc/analog_agc.c",
+    "agc/analog_agc.h",
+    "agc/digital_agc.c",
+    "agc/digital_agc.h",
+    "audio_buffer.cc",
+    "audio_buffer.h",
+    "audio_processing_impl.cc",
+    "audio_processing_impl.h",
+    "common.h",
+    "echo_cancellation_impl.cc",
+    "echo_cancellation_impl.h",
+    "echo_control_mobile_impl.cc",
+    "echo_control_mobile_impl.h",
+    "gain_control_impl.cc",
+    "gain_control_impl.h",
+    "high_pass_filter_impl.cc",
+    "high_pass_filter_impl.h",
+    "include/audio_processing.h",
+    "level_estimator_impl.cc",
+    "level_estimator_impl.h",
+    "noise_suppression_impl.cc",
+    "noise_suppression_impl.h",
+    "processing_component.cc",
+    "processing_component.h",
+    "rms_level.cc",
+    "rms_level.h",
+    "typing_detection.cc",
+    "typing_detection.h",
+    "utility/delay_estimator.c",
+    "utility/delay_estimator.h",
+    "utility/delay_estimator_internal.h",
+    "utility/delay_estimator_wrapper.c",
+    "utility/delay_estimator_wrapper.h",
+    "utility/fft4g.c",
+    "utility/fft4g.h",
+    "utility/ring_buffer.c",
+    "utility/ring_buffer.h",
+    "voice_detection_impl.cc",
+    "voice_detection_impl.h",
+  ]
+
+  defines = []
+  deps = []
+
+  if (aec_debug_dump) {
+    defines += [ "WEBRTC_AEC_DEBUG_DUMP" ]
+  }
+
+  if (aec_untrusted_delay_for_testing) {
+    defines += [ "WEBRTC_UNTRUSTED_DELAY" ]
+  }
+
+  if (enable_protobuf) {
+    defines += [ "WEBRTC_AUDIOPROC_DEBUG_DUMP" ]
+    deps += [ ":audioproc_debug_proto" ]
+  }
+
+  if (prefer_fixed_point) {
+    defines += [ "WEBRTC_NS_FIXED" ]
+    sources += [
+      "ns/include/noise_suppression_x.h",
+      "ns/noise_suppression_x.c",
+      "ns/nsx_core.c",
+      "ns/nsx_core.h",
+      "ns/nsx_defines.h",
+    ]
+    if (cpu_arch == "mipsel") {
+      sources += [ "ns/nsx_core_mips.c" ]
+    } else {
+      sources += [ "ns/nsx_core_c.c" ]
+    }
+  } else {
+    defines += [ "WEBRTC_NS_FLOAT" ]
+    sources += [
+      "ns/defines.h",
+      "ns/include/noise_suppression.h",
+      "ns/noise_suppression.c",
+      "ns/ns_core.c",
+      "ns/ns_core.h",
+      "ns/windows_private.h",
+    ]
+  }
+
+  if (cpu_arch == "x86" || cpu_arch == "x64") {
+    deps += [ ":audio_processing_sse2" ]
+  }
+
+  if (build_armv7_neon) {
+    deps += [ ":audio_processing_neon" ]
+  }
+
+  if (cpu_arch == "mipsel") {
+    sources += [ "aecm/aecm_core_mips.c" ]
+    if (mips_fpu)  {
+      sources += [
+        "aec/aec_core_mips.c",
+        "aec/aec_rdft_mips.c",
+      ]
+    }
+  } else {
+    sources += [ "aecm/aecm_core_c.c" ]
+  }
+
+  if (is_win) {
+    cflags = [
+      # TODO(jschuh): Bug 1348: fix this warning.
+      "/wd4267",  # size_t to int truncations
+    ]
+  }
+
+  if (is_clang) {
+    # Suppress warnings from Chrome's Clang plugins.
+    # See http://code.google.com/p/webrtc/issues/detail?id=163 for details.
+    configs -= [ "//build/config/clang:find_bad_constructs" ]
+  }
+
+  deps += [
+    "../../common_audio",
+    "../../system_wrappers",
+  ]
+}
+
+if (enable_protobuf) {
+  proto_library("audioproc_debug_proto") {
+    sources = [ "debug.proto" ]
+
+    proto_out_dir = "webrtc/audio_processing"
+  }
+}
+
+if (cpu_arch == "x86" || cpu_arch == "x64") {
+  source_set("audio_processing_sse2") {
+    sources = [
+      "aec/aec_core_sse2.c",
+      "aec/aec_rdft_sse2.c",
+    ]
+
+    cflags = [ "-msse2" ]
+
+    configs += [ "../..:common_inherited_config" ]
+  }
+}
+
+if (build_armv7_neon) {
+  source_set("audio_processing_neon") {
+    sources = [
+      "aec/aec_core_neon.c",
+      "aec/aec_rdft_neon.c",
+    ]
+
+    deps = [ "../../common_audio" ]
+
+    if (is_android || is_ios) {
+      sources += [
+        # TODO(andrew): Re-enable these once webrtc:3580 is resolved.
+        #"aecm/aecm_core_neon.S",
+        #"ns/nsx_core_neon.S",
+      ]
+
+      include_dirs = [ target_out_dir ]
+    } else {
+      sources += [
+        "aecm/aecm_core_neon.c",
+        "ns/nsx_core_neon.c",
+      ]
+    }
+
+    # Enable compilation for the ARM v7 Neon instruction set. This is needed
+    # since //build/config/arm.gni only enables Neon for iOS, not Android.
+    # This provides the same functionality as webrtc/build/arm_neon.gypi.
+    # TODO(kjellander): Investigate if this can be moved into webrtc.gni or
+    # //build/config/arm.gni instead, to reduce code duplication.
+    # Remove the -mfpu=vfpv3-d16 cflag.
+    configs -= [ "//build/config/compiler:compiler_arm_fpu" ]
+    cflags = [
+      "-flax-vector-conversions",
+      "-mfpu=neon",
+    ]
+
+    # Disable LTO in audio_processing_neon target due to compiler bug.
+    if (use_lto) {
+      cflags -= [
+        "-flto",
+        "-ffat-lto-objects",
+      ]
+    }
+  }
 }
diff --git a/voice_engine/BUILD.gn b/voice_engine/BUILD.gn
index 7c1a1b19..f9c5f913 100644
--- a/voice_engine/BUILD.gn
+++ b/voice_engine/BUILD.gn
@@ -9,5 +9,97 @@
 import("../build/webrtc.gni")
 
 source_set("voice_engine") {
-  # TODO(henrika): Implement.
+
+  sources = [
+    "../common_types.h",
+    "../engine_configurations.h",
+    "../typedefs.h",
+    "include/voe_audio_processing.h",
+    "include/voe_base.h",
+    "include/voe_codec.h",
+    "include/voe_dtmf.h",
+    "include/voe_errors.h",
+    "include/voe_external_media.h",
+    "include/voe_file.h",
+    "include/voe_hardware.h",
+    "include/voe_neteq_stats.h",
+    "include/voe_network.h",
+    "include/voe_rtp_rtcp.h",
+    "include/voe_video_sync.h",
+    "include/voe_volume_control.h",
+    "channel.cc",
+    "channel.h",
+    "channel_manager.cc",
+    "channel_manager.h",
+    "dtmf_inband.cc",
+    "dtmf_inband.h",
+    "dtmf_inband_queue.cc",
+    "dtmf_inband_queue.h",
+    "level_indicator.cc",
+    "level_indicator.h",
+    "monitor_module.cc",
+    "monitor_module.h",
+    "network_predictor.cc",
+    "network_predictor.h",
+    "output_mixer.cc",
+    "output_mixer.h",
+    "shared_data.cc",
+    "shared_data.h",
+    "statistics.cc",
+    "statistics.h",
+    "transmit_mixer.cc",
+    "transmit_mixer.h",
+    "utility.cc",
+    "utility.h",
+    "voe_audio_processing_impl.cc",
+    "voe_audio_processing_impl.h",
+    "voe_base_impl.cc",
+    "voe_base_impl.h",
+    "voe_codec_impl.cc",
+    "voe_codec_impl.h",
+    "voe_dtmf_impl.cc",
+    "voe_dtmf_impl.h",
+    "voe_external_media_impl.cc",
+    "voe_external_media_impl.h",
+    "voe_file_impl.cc",
+    "voe_file_impl.h",
+    "voe_hardware_impl.cc",
+    "voe_hardware_impl.h",
+    "voe_neteq_stats_impl.cc",
+    "voe_neteq_stats_impl.h",
+    "voe_network_impl.cc",
+    "voe_network_impl.h",
+    "voe_rtp_rtcp_impl.cc",
+    "voe_rtp_rtcp_impl.h",
+    "voe_video_sync_impl.cc",
+    "voe_video_sync_impl.h",
+    "voe_volume_control_impl.cc",
+    "voe_volume_control_impl.h",
+    "voice_engine_defines.h",
+    "voice_engine_impl.cc",
+    "voice_engine_impl.h",
+  ]
+
+  if (is_win) {
+    defines = [ "WEBRTC_DRIFT_COMPENSATION_SUPPORTED" ]
+  }
+
+  if (is_clang) {
+    # Suppress warnings from Chrome's Clang plugins.
+    # See http://code.google.com/p/webrtc/issues/detail?id=163 for details.
+    configs -= [ "//build/config/clang:find_bad_constructs" ]
+  }
+
+  deps = [
+    "../common_audio",
+    "../modules/audio_coding",
+    "../modules/audio_conference_mixer",
+    "../modules/audio_device",
+    "../modules/audio_processing",
+    "../modules/bitrate_controller",
+    "../modules/media_file",
+    "../modules/rtp_rtcp",
+    "../modules/utility",
+    "../system_wrappers",
+  ]
 }