Splits vp9_impl into libvpx_vp9_encoder and libvpx_vp9_decoder.

Also moves the LibvpxVp8Interface from codec/vp8 to codec/interface and
drops vp8 from the name.

Follow-up CLs will wire up actual usage in the new classes through the
interface so that we can unit test them more easily.

Bug: webrtc:12274
Change-Id: I95f66e90245d9320e5fc23cdc845fbeb2648b38b
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/196522
Commit-Queue: Erik Språng <sprang@webrtc.org>
Reviewed-by: Sergey Silkin <ssilkin@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#32816}
diff --git a/modules/video_coding/codecs/interface/libvpx_interface.cc b/modules/video_coding/codecs/interface/libvpx_interface.cc
new file mode 100644
index 0000000..8ab7bf5
--- /dev/null
+++ b/modules/video_coding/codecs/interface/libvpx_interface.cc
@@ -0,0 +1,210 @@
+/*
+ *  Copyright (c) 2018 The WebRTC project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+
+#include "modules/video_coding/codecs/interface/libvpx_interface.h"
+
+#include <memory>
+
+#include "rtc_base/checks.h"
+
+namespace webrtc {
+namespace {
+class LibvpxFacade : public LibvpxInterface {
+ public:
+  LibvpxFacade() = default;
+  ~LibvpxFacade() override = default;
+
+  vpx_image_t* img_alloc(vpx_image_t* img,
+                         vpx_img_fmt_t fmt,
+                         unsigned int d_w,
+                         unsigned int d_h,
+                         unsigned int align) const override {
+    return ::vpx_img_alloc(img, fmt, d_w, d_h, align);
+  }
+
+  vpx_image_t* img_wrap(vpx_image_t* img,
+                        vpx_img_fmt_t fmt,
+                        unsigned int d_w,
+                        unsigned int d_h,
+                        unsigned int stride_align,
+                        unsigned char* img_data) const override {
+    return ::vpx_img_wrap(img, fmt, d_w, d_h, stride_align, img_data);
+  }
+
+  void img_free(vpx_image_t* img) const override { ::vpx_img_free(img); }
+
+  vpx_codec_err_t codec_enc_config_set(
+      vpx_codec_ctx_t* ctx,
+      const vpx_codec_enc_cfg_t* cfg) const override {
+    return ::vpx_codec_enc_config_set(ctx, cfg);
+  }
+
+  vpx_codec_err_t codec_enc_config_default(vpx_codec_iface_t* iface,
+                                           vpx_codec_enc_cfg_t* cfg,
+                                           unsigned int usage) const override {
+    return ::vpx_codec_enc_config_default(iface, cfg, usage);
+  }
+
+  vpx_codec_err_t codec_enc_init(vpx_codec_ctx_t* ctx,
+                                 vpx_codec_iface_t* iface,
+                                 const vpx_codec_enc_cfg_t* cfg,
+                                 vpx_codec_flags_t flags) const override {
+    return ::vpx_codec_enc_init(ctx, iface, cfg, flags);
+  }
+
+  vpx_codec_err_t codec_enc_init_multi(vpx_codec_ctx_t* ctx,
+                                       vpx_codec_iface_t* iface,
+                                       vpx_codec_enc_cfg_t* cfg,
+                                       int num_enc,
+                                       vpx_codec_flags_t flags,
+                                       vpx_rational_t* dsf) const override {
+    return ::vpx_codec_enc_init_multi(ctx, iface, cfg, num_enc, flags, dsf);
+  }
+
+  vpx_codec_err_t codec_destroy(vpx_codec_ctx_t* ctx) const override {
+    return ::vpx_codec_destroy(ctx);
+  }
+
+  // For types related to these parameters, see section
+  // "VP8 encoder control function parameter type" in vpx/vp8cx.h.
+
+  vpx_codec_err_t codec_control(vpx_codec_ctx_t* ctx,
+                                vp8e_enc_control_id ctrl_id,
+                                uint32_t param) const override {
+    // We need an explicit call for each type since vpx_codec_control is a
+    // macro that gets expanded into another call based on the parameter name.
+    switch (ctrl_id) {
+      case VP8E_SET_ENABLEAUTOALTREF:
+        return vpx_codec_control(ctx, VP8E_SET_ENABLEAUTOALTREF, param);
+      case VP8E_SET_NOISE_SENSITIVITY:
+        return vpx_codec_control(ctx, VP8E_SET_NOISE_SENSITIVITY, param);
+      case VP8E_SET_SHARPNESS:
+        return vpx_codec_control(ctx, VP8E_SET_SHARPNESS, param);
+      case VP8E_SET_STATIC_THRESHOLD:
+        return vpx_codec_control(ctx, VP8E_SET_STATIC_THRESHOLD, param);
+      case VP8E_SET_ARNR_MAXFRAMES:
+        return vpx_codec_control(ctx, VP8E_SET_ARNR_MAXFRAMES, param);
+      case VP8E_SET_ARNR_STRENGTH:
+        return vpx_codec_control(ctx, VP8E_SET_ARNR_STRENGTH, param);
+      case VP8E_SET_ARNR_TYPE:
+        RTC_NOTREACHED() << "VP8E_SET_ARNR_TYPE is deprecated.";
+        return VPX_CODEC_UNSUP_FEATURE;
+      case VP8E_SET_CQ_LEVEL:
+        return vpx_codec_control(ctx, VP8E_SET_CQ_LEVEL, param);
+      case VP8E_SET_MAX_INTRA_BITRATE_PCT:
+        return vpx_codec_control(ctx, VP8E_SET_MAX_INTRA_BITRATE_PCT, param);
+      case VP8E_SET_GF_CBR_BOOST_PCT:
+        return vpx_codec_control(ctx, VP8E_SET_GF_CBR_BOOST_PCT, param);
+      case VP8E_SET_SCREEN_CONTENT_MODE:
+        return vpx_codec_control(ctx, VP8E_SET_SCREEN_CONTENT_MODE, param);
+      default:
+        RTC_NOTREACHED() << "Unsupported libvpx ctrl_id: " << ctrl_id;
+    }
+    return VPX_CODEC_ERROR;
+  }
+
+  vpx_codec_err_t codec_control(vpx_codec_ctx_t* ctx,
+                                vp8e_enc_control_id ctrl_id,
+                                int param) const override {
+    switch (ctrl_id) {
+      case VP8E_SET_FRAME_FLAGS:
+        return vpx_codec_control(ctx, VP8E_SET_FRAME_FLAGS, param);
+      case VP8E_SET_TEMPORAL_LAYER_ID:
+        return vpx_codec_control(ctx, VP8E_SET_TEMPORAL_LAYER_ID, param);
+      case VP8E_SET_CPUUSED:
+        return vpx_codec_control(ctx, VP8E_SET_CPUUSED, param);
+      case VP8E_SET_TOKEN_PARTITIONS:
+        return vpx_codec_control(ctx, VP8E_SET_TOKEN_PARTITIONS, param);
+      case VP8E_SET_TUNING:
+        return vpx_codec_control(ctx, VP8E_SET_TUNING, param);
+
+      default:
+        RTC_NOTREACHED() << "Unsupported libvpx ctrl_id: " << ctrl_id;
+    }
+    return VPX_CODEC_ERROR;
+  }
+
+  vpx_codec_err_t codec_control(vpx_codec_ctx_t* ctx,
+                                vp8e_enc_control_id ctrl_id,
+                                int* param) const override {
+    switch (ctrl_id) {
+      case VP8E_GET_LAST_QUANTIZER:
+        return vpx_codec_control(ctx, VP8E_GET_LAST_QUANTIZER, param);
+      case VP8E_GET_LAST_QUANTIZER_64:
+        return vpx_codec_control(ctx, VP8E_GET_LAST_QUANTIZER_64, param);
+      default:
+        RTC_NOTREACHED() << "Unsupported libvpx ctrl_id: " << ctrl_id;
+    }
+    return VPX_CODEC_ERROR;
+  }
+
+  vpx_codec_err_t codec_control(vpx_codec_ctx_t* ctx,
+                                vp8e_enc_control_id ctrl_id,
+                                vpx_roi_map* param) const override {
+    switch (ctrl_id) {
+      case VP8E_SET_ROI_MAP:
+        return vpx_codec_control(ctx, VP8E_SET_ROI_MAP, param);
+      default:
+        RTC_NOTREACHED() << "Unsupported libvpx ctrl_id: " << ctrl_id;
+    }
+    return VPX_CODEC_ERROR;
+  }
+
+  vpx_codec_err_t codec_control(vpx_codec_ctx_t* ctx,
+                                vp8e_enc_control_id ctrl_id,
+                                vpx_active_map* param) const override {
+    switch (ctrl_id) {
+      case VP8E_SET_ACTIVEMAP:
+        return vpx_codec_control(ctx, VP8E_SET_ACTIVEMAP, param);
+      default:
+        RTC_NOTREACHED() << "Unsupported libvpx ctrl_id: " << ctrl_id;
+    }
+    return VPX_CODEC_ERROR;
+  }
+
+  vpx_codec_err_t codec_control(vpx_codec_ctx_t* ctx,
+                                vp8e_enc_control_id ctrl_id,
+                                vpx_scaling_mode* param) const override {
+    switch (ctrl_id) {
+      case VP8E_SET_SCALEMODE:
+        return vpx_codec_control(ctx, VP8E_SET_SCALEMODE, param);
+      default:
+        RTC_NOTREACHED() << "Unsupported libvpx ctrl_id: " << ctrl_id;
+    }
+    return VPX_CODEC_ERROR;
+  }
+
+  vpx_codec_err_t codec_encode(vpx_codec_ctx_t* ctx,
+                               const vpx_image_t* img,
+                               vpx_codec_pts_t pts,
+                               uint64_t duration,
+                               vpx_enc_frame_flags_t flags,
+                               uint64_t deadline) const override {
+    return ::vpx_codec_encode(ctx, img, pts, duration, flags, deadline);
+  }
+
+  const vpx_codec_cx_pkt_t* codec_get_cx_data(
+      vpx_codec_ctx_t* ctx,
+      vpx_codec_iter_t* iter) const override {
+    return ::vpx_codec_get_cx_data(ctx, iter);
+  }
+
+  const char* codec_error_detail(vpx_codec_ctx_t* ctx) const override {
+    return ::vpx_codec_error_detail(ctx);
+  }
+};
+
+}  // namespace
+
+std::unique_ptr<LibvpxInterface> LibvpxInterface::Create() {
+  return std::make_unique<LibvpxFacade>();
+}
+
+}  // namespace webrtc