Merge pull request #850 from trav90/add-av1-support

Add initial support for AV1 video.

1 files changed, 125 insertions, 0 deletions

diff --git a/third_party/aom/av1/common/convolve.h b/third_party/aom/av1/common/convolve.h
new file mode 100644
index 000000000..4109dd843
--- /dev/null
+++ b/third_party/aom/av1/common/convolve.h
@@ -0,0 +1,125 @@
+/*
+ * Copyright (c) 2016, Alliance for Open Media. All rights reserved
+ *
+ * This source code is subject to the terms of the BSD 2 Clause License and
+ * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
+ * was not distributed with this source code in the LICENSE file, you can
+ * obtain it at www.aomedia.org/license/software. If the Alliance for Open
+ * Media Patent License 1.0 was not distributed with this source code in the
+ * PATENTS file, you can obtain it at www.aomedia.org/license/patent.
+ */
+
+#ifndef AOM_AV1_COMMON_CONVOLVE_H_
+#define AOM_AV1_COMMON_CONVOLVE_H_
+#include "av1/common/filter.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef uint16_t CONV_BUF_TYPE;
+typedef struct ConvolveParams {
+  int do_average;
+  CONV_BUF_TYPE *dst;
+  int dst_stride;
+  int round_0;
+  int round_1;
+  int plane;
+  int is_compound;
+  int use_jnt_comp_avg;
+  int fwd_offset;
+  int bck_offset;
+} ConvolveParams;
+
+#define ROUND0_BITS 3
+#define COMPOUND_ROUND1_BITS 7
+#define WIENER_ROUND0_BITS 3
+
+#define WIENER_CLAMP_LIMIT(r0, bd) (1 << ((bd) + 1 + FILTER_BITS - r0))
+
+typedef void (*aom_convolve_fn_t)(const uint8_t *src, int src_stride,
+                                  uint8_t *dst, int dst_stride, int w, int h,
+                                  const InterpFilterParams *filter_params_x,
+                                  const InterpFilterParams *filter_params_y,
+                                  const int subpel_x_q4, const int subpel_y_q4,
+                                  ConvolveParams *conv_params);
+
+typedef void (*aom_highbd_convolve_fn_t)(
+    const uint16_t *src, int src_stride, uint16_t *dst, int dst_stride, int w,
+    int h, const InterpFilterParams *filter_params_x,
+    const InterpFilterParams *filter_params_y, const int subpel_x_q4,
+    const int subpel_y_q4, ConvolveParams *conv_params, int bd);
+
+struct AV1Common;
+struct scale_factors;
+
+void av1_convolve_2d_facade(const uint8_t *src, int src_stride, uint8_t *dst,
+                            int dst_stride, int w, int h,
+                            InterpFilters interp_filters, const int subpel_x_q4,
+                            int x_step_q4, const int subpel_y_q4, int y_step_q4,
+                            int scaled, ConvolveParams *conv_params,
+                            const struct scale_factors *sf, int is_intrabc);
+
+static INLINE ConvolveParams get_conv_params_no_round(int do_average, int plane,
+                                                      CONV_BUF_TYPE *dst,
+                                                      int dst_stride,
+                                                      int is_compound, int bd) {
+  ConvolveParams conv_params;
+  conv_params.do_average = do_average;
+  assert(IMPLIES(do_average, is_compound));
+  conv_params.is_compound = is_compound;
+  conv_params.round_0 = ROUND0_BITS;
+  conv_params.round_1 = is_compound ? COMPOUND_ROUND1_BITS
+                                    : 2 * FILTER_BITS - conv_params.round_0;
+  const int intbufrange = bd + FILTER_BITS - conv_params.round_0 + 2;
+  assert(IMPLIES(bd < 12, intbufrange <= 16));
+  if (intbufrange > 16) {
+    conv_params.round_0 += intbufrange - 16;
+    if (!is_compound) conv_params.round_1 -= intbufrange - 16;
+  }
+  // TODO(yunqing): The following dst should only be valid while
+  // is_compound = 1;
+  conv_params.dst = dst;
+  conv_params.dst_stride = dst_stride;
+  conv_params.plane = plane;
+  return conv_params;
+}
+
+static INLINE ConvolveParams get_conv_params(int do_average, int plane,
+                                             int bd) {
+  return get_conv_params_no_round(do_average, plane, NULL, 0, 0, bd);
+}
+
+static INLINE ConvolveParams get_conv_params_wiener(int bd) {
+  ConvolveParams conv_params;
+  (void)bd;
+  conv_params.do_average = 0;
+  conv_params.is_compound = 0;
+  conv_params.round_0 = WIENER_ROUND0_BITS;
+  conv_params.round_1 = 2 * FILTER_BITS - conv_params.round_0;
+  const int intbufrange = bd + FILTER_BITS - conv_params.round_0 + 2;
+  assert(IMPLIES(bd < 12, intbufrange <= 16));
+  if (intbufrange > 16) {
+    conv_params.round_0 += intbufrange - 16;
+    conv_params.round_1 -= intbufrange - 16;
+  }
+  conv_params.dst = NULL;
+  conv_params.dst_stride = 0;
+  conv_params.plane = 0;
+  return conv_params;
+}
+
+void av1_highbd_convolve_2d_facade(const uint8_t *src8, int src_stride,
+                                   uint8_t *dst, int dst_stride, int w, int h,
+                                   InterpFilters interp_filters,
+                                   const int subpel_x_q4, int x_step_q4,
+                                   const int subpel_y_q4, int y_step_q4,
+                                   int scaled, ConvolveParams *conv_params,
+                                   const struct scale_factors *sf,
+                                   int is_intrabc, int bd);
+
+#ifdef __cplusplus
+}  // extern "C"
+#endif
+
+#endif  // AOM_AV1_COMMON_CONVOLVE_H_