1 files changed, 105 insertions, 0 deletions
diff --git a/libavfilter/vf_eq.h b/libavfilter/vf_eq.h
new file mode 100644
index 0000000000..8525048b3f
--- /dev/null
+++ b/libavfilter/vf_eq.h
@@ -0,0 +1,105 @@
+/*
+ * Original MPlayer filters by Richard Felker, Hampa Hug, Daniel Moreno,
+ * and Michael Niedermeyer.
+ *
+ * Copyright (c) 2014 James Darnley <james.darnley@gmail.com>
+ * Copyright (c) 2015 Arwa Arif <arwaarif1994@gmail.com>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with FFmpeg; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#ifndef AVFILTER_EQ_H
+#define AVFILTER_EQ_H
+
+#include "avfilter.h"
+#include "libavutil/eval.h"
+
+static const char *const var_names[] = {
+    "n",   // frame count
+    "pos", // frame position
+    "r",   // frame rate
+    "t",   // timestamp expressed in seconds
+    NULL
+};
+
+enum var_name {
+    VAR_N,
+    VAR_POS,
+    VAR_R,
+    VAR_T,
+    VAR_NB
+};
+
+typedef struct EQParameters {
+    void (*adjust)(struct EQParameters *eq, uint8_t *dst, int dst_stride,
+                   const uint8_t *src, int src_stride, int w, int h);
+
+    uint8_t lut[256];
+
+    double brightness, contrast, gamma, gamma_weight;
+    int lut_clean;
+
+} EQParameters;
+
+typedef struct {
+    const AVClass *class;
+
+    EQParameters param[3];
+
+    char   *contrast_expr;
+    AVExpr *contrast_pexpr;
+    double  contrast;
+
+    char   *brightness_expr;
+    AVExpr *brightness_pexpr;
+    double  brightness;
+
+    char   *saturation_expr;
+    AVExpr *saturation_pexpr;
+    double  saturation;
+
+    char   *gamma_expr;
+    AVExpr *gamma_pexpr;
+    double  gamma;
+
+    char   *gamma_weight_expr;
+    AVExpr *gamma_weight_pexpr;
+    double  gamma_weight;
+
+    char   *gamma_r_expr;
+    AVExpr *gamma_r_pexpr;
+    double  gamma_r;
+
+    char   *gamma_g_expr;
+    AVExpr *gamma_g_pexpr;
+    double  gamma_g;
+
+    char   *gamma_b_expr;
+    AVExpr *gamma_b_pexpr;
+    double  gamma_b;
+
+    double var_values[VAR_NB];
+
+    void (*process)(struct EQParameters *par, uint8_t *dst, int dst_stride,
+                    const uint8_t *src, int src_stride, int w, int h);
+
+    enum EvalMode { EVAL_MODE_INIT, EVAL_MODE_FRAME, EVAL_MODE_NB } eval_mode;
+} EQContext;
+
+void ff_eq_init_x86(EQContext *eq);
+
+#endif /* AVFILTER_EQ_H */