avfilter: Port mp=eq/eq2 to lavfi

Code adapted from James Darnley's port
Some fixes from Paul B Mahol <onemda@gmail.com>

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

1 files changed, 60 insertions, 0 deletions

diff --git a/libavfilter/vf_eq.h b/libavfilter/vf_eq.h
new file mode 100644
index 0000000000..19995aa1f9
--- /dev/null
+++ b/libavfilter/vf_eq.h
@@ -0,0 +1,60 @@
+/*
+ * 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"
+
+typedef struct EQParameters {
+    void (*adjust)(struct EQParameters *eq, uint8_t *dst, int dst_stride,
+                   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];
+
+    double contrast;
+    double brightness;
+    double saturation;
+
+    double gamma;
+    double gamma_weight;
+    double gamma_r, gamma_g, gamma_b;
+
+    void (*process)(struct EQParameters *par, uint8_t *dst, int dst_stride,
+                    uint8_t *src, int src_stride, int w, int h);
+
+} EQContext;
+
+void ff_eq_init_x86(EQContext *eq);
+
+#endif /* AVFILTER_EQ_H */