[FFmpeg-devel] [PATCH] lavfi: Add support to process_command in vf_eq.c

[arwa arif]

I have tried to add process_command in vf_eq.c. I have attached the patch.

From 1d65e493a8eb247d86b0db324cb740579662706d Mon Sep 17 00:00:00 2001
From: Arwa Arif <arwaarif1...@gmail.com>
Date: Fri, 30 Jan 2015 23:06:50 +0530
Subject: [PATCH] Add support to process_command in vf_eq.c

---
 libavfilter/vf_eq.c |   53 ++++++++++++++++++++++++++++++++++++++-------------
 1 file changed, 40 insertions(+), 13 deletions(-)

diff --git a/libavfilter/vf_eq.c b/libavfilter/vf_eq.c
index ad2a37e..5899abb 100644
--- a/libavfilter/vf_eq.c
+++ b/libavfilter/vf_eq.c
@@ -27,11 +27,6 @@
  * very simple video equalizer
  */
 
-/**
- * TODO:
- * - Add support to process_command
- */
-
 #include "libavfilter/internal.h"
 #include "libavutil/common.h"
 #include "libavutil/imgutils.h"
@@ -217,6 +212,37 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *in)
     av_frame_free(&in);
     return ff_filter_frame(outlink, out);
 }
+
+static int process_command(AVFilterContext *ctx, const char *cmd, const char *args,
+                           char *res, int res_len, int flags)
+{
+    EQContext *eq = ctx->priv;
+
+    if (!strcmp(cmd, "contrast"))
+        eq->contrast     = av_clipf(strtod(args, NULL), -2.0,  2.0);
+    if (!strcmp(cmd, "brightness"))
+        eq->brightness   = av_clipf(strtod(args, NULL), -1.0,  1.0);
+    if (!strcmp(cmd, "saturation"))
+        eq->saturation   = av_clipf(strtod(args, NULL),  0.0,  3.0);
+    if (!strcmp(cmd, "gamma"))
+        eq->gamma        = av_clipf(strtod(args, NULL),  0.1, 10.0);
+    if (!strcmp(cmd, "gamma_r"))
+        eq->gamma_r      = av_clipf(strtod(args, NULL),  0.1, 10.0);
+    if (!strcmp(cmd, "gamma_g"))
+        eq->gamma_g      = av_clipf(strtod(args, NULL),  0.1, 10.0);
+    if (!strcmp(cmd, "gamma_b"))
+        eq->gamma_b      = av_clipf(strtod(args, NULL),  0.1, 10.0);
+    if (!strcmp(cmd, "gamma_weight"))
+        eq->gamma_weight = av_clipf(strtod(args, NULL),  0.0,  1.0);
+
+    set_gamma(eq);
+    set_contrast(eq);
+    set_brightness(eq);
+    set_saturation(eq);
+
+    return 0;
+}
+
 static const AVFilterPad eq_inputs[] = {
     {
         .name = "default",
@@ -260,12 +286,13 @@ static const AVOption eq_options[] = {
 AVFILTER_DEFINE_CLASS(eq);
 
 AVFilter ff_vf_eq = {
-    .name          = "eq",
-    .description   = NULL_IF_CONFIG_SMALL("Adjust brightness, contrast, gamma, and saturation."),
-    .priv_size     = sizeof(EQContext),
-    .priv_class    = &eq_class,
-    .inputs        = eq_inputs,
-    .outputs       = eq_outputs,
-    .query_formats = query_formats,
-    .init          = initialize,
+    .name            = "eq",
+    .description     = NULL_IF_CONFIG_SMALL("Adjust brightness, contrast, gamma, and saturation."),
+    .priv_size       = sizeof(EQContext),
+    .priv_class      = &eq_class,
+    .inputs          = eq_inputs,
+    .outputs         = eq_outputs,
+    .process_command = process_command,
+    .query_formats   = query_formats,
+    .init            = initialize,
 };
-- 
1.7.9.5


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