fftools/ffmpeg_(filter|opt): Use dedicated pointer for array elem access

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>

2 files changed, 41 insertions, 29 deletions

diff --git a/fftools/ffmpeg_filter.c b/fftools/ffmpeg_filter.c
index 28704203b9..7263ea5f03 100644
--- a/fftools/ffmpeg_filter.c
+++ b/fftools/ffmpeg_filter.c
@@ -159,29 +159,33 @@ DEF_CHOOSE_FORMAT(channel_layouts, uint64_t, channel_layout, channel_layouts, 0,
 int init_simple_filtergraph(InputStream *ist, OutputStream *ost)
 {
     FilterGraph *fg = av_mallocz(sizeof(*fg));
+    OutputFilter *ofilter;
+    InputFilter  *ifilter;
 
     if (!fg)
         exit_program(1);
     fg->index = nb_filtergraphs;
 
     ALLOC_ARRAY_ELEM(fg->outputs, fg->nb_outputs);
-    fg->outputs[0]->ost   = ost;
-    fg->outputs[0]->graph = fg;
-    fg->outputs[0]->format = -1;
+    ofilter = fg->outputs[0];
+    ofilter->ost    = ost;
+    ofilter->graph  = fg;
+    ofilter->format = -1;
 
-    ost->filter = fg->outputs[0];
+    ost->filter = ofilter;
 
     ALLOC_ARRAY_ELEM(fg->inputs, fg->nb_inputs);
-    fg->inputs[0]->ist   = ist;
-    fg->inputs[0]->graph = fg;
-    fg->inputs[0]->format = -1;
+    ifilter = fg->inputs[0];
+    ifilter->ist    = ist;
+    ifilter->graph  = fg;
+    ifilter->format = -1;
 
-    fg->inputs[0]->frame_queue = av_fifo_alloc(8 * sizeof(AVFrame*));
-    if (!fg->inputs[0]->frame_queue)
+    ifilter->frame_queue = av_fifo_alloc(8 * sizeof(AVFrame*));
+    if (!ifilter->frame_queue)
         exit_program(1);
 
     GROW_ARRAY(ist->filters, ist->nb_filters);
-    ist->filters[ist->nb_filters - 1] = fg->inputs[0];
+    ist->filters[ist->nb_filters - 1] = ifilter;
 
     GROW_ARRAY(filtergraphs, nb_filtergraphs);
     filtergraphs[nb_filtergraphs - 1] = fg;
@@ -210,6 +214,7 @@ static void init_input_filter(FilterGraph *fg, AVFilterInOut *in)
 {
     InputStream *ist = NULL;
     enum AVMediaType type = avfilter_pad_get_type(in->filter_ctx->input_pads, in->pad_idx);
+    InputFilter *ifilter;
     int i;
 
     // TODO: support other filter types
@@ -277,18 +282,19 @@ static void init_input_filter(FilterGraph *fg, AVFilterInOut *in)
     ist->st->discard = AVDISCARD_NONE;
 
     ALLOC_ARRAY_ELEM(fg->inputs, fg->nb_inputs);
-    fg->inputs[fg->nb_inputs - 1]->ist   = ist;
-    fg->inputs[fg->nb_inputs - 1]->graph = fg;
-    fg->inputs[fg->nb_inputs - 1]->format = -1;
-    fg->inputs[fg->nb_inputs - 1]->type = ist->st->codecpar->codec_type;
-    fg->inputs[fg->nb_inputs - 1]->name = describe_filter_link(fg, in, 1);
-
-    fg->inputs[fg->nb_inputs - 1]->frame_queue = av_fifo_alloc(8 * sizeof(AVFrame*));
-    if (!fg->inputs[fg->nb_inputs - 1]->frame_queue)
+    ifilter = fg->inputs[fg->nb_inputs - 1];
+    ifilter->ist    = ist;
+    ifilter->graph  = fg;
+    ifilter->format = -1;
+    ifilter->type   = ist->st->codecpar->codec_type;
+    ifilter->name   = describe_filter_link(fg, in, 1);
+
+    ifilter->frame_queue = av_fifo_alloc(8 * sizeof(AVFrame*));
+    if (!ifilter->frame_queue)
         exit_program(1);
 
     GROW_ARRAY(ist->filters, ist->nb_filters);
-    ist->filters[ist->nb_filters - 1] = fg->inputs[fg->nb_inputs - 1];
+    ist->filters[ist->nb_filters - 1] = ifilter;
 }
 
 int init_complex_filtergraph(FilterGraph *fg)
@@ -312,15 +318,17 @@ int init_complex_filtergraph(FilterGraph *fg)
         init_input_filter(fg, cur);
 
     for (cur = outputs; cur;) {
+        OutputFilter *ofilter;
         ALLOC_ARRAY_ELEM(fg->outputs, fg->nb_outputs);
+        ofilter = fg->outputs[fg->nb_outputs - 1];
 
-        fg->outputs[fg->nb_outputs - 1]->graph   = fg;
-        fg->outputs[fg->nb_outputs - 1]->out_tmp = cur;
-        fg->outputs[fg->nb_outputs - 1]->type    = avfilter_pad_get_type(cur->filter_ctx->output_pads,
+        ofilter->graph   = fg;
+        ofilter->out_tmp = cur;
+        ofilter->type    = avfilter_pad_get_type(cur->filter_ctx->output_pads,
                                                                          cur->pad_idx);
-        fg->outputs[fg->nb_outputs - 1]->name = describe_filter_link(fg, cur, 0);
+        ofilter->name    = describe_filter_link(fg, cur, 0);
         cur = cur->next;
-        fg->outputs[fg->nb_outputs - 1]->out_tmp->next = NULL;
+        ofilter->out_tmp->next = NULL;
     }
 
 fail:
diff --git a/fftools/ffmpeg_opt.c b/fftools/ffmpeg_opt.c
index 848b817e9c..bd1d451ff7 100644
--- a/fftools/ffmpeg_opt.c
+++ b/fftools/ffmpeg_opt.c
@@ -3258,10 +3258,12 @@ static int opt_audio_qscale(void *optctx, const char *opt, const char *arg)
 
 static int opt_filter_complex(void *optctx, const char *opt, const char *arg)
 {
+    FilterGraph *fg;
     ALLOC_ARRAY_ELEM(filtergraphs, nb_filtergraphs);
-    filtergraphs[nb_filtergraphs - 1]->index      = nb_filtergraphs - 1;
-    filtergraphs[nb_filtergraphs - 1]->graph_desc = av_strdup(arg);
-    if (!filtergraphs[nb_filtergraphs - 1]->graph_desc)
+    fg = filtergraphs[nb_filtergraphs - 1];
+    fg->index      = nb_filtergraphs - 1;
+    fg->graph_desc = av_strdup(arg);
+    if (!fg->graph_desc)
         return AVERROR(ENOMEM);
 
     input_stream_potentially_available = 1;
@@ -3271,13 +3273,15 @@ static int opt_filter_complex(void *optctx, const char *opt, const char *arg)
 
 static int opt_filter_complex_script(void *optctx, const char *opt, const char *arg)
 {
+    FilterGraph *fg;
     uint8_t *graph_desc = read_file(arg);
     if (!graph_desc)
         return AVERROR(EINVAL);
 
     ALLOC_ARRAY_ELEM(filtergraphs, nb_filtergraphs);
-    filtergraphs[nb_filtergraphs - 1]->index      = nb_filtergraphs - 1;
-    filtergraphs[nb_filtergraphs - 1]->graph_desc = graph_desc;
+    fg = filtergraphs[nb_filtergraphs - 1];
+    fg->index      = nb_filtergraphs - 1;
+    fg->graph_desc = graph_desc;
 
     input_stream_potentially_available = 1;