[FFmpeg-cvslog] avcodec/truemotion2: Allocate buffers together

[Andreas Rheinhardt]

ffmpeg | branch: master | Andreas Rheinhardt <andreas.rheinhardt at gmail.com> | Sun Sep 27 15:55:27 2020 +0200| [0302728c9e18a75669cbf5beb47150b9318aa0f8] | committer: Andreas Rheinhardt

avcodec/truemotion2: Allocate buffers together

Reduces the number of allocations and frees.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt at gmail.com>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=0302728c9e18a75669cbf5beb47150b9318aa0f8
---

 libavcodec/truemotion2.c | 46 +++++++++++++++++++---------------------------
 1 file changed, 19 insertions(+), 27 deletions(-)

diff --git a/libavcodec/truemotion2.c b/libavcodec/truemotion2.c
index a90ff8cf01..0f4f345a6c 100644
--- a/libavcodec/truemotion2.c
+++ b/libavcodec/truemotion2.c
@@ -81,7 +81,7 @@ typedef struct TM2Context {
     int *clast;
 
     /* data for current and previous frame */
-    int *Y1_base, *U1_base, *V1_base, *Y2_base, *U2_base, *V2_base;
+    int *Y_base, *UV_base;
     int *Y1, *U1, *V1, *Y2, *U2, *V2;
     int y_stride, uv_stride;
     int cur;
@@ -966,32 +966,29 @@ static av_cold int decode_init(AVCodecContext *avctx)
 
     ff_bswapdsp_init(&l->bdsp);
 
-    l->last  = av_malloc_array(w >> 2, 4 * sizeof(*l->last) );
-    l->clast = av_malloc_array(w >> 2, 4 * sizeof(*l->clast));
+    l->last  = av_malloc_array(w, 2 * sizeof(*l->last));
+    if (!l->last)
+        return AVERROR(ENOMEM);
+    l->clast = l->last + w;
 
     w += 8;
     h += 8;
-    l->Y1_base = av_calloc(w * h, sizeof(*l->Y1_base));
-    l->Y2_base = av_calloc(w * h, sizeof(*l->Y2_base));
+    l->Y_base = av_calloc(w * h, 2 * sizeof(*l->Y_base));
+    if (!l->Y_base)
+        return AVERROR(ENOMEM);
     l->y_stride = w;
+    l->Y1 = l->Y_base + l->y_stride * 4 + 4;
+    l->Y2 = l->Y1 + w * h;
     w = (w + 1) >> 1;
     h = (h + 1) >> 1;
-    l->U1_base = av_calloc(w * h, sizeof(*l->U1_base));
-    l->V1_base = av_calloc(w * h, sizeof(*l->V1_base));
-    l->U2_base = av_calloc(w * h, sizeof(*l->U2_base));
-    l->V2_base = av_calloc(w * h, sizeof(*l->V1_base));
-    l->uv_stride = w;
-    if (!l->Y1_base || !l->Y2_base || !l->U1_base ||
-        !l->V1_base || !l->U2_base || !l->V2_base ||
-        !l->last    || !l->clast) {
+    l->UV_base = av_calloc(w * h, 4 * sizeof(*l->UV_base));
+    if (!l->UV_base)
         return AVERROR(ENOMEM);
-    }
-    l->Y1 = l->Y1_base + l->y_stride  * 4 + 4;
-    l->Y2 = l->Y2_base + l->y_stride  * 4 + 4;
-    l->U1 = l->U1_base + l->uv_stride * 2 + 2;
-    l->U2 = l->U2_base + l->uv_stride * 2 + 2;
-    l->V1 = l->V1_base + l->uv_stride * 2 + 2;
-    l->V2 = l->V2_base + l->uv_stride * 2 + 2;
+    l->uv_stride = w;
+    l->U1 = l->UV_base + l->uv_stride * 2 + 2;
+    l->U2 = l->U1 + w * h;
+    l->V1 = l->U2 + w * h;
+    l->V2 = l->V1 + w * h;
 
     return 0;
 }
@@ -1002,16 +999,11 @@ static av_cold int decode_end(AVCodecContext *avctx)
     int i;
 
     av_freep(&l->last);
-    av_freep(&l->clast);
     for (i = 0; i < TM2_NUM_STREAMS; i++)
         av_freep(&l->tokens[i]);
 
-        av_freep(&l->Y1_base);
-        av_freep(&l->U1_base);
-        av_freep(&l->V1_base);
-        av_freep(&l->Y2_base);
-        av_freep(&l->U2_base);
-        av_freep(&l->V2_base);
+    av_freep(&l->Y_base);
+    av_freep(&l->UV_base);
     av_freep(&l->buffer);
     l->buffer_size = 0;