[FFmpeg-devel] [PATCH 2/5] avcodec/mjpegdec: Don't create unnecessary AVFrame reference

[Andreas Rheinhardt <andreas.rheinhardt@outlook.com>]

MJPEG is an intra-codec, so it makes no sense to keep the reference.
It is basically unused lateron anyway.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
---
 libavcodec/mjpegdec.c | 45 +++++++++++++++++++++----------------------
 1 file changed, 22 insertions(+), 23 deletions(-)

diff --git a/libavcodec/mjpegdec.c b/libavcodec/mjpegdec.c
index 0e76bf4c26..939dedce33 100644
--- a/libavcodec/mjpegdec.c
+++ b/libavcodec/mjpegdec.c
@@ -2589,8 +2589,7 @@ eoi_parser:
 
                 av_freep(&s->hwaccel_picture_private);
             }
-            if ((ret = av_frame_ref(frame, s->picture_ptr)) < 0)
-                return ret;
+            av_frame_move_ref(frame, s->picture_ptr);
             s->got_picture = 0;
 
             frame->pkt_dts = s->pkt->dts;
@@ -2675,9 +2674,9 @@ the_end:
         if (ret)
             return ret;
 
-        av_assert0(s->nb_components == av_pix_fmt_count_planes(s->picture_ptr->format));
+        av_assert0(s->nb_components == av_pix_fmt_count_planes(frame->format));
         for (p = 0; p<s->nb_components; p++) {
-            uint8_t *line = s->picture_ptr->data[p];
+            uint8_t *line = frame->data[p];
             int w = s->width;
             int h = s->height;
             if (!s->upscale_h[p])
@@ -2737,7 +2736,7 @@ the_end:
         if (ret)
             return ret;
 
-        av_assert0(s->nb_components == av_pix_fmt_count_planes(s->picture_ptr->format));
+        av_assert0(s->nb_components == av_pix_fmt_count_planes(frame->format));
         for (p = 0; p < s->nb_components; p++) {
             uint8_t *dst;
             int w = s->width;
@@ -2748,10 +2747,10 @@ the_end:
                 w = AV_CEIL_RSHIFT(w, hshift);
                 h = AV_CEIL_RSHIFT(h, vshift);
             }
-            dst = &((uint8_t *)s->picture_ptr->data[p])[(h - 1) * s->linesize[p]];
+            dst = &frame->data[p][(h - 1) * s->linesize[p]];
             for (i = h - 1; i; i--) {
-                uint8_t *src1 = &((uint8_t *)s->picture_ptr->data[p])[i * s->upscale_v[p] / (s->upscale_v[p] + 1) * s->linesize[p]];
-                uint8_t *src2 = &((uint8_t *)s->picture_ptr->data[p])[(i + 1) * s->upscale_v[p] / (s->upscale_v[p] + 1) * s->linesize[p]];
+                uint8_t *src1 = &frame->data[p][ i      * s->upscale_v[p] / (s->upscale_v[p] + 1) * s->linesize[p]];
+                uint8_t *src2 = &frame->data[p][(i + 1) * s->upscale_v[p] / (s->upscale_v[p] + 1) * s->linesize[p]];
                 if (s->upscale_v[p] != 2 && (src1 == src2 || i == h - 1)) {
                     memcpy(dst, src1, w);
                 } else {
@@ -2768,36 +2767,36 @@ the_end:
         if (ret)
             return ret;
 
-        av_assert0(s->nb_components == av_pix_fmt_count_planes(s->picture_ptr->format));
+        av_assert0(s->nb_components == av_pix_fmt_count_planes(frame->format));
         for (index=0; index<s->nb_components; index++) {
-            uint8_t *dst = s->picture_ptr->data[index];
-            int w = s->picture_ptr->width;
-            int h = s->picture_ptr->height;
+            uint8_t *dst = frame->data[index];
+            int w = frame->width;
+            int h = frame->height;
             if(index && index<3){
                 w = AV_CEIL_RSHIFT(w, hshift);
                 h = AV_CEIL_RSHIFT(h, vshift);
             }
             if(dst){
-                uint8_t *dst2 = dst + s->picture_ptr->linesize[index]*(h-1);
+                uint8_t *dst2 = dst + frame->linesize[index]*(h-1);
                 for (i=0; i<h/2; i++) {
                     for (j=0; j<w; j++)
                         FFSWAP(int, dst[j], dst2[j]);
-                    dst  += s->picture_ptr->linesize[index];
-                    dst2 -= s->picture_ptr->linesize[index];
+                    dst  += frame->linesize[index];
+                    dst2 -= frame->linesize[index];
                 }
             }
         }
     }
     if (s->adobe_transform == 0 && s->avctx->pix_fmt == AV_PIX_FMT_GBRAP) {
-        int w = s->picture_ptr->width;
-        int h = s->picture_ptr->height;
+        int w = frame->width;
+        int h = frame->height;
         av_assert0(s->nb_components == 4);
         for (i=0; i<h; i++) {
             int j;
             uint8_t *dst[4];
             for (index=0; index<4; index++) {
-                dst[index] =   s->picture_ptr->data[index]
-                             + s->picture_ptr->linesize[index]*i;
+                dst[index] =   frame->data[index]
+                             + frame->linesize[index]*i;
             }
             for (j=0; j<w; j++) {
                 int k = dst[3][j];
@@ -2812,15 +2811,15 @@ the_end:
         }
     }
     if (s->adobe_transform == 2 && s->avctx->pix_fmt == AV_PIX_FMT_YUVA444P) {
-        int w = s->picture_ptr->width;
-        int h = s->picture_ptr->height;
+        int w = frame->width;
+        int h = frame->height;
         av_assert0(s->nb_components == 4);
         for (i=0; i<h; i++) {
             int j;
             uint8_t *dst[4];
             for (index=0; index<4; index++) {
-                dst[index] =   s->picture_ptr->data[index]
-                             + s->picture_ptr->linesize[index]*i;
+                dst[index] =   frame->data[index]
+                             + frame->linesize[index]*i;
             }
             for (j=0; j<w; j++) {
                 int k = dst[3][j];
-- 
2.32.0

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