On 8/8/2021 2:29 PM, Anton Khirnov wrote:
+int sws_frame_start(struct SwsContext *c, AVFrame *dst, const AVFrame *src)
+{
+ int ret, allocated = 0;
+
+ ret = av_frame_ref(c->frame_src, src);
+ if (ret < 0)
+ return ret;
+
+ if (!dst->buf[0]) {
The frame could have non refcounted buffers, and av_frame_get_buffer()
below would overwrite the data pointers.
IMO, just state in the doxy that if already allocated, the data buffers
must be reference counted.
+ dst->width = c->dstW;
+ dst->height = c->dstH;
+ dst->format = c->dstFormat;
+
+ ret = av_frame_get_buffer(dst, 0);
+ if (ret < 0)
+ return ret;
+ allocated = 1;
+ }
+
+ ret = av_frame_ref(c->frame_dst, dst);
+ if (ret < 0) {
+ if (allocated)
+ av_frame_unref(dst);
+
+ return ret;
+ }
+
+ return 0;
+}
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