lavd/opengl_enc: check strings before parsing them.

Fix a segfault if OpenGL was not initialized before calling write_header().

Nicolas George committed 6 years ago

Commit 26ae9c91 parent fbb36d71 file · +4 −0Browse files

Unified · Split

@@ -588,6 +588,10 @@ static av_cold int opengl_read_limits(AVFormatContext *h) · 587 unmodified lines
588	588
589	589	version = glGetString(GL_VERSION);
590	590	extensions = glGetString(GL_EXTENSIONS);
	591	+ if (!version \|\| !extensions) {
	592	+ av_log(h, AV_LOG_ERROR, "No OpenGL context initialized for the current thread\n");
	593	+ return AVERROR(ENOSYS);
	594	+ }
591	595
592	596	av_log(h, AV_LOG_DEBUG, "OpenGL version: %s\n", version);
593	597	sscanf(version, "%d.%d", &major, &minor);

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