video no audio

1 files changed, 31 insertions, 1 deletions

diff --git a/api.c b/api.c
index 5dba38a..0562bba 100644
--- a/api.c
+++ b/api.c
@@ -74,7 +74,9 @@ bool api_init(void) {
 	// find videomode
 	// CEngineAPI::SetEngineWindow calls videomode->SetGameWindow after
 	// detaching the current window with another vcall. Look for the second one.
-	// This, like the demoplayer, is a pointer. Mind the double dereference.
+	// This, like the demoplayer, is a pointer. We need to keep the double
+	// pointer because when we get this, it is null. It is set by the engine
+	// later.
 	instr = (const u8 *)engineapi->vt->set_engine_window;
 	int mov_ecx_counter = 0;
 	for (const u8 *p = instr; p - instr < 64;) {
@@ -89,6 +91,34 @@ bool api_init(void) {
 		p += l;
 	}
 	debug("videomode = %p", (void *)videomode);
+
+	// find cl_movieinfo
+	{
+		// step 1: find CL_IsRecordingMovie() in
+		// CEngineTools::StartMovieRecording
+		instr = (const u8 *)enginetools->vt->start_movie_recording;
+		void *cl_isrecordingmovie = NULL;
+		for (const u8 *p = instr; p - instr < 64;) {
+			// this is the first call in the function
+			if (*p == X86_CALL) {
+				cl_isrecordingmovie = (void *)(p + 5 + *(i32 *)(p + 1));
+			}
+			int l = x86_len(p);
+			if (l == -1)
+				bail("invalid instruction looking for CL_IsRecordingMovie");
+			p += l;
+		}
+		if (!cl_isrecordingmovie)
+			bail("couldn't find cbuf_addtext CL_IsRecordingMovie");
+
+		// step 2: get the pointer to cl_movieinfo
+		// should be in the first instruction
+		instr = (const u8 *)cl_isrecordingmovie;
+		if (instr[0] != X86_ALUMI8 || instr[1] != X86_MODRM(0, 7, 5))
+			bail("couldn't get movieinfo");
+		movieinfo = *(struct movieinfo **)(instr + 2);
+		debug("movieinfo = %p", (void *)movieinfo);
+	}
 	
 	return true;
 }