libobs: Add API to specify codec support on encoded outputs

(This commit also modifies obs-outputs)

libobs/obs-output.c

@@ -2162,3 +2162,15 @@ bool obs_output_reconnecting(const obs_output_t *output)
 
 	return reconnecting(output);
 }
+
+const char *obs_output_get_supported_video_codecs(const obs_output_t *output)
+{
+	return obs_output_valid(output, __FUNCTION__) ?
+		output->info.encoded_video_codecs : NULL;
+}
+
+const char *obs_output_get_supported_audio_codecs(const obs_output_t *output)
+{
+	return obs_output_valid(output, __FUNCTION__) ?
+		output->info.encoded_audio_codecs : NULL;
+}

libobs/obs-output.h

@@ -67,6 +67,10 @@ struct obs_output_info {
 
 	float (*get_congestion)(void *data);
 	int (*get_connect_time_ms)(void *data);
+
+	/* only used with encoded outputs, separated with semicolon */
+	const char *encoded_video_codecs;
+	const char *encoded_audio_codecs;
 };
 
 EXPORT void obs_register_output_s(const struct obs_output_info *info,

libobs/obs.h

@@ -1524,6 +1524,11 @@ EXPORT bool obs_output_reconnecting(const obs_output_t *output);
 EXPORT void obs_output_set_last_error(obs_output_t *output,
 		const char *message);
 
+EXPORT const char *obs_output_get_supported_video_codecs(
+		const obs_output_t *output);
+EXPORT const char *obs_output_get_supported_audio_codecs(
+		const obs_output_t *output);
+
 /* ------------------------------------------------------------------------- */
 /* Functions used by outputs */