Merge CV, ver=5.1; ops/methods from HV, and interface from CV where possible

[goodguy/history.git] / cinelerra-5.1 / libzmpeg3 / a52dec-0.7.3 / libao / audio_out_null.c

diff --git a/cinelerra-5.1/libzmpeg3/a52dec-0.7.3/libao/audio_out_null.c b/cinelerra-5.1/libzmpeg3/a52dec-0.7.3/libao/audio_out_null.c
new file mode 100644 (file)
index 0000000..be9c136
--- /dev/null
+++ b/cinelerra-5.1/libzmpeg3/a52dec-0.7.3/libao/audio_out_null.c
@@ -0,0 +1,78 @@
+/*
+ * audio_out_null.c
+ * Copyright (C) 2000-2002 Michel Lespinasse <walken@zoy.org>
+ * Copyright (C) 1999-2000 Aaron Holtzman <aholtzma@ess.engr.uvic.ca>
+ *
+ * This file is part of a52dec, a free ATSC A-52 stream decoder.
+ * See http://liba52.sourceforge.net/ for updates.
+ *
+ * a52dec is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * a52dec is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#include "config.h"
+
+#include <inttypes.h>
+
+#include "a52.h"
+#include "audio_out.h"
+
+typedef struct null_instance_s {
+    ao_instance_t ao;
+    int channels;
+} null_instance_t;
+
+int null_setup (ao_instance_t * _instance, int sample_rate, int * flags,
+               sample_t * level, sample_t * bias)
+{
+    null_instance_t * instance = (null_instance_t *) _instance;
+
+    *flags = instance->channels;
+    *level = 1;
+    *bias = 0;
+
+    return 0;
+}
+
+int null_play (ao_instance_t * instance, int flags, sample_t * samples)
+{
+    return 0;
+}
+
+void null_close (ao_instance_t * instance)
+{
+}
+
+static null_instance_t instance = {{null_setup, null_play, null_close}, 0};
+
+ao_instance_t * ao_null_open (void)
+{
+    instance.channels = A52_STEREO;
+
+    return (ao_instance_t *) &instance;
+}
+
+ao_instance_t * ao_null4_open (void)
+{
+    instance.channels = A52_2F2R;
+
+    return (ao_instance_t *) &instance;
+}
+
+ao_instance_t * ao_null6_open (void)
+{
+    instance.channels = A52_3F2R | A52_LFE;
+
+    return (ao_instance_t *) &instance;
+}