1 files changed, 42 insertions, 0 deletions
diff --git a/filters/f_swresample.h b/filters/f_swresample.h
new file mode 100644
index 0000000000..44b2e35d08
--- /dev/null
+++ b/filters/f_swresample.h
@@ -0,0 +1,42 @@
+#pragma once
+
+#include <stdbool.h>
+
+#include "audio/chmap.h"
+#include "filter.h"
+
+// Resampler filter, wrapping libswresample or libavresample.
+struct mp_swresample {
+    struct mp_filter *f;
+    // Desired output parameters. For unset parameters, passes through the
+    // format.
+    int out_rate;
+    int out_format;
+    struct mp_chmap out_channels;
+    double speed;
+};
+
+struct mp_resample_opts {
+    int filter_size;
+    int phase_shift;
+    int linear;
+    double cutoff;
+    int normalize;
+    int allow_passthrough;
+    char **avopts;
+};
+
+#define MP_RESAMPLE_OPTS_DEF {  \
+    .filter_size = 16,          \
+    .cutoff      = 0.0,         \
+    .phase_shift = 10,          \
+    .normalize   = 0,           \
+    }
+
+// Create the filter. If opts==NULL, use the global options as defaults.
+// Free with talloc_free(mp_swresample.f).
+struct mp_swresample *mp_swresample_create(struct mp_filter *parent,
+                                           struct mp_resample_opts *opts);
+
+// Internal resampler delay. Does not include data buffered in mp_pins and such.
+double mp_swresample_get_delay(struct mp_swresample *s);