1 files changed, 59 insertions, 0 deletions
diff --git a/filters/f_output_chain.h b/filters/f_output_chain.h
new file mode 100644
index 0000000000..64667ed1bd
--- /dev/null
+++ b/filters/f_output_chain.h
@@ -0,0 +1,59 @@
+#pragma once
+
+#include "options/m_option.h"
+#include "video/mp_image.h"
+
+#include "filter.h"
+
+enum mp_output_chain_type {
+    MP_OUTPUT_CHAIN_VIDEO = 1,      // --vf
+};
+
+// A classic single-media filter chain, which reflects --vf and --af.
+// It manages the user-specified filter chain, and VO/AO output conversions.
+// Also handles some automatic filtering (auto rotation and such).
+struct mp_output_chain {
+    // This filter will have 1 input (from decoder) and 1 output (to VO/AO).
+    struct mp_filter *f;
+
+    bool got_input_eof;
+    bool got_output_eof;
+
+    // The filter chain output could not be converted to any format the output
+    // supports.
+    bool failed_output_conversion;
+
+    // Set if any formats in the chain changed. The user can reset the flag.
+    // For implementing change notifications out input/output_params.
+    bool reconfig_happened;
+
+    // --- for type==MP_OUTPUT_CHAIN_VIDEO
+    struct mp_image_params input_params;
+    struct mp_image_params output_params;
+    double container_fps;
+};
+
+// (free by freeing mp_output_chain.f)
+struct mp_output_chain *mp_output_chain_create(struct mp_filter *parent,
+                                               enum mp_output_chain_type type);
+
+// Set the VO, which will be used to determine basic capabilities like format
+// and rotation support, and to init hardware filtering things.
+// For type==MP_OUTPUT_CHAIN_VIDEO only.
+struct vo;
+void mp_output_chain_set_vo(struct mp_output_chain *p, struct vo *vo);
+
+// Send a command to the filter with the target label.
+bool mp_output_chain_command(struct mp_output_chain *p, const char *target,
+                             struct mp_filter_command *cmd);
+
+// Perform a seek reset _and_ reset all filter failure states, so that future
+// filtering continues normally.
+void mp_output_chain_reset_harder(struct mp_output_chain *p);
+
+// Try to exchange the filter list. If creation of any filter fails, roll
+// back the changes, and return false.
+struct m_obj_settings;
+bool mp_output_chain_update_filters(struct mp_output_chain *p,
+                                    struct m_obj_settings *list);
+