deps-libff: Add extern "C" to all headers

deps/libff/libff/ff-callbacks.h

@@ -21,6 +21,10 @@
 #include <libavcodec/avcodec.h>
 #include <stdbool.h>
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 typedef bool (*ff_callback_frame)(struct ff_frame *frame, void *opaque);
 typedef bool (*ff_callback_format)(AVCodecContext *codec_context, void *opaque);
 typedef bool (*ff_callback_initialize)(void *opaque);
@@ -44,3 +48,7 @@ bool ff_callbacks_frame_initialize(struct ff_frame *frame,
 		struct ff_callbacks *callbacks);
 bool ff_callbacks_frame_free(struct ff_frame *frame,
 		struct ff_callbacks *callbacks);
+
+#ifdef __cplusplus
+}
+#endif

deps/libff/libff/ff-circular-queue.h

@@ -16,6 +16,10 @@
 
 #pragma once
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 #include <pthread.h>
 #include <libavutil/mem.h>
 #include <stdbool.h>
@@ -48,3 +52,7 @@ void *ff_circular_queue_peek_write(struct ff_circular_queue *cq);
 void ff_circular_queue_advance_write(struct ff_circular_queue *cq, void *item);
 void *ff_circular_queue_peek_read(struct ff_circular_queue *cq);
 void ff_circular_queue_advance_read(struct ff_circular_queue *cq);
+
+#ifdef __cplusplus
+}
+#endif

deps/libff/libff/ff-clock.h

@@ -23,6 +23,10 @@
 #include <stdint.h>
 #include <pthread.h>
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 enum ff_av_sync_type {
 	AV_SYNC_AUDIO_MASTER,
 	AV_SYNC_VIDEO_MASTER,
@@ -55,3 +59,7 @@ void ff_clock_release(struct ff_clock **clock);
 int64_t ff_clock_start_time(struct ff_clock *clock);
 bool ff_clock_start(struct ff_clock *clock, enum ff_av_sync_type sync_type,
 		const bool *abort);
+
+#ifdef __cplusplus
+}
+#endif

deps/libff/libff/ff-decoder.h

@@ -24,6 +24,10 @@
 
 #include <stdbool.h>
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 struct ff_decoder {
 	AVCodecContext *codec;
 	AVStream *stream;
@@ -73,3 +77,7 @@ double ff_decoder_get_best_effort_pts(struct ff_decoder *decoder,
 
 bool ff_decoder_set_frame_drop_state(struct ff_decoder *decoder,
 		int64_t start_time, int64_t pts);
+
+#ifdef __cplusplus
+}
+#endif

deps/libff/libff/ff-demuxer.h

@@ -27,6 +27,10 @@
 
 #include "ff-callbacks.h"
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 struct ff_demuxer_options
 {
 	int audio_packet_queue_size;
@@ -82,3 +86,7 @@ void ff_demuxer_set_callbacks(struct ff_callbacks *callbacks,
 		void *opaque);
 
 void ff_demuxer_flush(struct ff_demuxer *demuxer);
+
+#ifdef __cplusplus
+}
+#endif

deps/libff/libff/ff-frame.h

@@ -20,6 +20,10 @@
 
 #include <libavcodec/avcodec.h>
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 struct ff_frame {
 	AVFrame *frame;
 	struct ff_clock *clock;
@@ -28,3 +32,7 @@ struct ff_frame {
 };
 
 typedef struct ff_frame ff_frame_t;
+
+#ifdef __cplusplus
+}
+#endif

deps/libff/libff/ff-packet-queue.h

@@ -26,6 +26,10 @@
 #define FF_PACKET_EMPTY 0
 #define FF_PACKET_SUCCESS 1
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 struct ff_packet {
 	AVPacket base;
 	ff_clock_t *clock;
@@ -58,3 +62,7 @@ int packet_queue_get(struct ff_packet_queue *q, struct ff_packet *packet,
 		bool block);
 
 void packet_queue_flush(struct ff_packet_queue *q);
+
+#ifdef __cplusplus
+}
+#endif

deps/libff/libff/ff-threading.h

@@ -16,5 +16,13 @@
 
 #pragma once
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 long ff_atomic_inc_long(volatile long *val);
 long ff_atomic_dec_long(volatile long *val);
+
+#ifdef __cplusplus
+}
+#endif

deps/libff/libff/ff-timer.h

@@ -20,6 +20,10 @@
 #include <pthread.h>
 #include <stdbool.h>
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 typedef void (*ff_timer_callback)(void *opaque);
 
 struct ff_timer {
@@ -43,3 +47,7 @@ bool ff_timer_init(struct ff_timer *timer,
 		ff_timer_callback callback, void *opaque);
 void ff_timer_free(struct ff_timer *timer);
 void ff_timer_schedule(struct ff_timer *timer, uint64_t microseconds);
+
+#ifdef __cplusplus
+}
+#endif