ffmpeg: implement -force_key_frames expression evalution

1 files changed, 14 insertions, 0 deletions

diff --git a/ffmpeg.h b/ffmpeg.h
index 9e2e97be30..c64a0153a1 100644
--- a/ffmpeg.h
+++ b/ffmpeg.h
@@ -41,6 +41,7 @@
 
 #include "libavutil/avutil.h"
 #include "libavutil/dict.h"
+#include "libavutil/eval.h"
 #include "libavutil/fifo.h"
 #include "libavutil/pixfmt.h"
 #include "libavutil/rational.h"
@@ -289,6 +290,17 @@ typedef struct InputFile {
 #endif
 } InputFile;
 
+enum forced_keyframes_const {
+    FKF_N,
+    FKF_N_FORCED,
+    FKF_PREV_FORCED_N,
+    FKF_PREV_FORCED_T,
+    FKF_T,
+    FKF_NB
+};
+
+extern const char *const forced_keyframes_const_names[];
+
 typedef struct OutputStream {
     int file_index;          /* file index */
     int index;               /* stream index in the output file */
@@ -320,6 +332,8 @@ typedef struct OutputStream {
     int forced_kf_count;
     int forced_kf_index;
     char *forced_keyframes;
+    AVExpr *forced_keyframes_pexpr;
+    double forced_keyframes_expr_const_values[FKF_NB];
 
     /* audio only */
     int audio_channels_map[SWR_CH_MAX];  /* list of the channels id to pick from the source stream */