fftools/ffmpeg: add thread-aware transcode scheduling infrastructure

See the comment block at the top of fftools/ffmpeg_sched.h for more
details on what this scheduler is for.

This commit adds the scheduling code itself, along with minimal
integration with the rest of the program:
* allocating and freeing the scheduler
* passing it throughout the call stack in order to register the
  individual components (demuxers/decoders/filtergraphs/encoders/muxers)
  with the scheduler

The scheduler is not actually used as of this commit, so it should not
result in any change in behavior. That will change in future commits.

1 files changed, 12 insertions, 0 deletions

diff --git a/fftools/ffmpeg_mux.h b/fftools/ffmpeg_mux.h
index a2bb4dfc7d..eee2b2cb07 100644
--- a/fftools/ffmpeg_mux.h
+++ b/fftools/ffmpeg_mux.h
@@ -24,6 +24,7 @@
 #include <stdatomic.h>
 #include <stdint.h>
 
+#include "ffmpeg_sched.h"
 #include "thread_queue.h"
 
 #include "libavformat/avformat.h"
@@ -50,6 +51,10 @@ typedef struct MuxStream {
 
     EncStats stats;
 
+    int sch_idx;
+    int sch_idx_enc;
+    int sch_idx_src;
+
     int64_t max_frames;
 
     /*
@@ -94,6 +99,13 @@ typedef struct Muxer {
 
     AVFormatContext *fc;
 
+    Scheduler   *sch;
+    unsigned     sch_idx;
+
+    // OutputStream indices indexed by scheduler stream indices
+    int         *sch_stream_idx;
+    int       nb_sch_stream_idx;
+
     pthread_t    thread;
     ThreadQueue *tq;