fftools/ffmpeg: remove the input_streams global

Replace it with an array of streams in each InputFile. This is a more
accurate reflection of the actual relationship between InputStream and
InputFile.

Analogous to what was previously done to output streams in
7ef7a22251b852faab9404c85399ba8ac5dfbdc3.

1 files changed, 11 insertions, 5 deletions

diff --git a/fftools/ffmpeg.h b/fftools/ffmpeg.h
index b1e466406d..5fc3b2d3d4 100644
--- a/fftools/ffmpeg.h
+++ b/fftools/ffmpeg.h
@@ -437,7 +437,6 @@ typedef struct InputFile {
     AVFormatContext *ctx;
     int eof_reached;      /* true if eof reached */
     int eagain;           /* true if last read attempt returned EAGAIN */
-    int ist_index;        /* index of first stream in input_streams */
     int64_t input_ts_offset;
     int input_sync_ref;
     /**
@@ -452,8 +451,13 @@ typedef struct InputFile {
     int64_t last_ts;
     int64_t start_time;   /* user-specified start time in AV_TIME_BASE or AV_NOPTS_VALUE */
     int64_t recording_time;
-    int nb_streams;       /* number of stream that ffmpeg is aware of; may be different
-                             from ctx.nb_streams if new streams appear during av_read_frame() */
+
+    /* streams that ffmpeg is aware of;
+     * there may be extra streams in ctx that are not mapped to an InputStream
+     * if new streams appear dynamically during demuxing */
+    InputStream **streams;
+    int        nb_streams;
+
     int rate_emu;
     float readrate;
     int accurate_seek;
@@ -629,8 +633,6 @@ typedef struct OutputFile {
     int bitexact;
 } OutputFile;
 
-extern InputStream **input_streams;
-extern int        nb_input_streams;
 extern InputFile   **input_files;
 extern int        nb_input_files;
 
@@ -766,6 +768,10 @@ void ifile_close(InputFile **f);
  */
 int ifile_get_packet(InputFile *f, AVPacket **pkt);
 
+/* iterate over all input streams in all input files;
+ * pass NULL to start iteration */
+InputStream *ist_iter(InputStream *prev);
+
 #define SPECIFIER_OPT_FMT_str  "%s"
 #define SPECIFIER_OPT_FMT_i    "%i"
 #define SPECIFIER_OPT_FMT_i64  "%"PRId64