video: remove user-controllable PTS sorting (--pts-association-mode)

Useless. Sometimes it might be useful to make some extremely broken
files work, but on the other hand --no-correct-pts is sufficient for
these cases.

While we still need some of the code for AVI, the "auto" mode in
particular inflated the size of the code.

2 files changed, 5 insertions, 57 deletions

diff --git a/video/decode/dec_video.c b/video/decode/dec_video.c
index 384f1b2643..0d97e397b2 100644
--- a/video/decode/dec_video.c
+++ b/video/decode/dec_video.c
@@ -67,8 +67,6 @@ void video_reset_decoding(struct dec_video *d_video)
     d_video->decoded_pts = MP_NOPTS_VALUE;
     d_video->codec_pts = MP_NOPTS_VALUE;
     d_video->codec_dts = MP_NOPTS_VALUE;
-    d_video->sorted_pts = MP_NOPTS_VALUE;
-    d_video->unsorted_pts = MP_NOPTS_VALUE;
 }
 
 int video_vd_control(struct dec_video *d_video, int cmd, void *arg)
@@ -228,57 +226,14 @@ static void add_pts_to_sort(struct dec_video *d_video, double pts)
     }
 }
 
-// Return true if pts1 comes before pts2. pts1 can be MP_NOPTS_VALUE, but pts2
-// always has to be valid. pts1 can't be equal or larger than pts2.
-#define PTS_IS_ORDERED(pts1, pts2) \
-    ((pts2) != MP_NOPTS_VALUE && ((pts1) == MP_NOPTS_VALUE || ((pts1) < (pts2))))
-
 static double retrieve_sorted_pts(struct dec_video *d_video, double codec_pts)
 {
-    struct MPOpts *opts = d_video->opts;
-
-    double sorted_pts;
     if (d_video->num_buffered_pts) {
         d_video->num_buffered_pts--;
-        sorted_pts = d_video->buffered_pts[d_video->num_buffered_pts];
-    } else {
-        MP_ERR(d_video, "No pts value from demuxer to use for frame!\n");
-        sorted_pts = MP_NOPTS_VALUE;
-    }
-
-    if (!PTS_IS_ORDERED(d_video->sorted_pts, sorted_pts))
-        d_video->num_sorted_pts_problems++;
-    d_video->sorted_pts = sorted_pts;
-
-    if (!PTS_IS_ORDERED(d_video->unsorted_pts, codec_pts))
-        d_video->num_unsorted_pts_problems++;
-    d_video->unsorted_pts = codec_pts;
-
-    if (d_video->header->video->avi_dts) {
-        // Actually, they don't need to be sorted, we just reuse the buffering.
-        d_video->pts_assoc_mode = 2;
-    } else if (opts->user_pts_assoc_mode) {
-        d_video->pts_assoc_mode = opts->user_pts_assoc_mode;
-    } else if (d_video->pts_assoc_mode == 0) {
-        if (codec_pts != MP_NOPTS_VALUE)
-            d_video->pts_assoc_mode = 1;
-        else
-            d_video->pts_assoc_mode = 2;
-    } else {
-        int probcount1 = d_video->num_unsorted_pts_problems;
-        int probcount2 = d_video->num_sorted_pts_problems;
-        if (d_video->pts_assoc_mode == 2) {
-            int tmp = probcount1;
-            probcount1 = probcount2;
-            probcount2 = tmp;
-        }
-        if (probcount1 >= probcount2 * 1.5 + 2) {
-            d_video->pts_assoc_mode = 3 - d_video->pts_assoc_mode;
-            MP_WARN(d_video, "Switching to pts association mode %d.\n",
-                    d_video->pts_assoc_mode);
-        }
+        return d_video->buffered_pts[d_video->num_buffered_pts];
     }
-    return d_video->pts_assoc_mode == 1 ? codec_pts : sorted_pts;
+    MP_ERR(d_video, "No pts value from demuxer to use for frame!\n");
+    return MP_NOPTS_VALUE;
 }
 
 struct mp_image *video_decode(struct dec_video *d_video,
@@ -286,9 +241,7 @@ struct mp_image *video_decode(struct dec_video *d_video,
                               int drop_frame)
 {
     struct MPOpts *opts = d_video->opts;
-    bool sort_pts =
-        (opts->user_pts_assoc_mode != 1 || d_video->header->video->avi_dts)
-        && opts->correct_pts;
+    bool sort_pts = d_video->header->video->avi_dts && opts->correct_pts;
 
     struct demux_packet packet_copy;
     if (packet && packet->dts == MP_NOPTS_VALUE) {
diff --git a/video/decode/dec_video.h b/video/decode/dec_video.h
index 69e2a44e40..d40405afb9 100644
--- a/video/decode/dec_video.h
+++ b/video/decode/dec_video.h
@@ -55,14 +55,9 @@ struct dec_video {
     double codec_dts;
     int num_codec_dts_problems;
 
-    // PTS sorting (obscure, non-default)
+    // PTS sorting (needed for AVI-style timestamps)
     double buffered_pts[32];
     int num_buffered_pts;
-    double sorted_pts;
-    int num_sorted_pts_problems;
-    double unsorted_pts;
-    int num_unsorted_pts_problems;
-    int pts_assoc_mode;
 
     // PTS or DTS of packet last read
     double last_packet_pdts;