shithub: dav1d

Info  •  Files  •  Log  •  Branches

dav1dplay: add --untimed for benchmarking purposes

Useful to test the effects of performance changes to the
decoding/rendering loop as a whole.

--- a/examples/dav1dplay.c

+++ b/examples/dav1dplay.c

@@ -50,6 +50,7 @@

 typedef struct {

     const char *inputfile;

     int highquality;

+    int untimed;

 } Dav1dPlaySettings;

 #define WINDOW_WIDTH  910

@@ -650,6 +651,7 @@

     fprintf(stderr, "Usage: %s [options]\n\n", app);

     fprintf(stderr, "Supported options:\n"

             " --input/-i  $file:    input file\n"

+            " --untimed/-u:         ignore PTS, render as fast as possible\n"

             " --framethreads $num:  number of frame threads (default: 1)\n"

             " --tilethreads $num:   number of tile threads (default: 1)\n"

             " --highquality:        enable high quality rendering\n"

@@ -676,7 +678,7 @@

     Dav1dSettings *lib_settings = &rd_ctx->lib_settings;

     // Short options

-    static const char short_opts[] = "i:v";

+    static const char short_opts[] = "i:vu";

     enum {

         ARG_FRAME_THREADS = 256,

@@ -688,6 +690,7 @@

     static const struct option long_opts[] = {

         { "input",          1, NULL, 'i' },

         { "version",        0, NULL, 'v' },

+        { "untimed",        0, NULL, 'u' },

         { "framethreads",   1, NULL, ARG_FRAME_THREADS },

         { "tilethreads",    1, NULL, ARG_TILE_THREADS },

         { "highquality",    0, NULL, ARG_HIGH_QUALITY },

@@ -702,6 +705,9 @@

             case 'v':

                 fprintf(stderr, "%s\n", dav1d_version());

                 exit(0);

+            case 'u':

+                settings->untimed = true;

+                break;

             case ARG_HIGH_QUALITY:

                 settings->highquality = true;

 #ifndef HAVE_PLACEBO_VULKAN

@@ -865,10 +871,14 @@

     int32_t wait_time = (pts_diff * rd_ctx->timebase) * 1000 - ticks_diff;

     rd_ctx->last_pts = rd_ctx->current_pts;

+    // In untimed mode, simply don't wait

+    if (rd_ctx->settings.untimed)

+        wait_time = 0;

+

     // This way of timing the playback is not accurate, as there is no guarantee

     // that SDL_Delay will wait for exactly the requested amount of time so in a

     // accurate player this would need to be done in a better way.

-    if (wait_time >= 0) {

+    if (wait_time > 0) {

         SDL_Delay(wait_time);

     } else if (wait_time < -10) { // Do not warn for minor time drifts

         fprintf(stderr, "Frame displayed %f seconds too late\n", wait_time/(float)1000);