shithub: libvpx

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Merge "vpxdec: support scaling output" into experimental

--- a/examples.mk

+++ b/examples.mk

@@ -31,6 +31,7 @@

 vpxdec.SRCS                 += nestegg/halloc/src/macros.h

 vpxdec.SRCS                 += nestegg/include/nestegg/nestegg.h

 vpxdec.SRCS                 += nestegg/src/nestegg.c

+vpxdec.SRCS                 += $(LIBYUV_SRCS)

 vpxdec.GUID                  = BA5FE66F-38DD-E034-F542-B1578C5FB950

 vpxdec.DESCRIPTION           = Full featured decoder

 UTILS-$(CONFIG_ENCODERS)    += vpxenc.c

--- a/vpxdec.c

+++ b/vpxdec.c

@@ -30,6 +30,7 @@

 #endif

 #include "tools_common.h"

 #include "nestegg/include/nestegg/nestegg.h"

+#include "third_party/libyuv/include/libyuv/scale.h"

 #if CONFIG_OS_SUPPORT

 #if defined(_MSC_VER)

@@ -93,6 +94,8 @@

                                             "Show version string");

 static const arg_def_t error_concealment = ARG_DEF(NULL, "error-concealment", 0,

                                                    "Enable decoder error-concealment");

+static const arg_def_t scalearg = ARG_DEF("S", "scale", 0,

+                                            "Scale output frames uniformly");

 #if CONFIG_MD5

@@ -102,7 +105,7 @@

 static const arg_def_t *all_args[] = {

   &codecarg, &use_yv12, &use_i420, &flipuvarg, &noblitarg,

   &progressarg, &limitarg, &skiparg, &postprocarg, &summaryarg, &outputfile,

-  &threadsarg, &verbosearg,

+  &threadsarg, &verbosearg, &scalearg,

 #if CONFIG_MD5

   &md5arg,

 #endif

@@ -708,6 +711,9 @@

   struct input_ctx        input = {0};

   int                     frames_corrupted = 0;

   int                     dec_flags = 0;

+  int                     do_scale;

+  int                     stream_w = 0, stream_h = 0;

+  vpx_image_t             *scaled_img = NULL;

   /* Parse command line */

   exec_name = argv_[0];

@@ -757,6 +763,8 @@

       cfg.threads = arg_parse_uint(&arg);

     else if (arg_match(&arg, &verbosearg, argi))

       quiet = 0;

+    else if (arg_match(&arg, &scalearg, argi))

+      do_scale = 1;

 #if CONFIG_VP8_DECODER

     else if (arg_match(&arg, &addnoise_level, argi)) {

@@ -1015,6 +1023,30 @@

       show_progress(frame_in, frame_out, dx_time);

     if (!noblit) {

+      if (do_scale) {

+        if (frame_out == 1) {

+          stream_w = img->d_w;

+          stream_h = img->d_h;

+          scaled_img = vpx_img_alloc(NULL, VPX_IMG_FMT_I420,

+                                     stream_w, stream_h, 16);

+        }

+        if (img && (img->d_w != stream_w || img->d_h != stream_h)) {

+          I420Scale(img->planes[VPX_PLANE_Y], img->stride[VPX_PLANE_Y],

+                    img->planes[VPX_PLANE_U], img->stride[VPX_PLANE_U],

+                    img->planes[VPX_PLANE_V], img->stride[VPX_PLANE_V],

+                    img->d_w, img->d_h,

+                    scaled_img->planes[VPX_PLANE_Y],

+                    scaled_img->stride[VPX_PLANE_Y],

+                    scaled_img->planes[VPX_PLANE_U],

+                    scaled_img->stride[VPX_PLANE_U],

+                    scaled_img->planes[VPX_PLANE_V],

+                    scaled_img->stride[VPX_PLANE_V],

+                    stream_w, stream_h,

+                    kFilterBox);

+          img = scaled_img;

+        }

+      }

+

       if (img) {

         unsigned int y;

         char out_fn[PATH_MAX];

-- 

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