Multiple-resolution encoder

The example encoder down-samples the input video frames a number of
times with a down-sampling factor, and then encodes and outputs
bitstreams with different resolutions.

Support arbitrary down-sampling factor, and down-sampling factor
can be different for each encoding level.

For example, the encoder can be tested as follows.
1. Configure with multi-resolution encoding enabled:
../libvpx/configure --target=x86-linux-gcc --disable-codecs
--enable-vp8 --enable-runtime_cpu_detect --enable-debug
--disable-install-docs --enable-error-concealment
--enable-multi-res-encoding
2. Run make
3. Encode:
If input video is 1280x720, run:
./vp8_multi_resolution_encoder 1280 720 input.yuv 1.ivf 2.ivf 3.ivf 1
(output: 1.ivf(1280x720); 2.ivf(640x360); 3.ivf(320x180).
The last parameter is set to 1/0 to show/not show PSNR.)
4. Decode:
./simple_decoder 1.ivf 1.yuv
./simple_decoder 2.ivf 2.yuv
./simple_decoder 3.ivf 3.yuv
5. View video:
mplayer 1.yuv -demuxer rawvideo -rawvideo w=1280:h=720 -loop 0 -fps 30
mplayer 2.yuv -demuxer rawvideo -rawvideo w=640:h=360 -loop 0 -fps 30
mplayer 3.yuv -demuxer rawvideo -rawvideo w=320:h=180 -loop 0 -fps 30

The encoding parameters can be modified in vp8_multi_resolution_encoder.c,
for example, target bitrate, frame rate...

Modified API. John helped a lot with that. Thanks!

Change-Id: I03be9a51167eddf94399f92d269599fb3f3d54f5

1 files changed, 0 insertions, 51 deletions

diff --git a/vp8/encoder/rdopt.c b/vp8/encoder/rdopt.c
index 379ffe0a8..62a2cfc53 100644
--- a/vp8/encoder/rdopt.c
+++ b/vp8/encoder/rdopt.c
@@ -1463,57 +1463,6 @@ static int vp8_rd_pick_best_mbsegmentation(VP8_COMP *cpi, MACROBLOCK *x,
     return bsi.segment_rd;
 }
 
-static void insertsortmv(int arr[], int len)
-{
-    int i, j, k;
-
-    for ( i = 1 ; i <= len-1 ; i++ )
-    {
-        for ( j = 0 ; j < i ; j++ )
-        {
-            if ( arr[j] > arr[i] )
-            {
-                int temp;
-
-                temp = arr[i];
-
-                for ( k = i; k >j; k--)
-                    arr[k] = arr[k - 1] ;
-
-                arr[j] = temp ;
-            }
-        }
-    }
-}
-
-static void insertsortsad(int arr[],int idx[], int len)
-{
-    int i, j, k;
-
-    for ( i = 1 ; i <= len-1 ; i++ )
-    {
-        for ( j = 0 ; j < i ; j++ )
-        {
-            if ( arr[j] > arr[i] )
-            {
-                int temp, tempi;
-
-                temp = arr[i];
-                tempi = idx[i];
-
-                for ( k = i; k >j; k--)
-                {
-                    arr[k] = arr[k - 1] ;
-                    idx[k] = idx[k - 1];
-                }
-
-                arr[j] = temp ;
-                idx[j] = tempi;
-            }
-        }
-    }
-}
-
 //The improved MV prediction
 void vp8_mv_pred
 (