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VP9 SVC: Write out svc src for all spatial layers.

Change-Id: Ie78676e4df75f3f870ee2de0c87a8167b7ec68e0

--- a/vp9/encoder/vp9_encoder.c

+++ b/vp9/encoder/vp9_encoder.c

@@ -84,6 +84,9 @@

 #ifdef OUTPUT_YUV_REC

 FILE *yuv_rec_file;

 #endif

+#ifdef OUTPUT_YUV_SVC_SRC

+FILE *yuv_svc_src[3] = { NULL, NULL, NULL };

+#endif

 #if 0

 FILE *framepsnr;

@@ -2250,6 +2253,11 @@

 #ifdef OUTPUT_YUV_REC

   yuv_rec_file = fopen("rec.yuv", "wb");

 #endif

+#ifdef OUTPUT_YUV_SVC_SRC

+  yuv_svc_src[0] = fopen("svc_src_0.yuv", "wb");

+  yuv_svc_src[1] = fopen("svc_src_1.yuv", "wb");

+  yuv_svc_src[2] = fopen("svc_src_2.yuv", "wb");

+#endif

 #if 0

   framepsnr = fopen("framepsnr.stt", "a");

@@ -2568,6 +2576,11 @@

 #ifdef OUTPUT_YUV_REC

   fclose(yuv_rec_file);

 #endif

+#ifdef OUTPUT_YUV_SVC_SRC

+  fclose(yuv_svc_src[0]);

+  fclose(yuv_svc_src[1]);

+  fclose(yuv_svc_src[2]);

+#endif

 #if 0

@@ -3661,6 +3674,12 @@

         cm, cpi->un_scaled_source, &cpi->scaled_source, (cpi->oxcf.pass == 0),

         filter_scaler, phase_scaler);

   }

+#ifdef OUTPUT_YUV_SVC_SRC

+  // Write out at most 3 spatial layers.

+  if (is_one_pass_cbr_svc(cpi) && cpi->svc.spatial_layer_id < 3) {

+    vpx_write_yuv_frame(yuv_svc_src[cpi->svc.spatial_layer_id], cpi->Source);

+  }

+#endif

   // Unfiltered raw source used in metrics calculation if the source

   // has been filtered.

   if (is_psnr_calc_enabled(cpi)) {

--- a/vpx_util/vpx_write_yuv_frame.c

+++ b/vpx_util/vpx_write_yuv_frame.c

@@ -13,7 +13,7 @@

 void vpx_write_yuv_frame(FILE *yuv_file, YV12_BUFFER_CONFIG *s) {

 #if defined(OUTPUT_YUV_SRC) || defined(OUTPUT_YUV_DENOISED) || \

-    defined(OUTPUT_YUV_SKINMAP)

+    defined(OUTPUT_YUV_SKINMAP) || defined(OUTPUT_YUV_SVC_SRC)

   unsigned char *src = s->y_buffer;

   int h = s->y_crop_height;