From 10f891696bc4c972c13cc9fde2c53470501a03e2 Mon Sep 17 00:00:00 2001
From: Frank Galligan <fgalligan@google.com>
Date: Wed, 11 Dec 2013 09:06:35 -0800
Subject: Add support to pass in external frame buffers.

VP9 decoder can now use frame buffers passed in by the application.

Change-Id: I599527ec85c577f3f5552831d79a693884fafb73
---
 vp9/common/vp9_alloccommon.c | 22 ++++++++++++++++++----
 vp9/common/vp9_onyxc_int.h   | 13 +++++++++----
 vp9/common/vp9_reconinter.c  |  2 +-
 3 files changed, 28 insertions(+), 9 deletions(-)

(limited to 'vp9/common')

diff --git a/vp9/common/vp9_alloccommon.c b/vp9/common/vp9_alloccommon.c
index f56784071..6c333c5ef 100644
--- a/vp9/common/vp9_alloccommon.c
+++ b/vp9/common/vp9_alloccommon.c
@@ -34,7 +34,7 @@ void vp9_update_mode_info_border(VP9_COMMON *cm, MODE_INFO *mi) {
 void vp9_free_frame_buffers(VP9_COMMON *cm) {
   int i;
 
-  for (i = 0; i < FRAME_BUFFERS; i++)
+  for (i = 0; i < cm->fb_count; i++)
     vp9_free_frame_buffer(&cm->yv12_fb[i]);
 
   vp9_free_frame_buffer(&cm->post_proc_buffer);
@@ -86,7 +86,7 @@ int vp9_resize_frame_buffers(VP9_COMMON *cm, int width, int height) {
   int mi_size;
 
   if (vp9_realloc_frame_buffer(&cm->post_proc_buffer, width, height, ss_x, ss_y,
-                             VP9BORDERINPIXELS) < 0)
+                               VP9BORDERINPIXELS, NULL, NULL, NULL) < 0)
     goto fail;
 
   set_mb_mi(cm, aligned_width, aligned_height);
@@ -138,16 +138,24 @@ int vp9_alloc_frame_buffers(VP9_COMMON *cm, int width, int height) {
   const int ss_y = cm->subsampling_y;
   int mi_size;
 
+  if (cm->fb_count == 0) {
+    cm->fb_count = FRAME_BUFFERS;
+    CHECK_MEM_ERROR(cm, cm->yv12_fb,
+                    vpx_calloc(cm->fb_count, sizeof(*cm->yv12_fb)));
+    CHECK_MEM_ERROR(cm, cm->fb_idx_ref_cnt,
+                    vpx_calloc(cm->fb_count, sizeof(*cm->fb_idx_ref_cnt)));
+  }
+
   vp9_free_frame_buffers(cm);
 
-  for (i = 0; i < FRAME_BUFFERS; i++) {
+  for (i = 0; i < cm->fb_count; i++) {
     cm->fb_idx_ref_cnt[i] = 0;
     if (vp9_alloc_frame_buffer(&cm->yv12_fb[i], width, height, ss_x, ss_y,
                                VP9BORDERINPIXELS) < 0)
       goto fail;
   }
 
-  cm->new_fb_idx = FRAME_BUFFERS - 1;
+  cm->new_fb_idx = cm->fb_count - 1;
   cm->fb_idx_ref_cnt[cm->new_fb_idx] = 1;
 
   for (i = 0; i < REFS_PER_FRAME; i++)
@@ -203,6 +211,12 @@ void vp9_create_common(VP9_COMMON *cm) {
 
 void vp9_remove_common(VP9_COMMON *cm) {
   vp9_free_frame_buffers(cm);
+
+  vpx_free(cm->yv12_fb);
+  vpx_free(cm->fb_idx_ref_cnt);
+
+  cm->yv12_fb = NULL;
+  cm->fb_idx_ref_cnt = NULL;
 }
 
 void vp9_initialize_common() {
diff --git a/vp9/common/vp9_onyxc_int.h b/vp9/common/vp9_onyxc_int.h
index 975a1d52a..db1ca3db3 100644
--- a/vp9/common/vp9_onyxc_int.h
+++ b/vp9/common/vp9_onyxc_int.h
@@ -113,8 +113,8 @@ typedef struct VP9Common {
 
   YV12_BUFFER_CONFIG *frame_to_show;
 
-  YV12_BUFFER_CONFIG yv12_fb[FRAME_BUFFERS];
-  int fb_idx_ref_cnt[FRAME_BUFFERS]; /* reference counts */
+  YV12_BUFFER_CONFIG *yv12_fb;
+  int *fb_idx_ref_cnt; /* reference counts */
   int ref_frame_map[REF_FRAMES]; /* maps fb_idx to reference slot */
 
   // TODO(jkoleszar): could expand active_ref_idx to 4, with 0 as intra, and
@@ -213,6 +213,11 @@ typedef struct VP9Common {
   int frame_parallel_decoding_mode;
 
   int log2_tile_cols, log2_tile_rows;
+
+  vpx_codec_frame_buffer_t *fb_list;  // External frame buffers
+  int fb_count;  // Total number of frame buffers
+  vpx_realloc_frame_buffer_cb_fn_t realloc_fb_cb;
+  void *user_priv;  // Private data associated with the external frame buffers.
 } VP9_COMMON;
 
 // ref == 0 => LAST_FRAME
@@ -228,11 +233,11 @@ static YV12_BUFFER_CONFIG *get_frame_new_buffer(VP9_COMMON *cm) {
 
 static int get_free_fb(VP9_COMMON *cm) {
   int i;
-  for (i = 0; i < FRAME_BUFFERS; i++)
+  for (i = 0; i < cm->fb_count; i++)
     if (cm->fb_idx_ref_cnt[i] == 0)
       break;
 
-  assert(i < FRAME_BUFFERS);
+  assert(i < cm->fb_count);
   cm->fb_idx_ref_cnt[i] = 1;
   return i;
 }
diff --git a/vp9/common/vp9_reconinter.c b/vp9/common/vp9_reconinter.c
index e8247679c..24f7b597f 100644
--- a/vp9/common/vp9_reconinter.c
+++ b/vp9/common/vp9_reconinter.c
@@ -288,7 +288,7 @@ void vp9_setup_scale_factors(VP9_COMMON *cm, int i) {
   const int ref = cm->active_ref_idx[i];
   struct scale_factors *const sf = &cm->active_ref_scale[i];
   struct scale_factors_common *const sfc = &cm->active_ref_scale_comm[i];
-  if (ref >= FRAME_BUFFERS) {
+  if (ref >= cm->fb_count) {
     vp9_zero(*sf);
     vp9_zero(*sfc);
   } else {
-- 
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