FRAME_SIZE: Never exceed maximum frame dimensions.

Encoder:
Use oxcf->width/heigth instead of cm->width/height in sequence header.
aom_internal_error() if cm->width/height is larger than max values.

Decoder:
aom_internal_error() if cm->width/height is larger than max values.

Change-Id: I8d8b415efe82d961dbe34377f4da79379cb111a8

av1/decoder/decodeframe.c

diff --git a/av1/decoder/decodeframe.c b/av1/decoder/decodeframe.c
index 5a5bb9a..84e8119 100644
--- a/av1/decoder/decodeframe.c
+++ b/av1/decoder/decodeframe.c
@@ -1478,6 +1478,11 @@
     int num_bits_width = cm->seq_params.num_bits_width;
     int num_bits_height = cm->seq_params.num_bits_height;
     av1_read_frame_size(rb, num_bits_width, num_bits_height, &width, &height);
+    if (width > cm->seq_params.max_frame_width ||
+        height > cm->seq_params.max_frame_height) {
+      aom_internal_error(&cm->error, AOM_CODEC_CORRUPT_FRAME,
+                         "Frame dimensions are larger than the maximum values");
+    }
   } else {
     width = cm->seq_params.max_frame_width;
     height = cm->seq_params.max_frame_height;

av1/encoder/bitstream.c

diff --git a/av1/encoder/bitstream.c b/av1/encoder/bitstream.c
index 9a43666..f964d3b 100644
--- a/av1/encoder/bitstream.c
+++ b/av1/encoder/bitstream.c
@@ -3503,15 +3503,15 @@
 }
 
 #if CONFIG_REFERENCE_BUFFER || CONFIG_OBU
-void write_sequence_header(AV1_COMMON *const cm,
-                           struct aom_write_bit_buffer *wb) {
+void write_sequence_header(AV1_COMP *cpi, struct aom_write_bit_buffer *wb) {
+  AV1_COMMON *const cm = &cpi->common;
   SequenceHeader *seq_params = &cm->seq_params;
 
 #if CONFIG_FRAME_SIZE
   int num_bits_width = 16;
   int num_bits_height = 16;
-  int max_frame_width = cm->width;
-  int max_frame_height = cm->height;
+  int max_frame_width = cpi->oxcf.width;
+  int max_frame_height = cpi->oxcf.height;
 
   seq_params->num_bits_width = num_bits_width;
   seq_params->num_bits_height = num_bits_height;
@@ -3727,7 +3727,7 @@
 
   if (frame_is_intra_only(cm)) {
 #if CONFIG_REFERENCE_BUFFER
-    write_sequence_header(cm, wb);
+    write_sequence_header(cpi, wb);
 #endif  // CONFIG_REFERENCE_BUFFER
   }
 #if CONFIG_REFERENCE_BUFFER
@@ -3739,6 +3739,11 @@
 #endif  // CONFIG_REFERENCE_BUFFER
 
 #if CONFIG_FRAME_SIZE
+  if (cm->width > cm->seq_params.max_frame_width ||
+      cm->height > cm->seq_params.max_frame_height) {
+    aom_internal_error(&cm->error, AOM_CODEC_UNSUP_BITSTREAM,
+                       "Frame dimensions are larger than the maximum values");
+  }
   int frame_size_override_flag =
       (cm->width != cm->seq_params.max_frame_width ||
        cm->height != cm->seq_params.max_frame_height);
@@ -4043,6 +4048,11 @@
 #endif  // CONFIG_REFERENCE_BUFFER
 
 #if CONFIG_FRAME_SIZE
+  if (cm->width > cm->seq_params.max_frame_width ||
+      cm->height > cm->seq_params.max_frame_height) {
+    aom_internal_error(&cm->error, AOM_CODEC_UNSUP_BITSTREAM,
+                       "Frame dimensions are larger than the maximum values");
+  }
   int frame_size_override_flag =
       (cm->width != cm->seq_params.max_frame_width ||
        cm->height != cm->seq_params.max_frame_height);
@@ -4628,7 +4638,7 @@
 
   aom_wb_write_literal(&wb, 0, 4);
 
-  write_sequence_header(cm, &wb);
+  write_sequence_header(cpi, &wb);
 
   // color_config
   write_bitdepth_colorspace_sampling(cm, &wb);

av1/encoder/bitstream.h

diff --git a/av1/encoder/bitstream.h b/av1/encoder/bitstream.h
index 0dbc488..69e0500 100644
--- a/av1/encoder/bitstream.h
+++ b/av1/encoder/bitstream.h
@@ -21,8 +21,7 @@
 struct aom_write_bit_buffer;
 
 #if CONFIG_REFERENCE_BUFFER
-void write_sequence_header(AV1_COMMON *const cm,
-                           struct aom_write_bit_buffer *wb);
+void write_sequence_header(AV1_COMP *cpi, struct aom_write_bit_buffer *wb);
 #endif
 
 #if CONFIG_OBU