diff --git a/media/codec2/components/aom/C2SoftAomDec.cpp b/media/codec2/components/aom/C2SoftAomDec.cpp
index 36137e6..c7046cb 100644
--- a/media/codec2/components/aom/C2SoftAomDec.cpp
+++ b/media/codec2/components/aom/C2SoftAomDec.cpp
@@ -29,6 +29,8 @@
 
 namespace android {
 
+constexpr size_t kMinInputBufferSize = 2 * 1024 * 1024;
+
 // codecname set and passed in as a compile flag from Android.bp
 constexpr char COMPONENT_NAME[] = CODECNAME;
 
@@ -112,7 +114,7 @@
         addParameter(
             DefineParam(mMaxInputSize, C2_PARAMKEY_INPUT_MAX_BUFFER_SIZE)
                 .withDefault(
-                    new C2StreamMaxBufferSizeInfo::input(0u, 320 * 240 * 3 / 4))
+                    new C2StreamMaxBufferSizeInfo::input(0u, kMinInputBufferSize))
                 .withFields({
                     C2F(mMaxInputSize, value).any(),
                 })
@@ -192,8 +194,8 @@
         const C2P<C2StreamMaxPictureSizeTuning::output>& maxSize) {
         (void)mayBlock;
         // assume compression ratio of 2
-        me.set().value = (((maxSize.v.width + 63) / 64) *
-                          ((maxSize.v.height + 63) / 64) * 3072);
+        me.set().value = c2_max((((maxSize.v.width + 63) / 64)
+                * ((maxSize.v.height + 63) / 64) * 3072), kMinInputBufferSize);
         return C2R::Ok();
     }
     static C2R DefaultColorAspectsSetter(bool mayBlock, C2P<C2StreamColorAspectsTuning::output> &me) {
diff --git a/media/codec2/components/avc/C2SoftAvcDec.cpp b/media/codec2/components/avc/C2SoftAvcDec.cpp
index fa98178..2662f0f 100644
--- a/media/codec2/components/avc/C2SoftAvcDec.cpp
+++ b/media/codec2/components/avc/C2SoftAvcDec.cpp
@@ -31,7 +31,7 @@
 namespace android {
 
 namespace {
-
+constexpr size_t kMinInputBufferSize = 2 * 1024 * 1024;
 constexpr char COMPONENT_NAME[] = "c2.android.avc.decoder";
 constexpr uint32_t kDefaultOutputDelay = 8;
 constexpr uint32_t kMaxOutputDelay = 16;
@@ -114,7 +114,7 @@
 
         addParameter(
                 DefineParam(mMaxInputSize, C2_PARAMKEY_INPUT_MAX_BUFFER_SIZE)
-                .withDefault(new C2StreamMaxBufferSizeInfo::input(0u, 320 * 240 * 3 / 4))
+                .withDefault(new C2StreamMaxBufferSizeInfo::input(0u, kMinInputBufferSize))
                 .withFields({
                     C2F(mMaxInputSize, value).any(),
                 })
@@ -227,7 +227,8 @@
                                   const C2P<C2StreamMaxPictureSizeTuning::output> &maxSize) {
         (void)mayBlock;
         // assume compression ratio of 2
-        me.set().value = (((maxSize.v.width + 15) / 16) * ((maxSize.v.height + 15) / 16) * 192);
+        me.set().value = c2_max((((maxSize.v.width + 15) / 16)
+                * ((maxSize.v.height + 15) / 16) * 192), kMinInputBufferSize);
         return C2R::Ok();
     }
 
diff --git a/media/codec2/components/mpeg2/C2SoftMpeg2Dec.cpp b/media/codec2/components/mpeg2/C2SoftMpeg2Dec.cpp
index a1f8ff3..e0365fc 100644
--- a/media/codec2/components/mpeg2/C2SoftMpeg2Dec.cpp
+++ b/media/codec2/components/mpeg2/C2SoftMpeg2Dec.cpp
@@ -29,7 +29,7 @@
 #include "impeg2d.h"
 
 namespace android {
-
+constexpr size_t kMinInputBufferSize = 2 * 1024 * 1024;
 constexpr char COMPONENT_NAME[] = "c2.android.mpeg2.decoder";
 
 class C2SoftMpeg2Dec::IntfImpl : public SimpleInterface<void>::BaseParams {
@@ -99,7 +99,7 @@
 
         addParameter(
                 DefineParam(mMaxInputSize, C2_PARAMKEY_INPUT_MAX_BUFFER_SIZE)
-                .withDefault(new C2StreamMaxBufferSizeInfo::input(0u, 320 * 240 * 3 / 2))
+                .withDefault(new C2StreamMaxBufferSizeInfo::input(0u, kMinInputBufferSize))
                 .withFields({
                     C2F(mMaxInputSize, value).any(),
                 })
@@ -213,7 +213,8 @@
                                   const C2P<C2StreamMaxPictureSizeTuning::output> &maxSize) {
         (void)mayBlock;
         // assume compression ratio of 1
-        me.set().value = (((maxSize.v.width + 15) / 16) * ((maxSize.v.height + 15) / 16) * 384);
+        me.set().value = c2_max((((maxSize.v.width + 15) / 16)
+                * ((maxSize.v.height + 15) / 16) * 384), kMinInputBufferSize);
         return C2R::Ok();
     }
 
diff --git a/media/codec2/components/mpeg4_h263/C2SoftMpeg4Dec.cpp b/media/codec2/components/mpeg4_h263/C2SoftMpeg4Dec.cpp
index 7e6685e..61b286c 100644
--- a/media/codec2/components/mpeg4_h263/C2SoftMpeg4Dec.cpp
+++ b/media/codec2/components/mpeg4_h263/C2SoftMpeg4Dec.cpp
@@ -33,7 +33,7 @@
 #include "mp4dec_api.h"
 
 namespace android {
-
+constexpr size_t kMinInputBufferSize = 2 * 1024 * 1024;
 #ifdef MPEG4
 constexpr char COMPONENT_NAME[] = "c2.android.mpeg4.decoder";
 #else
@@ -149,11 +149,7 @@
 
         addParameter(
                 DefineParam(mMaxInputSize, C2_PARAMKEY_INPUT_MAX_BUFFER_SIZE)
-#ifdef MPEG4
-                .withDefault(new C2StreamMaxBufferSizeInfo::input(0u, 1920 * 1088 * 3 / 2))
-#else
-                .withDefault(new C2StreamMaxBufferSizeInfo::input(0u, 352 * 288 * 3 / 2))
-#endif
+                .withDefault(new C2StreamMaxBufferSizeInfo::input(0u, kMinInputBufferSize))
                 .withFields({
                     C2F(mMaxInputSize, value).any(),
                 })
@@ -218,7 +214,8 @@
                                   const C2P<C2StreamMaxPictureSizeTuning::output> &maxSize) {
         (void)mayBlock;
         // assume compression ratio of 1
-        me.set().value = (((maxSize.v.width + 15) / 16) * ((maxSize.v.height + 15) / 16) * 384);
+        me.set().value = c2_max((((maxSize.v.width + 15) / 16)
+                * ((maxSize.v.height + 15) / 16) * 384), kMinInputBufferSize);
         return C2R::Ok();
     }
 
diff --git a/media/codec2/components/vpx/C2SoftVpxDec.cpp b/media/codec2/components/vpx/C2SoftVpxDec.cpp
index a52ca15..62076f8 100644
--- a/media/codec2/components/vpx/C2SoftVpxDec.cpp
+++ b/media/codec2/components/vpx/C2SoftVpxDec.cpp
@@ -30,7 +30,7 @@
 #include "C2SoftVpxDec.h"
 
 namespace android {
-
+constexpr size_t kMinInputBufferSize = 2 * 1024 * 1024;
 #ifdef VP9
 constexpr char COMPONENT_NAME[] = "c2.android.vp9.decoder";
 #else
@@ -166,7 +166,7 @@
 
         addParameter(
                 DefineParam(mMaxInputSize, C2_PARAMKEY_INPUT_MAX_BUFFER_SIZE)
-                .withDefault(new C2StreamMaxBufferSizeInfo::input(0u, 320 * 240 * 3 / 4))
+                .withDefault(new C2StreamMaxBufferSizeInfo::input(0u, kMinInputBufferSize))
                 .withFields({
                     C2F(mMaxInputSize, value).any(),
                 })
@@ -244,7 +244,8 @@
                                   const C2P<C2StreamMaxPictureSizeTuning::output> &maxSize) {
         (void)mayBlock;
         // assume compression ratio of 2
-        me.set().value = (((maxSize.v.width + 63) / 64) * ((maxSize.v.height + 63) / 64) * 3072);
+        me.set().value = c2_max((((maxSize.v.width + 63) / 64)
+                * ((maxSize.v.height + 63) / 64) * 3072), kMinInputBufferSize);
         return C2R::Ok();
     }