stagefright: misc fixes to software video encoders (and decoders)

- move logic to set encoder parameters to common encoder class
  (similarly to what was done for decoders)
- set compressed buffer size based on frame size and compression ratio,
  and codec-specific minimum size
- set raw buffer size based on frame size and metadata mode
- do not set stride and slice height on compressed ports
- advertise only QCIF support for google H263 encoder
- set large-enough input size for video decoders to support adaptive
  playback
- do not change input buffer size on output port reconfiguration, as
  no input buffer reallocation takes place
- do not return empty buffers with EOS after EOS has been signaled

Bug: 18513091
Bug: 18639027
Change-Id: Ib13492ef66adf331aa4572c67d2b283ea020cb41

1 files changed, 4 insertions, 2 deletions

diff --git a/media/libstagefright/codecs/on2/h264dec/SoftAVC.cpp b/media/libstagefright/codecs/on2/h264dec/SoftAVC.cpp
index 168208f..6b8b395 100644
--- a/media/libstagefright/codecs/on2/h264dec/SoftAVC.cpp
+++ b/media/libstagefright/codecs/on2/h264dec/SoftAVC.cpp
@@ -64,9 +64,11 @@ SoftAVC::SoftAVC(
       mHeadersDecoded(false),
       mEOSStatus(INPUT_DATA_AVAILABLE),
       mSignalledError(false) {
+    const size_t kMinCompressionRatio = 2;
+    const size_t kMaxOutputBufferSize = 2048 * 2048 * 3 / 2;
     initPorts(
-            kNumInputBuffers, 8192 /* inputBufferSize */,
-            kNumOutputBuffers, MEDIA_MIMETYPE_VIDEO_AVC);
+            kNumInputBuffers, kMaxOutputBufferSize / kMinCompressionRatio /* minInputBufferSize */,
+            kNumOutputBuffers, MEDIA_MIMETYPE_VIDEO_AVC, kMinCompressionRatio);
 
     CHECK_EQ(initDecoder(), (status_t)OK);
 }