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, 7 insertions, 4 deletions

diff --git a/media/libstagefright/codecs/on2/dec/SoftVPX.cpp b/media/libstagefright/codecs/on2/dec/SoftVPX.cpp
index 87d6961..8a95643 100644
--- a/media/libstagefright/codecs/on2/dec/SoftVPX.cpp
+++ b/media/libstagefright/codecs/on2/dec/SoftVPX.cpp
@@ -40,10 +40,13 @@ SoftVPX::SoftVPX(
       mMode(codingType == OMX_VIDEO_CodingVP8 ? MODE_VP8 : MODE_VP9),
       mCtx(NULL),
       mImg(NULL) {
-    initPorts(kNumBuffers, 768 * 1024 /* inputBufferSize */,
-            kNumBuffers,
-            codingType == OMX_VIDEO_CodingVP8 ? MEDIA_MIMETYPE_VIDEO_VP8 : MEDIA_MIMETYPE_VIDEO_VP9);
-
+    // arbitrary from avc/hevc as vpx does not specify a min compression ratio
+    const size_t kMinCompressionRatio = mMode == MODE_VP8 ? 2 : 4;
+    const char *mime = mMode == MODE_VP8 ? MEDIA_MIMETYPE_VIDEO_VP8 : MEDIA_MIMETYPE_VIDEO_VP9;
+    const size_t kMaxOutputBufferSize = 2048 * 2048 * 3 / 2;
+    initPorts(
+            kNumBuffers, kMaxOutputBufferSize / kMinCompressionRatio /* inputBufferSize */,
+            kNumBuffers, mime, kMinCompressionRatio);
     CHECK_EQ(initDecoder(), (status_t)OK);
 }