Hi, jwillcox and here
Since B1014614 had landed at the end of October, I am back to work on B969395
where I want to follow what B101614 is done to access Android HW Video
acceleration through standard MediaCodec API directly instead of using lower
level undocumented native mediacodec api.
But, I had some problems when using generated MediaCodec.h .cpp in
/media/webrtc/signaling.
I include MediaCodec.h in WebrtcMediaCodecVP8VideoCodec.cpp under
media/webrtc/signaling/src/media-conduit directory and use some API implemented
in MediaCodec.cpp.
When I try to build it, compiler gives me some errors related to "internal
string" roles breaks shown as bellows:
---------------------------------
0:09.17 In file included from ../../../../dist/include/nsAString.h:11:0,
0:09.17 from ../../../../dist/include/nsSubstring.h:10,
0:09.17 from ../../../../dist/include/nsString.h:12,
0:09.17 from ../../../../dist/include/nsGeoPosition.h:12,
0:09.17 from ../../../../dist/include/AndroidJavaWrappers.h:13,
0:09.17 from ../../../../dist/include/MediaCodec.h:9,
0:09.17 from
/home/luq/Dev/firefox/src/src/media/webrtc/signaling/src/media-conduit/WebrtcMediaCodecVP8VideoCodec.cpp:12:
0:09.17 ../../../../dist/include/nsStringFwd.h:15:2: error: #error Internal
string headers are not available from external-linkage code.
0:09.18 In file included from ../../../../dist/include/nsAString.h:23:0,
0:09.18 from ../../../../dist/include/nsSubstring.h:10,
0:09.18 from ../../../../dist/include/nsString.h:12,
0:09.18 from ../../../../dist/include/nsGeoPosition.h:12,
0:09.18 from ../../../../dist/include/AndroidJavaWrappers.h:13,
0:09.18 from ../../../../dist/include/MediaCodec.h:9,
0:09.18 from
/home/luq/Dev/firefox/src/src/media/webrtc/signaling/src/media-conduit/WebrtcMediaCodecVP8VideoCodec.cpp:12:
0:09.18 ../../../../dist/include/nsTSubstring.h:12:2: error: #error Cannot use
internal string classes without MOZILLA_INTERNAL_API defined. Use the frozen
header nsStringAPI.h instead.
0:09.18 In file included from ../../../../dist/include/nsAString.h:28:0,
0:09.18 from ../../../../dist/include/nsSubstring.h:10,
0:09.18 from ../../../../dist/include/nsString.h:12,
0:09.18 from ../../../../dist/include/nsGeoPosition.h:12,
0:09.18 from ../../../../dist/include/AndroidJavaWrappers.h:13,
0:09.18 from ../../../../dist/include/MediaCodec.h:9,
0:09.18 from
/home/luq/Dev/firefox/src/src/media/webrtc/signaling/src/media-conduit/WebrtcMediaCodecVP8VideoCodec.cpp:12:
0:09.18 ../../../../dist/include/nsTSubstring.h:12:2: error: #error Cannot use
internal string classes without MOZILLA_INTERNAL_API defined. Use the frozen
header nsStringAPI.h instead.
---------------------------------
And I try to resolve it by following
"XPCOM glue",
https://developer.mozilla.org/en-US/docs/Mozilla/Tech/XPCOM/Glue
"Migrating from Internal Linkage to Frozen Linkage",
https://developer.mozilla.org/en-US/docs/Migrating_from_Internal_Linkage_to_Frozen_Linkage
, but I couldn't get any hints from those docs.
So, could you please guide me how can I use MediaCodec related API directly in
my case?
[1] https://bugzilla.mozilla.org/show_bug.cgi?id=1014614
[2] https://bugzilla.mozilla.org/show_bug.cgi?id=969395
BR,
Lu Qiang
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