FFmpeg

Commit Graph

Author	SHA1	Message	Date
wm4	9940459720	mmaldec: fix pkt_dts determination This also drops setting the frame->pts field. This is usually not set by decoders, so this would be an inconsistency that's at worst a danger to the API user. It appears the buffer->dts field is normally not set by the MMAL decoder, so don't use it. If it's ever going to be set by MMAL, we don't know whether the value will be what we want. Signed-off-by: Luca Barbato <lu_zero@gentoo.org>	10 years ago
wm4	87a051f976	lavc: allow asynchronous decoders to return correct pkt_dts values The generic code in utils.c sets the AVFrame.pkt_dts field from the packet it was supposedly decoded. This does not have to be true for a fully asynchronous decoder like mmaldec. It could be overwritten with an incorrect value. Even if the decoder doesn't determine the DTS (but sets it to AV_NOPTS_VALUE), it's impossible to determine a correct value in utils.c. Decoders can now be marked with FF_CODEC_CAP_SETS_PKT_DTS, in which case utils.c won't overwrite the field. The decoders are expected to set this field (even if they only set it to AV_NOPTS_VALUE). Signed-off-by: Luca Barbato <lu_zero@gentoo.org>	10 years ago
wm4	b7ab6e18ee	mmaldec: disable timestamp interpolation This MMAL feature fills in missing timestamps from the framerate set on the input port. This is generally unwanted, since libavcodec decoders merely pass through timestamps without ever "fixing" them. The framerate is also unknown, and even the timebase doesn't have to be set. Signed-off-by: Luca Barbato <lu_zero@gentoo.org>	10 years ago
wm4	6b652c0273	mmaldec: fix problems with flush logic Don't try to do a blocking wait for MMAL output if we haven't even sent a single real packet, but only flush packets. Obviously we can't expect to get anything back. Additionally, don't send a flush packet to MMAL in the same case. It appears the MMAL decoder will sometimes hang in mmal_vc_port_disable() (called from ffmmal_close_decoder()), waiting for a reply from the GPU which never arrives. Either MMAL disallows sending flush packets without preceding real data, or it's a MMAL bug. Signed-off-by: Luca Barbato <lu_zero@gentoo.org>	10 years ago
wm4	b84675d63a	mmaldec: hack against buffering problems on broken input I can't come up with a nice way to handle this. It's hard to keep the lock-stepped input/output in this case. You can't predict whether the MMAL decoder will output a picture (because it's asynchronous), so you have to assume in general that any packet could produce 0 or 1 frames. You can't continue to write input packets to the decoder, because then you might get too many output frames, which you can't get rid of because the lavc decoding API does not allow the decoder to return an output frame without consuming an input frame (except when flushing). The ideal fix is a M:N decoding API (preferably asynchronous), which would make this code potentially much cleaner. For now, this hack will do. Signed-off-by: Luca Barbato <lu_zero@gentoo.org>	10 years ago
wm4	67db57ea12	mmaldec: fix problems with flush logic Don't try to do a blocking wait for MMAL output if we haven't even sent a single real packet, but only flush packets. Obviously we can't expect to get anything back. Additionally, don't send a flush packet to MMAL in the same case. It appears the MMAL decoder will sometimes hang in mmal_vc_port_disable() (called from ffmmal_close_decoder()), waiting for a reply from the GPU which never arrives. Either MMAL disallows sending flush packets without preceding real data, or it's a MMAL bug.	10 years ago
wm4	7f116973d5	mmaldec: do not mutate user's AVCodecContext extradata field	10 years ago
wm4	750f72d775	mmaldec: hack against buffering problems on broken input I can't come up with a nice way to handle this. It's hard to keep the lock-stepped input/output in this case. You can't predict whether the MMAL decoder will output a picture (because it's asynchronous), so you have to assume in general that any packet could produce 0 or 1 frames. You can't continue to write input packets to the decoder, because then you might get too many output frames, which you can't get rid of because the lavc decoding API does not allow the decoder to return an output frame without consuming an input frame (except when flushing). The ideal fix is a M:N decoding API (preferably asynchronous), which would make this code potentially much cleaner. For now, this hack will do.	10 years ago
Vittorio Giovara	def97856de	lavc: AV-prefix all codec capabilities Express bitfields more simply. Signed-off-by: Vittorio Giovara <vittorio.giovara@gmail.com>	10 years ago
wm4	49e531ff47	mmal: Reference MMAL VC lib explicitly This is optional, but ensures that linking with -Wl,--as-needed does not drop the library containing the MMAL VC driver. The driver normally "registers" itself in the library constructor, but since no symbols are explicitly referenced, the linker could remove it with --as-needed enabled. Signed-off-by: Diego Biurrun <diego@biurrun.de>	10 years ago
wm4	2de7650451	mmal: Move system headers before local headers Signed-off-by: Diego Biurrun <diego@biurrun.de>	10 years ago
wm4	c48456166e	lavc: add MMAL hardware decoder wrapper Based on a patch by Rodger Combs. Signed-off-by: Anton Khirnov <anton@khirnov.net>	10 years ago

19 Commits (0cfdaf45c41ab62bef7f74c12950d755a26a301b)