[FFmpeg-devel] [PATCH 4/4] libavcodec/dev: v4l2: add support for v4l2 mem2mem codecs

Michael Niedermayer michael at niedermayer.cc
Wed Jul 26 17:04:40 EEST 2017

On Mon, Jul 24, 2017 at 09:08:49PM +0200, Jorge Ramirez-Ortiz wrote:
> From: Alexis Ballier <aballier at gentoo.org>
> This patchset enhances Alexis Ballier's original patch and validates
> it using Qualcomm's Venus hardware (driver recently landed upstream
> [1]).
> This has been tested on Qualcomm's DragonBoard 410c and 820c
> ffplay tested video decoders:
> - h264,
> - vp8
> - mpeg4
> Some of the changes introduced:
> - v4l2: some cleanup of the code.
> - v4l2: some cleaup before upstreaming.
> - v4l2: follow the new decode api.
> - v4l2: fix display size for NV12 output pool.
> - v4l2: handle EOS.
> - v4l2: fix vp8 and mpeg4 decoding.
> - v4l2: generate EOF on dequeue errors.
> - v4l2: h264_mp4toannexb filtering.
> [1] https://lwn.net/Articles/697956/

this with the other patches breaks build
CC      libavcodec/v4l2-buffers.o
CC      libavcodec/v4l2_m2m_enc.o
libavcodec/v4l2_m2m_enc.c: In function ‘v4lm2m_encode_init’:
libavcodec/v4l2_m2m_enc.c:150:103: error: ‘V4L2_CID_MPEG_VIDEO_VPX_MIN_QP’ undeclared (first use in this function)
             SET_V4L_EXT_CTRL(value, V4L2_CID_MPEG_VIDEO_VPX_MIN_QP, avctx->qmin, V4L2_CTRL_CLASS_MPEG, "minimum video quantizer scale");
libavcodec/v4l2_m2m_enc.c:150:103: note: each undeclared identifier is reported only once for each function it appears in
libavcodec/v4l2_m2m_enc.c:151:103: error: ‘V4L2_CID_MPEG_VIDEO_VPX_MAX_QP’ undeclared (first use in this function)
             SET_V4L_EXT_CTRL(value, V4L2_CID_MPEG_VIDEO_VPX_MAX_QP, avctx->qmax, V4L2_CTRL_CLASS_MPEG, "maximum video quantizer scale");
make: *** [libavcodec/v4l2_m2m_enc.o] Error 1
libavcodec/v4l2-buffers.c: In function ‘avpriv_init_v4lbufpool’:
libavcodec/v4l2-buffers.c:276:9: warning: unknown conversion type character ‘y’ in format [-Wformat=]
         av_log(bufs->log_ctx, AV_LOG_ERROR, "%type %i not supported\n", bufs->type);
libavcodec/v4l2-buffers.c: In function ‘avpkt_to_v4lbuf’:
libavcodec/v4l2-buffers.c:414:22: error: ‘V4L2_BUF_FLAG_LAST’ undeclared (first use in this function)
         out->flags = V4L2_BUF_FLAG_LAST;
libavcodec/v4l2-buffers.c:414:22: note: each undeclared identifier is reported only once for each function it appears in
libavcodec/v4l2-buffers.c: In function ‘v4lbuf_to_avpkt’:
libavcodec/v4l2-buffers.c:464:5: warning: ‘av_free_packet’ is deprecated (declared at libavcodec/avcodec.h:4621) [-Wdeprecated-declarations]
make: *** [libavcodec/v4l2-buffers.o] Error 1
make: Target `all' not remade because of errors.

Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

The educated differ from the uneducated as much as the living from the
dead. -- Aristotle 
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