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avcodec/v4l2_m2m_enc: Support changing qmin/qmax

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Hard coded parameters for qmin and qmax are currently used to initialize
v4l2_m2m device. This commit uses values from avctx->{qmin,qmax} if they
are set.

Reviewed-by: Ming Qian <ming.qian@nxp.com>
Signed-off-by: Andriy Gelman <andriy.gelman@gmail.com>
This commit is contained in:
Andriy Gelman 2020-01-19 01:06:12 -05:00
parent 79e3c4dd74
commit 486ed509bc
1 changed files with 19 additions and 4 deletions
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23
libavcodec/v4l2_m2m_enc.c
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@ -25,6 +25,7 @@
#include <sys/ioctl.h>
#include <search.h>
#include "libavcodec/avcodec.h"
#include "libavcodec/internal.h"
#include "libavutil/pixdesc.h"
#include "libavutil/pixfmt.h"
#include "libavutil/opt.h"
@ -252,11 +253,18 @@ static int v4l2_prepare_encoder(V4L2m2mContext *s)
return 0;
}
if (qmin != avctx->qmin || qmax != avctx->qmax)
av_log(avctx, AV_LOG_WARNING, "Encoder adjusted: qmin (%d), qmax (%d)\n", qmin, qmax);
if (avctx->qmin >= 0 && avctx->qmax >= 0 && avctx->qmin > avctx->qmax) {
av_log(avctx, AV_LOG_WARNING, "Invalid qmin:%d qmax:%d. qmin should not "
"exceed qmax\n", avctx->qmin, avctx->qmax);
} else {
qmin = avctx->qmin >= 0 ? avctx->qmin : qmin;
qmax = avctx->qmax >= 0 ? avctx->qmax : qmax;
}
v4l2_set_ext_ctrl(s, qmin_cid, qmin, "minimum video quantizer scale", 0);
v4l2_set_ext_ctrl(s, qmax_cid, qmax, "maximum video quantizer scale", 0);
v4l2_set_ext_ctrl(s, qmin_cid, qmin, "minimum video quantizer scale",
avctx->qmin >= 0);
v4l2_set_ext_ctrl(s, qmax_cid, qmax, "maximum video quantizer scale",
avctx->qmax >= 0);
return 0;
}
@ -369,6 +377,12 @@ static const AVOption options[] = {
{ NULL },
};
static const AVCodecDefault v4l2_m2m_defaults[] = {
{ "qmin", "-1" },
{ "qmax", "-1" },
{ NULL },
};
#define M2MENC_CLASS(NAME) \
static const AVClass v4l2_m2m_ ## NAME ## _enc_class = { \
.class_name = #NAME "_v4l2m2m_encoder", \
@ -390,6 +404,7 @@ static const AVOption options[] = {
.send_frame = v4l2_send_frame, \
.receive_packet = v4l2_receive_packet, \
.close = v4l2_encode_close, \
.defaults = v4l2_m2m_defaults, \
.capabilities = AV_CODEC_CAP_HARDWARE | AV_CODEC_CAP_DELAY, \
.wrapper_name = "v4l2m2m", \
};