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msdk: set the right BRCParamMultiplier

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BRCParamMultiplier in mfxInfoMFX is a parameter which specifies a
multiplier for bitrate control parameters [1], it impacts TargetKbps,
MaxKbps, BufferSizeInKB and InitialDelayInKB.

[1]: https://software.intel.com/en-us/node/628473
This commit is contained in:
Haihao Xiang 2019-01-10 14:28:52 +08:00 committed by Víctor Manuel Jáquez Leal
parent 5fc160fa59
commit 9aa68dea51
1 changed files with 21 additions and 4 deletions
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25
sys/msdk/gstmsdkenc.c
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@ -151,8 +151,23 @@ ensure_bitrate_control (GstMsdkEnc * thiz)
mfx->RateControlMethod = thiz->rate_control;
/* No effect in CQP varient algorithms */
mfx->TargetKbps = thiz->bitrate;
mfx->MaxKbps = thiz->max_vbv_bitrate;
if ((mfx->RateControlMethod != MFX_RATECONTROL_CQP) &&
(thiz->bitrate > G_MAXUINT16 || thiz->max_vbv_bitrate > G_MAXUINT16)) {
mfxU32 max_val = MAX (thiz->max_vbv_bitrate, thiz->bitrate);
mfx->BRCParamMultiplier = (mfxU16) ((max_val + 0x10000) / 0x10000);
mfx->TargetKbps = (mfxU16) (thiz->bitrate / mfx->BRCParamMultiplier);
mfx->MaxKbps = (mfxU16) (thiz->max_vbv_bitrate / mfx->BRCParamMultiplier);
mfx->BufferSizeInKB =
(mfxU16) (mfx->BufferSizeInKB / mfx->BRCParamMultiplier);
/* Currently InitialDelayInKB is not used in this plugin */
mfx->InitialDelayInKB =
(mfxU16) (mfx->InitialDelayInKB / mfx->BRCParamMultiplier);
} else {
mfx->TargetKbps = thiz->bitrate;
mfx->MaxKbps = thiz->max_vbv_bitrate;
mfx->BRCParamMultiplier = 1;
}
switch (mfx->RateControlMethod) {
case MFX_RATECONTROL_CQP:
@ -488,13 +503,15 @@ gst_msdkenc_init_encoder (GstMsdkEnc * thiz)
thiz->tasks = g_new0 (MsdkEncTask, thiz->num_tasks);
for (i = 0; i < thiz->num_tasks; i++) {
thiz->tasks[i].output_bitstream.Data = _aligned_alloc (32,
thiz->param.mfx.BufferSizeInKB * 1024);
thiz->param.mfx.BufferSizeInKB * thiz->param.mfx.BRCParamMultiplier *
1024);
if (!thiz->tasks[i].output_bitstream.Data) {
GST_ERROR_OBJECT (thiz, "Memory allocation failed");
goto failed;
}
thiz->tasks[i].output_bitstream.MaxLength =
thiz->param.mfx.BufferSizeInKB * 1024;
thiz->param.mfx.BufferSizeInKB * thiz->param.mfx.BRCParamMultiplier *
1024;
}
thiz->next_task = 0;