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va: vp9enc: Adjust the coded buffer size to avoid failure

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Some extreme case such as "videotestsrc pattern=1" can generate pure
white noise videoes, for which encoder may generate too big output
for current coded buffer size. We now consider the qindex and bitrate
to avoid that.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/6483>
This commit is contained in:
He Junyan 2024-03-29 18:26:49 +08:00 committed by Víctor Manuel Jáquez Leal
parent 2560f4c581
commit 9c3bd3950e
1 changed files with 17 additions and 2 deletions
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19
subprojects/gst-plugins-bad/sys/va/gstvavp9enc.c
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@ -1754,8 +1754,23 @@ _vp9_calculate_coded_size (GstVaVp9Enc * self)
}
codedbuf_size = codedbuf_size + (codedbuf_size * (self->depth - 8) / 8);
/* FIXME: Just use a rough 1/2 min compression ratio here. */
codedbuf_size = codedbuf_size / 2;
if (self->rc.rc_ctrl_mode == VA_RC_CQP || self->rc.rc_ctrl_mode == VA_RC_ICQ) {
if (self->rc.base_qindex > DEFAULT_BASE_QINDEX)
codedbuf_size = codedbuf_size / 2;
} else if (self->rc.max_bitrate_bits > 0) {
guint64 frame_sz = gst_util_uint64_scale (self->rc.max_bitrate_bits / 8,
GST_VIDEO_INFO_FPS_D (&base->input_state->info),
GST_VIDEO_INFO_FPS_N (&base->input_state->info));
/* FIXME: If average frame size is smaller than 1/10 coded buffer size,
we shrink the coded buffer size to 1/2 to improve performance. */
if (frame_sz * 10 < codedbuf_size)
codedbuf_size = codedbuf_size / 2;
} else {
/* FIXME: Just use a rough 1/2 min compression ratio here. */
codedbuf_size = codedbuf_size / 2;
}
base->codedbuf_size = codedbuf_size;