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mac-vth264: Manually mark priority bits for frames 

This commit is the mac-vth264 version of edfc2be in obs-qsv11.
master
Ryan Foster 2019-10-27 01:05:54 -04:00
parent c56de17bdb
commit 30d29618b1
1 changed files with 36 additions and 0 deletions
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36
plugins/mac-vth264/encoder.c
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@ -1,5 +1,6 @@
#include <obs-module.h>
#include <util/darray.h>
#include <obs-avc.h>
#include <CoreFoundation/CoreFoundation.h>
#include <VideoToolbox/VideoToolbox.h>
@ -671,6 +672,10 @@ static bool is_sample_keyframe(CMSampleBufferRef buffer)
static bool parse_sample(struct vt_h264_encoder *enc, CMSampleBufferRef buffer,
struct encoder_packet *packet, CMTime off)
{
uint8_t *start;
uint8_t *end;
int type;
CMTime pts = CMSampleBufferGetPresentationTimeStamp(buffer);
CMTime dts = CMSampleBufferGetDecodeTimeStamp(buffer);
@ -703,6 +708,37 @@ static bool parse_sample(struct vt_h264_encoder *enc, CMSampleBufferRef buffer,
packet->size = enc->packet_data.num;
packet->keyframe = keyframe;
/* ------------------------------------ */
start = enc->packet_data.array;
end = start + enc->packet_data.num;
start = (uint8_t *)obs_avc_find_startcode(start, end);
while (true) {
while (start < end && !*(start++))
;
if (start == end)
break;
type = start[0] & 0x1F;
if (type == OBS_NAL_SLICE_IDR || type == OBS_NAL_SLICE) {
uint8_t prev_type = (start[0] >> 5) & 0x3;
start[0] &= ~(3 << 5);
if (type & OBS_NAL_SLICE)
start[0] |= OBS_NAL_PRIORITY_HIGHEST << 5;
else if (type & OBS_NAL_SLICE_IDR)
start[0] |= OBS_NAL_PRIORITY_HIGH << 5;
else
start[0] |= prev_type << 5;
}
start = (uint8_t *)obs_avc_find_startcode(start, end);
}
/* ------------------------------------ */
CFRelease(buffer);
return true;