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Fix handling of 3 byte Annex B start sequences

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This commit is contained in:
Cameron Gutman 2022-09-05 19:10:44 -05:00
parent 661edf2466
commit f91787793e
2 changed files with 7 additions and 7 deletions
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2
moonlight-common-c

@ -1 +1 @@
Subproject commit 6001ece0b8bfcea6a8122a3e56f48f515e1aaaf5
Subproject commit e453a4d548559e216703a4f501ceede9b4952e12

12
viddec.cpp
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@ -221,24 +221,24 @@ void MoonlightInstance::VidDecCleanup(void) {
}
static void WriteSpsNalu(PLENTRY nalu, unsigned char* outBuffer, unsigned int* offset) {
const char naluHeader[] = {0x00, 0x00, 0x00, 0x01};
int start_len = nalu->data[2] == 0x01 ? 3 : 4;
h264_stream_t* stream = h264_new();
// Read the old NALU
read_nal_unit(stream,
(unsigned char *)&nalu->data[sizeof(naluHeader)],
nalu->length - sizeof(naluHeader));
(unsigned char *)&nalu->data[start_len],
nalu->length - start_len);
// Fixup the SPS to what OS X needs to use hardware acceleration
stream->sps->num_ref_frames = 1;
stream->sps->vui.max_dec_frame_buffering = 1;
// Copy the NALU prefix over from the original SPS
memcpy(&outBuffer[*offset], naluHeader, sizeof(naluHeader));
*offset += sizeof(naluHeader);
memcpy(&outBuffer[*offset], nalu->data, start_len);
*offset += start_len;
// Copy the modified NALU data
*offset += write_nal_unit(stream, &outBuffer[*offset], nalu->length + 32 - sizeof(naluHeader));
*offset += write_nal_unit(stream, &outBuffer[*offset], nalu->length + 32 - start_len);
h264_free(stream);
}