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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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moonlight-common-c
+1 -1
Submodule moonlight-common-c updated: 6001ece0b8...e453a4d548
viddec.cpp
+6 -6
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@@ -221,24 +221,24 @@ void MoonlightInstance::VidDecCleanup(void) {
} }
static void WriteSpsNalu(PLENTRY nalu, unsigned char* outBuffer, unsigned int* offset) { 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(); h264_stream_t* stream = h264_new();
// Read the old NALU // Read the old NALU
read_nal_unit(stream, read_nal_unit(stream,
(unsigned char *)&nalu->data[sizeof(naluHeader)], (unsigned char *)&nalu->data[start_len],
nalu->length - sizeof(naluHeader)); nalu->length - start_len);
// Fixup the SPS to what OS X needs to use hardware acceleration // Fixup the SPS to what OS X needs to use hardware acceleration
stream->sps->num_ref_frames = 1; stream->sps->num_ref_frames = 1;
stream->sps->vui.max_dec_frame_buffering = 1; stream->sps->vui.max_dec_frame_buffering = 1;
// Copy the NALU prefix over from the original SPS // Copy the NALU prefix over from the original SPS
memcpy(&outBuffer[*offset], naluHeader, sizeof(naluHeader)); memcpy(&outBuffer[*offset], nalu->data, start_len);
*offset += sizeof(naluHeader); *offset += start_len;
// Copy the modified NALU data // 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); h264_free(stream);
} }