96 lines
2.5 KiB
C++
96 lines
2.5 KiB
C++
// RFC 9328 RTP Payload Format for Versatile Video Coding(VVC)
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#include "mpeg4-vvc.h"
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#include "sdp-payload.h"
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#include "base64.h"
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#include <stdio.h>
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#include <stdint.h>
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#include <stdlib.h>
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#include <string.h>
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#include <assert.h>
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#include <errno.h>
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int sdp_h266(uint8_t *data, int bytes, const char* proto, unsigned short port, int payload, int frequence, const void* extra, int extra_size)
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{
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static const char* pattern =
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"m=video %hu %s %d\r\n"
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"a=rtpmap:%d H266/90000\r\n"
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"a=fmtp:%d";
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const uint8_t nalu[] = { 13/*dci*/, 14/*vps*/, 15/*sps*/, 16/*pps*/ };
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const char* sprop[] = { "sprop-dci", "sprop-vps", "sprop-sps", "sprop-pps" };
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int r, n;
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int i, j, k;
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struct mpeg4_vvc_t vvc;
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assert(90000 == frequence);
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r = mpeg4_vvc_decoder_configuration_record_load((const uint8_t*)extra, extra_size, &vvc);
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if (r < 0)
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return r;
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n = snprintf((char*)data, bytes, pattern, port, proto && *proto ? proto : "RTP/AVP", payload, payload, payload);
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for (i = 0; i < sizeof(nalu) / sizeof(nalu[0]) && n < bytes; i++)
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{
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if (i > 0 && n < bytes) data[n++] = ';';
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n += snprintf((char*)data + n, bytes - n, " %s=", sprop[i]);
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for (k = j = 0; j < vvc.numOfArrays; j++)
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{
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assert(vvc.nalu[j].bytes > 2 && vvc.nalu[j].type == ((vvc.nalu[j].data[1] >> 3) & 0x1F));
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if (nalu[i] != vvc.nalu[j].type)
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continue;
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if (n + 1 + vvc.nalu[j].bytes * 2 > bytes)
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return -ENOMEM; // don't have enough memory
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if (k++ > 0 && n < bytes) data[n++] = ',';
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n += (int)base64_encode((char*)data + n, vvc.nalu[j].data, vvc.nalu[j].bytes);
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}
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}
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if (n + 2 > bytes)
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return -ENOMEM; // don't have enough memory
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data[n++] = '\r';
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data[n++] = '\n';
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return n;
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}
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int sdp_h266_load(uint8_t* data, int bytes, const char* vps, const char* sps, const char* pps, const char* sei, const char* dci)
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{
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int i, n, len, off;
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const char* p, * next;
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const char* sprops[5];
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const uint8_t startcode[] = { 0x00, 0x00, 0x00, 0x01 };
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off = 0;
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sprops[0] = vps;
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sprops[1] = sps;
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sprops[2] = pps;
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sprops[3] = sei;
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sprops[4] = dci;
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for (i = 0; i < sizeof(sprops) / sizeof(sprops[0]); i++)
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{
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p = sprops[i];
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while (p)
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{
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next = strchr(p, ',');
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len = next ? (int)(next - p) : (int)strlen(p);
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if (off + (len + 3) / 4 * 3 + (int)sizeof(startcode) > bytes)
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return -ENOMEM; // don't have enough space
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memcpy(data + off, startcode, sizeof(startcode));
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n = (int)base64_decode(data + off + sizeof(startcode), p, len);
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assert(n <= (len + 3) / 4 * 3);
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off += n + sizeof(startcode);
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p = next ? next + 1 : NULL;
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}
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}
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return off;
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}
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