#include "PL_H264Decoder.h"
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#include <H264VideoRTPSource.hh> // for SPropRecord
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#include <libbase64.h>
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extern "C"
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{
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#include <libavcodec/avcodec.h>
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#include <libavutil/frame.h>
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#include <libavformat/avformat.h>
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}
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struct H264Decoder_Internal
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{
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//uint8_t buffer[1920*1080*3];
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//size_t buffSize;
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//size_t buffSizeMax;
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bool fmtp_set_to_context;
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bool payError;
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AVCodecContext* pAVCodecContext;
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AVFrame* pAVFrame;//#todo delete
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H264Decoder_Internal() :
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//buffSize(0), buffSizeMax(sizeof(buffer)),
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fmtp_set_to_context(false),
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payError(true),
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pAVCodecContext(nullptr), pAVFrame(nullptr)
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{
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}
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~H264Decoder_Internal()
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{
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}
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void reset()
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{
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//buffSize = 0;
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fmtp_set_to_context = false;
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payError = true;
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}
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};
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PipeLineElem* create_PL_H264Decoder()
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{
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return new PL_H264Decoder;
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}
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PL_H264Decoder::PL_H264Decoder() : internal(new H264Decoder_Internal)
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{
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}
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PL_H264Decoder::~PL_H264Decoder()
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{
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delete (H264Decoder_Internal*)internal;
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internal= nullptr;
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}
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bool PL_H264Decoder::init(void* args)
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{
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H264Decoder_Internal* in = (H264Decoder_Internal*)internal;
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in->reset();
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return true;
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}
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void PL_H264Decoder::finit()
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{
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H264Decoder_Internal* in = (H264Decoder_Internal*)internal;
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}
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SPropRecord* parseSPropParameterSets(char const* sPropParameterSetsStr, size_t& numSPropRecords) {
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// Make a copy of the input string, so we can replace the commas with '\0's:
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char* inStr = strDup(sPropParameterSetsStr);
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if (inStr == NULL) {
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numSPropRecords = 0;
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return NULL;
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}
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// Count the number of commas (and thus the number of parameter sets):
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numSPropRecords = 1;
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char* s;
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for (s = inStr; *s != '\0'; ++s) {
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if (*s == ',') {
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++numSPropRecords;
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*s = '\0';
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}
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}
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// Allocate and fill in the result array:
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SPropRecord* resultArray = new SPropRecord[numSPropRecords];
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s = inStr;
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for (unsigned i = 0; i < numSPropRecords; ++i) {
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resultArray[i].sPropBytes = new uint8_t[256];
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size_t sPropLength = 0;
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base64_decode(s, strlen(s), (char*)resultArray[i].sPropBytes, &sPropLength, 0);
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resultArray[i].sPropLength = sPropLength;
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s += strlen(s) + 1;
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}
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delete[] inStr;
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return resultArray;
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}
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bool initH264DecoderEnv(H264Decoder_Internal* in,
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uint8_t* sps, size_t spsSize, uint8_t* pps, size_t ppsSize)
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{
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av_register_all();
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// find the video encoder
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AVCodec* avCodec = avcodec_find_decoder(AV_CODEC_ID_H264);
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if (!avCodec)
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{
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printf("codec not found!\n");
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return false;
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}
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in->pAVCodecContext = avcodec_alloc_context3(avCodec);
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in->pAVCodecContext->time_base.num = 1;
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in->pAVCodecContext->frame_number = 1;
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in->pAVCodecContext->codec_type = AVMEDIA_TYPE_VIDEO;
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in->pAVCodecContext->bit_rate = 0;
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in->pAVCodecContext->time_base.den = 25;
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in->pAVCodecContext->width = 1920;
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in->pAVCodecContext->height = 1080;
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if (in->pAVCodecContext->extradata == NULL)
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{
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int totalsize = 0;
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unsigned char* tmp = NULL;
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unsigned char nalu_header[4] = { 0, 0, 0, 1 };
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totalsize = 8 + spsSize + ppsSize;
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tmp = new unsigned char[totalsize];
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memcpy(tmp, nalu_header, 4);
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memcpy(tmp + 4, sps, spsSize);
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memcpy(tmp + 4 + spsSize, nalu_header, 4);
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memcpy(tmp + 4 + spsSize + 4, pps, ppsSize);
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in->pAVCodecContext->extradata_size = totalsize;
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in->pAVCodecContext->extradata = tmp;
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}
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if(avcodec_open2(in->pAVCodecContext, avCodec, NULL) >= 0)
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in->pAVFrame = av_frame_alloc();// Allocate video frame
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else
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return false;
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return true;
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}
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bool decodeH264(H264Decoder_Internal* in, uint8_t* buffer, size_t buffSize)
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{
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AVPacket packet = {0};
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int frameFinished = buffSize;
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if (av_packet_from_data(&packet, buffer, buffSize) != 0)
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{
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printf("av_packet_from_data error\n");
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return false;
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}
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// decode
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avcodec_decode_video2(in->pAVCodecContext, in->pAVFrame, &frameFinished, &packet);
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if(frameFinished)
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{
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// decode ok
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return true;
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}
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else
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{
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printf("incomplete frame\n");
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return false;
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}
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}
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bool PL_H264Decoder::pay(const PipeMaterial& pm)
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{
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H264Decoder_Internal* in = (H264Decoder_Internal*)internal;
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in->payError = true;
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if (!in->fmtp_set_to_context)
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{
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if (manager == NULL)
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return false;
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std::string fmtp(manager->get_global_param(PLGP_RTSP_FMTP));
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if (fmtp.empty())
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return false;
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size_t numSPropRecords = 0;
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SPropRecord *p_record = parseSPropParameterSets(fmtp.c_str(), numSPropRecords);
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if (numSPropRecords < 2)
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return false;//#todo log
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SPropRecord &sps = p_record[0];
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SPropRecord &pps = p_record[1];
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bool ret = initH264DecoderEnv(in, sps.sPropBytes, sps.sPropLength, pps.sPropBytes, pps.sPropLength);
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if (!ret)
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return false; // #todo log
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else
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in->fmtp_set_to_context = true;
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}
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bool ret = decodeH264(in, pm.buffer, pm.buffSize);
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in->payError = !ret;
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return ret;
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}
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bool PL_H264Decoder::gain(PipeMaterial& pm)
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{
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H264Decoder_Internal* in = (H264Decoder_Internal*)internal;
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if (!in->payError)
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{
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pm.buffer = (uint8_t*)in->pAVFrame;//in->buffer;
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pm.buffSize = sizeof(uint8_t*);//in->buffSize;
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}
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pm.former = this;
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return !in->payError;
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}
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