#include "PL_H264Encoder.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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#include "libavutil/imgutils.h"
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}
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struct H264Encoder_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 payError;
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bool ffmpegInited;
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size_t frameCount;
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AVCodecContext* pAVCodecContext;
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AVFrame* pAVFrame;//#todo delete
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H264Encoder_Internal() :
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buffSize(0), buffSizeMax(sizeof(buffer)),
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payError(true), ffmpegInited(false), frameCount(0),
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pAVCodecContext(nullptr), pAVFrame(nullptr)
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{
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}
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~H264Encoder_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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payError = true;
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ffmpegInited = false;
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frameCount = 0;
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pAVCodecContext = nullptr;
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pAVFrame = nullptr;
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}
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};
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PipeLineElem* create_PL_H264Encoder()
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{
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return new PL_H264Encoder;
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}
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PL_H264Encoder::PL_H264Encoder() : internal(new H264Encoder_Internal)
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{
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}
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PL_H264Encoder::~PL_H264Encoder()
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{
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delete (H264Encoder_Internal*)internal;
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internal= nullptr;
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}
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bool PL_H264Encoder::init(void* args)
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{
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H264Encoder_Internal* in = (H264Encoder_Internal*)internal;
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in->reset();
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return true;
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}
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void PL_H264Encoder::finit()
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{
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H264Encoder_Internal* in = (H264Encoder_Internal*)internal;
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}
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bool initH264EncoderEnv(H264Encoder_Internal* in)
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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_encoder(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->bit_rate = 3*1024*1024*8; // 3MB
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in->pAVCodecContext->width = 1920;
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in->pAVCodecContext->height = 1080;//#todo from config
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in->pAVCodecContext->time_base.num=1;
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in->pAVCodecContext->time_base.den=25;
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in->pAVCodecContext->gop_size = 20;
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in->pAVCodecContext->max_b_frames = 0;
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in->pAVCodecContext->pix_fmt = AV_PIX_FMT_YUV420P;
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if(avcodec_open2(in->pAVCodecContext, avCodec, NULL) >= 0)
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{
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in->pAVFrame = av_frame_alloc(); // Allocate video frame
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in->pAVFrame->format = in->pAVCodecContext->pix_fmt;
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in->pAVFrame->width = in->pAVCodecContext->width;
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in->pAVFrame->height = in->pAVCodecContext->height;
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int ret = av_image_alloc(in->pAVFrame->data, in->pAVFrame->linesize, in->pAVCodecContext->width, in->pAVCodecContext->height,
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in->pAVCodecContext->pix_fmt, 16);
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if (ret < 0)
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{
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printf("av_image_alloc error\n");
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return false;
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}
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}
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else
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{
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printf("avcodec_open2 error\n");
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return false;
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}
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return true;
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}
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void copyAVFrame(AVFrame* dest, AVFrame* src)
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{
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int height = dest->height;
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int width = dest->width;
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memcpy(dest->data[0], src->data[0], height * width); // Y
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memcpy(dest->data[1], src->data[1], height * width / 4); // U
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memcpy(dest->data[2], src->data[2], height * width / 4); // V
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}
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bool encodeH264(H264Encoder_Internal* in, AVFrame* pAVFrame, size_t buffSize)
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{
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in->buffSize = 0;
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in->frameCount++;
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copyAVFrame(in->pAVFrame, pAVFrame);
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in->pAVFrame->pts = in->frameCount;
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AVPacket pAVPacket = {0};
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av_init_packet(&pAVPacket);
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// encode the image
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int gotPacket = 0;
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int ret = avcodec_encode_video2(in->pAVCodecContext, &pAVPacket, in->pAVFrame, &gotPacket);
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if (ret < 0)
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{
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printf("avcodec_encode_video2 (1) error=%d\n", ret);
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return false;
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}
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if (gotPacket > 0)
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{
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printf("Succeed to encode (1) frame=%d, size=%d\n", in->pAVFrame->pts, pAVPacket.size);
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memcpy(in->buffer + in->buffSize, pAVPacket.data, pAVPacket.size);
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in->buffSize += pAVPacket.size;
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av_free_packet(&pAVPacket);
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}
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//#todo finit
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//Flush Encoder
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//while (gotPacket > 0)
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//{
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// ret = avcodec_encode_video2(in->pAVCodecContext, &pAVPacket, NULL, &gotPacket);
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// if (ret < 0)
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// {
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// printf("avcodec_encode_video2 (2) error=%d\n", ret);
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// return false;
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// }
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// if (gotPacket > 0)
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// {
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// printf("Succeed to encode (2) frame=%d, size=%d\n", in->pAVFrame->pts, pAVPacket.size);
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// memcpy(in->buffer + in->buffSize, pAVPacket.data, pAVPacket.size);
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// in->buffSize += pAVPacket.size;
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// av_free_packet(&pAVPacket);
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// }
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//}
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//#test
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if (in->buffSize > 0)
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{
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static FILE * pFile = fopen("out.h264","wba+");
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fwrite (in->buffer , sizeof(char), in->buffSize, pFile);
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fflush(pFile);
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}
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in->payError = (in->buffSize == 0);
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return !(in->payError);
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}
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bool PL_H264Encoder::pay(const PipeMaterial& pm)
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{
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H264Encoder_Internal* in = (H264Encoder_Internal*)internal;
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in->payError = true;
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if (!in->ffmpegInited)
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{
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bool ret = initH264EncoderEnv(in);
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if (!ret)
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{
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printf("initH264EncoderEnv error");
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return false;
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}
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else
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in->ffmpegInited = true;
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}
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bool ret = encodeH264(in, (AVFrame*)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_H264Encoder::gain(PipeMaterial& pm)
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{
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H264Encoder_Internal* in = (H264Encoder_Internal*)internal;
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if (!in->payError)
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{
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pm.buffer = in->buffer;
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pm.buffSize = 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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