From 828e4b0981b546431ce1fe9f61d1883a84b07894 Mon Sep 17 00:00:00 2001 From: hanruobing Date: Fri, 16 Aug 2019 11:15:55 +0800 Subject: [PATCH] add some annotation --- bin/testGo.jpeg | Bin 0 -> 19199 bytes convert.go | 120 +++++++++++++------------------- {src => resource}/h265.mp4 | Bin {src => resource}/test.h265 | Bin {src => resource}/testvack.h265 | Bin 5 files changed, 49 insertions(+), 71 deletions(-) create mode 100644 bin/testGo.jpeg rename {src => resource}/h265.mp4 (100%) rename {src => resource}/test.h265 (100%) rename {src => resource}/testvack.h265 (100%) diff --git a/bin/testGo.jpeg b/bin/testGo.jpeg new file mode 100644 index 0000000000000000000000000000000000000000..7a02ec951ee3041310cd008e891b6473db56e44b GIT binary patch literal 19199 zcmYg%WmFVi^zDG6gd*J`NOyNA4Z{pwLrDokcZaCNkP^cv2uKXwIW*ECAT10bLw63+ zzTf|?_2PWE>)vzMUgyiXAI{$U{`>v!0YIW{<8LP}B_J*)AS@&V_=g541Muse*fd3nh9^>NSJOMn#0sK$?|GNO-;68ec_k;w1i-Y_45gy)?$4~w@6c>l|5rB+E 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zs5;dS!u>DkwRS3Lt962;^$ z+8=Ok9;BC}o9_$VZ*NjC@ykrdg|MhFX?_>wmCN_KQ`D%!JDeDQ*D9CdC*(h^lz;0a z$)`|*%u~MKxT=o~@%#L)L9{xEj#^4|Sh#eXU)z`FUn2ZIJ(ZkK{{Zt5@opMjP)+Lp z0IgG>_lTDyD*Fn7xdw?f$Ks}zO41Xz3`PakjABPXh{{UU553v@FXTGILR65|th5>%j8M=iz<4E7C`Q>eMN=x~C zztHla3T_U7h=|rg2gJ_4FIecy*!nERq%k}x$d%t#}&ZxG( S3#C+FYPFmGUm-a6AOG2o)H0L+ literal 0 HcmV?d00001 diff --git a/convert.go b/convert.go index 31d7e3a..d5a5636 100644 --- a/convert.go +++ b/convert.go @@ -1,7 +1,7 @@ package main /* - +//user you own clib path and *.h path #cgo CFLAGS: -I/usr/local/ffmpeg/include #cgo LDFLAGS:-L/usr/local/ffmpeg/lib -lavcodec -lavformat -lavfilter -lavutil -lavdevice -lswresample @@ -26,20 +26,11 @@ struct Output int offset; }; -//函数声明 +//func declear int saveJpg(AVFrame *pFrame, struct Output *output_data); //缓存1Mb const int BUF_SIZE = 1048576; -// const 32KB = 32768; -// char h265_data; //传入的h265文件 -// // char *h265_data; -// int read_true_size = 0; //h265文件实际大小 -// int read_offset = 0; //读取的偏移 - -// int write_offset = 0; -// uint8_t jpeg_data[1048576] = {"\0"}; -// uint8_t *jpeg_data = NULL; //读取数据的回调函数------------------------- //AVIOContext使用的回调函数！ @@ -47,10 +38,14 @@ const int BUF_SIZE = 1048576; //手动初始化AVIOContext只需要两个东西：内容来源的buffer，和读取这个Buffer到FFmpeg中的函数 //回调函数，功能就是：把buf_size字节数据送入buf即可 //第一个参数(void *opaque)一般情况下可以不用 + +//call back fun for AVIOContext +//retuen the size of data in real +//send buf_size data to buf int fill_iobuffer(void *opaque, uint8_t *buf, int buf_size) { //从h256_data拷贝到buf中buf_size个字节 - + //copy buf_size data to buf from h265_data struct Input *data = (struct Input *)opaque; // int read_offset = data->offset; int size = data->size; @@ -58,7 +53,7 @@ int fill_iobuffer(void *opaque, uint8_t *buf, int buf_size) if (data->offset + buf_size - 1 < size) { - //读取未溢出 直接复制 + //has enough data memcpy(buf, h265_data + data->offset, buf_size); data->offset += buf_size; // printf("callback: read offset: %d\n", read_offset); @@ -66,18 +61,17 @@ int fill_iobuffer(void *opaque, uint8_t *buf, int buf_size) } else { - //已经溢出无法读取 + //no data to read if (data->offset >= size) { return -1; } else { - //还有剩余字节未读取但不到buf_size 读取剩余字节 int real_read = size - data->offset; memcpy(buf, h265_data + data->offset, real_read); data->offset += buf_size; - printf("callback: read offset: %d\n", data->offset); + // printf("callback: read offset: %d\n", data->offset); return real_read; } } @@ -94,11 +88,10 @@ int convert(struct Input *input_data, struct Output *output_data) AVFrame *frame; // 帧 AVPacket avpkt; // 数据包 - //打开文件描述符 - // fp_open = fopen(inputFile, "rb+"); fmtCtx = avformat_alloc_context(); unsigned char *iobuffer = (unsigned char *)av_malloc(BUF_SIZE); - //初始化AVIOContext fill_iobuffer为自定的回调函数 + + //init AVIOContext fill_iobuffer is a callback func AVIOContext *avio = avio_alloc_context(iobuffer, BUF_SIZE, 0, input_data, fill_iobuffer, NULL, NULL); fmtCtx->pb = avio; @@ -108,14 +101,14 @@ int convert(struct Input *input_data, struct Output *output_data) exit(0); } - if (avformat_find_stream_info(fmtCtx, NULL) < 0) // 失败返回负值 + if (avformat_find_stream_info(fmtCtx, NULL) < 0) { printf("Error in find stream"); exit(0); } - //av_dump_format(fmt_ctx, 0, inputFile, 0); // 打印控制信息 - av_init_packet(&avpkt); // 初始化数据包 + //av_dump_format(fmt_ctx, 0, inputFile, 0); + av_init_packet(&avpkt); avpkt.data = NULL; avpkt.size = 0; @@ -126,10 +119,11 @@ int convert(struct Input *input_data, struct Output *output_data) exit(0); } - originPar = fmtCtx->streams[streamType]->codecpar; // 获取流对应的解码器参数 - codec = avcodec_find_decoder(originPar->codec_id); // 根据解码器参数获取解码器 + //auto find right encoder + originPar = fmtCtx->streams[streamType]->codecpar; + codec = avcodec_find_decoder(originPar->codec_id); if (!codec) - { // 未找到返回NULL + { printf("Error in get the codec"); exit(0); } @@ -141,7 +135,7 @@ int convert(struct Input *input_data, struct Output *output_data) exit(0); } - if (avcodec_parameters_to_context(codeCtx, originPar) < 0) // 替换解码器上下文参数 + if (avcodec_parameters_to_context(codeCtx, originPar) < 0) { printf("Error in replace the parameters int the codeCtx"); exit(0); @@ -171,10 +165,11 @@ int convert(struct Input *input_data, struct Output *output_data) } } + //free av_packt av_packet_unref(&avpkt); } -//写文件的回调函数 +//your own callback func, to deal with converted data int write_buffer(void *opaque, uint8_t *buf, int buf_size) { struct Output *data = (struct Output *)opaque; @@ -195,28 +190,19 @@ int saveJpg(AVFrame *pFrame, struct Output *output_data) int height = pFrame->height; AVCodecContext *pCodeCtx = NULL; - //打开输出文件 - // fp_write = fopen(out_name, "wb+"); AVFormatContext *pFormatCtx = NULL; avformat_alloc_output_context2(&pFormatCtx, NULL, "mjpeg", NULL); - // AVFormatContext *pFormatCtx = avformat_alloc_context(); - // 设置输出文件格式 - // pFormatCtx->oformat = av_guess_format("mjpeg", NULL, NULL); + //new a AVIOContext and contact with pFormatCtx + //you need give AVIOContext your own call back func, to tell AVIOContext how to write the converted data unsigned char *outbuffer = (unsigned char *)av_malloc(BUF_SIZE); - //新建一个AVIOContext 并与pFormatCtx关联 AVIOContext *avio_out = avio_alloc_context(outbuffer, BUF_SIZE, 1, output_data, NULL, write_buffer, NULL); + //contact with pFormatCtx pFormatCtx->pb = avio_out; pFormatCtx->flags = AVFMT_FLAG_CUSTOM_IO | AVFMT_FLAG_FLUSH_PACKETS; - // //创建并初始化输出AVIOContext - // if (avio_open(&pFormatCtx->pb, "./bin/nothing.jpeg", AVIO_FLAG_READ_WRITE) < 0) - // { - // printf("Couldn't open output file.\n"); - // return -1; - // } - // 构建一个新stream + // new stream AVStream *pAVStream = avformat_new_stream(pFormatCtx, 0); if (pAVStream == NULL) { @@ -269,11 +255,11 @@ int saveJpg(AVFrame *pFrame, struct Output *output_data) int y_size = width * height; //Encode - // 给AVPacket分配足够大的空间 + //give AVPacket enough space AVPacket pkt; av_new_packet(&pkt, y_size * 3); - // 编码数据 + // send frame ret = avcodec_send_frame(pCodeCtx, pFrame); if (ret < 0) { @@ -281,7 +267,7 @@ int saveJpg(AVFrame *pFrame, struct Output *output_data) return -1; } - // 得到编码后数据 + // recv packt ret = avcodec_receive_packet(pCodeCtx, &pkt); if (ret < 0) { @@ -373,54 +359,46 @@ func c_h265_to_jpeg(src []byte, size int) (des []byte, err error) { res := C.h265_to_jpeg(c_src, c_des, *c_int) // fmt.Println(res) if res < 0 { - err = errors.New("C encode err!") + err = errors.New("C convert err!") return } des = des[:res] return } -var times = 10 - -//BenchmarkFFMpegC test -func BenchmarkFFMpegC(src []byte) { - - var des []byte - for i := 0; i < times; i++ { - func() { - des, _ = c_h265_to_jpeg(src, len(src)) - }() +func startConvert(src []byte) { + des, err := c_h265_to_jpeg(src, len(src)) + if err != nil { + return } - + //write files WriteWithIoutil("./bin/testGo.jpeg", des) } func main() { - var now, end time.Time - // go func() { - // log.Println(http.ListenAndServe("localhost:10000", nil)) - // }() - //读取文件 - inputFile := "/work/dana_work/gopath/src/github.com/lucish/convert-video/src/huangxiao.h265" + //read resource + inputFile := "resource/test.h265" src, err := ReadAll(inputFile) if err != nil || len(src) == 0 { fmt.Println(err.Error()) fmt.Println("read file err") return } - fmt.Println("read file len: ", len(src)) + // fmt.Println("read file len: ", len(src)) - fmt.Println("开始执行转码") - now = time.Now() - BenchmarkFFMpegC(src) - end = time.Now() + fmt.Println("start convert") - fmt.Printf("FFMpegC loop %d times, the cost time is %d\n", times, end.Sub(now)) + start := time.Now().UnixNano() + startConvert(src) + end := time.Now().UnixNano() + + fmt.Printf("cost time is %d ms\n", (end-start)/1e6) // select {} } +//read file func ReadAll(filePth string) ([]byte, error) { f, err := os.Open(filePth) defer f.Close() @@ -430,10 +408,10 @@ func ReadAll(filePth string) ([]byte, error) { return ioutil.ReadAll(f) } -//使用ioutil.WriteFile方式写入文件,是将[]byte内容写入文件,如果content字符串中没有换行符的话，默认就不会有换行符 -func WriteWithIoutil(name string, content []byte) error { - if err := ioutil.WriteFile(name, content, 0644); err == nil { - fmt.Println("写入文件成功") +//weite file +func WriteWithIoutil(filePath string, content []byte) error { + if err := ioutil.WriteFile(filePath, content, 0644); err == nil { + fmt.Println("write file success") } else { fmt.Println(err.Error()) } diff --git a/src/h265.mp4 b/resource/h265.mp4 similarity index 100% rename from src/h265.mp4 rename to resource/h265.mp4 diff --git a/src/test.h265 b/resource/test.h265 similarity index 100% rename from src/test.h265 rename to resource/test.h265 diff --git a/src/testvack.h265 b/resource/testvack.h265 similarity index 100% rename from src/testvack.h265 rename to resource/testvack.h265