2020年5月27日16:01:28

source/OtherDemo/mydemo/FilterDemo/TestAvFilter.pro

@@ -21,12 +21,12 @@ contains(QT_ARCH, i386) {
 include($$PWD/../../lib/lib.pri)
 
 SOURCES += src/main.cpp \
-           src/audioMix.cpp \
-           src/crop.cpp
+           src/crop.cpp \
+           src/overlay.cpp
 
 HEADERS += \
-    src/audioMix.h \
-    src/crop.h
+    src/crop.h \
+    src/overlay.h
 
 
 

source/OtherDemo/mydemo/FilterDemo/src/audioMix.cpp

@@ -1,181 +0,0 @@
-/**
- * 叶海辉
- * QQ群121376426
- * http://blog.yundiantech.com/
- */
-
-#include "audioMix.h"
-
-//#ifdef _WIN32
-//    #ifndef snprintf
-//    #define snprintf _snprintf
-//    #endif
-//#endif
-
-#ifdef __cplusplus
-extern "C"
-{
-#endif
-    #include <libavcodec/avcodec.h>
-//    #include <libavfilter/avfiltergraph.h>
-    #include <libavfilter/buffersink.h>
-    #include <libavfilter/buffersrc.h>
-    #include <libavutil/avutil.h>
-    #include <libavutil/imgutils.h>
-#ifdef __cplusplus
-};
-#endif
-
-int doMixAudio()
-{
-    int ret;
-    AVFrame *frame_in;
-    AVFrame *frame_out;
-    unsigned char *frame_buffer_in;
-    unsigned char *frame_buffer_out;
-
-    AVFilterContext *buffersink_ctx;
-    AVFilterContext *buffersrc_ctx;
-    AVFilterGraph *filter_graph;
-
-    //Input YUV
-    FILE *fp_in=fopen("../data/in.yuv","rb+");
-    if(fp_in==NULL){
-        printf("Error open input file.\n");
-        return -1;
-    }
-    int in_width=176;
-    int in_height=144;
-
-    //Output YUV
-    FILE *fp_out=fopen("../data/output.yuv","wb+");
-    if(fp_out==NULL){
-        printf("Error open output file.\n");
-        return -1;
-    }
-
-    //const char *filter_descr = "lutyuv='u=128:v=128'";
-    //const char *filter_descr = "boxblur";
-    //const char *filter_descr = "hflip";
-    //const char *filter_descr = "hue='h=60:s=-3'";
-//    const char *filter_descr = "crop=2/3*in_w:2/3*in_h";
-    const char *filter_descr = "crop=out_w=100:out_h=100:x=10:y=10";
-//    const char *filter_descr = "drawbox=x=100:y=100:w=100:h=100:color=pink@0.5";
-    //const char *filter_descr = "drawtext=fontfile=arial.ttf:fontcolor=green:fontsize=30:text='Lei Xiaohua'";
-
-    avfilter_register_all();
-
-    char args[512];
-    const AVFilter *buffersrc  = avfilter_get_by_name("buffer");
-//    const AVFilter *buffersink = avfilter_get_by_name("ffbuffersink");新版的ffmpeg这里要改成buffersink
-    const AVFilter *buffersink = avfilter_get_by_name("buffersink");
-    AVFilterInOut *outputs = avfilter_inout_alloc();
-    AVFilterInOut *inputs  = avfilter_inout_alloc();
-    AVPixelFormat pix_fmts[] = { AV_PIX_FMT_YUV420P, AV_PIX_FMT_NONE };
-    AVBufferSinkParams *buffersink_params;
-
-    filter_graph = avfilter_graph_alloc();
-
-    /* buffer video source: the decoded frames from the decoder will be inserted here. */
-    snprintf(args, sizeof(args),
-        "video_size=%dx%d:pix_fmt=%d:time_base=%d/%d:pixel_aspect=%d/%d",
-        in_width,in_height,AV_PIX_FMT_YUV420P,
-        1, 25,1,1);
-
-    ret = avfilter_graph_create_filter(&buffersrc_ctx, buffersrc, "in",
-        args, NULL, filter_graph);
-    if (ret < 0) {
-        printf("Cannot create buffer source\n");
-        return ret;
-    }
-
-    /* buffer video sink: to terminate the filter chain. */
-    buffersink_params = av_buffersink_params_alloc();
-    buffersink_params->pixel_fmts = pix_fmts;
-    ret = avfilter_graph_create_filter(&buffersink_ctx, buffersink, "out",
-        NULL, buffersink_params, filter_graph);
-    av_free(buffersink_params);
-    if (ret < 0) {
-        char str[AV_ERROR_MAX_STRING_SIZE] = {0};
-        av_make_error_string(str, AV_ERROR_MAX_STRING_SIZE, ret);
-        printf("Cannot create buffer sink %d %s\n", ret, str);
-        return ret;
-    }
-
-    /* Endpoints for the filter graph. */
-    outputs->name       = av_strdup("in");
-    outputs->filter_ctx = buffersrc_ctx;
-    outputs->pad_idx    = 0;
-    outputs->next       = NULL;
-
-    inputs->name       = av_strdup("out");
-    inputs->filter_ctx = buffersink_ctx;
-    inputs->pad_idx    = 0;
-    inputs->next       = NULL;
-
-    if ((ret = avfilter_graph_parse_ptr(filter_graph, filter_descr,
-        &inputs, &outputs, NULL)) < 0)
-        return ret;
-
-    if ((ret = avfilter_graph_config(filter_graph, NULL)) < 0)
-        return ret;
-
-    frame_in=av_frame_alloc();
-    frame_buffer_in=(unsigned char *)av_malloc(av_image_get_buffer_size(AV_PIX_FMT_YUV420P, in_width,in_height,1));
-    av_image_fill_arrays(frame_in->data, frame_in->linesize,frame_buffer_in,
-        AV_PIX_FMT_YUV420P,in_width, in_height,1);
-
-    frame_out=av_frame_alloc();
-    frame_buffer_out=(unsigned char *)av_malloc(av_image_get_buffer_size(AV_PIX_FMT_YUV420P, in_width,in_height,1));
-    av_image_fill_arrays(frame_out->data, frame_out->linesize,frame_buffer_out,
-        AV_PIX_FMT_YUV420P,in_width, in_height,1);
-
-    frame_in->width=in_width;
-    frame_in->height=in_height;
-    frame_in->format=AV_PIX_FMT_YUV420P;
-
-    while (1) {
-
-        if(fread(frame_buffer_in, 1, in_width*in_height*3/2, fp_in)!= in_width*in_height*3/2){
-            break;
-        }
-        //input Y,U,V
-        frame_in->data[0]=frame_buffer_in;
-        frame_in->data[1]=frame_buffer_in+in_width*in_height;
-        frame_in->data[2]=frame_buffer_in+in_width*in_height*5/4;
-
-        if (av_buffersrc_add_frame(buffersrc_ctx, frame_in) < 0) {
-            printf( "Error while add frame.\n");
-            break;
-        }
-
-        /* pull filtered pictures from the filtergraph */
-        ret = av_buffersink_get_frame(buffersink_ctx, frame_out);
-        if (ret < 0)
-            break;
-
-        //output Y,U,V
-        if(frame_out->format==AV_PIX_FMT_YUV420P){
-            for(int i=0;i<frame_out->height;i++){
-                fwrite(frame_out->data[0]+frame_out->linesize[0]*i,1,frame_out->width,fp_out);
-            }
-            for(int i=0;i<frame_out->height/2;i++){
-                fwrite(frame_out->data[1]+frame_out->linesize[1]*i,1,frame_out->width/2,fp_out);
-            }
-            for(int i=0;i<frame_out->height/2;i++){
-                fwrite(frame_out->data[2]+frame_out->linesize[2]*i,1,frame_out->width/2,fp_out);
-            }
-        }
-        printf("Process 1 frame!\n");
-        av_frame_unref(frame_out);
-    }
-
-    fclose(fp_in);
-    fclose(fp_out);
-
-    av_frame_free(&frame_in);
-    av_frame_free(&frame_out);
-    avfilter_graph_free(&filter_graph);
-
-    return 0;
-}

source/OtherDemo/mydemo/FilterDemo/src/audioMix.h

@@ -1,16 +0,0 @@
-/**
- * 叶海辉
- * QQ群121376426
- * http://blog.yundiantech.com/
- */
-
-#pragma once
-
-/***
- * 混音例子
- *
- * @brief doCrop
- * @return
- */
-int doMixAudio();
-

source/OtherDemo/mydemo/FilterDemo/src/main.cpp

@@ -7,10 +7,15 @@
 #include <stdio.h>
 
 #include "crop.h"
+#include "overlay.h"
 
 int main(int argc, char* argv[])
 {
+    ///1.YUV图像裁剪例子-这个OK了。
     doCrop();
 
+    ///2.YUV图像叠加，不会用，有问题。
+//    doOverlay();
+
     return 0;
 }