hvirtual/quicktime/yuv4toyuv.c

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#include "quicktime.h"

int usage(void)
{
        printf("usage: yuv4toyuv <input movie> <output.yuv>\n");
        printf("        Write a YUV4 encoded movie as a planar YUV 4:2:0 file.\n");
        exit(1);
}

int main(int argc, char *argv[])
{
        quicktime_t *file;
        FILE *output;
        int64_t length, width, height, bytes;
        char *buffer_in, *y_out, *u_out, *v_out;
        char *y_out1, *y_out2, *u_out1, *v_out1;
        char *input_row;
        int i, j, k, l, m;

        if(argc < 3)
        {
                usage();
        }

        if(!(file = quicktime_open(argv[1], 1, 0)))
        {
                printf("Open input failed\n");
                exit(1);
        }

        if(!(output = fopen(argv[2], "wb")))
        {
                perror("Open output failed");
                exit(1);
        }

        if(!quicktime_video_tracks(file))
        {
                printf("No video tracks.\n");
                exit(1);
        }

        length = quicktime_video_length(file, 0);
        width = quicktime_video_width(file, 0);
        height = quicktime_video_height(file, 0);
        bytes = width * height + width * height / 2;
        buffer_in = calloc(1, bytes);
        y_out = calloc(1, width * height);
        u_out = calloc(1, width * height / 4);
        v_out = calloc(1, width * height / 4);

        for(i = 0; i < length; i++)
        {
                quicktime_set_video_position(file, i, 0);
                quicktime_read_data(file, buffer_in, bytes);

                u_out1 = u_out;
                v_out1 = v_out;
                for(j = 0; j < height; j += 2)
                {
// Get 2 rows
                        input_row = &buffer_in[j * width  + j * width / 2];
                        y_out1 = y_out + j * width;
                        y_out2 = y_out1 + width;

                        for(k = 0; k < width / 2; k++)
                        {
                                *u_out1++ = (int)*input_row++ + 0x80;
                                *v_out1++ = (int)*input_row++ + 0x80;
                                *y_out1++ = *input_row++;
                                *y_out1++ = *input_row++;
                                *y_out2++ = *input_row++;
                                *y_out2++ = *input_row++;
                        }
                }

                if(!fwrite(y_out, width * height, 1, output))
                {
                        perror("write failed");
                        fclose(output);
                        exit(1);
                }
                if(!fwrite(u_out, width * height / 4, 1, output))
                {
                        perror("write failed");
                        fclose(output);
                        exit(1);
                }
                if(!fwrite(v_out, width * height / 4, 1, output))
                {
                        perror("write failed");
                        fclose(output);
                        exit(1);
                }
        }

        quicktime_close(file);
}

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