ref: ccd31a5a2f3914de15ebcc12a2d2f4c7b6408874
dir: /tools/output/y4m2.c/
/* * Copyright © 2018, VideoLAN and dav1d authors * Copyright © 2018, Two Orioles, LLC * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions are met: * * 1. Redistributions of source code must retain the above copyright notice, this * list of conditions and the following disclaimer. * * 2. Redistributions in binary form must reproduce the above copyright notice, * this list of conditions and the following disclaimer in the documentation * and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #include "config.h" #include <errno.h> #include <stdio.h> #include <stdlib.h> #include <string.h> #include <sys/stat.h> #include "output/muxer.h" typedef struct MuxerPriv { FILE *f; } Y4m2OutputContext; static int y4m2_open(Y4m2OutputContext *const c, const char *const file, const Dav1dPictureParameters *p, const unsigned fps[2]) { if (!strcmp(file, "-")) { c->f = stdout; } else if (!(c->f = fopen(file, "wb"))) { fprintf(stderr, "Failed to open %s: %s\n", file, strerror(errno)); return -1; } static const char *const ss_names[][2] = { [DAV1D_PIXEL_LAYOUT_I400] = { "mono", "mono10" }, [DAV1D_PIXEL_LAYOUT_I420] = { NULL, "420p10" }, [DAV1D_PIXEL_LAYOUT_I422] = { "422", "422p10" }, [DAV1D_PIXEL_LAYOUT_I444] = { "444", "444p10" } }; static const char *const chr_names_8bpc_i420[] = { [DAV1D_CHR_UNKNOWN] = "420jpeg", [DAV1D_CHR_VERTICAL] = "420mpeg2", [DAV1D_CHR_COLOCATED] = "420paldv" }; const char *const ss_name = p->layout == DAV1D_PIXEL_LAYOUT_I420 && p->bpc == 8 ? chr_names_8bpc_i420[p->chr > 2 ? DAV1D_CHR_UNKNOWN : p->chr] : ss_names[p->layout][p->bpc > 8]; fprintf(c->f, "YUV4MPEG2 W%d H%d C%s Ip F%d:%d\n", p->w, p->h, ss_name, fps[0], fps[1]); return 0; } static int y4m2_write(Y4m2OutputContext *const c, Dav1dPicture *const p) { fprintf(c->f, "FRAME\n"); uint8_t *ptr; const int hbd = p->p.bpc > 8; ptr = p->data[0]; for (int y = 0; y < p->p.h; y++) { if (fwrite(ptr, p->p.w << hbd, 1, c->f) != 1) goto error; ptr += p->stride[0]; } if (p->p.layout != DAV1D_PIXEL_LAYOUT_I400) { // u/v const int ss_ver = p->p.layout == DAV1D_PIXEL_LAYOUT_I420; const int ss_hor = p->p.layout != DAV1D_PIXEL_LAYOUT_I444; const int cw = (p->p.w + ss_hor) >> ss_hor; const int ch = (p->p.h + ss_ver) >> ss_ver; for (int pl = 1; pl <= 2; pl++) { ptr = p->data[pl]; for (int y = 0; y < ch; y++) { if (fwrite(ptr, cw << hbd, 1, c->f) != 1) goto error; ptr += p->stride[1]; } } } dav1d_picture_unref(p); return 0; error: dav1d_picture_unref(p); fprintf(stderr, "Failed to write frame data: %s\n", strerror(errno)); return -1; } static void y4m2_close(Y4m2OutputContext *const c) { if (c->f != stdout) fclose(c->f); } const Muxer y4m2_muxer = { .priv_data_size = sizeof(Y4m2OutputContext), .name = "yuv4mpeg2", .extension = "y4m", .write_header = y4m2_open, .write_picture = y4m2_write, .write_trailer = y4m2_close, };