ref: f74e0229d5575af20498a9dbf48f1d305dfc8719
dir: libvpx/y4menc.c
/*
* Copyright (c) 2014 The WebM project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#include <assert.h>
#include "./y4menc.h"
int y4m_write_file_header(char *buf, size_t len, int width, int height,
const struct VpxRational *framerate,
vpx_img_fmt_t fmt, unsigned int bit_depth) {
const char *color;
switch (bit_depth) {
case 8:
color = fmt == VPX_IMG_FMT_I444
? "C444\n"
: fmt == VPX_IMG_FMT_I422 ? "C422\n" : "C420jpeg\n";
break;
case 9:
color = fmt == VPX_IMG_FMT_I44416
? "C444p9 XYSCSS=444P9\n"
: fmt == VPX_IMG_FMT_I42216 ? "C422p9 XYSCSS=422P9\n"
: "C420p9 XYSCSS=420P9\n";
break;
case 10:
color = fmt == VPX_IMG_FMT_I44416
? "C444p10 XYSCSS=444P10\n"
: fmt == VPX_IMG_FMT_I42216 ? "C422p10 XYSCSS=422P10\n"
: "C420p10 XYSCSS=420P10\n";
break;
case 12:
color = fmt == VPX_IMG_FMT_I44416
? "C444p12 XYSCSS=444P12\n"
: fmt == VPX_IMG_FMT_I42216 ? "C422p12 XYSCSS=422P12\n"
: "C420p12 XYSCSS=420P12\n";
break;
case 14:
color = fmt == VPX_IMG_FMT_I44416
? "C444p14 XYSCSS=444P14\n"
: fmt == VPX_IMG_FMT_I42216 ? "C422p14 XYSCSS=422P14\n"
: "C420p14 XYSCSS=420P14\n";
break;
case 16:
color = fmt == VPX_IMG_FMT_I44416
? "C444p16 XYSCSS=444P16\n"
: fmt == VPX_IMG_FMT_I42216 ? "C422p16 XYSCSS=422P16\n"
: "C420p16 XYSCSS=420P16\n";
break;
default: color = NULL; assert(0);
}
return snprintf(buf, len, "YUV4MPEG2 W%u H%u F%u:%u I%c %s", width, height,
framerate->numerator, framerate->denominator, 'p', color);
}
int y4m_write_frame_header(char *buf, size_t len) {
return snprintf(buf, len, "FRAME\n");
}