1 /*
2 * Copyright (c) 2014 The WebM project authors. All Rights Reserved.
3 *
4 * Use of this source code is governed by a BSD-style license
5 * that can be found in the LICENSE file in the root of the source
6 * tree. An additional intellectual property rights grant can be found
7 * in the file PATENTS. All contributing project authors may
8 * be found in the AUTHORS file in the root of the source tree.
9 */
10
11 #include <assert.h>
12 #include "./y4menc.h"
13
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)14 int y4m_write_file_header(char *buf, size_t len, int width, int height,
15 const struct VpxRational *framerate,
16 vpx_img_fmt_t fmt, unsigned int bit_depth) {
17 const char *color;
18 switch (bit_depth) {
19 case 8:
20 color = fmt == VPX_IMG_FMT_I444 ? "C444\n"
21 : fmt == VPX_IMG_FMT_I422 ? "C422\n"
22 : "C420jpeg\n";
23 break;
24 case 9:
25 color = fmt == VPX_IMG_FMT_I44416 ? "C444p9 XYSCSS=444P9\n"
26 : fmt == VPX_IMG_FMT_I42216 ? "C422p9 XYSCSS=422P9\n"
27 : "C420p9 XYSCSS=420P9\n";
28 break;
29 case 10:
30 color = fmt == VPX_IMG_FMT_I44416 ? "C444p10 XYSCSS=444P10\n"
31 : fmt == VPX_IMG_FMT_I42216 ? "C422p10 XYSCSS=422P10\n"
32 : "C420p10 XYSCSS=420P10\n";
33 break;
34 case 12:
35 color = fmt == VPX_IMG_FMT_I44416 ? "C444p12 XYSCSS=444P12\n"
36 : fmt == VPX_IMG_FMT_I42216 ? "C422p12 XYSCSS=422P12\n"
37 : "C420p12 XYSCSS=420P12\n";
38 break;
39 case 14:
40 color = fmt == VPX_IMG_FMT_I44416 ? "C444p14 XYSCSS=444P14\n"
41 : fmt == VPX_IMG_FMT_I42216 ? "C422p14 XYSCSS=422P14\n"
42 : "C420p14 XYSCSS=420P14\n";
43 break;
44 case 16:
45 color = fmt == VPX_IMG_FMT_I44416 ? "C444p16 XYSCSS=444P16\n"
46 : fmt == VPX_IMG_FMT_I42216 ? "C422p16 XYSCSS=422P16\n"
47 : "C420p16 XYSCSS=420P16\n";
48 break;
49 default: color = NULL; assert(0);
50 }
51 return snprintf(buf, len, "YUV4MPEG2 W%u H%u F%u:%u I%c %s", width, height,
52 framerate->numerator, framerate->denominator, 'p', color);
53 }
54
y4m_write_frame_header(char * buf,size_t len)55 int y4m_write_frame_header(char *buf, size_t len) {
56 return snprintf(buf, len, "FRAME\n");
57 }
58