1 /*
2 * Copyright (c) 2016, Alliance for Open Media. All rights reserved.
3 *
4 * This source code is subject to the terms of the BSD 2 Clause License and
5 * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
6 * was not distributed with this source code in the LICENSE file, you can
7 * obtain it at www.aomedia.org/license/software. If the Alliance for Open
8 * Media Patent License 1.0 was not distributed with this source code in the
9 * PATENTS file, you can obtain it at www.aomedia.org/license/patent.
10 */
11
12 #include <assert.h>
13
14 #include "common/rawenc.h"
15 #include "common/y4menc.h"
16
17 // Returns the Y4M name associated with the monochrome colorspace.
monochrome_colorspace(unsigned int bit_depth)18 static const char *monochrome_colorspace(unsigned int bit_depth) {
19 switch (bit_depth) {
20 case 8: return "Cmono";
21 case 9: return "Cmono9";
22 case 10: return "Cmono10";
23 case 12: return "Cmono12";
24 case 16: return "Cmono16";
25 default: assert(0); return NULL;
26 }
27 }
28
29 // Return the Y4M name of the 8-bit colorspace, given the chroma position and
30 // image format.
colorspace8(aom_chroma_sample_position_t csp,aom_img_fmt_t fmt)31 static const char *colorspace8(aom_chroma_sample_position_t csp,
32 aom_img_fmt_t fmt) {
33 switch (fmt) {
34 case AOM_IMG_FMT_I444: return "C444";
35 case AOM_IMG_FMT_I422: return "C422";
36 default:
37 if (csp == AOM_CSP_VERTICAL) {
38 return "C420mpeg2 XYSCSS=420MPEG2";
39 } else if (csp == AOM_CSP_COLOCATED) {
40 // Note that Y4M does not have a dedicated header for colocated chroma,
41 // and that FFMPEG interprets C420 as C420jpeg.
42 return "C420";
43 } else {
44 return "C420jpeg";
45 }
46 }
47 }
48
49 // Return the Y4M name of the colorspace, given the bit depth and image format.
colorspace(unsigned int bit_depth,aom_chroma_sample_position_t csp,aom_img_fmt_t fmt)50 static const char *colorspace(unsigned int bit_depth,
51 aom_chroma_sample_position_t csp,
52 aom_img_fmt_t fmt) {
53 switch (bit_depth) {
54 case 8: return colorspace8(csp, fmt);
55 case 9:
56 return fmt == AOM_IMG_FMT_I44416 ? "C444p9 XYSCSS=444P9"
57 : fmt == AOM_IMG_FMT_I42216 ? "C422p9 XYSCSS=422P9"
58 : "C420p9 XYSCSS=420P9";
59 case 10:
60 return fmt == AOM_IMG_FMT_I44416 ? "C444p10 XYSCSS=444P10"
61 : fmt == AOM_IMG_FMT_I42216 ? "C422p10 XYSCSS=422P10"
62 : "C420p10 XYSCSS=420P10";
63 case 12:
64 return fmt == AOM_IMG_FMT_I44416 ? "C444p12 XYSCSS=444P12"
65 : fmt == AOM_IMG_FMT_I42216 ? "C422p12 XYSCSS=422P12"
66 : "C420p12 XYSCSS=420P12";
67 case 14:
68 return fmt == AOM_IMG_FMT_I44416 ? "C444p14 XYSCSS=444P14"
69 : fmt == AOM_IMG_FMT_I42216 ? "C422p14 XYSCSS=422P14"
70 : "C420p14 XYSCSS=420P14";
71 case 16:
72 return fmt == AOM_IMG_FMT_I44416 ? "C444p16 XYSCSS=444P16"
73 : fmt == AOM_IMG_FMT_I42216 ? "C422p16 XYSCSS=422P16"
74 : "C420p16 XYSCSS=420P16";
75 default: assert(0); return NULL;
76 }
77 }
78
y4m_write_file_header(char * buf,size_t len,int width,int height,const struct AvxRational * framerate,int monochrome,aom_chroma_sample_position_t csp,aom_img_fmt_t fmt,unsigned int bit_depth,aom_color_range_t range)79 int y4m_write_file_header(char *buf, size_t len, int width, int height,
80 const struct AvxRational *framerate, int monochrome,
81 aom_chroma_sample_position_t csp, aom_img_fmt_t fmt,
82 unsigned int bit_depth, aom_color_range_t range) {
83 const char *color = monochrome ? monochrome_colorspace(bit_depth)
84 : colorspace(bit_depth, csp, fmt);
85 const char *color_range = ""; // Default assumption is studio range.
86 if (range == AOM_CR_FULL_RANGE) {
87 color_range = " XCOLORRANGE=FULL";
88 }
89 return snprintf(buf, len, "YUV4MPEG2 W%d H%d F%d:%d Ip %s%s\n", width, height,
90 framerate->numerator, framerate->denominator, color,
91 color_range);
92 }
93
y4m_write_frame_header(char * buf,size_t len)94 int y4m_write_frame_header(char *buf, size_t len) {
95 return snprintf(buf, len, "FRAME\n");
96 }
97
y4m_write_image_file(const aom_image_t * img,const int * planes,FILE * file)98 void y4m_write_image_file(const aom_image_t *img, const int *planes,
99 FILE *file) {
100 int num_planes = img->monochrome ? 1 : 3;
101 raw_write_image_file(img, planes, num_planes, file);
102 }
103
y4m_update_image_md5(const aom_image_t * img,const int * planes,MD5Context * md5)104 void y4m_update_image_md5(const aom_image_t *img, const int *planes,
105 MD5Context *md5) {
106 int num_planes = img->monochrome ? 1 : 3;
107 raw_update_image_md5(img, planes, num_planes, md5);
108 }
109