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1 | /***************************************************************************** |
2 | * Copyright (C) 2013 x265 project | |
3 | * | |
4 | * Authors: Steve Borho <steve@borho.org> | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program; if not, write to the Free Software | |
18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02111, USA. | |
19 | * | |
20 | * This program is also available under a commercial proprietary license. | |
21 | * For more information, contact us at license @ x265.com. | |
22 | *****************************************************************************/ | |
23 | ||
24 | #include "common.h" | |
25 | #include "output.h" | |
26 | #include "y4m.h" | |
27 | ||
28 | using namespace x265; | |
29 | using namespace std; | |
30 | ||
31 | Y4MOutput::Y4MOutput(const char *filename, int w, int h, uint32_t fpsNum, uint32_t fpsDenom, int csp) | |
32 | : width(w) | |
33 | , height(h) | |
34 | , colorSpace(csp) | |
35 | , frameSize(0) | |
36 | { | |
37 | ofs.open(filename, ios::binary | ios::out); | |
38 | buf = new char[width]; | |
39 | ||
40 | const char *cf = (csp >= X265_CSP_I444) ? "444" : (csp >= X265_CSP_I422) ? "422" : "420"; | |
41 | ||
42 | if (ofs) | |
43 | { | |
44 | ofs << "YUV4MPEG2 W" << width << " H" << height << " F" << fpsNum << ":" << fpsDenom << " Ip" << " C" << cf << "\n"; | |
45 | header = ofs.tellp(); | |
46 | } | |
47 | ||
48 | for (int i = 0; i < x265_cli_csps[colorSpace].planes; i++) | |
49 | { | |
50 | frameSize += (uint32_t)((width >> x265_cli_csps[colorSpace].width[i]) * (height >> x265_cli_csps[colorSpace].height[i])); | |
51 | } | |
52 | } | |
53 | ||
54 | Y4MOutput::~Y4MOutput() | |
55 | { | |
56 | ofs.close(); | |
57 | delete [] buf; | |
58 | } | |
59 | ||
60 | bool Y4MOutput::writePicture(const x265_picture& pic) | |
61 | { | |
62 | std::ofstream::pos_type outPicPos = header; | |
63 | outPicPos += (uint64_t)pic.poc * (6 + frameSize); | |
64 | ofs.seekp(outPicPos); | |
65 | ofs << "FRAME\n"; | |
66 | ||
67 | #if HIGH_BIT_DEPTH | |
68 | if (pic.bitDepth > 8 && pic.poc == 0) | |
69 | { | |
70 | x265_log(NULL, X265_LOG_WARNING, "y4m: down-shifting reconstructed pixels to 8 bits\n"); | |
71 | } | |
72 | #else | |
73 | if (pic.bitDepth > 8 && pic.poc == 0) | |
74 | { | |
75 | x265_log(NULL, X265_LOG_WARNING, "y4m: forcing reconstructed pixels to 8 bits\n"); | |
76 | } | |
77 | #endif | |
78 | ||
79 | X265_CHECK(pic.colorSpace == colorSpace, "invalid color space\n"); | |
80 | ||
81 | #if HIGH_BIT_DEPTH | |
82 | ||
83 | // encoder gave us short pixels, downshift, then write | |
84 | X265_CHECK(pic.bitDepth > 8, "invalid bit depth\n"); | |
85 | int shift = pic.bitDepth - 8; | |
86 | for (int i = 0; i < x265_cli_csps[colorSpace].planes; i++) | |
87 | { | |
88 | uint16_t *src = (uint16_t*)pic.planes[i]; | |
89 | for (int h = 0; h < height >> x265_cli_csps[colorSpace].height[i]; h++) | |
90 | { | |
91 | for (int w = 0; w < width >> x265_cli_csps[colorSpace].width[i]; w++) | |
92 | { | |
93 | buf[w] = (char)(src[w] >> shift); | |
94 | } | |
95 | ||
96 | ofs.write(buf, width >> x265_cli_csps[colorSpace].width[i]); | |
97 | src += pic.stride[i] / sizeof(*src); | |
98 | } | |
99 | } | |
100 | ||
101 | #else // if HIGH_BIT_DEPTH | |
102 | ||
103 | X265_CHECK(pic.bitDepth == 8, "invalid bit depth\n"); | |
104 | for (int i = 0; i < x265_cli_csps[colorSpace].planes; i++) | |
105 | { | |
106 | char *src = (char*)pic.planes[i]; | |
107 | for (int h = 0; h < height >> x265_cli_csps[colorSpace].height[i]; h++) | |
108 | { | |
109 | ofs.write(src, width >> x265_cli_csps[colorSpace].width[i]); | |
110 | src += pic.stride[i] / sizeof(*src); | |
111 | } | |
112 | } | |
113 | ||
114 | #endif // if HIGH_BIT_DEPTH | |
115 | ||
116 | return true; | |
117 | } |