1 /*****************************************************************************
2 * raw.c: raw input
3 *****************************************************************************
4 * Copyright (C) 2003-2021 x264 project
5 *
6 * Authors: Laurent Aimar <fenrir@via.ecp.fr>
7 * Loren Merritt <lorenm@u.washington.edu>
8 * Steven Walters <kemuri9@gmail.com>
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
14 *
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02111, USA.
23 *
24 * This program is also available under a commercial proprietary license.
25 * For more information, contact us at licensing@x264.com.
26 *****************************************************************************/
27
28 #include "input.h"
29
30 #define FAIL_IF_ERROR( cond, ... ) FAIL_IF_ERR( cond, "raw", __VA_ARGS__ )
31
32 typedef struct
33 {
34 FILE *fh;
35 int next_frame;
36 int64_t plane_size[4];
37 int64_t frame_size;
38 int bit_depth;
39 cli_mmap_t mmap;
40 int use_mmap;
41 } raw_hnd_t;
42
open_file(char * psz_filename,hnd_t * p_handle,video_info_t * info,cli_input_opt_t * opt)43 static int open_file( char *psz_filename, hnd_t *p_handle, video_info_t *info, cli_input_opt_t *opt )
44 {
45 raw_hnd_t *h = calloc( 1, sizeof(raw_hnd_t) );
46 if( !h )
47 return -1;
48
49 if( !opt->resolution )
50 {
51 /* try to parse the file name */
52 for( char *p = psz_filename; *p; p++ )
53 if( *p >= '0' && *p <= '9' && sscanf( p, "%dx%d", &info->width, &info->height ) == 2 )
54 break;
55 }
56 else
57 sscanf( opt->resolution, "%dx%d", &info->width, &info->height );
58 FAIL_IF_ERROR( !info->width || !info->height, "raw input requires a resolution.\n" );
59 if( opt->colorspace )
60 {
61 for( info->csp = X264_CSP_CLI_MAX-1; info->csp > X264_CSP_NONE; info->csp-- )
62 {
63 if( x264_cli_csps[info->csp].name && !strcasecmp( x264_cli_csps[info->csp].name, opt->colorspace ) )
64 break;
65 }
66 FAIL_IF_ERROR( info->csp == X264_CSP_NONE, "unsupported colorspace `%s'\n", opt->colorspace );
67 }
68 else /* default */
69 info->csp = X264_CSP_I420;
70
71 h->bit_depth = opt->bit_depth;
72 FAIL_IF_ERROR( h->bit_depth < 8 || h->bit_depth > 16, "unsupported bit depth `%d'\n", h->bit_depth );
73 if( h->bit_depth > 8 )
74 info->csp |= X264_CSP_HIGH_DEPTH;
75
76 if( !strcmp( psz_filename, "-" ) )
77 h->fh = stdin;
78 else
79 h->fh = x264_fopen( psz_filename, "rb" );
80 if( h->fh == NULL )
81 return -1;
82
83 info->thread_safe = 1;
84 info->num_frames = 0;
85 info->vfr = 0;
86
87 const x264_cli_csp_t *csp = x264_cli_get_csp( info->csp );
88 for( int i = 0; i < csp->planes; i++ )
89 {
90 h->plane_size[i] = x264_cli_pic_plane_size( info->csp, info->width, info->height, i );
91 h->frame_size += h->plane_size[i];
92 /* x264_cli_pic_plane_size returns the size in bytes, we need the value in pixels from here on */
93 h->plane_size[i] /= x264_cli_csp_depth_factor( info->csp );
94 }
95
96 if( x264_is_regular_file( h->fh ) )
97 {
98 fseek( h->fh, 0, SEEK_END );
99 int64_t size = ftell( h->fh );
100 fseek( h->fh, 0, SEEK_SET );
101 info->num_frames = size / h->frame_size;
102 FAIL_IF_ERROR( !info->num_frames, "empty input file\n" );
103
104 /* Attempt to use memory-mapped input frames if possible */
105 if( !(h->bit_depth & 7) )
106 h->use_mmap = !x264_cli_mmap_init( &h->mmap, h->fh );
107 }
108
109 *p_handle = h;
110 return 0;
111 }
112
read_frame_internal(cli_pic_t * pic,raw_hnd_t * h,int bit_depth_uc)113 static int read_frame_internal( cli_pic_t *pic, raw_hnd_t *h, int bit_depth_uc )
114 {
115 int pixel_depth = x264_cli_csp_depth_factor( pic->img.csp );
116
117 for( int i = 0; i < pic->img.planes; i++ )
118 {
119 if( h->use_mmap )
120 {
121 if( i )
122 pic->img.plane[i] = pic->img.plane[i-1] + pixel_depth * h->plane_size[i-1];
123 }
124 else if( fread( pic->img.plane[i], pixel_depth, h->plane_size[i], h->fh ) != (uint64_t)h->plane_size[i] )
125 return -1;
126
127 if( bit_depth_uc )
128 {
129 /* upconvert non 16bit high depth planes to 16bit using the same
130 * algorithm as used in the depth filter. */
131 uint16_t *plane = (uint16_t*)pic->img.plane[i];
132 int64_t pixel_count = h->plane_size[i];
133 int lshift = 16 - h->bit_depth;
134 for( int64_t j = 0; j < pixel_count; j++ )
135 plane[j] = plane[j] << lshift;
136 }
137 }
138 return 0;
139 }
140
read_frame(cli_pic_t * pic,hnd_t handle,int i_frame)141 static int read_frame( cli_pic_t *pic, hnd_t handle, int i_frame )
142 {
143 raw_hnd_t *h = handle;
144
145 if( h->use_mmap )
146 {
147 pic->img.plane[0] = x264_cli_mmap( &h->mmap, i_frame * h->frame_size, h->frame_size );
148 if( !pic->img.plane[0] )
149 return -1;
150 }
151 else if( i_frame > h->next_frame )
152 {
153 if( x264_is_regular_file( h->fh ) )
154 fseek( h->fh, i_frame * h->frame_size, SEEK_SET );
155 else
156 while( i_frame > h->next_frame )
157 {
158 if( read_frame_internal( pic, h, 0 ) )
159 return -1;
160 h->next_frame++;
161 }
162 }
163
164 if( read_frame_internal( pic, h, h->bit_depth & 7 ) )
165 return -1;
166
167 h->next_frame = i_frame+1;
168 return 0;
169 }
170
release_frame(cli_pic_t * pic,hnd_t handle)171 static int release_frame( cli_pic_t *pic, hnd_t handle )
172 {
173 raw_hnd_t *h = handle;
174 if( h->use_mmap )
175 return x264_cli_munmap( &h->mmap, pic->img.plane[0], h->frame_size );
176 return 0;
177 }
178
picture_alloc(cli_pic_t * pic,hnd_t handle,int csp,int width,int height)179 static int picture_alloc( cli_pic_t *pic, hnd_t handle, int csp, int width, int height )
180 {
181 raw_hnd_t *h = handle;
182 return (h->use_mmap ? x264_cli_pic_init_noalloc : x264_cli_pic_alloc)( pic, csp, width, height );
183 }
184
picture_clean(cli_pic_t * pic,hnd_t handle)185 static void picture_clean( cli_pic_t *pic, hnd_t handle )
186 {
187 raw_hnd_t *h = handle;
188 if( h->use_mmap )
189 memset( pic, 0, sizeof(cli_pic_t) );
190 else
191 x264_cli_pic_clean( pic );
192 }
193
close_file(hnd_t handle)194 static int close_file( hnd_t handle )
195 {
196 raw_hnd_t *h = handle;
197 if( !h || !h->fh )
198 return 0;
199 if( h->use_mmap )
200 x264_cli_mmap_close( &h->mmap );
201 fclose( h->fh );
202 free( h );
203 return 0;
204 }
205
206 const cli_input_t raw_input = { open_file, picture_alloc, read_frame, release_frame, picture_clean, close_file };
207