1 /*****************************************************************************
2 * matroska.c: matroska muxer
3 *****************************************************************************
4 * Copyright (C) 2005-2021 x264 project
5 *
6 * Authors: Mike Matsnev <mike@haali.su>
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02111, USA.
21 *
22 * This program is also available under a commercial proprietary license.
23 * For more information, contact us at licensing@x264.com.
24 *****************************************************************************/
25
26 #include "output.h"
27 #include "matroska_ebml.h"
28
29 typedef struct
30 {
31 mk_writer *w;
32
33 int width, height, d_width, d_height;
34
35 int display_size_units;
36 int stereo_mode;
37
38 int64_t frame_duration;
39
40 char b_writing_frame;
41 uint32_t i_timebase_num;
42 uint32_t i_timebase_den;
43
44 } mkv_hnd_t;
45
open_file(char * psz_filename,hnd_t * p_handle,cli_output_opt_t * opt)46 static int open_file( char *psz_filename, hnd_t *p_handle, cli_output_opt_t *opt )
47 {
48 *p_handle = NULL;
49 mkv_hnd_t *p_mkv = calloc( 1, sizeof(mkv_hnd_t) );
50 if( !p_mkv )
51 return -1;
52
53 p_mkv->w = mk_create_writer( psz_filename );
54 if( !p_mkv->w )
55 {
56 free( p_mkv );
57 return -1;
58 }
59
60 *p_handle = p_mkv;
61
62 return 0;
63 }
64
65 #define STEREO_COUNT 7
66 static const uint8_t stereo_modes[STEREO_COUNT] = {5,9,7,1,3,13,0};
67 static const uint8_t stereo_w_div[STEREO_COUNT] = {1,2,1,2,1,1,1};
68 static const uint8_t stereo_h_div[STEREO_COUNT] = {1,1,2,1,2,1,1};
69
set_param(hnd_t handle,x264_param_t * p_param)70 static int set_param( hnd_t handle, x264_param_t *p_param )
71 {
72 mkv_hnd_t *p_mkv = handle;
73 int64_t dw, dh;
74
75 if( p_param->i_fps_num > 0 && !p_param->b_vfr_input )
76 {
77 p_mkv->frame_duration = (int64_t)p_param->i_fps_den *
78 (int64_t)1000000000 / p_param->i_fps_num;
79 }
80 else
81 {
82 p_mkv->frame_duration = 0;
83 }
84
85 dw = p_mkv->width = p_param->i_width;
86 dh = p_mkv->height = p_param->i_height;
87 p_mkv->display_size_units = DS_PIXELS;
88 p_mkv->stereo_mode = -1;
89 if( p_param->i_frame_packing >= 0 && p_param->i_frame_packing < STEREO_COUNT )
90 {
91 p_mkv->stereo_mode = stereo_modes[p_param->i_frame_packing];
92 dw /= stereo_w_div[p_param->i_frame_packing];
93 dh /= stereo_h_div[p_param->i_frame_packing];
94 }
95 if( p_param->vui.i_sar_width && p_param->vui.i_sar_height
96 && p_param->vui.i_sar_width != p_param->vui.i_sar_height )
97 {
98 if( p_param->vui.i_sar_width > p_param->vui.i_sar_height )
99 {
100 dw = dw * p_param->vui.i_sar_width / p_param->vui.i_sar_height;
101 }
102 else
103 {
104 dh = dh * p_param->vui.i_sar_height / p_param->vui.i_sar_width;
105 }
106 }
107 p_mkv->d_width = (int)dw;
108 p_mkv->d_height = (int)dh;
109
110 p_mkv->i_timebase_num = p_param->i_timebase_num;
111 p_mkv->i_timebase_den = p_param->i_timebase_den;
112
113 return 0;
114 }
115
write_headers(hnd_t handle,x264_nal_t * p_nal)116 static int write_headers( hnd_t handle, x264_nal_t *p_nal )
117 {
118 mkv_hnd_t *p_mkv = handle;
119
120 int sps_size = p_nal[0].i_payload - 4;
121 int pps_size = p_nal[1].i_payload - 4;
122 int sei_size = p_nal[2].i_payload;
123
124 uint8_t *sps = p_nal[0].p_payload + 4;
125 uint8_t *pps = p_nal[1].p_payload + 4;
126 uint8_t *sei = p_nal[2].p_payload;
127
128 int ret;
129 uint8_t *avcC;
130 int avcC_len;
131
132 if( !p_mkv->width || !p_mkv->height ||
133 !p_mkv->d_width || !p_mkv->d_height )
134 return -1;
135
136 avcC_len = 5 + 1 + 2 + sps_size + 1 + 2 + pps_size;
137 avcC = malloc( avcC_len );
138 if( !avcC )
139 return -1;
140
141 avcC[0] = 1;
142 avcC[1] = sps[1];
143 avcC[2] = sps[2];
144 avcC[3] = sps[3];
145 avcC[4] = 0xff; // nalu size length is four bytes
146 avcC[5] = 0xe1; // one sps
147
148 avcC[6] = sps_size >> 8;
149 avcC[7] = sps_size;
150
151 memcpy( avcC+8, sps, sps_size );
152
153 avcC[8+sps_size] = 1; // one pps
154 avcC[9+sps_size] = pps_size >> 8;
155 avcC[10+sps_size] = pps_size;
156
157 memcpy( avcC+11+sps_size, pps, pps_size );
158
159 ret = mk_write_header( p_mkv->w, "x264" X264_VERSION, "V_MPEG4/ISO/AVC",
160 avcC, avcC_len, p_mkv->frame_duration, 50000,
161 p_mkv->width, p_mkv->height,
162 p_mkv->d_width, p_mkv->d_height, p_mkv->display_size_units, p_mkv->stereo_mode );
163 free( avcC );
164
165 if( ret < 0 )
166 return ret;
167
168 // SEI
169
170 if( !p_mkv->b_writing_frame )
171 {
172 if( mk_start_frame( p_mkv->w ) < 0 )
173 return -1;
174 p_mkv->b_writing_frame = 1;
175 }
176 if( mk_add_frame_data( p_mkv->w, sei, sei_size ) < 0 )
177 return -1;
178
179 return sei_size + sps_size + pps_size;
180 }
181
write_frame(hnd_t handle,uint8_t * p_nalu,int i_size,x264_picture_t * p_picture)182 static int write_frame( hnd_t handle, uint8_t *p_nalu, int i_size, x264_picture_t *p_picture )
183 {
184 mkv_hnd_t *p_mkv = handle;
185
186 if( !p_mkv->b_writing_frame )
187 {
188 if( mk_start_frame( p_mkv->w ) < 0 )
189 return -1;
190 p_mkv->b_writing_frame = 1;
191 }
192
193 if( mk_add_frame_data( p_mkv->w, p_nalu, i_size ) < 0 )
194 return -1;
195
196 int64_t i_stamp = (int64_t)((p_picture->i_pts * 1e9 * p_mkv->i_timebase_num / p_mkv->i_timebase_den) + 0.5);
197
198 p_mkv->b_writing_frame = 0;
199
200 if( mk_set_frame_flags( p_mkv->w, i_stamp, p_picture->b_keyframe, p_picture->i_type == X264_TYPE_B ) < 0 )
201 return -1;
202
203 return i_size;
204 }
205
close_file(hnd_t handle,int64_t largest_pts,int64_t second_largest_pts)206 static int close_file( hnd_t handle, int64_t largest_pts, int64_t second_largest_pts )
207 {
208 mkv_hnd_t *p_mkv = handle;
209 int ret;
210 int64_t i_last_delta;
211
212 i_last_delta = p_mkv->i_timebase_den ? (int64_t)(((largest_pts - second_largest_pts) * p_mkv->i_timebase_num / p_mkv->i_timebase_den) + 0.5) : 0;
213
214 ret = mk_close( p_mkv->w, i_last_delta );
215
216 free( p_mkv );
217
218 return ret;
219 }
220
221 const cli_output_t mkv_output = { open_file, set_param, write_headers, write_frame, close_file };
222