matroska.c
6.22 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
/*****************************************************************************
* matroska.c: matroska muxer
*****************************************************************************
* Copyright (C) 2005-2024 x264 project
*
* Authors: Mike Matsnev <mike@haali.su>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02111, USA.
*
* This program is also available under a commercial proprietary license.
* For more information, contact us at licensing@x264.com.
*****************************************************************************/
#include "output.h"
#include "matroska_ebml.h"
typedef struct
{
mk_writer *w;
int width, height, d_width, d_height;
int display_size_units;
int stereo_mode;
int64_t frame_duration;
char b_writing_frame;
uint32_t i_timebase_num;
uint32_t i_timebase_den;
} mkv_hnd_t;
static int open_file( char *psz_filename, hnd_t *p_handle, cli_output_opt_t *opt )
{
*p_handle = NULL;
mkv_hnd_t *p_mkv = calloc( 1, sizeof(mkv_hnd_t) );
if( !p_mkv )
return -1;
p_mkv->w = mk_create_writer( psz_filename );
if( !p_mkv->w )
{
free( p_mkv );
return -1;
}
*p_handle = p_mkv;
return 0;
}
#define STEREO_COUNT 7
static const uint8_t stereo_modes[STEREO_COUNT] = {5,9,7,1,3,13,0};
static const uint8_t stereo_w_div[STEREO_COUNT] = {1,2,1,2,1,1,1};
static const uint8_t stereo_h_div[STEREO_COUNT] = {1,1,2,1,2,1,1};
static int set_param( hnd_t handle, x264_param_t *p_param )
{
mkv_hnd_t *p_mkv = handle;
int64_t dw, dh;
if( p_param->i_fps_num > 0 && !p_param->b_vfr_input )
{
p_mkv->frame_duration = (int64_t)p_param->i_fps_den *
(int64_t)1000000000 / p_param->i_fps_num;
}
else
{
p_mkv->frame_duration = 0;
}
dw = p_mkv->width = p_param->i_width;
dh = p_mkv->height = p_param->i_height;
p_mkv->display_size_units = DS_PIXELS;
p_mkv->stereo_mode = -1;
if( p_param->i_frame_packing >= 0 && p_param->i_frame_packing < STEREO_COUNT )
{
p_mkv->stereo_mode = stereo_modes[p_param->i_frame_packing];
dw /= stereo_w_div[p_param->i_frame_packing];
dh /= stereo_h_div[p_param->i_frame_packing];
}
if( p_param->vui.i_sar_width && p_param->vui.i_sar_height
&& p_param->vui.i_sar_width != p_param->vui.i_sar_height )
{
if( p_param->vui.i_sar_width > p_param->vui.i_sar_height )
{
dw = dw * p_param->vui.i_sar_width / p_param->vui.i_sar_height;
}
else
{
dh = dh * p_param->vui.i_sar_height / p_param->vui.i_sar_width;
}
}
p_mkv->d_width = (int)dw;
p_mkv->d_height = (int)dh;
p_mkv->i_timebase_num = p_param->i_timebase_num;
p_mkv->i_timebase_den = p_param->i_timebase_den;
return 0;
}
static int write_headers( hnd_t handle, x264_nal_t *p_nal )
{
mkv_hnd_t *p_mkv = handle;
int sps_size = p_nal[0].i_payload - 4;
int pps_size = p_nal[1].i_payload - 4;
int sei_size = p_nal[2].i_payload;
uint8_t *sps = p_nal[0].p_payload + 4;
uint8_t *pps = p_nal[1].p_payload + 4;
uint8_t *sei = p_nal[2].p_payload;
int ret;
uint8_t *avcC;
int avcC_len;
if( !p_mkv->width || !p_mkv->height ||
!p_mkv->d_width || !p_mkv->d_height )
return -1;
avcC_len = 5 + 1 + 2 + sps_size + 1 + 2 + pps_size;
avcC = malloc( avcC_len );
if( !avcC )
return -1;
avcC[0] = 1;
avcC[1] = sps[1];
avcC[2] = sps[2];
avcC[3] = sps[3];
avcC[4] = 0xff; // nalu size length is four bytes
avcC[5] = 0xe1; // one sps
avcC[6] = sps_size >> 8;
avcC[7] = sps_size;
memcpy( avcC+8, sps, sps_size );
avcC[8+sps_size] = 1; // one pps
avcC[9+sps_size] = pps_size >> 8;
avcC[10+sps_size] = pps_size;
memcpy( avcC+11+sps_size, pps, pps_size );
ret = mk_write_header( p_mkv->w, "x264" X264_VERSION, "V_MPEG4/ISO/AVC",
avcC, avcC_len, p_mkv->frame_duration, 50000,
p_mkv->width, p_mkv->height,
p_mkv->d_width, p_mkv->d_height, p_mkv->display_size_units, p_mkv->stereo_mode );
free( avcC );
if( ret < 0 )
return ret;
// SEI
if( !p_mkv->b_writing_frame )
{
if( mk_start_frame( p_mkv->w ) < 0 )
return -1;
p_mkv->b_writing_frame = 1;
}
if( mk_add_frame_data( p_mkv->w, sei, sei_size ) < 0 )
return -1;
return sei_size + sps_size + pps_size;
}
static int write_frame( hnd_t handle, uint8_t *p_nalu, int i_size, x264_picture_t *p_picture )
{
mkv_hnd_t *p_mkv = handle;
if( !p_mkv->b_writing_frame )
{
if( mk_start_frame( p_mkv->w ) < 0 )
return -1;
p_mkv->b_writing_frame = 1;
}
if( mk_add_frame_data( p_mkv->w, p_nalu, i_size ) < 0 )
return -1;
int64_t i_stamp = (int64_t)((p_picture->i_pts * 1e9 * p_mkv->i_timebase_num / p_mkv->i_timebase_den) + 0.5);
p_mkv->b_writing_frame = 0;
if( mk_set_frame_flags( p_mkv->w, i_stamp, p_picture->b_keyframe, p_picture->i_type == X264_TYPE_B ) < 0 )
return -1;
return i_size;
}
static int close_file( hnd_t handle, int64_t largest_pts, int64_t second_largest_pts )
{
mkv_hnd_t *p_mkv = handle;
int ret;
int64_t i_last_delta;
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;
ret = mk_close( p_mkv->w, i_last_delta );
free( p_mkv );
return ret;
}
const cli_output_t mkv_output = { open_file, set_param, write_headers, write_frame, close_file };