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
|
/*
* H.264 encoding using the x264 library
* Copyright (C) 2005 Mans Rullgard <mru@inprovide.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "avcodec.h"
#include <x264.h>
typedef struct X264Context {
x264_param_t params;
x264_t *enc;
x264_picture_t pic;
AVFrame out_pic;
} X264Context;
static void
X264_log(void *p, int level, const char *fmt, va_list args)
{
static const int level_map[] = {
[X264_LOG_ERROR] = AV_LOG_ERROR,
[X264_LOG_WARNING] = AV_LOG_ERROR,
[X264_LOG_INFO] = AV_LOG_INFO,
[X264_LOG_DEBUG] = AV_LOG_DEBUG
};
if(level < 0 || level > X264_LOG_DEBUG)
return;
av_vlog(p, level_map[level], fmt, args);
}
static int
encode_nals(u_char *buf, int size, x264_nal_t *nals, int nnal)
{
u_char *p = buf;
int i;
for(i = 0; i < nnal; i++){
int s = x264_nal_encode(p, &size, 1, nals + i);
if(s < 0)
return -1;
p += s;
}
return p - buf;
}
extern int
X264_frame(AVCodecContext *ctx, uint8_t *buf, int bufsize, void *data)
{
X264Context *x4 = ctx->priv_data;
AVFrame *frame = data;
x264_nal_t *nal;
int nnal, i;
x264_picture_t pic_out;
x4->pic.img.i_csp = X264_CSP_I420;
x4->pic.img.i_plane = 3;
for(i = 0; i < 3; i++){
x4->pic.img.plane[i] = frame->data[i];
x4->pic.img.i_stride[i] = frame->linesize[i];
}
x4->pic.i_pts = frame->pts;
x4->pic.i_type = X264_TYPE_AUTO;
if(x264_encoder_encode(x4->enc, &nal, &nnal, &x4->pic, &pic_out))
return -1;
bufsize = encode_nals(buf, bufsize, nal, nnal);
if(bufsize < 0)
return -1;
/* FIXME: dts */
x4->out_pic.pts = pic_out.i_pts;
switch(pic_out.i_type){
case X264_TYPE_IDR:
case X264_TYPE_I:
x4->out_pic.pict_type = FF_I_TYPE;
break;
case X264_TYPE_P:
x4->out_pic.pict_type = FF_P_TYPE;
break;
case X264_TYPE_B:
case X264_TYPE_BREF:
x4->out_pic.pict_type = FF_B_TYPE;
break;
}
x4->out_pic.key_frame = pic_out.i_type == X264_TYPE_IDR;
x4->out_pic.quality = (pic_out.i_qpplus1 - 1) * FF_QP2LAMBDA;
return bufsize;
}
static int
X264_close(AVCodecContext *avctx)
{
X264Context *x4 = avctx->priv_data;
if(x4->enc)
x264_encoder_close(x4->enc);
return 0;
}
extern int
X264_init(AVCodecContext *avctx)
{
X264Context *x4 = avctx->priv_data;
x264_param_default(&x4->params);
x4->params.pf_log = X264_log;
x4->params.p_log_private = avctx;
x4->params.i_keyint_max = avctx->gop_size;
x4->params.rc.i_bitrate = avctx->bit_rate / 1000;
x4->params.rc.i_rc_buffer_size = avctx->rc_buffer_size / 1000;
if(avctx->rc_buffer_size)
x4->params.rc.b_cbr = 1;
x4->params.i_bframe = avctx->max_b_frames;
x4->params.b_cabac = avctx->coder_type == FF_CODER_TYPE_AC;
x4->params.rc.i_qp_min = avctx->qmin;
x4->params.rc.i_qp_max = avctx->qmax;
x4->params.rc.i_qp_step = avctx->max_qdiff;
if(avctx->flags & CODEC_FLAG_QSCALE && avctx->global_quality > 0)
x4->params.rc.i_qp_constant =
12 + 6 * log2((double) avctx->global_quality / FF_QP2LAMBDA);
x4->params.i_width = avctx->width;
x4->params.i_height = avctx->height;
x4->params.vui.i_sar_width = avctx->sample_aspect_ratio.num;
x4->params.vui.i_sar_height = avctx->sample_aspect_ratio.den;
x4->params.i_fps_num = avctx->frame_rate;
x4->params.i_fps_den = avctx->frame_rate_base;
x4->enc = x264_encoder_open(&x4->params);
if(!x4->enc)
return -1;
avctx->coded_frame = &x4->out_pic;
return 0;
}
AVCodec x264_encoder = {
.name = "h264",
.type = CODEC_TYPE_VIDEO,
.id = CODEC_ID_H264,
.priv_data_size = sizeof(X264Context),
.init = X264_init,
.encode = X264_frame,
.close = X264_close,
.pix_fmts = (enum PixelFormat[]) { PIX_FMT_YUV420P, -1 }
};
|
