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
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
|
/* $Id: encavcodec.c,v 1.23 2005/10/13 23:47:06 titer Exp $
This file is part of the HandBrake source code.
Homepage: <http://handbrake.fr/>.
It may be used under the terms of the GNU General Public License. */
#include "hb.h"
#include "hbffmpeg.h"
struct hb_work_private_s
{
hb_job_t * job;
AVCodecContext * context;
FILE * file;
};
int encavcodecInit( hb_work_object_t *, hb_job_t * );
int encavcodecWork( hb_work_object_t *, hb_buffer_t **, hb_buffer_t ** );
void encavcodecClose( hb_work_object_t * );
hb_work_object_t hb_encavcodec =
{
WORK_ENCAVCODEC,
"MPEG-4 encoder (libavcodec)",
encavcodecInit,
encavcodecWork,
encavcodecClose
};
int encavcodecInit( hb_work_object_t * w, hb_job_t * job )
{
AVCodec * codec;
AVCodecContext * context;
int rate_num, rate_den;
hb_work_private_t * pv = calloc( 1, sizeof( hb_work_private_t ) );
w->private_data = pv;
pv->job = job;
codec = avcodec_find_encoder( CODEC_ID_MPEG4 );
if( !codec )
{
hb_log( "hb_work_encavcodec_init: avcodec_find_encoder "
"failed" );
}
context = avcodec_alloc_context();
if( job->vquality < 0.0 )
{
/* Rate control */
context->bit_rate = 1000 * job->vbitrate;
context->bit_rate_tolerance = 10 * context->bit_rate;
}
else
{
/* Constant quantizer */
// These settings produce better image quality than
// what was previously used
context->flags |= CODEC_FLAG_QSCALE;
if (job->vquality < 1.0)
{
float vquality;
vquality = 31 - job->vquality * 31;
// A value of 0 has undefined behavior
// and ffmpeg qp has integral increments
if (vquality < 1.0)
vquality = 1.0;
context->global_quality = FF_QP2LAMBDA * vquality + 0.5;
}
else
{
context->global_quality = FF_QP2LAMBDA * job->vquality + 0.5;
}
context->mb_decision = 1;
hb_log( "encavcodec: encoding at constant quantizer %d",
context->global_quality );
}
context->width = job->width;
context->height = job->height;
rate_num = job->vrate_base;
rate_den = job->vrate;
if (rate_den == 27000000)
{
int ii;
for (ii = 0; ii < hb_video_rates_count; ii++)
{
if (abs(rate_num - hb_video_rates[ii].rate) < 10)
{
rate_num = hb_video_rates[ii].rate;
break;
}
}
}
hb_reduce(&rate_num, &rate_den, rate_num, rate_den);
if ((rate_num & ~0xFFFF) || (rate_den & ~0xFFFF))
{
hb_log( "encavcodec: truncating framerate %d / %d",
rate_num, rate_den );
}
while ((rate_num & ~0xFFFF) || (rate_den & ~0xFFFF))
{
rate_num >>= 1;
rate_den >>= 1;
}
context->time_base = (AVRational) { rate_num, rate_den };
context->gop_size = 10 * job->vrate / job->vrate_base;
context->pix_fmt = PIX_FMT_YUV420P;
if( job->pixel_ratio )
{
context->sample_aspect_ratio.num = job->pixel_aspect_width;
context->sample_aspect_ratio.den = job->pixel_aspect_height;
hb_log( "encavcodec: encoding with stored aspect %d/%d",
job->pixel_aspect_width, job->pixel_aspect_height );
}
if( job->mux & ( HB_MUX_MP4 | HB_MUX_PSP ) )
{
context->flags |= CODEC_FLAG_GLOBAL_HEADER;
}
if( job->mux & HB_MUX_PSP )
{
context->flags |= CODEC_FLAG_BITEXACT;
}
if( job->grayscale )
{
context->flags |= CODEC_FLAG_GRAY;
}
if( job->pass != 0 && job->pass != -1 )
{
char filename[1024]; memset( filename, 0, 1024 );
hb_get_tempory_filename( job->h, filename, "ffmpeg.log" );
if( job->pass == 1 )
{
pv->file = fopen( filename, "wb" );
context->flags |= CODEC_FLAG_PASS1;
}
else
{
int size;
char * log;
pv->file = fopen( filename, "rb" );
fseek( pv->file, 0, SEEK_END );
size = ftell( pv->file );
fseek( pv->file, 0, SEEK_SET );
log = malloc( size + 1 );
log[size] = '\0';
fread( log, size, 1, pv->file );
fclose( pv->file );
pv->file = NULL;
context->flags |= CODEC_FLAG_PASS2;
context->stats_in = log;
}
}
if( hb_avcodec_open( context, codec ) )
{
hb_log( "hb_work_encavcodec_init: avcodec_open failed" );
}
pv->context = context;
if( ( job->mux & ( HB_MUX_MP4 | HB_MUX_PSP ) ) && job->pass != 1 )
{
#if 0
/* Hem hem */
w->config->mpeg4.length = 15;
memcpy( w->config->mpeg4.bytes, context->extradata + 15, 15 );
#else
w->config->mpeg4.length = context->extradata_size;
memcpy( w->config->mpeg4.bytes, context->extradata,
context->extradata_size );
#endif
}
return 0;
}
/***********************************************************************
* Close
***********************************************************************
*
**********************************************************************/
void encavcodecClose( hb_work_object_t * w )
{
hb_work_private_t * pv = w->private_data;
if( pv->context )
{
hb_deep_log( 2, "encavcodec: closing libavcodec" );
avcodec_flush_buffers( pv->context );
hb_avcodec_close( pv->context );
}
if( pv->file )
{
fclose( pv->file );
}
free( pv );
w->private_data = NULL;
}
/***********************************************************************
* Work
***********************************************************************
*
**********************************************************************/
int encavcodecWork( hb_work_object_t * w, hb_buffer_t ** buf_in,
hb_buffer_t ** buf_out )
{
hb_work_private_t * pv = w->private_data;
hb_job_t * job = pv->job;
AVFrame * frame;
hb_buffer_t * in = *buf_in, * buf;
if ( in->size <= 0 )
{
/* EOF on input - send it downstream & say we're done */
*buf_out = in;
*buf_in = NULL;
return HB_WORK_DONE;
}
frame = avcodec_alloc_frame();
frame->data[0] = in->data;
frame->data[1] = frame->data[0] + job->width * job->height;
frame->data[2] = frame->data[1] + job->width * job->height / 4;
frame->linesize[0] = job->width;
frame->linesize[1] = job->width / 2;
frame->linesize[2] = job->width / 2;
// For constant quality, setting the quality in AVCodecContext
// doesn't do the trick. It must be set in the AVFrame.
frame->quality = pv->context->global_quality;
/* Should be way too large */
buf = hb_video_buffer_init( job->width, job->height );
buf->size = avcodec_encode_video( pv->context, buf->data, buf->alloc,
frame );
buf->start = in->start;
buf->stop = in->stop;
buf->frametype = pv->context->coded_frame->key_frame ? HB_FRAME_KEY : HB_FRAME_REF;
av_free( frame );
if( job->pass == 1 )
{
/* Write stats */
fprintf( pv->file, "%s", pv->context->stats_out );
}
*buf_out = buf;
return HB_WORK_OK;
}
|
