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
|
/* $Id: enclame.c,v 1.9 2005/03/05 14:27:05 titer Exp $
This file is part of the HandBrake source code.
Homepage: <http://handbrake.m0k.org/>.
It may be used under the terms of the GNU General Public License. */
#include "hb.h"
#include "lame/lame.h"
int enclameInit( hb_work_object_t *, hb_job_t * );
int enclameWork( hb_work_object_t *, hb_buffer_t **, hb_buffer_t ** );
void enclameClose( hb_work_object_t * );
hb_work_object_t hb_enclame =
{
WORK_ENCLAME,
"MP3 encoder (libmp3lame)",
enclameInit,
enclameWork,
enclameClose
};
struct hb_work_private_s
{
hb_job_t * job;
/* LAME handle */
lame_global_flags * lame;
unsigned long input_samples;
unsigned long output_bytes;
uint8_t * buf;
hb_list_t * list;
int64_t pts;
};
int enclameInit( hb_work_object_t * w, hb_job_t * job )
{
hb_work_private_t * pv = calloc( 1, sizeof( hb_work_private_t ) );
w->private_data = pv;
pv->job = job;
hb_log( "enclame: opening libmp3lame" );
pv->lame = lame_init();
lame_set_brate( pv->lame, job->abitrate );
lame_set_in_samplerate( pv->lame, job->arate );
lame_set_out_samplerate( pv->lame, job->arate );
lame_init_params( pv->lame );
pv->input_samples = 1152 * 2;
pv->output_bytes = LAME_MAXMP3BUFFER;
pv->buf = malloc( pv->input_samples * sizeof( float ) );
pv->list = hb_list_init();
pv->pts = -1;
return 0;
}
/***********************************************************************
* Close
***********************************************************************
*
**********************************************************************/
void enclameClose( hb_work_object_t * w )
{
hb_work_private_t * pv = w->private_data;
lame_close( pv->lame );
hb_list_empty( &pv->list );
free( pv->buf );
free( pv );
w->private_data = NULL;
}
/***********************************************************************
* Encode
***********************************************************************
*
**********************************************************************/
static hb_buffer_t * Encode( hb_work_object_t * w )
{
hb_work_private_t * pv = w->private_data;
hb_buffer_t * buf;
int16_t samples_s16[1152 * 2];
uint64_t pts, pos;
int i;
if( hb_list_bytes( pv->list ) < pv->input_samples * sizeof( float ) )
{
return NULL;
}
hb_list_getbytes( pv->list, pv->buf, pv->input_samples * sizeof( float ),
&pts, &pos);
for( i = 0; i < 1152 * 2; i++ )
{
samples_s16[i] = ((float*) pv->buf)[i];
}
buf = hb_buffer_init( pv->output_bytes );
buf->start = pts + 90000 * pos / 2 / sizeof( float ) / pv->job->arate;
buf->stop = buf->start + 90000 * 1152 / pv->job->arate;
buf->size = lame_encode_buffer_interleaved( pv->lame, samples_s16,
1152, buf->data, LAME_MAXMP3BUFFER );
buf->frametype = HB_FRAME_AUDIO;
if( !buf->size )
{
/* Encoding was successful but we got no data. Try to encode
more */
hb_buffer_close( &buf );
return Encode( w );
}
else if( buf->size < 0 )
{
hb_log( "enclame: lame_encode_buffer failed" );
hb_buffer_close( &buf );
return NULL;
}
return buf;
}
/***********************************************************************
* Work
***********************************************************************
*
**********************************************************************/
int enclameWork( hb_work_object_t * w, hb_buffer_t ** buf_in,
hb_buffer_t ** buf_out )
{
hb_work_private_t * pv = w->private_data;
hb_buffer_t * buf;
hb_list_add( pv->list, *buf_in );
*buf_in = NULL;
*buf_out = buf = Encode( w );
while( buf )
{
buf->next = Encode( w );
buf = buf->next;
}
return HB_WORK_OK;
}
|
