1 /*****************************************************************************
3 *****************************************************************************
4 * Copyright (C) 2012 Laurent Aimar
7 * Authors: Laurent Aimar <fenrir _AT_ videolan _DOT_ org>
9 * This program is free software; you can redistribute it and/or modify it
10 * under the terms of the GNU Lesser General Public License as published by
11 * the Free Software Foundation; either version 2.1 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU Lesser General Public License for more details.
19 * You should have received a copy of the GNU Lesser General Public License
20 * along with this program; if not, write to the Free Software Foundation,
21 * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
22 *****************************************************************************/
28 #include <vlc_common.h>
29 #include <vlc_plugin.h>
30 #include <vlc_codec.h>
32 #include "../demux/rawdv.h"
34 /*****************************************************************************
36 *****************************************************************************/
37 static int Open(vlc_object_t
*);
38 static void Close(vlc_object_t
*);
41 set_description(N_("Ulead DV audio decoder"))
42 set_capability("decoder", 50)
43 set_category(CAT_INPUT
)
44 set_subcategory(SUBCAT_INPUT_ACODEC
)
45 set_callbacks(Open
, Close
)
54 uint16_t shuffle
[2000];
57 static void Flush(decoder_t
*dec
)
59 decoder_sys_t
*sys
= dec
->p_sys
;
61 date_Set(&sys
->end_date
, 0);
64 static block_t
*Decode(decoder_t
*dec
, block_t
**block_ptr
)
66 decoder_sys_t
*sys
= dec
->p_sys
;
68 if (!block_ptr
|| !*block_ptr
)
71 block_t
*block
= *block_ptr
;
72 if (block
->i_flags
& (BLOCK_FLAG_DISCONTINUITY
|BLOCK_FLAG_CORRUPTED
)) {
74 if (block
->i_flags
& BLOCK_FLAG_CORRUPTED
) {
81 if (block
->i_pts
> VLC_TS_INVALID
&&
82 block
->i_pts
!= date_Get(&sys
->end_date
))
83 date_Set(&sys
->end_date
, block
->i_pts
);
84 block
->i_pts
= VLC_TS_INVALID
;
85 if (!date_Get(&sys
->end_date
)) {
86 /* We've just started the stream, wait for the first PTS. */
91 const unsigned int block_size
= sys
->is_pal
? 8640 : 7200;
92 if (block
->i_buffer
>= block_size
) {
93 uint8_t *src
= block
->p_buffer
;
95 block
->i_buffer
-= block_size
;
96 block
->p_buffer
+= block_size
;
98 int sample_count
= dv_get_audio_sample_count(&src
[244], sys
->is_pal
);
100 if( decoder_UpdateAudioFormat(dec
))
102 block_t
*output
= decoder_NewAudioBuffer(dec
, sample_count
);
105 output
->i_pts
= date_Get(&sys
->end_date
);
106 output
->i_length
= date_Increment(&sys
->end_date
, sample_count
) - output
->i_pts
;
108 int16_t *dst
= (int16_t*)output
->p_buffer
;
109 for (int i
= 0; i
< sample_count
; i
++) {
110 const uint8_t *v
= &src
[sys
->shuffle
[i
]];
112 *dst
++ = dv_audio_12to16((v
[0] << 4) | ((v
[2] >> 4) & 0x0f));
113 *dst
++ = dv_audio_12to16((v
[1] << 4) | ((v
[2] >> 0) & 0x0f));
115 *dst
++ = GetWBE(&v
[0]);
116 *dst
++ = GetWBE(&v
[sys
->is_pal
? 4320 : 3600]);
121 block_Release(block
);
125 static int Open(vlc_object_t
*object
)
127 decoder_t
*dec
= (decoder_t
*)object
;
129 if (dec
->fmt_in
.i_codec
!= VLC_CODEC_ULEAD_DV_AUDIO_NTSC
&&
130 dec
->fmt_in
.i_codec
!= VLC_CODEC_ULEAD_DV_AUDIO_PAL
)
132 if (dec
->fmt_in
.audio
.i_bitspersample
!= 12 && dec
->fmt_in
.audio
.i_bitspersample
!= 16)
134 if (dec
->fmt_in
.audio
.i_channels
!= 2)
136 if (dec
->fmt_in
.audio
.i_rate
<= 0)
139 decoder_sys_t
*sys
= dec
->p_sys
= malloc(sizeof(*sys
));
143 sys
->is_pal
= dec
->fmt_in
.i_codec
== VLC_CODEC_ULEAD_DV_AUDIO_PAL
;
144 sys
->is_12bit
= dec
->fmt_in
.audio
.i_bitspersample
== 12;
146 date_Init(&sys
->end_date
, dec
->fmt_in
.audio
.i_rate
, 1);
147 date_Set(&sys
->end_date
, 0);
149 for (unsigned i
= 0; i
< sizeof(sys
->shuffle
) / sizeof(*sys
->shuffle
); i
++) {
150 const unsigned a
= sys
->is_pal
? 18 : 15;
151 const unsigned b
= 3 * a
;
152 sys
->shuffle
[i
] = 80 * ((21 * (i
% 3) + 9 * (i
/ 3) + ((i
/ a
) % 3)) % b
) +
153 (2 + sys
->is_12bit
) * (i
/ b
) + 8;
156 es_format_Init(&dec
->fmt_out
, AUDIO_ES
, VLC_CODEC_S16N
);
157 dec
->fmt_out
.audio
.i_rate
= dec
->fmt_in
.audio
.i_rate
;
158 dec
->fmt_out
.audio
.i_channels
= 2;
159 dec
->fmt_out
.audio
.i_physical_channels
=
160 dec
->fmt_out
.audio
.i_original_channels
= AOUT_CHAN_LEFT
| AOUT_CHAN_RIGHT
;
162 dec
->pf_decode_audio
= Decode
;
163 dec
->pf_flush
= Flush
;
168 static void Close(vlc_object_t
*object
)
170 decoder_t
*dec
= (decoder_t
*)object
;