1 |
|
|
/* |
2 |
|
|
* FLV Encoding specific code. |
3 |
|
|
* |
4 |
|
|
* This file is part of FFmpeg. |
5 |
|
|
* |
6 |
|
|
* FFmpeg is free software; you can redistribute it and/or |
7 |
|
|
* modify it under the terms of the GNU Lesser General Public |
8 |
|
|
* License as published by the Free Software Foundation; either |
9 |
|
|
* version 2.1 of the License, or (at your option) any later version. |
10 |
|
|
* |
11 |
|
|
* FFmpeg is distributed in the hope that it will be useful, |
12 |
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of |
13 |
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
14 |
|
|
* Lesser General Public License for more details. |
15 |
|
|
* |
16 |
|
|
* You should have received a copy of the GNU Lesser General Public |
17 |
|
|
* License along with FFmpeg; if not, write to the Free Software |
18 |
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
19 |
|
|
*/ |
20 |
|
|
|
21 |
|
|
#include "flv.h" |
22 |
|
|
#include "h263.h" |
23 |
|
|
#include "h263data.h" |
24 |
|
|
#include "mpegvideo.h" |
25 |
|
|
#include "mpegvideodata.h" |
26 |
|
|
|
27 |
|
390 |
void ff_flv_encode_picture_header(MpegEncContext *s, int picture_number) |
28 |
|
|
{ |
29 |
|
|
int format; |
30 |
|
|
|
31 |
|
390 |
avpriv_align_put_bits(&s->pb); |
32 |
|
|
|
33 |
|
390 |
put_bits(&s->pb, 17, 1); |
34 |
|
|
/* 0: H.263 escape codes 1: 11-bit escape codes */ |
35 |
|
390 |
put_bits(&s->pb, 5, (s->h263_flv - 1)); |
36 |
|
390 |
put_bits(&s->pb, 8, |
37 |
|
390 |
(((int64_t) s->picture_number * 30 * s->avctx->time_base.num) / // FIXME use timestamp |
38 |
|
390 |
s->avctx->time_base.den) & 0xff); /* TemporalReference */ |
39 |
✓✓✓✗
|
390 |
if (s->width == 352 && s->height == 288) |
40 |
|
200 |
format = 2; |
41 |
✗✓✗✗
|
190 |
else if (s->width == 176 && s->height == 144) |
42 |
|
|
format = 3; |
43 |
✗✓✗✗
|
190 |
else if (s->width == 128 && s->height == 96) |
44 |
|
|
format = 4; |
45 |
✓✓✓✗
|
190 |
else if (s->width == 320 && s->height == 240) |
46 |
|
140 |
format = 5; |
47 |
✗✓✗✗
|
50 |
else if (s->width == 160 && s->height == 120) |
48 |
|
|
format = 6; |
49 |
✓✗✓✗
|
50 |
else if (s->width <= 255 && s->height <= 255) |
50 |
|
50 |
format = 0; /* use 1 byte width & height */ |
51 |
|
|
else |
52 |
|
|
format = 1; /* use 2 bytes width & height */ |
53 |
|
390 |
put_bits(&s->pb, 3, format); /* PictureSize */ |
54 |
✓✓ |
390 |
if (format == 0) { |
55 |
|
50 |
put_bits(&s->pb, 8, s->width); |
56 |
|
50 |
put_bits(&s->pb, 8, s->height); |
57 |
✗✓ |
340 |
} else if (format == 1) { |
58 |
|
|
put_bits(&s->pb, 16, s->width); |
59 |
|
|
put_bits(&s->pb, 16, s->height); |
60 |
|
|
} |
61 |
|
390 |
put_bits(&s->pb, 2, s->pict_type == AV_PICTURE_TYPE_P); /* PictureType */ |
62 |
|
390 |
put_bits(&s->pb, 1, 1); /* DeblockingFlag: on */ |
63 |
|
390 |
put_bits(&s->pb, 5, s->qscale); /* Quantizer */ |
64 |
|
390 |
put_bits(&s->pb, 1, 0); /* ExtraInformation */ |
65 |
|
|
|
66 |
✗✓ |
390 |
if (s->h263_aic) { |
67 |
|
|
s->y_dc_scale_table = |
68 |
|
|
s->c_dc_scale_table = ff_aic_dc_scale_table; |
69 |
|
|
} else { |
70 |
|
390 |
s->y_dc_scale_table = |
71 |
|
390 |
s->c_dc_scale_table = ff_mpeg1_dc_scale_table; |
72 |
|
|
} |
73 |
|
390 |
} |
74 |
|
|
|
75 |
|
187500 |
void ff_flv2_encode_ac_esc(PutBitContext *pb, int slevel, int level, |
76 |
|
|
int run, int last) |
77 |
|
|
{ |
78 |
✓✓ |
187500 |
if (level < 64) { // 7-bit level |
79 |
|
175592 |
put_bits(pb, 1, 0); |
80 |
|
175592 |
put_bits(pb, 1, last); |
81 |
|
175592 |
put_bits(pb, 6, run); |
82 |
|
|
|
83 |
|
175592 |
put_sbits(pb, 7, slevel); |
84 |
|
|
} else { |
85 |
|
|
/* 11-bit level */ |
86 |
|
11908 |
put_bits(pb, 1, 1); |
87 |
|
11908 |
put_bits(pb, 1, last); |
88 |
|
11908 |
put_bits(pb, 6, run); |
89 |
|
|
|
90 |
|
11908 |
put_sbits(pb, 11, slevel); |
91 |
|
|
} |
92 |
|
187500 |
} |
93 |
|
|
|
94 |
|
|
static const AVClass flv_class = { |
95 |
|
|
.class_name = "flv encoder", |
96 |
|
|
.item_name = av_default_item_name, |
97 |
|
|
.option = ff_mpv_generic_options, |
98 |
|
|
.version = LIBAVUTIL_VERSION_INT, |
99 |
|
|
}; |
100 |
|
|
|
101 |
|
|
AVCodec ff_flv_encoder = { |
102 |
|
|
.name = "flv", |
103 |
|
|
.long_name = NULL_IF_CONFIG_SMALL("FLV / Sorenson Spark / Sorenson H.263 (Flash Video)"), |
104 |
|
|
.type = AVMEDIA_TYPE_VIDEO, |
105 |
|
|
.id = AV_CODEC_ID_FLV1, |
106 |
|
|
.priv_data_size = sizeof(MpegEncContext), |
107 |
|
|
.init = ff_mpv_encode_init, |
108 |
|
|
.encode2 = ff_mpv_encode_picture, |
109 |
|
|
.close = ff_mpv_encode_end, |
110 |
|
|
.caps_internal = FF_CODEC_CAP_INIT_CLEANUP, |
111 |
|
|
.pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P, |
112 |
|
|
AV_PIX_FMT_NONE}, |
113 |
|
|
.priv_class = &flv_class, |
114 |
|
|
}; |