FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavcodec/flvenc.c
Date: 2022-11-26 13:19:19
Exec Total Coverage
Lines: 40 48 83.3%
Branches: 17 32 53.1%

Line Branch Exec Source
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 "codec_internal.h"
22 #include "flvenc.h"
23 #include "h263data.h"
24 #include "mpegvideo.h"
25 #include "mpegvideodata.h"
26 #include "mpegvideoenc.h"
27
28 390 void ff_flv_encode_picture_header(MpegEncContext *s, int picture_number)
29 {
30 int format;
31
32 390 align_put_bits(&s->pb);
33
34 390 put_bits(&s->pb, 17, 1);
35 /* 0: H.263 escape codes 1: 11-bit escape codes */
36 390 put_bits(&s->pb, 5, (s->h263_flv - 1));
37 390 put_bits(&s->pb, 8,
38 390 (((int64_t) s->picture_number * 30 * s->avctx->time_base.num) / // FIXME use timestamp
39 390 s->avctx->time_base.den) & 0xff); /* TemporalReference */
40
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390 if (s->width == 352 && s->height == 288)
41 200 format = 2;
42
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190 else if (s->width == 176 && s->height == 144)
43 format = 3;
44
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190 else if (s->width == 128 && s->height == 96)
45 format = 4;
46
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190 else if (s->width == 320 && s->height == 240)
47 140 format = 5;
48
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50 else if (s->width == 160 && s->height == 120)
49 format = 6;
50
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50 else if (s->width <= 255 && s->height <= 255)
51 50 format = 0; /* use 1 byte width & height */
52 else
53 format = 1; /* use 2 bytes width & height */
54 390 put_bits(&s->pb, 3, format); /* PictureSize */
55
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390 if (format == 0) {
56 50 put_bits(&s->pb, 8, s->width);
57 50 put_bits(&s->pb, 8, s->height);
58
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340 } else if (format == 1) {
59 put_bits(&s->pb, 16, s->width);
60 put_bits(&s->pb, 16, s->height);
61 }
62 390 put_bits(&s->pb, 2, s->pict_type == AV_PICTURE_TYPE_P); /* PictureType */
63 390 put_bits(&s->pb, 1, 1); /* DeblockingFlag: on */
64 390 put_bits(&s->pb, 5, s->qscale); /* Quantizer */
65 390 put_bits(&s->pb, 1, 0); /* ExtraInformation */
66
67
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390 if (s->h263_aic) {
68 s->y_dc_scale_table =
69 s->c_dc_scale_table = ff_aic_dc_scale_table;
70 } else {
71 390 s->y_dc_scale_table =
72 390 s->c_dc_scale_table = ff_mpeg1_dc_scale_table;
73 }
74 390 }
75
76 187500 void ff_flv2_encode_ac_esc(PutBitContext *pb, int slevel, int level,
77 int run, int last)
78 {
79
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187500 if (level < 64) { // 7-bit level
80 175592 put_bits(pb, 1, 0);
81 175592 put_bits(pb, 1, last);
82 175592 put_bits(pb, 6, run);
83
84 175592 put_sbits(pb, 7, slevel);
85 } else {
86 /* 11-bit level */
87 11908 put_bits(pb, 1, 1);
88 11908 put_bits(pb, 1, last);
89 11908 put_bits(pb, 6, run);
90
91 11908 put_sbits(pb, 11, slevel);
92 }
93 187500 }
94
95 const FFCodec ff_flv_encoder = {
96 .p.name = "flv",
97 CODEC_LONG_NAME("FLV / Sorenson Spark / Sorenson H.263 (Flash Video)"),
98 .p.type = AVMEDIA_TYPE_VIDEO,
99 .p.id = AV_CODEC_ID_FLV1,
100 .p.priv_class = &ff_mpv_enc_class,
101 .priv_data_size = sizeof(MpegEncContext),
102 .init = ff_mpv_encode_init,
103 FF_CODEC_ENCODE_CB(ff_mpv_encode_picture),
104 .close = ff_mpv_encode_end,
105 .caps_internal = FF_CODEC_CAP_INIT_CLEANUP,
106 .p.pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P,
107 AV_PIX_FMT_NONE},
108 };
109