FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavcodec/flvenc.c
Date: 2021-09-16 08:47:15
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 "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 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
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390 if (s->width == 352 && s->height == 288)
40 200 format = 2;
41
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190 else if (s->width == 176 && s->height == 144)
42 format = 3;
43
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190 else if (s->width == 128 && s->height == 96)
44 format = 4;
45
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190 else if (s->width == 320 && s->height == 240)
46 140 format = 5;
47
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50 else if (s->width == 160 && s->height == 120)
48 format = 6;
49
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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
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390 if (format == 0) {
55 50 put_bits(&s->pb, 8, s->width);
56 50 put_bits(&s->pb, 8, s->height);
57
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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
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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
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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 const AVCodec ff_flv_encoder = {
95 .name = "flv",
96 .long_name = NULL_IF_CONFIG_SMALL("FLV / Sorenson Spark / Sorenson H.263 (Flash Video)"),
97 .type = AVMEDIA_TYPE_VIDEO,
98 .id = AV_CODEC_ID_FLV1,
99 .priv_class = &ff_mpv_enc_class,
100 .priv_data_size = sizeof(MpegEncContext),
101 .init = ff_mpv_encode_init,
102 .encode2 = ff_mpv_encode_picture,
103 .close = ff_mpv_encode_end,
104 .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE | FF_CODEC_CAP_INIT_CLEANUP,
105 .pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P,
106 AV_PIX_FMT_NONE},
107 };
108