FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavcodec/flvenc.c
Date: 2022-01-18 10:05:52
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 "h263data.h"
23 #include "mpegvideo.h"
24 #include "mpegvideodata.h"
25
26 390 void ff_flv_encode_picture_header(MpegEncContext *s, int picture_number)
27 {
28 int format;
29
30 390 align_put_bits(&s->pb);
31
32 390 put_bits(&s->pb, 17, 1);
33 /* 0: H.263 escape codes 1: 11-bit escape codes */
34 390 put_bits(&s->pb, 5, (s->h263_flv - 1));
35 390 put_bits(&s->pb, 8,
36 390 (((int64_t) s->picture_number * 30 * s->avctx->time_base.num) / // FIXME use timestamp
37 390 s->avctx->time_base.den) & 0xff); /* TemporalReference */
38
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390 if (s->width == 352 && s->height == 288)
39 200 format = 2;
40
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190 else if (s->width == 176 && s->height == 144)
41 format = 3;
42
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190 else if (s->width == 128 && s->height == 96)
43 format = 4;
44
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190 else if (s->width == 320 && s->height == 240)
45 140 format = 5;
46
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50 else if (s->width == 160 && s->height == 120)
47 format = 6;
48
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50 else if (s->width <= 255 && s->height <= 255)
49 50 format = 0; /* use 1 byte width & height */
50 else
51 format = 1; /* use 2 bytes width & height */
52 390 put_bits(&s->pb, 3, format); /* PictureSize */
53
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390 if (format == 0) {
54 50 put_bits(&s->pb, 8, s->width);
55 50 put_bits(&s->pb, 8, s->height);
56
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340 } else if (format == 1) {
57 put_bits(&s->pb, 16, s->width);
58 put_bits(&s->pb, 16, s->height);
59 }
60 390 put_bits(&s->pb, 2, s->pict_type == AV_PICTURE_TYPE_P); /* PictureType */
61 390 put_bits(&s->pb, 1, 1); /* DeblockingFlag: on */
62 390 put_bits(&s->pb, 5, s->qscale); /* Quantizer */
63 390 put_bits(&s->pb, 1, 0); /* ExtraInformation */
64
65
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390 if (s->h263_aic) {
66 s->y_dc_scale_table =
67 s->c_dc_scale_table = ff_aic_dc_scale_table;
68 } else {
69 390 s->y_dc_scale_table =
70 390 s->c_dc_scale_table = ff_mpeg1_dc_scale_table;
71 }
72 390 }
73
74 187500 void ff_flv2_encode_ac_esc(PutBitContext *pb, int slevel, int level,
75 int run, int last)
76 {
77
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187500 if (level < 64) { // 7-bit level
78 175592 put_bits(pb, 1, 0);
79 175592 put_bits(pb, 1, last);
80 175592 put_bits(pb, 6, run);
81
82 175592 put_sbits(pb, 7, slevel);
83 } else {
84 /* 11-bit level */
85 11908 put_bits(pb, 1, 1);
86 11908 put_bits(pb, 1, last);
87 11908 put_bits(pb, 6, run);
88
89 11908 put_sbits(pb, 11, slevel);
90 }
91 187500 }
92
93 const AVCodec ff_flv_encoder = {
94 .name = "flv",
95 .long_name = NULL_IF_CONFIG_SMALL("FLV / Sorenson Spark / Sorenson H.263 (Flash Video)"),
96 .type = AVMEDIA_TYPE_VIDEO,
97 .id = AV_CODEC_ID_FLV1,
98 .priv_class = &ff_mpv_enc_class,
99 .priv_data_size = sizeof(MpegEncContext),
100 .init = ff_mpv_encode_init,
101 .encode2 = ff_mpv_encode_picture,
102 .close = ff_mpv_encode_end,
103 .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE | FF_CODEC_CAP_INIT_CLEANUP,
104 .pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P,
105 AV_PIX_FMT_NONE},
106 };
107