FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavformat/ivfenc.c
Date: 2024-02-29 09:57:37
Exec Total Coverage
Lines: 47 57 82.5%
Functions: 4 4 100.0%
Branches: 11 26 42.3%

Line Branch Exec Source
1 /*
2 * Copyright (c) 2010 Reimar Döffinger
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 #include "avformat.h"
21 #include "internal.h"
22 #include "mux.h"
23 #include "libavutil/intreadwrite.h"
24
25 typedef struct IVFEncContext {
26 unsigned frame_cnt;
27 uint64_t last_pts, sum_delta_pts, last_pkt_duration;
28 } IVFEncContext;
29
30 14 static int ivf_init(AVFormatContext *s)
31 {
32 AVCodecParameters *par;
33
34
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14 if (s->nb_streams != 1) {
35 av_log(s, AV_LOG_ERROR, "Format supports only exactly one video stream\n");
36 return AVERROR(EINVAL);
37 }
38 14 par = s->streams[0]->codecpar;
39
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14 if (par->codec_type != AVMEDIA_TYPE_VIDEO ||
40
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14 !(par->codec_id == AV_CODEC_ID_AV1 ||
41
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14 par->codec_id == AV_CODEC_ID_VP8 ||
42
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14 par->codec_id == AV_CODEC_ID_VP9)) {
43 av_log(s, AV_LOG_ERROR, "Currently only VP8, VP9 and AV1 are supported!\n");
44 return AVERROR(EINVAL);
45 }
46
47
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14 if (par->codec_id == AV_CODEC_ID_VP9) {
48 14 int ret = ff_stream_add_bitstream_filter(s->streams[0], "vp9_superframe", NULL);
49
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14 if (ret < 0)
50 return ret;
51 } else if (par->codec_id == AV_CODEC_ID_AV1) {
52 int ret = ff_stream_add_bitstream_filter(s->streams[0], "av1_metadata", "td=insert");
53 if (ret < 0)
54 return ret;
55 }
56
57 14 return 0;
58 }
59
60 14 static int ivf_write_header(AVFormatContext *s)
61 {
62 14 AVCodecParameters *par = s->streams[0]->codecpar;
63 14 AVIOContext *pb = s->pb;
64
65 14 avio_write(pb, "DKIF", 4);
66 14 avio_wl16(pb, 0); // version
67 14 avio_wl16(pb, 32); // header length
68 14 avio_wl32(pb,
69
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14 par->codec_id == AV_CODEC_ID_VP9 ? AV_RL32("VP90") :
70 par->codec_id == AV_CODEC_ID_VP8 ? AV_RL32("VP80") : AV_RL32("AV01"));
71 14 avio_wl16(pb, par->width);
72 14 avio_wl16(pb, par->height);
73 14 avio_wl32(pb, s->streams[0]->time_base.den);
74 14 avio_wl32(pb, s->streams[0]->time_base.num);
75 14 avio_wl32(pb, 0xFFFFFFFF); // "number of frames" is overwritten at the end of muxing
76 14 avio_wl32(pb, 0); // unused
77
78 14 return 0;
79 }
80
81 183 static int ivf_write_packet(AVFormatContext *s, AVPacket *pkt)
82 {
83 183 AVIOContext *pb = s->pb;
84 183 IVFEncContext *ctx = s->priv_data;
85
86 183 avio_wl32(pb, pkt->size);
87 183 avio_wl64(pb, pkt->pts);
88 183 avio_write(pb, pkt->data, pkt->size);
89
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183 if (ctx->frame_cnt)
90 169 ctx->sum_delta_pts += pkt->pts - ctx->last_pts;
91 183 ctx->last_pkt_duration = pkt->duration;
92 183 ctx->frame_cnt++;
93 183 ctx->last_pts = pkt->pts;
94
95 183 return 0;
96 }
97
98 14 static int ivf_write_trailer(AVFormatContext *s)
99 {
100 14 AVIOContext *pb = s->pb;
101 14 IVFEncContext *ctx = s->priv_data;
102
103 // overwrite the "number of frames"
104
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14 if ((pb->seekable & AVIO_SEEKABLE_NORMAL)) {
105 14 int64_t end = avio_tell(pb);
106
107 14 avio_seek(pb, 24, SEEK_SET);
108 14 avio_wl32(pb, ctx->frame_cnt);
109 14 avio_seek(pb, end, SEEK_SET);
110 }
111
112 14 return 0;
113 }
114
115 static const AVCodecTag codec_ivf_tags[] = {
116 { AV_CODEC_ID_VP8, MKTAG('V', 'P', '8', '0') },
117 { AV_CODEC_ID_VP9, MKTAG('V', 'P', '9', '0') },
118 { AV_CODEC_ID_AV1, MKTAG('A', 'V', '0', '1') },
119 { AV_CODEC_ID_NONE, 0 }
120 };
121
122 const FFOutputFormat ff_ivf_muxer = {
123 .p.name = "ivf",
124 .p.long_name = NULL_IF_CONFIG_SMALL("On2 IVF"),
125 .p.extensions = "ivf",
126 .p.audio_codec = AV_CODEC_ID_NONE,
127 .p.video_codec = AV_CODEC_ID_VP8,
128 .p.codec_tag = (const AVCodecTag* const []){ codec_ivf_tags, 0 },
129 .priv_data_size = sizeof(IVFEncContext),
130 .init = ivf_init,
131 .write_header = ivf_write_header,
132 .write_packet = ivf_write_packet,
133 .write_trailer = ivf_write_trailer,
134 };
135