FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavformat/rawvideodec.c
Date: 2022-12-09 07:38:14
Exec Total Coverage
Lines: 32 56 57.1%
Functions: 2 2 100.0%
Branches: 12 28 42.9%

Line Branch Exec Source
1 /*
2 * RAW video demuxer
3 * Copyright (c) 2001 Fabrice Bellard
4 *
5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22 #include "config_components.h"
23
24 #include "libavutil/imgutils.h"
25 #include "libavutil/parseutils.h"
26 #include "libavutil/pixdesc.h"
27 #include "libavutil/opt.h"
28 #include "internal.h"
29 #include "avformat.h"
30
31 typedef struct RawVideoDemuxerContext {
32 const AVClass *class; /**< Class for private options. */
33 int width, height; /**< Integers describing video size, set by a private option. */
34 char *pixel_format; /**< Set by a private option. */
35 AVRational framerate; /**< AVRational describing framerate, set by a private option. */
36 } RawVideoDemuxerContext;
37
38 // v210 frame width is padded to multiples of 48
39 #define GET_PACKET_SIZE(w, h) (((w + 47) / 48) * 48 * h * 8 / 3)
40
41 516 static int rawvideo_read_header(AVFormatContext *ctx)
42 {
43 516 RawVideoDemuxerContext *s = ctx->priv_data;
44 enum AVPixelFormat pix_fmt;
45 AVStream *st;
46 int packet_size;
47 int ret;
48
49 516 st = avformat_new_stream(ctx, NULL);
50
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516 if (!st)
51 return AVERROR(ENOMEM);
52
53 516 st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
54
55 516 st->codecpar->codec_id = ctx->iformat->raw_codec_id;
56
57
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516 if ((ctx->iformat->raw_codec_id != AV_CODEC_ID_V210) &&
58
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516 (ctx->iformat->raw_codec_id != AV_CODEC_ID_V210X)) {
59
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516 if ((pix_fmt = av_get_pix_fmt(s->pixel_format)) == AV_PIX_FMT_NONE) {
60 av_log(ctx, AV_LOG_ERROR, "No such pixel format: %s.\n",
61 s->pixel_format);
62 return AVERROR(EINVAL);
63 }
64 }
65
66 516 avpriv_set_pts_info(st, 64, s->framerate.den, s->framerate.num);
67
68 516 ret = av_image_check_size(s->width, s->height, 0, ctx);
69
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516 if (ret < 0)
70 return ret;
71
72 516 st->codecpar->width = s->width;
73 516 st->codecpar->height = s->height;
74
75
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516 if (ctx->iformat->raw_codec_id == AV_CODEC_ID_BITPACKED) {
76 unsigned int pgroup; /* size of the pixel group in bytes */
77 unsigned int xinc;
78 const AVPixFmtDescriptor *desc;
79 int tag;
80
81 desc = av_pix_fmt_desc_get(pix_fmt);
82 st->codecpar->bits_per_coded_sample = av_get_bits_per_pixel(desc);
83 if (pix_fmt == AV_PIX_FMT_YUV422P10) {
84 tag = MKTAG('U', 'Y', 'V', 'Y');
85 pgroup = 5;
86 xinc = 2;
87 } else if (pix_fmt == AV_PIX_FMT_UYVY422) {
88 tag = MKTAG('U', 'Y', 'V', 'Y');
89 pgroup = 4;
90 xinc = 2;
91 st->codecpar->codec_id = AV_CODEC_ID_RAWVIDEO;
92 } else {
93 av_log(ctx, AV_LOG_ERROR, "unsupported format: %s for bitpacked.\n",
94 s->pixel_format);
95 return AVERROR(EINVAL);
96 }
97 st->codecpar->codec_tag = tag;
98 packet_size = s->width * s->height * pgroup / xinc;
99
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516 } else if ((ctx->iformat->raw_codec_id == AV_CODEC_ID_V210) ||
100
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516 (ctx->iformat->raw_codec_id == AV_CODEC_ID_V210X)) {
101 pix_fmt = ctx->iformat->raw_codec_id == AV_CODEC_ID_V210 ?
102 AV_PIX_FMT_YUV422P10 : AV_PIX_FMT_YUV422P16;
103
104 packet_size = GET_PACKET_SIZE(s->width, s->height);
105 } else {
106 516 packet_size = av_image_get_buffer_size(pix_fmt, s->width, s->height, 1);
107
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516 if (packet_size < 0)
108 return packet_size;
109 }
110
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516 if (packet_size == 0)
111 return AVERROR(EINVAL);
112
113 516 st->codecpar->format = pix_fmt;
114 516 ctx->packet_size = packet_size;
115 516 st->codecpar->bit_rate = av_rescale_q(ctx->packet_size,
116 516 (AVRational){8,1}, st->time_base);
117
118 516 return 0;
119 }
120
121
122 20893 static int rawvideo_read_packet(AVFormatContext *s, AVPacket *pkt)
123 {
124 int ret;
125
126 20893 ret = av_get_packet(s->pb, pkt, s->packet_size);
127 20893 pkt->pts = pkt->dts = pkt->pos / s->packet_size;
128
129 20893 pkt->stream_index = 0;
130
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20893 if (ret < 0)
131 418 return ret;
132 20475 return 0;
133 }
134
135 #define OFFSET(x) offsetof(RawVideoDemuxerContext, x)
136 #define DEC AV_OPT_FLAG_DECODING_PARAM
137 static const AVOption rawvideo_options[] = {
138 /* pixel_format is not used by the v210 demuxers. */
139 { "pixel_format", "set pixel format", OFFSET(pixel_format), AV_OPT_TYPE_STRING, {.str = "yuv420p"}, 0, 0, DEC },
140 { "video_size", "set frame size", OFFSET(width), AV_OPT_TYPE_IMAGE_SIZE, {.str = NULL}, 0, 0, DEC },
141 { "framerate", "set frame rate", OFFSET(framerate), AV_OPT_TYPE_VIDEO_RATE, {.str = "25"}, 0, INT_MAX, DEC },
142 { NULL },
143 };
144
145 static const AVClass rawvideo_demuxer_class = {
146 .class_name = "rawvideo demuxer",
147 .item_name = av_default_item_name,
148 .option = rawvideo_options,
149 .version = LIBAVUTIL_VERSION_INT,
150 };
151
152 const AVInputFormat ff_rawvideo_demuxer = {
153 .name = "rawvideo",
154 .long_name = NULL_IF_CONFIG_SMALL("raw video"),
155 .priv_data_size = sizeof(RawVideoDemuxerContext),
156 .read_header = rawvideo_read_header,
157 .read_packet = rawvideo_read_packet,
158 .flags = AVFMT_GENERIC_INDEX,
159 .extensions = "yuv,cif,qcif,rgb",
160 .raw_codec_id = AV_CODEC_ID_RAWVIDEO,
161 .priv_class = &rawvideo_demuxer_class,
162 };
163
164 static const AVClass bitpacked_demuxer_class = {
165 .class_name = "bitpacked demuxer",
166 .item_name = av_default_item_name,
167 .option = rawvideo_options,
168 .version = LIBAVUTIL_VERSION_INT,
169 };
170
171 #if CONFIG_BITPACKED_DEMUXER
172 const AVInputFormat ff_bitpacked_demuxer = {
173 .name = "bitpacked",
174 .long_name = NULL_IF_CONFIG_SMALL("Bitpacked"),
175 .priv_data_size = sizeof(RawVideoDemuxerContext),
176 .read_header = rawvideo_read_header,
177 .read_packet = rawvideo_read_packet,
178 .flags = AVFMT_GENERIC_INDEX,
179 .extensions = "bitpacked",
180 .raw_codec_id = AV_CODEC_ID_BITPACKED,
181 .priv_class = &bitpacked_demuxer_class,
182 };
183 #endif // CONFIG_BITPACKED_DEMUXER
184
185 static const AVClass v210_demuxer_class = {
186 .class_name = "v210(x) demuxer",
187 .item_name = av_default_item_name,
188 .option = rawvideo_options + 1,
189 .version = LIBAVUTIL_VERSION_INT,
190 };
191
192 #if CONFIG_V210_DEMUXER
193 const AVInputFormat ff_v210_demuxer = {
194 .name = "v210",
195 .long_name = NULL_IF_CONFIG_SMALL("Uncompressed 4:2:2 10-bit"),
196 .priv_data_size = sizeof(RawVideoDemuxerContext),
197 .read_header = rawvideo_read_header,
198 .read_packet = rawvideo_read_packet,
199 .flags = AVFMT_GENERIC_INDEX,
200 .extensions = "v210",
201 .raw_codec_id = AV_CODEC_ID_V210,
202 .priv_class = &v210_demuxer_class,
203 };
204 #endif // CONFIG_V210_DEMUXER
205
206 #if CONFIG_V210X_DEMUXER
207 const AVInputFormat ff_v210x_demuxer = {
208 .name = "v210x",
209 .long_name = NULL_IF_CONFIG_SMALL("Uncompressed 4:2:2 10-bit"),
210 .priv_data_size = sizeof(RawVideoDemuxerContext),
211 .read_header = rawvideo_read_header,
212 .read_packet = rawvideo_read_packet,
213 .flags = AVFMT_GENERIC_INDEX,
214 .extensions = "yuv10",
215 .raw_codec_id = AV_CODEC_ID_V210X,
216 .priv_class = &v210_demuxer_class,
217 };
218 #endif // CONFIG_V210X_DEMUXER
219