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