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
|
/*
* V210 decoder
*
* Copyright (C) 2009 Michael Niedermayer <michaelni@gmx.at>
* Copyright (c) 2009 Baptiste Coudurier <baptiste dot coudurier at gmail dot com>
*
* 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 "avcodec.h"
#include "v210dec.h"
#include "libavutil/bswap.h"
#define READ_PIXELS(a, b, c) \
do { \
val = av_le2ne32(*src++); \
*a++ = val & 0x3FF; \
*b++ = (val >> 10) & 0x3FF; \
*c++ = (val >> 20) & 0x3FF; \
} while (0)
static void v210_planar_unpack_c(const uint32_t *src, uint16_t *y, uint16_t *u, uint16_t *v, int width)
{
uint32_t val;
int i;
for( i = 0; i < width-5; i += 6 ){
READ_PIXELS(u, y, v);
READ_PIXELS(y, u, y);
READ_PIXELS(v, y, u);
READ_PIXELS(y, v, y);
}
}
static av_cold int decode_init(AVCodecContext *avctx)
{
V210DecContext *s = avctx->priv_data;
if (avctx->width & 1) {
av_log(avctx, AV_LOG_ERROR, "v210 needs even width\n");
return -1;
}
avctx->pix_fmt = PIX_FMT_YUV422P10;
avctx->bits_per_raw_sample = 10;
avctx->coded_frame = avcodec_alloc_frame();
if (!avctx->coded_frame)
return AVERROR(ENOMEM);
s->unpack_frame = v210_planar_unpack_c;
if (HAVE_MMX)
v210_x86_init(s);
return 0;
}
static int decode_frame(AVCodecContext *avctx, void *data, int *data_size,
AVPacket *avpkt)
{
V210DecContext *s = avctx->priv_data;
int h, w, stride, aligned_input;
AVFrame *pic = avctx->coded_frame;
const uint8_t *psrc = avpkt->data;
uint16_t *y, *u, *v;
if (s->custom_stride )
stride = s->custom_stride;
else {
int aligned_width = ((avctx->width + 47) / 48) * 48;
stride = aligned_width * 8 / 3;
}
if (avpkt->size < stride * avctx->height) {
if ((((avctx->width + 23) / 24) * 24 * 8) / 3 * avctx->height == avpkt->size) {
stride = avpkt->size / avctx->height;
if (!s->stride_warning_shown)
av_log(avctx, AV_LOG_WARNING, "Broken v210 with too small padding (64 byte) detected\n");
s->stride_warning_shown = 1;
} else {
av_log(avctx, AV_LOG_ERROR, "packet too small\n");
return -1;
}
}
aligned_input = !((uintptr_t)psrc & 0xf) && !(stride & 0xf);
if (aligned_input != s->aligned_input) {
s->aligned_input = aligned_input;
if (HAVE_MMX)
v210_x86_init(s);
}
if (pic->data[0])
avctx->release_buffer(avctx, pic);
pic->reference = 0;
if (avctx->get_buffer(avctx, pic) < 0)
return -1;
y = (uint16_t*)pic->data[0];
u = (uint16_t*)pic->data[1];
v = (uint16_t*)pic->data[2];
pic->pict_type = AV_PICTURE_TYPE_I;
pic->key_frame = 1;
for (h = 0; h < avctx->height; h++) {
const uint32_t *src = (const uint32_t*)psrc;
uint32_t val;
w = (avctx->width / 6) * 6;
s->unpack_frame(src, y, u, v, w);
y += w;
u += w >> 1;
v += w >> 1;
src += (w << 1) / 3;
if (w < avctx->width - 1) {
READ_PIXELS(u, y, v);
val = av_le2ne32(*src++);
*y++ = val & 0x3FF;
if (w < avctx->width - 3) {
*u++ = (val >> 10) & 0x3FF;
*y++ = (val >> 20) & 0x3FF;
val = av_le2ne32(*src++);
*v++ = val & 0x3FF;
*y++ = (val >> 10) & 0x3FF;
}
}
psrc += stride;
y += pic->linesize[0] / 2 - avctx->width;
u += pic->linesize[1] / 2 - avctx->width / 2;
v += pic->linesize[2] / 2 - avctx->width / 2;
}
*data_size = sizeof(AVFrame);
*(AVFrame*)data = *avctx->coded_frame;
return avpkt->size;
}
static av_cold int decode_close(AVCodecContext *avctx)
{
AVFrame *pic = avctx->coded_frame;
if (pic->data[0])
avctx->release_buffer(avctx, pic);
av_freep(&avctx->coded_frame);
return 0;
}
#define V210DEC_FLAGS AV_OPT_FLAG_DECODING_PARAM | AV_OPT_FLAG_VIDEO_PARAM
static const AVOption v210dec_options[] = {
{"custom_stride", "Custom V210 stride", offsetof(V210DecContext, custom_stride), FF_OPT_TYPE_INT,
{.dbl = 0}, INT_MIN, INT_MAX, V210DEC_FLAGS},
{NULL}
};
static const AVClass v210dec_class = {
"V210 Decoder",
av_default_item_name,
v210dec_options,
LIBAVUTIL_VERSION_INT,
};
AVCodec ff_v210_decoder = {
.name = "v210",
.type = AVMEDIA_TYPE_VIDEO,
.id = CODEC_ID_V210,
.priv_data_size = sizeof(V210DecContext),
.init = decode_init,
.close = decode_close,
.decode = decode_frame,
.capabilities = CODEC_CAP_DR1,
.long_name = NULL_IF_CONFIG_SMALL("Uncompressed 4:2:2 10-bit"),
.priv_class = &v210dec_class,
};
|
