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
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
|
/*
* 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 "codec_internal.h"
#include "v210dec.h"
#include "v210dec_init.h"
#include "libavutil/bswap.h"
#include "libavutil/imgutils.h"
#include "libavutil/internal.h"
#include "libavutil/intreadwrite.h"
#include "thread.h"
typedef struct ThreadData {
AVFrame *frame;
uint8_t *buf;
int stride;
} ThreadData;
static av_cold int decode_init(AVCodecContext *avctx)
{
V210DecContext *s = avctx->priv_data;
avctx->pix_fmt = AV_PIX_FMT_YUV422P10;
avctx->bits_per_raw_sample = 10;
s->thread_count = av_clip(avctx->thread_count, 1, avctx->height/4);
s->aligned_input = 0;
ff_v210dec_init(s);
return 0;
}
static void decode_row(const uint32_t *src, uint16_t *y, uint16_t *u, uint16_t *v, const int width,
void (*unpack_frame)(const uint32_t *src, uint16_t *y, uint16_t *u, uint16_t *v, int width))
{
uint32_t val;
int w = (FFMAX(0, width - 12) / 12) * 12;
unpack_frame(src, y, u, v, w);
y += w;
u += w >> 1;
v += w >> 1;
src += (w << 1) / 3;
while (w < width - 5) {
READ_PIXELS(u, y, v);
READ_PIXELS(y, u, y);
READ_PIXELS(v, y, u);
READ_PIXELS(y, v, y);
w += 6;
}
if (w++ < width) {
READ_PIXELS(u, y, v);
if (w++ < width) {
val = av_le2ne32(*src++);
*y++ = val & 0x3FF;
if (w++ < width) {
*u++ = (val >> 10) & 0x3FF;
*y++ = (val >> 20) & 0x3FF;
val = av_le2ne32(*src++);
*v++ = val & 0x3FF;
if (w++ < width) {
*y++ = (val >> 10) & 0x3FF;
if (w++ < width) {
*u++ = (val >> 20) & 0x3FF;
val = av_le2ne32(*src++);
*y++ = val & 0x3FF;
*v++ = (val >> 10) & 0x3FF;
if (w++ < width)
*y++ = (val >> 20) & 0x3FF;
}
}
}
}
}
}
static int v210_decode_slice(AVCodecContext *avctx, void *arg, int jobnr, int threadnr)
{
V210DecContext *s = avctx->priv_data;
ThreadData *td = arg;
AVFrame *frame = td->frame;
int stride = td->stride;
int slice_start = (avctx->height * jobnr) / s->thread_count;
int slice_end = (avctx->height * (jobnr+1)) / s->thread_count;
uint8_t *psrc = td->buf + stride * slice_start;
int16_t *py = (uint16_t*)frame->data[0] + slice_start * frame->linesize[0] / 2;
int16_t *pu = (uint16_t*)frame->data[1] + slice_start * frame->linesize[1] / 2;
int16_t *pv = (uint16_t*)frame->data[2] + slice_start * frame->linesize[2] / 2;
for (int h = slice_start; h < slice_end; h++) {
decode_row((const uint32_t *)psrc, py, pu, pv, avctx->width, s->unpack_frame);
psrc += stride;
py += frame->linesize[0] / 2;
pu += frame->linesize[1] / 2;
pv += frame->linesize[2] / 2;
}
return 0;
}
static int v210_stride(int width, int align) {
int aligned_width = ((width + align - 1) / align) * align;
return aligned_width * 8 / 3;
}
static int decode_frame(AVCodecContext *avctx, AVFrame *pic,
int *got_frame, AVPacket *avpkt)
{
V210DecContext *s = avctx->priv_data;
ThreadData td;
int ret, stride, aligned_input;
const uint8_t *psrc = avpkt->data;
if (s->custom_stride )
stride = s->custom_stride > 0 ? s->custom_stride : 0;
else {
stride = v210_stride(avctx->width, 48);
if (avpkt->size < stride * avctx->height) {
int align;
for (align = 24; align >= 6; align >>= 1) {
int small_stride = v210_stride(avctx->width, align);
if (avpkt->size == small_stride * avctx->height) {
stride = small_stride;
if (!s->stride_warning_shown)
av_log(avctx, AV_LOG_WARNING, "Broken v210 with too small padding (%d byte) detected\n", align * 8 / 3);
s->stride_warning_shown = 1;
break;
}
}
if (align < 6 && avctx->codec_tag == MKTAG('b', 'x', 'y', '2'))
stride = 0;
}
}
if (stride == 0 && ((avctx->width & 1) || (int64_t)avctx->width * avctx->height > INT_MAX / 6)) {
av_log(avctx, AV_LOG_ERROR, "Strideless v210 is not supported for size %dx%d\n", avctx->width, avctx->height);
return AVERROR_INVALIDDATA;
}
if (stride > 0 && avpkt->size < (int64_t)stride * avctx->height ||
stride == 0 && avpkt->size < v210_stride(avctx->width * avctx->height, 6)) {
av_log(avctx, AV_LOG_ERROR, "packet too small\n");
return AVERROR_INVALIDDATA;
}
if ( avctx->codec_tag == MKTAG('C', '2', '1', '0')
&& avpkt->size > 64
&& AV_RN32(psrc) == AV_RN32("INFO")
&& avpkt->size - 64 >= stride * avctx->height)
psrc += 64;
aligned_input = !((uintptr_t)psrc & 0x1f) && !(stride & 0x1f);
if (aligned_input != s->aligned_input) {
s->aligned_input = aligned_input;
ff_v210dec_init(s);
}
if ((ret = ff_thread_get_buffer(avctx, pic, 0)) < 0)
return ret;
pic->pict_type = AV_PICTURE_TYPE_I;
pic->key_frame = 1;
if (stride) {
td.stride = stride;
td.buf = (uint8_t*)psrc;
td.frame = pic;
avctx->execute2(avctx, v210_decode_slice, &td, NULL, s->thread_count);
} else {
uint8_t *pointers[4];
int linesizes[4];
int ret = av_image_alloc(pointers, linesizes, avctx->width, avctx->height, avctx->pix_fmt, 1);
if (ret < 0)
return ret;
decode_row((const uint32_t *)psrc, (uint16_t *)pointers[0], (uint16_t *)pointers[1], (uint16_t *)pointers[2], avctx->width * avctx->height, s->unpack_frame);
av_image_copy(pic->data, pic->linesize, (const uint8_t **)pointers, linesizes, avctx->pix_fmt, avctx->width, avctx->height);
av_freep(&pointers[0]);
}
if (avctx->field_order > AV_FIELD_PROGRESSIVE) {
/* we have interlaced material flagged in container */
pic->interlaced_frame = 1;
if (avctx->field_order == AV_FIELD_TT || avctx->field_order == AV_FIELD_TB)
pic->top_field_first = 1;
}
*got_frame = 1;
return avpkt->size;
}
#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), AV_OPT_TYPE_INT,
{.i64 = 0}, -1, INT_MAX, V210DEC_FLAGS},
{NULL}
};
static const AVClass v210dec_class = {
.class_name = "V210 Decoder",
.item_name = av_default_item_name,
.option = v210dec_options,
.version = LIBAVUTIL_VERSION_INT,
};
const FFCodec ff_v210_decoder = {
.p.name = "v210",
.p.long_name = NULL_IF_CONFIG_SMALL("Uncompressed 4:2:2 10-bit"),
.p.type = AVMEDIA_TYPE_VIDEO,
.p.id = AV_CODEC_ID_V210,
.priv_data_size = sizeof(V210DecContext),
.init = decode_init,
FF_CODEC_DECODE_CB(decode_frame),
.p.capabilities = AV_CODEC_CAP_DR1 |
AV_CODEC_CAP_SLICE_THREADS |
AV_CODEC_CAP_FRAME_THREADS,
.p.priv_class = &v210dec_class,
.caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,
};
|
