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/* |
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* V4L2 buffer helper functions. |
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* |
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* Copyright (C) 2017 Alexis Ballier <aballier@gentoo.org> |
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* Copyright (C) 2017 Jorge Ramirez <jorge.ramirez-ortiz@linaro.org> |
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* |
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* This file is part of FFmpeg. |
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* |
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* FFmpeg is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* FFmpeg is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
17 |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with FFmpeg; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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#include <linux/videodev2.h> |
25 |
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#include <sys/ioctl.h> |
26 |
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#include <sys/mman.h> |
27 |
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#include <unistd.h> |
28 |
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#include <fcntl.h> |
29 |
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#include <poll.h> |
30 |
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#include "libavcodec/avcodec.h" |
31 |
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#include "libavutil/pixdesc.h" |
32 |
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#include "libavutil/refstruct.h" |
33 |
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#include "v4l2_context.h" |
34 |
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#include "v4l2_buffers.h" |
35 |
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#include "v4l2_m2m.h" |
36 |
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37 |
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#ifndef USEC_PER_SEC |
38 |
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#define USEC_PER_SEC 1000000 |
39 |
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#endif |
40 |
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41 |
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static AVRational v4l2_timebase = { 1, USEC_PER_SEC }; |
42 |
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43 |
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✗ |
static inline V4L2m2mContext *buf_to_m2mctx(V4L2Buffer *buf) |
44 |
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{ |
45 |
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return V4L2_TYPE_IS_OUTPUT(buf->context->type) ? |
46 |
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container_of(buf->context, V4L2m2mContext, output) : |
47 |
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container_of(buf->context, V4L2m2mContext, capture); |
48 |
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} |
49 |
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50 |
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static inline AVCodecContext *logger(V4L2Buffer *buf) |
51 |
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{ |
52 |
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return buf_to_m2mctx(buf)->avctx; |
53 |
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} |
54 |
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55 |
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static inline AVRational v4l2_get_timebase(V4L2Buffer *avbuf) |
56 |
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{ |
57 |
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✗ |
V4L2m2mContext *s = buf_to_m2mctx(avbuf); |
58 |
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59 |
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✗ |
if (s->avctx->pkt_timebase.num) |
60 |
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return s->avctx->pkt_timebase; |
61 |
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return s->avctx->time_base; |
62 |
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} |
63 |
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64 |
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✗ |
static inline void v4l2_set_pts(V4L2Buffer *out, int64_t pts) |
65 |
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{ |
66 |
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int64_t v4l2_pts; |
67 |
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68 |
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✗ |
if (pts == AV_NOPTS_VALUE) |
69 |
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pts = 0; |
70 |
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71 |
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/* convert pts to v4l2 timebase */ |
72 |
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v4l2_pts = av_rescale_q(pts, v4l2_get_timebase(out), v4l2_timebase); |
73 |
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out->buf.timestamp.tv_usec = v4l2_pts % USEC_PER_SEC; |
74 |
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out->buf.timestamp.tv_sec = v4l2_pts / USEC_PER_SEC; |
75 |
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✗ |
} |
76 |
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77 |
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static inline int64_t v4l2_get_pts(V4L2Buffer *avbuf) |
78 |
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{ |
79 |
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int64_t v4l2_pts; |
80 |
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81 |
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/* convert pts back to encoder timebase */ |
82 |
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v4l2_pts = (int64_t)avbuf->buf.timestamp.tv_sec * USEC_PER_SEC + |
83 |
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✗ |
avbuf->buf.timestamp.tv_usec; |
84 |
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|
85 |
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✗ |
return av_rescale_q(v4l2_pts, v4l2_timebase, v4l2_get_timebase(avbuf)); |
86 |
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} |
87 |
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88 |
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static enum AVColorPrimaries v4l2_get_color_primaries(V4L2Buffer *buf) |
89 |
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{ |
90 |
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enum v4l2_ycbcr_encoding ycbcr; |
91 |
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enum v4l2_colorspace cs; |
92 |
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|
93 |
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✗ |
cs = V4L2_TYPE_IS_MULTIPLANAR(buf->buf.type) ? |
94 |
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buf->context->format.fmt.pix_mp.colorspace : |
95 |
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buf->context->format.fmt.pix.colorspace; |
96 |
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|
97 |
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ycbcr = V4L2_TYPE_IS_MULTIPLANAR(buf->buf.type) ? |
98 |
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✗ |
buf->context->format.fmt.pix_mp.ycbcr_enc: |
99 |
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✗ |
buf->context->format.fmt.pix.ycbcr_enc; |
100 |
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101 |
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✗ |
switch(ycbcr) { |
102 |
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✗ |
case V4L2_YCBCR_ENC_XV709: |
103 |
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case V4L2_YCBCR_ENC_709: return AVCOL_PRI_BT709; |
104 |
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✗ |
case V4L2_YCBCR_ENC_XV601: |
105 |
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case V4L2_YCBCR_ENC_601:return AVCOL_PRI_BT470M; |
106 |
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✗ |
default: |
107 |
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✗ |
break; |
108 |
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} |
109 |
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110 |
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✗ |
switch(cs) { |
111 |
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case V4L2_COLORSPACE_470_SYSTEM_BG: return AVCOL_PRI_BT470BG; |
112 |
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✗ |
case V4L2_COLORSPACE_SMPTE170M: return AVCOL_PRI_SMPTE170M; |
113 |
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✗ |
case V4L2_COLORSPACE_SMPTE240M: return AVCOL_PRI_SMPTE240M; |
114 |
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case V4L2_COLORSPACE_BT2020: return AVCOL_PRI_BT2020; |
115 |
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✗ |
default: |
116 |
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✗ |
break; |
117 |
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} |
118 |
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119 |
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✗ |
return AVCOL_PRI_UNSPECIFIED; |
120 |
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} |
121 |
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122 |
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✗ |
static enum AVColorRange v4l2_get_color_range(V4L2Buffer *buf) |
123 |
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{ |
124 |
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enum v4l2_quantization qt; |
125 |
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|
126 |
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✗ |
qt = V4L2_TYPE_IS_MULTIPLANAR(buf->buf.type) ? |
127 |
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✗ |
buf->context->format.fmt.pix_mp.quantization : |
128 |
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✗ |
buf->context->format.fmt.pix.quantization; |
129 |
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|
130 |
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✗ |
switch (qt) { |
131 |
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case V4L2_QUANTIZATION_LIM_RANGE: return AVCOL_RANGE_MPEG; |
132 |
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case V4L2_QUANTIZATION_FULL_RANGE: return AVCOL_RANGE_JPEG; |
133 |
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✗ |
default: |
134 |
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break; |
135 |
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} |
136 |
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137 |
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return AVCOL_RANGE_UNSPECIFIED; |
138 |
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} |
139 |
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140 |
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✗ |
static enum AVColorSpace v4l2_get_color_space(V4L2Buffer *buf) |
141 |
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{ |
142 |
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enum v4l2_ycbcr_encoding ycbcr; |
143 |
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enum v4l2_colorspace cs; |
144 |
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145 |
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✗ |
cs = V4L2_TYPE_IS_MULTIPLANAR(buf->buf.type) ? |
146 |
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✗ |
buf->context->format.fmt.pix_mp.colorspace : |
147 |
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✗ |
buf->context->format.fmt.pix.colorspace; |
148 |
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149 |
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ycbcr = V4L2_TYPE_IS_MULTIPLANAR(buf->buf.type) ? |
150 |
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buf->context->format.fmt.pix_mp.ycbcr_enc: |
151 |
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buf->context->format.fmt.pix.ycbcr_enc; |
152 |
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153 |
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✗ |
switch(cs) { |
154 |
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case V4L2_COLORSPACE_SRGB: return AVCOL_SPC_RGB; |
155 |
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case V4L2_COLORSPACE_REC709: return AVCOL_SPC_BT709; |
156 |
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case V4L2_COLORSPACE_470_SYSTEM_M: return AVCOL_SPC_FCC; |
157 |
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case V4L2_COLORSPACE_470_SYSTEM_BG: return AVCOL_SPC_BT470BG; |
158 |
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case V4L2_COLORSPACE_SMPTE170M: return AVCOL_SPC_SMPTE170M; |
159 |
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case V4L2_COLORSPACE_SMPTE240M: return AVCOL_SPC_SMPTE240M; |
160 |
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case V4L2_COLORSPACE_BT2020: |
161 |
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if (ycbcr == V4L2_YCBCR_ENC_BT2020_CONST_LUM) |
162 |
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return AVCOL_SPC_BT2020_CL; |
163 |
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else |
164 |
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return AVCOL_SPC_BT2020_NCL; |
165 |
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default: |
166 |
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break; |
167 |
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} |
168 |
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169 |
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✗ |
return AVCOL_SPC_UNSPECIFIED; |
170 |
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} |
171 |
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172 |
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✗ |
static enum AVColorTransferCharacteristic v4l2_get_color_trc(V4L2Buffer *buf) |
173 |
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{ |
174 |
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enum v4l2_ycbcr_encoding ycbcr; |
175 |
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enum v4l2_xfer_func xfer; |
176 |
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enum v4l2_colorspace cs; |
177 |
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178 |
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✗ |
cs = V4L2_TYPE_IS_MULTIPLANAR(buf->buf.type) ? |
179 |
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buf->context->format.fmt.pix_mp.colorspace : |
180 |
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buf->context->format.fmt.pix.colorspace; |
181 |
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|
182 |
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ycbcr = V4L2_TYPE_IS_MULTIPLANAR(buf->buf.type) ? |
183 |
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buf->context->format.fmt.pix_mp.ycbcr_enc: |
184 |
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buf->context->format.fmt.pix.ycbcr_enc; |
185 |
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|
186 |
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xfer = V4L2_TYPE_IS_MULTIPLANAR(buf->buf.type) ? |
187 |
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✗ |
buf->context->format.fmt.pix_mp.xfer_func: |
188 |
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buf->context->format.fmt.pix.xfer_func; |
189 |
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|
190 |
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✗ |
switch (xfer) { |
191 |
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case V4L2_XFER_FUNC_709: return AVCOL_TRC_BT709; |
192 |
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✗ |
case V4L2_XFER_FUNC_SRGB: return AVCOL_TRC_IEC61966_2_1; |
193 |
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✗ |
default: |
194 |
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✗ |
break; |
195 |
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} |
196 |
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|
197 |
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✗ |
switch (cs) { |
198 |
|
✗ |
case V4L2_COLORSPACE_470_SYSTEM_M: return AVCOL_TRC_GAMMA22; |
199 |
|
✗ |
case V4L2_COLORSPACE_470_SYSTEM_BG: return AVCOL_TRC_GAMMA28; |
200 |
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✗ |
case V4L2_COLORSPACE_SMPTE170M: return AVCOL_TRC_SMPTE170M; |
201 |
|
✗ |
case V4L2_COLORSPACE_SMPTE240M: return AVCOL_TRC_SMPTE240M; |
202 |
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✗ |
default: |
203 |
|
✗ |
break; |
204 |
|
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} |
205 |
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|
206 |
|
✗ |
switch (ycbcr) { |
207 |
|
✗ |
case V4L2_YCBCR_ENC_XV709: |
208 |
|
✗ |
case V4L2_YCBCR_ENC_XV601: return AVCOL_TRC_BT1361_ECG; |
209 |
|
✗ |
default: |
210 |
|
✗ |
break; |
211 |
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} |
212 |
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|
213 |
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✗ |
return AVCOL_TRC_UNSPECIFIED; |
214 |
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} |
215 |
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|
216 |
|
✗ |
static void v4l2_get_interlacing(AVFrame *frame, V4L2Buffer *buf) |
217 |
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{ |
218 |
|
✗ |
enum v4l2_field field = V4L2_TYPE_IS_MULTIPLANAR(buf->buf.type) ? |
219 |
|
✗ |
buf->context->format.fmt.pix_mp.field : |
220 |
|
✗ |
buf->context->format.fmt.pix.field; |
221 |
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|
222 |
|
✗ |
switch (field) { |
223 |
|
✗ |
case V4L2_FIELD_INTERLACED: |
224 |
|
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case V4L2_FIELD_INTERLACED_TB: |
225 |
|
✗ |
frame->flags |= AV_FRAME_FLAG_TOP_FIELD_FIRST; |
226 |
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/* fallthrough */ |
227 |
|
✗ |
case V4L2_FIELD_INTERLACED_BT: |
228 |
|
✗ |
frame->flags |= AV_FRAME_FLAG_INTERLACED; |
229 |
|
✗ |
break; |
230 |
|
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} |
231 |
|
✗ |
} |
232 |
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|
233 |
|
✗ |
static void v4l2_free_buffer(void *opaque, uint8_t *unused) |
234 |
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{ |
235 |
|
✗ |
V4L2Buffer* avbuf = opaque; |
236 |
|
✗ |
V4L2m2mContext *s = buf_to_m2mctx(avbuf); |
237 |
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|
238 |
|
✗ |
if (atomic_fetch_sub(&avbuf->context_refcount, 1) == 1) { |
239 |
|
✗ |
atomic_fetch_sub_explicit(&s->refcount, 1, memory_order_acq_rel); |
240 |
|
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|
241 |
|
✗ |
if (s->reinit) { |
242 |
|
✗ |
if (!atomic_load(&s->refcount)) |
243 |
|
✗ |
sem_post(&s->refsync); |
244 |
|
|
} else { |
245 |
|
✗ |
if (s->draining && V4L2_TYPE_IS_OUTPUT(avbuf->context->type)) { |
246 |
|
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/* no need to queue more buffers to the driver */ |
247 |
|
✗ |
avbuf->status = V4L2BUF_AVAILABLE; |
248 |
|
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} |
249 |
|
✗ |
else if (avbuf->context->streamon) |
250 |
|
✗ |
ff_v4l2_buffer_enqueue(avbuf); |
251 |
|
|
} |
252 |
|
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|
253 |
|
✗ |
av_refstruct_unref(&avbuf->context_ref); |
254 |
|
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} |
255 |
|
✗ |
} |
256 |
|
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|
257 |
|
✗ |
static int v4l2_buf_increase_ref(V4L2Buffer *in) |
258 |
|
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{ |
259 |
|
✗ |
V4L2m2mContext *s = buf_to_m2mctx(in); |
260 |
|
|
|
261 |
|
✗ |
if (in->context_ref) |
262 |
|
✗ |
atomic_fetch_add(&in->context_refcount, 1); |
263 |
|
|
else { |
264 |
|
✗ |
in->context_ref = av_refstruct_ref(s->self_ref); |
265 |
|
|
|
266 |
|
✗ |
in->context_refcount = 1; |
267 |
|
|
} |
268 |
|
|
|
269 |
|
✗ |
in->status = V4L2BUF_RET_USER; |
270 |
|
✗ |
atomic_fetch_add_explicit(&s->refcount, 1, memory_order_relaxed); |
271 |
|
|
|
272 |
|
✗ |
return 0; |
273 |
|
|
} |
274 |
|
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|
275 |
|
✗ |
static int v4l2_buf_to_bufref(V4L2Buffer *in, int plane, AVBufferRef **buf) |
276 |
|
|
{ |
277 |
|
|
int ret; |
278 |
|
|
|
279 |
|
✗ |
if (plane >= in->num_planes) |
280 |
|
✗ |
return AVERROR(EINVAL); |
281 |
|
|
|
282 |
|
|
/* even though most encoders return 0 in data_offset encoding vp8 does require this value */ |
283 |
|
✗ |
*buf = av_buffer_create((char *)in->plane_info[plane].mm_addr + in->planes[plane].data_offset, |
284 |
|
|
in->plane_info[plane].length, v4l2_free_buffer, in, 0); |
285 |
|
✗ |
if (!*buf) |
286 |
|
✗ |
return AVERROR(ENOMEM); |
287 |
|
|
|
288 |
|
✗ |
ret = v4l2_buf_increase_ref(in); |
289 |
|
✗ |
if (ret) |
290 |
|
✗ |
av_buffer_unref(buf); |
291 |
|
|
|
292 |
|
✗ |
return ret; |
293 |
|
|
} |
294 |
|
|
|
295 |
|
✗ |
static int v4l2_bufref_to_buf(V4L2Buffer *out, int plane, const uint8_t* data, int size, int offset) |
296 |
|
|
{ |
297 |
|
|
unsigned int bytesused, length; |
298 |
|
|
|
299 |
|
✗ |
if (plane >= out->num_planes) |
300 |
|
✗ |
return AVERROR(EINVAL); |
301 |
|
|
|
302 |
|
✗ |
length = out->plane_info[plane].length; |
303 |
|
✗ |
bytesused = FFMIN(size+offset, length); |
304 |
|
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|
305 |
|
✗ |
memcpy((uint8_t*)out->plane_info[plane].mm_addr+offset, data, FFMIN(size, length-offset)); |
306 |
|
|
|
307 |
|
✗ |
if (V4L2_TYPE_IS_MULTIPLANAR(out->buf.type)) { |
308 |
|
✗ |
out->planes[plane].bytesused = bytesused; |
309 |
|
✗ |
out->planes[plane].length = length; |
310 |
|
|
} else { |
311 |
|
✗ |
out->buf.bytesused = bytesused; |
312 |
|
✗ |
out->buf.length = length; |
313 |
|
|
} |
314 |
|
|
|
315 |
|
✗ |
return 0; |
316 |
|
|
} |
317 |
|
|
|
318 |
|
✗ |
static int v4l2_buffer_buf_to_swframe(AVFrame *frame, V4L2Buffer *avbuf) |
319 |
|
|
{ |
320 |
|
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int i, ret; |
321 |
|
|
|
322 |
|
✗ |
frame->format = avbuf->context->av_pix_fmt; |
323 |
|
|
|
324 |
|
✗ |
for (i = 0; i < avbuf->num_planes; i++) { |
325 |
|
✗ |
ret = v4l2_buf_to_bufref(avbuf, i, &frame->buf[i]); |
326 |
|
✗ |
if (ret) |
327 |
|
✗ |
return ret; |
328 |
|
|
|
329 |
|
✗ |
frame->linesize[i] = avbuf->plane_info[i].bytesperline; |
330 |
|
✗ |
frame->data[i] = frame->buf[i]->data; |
331 |
|
|
} |
332 |
|
|
|
333 |
|
|
/* fixup special cases */ |
334 |
|
✗ |
switch (avbuf->context->av_pix_fmt) { |
335 |
|
✗ |
case AV_PIX_FMT_NV12: |
336 |
|
|
case AV_PIX_FMT_NV21: |
337 |
|
✗ |
if (avbuf->num_planes > 1) |
338 |
|
✗ |
break; |
339 |
|
✗ |
frame->linesize[1] = avbuf->plane_info[0].bytesperline; |
340 |
|
✗ |
frame->data[1] = frame->buf[0]->data + avbuf->plane_info[0].bytesperline * avbuf->context->format.fmt.pix_mp.height; |
341 |
|
✗ |
break; |
342 |
|
|
|
343 |
|
✗ |
case AV_PIX_FMT_YUV420P: |
344 |
|
✗ |
if (avbuf->num_planes > 1) |
345 |
|
✗ |
break; |
346 |
|
✗ |
frame->linesize[1] = avbuf->plane_info[0].bytesperline >> 1; |
347 |
|
✗ |
frame->linesize[2] = avbuf->plane_info[0].bytesperline >> 1; |
348 |
|
✗ |
frame->data[1] = frame->buf[0]->data + avbuf->plane_info[0].bytesperline * avbuf->context->format.fmt.pix_mp.height; |
349 |
|
✗ |
frame->data[2] = frame->data[1] + ((avbuf->plane_info[0].bytesperline * avbuf->context->format.fmt.pix_mp.height) >> 2); |
350 |
|
✗ |
break; |
351 |
|
|
|
352 |
|
✗ |
default: |
353 |
|
✗ |
break; |
354 |
|
|
} |
355 |
|
|
|
356 |
|
✗ |
return 0; |
357 |
|
|
} |
358 |
|
|
|
359 |
|
✗ |
static int v4l2_buffer_swframe_to_buf(const AVFrame *frame, V4L2Buffer *out) |
360 |
|
|
{ |
361 |
|
|
int i, ret; |
362 |
|
✗ |
struct v4l2_format fmt = out->context->format; |
363 |
|
✗ |
int pixel_format = V4L2_TYPE_IS_MULTIPLANAR(fmt.type) ? |
364 |
|
✗ |
fmt.fmt.pix_mp.pixelformat : fmt.fmt.pix.pixelformat; |
365 |
|
✗ |
int height = V4L2_TYPE_IS_MULTIPLANAR(fmt.type) ? |
366 |
|
✗ |
fmt.fmt.pix_mp.height : fmt.fmt.pix.height; |
367 |
|
✗ |
int is_planar_format = 0; |
368 |
|
|
|
369 |
|
✗ |
switch (pixel_format) { |
370 |
|
✗ |
case V4L2_PIX_FMT_YUV420M: |
371 |
|
|
case V4L2_PIX_FMT_YVU420M: |
372 |
|
|
#ifdef V4L2_PIX_FMT_YUV422M |
373 |
|
|
case V4L2_PIX_FMT_YUV422M: |
374 |
|
|
#endif |
375 |
|
|
#ifdef V4L2_PIX_FMT_YVU422M |
376 |
|
|
case V4L2_PIX_FMT_YVU422M: |
377 |
|
|
#endif |
378 |
|
|
#ifdef V4L2_PIX_FMT_YUV444M |
379 |
|
|
case V4L2_PIX_FMT_YUV444M: |
380 |
|
|
#endif |
381 |
|
|
#ifdef V4L2_PIX_FMT_YVU444M |
382 |
|
|
case V4L2_PIX_FMT_YVU444M: |
383 |
|
|
#endif |
384 |
|
|
case V4L2_PIX_FMT_NV12M: |
385 |
|
|
case V4L2_PIX_FMT_NV21M: |
386 |
|
|
case V4L2_PIX_FMT_NV12MT_16X16: |
387 |
|
|
case V4L2_PIX_FMT_NV12MT: |
388 |
|
|
case V4L2_PIX_FMT_NV16M: |
389 |
|
|
case V4L2_PIX_FMT_NV61M: |
390 |
|
✗ |
is_planar_format = 1; |
391 |
|
|
} |
392 |
|
|
|
393 |
|
✗ |
if (!is_planar_format) { |
394 |
|
✗ |
const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(frame->format); |
395 |
|
✗ |
int planes_nb = 0; |
396 |
|
✗ |
int offset = 0; |
397 |
|
|
|
398 |
|
✗ |
for (i = 0; i < desc->nb_components; i++) |
399 |
|
✗ |
planes_nb = FFMAX(planes_nb, desc->comp[i].plane + 1); |
400 |
|
|
|
401 |
|
✗ |
for (i = 0; i < planes_nb; i++) { |
402 |
|
✗ |
int size, h = height; |
403 |
|
✗ |
if (i == 1 || i == 2) { |
404 |
|
✗ |
h = AV_CEIL_RSHIFT(h, desc->log2_chroma_h); |
405 |
|
|
} |
406 |
|
✗ |
size = frame->linesize[i] * h; |
407 |
|
✗ |
ret = v4l2_bufref_to_buf(out, 0, frame->data[i], size, offset); |
408 |
|
✗ |
if (ret) |
409 |
|
✗ |
return ret; |
410 |
|
✗ |
offset += size; |
411 |
|
|
} |
412 |
|
✗ |
return 0; |
413 |
|
|
} |
414 |
|
|
|
415 |
|
✗ |
for (i = 0; i < out->num_planes; i++) { |
416 |
|
✗ |
ret = v4l2_bufref_to_buf(out, i, frame->buf[i]->data, frame->buf[i]->size, 0); |
417 |
|
✗ |
if (ret) |
418 |
|
✗ |
return ret; |
419 |
|
|
} |
420 |
|
|
|
421 |
|
✗ |
return 0; |
422 |
|
|
} |
423 |
|
|
|
424 |
|
|
/****************************************************************************** |
425 |
|
|
* |
426 |
|
|
* V4L2Buffer interface |
427 |
|
|
* |
428 |
|
|
******************************************************************************/ |
429 |
|
|
|
430 |
|
✗ |
int ff_v4l2_buffer_avframe_to_buf(const AVFrame *frame, V4L2Buffer *out) |
431 |
|
|
{ |
432 |
|
✗ |
v4l2_set_pts(out, frame->pts); |
433 |
|
|
|
434 |
|
✗ |
return v4l2_buffer_swframe_to_buf(frame, out); |
435 |
|
|
} |
436 |
|
|
|
437 |
|
✗ |
int ff_v4l2_buffer_buf_to_avframe(AVFrame *frame, V4L2Buffer *avbuf) |
438 |
|
|
{ |
439 |
|
|
int ret; |
440 |
|
|
|
441 |
|
✗ |
av_frame_unref(frame); |
442 |
|
|
|
443 |
|
|
/* 1. get references to the actual data */ |
444 |
|
✗ |
ret = v4l2_buffer_buf_to_swframe(frame, avbuf); |
445 |
|
✗ |
if (ret) |
446 |
|
✗ |
return ret; |
447 |
|
|
|
448 |
|
|
/* 2. get frame information */ |
449 |
|
✗ |
if (avbuf->buf.flags & V4L2_BUF_FLAG_KEYFRAME) |
450 |
|
✗ |
frame->flags |= AV_FRAME_FLAG_KEY; |
451 |
|
✗ |
frame->color_primaries = v4l2_get_color_primaries(avbuf); |
452 |
|
✗ |
frame->colorspace = v4l2_get_color_space(avbuf); |
453 |
|
✗ |
frame->color_range = v4l2_get_color_range(avbuf); |
454 |
|
✗ |
frame->color_trc = v4l2_get_color_trc(avbuf); |
455 |
|
✗ |
frame->pts = v4l2_get_pts(avbuf); |
456 |
|
✗ |
frame->pkt_dts = AV_NOPTS_VALUE; |
457 |
|
✗ |
v4l2_get_interlacing(frame, avbuf); |
458 |
|
|
|
459 |
|
|
/* these values are updated also during re-init in v4l2_process_driver_event */ |
460 |
|
✗ |
frame->height = avbuf->context->height; |
461 |
|
✗ |
frame->width = avbuf->context->width; |
462 |
|
✗ |
frame->sample_aspect_ratio = avbuf->context->sample_aspect_ratio; |
463 |
|
|
|
464 |
|
|
/* 3. report errors upstream */ |
465 |
|
✗ |
if (avbuf->buf.flags & V4L2_BUF_FLAG_ERROR) { |
466 |
|
✗ |
av_log(logger(avbuf), AV_LOG_ERROR, "%s: driver decode error\n", avbuf->context->name); |
467 |
|
✗ |
frame->decode_error_flags |= FF_DECODE_ERROR_INVALID_BITSTREAM; |
468 |
|
|
} |
469 |
|
|
|
470 |
|
✗ |
return 0; |
471 |
|
|
} |
472 |
|
|
|
473 |
|
✗ |
int ff_v4l2_buffer_buf_to_avpkt(AVPacket *pkt, V4L2Buffer *avbuf) |
474 |
|
|
{ |
475 |
|
|
int ret; |
476 |
|
|
|
477 |
|
✗ |
av_packet_unref(pkt); |
478 |
|
✗ |
ret = v4l2_buf_to_bufref(avbuf, 0, &pkt->buf); |
479 |
|
✗ |
if (ret) |
480 |
|
✗ |
return ret; |
481 |
|
|
|
482 |
|
✗ |
pkt->size = V4L2_TYPE_IS_MULTIPLANAR(avbuf->buf.type) ? avbuf->buf.m.planes[0].bytesused : avbuf->buf.bytesused; |
483 |
|
✗ |
pkt->data = pkt->buf->data; |
484 |
|
|
|
485 |
|
✗ |
if (avbuf->buf.flags & V4L2_BUF_FLAG_KEYFRAME) |
486 |
|
✗ |
pkt->flags |= AV_PKT_FLAG_KEY; |
487 |
|
|
|
488 |
|
✗ |
if (avbuf->buf.flags & V4L2_BUF_FLAG_ERROR) { |
489 |
|
✗ |
av_log(logger(avbuf), AV_LOG_ERROR, "%s driver encode error\n", avbuf->context->name); |
490 |
|
✗ |
pkt->flags |= AV_PKT_FLAG_CORRUPT; |
491 |
|
|
} |
492 |
|
|
|
493 |
|
✗ |
pkt->dts = pkt->pts = v4l2_get_pts(avbuf); |
494 |
|
|
|
495 |
|
✗ |
return 0; |
496 |
|
|
} |
497 |
|
|
|
498 |
|
✗ |
int ff_v4l2_buffer_avpkt_to_buf(const AVPacket *pkt, V4L2Buffer *out) |
499 |
|
|
{ |
500 |
|
|
int ret; |
501 |
|
|
|
502 |
|
✗ |
ret = v4l2_bufref_to_buf(out, 0, pkt->data, pkt->size, 0); |
503 |
|
✗ |
if (ret) |
504 |
|
✗ |
return ret; |
505 |
|
|
|
506 |
|
✗ |
v4l2_set_pts(out, pkt->pts); |
507 |
|
|
|
508 |
|
✗ |
if (pkt->flags & AV_PKT_FLAG_KEY) |
509 |
|
✗ |
out->flags = V4L2_BUF_FLAG_KEYFRAME; |
510 |
|
|
|
511 |
|
✗ |
return 0; |
512 |
|
|
} |
513 |
|
|
|
514 |
|
✗ |
int ff_v4l2_buffer_initialize(V4L2Buffer* avbuf, int index) |
515 |
|
|
{ |
516 |
|
✗ |
V4L2Context *ctx = avbuf->context; |
517 |
|
|
int ret, i; |
518 |
|
|
|
519 |
|
✗ |
avbuf->buf.memory = V4L2_MEMORY_MMAP; |
520 |
|
✗ |
avbuf->buf.type = ctx->type; |
521 |
|
✗ |
avbuf->buf.index = index; |
522 |
|
|
|
523 |
|
✗ |
if (V4L2_TYPE_IS_MULTIPLANAR(ctx->type)) { |
524 |
|
✗ |
avbuf->buf.length = VIDEO_MAX_PLANES; |
525 |
|
✗ |
avbuf->buf.m.planes = avbuf->planes; |
526 |
|
|
} |
527 |
|
|
|
528 |
|
✗ |
ret = ioctl(buf_to_m2mctx(avbuf)->fd, VIDIOC_QUERYBUF, &avbuf->buf); |
529 |
|
✗ |
if (ret < 0) |
530 |
|
✗ |
return AVERROR(errno); |
531 |
|
|
|
532 |
|
✗ |
if (V4L2_TYPE_IS_MULTIPLANAR(ctx->type)) { |
533 |
|
✗ |
avbuf->num_planes = 0; |
534 |
|
|
/* in MP, the V4L2 API states that buf.length means num_planes */ |
535 |
|
✗ |
for (i = 0; i < avbuf->buf.length; i++) { |
536 |
|
✗ |
if (avbuf->buf.m.planes[i].length) |
537 |
|
✗ |
avbuf->num_planes++; |
538 |
|
|
} |
539 |
|
|
} else |
540 |
|
✗ |
avbuf->num_planes = 1; |
541 |
|
|
|
542 |
|
✗ |
for (i = 0; i < avbuf->num_planes; i++) { |
543 |
|
|
|
544 |
|
✗ |
avbuf->plane_info[i].bytesperline = V4L2_TYPE_IS_MULTIPLANAR(ctx->type) ? |
545 |
|
✗ |
ctx->format.fmt.pix_mp.plane_fmt[i].bytesperline : |
546 |
|
✗ |
ctx->format.fmt.pix.bytesperline; |
547 |
|
|
|
548 |
|
✗ |
if (V4L2_TYPE_IS_MULTIPLANAR(ctx->type)) { |
549 |
|
✗ |
avbuf->plane_info[i].length = avbuf->buf.m.planes[i].length; |
550 |
|
✗ |
avbuf->plane_info[i].mm_addr = mmap(NULL, avbuf->buf.m.planes[i].length, |
551 |
|
|
PROT_READ | PROT_WRITE, MAP_SHARED, |
552 |
|
✗ |
buf_to_m2mctx(avbuf)->fd, avbuf->buf.m.planes[i].m.mem_offset); |
553 |
|
|
} else { |
554 |
|
✗ |
avbuf->plane_info[i].length = avbuf->buf.length; |
555 |
|
✗ |
avbuf->plane_info[i].mm_addr = mmap(NULL, avbuf->buf.length, |
556 |
|
|
PROT_READ | PROT_WRITE, MAP_SHARED, |
557 |
|
✗ |
buf_to_m2mctx(avbuf)->fd, avbuf->buf.m.offset); |
558 |
|
|
} |
559 |
|
|
|
560 |
|
✗ |
if (avbuf->plane_info[i].mm_addr == MAP_FAILED) |
561 |
|
✗ |
return AVERROR(ENOMEM); |
562 |
|
|
} |
563 |
|
|
|
564 |
|
✗ |
avbuf->status = V4L2BUF_AVAILABLE; |
565 |
|
|
|
566 |
|
✗ |
if (V4L2_TYPE_IS_OUTPUT(ctx->type)) |
567 |
|
✗ |
return 0; |
568 |
|
|
|
569 |
|
✗ |
if (V4L2_TYPE_IS_MULTIPLANAR(ctx->type)) { |
570 |
|
✗ |
avbuf->buf.m.planes = avbuf->planes; |
571 |
|
✗ |
avbuf->buf.length = avbuf->num_planes; |
572 |
|
|
|
573 |
|
|
} else { |
574 |
|
✗ |
avbuf->buf.bytesused = avbuf->planes[0].bytesused; |
575 |
|
✗ |
avbuf->buf.length = avbuf->planes[0].length; |
576 |
|
|
} |
577 |
|
|
|
578 |
|
✗ |
return ff_v4l2_buffer_enqueue(avbuf); |
579 |
|
|
} |
580 |
|
|
|
581 |
|
✗ |
int ff_v4l2_buffer_enqueue(V4L2Buffer* avbuf) |
582 |
|
|
{ |
583 |
|
|
int ret; |
584 |
|
|
|
585 |
|
✗ |
avbuf->buf.flags = avbuf->flags; |
586 |
|
|
|
587 |
|
✗ |
ret = ioctl(buf_to_m2mctx(avbuf)->fd, VIDIOC_QBUF, &avbuf->buf); |
588 |
|
✗ |
if (ret < 0) |
589 |
|
✗ |
return AVERROR(errno); |
590 |
|
|
|
591 |
|
✗ |
avbuf->status = V4L2BUF_IN_DRIVER; |
592 |
|
|
|
593 |
|
✗ |
return 0; |
594 |
|
|
} |
595 |
|
|
|