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v210enc.c
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1 /*
2  * V210 encoder
3  *
4  * Copyright (C) 2009 Michael Niedermayer <michaelni@gmx.at>
5  * Copyright (c) 2009 Baptiste Coudurier <baptiste dot coudurier at gmail dot com>
6  *
7  * This file is part of FFmpeg.
8  *
9  * FFmpeg is free software; you can redistribute it and/or
10  * modify it under the terms of the GNU Lesser General Public
11  * License as published by the Free Software Foundation; either
12  * version 2.1 of the License, or (at your option) any later version.
13  *
14  * FFmpeg is distributed in the hope that it will be useful,
15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17  * Lesser General Public License for more details.
18  *
19  * You should have received a copy of the GNU Lesser General Public
20  * License along with FFmpeg; if not, write to the Free Software
21  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22  */
23 
24 #include "avcodec.h"
25 #include "bytestream.h"
26 #include "internal.h"
27 
29 {
30  if (avctx->width & 1) {
31  av_log(avctx, AV_LOG_ERROR, "v210 needs even width\n");
32  return AVERROR(EINVAL);
33  }
34 
35  if (avctx->bits_per_raw_sample != 10)
36  av_log(avctx, AV_LOG_WARNING, "bits per raw sample: %d != 10-bit\n",
37  avctx->bits_per_raw_sample);
38 
39  avctx->coded_frame = av_frame_alloc();
40  if (!avctx->coded_frame)
41  return AVERROR(ENOMEM);
42 
44 
45  return 0;
46 }
47 
49  const AVFrame *pic, int *got_packet)
50 {
51  int aligned_width = ((avctx->width + 47) / 48) * 48;
52  int stride = aligned_width * 8 / 3;
53  int line_padding = stride - ((avctx->width * 8 + 11) / 12) * 4;
54  int h, w, ret;
55  const uint16_t *y = (const uint16_t*)pic->data[0];
56  const uint16_t *u = (const uint16_t*)pic->data[1];
57  const uint16_t *v = (const uint16_t*)pic->data[2];
59 
60  if ((ret = ff_alloc_packet2(avctx, pkt, avctx->height * stride)) < 0)
61  return ret;
62 
63  bytestream2_init_writer(&p, pkt->data, pkt->size);
64 
65 #define CLIP(v) av_clip(v, 4, 1019)
66 
67 #define WRITE_PIXELS(a, b, c) \
68  do { \
69  val = CLIP(*a++); \
70  val |= (CLIP(*b++) << 10) | \
71  (CLIP(*c++) << 20); \
72  bytestream2_put_le32u(&p, val); \
73  } while (0)
74 
75  for (h = 0; h < avctx->height; h++) {
76  uint32_t val;
77  for (w = 0; w < avctx->width - 5; w += 6) {
78  WRITE_PIXELS(u, y, v);
79  WRITE_PIXELS(y, u, y);
80  WRITE_PIXELS(v, y, u);
81  WRITE_PIXELS(y, v, y);
82  }
83  if (w < avctx->width - 1) {
84  WRITE_PIXELS(u, y, v);
85 
86  val = CLIP(*y++);
87  if (w == avctx->width - 2)
88  bytestream2_put_le32u(&p, val);
89  if (w < avctx->width - 3) {
90  val |= (CLIP(*u++) << 10) | (CLIP(*y++) << 20);
91  bytestream2_put_le32u(&p, val);
92 
93  val = CLIP(*v++) | (CLIP(*y++) << 10);
94  bytestream2_put_le32u(&p, val);
95  }
96  }
97 
98  bytestream2_set_buffer(&p, 0, line_padding);
99 
100  y += pic->linesize[0] / 2 - avctx->width;
101  u += pic->linesize[1] / 2 - avctx->width / 2;
102  v += pic->linesize[2] / 2 - avctx->width / 2;
103  }
104 
105  pkt->flags |= AV_PKT_FLAG_KEY;
106  *got_packet = 1;
107  return 0;
108 }
109 
111 {
112  av_freep(&avctx->coded_frame);
113 
114  return 0;
115 }
116 
118  .name = "v210",
119  .long_name = NULL_IF_CONFIG_SMALL("Uncompressed 4:2:2 10-bit"),
120  .type = AVMEDIA_TYPE_VIDEO,
121  .id = AV_CODEC_ID_V210,
122  .init = encode_init,
123  .encode2 = encode_frame,
124  .close = encode_close,
125  .pix_fmts = (const enum AVPixelFormat[]){ AV_PIX_FMT_YUV422P10, AV_PIX_FMT_NONE },
126 };