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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 | ||
28 | static av_cold int encode_init(AVCodecContext *avctx) | |
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 | ||
43 | avctx->coded_frame->pict_type = AV_PICTURE_TYPE_I; | |
44 | ||
45 | return 0; | |
46 | } | |
47 | ||
48 | static int encode_frame(AVCodecContext *avctx, AVPacket *pkt, | |
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]; | |
58 | PutByteContext p; | |
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 | ||
110 | static av_cold int encode_close(AVCodecContext *avctx) | |
111 | { | |
112 | av_freep(&avctx->coded_frame); | |
113 | ||
114 | return 0; | |
115 | } | |
116 | ||
117 | AVCodec ff_v210_encoder = { | |
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 | }; |