| 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 | }; |