blob: ca94a3c171a567ff666de696124630f1039f2231
| 1 | /* |
| 2 | * y41p encoder |
| 3 | * |
| 4 | * Copyright (c) 2012 Paul B Mahol |
| 5 | * |
| 6 | * This file is part of FFmpeg. |
| 7 | * |
| 8 | * FFmpeg is free software; you can redistribute it and/or |
| 9 | * modify it under the terms of the GNU Lesser General Public |
| 10 | * License as published by the Free Software Foundation; either |
| 11 | * version 2.1 of the License, or (at your option) any later version. |
| 12 | * |
| 13 | * FFmpeg is distributed in the hope that it will be useful, |
| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 16 | * Lesser General Public License for more details. |
| 17 | * |
| 18 | * You should have received a copy of the GNU Lesser General Public |
| 19 | * License along with FFmpeg; if not, write to the Free Software |
| 20 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| 21 | */ |
| 22 | |
| 23 | #include "avcodec.h" |
| 24 | #include "internal.h" |
| 25 | |
| 26 | static av_cold int y41p_encode_init(AVCodecContext *avctx) |
| 27 | { |
| 28 | if (avctx->width & 7) { |
| 29 | av_log(avctx, AV_LOG_ERROR, "y41p requires width to be divisible by 8.\n"); |
| 30 | return AVERROR_INVALIDDATA; |
| 31 | } |
| 32 | |
| 33 | avctx->bits_per_coded_sample = 12; |
| 34 | avctx->bit_rate = ff_guess_coded_bitrate(avctx); |
| 35 | |
| 36 | return 0; |
| 37 | } |
| 38 | |
| 39 | static int y41p_encode_frame(AVCodecContext *avctx, AVPacket *pkt, |
| 40 | const AVFrame *pic, int *got_packet) |
| 41 | { |
| 42 | uint8_t *dst; |
| 43 | uint8_t *y, *u, *v; |
| 44 | int i, j, ret; |
| 45 | |
| 46 | if ((ret = ff_alloc_packet2(avctx, pkt, avctx->width * avctx->height * 1.5, 0)) < 0) |
| 47 | return ret; |
| 48 | |
| 49 | dst = pkt->data; |
| 50 | |
| 51 | for (i = avctx->height - 1; i >= 0; i--) { |
| 52 | y = &pic->data[0][i * pic->linesize[0]]; |
| 53 | u = &pic->data[1][i * pic->linesize[1]]; |
| 54 | v = &pic->data[2][i * pic->linesize[2]]; |
| 55 | for (j = 0; j < avctx->width; j += 8) { |
| 56 | *(dst++) = *(u++); |
| 57 | *(dst++) = *(y++); |
| 58 | *(dst++) = *(v++); |
| 59 | *(dst++) = *(y++); |
| 60 | |
| 61 | *(dst++) = *(u++); |
| 62 | *(dst++) = *(y++); |
| 63 | *(dst++) = *(v++); |
| 64 | *(dst++) = *(y++); |
| 65 | |
| 66 | *(dst++) = *(y++); |
| 67 | *(dst++) = *(y++); |
| 68 | *(dst++) = *(y++); |
| 69 | *(dst++) = *(y++); |
| 70 | } |
| 71 | } |
| 72 | |
| 73 | pkt->flags |= AV_PKT_FLAG_KEY; |
| 74 | *got_packet = 1; |
| 75 | return 0; |
| 76 | } |
| 77 | |
| 78 | static av_cold int y41p_encode_close(AVCodecContext *avctx) |
| 79 | { |
| 80 | return 0; |
| 81 | } |
| 82 | |
| 83 | AVCodec ff_y41p_encoder = { |
| 84 | .name = "y41p", |
| 85 | .long_name = NULL_IF_CONFIG_SMALL("Uncompressed YUV 4:1:1 12-bit"), |
| 86 | .type = AVMEDIA_TYPE_VIDEO, |
| 87 | .id = AV_CODEC_ID_Y41P, |
| 88 | .init = y41p_encode_init, |
| 89 | .encode2 = y41p_encode_frame, |
| 90 | .close = y41p_encode_close, |
| 91 | .pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV411P, |
| 92 | AV_PIX_FMT_NONE }, |
| 93 | .capabilities = AV_CODEC_CAP_INTRA_ONLY, |
| 94 | }; |
| 95 |