blob: cc8846d7e52ddafb11d74b1a7808785d2b2f4a40
| 1 | /* |
| 2 | * libquicktime yuv4 encoder |
| 3 | * |
| 4 | * Copyright (c) 2011 Carl Eugen Hoyos |
| 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 yuv4_encode_init(AVCodecContext *avctx) |
| 27 | { |
| 28 | return 0; |
| 29 | } |
| 30 | |
| 31 | static int yuv4_encode_frame(AVCodecContext *avctx, AVPacket *pkt, |
| 32 | const AVFrame *pic, int *got_packet) |
| 33 | { |
| 34 | uint8_t *dst; |
| 35 | uint8_t *y, *u, *v; |
| 36 | int i, j, ret; |
| 37 | |
| 38 | if ((ret = ff_alloc_packet2(avctx, pkt, 6 * (avctx->width + 1 >> 1) * (avctx->height + 1 >> 1), 0)) < 0) |
| 39 | return ret; |
| 40 | dst = pkt->data; |
| 41 | |
| 42 | y = pic->data[0]; |
| 43 | u = pic->data[1]; |
| 44 | v = pic->data[2]; |
| 45 | |
| 46 | for (i = 0; i < avctx->height + 1 >> 1; i++) { |
| 47 | for (j = 0; j < avctx->width + 1 >> 1; j++) { |
| 48 | *dst++ = u[j] ^ 0x80; |
| 49 | *dst++ = v[j] ^ 0x80; |
| 50 | *dst++ = y[ 2 * j ]; |
| 51 | *dst++ = y[ 2 * j + 1]; |
| 52 | *dst++ = y[pic->linesize[0] + 2 * j ]; |
| 53 | *dst++ = y[pic->linesize[0] + 2 * j + 1]; |
| 54 | } |
| 55 | y += 2 * pic->linesize[0]; |
| 56 | u += pic->linesize[1]; |
| 57 | v += pic->linesize[2]; |
| 58 | } |
| 59 | |
| 60 | pkt->flags |= AV_PKT_FLAG_KEY; |
| 61 | *got_packet = 1; |
| 62 | return 0; |
| 63 | } |
| 64 | |
| 65 | static av_cold int yuv4_encode_close(AVCodecContext *avctx) |
| 66 | { |
| 67 | return 0; |
| 68 | } |
| 69 | |
| 70 | AVCodec ff_yuv4_encoder = { |
| 71 | .name = "yuv4", |
| 72 | .long_name = NULL_IF_CONFIG_SMALL("Uncompressed packed 4:2:0"), |
| 73 | .type = AVMEDIA_TYPE_VIDEO, |
| 74 | .id = AV_CODEC_ID_YUV4, |
| 75 | .init = yuv4_encode_init, |
| 76 | .encode2 = yuv4_encode_frame, |
| 77 | .close = yuv4_encode_close, |
| 78 | .pix_fmts = (const enum AVPixelFormat[]){ AV_PIX_FMT_YUV420P, AV_PIX_FMT_NONE }, |
| 79 | .capabilities = AV_CODEC_CAP_INTRA_ONLY, |
| 80 | }; |
| 81 |