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 26static av_cold int yuv4_encode_init(AVCodecContext *avctx) 27{ 28 avctx->coded_frame = av_frame_alloc(); 29 30 if (!avctx->coded_frame) { 31 av_log(avctx, AV_LOG_ERROR, "Could not allocate frame.\n"); 32 return AVERROR(ENOMEM); 33 } 34 35 return 0; 36} 37 38static int yuv4_encode_frame(AVCodecContext *avctx, AVPacket *pkt, 39 const AVFrame *pic, int *got_packet) 40{ 41 uint8_t *dst; 42 uint8_t *y, *u, *v; 43 int i, j, ret; 44 45 if ((ret = ff_alloc_packet2(avctx, pkt, 6 * (avctx->width + 1 >> 1) * (avctx->height + 1 >> 1))) < 0) 46 return ret; 47 dst = pkt->data; 48 49 avctx->coded_frame->key_frame = 1; 50 avctx->coded_frame->pict_type = AV_PICTURE_TYPE_I; 51 52 y = pic->data[0]; 53 u = pic->data[1]; 54 v = pic->data[2]; 55 56 for (i = 0; i < avctx->height + 1 >> 1; i++) { 57 for (j = 0; j < avctx->width + 1 >> 1; j++) { 58 *dst++ = u[j] ^ 0x80; 59 *dst++ = v[j] ^ 0x80; 60 *dst++ = y[ 2 * j ]; 61 *dst++ = y[ 2 * j + 1]; 62 *dst++ = y[pic->linesize[0] + 2 * j ]; 63 *dst++ = y[pic->linesize[0] + 2 * j + 1]; 64 } 65 y += 2 * pic->linesize[0]; 66 u += pic->linesize[1]; 67 v += pic->linesize[2]; 68 } 69 70 pkt->flags |= AV_PKT_FLAG_KEY; 71 *got_packet = 1; 72 return 0; 73} 74 75static av_cold int yuv4_encode_close(AVCodecContext *avctx) 76{ 77 av_freep(&avctx->coded_frame); 78 79 return 0; 80} 81 82AVCodec ff_yuv4_encoder = { 83 .name = "yuv4", 84 .long_name = NULL_IF_CONFIG_SMALL("Uncompressed packed 4:2:0"), 85 .type = AVMEDIA_TYPE_VIDEO, 86 .id = AV_CODEC_ID_YUV4, 87 .init = yuv4_encode_init, 88 .encode2 = yuv4_encode_frame, 89 .close = yuv4_encode_close, 90 .pix_fmts = (const enum AVPixelFormat[]){ AV_PIX_FMT_YUV420P, AV_PIX_FMT_NONE }, 91}; 92