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 26static 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->coded_frame = av_frame_alloc(); 34 avctx->bits_per_coded_sample = 12; 35 36 if (!avctx->coded_frame) { 37 av_log(avctx, AV_LOG_ERROR, "Could not allocate frame.\n"); 38 return AVERROR(ENOMEM); 39 } 40 41 return 0; 42} 43 44static int y41p_encode_frame(AVCodecContext *avctx, AVPacket *pkt, 45 const AVFrame *pic, int *got_packet) 46{ 47 uint8_t *dst; 48 uint8_t *y, *u, *v; 49 int i, j, ret; 50 51 if ((ret = ff_alloc_packet2(avctx, pkt, avctx->width * avctx->height * 1.5)) < 0) 52 return ret; 53 54 avctx->coded_frame->key_frame = 1; 55 avctx->coded_frame->pict_type = AV_PICTURE_TYPE_I; 56 dst = pkt->data; 57 58 for (i = avctx->height - 1; i >= 0; i--) { 59 y = &pic->data[0][i * pic->linesize[0]]; 60 u = &pic->data[1][i * pic->linesize[1]]; 61 v = &pic->data[2][i * pic->linesize[2]]; 62 for (j = 0; j < avctx->width; j += 8) { 63 *(dst++) = *(u++); 64 *(dst++) = *(y++); 65 *(dst++) = *(v++); 66 *(dst++) = *(y++); 67 68 *(dst++) = *(u++); 69 *(dst++) = *(y++); 70 *(dst++) = *(v++); 71 *(dst++) = *(y++); 72 73 *(dst++) = *(y++); 74 *(dst++) = *(y++); 75 *(dst++) = *(y++); 76 *(dst++) = *(y++); 77 } 78 } 79 80 pkt->flags |= AV_PKT_FLAG_KEY; 81 *got_packet = 1; 82 return 0; 83} 84 85static av_cold int y41p_encode_close(AVCodecContext *avctx) 86{ 87 av_freep(&avctx->coded_frame); 88 89 return 0; 90} 91 92AVCodec ff_y41p_encoder = { 93 .name = "y41p", 94 .long_name = NULL_IF_CONFIG_SMALL("Uncompressed YUV 4:1:1 12-bit"), 95 .type = AVMEDIA_TYPE_VIDEO, 96 .id = AV_CODEC_ID_Y41P, 97 .init = y41p_encode_init, 98 .encode2 = y41p_encode_frame, 99 .close = y41p_encode_close, 100 .pix_fmts = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV411P, 101 AV_PIX_FMT_NONE }, 102}; 103