1/* 2 * v308 decoder 3 * Copyright (c) 2011 Carl Eugen Hoyos 4 * 5 * This file is part of FFmpeg. 6 * 7 * FFmpeg is free software; you can redistribute it and/or 8 * modify it under the terms of the GNU Lesser General Public 9 * License as published by the Free Software Foundation; either 10 * version 2.1 of the License, or (at your option) any later version. 11 * 12 * FFmpeg is distributed in the hope that it will be useful, 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 15 * Lesser General Public License for more details. 16 * 17 * You should have received a copy of the GNU Lesser General Public 18 * License along with FFmpeg; if not, write to the Free Software 19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 20 */ 21 22#include "avcodec.h" 23#include "internal.h" 24 25static av_cold int v308_decode_init(AVCodecContext *avctx) 26{ 27 avctx->pix_fmt = AV_PIX_FMT_YUV444P; 28 29 if (avctx->width & 1) 30 av_log(avctx, AV_LOG_WARNING, "v308 requires width to be even.\n"); 31 32 return 0; 33} 34 35static int v308_decode_frame(AVCodecContext *avctx, void *data, 36 int *got_frame, AVPacket *avpkt) 37{ 38 AVFrame *pic = data; 39 const uint8_t *src = avpkt->data; 40 uint8_t *y, *u, *v; 41 int i, j, ret; 42 43 if (avpkt->size < 3 * avctx->height * avctx->width) { 44 av_log(avctx, AV_LOG_ERROR, "Insufficient input data.\n"); 45 return AVERROR(EINVAL); 46 } 47 48 if ((ret = ff_get_buffer(avctx, pic, 0)) < 0) 49 return ret; 50 51 pic->key_frame = 1; 52 pic->pict_type = AV_PICTURE_TYPE_I; 53 54 y = pic->data[0]; 55 u = pic->data[1]; 56 v = pic->data[2]; 57 58 for (i = 0; i < avctx->height; i++) { 59 for (j = 0; j < avctx->width; j++) { 60 v[j] = *src++; 61 y[j] = *src++; 62 u[j] = *src++; 63 } 64 65 y += pic->linesize[0]; 66 u += pic->linesize[1]; 67 v += pic->linesize[2]; 68 } 69 70 *got_frame = 1; 71 72 return avpkt->size; 73} 74 75AVCodec ff_v308_decoder = { 76 .name = "v308", 77 .long_name = NULL_IF_CONFIG_SMALL("Uncompressed packed 4:4:4"), 78 .type = AVMEDIA_TYPE_VIDEO, 79 .id = AV_CODEC_ID_V308, 80 .init = v308_decode_init, 81 .decode = v308_decode_frame, 82 .capabilities = CODEC_CAP_DR1, 83}; 84