1/* 2 * v410 decoder 3 * 4 * Copyright (c) 2011 Derek Buitenhuis 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 "libavutil/common.h" 24#include "libavutil/intreadwrite.h" 25#include "avcodec.h" 26#include "internal.h" 27 28static av_cold int v410_decode_init(AVCodecContext *avctx) 29{ 30 avctx->pix_fmt = AV_PIX_FMT_YUV444P10; 31 avctx->bits_per_raw_sample = 10; 32 33 if (avctx->width & 1) { 34 if (avctx->err_recognition & AV_EF_EXPLODE) { 35 av_log(avctx, AV_LOG_ERROR, "v410 requires width to be even.\n"); 36 return AVERROR_INVALIDDATA; 37 } else { 38 av_log(avctx, AV_LOG_WARNING, "v410 requires width to be even, continuing anyway.\n"); 39 } 40 } 41 42 return 0; 43} 44 45static int v410_decode_frame(AVCodecContext *avctx, void *data, 46 int *got_frame, AVPacket *avpkt) 47{ 48 AVFrame *pic = data; 49 uint8_t *src = avpkt->data; 50 uint16_t *y, *u, *v; 51 uint32_t val; 52 int i, j, ret; 53 54 if (avpkt->size < 4 * avctx->height * avctx->width) { 55 av_log(avctx, AV_LOG_ERROR, "Insufficient input data.\n"); 56 return AVERROR(EINVAL); 57 } 58 59 if ((ret = ff_get_buffer(avctx, pic, 0)) < 0) 60 return ret; 61 62 pic->key_frame = 1; 63 pic->pict_type = AV_PICTURE_TYPE_I; 64 65 y = (uint16_t *)pic->data[0]; 66 u = (uint16_t *)pic->data[1]; 67 v = (uint16_t *)pic->data[2]; 68 69 for (i = 0; i < avctx->height; i++) { 70 for (j = 0; j < avctx->width; j++) { 71 val = AV_RL32(src); 72 73 u[j] = (val >> 2) & 0x3FF; 74 y[j] = (val >> 12) & 0x3FF; 75 v[j] = (val >> 22); 76 77 src += 4; 78 } 79 80 y += pic->linesize[0] >> 1; 81 u += pic->linesize[1] >> 1; 82 v += pic->linesize[2] >> 1; 83 } 84 85 *got_frame = 1; 86 87 return avpkt->size; 88} 89 90AVCodec ff_v410_decoder = { 91 .name = "v410", 92 .long_name = NULL_IF_CONFIG_SMALL("Uncompressed 4:4:4 10-bit"), 93 .type = AVMEDIA_TYPE_VIDEO, 94 .id = AV_CODEC_ID_V410, 95 .init = v410_decode_init, 96 .decode = v410_decode_frame, 97 .capabilities = CODEC_CAP_DR1, 98}; 99