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 "codec_internal.h" 27#include "thread.h" 28 29typedef struct ThreadData { 30 AVFrame *frame; 31 const uint8_t *buf; 32 int stride; 33} ThreadData; 34 35static av_cold int v410_decode_init(AVCodecContext *avctx) 36{ 37 avctx->pix_fmt = AV_PIX_FMT_YUV444P10; 38 avctx->bits_per_raw_sample = 10; 39 40 if (avctx->width & 1) { 41 if (avctx->err_recognition & AV_EF_EXPLODE) { 42 av_log(avctx, AV_LOG_ERROR, "v410 requires width to be even.\n"); 43 return AVERROR_INVALIDDATA; 44 } else { 45 av_log(avctx, AV_LOG_WARNING, "v410 requires width to be even, continuing anyway.\n"); 46 } 47 } 48 49 return 0; 50} 51 52static int v410_decode_slice(AVCodecContext *avctx, void *arg, int jobnr, int threadnr) 53{ 54 ThreadData *td = arg; 55 AVFrame *pic = td->frame; 56 int stride = td->stride; 57 int thread_count = av_clip(avctx->thread_count, 1, avctx->height/4); 58 int slice_start = (avctx->height * jobnr) / thread_count; 59 int slice_end = (avctx->height * (jobnr+1)) / thread_count; 60 const uint8_t *src = td->buf + stride * slice_start; 61 uint16_t *y, *u, *v; 62 uint32_t val; 63 int i, j; 64 65 y = (uint16_t*)pic->data[0] + slice_start * (pic->linesize[0] >> 1); 66 u = (uint16_t*)pic->data[1] + slice_start * (pic->linesize[1] >> 1); 67 v = (uint16_t*)pic->data[2] + slice_start * (pic->linesize[2] >> 1); 68 69 for (i = slice_start; i < slice_end; 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 return 0; 86} 87 88static int v410_decode_frame(AVCodecContext *avctx, AVFrame *pic, 89 int *got_frame, AVPacket *avpkt) 90{ 91 ThreadData td; 92 const uint8_t *src = avpkt->data; 93 int ret; 94 int thread_count = av_clip(avctx->thread_count, 1, avctx->height/4); 95 96 td.stride = avctx->width * 4; 97 if (avpkt->size < 4 * avctx->height * avctx->width) { 98 av_log(avctx, AV_LOG_ERROR, "Insufficient input data.\n"); 99 return AVERROR(EINVAL); 100 } 101 102 if ((ret = ff_thread_get_buffer(avctx, pic, 0)) < 0) 103 return ret; 104 105 pic->key_frame = 1; 106 pic->pict_type = AV_PICTURE_TYPE_I; 107 108 td.buf = src; 109 td.frame = pic; 110 avctx->execute2(avctx, v410_decode_slice, &td, NULL, thread_count); 111 112 *got_frame = 1; 113 114 return avpkt->size; 115} 116 117const FFCodec ff_v410_decoder = { 118 .p.name = "v410", 119 .p.long_name = NULL_IF_CONFIG_SMALL("Uncompressed 4:4:4 10-bit"), 120 .p.type = AVMEDIA_TYPE_VIDEO, 121 .p.id = AV_CODEC_ID_V410, 122 .init = v410_decode_init, 123 FF_CODEC_DECODE_CB(v410_decode_frame), 124 .p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_SLICE_THREADS | 125 AV_CODEC_CAP_FRAME_THREADS, 126 .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE, 127}; 128