1/* 2 * V210 decoder 3 * 4 * Copyright (C) 2009 Michael Niedermayer <michaelni@gmx.at> 5 * Copyright (c) 2009 Baptiste Coudurier <baptiste dot coudurier at gmail dot com> 6 * 7 * This file is part of FFmpeg. 8 * 9 * FFmpeg is free software; you can redistribute it and/or 10 * modify it under the terms of the GNU Lesser General Public 11 * License as published by the Free Software Foundation; either 12 * version 2.1 of the License, or (at your option) any later version. 13 * 14 * FFmpeg is distributed in the hope that it will be useful, 15 * but WITHOUT ANY WARRANTY; without even the implied warranty of 16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 17 * Lesser General Public License for more details. 18 * 19 * You should have received a copy of the GNU Lesser General Public 20 * License along with FFmpeg; if not, write to the Free Software 21 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 22 */ 23 24#include "avcodec.h" 25#include "libavutil/bswap.h" 26 27static av_cold int decode_init(AVCodecContext *avctx) 28{ 29 if (avctx->width & 1) { 30 av_log(avctx, AV_LOG_ERROR, "v210 needs even width\n"); 31 return -1; 32 } 33 avctx->pix_fmt = PIX_FMT_YUV422P16; 34 avctx->bits_per_raw_sample = 10; 35 36 avctx->coded_frame = avcodec_alloc_frame(); 37 38 return 0; 39} 40 41static int decode_frame(AVCodecContext *avctx, void *data, int *data_size, 42 AVPacket *avpkt) 43{ 44 int h, w; 45 AVFrame *pic = avctx->coded_frame; 46 const uint8_t *psrc = avpkt->data; 47 uint16_t *y, *u, *v; 48 int aligned_width = ((avctx->width + 47) / 48) * 48; 49 int stride = aligned_width * 8 / 3; 50 51 if (pic->data[0]) 52 avctx->release_buffer(avctx, pic); 53 54 if (avpkt->size < stride * avctx->height) { 55 av_log(avctx, AV_LOG_ERROR, "packet too small\n"); 56 return -1; 57 } 58 59 pic->reference = 0; 60 if (avctx->get_buffer(avctx, pic) < 0) 61 return -1; 62 63 y = (uint16_t*)pic->data[0]; 64 u = (uint16_t*)pic->data[1]; 65 v = (uint16_t*)pic->data[2]; 66 pic->pict_type = FF_I_TYPE; 67 pic->key_frame = 1; 68 69#define READ_PIXELS(a, b, c) \ 70 do { \ 71 val = le2me_32(*src++); \ 72 *a++ = val << 6; \ 73 *b++ = (val >> 4) & 0xFFC0; \ 74 *c++ = (val >> 14) & 0xFFC0; \ 75 } while (0) 76 77 for (h = 0; h < avctx->height; h++) { 78 const uint32_t *src = (const uint32_t*)psrc; 79 uint32_t val; 80 for (w = 0; w < avctx->width - 5; w += 6) { 81 READ_PIXELS(u, y, v); 82 READ_PIXELS(y, u, y); 83 READ_PIXELS(v, y, u); 84 READ_PIXELS(y, v, y); 85 } 86 if (w < avctx->width - 1) { 87 READ_PIXELS(u, y, v); 88 89 val = le2me_32(*src++); 90 *y++ = val << 6; 91 } 92 if (w < avctx->width - 3) { 93 *u++ = (val >> 4) & 0xFFC0; 94 *y++ = (val >> 14) & 0xFFC0; 95 96 val = le2me_32(*src++); 97 *v++ = val << 6; 98 *y++ = (val >> 4) & 0xFFC0; 99 } 100 101 psrc += stride; 102 y += pic->linesize[0] / 2 - avctx->width; 103 u += pic->linesize[1] / 2 - avctx->width / 2; 104 v += pic->linesize[2] / 2 - avctx->width / 2; 105 } 106 107 *data_size = sizeof(AVFrame); 108 *(AVFrame*)data = *avctx->coded_frame; 109 110 return avpkt->size; 111} 112 113static av_cold int decode_close(AVCodecContext *avctx) 114{ 115 AVFrame *pic = avctx->coded_frame; 116 if (pic->data[0]) 117 avctx->release_buffer(avctx, pic); 118 av_freep(&avctx->coded_frame); 119 120 return 0; 121} 122 123AVCodec v210_decoder = { 124 "v210", 125 AVMEDIA_TYPE_VIDEO, 126 CODEC_ID_V210, 127 0, 128 decode_init, 129 NULL, 130 decode_close, 131 decode_frame, 132 CODEC_CAP_DR1, 133 .long_name = NULL_IF_CONFIG_SMALL("Uncompressed 4:2:2 10-bit"), 134}; 135