1/* 2 * V210 encoder 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 "libavcodec/bytestream.h" 26 27static av_cold int encode_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 34 if (avctx->pix_fmt != PIX_FMT_YUV422P16) { 35 av_log(avctx, AV_LOG_ERROR, "v210 needs YUV422P16\n"); 36 return -1; 37 } 38 39 if (avctx->bits_per_raw_sample != 10) 40 av_log(avctx, AV_LOG_WARNING, "bits per raw sample: %d != 10-bit\n", 41 avctx->bits_per_raw_sample); 42 43 avctx->coded_frame = avcodec_alloc_frame(); 44 45 avctx->coded_frame->key_frame = 1; 46 avctx->coded_frame->pict_type = FF_I_TYPE; 47 48 return 0; 49} 50 51static int encode_frame(AVCodecContext *avctx, unsigned char *buf, 52 int buf_size, void *data) 53{ 54 const AVFrame *pic = data; 55 int aligned_width = ((avctx->width + 47) / 48) * 48; 56 int stride = aligned_width * 8 / 3; 57 int h, w; 58 const uint16_t *y = (const uint16_t*)pic->data[0]; 59 const uint16_t *u = (const uint16_t*)pic->data[1]; 60 const uint16_t *v = (const uint16_t*)pic->data[2]; 61 uint8_t *p = buf; 62 uint8_t *pdst = buf; 63 64 if (buf_size < aligned_width * avctx->height * 8 / 3) { 65 av_log(avctx, AV_LOG_ERROR, "output buffer too small\n"); 66 return -1; 67 } 68 69#define WRITE_PIXELS(a, b, c) \ 70 do { \ 71 val = (*a++ >> 6) | \ 72 ((*b++ & 0xFFC0) << 4); \ 73 val|= (*c++ & 0xFFC0) << 14; \ 74 bytestream_put_le32(&p, val); \ 75 } while (0) 76 77 for (h = 0; h < avctx->height; h++) { 78 uint32_t val; 79 for (w = 0; w < avctx->width - 5; w += 6) { 80 WRITE_PIXELS(u, y, v); 81 WRITE_PIXELS(y, u, y); 82 WRITE_PIXELS(v, y, u); 83 WRITE_PIXELS(y, v, y); 84 } 85 if (w < avctx->width - 1) { 86 WRITE_PIXELS(u, y, v); 87 88 val = *y++ >> 6; 89 if (w == avctx->width - 2) 90 bytestream_put_le32(&p, val); 91 } 92 if (w < avctx->width - 3) { 93 val |=((*u++ & 0xFFC0) << 4) | 94 ((*y++ & 0xFFC0) << 14); 95 bytestream_put_le32(&p, val); 96 97 val = (*v++ >> 6) | 98 (*y++ & 0xFFC0) << 4; 99 bytestream_put_le32(&p, val); 100 } 101 102 pdst += stride; 103 memset(p, 0, pdst - p); 104 p = pdst; 105 y += pic->linesize[0] / 2 - avctx->width; 106 u += pic->linesize[1] / 2 - avctx->width / 2; 107 v += pic->linesize[2] / 2 - avctx->width / 2; 108 } 109 110 return p - buf; 111} 112 113static av_cold int encode_close(AVCodecContext *avctx) 114{ 115 av_freep(&avctx->coded_frame); 116 117 return 0; 118} 119 120AVCodec v210_encoder = { 121 "v210", 122 AVMEDIA_TYPE_VIDEO, 123 CODEC_ID_V210, 124 0, 125 encode_init, 126 encode_frame, 127 encode_close, 128 .pix_fmts = (const enum PixelFormat[]){PIX_FMT_YUV422P16, PIX_FMT_NONE}, 129 .long_name = NULL_IF_CONFIG_SMALL("Uncompressed 4:2:2 10-bit"), 130}; 131