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 "bytestream.h" 26#include "internal.h" 27 28static av_cold int encode_init(AVCodecContext *avctx) 29{ 30 if (avctx->width & 1) { 31 av_log(avctx, AV_LOG_ERROR, "v210 needs even width\n"); 32 return AVERROR(EINVAL); 33 } 34 35 if (avctx->bits_per_raw_sample != 10) 36 av_log(avctx, AV_LOG_WARNING, "bits per raw sample: %d != 10-bit\n", 37 avctx->bits_per_raw_sample); 38 39 avctx->coded_frame = av_frame_alloc(); 40 if (!avctx->coded_frame) 41 return AVERROR(ENOMEM); 42 43 avctx->coded_frame->pict_type = AV_PICTURE_TYPE_I; 44 45 return 0; 46} 47 48static int encode_frame(AVCodecContext *avctx, AVPacket *pkt, 49 const AVFrame *pic, int *got_packet) 50{ 51 int aligned_width = ((avctx->width + 47) / 48) * 48; 52 int stride = aligned_width * 8 / 3; 53 int line_padding = stride - ((avctx->width * 8 + 11) / 12) * 4; 54 int h, w, ret; 55 const uint16_t *y = (const uint16_t*)pic->data[0]; 56 const uint16_t *u = (const uint16_t*)pic->data[1]; 57 const uint16_t *v = (const uint16_t*)pic->data[2]; 58 PutByteContext p; 59 60 if ((ret = ff_alloc_packet2(avctx, pkt, avctx->height * stride)) < 0) 61 return ret; 62 63 bytestream2_init_writer(&p, pkt->data, pkt->size); 64 65#define CLIP(v) av_clip(v, 4, 1019) 66 67#define WRITE_PIXELS(a, b, c) \ 68 do { \ 69 val = CLIP(*a++); \ 70 val |= (CLIP(*b++) << 10) | \ 71 (CLIP(*c++) << 20); \ 72 bytestream2_put_le32u(&p, val); \ 73 } while (0) 74 75 for (h = 0; h < avctx->height; h++) { 76 uint32_t val; 77 for (w = 0; w < avctx->width - 5; w += 6) { 78 WRITE_PIXELS(u, y, v); 79 WRITE_PIXELS(y, u, y); 80 WRITE_PIXELS(v, y, u); 81 WRITE_PIXELS(y, v, y); 82 } 83 if (w < avctx->width - 1) { 84 WRITE_PIXELS(u, y, v); 85 86 val = CLIP(*y++); 87 if (w == avctx->width - 2) 88 bytestream2_put_le32u(&p, val); 89 if (w < avctx->width - 3) { 90 val |= (CLIP(*u++) << 10) | (CLIP(*y++) << 20); 91 bytestream2_put_le32u(&p, val); 92 93 val = CLIP(*v++) | (CLIP(*y++) << 10); 94 bytestream2_put_le32u(&p, val); 95 } 96 } 97 98 bytestream2_set_buffer(&p, 0, line_padding); 99 100 y += pic->linesize[0] / 2 - avctx->width; 101 u += pic->linesize[1] / 2 - avctx->width / 2; 102 v += pic->linesize[2] / 2 - avctx->width / 2; 103 } 104 105 pkt->flags |= AV_PKT_FLAG_KEY; 106 *got_packet = 1; 107 return 0; 108} 109 110static av_cold int encode_close(AVCodecContext *avctx) 111{ 112 av_freep(&avctx->coded_frame); 113 114 return 0; 115} 116 117AVCodec ff_v210_encoder = { 118 .name = "v210", 119 .long_name = NULL_IF_CONFIG_SMALL("Uncompressed 4:2:2 10-bit"), 120 .type = AVMEDIA_TYPE_VIDEO, 121 .id = AV_CODEC_ID_V210, 122 .init = encode_init, 123 .encode2 = encode_frame, 124 .close = encode_close, 125 .pix_fmts = (const enum AVPixelFormat[]){ AV_PIX_FMT_YUV422P10, AV_PIX_FMT_NONE }, 126}; 127