ffmpeg/libavcodec/v410enc.c

   1 /*
   2  * v410 encoder
   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
  28 static av_cold int v410_encode_init(AVCodecContext *avctx)
  29 {
  30     if (avctx->width & 1) {
  31         av_log(avctx, AV_LOG_ERROR, "v410 requires width to be even.\n");
  32         return AVERROR_INVALIDDATA;
  33     }
  34
  35     avctx->coded_frame = av_frame_alloc();
  36
  37     if (!avctx->coded_frame) {
  38         av_log(avctx, AV_LOG_ERROR, "Could not allocate frame.\n");
  39         return AVERROR(ENOMEM);
  40     }
  41
  42     return 0;
  43 }
  44
  45 static int v410_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
  46                              const AVFrame *pic, int *got_packet)
  47 {
  48     uint8_t *dst;
  49     uint16_t *y, *u, *v;
  50     uint32_t val;
  51     int i, j, ret;
  52
  53     if ((ret = ff_alloc_packet2(avctx, pkt, avctx->width * avctx->height * 4)) < 0)
  54         return ret;
  55     dst = pkt->data;
  56
  57     avctx->coded_frame->key_frame = 1;
  58     avctx->coded_frame->pict_type = AV_PICTURE_TYPE_I;
  59
  60     y = (uint16_t *)pic->data[0];
  61     u = (uint16_t *)pic->data[1];
  62     v = (uint16_t *)pic->data[2];
  63
  64     for (i = 0; i < avctx->height; i++) {
  65         for (j = 0; j < avctx->width; j++) {
  66             val  = u[j] << 2;
  67             val |= y[j] << 12;
  68             val |= (uint32_t) v[j] << 22;
  69             AV_WL32(dst, val);
  70             dst += 4;
  71         }
  72         y += pic->linesize[0] >> 1;
  73         u += pic->linesize[1] >> 1;
  74         v += pic->linesize[2] >> 1;
  75     }
  76
  77     pkt->flags |= AV_PKT_FLAG_KEY;
  78     *got_packet = 1;
  79     return 0;
  80 }
  81
  82 static av_cold int v410_encode_close(AVCodecContext *avctx)
  83 {
  84     av_freep(&avctx->coded_frame);
  85
  86     return 0;
  87 }
  88
  89 AVCodec ff_v410_encoder = {
  90     .name         = "v410",
  91     .long_name    = NULL_IF_CONFIG_SMALL("Uncompressed 4:4:4 10-bit"),
  92     .type         = AVMEDIA_TYPE_VIDEO,
  93     .id           = AV_CODEC_ID_V410,
  94     .init         = v410_encode_init,
  95     .encode2      = v410_encode_frame,
  96     .close        = v410_encode_close,
  97     .pix_fmts     = (const enum AVPixelFormat[]){ AV_PIX_FMT_YUV444P10, AV_PIX_FMT_NONE },
  98 };