Subversion Repositories Kolibri OS

Rev

Go to most recent revision | Blame | Last modification | View Log | RSS feed

  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.  
  28. static 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 = avcodec_alloc_frame();
  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.  
  48. static 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.  
  110. static av_cold int encode_close(AVCodecContext *avctx)
  111. {
  112.     av_freep(&avctx->coded_frame);
  113.  
  114.     return 0;
  115. }
  116.  
  117. AVCodec 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.