LCOV - code coverage report
Current view: top level - libavcodec - v210dec.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 61 74 82.4 %
Date: 2018-05-20 11:54:08 Functions: 3 3 100.0 %

          Line data    Source code
       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 "internal.h"
      26             : #include "v210dec.h"
      27             : #include "libavutil/bswap.h"
      28             : #include "libavutil/internal.h"
      29             : #include "libavutil/mem.h"
      30             : #include "libavutil/intreadwrite.h"
      31             : 
      32             : #define READ_PIXELS(a, b, c)         \
      33             :     do {                             \
      34             :         val  = av_le2ne32(*src++);   \
      35             :         *a++ =  val & 0x3FF;         \
      36             :         *b++ = (val >> 10) & 0x3FF;  \
      37             :         *c++ = (val >> 20) & 0x3FF;  \
      38             :     } while (0)
      39             : 
      40       90520 : static void v210_planar_unpack_c(const uint32_t *src, uint16_t *y, uint16_t *u, uint16_t *v, int width)
      41             : {
      42             :     uint32_t val;
      43             :     int i;
      44             : 
      45     5272080 :     for( i = 0; i < width-5; i += 6 ){
      46     5181560 :         READ_PIXELS(u, y, v);
      47     5181560 :         READ_PIXELS(y, u, y);
      48     5181560 :         READ_PIXELS(v, y, u);
      49     5181560 :         READ_PIXELS(y, v, y);
      50             :     }
      51       90520 : }
      52             : 
      53          18 : static av_cold int decode_init(AVCodecContext *avctx)
      54             : {
      55          18 :     V210DecContext *s = avctx->priv_data;
      56             : 
      57          18 :     avctx->pix_fmt             = AV_PIX_FMT_YUV422P10;
      58          18 :     avctx->bits_per_raw_sample = 10;
      59             : 
      60          18 :     s->unpack_frame            = v210_planar_unpack_c;
      61             : 
      62             :     if (HAVE_MMX)
      63          18 :         ff_v210_x86_init(s);
      64             : 
      65          18 :     return 0;
      66             : }
      67             : 
      68         402 : static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
      69             :                         AVPacket *avpkt)
      70             : {
      71         402 :     V210DecContext *s = avctx->priv_data;
      72             : 
      73             :     int h, w, ret, stride, aligned_input;
      74         402 :     AVFrame *pic = data;
      75         402 :     const uint8_t *psrc = avpkt->data;
      76             :     uint16_t *y, *u, *v;
      77             : 
      78         402 :     if (s->custom_stride )
      79           0 :         stride = s->custom_stride;
      80             :     else {
      81         402 :         int aligned_width = ((avctx->width + 47) / 48) * 48;
      82         402 :         stride = aligned_width * 8 / 3;
      83             :     }
      84             : 
      85         402 :     if (avpkt->size < stride * avctx->height) {
      86           1 :         if ((((avctx->width + 23) / 24) * 24 * 8) / 3 * avctx->height == avpkt->size) {
      87           0 :             stride = avpkt->size / avctx->height;
      88           0 :             if (!s->stride_warning_shown)
      89           0 :                 av_log(avctx, AV_LOG_WARNING, "Broken v210 with too small padding (64 byte) detected\n");
      90           0 :             s->stride_warning_shown = 1;
      91             :         } else {
      92           1 :             av_log(avctx, AV_LOG_ERROR, "packet too small\n");
      93           1 :             return AVERROR_INVALIDDATA;
      94             :         }
      95             :     }
      96         401 :     if (   avctx->codec_tag == MKTAG('C', '2', '1', '0')
      97           0 :         && avpkt->size > 64
      98           0 :         && AV_RN32(psrc) == AV_RN32("INFO")
      99           0 :         && avpkt->size - 64 >= stride * avctx->height)
     100           0 :         psrc += 64;
     101             : 
     102         401 :     aligned_input = !((uintptr_t)psrc & 0xf) && !(stride & 0xf);
     103         401 :     if (aligned_input != s->aligned_input) {
     104           9 :         s->aligned_input = aligned_input;
     105             :         if (HAVE_MMX)
     106           9 :             ff_v210_x86_init(s);
     107             :     }
     108             : 
     109         401 :     if ((ret = ff_get_buffer(avctx, pic, 0)) < 0)
     110           0 :         return ret;
     111             : 
     112         401 :     y = (uint16_t*)pic->data[0];
     113         401 :     u = (uint16_t*)pic->data[1];
     114         401 :     v = (uint16_t*)pic->data[2];
     115         401 :     pic->pict_type = AV_PICTURE_TYPE_I;
     116         401 :     pic->key_frame = 1;
     117             : 
     118       90921 :     for (h = 0; h < avctx->height; h++) {
     119       90520 :         const uint32_t *src = (const uint32_t*)psrc;
     120             :         uint32_t val;
     121             : 
     122       90520 :         w = (avctx->width / 6) * 6;
     123       90520 :         s->unpack_frame(src, y, u, v, w);
     124             : 
     125       90520 :         y += w;
     126       90520 :         u += w >> 1;
     127       90520 :         v += w >> 1;
     128       90520 :         src += (w << 1) / 3;
     129             : 
     130       90520 :         if (w < avctx->width - 1) {
     131       90520 :             READ_PIXELS(u, y, v);
     132             : 
     133       90520 :             val  = av_le2ne32(*src++);
     134       90520 :             *y++ =  val & 0x3FF;
     135       90520 :             if (w < avctx->width - 3) {
     136       89800 :                 *u++ = (val >> 10) & 0x3FF;
     137       89800 :                 *y++ = (val >> 20) & 0x3FF;
     138             : 
     139       89800 :                 val  = av_le2ne32(*src++);
     140       89800 :                 *v++ =  val & 0x3FF;
     141       89800 :                 *y++ = (val >> 10) & 0x3FF;
     142             :             }
     143             :         }
     144             : 
     145       90520 :         psrc += stride;
     146       90520 :         y += pic->linesize[0] / 2 - avctx->width + (avctx->width & 1);
     147       90520 :         u += pic->linesize[1] / 2 - avctx->width / 2;
     148       90520 :         v += pic->linesize[2] / 2 - avctx->width / 2;
     149             :     }
     150             : 
     151         401 :     if (avctx->field_order > AV_FIELD_PROGRESSIVE) {
     152             :         /* we have interlaced material flagged in container */
     153           0 :         pic->interlaced_frame = 1;
     154           0 :         if (avctx->field_order == AV_FIELD_TT || avctx->field_order == AV_FIELD_TB)
     155           0 :             pic->top_field_first = 1;
     156             :     }
     157             : 
     158         401 :     *got_frame      = 1;
     159             : 
     160         401 :     return avpkt->size;
     161             : }
     162             : 
     163             : #define V210DEC_FLAGS AV_OPT_FLAG_DECODING_PARAM | AV_OPT_FLAG_VIDEO_PARAM
     164             : static const AVOption v210dec_options[] = {
     165             :     {"custom_stride", "Custom V210 stride", offsetof(V210DecContext, custom_stride), AV_OPT_TYPE_INT,
     166             :      {.i64 = 0}, INT_MIN, INT_MAX, V210DEC_FLAGS},
     167             :     {NULL}
     168             : };
     169             : 
     170             : static const AVClass v210dec_class = {
     171             :     .class_name = "V210 Decoder",
     172             :     .item_name  = av_default_item_name,
     173             :     .option     = v210dec_options,
     174             :     .version    = LIBAVUTIL_VERSION_INT,
     175             : };
     176             : 
     177             : AVCodec ff_v210_decoder = {
     178             :     .name           = "v210",
     179             :     .long_name      = NULL_IF_CONFIG_SMALL("Uncompressed 4:2:2 10-bit"),
     180             :     .type           = AVMEDIA_TYPE_VIDEO,
     181             :     .id             = AV_CODEC_ID_V210,
     182             :     .priv_data_size = sizeof(V210DecContext),
     183             :     .init           = decode_init,
     184             :     .decode         = decode_frame,
     185             :     .capabilities   = AV_CODEC_CAP_DR1,
     186             :     .priv_class     = &v210dec_class,
     187             : };

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