LCOV - code coverage report
Current view: top level - libavcodec - v210dec.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 60 69 87.0 %
Date: 2017-12-16 13:57:32 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             : 
      31             : #define READ_PIXELS(a, b, c)         \
      32             :     do {                             \
      33             :         val  = av_le2ne32(*src++);   \
      34             :         *a++ =  val & 0x3FF;         \
      35             :         *b++ = (val >> 10) & 0x3FF;  \
      36             :         *c++ = (val >> 20) & 0x3FF;  \
      37             :     } while (0)
      38             : 
      39       90520 : static void v210_planar_unpack_c(const uint32_t *src, uint16_t *y, uint16_t *u, uint16_t *v, int width)
      40             : {
      41             :     uint32_t val;
      42             :     int i;
      43             : 
      44     5272080 :     for( i = 0; i < width-5; i += 6 ){
      45     5181560 :         READ_PIXELS(u, y, v);
      46     5181560 :         READ_PIXELS(y, u, y);
      47     5181560 :         READ_PIXELS(v, y, u);
      48     5181560 :         READ_PIXELS(y, v, y);
      49             :     }
      50       90520 : }
      51             : 
      52          18 : static av_cold int decode_init(AVCodecContext *avctx)
      53             : {
      54          18 :     V210DecContext *s = avctx->priv_data;
      55             : 
      56          18 :     avctx->pix_fmt             = AV_PIX_FMT_YUV422P10;
      57          18 :     avctx->bits_per_raw_sample = 10;
      58             : 
      59          18 :     s->unpack_frame            = v210_planar_unpack_c;
      60             : 
      61             :     if (HAVE_MMX)
      62          18 :         ff_v210_x86_init(s);
      63             : 
      64          18 :     return 0;
      65             : }
      66             : 
      67         402 : static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
      68             :                         AVPacket *avpkt)
      69             : {
      70         402 :     V210DecContext *s = avctx->priv_data;
      71             : 
      72             :     int h, w, ret, stride, aligned_input;
      73         402 :     AVFrame *pic = data;
      74         402 :     const uint8_t *psrc = avpkt->data;
      75             :     uint16_t *y, *u, *v;
      76             : 
      77         402 :     if (s->custom_stride )
      78           0 :         stride = s->custom_stride;
      79             :     else {
      80         402 :         int aligned_width = ((avctx->width + 47) / 48) * 48;
      81         402 :         stride = aligned_width * 8 / 3;
      82             :     }
      83             : 
      84         402 :     if (avpkt->size < stride * avctx->height) {
      85           1 :         if ((((avctx->width + 23) / 24) * 24 * 8) / 3 * avctx->height == avpkt->size) {
      86           0 :             stride = avpkt->size / avctx->height;
      87           0 :             if (!s->stride_warning_shown)
      88           0 :                 av_log(avctx, AV_LOG_WARNING, "Broken v210 with too small padding (64 byte) detected\n");
      89           0 :             s->stride_warning_shown = 1;
      90             :         } else {
      91           1 :             av_log(avctx, AV_LOG_ERROR, "packet too small\n");
      92           1 :             return AVERROR_INVALIDDATA;
      93             :         }
      94             :     }
      95             : 
      96         401 :     aligned_input = !((uintptr_t)psrc & 0xf) && !(stride & 0xf);
      97         401 :     if (aligned_input != s->aligned_input) {
      98           9 :         s->aligned_input = aligned_input;
      99             :         if (HAVE_MMX)
     100           9 :             ff_v210_x86_init(s);
     101             :     }
     102             : 
     103         401 :     if ((ret = ff_get_buffer(avctx, pic, 0)) < 0)
     104           0 :         return ret;
     105             : 
     106         401 :     y = (uint16_t*)pic->data[0];
     107         401 :     u = (uint16_t*)pic->data[1];
     108         401 :     v = (uint16_t*)pic->data[2];
     109         401 :     pic->pict_type = AV_PICTURE_TYPE_I;
     110         401 :     pic->key_frame = 1;
     111             : 
     112       90921 :     for (h = 0; h < avctx->height; h++) {
     113       90520 :         const uint32_t *src = (const uint32_t*)psrc;
     114             :         uint32_t val;
     115             : 
     116       90520 :         w = (avctx->width / 6) * 6;
     117       90520 :         s->unpack_frame(src, y, u, v, w);
     118             : 
     119       90520 :         y += w;
     120       90520 :         u += w >> 1;
     121       90520 :         v += w >> 1;
     122       90520 :         src += (w << 1) / 3;
     123             : 
     124       90520 :         if (w < avctx->width - 1) {
     125       90520 :             READ_PIXELS(u, y, v);
     126             : 
     127       90520 :             val  = av_le2ne32(*src++);
     128       90520 :             *y++ =  val & 0x3FF;
     129       90520 :             if (w < avctx->width - 3) {
     130       89800 :                 *u++ = (val >> 10) & 0x3FF;
     131       89800 :                 *y++ = (val >> 20) & 0x3FF;
     132             : 
     133       89800 :                 val  = av_le2ne32(*src++);
     134       89800 :                 *v++ =  val & 0x3FF;
     135       89800 :                 *y++ = (val >> 10) & 0x3FF;
     136             :             }
     137             :         }
     138             : 
     139       90520 :         psrc += stride;
     140       90520 :         y += pic->linesize[0] / 2 - avctx->width + (avctx->width & 1);
     141       90520 :         u += pic->linesize[1] / 2 - avctx->width / 2;
     142       90520 :         v += pic->linesize[2] / 2 - avctx->width / 2;
     143             :     }
     144             : 
     145         401 :     if (avctx->field_order > AV_FIELD_PROGRESSIVE) {
     146             :         /* we have interlaced material flagged in container */
     147           0 :         pic->interlaced_frame = 1;
     148           0 :         if (avctx->field_order == AV_FIELD_TT || avctx->field_order == AV_FIELD_TB)
     149           0 :             pic->top_field_first = 1;
     150             :     }
     151             : 
     152         401 :     *got_frame      = 1;
     153             : 
     154         401 :     return avpkt->size;
     155             : }
     156             : 
     157             : #define V210DEC_FLAGS AV_OPT_FLAG_DECODING_PARAM | AV_OPT_FLAG_VIDEO_PARAM
     158             : static const AVOption v210dec_options[] = {
     159             :     {"custom_stride", "Custom V210 stride", offsetof(V210DecContext, custom_stride), AV_OPT_TYPE_INT,
     160             :      {.i64 = 0}, INT_MIN, INT_MAX, V210DEC_FLAGS},
     161             :     {NULL}
     162             : };
     163             : 
     164             : static const AVClass v210dec_class = {
     165             :     .class_name = "V210 Decoder",
     166             :     .item_name  = av_default_item_name,
     167             :     .option     = v210dec_options,
     168             :     .version    = LIBAVUTIL_VERSION_INT,
     169             : };
     170             : 
     171             : AVCodec ff_v210_decoder = {
     172             :     .name           = "v210",
     173             :     .long_name      = NULL_IF_CONFIG_SMALL("Uncompressed 4:2:2 10-bit"),
     174             :     .type           = AVMEDIA_TYPE_VIDEO,
     175             :     .id             = AV_CODEC_ID_V210,
     176             :     .priv_data_size = sizeof(V210DecContext),
     177             :     .init           = decode_init,
     178             :     .decode         = decode_frame,
     179             :     .capabilities   = AV_CODEC_CAP_DR1,
     180             :     .priv_class     = &v210dec_class,
     181             : };

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