LCOV - code coverage report
Current view: top level - libavcodec - cljrdec.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 29 32 90.6 %
Date: 2017-12-14 01:15:32 Functions: 2 2 100.0 %

          Line data    Source code
       1             : /*
       2             :  * Cirrus Logic AccuPak (CLJR) decoder
       3             :  * Copyright (c) 2003 Alex Beregszaszi
       4             :  *
       5             :  * This file is part of FFmpeg.
       6             :  *
       7             :  * FFmpeg is free software; you can redistribute it and/or
       8             :  * modify it under the terms of the GNU Lesser General Public
       9             :  * License as published by the Free Software Foundation; either
      10             :  * version 2.1 of the License, or (at your option) any later version.
      11             :  *
      12             :  * FFmpeg is distributed in the hope that it will be useful,
      13             :  * but WITHOUT ANY WARRANTY; without even the implied warranty of
      14             :  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      15             :  * Lesser General Public License for more details.
      16             :  *
      17             :  * You should have received a copy of the GNU Lesser General Public
      18             :  * License along with FFmpeg; if not, write to the Free Software
      19             :  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
      20             :  */
      21             : 
      22             : /**
      23             :  * @file
      24             :  * Cirrus Logic AccuPak decoder.
      25             :  */
      26             : 
      27             : #include "avcodec.h"
      28             : #include "get_bits.h"
      29             : #include "internal.h"
      30             : 
      31         237 : static int decode_frame(AVCodecContext *avctx,
      32             :                         void *data, int *got_frame,
      33             :                         AVPacket *avpkt)
      34             : {
      35         237 :     const uint8_t *buf = avpkt->data;
      36         237 :     int buf_size       = avpkt->size;
      37             :     GetBitContext gb;
      38         237 :     AVFrame * const p = data;
      39             :     int x, y, ret;
      40             : 
      41         237 :     if (avctx->height <= 0 || avctx->width <= 0) {
      42           0 :         av_log(avctx, AV_LOG_ERROR, "Invalid width or height\n");
      43           0 :         return AVERROR_INVALIDDATA;
      44             :     }
      45             : 
      46         237 :     if (buf_size / avctx->height < avctx->width) {
      47           1 :         av_log(avctx, AV_LOG_ERROR,
      48             :                "Resolution larger than buffer size. Invalid header?\n");
      49           1 :         return AVERROR_INVALIDDATA;
      50             :     }
      51             : 
      52         236 :     if ((ret = ff_get_buffer(avctx, p, 0)) < 0)
      53           0 :         return ret;
      54         236 :     p->pict_type = AV_PICTURE_TYPE_I;
      55         236 :     p->key_frame = 1;
      56             : 
      57         236 :     init_get_bits(&gb, buf, buf_size * 8);
      58             : 
      59       51616 :     for (y = 0; y < avctx->height; y++) {
      60       51380 :         uint8_t *luma = &p->data[0][y * p->linesize[0]];
      61       51380 :         uint8_t *cb   = &p->data[1][y * p->linesize[1]];
      62       51380 :         uint8_t *cr   = &p->data[2][y * p->linesize[2]];
      63     4257080 :         for (x = 0; x < avctx->width; x += 4) {
      64     4205700 :             luma[3] = (get_bits(&gb, 5)*33) >> 2;
      65     4205700 :             luma[2] = (get_bits(&gb, 5)*33) >> 2;
      66     4205700 :             luma[1] = (get_bits(&gb, 5)*33) >> 2;
      67     4205700 :             luma[0] = (get_bits(&gb, 5)*33) >> 2;
      68     4205700 :             luma += 4;
      69     4205700 :             *(cb++) = get_bits(&gb, 6) << 2;
      70     4205700 :             *(cr++) = get_bits(&gb, 6) << 2;
      71             :         }
      72             :     }
      73             : 
      74         236 :     *got_frame = 1;
      75             : 
      76         236 :     return buf_size;
      77             : }
      78             : 
      79          10 : static av_cold int decode_init(AVCodecContext *avctx)
      80             : {
      81          10 :     avctx->pix_fmt = AV_PIX_FMT_YUV411P;
      82          10 :     return 0;
      83             : }
      84             : 
      85             : AVCodec ff_cljr_decoder = {
      86             :     .name           = "cljr",
      87             :     .long_name      = NULL_IF_CONFIG_SMALL("Cirrus Logic AccuPak"),
      88             :     .type           = AVMEDIA_TYPE_VIDEO,
      89             :     .id             = AV_CODEC_ID_CLJR,
      90             :     .init           = decode_init,
      91             :     .decode         = decode_frame,
      92             :     .capabilities   = AV_CODEC_CAP_DR1,
      93             : };
      94             : 

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