LCOV - code coverage report
Current view: top level - libavcodec - pafaudio.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 21 25 84.0 %
Date: 2017-12-18 06:23:41 Functions: 2 2 100.0 %

          Line data    Source code
       1             : /*
       2             :  * Packed Animation File audio decoder
       3             :  * Copyright (c) 2012 Paul B Mahol
       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             : #include "libavutil/intreadwrite.h"
      23             : 
      24             : #include "avcodec.h"
      25             : #include "internal.h"
      26             : #include "mathops.h"
      27             : #include "paf.h"
      28             : 
      29           4 : static av_cold int paf_audio_init(AVCodecContext *avctx)
      30             : {
      31           4 :     if (avctx->channels != 2) {
      32           0 :         av_log(avctx, AV_LOG_ERROR, "invalid number of channels\n");
      33           0 :         return AVERROR_INVALIDDATA;
      34             :     }
      35             : 
      36           4 :     avctx->channel_layout = AV_CH_LAYOUT_STEREO;
      37           4 :     avctx->sample_fmt     = AV_SAMPLE_FMT_S16;
      38             : 
      39           4 :     return 0;
      40             : }
      41             : 
      42           6 : static int paf_audio_decode(AVCodecContext *avctx, void *data,
      43             :                             int *got_frame, AVPacket *pkt)
      44             : {
      45           6 :     AVFrame *frame = data;
      46             :     int16_t *output_samples;
      47           6 :     const uint8_t *src = pkt->data;
      48             :     int frames, ret, i, j;
      49             :     int16_t cb[256];
      50             : 
      51           6 :     frames = pkt->size / PAF_SOUND_FRAME_SIZE;
      52           6 :     if (frames < 1)
      53           0 :         return AVERROR_INVALIDDATA;
      54             : 
      55           6 :     frame->nb_samples = PAF_SOUND_SAMPLES * frames;
      56           6 :     if ((ret = ff_get_buffer(avctx, frame, 0)) < 0)
      57           0 :         return ret;
      58             : 
      59           6 :     output_samples = (int16_t *)frame->data[0];
      60             :     // codebook of 256 16-bit samples and 8-bit indices to it
      61         162 :     for (j = 0; j < frames; j++) {
      62       40092 :         for (i = 0; i < 256; i++)
      63       39936 :             cb[i] = sign_extend(AV_RL16(src + i * 2), 16);
      64         156 :         src += 256 * 2;
      65             :         // always 2 channels
      66      688116 :         for (i = 0; i < PAF_SOUND_SAMPLES * 2; i++)
      67      687960 :             *output_samples++ = cb[*src++];
      68             :     }
      69           6 :     *got_frame = 1;
      70             : 
      71           6 :     return pkt->size;
      72             : }
      73             : 
      74             : AVCodec ff_paf_audio_decoder = {
      75             :     .name         = "paf_audio",
      76             :     .long_name    = NULL_IF_CONFIG_SMALL("Amazing Studio Packed Animation File Audio"),
      77             :     .type         = AVMEDIA_TYPE_AUDIO,
      78             :     .id           = AV_CODEC_ID_PAF_AUDIO,
      79             :     .init         = paf_audio_init,
      80             :     .decode       = paf_audio_decode,
      81             :     .capabilities = AV_CODEC_CAP_DR1,
      82             : };

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