LCOV - code coverage report
Current view: top level - libavformat - nistspheredec.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 41 70 58.6 %
Date: 2017-12-14 01:15:32 Functions: 2 2 100.0 %

          Line data    Source code
       1             : /*
       2             :  * NIST Sphere demuxer
       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/avstring.h"
      23             : #include "libavutil/intreadwrite.h"
      24             : #include "avformat.h"
      25             : #include "internal.h"
      26             : #include "pcm.h"
      27             : 
      28        6130 : static int nist_probe(AVProbeData *p)
      29             : {
      30        6130 :     if (AV_RL64(p->buf) == AV_RL64("NIST_1A\x0a"))
      31           1 :         return AVPROBE_SCORE_MAX;
      32        6129 :     return 0;
      33             : }
      34             : 
      35           1 : static int nist_read_header(AVFormatContext *s)
      36             : {
      37           1 :     char buffer[256], coding[32] = "pcm", format[32] = "01";
      38           1 :     int bps = 0, be = 0;
      39           1 :     int32_t header_size = -1;
      40             :     AVStream *st;
      41             : 
      42           1 :     st = avformat_new_stream(s, NULL);
      43           1 :     if (!st)
      44           0 :         return AVERROR(ENOMEM);
      45             : 
      46           1 :     st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
      47             : 
      48           1 :     ff_get_line(s->pb, buffer, sizeof(buffer));
      49           1 :     ff_get_line(s->pb, buffer, sizeof(buffer));
      50           1 :     sscanf(buffer, "%"SCNd32, &header_size);
      51           1 :     if (header_size <= 0)
      52           0 :         return AVERROR_INVALIDDATA;
      53             : 
      54           7 :     while (!avio_feof(s->pb)) {
      55           6 :         ff_get_line(s->pb, buffer, sizeof(buffer));
      56             : 
      57           6 :         if (avio_tell(s->pb) >= header_size)
      58           0 :             return AVERROR_INVALIDDATA;
      59             : 
      60           6 :         if (!memcmp(buffer, "end_head", 8)) {
      61           1 :             if (!st->codecpar->bits_per_coded_sample)
      62           1 :                 st->codecpar->bits_per_coded_sample = bps << 3;
      63             : 
      64           1 :             if (!av_strcasecmp(coding, "pcm")) {
      65           0 :                 if (st->codecpar->codec_id == AV_CODEC_ID_NONE)
      66           0 :                     st->codecpar->codec_id = ff_get_pcm_codec_id(st->codecpar->bits_per_coded_sample,
      67             :                                                               0, be, 0xFFFF);
      68           1 :             } else if (!av_strcasecmp(coding, "alaw")) {
      69           0 :                 st->codecpar->codec_id = AV_CODEC_ID_PCM_ALAW;
      70           1 :             } else if (!av_strcasecmp(coding, "ulaw") ||
      71           0 :                        !av_strcasecmp(coding, "mu-law")) {
      72           1 :                 st->codecpar->codec_id = AV_CODEC_ID_PCM_MULAW;
      73           0 :             } else if (!av_strncasecmp(coding, "pcm,embedded-shorten", 20)) {
      74           0 :                 st->codecpar->codec_id = AV_CODEC_ID_SHORTEN;
      75           0 :                 if (ff_alloc_extradata(st->codecpar, 1))
      76           0 :                     st->codecpar->extradata[0] = 1;
      77             :             } else {
      78           0 :                 avpriv_request_sample(s, "coding %s", coding);
      79             :             }
      80             : 
      81           1 :             avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate);
      82             : 
      83           1 :             st->codecpar->block_align = st->codecpar->bits_per_coded_sample * st->codecpar->channels / 8;
      84             : 
      85           1 :             if (avio_tell(s->pb) > header_size)
      86           0 :                 return AVERROR_INVALIDDATA;
      87             : 
      88           1 :             avio_skip(s->pb, header_size - avio_tell(s->pb));
      89             : 
      90           1 :             return 0;
      91           5 :         } else if (!memcmp(buffer, "channel_count", 13)) {
      92           1 :             sscanf(buffer, "%*s %*s %u", &st->codecpar->channels);
      93           4 :         } else if (!memcmp(buffer, "sample_byte_format", 18)) {
      94           0 :             sscanf(buffer, "%*s %*s %31s", format);
      95             : 
      96           0 :             if (!av_strcasecmp(format, "01")) {
      97           0 :                 be = 0;
      98           0 :             } else if (!av_strcasecmp(format, "10")) {
      99           0 :                 be = 1;
     100           0 :             } else if (!av_strcasecmp(format, "mu-law")) {
     101           0 :                 st->codecpar->codec_id = AV_CODEC_ID_PCM_MULAW;
     102           0 :             } else if (av_strcasecmp(format, "1")) {
     103           0 :                 avpriv_request_sample(s, "sample byte format %s", format);
     104           0 :                 return AVERROR_PATCHWELCOME;
     105             :             }
     106           4 :         } else if (!memcmp(buffer, "sample_coding", 13)) {
     107           1 :             sscanf(buffer, "%*s %*s %31s", coding);
     108           3 :         } else if (!memcmp(buffer, "sample_count", 12)) {
     109           1 :             sscanf(buffer, "%*s %*s %"SCNd64, &st->duration);
     110           2 :         } else if (!memcmp(buffer, "sample_n_bytes", 14)) {
     111           1 :             sscanf(buffer, "%*s %*s %d", &bps);
     112           1 :         } else if (!memcmp(buffer, "sample_rate", 11)) {
     113           1 :             sscanf(buffer, "%*s %*s %d", &st->codecpar->sample_rate);
     114           0 :         } else if (!memcmp(buffer, "sample_sig_bits", 15)) {
     115           0 :             sscanf(buffer, "%*s %*s %d", &st->codecpar->bits_per_coded_sample);
     116             :         } else {
     117             :             char key[32], value[32];
     118           0 :             if (sscanf(buffer, "%31s %*s %31s", key, value) == 2) {
     119           0 :                 av_dict_set(&s->metadata, key, value, AV_DICT_APPEND);
     120             :             } else {
     121           0 :                 av_log(s, AV_LOG_ERROR, "Failed to parse '%s' as metadata\n", buffer);
     122             :             }
     123             :         }
     124             :     }
     125             : 
     126           0 :     return AVERROR_EOF;
     127             : }
     128             : 
     129             : AVInputFormat ff_nistsphere_demuxer = {
     130             :     .name           = "nistsphere",
     131             :     .long_name      = NULL_IF_CONFIG_SMALL("NIST SPeech HEader REsources"),
     132             :     .read_probe     = nist_probe,
     133             :     .read_header    = nist_read_header,
     134             :     .read_packet    = ff_pcm_read_packet,
     135             :     .read_seek      = ff_pcm_read_seek,
     136             :     .extensions     = "nist,sph",
     137             :     .flags          = AVFMT_GENERIC_INDEX,
     138             : };

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