LCOV - code coverage report
Current view: top level - libavformat - g726.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 0 17 0.0 %
Date: 2017-12-15 11:05:35 Functions: 0 2 0.0 %

          Line data    Source code
       1             : /*
       2             :  * G.726 raw demuxer
       3             :  * Copyright 2017 Carl Eugen Hoyos
       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 "avformat.h"
      23             : #include "internal.h"
      24             : #include "libavutil/opt.h"
      25             : 
      26             : typedef struct G726Context {
      27             :     AVClass *class;
      28             :     int code_size;
      29             :     int sample_rate;
      30             : } G726Context;
      31             : 
      32           0 : static int g726_read_header(AVFormatContext *s)
      33             : {
      34           0 :     G726Context *c = s->priv_data;
      35           0 :     AVStream *st = avformat_new_stream(s, NULL);
      36           0 :     if (!st)
      37           0 :         return AVERROR(ENOMEM);
      38             : 
      39           0 :     st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
      40           0 :     st->codecpar->codec_id   = s->iformat->raw_codec_id;
      41             : 
      42           0 :     st->codecpar->sample_rate           = c->sample_rate;
      43           0 :     st->codecpar->bits_per_coded_sample = c->code_size;
      44           0 :     st->codecpar->bit_rate              = ((int[]){ 16000, 24000, 32000, 40000 })[c->code_size - 2];
      45           0 :     st->codecpar->channels              = 1;
      46             : 
      47           0 :     return 0;
      48             : }
      49             : 
      50           0 : static int g726_read_packet(AVFormatContext *s, AVPacket *pkt)
      51             : {
      52             :     int res;
      53           0 :     res = av_get_packet(s->pb, pkt, 1020); // a size similar to RAW_PACKET_SIZE divisible by all code_size values
      54           0 :     if (res < 0)
      55           0 :         return res;
      56           0 :     return 0;
      57             : }
      58             : 
      59             : #define OFFSET(x) offsetof(G726Context, x)
      60             : static const AVOption options[] = {
      61             :     { "code_size", "Bits per G.726 code",
      62             :         OFFSET(code_size),   AV_OPT_TYPE_INT, {.i64 =    4}, 2,       5, AV_OPT_FLAG_DECODING_PARAM },
      63             :     { "sample_rate", "",
      64             :         OFFSET(sample_rate), AV_OPT_TYPE_INT, {.i64 = 8000}, 0, INT_MAX, AV_OPT_FLAG_DECODING_PARAM },
      65             :     { NULL },
      66             : };
      67             : 
      68             : #if CONFIG_G726_DEMUXER
      69             : static const AVClass g726le_demuxer_class = {
      70             :     .class_name     = "G.726 big-endian demuxer",
      71             :     .item_name      = av_default_item_name,
      72             :     .option         = options,
      73             :     .version        = LIBAVUTIL_VERSION_INT,
      74             : };
      75             : 
      76             : AVInputFormat ff_g726_demuxer = {
      77             :     .name           = "g726",
      78             :     .long_name      = NULL_IF_CONFIG_SMALL("raw big-endian G.726 (\"left aligned\")"),
      79             :     .read_header    = g726_read_header,
      80             :     .read_packet    = g726_read_packet,
      81             :     .priv_data_size = sizeof(G726Context),
      82             :     .priv_class     = &g726le_demuxer_class,
      83             :     .raw_codec_id   = AV_CODEC_ID_ADPCM_G726,
      84             : };
      85             : #endif
      86             : 
      87             : #if CONFIG_G726LE_DEMUXER
      88             : static const AVClass g726_demuxer_class = {
      89             :     .class_name     = "G.726 little-endian demuxer",
      90             :     .item_name      = av_default_item_name,
      91             :     .option         = options,
      92             :     .version        = LIBAVUTIL_VERSION_INT,
      93             : };
      94             : 
      95             : AVInputFormat ff_g726le_demuxer = {
      96             :     .name           = "g726le",
      97             :     .long_name      = NULL_IF_CONFIG_SMALL("raw little-endian G.726 (\"right aligned\")"),
      98             :     .read_header    = g726_read_header,
      99             :     .read_packet    = g726_read_packet,
     100             :     .priv_data_size = sizeof(G726Context),
     101             :     .priv_class     = &g726_demuxer_class,
     102             :     .raw_codec_id   = AV_CODEC_ID_ADPCM_G726LE,
     103             : };
     104             : #endif
     105             : 

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