| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | /* | ||
| 2 | * G.729 raw format demuxer | ||
| 3 | * Copyright (c) 2011 Vladimir Voroshilov | ||
| 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/log.h" | ||
| 23 | #include "libavutil/opt.h" | ||
| 24 | |||
| 25 | #include "avformat.h" | ||
| 26 | #include "demux.h" | ||
| 27 | #include "internal.h" | ||
| 28 | |||
| 29 | typedef struct G729DemuxerContext { | ||
| 30 | AVClass *class; | ||
| 31 | |||
| 32 | int bit_rate; | ||
| 33 | } G729DemuxerContext; | ||
| 34 | |||
| 35 | ✗ | static int g729_read_header(AVFormatContext *s) | |
| 36 | { | ||
| 37 | AVStream* st; | ||
| 38 | ✗ | G729DemuxerContext *s1 = s->priv_data; | |
| 39 | |||
| 40 | ✗ | st = avformat_new_stream(s, NULL); | |
| 41 | ✗ | if (!st) | |
| 42 | ✗ | return AVERROR(ENOMEM); | |
| 43 | |||
| 44 | ✗ | st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO; | |
| 45 | ✗ | st->codecpar->codec_id = AV_CODEC_ID_G729; | |
| 46 | ✗ | st->codecpar->sample_rate = 8000; | |
| 47 | ✗ | st->codecpar->ch_layout = (AVChannelLayout)AV_CHANNEL_LAYOUT_MONO; | |
| 48 | |||
| 49 | ✗ | if (s1 && s1->bit_rate) | |
| 50 | ✗ | s->bit_rate = s1->bit_rate; | |
| 51 | |||
| 52 | ✗ | switch(s->bit_rate) { | |
| 53 | ✗ | case 6400: | |
| 54 | ✗ | st->codecpar->block_align = 8; | |
| 55 | ✗ | break; | |
| 56 | ✗ | case 8000: | |
| 57 | ✗ | st->codecpar->block_align = 10; | |
| 58 | ✗ | break; | |
| 59 | ✗ | default: | |
| 60 | ✗ | av_log(s, AV_LOG_ERROR, "Invalid bit_rate value %"PRId64". " | |
| 61 | "Only 6400 and 8000 b/s are supported.", s->bit_rate); | ||
| 62 | ✗ | return AVERROR(EINVAL); | |
| 63 | } | ||
| 64 | |||
| 65 | ✗ | avpriv_set_pts_info(st, 64, 80, st->codecpar->sample_rate); | |
| 66 | |||
| 67 | ✗ | return 0; | |
| 68 | } | ||
| 69 | |||
| 70 | ✗ | static int g729_read_packet(AVFormatContext *s, AVPacket *pkt) | |
| 71 | { | ||
| 72 | ✗ | AVStream *st = s->streams[0]; | |
| 73 | ✗ | int ret = av_get_packet(s->pb, pkt, st->codecpar->block_align); | |
| 74 | ✗ | if (ret < 0) | |
| 75 | ✗ | return ret; | |
| 76 | |||
| 77 | ✗ | pkt->stream_index = 0; | |
| 78 | ✗ | pkt->dts = pkt->pts = pkt->pos / st->codecpar->block_align; | |
| 79 | ✗ | pkt->duration = 1; | |
| 80 | |||
| 81 | ✗ | return 0; | |
| 82 | } | ||
| 83 | |||
| 84 | #define OFFSET(x) offsetof(G729DemuxerContext, x) | ||
| 85 | static const AVOption g729_options[] = { | ||
| 86 | { "bit_rate", "", OFFSET(bit_rate), AV_OPT_TYPE_INT, { .i64 = 8000 }, 0, INT_MAX, AV_OPT_FLAG_DECODING_PARAM }, | ||
| 87 | { NULL }, | ||
| 88 | }; | ||
| 89 | |||
| 90 | static const AVClass g729_demuxer_class = { | ||
| 91 | .class_name = "g729 demuxer", | ||
| 92 | .item_name = av_default_item_name, | ||
| 93 | .option = g729_options, | ||
| 94 | .version = LIBAVUTIL_VERSION_INT, | ||
| 95 | }; | ||
| 96 | |||
| 97 | const FFInputFormat ff_g729_demuxer = { | ||
| 98 | .p.name = "g729", | ||
| 99 | .p.long_name = NULL_IF_CONFIG_SMALL("G.729 raw format demuxer"), | ||
| 100 | .p.flags = AVFMT_GENERIC_INDEX, | ||
| 101 | .p.extensions = "g729", | ||
| 102 | .p.priv_class = &g729_demuxer_class, | ||
| 103 | .priv_data_size = sizeof(G729DemuxerContext), | ||
| 104 | .read_header = g729_read_header, | ||
| 105 | .read_packet = g729_read_packet, | ||
| 106 | }; | ||
| 107 |