| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | /* | ||
| 2 | * AFC 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/channel_layout.h" | ||
| 23 | #include "avformat.h" | ||
| 24 | #include "demux.h" | ||
| 25 | #include "internal.h" | ||
| 26 | |||
| 27 | typedef struct AFCDemuxContext { | ||
| 28 | int64_t data_end; | ||
| 29 | } AFCDemuxContext; | ||
| 30 | |||
| 31 | ✗ | static int afc_read_header(AVFormatContext *s) | |
| 32 | { | ||
| 33 | ✗ | AFCDemuxContext *c = s->priv_data; | |
| 34 | AVStream *st; | ||
| 35 | int ret; | ||
| 36 | |||
| 37 | ✗ | st = avformat_new_stream(s, NULL); | |
| 38 | ✗ | if (!st) | |
| 39 | ✗ | return AVERROR(ENOMEM); | |
| 40 | ✗ | st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO; | |
| 41 | ✗ | st->codecpar->codec_id = AV_CODEC_ID_ADPCM_AFC; | |
| 42 | ✗ | st->codecpar->ch_layout = (AVChannelLayout)AV_CHANNEL_LAYOUT_STEREO; | |
| 43 | |||
| 44 | ✗ | if ((ret = ff_alloc_extradata(st->codecpar, 1)) < 0) | |
| 45 | ✗ | return ret; | |
| 46 | ✗ | st->codecpar->extradata[0] = 8 * st->codecpar->ch_layout.nb_channels; | |
| 47 | |||
| 48 | ✗ | c->data_end = avio_rb32(s->pb) + 32LL; | |
| 49 | ✗ | st->duration = avio_rb32(s->pb); | |
| 50 | ✗ | st->codecpar->sample_rate = avio_rb16(s->pb); | |
| 51 | ✗ | avio_skip(s->pb, 22); | |
| 52 | ✗ | avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate); | |
| 53 | |||
| 54 | ✗ | return 0; | |
| 55 | } | ||
| 56 | |||
| 57 | ✗ | static int afc_read_packet(AVFormatContext *s, AVPacket *pkt) | |
| 58 | { | ||
| 59 | ✗ | AFCDemuxContext *c = s->priv_data; | |
| 60 | ✗ | int64_t size = c->data_end - avio_tell(s->pb); | |
| 61 | int ret; | ||
| 62 | |||
| 63 | ✗ | size = FFMIN(size, 18 * 128); | |
| 64 | ✗ | if (size <= 0) | |
| 65 | ✗ | return AVERROR_EOF; | |
| 66 | |||
| 67 | ✗ | ret = av_get_packet(s->pb, pkt, size); | |
| 68 | ✗ | pkt->stream_index = 0; | |
| 69 | ✗ | return ret; | |
| 70 | } | ||
| 71 | |||
| 72 | const FFInputFormat ff_afc_demuxer = { | ||
| 73 | .p.name = "afc", | ||
| 74 | .p.long_name = NULL_IF_CONFIG_SMALL("AFC"), | ||
| 75 | .p.extensions = "afc", | ||
| 76 | .p.flags = AVFMT_NOBINSEARCH | AVFMT_NOGENSEARCH | AVFMT_NO_BYTE_SEEK, | ||
| 77 | .priv_data_size = sizeof(AFCDemuxContext), | ||
| 78 | .read_header = afc_read_header, | ||
| 79 | .read_packet = afc_read_packet, | ||
| 80 | }; | ||
| 81 |