| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | /* | ||
| 2 | * Electronic Arts .cdata file Demuxer | ||
| 3 | * Copyright (c) 2007 Peter Ross | ||
| 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 | /** | ||
| 23 | * @file | ||
| 24 | * Electronic Arts cdata Format Demuxer | ||
| 25 | * by Peter Ross (pross@xvid.org) | ||
| 26 | * | ||
| 27 | * Technical details here: | ||
| 28 | * http://wiki.multimedia.cx/index.php?title=EA_Command_And_Conquer_3_Audio_Codec | ||
| 29 | */ | ||
| 30 | |||
| 31 | #include "libavutil/channel_layout.h" | ||
| 32 | #include "avformat.h" | ||
| 33 | #include "demux.h" | ||
| 34 | #include "internal.h" | ||
| 35 | |||
| 36 | #include "libavutil/channel_layout.h" | ||
| 37 | |||
| 38 | typedef struct CdataDemuxContext { | ||
| 39 | unsigned int channels; | ||
| 40 | unsigned int audio_pts; | ||
| 41 | } CdataDemuxContext; | ||
| 42 | |||
| 43 | 7128 | static int cdata_probe(const AVProbeData *p) | |
| 44 | { | ||
| 45 | 7128 | const uint8_t *b = p->buf; | |
| 46 | |||
| 47 |
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7128 | if (b[0] == 0x04 && (b[1] == 0x00 || b[1] == 0x04 || b[1] == 0x0C || b[1] == 0x14)) |
| 48 | 169 | return AVPROBE_SCORE_MAX/8; | |
| 49 | 6959 | return 0; | |
| 50 | } | ||
| 51 | |||
| 52 | 1 | static int cdata_read_header(AVFormatContext *s) | |
| 53 | { | ||
| 54 | 1 | CdataDemuxContext *cdata = s->priv_data; | |
| 55 | 1 | AVIOContext *pb = s->pb; | |
| 56 | unsigned int sample_rate, header; | ||
| 57 | AVStream *st; | ||
| 58 | AVChannelLayout channel_layout; | ||
| 59 | |||
| 60 | 1 | header = avio_rb16(pb); | |
| 61 |
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1 | switch (header) { |
| 62 | 1 | case 0x0400: | |
| 63 | 1 | channel_layout = (AVChannelLayout){ .nb_channels = 1, .order = AV_CHANNEL_ORDER_UNSPEC }; | |
| 64 | 1 | break; | |
| 65 | ✗ | case 0x0404: | |
| 66 | ✗ | channel_layout = (AVChannelLayout){ .nb_channels = 2, .order = AV_CHANNEL_ORDER_UNSPEC }; | |
| 67 | ✗ | break; | |
| 68 | ✗ | case 0x040C: | |
| 69 | ✗ | channel_layout = (AVChannelLayout)AV_CHANNEL_LAYOUT_QUAD; break; | |
| 70 | ✗ | case 0x0414: | |
| 71 | ✗ | channel_layout = (AVChannelLayout)AV_CHANNEL_LAYOUT_5POINT1_BACK; break; | |
| 72 | ✗ | default: | |
| 73 | ✗ | av_log(s, AV_LOG_INFO, "unknown header 0x%04x\n", header); | |
| 74 | ✗ | return -1; | |
| 75 | }; | ||
| 76 | 1 | cdata->channels = channel_layout.nb_channels; | |
| 77 | |||
| 78 | 1 | sample_rate = avio_rb16(pb); | |
| 79 |
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1 | avio_skip(pb, (avio_r8(pb) & 0x20) ? 15 : 11); |
| 80 | |||
| 81 | 1 | st = avformat_new_stream(s, NULL); | |
| 82 |
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1 | if (!st) |
| 83 | ✗ | return AVERROR(ENOMEM); | |
| 84 | 1 | st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO; | |
| 85 | 1 | st->codecpar->codec_tag = 0; /* no fourcc */ | |
| 86 | 1 | st->codecpar->codec_id = AV_CODEC_ID_ADPCM_EA_XAS; | |
| 87 | 1 | st->codecpar->ch_layout = channel_layout; | |
| 88 | 1 | st->codecpar->sample_rate = sample_rate; | |
| 89 | 1 | avpriv_set_pts_info(st, 64, 1, sample_rate); | |
| 90 | |||
| 91 | 1 | cdata->audio_pts = 0; | |
| 92 | 1 | return 0; | |
| 93 | } | ||
| 94 | |||
| 95 | 601 | static int cdata_read_packet(AVFormatContext *s, AVPacket *pkt) | |
| 96 | { | ||
| 97 | 601 | CdataDemuxContext *cdata = s->priv_data; | |
| 98 | 601 | int packet_size = 76*cdata->channels; | |
| 99 | |||
| 100 | 601 | int ret = av_get_packet(s->pb, pkt, packet_size); | |
| 101 |
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601 | if (ret < 0) |
| 102 | 1 | return ret; | |
| 103 | 600 | pkt->pts = cdata->audio_pts++; | |
| 104 | 600 | return 0; | |
| 105 | } | ||
| 106 | |||
| 107 | const FFInputFormat ff_ea_cdata_demuxer = { | ||
| 108 | .p.name = "ea_cdata", | ||
| 109 | .p.long_name = NULL_IF_CONFIG_SMALL("Electronic Arts cdata"), | ||
| 110 | .p.extensions = "cdata", | ||
| 111 | .priv_data_size = sizeof(CdataDemuxContext), | ||
| 112 | .read_probe = cdata_probe, | ||
| 113 | .read_header = cdata_read_header, | ||
| 114 | .read_packet = cdata_read_packet, | ||
| 115 | }; | ||
| 116 |