| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | /* | ||
| 2 | * Simbiosis game demuxer | ||
| 3 | * | ||
| 4 | * Copyright (C) 2021 Paul B Mahol | ||
| 5 | * | ||
| 6 | * This file is part of FFmpeg. | ||
| 7 | * | ||
| 8 | * FFmpeg is free software; you can redistribute it and/or | ||
| 9 | * modify it under the terms of the GNU Lesser General Public | ||
| 10 | * License as published by the Free Software Foundation; either | ||
| 11 | * version 2.1 of the License, or (at your option) any later version. | ||
| 12 | * | ||
| 13 | * FFmpeg is distributed in the hope that it will be useful, | ||
| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
| 16 | * Lesser General Public License for more details. | ||
| 17 | * | ||
| 18 | * You should have received a copy of the GNU Lesser General Public | ||
| 19 | * License along with FFmpeg; if not, write to the Free Software | ||
| 20 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | ||
| 21 | */ | ||
| 22 | |||
| 23 | #include "avformat.h" | ||
| 24 | #include "demux.h" | ||
| 25 | #include "internal.h" | ||
| 26 | #include "libavutil/intreadwrite.h" | ||
| 27 | #include "libavutil/channel_layout.h" | ||
| 28 | #include "libavutil/internal.h" | ||
| 29 | |||
| 30 | #define IMX_TAG MKTAG('I', 'M', 'A', 'X') | ||
| 31 | |||
| 32 | typedef struct SimbiosisIMXDemuxContext { | ||
| 33 | uint8_t pal[AVPALETTE_SIZE]; | ||
| 34 | int pal_changed; | ||
| 35 | int64_t first_video_packet_pos; | ||
| 36 | } SimbiosisIMXDemuxContext; | ||
| 37 | |||
| 38 | 7186 | static int simbiosis_imx_probe(const AVProbeData *p) | |
| 39 | { | ||
| 40 |
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7186 | if (AV_RL32(p->buf) != IMX_TAG) |
| 41 | 7186 | return 0; | |
| 42 | ✗ | if (AV_RN32(p->buf+4) == 0) | |
| 43 | ✗ | return 0; | |
| 44 | ✗ | if (AV_RN16(p->buf+8) == 0) | |
| 45 | ✗ | return 0; | |
| 46 | ✗ | if (AV_RL16(p->buf+10) != 0x102) | |
| 47 | ✗ | return 0; | |
| 48 | |||
| 49 | ✗ | return AVPROBE_SCORE_EXTENSION + 10; | |
| 50 | } | ||
| 51 | |||
| 52 | ✗ | static int simbiosis_imx_read_header(AVFormatContext *s) | |
| 53 | { | ||
| 54 | ✗ | AVIOContext *pb = s->pb; | |
| 55 | AVStream *vst, *ast; | ||
| 56 | int rate; | ||
| 57 | |||
| 58 | ✗ | vst = avformat_new_stream(s, NULL); | |
| 59 | ✗ | ast = avformat_new_stream(s, NULL); | |
| 60 | ✗ | if (!vst || !ast) | |
| 61 | ✗ | return AVERROR(ENOMEM); | |
| 62 | |||
| 63 | ✗ | avio_skip(pb, 4); | |
| 64 | |||
| 65 | ✗ | vst->codecpar->codec_type = AVMEDIA_TYPE_VIDEO; | |
| 66 | ✗ | vst->codecpar->codec_tag = 0; | |
| 67 | ✗ | vst->codecpar->format = AV_PIX_FMT_PAL8; | |
| 68 | ✗ | vst->codecpar->codec_id = AV_CODEC_ID_SIMBIOSIS_IMX; | |
| 69 | ✗ | vst->start_time = 0; | |
| 70 | ✗ | vst->duration = | |
| 71 | ✗ | vst->nb_frames = avio_rl32(pb); | |
| 72 | ✗ | rate = avio_rl16(pb); | |
| 73 | ✗ | avio_skip(pb, 12); | |
| 74 | |||
| 75 | ✗ | avpriv_set_pts_info(vst, 64, 1, rate); | |
| 76 | |||
| 77 | ✗ | ast->codecpar->codec_type = AVMEDIA_TYPE_AUDIO; | |
| 78 | ✗ | ast->codecpar->codec_tag = 0; | |
| 79 | ✗ | ast->codecpar->codec_id = AV_CODEC_ID_PCM_U8; | |
| 80 | ✗ | ast->codecpar->ch_layout = (AVChannelLayout)AV_CHANNEL_LAYOUT_MONO; | |
| 81 | ✗ | ast->codecpar->sample_rate = 22050; | |
| 82 | ✗ | ast->start_time = 0; | |
| 83 | |||
| 84 | ✗ | avpriv_set_pts_info(ast, 64, 1, 22050); | |
| 85 | |||
| 86 | ✗ | return 0; | |
| 87 | } | ||
| 88 | |||
| 89 | ✗ | static int simbiosis_imx_read_packet(AVFormatContext *s, AVPacket *pkt) | |
| 90 | { | ||
| 91 | ✗ | AVIOContext *pb = s->pb; | |
| 92 | ✗ | SimbiosisIMXDemuxContext *imx = s->priv_data; | |
| 93 | uint32_t chunk_size, chunk_type; | ||
| 94 | ✗ | int64_t pos = avio_tell(pb); | |
| 95 | ✗ | int ret, idx = -1; | |
| 96 | |||
| 97 | ✗ | retry: | |
| 98 | ✗ | if (avio_feof(pb)) | |
| 99 | ✗ | return AVERROR_EOF; | |
| 100 | |||
| 101 | ✗ | chunk_size = avio_rl32(pb); | |
| 102 | ✗ | chunk_type = avio_rl32(pb); | |
| 103 | |||
| 104 | ✗ | switch (chunk_type) { | |
| 105 | ✗ | case 0xAAFF: | |
| 106 | ✗ | return AVERROR_EOF; | |
| 107 | ✗ | case 0xAA99: | |
| 108 | ✗ | idx = 1; | |
| 109 | ✗ | break; | |
| 110 | ✗ | case 0xAA97: | |
| 111 | ✗ | idx = 0; | |
| 112 | ✗ | if (!imx->first_video_packet_pos) | |
| 113 | ✗ | imx->first_video_packet_pos = pos; | |
| 114 | ✗ | break; | |
| 115 | ✗ | case 0xAA98: | |
| 116 | ✗ | if (chunk_size > 256 * 3) | |
| 117 | ✗ | return AVERROR_INVALIDDATA; | |
| 118 | ✗ | for (int i = 0; i < chunk_size / 3; i++) { | |
| 119 | ✗ | unsigned r = avio_r8(pb) << 18; | |
| 120 | ✗ | unsigned g = avio_r8(pb) << 10; | |
| 121 | ✗ | unsigned b = avio_r8(pb) << 2; | |
| 122 | |||
| 123 | ✗ | AV_WL32(imx->pal + i * 4, (0xFFU << 24) | r | g | b); | |
| 124 | } | ||
| 125 | ✗ | imx->pal_changed = 1; | |
| 126 | ✗ | idx = -1; | |
| 127 | ✗ | break; | |
| 128 | ✗ | default: | |
| 129 | ✗ | return AVERROR_INVALIDDATA; | |
| 130 | } | ||
| 131 | |||
| 132 | ✗ | if (idx == -1) | |
| 133 | ✗ | goto retry; | |
| 134 | |||
| 135 | ✗ | ret = av_get_packet(pb, pkt, chunk_size); | |
| 136 | ✗ | if (ret < 0) | |
| 137 | ✗ | return ret; | |
| 138 | |||
| 139 | ✗ | if (imx->pal_changed && idx == 0) { | |
| 140 | ✗ | uint8_t *pal = av_packet_new_side_data(pkt, AV_PKT_DATA_PALETTE, | |
| 141 | AVPALETTE_SIZE); | ||
| 142 | ✗ | if (!pal) | |
| 143 | ✗ | return AVERROR(ENOMEM); | |
| 144 | ✗ | memcpy(pal, imx->pal, AVPALETTE_SIZE); | |
| 145 | ✗ | imx->pal_changed = 0; | |
| 146 | ✗ | if (pos <= imx->first_video_packet_pos) | |
| 147 | ✗ | pkt->flags |= AV_PKT_FLAG_KEY; | |
| 148 | ✗ | } else if (idx == 1) { | |
| 149 | ✗ | pkt->flags |= AV_PKT_FLAG_KEY; | |
| 150 | } | ||
| 151 | |||
| 152 | ✗ | pkt->pos = pos; | |
| 153 | ✗ | pkt->stream_index = idx; | |
| 154 | ✗ | pkt->duration = idx ? chunk_size : 1; | |
| 155 | |||
| 156 | ✗ | return ret; | |
| 157 | } | ||
| 158 | |||
| 159 | const FFInputFormat ff_simbiosis_imx_demuxer = { | ||
| 160 | .p.name = "simbiosis_imx", | ||
| 161 | .p.long_name = NULL_IF_CONFIG_SMALL("Simbiosis Interactive IMX"), | ||
| 162 | .p.extensions = "imx", | ||
| 163 | .p.flags = AVFMT_GENERIC_INDEX, | ||
| 164 | .priv_data_size = sizeof(SimbiosisIMXDemuxContext), | ||
| 165 | .read_probe = simbiosis_imx_probe, | ||
| 166 | .read_header = simbiosis_imx_read_header, | ||
| 167 | .read_packet = simbiosis_imx_read_packet, | ||
| 168 | }; | ||
| 169 |