| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | /* | ||
| 2 | * Cryo Interactive Entertainment HNM4 demuxer | ||
| 3 | * | ||
| 4 | * Copyright (c) 2012 David Kment | ||
| 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 <inttypes.h> | ||
| 24 | |||
| 25 | #include "libavutil/intreadwrite.h" | ||
| 26 | #include "avformat.h" | ||
| 27 | #include "demux.h" | ||
| 28 | #include "internal.h" | ||
| 29 | |||
| 30 | #define HNM4_TAG MKTAG('H', 'N', 'M', '4') | ||
| 31 | |||
| 32 | #define HNM4_SAMPLE_RATE 22050 | ||
| 33 | #define HNM4_FRAME_FPS 24 | ||
| 34 | |||
| 35 | #define HNM4_CHUNK_ID_PL 19536 | ||
| 36 | #define HNM4_CHUNK_ID_IZ 23113 | ||
| 37 | #define HNM4_CHUNK_ID_IU 21833 | ||
| 38 | #define HNM4_CHUNK_ID_SD 17491 | ||
| 39 | |||
| 40 | typedef struct Hnm4DemuxContext { | ||
| 41 | uint32_t frames; | ||
| 42 | uint32_t currentframe; | ||
| 43 | uint32_t superchunk_remaining; | ||
| 44 | } Hnm4DemuxContext; | ||
| 45 | |||
| 46 | 8066 | static int hnm_probe(const AVProbeData *p) | |
| 47 | { | ||
| 48 |
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8066 | if (p->buf_size < 4) |
| 49 | ✗ | return 0; | |
| 50 | |||
| 51 | // check for HNM4 header. | ||
| 52 | // currently only HNM v4/v4A is supported | ||
| 53 |
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8066 | if (AV_RL32(&p->buf[0]) == HNM4_TAG) |
| 54 | ✗ | return AVPROBE_SCORE_MAX; | |
| 55 | |||
| 56 | 8066 | return 0; | |
| 57 | } | ||
| 58 | |||
| 59 | ✗ | static int hnm_read_header(AVFormatContext *s) | |
| 60 | { | ||
| 61 | ✗ | Hnm4DemuxContext *hnm = s->priv_data; | |
| 62 | ✗ | AVIOContext *pb = s->pb; | |
| 63 | unsigned width, height; | ||
| 64 | AVStream *vst; | ||
| 65 | int ret; | ||
| 66 | |||
| 67 | ✗ | avio_skip(pb, 8); | |
| 68 | ✗ | width = avio_rl16(pb); | |
| 69 | ✗ | height = avio_rl16(pb); | |
| 70 | ✗ | avio_rl32(pb); // filesize | |
| 71 | ✗ | hnm->frames = avio_rl32(pb); | |
| 72 | ✗ | avio_skip(pb, 44); | |
| 73 | |||
| 74 | ✗ | if (width < 256 || width > 640 || | |
| 75 | ✗ | height < 150 || height > 480) { | |
| 76 | ✗ | av_log(s, AV_LOG_ERROR, | |
| 77 | "invalid resolution: %ux%u\n", width, height); | ||
| 78 | ✗ | return AVERROR_INVALIDDATA; | |
| 79 | } | ||
| 80 | |||
| 81 | ✗ | if (!(vst = avformat_new_stream(s, NULL))) | |
| 82 | ✗ | return AVERROR(ENOMEM); | |
| 83 | |||
| 84 | ✗ | vst->codecpar->codec_type = AVMEDIA_TYPE_VIDEO; | |
| 85 | ✗ | vst->codecpar->codec_id = AV_CODEC_ID_HNM4_VIDEO; | |
| 86 | ✗ | vst->codecpar->codec_tag = 0; | |
| 87 | ✗ | vst->codecpar->width = width; | |
| 88 | ✗ | vst->codecpar->height = height; | |
| 89 | ✗ | if ((ret = ff_alloc_extradata(vst->codecpar, 1)) < 0) | |
| 90 | ✗ | return ret; | |
| 91 | |||
| 92 | // TODO: find a better way to detect HNM4A | ||
| 93 | ✗ | vst->codecpar->extradata[0] = width == 640 ? 0x4a : 0x40; | |
| 94 | |||
| 95 | ✗ | vst->start_time = 0; | |
| 96 | |||
| 97 | ✗ | avpriv_set_pts_info(vst, 33, 1, HNM4_FRAME_FPS); | |
| 98 | |||
| 99 | ✗ | return 0; | |
| 100 | } | ||
| 101 | |||
| 102 | ✗ | static int hnm_read_packet(AVFormatContext *s, AVPacket *pkt) | |
| 103 | { | ||
| 104 | ✗ | Hnm4DemuxContext *hnm = s->priv_data; | |
| 105 | ✗ | AVIOContext *pb = s->pb; | |
| 106 | ✗ | int ret = 0; | |
| 107 | |||
| 108 | uint32_t superchunk_size, chunk_size; | ||
| 109 | uint16_t chunk_id; | ||
| 110 | |||
| 111 | ✗ | if (hnm->currentframe == hnm->frames || pb->eof_reached) | |
| 112 | ✗ | return AVERROR_EOF; | |
| 113 | |||
| 114 | ✗ | if (hnm->superchunk_remaining == 0) { | |
| 115 | /* parse next superchunk */ | ||
| 116 | ✗ | superchunk_size = avio_rl24(pb); | |
| 117 | ✗ | if (superchunk_size < 4) | |
| 118 | ✗ | return AVERROR_INVALIDDATA; | |
| 119 | ✗ | avio_skip(pb, 1); | |
| 120 | |||
| 121 | ✗ | hnm->superchunk_remaining = superchunk_size - 4; | |
| 122 | } | ||
| 123 | |||
| 124 | ✗ | chunk_size = avio_rl24(pb); | |
| 125 | ✗ | avio_skip(pb, 1); | |
| 126 | ✗ | chunk_id = avio_rl16(pb); | |
| 127 | ✗ | avio_skip(pb, 2); | |
| 128 | |||
| 129 | ✗ | if (chunk_size > hnm->superchunk_remaining || chunk_size < 8) { | |
| 130 | ✗ | av_log(s, AV_LOG_ERROR, | |
| 131 | "invalid chunk size: %"PRIu32", offset: %"PRId64"\n", | ||
| 132 | chunk_size, avio_tell(pb)); | ||
| 133 | ✗ | avio_skip(pb, hnm->superchunk_remaining - 8); | |
| 134 | ✗ | hnm->superchunk_remaining = 0; | |
| 135 | } | ||
| 136 | |||
| 137 | ✗ | switch (chunk_id) { | |
| 138 | ✗ | case HNM4_CHUNK_ID_PL: | |
| 139 | case HNM4_CHUNK_ID_IZ: | ||
| 140 | case HNM4_CHUNK_ID_IU: | ||
| 141 | ✗ | avio_seek(pb, -8, SEEK_CUR); | |
| 142 | ✗ | ret += av_get_packet(pb, pkt, chunk_size); | |
| 143 | ✗ | hnm->superchunk_remaining -= chunk_size; | |
| 144 | ✗ | if (chunk_id == HNM4_CHUNK_ID_IZ || chunk_id == HNM4_CHUNK_ID_IU) | |
| 145 | ✗ | hnm->currentframe++; | |
| 146 | ✗ | break; | |
| 147 | |||
| 148 | ✗ | case HNM4_CHUNK_ID_SD: | |
| 149 | ✗ | avio_skip(pb, chunk_size - 8); | |
| 150 | ✗ | hnm->superchunk_remaining -= chunk_size; | |
| 151 | ✗ | break; | |
| 152 | |||
| 153 | ✗ | default: | |
| 154 | ✗ | av_log(s, AV_LOG_WARNING, "unknown chunk found: %"PRIu16", offset: %"PRId64"\n", | |
| 155 | chunk_id, avio_tell(pb)); | ||
| 156 | ✗ | avio_skip(pb, chunk_size - 8); | |
| 157 | ✗ | hnm->superchunk_remaining -= chunk_size; | |
| 158 | ✗ | break; | |
| 159 | } | ||
| 160 | |||
| 161 | ✗ | return ret; | |
| 162 | } | ||
| 163 | |||
| 164 | const FFInputFormat ff_hnm_demuxer = { | ||
| 165 | .p.name = "hnm", | ||
| 166 | .p.long_name = NULL_IF_CONFIG_SMALL("Cryo HNM v4"), | ||
| 167 | .p.flags = AVFMT_NO_BYTE_SEEK | AVFMT_NOGENSEARCH | AVFMT_NOBINSEARCH, | ||
| 168 | .priv_data_size = sizeof(Hnm4DemuxContext), | ||
| 169 | .read_probe = hnm_probe, | ||
| 170 | .read_header = hnm_read_header, | ||
| 171 | .read_packet = hnm_read_packet, | ||
| 172 | }; | ||
| 173 |