| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | /* | ||
| 2 | * AVS demuxer. | ||
| 3 | * Copyright (c) 2006 Aurelien Jacobs <aurel@gnuage.org> | ||
| 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 | * Argonaut Games' Creature Shock demuxer | ||
| 25 | * @see http://wiki.multimedia.cx/index.php?title=AVS | ||
| 26 | */ | ||
| 27 | |||
| 28 | #include "avformat.h" | ||
| 29 | #include "demux.h" | ||
| 30 | #include "voc.h" | ||
| 31 | |||
| 32 | |||
| 33 | typedef struct avs_format { | ||
| 34 | VocDecContext voc; | ||
| 35 | AVStream *st_video; | ||
| 36 | AVStream *st_audio; | ||
| 37 | int width; | ||
| 38 | int height; | ||
| 39 | int bits_per_sample; | ||
| 40 | int fps; | ||
| 41 | int nb_frames; | ||
| 42 | int remaining_frame_size; | ||
| 43 | int remaining_audio_size; | ||
| 44 | } AvsFormat; | ||
| 45 | |||
| 46 | typedef enum avs_block_type { | ||
| 47 | AVS_NONE = 0x00, | ||
| 48 | AVS_VIDEO = 0x01, | ||
| 49 | AVS_AUDIO = 0x02, | ||
| 50 | AVS_PALETTE = 0x03, | ||
| 51 | AVS_GAME_DATA = 0x04, | ||
| 52 | } AvsBlockType; | ||
| 53 | |||
| 54 | 7125 | static int avs_probe(const AVProbeData * p) | |
| 55 | { | ||
| 56 | const uint8_t *d; | ||
| 57 | |||
| 58 | 7125 | d = p->buf; | |
| 59 |
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7125 | if (d[0] == 'w' && d[1] == 'W' && d[2] == 0x10 && d[3] == 0) |
| 60 | /* Ensure the buffer probe scores higher than the extension probe. | ||
| 61 | * This avoids problems with misdetection as AviSynth scripts. */ | ||
| 62 | 1 | return AVPROBE_SCORE_EXTENSION + 5; | |
| 63 | |||
| 64 | 7124 | return 0; | |
| 65 | } | ||
| 66 | |||
| 67 | 1 | static int avs_read_header(AVFormatContext * s) | |
| 68 | { | ||
| 69 | 1 | AvsFormat *avs = s->priv_data; | |
| 70 | |||
| 71 | 1 | s->ctx_flags |= AVFMTCTX_NOHEADER; | |
| 72 | |||
| 73 | 1 | avio_skip(s->pb, 4); | |
| 74 | 1 | avs->width = avio_rl16(s->pb); | |
| 75 | 1 | avs->height = avio_rl16(s->pb); | |
| 76 | 1 | avs->bits_per_sample = avio_rl16(s->pb); | |
| 77 | 1 | avs->fps = avio_rl16(s->pb); | |
| 78 | 1 | avs->nb_frames = avio_rl32(s->pb); | |
| 79 | 1 | avs->remaining_frame_size = 0; | |
| 80 | 1 | avs->remaining_audio_size = 0; | |
| 81 | |||
| 82 | 1 | avs->st_video = avs->st_audio = NULL; | |
| 83 | |||
| 84 |
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1 | if (avs->width != 318 || avs->height != 198) |
| 85 | ✗ | av_log(s, AV_LOG_ERROR, "This avs pretend to be %dx%d " | |
| 86 | "when the avs format is supposed to be 318x198 only.\n", | ||
| 87 | avs->width, avs->height); | ||
| 88 | |||
| 89 | 1 | return 0; | |
| 90 | } | ||
| 91 | |||
| 92 | static int | ||
| 93 | 56 | avs_read_video_packet(AVFormatContext * s, AVPacket * pkt, | |
| 94 | AvsBlockType type, int sub_type, int size, | ||
| 95 | uint8_t * palette, int palette_size) | ||
| 96 | { | ||
| 97 | 56 | AvsFormat *avs = s->priv_data; | |
| 98 | int ret; | ||
| 99 | |||
| 100 | 56 | ret = av_new_packet(pkt, size + palette_size); | |
| 101 |
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56 | if (ret < 0) |
| 102 | ✗ | return ret; | |
| 103 | |||
| 104 |
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56 | if (palette_size) { |
| 105 | 1 | pkt->data[0] = 0x00; | |
| 106 | 1 | pkt->data[1] = 0x03; | |
| 107 | 1 | pkt->data[2] = palette_size & 0xFF; | |
| 108 | 1 | pkt->data[3] = (palette_size >> 8) & 0xFF; | |
| 109 | 1 | memcpy(pkt->data + 4, palette, palette_size - 4); | |
| 110 | } | ||
| 111 | |||
| 112 | 56 | pkt->data[palette_size + 0] = sub_type; | |
| 113 | 56 | pkt->data[palette_size + 1] = type; | |
| 114 | 56 | pkt->data[palette_size + 2] = size & 0xFF; | |
| 115 | 56 | pkt->data[palette_size + 3] = (size >> 8) & 0xFF; | |
| 116 | 56 | ret = avio_read(s->pb, pkt->data + palette_size + 4, size - 4) + 4; | |
| 117 |
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56 | if (ret < size) { |
| 118 | ✗ | return AVERROR(EIO); | |
| 119 | } | ||
| 120 | |||
| 121 | 56 | pkt->size = ret + palette_size; | |
| 122 | 56 | pkt->stream_index = avs->st_video->index; | |
| 123 |
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56 | if (sub_type == 0) |
| 124 | 5 | pkt->flags |= AV_PKT_FLAG_KEY; | |
| 125 | |||
| 126 | 56 | return 0; | |
| 127 | } | ||
| 128 | |||
| 129 | 37 | static int avs_read_audio_packet(AVFormatContext * s, AVPacket * pkt) | |
| 130 | { | ||
| 131 | 37 | AvsFormat *avs = s->priv_data; | |
| 132 | int ret; | ||
| 133 | int64_t size; | ||
| 134 | |||
| 135 | 37 | size = avio_tell(s->pb); | |
| 136 | 37 | ret = ff_voc_get_packet(s, pkt, avs->st_audio, avs->remaining_audio_size); | |
| 137 | 37 | size = avio_tell(s->pb) - size; | |
| 138 | 37 | avs->remaining_audio_size -= size; | |
| 139 | |||
| 140 |
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37 | if (ret == AVERROR(EIO)) |
| 141 | ✗ | return 0; /* this indicate EOS */ | |
| 142 |
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37 | if (ret < 0) |
| 143 | 1 | return ret; | |
| 144 |
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36 | if (size != (int)size) { |
| 145 | ✗ | av_packet_unref(pkt); | |
| 146 | ✗ | return AVERROR(EDOM); | |
| 147 | } | ||
| 148 | |||
| 149 | 36 | pkt->stream_index = avs->st_audio->index; | |
| 150 | 36 | pkt->flags |= AV_PKT_FLAG_KEY; | |
| 151 | |||
| 152 | 36 | return size; | |
| 153 | } | ||
| 154 | |||
| 155 | 94 | static int avs_read_packet(AVFormatContext * s, AVPacket * pkt) | |
| 156 | { | ||
| 157 | 94 | AvsFormat *avs = s->priv_data; | |
| 158 | 94 | int sub_type = 0, size = 0; | |
| 159 | 94 | AvsBlockType type = AVS_NONE; | |
| 160 | 94 | int palette_size = 0; | |
| 161 | uint8_t palette[4 + 3 * 256]; | ||
| 162 | int ret; | ||
| 163 | |||
| 164 |
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94 | if (avs->remaining_audio_size > 0) |
| 165 |
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10 | if (avs_read_audio_packet(s, pkt) > 0) |
| 166 | 9 | return 0; | |
| 167 | |||
| 168 | while (1) { | ||
| 169 |
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85 | if (avs->remaining_frame_size <= 0) { |
| 170 |
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58 | if (!avio_rl16(s->pb)) /* found EOF */ |
| 171 | 2 | return AVERROR(EIO); | |
| 172 | 56 | avs->remaining_frame_size = avio_rl16(s->pb) - 4; | |
| 173 | } | ||
| 174 | |||
| 175 |
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84 | while (avs->remaining_frame_size > 0) { |
| 176 | 84 | sub_type = avio_r8(s->pb); | |
| 177 | 84 | type = avio_r8(s->pb); | |
| 178 | 84 | size = avio_rl16(s->pb); | |
| 179 |
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84 | if (size < 4) |
| 180 | ✗ | return AVERROR_INVALIDDATA; | |
| 181 | 84 | avs->remaining_frame_size -= size; | |
| 182 | |||
| 183 |
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84 | switch (type) { |
| 184 | 1 | case AVS_PALETTE: | |
| 185 |
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1 | if (size - 4 > sizeof(palette)) |
| 186 | ✗ | return AVERROR_INVALIDDATA; | |
| 187 | 1 | ret = avio_read(s->pb, palette, size - 4); | |
| 188 |
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1 | if (ret < size - 4) |
| 189 | ✗ | return AVERROR(EIO); | |
| 190 | 1 | palette_size = size; | |
| 191 | 1 | break; | |
| 192 | |||
| 193 | 56 | case AVS_VIDEO: | |
| 194 |
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56 | if (!avs->st_video) { |
| 195 | 1 | avs->st_video = avformat_new_stream(s, NULL); | |
| 196 |
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1 | if (!avs->st_video) |
| 197 | ✗ | return AVERROR(ENOMEM); | |
| 198 | 1 | avs->st_video->codecpar->codec_type = AVMEDIA_TYPE_VIDEO; | |
| 199 | 1 | avs->st_video->codecpar->codec_id = AV_CODEC_ID_AVS; | |
| 200 | 1 | avs->st_video->codecpar->width = avs->width; | |
| 201 | 1 | avs->st_video->codecpar->height = avs->height; | |
| 202 | 1 | avs->st_video->codecpar->bits_per_coded_sample=avs->bits_per_sample; | |
| 203 | 1 | avs->st_video->nb_frames = avs->nb_frames; | |
| 204 | #if FF_API_R_FRAME_RATE | ||
| 205 | 1 | avs->st_video->r_frame_rate = | |
| 206 | #endif | ||
| 207 | 1 | avs->st_video->avg_frame_rate = (AVRational){avs->fps, 1}; | |
| 208 | } | ||
| 209 | 56 | return avs_read_video_packet(s, pkt, type, sub_type, size, | |
| 210 | palette, palette_size); | ||
| 211 | |||
| 212 | 27 | case AVS_AUDIO: | |
| 213 |
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27 | if (!avs->st_audio) { |
| 214 | 1 | avs->st_audio = avformat_new_stream(s, NULL); | |
| 215 |
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1 | if (!avs->st_audio) |
| 216 | ✗ | return AVERROR(ENOMEM); | |
| 217 | 1 | avs->st_audio->codecpar->codec_type = AVMEDIA_TYPE_AUDIO; | |
| 218 | } | ||
| 219 | 27 | avs->remaining_audio_size = size - 4; | |
| 220 | 27 | size = avs_read_audio_packet(s, pkt); | |
| 221 |
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27 | if (size != 0) |
| 222 | 27 | return size; | |
| 223 | ✗ | break; | |
| 224 | |||
| 225 | ✗ | default: | |
| 226 | ✗ | avio_skip(s->pb, size - 4); | |
| 227 | } | ||
| 228 | } | ||
| 229 | } | ||
| 230 | } | ||
| 231 | |||
| 232 | const FFInputFormat ff_avs_demuxer = { | ||
| 233 | .p.name = "avs", | ||
| 234 | .p.long_name = NULL_IF_CONFIG_SMALL("Argonaut Games Creature Shock"), | ||
| 235 | .priv_data_size = sizeof(AvsFormat), | ||
| 236 | .read_probe = avs_probe, | ||
| 237 | .read_header = avs_read_header, | ||
| 238 | .read_packet = avs_read_packet, | ||
| 239 | }; | ||
| 240 |