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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 6148 | serge | 1 | /* |
| 2 | * Silicon Graphics Movie demuxer |
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| 3 | * Copyright (c) 2012 Peter Ross |
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| 4 | * |
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| 5 | * This file is part of FFmpeg. |
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| 6 | * |
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| 7 | * FFmpeg is free software; you can redistribute it and/or |
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| 8 | * modify it under the terms of the GNU Lesser General Public |
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| 9 | * License as published by the Free Software Foundation; either |
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| 10 | * version 2.1 of the License, or (at your option) any later version. |
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| 11 | * |
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| 12 | * FFmpeg is distributed in the hope that it will be useful, |
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| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 15 | * Lesser General Public License for more details. |
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| 16 | * |
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| 17 | * You should have received a copy of the GNU Lesser General Public |
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| 18 | * License along with FFmpeg; if not, write to the Free Software |
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| 19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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| 20 | */ |
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| 21 | |||
| 22 | /** |
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| 23 | * @file |
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| 24 | * Silicon Graphics Movie demuxer |
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| 25 | */ |
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| 26 | |||
| 27 | #include "libavutil/eval.h" |
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| 28 | #include "libavutil/intreadwrite.h" |
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| 29 | #include "libavutil/rational.h" |
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| 30 | #include "avformat.h" |
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| 31 | #include "internal.h" |
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| 32 | |||
| 33 | typedef struct { |
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| 34 | int nb_video_tracks; |
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| 35 | int nb_audio_tracks; |
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| 36 | |||
| 37 | int eof_count; /**< number of streams that have finished */ |
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| 38 | int stream_index; /**< current stream index */ |
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| 39 | int frame[2]; /**< frame nb for current stream */ |
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| 40 | } MvContext; |
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| 41 | |||
| 42 | #define AUDIO_FORMAT_SIGNED 401 |
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| 43 | |||
| 44 | static int mv_probe(AVProbeData *p) |
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| 45 | { |
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| 46 | if (AV_RB32(p->buf) == MKBETAG('M','O','V','I') && AV_RB16(p->buf + 4) < 3) |
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| 47 | return AVPROBE_SCORE_MAX; |
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| 48 | return 0; |
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| 49 | } |
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| 50 | |||
| 51 | static char * var_read_string(AVIOContext *pb, int size) |
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| 52 | { |
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| 53 | char *str = av_malloc(size + 1); |
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| 54 | int n; |
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| 55 | if (!str) |
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| 56 | return NULL; |
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| 57 | n = avio_get_str(pb, size, str, size + 1); |
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| 58 | if (n < size) |
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| 59 | avio_skip(pb, size - n); |
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| 60 | return str; |
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| 61 | } |
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| 62 | |||
| 63 | static int var_read_int(AVIOContext *pb, int size) |
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| 64 | { |
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| 65 | int v; |
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| 66 | char * s = var_read_string(pb, size); |
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| 67 | if (!s || sscanf(s, "%d", &v) != 1) |
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| 68 | v = 0; |
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| 69 | av_free(s); |
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| 70 | return v; |
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| 71 | } |
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| 72 | |||
| 73 | static AVRational var_read_float(AVIOContext *pb, int size) |
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| 74 | { |
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| 75 | AVRational v; |
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| 76 | char * s = var_read_string(pb, size); |
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| 77 | if (!s) |
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| 78 | return (AVRational){0, 0}; |
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| 79 | v = av_d2q(av_strtod(s, NULL), INT_MAX); |
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| 80 | av_free(s); |
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| 81 | return v; |
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| 82 | } |
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| 83 | |||
| 84 | static void var_read_metadata(AVFormatContext *avctx, const char *tag, int size) |
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| 85 | { |
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| 86 | char *value = var_read_string(avctx->pb, size); |
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| 87 | if (value) |
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| 88 | av_dict_set(&avctx->metadata, tag, value, AV_DICT_DONT_STRDUP_VAL); |
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| 89 | } |
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| 90 | |||
| 91 | static int set_channels(AVFormatContext *avctx, AVStream *st, int channels) { |
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| 92 | if (channels <= 0) { |
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| 93 | av_log(avctx, AV_LOG_ERROR, "Channel count %d invalid\n", channels); |
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| 94 | return AVERROR_INVALIDDATA; |
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| 95 | } |
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| 96 | st->codec->channels = channels; |
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| 97 | st->codec->channel_layout = (st->codec->channels == 1) ? AV_CH_LAYOUT_MONO : AV_CH_LAYOUT_STEREO; |
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| 98 | return 0; |
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| 99 | } |
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| 100 | |||
| 101 | /** |
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| 102 | * Parse global variable |
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| 103 | * @return < 0 if unknown |
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| 104 | */ |
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| 105 | static int parse_global_var(AVFormatContext *avctx, AVStream *st, const char *name, int size) |
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| 106 | { |
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| 107 | MvContext *mv = avctx->priv_data; |
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| 108 | AVIOContext *pb = avctx->pb; |
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| 109 | if (!strcmp(name, "__NUM_I_TRACKS")) { |
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| 110 | mv->nb_video_tracks = var_read_int(pb, size); |
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| 111 | } else if (!strcmp(name, "__NUM_A_TRACKS")) { |
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| 112 | mv->nb_audio_tracks = var_read_int(pb, size); |
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| 113 | } else if (!strcmp(name, "COMMENT") || !strcmp(name, "TITLE")) { |
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| 114 | var_read_metadata(avctx, name, size); |
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| 115 | } else if (!strcmp(name, "LOOP_MODE") || !strcmp(name, "NUM_LOOPS") || !strcmp(name, "OPTIMIZED")) { |
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| 116 | avio_skip(pb, size); // ignore |
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| 117 | } else |
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| 118 | return -1; |
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| 119 | |||
| 120 | return 0; |
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| 121 | } |
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| 122 | |||
| 123 | /** |
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| 124 | * Parse audio variable |
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| 125 | * @return < 0 if unknown |
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| 126 | */ |
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| 127 | static int parse_audio_var(AVFormatContext *avctx, AVStream *st, const char *name, int size) |
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| 128 | { |
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| 129 | AVIOContext *pb = avctx->pb; |
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| 130 | if (!strcmp(name, "__DIR_COUNT")) { |
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| 131 | st->nb_frames = var_read_int(pb, size); |
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| 132 | } else if (!strcmp(name, "AUDIO_FORMAT")) { |
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| 133 | st->codec->codec_id = var_read_int(pb, size); |
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| 134 | } else if (!strcmp(name, "COMPRESSION")) { |
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| 135 | st->codec->codec_tag = var_read_int(pb, size); |
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| 136 | } else if (!strcmp(name, "DEFAULT_VOL")) { |
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| 137 | var_read_metadata(avctx, name, size); |
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| 138 | } else if (!strcmp(name, "NUM_CHANNELS")) { |
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| 139 | return set_channels(avctx, st, var_read_int(pb, size)); |
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| 140 | } else if (!strcmp(name, "SAMPLE_RATE")) { |
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| 141 | st->codec->sample_rate = var_read_int(pb, size); |
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| 142 | avpriv_set_pts_info(st, 33, 1, st->codec->sample_rate); |
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| 143 | } else if (!strcmp(name, "SAMPLE_WIDTH")) { |
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| 144 | st->codec->bits_per_coded_sample = var_read_int(pb, size) * 8; |
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| 145 | } else |
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| 146 | return -1; |
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| 147 | return 0; |
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| 148 | } |
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| 149 | |||
| 150 | /** |
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| 151 | * Parse video variable |
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| 152 | * @return < 0 if unknown |
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| 153 | */ |
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| 154 | static int parse_video_var(AVFormatContext *avctx, AVStream *st, const char *name, int size) |
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| 155 | { |
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| 156 | AVIOContext *pb = avctx->pb; |
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| 157 | if (!strcmp(name, "__DIR_COUNT")) { |
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| 158 | st->nb_frames = st->duration = var_read_int(pb, size); |
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| 159 | } else if (!strcmp(name, "COMPRESSION")) { |
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| 160 | char * str = var_read_string(pb, size); |
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| 161 | if (!str) |
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| 162 | return AVERROR_INVALIDDATA; |
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| 163 | if (!strcmp(str, "1")) { |
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| 164 | st->codec->codec_id = AV_CODEC_ID_MVC1; |
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| 165 | } else if (!strcmp(str, "2")) { |
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| 166 | st->codec->pix_fmt = AV_PIX_FMT_ABGR; |
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| 167 | st->codec->codec_id = AV_CODEC_ID_RAWVIDEO; |
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| 168 | } else if (!strcmp(str, "3")) { |
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| 169 | st->codec->codec_id = AV_CODEC_ID_SGIRLE; |
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| 170 | } else if (!strcmp(str, "10")) { |
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| 171 | st->codec->codec_id = AV_CODEC_ID_MJPEG; |
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| 172 | } else if (!strcmp(str, "MVC2")) { |
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| 173 | st->codec->codec_id = AV_CODEC_ID_MVC2; |
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| 174 | } else { |
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| 175 | avpriv_request_sample(avctx, "video compression %s", str); |
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| 176 | } |
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| 177 | av_free(str); |
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| 178 | } else if (!strcmp(name, "FPS")) { |
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| 179 | AVRational fps = var_read_float(pb, size); |
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| 180 | avpriv_set_pts_info(st, 64, fps.den, fps.num); |
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| 181 | } else if (!strcmp(name, "HEIGHT")) { |
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| 182 | st->codec->height = var_read_int(pb, size); |
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| 183 | } else if (!strcmp(name, "PIXEL_ASPECT")) { |
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| 184 | st->sample_aspect_ratio = var_read_float(pb, size); |
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| 185 | av_reduce(&st->sample_aspect_ratio.num, &st->sample_aspect_ratio.den, |
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| 186 | st->sample_aspect_ratio.num, st->sample_aspect_ratio.den, INT_MAX); |
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| 187 | } else if (!strcmp(name, "WIDTH")) { |
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| 188 | st->codec->width = var_read_int(pb, size); |
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| 189 | } else if (!strcmp(name, "ORIENTATION")) { |
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| 190 | if (var_read_int(pb, size) == 1101) { |
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| 191 | st->codec->extradata = av_strdup("BottomUp"); |
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| 192 | st->codec->extradata_size = 9; |
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| 193 | } |
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| 194 | } else if (!strcmp(name, "Q_SPATIAL") || !strcmp(name, "Q_TEMPORAL")) { |
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| 195 | var_read_metadata(avctx, name, size); |
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| 196 | } else if (!strcmp(name, "INTERLACING") || !strcmp(name, "PACKING")) { |
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| 197 | avio_skip(pb, size); // ignore |
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| 198 | } else |
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| 199 | return -1; |
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| 200 | return 0; |
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| 201 | } |
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| 202 | |||
| 203 | static void read_table(AVFormatContext *avctx, AVStream *st, int (*parse)(AVFormatContext *avctx, AVStream *st, const char *name, int size)) |
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| 204 | { |
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| 205 | int count, i; |
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| 206 | AVIOContext *pb = avctx->pb; |
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| 207 | avio_skip(pb, 4); |
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| 208 | count = avio_rb32(pb); |
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| 209 | avio_skip(pb, 4); |
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| 210 | for (i = 0; i < count; i++) { |
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| 211 | char name[17]; |
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| 212 | int size; |
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| 213 | avio_read(pb, name, 16); |
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| 214 | name[sizeof(name) - 1] = 0; |
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| 215 | size = avio_rb32(pb); |
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| 216 | if (parse(avctx, st, name, size) < 0) { |
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| 217 | avpriv_request_sample(avctx, "variable %s", name); |
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| 218 | avio_skip(pb, size); |
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| 219 | } |
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| 220 | } |
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| 221 | } |
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| 222 | |||
| 223 | static void read_index(AVIOContext *pb, AVStream *st) |
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| 224 | { |
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| 225 | uint64_t timestamp = 0; |
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| 226 | int i; |
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| 227 | for (i = 0; i < st->nb_frames; i++) { |
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| 228 | uint32_t pos = avio_rb32(pb); |
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| 229 | uint32_t size = avio_rb32(pb); |
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| 230 | avio_skip(pb, 8); |
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| 231 | av_add_index_entry(st, pos, timestamp, size, 0, AVINDEX_KEYFRAME); |
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| 232 | if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) { |
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| 233 | timestamp += size / (st->codec->channels * 2); |
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| 234 | } else { |
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| 235 | timestamp++; |
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| 236 | } |
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| 237 | } |
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| 238 | } |
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| 239 | |||
| 240 | static int mv_read_header(AVFormatContext *avctx) |
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| 241 | { |
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| 242 | MvContext *mv = avctx->priv_data; |
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| 243 | AVIOContext *pb = avctx->pb; |
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| 244 | AVStream *ast = NULL, *vst = NULL; //initialization to suppress warning |
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| 245 | int version, i; |
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| 246 | |||
| 247 | avio_skip(pb, 4); |
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| 248 | |||
| 249 | version = avio_rb16(pb); |
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| 250 | if (version == 2) { |
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| 251 | uint64_t timestamp; |
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| 252 | int v; |
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| 253 | avio_skip(pb, 22); |
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| 254 | |||
| 255 | /* allocate audio track first to prevent unnecessary seeking |
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| 256 | (audio packet always precede video packet for a given frame) */ |
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| 257 | ast = avformat_new_stream(avctx, NULL); |
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| 258 | if (!ast) |
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| 259 | return AVERROR(ENOMEM); |
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| 260 | |||
| 261 | vst = avformat_new_stream(avctx, NULL); |
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| 262 | if (!vst) |
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| 263 | return AVERROR(ENOMEM); |
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| 264 | vst->codec->codec_type = AVMEDIA_TYPE_VIDEO; |
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| 265 | avpriv_set_pts_info(vst, 64, 1, 15); |
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| 266 | vst->nb_frames = avio_rb32(pb); |
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| 267 | v = avio_rb32(pb); |
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| 268 | switch (v) { |
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| 269 | case 1: |
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| 270 | vst->codec->codec_id = AV_CODEC_ID_MVC1; |
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| 271 | break; |
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| 272 | case 2: |
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| 273 | vst->codec->pix_fmt = AV_PIX_FMT_ARGB; |
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| 274 | vst->codec->codec_id = AV_CODEC_ID_RAWVIDEO; |
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| 275 | break; |
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| 276 | default: |
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| 277 | avpriv_request_sample(avctx, "video compression %i", v); |
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| 278 | break; |
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| 279 | } |
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| 280 | vst->codec->codec_tag = 0; |
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| 281 | vst->codec->width = avio_rb32(pb); |
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| 282 | vst->codec->height = avio_rb32(pb); |
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| 283 | avio_skip(pb, 12); |
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| 284 | |||
| 285 | ast->codec->codec_type = AVMEDIA_TYPE_AUDIO; |
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| 286 | ast->nb_frames = vst->nb_frames; |
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| 287 | ast->codec->sample_rate = avio_rb32(pb); |
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| 288 | avpriv_set_pts_info(ast, 33, 1, ast->codec->sample_rate); |
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| 289 | if (set_channels(avctx, ast, avio_rb32(pb)) < 0) |
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| 290 | return AVERROR_INVALIDDATA; |
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| 291 | |||
| 292 | v = avio_rb32(pb); |
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| 293 | if (v == AUDIO_FORMAT_SIGNED) { |
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| 294 | ast->codec->codec_id = AV_CODEC_ID_PCM_S16BE; |
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| 295 | } else { |
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| 296 | avpriv_request_sample(avctx, "audio compression (format %i)", v); |
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| 297 | } |
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| 298 | |||
| 299 | avio_skip(pb, 12); |
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| 300 | var_read_metadata(avctx, "title", 0x80); |
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| 301 | var_read_metadata(avctx, "comment", 0x100); |
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| 302 | avio_skip(pb, 0x80); |
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| 303 | |||
| 304 | timestamp = 0; |
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| 305 | for (i = 0; i < vst->nb_frames; i++) { |
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| 306 | uint32_t pos = avio_rb32(pb); |
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| 307 | uint32_t asize = avio_rb32(pb); |
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| 308 | uint32_t vsize = avio_rb32(pb); |
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| 309 | avio_skip(pb, 8); |
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| 310 | av_add_index_entry(ast, pos, timestamp, asize, 0, AVINDEX_KEYFRAME); |
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| 311 | av_add_index_entry(vst, pos + asize, i, vsize, 0, AVINDEX_KEYFRAME); |
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| 312 | timestamp += asize / (ast->codec->channels * 2); |
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| 313 | } |
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| 314 | } else if (!version && avio_rb16(pb) == 3) { |
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| 315 | avio_skip(pb, 4); |
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| 316 | |||
| 317 | read_table(avctx, NULL, parse_global_var); |
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| 318 | |||
| 319 | if (mv->nb_audio_tracks > 1) { |
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| 320 | avpriv_request_sample(avctx, "multiple audio streams support"); |
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| 321 | return AVERROR_PATCHWELCOME; |
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| 322 | } else if (mv->nb_audio_tracks) { |
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| 323 | ast = avformat_new_stream(avctx, NULL); |
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| 324 | if (!ast) |
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| 325 | return AVERROR(ENOMEM); |
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| 326 | ast->codec->codec_type = AVMEDIA_TYPE_AUDIO; |
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| 327 | /* temporarily store compression value in codec_tag; format value in codec_id */ |
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| 328 | read_table(avctx, ast, parse_audio_var); |
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| 329 | if (ast->codec->codec_tag == 100 && ast->codec->codec_id == AUDIO_FORMAT_SIGNED && ast->codec->bits_per_coded_sample == 16) { |
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| 330 | ast->codec->codec_id = AV_CODEC_ID_PCM_S16BE; |
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| 331 | } else { |
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| 332 | avpriv_request_sample(avctx, "audio compression %i (format %i, width %i)", |
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| 333 | ast->codec->codec_tag, ast->codec->codec_id, ast->codec->bits_per_coded_sample); |
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| 334 | ast->codec->codec_id = AV_CODEC_ID_NONE; |
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| 335 | } |
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| 336 | ast->codec->codec_tag = 0; |
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| 337 | if (ast->codec->channels <= 0) { |
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| 338 | av_log(avctx, AV_LOG_ERROR, "No valid channel count found\n"); |
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| 339 | return AVERROR_INVALIDDATA; |
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| 340 | } |
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| 341 | } |
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| 342 | |||
| 343 | if (mv->nb_video_tracks > 1) { |
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| 344 | avpriv_request_sample(avctx, "multiple video streams support"); |
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| 345 | return AVERROR_PATCHWELCOME; |
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| 346 | } else if (mv->nb_video_tracks) { |
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| 347 | vst = avformat_new_stream(avctx, NULL); |
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| 348 | if (!vst) |
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| 349 | return AVERROR(ENOMEM); |
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| 350 | vst->codec->codec_type = AVMEDIA_TYPE_VIDEO; |
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| 351 | read_table(avctx, vst, parse_video_var); |
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| 352 | } |
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| 353 | |||
| 354 | if (mv->nb_audio_tracks) |
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| 355 | read_index(pb, ast); |
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| 356 | |||
| 357 | if (mv->nb_video_tracks) |
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| 358 | read_index(pb, vst); |
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| 359 | } else { |
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| 360 | avpriv_request_sample(avctx, "version %i", version); |
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| 361 | return AVERROR_PATCHWELCOME; |
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| 362 | } |
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| 363 | |||
| 364 | return 0; |
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| 365 | } |
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| 366 | |||
| 367 | static int mv_read_packet(AVFormatContext *avctx, AVPacket *pkt) |
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| 368 | { |
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| 369 | MvContext *mv = avctx->priv_data; |
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| 370 | AVIOContext *pb = avctx->pb; |
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| 371 | AVStream *st = avctx->streams[mv->stream_index]; |
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| 372 | const AVIndexEntry *index; |
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| 373 | int frame = mv->frame[mv->stream_index]; |
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| 374 | int ret; |
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| 375 | uint64_t pos; |
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| 376 | |||
| 377 | if (frame < st->nb_index_entries) { |
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| 378 | index = &st->index_entries[frame]; |
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| 379 | pos = avio_tell(pb); |
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| 380 | if (index->pos > pos) |
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| 381 | avio_skip(pb, index->pos - pos); |
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| 382 | else if (index->pos < pos) { |
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| 383 | if (!pb->seekable) |
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| 384 | return AVERROR(EIO); |
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| 385 | ret = avio_seek(pb, index->pos, SEEK_SET); |
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| 386 | if (ret < 0) |
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| 387 | return ret; |
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| 388 | } |
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| 389 | ret = av_get_packet(pb, pkt, index->size); |
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| 390 | if (ret < 0) |
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| 391 | return ret; |
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| 392 | |||
| 393 | pkt->stream_index = mv->stream_index; |
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| 394 | pkt->pts = index->timestamp; |
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| 395 | pkt->flags |= AV_PKT_FLAG_KEY; |
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| 396 | |||
| 397 | mv->frame[mv->stream_index]++; |
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| 398 | mv->eof_count = 0; |
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| 399 | } else { |
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| 400 | mv->eof_count++; |
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| 401 | if (mv->eof_count >= avctx->nb_streams) |
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| 402 | return AVERROR_EOF; |
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| 403 | } |
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| 404 | |||
| 405 | mv->stream_index++; |
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| 406 | if (mv->stream_index >= avctx->nb_streams) |
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| 407 | mv->stream_index = 0; |
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| 408 | |||
| 409 | return 0; |
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| 410 | } |
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| 411 | |||
| 412 | static int mv_read_seek(AVFormatContext *avctx, int stream_index, int64_t timestamp, int flags) |
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| 413 | { |
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| 414 | MvContext *mv = avctx->priv_data; |
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| 415 | AVStream *st = avctx->streams[stream_index]; |
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| 416 | int frame, i; |
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| 417 | |||
| 418 | if ((flags & AVSEEK_FLAG_FRAME) || (flags & AVSEEK_FLAG_BYTE)) |
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| 419 | return AVERROR(ENOSYS); |
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| 420 | |||
| 421 | if (!avctx->pb->seekable) |
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| 422 | return AVERROR(EIO); |
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| 423 | |||
| 424 | frame = av_index_search_timestamp(st, timestamp, flags); |
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| 425 | if (frame < 0) |
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| 426 | return -1; |
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| 427 | |||
| 428 | for (i = 0; i < avctx->nb_streams; i++) |
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| 429 | mv->frame[i] = frame; |
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| 430 | return 0; |
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| 431 | } |
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| 432 | |||
| 433 | AVInputFormat ff_mv_demuxer = { |
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| 434 | .name = "mv", |
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| 435 | .long_name = NULL_IF_CONFIG_SMALL("Silicon Graphics Movie"), |
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| 436 | .priv_data_size = sizeof(MvContext), |
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| 437 | .read_probe = mv_probe, |
||
| 438 | .read_header = mv_read_header, |
||
| 439 | .read_packet = mv_read_packet, |
||
| 440 | .read_seek = mv_read_seek, |
||
| 441 | }; |