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| 1 | /* | | |
| 2 | * NUT (de)muxing via libnut | | |
| 3 | * copyright (c) 2006 Oded Shimon <ods15@ods15.dyndns.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 | * NUT demuxing and muxing via libnut. | | |
| 25 | * @author Oded Shimon <ods15@ods15.dyndns.org> | | |
| 26 | */ | | |
| 27 | | | |
| 28 | #include "avformat.h" | | |
| 29 | #include "internal.h" | | |
| 30 | #include "riff.h" | | |
| 31 | #include <libnut.h> | | |
| 32 | | | |
| 33 | #define ID_STRING "nut/multimedia container" | | |
| 34 | #define ID_LENGTH (strlen(ID_STRING) + 1) | | |
| 35 | | | |
| 36 | typedef struct { | | |
| 37 | nut_context_tt * nut; | | |
| 38 | nut_stream_header_tt * s; | | |
| 39 | } NUTContext; | | |
| 40 | | | |
| 41 | static const AVCodecTag nut_tags[] = { | | |
| 42 | { AV_CODEC_ID_MPEG4, MKTAG('m', 'p', '4', 'v') }, | | |
| 43 | { AV_CODEC_ID_MP3, MKTAG('m', 'p', '3', ' ') }, | | |
| 44 | { AV_CODEC_ID_VORBIS, MKTAG('v', 'r', 'b', 's') }, | | |
| 45 | { 0, 0 }, | | |
| 46 | }; | | |
| 47 | | | |
| 48 | #if CONFIG_LIBNUT_MUXER | | |
| 49 | static int av_write(void * h, size_t len, const uint8_t * buf) { | | |
| 50 | AVIOContext * bc = h; | | |
| 51 | avio_write(bc, buf, len); | | |
| 52 | //avio_flush(bc); | | |
| 53 | return len; | | |
| 54 | } | | |
| 55 | | | |
| 56 | static int nut_write_header(AVFormatContext * avf) { | | |
| 57 | NUTContext * priv = avf->priv_data; | | |
| 58 | AVIOContext * bc = avf->pb; | | |
| 59 | nut_muxer_opts_tt mopts = { | | |
| 60 | .output = { | | |
| 61 | .priv = bc, | | |
| 62 | .write = av_write, | | |
| 63 | }, | | |
| 64 | .alloc = { av_malloc, av_realloc, av_free }, | | |
| 65 | .write_index = 1, | | |
| 66 | .realtime_stream = 0, | | |
| 67 | .max_distance = 32768, | | |
| 68 | .fti = NULL, | | |
| 69 | }; | | |
| 70 | nut_stream_header_tt * s; | | |
| 71 | int i; | | |
| 72 | | | |
| 73 | priv->s = s = av_mallocz_array(avf->nb_streams + 1, sizeof*s); | | |
| 74 | if(!s) | | |
| 75 | return AVERROR(ENOMEM); | | |
| 76 | | | |
| 77 | for (i = 0; i < avf->nb_streams; i++) { | | |
| 78 | AVCodecParameters *par = avf->streams[i]->codecpar; | | |
| 79 | int j; | | |
| 80 | int fourcc = 0; | | |
| 81 | int num, denom, ssize; | | |
| 82 | | | |
| 83 | s[i].type = par->codec_type == AVMEDIA_TYPE_VIDEO ? NUT_VIDEO_CLASS : NUT_AUDIO_CLASS; | | |
| 84 | | | |
| 85 | if (par->codec_tag) fourcc = par->codec_tag; | | |
| 86 | else fourcc = ff_codec_get_tag(nut_tags, par->codec_id); | | |
| 87 | | | |
| 88 | if (!fourcc) { | | |
| 89 | if (par->codec_type == AVMEDIA_TYPE_VIDEO) fourcc = ff_codec_get_tag(ff_codec_bmp_tags, par->codec_id); | | |
| 90 | if (par->codec_type == AVMEDIA_TYPE_AUDIO) fourcc = ff_codec_get_tag(ff_codec_wav_tags, par->codec_id); | | |
| 91 | } | | |
| 92 | | | |
| 93 | s[i].fourcc_len = 4; | | |
| 94 | s[i].fourcc = av_malloc(s[i].fourcc_len); | | |
| 95 | for (j = 0; j < s[i].fourcc_len; j++) s[i].fourcc[j] = (fourcc >> (j*8)) & 0xFF; | | |
| 96 | | | |
| 97 | ff_parse_specific_params(avf->streams[i], &num, &ssize, &denom); | | |
| 98 | avpriv_set_pts_info(avf->streams[i], 60, denom, num); | | |
| 99 | | | |
| 100 | s[i].time_base.num = denom; | | |
| 101 | s[i].time_base.den = num; | | |
| 102 | | | |
| 103 | s[i].fixed_fps = 0; | | |
| 104 | s[i].decode_delay = par->video_delay; | | |
| 105 | s[i].codec_specific_len = par->extradata_size; | | |
| 106 | s[i].codec_specific = par->extradata; | | |
| 107 | | | |
| 108 | if (par->codec_type == AVMEDIA_TYPE_VIDEO) { | | |
| 109 | s[i].width = par->width; | | |
| 110 | s[i].height = par->height; | | |
| 111 | s[i].sample_width = 0; | | |
| 112 | s[i].sample_height = 0; | | |
| 113 | s[i].colorspace_type = 0; | | |
| 114 | } else { | | |
| 115 | s[i].samplerate_num = par->sample_rate; | | |
| 116 | s[i].samplerate_denom = 1; | | |
| 117 | s[i].channel_count = par->channels; | | |
| 118 | } | | |
| 119 | } | | |
| 120 | | | |
| 121 | s[avf->nb_streams].type = -1; | | |
| 122 | priv->nut = nut_muxer_init(&mopts, s, NULL); | | |
| 123 | | | |
| 124 | return 0; | | |
| 125 | } | | |
| 126 | | | |
| 127 | static int nut_write_packet(AVFormatContext * avf, AVPacket * pkt) { | | |
| 128 | NUTContext * priv = avf->priv_data; | | |
| 129 | nut_packet_tt p; | | |
| 130 | | | |
| 131 | p.len = pkt->size; | | |
| 132 | p.stream = pkt->stream_index; | | |
| 133 | p.pts = pkt->pts; | | |
| 134 | p.flags = pkt->flags & AV_PKT_FLAG_KEY ? NUT_FLAG_KEY : 0; | | |
| 135 | p.next_pts = 0; | | |
| 136 | | | |
| 137 | nut_write_frame_reorder(priv->nut, &p, pkt->data); | | |
| 138 | | | |
| 139 | return 0; | | |
| 140 | } | | |
| 141 | | | |
| 142 | static int nut_write_trailer(AVFormatContext * avf) { | | |
| 143 | AVIOContext * bc = avf->pb; | | |
| 144 | NUTContext * priv = avf->priv_data; | | |
| 145 | int i; | | |
| 146 | | | |
| 147 | nut_muxer_uninit_reorder(priv->nut); | | |
| 148 | avio_flush(bc); | | |
| 149 | | | |
| 150 | for(i = 0; priv->s[i].type != -1; i++ ) av_freep(&priv->s[i].fourcc); | | |
| 151 | av_freep(&priv->s); | | |
| 152 | | | |
| 153 | return 0; | | |
| 154 | } | | |
| 155 | | | |
| 156 | AVOutputFormat ff_libnut_muxer = { | | |
| 157 | .name = "libnut", | | |
| 158 | .long_name = "nut format", | | |
| 159 | .mime_type = "video/x-nut", | | |
| 160 | .extensions = "nut", | | |
| 161 | .priv_data_size = sizeof(NUTContext), | | |
| 162 | .audio_codec = AV_CODEC_ID_VORBIS, | | |
| 163 | .video_codec = AV_CODEC_ID_MPEG4, | | |
| 164 | .write_header = nut_write_header, | | |
| 165 | .write_packet = nut_write_packet, | | |
| 166 | .write_trailer = nut_write_trailer, | | |
| 167 | .flags = AVFMT_GLOBALHEADER, | | |
| 168 | }; | | |
| 169 | #endif /* CONFIG_LIBNUT_MUXER */ | | |
| 170 | | | |
| 171 | static int nut_probe(AVProbeData *p) { | | |
| 172 | if (!memcmp(p->buf, ID_STRING, ID_LENGTH)) return AVPROBE_SCORE_MAX; | | |
| 173 | | | |
| 174 | return 0; | | |
| 175 | } | | |
| 176 | | | |
| 177 | static size_t av_read(void * h, size_t len, uint8_t * buf) { | | |
| 178 | AVIOContext * bc = h; | | |
| 179 | return avio_read(bc, buf, len); | | |
| 180 | } | | |
| 181 | | | |
| 182 | static off_t av_seek(void * h, int64_t pos, int whence) { | | |
| 183 | AVIOContext * bc = h; | | |
| 184 | if (whence == SEEK_END) { | | |
| 185 | pos = avio_size(bc) + pos; | | |
| 186 | whence = SEEK_SET; | | |
| 187 | } | | |
| 188 | return avio_seek(bc, pos, whence); | | |
| 189 | } | | |
| 190 | | | |
| 191 | static int nut_read_header(AVFormatContext * avf) { | | |
| 192 | NUTContext * priv = avf->priv_data; | | |
| 193 | AVIOContext * bc = avf->pb; | | |
| 194 | nut_demuxer_opts_tt dopts = { | | |
| 195 | .input = { | | |
| 196 | .priv = bc, | | |
| 197 | .seek = av_seek, | | |
| 198 | .read = av_read, | | |
| 199 | .eof = NULL, | | |
| 200 | .file_pos = 0, | | |
| 201 | }, | | |
| 202 | .alloc = { av_malloc, av_realloc, av_free }, | | |
| 203 | .read_index = 1, | | |
| 204 | .cache_syncpoints = 1, | | |
| 205 | }; | | |
| 206 | nut_context_tt * nut = priv->nut = nut_demuxer_init(&dopts); | | |
| 207 | nut_stream_header_tt * s; | | |
| 208 | int ret, i; | | |
| 209 | | | |
| 210 | if(!nut) | | |
| 211 | return -1; | | |
| 212 | | | |
| 213 | if ((ret = nut_read_headers(nut, &s, NULL))) { | | |
| 214 | av_log(avf, AV_LOG_ERROR, " NUT error: %s\n", nut_error(ret)); | | |
| 215 | nut_demuxer_uninit(nut); | | |
| 216 | priv->nut = NULL; | | |
| 217 | return -1; | | |
| 218 | } | | |
| 219 | | | |
| 220 | priv->s = s; | | |
| 221 | | | |
| 222 | for (i = 0; s[i].type != -1 && i < 2; i++) { | | |
| 223 | AVStream * st = avformat_new_stream(avf, NULL); | | |
| 224 | int j; | | |
| 225 | | | |
| 226 | if (!st) | | |
| 227 | return AVERROR(ENOMEM); | | |
| 228 | | | |
| 229 | for (j = 0; j < s[i].fourcc_len && j < 8; j++) st->codecpar->codec_tag |= s[i].fourcc[j]<<(j*8); | | |
| 230 | | | |
| 231 | st->codecpar->video_delay = s[i].decode_delay; | | |
| 232 | | | |
| 233 | st->codecpar->extradata_size = s[i].codec_specific_len; | | |
| 234 | if (st->codecpar->extradata_size) { | | |
| 235 | if(ff_alloc_extradata(st->codecpar, st->codecpar->extradata_size)){ | | |
| 236 | nut_demuxer_uninit(nut); | | |
| 237 | priv->nut = NULL; | | |
| 238 | return AVERROR(ENOMEM); | | |
| 239 | } | | |
| 240 | memcpy(st->codecpar->extradata, s[i].codec_specific, st->codecpar->extradata_size); | | |
| 241 | } | | |
| 242 | | | |
| 243 | avpriv_set_pts_info(avf->streams[i], 60, s[i].time_base.num, s[i].time_base.den); | | |
| 244 | st->start_time = 0; | | |
| 245 | st->duration = s[i].max_pts; | | |
| 246 | | | |
| 247 | st->codecpar->codec_id = ff_codec_get_id(nut_tags, st->codecpar->codec_tag); | | |
| 248 | | | |
| 249 | switch(s[i].type) { | | |
| 250 | case NUT_AUDIO_CLASS: | | |
| 251 | st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO; | | |
| 252 | if (st->codecpar->codec_id == AV_CODEC_ID_NONE) st->codecpar->codec_id = ff_codec_get_id(ff_codec_wav_tags, st->codecpar->codec_tag); | | |
| 253 | | | |
| 254 | st->codecpar->channels = s[i].channel_count; | | |
| 255 | st->codecpar->sample_rate = s[i].samplerate_num / s[i].samplerate_denom; | | |
| 256 | break; | | |
| 257 | case NUT_VIDEO_CLASS: | | |
| 258 | st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO; | | |
| 259 | if (st->codecpar->codec_id == AV_CODEC_ID_NONE) st->codecpar->codec_id = ff_codec_get_id(ff_codec_bmp_tags, st->codecpar->codec_tag); | | |
| 260 | | | |
| 261 | st->codecpar->width = s[i].width; | | |
| 262 | st->codecpar->height = s[i].height; | | |
| 263 | st->sample_aspect_ratio.num = s[i].sample_width; | | |
| 264 | st->sample_aspect_ratio.den = s[i].sample_height; | | |
| 265 | break; | | |
| 266 | } | | |
| 267 | if (st->codecpar->codec_id == AV_CODEC_ID_NONE) av_log(avf, AV_LOG_ERROR, "Unknown codec?!\n"); | | |
| 268 | } | | |
| 269 | | | |
| 270 | return 0; | | |
| 271 | } | | |
| 272 | | | |
| 273 | static int nut_read_packet(AVFormatContext * avf, AVPacket * pkt) { | | |
| 274 | NUTContext * priv = avf->priv_data; | | |
| 275 | nut_packet_tt pd; | | |
| 276 | int ret; | | |
| 277 | | | |
| 278 | ret = nut_read_next_packet(priv->nut, &pd); | | |
| 279 | | | |
| 280 | if (ret || av_new_packet(pkt, pd.len) < 0) { | | |
| 281 | if (ret != NUT_ERR_EOF) | | |
| 282 | av_log(avf, AV_LOG_ERROR, " NUT error: %s\n", nut_error(ret)); | | |
| 283 | return -1; | | |
| 284 | } | | |
| 285 | | | |
| 286 | if (pd.flags & NUT_FLAG_KEY) pkt->flags |= AV_PKT_FLAG_KEY; | | |
| 287 | pkt->pts = pd.pts; | | |
| 288 | pkt->stream_index = pd.stream; | | |
| 289 | pkt->pos = avio_tell(avf->pb); | | |
| 290 | | | |
| 291 | ret = nut_read_frame(priv->nut, &pd.len, pkt->data); | | |
| 292 | | | |
| 293 | return ret; | | |
| 294 | } | | |
| 295 | | | |
| 296 | static int nut_read_seek(AVFormatContext * avf, int stream_index, int64_t target_ts, int flags) { | | |
| 297 | NUTContext * priv = avf->priv_data; | | |
| 298 | int active_streams[] = { stream_index, -1 }; | | |
| 299 | double time_pos = target_ts * priv->s[stream_index].time_base.num / (double)priv->s[stream_index].time_base.den; | | |
| 300 | | | |
| 301 | if (nut_seek(priv->nut, time_pos, 2*!(flags & AVSEEK_FLAG_BACKWARD), active_streams)) return -1; | | |
| 302 | | | |
| 303 | return 0; | | |
| 304 | } | | |
| 305 | | | |
| 306 | static int nut_read_close(AVFormatContext *s) { | | |
| 307 | NUTContext * priv = s->priv_data; | | |
| 308 | | | |
| 309 | nut_demuxer_uninit(priv->nut); | | |
| 310 | | | |
| 311 | return 0; | | |
| 312 | } | | |
| 313 | | | |
| 314 | AVInputFormat ff_libnut_demuxer = { | | |
| 315 | .name = "libnut", | | |
| 316 | .long_name = NULL_IF_CONFIG_SMALL("NUT format"), | | |
| 317 | .priv_data_size = sizeof(NUTContext), | | |
| 318 | .read_probe = nut_probe, | | |
| 319 | .read_header = nut_read_header, | | |
| 320 | .read_packet = nut_read_packet, | | |
| 321 | .read_close = nut_read_close, | | |
| 322 | .read_seek = nut_read_seek, | | |
| 323 | .extensions = "nut", | | |
| 324 | }; | | |