blob: 26bb35483f722d856a1fbd8db7f382338666ffbe
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 | }; |
325 |