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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 | AVCodecContext * codec = avf->streams[i]->codec; | |
79 | int j; | |
80 | int fourcc = 0; | |
81 | int num, denom, ssize; | |
82 | ||
83 | s[i].type = codec->codec_type == AVMEDIA_TYPE_VIDEO ? NUT_VIDEO_CLASS : NUT_AUDIO_CLASS; | |
84 | ||
85 | if (codec->codec_tag) fourcc = codec->codec_tag; | |
86 | else fourcc = ff_codec_get_tag(nut_tags, codec->codec_id); | |
87 | ||
88 | if (!fourcc) { | |
89 | if (codec->codec_type == AVMEDIA_TYPE_VIDEO) fourcc = ff_codec_get_tag(ff_codec_bmp_tags, codec->codec_id); | |
90 | if (codec->codec_type == AVMEDIA_TYPE_AUDIO) fourcc = ff_codec_get_tag(ff_codec_wav_tags, codec->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(codec, &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 = codec->has_b_frames; | |
105 | s[i].codec_specific_len = codec->extradata_size; | |
106 | s[i].codec_specific = codec->extradata; | |
107 | ||
108 | if (codec->codec_type == AVMEDIA_TYPE_VIDEO) { | |
109 | s[i].width = codec->width; | |
110 | s[i].height = codec->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 = codec->sample_rate; | |
116 | s[i].samplerate_denom = 1; | |
117 | s[i].channel_count = codec->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, long long 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->codec->codec_tag |= s[i].fourcc[j]<<(j*8); | |
230 | ||
231 | st->codec->has_b_frames = s[i].decode_delay; | |
232 | ||
233 | st->codec->extradata_size = s[i].codec_specific_len; | |
234 | if (st->codec->extradata_size) { | |
235 | if(ff_alloc_extradata(st->codec, st->codec->extradata_size)){ | |
236 | nut_demuxer_uninit(nut); | |
237 | priv->nut = NULL; | |
238 | return AVERROR(ENOMEM); | |
239 | } | |
240 | memcpy(st->codec->extradata, s[i].codec_specific, st->codec->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->codec->codec_id = ff_codec_get_id(nut_tags, st->codec->codec_tag); | |
248 | ||
249 | switch(s[i].type) { | |
250 | case NUT_AUDIO_CLASS: | |
251 | st->codec->codec_type = AVMEDIA_TYPE_AUDIO; | |
252 | if (st->codec->codec_id == AV_CODEC_ID_NONE) st->codec->codec_id = ff_codec_get_id(ff_codec_wav_tags, st->codec->codec_tag); | |
253 | ||
254 | st->codec->channels = s[i].channel_count; | |
255 | st->codec->sample_rate = s[i].samplerate_num / s[i].samplerate_denom; | |
256 | break; | |
257 | case NUT_VIDEO_CLASS: | |
258 | st->codec->codec_type = AVMEDIA_TYPE_VIDEO; | |
259 | if (st->codec->codec_id == AV_CODEC_ID_NONE) st->codec->codec_id = ff_codec_get_id(ff_codec_bmp_tags, st->codec->codec_tag); | |
260 | ||
261 | st->codec->width = s[i].width; | |
262 | st->codec->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->codec->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 | }; |