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1 | /* |
2 | * nut muxer | |
3 | * Copyright (c) 2004-2007 Michael Niedermayer | |
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 | #include <stdint.h> | |
23 | ||
24 | #include "libavutil/intreadwrite.h" | |
25 | #include "libavutil/mathematics.h" | |
26 | #include "libavutil/tree.h" | |
27 | #include "libavutil/dict.h" | |
28 | #include "libavutil/avassert.h" | |
29 | #include "libavutil/time.h" | |
30 | #include "libavutil/opt.h" | |
31 | #include "libavcodec/bytestream.h" | |
32 | #include "libavcodec/mpegaudiodata.h" | |
33 | #include "nut.h" | |
34 | #include "internal.h" | |
35 | #include "avio_internal.h" | |
36 | #include "riff.h" | |
37 | ||
38 | static int find_expected_header(AVCodecContext *c, int size, int key_frame, | |
39 | uint8_t out[64]) | |
40 | { | |
41 | int sample_rate = c->sample_rate; | |
42 | ||
43 | if (size > 4096) | |
44 | return 0; | |
45 | ||
46 | AV_WB24(out, 1); | |
47 | ||
48 | if (c->codec_id == AV_CODEC_ID_MPEG4) { | |
49 | if (key_frame) { | |
50 | return 3; | |
51 | } else { | |
52 | out[3] = 0xB6; | |
53 | return 4; | |
54 | } | |
55 | } else if (c->codec_id == AV_CODEC_ID_MPEG1VIDEO || | |
56 | c->codec_id == AV_CODEC_ID_MPEG2VIDEO) { | |
57 | return 3; | |
58 | } else if (c->codec_id == AV_CODEC_ID_H264) { | |
59 | return 3; | |
60 | } else if (c->codec_id == AV_CODEC_ID_MP3 || | |
61 | c->codec_id == AV_CODEC_ID_MP2) { | |
62 | int lsf, mpeg25, sample_rate_index, bitrate_index, frame_size; | |
63 | int layer = c->codec_id == AV_CODEC_ID_MP3 ? 3 : 2; | |
64 | unsigned int header = 0xFFF00000; | |
65 | ||
66 | lsf = sample_rate < (24000 + 32000) / 2; | |
67 | mpeg25 = sample_rate < (12000 + 16000) / 2; | |
68 | sample_rate <<= lsf + mpeg25; | |
69 | if (sample_rate < (32000 + 44100) / 2) sample_rate_index = 2; | |
70 | else if (sample_rate < (44100 + 48000) / 2) sample_rate_index = 0; | |
71 | else sample_rate_index = 1; | |
72 | ||
73 | sample_rate = avpriv_mpa_freq_tab[sample_rate_index] >> (lsf + mpeg25); | |
74 | ||
75 | for (bitrate_index = 2; bitrate_index < 30; bitrate_index++) { | |
76 | frame_size = | |
77 | avpriv_mpa_bitrate_tab[lsf][layer - 1][bitrate_index >> 1]; | |
78 | frame_size = (frame_size * 144000) / (sample_rate << lsf) + | |
79 | (bitrate_index & 1); | |
80 | ||
81 | if (frame_size == size) | |
82 | break; | |
83 | } | |
84 | ||
85 | header |= (!lsf) << 19; | |
86 | header |= (4 - layer) << 17; | |
87 | header |= 1 << 16; //no crc | |
88 | AV_WB32(out, header); | |
89 | if (size <= 0) | |
90 | return 2; //we guess there is no crc, if there is one the user clearly does not care about overhead | |
91 | if (bitrate_index == 30) | |
92 | return -1; //something is wrong ... | |
93 | ||
94 | header |= (bitrate_index >> 1) << 12; | |
95 | header |= sample_rate_index << 10; | |
96 | header |= (bitrate_index & 1) << 9; | |
97 | ||
98 | return 2; //FIXME actually put the needed ones in build_elision_headers() | |
99 | //return 3; //we guess that the private bit is not set | |
100 | //FIXME the above assumptions should be checked, if these turn out false too often something should be done | |
101 | } | |
102 | return 0; | |
103 | } | |
104 | ||
105 | static int find_header_idx(AVFormatContext *s, AVCodecContext *c, int size, int frame_type) | |
106 | { | |
107 | NUTContext *nut = s->priv_data; | |
108 | uint8_t out[64]; | |
109 | int i; | |
110 | int len = find_expected_header(c, size, frame_type, out); | |
111 | ||
112 | for (i = 1; i < nut->header_count; i++) { | |
113 | if (len == nut->header_len[i] && !memcmp(out, nut->header[i], len)) { | |
114 | return i; | |
115 | } | |
116 | } | |
117 | ||
118 | return 0; | |
119 | } | |
120 | ||
121 | static void build_elision_headers(AVFormatContext *s) | |
122 | { | |
123 | NUTContext *nut = s->priv_data; | |
124 | int i; | |
125 | //FIXME this is lame | |
126 | //FIXME write a 2pass mode to find the maximal headers | |
127 | static const uint8_t headers[][5] = { | |
128 | { 3, 0x00, 0x00, 0x01 }, | |
129 | { 4, 0x00, 0x00, 0x01, 0xB6}, | |
130 | { 2, 0xFF, 0xFA }, //mp3+crc | |
131 | { 2, 0xFF, 0xFB }, //mp3 | |
132 | { 2, 0xFF, 0xFC }, //mp2+crc | |
133 | { 2, 0xFF, 0xFD }, //mp2 | |
134 | }; | |
135 | ||
136 | nut->header_count = 7; | |
137 | for (i = 1; i < nut->header_count; i++) { | |
138 | nut->header_len[i] = headers[i - 1][0]; | |
139 | nut->header[i] = &headers[i - 1][1]; | |
140 | } | |
141 | } | |
142 | ||
143 | static void build_frame_code(AVFormatContext *s) | |
144 | { | |
145 | NUTContext *nut = s->priv_data; | |
146 | int key_frame, index, pred, stream_id; | |
147 | int start = 1; | |
148 | int end = 254; | |
149 | int keyframe_0_esc = s->nb_streams > 2; | |
150 | int pred_table[10]; | |
151 | FrameCode *ft; | |
152 | ||
153 | ft = &nut->frame_code[start]; | |
154 | ft->flags = FLAG_CODED; | |
155 | ft->size_mul = 1; | |
156 | ft->pts_delta = 1; | |
157 | start++; | |
158 | ||
159 | if (keyframe_0_esc) { | |
160 | /* keyframe = 0 escape */ | |
161 | FrameCode *ft = &nut->frame_code[start]; | |
162 | ft->flags = FLAG_STREAM_ID | FLAG_SIZE_MSB | FLAG_CODED_PTS; | |
163 | ft->size_mul = 1; | |
164 | start++; | |
165 | } | |
166 | ||
167 | for (stream_id = 0; stream_id < s->nb_streams; stream_id++) { | |
168 | int start2 = start + (end - start) * stream_id / s->nb_streams; | |
169 | int end2 = start + (end - start) * (stream_id + 1) / s->nb_streams; | |
170 | AVCodecContext *codec = s->streams[stream_id]->codec; | |
171 | int is_audio = codec->codec_type == AVMEDIA_TYPE_AUDIO; | |
172 | int intra_only = /*codec->intra_only || */ is_audio; | |
173 | int pred_count; | |
174 | int frame_size = 0; | |
175 | ||
176 | if (codec->codec_type == AVMEDIA_TYPE_AUDIO) { | |
177 | frame_size = av_get_audio_frame_duration(codec, 0); | |
178 | if (codec->codec_id == AV_CODEC_ID_VORBIS && !frame_size) | |
179 | frame_size = 64; | |
180 | } else { | |
181 | AVRational f = av_div_q(codec->time_base, *nut->stream[stream_id].time_base); | |
182 | if (f.den == 1 && f.num>0) | |
183 | frame_size = f.num; | |
184 | } | |
185 | if (!frame_size) | |
186 | frame_size = 1; | |
187 | ||
188 | for (key_frame = 0; key_frame < 2; key_frame++) { | |
189 | if (!intra_only || !keyframe_0_esc || key_frame != 0) { | |
190 | FrameCode *ft = &nut->frame_code[start2]; | |
191 | ft->flags = FLAG_KEY * key_frame; | |
192 | ft->flags |= FLAG_SIZE_MSB | FLAG_CODED_PTS; | |
193 | ft->stream_id = stream_id; | |
194 | ft->size_mul = 1; | |
195 | if (is_audio) | |
196 | ft->header_idx = find_header_idx(s, codec, -1, key_frame); | |
197 | start2++; | |
198 | } | |
199 | } | |
200 | ||
201 | key_frame = intra_only; | |
202 | #if 1 | |
203 | if (is_audio) { | |
204 | int frame_bytes = codec->frame_size * (int64_t)codec->bit_rate / | |
205 | (8 * codec->sample_rate); | |
206 | int pts; | |
207 | for (pts = 0; pts < 2; pts++) { | |
208 | for (pred = 0; pred < 2; pred++) { | |
209 | FrameCode *ft = &nut->frame_code[start2]; | |
210 | ft->flags = FLAG_KEY * key_frame; | |
211 | ft->stream_id = stream_id; | |
212 | ft->size_mul = frame_bytes + 2; | |
213 | ft->size_lsb = frame_bytes + pred; | |
214 | ft->pts_delta = pts * frame_size; | |
215 | ft->header_idx = find_header_idx(s, codec, frame_bytes + pred, key_frame); | |
216 | start2++; | |
217 | } | |
218 | } | |
219 | } else { | |
220 | FrameCode *ft = &nut->frame_code[start2]; | |
221 | ft->flags = FLAG_KEY | FLAG_SIZE_MSB; | |
222 | ft->stream_id = stream_id; | |
223 | ft->size_mul = 1; | |
224 | ft->pts_delta = frame_size; | |
225 | start2++; | |
226 | } | |
227 | #endif | |
228 | ||
229 | if (codec->has_b_frames) { | |
230 | pred_count = 5; | |
231 | pred_table[0] = -2; | |
232 | pred_table[1] = -1; | |
233 | pred_table[2] = 1; | |
234 | pred_table[3] = 3; | |
235 | pred_table[4] = 4; | |
236 | } else if (codec->codec_id == AV_CODEC_ID_VORBIS) { | |
237 | pred_count = 3; | |
238 | pred_table[0] = 2; | |
239 | pred_table[1] = 9; | |
240 | pred_table[2] = 16; | |
241 | } else { | |
242 | pred_count = 1; | |
243 | pred_table[0] = 1; | |
244 | } | |
245 | ||
246 | for (pred = 0; pred < pred_count; pred++) { | |
247 | int start3 = start2 + (end2 - start2) * pred / pred_count; | |
248 | int end3 = start2 + (end2 - start2) * (pred + 1) / pred_count; | |
249 | ||
250 | pred_table[pred] *= frame_size; | |
251 | ||
252 | for (index = start3; index < end3; index++) { | |
253 | FrameCode *ft = &nut->frame_code[index]; | |
254 | ft->flags = FLAG_KEY * key_frame; | |
255 | ft->flags |= FLAG_SIZE_MSB; | |
256 | ft->stream_id = stream_id; | |
257 | //FIXME use single byte size and pred from last | |
258 | ft->size_mul = end3 - start3; | |
259 | ft->size_lsb = index - start3; | |
260 | ft->pts_delta = pred_table[pred]; | |
261 | if (is_audio) | |
262 | ft->header_idx = find_header_idx(s, codec, -1, key_frame); | |
263 | } | |
264 | } | |
265 | } | |
266 | memmove(&nut->frame_code['N' + 1], &nut->frame_code['N'], sizeof(FrameCode) * (255 - 'N')); | |
267 | nut->frame_code[0].flags = | |
268 | nut->frame_code[255].flags = | |
269 | nut->frame_code['N'].flags = FLAG_INVALID; | |
270 | } | |
271 | ||
272 | static void put_tt(NUTContext *nut, AVRational *time_base, AVIOContext *bc, uint64_t val) | |
273 | { | |
274 | val *= nut->time_base_count; | |
275 | val += time_base - nut->time_base; | |
276 | ff_put_v(bc, val); | |
277 | } | |
278 | /** | |
279 | * Store a string as vb. | |
280 | */ | |
281 | static void put_str(AVIOContext *bc, const char *string) | |
282 | { | |
283 | int len = strlen(string); | |
284 | ||
285 | ff_put_v(bc, len); | |
286 | avio_write(bc, string, len); | |
287 | } | |
288 | ||
289 | static void put_s(AVIOContext *bc, int64_t val) | |
290 | { | |
291 | ff_put_v(bc, 2 * FFABS(val) - (val > 0)); | |
292 | } | |
293 | ||
294 | #ifdef TRACE | |
295 | static inline void ff_put_v_trace(AVIOContext *bc, uint64_t v, const char *file, | |
296 | const char *func, int line) | |
297 | { | |
298 | av_log(NULL, AV_LOG_DEBUG, "ff_put_v %5"PRId64" / %"PRIX64" in %s %s:%d\n", v, v, file, func, line); | |
299 | ||
300 | ff_put_v(bc, v); | |
301 | } | |
302 | ||
303 | static inline void put_s_trace(AVIOContext *bc, int64_t v, const char *file, const char *func, int line) | |
304 | { | |
305 | av_log(NULL, AV_LOG_DEBUG, "put_s %5"PRId64" / %"PRIX64" in %s %s:%d\n", v, v, file, func, line); | |
306 | ||
307 | put_s(bc, v); | |
308 | } | |
309 | #define ff_put_v(bc, v) ff_put_v_trace(bc, v, __FILE__, __PRETTY_FUNCTION__, __LINE__) | |
310 | #define put_s(bc, v) put_s_trace(bc, v, __FILE__, __PRETTY_FUNCTION__, __LINE__) | |
311 | #endif | |
312 | ||
313 | //FIXME remove calculate_checksum | |
314 | static void put_packet(NUTContext *nut, AVIOContext *bc, AVIOContext *dyn_bc, | |
315 | int calculate_checksum, uint64_t startcode) | |
316 | { | |
317 | uint8_t *dyn_buf = NULL; | |
318 | int dyn_size = avio_close_dyn_buf(dyn_bc, &dyn_buf); | |
319 | int forw_ptr = dyn_size + 4 * calculate_checksum; | |
320 | ||
321 | if (forw_ptr > 4096) | |
322 | ffio_init_checksum(bc, ff_crc04C11DB7_update, 0); | |
323 | avio_wb64(bc, startcode); | |
324 | ff_put_v(bc, forw_ptr); | |
325 | if (forw_ptr > 4096) | |
326 | avio_wl32(bc, ffio_get_checksum(bc)); | |
327 | ||
328 | if (calculate_checksum) | |
329 | ffio_init_checksum(bc, ff_crc04C11DB7_update, 0); | |
330 | avio_write(bc, dyn_buf, dyn_size); | |
331 | if (calculate_checksum) | |
332 | avio_wl32(bc, ffio_get_checksum(bc)); | |
333 | ||
334 | av_free(dyn_buf); | |
335 | } | |
336 | ||
337 | static void write_mainheader(NUTContext *nut, AVIOContext *bc) | |
338 | { | |
339 | int i, j, tmp_pts, tmp_flags, tmp_stream, tmp_mul, tmp_size, tmp_fields, | |
340 | tmp_head_idx; | |
341 | int64_t tmp_match; | |
342 | ||
343 | ff_put_v(bc, nut->version); | |
344 | if (nut->version > 3) | |
345 | ff_put_v(bc, nut->minor_version = 1); | |
346 | ff_put_v(bc, nut->avf->nb_streams); | |
347 | ff_put_v(bc, nut->max_distance); | |
348 | ff_put_v(bc, nut->time_base_count); | |
349 | ||
350 | for (i = 0; i < nut->time_base_count; i++) { | |
351 | ff_put_v(bc, nut->time_base[i].num); | |
352 | ff_put_v(bc, nut->time_base[i].den); | |
353 | } | |
354 | ||
355 | tmp_pts = 0; | |
356 | tmp_mul = 1; | |
357 | tmp_stream = 0; | |
358 | tmp_match = 1 - (1LL << 62); | |
359 | tmp_head_idx = 0; | |
360 | for (i = 0; i < 256; ) { | |
361 | tmp_fields = 0; | |
362 | tmp_size = 0; | |
363 | // tmp_res=0; | |
364 | if (tmp_pts != nut->frame_code[i].pts_delta ) tmp_fields = 1; | |
365 | if (tmp_mul != nut->frame_code[i].size_mul ) tmp_fields = 2; | |
366 | if (tmp_stream != nut->frame_code[i].stream_id ) tmp_fields = 3; | |
367 | if (tmp_size != nut->frame_code[i].size_lsb ) tmp_fields = 4; | |
368 | // if (tmp_res != nut->frame_code[i].res ) tmp_fields=5; | |
369 | if (tmp_head_idx != nut->frame_code[i].header_idx) tmp_fields = 8; | |
370 | ||
371 | tmp_pts = nut->frame_code[i].pts_delta; | |
372 | tmp_flags = nut->frame_code[i].flags; | |
373 | tmp_stream = nut->frame_code[i].stream_id; | |
374 | tmp_mul = nut->frame_code[i].size_mul; | |
375 | tmp_size = nut->frame_code[i].size_lsb; | |
376 | // tmp_res = nut->frame_code[i].res; | |
377 | tmp_head_idx = nut->frame_code[i].header_idx; | |
378 | ||
379 | for (j = 0; i < 256; j++, i++) { | |
380 | if (i == 'N') { | |
381 | j--; | |
382 | continue; | |
383 | } | |
384 | if (nut->frame_code[i].pts_delta != tmp_pts || | |
385 | nut->frame_code[i].flags != tmp_flags || | |
386 | nut->frame_code[i].stream_id != tmp_stream || | |
387 | nut->frame_code[i].size_mul != tmp_mul || | |
388 | nut->frame_code[i].size_lsb != tmp_size + j || | |
389 | // nut->frame_code[i].res != tmp_res || | |
390 | nut->frame_code[i].header_idx != tmp_head_idx) | |
391 | break; | |
392 | } | |
393 | if (j != tmp_mul - tmp_size) | |
394 | tmp_fields = 6; | |
395 | ||
396 | ff_put_v(bc, tmp_flags); | |
397 | ff_put_v(bc, tmp_fields); | |
398 | if (tmp_fields > 0) put_s(bc, tmp_pts); | |
399 | if (tmp_fields > 1) ff_put_v(bc, tmp_mul); | |
400 | if (tmp_fields > 2) ff_put_v(bc, tmp_stream); | |
401 | if (tmp_fields > 3) ff_put_v(bc, tmp_size); | |
402 | if (tmp_fields > 4) ff_put_v(bc, 0 /*tmp_res*/); | |
403 | if (tmp_fields > 5) ff_put_v(bc, j); | |
404 | if (tmp_fields > 6) ff_put_v(bc, tmp_match); | |
405 | if (tmp_fields > 7) ff_put_v(bc, tmp_head_idx); | |
406 | } | |
407 | ff_put_v(bc, nut->header_count - 1); | |
408 | for (i = 1; i < nut->header_count; i++) { | |
409 | ff_put_v(bc, nut->header_len[i]); | |
410 | avio_write(bc, nut->header[i], nut->header_len[i]); | |
411 | } | |
412 | // flags had been effectively introduced in version 4 | |
413 | if (nut->version > 3) | |
414 | ff_put_v(bc, nut->flags); | |
415 | } | |
416 | ||
417 | static int write_streamheader(AVFormatContext *avctx, AVIOContext *bc, | |
418 | AVStream *st, int i) | |
419 | { | |
420 | NUTContext *nut = avctx->priv_data; | |
421 | AVCodecContext *codec = st->codec; | |
422 | ||
423 | ff_put_v(bc, i); | |
424 | switch (codec->codec_type) { | |
425 | case AVMEDIA_TYPE_VIDEO: ff_put_v(bc, 0); break; | |
426 | case AVMEDIA_TYPE_AUDIO: ff_put_v(bc, 1); break; | |
427 | case AVMEDIA_TYPE_SUBTITLE: ff_put_v(bc, 2); break; | |
428 | default: ff_put_v(bc, 3); break; | |
429 | } | |
430 | ff_put_v(bc, 4); | |
431 | if (codec->codec_tag) { | |
432 | avio_wl32(bc, codec->codec_tag); | |
433 | } else { | |
434 | av_log(avctx, AV_LOG_ERROR, "No codec tag defined for stream %d\n", i); | |
435 | return AVERROR(EINVAL); | |
436 | } | |
437 | ||
438 | ff_put_v(bc, nut->stream[i].time_base - nut->time_base); | |
439 | ff_put_v(bc, nut->stream[i].msb_pts_shift); | |
440 | ff_put_v(bc, nut->stream[i].max_pts_distance); | |
441 | ff_put_v(bc, codec->has_b_frames); | |
442 | avio_w8(bc, 0); /* flags: 0x1 - fixed_fps, 0x2 - index_present */ | |
443 | ||
444 | ff_put_v(bc, codec->extradata_size); | |
445 | avio_write(bc, codec->extradata, codec->extradata_size); | |
446 | ||
447 | switch (codec->codec_type) { | |
448 | case AVMEDIA_TYPE_AUDIO: | |
449 | ff_put_v(bc, codec->sample_rate); | |
450 | ff_put_v(bc, 1); | |
451 | ff_put_v(bc, codec->channels); | |
452 | break; | |
453 | case AVMEDIA_TYPE_VIDEO: | |
454 | ff_put_v(bc, codec->width); | |
455 | ff_put_v(bc, codec->height); | |
456 | ||
457 | if (st->sample_aspect_ratio.num <= 0 || | |
458 | st->sample_aspect_ratio.den <= 0) { | |
459 | ff_put_v(bc, 0); | |
460 | ff_put_v(bc, 0); | |
461 | } else { | |
462 | ff_put_v(bc, st->sample_aspect_ratio.num); | |
463 | ff_put_v(bc, st->sample_aspect_ratio.den); | |
464 | } | |
465 | ff_put_v(bc, 0); /* csp type -- unknown */ | |
466 | break; | |
467 | default: | |
468 | break; | |
469 | } | |
470 | return 0; | |
471 | } | |
472 | ||
473 | static int add_info(AVIOContext *bc, const char *type, const char *value) | |
474 | { | |
475 | put_str(bc, type); | |
476 | put_s(bc, -1); | |
477 | put_str(bc, value); | |
478 | return 1; | |
479 | } | |
480 | ||
481 | static int write_globalinfo(NUTContext *nut, AVIOContext *bc) | |
482 | { | |
483 | AVFormatContext *s = nut->avf; | |
484 | AVDictionaryEntry *t = NULL; | |
485 | AVIOContext *dyn_bc; | |
486 | uint8_t *dyn_buf = NULL; | |
487 | int count = 0, dyn_size; | |
488 | int ret = avio_open_dyn_buf(&dyn_bc); | |
489 | if (ret < 0) | |
490 | return ret; | |
491 | ||
492 | while ((t = av_dict_get(s->metadata, "", t, AV_DICT_IGNORE_SUFFIX))) | |
493 | count += add_info(dyn_bc, t->key, t->value); | |
494 | ||
495 | ff_put_v(bc, 0); //stream_if_plus1 | |
496 | ff_put_v(bc, 0); //chapter_id | |
497 | ff_put_v(bc, 0); //timestamp_start | |
498 | ff_put_v(bc, 0); //length | |
499 | ||
500 | ff_put_v(bc, count); | |
501 | ||
502 | dyn_size = avio_close_dyn_buf(dyn_bc, &dyn_buf); | |
503 | avio_write(bc, dyn_buf, dyn_size); | |
504 | av_free(dyn_buf); | |
505 | return 0; | |
506 | } | |
507 | ||
508 | static int write_streaminfo(NUTContext *nut, AVIOContext *bc, int stream_id) { | |
509 | AVFormatContext *s= nut->avf; | |
510 | AVStream* st = s->streams[stream_id]; | |
511 | AVDictionaryEntry *t = NULL; | |
512 | AVIOContext *dyn_bc; | |
513 | uint8_t *dyn_buf=NULL; | |
514 | int count=0, dyn_size, i; | |
515 | int ret = avio_open_dyn_buf(&dyn_bc); | |
516 | if (ret < 0) | |
517 | return ret; | |
518 | ||
519 | while ((t = av_dict_get(st->metadata, "", t, AV_DICT_IGNORE_SUFFIX))) | |
520 | count += add_info(dyn_bc, t->key, t->value); | |
521 | for (i=0; ff_nut_dispositions[i].flag; ++i) { | |
522 | if (st->disposition & ff_nut_dispositions[i].flag) | |
523 | count += add_info(dyn_bc, "Disposition", ff_nut_dispositions[i].str); | |
524 | } | |
525 | if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) { | |
526 | uint8_t buf[256]; | |
527 | snprintf(buf, sizeof(buf), "%d/%d", st->codec->time_base.den, st->codec->time_base.num); | |
528 | count += add_info(dyn_bc, "r_frame_rate", buf); | |
529 | } | |
530 | dyn_size = avio_close_dyn_buf(dyn_bc, &dyn_buf); | |
531 | ||
532 | if (count) { | |
533 | ff_put_v(bc, stream_id + 1); //stream_id_plus1 | |
534 | ff_put_v(bc, 0); //chapter_id | |
535 | ff_put_v(bc, 0); //timestamp_start | |
536 | ff_put_v(bc, 0); //length | |
537 | ||
538 | ff_put_v(bc, count); | |
539 | ||
540 | avio_write(bc, dyn_buf, dyn_size); | |
541 | } | |
542 | ||
543 | av_free(dyn_buf); | |
544 | return count; | |
545 | } | |
546 | ||
547 | static int write_chapter(NUTContext *nut, AVIOContext *bc, int id) | |
548 | { | |
549 | AVIOContext *dyn_bc; | |
550 | uint8_t *dyn_buf = NULL; | |
551 | AVDictionaryEntry *t = NULL; | |
552 | AVChapter *ch = nut->avf->chapters[id]; | |
553 | int ret, dyn_size, count = 0; | |
554 | ||
555 | ret = avio_open_dyn_buf(&dyn_bc); | |
556 | if (ret < 0) | |
557 | return ret; | |
558 | ||
559 | ff_put_v(bc, 0); // stream_id_plus1 | |
560 | put_s(bc, id + 1); // chapter_id | |
561 | put_tt(nut, nut->chapter[id].time_base, bc, ch->start); // chapter_start | |
562 | ff_put_v(bc, ch->end - ch->start); // chapter_len | |
563 | ||
564 | while ((t = av_dict_get(ch->metadata, "", t, AV_DICT_IGNORE_SUFFIX))) | |
565 | count += add_info(dyn_bc, t->key, t->value); | |
566 | ||
567 | ff_put_v(bc, count); | |
568 | ||
569 | dyn_size = avio_close_dyn_buf(dyn_bc, &dyn_buf); | |
570 | avio_write(bc, dyn_buf, dyn_size); | |
571 | av_freep(&dyn_buf); | |
572 | return 0; | |
573 | } | |
574 | ||
575 | static int write_index(NUTContext *nut, AVIOContext *bc) { | |
576 | int i; | |
577 | Syncpoint dummy= { .pos= 0 }; | |
578 | Syncpoint *next_node[2] = { NULL }; | |
579 | int64_t startpos = avio_tell(bc); | |
580 | int64_t payload_size; | |
581 | ||
582 | put_tt(nut, nut->max_pts_tb, bc, nut->max_pts); | |
583 | ||
584 | ff_put_v(bc, nut->sp_count); | |
585 | ||
586 | for (i=0; i<nut->sp_count; i++) { | |
587 | av_tree_find(nut->syncpoints, &dummy, (void *) ff_nut_sp_pos_cmp, (void**)next_node); | |
588 | ff_put_v(bc, (next_node[1]->pos >> 4) - (dummy.pos>>4)); | |
589 | dummy.pos = next_node[1]->pos; | |
590 | } | |
591 | ||
592 | for (i=0; i<nut->avf->nb_streams; i++) { | |
593 | StreamContext *nus= &nut->stream[i]; | |
594 | int64_t last_pts= -1; | |
595 | int j, k; | |
596 | for (j=0; j<nut->sp_count; j++) { | |
597 | int flag; | |
598 | int n = 0; | |
599 | ||
600 | if (j && nus->keyframe_pts[j] == nus->keyframe_pts[j-1]) { | |
601 | av_log(nut->avf, AV_LOG_WARNING, "Multiple keyframes with same PTS\n"); | |
602 | nus->keyframe_pts[j] = AV_NOPTS_VALUE; | |
603 | } | |
604 | ||
605 | flag = (nus->keyframe_pts[j] != AV_NOPTS_VALUE) ^ (j+1 == nut->sp_count); | |
606 | for (; j<nut->sp_count && (nus->keyframe_pts[j] != AV_NOPTS_VALUE) == flag; j++) | |
607 | n++; | |
608 | ||
609 | ff_put_v(bc, 1 + 2*flag + 4*n); | |
610 | for (k= j - n; k<=j && k<nut->sp_count; k++) { | |
611 | if (nus->keyframe_pts[k] == AV_NOPTS_VALUE) | |
612 | continue; | |
613 | av_assert0(nus->keyframe_pts[k] > last_pts); | |
614 | ff_put_v(bc, nus->keyframe_pts[k] - last_pts); | |
615 | last_pts = nus->keyframe_pts[k]; | |
616 | } | |
617 | } | |
618 | } | |
619 | ||
620 | payload_size = avio_tell(bc) - startpos + 8 + 4; | |
621 | ||
622 | avio_wb64(bc, 8 + payload_size + av_log2(payload_size) / 7 + 1 + 4*(payload_size > 4096)); | |
623 | ||
624 | return 0; | |
625 | } | |
626 | ||
627 | static int write_headers(AVFormatContext *avctx, AVIOContext *bc) | |
628 | { | |
629 | NUTContext *nut = avctx->priv_data; | |
630 | AVIOContext *dyn_bc; | |
631 | int i, ret; | |
632 | ||
633 | ff_metadata_conv_ctx(avctx, ff_nut_metadata_conv, NULL); | |
634 | ||
635 | ret = avio_open_dyn_buf(&dyn_bc); | |
636 | if (ret < 0) | |
637 | return ret; | |
638 | write_mainheader(nut, dyn_bc); | |
639 | put_packet(nut, bc, dyn_bc, 1, MAIN_STARTCODE); | |
640 | ||
641 | for (i = 0; i < nut->avf->nb_streams; i++) { | |
642 | ret = avio_open_dyn_buf(&dyn_bc); | |
643 | if (ret < 0) | |
644 | return ret; | |
645 | ret = write_streamheader(avctx, dyn_bc, nut->avf->streams[i], i); | |
646 | if (ret < 0) | |
647 | return ret; | |
648 | put_packet(nut, bc, dyn_bc, 1, STREAM_STARTCODE); | |
649 | } | |
650 | ||
651 | ret = avio_open_dyn_buf(&dyn_bc); | |
652 | if (ret < 0) | |
653 | return ret; | |
654 | write_globalinfo(nut, dyn_bc); | |
655 | put_packet(nut, bc, dyn_bc, 1, INFO_STARTCODE); | |
656 | ||
657 | for (i = 0; i < nut->avf->nb_streams; i++) { | |
658 | ret = avio_open_dyn_buf(&dyn_bc); | |
659 | if (ret < 0) | |
660 | return ret; | |
661 | ret = write_streaminfo(nut, dyn_bc, i); | |
662 | if (ret < 0) | |
663 | return ret; | |
664 | if (ret > 0) | |
665 | put_packet(nut, bc, dyn_bc, 1, INFO_STARTCODE); | |
666 | else { | |
667 | uint8_t *buf; | |
668 | avio_close_dyn_buf(dyn_bc, &buf); | |
669 | av_free(buf); | |
670 | } | |
671 | } | |
672 | ||
673 | for (i = 0; i < nut->avf->nb_chapters; i++) { | |
674 | ret = avio_open_dyn_buf(&dyn_bc); | |
675 | if (ret < 0) | |
676 | return ret; | |
677 | ret = write_chapter(nut, dyn_bc, i); | |
678 | if (ret < 0) { | |
679 | uint8_t *buf; | |
680 | avio_close_dyn_buf(dyn_bc, &buf); | |
681 | av_freep(&buf); | |
682 | return ret; | |
683 | } | |
684 | put_packet(nut, bc, dyn_bc, 1, INFO_STARTCODE); | |
685 | } | |
686 | ||
687 | nut->last_syncpoint_pos = INT_MIN; | |
688 | nut->header_count++; | |
689 | return 0; | |
690 | } | |
691 | ||
692 | static int nut_write_header(AVFormatContext *s) | |
693 | { | |
694 | NUTContext *nut = s->priv_data; | |
695 | AVIOContext *bc = s->pb; | |
696 | int i, j, ret; | |
697 | ||
698 | nut->avf = s; | |
699 | ||
700 | nut->version = FFMAX(NUT_STABLE_VERSION, 3 + !!nut->flags); | |
701 | if (nut->version > 3 && s->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL) { | |
702 | av_log(s, AV_LOG_ERROR, | |
703 | "The additional syncpoint modes require version %d, " | |
704 | "that is currently not finalized, " | |
705 | "please set -f_strict experimental in order to enable it.\n", | |
706 | nut->version); | |
707 | return AVERROR_EXPERIMENTAL; | |
708 | } | |
709 | ||
710 | nut->stream = av_calloc(s->nb_streams, sizeof(*nut->stream )); | |
711 | nut->chapter = av_calloc(s->nb_chapters, sizeof(*nut->chapter)); | |
712 | nut->time_base= av_calloc(s->nb_streams + | |
713 | s->nb_chapters, sizeof(*nut->time_base)); | |
714 | if (!nut->stream || !nut->chapter || !nut->time_base) { | |
715 | av_freep(&nut->stream); | |
716 | av_freep(&nut->chapter); | |
717 | av_freep(&nut->time_base); | |
718 | return AVERROR(ENOMEM); | |
719 | } | |
720 | ||
721 | for (i = 0; i < s->nb_streams; i++) { | |
722 | AVStream *st = s->streams[i]; | |
723 | int ssize; | |
724 | AVRational time_base; | |
725 | ff_parse_specific_params(st, &time_base.den, &ssize, &time_base.num); | |
726 | ||
727 | if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO && st->codec->sample_rate) { | |
728 | time_base = (AVRational) {1, st->codec->sample_rate}; | |
729 | } else { | |
730 | time_base = ff_choose_timebase(s, st, 48000); | |
731 | } | |
732 | ||
733 | avpriv_set_pts_info(st, 64, time_base.num, time_base.den); | |
734 | ||
735 | for (j = 0; j < nut->time_base_count; j++) | |
736 | if (!memcmp(&time_base, &nut->time_base[j], sizeof(AVRational))) { | |
737 | break; | |
738 | } | |
739 | nut->time_base[j] = time_base; | |
740 | nut->stream[i].time_base = &nut->time_base[j]; | |
741 | if (j == nut->time_base_count) | |
742 | nut->time_base_count++; | |
743 | ||
744 | if (INT64_C(1000) * time_base.num >= time_base.den) | |
745 | nut->stream[i].msb_pts_shift = 7; | |
746 | else | |
747 | nut->stream[i].msb_pts_shift = 14; | |
748 | nut->stream[i].max_pts_distance = | |
749 | FFMAX(time_base.den, time_base.num) / time_base.num; | |
750 | } | |
751 | ||
752 | for (i = 0; i < s->nb_chapters; i++) { | |
753 | AVChapter *ch = s->chapters[i]; | |
754 | ||
755 | for (j = 0; j < nut->time_base_count; j++) | |
756 | if (!memcmp(&ch->time_base, &nut->time_base[j], sizeof(AVRational))) | |
757 | break; | |
758 | ||
759 | nut->time_base[j] = ch->time_base; | |
760 | nut->chapter[i].time_base = &nut->time_base[j]; | |
761 | if (j == nut->time_base_count) | |
762 | nut->time_base_count++; | |
763 | } | |
764 | ||
765 | nut->max_distance = MAX_DISTANCE; | |
766 | build_elision_headers(s); | |
767 | build_frame_code(s); | |
768 | av_assert0(nut->frame_code['N'].flags == FLAG_INVALID); | |
769 | ||
770 | avio_write(bc, ID_STRING, strlen(ID_STRING)); | |
771 | avio_w8(bc, 0); | |
772 | ||
773 | if ((ret = write_headers(s, bc)) < 0) | |
774 | return ret; | |
775 | ||
776 | if (s->avoid_negative_ts < 0) | |
777 | s->avoid_negative_ts = 1; | |
778 | ||
779 | avio_flush(bc); | |
780 | ||
781 | return 0; | |
782 | } | |
783 | ||
784 | static int get_needed_flags(NUTContext *nut, StreamContext *nus, FrameCode *fc, | |
785 | AVPacket *pkt) | |
786 | { | |
787 | int flags = 0; | |
788 | ||
789 | if (pkt->flags & AV_PKT_FLAG_KEY) | |
790 | flags |= FLAG_KEY; | |
791 | if (pkt->stream_index != fc->stream_id) | |
792 | flags |= FLAG_STREAM_ID; | |
793 | if (pkt->size / fc->size_mul) | |
794 | flags |= FLAG_SIZE_MSB; | |
795 | if (pkt->pts - nus->last_pts != fc->pts_delta) | |
796 | flags |= FLAG_CODED_PTS; | |
797 | if (pkt->side_data_elems && nut->version > 3) | |
798 | flags |= FLAG_SM_DATA; | |
799 | if (pkt->size > 2 * nut->max_distance) | |
800 | flags |= FLAG_CHECKSUM; | |
801 | if (FFABS(pkt->pts - nus->last_pts) > nus->max_pts_distance) | |
802 | flags |= FLAG_CHECKSUM; | |
803 | if (pkt->size < nut->header_len[fc->header_idx] || | |
804 | (pkt->size > 4096 && fc->header_idx) || | |
805 | memcmp(pkt->data, nut->header[fc->header_idx], | |
806 | nut->header_len[fc->header_idx])) | |
807 | flags |= FLAG_HEADER_IDX; | |
808 | ||
809 | return flags | (fc->flags & FLAG_CODED); | |
810 | } | |
811 | ||
812 | static int find_best_header_idx(NUTContext *nut, AVPacket *pkt) | |
813 | { | |
814 | int i; | |
815 | int best_i = 0; | |
816 | int best_len = 0; | |
817 | ||
818 | if (pkt->size > 4096) | |
819 | return 0; | |
820 | ||
821 | for (i = 1; i < nut->header_count; i++) | |
822 | if (pkt->size >= nut->header_len[i] | |
823 | && nut->header_len[i] > best_len | |
824 | && !memcmp(pkt->data, nut->header[i], nut->header_len[i])) { | |
825 | best_i = i; | |
826 | best_len = nut->header_len[i]; | |
827 | } | |
828 | return best_i; | |
829 | } | |
830 | ||
831 | static int write_sm_data(AVFormatContext *s, AVIOContext *bc, AVPacket *pkt, int is_meta) | |
832 | { | |
833 | int ret, i, dyn_size; | |
834 | unsigned flags; | |
835 | AVIOContext *dyn_bc; | |
836 | int sm_data_count = 0; | |
837 | uint8_t tmp[256]; | |
838 | uint8_t *dyn_buf; | |
839 | ||
840 | ret = avio_open_dyn_buf(&dyn_bc); | |
841 | if (ret < 0) | |
842 | return ret; | |
843 | ||
844 | for (i = 0; i<pkt->side_data_elems; i++) { | |
845 | const uint8_t *data = pkt->side_data[i].data; | |
846 | int size = pkt->side_data[i].size; | |
847 | const uint8_t *data_end = data + size; | |
848 | ||
849 | if (is_meta) { | |
850 | if ( pkt->side_data[i].type == AV_PKT_DATA_METADATA_UPDATE | |
851 | || pkt->side_data[i].type == AV_PKT_DATA_STRINGS_METADATA) { | |
852 | if (!size || data[size-1]) { | |
853 | ret = AVERROR(EINVAL); | |
854 | goto fail; | |
855 | } | |
856 | while (data < data_end) { | |
857 | const uint8_t *key = data; | |
858 | const uint8_t *val = data + strlen(key) + 1; | |
859 | ||
860 | if(val >= data_end) { | |
861 | ret = AVERROR(EINVAL); | |
862 | goto fail; | |
863 | } | |
864 | put_str(dyn_bc, key); | |
865 | put_s(dyn_bc, -1); | |
866 | put_str(dyn_bc, val); | |
867 | data = val + strlen(val) + 1; | |
868 | sm_data_count++; | |
869 | } | |
870 | } | |
871 | } else { | |
872 | switch (pkt->side_data[i].type) { | |
873 | case AV_PKT_DATA_PALETTE: | |
874 | case AV_PKT_DATA_NEW_EXTRADATA: | |
875 | case AV_PKT_DATA_MATROSKA_BLOCKADDITIONAL: | |
876 | default: | |
877 | if (pkt->side_data[i].type == AV_PKT_DATA_PALETTE) { | |
878 | put_str(dyn_bc, "Palette"); | |
879 | } else if(pkt->side_data[i].type == AV_PKT_DATA_NEW_EXTRADATA) { | |
880 | put_str(dyn_bc, "Extradata"); | |
881 | } else if(pkt->side_data[i].type == AV_PKT_DATA_MATROSKA_BLOCKADDITIONAL) { | |
882 | snprintf(tmp, sizeof(tmp), "CodecSpecificSide%"PRId64"", AV_RB64(data)); | |
883 | put_str(dyn_bc, tmp); | |
884 | } else { | |
885 | snprintf(tmp, sizeof(tmp), "UserData%s-SD-%d", | |
886 | (s->flags & AVFMT_FLAG_BITEXACT) ? "Lavf" : LIBAVFORMAT_IDENT, | |
887 | pkt->side_data[i].type); | |
888 | put_str(dyn_bc, tmp); | |
889 | } | |
890 | put_s(dyn_bc, -2); | |
891 | put_str(dyn_bc, "bin"); | |
892 | ff_put_v(dyn_bc, pkt->side_data[i].size); | |
893 | avio_write(dyn_bc, data, pkt->side_data[i].size); | |
894 | sm_data_count++; | |
895 | break; | |
896 | case AV_PKT_DATA_PARAM_CHANGE: | |
897 | flags = bytestream_get_le32(&data); | |
898 | if (flags & AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_COUNT) { | |
899 | put_str(dyn_bc, "Channels"); | |
900 | put_s(dyn_bc, bytestream_get_le32(&data)); | |
901 | sm_data_count++; | |
902 | } | |
903 | if (flags & AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_LAYOUT) { | |
904 | put_str(dyn_bc, "ChannelLayout"); | |
905 | put_s(dyn_bc, -2); | |
906 | put_str(dyn_bc, "u64"); | |
907 | ff_put_v(bc, 8); | |
908 | avio_write(dyn_bc, data, 8); data+=8; | |
909 | sm_data_count++; | |
910 | } | |
911 | if (flags & AV_SIDE_DATA_PARAM_CHANGE_SAMPLE_RATE) { | |
912 | put_str(dyn_bc, "SampleRate"); | |
913 | put_s(dyn_bc, bytestream_get_le32(&data)); | |
914 | sm_data_count++; | |
915 | } | |
916 | if (flags & AV_SIDE_DATA_PARAM_CHANGE_DIMENSIONS) { | |
917 | put_str(dyn_bc, "Width"); | |
918 | put_s(dyn_bc, bytestream_get_le32(&data)); | |
919 | put_str(dyn_bc, "Height"); | |
920 | put_s(dyn_bc, bytestream_get_le32(&data)); | |
921 | sm_data_count+=2; | |
922 | } | |
923 | break; | |
924 | case AV_PKT_DATA_SKIP_SAMPLES: | |
925 | if (AV_RL32(data)) { | |
926 | put_str(dyn_bc, "SkipStart"); | |
927 | put_s(dyn_bc, (unsigned)AV_RL32(data)); | |
928 | sm_data_count++; | |
929 | } | |
930 | if (AV_RL32(data+4)) { | |
931 | put_str(dyn_bc, "SkipEnd"); | |
932 | put_s(dyn_bc, (unsigned)AV_RL32(data+4)); | |
933 | sm_data_count++; | |
934 | } | |
935 | break; | |
936 | case AV_PKT_DATA_METADATA_UPDATE: | |
937 | case AV_PKT_DATA_STRINGS_METADATA: | |
938 | // belongs into meta, not side data | |
939 | break; | |
940 | } | |
941 | } | |
942 | } | |
943 | ||
944 | fail: | |
945 | ff_put_v(bc, sm_data_count); | |
946 | dyn_size = avio_close_dyn_buf(dyn_bc, &dyn_buf); | |
947 | avio_write(bc, dyn_buf, dyn_size); | |
948 | av_freep(&dyn_buf); | |
949 | ||
950 | return ret; | |
951 | } | |
952 | ||
953 | static int nut_write_packet(AVFormatContext *s, AVPacket *pkt) | |
954 | { | |
955 | NUTContext *nut = s->priv_data; | |
956 | StreamContext *nus = &nut->stream[pkt->stream_index]; | |
957 | AVIOContext *bc = s->pb, *dyn_bc, *sm_bc = NULL; | |
958 | FrameCode *fc; | |
959 | int64_t coded_pts; | |
960 | int best_length, frame_code, flags, needed_flags, i, header_idx; | |
961 | int best_header_idx; | |
962 | int key_frame = !!(pkt->flags & AV_PKT_FLAG_KEY); | |
963 | int store_sp = 0; | |
964 | int ret = 0; | |
965 | int sm_size = 0; | |
966 | int data_size = pkt->size; | |
967 | uint8_t *sm_buf = NULL; | |
968 | ||
969 | if (pkt->pts < 0) { | |
970 | av_log(s, AV_LOG_ERROR, | |
971 | "Negative pts not supported stream %d, pts %"PRId64"\n", | |
972 | pkt->stream_index, pkt->pts); | |
973 | if (pkt->pts == AV_NOPTS_VALUE) | |
974 | av_log(s, AV_LOG_ERROR, "Try to enable the genpts flag\n"); | |
975 | return AVERROR(EINVAL); | |
976 | } | |
977 | ||
978 | if (pkt->side_data_elems && nut->version > 3) { | |
979 | ret = avio_open_dyn_buf(&sm_bc); | |
980 | if (ret < 0) | |
981 | return ret; | |
982 | ret = write_sm_data(s, sm_bc, pkt, 0); | |
983 | if (ret >= 0) | |
984 | ret = write_sm_data(s, sm_bc, pkt, 1); | |
985 | sm_size = avio_close_dyn_buf(sm_bc, &sm_buf); | |
986 | if (ret < 0) | |
987 | goto fail; | |
988 | data_size += sm_size; | |
989 | } | |
990 | ||
991 | if (1LL << (20 + 3 * nut->header_count) <= avio_tell(bc)) | |
992 | write_headers(s, bc); | |
993 | ||
994 | if (key_frame && !(nus->last_flags & FLAG_KEY)) | |
995 | store_sp = 1; | |
996 | ||
997 | if (data_size + 30 /*FIXME check*/ + avio_tell(bc) >= nut->last_syncpoint_pos + nut->max_distance) | |
998 | store_sp = 1; | |
999 | ||
1000 | //FIXME: Ensure store_sp is 1 in the first place. | |
1001 | ||
1002 | if (store_sp && | |
1003 | (!(nut->flags & NUT_PIPE) || nut->last_syncpoint_pos == INT_MIN)) { | |
1004 | int64_t sp_pos = INT64_MAX; | |
1005 | ||
1006 | ff_nut_reset_ts(nut, *nus->time_base, pkt->dts); | |
1007 | for (i = 0; i < s->nb_streams; i++) { | |
1008 | AVStream *st = s->streams[i]; | |
1009 | int64_t dts_tb = av_rescale_rnd(pkt->dts, | |
1010 | nus->time_base->num * (int64_t)nut->stream[i].time_base->den, | |
1011 | nus->time_base->den * (int64_t)nut->stream[i].time_base->num, | |
1012 | AV_ROUND_DOWN); | |
1013 | int index = av_index_search_timestamp(st, dts_tb, | |
1014 | AVSEEK_FLAG_BACKWARD); | |
1015 | if (index >= 0) { | |
1016 | sp_pos = FFMIN(sp_pos, st->index_entries[index].pos); | |
1017 | if (!nut->write_index && 2*index > st->nb_index_entries) { | |
1018 | memmove(st->index_entries, | |
1019 | st->index_entries + index, | |
1020 | sizeof(*st->index_entries) * (st->nb_index_entries - index)); | |
1021 | st->nb_index_entries -= index; | |
1022 | } | |
1023 | } | |
1024 | } | |
1025 | ||
1026 | nut->last_syncpoint_pos = avio_tell(bc); | |
1027 | ret = avio_open_dyn_buf(&dyn_bc); | |
1028 | if (ret < 0) | |
1029 | goto fail; | |
1030 | put_tt(nut, nus->time_base, dyn_bc, pkt->dts); | |
1031 | ff_put_v(dyn_bc, sp_pos != INT64_MAX ? (nut->last_syncpoint_pos - sp_pos) >> 4 : 0); | |
1032 | ||
1033 | if (nut->flags & NUT_BROADCAST) { | |
1034 | put_tt(nut, nus->time_base, dyn_bc, | |
1035 | av_rescale_q(av_gettime(), AV_TIME_BASE_Q, *nus->time_base)); | |
1036 | } | |
1037 | put_packet(nut, bc, dyn_bc, 1, SYNCPOINT_STARTCODE); | |
1038 | ||
1039 | if (nut->write_index) { | |
1040 | if ((ret = ff_nut_add_sp(nut, nut->last_syncpoint_pos, 0 /*unused*/, pkt->dts)) < 0) | |
1041 | goto fail; | |
1042 | ||
1043 | if ((1ll<<60) % nut->sp_count == 0) | |
1044 | for (i=0; i<s->nb_streams; i++) { | |
1045 | int j; | |
1046 | StreamContext *nus = &nut->stream[i]; | |
1047 | av_reallocp_array(&nus->keyframe_pts, 2*nut->sp_count, sizeof(*nus->keyframe_pts)); | |
1048 | if (!nus->keyframe_pts) { | |
1049 | ret = AVERROR(ENOMEM); | |
1050 | goto fail; | |
1051 | } | |
1052 | for (j=nut->sp_count == 1 ? 0 : nut->sp_count; j<2*nut->sp_count; j++) | |
1053 | nus->keyframe_pts[j] = AV_NOPTS_VALUE; | |
1054 | } | |
1055 | } | |
1056 | } | |
1057 | av_assert0(nus->last_pts != AV_NOPTS_VALUE); | |
1058 | ||
1059 | coded_pts = pkt->pts & ((1 << nus->msb_pts_shift) - 1); | |
1060 | if (ff_lsb2full(nus, coded_pts) != pkt->pts) | |
1061 | coded_pts = pkt->pts + (1 << nus->msb_pts_shift); | |
1062 | ||
1063 | best_header_idx = find_best_header_idx(nut, pkt); | |
1064 | ||
1065 | best_length = INT_MAX; | |
1066 | frame_code = -1; | |
1067 | for (i = 0; i < 256; i++) { | |
1068 | int length = 0; | |
1069 | FrameCode *fc = &nut->frame_code[i]; | |
1070 | int flags = fc->flags; | |
1071 | ||
1072 | if (flags & FLAG_INVALID) | |
1073 | continue; | |
1074 | needed_flags = get_needed_flags(nut, nus, fc, pkt); | |
1075 | ||
1076 | if (flags & FLAG_CODED) { | |
1077 | length++; | |
1078 | flags = needed_flags; | |
1079 | } | |
1080 | ||
1081 | if ((flags & needed_flags) != needed_flags) | |
1082 | continue; | |
1083 | ||
1084 | if ((flags ^ needed_flags) & FLAG_KEY) | |
1085 | continue; | |
1086 | ||
1087 | if (flags & FLAG_STREAM_ID) | |
1088 | length += ff_get_v_length(pkt->stream_index); | |
1089 | ||
1090 | if (data_size % fc->size_mul != fc->size_lsb) | |
1091 | continue; | |
1092 | if (flags & FLAG_SIZE_MSB) | |
1093 | length += ff_get_v_length(data_size / fc->size_mul); | |
1094 | ||
1095 | if (flags & FLAG_CHECKSUM) | |
1096 | length += 4; | |
1097 | ||
1098 | if (flags & FLAG_CODED_PTS) | |
1099 | length += ff_get_v_length(coded_pts); | |
1100 | ||
1101 | if ( (flags & FLAG_CODED) | |
1102 | && nut->header_len[best_header_idx] > nut->header_len[fc->header_idx] + 1) { | |
1103 | flags |= FLAG_HEADER_IDX; | |
1104 | } | |
1105 | ||
1106 | if (flags & FLAG_HEADER_IDX) { | |
1107 | length += 1 - nut->header_len[best_header_idx]; | |
1108 | } else { | |
1109 | length -= nut->header_len[fc->header_idx]; | |
1110 | } | |
1111 | ||
1112 | length *= 4; | |
1113 | length += !(flags & FLAG_CODED_PTS); | |
1114 | length += !(flags & FLAG_CHECKSUM); | |
1115 | ||
1116 | if (length < best_length) { | |
1117 | best_length = length; | |
1118 | frame_code = i; | |
1119 | } | |
1120 | } | |
1121 | av_assert0(frame_code != -1); | |
f6fa7814 | 1122 | |
2ba45a60 DM |
1123 | fc = &nut->frame_code[frame_code]; |
1124 | flags = fc->flags; | |
1125 | needed_flags = get_needed_flags(nut, nus, fc, pkt); | |
1126 | header_idx = fc->header_idx; | |
1127 | ||
1128 | ffio_init_checksum(bc, ff_crc04C11DB7_update, 0); | |
1129 | avio_w8(bc, frame_code); | |
1130 | if (flags & FLAG_CODED) { | |
1131 | ff_put_v(bc, (flags ^ needed_flags) & ~(FLAG_CODED)); | |
1132 | flags = needed_flags; | |
1133 | } | |
1134 | if (flags & FLAG_STREAM_ID) ff_put_v(bc, pkt->stream_index); | |
1135 | if (flags & FLAG_CODED_PTS) ff_put_v(bc, coded_pts); | |
1136 | if (flags & FLAG_SIZE_MSB ) ff_put_v(bc, data_size / fc->size_mul); | |
1137 | if (flags & FLAG_HEADER_IDX) ff_put_v(bc, header_idx = best_header_idx); | |
1138 | ||
1139 | if (flags & FLAG_CHECKSUM) avio_wl32(bc, ffio_get_checksum(bc)); | |
1140 | else ffio_get_checksum(bc); | |
1141 | ||
1142 | if (flags & FLAG_SM_DATA) { | |
1143 | avio_write(bc, sm_buf, sm_size); | |
1144 | } | |
1145 | avio_write(bc, pkt->data + nut->header_len[header_idx], pkt->size - nut->header_len[header_idx]); | |
1146 | ||
1147 | nus->last_flags = flags; | |
1148 | nus->last_pts = pkt->pts; | |
1149 | ||
1150 | //FIXME just store one per syncpoint | |
1151 | if (flags & FLAG_KEY && !(nut->flags & NUT_PIPE)) { | |
1152 | av_add_index_entry( | |
1153 | s->streams[pkt->stream_index], | |
1154 | nut->last_syncpoint_pos, | |
1155 | pkt->pts, | |
1156 | 0, | |
1157 | 0, | |
1158 | AVINDEX_KEYFRAME); | |
1159 | if (nus->keyframe_pts && nus->keyframe_pts[nut->sp_count] == AV_NOPTS_VALUE) | |
1160 | nus->keyframe_pts[nut->sp_count] = pkt->pts; | |
1161 | } | |
1162 | ||
1163 | if (!nut->max_pts_tb || av_compare_ts(nut->max_pts, *nut->max_pts_tb, pkt->pts, *nus->time_base) < 0) { | |
1164 | nut->max_pts = pkt->pts; | |
1165 | nut->max_pts_tb = nus->time_base; | |
1166 | } | |
1167 | ||
1168 | fail: | |
1169 | av_freep(&sm_buf); | |
1170 | ||
1171 | return ret; | |
1172 | } | |
1173 | ||
1174 | static int nut_write_trailer(AVFormatContext *s) | |
1175 | { | |
1176 | NUTContext *nut = s->priv_data; | |
1177 | AVIOContext *bc = s->pb, *dyn_bc; | |
1178 | int i, ret; | |
1179 | ||
1180 | while (nut->header_count < 3) | |
1181 | write_headers(s, bc); | |
1182 | ||
1183 | ret = avio_open_dyn_buf(&dyn_bc); | |
1184 | if (ret >= 0 && nut->sp_count) { | |
1185 | av_assert1(nut->write_index); | |
1186 | write_index(nut, dyn_bc); | |
1187 | put_packet(nut, bc, dyn_bc, 1, INDEX_STARTCODE); | |
1188 | } | |
1189 | ||
1190 | ff_nut_free_sp(nut); | |
1191 | for (i=0; i<s->nb_streams; i++) | |
1192 | av_freep(&nut->stream[i].keyframe_pts); | |
1193 | ||
1194 | av_freep(&nut->stream); | |
1195 | av_freep(&nut->chapter); | |
1196 | av_freep(&nut->time_base); | |
1197 | ||
1198 | return 0; | |
1199 | } | |
1200 | ||
1201 | #define OFFSET(x) offsetof(NUTContext, x) | |
1202 | #define E AV_OPT_FLAG_ENCODING_PARAM | |
1203 | static const AVOption options[] = { | |
1204 | { "syncpoints", "NUT syncpoint behaviour", OFFSET(flags), AV_OPT_TYPE_FLAGS, {.i64 = 0}, INT_MIN, INT_MAX, E, "syncpoints" }, | |
1205 | { "default", "", 0, AV_OPT_TYPE_CONST, {.i64 = 0}, INT_MIN, INT_MAX, E, "syncpoints" }, | |
1206 | { "none", "Disable syncpoints, low overhead and unseekable", 0, AV_OPT_TYPE_CONST, {.i64 = NUT_PIPE}, INT_MIN, INT_MAX, E, "syncpoints" }, | |
1207 | { "timestamped", "Extend syncpoints with a wallclock timestamp", 0, AV_OPT_TYPE_CONST, {.i64 = NUT_BROADCAST}, INT_MIN, INT_MAX, E, "syncpoints" }, | |
1208 | { "write_index", "Write index", OFFSET(write_index), AV_OPT_TYPE_INT, {.i64 = 1}, 0, 1, E, }, | |
1209 | { NULL }, | |
1210 | }; | |
1211 | ||
1212 | static const AVClass class = { | |
1213 | .class_name = "nutenc", | |
1214 | .item_name = av_default_item_name, | |
1215 | .option = options, | |
1216 | .version = LIBAVUTIL_VERSION_INT, | |
1217 | }; | |
1218 | ||
1219 | AVOutputFormat ff_nut_muxer = { | |
1220 | .name = "nut", | |
1221 | .long_name = NULL_IF_CONFIG_SMALL("NUT"), | |
1222 | .mime_type = "video/x-nut", | |
1223 | .extensions = "nut", | |
1224 | .priv_data_size = sizeof(NUTContext), | |
1225 | .audio_codec = CONFIG_LIBVORBIS ? AV_CODEC_ID_VORBIS : | |
1226 | CONFIG_LIBMP3LAME ? AV_CODEC_ID_MP3 : AV_CODEC_ID_MP2, | |
1227 | .video_codec = AV_CODEC_ID_MPEG4, | |
1228 | .write_header = nut_write_header, | |
1229 | .write_packet = nut_write_packet, | |
1230 | .write_trailer = nut_write_trailer, | |
1231 | .flags = AVFMT_GLOBALHEADER | AVFMT_VARIABLE_FPS, | |
1232 | .codec_tag = ff_nut_codec_tags, | |
1233 | .priv_class = &class, | |
1234 | }; |