Fix wrong error message.
[libav.git] / libavformat / nutenc.c
CommitLineData
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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 "nut.h"
7c04134f 23#include "tree.h"
70ea1e69 24
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25static void build_frame_code(AVFormatContext *s){
26 NUTContext *nut = s->priv_data;
27 int key_frame, index, pred, stream_id;
28 int start=1;
29 int end= 254;
30 int keyframe_0_esc= s->nb_streams > 2;
31 int pred_table[10];
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32 FrameCode *ft;
33
34 ft= &nut->frame_code[start];
35 ft->flags= FLAG_CODED;
36 ft->size_mul=1;
37 ft->pts_delta=1;
38 start++;
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39
40 if(keyframe_0_esc){
41 /* keyframe = 0 escape */
42 FrameCode *ft= &nut->frame_code[start];
43 ft->flags= FLAG_STREAM_ID | FLAG_SIZE_MSB | FLAG_CODED_PTS;
44 ft->size_mul=1;
45 start++;
46 }
47
48 for(stream_id= 0; stream_id<s->nb_streams; stream_id++){
49 int start2= start + (end-start)*stream_id / s->nb_streams;
50 int end2 = start + (end-start)*(stream_id+1) / s->nb_streams;
51 AVCodecContext *codec = s->streams[stream_id]->codec;
52 int is_audio= codec->codec_type == CODEC_TYPE_AUDIO;
53 int intra_only= /*codec->intra_only || */is_audio;
54 int pred_count;
55
56 for(key_frame=0; key_frame<2; key_frame++){
57 if(intra_only && keyframe_0_esc && key_frame==0)
58 continue;
59
60 {
61 FrameCode *ft= &nut->frame_code[start2];
62 ft->flags= FLAG_KEY*key_frame;
63 ft->flags|= FLAG_SIZE_MSB | FLAG_CODED_PTS;
64 ft->stream_id= stream_id;
65 ft->size_mul=1;
66 start2++;
67 }
68 }
69
70 key_frame= intra_only;
71#if 1
72 if(is_audio){
73 int frame_bytes= codec->frame_size*(int64_t)codec->bit_rate / (8*codec->sample_rate);
74 int pts;
75 for(pts=0; pts<2; pts++){
76 for(pred=0; pred<2; pred++){
77 FrameCode *ft= &nut->frame_code[start2];
78 ft->flags= FLAG_KEY*key_frame;
79 ft->stream_id= stream_id;
80 ft->size_mul=frame_bytes + 2;
81 ft->size_lsb=frame_bytes + pred;
82 ft->pts_delta=pts;
83 start2++;
84 }
85 }
86 }else{
87 FrameCode *ft= &nut->frame_code[start2];
88 ft->flags= FLAG_KEY | FLAG_SIZE_MSB;
89 ft->stream_id= stream_id;
90 ft->size_mul=1;
91 ft->pts_delta=1;
92 start2++;
93 }
94#endif
95
96 if(codec->has_b_frames){
97 pred_count=5;
98 pred_table[0]=-2;
99 pred_table[1]=-1;
100 pred_table[2]=1;
101 pred_table[3]=3;
102 pred_table[4]=4;
103 }else if(codec->codec_id == CODEC_ID_VORBIS){
104 pred_count=3;
105 pred_table[0]=2;
106 pred_table[1]=9;
107 pred_table[2]=16;
108 }else{
109 pred_count=1;
110 pred_table[0]=1;
111 }
112
113 for(pred=0; pred<pred_count; pred++){
114 int start3= start2 + (end2-start2)*pred / pred_count;
115 int end3 = start2 + (end2-start2)*(pred+1) / pred_count;
116
117 for(index=start3; index<end3; index++){
118 FrameCode *ft= &nut->frame_code[index];
119 ft->flags= FLAG_KEY*key_frame;
120 ft->flags|= FLAG_SIZE_MSB;
121 ft->stream_id= stream_id;
122//FIXME use single byte size and pred from last
123 ft->size_mul= end3-start3;
124 ft->size_lsb= index - start3;
125 ft->pts_delta= pred_table[pred];
126 }
127 }
128 }
129 memmove(&nut->frame_code['N'+1], &nut->frame_code['N'], sizeof(FrameCode)*(255-'N'));
130 nut->frame_code[ 0].flags=
131 nut->frame_code[255].flags=
132 nut->frame_code['N'].flags= FLAG_INVALID;
133}
134
135/**
136 * Gets the length in bytes which is needed to store val as v.
137 */
138static int get_length(uint64_t val){
139 int i=1;
140
141 while(val>>=7)
142 i++;
143
144 return i;
145}
146
147static void put_v(ByteIOContext *bc, uint64_t val){
148 int i= get_length(val);
149
150 while(--i>0)
151 put_byte(bc, 128 | (val>>(7*i)));
152
153 put_byte(bc, val&127);
154}
155
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156static void put_t(NUTContext *nut, StreamContext *nus, ByteIOContext *bc, uint64_t val){
157 val *= nut->time_base_count;
158 val += nus->time_base - nut->time_base;
159 put_v(bc, val);
160}
161
70ea1e69 162/**
93951943 163 * Stores a string as vb.
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164 */
165static void put_str(ByteIOContext *bc, const char *string){
166 int len= strlen(string);
167
168 put_v(bc, len);
169 put_buffer(bc, string, len);
170}
171
172static void put_s(ByteIOContext *bc, int64_t val){
173 put_v(bc, 2*FFABS(val) - (val>0));
174}
175
176#ifdef TRACE
177static inline void put_v_trace(ByteIOContext *bc, uint64_t v, char *file, char *func, int line){
7a26da44 178 av_log(NULL, AV_LOG_DEBUG, "put_v %5"PRId64" / %"PRIX64" in %s %s:%d\n", v, v, file, func, line);
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179
180 put_v(bc, v);
181}
182
183static inline void put_s_trace(ByteIOContext *bc, int64_t v, char *file, char *func, int line){
7a26da44 184 av_log(NULL, AV_LOG_DEBUG, "put_s %5"PRId64" / %"PRIX64" in %s %s:%d\n", v, v, file, func, line);
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185
186 put_s(bc, v);
187}
188#define put_v(bc, v) put_v_trace(bc, v, __FILE__, __PRETTY_FUNCTION__, __LINE__)
189#define put_s(bc, v) put_s_trace(bc, v, __FILE__, __PRETTY_FUNCTION__, __LINE__)
190#endif
191
34f8cc38 192//FIXME remove calculate_checksum
f0a9978c 193static void put_packet(NUTContext *nut, ByteIOContext *bc, ByteIOContext *dyn_bc, int calculate_checksum, uint64_t startcode){
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194 uint8_t *dyn_buf=NULL;
195 int dyn_size= url_close_dyn_buf(dyn_bc, &dyn_buf);
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196 int forw_ptr= dyn_size + 4*calculate_checksum;
197
198 if(forw_ptr > 4096)
992e78f5 199 init_checksum(bc, ff_crc04C11DB7_update, 0);
f0a9978c 200 put_be64(bc, startcode);
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201 put_v(bc, forw_ptr);
202 if(forw_ptr > 4096)
203 put_le32(bc, get_checksum(bc));
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204
205 if(calculate_checksum)
992e78f5 206 init_checksum(bc, ff_crc04C11DB7_update, 0);
8d9a3f7e 207 put_buffer(bc, dyn_buf, dyn_size);
70ea1e69 208 if(calculate_checksum)
8d9a3f7e 209 put_le32(bc, get_checksum(bc));
70ea1e69 210
8d9a3f7e 211 av_free(dyn_buf);
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212}
213
97d5eb11 214static void write_mainheader(NUTContext *nut, ByteIOContext *bc){
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215 int i, j, tmp_pts, tmp_flags, tmp_stream, tmp_mul, tmp_size, tmp_fields;
216
a17e046a 217 put_v(bc, 3); /* version */
97d5eb11 218 put_v(bc, nut->avf->nb_streams);
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219 put_v(bc, MAX_DISTANCE);
220 put_v(bc, nut->time_base_count);
221
222 for(i=0; i<nut->time_base_count; i++){
223 put_v(bc, nut->time_base[i].num);
224 put_v(bc, nut->time_base[i].den);
225 }
226
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227 tmp_pts=0;
228 tmp_mul=1;
229 tmp_stream=0;
230 for(i=0; i<256;){
231 tmp_fields=0;
232 tmp_size=0;
233// tmp_res=0;
234 if(tmp_pts != nut->frame_code[i].pts_delta) tmp_fields=1;
235 if(tmp_mul != nut->frame_code[i].size_mul ) tmp_fields=2;
236 if(tmp_stream != nut->frame_code[i].stream_id) tmp_fields=3;
237 if(tmp_size != nut->frame_code[i].size_lsb ) tmp_fields=4;
238// if(tmp_res != nut->frame_code[i].res ) tmp_fields=5;
239
240 tmp_pts = nut->frame_code[i].pts_delta;
241 tmp_flags = nut->frame_code[i].flags;
242 tmp_stream= nut->frame_code[i].stream_id;
243 tmp_mul = nut->frame_code[i].size_mul;
244 tmp_size = nut->frame_code[i].size_lsb;
245// tmp_res = nut->frame_code[i].res;
246
247 for(j=0; i<256; j++,i++){
248 if(i == 'N'){
249 j--;
250 continue;
251 }
252 if(nut->frame_code[i].pts_delta != tmp_pts ) break;
253 if(nut->frame_code[i].flags != tmp_flags ) break;
254 if(nut->frame_code[i].stream_id != tmp_stream) break;
255 if(nut->frame_code[i].size_mul != tmp_mul ) break;
256 if(nut->frame_code[i].size_lsb != tmp_size+j) break;
257// if(nut->frame_code[i].res != tmp_res ) break;
258 }
259 if(j != tmp_mul - tmp_size) tmp_fields=6;
260
261 put_v(bc, tmp_flags);
262 put_v(bc, tmp_fields);
263 if(tmp_fields>0) put_s(bc, tmp_pts);
264 if(tmp_fields>1) put_v(bc, tmp_mul);
265 if(tmp_fields>2) put_v(bc, tmp_stream);
266 if(tmp_fields>3) put_v(bc, tmp_size);
267 if(tmp_fields>4) put_v(bc, 0 /*tmp_res*/);
268 if(tmp_fields>5) put_v(bc, j);
269 }
97d5eb11 270}
70ea1e69 271
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272static int write_streamheader(NUTContext *nut, ByteIOContext *bc, AVCodecContext *codec, int i){
273 put_v(bc, i);
274 switch(codec->codec_type){
275 case CODEC_TYPE_VIDEO: put_v(bc, 0); break;
276 case CODEC_TYPE_AUDIO: put_v(bc, 1); break;
277// case CODEC_TYPE_TEXT : put_v(bc, 2); break;
278 default : put_v(bc, 3); break;
279 }
280 put_v(bc, 4);
281 if (codec->codec_tag){
282 put_le32(bc, codec->codec_tag);
283 }else
284 return -1;
285
6e6cf116 286 put_v(bc, nut->stream[i].time_base - nut->time_base);
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287 put_v(bc, nut->stream[i].msb_pts_shift);
288 put_v(bc, nut->stream[i].max_pts_distance);
289 put_v(bc, codec->has_b_frames);
290 put_byte(bc, 0); /* flags: 0x1 - fixed_fps, 0x2 - index_present */
291
292 put_v(bc, codec->extradata_size);
293 put_buffer(bc, codec->extradata, codec->extradata_size);
294
295 switch(codec->codec_type){
296 case CODEC_TYPE_AUDIO:
297 put_v(bc, codec->sample_rate);
298 put_v(bc, 1);
299 put_v(bc, codec->channels);
300 break;
301 case CODEC_TYPE_VIDEO:
302 put_v(bc, codec->width);
303 put_v(bc, codec->height);
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304
305 if(codec->sample_aspect_ratio.num<=0 || codec->sample_aspect_ratio.den<=0){
306 put_v(bc, 0);
307 put_v(bc, 0);
308 }else{
309 put_v(bc, codec->sample_aspect_ratio.num);
310 put_v(bc, codec->sample_aspect_ratio.den);
311 }
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312 put_v(bc, 0); /* csp type -- unknown */
313 break;
314 default:
315 break;
316 }
317 return 0;
318}
319
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320static int add_info(ByteIOContext *bc, char *type, char *value){
321 put_str(bc, type);
322 put_s(bc, -1);
323 put_str(bc, value);
324 return 1;
325}
326
327static void write_globalinfo(NUTContext *nut, ByteIOContext *bc){
328 AVFormatContext *s= nut->avf;
329 ByteIOContext dyn_bc;
330 uint8_t *dyn_buf=NULL;
331 int count=0, dyn_size;
332
333 url_open_dyn_buf(&dyn_bc);
334
335 if(s->title [0]) count+= add_info(&dyn_bc, "Title" , s->title);
336 if(s->author [0]) count+= add_info(&dyn_bc, "Author" , s->author);
337 if(s->copyright[0]) count+= add_info(&dyn_bc, "Copyright", s->copyright);
338 if(!(s->streams[0]->codec->flags & CODEC_FLAG_BITEXACT))
339 count+= add_info(&dyn_bc, "Encoder" , LIBAVFORMAT_IDENT);
340
341 put_v(bc, 0); //stream_if_plus1
342 put_v(bc, 0); //chapter_id
343 put_v(bc, 0); //timestamp_start
344 put_v(bc, 0); //length
345
346 put_v(bc, count);
347
348 dyn_size= url_close_dyn_buf(&dyn_bc, &dyn_buf);
349 put_buffer(bc, dyn_buf, dyn_size);
350 av_free(dyn_buf);
351}
352
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353static void write_headers(NUTContext *nut, ByteIOContext *bc){
354 ByteIOContext dyn_bc;
355 int i;
356
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357 url_open_dyn_buf(&dyn_bc);
358 write_mainheader(nut, &dyn_bc);
f0a9978c 359 put_packet(nut, bc, &dyn_bc, 1, MAIN_STARTCODE);
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360
361 for (i=0; i < nut->avf->nb_streams; i++){
362 AVCodecContext *codec = nut->avf->streams[i]->codec;
363
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364 url_open_dyn_buf(&dyn_bc);
365 write_streamheader(nut, &dyn_bc, codec, i);
f0a9978c 366 put_packet(nut, bc, &dyn_bc, 1, STREAM_STARTCODE);
7e506494 367 }
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368
369 url_open_dyn_buf(&dyn_bc);
370 write_globalinfo(nut, &dyn_bc);
371 put_packet(nut, bc, &dyn_bc, 1, INFO_STARTCODE);
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372
373 nut->last_syncpoint_pos= INT_MIN;
374 nut->header_count++;
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375}
376
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377static int write_header(AVFormatContext *s){
378 NUTContext *nut = s->priv_data;
7e506494 379 ByteIOContext *bc = &s->pb;
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380 int i, j;
381
382 nut->avf= s;
383
384 nut->stream = av_mallocz(sizeof(StreamContext)*s->nb_streams);
385 nut->time_base= av_mallocz(sizeof(AVRational )*s->nb_streams);
386
387 for(i=0; i<s->nb_streams; i++){
388 AVStream *st= s->streams[i];
389 int ssize;
390 AVRational time_base;
391 ff_parse_specific_params(st->codec, &time_base.den, &ssize, &time_base.num);
392
393 av_set_pts_info(st, 64, time_base.num, time_base.den);
394
395 for(j=0; j<nut->time_base_count; j++){
396 if(!memcmp(&time_base, &nut->time_base[j], sizeof(AVRational))){
397 break;
398 }
399 }
400 nut->time_base[j]= time_base;
401 nut->stream[i].time_base= &nut->time_base[j];
402 if(j==nut->time_base_count)
403 nut->time_base_count++;
404
405 if(av_q2d(time_base) >= 0.001)
406 nut->stream[i].msb_pts_shift = 7;
407 else
408 nut->stream[i].msb_pts_shift = 14;
409 nut->stream[i].max_pts_distance= FFMAX(1/av_q2d(time_base), 1);
410 }
411
412 build_frame_code(s);
413 assert(nut->frame_code['N'].flags == FLAG_INVALID);
414
415 put_buffer(bc, ID_STRING, strlen(ID_STRING));
416 put_byte(bc, 0);
417
7e506494 418 write_headers(nut, bc);
dcc9bde0 419
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420 put_flush_packet(bc);
421
14b3f996 422 //FIXME index
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423
424 return 0;
425}
426
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427static int get_needed_flags(NUTContext *nut, StreamContext *nus, FrameCode *fc, AVPacket *pkt){
428 int flags= 0;
429
430 if(pkt->flags & PKT_FLAG_KEY ) flags |= FLAG_KEY;
431 if(pkt->stream_index != fc->stream_id ) flags |= FLAG_STREAM_ID;
432 if(pkt->size / fc->size_mul ) flags |= FLAG_SIZE_MSB;
433 if(pkt->pts - nus->last_pts != fc->pts_delta) flags |= FLAG_CODED_PTS;
434 if(pkt->size > 2*nut->max_distance ) flags |= FLAG_CHECKSUM;
435 if(FFABS(pkt->pts - nus->last_pts)
436 > nus->max_pts_distance) flags |= FLAG_CHECKSUM;
437
d2062ff6 438 return flags | (fc->flags & FLAG_CODED);
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439}
440
70ea1e69 441static int write_packet(AVFormatContext *s, AVPacket *pkt){
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442 NUTContext *nut = s->priv_data;
443 StreamContext *nus= &nut->stream[pkt->stream_index];
444 ByteIOContext *bc = &s->pb, dyn_bc;
445 FrameCode *fc;
446 int64_t coded_pts;
447 int best_length, frame_code, flags, needed_flags, i;
448 int key_frame = !!(pkt->flags & PKT_FLAG_KEY);
449 int store_sp=0;
450
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451 if(1LL<<(20+3*nut->header_count) <= url_ftell(bc))
452 write_headers(nut, bc);
453
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454 if(key_frame && !!(nus->last_flags & FLAG_KEY))
455 store_sp= 1;
456
457 if(pkt->size + 30/*FIXME check*/ + url_ftell(bc) >= nut->last_syncpoint_pos + nut->max_distance)
458 store_sp= 1;
459
93951943 460//FIXME: Ensure store_sp is 1 in the first place.
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461
462 if(store_sp){
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463 syncpoint_t *sp, dummy= {.pos= INT64_MAX};
464
e1249ba9 465 ff_nut_reset_ts(nut, *nus->time_base, pkt->dts);
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466 for(i=0; i<s->nb_streams; i++){
467 AVStream *st= s->streams[i];
468 int index= av_index_search_timestamp(st, pkt->dts, AVSEEK_FLAG_BACKWARD);
469 if(index<0) dummy.pos=0;
470 else dummy.pos= FFMIN(dummy.pos, st->index_entries[index].pos);
471 }
472 sp= av_tree_find(nut->syncpoints, &dummy, ff_nut_sp_pos_cmp, NULL);
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473
474 nut->last_syncpoint_pos= url_ftell(bc);
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475 url_open_dyn_buf(&dyn_bc);
476 put_t(nut, nus, &dyn_bc, pkt->dts);
7c04134f 477 put_v(&dyn_bc, sp ? (nut->last_syncpoint_pos - sp->pos)>>4 : 0);
f0a9978c 478 put_packet(nut, bc, &dyn_bc, 1, SYNCPOINT_STARTCODE);
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479
480 ff_nut_add_sp(nut, nut->last_syncpoint_pos, 0/*unused*/, pkt->dts);
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481 }
482 assert(nus->last_pts != AV_NOPTS_VALUE);
483
484 coded_pts = pkt->pts & ((1<<nus->msb_pts_shift)-1);
485 if(ff_lsb2full(nus, coded_pts) != pkt->pts)
486 coded_pts= pkt->pts + (1<<nus->msb_pts_shift);
487
488 best_length=INT_MAX;
489 frame_code= -1;
490 for(i=0; i<256; i++){
491 int length= 0;
492 FrameCode *fc= &nut->frame_code[i];
493 int flags= fc->flags;
494
495 if(flags & FLAG_INVALID)
496 continue;
497 needed_flags= get_needed_flags(nut, nus, fc, pkt);
498
499 if(flags & FLAG_CODED){
500 length++;
63dd9d0e 501 flags = needed_flags;
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502 }
503
504 if((flags & needed_flags) != needed_flags)
505 continue;
506
507 if((flags ^ needed_flags) & FLAG_KEY)
508 continue;
509
510 if(flags & FLAG_STREAM_ID)
511 length+= get_length(pkt->stream_index);
512
513 if(pkt->size % fc->size_mul != fc->size_lsb)
514 continue;
515 if(flags & FLAG_SIZE_MSB)
516 length += get_length(pkt->size / fc->size_mul);
517
518 if(flags & FLAG_CHECKSUM)
519 length+=4;
520
521 if(flags & FLAG_CODED_PTS)
522 length += get_length(coded_pts);
523
524 length*=4;
525 length+= !(flags & FLAG_CODED_PTS);
526 length+= !(flags & FLAG_CHECKSUM);
527
528 if(length < best_length){
529 best_length= length;
530 frame_code=i;
531 }
532 }
533 assert(frame_code != -1);
534 fc= &nut->frame_code[frame_code];
535 flags= fc->flags;
536 needed_flags= get_needed_flags(nut, nus, fc, pkt);
537
992e78f5 538 init_checksum(bc, ff_crc04C11DB7_update, 0);
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539 put_byte(bc, frame_code);
540 if(flags & FLAG_CODED){
541 put_v(bc, (flags^needed_flags) & ~(FLAG_CODED));
542 flags = needed_flags;
543 }
544 if(flags & FLAG_STREAM_ID) put_v(bc, pkt->stream_index);
545 if(flags & FLAG_CODED_PTS) put_v(bc, coded_pts);
546 if(flags & FLAG_SIZE_MSB) put_v(bc, pkt->size / fc->size_mul);
547
548 if(flags & FLAG_CHECKSUM) put_le32(bc, get_checksum(bc));
549 else get_checksum(bc);
550
551 put_buffer(bc, pkt->data, pkt->size);
552 nus->last_flags= flags;
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553
554 //FIXME just store one per syncpoint
555 if(flags & FLAG_KEY)
556 av_add_index_entry(
557 s->streams[pkt->stream_index],
558 nut->last_syncpoint_pos,
559 pkt->pts,
560 0,
561 0,
562 AVINDEX_KEYFRAME);
563
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564 return 0;
565}
566
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567static int write_trailer(AVFormatContext *s){
568 NUTContext *nut= s->priv_data;
569 ByteIOContext *bc= &s->pb;
570
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571 while(nut->header_count<3)
572 write_headers(nut, bc);
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573 put_flush_packet(bc);
574
575 return 0;
576}
577
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578AVOutputFormat nut_muxer = {
579 "nut",
580 "nut format",
581 "video/x-nut",
582 "nut",
583 sizeof(NUTContext),
584#ifdef CONFIG_LIBVORBIS
585 CODEC_ID_VORBIS,
586#elif defined(CONFIG_LIBMP3LAME)
587 CODEC_ID_MP3,
588#else
589 CODEC_ID_MP2, /* AC3 needs liba52 decoder */
590#endif
591 CODEC_ID_MPEG4,
592 write_header,
593 write_packet,
bd533e6c 594 write_trailer,
70ea1e69 595 .flags = AVFMT_GLOBALHEADER,
dcc9bde0 596 .codec_tag= (const AVCodecTag*[]){codec_bmp_tags, codec_wav_tags, 0},
70ea1e69 597};