forked from justinruggles/FFmpeg-alsenc
-
Notifications
You must be signed in to change notification settings - Fork 0
/
ffmpeg.c
4368 lines (3830 loc) · 157 KB
/
ffmpeg.c
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
/*
* FFmpeg main
* Copyright (c) 2000-2003 Fabrice Bellard
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/* needed for usleep() */
#define _XOPEN_SOURCE 600
#include "config.h"
#include <ctype.h>
#include <string.h>
#include <math.h>
#include <stdlib.h>
#include <errno.h>
#include <signal.h>
#include <limits.h>
#include <unistd.h>
#include "libavformat/avformat.h"
#include "libavdevice/avdevice.h"
#include "libswscale/swscale.h"
#include "libavcodec/opt.h"
#include "libavcodec/audioconvert.h"
#include "libavcore/parseutils.h"
#include "libavutil/colorspace.h"
#include "libavutil/fifo.h"
#include "libavutil/pixdesc.h"
#include "libavutil/avstring.h"
#include "libavutil/libm.h"
#include "libavformat/os_support.h"
#if CONFIG_AVFILTER
# include "libavfilter/avfilter.h"
# include "libavfilter/avfiltergraph.h"
# include "libavfilter/graphparser.h"
# include "libavfilter/vsrc_buffer.h"
#endif
#if HAVE_SYS_RESOURCE_H
#include <sys/types.h>
#include <sys/time.h>
#include <sys/resource.h>
#elif HAVE_GETPROCESSTIMES
#include <windows.h>
#endif
#if HAVE_GETPROCESSMEMORYINFO
#include <windows.h>
#include <psapi.h>
#endif
#if HAVE_SYS_SELECT_H
#include <sys/select.h>
#endif
#if HAVE_TERMIOS_H
#include <fcntl.h>
#include <sys/ioctl.h>
#include <sys/time.h>
#include <termios.h>
#elif HAVE_CONIO_H
#include <conio.h>
#endif
#include <time.h>
#include "cmdutils.h"
#undef NDEBUG
#include <assert.h>
const char program_name[] = "FFmpeg";
const int program_birth_year = 2000;
/* select an input stream for an output stream */
typedef struct AVStreamMap {
int file_index;
int stream_index;
int sync_file_index;
int sync_stream_index;
} AVStreamMap;
/** select an input file for an output file */
typedef struct AVMetaDataMap {
int out_file;
int in_file;
} AVMetaDataMap;
static const OptionDef options[];
#define MAX_FILES 100
static const char *last_asked_format = NULL;
static AVFormatContext *input_files[MAX_FILES];
static int64_t input_files_ts_offset[MAX_FILES];
static double input_files_ts_scale[MAX_FILES][MAX_STREAMS];
static AVCodec *input_codecs[MAX_FILES*MAX_STREAMS];
static int nb_input_files = 0;
static int nb_icodecs;
static AVFormatContext *output_files[MAX_FILES];
static AVCodec *output_codecs[MAX_FILES*MAX_STREAMS];
static int nb_output_files = 0;
static int nb_ocodecs;
static AVStreamMap stream_maps[MAX_FILES*MAX_STREAMS];
static int nb_stream_maps;
static AVMetaDataMap meta_data_maps[MAX_FILES];
static int nb_meta_data_maps;
/* indexed by output file stream index */
static int streamid_map[MAX_STREAMS];
static int frame_width = 0;
static int frame_height = 0;
static float frame_aspect_ratio = 0;
static enum PixelFormat frame_pix_fmt = PIX_FMT_NONE;
static enum SampleFormat audio_sample_fmt = SAMPLE_FMT_NONE;
static int frame_topBand = 0;
static int frame_bottomBand = 0;
static int frame_leftBand = 0;
static int frame_rightBand = 0;
static int max_frames[4] = {INT_MAX, INT_MAX, INT_MAX, INT_MAX};
static AVRational frame_rate;
static float video_qscale = 0;
static uint16_t *intra_matrix = NULL;
static uint16_t *inter_matrix = NULL;
static const char *video_rc_override_string=NULL;
static int video_disable = 0;
static int video_discard = 0;
static char *video_codec_name = NULL;
static unsigned int video_codec_tag = 0;
static char *video_language = NULL;
static int same_quality = 0;
static int do_deinterlace = 0;
static int top_field_first = -1;
static int me_threshold = 0;
static int intra_dc_precision = 8;
static int loop_input = 0;
static int loop_output = AVFMT_NOOUTPUTLOOP;
static int qp_hist = 0;
#if CONFIG_AVFILTER
static char *vfilters = NULL;
AVFilterGraph *graph = NULL;
#endif
static int intra_only = 0;
static int audio_sample_rate = 44100;
static int64_t channel_layout = 0;
#define QSCALE_NONE -99999
static float audio_qscale = QSCALE_NONE;
static int audio_disable = 0;
static int audio_channels = 1;
static char *audio_codec_name = NULL;
static unsigned int audio_codec_tag = 0;
static char *audio_language = NULL;
static int subtitle_disable = 0;
static char *subtitle_codec_name = NULL;
static char *subtitle_language = NULL;
static unsigned int subtitle_codec_tag = 0;
static float mux_preload= 0.5;
static float mux_max_delay= 0.7;
static int64_t recording_time = INT64_MAX;
static int64_t start_time = 0;
static int64_t recording_timestamp = 0;
static int64_t input_ts_offset = 0;
static int file_overwrite = 0;
static int metadata_count;
static AVMetadataTag *metadata;
static int do_benchmark = 0;
static int do_hex_dump = 0;
static int do_pkt_dump = 0;
static int do_psnr = 0;
static int do_pass = 0;
static char *pass_logfilename_prefix = NULL;
static int audio_stream_copy = 0;
static int video_stream_copy = 0;
static int subtitle_stream_copy = 0;
static int video_sync_method= -1;
static int audio_sync_method= 0;
static float audio_drift_threshold= 0.1;
static int copy_ts= 0;
static int opt_shortest = 0;
static int video_global_header = 0;
static char *vstats_filename;
static FILE *vstats_file;
static int opt_programid = 0;
static int copy_initial_nonkeyframes = 0;
static int rate_emu = 0;
static int video_channel = 0;
static char *video_standard;
static int audio_volume = 256;
static int exit_on_error = 0;
static int using_stdin = 0;
static int verbose = 1;
static int thread_count= 1;
static int q_pressed = 0;
static int64_t video_size = 0;
static int64_t audio_size = 0;
static int64_t extra_size = 0;
static int nb_frames_dup = 0;
static int nb_frames_drop = 0;
static int input_sync;
static uint64_t limit_filesize = 0;
static int force_fps = 0;
static int pgmyuv_compatibility_hack=0;
static float dts_delta_threshold = 10;
static unsigned int sws_flags = SWS_BICUBIC;
static int64_t timer_start;
static uint8_t *audio_buf;
static uint8_t *audio_out;
unsigned int allocated_audio_out_size, allocated_audio_buf_size;
static short *samples;
static AVBitStreamFilterContext *video_bitstream_filters=NULL;
static AVBitStreamFilterContext *audio_bitstream_filters=NULL;
static AVBitStreamFilterContext *subtitle_bitstream_filters=NULL;
static AVBitStreamFilterContext *bitstream_filters[MAX_FILES][MAX_STREAMS];
#define DEFAULT_PASS_LOGFILENAME_PREFIX "ffmpeg2pass"
struct AVInputStream;
typedef struct AVOutputStream {
int file_index; /* file index */
int index; /* stream index in the output file */
int source_index; /* AVInputStream index */
AVStream *st; /* stream in the output file */
int encoding_needed; /* true if encoding needed for this stream */
int frame_number;
/* input pts and corresponding output pts
for A/V sync */
//double sync_ipts; /* dts from the AVPacket of the demuxer in second units */
struct AVInputStream *sync_ist; /* input stream to sync against */
int64_t sync_opts; /* output frame counter, could be changed to some true timestamp */ //FIXME look at frame_number
/* video only */
int video_resample;
AVFrame pict_tmp; /* temporary image for resampling */
struct SwsContext *img_resample_ctx; /* for image resampling */
int resample_height;
int resample_width;
int resample_pix_fmt;
/* full frame size of first frame */
int original_height;
int original_width;
/* cropping area sizes */
int video_crop;
int topBand;
int bottomBand;
int leftBand;
int rightBand;
/* cropping area of first frame */
int original_topBand;
int original_bottomBand;
int original_leftBand;
int original_rightBand;
/* audio only */
int audio_resample;
ReSampleContext *resample; /* for audio resampling */
int reformat_pair;
AVAudioConvert *reformat_ctx;
AVFifoBuffer *fifo; /* for compression: one audio fifo per codec */
FILE *logfile;
} AVOutputStream;
typedef struct AVInputStream {
int file_index;
int index;
AVStream *st;
int discard; /* true if stream data should be discarded */
int decoding_needed; /* true if the packets must be decoded in 'raw_fifo' */
int64_t sample_index; /* current sample */
int64_t start; /* time when read started */
int64_t next_pts; /* synthetic pts for cases where pkt.pts
is not defined */
int64_t pts; /* current pts */
int is_start; /* is 1 at the start and after a discontinuity */
int showed_multi_packet_warning;
int is_past_recording_time;
#if CONFIG_AVFILTER
AVFilterContext *out_video_filter;
AVFilterContext *input_video_filter;
AVFrame *filter_frame;
int has_filter_frame;
AVFilterBufferRef *picref;
#endif
} AVInputStream;
typedef struct AVInputFile {
int eof_reached; /* true if eof reached */
int ist_index; /* index of first stream in ist_table */
int buffer_size; /* current total buffer size */
int nb_streams; /* nb streams we are aware of */
} AVInputFile;
#if HAVE_TERMIOS_H
/* init terminal so that we can grab keys */
static struct termios oldtty;
#endif
#if CONFIG_AVFILTER
typedef struct {
int pix_fmt;
} FilterOutPriv;
static int output_init(AVFilterContext *ctx, const char *args, void *opaque)
{
FilterOutPriv *priv = ctx->priv;
if(!opaque) return -1;
priv->pix_fmt = *((int *)opaque);
return 0;
}
static void output_end_frame(AVFilterLink *link)
{
}
static int output_query_formats(AVFilterContext *ctx)
{
FilterOutPriv *priv = ctx->priv;
enum PixelFormat pix_fmts[] = { priv->pix_fmt, PIX_FMT_NONE };
avfilter_set_common_formats(ctx, avfilter_make_format_list(pix_fmts));
return 0;
}
static int get_filtered_video_pic(AVFilterContext *ctx,
AVFilterBufferRef **picref, AVFrame *pic2,
uint64_t *pts)
{
AVFilterBufferRef *pic;
if(avfilter_request_frame(ctx->inputs[0]))
return -1;
if(!(pic = ctx->inputs[0]->cur_buf))
return -1;
*picref = pic;
ctx->inputs[0]->cur_buf = NULL;
*pts = pic->pts;
memcpy(pic2->data, pic->data, sizeof(pic->data));
memcpy(pic2->linesize, pic->linesize, sizeof(pic->linesize));
pic2->interlaced_frame = pic->interlaced;
pic2->top_field_first = pic->top_field_first;
return 1;
}
static AVFilter output_filter =
{
.name = "ffmpeg_output",
.priv_size = sizeof(FilterOutPriv),
.init = output_init,
.query_formats = output_query_formats,
.inputs = (AVFilterPad[]) {{ .name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.end_frame = output_end_frame,
.min_perms = AV_PERM_READ, },
{ .name = NULL }},
.outputs = (AVFilterPad[]) {{ .name = NULL }},
};
static int configure_filters(AVInputStream *ist, AVOutputStream *ost)
{
AVFilterContext *last_filter, *filter;
/** filter graph containing all filters including input & output */
AVCodecContext *codec = ost->st->codec;
AVCodecContext *icodec = ist->st->codec;
char args[255];
graph = av_mallocz(sizeof(AVFilterGraph));
if (!(ist->input_video_filter = avfilter_open(avfilter_get_by_name("buffer"), "src")))
return -1;
if (!(ist->out_video_filter = avfilter_open(&output_filter, "out")))
return -1;
snprintf(args, 255, "%d:%d:%d", ist->st->codec->width,
ist->st->codec->height, ist->st->codec->pix_fmt);
if (avfilter_init_filter(ist->input_video_filter, args, NULL))
return -1;
if (avfilter_init_filter(ist->out_video_filter, NULL, &codec->pix_fmt))
return -1;
/* add input and output filters to the overall graph */
avfilter_graph_add_filter(graph, ist->input_video_filter);
avfilter_graph_add_filter(graph, ist->out_video_filter);
last_filter = ist->input_video_filter;
if (ost->video_crop) {
snprintf(args, 255, "%d:%d:%d:%d", ost->leftBand, ost->topBand,
codec->width,
codec->height);
filter = avfilter_open(avfilter_get_by_name("crop"), NULL);
if (!filter)
return -1;
if (avfilter_init_filter(filter, args, NULL))
return -1;
if (avfilter_link(last_filter, 0, filter, 0))
return -1;
last_filter = filter;
avfilter_graph_add_filter(graph, last_filter);
}
if((codec->width !=
icodec->width - (frame_leftBand + frame_rightBand)) ||
(codec->height != icodec->height - (frame_topBand + frame_bottomBand))) {
snprintf(args, 255, "%d:%d:flags=0x%X",
codec->width,
codec->height,
(int)av_get_int(sws_opts, "sws_flags", NULL));
filter = avfilter_open(avfilter_get_by_name("scale"), NULL);
if (!filter)
return -1;
if (avfilter_init_filter(filter, args, NULL))
return -1;
if (avfilter_link(last_filter, 0, filter, 0))
return -1;
last_filter = filter;
avfilter_graph_add_filter(graph, last_filter);
}
snprintf(args, sizeof(args), "flags=0x%X", (int)av_get_int(sws_opts, "sws_flags", NULL));
graph->scale_sws_opts = av_strdup(args);
if (vfilters) {
AVFilterInOut *outputs = av_malloc(sizeof(AVFilterInOut));
AVFilterInOut *inputs = av_malloc(sizeof(AVFilterInOut));
outputs->name = av_strdup("in");
outputs->filter = last_filter;
outputs->pad_idx = 0;
outputs->next = NULL;
inputs->name = av_strdup("out");
inputs->filter = ist->out_video_filter;
inputs->pad_idx = 0;
inputs->next = NULL;
if (avfilter_graph_parse(graph, vfilters, inputs, outputs, NULL) < 0)
return -1;
av_freep(&vfilters);
} else {
if (avfilter_link(last_filter, 0, ist->out_video_filter, 0) < 0)
return -1;
}
/* configure all the filter links */
if (avfilter_graph_check_validity(graph, NULL))
return -1;
if (avfilter_graph_config_formats(graph, NULL))
return -1;
if (avfilter_graph_config_links(graph, NULL))
return -1;
codec->width = ist->out_video_filter->inputs[0]->w;
codec->height = ist->out_video_filter->inputs[0]->h;
return 0;
}
#endif /* CONFIG_AVFILTER */
static void term_exit(void)
{
#if HAVE_TERMIOS_H
tcsetattr (0, TCSANOW, &oldtty);
#endif
}
static volatile int received_sigterm = 0;
static void
sigterm_handler(int sig)
{
received_sigterm = sig;
term_exit();
}
static void term_init(void)
{
#if HAVE_TERMIOS_H
struct termios tty;
tcgetattr (0, &tty);
oldtty = tty;
atexit(term_exit);
tty.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP
|INLCR|IGNCR|ICRNL|IXON);
tty.c_oflag |= OPOST;
tty.c_lflag &= ~(ECHO|ECHONL|ICANON|IEXTEN);
tty.c_cflag &= ~(CSIZE|PARENB);
tty.c_cflag |= CS8;
tty.c_cc[VMIN] = 1;
tty.c_cc[VTIME] = 0;
tcsetattr (0, TCSANOW, &tty);
signal(SIGQUIT, sigterm_handler); /* Quit (POSIX). */
#endif
signal(SIGINT , sigterm_handler); /* Interrupt (ANSI). */
signal(SIGTERM, sigterm_handler); /* Termination (ANSI). */
#ifdef SIGXCPU
signal(SIGXCPU, sigterm_handler);
#endif
}
/* read a key without blocking */
static int read_key(void)
{
#if HAVE_TERMIOS_H
int n = 1;
unsigned char ch;
struct timeval tv;
fd_set rfds;
FD_ZERO(&rfds);
FD_SET(0, &rfds);
tv.tv_sec = 0;
tv.tv_usec = 0;
n = select(1, &rfds, NULL, NULL, &tv);
if (n > 0) {
n = read(0, &ch, 1);
if (n == 1)
return ch;
return n;
}
#elif HAVE_CONIO_H
if(kbhit())
return(getch());
#endif
return -1;
}
static int decode_interrupt_cb(void)
{
return q_pressed || (q_pressed = read_key() == 'q');
}
static int ffmpeg_exit(int ret)
{
int i;
/* close files */
for(i=0;i<nb_output_files;i++) {
/* maybe av_close_output_file ??? */
AVFormatContext *s = output_files[i];
int j;
if (!(s->oformat->flags & AVFMT_NOFILE) && s->pb)
url_fclose(s->pb);
for(j=0;j<s->nb_streams;j++) {
av_metadata_free(&s->streams[j]->metadata);
av_free(s->streams[j]->codec);
av_free(s->streams[j]);
}
for(j=0;j<s->nb_programs;j++) {
av_metadata_free(&s->programs[j]->metadata);
}
for(j=0;j<s->nb_chapters;j++) {
av_metadata_free(&s->chapters[j]->metadata);
}
av_metadata_free(&s->metadata);
av_free(s);
}
for(i=0;i<nb_input_files;i++)
av_close_input_file(input_files[i]);
av_free(intra_matrix);
av_free(inter_matrix);
if (vstats_file)
fclose(vstats_file);
av_free(vstats_filename);
av_free(opt_names);
av_free(video_codec_name);
av_free(audio_codec_name);
av_free(subtitle_codec_name);
av_free(video_standard);
for (i=0;i<AVMEDIA_TYPE_NB;i++)
av_free(avcodec_opts[i]);
av_free(avformat_opts);
av_free(sws_opts);
av_free(audio_buf);
av_free(audio_out);
allocated_audio_buf_size= allocated_audio_out_size= 0;
av_free(samples);
#if CONFIG_AVFILTER
avfilter_uninit();
#endif
if (received_sigterm) {
fprintf(stderr,
"Received signal %d: terminating.\n",
(int) received_sigterm);
exit (255);
}
exit(ret); /* not all OS-es handle main() return value */
return ret;
}
static void choose_sample_fmt(AVStream *st, AVCodec *codec)
{
if(codec && codec->sample_fmts){
const enum SampleFormat *p= codec->sample_fmts;
for(; *p!=-1; p++){
if(*p == st->codec->sample_fmt)
break;
}
if(*p == -1)
st->codec->sample_fmt = codec->sample_fmts[0];
}
}
static void choose_sample_rate(AVStream *st, AVCodec *codec)
{
if(codec && codec->supported_samplerates){
const int *p= codec->supported_samplerates;
int best=0;
int best_dist=INT_MAX;
for(; *p; p++){
int dist= abs(st->codec->sample_rate - *p);
if(dist < best_dist){
best_dist= dist;
best= *p;
}
}
if(best_dist){
av_log(st->codec, AV_LOG_WARNING, "Requested sampling rate unsupported using closest supported (%d)\n", best);
}
st->codec->sample_rate= best;
}
}
static void choose_pixel_fmt(AVStream *st, AVCodec *codec)
{
if(codec && codec->pix_fmts){
const enum PixelFormat *p= codec->pix_fmts;
for(; *p!=-1; p++){
if(*p == st->codec->pix_fmt)
break;
}
if(*p == -1
&& !( st->codec->codec_id==CODEC_ID_MJPEG
&& st->codec->strict_std_compliance <= FF_COMPLIANCE_UNOFFICIAL
&& ( st->codec->pix_fmt == PIX_FMT_YUV420P
|| st->codec->pix_fmt == PIX_FMT_YUV422P)))
st->codec->pix_fmt = codec->pix_fmts[0];
}
}
static int read_ffserver_streams(AVFormatContext *s, const char *filename)
{
int i, err;
AVFormatContext *ic;
int nopts = 0;
err = av_open_input_file(&ic, filename, NULL, FFM_PACKET_SIZE, NULL);
if (err < 0)
return err;
/* copy stream format */
s->nb_streams = ic->nb_streams;
for(i=0;i<ic->nb_streams;i++) {
AVStream *st;
AVCodec *codec;
// FIXME: a more elegant solution is needed
st = av_mallocz(sizeof(AVStream));
memcpy(st, ic->streams[i], sizeof(AVStream));
st->codec = avcodec_alloc_context();
if (!st->codec) {
print_error(filename, AVERROR(ENOMEM));
ffmpeg_exit(1);
}
avcodec_copy_context(st->codec, ic->streams[i]->codec);
s->streams[i] = st;
codec = avcodec_find_encoder(st->codec->codec_id);
if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
if (audio_stream_copy) {
st->stream_copy = 1;
} else
choose_sample_fmt(st, codec);
} else if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
if (video_stream_copy) {
st->stream_copy = 1;
} else
choose_pixel_fmt(st, codec);
}
if(!st->codec->thread_count)
st->codec->thread_count = 1;
if(st->codec->thread_count>1)
avcodec_thread_init(st->codec, st->codec->thread_count);
if(st->codec->flags & CODEC_FLAG_BITEXACT)
nopts = 1;
}
if (!nopts)
s->timestamp = av_gettime();
av_close_input_file(ic);
return 0;
}
static double
get_sync_ipts(const AVOutputStream *ost)
{
const AVInputStream *ist = ost->sync_ist;
return (double)(ist->pts - start_time)/AV_TIME_BASE;
}
static void write_frame(AVFormatContext *s, AVPacket *pkt, AVCodecContext *avctx, AVBitStreamFilterContext *bsfc){
int ret;
while(bsfc){
AVPacket new_pkt= *pkt;
int a= av_bitstream_filter_filter(bsfc, avctx, NULL,
&new_pkt.data, &new_pkt.size,
pkt->data, pkt->size,
pkt->flags & AV_PKT_FLAG_KEY);
if(a>0){
av_free_packet(pkt);
new_pkt.destruct= av_destruct_packet;
} else if(a<0){
fprintf(stderr, "%s failed for stream %d, codec %s",
bsfc->filter->name, pkt->stream_index,
avctx->codec ? avctx->codec->name : "copy");
print_error("", a);
if (exit_on_error)
ffmpeg_exit(1);
}
*pkt= new_pkt;
bsfc= bsfc->next;
}
ret= av_interleaved_write_frame(s, pkt);
if(ret < 0){
print_error("av_interleaved_write_frame()", ret);
ffmpeg_exit(1);
}
}
#define MAX_AUDIO_PACKET_SIZE (128 * 1024)
static void do_audio_out(AVFormatContext *s,
AVOutputStream *ost,
AVInputStream *ist,
unsigned char *buf, int size)
{
uint8_t *buftmp;
int64_t audio_out_size, audio_buf_size;
int64_t allocated_for_size= size;
int size_out, frame_bytes, ret;
AVCodecContext *enc= ost->st->codec;
AVCodecContext *dec= ist->st->codec;
int osize= av_get_bits_per_sample_format(enc->sample_fmt)/8;
int isize= av_get_bits_per_sample_format(dec->sample_fmt)/8;
const int coded_bps = av_get_bits_per_sample(enc->codec->id);
need_realloc:
audio_buf_size= (allocated_for_size + isize*dec->channels - 1) / (isize*dec->channels);
audio_buf_size= (audio_buf_size*enc->sample_rate + dec->sample_rate) / dec->sample_rate;
audio_buf_size= audio_buf_size*2 + 10000; //safety factors for the deprecated resampling API
audio_buf_size= FFMAX(audio_buf_size, enc->frame_size);
audio_buf_size*= osize*enc->channels;
audio_out_size= FFMAX(audio_buf_size, enc->frame_size * osize * enc->channels);
if(coded_bps > 8*osize)
audio_out_size= audio_out_size * coded_bps / (8*osize);
audio_out_size += FF_MIN_BUFFER_SIZE;
if(audio_out_size > INT_MAX || audio_buf_size > INT_MAX){
fprintf(stderr, "Buffer sizes too large\n");
ffmpeg_exit(1);
}
av_fast_malloc(&audio_buf, &allocated_audio_buf_size, audio_buf_size);
av_fast_malloc(&audio_out, &allocated_audio_out_size, audio_out_size);
if (!audio_buf || !audio_out){
fprintf(stderr, "Out of memory in do_audio_out\n");
ffmpeg_exit(1);
}
if (enc->channels != dec->channels)
ost->audio_resample = 1;
if (ost->audio_resample && !ost->resample) {
if (dec->sample_fmt != SAMPLE_FMT_S16)
fprintf(stderr, "Warning, using s16 intermediate sample format for resampling\n");
ost->resample = av_audio_resample_init(enc->channels, dec->channels,
enc->sample_rate, dec->sample_rate,
enc->sample_fmt, dec->sample_fmt,
16, 10, 0, 0.8);
if (!ost->resample) {
fprintf(stderr, "Can not resample %d channels @ %d Hz to %d channels @ %d Hz\n",
dec->channels, dec->sample_rate,
enc->channels, enc->sample_rate);
ffmpeg_exit(1);
}
}
#define MAKE_SFMT_PAIR(a,b) ((a)+SAMPLE_FMT_NB*(b))
if (!ost->audio_resample && dec->sample_fmt!=enc->sample_fmt &&
MAKE_SFMT_PAIR(enc->sample_fmt,dec->sample_fmt)!=ost->reformat_pair) {
if (ost->reformat_ctx)
av_audio_convert_free(ost->reformat_ctx);
ost->reformat_ctx = av_audio_convert_alloc(enc->sample_fmt, 1,
dec->sample_fmt, 1, NULL, 0);
if (!ost->reformat_ctx) {
fprintf(stderr, "Cannot convert %s sample format to %s sample format\n",
avcodec_get_sample_fmt_name(dec->sample_fmt),
avcodec_get_sample_fmt_name(enc->sample_fmt));
ffmpeg_exit(1);
}
ost->reformat_pair=MAKE_SFMT_PAIR(enc->sample_fmt,dec->sample_fmt);
}
if(audio_sync_method){
double delta = get_sync_ipts(ost) * enc->sample_rate - ost->sync_opts
- av_fifo_size(ost->fifo)/(ost->st->codec->channels * 2);
double idelta= delta*ist->st->codec->sample_rate / enc->sample_rate;
int byte_delta= ((int)idelta)*2*ist->st->codec->channels;
//FIXME resample delay
if(fabs(delta) > 50){
if(ist->is_start || fabs(delta) > audio_drift_threshold*enc->sample_rate){
if(byte_delta < 0){
byte_delta= FFMAX(byte_delta, -size);
size += byte_delta;
buf -= byte_delta;
if(verbose > 2)
fprintf(stderr, "discarding %d audio samples\n", (int)-delta);
if(!size)
return;
ist->is_start=0;
}else{
static uint8_t *input_tmp= NULL;
input_tmp= av_realloc(input_tmp, byte_delta + size);
if(byte_delta > allocated_for_size - size){
allocated_for_size= byte_delta + (int64_t)size;
goto need_realloc;
}
ist->is_start=0;
memset(input_tmp, 0, byte_delta);
memcpy(input_tmp + byte_delta, buf, size);
buf= input_tmp;
size += byte_delta;
if(verbose > 2)
fprintf(stderr, "adding %d audio samples of silence\n", (int)delta);
}
}else if(audio_sync_method>1){
int comp= av_clip(delta, -audio_sync_method, audio_sync_method);
assert(ost->audio_resample);
if(verbose > 2)
fprintf(stderr, "compensating audio timestamp drift:%f compensation:%d in:%d\n", delta, comp, enc->sample_rate);
// fprintf(stderr, "drift:%f len:%d opts:%"PRId64" ipts:%"PRId64" fifo:%d\n", delta, -1, ost->sync_opts, (int64_t)(get_sync_ipts(ost) * enc->sample_rate), av_fifo_size(ost->fifo)/(ost->st->codec->channels * 2));
av_resample_compensate(*(struct AVResampleContext**)ost->resample, comp, enc->sample_rate);
}
}
}else
ost->sync_opts= lrintf(get_sync_ipts(ost) * enc->sample_rate)
- av_fifo_size(ost->fifo)/(ost->st->codec->channels * 2); //FIXME wrong
if (ost->audio_resample) {
buftmp = audio_buf;
size_out = audio_resample(ost->resample,
(short *)buftmp, (short *)buf,
size / (ist->st->codec->channels * isize));
size_out = size_out * enc->channels * osize;
} else {
buftmp = buf;
size_out = size;
}
if (!ost->audio_resample && dec->sample_fmt!=enc->sample_fmt) {
const void *ibuf[6]= {buftmp};
void *obuf[6]= {audio_buf};
int istride[6]= {isize};
int ostride[6]= {osize};
int len= size_out/istride[0];
if (av_audio_convert(ost->reformat_ctx, obuf, ostride, ibuf, istride, len)<0) {
printf("av_audio_convert() failed\n");
if (exit_on_error)
ffmpeg_exit(1);
return;
}
buftmp = audio_buf;
size_out = len*osize;
}
/* now encode as many frames as possible */
if (enc->frame_size > 1) {
/* output resampled raw samples */
if (av_fifo_realloc2(ost->fifo, av_fifo_size(ost->fifo) + size_out) < 0) {
fprintf(stderr, "av_fifo_realloc2() failed\n");
ffmpeg_exit(1);
}
av_fifo_generic_write(ost->fifo, buftmp, size_out, NULL);
frame_bytes = enc->frame_size * osize * enc->channels;
while (av_fifo_size(ost->fifo) >= frame_bytes) {
AVPacket pkt;
av_init_packet(&pkt);
av_fifo_generic_read(ost->fifo, audio_buf, frame_bytes, NULL);
//FIXME pass ost->sync_opts as AVFrame.pts in avcodec_encode_audio()
ret = avcodec_encode_audio(enc, audio_out, audio_out_size,
(short *)audio_buf);
if (ret < 0) {
fprintf(stderr, "Audio encoding failed\n");
ffmpeg_exit(1);
}
audio_size += ret;
pkt.stream_index= ost->index;
pkt.data= audio_out;
pkt.size= ret;
if(enc->coded_frame && enc->coded_frame->pts != AV_NOPTS_VALUE)
pkt.pts= av_rescale_q(enc->coded_frame->pts, enc->time_base, ost->st->time_base);
pkt.flags |= AV_PKT_FLAG_KEY;
write_frame(s, &pkt, ost->st->codec, bitstream_filters[ost->file_index][pkt.stream_index]);
ost->sync_opts += enc->frame_size;
}
} else {
AVPacket pkt;
av_init_packet(&pkt);
ost->sync_opts += size_out / (osize * enc->channels);
/* output a pcm frame */
/* determine the size of the coded buffer */
size_out /= osize;
if (coded_bps)
size_out = size_out*coded_bps/8;
if(size_out > audio_out_size){
fprintf(stderr, "Internal error, buffer size too small\n");
ffmpeg_exit(1);
}
//FIXME pass ost->sync_opts as AVFrame.pts in avcodec_encode_audio()
ret = avcodec_encode_audio(enc, audio_out, size_out,
(short *)buftmp);
if (ret < 0) {