FFmpeg  2.1.1
bktr.c
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1 /*
2  * *BSD video grab interface
3  * Copyright (c) 2002 Steve O'Hara-Smith
4  * based on
5  * Linux video grab interface
6  * Copyright (c) 2000,2001 Gerard Lantau
7  * and
8  * simple_grab.c Copyright (c) 1999 Roger Hardiman
9  *
10  * This file is part of FFmpeg.
11  *
12  * FFmpeg is free software; you can redistribute it and/or
13  * modify it under the terms of the GNU Lesser General Public
14  * License as published by the Free Software Foundation; either
15  * version 2.1 of the License, or (at your option) any later version.
16  *
17  * FFmpeg is distributed in the hope that it will be useful,
18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
20  * Lesser General Public License for more details.
21  *
22  * You should have received a copy of the GNU Lesser General Public
23  * License along with FFmpeg; if not, write to the Free Software
24  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
25  */
26 
27 #include "libavformat/internal.h"
28 #include "libavutil/internal.h"
29 #include "libavutil/log.h"
30 #include "libavutil/opt.h"
31 #include "libavutil/parseutils.h"
32 #include "libavutil/time.h"
33 #if HAVE_DEV_BKTR_IOCTL_METEOR_H && HAVE_DEV_BKTR_IOCTL_BT848_H
34 # include <dev/bktr/ioctl_meteor.h>
35 # include <dev/bktr/ioctl_bt848.h>
36 #elif HAVE_MACHINE_IOCTL_METEOR_H && HAVE_MACHINE_IOCTL_BT848_H
37 # include <machine/ioctl_meteor.h>
38 # include <machine/ioctl_bt848.h>
39 #elif HAVE_DEV_VIDEO_METEOR_IOCTL_METEOR_H && HAVE_DEV_VIDEO_BKTR_IOCTL_BT848_H
40 # include <dev/video/meteor/ioctl_meteor.h>
41 # include <dev/video/bktr/ioctl_bt848.h>
42 #elif HAVE_DEV_IC_BT8XX_H
43 # include <dev/ic/bt8xx.h>
44 #endif
45 #include <unistd.h>
46 #include <fcntl.h>
47 #include <sys/ioctl.h>
48 #include <sys/mman.h>
49 #include <sys/time.h>
50 #include <signal.h>
51 #include <stdint.h>
52 #include "avdevice.h"
53 
54 typedef struct {
55  AVClass *class;
56  int video_fd;
57  int tuner_fd;
58  int width, height;
59  uint64_t per_frame;
60  int standard;
61  char *framerate; /**< Set by a private option. */
62 } VideoData;
63 
64 
65 #define PAL 1
66 #define PALBDGHI 1
67 #define NTSC 2
68 #define NTSCM 2
69 #define SECAM 3
70 #define PALN 4
71 #define PALM 5
72 #define NTSCJ 6
73 
74 /* PAL is 768 x 576. NTSC is 640 x 480 */
75 #define PAL_HEIGHT 576
76 #define SECAM_HEIGHT 576
77 #define NTSC_HEIGHT 480
78 
79 #ifndef VIDEO_FORMAT
80 #define VIDEO_FORMAT NTSC
81 #endif
82 
83 static int bktr_dev[] = { METEOR_DEV0, METEOR_DEV1, METEOR_DEV2,
84  METEOR_DEV3, METEOR_DEV_SVIDEO };
85 
88 uint64_t last_frame_time;
89 volatile sig_atomic_t nsignals;
90 
91 
92 static void catchsignal(int signal)
93 {
94  nsignals++;
95  return;
96 }
97 
98 static av_cold int bktr_init(const char *video_device, int width, int height,
99  int format, int *video_fd, int *tuner_fd, int idev, double frequency)
100 {
101  struct meteor_geomet geo;
102  int h_max;
103  long ioctl_frequency;
104  char *arg;
105  int c;
106  struct sigaction act = { {0} }, old;
107 
108  if (idev < 0 || idev > 4)
109  {
110  arg = getenv ("BKTR_DEV");
111  if (arg)
112  idev = atoi (arg);
113  if (idev < 0 || idev > 4)
114  idev = 1;
115  }
116 
117  if (format < 1 || format > 6)
118  {
119  arg = getenv ("BKTR_FORMAT");
120  if (arg)
121  format = atoi (arg);
122  if (format < 1 || format > 6)
123  format = VIDEO_FORMAT;
124  }
125 
126  if (frequency <= 0)
127  {
128  arg = getenv ("BKTR_FREQUENCY");
129  if (arg)
130  frequency = atof (arg);
131  if (frequency <= 0)
132  frequency = 0.0;
133  }
134 
135  sigemptyset(&act.sa_mask);
136  act.sa_handler = catchsignal;
137  sigaction(SIGUSR1, &act, &old);
138 
139  *tuner_fd = avpriv_open("/dev/tuner0", O_RDONLY);
140  if (*tuner_fd < 0)
141  av_log(NULL, AV_LOG_ERROR, "Warning. Tuner not opened, continuing: %s\n", strerror(errno));
142 
143  *video_fd = avpriv_open(video_device, O_RDONLY);
144  if (*video_fd < 0) {
145  av_log(NULL, AV_LOG_ERROR, "%s: %s\n", video_device, strerror(errno));
146  return -1;
147  }
148 
149  geo.rows = height;
150  geo.columns = width;
151  geo.frames = 1;
152  geo.oformat = METEOR_GEO_YUV_422 | METEOR_GEO_YUV_12;
153 
154  switch (format) {
155  case PAL: h_max = PAL_HEIGHT; c = BT848_IFORM_F_PALBDGHI; break;
156  case PALN: h_max = PAL_HEIGHT; c = BT848_IFORM_F_PALN; break;
157  case PALM: h_max = PAL_HEIGHT; c = BT848_IFORM_F_PALM; break;
158  case SECAM: h_max = SECAM_HEIGHT; c = BT848_IFORM_F_SECAM; break;
159  case NTSC: h_max = NTSC_HEIGHT; c = BT848_IFORM_F_NTSCM; break;
160  case NTSCJ: h_max = NTSC_HEIGHT; c = BT848_IFORM_F_NTSCJ; break;
161  default: h_max = PAL_HEIGHT; c = BT848_IFORM_F_PALBDGHI; break;
162  }
163 
164  if (height <= h_max / 2)
165  geo.oformat |= METEOR_GEO_EVEN_ONLY;
166 
167  if (ioctl(*video_fd, METEORSETGEO, &geo) < 0) {
168  av_log(NULL, AV_LOG_ERROR, "METEORSETGEO: %s\n", strerror(errno));
169  return -1;
170  }
171 
172  if (ioctl(*video_fd, BT848SFMT, &c) < 0) {
173  av_log(NULL, AV_LOG_ERROR, "BT848SFMT: %s\n", strerror(errno));
174  return -1;
175  }
176 
177  c = bktr_dev[idev];
178  if (ioctl(*video_fd, METEORSINPUT, &c) < 0) {
179  av_log(NULL, AV_LOG_ERROR, "METEORSINPUT: %s\n", strerror(errno));
180  return -1;
181  }
182 
183  video_buf_size = width * height * 12 / 8;
184 
185  video_buf = (uint8_t *)mmap((caddr_t)0, video_buf_size,
186  PROT_READ, MAP_SHARED, *video_fd, (off_t)0);
187  if (video_buf == MAP_FAILED) {
188  av_log(NULL, AV_LOG_ERROR, "mmap: %s\n", strerror(errno));
189  return -1;
190  }
191 
192  if (frequency != 0.0) {
193  ioctl_frequency = (unsigned long)(frequency*16);
194  if (ioctl(*tuner_fd, TVTUNER_SETFREQ, &ioctl_frequency) < 0)
195  av_log(NULL, AV_LOG_ERROR, "TVTUNER_SETFREQ: %s\n", strerror(errno));
196  }
197 
198  c = AUDIO_UNMUTE;
199  if (ioctl(*tuner_fd, BT848_SAUDIO, &c) < 0)
200  av_log(NULL, AV_LOG_ERROR, "TVTUNER_SAUDIO: %s\n", strerror(errno));
201 
202  c = METEOR_CAP_CONTINOUS;
203  ioctl(*video_fd, METEORCAPTUR, &c);
204 
205  c = SIGUSR1;
206  ioctl(*video_fd, METEORSSIGNAL, &c);
207 
208  return 0;
209 }
210 
211 static void bktr_getframe(uint64_t per_frame)
212 {
213  uint64_t curtime;
214 
215  curtime = av_gettime();
216  if (!last_frame_time
217  || ((last_frame_time + per_frame) > curtime)) {
218  if (!usleep(last_frame_time + per_frame + per_frame / 8 - curtime)) {
219  if (!nsignals)
220  av_log(NULL, AV_LOG_INFO,
221  "SLEPT NO signals - %d microseconds late\n",
222  (int)(av_gettime() - last_frame_time - per_frame));
223  }
224  }
225  nsignals = 0;
226  last_frame_time = curtime;
227 }
228 
229 
230 /* note: we support only one picture read at a time */
232 {
233  VideoData *s = s1->priv_data;
234 
235  if (av_new_packet(pkt, video_buf_size) < 0)
236  return AVERROR(EIO);
237 
239 
240  pkt->pts = av_gettime();
241  memcpy(pkt->data, video_buf, video_buf_size);
242 
243  return video_buf_size;
244 }
245 
247 {
248  VideoData *s = s1->priv_data;
249  AVStream *st;
250  AVRational framerate;
251  int ret = 0;
252 
253  if (!s->framerate)
254  switch (s->standard) {
255  case PAL: s->framerate = av_strdup("pal"); break;
256  case NTSC: s->framerate = av_strdup("ntsc"); break;
257  case SECAM: s->framerate = av_strdup("25"); break;
258  default:
259  av_log(s1, AV_LOG_ERROR, "Unknown standard.\n");
260  ret = AVERROR(EINVAL);
261  goto out;
262  }
263  if ((ret = av_parse_video_rate(&framerate, s->framerate)) < 0) {
264  av_log(s1, AV_LOG_ERROR, "Could not parse framerate '%s'.\n", s->framerate);
265  goto out;
266  }
267 
268  st = avformat_new_stream(s1, NULL);
269  if (!st) {
270  ret = AVERROR(ENOMEM);
271  goto out;
272  }
273  avpriv_set_pts_info(st, 64, 1, 1000000); /* 64 bits pts in use */
274 
275  s->per_frame = ((uint64_t)1000000 * framerate.den) / framerate.num;
276 
280  st->codec->width = s->width;
281  st->codec->height = s->height;
282  st->codec->time_base.den = framerate.num;
283  st->codec->time_base.num = framerate.den;
284 
285 
286  if (bktr_init(s1->filename, s->width, s->height, s->standard,
287  &s->video_fd, &s->tuner_fd, -1, 0.0) < 0) {
288  ret = AVERROR(EIO);
289  goto out;
290  }
291 
292  nsignals = 0;
293  last_frame_time = 0;
294 
295 out:
296  return ret;
297 }
298 
300 {
301  VideoData *s = s1->priv_data;
302  int c;
303 
304  c = METEOR_CAP_STOP_CONT;
305  ioctl(s->video_fd, METEORCAPTUR, &c);
306  close(s->video_fd);
307 
308  c = AUDIO_MUTE;
309  ioctl(s->tuner_fd, BT848_SAUDIO, &c);
310  close(s->tuner_fd);
311 
312  munmap((caddr_t)video_buf, video_buf_size);
313 
314  return 0;
315 }
316 
317 #define OFFSET(x) offsetof(VideoData, x)
318 #define DEC AV_OPT_FLAG_DECODING_PARAM
319 static const AVOption options[] = {
320  { "standard", "", offsetof(VideoData, standard), AV_OPT_TYPE_INT, {.i64 = VIDEO_FORMAT}, PAL, NTSCJ, AV_OPT_FLAG_DECODING_PARAM, "standard" },
321  { "PAL", "", 0, AV_OPT_TYPE_CONST, {.i64 = PAL}, 0, 0, AV_OPT_FLAG_DECODING_PARAM, "standard" },
322  { "NTSC", "", 0, AV_OPT_TYPE_CONST, {.i64 = NTSC}, 0, 0, AV_OPT_FLAG_DECODING_PARAM, "standard" },
323  { "SECAM", "", 0, AV_OPT_TYPE_CONST, {.i64 = SECAM}, 0, 0, AV_OPT_FLAG_DECODING_PARAM, "standard" },
324  { "PALN", "", 0, AV_OPT_TYPE_CONST, {.i64 = PALN}, 0, 0, AV_OPT_FLAG_DECODING_PARAM, "standard" },
325  { "PALM", "", 0, AV_OPT_TYPE_CONST, {.i64 = PALM}, 0, 0, AV_OPT_FLAG_DECODING_PARAM, "standard" },
326  { "NTSCJ", "", 0, AV_OPT_TYPE_CONST, {.i64 = NTSCJ}, 0, 0, AV_OPT_FLAG_DECODING_PARAM, "standard" },
327  { "video_size", "A string describing frame size, such as 640x480 or hd720.", OFFSET(width), AV_OPT_TYPE_IMAGE_SIZE, {.str = "vga"}, 0, 0, DEC },
328  { "framerate", "", OFFSET(framerate), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, DEC },
329  { NULL },
330 };
331 
332 static const AVClass bktr_class = {
333  .class_name = "BKTR grab interface",
334  .item_name = av_default_item_name,
335  .option = options,
336  .version = LIBAVUTIL_VERSION_INT,
337 };
338 
340  .name = "bktr",
341  .long_name = NULL_IF_CONFIG_SMALL("video grab"),
342  .priv_data_size = sizeof(VideoData),
346  .flags = AVFMT_NOFILE,
347  .priv_class = &bktr_class,
348 };
const char * s
Definition: avisynth_c.h:668
AVOption.
Definition: opt.h:253
int tuner_fd
Definition: bktr.c:57
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:478
#define LIBAVUTIL_VERSION_INT
Definition: avcodec.h:820
uint8_t * video_buf
Definition: bktr.c:86
char * av_strdup(const char *s) av_malloc_attrib
Duplicate the string s.
Definition: mem.c:256
void avpriv_set_pts_info(AVStream *s, int pts_wrap_bits, unsigned int pts_num, unsigned int pts_den)
Set the time base and wrapping info for a given stream.
Definition: utils.c:3922
#define SECAM_HEIGHT
Definition: bktr.c:76
size_t video_buf_size
Definition: bktr.c:87
AVCodecContext * codec
Codec context associated with this stream.
Definition: avformat.h:686
int num
numerator
Definition: rational.h:44
static int bktr_dev[]
Definition: bktr.c:83
void av_log(void *avcl, int level, const char *fmt,...) av_printf_format(3
Send the specified message to the log if the level is less than or equal to the current av_log_level...
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:1342
#define DEC
Definition: bktr.c:318
AVInputFormat ff_bktr_demuxer
Definition: bktr.c:339
#define av_cold
Definition: avcodec.h:653
int video_fd
Definition: bktr.c:56
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented...
Definition: avcodec.h:1265
Format I/O context.
Definition: avformat.h:968
const char * av_default_item_name(void *ctx)
Return the context name.
Definition: log.c:145
uint8_t
const char * class_name
The name of the class; usually it is the same name as the context structure type to which the AVClass...
Definition: log.h:55
static void bktr_getframe(uint64_t per_frame)
Definition: bktr.c:211
int avpriv_open(const char *filename, int flags,...)
A wrapper for open() setting O_CLOEXEC.
Definition: file_open.c:71
static av_cold int read_close(AVFormatContext *ctx)
Definition: libcdio.c:145
#define NTSC_HEIGHT
Definition: bktr.c:77
#define AVFMT_NOFILE
Demuxer will use avio_open, no opened file should be provided by the caller.
Definition: avformat.h:347
char * framerate
Set by a private option.
Definition: bktr.c:61
volatile sig_atomic_t nsignals
Definition: bktr.c:89
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:3348
const OptionDef options[]
Definition: ffserver.c:4682
int av_new_packet(AVPacket *pkt, int size)
Allocate the payload of a packet and initialize its fields with default values.
Definition: avpacket.c:83
static const AVClass bktr_class
Definition: bktr.c:332
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: avcodec.h:4147
void * priv_data
Format private data.
Definition: avformat.h:988
char filename[1024]
input or output filename
Definition: avformat.h:1018
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:151
const char * arg
Definition: jacosubdec.c:69
int width
Definition: bktr.c:58
Definition: bktr.c:54
static void catchsignal(int signal)
Definition: bktr.c:92
int av_parse_video_rate(AVRational *rate, const char *str)
Parse str and store the detected values in *rate.
Definition: parseutils.c:168
#define PAL_HEIGHT
Definition: bktr.c:75
common internal API header
int height
Definition: bktr.c:58
int64_t av_gettime(void)
Get the current time in microseconds.
Definition: time.c:39
ret
Definition: avfilter.c:961
int width
picture width / height.
Definition: avcodec.h:1314
uint64_t per_frame
Definition: bktr.c:59
uint64_t last_frame_time
Definition: bktr.c:88
#define SECAM
Definition: bktr.c:69
static int read_header(FFV1Context *f)
Definition: ffv1dec.c:592
Stream structure.
Definition: avformat.h:667
static int grab_read_packet(AVFormatContext *s1, AVPacket *pkt)
Definition: bktr.c:231
planar YUV 4:2:0, 12bpp, (1 Cr &amp; Cb sample per 2x2 Y samples)
Definition: avcodec.h:4534
static int width
Definition: utils.c:158
#define AV_LOG_INFO
Standard information.
Definition: avcodec.h:4158
enum AVMediaType codec_type
Definition: avcodec.h:1154
enum AVCodecID codec_id
Definition: avcodec.h:1157
static av_cold int bktr_init(const char *video_device, int width, int height, int format, int *video_fd, int *tuner_fd, int idev, double frequency)
Definition: bktr.c:98
static void close(AVCodecParserContext *s)
Definition: h264_parser.c:538
Main libavdevice API header.
static int read_packet(AVFormatContext *ctx, AVPacket *pkt)
Definition: libcdio.c:114
BYTE int const BYTE int int int height
Definition: avisynth_c.h:713
int standard
Definition: bktr.c:60
Describe the class of an AVClass context structure.
Definition: log.h:50
#define NTSC
Definition: bktr.c:67
rational number numerator/denominator
Definition: rational.h:43
uint8_t * data
Definition: avcodec.h:1063
static int grab_read_header(AVFormatContext *s1)
Definition: bktr.c:246
#define s1
Definition: regdef.h:38
offset must point to two consecutive integers
Definition: opt.h:230
#define PALN
Definition: bktr.c:70
#define VIDEO_FORMAT
Definition: bktr.c:80
static int flags
Definition: cpu.c:45
#define AV_OPT_FLAG_DECODING_PARAM
a generic parameter which can be set by the user for demuxing or decoding
Definition: opt.h:284
#define OFFSET(x)
Definition: bktr.c:317
#define PALM
Definition: bktr.c:71
static double c[64]
#define NTSCJ
Definition: bktr.c:72
int den
denominator
Definition: rational.h:45
uint8_t pi<< 24) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_U8, uint8_t,(*(constuint8_t *) pi-0x80)*(1.0f/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_U8, uint8_t,(*(constuint8_t *) pi-0x80)*(1.0/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S16, int16_t,(*(constint16_t *) pi >>8)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S16, int16_t,*(constint16_t *) pi *(1.0f/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S16, int16_t,*(constint16_t *) pi *(1.0/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S32, int32_t,(*(constint32_t *) pi >>24)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S32, int32_t,*(constint32_t *) pi *(1.0f/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S32, int32_t,*(constint32_t *) pi *(1.0/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_FLT, float, av_clip_uint8(lrintf(*(constfloat *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_FLT, float, av_clip_int16(lrintf(*(constfloat *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_FLT, float, av_clipl_int32(llrintf(*(constfloat *) pi *(1U<< 31)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_DBL, double, av_clip_uint8(lrint(*(constdouble *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_DBL, double, av_clip_int16(lrint(*(constdouble *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_DBL, double, av_clipl_int32(llrint(*(constdouble *) pi *(1U<< 31))))#defineSET_CONV_FUNC_GROUP(ofmt, ifmt) staticvoidset_generic_function(AudioConvert *ac){}voidff_audio_convert_free(AudioConvert **ac){return;ff_dither_free(&(*ac) ->dc);av_freep(ac);}AudioConvert *ff_audio_convert_alloc(AVAudioResampleContext *avr, enumAVSampleFormatout_fmt, enumAVSampleFormatin_fmt, intchannels, intsample_rate, intapply_map){AudioConvert *ac;intin_planar, out_planar;ac=av_mallocz(sizeof(*ac));returnNULL;ac->avr=avr;ac->out_fmt=out_fmt;ac->in_fmt=in_fmt;ac->channels=channels;ac->apply_map=apply_map;if(avr->dither_method!=AV_RESAMPLE_DITHER_NONE &&av_get_packed_sample_fmt(out_fmt)==AV_SAMPLE_FMT_S16 &&av_get_bytes_per_sample(in_fmt)>2){ac->dc=ff_dither_alloc(avr, out_fmt, in_fmt, channels, sample_rate, apply_map);if(!ac->dc){av_free(ac);returnNULL;}returnac;}in_planar=av_sample_fmt_is_planar(in_fmt);out_planar=av_sample_fmt_is_planar(out_fmt);if(in_planar==out_planar){ac->func_type=CONV_FUNC_TYPE_FLAT;ac->planes=in_planar?ac->channels:1;}elseif(in_planar) ac->func_type=CONV_FUNC_TYPE_INTERLEAVE;elseac->func_type=CONV_FUNC_TYPE_DEINTERLEAVE;set_generic_function(ac);ff_audio_convert_init_arm(ac);ff_audio_convert_init_x86(ac);returnac;}intff_audio_convert(AudioConvert *ac, AudioData *out, AudioData *in){intuse_generic=1;intlen=in->nb_samples;intp;if(ac->dc){av_dlog(ac->avr,"%dsamples-audio_convert:%sto%s(dithered)\n", len, av_get_sample_fmt_name(ac->in_fmt), av_get_sample_fmt_name(ac->out_fmt));returnff_convert_dither(ac-> out
#define PAL
Definition: bktr.c:65
#define AVERROR(e)
static AVPacket pkt
Definition: demuxing.c:52
static int grab_read_close(AVFormatContext *s1)
Definition: bktr.c:299
This structure stores compressed data.
Definition: avcodec.h:1040
int64_t pts
Presentation timestamp in AVStream-&gt;time_base units; the time at which the decompressed packet will b...
Definition: avcodec.h:1056