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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 Fabrice Bellard
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 VideoData {
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 const 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  int ret;
108  char errbuf[128];
109 
110  if (idev < 0 || idev > 4)
111  {
112  arg = getenv ("BKTR_DEV");
113  if (arg)
114  idev = atoi (arg);
115  if (idev < 0 || idev > 4)
116  idev = 1;
117  }
118 
119  if (format < 1 || format > 6)
120  {
121  arg = getenv ("BKTR_FORMAT");
122  if (arg)
123  format = atoi (arg);
124  if (format < 1 || format > 6)
125  format = VIDEO_FORMAT;
126  }
127 
128  if (frequency <= 0)
129  {
130  arg = getenv ("BKTR_FREQUENCY");
131  if (arg)
132  frequency = atof (arg);
133  if (frequency <= 0)
134  frequency = 0.0;
135  }
136 
137  sigemptyset(&act.sa_mask);
138  act.sa_handler = catchsignal;
139  sigaction(SIGUSR1, &act, &old);
140 
141  *tuner_fd = avpriv_open("/dev/tuner0", O_RDONLY);
142  if (*tuner_fd < 0)
143  av_log(NULL, AV_LOG_ERROR, "Warning. Tuner not opened, continuing: %s\n", strerror(errno));
144 
145  *video_fd = avpriv_open(video_device, O_RDONLY);
146  if (*video_fd < 0) {
147  ret = AVERROR(errno);
148  av_strerror(ret, errbuf, sizeof(errbuf));
149  av_log(NULL, AV_LOG_ERROR, "%s: %s\n", video_device, errbuf);
150  return ret;
151  }
152 
153  geo.rows = height;
154  geo.columns = width;
155  geo.frames = 1;
156  geo.oformat = METEOR_GEO_YUV_422 | METEOR_GEO_YUV_12;
157 
158  switch (format) {
159  case PAL: h_max = PAL_HEIGHT; c = BT848_IFORM_F_PALBDGHI; break;
160  case PALN: h_max = PAL_HEIGHT; c = BT848_IFORM_F_PALN; break;
161  case PALM: h_max = PAL_HEIGHT; c = BT848_IFORM_F_PALM; break;
162  case SECAM: h_max = SECAM_HEIGHT; c = BT848_IFORM_F_SECAM; break;
163  case NTSC: h_max = NTSC_HEIGHT; c = BT848_IFORM_F_NTSCM; break;
164  case NTSCJ: h_max = NTSC_HEIGHT; c = BT848_IFORM_F_NTSCJ; break;
165  default: h_max = PAL_HEIGHT; c = BT848_IFORM_F_PALBDGHI; break;
166  }
167 
168  if (height <= h_max / 2)
169  geo.oformat |= METEOR_GEO_EVEN_ONLY;
170 
171  if (ioctl(*video_fd, METEORSETGEO, &geo) < 0) {
172  ret = AVERROR(errno);
173  av_strerror(ret, errbuf, sizeof(errbuf));
174  av_log(NULL, AV_LOG_ERROR, "METEORSETGEO: %s\n", errbuf);
175  return ret;
176  }
177 
178  if (ioctl(*video_fd, BT848SFMT, &c) < 0) {
179  ret = AVERROR(errno);
180  av_strerror(ret, errbuf, sizeof(errbuf));
181  av_log(NULL, AV_LOG_ERROR, "BT848SFMT: %s\n", errbuf);
182  return ret;
183  }
184 
185  c = bktr_dev[idev];
186  if (ioctl(*video_fd, METEORSINPUT, &c) < 0) {
187  ret = AVERROR(errno);
188  av_strerror(ret, errbuf, sizeof(errbuf));
189  av_log(NULL, AV_LOG_ERROR, "METEORSINPUT: %s\n", errbuf);
190  return ret;
191  }
192 
193  video_buf_size = width * height * 12 / 8;
194 
195  video_buf = (uint8_t *)mmap((caddr_t)0, video_buf_size,
196  PROT_READ, MAP_SHARED, *video_fd, (off_t)0);
197  if (video_buf == MAP_FAILED) {
198  ret = AVERROR(errno);
199  av_strerror(ret, errbuf, sizeof(errbuf));
200  av_log(NULL, AV_LOG_ERROR, "mmap: %s\n", errbuf);
201  return ret;
202  }
203 
204  if (frequency != 0.0) {
205  ioctl_frequency = (unsigned long)(frequency*16);
206  if (ioctl(*tuner_fd, TVTUNER_SETFREQ, &ioctl_frequency) < 0)
207  av_log(NULL, AV_LOG_ERROR, "TVTUNER_SETFREQ: %s\n", strerror(errno));
208  }
209 
210  c = AUDIO_UNMUTE;
211  if (ioctl(*tuner_fd, BT848_SAUDIO, &c) < 0)
212  av_log(NULL, AV_LOG_ERROR, "TVTUNER_SAUDIO: %s\n", strerror(errno));
213 
214  c = METEOR_CAP_CONTINOUS;
215  ioctl(*video_fd, METEORCAPTUR, &c);
216 
217  c = SIGUSR1;
218  ioctl(*video_fd, METEORSSIGNAL, &c);
219 
220  return 0;
221 }
222 
223 static void bktr_getframe(uint64_t per_frame)
224 {
225  uint64_t curtime;
226 
227  curtime = av_gettime();
228  if (!last_frame_time
229  || ((last_frame_time + per_frame) > curtime)) {
230  if (!usleep(last_frame_time + per_frame + per_frame / 8 - curtime)) {
231  if (!nsignals)
233  "SLEPT NO signals - %d microseconds late\n",
234  (int)(av_gettime() - last_frame_time - per_frame));
235  }
236  }
237  nsignals = 0;
238  last_frame_time = curtime;
239 }
240 
241 
242 /* note: we support only one picture read at a time */
244 {
245  VideoData *s = s1->priv_data;
246 
247  if (av_new_packet(pkt, video_buf_size) < 0)
248  return AVERROR(EIO);
249 
251 
252  pkt->pts = av_gettime();
253  memcpy(pkt->data, video_buf, video_buf_size);
254 
255  return video_buf_size;
256 }
257 
259 {
260  VideoData *s = s1->priv_data;
261  AVStream *st;
262  AVRational framerate;
263  int ret = 0;
264 
265  if (!s->framerate)
266  switch (s->standard) {
267  case PAL: s->framerate = av_strdup("pal"); break;
268  case NTSC: s->framerate = av_strdup("ntsc"); break;
269  case SECAM: s->framerate = av_strdup("25"); break;
270  default:
271  av_log(s1, AV_LOG_ERROR, "Unknown standard.\n");
272  ret = AVERROR(EINVAL);
273  goto out;
274  }
275  if ((ret = av_parse_video_rate(&framerate, s->framerate)) < 0) {
276  av_log(s1, AV_LOG_ERROR, "Could not parse framerate '%s'.\n", s->framerate);
277  goto out;
278  }
279 
280  st = avformat_new_stream(s1, NULL);
281  if (!st) {
282  ret = AVERROR(ENOMEM);
283  goto out;
284  }
285  avpriv_set_pts_info(st, 64, 1, 1000000); /* 64 bits pts in use */
286 
287  s->per_frame = ((uint64_t)1000000 * framerate.den) / framerate.num;
288 
292  st->codec->width = s->width;
293  st->codec->height = s->height;
294  st->codec->time_base.den = framerate.num;
295  st->codec->time_base.num = framerate.den;
296 
297 
298  if (bktr_init(s1->filename, s->width, s->height, s->standard,
299  &s->video_fd, &s->tuner_fd, -1, 0.0) < 0) {
300  ret = AVERROR(EIO);
301  goto out;
302  }
303 
304  nsignals = 0;
305  last_frame_time = 0;
306 
307 out:
308  return ret;
309 }
310 
312 {
313  VideoData *s = s1->priv_data;
314  int c;
315 
316  c = METEOR_CAP_STOP_CONT;
317  ioctl(s->video_fd, METEORCAPTUR, &c);
318  close(s->video_fd);
319 
320  c = AUDIO_MUTE;
321  ioctl(s->tuner_fd, BT848_SAUDIO, &c);
322  close(s->tuner_fd);
323 
324  munmap((caddr_t)video_buf, video_buf_size);
325 
326  return 0;
327 }
328 
329 #define OFFSET(x) offsetof(VideoData, x)
330 #define DEC AV_OPT_FLAG_DECODING_PARAM
331 static const AVOption options[] = {
332  { "standard", "", offsetof(VideoData, standard), AV_OPT_TYPE_INT, {.i64 = VIDEO_FORMAT}, PAL, NTSCJ, AV_OPT_FLAG_DECODING_PARAM, "standard" },
333  { "PAL", "", 0, AV_OPT_TYPE_CONST, {.i64 = PAL}, 0, 0, AV_OPT_FLAG_DECODING_PARAM, "standard" },
334  { "NTSC", "", 0, AV_OPT_TYPE_CONST, {.i64 = NTSC}, 0, 0, AV_OPT_FLAG_DECODING_PARAM, "standard" },
335  { "SECAM", "", 0, AV_OPT_TYPE_CONST, {.i64 = SECAM}, 0, 0, AV_OPT_FLAG_DECODING_PARAM, "standard" },
336  { "PALN", "", 0, AV_OPT_TYPE_CONST, {.i64 = PALN}, 0, 0, AV_OPT_FLAG_DECODING_PARAM, "standard" },
337  { "PALM", "", 0, AV_OPT_TYPE_CONST, {.i64 = PALM}, 0, 0, AV_OPT_FLAG_DECODING_PARAM, "standard" },
338  { "NTSCJ", "", 0, AV_OPT_TYPE_CONST, {.i64 = NTSCJ}, 0, 0, AV_OPT_FLAG_DECODING_PARAM, "standard" },
339  { "video_size", "A string describing frame size, such as 640x480 or hd720.", OFFSET(width), AV_OPT_TYPE_IMAGE_SIZE, {.str = "vga"}, 0, 0, DEC },
340  { "framerate", "", OFFSET(framerate), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, DEC },
341  { NULL },
342 };
343 
344 static const AVClass bktr_class = {
345  .class_name = "BKTR grab interface",
346  .item_name = av_default_item_name,
347  .option = options,
348  .version = LIBAVUTIL_VERSION_INT,
350 };
351 
353  .name = "bktr",
354  .long_name = NULL_IF_CONFIG_SMALL("video grab"),
355  .priv_data_size = sizeof(VideoData),
359  .flags = AVFMT_NOFILE,
360  .priv_class = &bktr_class,
361 };
#define NULL
Definition: coverity.c:32
const char * s
Definition: avisynth_c.h:631
int av_parse_video_rate(AVRational *rate, const char *arg)
Parse str and store the detected values in *rate.
Definition: parseutils.c:169
AVOption.
Definition: opt.h:255
int tuner_fd
Definition: bktr.c:57
#define LIBAVUTIL_VERSION_INT
Definition: version.h:62
uint8_t * video_buf
Definition: bktr.c:86
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:4006
#define SECAM_HEIGHT
Definition: bktr.c:76
size_t video_buf_size
Definition: bktr.c:87
int num
numerator
Definition: rational.h:44
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:1471
#define DEC
Definition: bktr.c:330
static AVPacket pkt
AVInputFormat ff_bktr_demuxer
Definition: bktr.c:352
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:1380
Format I/O context.
Definition: avformat.h:1272
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:72
uint8_t
#define av_cold
Definition: attributes.h:74
AVOptions.
static void bktr_getframe(uint64_t per_frame)
Definition: bktr.c:223
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:3672
int avpriv_open(const char *filename, int flags,...)
A wrapper for open() setting O_CLOEXEC.
Definition: file_open.c:66
uint8_t * data
Definition: avcodec.h:1173
static av_cold int read_close(AVFormatContext *ctx)
Definition: libcdio.c:145
#define NTSC_HEIGHT
Definition: bktr.c:77
char * framerate
Set by a private option.
Definition: bktr.c:61
volatile sig_atomic_t nsignals
Definition: bktr.c:89
#define av_log(a,...)
Main libavdevice API header.
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:344
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
av_default_item_name
#define AVERROR(e)
Definition: error.h:43
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:175
const char * arg
Definition: jacosubdec.c:66
int width
Definition: bktr.c:58
Definition: bktr.c:54
static void catchsignal(int signal)
Definition: bktr.c:92
#define PAL_HEIGHT
Definition: bktr.c:75
AVCodecContext * codec
Codec context associated with this stream.
Definition: avformat.h:861
common internal API header
int height
Definition: bktr.c:58
char filename[1024]
input or output filename
Definition: avformat.h:1348
ret
Definition: avfilter.c:974
int width
picture width / height.
Definition: avcodec.h:1430
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:620
int64_t av_gettime(void)
Get the current time in microseconds.
Definition: time.c:39
Stream structure.
Definition: avformat.h:842
static int read_packet(void *opaque, uint8_t *buf, int buf_size)
Definition: avio_reading.c:42
static int grab_read_packet(AVFormatContext *s1, AVPacket *pkt)
Definition: bktr.c:243
#define AV_LOG_INFO
Standard information.
Definition: log.h:187
enum AVMediaType codec_type
Definition: avcodec.h:1260
enum AVCodecID codec_id
Definition: avcodec.h:1269
char * av_strdup(const char *s)
Duplicate the string s.
Definition: mem.c:265
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
BYTE int const BYTE int int int height
Definition: avisynth_c.h:676
int standard
Definition: bktr.c:60
Describe the class of an AVClass context structure.
Definition: log.h:67
#define NTSC
Definition: bktr.c:67
rational number numerator/denominator
Definition: rational.h:43
#define AV_OPT_FLAG_DECODING_PARAM
a generic parameter which can be set by the user for demuxing or decoding
Definition: opt.h:286
static int grab_read_header(AVFormatContext *s1)
Definition: bktr.c:258
#define s1
Definition: regdef.h:38
offset must point to two consecutive integers
Definition: opt.h:232
misc parsing utilities
#define PALN
Definition: bktr.c:70
#define VIDEO_FORMAT
Definition: bktr.c:80
static const AVOption options[]
Definition: bktr.c:331
static int flags
Definition: cpu.c:47
int av_strerror(int errnum, char *errbuf, size_t errbuf_size)
Put a description of the AVERROR code errnum in errbuf.
Definition: error.c:68
#define OFFSET(x)
Definition: bktr.c:329
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
Definition: pixfmt.h:63
#define AVFMT_NOFILE
Demuxer will use avio_open, no opened file should be provided by the caller.
Definition: avformat.h:465
#define PALM
Definition: bktr.c:71
static double c[64]
#define NTSCJ
Definition: bktr.c:72
int den
denominator
Definition: rational.h:45
void * priv_data
Format private data.
Definition: avformat.h:1300
#define PAL
Definition: bktr.c:65
static const int bktr_dev[]
Definition: bktr.c:83
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){if(!*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));if(!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=ff_sample_fmt_is_planar(in_fmt, channels);out_planar=ff_sample_fmt_is_planar(out_fmt, channels);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);if(ARCH_AARCH64) ff_audio_convert_init_aarch64(ac);if(ARCH_ARM) ff_audio_convert_init_arm(ac);if(ARCH_X86) 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_log(ac->avr, AV_LOG_TRACE,"%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
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:628
static int grab_read_close(AVFormatContext *s1)
Definition: bktr.c:311
This structure stores compressed data.
Definition: avcodec.h:1150
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: avcodec.h:1166
static int width