4 * Copyright (C) 2001 Alex Beregszaszi
6 * Some ideas are based on xawtv/libng's grab-v4l.c written by
7 * Gerd Knorr <kraxel@bytesex.org>
9 * Multithreading, a/v sync and native ALSA support by
10 * Jindrich Makovicka <makovick@gmail.com>
12 * MJPEG hardware encoding support by
13 * Ivan Szanto <szivan@freemail.hu>
15 * CODE IS UNDER DEVELOPMENT, NO FEATURE REQUESTS PLEASE!
17 * This file is part of MPlayer.
19 * MPlayer is free software; you can redistribute it and/or modify
20 * it under the terms of the GNU General Public License as published by
21 * the Free Software Foundation; either version 2 of the License, or
22 * (at your option) any later version.
24 * MPlayer is distributed in the hope that it will be useful,
25 * but WITHOUT ANY WARRANTY; without even the implied warranty of
26 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
27 * GNU General Public License for more details.
29 * You should have received a copy of the GNU General Public License along
30 * with MPlayer; if not, write to the Free Software Foundation, Inc.,
31 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
39 #include <sys/ioctl.h>
40 #include <sys/types.h>
43 /* Necessary to prevent collisions between <linux/time.h> and <sys/time.h> when V4L2 is installed. */
46 #include <linux/videodev.h>
52 #ifdef HAVE_SYS_SYSINFO_H
53 #include <sys/sysinfo.h>
57 #include "libaf/af_format.h"
58 #include "libmpcodecs/img_format.h"
59 #include "libmpcodecs/dec_teletext.h"
60 #include "libvo/fastmemcpy.h"
61 #include "libvo/videodev_mjpeg.h"
67 static tvi_handle_t
*tvi_init_v4l(tv_param_t
* tv_param
);
69 const tvi_info_t tvi_info_v4l
= {
71 "Video 4 Linux input",
78 #define PAL_HEIGHT 576
81 #define NTSC_WIDTH 640
82 #define NTSC_HEIGHT 480
83 #define NTSC_FPS (30000.0/1001.0)
85 #define MAX_AUDIO_CHANNELS 10
87 #define VID_BUF_SIZE_IMMEDIATE 2
88 #define VIDEO_AVG_BUFFER_SIZE 600
94 struct video_capability capability
;
95 struct video_channel
*channels
;
97 struct video_tuner tuner
;
100 struct video_picture picture
;
101 int format
; /* output format */
107 struct video_mbuf mbuf
;
109 struct video_mmap
*buf
;
117 struct video_audio audio
[MAX_AUDIO_CHANNELS
];
118 int audio_channels
[MAX_AUDIO_CHANNELS
];
120 /* buffering stuff */
123 int audio_buffer_size
;
125 unsigned char *audio_ringbuffer
;
126 long long *audio_skew_buffer
;
127 volatile int audio_head
;
128 volatile int audio_tail
;
129 volatile int audio_cnt
;
130 volatile long long audio_skew
;
131 volatile double audio_skew_factor
;
132 volatile long long audio_skew_measure_time
;
133 volatile int audio_drop
;
136 int video_buffer_size_max
;
137 volatile int video_buffer_size_current
;
138 unsigned char **video_ringbuffer
;
139 long long *video_timebuffer
;
140 long long *video_avg_buffer
;
142 int video_interval_sum
;
143 volatile int video_head
;
144 volatile int video_tail
;
145 volatile int video_cnt
;
147 volatile int shutdown
;
149 pthread_t audio_grabber_thread
;
150 pthread_t video_grabber_thread
;
151 pthread_mutex_t audio_starter
;
152 pthread_mutex_t skew_mutex
;
153 pthread_mutex_t video_buffer_mutex
;
156 double audio_secs_per_block
;
157 long long audio_skew_total
;
158 long audio_recv_blocks_total
;
159 long audio_sent_blocks_total
;
165 pthread_t vbi_grabber_thread
;
168 tv_param_t
*tv_param
;
173 static const char *device_cap2name
[] = {
174 "capture", "tuner", "teletext", "overlay", "chromakey", "clipping",
175 "frameram", "scales", "monochrome", "subcapture", "mpeg-decoder",
176 "mpeg-encoder", "mjpeg-decoder", "mjpeg-encoder", NULL
179 static const char *device_palette2name
[] = {
180 "-", "grey", "hi240", "rgb16", "rgb24", "rgb32", "rgb15", "yuv422",
181 "yuyv", "uyvy", "yuv420", "yuv411", "raw", "yuv422p", "yuv411p",
184 #define PALETTE(x) ((x < sizeof(device_palette2name)/sizeof(char*)) ? device_palette2name[x] : "UNKNOWN")
186 static const struct {
193 } supported_norms
[]={
194 {"pal", TV_NORM_PAL
, VIDEO_TUNER_PAL
, VIDEO_MODE_PAL
, VIDEO_MODE_PAL
, PAL_FPS
},
195 {"ntsc", TV_NORM_NTSC
, VIDEO_TUNER_NTSC
, VIDEO_MODE_NTSC
, VIDEO_MODE_NTSC
, NTSC_FPS
},
196 {"secam", TV_NORM_SECAM
, VIDEO_TUNER_SECAM
, VIDEO_MODE_SECAM
,VIDEO_MODE_SECAM
,PAL_FPS
},
197 {"palnc", TV_NORM_PALNC
, VIDEO_TUNER_PAL
, VIDEO_MODE_PAL
, 3, PAL_FPS
},
198 {"palm", TV_NORM_PALM
, VIDEO_TUNER_NTSC
, VIDEO_MODE_NTSC
, 4, NTSC_FPS
},
199 {"paln", TV_NORM_PALN
, VIDEO_TUNER_PAL
, VIDEO_MODE_PAL
, 5, PAL_FPS
},
200 {"ntscjp",TV_NORM_NTSCJP
, VIDEO_TUNER_NTSC
, VIDEO_MODE_NTSC
, 6, NTSC_FPS
},
201 {"auto", -1, -1, -1, VIDEO_MODE_AUTO
, -1 },
202 {NULL
, -1, -1, -1, -1 }
205 static const char *norm2name(int mode
)
208 for(i
=0;supported_norms
[i
].name
; i
++)
209 if(supported_norms
[i
].input_norm
==mode
)
210 return supported_norms
[i
].name
;
214 static const char *audio_mode2name(int mode
)
217 case VIDEO_SOUND_MONO
:
219 case VIDEO_SOUND_STEREO
:
221 case VIDEO_SOUND_LANG1
:
223 case VIDEO_SOUND_LANG2
:
230 static void *audio_grabber(void *data
);
231 static void *video_grabber(void *data
);
233 static int palette2depth(int palette
)
238 case VIDEO_PALETTE_RGB555
:
240 case VIDEO_PALETTE_RGB565
:
242 case VIDEO_PALETTE_RGB24
:
244 case VIDEO_PALETTE_RGB32
:
247 case VIDEO_PALETTE_YUV411P
:
248 case VIDEO_PALETTE_YUV420P
:
249 case VIDEO_PALETTE_YUV410P
:
252 case VIDEO_PALETTE_YUV422P
:
253 case VIDEO_PALETTE_YUV422
:
254 case VIDEO_PALETTE_YUYV
:
255 case VIDEO_PALETTE_UYVY
:
256 case VIDEO_PALETTE_YUV420
:
257 case VIDEO_PALETTE_YUV411
:
263 static int format2palette(int format
)
268 return VIDEO_PALETTE_RGB555
;
270 return VIDEO_PALETTE_RGB565
;
272 return VIDEO_PALETTE_RGB24
;
274 return VIDEO_PALETTE_RGB32
;
277 return VIDEO_PALETTE_YUV420P
;
279 return VIDEO_PALETTE_YUV422
;
281 return VIDEO_PALETTE_UYVY
;
286 // sets and sanitizes audio buffer/block sizes
287 static void setup_audio_buffer_sizes(priv_t
*priv
)
289 int bytes_per_sample
= priv
->audio_in
.bytes_per_sample
;
291 // make the audio buffer at least 5 seconds long
292 priv
->audio_buffer_size
= 1 + 5*priv
->audio_in
.samplerate
293 *priv
->audio_in
.channels
294 *bytes_per_sample
/priv
->audio_in
.blocksize
;
295 if (priv
->audio_buffer_size
< 256) priv
->audio_buffer_size
= 256;
297 // make the skew buffer at least 1 second long
298 priv
->aud_skew_cnt
= 1 + 1*priv
->audio_in
.samplerate
299 *priv
->audio_in
.channels
300 *bytes_per_sample
/priv
->audio_in
.blocksize
;
301 if (priv
->aud_skew_cnt
< 16) priv
->aud_skew_cnt
= 16;
303 mp_msg(MSGT_TV
, MSGL_V
, "Audio capture - buffer %d blocks of %d bytes, skew average from %d meas.\n",
304 priv
->audio_buffer_size
, priv
->audio_in
.blocksize
, priv
->aud_skew_cnt
);
307 static tvi_handle_t
*tvi_init_v4l(tv_param_t
* tv_param
)
312 h
= tv_new_handle(sizeof(priv_t
), &functions
);
318 /* set video device name */
319 if (!tv_param
->device
)
320 priv
->video_device
= strdup("/dev/video0");
322 priv
->video_device
= strdup(tv_param
->device
);
324 /* set video device name */
325 if (!tv_param
->adevice
)
326 priv
->audio_device
= NULL
;
328 priv
->audio_device
= strdup(tv_param
->adevice
);
331 /* allocation failed */
332 if (!priv
->video_device
) {
337 priv
->tv_param
=tv_param
;
341 /* retrieves info about audio channels from the BTTV */
342 static void init_v4l_audio(priv_t
*priv
)
347 if (!priv
->capability
.audios
) return;
351 mp_msg(MSGT_TV
, MSGL_V
, " Audio devices: %d\n", priv
->capability
.audios
);
353 mp_msg(MSGT_TV
, MSGL_V
, "Video capture card reports the audio setup as follows:\n");
354 for (i
= 0; i
< priv
->capability
.audios
; i
++)
356 if (i
>= MAX_AUDIO_CHANNELS
)
358 mp_msg(MSGT_TV
, MSGL_ERR
, "no space for more audio channels (increase in source!) (%d > %d)\n",
359 i
, MAX_AUDIO_CHANNELS
);
360 i
= priv
->capability
.audios
;
364 priv
->audio
[i
].audio
= i
;
365 if (ioctl(priv
->video_fd
, VIDIOCGAUDIO
, &priv
->audio
[i
]) == -1)
367 mp_msg(MSGT_TV
, MSGL_ERR
, "ioctl get audio failed: %s\n", strerror(errno
));
371 /* mute all channels */
372 priv
->audio
[i
].flags
|= VIDEO_AUDIO_MUTE
;
374 if (priv
->tv_param
->amode
>= 0) {
375 switch (priv
->tv_param
->amode
) {
377 reqmode
= VIDEO_SOUND_MONO
;
380 reqmode
= VIDEO_SOUND_STEREO
;
383 reqmode
= VIDEO_SOUND_LANG1
;
386 reqmode
= VIDEO_SOUND_LANG2
;
389 mp_msg(MSGT_TV
, MSGL_ERR
, "Unknown audio mode requested.\n");
392 if (reqmode
>= 0) priv
->audio
[i
].mode
= reqmode
;
394 ioctl(priv
->video_fd
, VIDIOCSAUDIO
, &priv
->audio
[i
]);
396 // get the parameters back
397 if (ioctl(priv
->video_fd
, VIDIOCGAUDIO
, &priv
->audio
[i
]) == -1)
399 mp_msg(MSGT_TV
, MSGL_ERR
, "ioctl get audio failed: %s\n", strerror(errno
));
403 switch(priv
->audio
[i
].mode
)
405 case VIDEO_SOUND_MONO
:
406 case VIDEO_SOUND_LANG1
:
407 case VIDEO_SOUND_LANG2
:
408 priv
->audio_channels
[i
] = 1;
410 case VIDEO_SOUND_STEREO
:
411 priv
->audio_channels
[i
] = 2;
414 mp_msg(MSGT_TV
, MSGL_ERR
, "Card reports an unknown audio mode !\n");
415 mp_msg(MSGT_TV
, MSGL_ERR
, "Trying two channel audio. Use forcechan to override.\n");
416 priv
->audio_channels
[i
] = 2;
420 if (reqmode
>= 0 && priv
->audio
[i
].mode
!= reqmode
) {
421 mp_msg(MSGT_TV
, MSGL_ERR
, "Audio mode setup warning!\n");
422 mp_msg(MSGT_TV
, MSGL_ERR
, "Requested mode was %s, but v4l still reports %s.\n",
423 audio_mode2name(reqmode
), audio_mode2name(priv
->audio
[i
].mode
));
424 mp_msg(MSGT_TV
, MSGL_ERR
, "You may need \"forcechan\" option to force stereo/mono audio recording.\n");
428 mp_msg(MSGT_TV
, MSGL_V
, " %d: %s: ", priv
->audio
[i
].audio
,
429 priv
->audio
[i
].name
);
430 if (priv
->audio
[i
].flags
& VIDEO_AUDIO_MUTABLE
) {
431 mp_msg(MSGT_TV
, MSGL_V
, "muted=%s ",
432 (priv
->audio
[i
].flags
& VIDEO_AUDIO_MUTE
) ? "yes" : "no");
434 mp_msg(MSGT_TV
, MSGL_V
, "vol=%d bass=%d treble=%d balance=%d mode=%s",
435 priv
->audio
[i
].volume
, priv
->audio
[i
].bass
, priv
->audio
[i
].treble
,
436 priv
->audio
[i
].balance
, audio_mode2name(priv
->audio
[i
].mode
));
437 mp_msg(MSGT_TV
, MSGL_V
, " chan=%d\n", priv
->audio_channels
[i
]);
439 if (priv
->tv_param
->forcechan
>= 0)
440 priv
->audio_channels
[i
] = priv
->tv_param
->forcechan
;
442 // we'll call VIDIOCSAUDIO again when starting capture
443 // let's set audio mode to requested mode again for the case
444 // when VIDIOCGAUDIO just cannot report the mode correctly
445 if (reqmode
>= 0) priv
->audio
[i
].mode
= reqmode
;
449 #if !defined(__LINUX_VIDEODEV2_H) && !defined(VIDIOC_QUERYCAP)
450 struct v4l2_capability
452 __u8 driver
[16]; /* i.e. "bttv" */
453 __u8 card
[32]; /* i.e. "Hauppauge WinTV" */
454 __u8 bus_info
[32]; /* "PCI:" + pci_dev->slot_name */
455 __u32 version
; /* should use KERNEL_VERSION() */
456 __u32 capabilities
; /* Device capabilities */
460 #define VIDIOC_QUERYCAP _IOR ('V', 0, struct v4l2_capability)
463 static int init(priv_t
*priv
)
467 if (priv
->tv_param
->immediate
== 1)
468 priv
->tv_param
->noaudio
= 1;
470 priv
->video_ringbuffer
= NULL
;
471 priv
->video_timebuffer
= NULL
;
472 priv
->video_avg_buffer
= NULL
;
473 priv
->audio_ringbuffer
= NULL
;
474 priv
->audio_skew_buffer
= NULL
;
476 priv
->video_fd
= open(priv
->video_device
, O_RDWR
);
477 mp_msg(MSGT_TV
, MSGL_DBG2
, "Video fd: %d, %p\n", priv
->video_fd
,
479 if (priv
->video_fd
== -1)
481 mp_msg(MSGT_TV
, MSGL_ERR
, "unable to open '%s': %s\n",
482 priv
->video_device
, strerror(errno
));
487 if (ioctl(priv
->video_fd
, VIDIOC_QUERYCAP
, &priv
->capability
) == 0) {
488 mp_msg(MSGT_TV
, MSGL_ERR
, "=================================================================\n");
489 mp_msg(MSGT_TV
, MSGL_ERR
, " WARNING: YOU ARE USING V4L DEMUXER WITH V4L2 DRIVERS!!!\n");
490 mp_msg(MSGT_TV
, MSGL_ERR
, " As the V4L1 compatibility layer is broken, this may not work.\n");
491 mp_msg(MSGT_TV
, MSGL_ERR
, " If you encounter any problems, use driver=v4l2 instead.\n");
492 mp_msg(MSGT_TV
, MSGL_ERR
, " Bugreports on driver=v4l with v4l2 drivers will be ignored.\n");
493 mp_msg(MSGT_TV
, MSGL_ERR
, "=================================================================\n");
496 /* get capabilities (priv->capability is needed!) */
497 if (ioctl(priv
->video_fd
, VIDIOCGCAP
, &priv
->capability
) == -1)
499 mp_msg(MSGT_TV
, MSGL_ERR
, "ioctl get capabilities failed: %s\n", strerror(errno
));
503 fcntl(priv
->video_fd
, F_SETFD
, FD_CLOEXEC
);
505 mp_msg(MSGT_TV
, MSGL_INFO
, "Selected device: %s\n", priv
->capability
.name
);
506 mp_msg(MSGT_TV
, MSGL_INFO
, " Capabilities: ");
507 for (i
= 0; device_cap2name
[i
] != NULL
; i
++)
508 if (priv
->capability
.type
& (1 << i
))
509 mp_msg(MSGT_TV
, MSGL_INFO
, "%s ", device_cap2name
[i
]);
510 mp_msg(MSGT_TV
, MSGL_INFO
, "\n");
511 mp_msg(MSGT_TV
, MSGL_INFO
, " Device type: %d\n", priv
->capability
.type
);
512 mp_msg(MSGT_TV
, MSGL_INFO
, " Supported sizes: %dx%d => %dx%d\n",
513 priv
->capability
.minwidth
, priv
->capability
.minheight
,
514 priv
->capability
.maxwidth
, priv
->capability
.maxheight
);
515 priv
->width
= priv
->capability
.minwidth
;
516 priv
->height
= priv
->capability
.minheight
;
518 /* somewhere here could disable priv->tv_param->mjpeg, if it is not a capability */
520 /* initialize if necessary */
521 if ( priv
->tv_param
->mjpeg
)
523 struct mjpeg_params bparm
;
524 struct mjpeg_requestbuffers breq
; /* buffer requests */
526 if (ioctl(priv
->video_fd
, MJPIOC_G_PARAMS
, &bparm
) < 0)
528 mp_msg(MSGT_TV
, MSGL_ERR
,
529 " MJP: Error getting video parameters: %s\n", strerror(errno
));
533 mp_msg(MSGT_TV
, MSGL_INFO
,
534 " MJP: previous params: x: %d, y: %d, w: %d, h: %d, decim: %d, fields: %d,\n",
535 bparm
.img_x
, bparm
.img_y
, bparm
.img_width
, bparm
.img_height
,
536 bparm
.decimation
, bparm
.field_per_buff
);
538 mp_msg(MSGT_TV
, MSGL_INFO
,
539 " MJP: HorDcm: %d, VerDcm: %d, TmpDcm: %d\n",
540 bparm
.HorDcm
, bparm
.VerDcm
, bparm
.TmpDcm
);
542 bparm
.input
= priv
->tv_param
->input
; /* tv */
543 if (!strcasecmp(priv
->tv_param
->norm
, "pal"))
544 bparm
.norm
= 0; /* PAL */
545 else if (!strcasecmp(priv
->tv_param
->norm
, "ntsc"))
546 bparm
.norm
= 1; /* NTSC */
547 else if (!strcasecmp(priv
->tv_param
->norm
, "secam"))
548 bparm
.norm
= 2; /* SECAM */
549 bparm
.quality
= priv
->tv_param
->quality
;
550 bparm
.decimation
= priv
->tv_param
->decimation
;
552 mp_msg(MSGT_TV
, MSGL_INFO
, " MJP: setting params to decimation: %d, quality: %d\n",
553 bparm
.decimation
, bparm
.quality
);
555 if (ioctl(priv
->video_fd
, MJPIOC_S_PARAMS
, &bparm
) < 0)
557 mp_msg(MSGT_TV
, MSGL_ERR
,
558 " MJP: Error setting video parameters: %s\n", strerror(errno
));
562 if (ioctl(priv
->video_fd
, MJPIOC_G_PARAMS
, &bparm
) < 0)
564 mp_msg(MSGT_TV
, MSGL_ERR
,
565 " MJP: Error getting video parameters: %s\n", strerror(errno
));
569 mp_msg(MSGT_TV
, MSGL_INFO
,
570 " MJP: current params: x: %d, y: %d, w: %d, h: %d, decim: %d, fields: %d,\n",
571 bparm
.img_x
, bparm
.img_y
, bparm
.img_width
, bparm
.img_height
,
572 bparm
.decimation
, bparm
.field_per_buff
);
574 mp_msg(MSGT_TV
, MSGL_INFO
,
575 " MJP: HorDcm: %d, VerDcm: %d, TmpDcm: %d\n",
576 bparm
.HorDcm
, bparm
.VerDcm
, bparm
.TmpDcm
);
580 priv
-> nbuf
= breq
.count
;
581 priv
->mbuf
.frames
= priv
-> nbuf
;
582 priv
->mjpeg_bufsize
= 256*1024;
583 if (priv
->tv_param
->buffer_size
>= 0)
584 priv
->mjpeg_bufsize
= priv
->tv_param
->buffer_size
*1024;
585 breq
.size
= priv
-> mjpeg_bufsize
;
586 if (ioctl(priv
->video_fd
, MJPIOC_REQBUFS
,&(breq
)) < 0)
588 mp_msg (MSGT_TV
, MSGL_ERR
,
589 " MJP: Error requesting video buffers: %s\n", strerror(errno
));
592 mp_msg(MSGT_TV
, MSGL_INFO
,
593 " MJP: Got %ld buffers of size %ld KB\n",
594 breq
.count
, breq
.size
/1024);
596 priv
-> mmap
= mmap(0, breq
.count
* breq
.size
,
597 PROT_READ
|PROT_WRITE
, MAP_SHARED
, priv
->video_fd
, 0);
598 if (priv
-> mmap
== MAP_FAILED
)
600 mp_msg(MSGT_TV
, MSGL_INFO
,
601 " MJP: Error mapping video buffers: %s\n", strerror(errno
));
606 mp_msg(MSGT_TV
, MSGL_INFO
, " Inputs: %d\n", priv
->capability
.channels
);
607 priv
->channels
= calloc(priv
->capability
.channels
, sizeof(struct video_channel
));
610 memset(priv
->channels
, 0, sizeof(struct video_channel
)*priv
->capability
.channels
);
611 for (i
= 0; i
< priv
->capability
.channels
; i
++)
613 priv
->channels
[i
].channel
= i
;
614 if (ioctl(priv
->video_fd
, VIDIOCGCHAN
, &priv
->channels
[i
]) == -1)
616 mp_msg(MSGT_TV
, MSGL_ERR
, "ioctl get channel failed: %s\n", strerror(errno
));
619 mp_msg(MSGT_TV
, MSGL_INFO
, " %d: %s: %s%s%s%s (tuner:%d, norm:%s)\n", i
,
620 priv
->channels
[i
].name
,
621 (priv
->channels
[i
].flags
& VIDEO_VC_TUNER
) ? "tuner " : "",
622 (priv
->channels
[i
].flags
& VIDEO_VC_AUDIO
) ? "audio " : "",
623 (priv
->channels
[i
].flags
& VIDEO_TYPE_TV
) ? "tv " : "",
624 (priv
->channels
[i
].flags
& VIDEO_TYPE_CAMERA
) ? "camera " : "",
625 priv
->channels
[i
].tuners
,
626 norm2name(priv
->channels
[i
].norm
));
628 priv
->act_channel
= 0;
630 if (!(priv
->capability
.type
& VID_TYPE_CAPTURE
))
632 mp_msg(MSGT_TV
, MSGL_ERR
, "Only grabbing supported (for overlay use another program)\n");
637 /* init v4l audio even when we don't capture */
638 init_v4l_audio(priv
);
640 if (!priv
->capability
.audios
&& !priv
->tv_param
->force_audio
) priv
->tv_param
->noaudio
= 1;
643 if (!priv
->tv_param
->noaudio
) {
646 if (priv
->tv_param
->alsa
)
647 audio_in_init(&priv
->audio_in
, AUDIO_IN_ALSA
);
649 audio_in_init(&priv
->audio_in
, AUDIO_IN_OSS
);
651 audio_in_init(&priv
->audio_in
, AUDIO_IN_OSS
);
654 if (priv
->audio_device
) {
655 audio_in_set_device(&priv
->audio_in
, priv
->audio_device
);
658 if (priv
->tv_param
->audio_id
< priv
->capability
.audios
)
659 priv
->audio_id
= priv
->tv_param
->audio_id
;
662 audio_in_set_samplerate(&priv
->audio_in
, 44100);
663 if (priv
->capability
.audios
) {
664 audio_in_set_channels(&priv
->audio_in
, priv
->audio_channels
[priv
->audio_id
]);
666 if (priv
->tv_param
->forcechan
>= 0) {
667 audio_in_set_channels(&priv
->audio_in
, priv
->tv_param
->forcechan
);
669 audio_in_set_channels(&priv
->audio_in
, 2);
672 if (audio_in_setup(&priv
->audio_in
) < 0) return 0;
673 setup_audio_buffer_sizes(priv
);
679 free(priv
->channels
);
682 if (priv
->video_fd
!= -1)
683 close(priv
->video_fd
);
687 static int uninit(priv_t
*priv
)
691 priv
->vbi_shutdown
=1;
692 if(priv
->vbi_grabber_thread
)
693 pthread_join(priv
->vbi_grabber_thread
, NULL
);
695 teletext_control(priv
->priv_vbi
,TV_VBI_CONTROL_STOP
,(void*)1);
704 priv
->vbi_dev
= NULL
;
708 mp_msg(MSGT_TV
, MSGL_V
, "Waiting for threads to finish... ");
709 if (!priv
->tv_param
->noaudio
) {
710 pthread_join(priv
->audio_grabber_thread
, NULL
);
711 pthread_mutex_destroy(&priv
->audio_starter
);
712 pthread_mutex_destroy(&priv
->skew_mutex
);
714 pthread_mutex_destroy(&priv
->video_buffer_mutex
);
715 if(priv
->video_grabber_thread
)
716 pthread_join(priv
->video_grabber_thread
, NULL
);
718 mp_msg(MSGT_TV
, MSGL_V
, "done\n");
720 if (priv
->capability
.audios
) {
721 priv
->audio
[priv
->audio_id
].flags
|= VIDEO_AUDIO_MUTE
;
722 ioctl(priv
->video_fd
, VIDIOCSAUDIO
, &priv
->audio
[priv
->audio_id
]);
725 if ( priv
->tv_param
->mjpeg
)
728 if (ioctl(priv
->video_fd
, MJPIOC_QBUF_CAPT
, &num
) < 0)
729 mp_msg(MSGT_TV
, MSGL_ERR
, "\n MJP: ioctl MJPIOC_QBUF_CAPT failed: %s\n", strerror(errno
));
733 // We need to munmap as close don't close mem mappings
734 if(munmap(priv
->mmap
,priv
->mbuf
.size
))
735 mp_msg(MSGT_TV
, MSGL_ERR
, "Munmap failed: %s\n",strerror(errno
));
738 if(close(priv
->video_fd
))
739 mp_msg(MSGT_TV
, MSGL_ERR
, "Close tv failed: %s\n",strerror(errno
));
741 audio_in_uninit(&priv
->audio_in
);
743 if (priv
->video_ringbuffer
) {
745 for (i
= 0; i
< priv
->video_buffer_size_current
; i
++) {
746 free(priv
->video_ringbuffer
[i
]);
748 free(priv
->video_ringbuffer
);
751 free(priv
->video_timebuffer
);
752 free(priv
->video_avg_buffer
);
753 if (!priv
->tv_param
->noaudio
) {
754 free(priv
->audio_ringbuffer
);
755 free(priv
->audio_skew_buffer
);
761 static int get_capture_buffer_size(priv_t
*priv
)
765 if (priv
->tv_param
->buffer_size
>= 0) {
766 bufsize
= priv
->tv_param
->buffer_size
*1024*1024;
768 #ifdef HAVE_SYS_SYSINFO_H
772 if (si
.totalram
<2*1024*1024) {
775 bufsize
= si
.totalram
/2;
778 bufsize
= 16*1024*1024;
782 cnt
= bufsize
/(priv
->height
*priv
->bytesperline
);
783 if (cnt
< 2) cnt
= 2;
788 static int vbi_init(priv_t
* priv
,char* device
)
791 struct video_capability cap
;
794 return TVI_CONTROL_FALSE
;
796 priv
->vbi_dev
=strdup(device
);
798 vbi_fd
=open(priv
->vbi_dev
,O_RDWR
);
800 mp_msg(MSGT_TV
,MSGL_ERR
,"vbi: could not open device %s\n",priv
->vbi_dev
);
801 return TVI_CONTROL_FALSE
;
804 if(ioctl(vbi_fd
,VIDIOCGCAP
,&cap
)<0){
805 mp_msg(MSGT_TV
,MSGL_ERR
,"vbi: Query capabilities failed for %s\n",priv
->vbi_dev
);
807 return TVI_CONTROL_FALSE
;
809 if(!cap
.type
& VID_TYPE_CAPTURE
){
810 mp_msg(MSGT_TV
,MSGL_ERR
,"vbi: %s is not capture device\n",priv
->vbi_dev
);
812 return TVI_CONTROL_FALSE
;
816 mp_msg(MSGT_TV
,MSGL_DBG3
,"vbi: init ok\n");
817 return TVI_CONTROL_TRUE
;
820 static int vbi_get_props(priv_t
* priv
,tt_stream_props
* ptsp
)
822 struct vbi_format fmt
;
825 return TVI_CONTROL_FALSE
;
827 memset(&fmt
,0,sizeof(struct vbi_format
));
828 if((res
=ioctl(priv
->vbi_fd
,VIDIOCGVBIFMT
,&fmt
))<0){
829 mp_msg(MSGT_TV
,MSGL_ERR
,"vbi_get_props: Query format failed: %x\n",res
);
830 return TVI_CONTROL_FALSE
;
833 ptsp
->interlaced
=(fmt
.flags
& VBI_INTERLACED
?1:0);
834 if(fmt
.start
[1]>0 && fmt
.count
[1]){
835 if(fmt
.start
[1]>=286)
837 ptsp
->offset
=10.2e-6*fmt
.sampling_rate
;
840 ptsp
->offset
=9.2e-6*fmt
.sampling_rate
;
842 ptsp
->offset
=9.7e-6*fmt
.sampling_rate
;
844 ptsp
->sampling_rate
=fmt
.sampling_rate
;
845 ptsp
->samples_per_line
=fmt
.samples_per_line
,
847 ptsp
->count
[0]=fmt
.count
[0];
848 ptsp
->count
[1]=fmt
.count
[1];
849 ptsp
->bufsize
= ptsp
->samples_per_line
* (ptsp
->count
[0] + ptsp
->count
[1]);
851 mp_msg(MSGT_TV
,MSGL_V
,"vbi_get_props: sampling_rate=%d,offset:%d,samples_per_line: %d\n interlaced:%s, count=[%d,%d]\n",
854 ptsp
->samples_per_line
,
855 ptsp
->interlaced
?"Yes":"No",
859 return TVI_CONTROL_TRUE
;
862 static void *vbi_grabber(void *data
)
864 priv_t
*priv
= (priv_t
*) data
;
865 int bytes
,seq
,prev_seq
;
870 mp_msg(MSGT_TV
,MSGL_WARN
,"vbi: vbi not initialized. stopping thread.\n");
874 if(vbi_get_props(priv
,&tsp
)!=TVI_CONTROL_TRUE
)
877 buf
=malloc(tsp
.bufsize
);
880 mp_msg(MSGT_TV
,MSGL_V
,"vbi: vbi capture thread started.\n");
882 while (!priv
->vbi_shutdown
){
883 bytes
=read(priv
->vbi_fd
,buf
,tsp
.bufsize
);
884 if(bytes
<0 && errno
==EINTR
)
886 if (bytes
!=tsp
.bufsize
){
887 mp_msg(MSGT_TV
,MSGL_WARN
,"vbi: expecting bytes: %d, got: %d",tsp
.bufsize
,bytes
);
890 seq
=*(int*)(buf
+bytes
-4);
892 if (prev_seq
&& seq
!=prev_seq
+1){
897 teletext_control(priv
->priv_vbi
,TV_VBI_CONTROL_DECODE_PAGE
,&buf
);
898 mp_msg(MSGT_TV
,MSGL_DBG3
,"grabber: seq:%d\n",seq
);
904 static int start(priv_t
*priv
)
907 int bytes_per_sample
;
908 struct video_window win
;
910 if (ioctl(priv
->video_fd
, VIDIOCGPICT
, &priv
->picture
) == -1)
912 mp_msg(MSGT_TV
, MSGL_ERR
, "ioctl get picture failed: %s\n", strerror(errno
));
916 priv
->picture
.palette
= format2palette(priv
->format
);
917 priv
->picture
.depth
= palette2depth(priv
->picture
.palette
);
919 if (priv
->format
!= IMGFMT_BGR15
) {
920 priv
->bytesperline
= priv
->width
* priv
->picture
.depth
/ 8;
922 priv
->bytesperline
= priv
->width
* 2;
925 mp_msg(MSGT_TV
, MSGL_V
, "Picture values:\n");
926 mp_msg(MSGT_TV
, MSGL_V
, " Depth: %d, Palette: %s (Format: %s)\n", priv
->picture
.depth
,
927 PALETTE(priv
->picture
.palette
), vo_format_name(priv
->format
));
928 mp_msg(MSGT_TV
, MSGL_V
, " Brightness: %d, Hue: %d, Colour: %d, Contrast: %d\n",
929 priv
->picture
.brightness
, priv
->picture
.hue
,
930 priv
->picture
.colour
, priv
->picture
.contrast
);
932 if (ioctl(priv
->video_fd
, VIDIOCSPICT
, &priv
->picture
) == -1)
934 mp_msg(MSGT_TV
, MSGL_ERR
, "ioctl set picture failed: %s\n", strerror(errno
));
935 mp_msg(MSGT_TV
, MSGL_ERR
, "The 'outfmt' of '%s' is likely not supported by your card\n",
936 vo_format_name(priv
->format
));
940 /* Set capture size */
943 win
.width
= priv
->width
;
944 win
.height
= priv
->height
;
948 if (ioctl(priv
->video_fd
, VIDIOCSWIN
, &win
) == -1)
949 mp_msg(MSGT_TV
, MSGL_ERR
, "ioctl set window failed: %s\n", strerror(errno
));
951 if ( !priv
->tv_param
->mjpeg
)
953 /* map grab buffer */
954 if (ioctl(priv
->video_fd
, VIDIOCGMBUF
, &priv
->mbuf
) == -1)
956 mp_msg(MSGT_TV
, MSGL_ERR
, "ioctl get mbuf failed: %s\n", strerror(errno
));
960 mp_msg(MSGT_TV
, MSGL_V
, "mbuf: size=%d, frames=%d\n",
961 priv
->mbuf
.size
, priv
->mbuf
.frames
);
962 priv
->mmap
= mmap(0, priv
->mbuf
.size
, PROT_READ
|PROT_WRITE
,
963 MAP_SHARED
, priv
->video_fd
, 0);
964 if (priv
->mmap
== (unsigned char *)-1)
966 mp_msg(MSGT_TV
, MSGL_ERR
, "Unable to map memory for buffers: %s\n", strerror(errno
));
969 mp_msg(MSGT_TV
, MSGL_DBG2
, "our buffer: %p\n", priv
->mmap
);
972 priv
->nbuf
= priv
->mbuf
.frames
;
975 priv
->buf
= calloc(priv
->nbuf
, sizeof(struct video_mmap
));
978 memset(priv
->buf
, 0, priv
->nbuf
* sizeof(struct video_mmap
));
981 if ( !priv
->tv_param
->mjpeg
)
983 priv
->nbuf
= priv
->mbuf
.frames
;
984 for (i
=0; i
< priv
->nbuf
; i
++)
986 priv
->buf
[i
].format
= priv
->picture
.palette
;
987 priv
->buf
[i
].frame
= i
;
988 priv
->buf
[i
].width
= priv
->width
;
989 priv
->buf
[i
].height
= priv
->height
;
990 mp_msg(MSGT_TV
, MSGL_DBG2
, "buffer: %d => %p\n", i
, &priv
->buf
[i
]);
996 struct video_play_mode pmode
;
998 pmode
.mode
= VID_PLAY_NORMAL
;
1001 if (ioctl(priv
->video_fd
, VIDIOCSPLAYMODE
, &pmode
) == -1)
1003 mp_msg(MSGT_TV
, MSGL_ERR
, "ioctl set play mode failed: %s\n", strerror(errno
));
1010 // initialize video capture
1011 if (ioctl(priv
->video_fd
, VIDIOCCAPTURE
, &one
) == -1)
1013 mp_msg(MSGT_TV
, MSGL_ERR
, "FATAL: ioctl ccapture failed: %s\n", strerror(errno
));
1018 /* setup audio parameters */
1019 if (!priv
->tv_param
->noaudio
) {
1020 setup_audio_buffer_sizes(priv
);
1021 bytes_per_sample
= priv
->audio_in
.bytes_per_sample
;
1022 priv
->audio_skew_buffer
= calloc(priv
->aud_skew_cnt
, sizeof(long long));
1023 if (!priv
->audio_skew_buffer
) {
1024 mp_msg(MSGT_TV
, MSGL_ERR
, "cannot allocate skew buffer: %s\n", strerror(errno
));
1028 priv
->audio_ringbuffer
= calloc(priv
->audio_in
.blocksize
, priv
->audio_buffer_size
);
1029 if (!priv
->audio_ringbuffer
) {
1030 mp_msg(MSGT_TV
, MSGL_ERR
, "cannot allocate audio buffer: %s\n", strerror(errno
));
1034 priv
->audio_secs_per_block
= (double)priv
->audio_in
.blocksize
/(priv
->audio_in
.samplerate
1035 *priv
->audio_in
.channels
1037 priv
->audio_head
= 0;
1038 priv
->audio_tail
= 0;
1039 priv
->audio_cnt
= 0;
1040 priv
->audio_drop
= 0;
1041 priv
->audio_skew
= 0;
1042 priv
->audio_skew_total
= 0;
1043 priv
->audio_recv_blocks_total
= 0;
1044 priv
->audio_sent_blocks_total
= 0;
1047 /* setup video parameters */
1048 if (priv
->immediate_mode
) {
1049 priv
->video_buffer_size_max
= VID_BUF_SIZE_IMMEDIATE
;
1051 priv
->video_buffer_size_max
= get_capture_buffer_size(priv
);
1053 priv
->video_buffer_size_current
= 0;
1055 if (!priv
->tv_param
->noaudio
) {
1056 if (priv
->video_buffer_size_max
< 3.0*priv
->fps
*priv
->audio_secs_per_block
) {
1057 mp_msg(MSGT_TV
, MSGL_ERR
, "Video buffer shorter than 3 times audio frame duration.\n"
1058 "You will probably experience heavy framedrops.\n");
1062 mp_msg(MSGT_TV
, MSGL_V
, "Using a ring buffer for maximum %d frames, %d MB total size.\n",
1063 priv
->video_buffer_size_max
,
1064 priv
->video_buffer_size_max
*priv
->height
*priv
->bytesperline
/(1024*1024));
1066 priv
->video_ringbuffer
= calloc(priv
->video_buffer_size_max
, sizeof(unsigned char*));
1067 if (!priv
->video_ringbuffer
) {
1068 mp_msg(MSGT_TV
, MSGL_ERR
, "cannot allocate video buffer: %s\n", strerror(errno
));
1071 for (i
= 0; i
< priv
->video_buffer_size_max
; i
++)
1072 priv
->video_ringbuffer
[i
] = NULL
;
1074 priv
->video_timebuffer
= calloc(priv
->video_buffer_size_max
, sizeof(long long));
1075 if (!priv
->video_timebuffer
) {
1076 mp_msg(MSGT_TV
, MSGL_ERR
, "cannot allocate time buffer: %s\n", strerror(errno
));
1079 priv
->video_avg_buffer
= malloc(sizeof(long long) * VIDEO_AVG_BUFFER_SIZE
);
1080 if (!priv
->video_avg_buffer
) {
1081 mp_msg(MSGT_TV
, MSGL_ERR
, "cannot allocate period buffer: %s\n", strerror(errno
));
1084 priv
->video_interval_sum
= (1e6
/priv
->fps
)*VIDEO_AVG_BUFFER_SIZE
;
1085 for (i
= 0; i
< VIDEO_AVG_BUFFER_SIZE
; i
++) {
1086 priv
->video_avg_buffer
[i
] = 1e6
/priv
->fps
;
1089 priv
->video_avg_ptr
= 0;
1091 priv
->video_head
= 0;
1092 priv
->video_tail
= 0;
1093 priv
->video_cnt
= 0;
1096 if (priv
->capability
.audios
) {
1098 if (priv
->tv_param
->volume
>= 0)
1099 priv
->audio
[priv
->audio_id
].volume
= priv
->tv_param
->volume
;
1100 if (priv
->tv_param
->bass
>= 0)
1101 priv
->audio
[priv
->audio_id
].bass
= priv
->tv_param
->bass
;
1102 if (priv
->tv_param
->treble
>= 0)
1103 priv
->audio
[priv
->audio_id
].treble
= priv
->tv_param
->treble
;
1104 if (priv
->tv_param
->balance
>= 0)
1105 priv
->audio
[priv
->audio_id
].balance
= priv
->tv_param
->balance
;
1106 priv
->audio
[priv
->audio_id
].flags
&= ~VIDEO_AUDIO_MUTE
;
1107 mp_msg(MSGT_TV
, MSGL_V
, "Enabling tv audio. Requested setup is:\n");
1108 mp_msg(MSGT_TV
, MSGL_V
, "id=%d vol=%d bass=%d treble=%d balance=%d mode=%s",
1110 priv
->audio
[priv
->audio_id
].volume
, priv
->audio
[priv
->audio_id
].bass
, priv
->audio
[priv
->audio_id
].treble
,
1111 priv
->audio
[priv
->audio_id
].balance
, audio_mode2name(priv
->audio
[priv
->audio_id
].mode
));
1112 mp_msg(MSGT_TV
, MSGL_V
, " chan=%d\n", priv
->audio_channels
[priv
->audio_id
]);
1113 ioctl(priv
->video_fd
, VIDIOCSAUDIO
, &priv
->audio
[priv
->audio_id
]);
1116 /* start vbi thread */
1118 priv
->vbi_shutdown
= 0;
1119 pthread_create(&priv
->vbi_grabber_thread
, NULL
, vbi_grabber
, priv
);
1122 /* launch capture threads */
1124 if (!priv
->tv_param
->noaudio
) {
1125 pthread_mutex_init(&priv
->audio_starter
, NULL
);
1126 pthread_mutex_init(&priv
->skew_mutex
, NULL
);
1127 pthread_mutex_lock(&priv
->audio_starter
);
1128 pthread_create(&priv
->audio_grabber_thread
, NULL
, audio_grabber
, priv
);
1130 pthread_mutex_init(&priv
->video_buffer_mutex
, NULL
);
1131 /* we'll launch the video capture later, when a first request for a frame arrives */
1137 static int control(priv_t
*priv
, int cmd
, void *arg
)
1139 mp_msg(MSGT_TV
, MSGL_DBG2
, "\ndebug: control(priv=%p, cmd=%d, arg=%p)\n",
1143 /* ========== GENERIC controls =========== */
1144 case TVI_CONTROL_IS_VIDEO
:
1146 if (priv
->capability
.type
& VID_TYPE_CAPTURE
)
1147 return TVI_CONTROL_TRUE
;
1148 return TVI_CONTROL_FALSE
;
1150 case TVI_CONTROL_IS_AUDIO
:
1151 if (priv
->tv_param
->force_audio
) return TVI_CONTROL_TRUE
;
1152 if (priv
->channels
[priv
->act_channel
].flags
& VIDEO_VC_AUDIO
)
1154 return TVI_CONTROL_TRUE
;
1156 return TVI_CONTROL_FALSE
;
1157 case TVI_CONTROL_IS_TUNER
:
1159 // if (priv->capability.type & VID_TYPE_TUNER)
1160 if (priv
->channels
[priv
->act_channel
].flags
& VIDEO_VC_TUNER
)
1161 return TVI_CONTROL_TRUE
;
1162 return TVI_CONTROL_FALSE
;
1165 /* ========== VIDEO controls =========== */
1166 case TVI_CONTROL_VID_GET_FORMAT
:
1168 int output_fmt
= -1;
1170 output_fmt
= priv
->format
;
1171 if ( priv
->tv_param
->mjpeg
)
1173 mp_msg(MSGT_TV
, MSGL_INFO
, " MJP: setting sh_video->format to mjpg\n");
1174 output_fmt
= 0x47504a4d;
1175 output_fmt
= 0x67706a6d;
1176 *(int *)arg
= output_fmt
;
1177 mp_msg(MSGT_TV
, MSGL_V
, "Output format: %s\n", "mjpg");
1181 *(int *)arg
= output_fmt
;
1182 mp_msg(MSGT_TV
, MSGL_V
, "Output format: %s\n", vo_format_name(output_fmt
));
1184 return TVI_CONTROL_TRUE
;
1186 case TVI_CONTROL_VID_SET_FORMAT
:
1187 priv
->format
= *(int *)arg
;
1188 // !HACK! v4l uses BGR format instead of RGB
1189 // and we have to correct this. Fortunately,
1190 // tv.c reads later the format back so we
1191 // can persuade it to use what we want.
1192 if (IMGFMT_IS_RGB(priv
->format
)) {
1193 priv
->format
&= ~IMGFMT_RGB_MASK
;
1194 priv
->format
|= IMGFMT_BGR
;
1196 return TVI_CONTROL_TRUE
;
1197 case TVI_CONTROL_VID_GET_PLANES
:
1198 *(int *)arg
= 1; /* FIXME, also not needed at this time */
1199 return TVI_CONTROL_TRUE
;
1200 case TVI_CONTROL_VID_GET_BITS
:
1201 *(int *)arg
= palette2depth(format2palette(priv
->format
));
1202 return TVI_CONTROL_TRUE
;
1203 case TVI_CONTROL_VID_GET_WIDTH
:
1204 *(int *)arg
= priv
->width
;
1205 return TVI_CONTROL_TRUE
;
1206 case TVI_CONTROL_VID_CHK_WIDTH
:
1208 int req_width
= *(int *)arg
;
1210 mp_msg(MSGT_TV
, MSGL_V
, "Requested width: %d\n", req_width
);
1211 if ((req_width
>= priv
->capability
.minwidth
) &&
1212 (req_width
<= priv
->capability
.maxwidth
))
1213 return TVI_CONTROL_TRUE
;
1214 return TVI_CONTROL_FALSE
;
1216 case TVI_CONTROL_VID_SET_WIDTH
:
1217 priv
->width
= *(int *)arg
;
1218 return TVI_CONTROL_TRUE
;
1219 case TVI_CONTROL_VID_GET_HEIGHT
:
1220 *(int *)arg
= priv
->height
;
1221 return TVI_CONTROL_TRUE
;
1222 case TVI_CONTROL_VID_CHK_HEIGHT
:
1224 int req_height
= *(int *)arg
;
1226 mp_msg(MSGT_TV
, MSGL_V
, "Requested height: %d\n", req_height
);
1227 if ((req_height
>= priv
->capability
.minheight
) &&
1228 (req_height
<= priv
->capability
.maxheight
))
1229 return TVI_CONTROL_TRUE
;
1230 return TVI_CONTROL_FALSE
;
1232 case TVI_CONTROL_VID_SET_HEIGHT
:
1233 priv
->height
= *(int *)arg
;
1234 return TVI_CONTROL_TRUE
;
1235 case TVI_CONTROL_VID_GET_PICTURE
:
1236 if (ioctl(priv
->video_fd
, VIDIOCGPICT
, &priv
->picture
) == -1)
1238 mp_msg(MSGT_TV
, MSGL_ERR
, "ioctl get picture failed: %s\n", strerror(errno
));
1239 return TVI_CONTROL_FALSE
;
1241 return TVI_CONTROL_TRUE
;
1242 case TVI_CONTROL_VID_SET_PICTURE
:
1243 if (ioctl(priv
->video_fd
, VIDIOCSPICT
, &priv
->picture
) == -1)
1245 mp_msg(MSGT_TV
, MSGL_ERR
, "ioctl set picture failed: %s\n", strerror(errno
));
1246 return TVI_CONTROL_FALSE
;
1248 return TVI_CONTROL_TRUE
;
1249 case TVI_CONTROL_VID_SET_BRIGHTNESS
:
1250 priv
->picture
.brightness
= (327*(*(int *)arg
+100)) + 68;
1251 return control(priv
, TVI_CONTROL_VID_SET_PICTURE
, 0);
1252 case TVI_CONTROL_VID_SET_HUE
:
1253 priv
->picture
.hue
= (327*(*(int *)arg
+100)) + 68;
1254 return control(priv
, TVI_CONTROL_VID_SET_PICTURE
, 0);
1255 case TVI_CONTROL_VID_SET_SATURATION
:
1256 priv
->picture
.colour
= (327*(*(int *)arg
+100)) + 68;
1257 return control(priv
, TVI_CONTROL_VID_SET_PICTURE
, 0);
1258 case TVI_CONTROL_VID_SET_CONTRAST
:
1259 priv
->picture
.contrast
= (327*(*(int *)arg
+100)) + 68;
1260 return control(priv
, TVI_CONTROL_VID_SET_PICTURE
, 0);
1261 case TVI_CONTROL_VID_GET_BRIGHTNESS
:
1262 if(!control(priv
, TVI_CONTROL_VID_GET_PICTURE
, 0)) return 0;
1263 *(int*)arg
= ((int)priv
->picture
.brightness
-68)/327-100;
1265 case TVI_CONTROL_VID_GET_HUE
:
1266 if(!control(priv
, TVI_CONTROL_VID_GET_PICTURE
, 0)) return 0;
1267 *(int*)arg
= ((int)priv
->picture
.hue
-68)/327-100;
1269 case TVI_CONTROL_VID_GET_SATURATION
:
1270 if(!control(priv
, TVI_CONTROL_VID_GET_PICTURE
, 0)) return 0;
1271 *(int*)arg
= ((int)priv
->picture
.colour
-68)/327-100;
1273 case TVI_CONTROL_VID_GET_CONTRAST
:
1274 if(!control(priv
, TVI_CONTROL_VID_GET_PICTURE
, 0)) return 0;
1275 *(int*)arg
= ((int)priv
->picture
.contrast
-68)/327-100;
1277 case TVI_CONTROL_VID_GET_FPS
:
1278 *(float *)arg
=priv
->fps
;
1279 return TVI_CONTROL_TRUE
;
1281 /* ========== TUNER controls =========== */
1282 case TVI_CONTROL_TUN_GET_FREQ
:
1286 if (ioctl(priv
->video_fd
, VIDIOCGFREQ
, &freq
) == -1)
1288 mp_msg(MSGT_TV
, MSGL_ERR
, "ioctl get freq failed: %s\n", strerror(errno
));
1289 return TVI_CONTROL_FALSE
;
1292 /* tuner uses khz not mhz ! */
1293 // if (priv->tuner.flags & VIDEO_TUNER_LOW)
1295 *(unsigned long *)arg
= freq
;
1296 return TVI_CONTROL_TRUE
;
1298 case TVI_CONTROL_TUN_SET_FREQ
:
1300 /* argument is in MHz ! */
1301 unsigned long freq
= *(unsigned long *)arg
;
1303 if (priv
->capability
.audios
) {
1304 priv
->audio
[priv
->audio_id
].flags
|= VIDEO_AUDIO_MUTE
;
1305 ioctl(priv
->video_fd
, VIDIOCSAUDIO
, &priv
->audio
[priv
->audio_id
]);
1308 mp_msg(MSGT_TV
, MSGL_V
, "requested frequency: %.3f\n", (float)freq
/16);
1310 /* tuner uses khz not mhz ! */
1311 // if (priv->tuner.flags & VIDEO_TUNER_LOW)
1313 // mp_msg(MSGT_TV, MSGL_V, " requesting from driver: freq=%.3f\n", (float)freq/16);
1314 if (ioctl(priv
->video_fd
, VIDIOCSFREQ
, &freq
) == -1)
1316 mp_msg(MSGT_TV
, MSGL_ERR
, "ioctl set freq failed: %s\n", strerror(errno
));
1317 return TVI_CONTROL_FALSE
;
1319 usleep(100000); // wait to suppress noise during switching
1321 if (priv
->capability
.audios
) {
1322 priv
->audio
[priv
->audio_id
].flags
&= ~VIDEO_AUDIO_MUTE
;
1323 ioctl(priv
->video_fd
, VIDIOCSAUDIO
, &priv
->audio
[priv
->audio_id
]);
1326 return TVI_CONTROL_TRUE
;
1328 case TVI_CONTROL_TUN_GET_TUNER
:
1330 if (ioctl(priv
->video_fd
, VIDIOCGTUNER
, &priv
->tuner
) == -1)
1332 mp_msg(MSGT_TV
, MSGL_ERR
, "ioctl get tuner failed: %s\n", strerror(errno
));
1333 return TVI_CONTROL_FALSE
;
1336 mp_msg(MSGT_TV
, MSGL_V
, "Tuner (%s) range: %lu -> %lu\n", priv
->tuner
.name
,
1337 priv
->tuner
.rangelow
, priv
->tuner
.rangehigh
);
1338 return TVI_CONTROL_TRUE
;
1340 case TVI_CONTROL_TUN_SET_TUNER
:
1342 if (ioctl(priv
->video_fd
, VIDIOCSTUNER
, &priv
->tuner
) == -1)
1344 mp_msg(MSGT_TV
, MSGL_ERR
, "ioctl set tuner failed: %s\n", strerror(errno
));
1345 return TVI_CONTROL_FALSE
;
1347 return TVI_CONTROL_TRUE
;
1349 case TVI_CONTROL_TUN_SET_NORM
:
1351 int req_mode
= *(int *)arg
;
1353 for(norm_index
=0;supported_norms
[norm_index
].name
; norm_index
++)
1354 if(req_mode
==supported_norms
[norm_index
].normid
)
1357 if(!supported_norms
[norm_index
].name
) {
1358 mp_msg(MSGT_TV
, MSGL_ERR
, "Unknown norm!\n");
1359 return TVI_CONTROL_FALSE
;
1362 if (priv
->channels
[priv
->act_channel
].flags
& VIDEO_VC_TUNER
) {
1365 control(priv
, TVI_CONTROL_TUN_GET_TUNER
, 0);
1366 if(!(priv
->tuner
.flags
& supported_norms
[norm_index
].tuner_flags
))
1368 mp_msg(MSGT_TV
, MSGL_ERR
, "Tuner isn't capable to set norm!\n");
1369 return TVI_CONTROL_FALSE
;
1372 prev_mode
= priv
->tuner
.mode
;
1374 priv
->tuner
.mode
= supported_norms
[norm_index
].tuner_mode
;
1376 if (control(priv
, TVI_CONTROL_TUN_SET_TUNER
, &priv
->tuner
) != TVI_CONTROL_TRUE
) {
1377 // norm setting failed, but maybe it's only because it's fixed
1378 if (priv
->tuner
.mode
!= prev_mode
) return TVI_CONTROL_FALSE
; // no it really failed
1383 priv
->channels
[priv
->act_channel
].norm
= supported_norms
[norm_index
].input_norm
;
1385 if (ioctl(priv
->video_fd
, VIDIOCSCHAN
, &priv
->channels
[priv
->act_channel
]) == -1)
1387 mp_msg(MSGT_TV
, MSGL_ERR
, "ioctl set chan failed: %s\n", strerror(errno
));
1388 return TVI_CONTROL_FALSE
;
1391 if (ioctl(priv
->video_fd
, VIDIOCGCAP
, &priv
->capability
) == -1) {
1392 mp_msg(MSGT_TV
, MSGL_ERR
, "ioctl get capabilities failed: %s\n", strerror(errno
));
1393 return TVI_CONTROL_FALSE
;
1396 priv
->fps
= supported_norms
[norm_index
].fps
;
1398 if(priv
->height
> priv
->capability
.maxheight
) {
1399 priv
->height
= priv
->capability
.maxheight
;
1402 if(priv
->width
> priv
->capability
.maxwidth
) {
1403 priv
->width
= priv
->capability
.maxwidth
;
1406 return TVI_CONTROL_TRUE
;
1408 case TVI_CONTROL_TUN_GET_NORM
:
1410 *(int *)arg
= priv
->tuner
.mode
;
1412 return TVI_CONTROL_TRUE
;
1414 case TVI_CONTROL_TUN_GET_SIGNAL
:
1416 if (ioctl(priv
->video_fd
, VIDIOCGTUNER
, &priv
->tuner
) == -1)
1418 mp_msg(MSGT_TV
, MSGL_ERR
, "ioctl get tuner failed: %s\n", strerror(errno
));
1419 return TVI_CONTROL_FALSE
;
1421 *(int*)arg
=100*(priv
->tuner
.signal
>>8)/255;
1422 return TVI_CONTROL_TRUE
;
1425 /* ========== AUDIO controls =========== */
1426 case TVI_CONTROL_AUD_GET_FORMAT
:
1428 *(int *)arg
= AF_FORMAT_S16_LE
;
1429 return TVI_CONTROL_TRUE
;
1431 case TVI_CONTROL_AUD_GET_CHANNELS
:
1433 *(int *)arg
= priv
->audio_in
.channels
;
1434 return TVI_CONTROL_TRUE
;
1436 case TVI_CONTROL_AUD_GET_SAMPLERATE
:
1438 *(int *)arg
= priv
->audio_in
.samplerate
;
1439 return TVI_CONTROL_TRUE
;
1441 case TVI_CONTROL_AUD_GET_SAMPLESIZE
:
1443 *(int *)arg
= priv
->audio_in
.bytes_per_sample
;
1444 return TVI_CONTROL_TRUE
;
1446 case TVI_CONTROL_AUD_SET_SAMPLERATE
:
1448 if (audio_in_set_samplerate(&priv
->audio_in
, *(int *)arg
) < 0) return TVI_CONTROL_FALSE
;
1449 setup_audio_buffer_sizes(priv
);
1450 return TVI_CONTROL_TRUE
;
1452 /* ========== SPECIFIC controls =========== */
1453 case TVI_CONTROL_SPC_GET_INPUT
:
1455 int req_chan
= *(int *)arg
;
1458 for (i
= 0; i
< priv
->capability
.channels
; i
++)
1460 if (priv
->channels
[i
].channel
== req_chan
)
1464 priv
->act_channel
= i
;
1466 if (ioctl(priv
->video_fd
, VIDIOCGCHAN
, &priv
->channels
[i
]) == -1)
1468 mp_msg(MSGT_TV
, MSGL_ERR
, "ioctl get channel failed: %s\n", strerror(errno
));
1469 return TVI_CONTROL_FALSE
;
1471 return TVI_CONTROL_TRUE
;
1474 case TVI_CONTROL_SPC_SET_INPUT
:
1476 struct video_channel chan
;
1477 int req_chan
= *(int *)arg
;
1480 if (req_chan
>= priv
->capability
.channels
)
1482 mp_msg(MSGT_TV
, MSGL_ERR
, "Invalid input requested: %d, valid: 0-%d\n",
1483 req_chan
, priv
->capability
.channels
- 1);
1484 return TVI_CONTROL_FALSE
;
1487 for (i
= 0; i
< priv
->capability
.channels
; i
++)
1489 if (priv
->channels
[i
].channel
== req_chan
)
1490 chan
= priv
->channels
[i
];
1493 if (ioctl(priv
->video_fd
, VIDIOCSCHAN
, &chan
) == -1)
1495 mp_msg(MSGT_TV
, MSGL_ERR
, "ioctl set chan failed: %s\n", strerror(errno
));
1496 return TVI_CONTROL_FALSE
;
1498 mp_msg(MSGT_TV
, MSGL_INFO
, "Using input '%s'\n", chan
.name
);
1500 priv
->act_channel
= i
;
1502 /* update tuner state */
1503 // if (priv->capability.type & VID_TYPE_TUNER)
1504 if (priv
->channels
[priv
->act_channel
].flags
& VIDEO_VC_TUNER
)
1505 control(priv
, TVI_CONTROL_TUN_GET_TUNER
, 0);
1507 /* update local channel list */
1508 control(priv
, TVI_CONTROL_SPC_GET_INPUT
, &req_chan
);
1509 return TVI_CONTROL_TRUE
;
1510 case TVI_CONTROL_IMMEDIATE
:
1511 priv
->immediate_mode
= 1;
1512 return TVI_CONTROL_TRUE
;
1514 case TVI_CONTROL_VBI_INIT
:
1517 tt_stream_props tsp
;
1519 if (vbi_init(priv
,*(char**)arg
)!=TVI_CONTROL_TRUE
)
1520 return TVI_CONTROL_FALSE
;
1521 if(vbi_get_props(priv
,&tsp
)==TVI_CONTROL_TRUE
)
1524 if(teletext_control(NULL
,TV_VBI_CONTROL_START
,&ptr
)==VBI_CONTROL_TRUE
)
1527 priv
->priv_vbi
=NULL
;
1529 return TVI_CONTROL_TRUE
;
1531 case TVI_CONTROL_GET_VBI_PTR
:
1532 *(void **)arg
=priv
->priv_vbi
;
1533 return TVI_CONTROL_TRUE
;
1536 return TVI_CONTROL_UNKNOWN
;
1539 static int set_mute(priv_t
* priv
,int value
)
1541 if (!priv
->capability
.audios
) {
1545 priv
->audio
[priv
->audio_id
].flags
|=VIDEO_AUDIO_MUTE
;
1547 priv
->audio
[priv
->audio_id
].flags
&= ~VIDEO_AUDIO_MUTE
;
1549 if(ioctl(priv
->video_fd
, VIDIOCSAUDIO
, &priv
->audio
[priv
->audio_id
])<0)
1554 // copies a video frame
1555 // for YV12 swaps the 2nd and 3rd plane
1556 static inline void copy_frame(priv_t
*priv
, unsigned char *dest
, unsigned char *source
)
1558 if(priv
->tv_param
->automute
>0){
1559 if (ioctl(priv
->video_fd
, VIDIOCGTUNER
, &priv
->tuner
) >= 0) {
1560 if(priv
->tv_param
->automute
<<8>priv
->tuner
.signal
){
1561 fill_blank_frame(dest
,priv
->bytesperline
* priv
->height
,priv
->format
);
1568 // YV12 uses VIDEO_PALETTE_YUV420P, but the planes are swapped
1569 if (priv
->format
== IMGFMT_YV12
) {
1570 fast_memcpy(dest
, source
, priv
->width
* priv
->height
);
1571 fast_memcpy(dest
+priv
->width
* priv
->height
*5/4, source
+priv
->width
* priv
->height
, priv
->width
* priv
->height
/4);
1572 fast_memcpy(dest
+priv
->width
* priv
->height
, source
+priv
->width
* priv
->height
*5/4, priv
->width
* priv
->height
/4);
1576 fast_memcpy(dest
, source
, priv
->bytesperline
* priv
->height
);
1579 // maximum skew change, in frames
1580 #define MAX_SKEW_DELTA 0.6
1581 static void *video_grabber(void *data
)
1583 #define MAXTOL (priv->nbuf)
1584 priv_t
*priv
= (priv_t
*)data
;
1585 struct timeval curtime
;
1586 long long skew
, prev_skew
, xskew
, interval
, prev_interval
;
1593 /* start the capture process */
1595 if ( priv
->tv_param
->mjpeg
)
1597 mp_msg(MSGT_TV
, MSGL_INFO
, " MJP: gonna capture ! \n");
1598 for (i
=0; i
< priv
->nbuf
; i
++) {
1600 if (ioctl(priv
->video_fd
, MJPIOC_QBUF_CAPT
, &num
) < 0)
1601 mp_msg(MSGT_TV
, MSGL_ERR
,
1602 "\n MJP: ioctl MJPIOC_QBUF_CAPT b failed: %s\n", strerror(errno
));
1607 for (i
=0; i
< priv
->nbuf
; i
++) {
1608 if (ioctl(priv
->video_fd
, VIDIOCMCAPTURE
, &priv
->buf
[i
]) == -1)
1609 mp_msg(MSGT_TV
, MSGL_ERR
, "\nioctl mcapture failed: %s\n", strerror(errno
));
1613 gettimeofday(&curtime
, NULL
);
1614 priv
->starttime
= (long long)1e6
*curtime
.tv_sec
+ curtime
.tv_usec
;
1615 priv
->audio_skew_measure_time
= 0;
1616 pthread_mutex_unlock(&priv
->audio_starter
);
1626 for (framecount
= 0; !priv
->shutdown
;)
1628 for (i
= 0; i
< priv
->nbuf
&& !priv
->shutdown
; i
++, framecount
++) {
1630 if (priv
->immediate_mode
) {
1631 while (priv
->video_cnt
== priv
->video_buffer_size_max
) {
1633 if (priv
->shutdown
) {
1641 if ( priv
->tv_param
->mjpeg
)
1643 while (ioctl(priv
->video_fd
, MJPIOC_SYNC
, &priv
->buf
[frame
].frame
) < 0 &&
1644 (errno
== EAGAIN
|| errno
== EINTR
));
1648 while (ioctl(priv
->video_fd
, VIDIOCSYNC
, &priv
->buf
[frame
].frame
) < 0 &&
1649 (errno
== EAGAIN
|| errno
== EINTR
));
1651 mp_dbg(MSGT_TV
, MSGL_DBG3
, "\npicture sync failed\n");
1653 gettimeofday(&curtime
, NULL
);
1654 if (!priv
->immediate_mode
) {
1655 interval
= (long long)1e6
*curtime
.tv_sec
+ curtime
.tv_usec
- priv
->starttime
;
1657 interval
= (long long)1e6
*framecount
/priv
->fps
;
1660 if (!priv
->immediate_mode
) {
1661 long long period
, orig_interval
;
1663 if (tolerance
== 0) {
1664 if (interval
- prev_interval
== 0) {
1665 mp_msg(MSGT_TV
, MSGL_V
, "\nvideo capture thread: frame delta = 0\n");
1666 } else if ((interval
- prev_interval
< (long long)0.85e6
/priv
->fps
)
1667 || (interval
- prev_interval
> (long long)1.15e6
/priv
->fps
) ) {
1668 mp_msg(MSGT_TV
, MSGL_V
, "\nvideo capture thread: frame delta ~ %.1f fps\n",
1669 (double)1e6
/(interval
- prev_interval
));
1673 // correct the rate fluctuations on a small scale
1674 orig_interval
= interval
;
1675 period
= priv
->video_interval_sum
/VIDEO_AVG_BUFFER_SIZE
;
1676 if (interval
- prev_interval
> 105*period
/100) {
1677 if (tolerance
> 0) {
1678 mp_msg(MSGT_TV
, MSGL_DBG3
, "correcting timestamp\n");
1679 interval
= prev_interval
+ priv
->video_interval_sum
/VIDEO_AVG_BUFFER_SIZE
;
1682 mp_msg(MSGT_TV
, MSGL_DBG3
, "bad - frames were dropped\n");
1686 if (tolerance
< MAXTOL
) {
1687 mp_msg(MSGT_TV
, MSGL_DBG3
, "fluctuation overcome\n");
1692 priv
->video_interval_sum
-= priv
->video_avg_buffer
[priv
->video_avg_ptr
];
1693 priv
->video_avg_buffer
[priv
->video_avg_ptr
++] = orig_interval
-prev_interval
;
1694 priv
->video_interval_sum
+= orig_interval
-prev_interval
;
1695 if (priv
->video_avg_ptr
>= VIDEO_AVG_BUFFER_SIZE
) priv
->video_avg_ptr
= 0;
1697 // fprintf(stderr, "fps: %f\n", (double)1e6*VIDEO_AVG_BUFFER_SIZE/priv->video_interval_sum);
1699 // interpolate the skew in time
1700 pthread_mutex_lock(&priv
->skew_mutex
);
1701 xskew
= priv
->audio_skew
+ (interval
- priv
->audio_skew_measure_time
)*priv
->audio_skew_factor
;
1702 pthread_mutex_unlock(&priv
->skew_mutex
);
1703 // correct extreme skew changes to avoid (especially) moving backwards in time
1704 if (xskew
- prev_skew
> (interval
- prev_interval
)*MAX_SKEW_DELTA
) {
1705 skew
= prev_skew
+ (interval
- prev_interval
)*MAX_SKEW_DELTA
;
1706 } else if (xskew
- prev_skew
< -(interval
- prev_interval
)*MAX_SKEW_DELTA
) {
1707 skew
= prev_skew
- (interval
- prev_interval
)*MAX_SKEW_DELTA
;
1713 mp_msg(MSGT_TV
, MSGL_DBG3
, "\nfps = %f, interval = %f, a_skew = %f, corr_skew = %f\n",
1714 (interval
!= prev_interval
) ? (double)1e6
/(interval
- prev_interval
) : -1,
1715 (double)1e-6*interval
, (double)1e-6*xskew
, (double)1e-6*skew
);
1716 mp_msg(MSGT_TV
, MSGL_DBG3
, "vcnt = %d, acnt = %d\n", priv
->video_cnt
, priv
->audio_cnt
);
1719 prev_interval
= interval
;
1721 /* allocate a new buffer, if needed */
1722 pthread_mutex_lock(&priv
->video_buffer_mutex
);
1723 if (priv
->video_buffer_size_current
< priv
->video_buffer_size_max
) {
1724 if (priv
->video_cnt
== priv
->video_buffer_size_current
) {
1725 unsigned char *newbuf
= calloc(priv
->bytesperline
, priv
->height
);
1727 memmove(priv
->video_ringbuffer
+priv
->video_tail
+1, priv
->video_ringbuffer
+priv
->video_tail
,
1728 (priv
->video_buffer_size_current
-priv
->video_tail
)*sizeof(unsigned char *));
1729 memmove(priv
->video_timebuffer
+priv
->video_tail
+1, priv
->video_timebuffer
+priv
->video_tail
,
1730 (priv
->video_buffer_size_current
-priv
->video_tail
)*sizeof(long long));
1731 priv
->video_ringbuffer
[priv
->video_tail
] = newbuf
;
1732 if ((priv
->video_head
>= priv
->video_tail
) && (priv
->video_cnt
> 0)) priv
->video_head
++;
1733 priv
->video_buffer_size_current
++;
1737 pthread_mutex_unlock(&priv
->video_buffer_mutex
);
1739 if (priv
->video_cnt
== priv
->video_buffer_size_current
) {
1740 if (!priv
->immediate_mode
) {
1741 mp_msg(MSGT_TV
, MSGL_ERR
, "\nvideo buffer full - dropping frame\n");
1744 if (priv
->immediate_mode
) {
1745 priv
->video_timebuffer
[priv
->video_tail
] = interval
;
1747 // compensate for audio skew
1748 // negative skew => there are more audio samples, increase interval
1749 // positive skew => less samples, shorten the interval
1750 priv
->video_timebuffer
[priv
->video_tail
] = interval
- skew
;
1753 if ( priv
->tv_param
->mjpeg
)
1754 copy_frame(priv
, priv
->video_ringbuffer
[priv
->video_tail
],
1755 priv
->mmap
+(priv
->mjpeg_bufsize
)*i
);
1757 copy_frame(priv
, priv
->video_ringbuffer
[priv
->video_tail
],
1758 priv
->mmap
+priv
->mbuf
.offsets
[frame
]);
1759 priv
->video_tail
= (priv
->video_tail
+1)%priv
->video_buffer_size_current
;
1763 if ( priv
->tv_param
->mjpeg
)
1766 if (ioctl(priv
->video_fd
, MJPIOC_QBUF_CAPT
, &num
) < 0)
1768 mp_msg(MSGT_TV
, MSGL_ERR
, "\n MJP: ioctl MJPIOC_QBUF_CAPT end failed: %s\n",
1775 if (ioctl(priv
->video_fd
, VIDIOCMCAPTURE
, &priv
->buf
[frame
]) == -1)
1777 mp_msg(MSGT_TV
, MSGL_ERR
, "\nioctl mcapture failed: %s\n", strerror(errno
));
1783 mp_msg(MSGT_TV
, MSGL_INFO
, " MJP: returning! \n");
1787 static double grab_video_frame(priv_t
*priv
, char *buffer
, int len
)
1792 pthread_create(&priv
->video_grabber_thread
, NULL
, video_grabber
, priv
);
1796 while (priv
->video_cnt
== 0) {
1800 pthread_mutex_lock(&priv
->video_buffer_mutex
);
1801 interval
= (double)priv
->video_timebuffer
[priv
->video_head
]*1e-6;
1802 fast_memcpy(buffer
, priv
->video_ringbuffer
[priv
->video_head
], len
);
1804 priv
->video_head
= (priv
->video_head
+1)%priv
->video_buffer_size_current
;
1805 pthread_mutex_unlock(&priv
->video_buffer_mutex
);
1810 static int get_video_framesize(priv_t
*priv
)
1812 return priv
->bytesperline
* priv
->height
;
1815 static void *audio_grabber(void *data
)
1817 priv_t
*priv
= (priv_t
*)data
;
1819 int i
, audio_skew_ptr
= 0;
1820 long long current_time
, prev_skew
= 0;
1822 pthread_mutex_lock(&priv
->audio_starter
);
1824 audio_in_start_capture(&priv
->audio_in
);
1825 for (i
= 0; i
< priv
->aud_skew_cnt
; i
++)
1826 priv
->audio_skew_buffer
[i
] = 0;
1828 for (; !priv
->shutdown
;)
1830 if (audio_in_read_chunk(&priv
->audio_in
, priv
->audio_ringbuffer
+priv
->audio_tail
*priv
->audio_in
.blocksize
) < 0)
1833 gettimeofday(&tv
, NULL
);
1835 priv
->audio_recv_blocks_total
++;
1836 current_time
= (long long)1e6
*tv
.tv_sec
+ tv
.tv_usec
- priv
->starttime
;
1838 priv
->audio_skew_total
-= priv
->audio_skew_buffer
[audio_skew_ptr
];
1839 priv
->audio_skew_buffer
[audio_skew_ptr
] = current_time
1840 - 1e6
*priv
->audio_secs_per_block
*priv
->audio_recv_blocks_total
;
1841 priv
->audio_skew_total
+= priv
->audio_skew_buffer
[audio_skew_ptr
];
1842 audio_skew_ptr
= (audio_skew_ptr
+1) % priv
->aud_skew_cnt
;
1844 pthread_mutex_lock(&priv
->skew_mutex
);
1845 // linear interpolation - here we interpolate current skew value
1846 // from the moving average, which we expect to be in the middle
1848 if (priv
->audio_recv_blocks_total
> priv
->aud_skew_cnt
) {
1849 priv
->audio_skew
= priv
->audio_skew_total
/priv
->aud_skew_cnt
;
1850 priv
->audio_skew
+= (priv
->audio_skew
*priv
->aud_skew_cnt
)/(2*priv
->audio_recv_blocks_total
-priv
->aud_skew_cnt
);
1852 // this smoothes the evolution of audio_skew at startup a bit
1853 priv
->audio_skew
= ((priv
->aud_skew_cnt
+priv
->audio_recv_blocks_total
)*priv
->audio_skew_total
)/(priv
->aud_skew_cnt
*priv
->audio_recv_blocks_total
);
1855 // current skew factor (assuming linearity)
1856 // used for further interpolation in video_grabber
1857 // probably overkill but seems to be necessary for
1858 // stress testing by dropping half of the audio frames ;)
1859 // especially when using ALSA with large block sizes
1860 // where audio_skew remains a long while behind
1861 if ((priv
->audio_skew_measure_time
!= 0) && (current_time
- priv
->audio_skew_measure_time
!= 0)) {
1862 priv
->audio_skew_factor
= (double)(priv
->audio_skew
-prev_skew
)/(current_time
- priv
->audio_skew_measure_time
);
1864 priv
->audio_skew_factor
= 0.0;
1867 priv
->audio_skew_measure_time
= current_time
;
1868 prev_skew
= priv
->audio_skew
;
1869 pthread_mutex_unlock(&priv
->skew_mutex
);
1871 if ((priv
->audio_tail
+1) % priv
->audio_buffer_size
== priv
->audio_head
) {
1872 mp_msg(MSGT_TV
, MSGL_ERR
, "\ntoo bad - dropping audio frame !\n");
1875 priv
->audio_tail
= (priv
->audio_tail
+1) % priv
->audio_buffer_size
;
1882 static double grab_audio_frame(priv_t
*priv
, char *buffer
, int len
)
1884 mp_dbg(MSGT_TV
, MSGL_DBG2
, "grab_audio_frame(priv=%p, buffer=%p, len=%d)\n",
1888 pthread_create(&priv
->video_grabber_thread
, NULL
, video_grabber
, priv
);
1892 // compensate for dropped audio frames
1893 if (priv
->audio_drop
&& (priv
->audio_head
== priv
->audio_tail
)) {
1895 priv
->audio_sent_blocks_total
++;
1896 memset(buffer
, 0, len
);
1897 return (double)priv
->audio_sent_blocks_total
*priv
->audio_secs_per_block
;
1900 while (priv
->audio_head
== priv
->audio_tail
) {
1903 fast_memcpy(buffer
, priv
->audio_ringbuffer
+priv
->audio_head
*priv
->audio_in
.blocksize
, len
);
1904 priv
->audio_head
= (priv
->audio_head
+1) % priv
->audio_buffer_size
;
1906 priv
->audio_sent_blocks_total
++;
1907 return (double)priv
->audio_sent_blocks_total
*priv
->audio_secs_per_block
;
1910 static int get_audio_framesize(priv_t
*priv
)
1912 return priv
->audio_in
.blocksize
;