1 /*****************************************************************************
2 * imem.c : Memory input for VLC
3 *****************************************************************************
4 * Copyright (C) 2009-2010 Laurent Aimar
7 * Author: Laurent Aimar <fenrir _AT_ videolan _DOT org>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
22 *****************************************************************************/
24 /*****************************************************************************
26 *****************************************************************************/
34 #include <vlc_common.h>
35 #include <vlc_plugin.h>
36 #include <vlc_access.h>
37 #include <vlc_demux.h>
38 #include <vlc_charset.h>
40 /*****************************************************************************
42 *****************************************************************************/
43 static int OpenAccess (vlc_object_t *);
44 static void CloseAccess(vlc_object_t *);
46 static int OpenDemux (vlc_object_t *);
47 static void CloseDemux(vlc_object_t *);
49 #define CACHING_TEXT N_("Caching value in ms")
50 #define CACHING_LONGTEXT N_(\
51 "Caching value for imem streams. This " \
52 "value should be set in milliseconds.")
54 #define ID_TEXT N_("ID")
55 #define ID_LONGTEXT N_(\
56 "Set the ID of the elementary stream")
58 #define GROUP_TEXT N_("Group")
59 #define GROUP_LONGTEXT N_(\
60 "Set the group of the elementary stream")
62 #define CAT_TEXT N_("Category")
63 #define CAT_LONGTEXT N_(\
64 "Set the category of the elementary stream")
65 static const int cat_values[] = {
68 static const char *cat_texts[] = {
69 N_("Unknown"), N_("Audio"), N_("Video"), N_("Subtitle"), N_("Data")
72 #define CODEC_TEXT N_("Codec")
73 #define CODEC_LONGTEXT N_(\
74 "Set the codec of the elementary stream")
76 #define LANGUAGE_TEXT N_("Language")
77 #define LANGUAGE_LONGTEXT N_(\
78 "Language of the elementary stream as described by ISO639")
80 #define SAMPLERATE_TEXT N_("Sample rate")
81 #define SAMPLERATE_LONGTEXT N_(\
82 "Sample rate of an audio elementary stream")
84 #define CHANNELS_TEXT N_("Channels count")
85 #define CHANNELS_LONGTEXT N_(\
86 "Channels count of an audio elementary stream")
88 #define WIDTH_TEXT N_("Width")
89 #define WIDTH_LONGTEXT N_("Width of video or subtitle elementary streams")
91 #define HEIGHT_TEXT N_("Height")
92 #define HEIGHT_LONGTEXT N_("Height of video or subtitle elementary streams")
94 #define DAR_TEXT N_("Display aspect ratio")
95 #define DAR_LONGTEXT N_(\
96 "Display aspect ratio of a video elementary stream")
98 #define FPS_TEXT N_("Frame rate")
99 #define FPS_LONGTEXT N_(\
100 "Frame rate of a video elementary stream")
102 #define COOKIE_TEXT N_("Callback cookie string")
103 #define COOKIE_LONGTEXT N_(\
104 "Text identifier for the callback functions")
106 #define DATA_TEXT N_("Callback data")
107 #define DATA_LONGTEXT N_(\
108 "Data for the get and release functions")
110 #define GET_TEXT N_("Get function")
111 #define GET_LONGTEXT N_(\
112 "Address of the get callback function")
114 #define RELEASE_TEXT N_("Release function")
115 #define RELEASE_LONGTEXT N_(\
116 "Address of the release callback function")
118 #define SIZE_TEXT N_("Size")
119 #define SIZE_LONGTEXT N_(\
120 "Size of stream in bytes")
123 set_shortname(N_("Memory input"))
124 set_description(N_("Memory input"))
125 set_category(CAT_INPUT)
126 set_subcategory(SUBCAT_INPUT_ACCESS)
128 add_integer("imem-caching", DEFAULT_PTS_DELAY / 1000, NULL, CACHING_TEXT, CACHING_LONGTEXT, true)
130 add_string ("imem-get", "0", NULL, GET_TEXT, GET_LONGTEXT, true)
132 add_string ("imem-release", "0", NULL, RELEASE_TEXT, RELEASE_LONGTEXT, true)
134 add_string ("imem-cookie", NULL, NULL, COOKIE_TEXT, COOKIE_LONGTEXT, true)
137 add_string ("imem-data", "0", NULL, DATA_TEXT, DATA_LONGTEXT, true)
140 add_integer("imem-id", -1, NULL, ID_TEXT, ID_LONGTEXT, true)
143 add_integer("imem-group", 0, NULL, GROUP_TEXT, GROUP_LONGTEXT, true)
146 add_integer("imem-cat", 0, NULL, CAT_TEXT, CAT_LONGTEXT, true)
147 change_integer_list(cat_values, cat_texts, NULL)
150 add_string ("imem-codec", NULL, NULL, CODEC_TEXT, CODEC_LONGTEXT, true)
153 add_string( "imem-language", NULL, NULL, LANGUAGE_TEXT, LANGUAGE_LONGTEXT, false)
157 add_integer("imem-samplerate", 0, NULL, SAMPLERATE_TEXT, SAMPLERATE_LONGTEXT, true)
160 add_integer("imem-channels", 0, NULL, CHANNELS_TEXT, CHANNELS_LONGTEXT, true)
164 add_integer("imem-width", 0, NULL, WIDTH_TEXT, WIDTH_LONGTEXT, true)
167 add_integer("imem-height", 0, NULL, HEIGHT_TEXT, HEIGHT_LONGTEXT, true)
170 add_string ("imem-dar", NULL, NULL, DAR_TEXT, DAR_LONGTEXT, true)
173 add_string ("imem-fps", NULL, NULL, FPS_TEXT, FPS_LONGTEXT, true)
177 add_integer ("imem-size", 0, NULL, SIZE_TEXT, SIZE_LONGTEXT, true)
182 set_capability("access_demux", 0)
183 set_callbacks(OpenDemux, CloseDemux)
187 set_capability("access", 0)
188 set_callbacks(OpenAccess, CloseAccess)
191 /*****************************************************************************
193 *****************************************************************************/
195 /* The clock origin for the DTS and PTS is assumed to be 0.
196 * A negative value means unknown.
200 typedef int (*imem_get_t)(void *data, const char *cookie,
201 int64_t *dts, int64_t *pts, unsigned *flags,
203 typedef void (*imem_release_t)(void *data, const char *cookie, size_t, void *);
205 /*****************************************************************************
207 *****************************************************************************/
210 static block_t *Block(access_t *);
211 static int ControlAccess(access_t *, int, va_list);
213 static int Demux(demux_t *);
214 static int ControlDemux(demux_t *, int, va_list);
220 imem_release_t release;
234 static void ParseMRL(vlc_object_t *, const char *);
237 * It closes the common part of the access and access_demux
239 static void CloseCommon(imem_sys_t *sys)
241 free(sys->source.cookie);
246 * It initializes the common part for imem access/access_demux.
248 static int OpenCommon(vlc_object_t *object, imem_sys_t **sys_ptr, const char *psz_path)
253 imem_sys_t *sys = calloc(1, sizeof(*sys));
257 /* Read the user functions */
258 tmp = var_InheritString(object, "imem-get");
260 sys->source.get = (imem_get_t)(intptr_t)strtoll(tmp, NULL, 0);
263 tmp = var_InheritString(object, "imem-release");
265 sys->source.release = (imem_release_t)(intptr_t)strtoll(tmp, NULL, 0);
268 if (!sys->source.get || !sys->source.release) {
269 msg_Err(object, "Invalid get/release function pointers");
274 tmp = var_InheritString(object, "imem-data");
276 sys->source.data = (void *)(uintptr_t)strtoull(tmp, NULL, 0);
279 /* Now we can parse the MRL (get/release must not be parsed to avoid
282 ParseMRL(object, psz_path);
284 sys->source.cookie = var_InheritString(object, "imem-cookie");
286 msg_Dbg(object, "Using get(%p), release(%p), data(%p), cookie(%s)",
287 sys->source.get, sys->source.release, sys->source.data,
288 sys->source.cookie ? sys->source.cookie : "(null)");
291 sys->pts_delay = var_InheritInteger(object, "imem-caching") * INT64_C(1000);
293 sys->deadline = VLC_TS_INVALID;
300 * It opens an imem access.
302 static int OpenAccess(vlc_object_t *object)
304 access_t *access = (access_t *)object;
307 if (OpenCommon(object, &sys, access->psz_location))
310 if (var_InheritInteger(object, "imem-cat") != 4) {
316 access_InitFields(access);
317 access->pf_control = ControlAccess;
318 access->pf_read = NULL;
319 access->pf_block = Block;
320 access->pf_seek = NULL;
321 access->p_sys = (access_sys_t*)sys;
322 access->info.i_size = var_InheritInteger(object, "imem-size");
328 * It closes an imem access
330 static void CloseAccess(vlc_object_t *object)
332 access_t *access = (access_t *)object;
334 CloseCommon((imem_sys_t*)access->p_sys);
338 * It controls an imem access
340 static int ControlAccess(access_t *access, int i_query, va_list args)
342 imem_sys_t *sys = (imem_sys_t*)access->p_sys;
346 case ACCESS_CAN_SEEK:
347 case ACCESS_CAN_FASTSEEK: {
348 bool *b = va_arg( args, bool* );
352 case ACCESS_CAN_PAUSE:
353 case ACCESS_CAN_CONTROL_PACE: {
354 bool *b = va_arg( args, bool* );
358 case ACCESS_GET_PTS_DELAY: {
359 int64_t *delay = va_arg(args, int64_t *);
360 *delay = sys->pts_delay;
363 case ACCESS_SET_PAUSE_STATE:
366 case ACCESS_GET_TITLE_INFO:
367 case ACCESS_SET_TITLE:
368 case ACCESS_SET_SEEKPOINT:
369 case ACCESS_SET_PRIVATE_ID_STATE:
370 case ACCESS_GET_META:
371 case ACCESS_GET_PRIVATE_ID_STATE:
372 case ACCESS_GET_CONTENT_TYPE:
379 * It retreives data using the get() callback, copies them,
380 * and then release them using the release() callback.
382 static block_t *Block(access_t *access)
384 imem_sys_t *sys = (imem_sys_t*)access->p_sys;
390 if (sys->source.get(sys->source.data, sys->source.cookie,
391 NULL, NULL, &flags, &buffer_size, &buffer)) {
392 access->info.b_eof = true;
396 block_t *block = NULL;
397 if (buffer_size > 0) {
398 block = block_New(access, buffer_size);
400 memcpy(block->p_buffer, buffer, buffer_size);
403 sys->source.release(sys->source.data, sys->source.cookie,
404 buffer_size, buffer);
409 * It opens an imem access_demux.
411 static int OpenDemux(vlc_object_t *object)
413 demux_t *demux = (demux_t *)object;
416 if (OpenCommon(object, &sys, demux->psz_location))
421 es_format_Init(&fmt, UNKNOWN_ES, 0);
423 fmt.i_id = var_InheritInteger(object, "imem-id");
424 fmt.i_group = var_InheritInteger(object, "imem-group");
426 char *tmp = var_InheritString(object, "imem-codec");
428 fmt.i_codec = vlc_fourcc_GetCodecFromString(UNKNOWN_ES, tmp);
431 const int cat = var_InheritInteger(object, "imem-cat");
434 fmt.i_cat = AUDIO_ES;
435 fmt.audio.i_channels = var_InheritInteger(object, "imem-channels");
436 fmt.audio.i_rate = var_InheritInteger(object, "imem-samplerate");
438 msg_Dbg(object, "Audio %4.4s %d channels %d Hz",
439 (const char *)&fmt.i_codec,
440 fmt.audio.i_channels, fmt.audio.i_rate);
444 fmt.i_cat = VIDEO_ES;
445 fmt.video.i_width = var_InheritInteger(object, "imem-width");
446 fmt.video.i_height = var_InheritInteger(object, "imem-height");
448 if (!var_InheritURational(object, &num, &den, "imem-dar") && num > 0 && den > 0) {
449 if (fmt.video.i_width > 0 && fmt.video.i_height > 0) {
450 fmt.video.i_sar_num = num * fmt.video.i_height;
451 fmt.video.i_sar_den = den * fmt.video.i_width;
454 if (!var_InheritURational(object, &num, &den, "imem-fps") && num > 0 && den > 0) {
455 fmt.video.i_frame_rate = num;
456 fmt.video.i_frame_rate_base = den;
459 msg_Dbg(object, "Video %4.4s %dx%d SAR %d:%d frame rate %u/%u",
460 (const char *)&fmt.i_codec,
461 fmt.video.i_width, fmt.video.i_height,
462 fmt.video.i_sar_num, fmt.video.i_sar_den,
463 fmt.video.i_frame_rate, fmt.video.i_frame_rate_base);
468 fmt.subs.spu.i_original_frame_width =
469 var_InheritInteger(object, "imem-width");
470 fmt.subs.spu.i_original_frame_height =
471 var_InheritInteger(object, "imem-height");
473 msg_Dbg(object, "Subtitle %4.4s",
474 (const char *)&fmt.i_codec);
479 msg_Err(object, "Invalid ES category");
480 es_format_Clean(&fmt);
485 fmt.psz_language = var_InheritString(object, "imem-language");
487 sys->es = es_out_Add(demux->out, &fmt);
488 es_format_Clean(&fmt);
496 demux->pf_control = ControlDemux;
497 demux->pf_demux = Demux;
498 demux->p_sys = (demux_sys_t*)sys;
500 demux->info.i_update = 0;
501 demux->info.i_title = 0;
502 demux->info.i_seekpoint = 0;
507 * It closes an imem access_demux
509 static void CloseDemux(vlc_object_t *object)
511 demux_t *demux = (demux_t *)object;
513 CloseCommon((imem_sys_t*)demux->p_sys);
517 * It controls an imem access_demux
519 static int ControlDemux(demux_t *demux, int i_query, va_list args)
521 imem_sys_t *sys = (imem_sys_t*)demux->p_sys;
525 case DEMUX_CAN_PAUSE:
526 case DEMUX_CAN_CONTROL_PACE: {
527 bool *b = va_arg(args, bool *);
531 case DEMUX_SET_PAUSE_STATE:
534 case DEMUX_GET_PTS_DELAY: {
535 int64_t *delay = va_arg(args, int64_t *);
536 *delay = sys->pts_delay;
539 case DEMUX_GET_POSITION: {
540 double *position = va_arg(args, double *);
544 case DEMUX_GET_TIME: {
545 int64_t *t = va_arg(args, int64_t *);
549 case DEMUX_GET_LENGTH: {
550 int64_t *l = va_arg(args, int64_t *);
554 case DEMUX_SET_NEXT_DEMUX_TIME:
555 sys->deadline = va_arg(args, int64_t);
560 case DEMUX_SET_POSITION:
570 * It retreives data using the get() callback, sends them to es_out
571 * and the release it using the release() callback.
573 static int Demux(demux_t *demux)
575 imem_sys_t *sys = (imem_sys_t*)demux->p_sys;
577 if (sys->deadline == VLC_TS_INVALID)
578 sys->deadline = sys->dts + 1;
581 if (sys->deadline <= sys->dts)
590 if (sys->source.get(sys->source.data, sys->source.cookie,
591 &dts, &pts, &flags, &buffer_size, &buffer))
597 if (buffer_size > 0) {
598 block_t *block = block_New(demux, buffer_size);
600 block->i_dts = dts >= 0 ? (1 + dts) : VLC_TS_INVALID;
601 block->i_pts = pts >= 0 ? (1 + pts) : VLC_TS_INVALID;
602 memcpy(block->p_buffer, buffer, buffer_size);
604 es_out_Control(demux->out, ES_OUT_SET_PCR, block->i_dts);
605 es_out_Send(demux->out, sys->es, block);
611 sys->source.release(sys->source.data, sys->source.cookie,
612 buffer_size, buffer);
614 sys->deadline = VLC_TS_INVALID;
619 * Parse the MRL and extract configuration from it.
621 * Syntax: option1=value1[:option2=value2[...]]
623 * XXX get and release are not supported on purpose.
625 static void ParseMRL(vlc_object_t *object, const char *psz_path)
627 static const struct {
631 { "caching", VLC_VAR_INTEGER },
632 { "id", VLC_VAR_INTEGER },
633 { "group", VLC_VAR_INTEGER },
634 { "cat", VLC_VAR_INTEGER },
635 { "samplerate", VLC_VAR_INTEGER },
636 { "channels", VLC_VAR_INTEGER },
637 { "width", VLC_VAR_INTEGER },
638 { "height", VLC_VAR_INTEGER },
639 { "cookie", VLC_VAR_STRING },
640 { "codec", VLC_VAR_STRING },
641 { "language", VLC_VAR_STRING },
642 { "dar", VLC_VAR_STRING },
643 { "fps", VLC_VAR_STRING },
647 char *dup = strdup(psz_path);
653 char *next = strchr(current, ':');
657 char *option = current;
658 char *value = strchr(current, '=');
661 msg_Dbg(object, "option '%s' value '%s'", option, value);
663 msg_Dbg(object, "option '%s' without value (unsupported)", option);
667 if (asprintf(&name, "imem-%s", option) < 0)
669 for (unsigned i = 0; name && options[i].name; i++) {
670 if (strcmp(options[i].name, option))
673 var_Create(object, name, options[i].type | VLC_VAR_DOINHERIT);
674 if (options[i].type == VLC_VAR_INTEGER && value) {
675 var_SetInteger(object, name, strtol(value, NULL, 0));
676 } else if (options[i].type == VLC_VAR_STRING && value) {
677 var_SetString(object, name, value);