--- /dev/null
+/*****************************************************************************
+ * imem.c : Memory input for VLC
+ *****************************************************************************
+ * Copyright (C) 2009 Laurent Aimar
+ * $Id$
+ *
+ * Author: Laurent Aimar <fenrir _AT_ videolan _DOT org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
+ *****************************************************************************/
+
+/*****************************************************************************
+ * Preamble
+ *****************************************************************************/
+
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+#include <limits.h>
+#include <math.h>
+
+#include <vlc_common.h>
+#include <vlc_plugin.h>
+#include <vlc_demux.h>
+#include <vlc_charset.h>
+
+/*****************************************************************************
+ * Module descriptior
+ *****************************************************************************/
+static int Open (vlc_object_t *);
+static void Close(vlc_object_t *);
+
+#define CACHING_TEXT N_("Caching value in ms")
+#define CACHING_LONGTEXT N_(\
+ "Caching value for imem streams. This " \
+ "value should be set in milliseconds.")
+
+#define ID_TEXT N_("ID")
+#define ID_LONGTEXT N_(\
+ "Set the ID of the elementary stream")
+
+#define GROUP_TEXT N_("Group")
+#define GROUP_LONGTEXT N_(\
+ "Set the group of the elementary stream")
+
+#define CAT_TEXT N_("Category")
+#define CAT_LONGTEXT N_(\
+ "Set the category of the elementary stream")
+static const int cat_values[] = {
+ 0, 1, 2, 3
+};
+static const char *cat_texts[] = {
+ N_("Unknown"), N_("Audio"), N_("Video"), N_("Subtitle")
+};
+
+#define CODEC_TEXT N_("Codec")
+#define CODEC_LONGTEXT N_(\
+ "Set the codec of the elementary stream")
+
+#define LANGUAGE_TEXT N_("Language")
+#define LANGUAGE_LONGTEXT N_(\
+ "Language of the elementary stream as described by ISO639")
+
+#define SAMPLERATE_TEXT N_("Sample rate")
+#define SAMPLERATE_LONGTEXT N_(\
+ "Sample rate of an audio elementary stream")
+
+#define CHANNELS_TEXT N_("Channels count")
+#define CHANNELS_LONGTEXT N_(\
+ "Channels count of an audio elementary stream")
+
+#define WIDTH_TEXT N_("Width")
+#define WIDTH_LONGTEXT N_("Width of video or subtitle elementary streams")
+
+#define HEIGHT_TEXT N_("Height")
+#define HEIGHT_LONGTEXT N_("Height of video or subtitle elementary streams")
+
+#define DAR_TEXT N_("Display aspect ratio")
+#define DAR_LONGTEXT N_(\
+ "Display aspect ratio of a video elementary stream")
+
+#define FPS_TEXT N_("Frame rate")
+#define FPS_LONGTEXT N_(\
+ "Frame rate of a video elementary stream")
+
+#define DATA_TEXT N_("Callback data")
+#define DATA_LONGTEXT N_(\
+ "Data for the get and release functions")
+
+#define GET_TEXT N_("Get function")
+#define GET_LONGTEXT N_(\
+ "Address of the get callback function")
+
+#define RELEASE_TEXT N_("Release function")
+#define RELEASE_LONGTEXT N_(\
+ "Address of the release callback function")
+
+vlc_module_begin()
+ set_shortname(N_("Memory input"))
+ set_description(N_("Memory input"))
+ set_category(CAT_INPUT)
+ set_subcategory(SUBCAT_INPUT_ACCESS)
+
+ add_integer("imem-caching", DEFAULT_PTS_DELAY / 1000, NULL, CACHING_TEXT, CACHING_LONGTEXT, true)
+ add_string ("imem-get", "0", NULL, GET_TEXT, GET_LONGTEXT, true)
+ add_string ("imem-release", "0", NULL, RELEASE_TEXT, RELEASE_LONGTEXT, true)
+ add_string ("imem-data", "0", NULL, DATA_TEXT, DATA_LONGTEXT, true)
+
+ add_integer("imem-id", -1, NULL, ID_TEXT, ID_LONGTEXT, true)
+ add_integer("imem-group", 0, NULL, GROUP_TEXT, GROUP_LONGTEXT, true)
+ add_integer("imem-cat", 0, NULL, CAT_TEXT, CAT_LONGTEXT, true)
+ change_integer_list(cat_values, cat_texts, NULL)
+ add_string ("imem-codec", NULL, NULL, CODEC_TEXT, CODEC_LONGTEXT, true)
+ add_string( "imem-language", NULL, NULL, LANGUAGE_TEXT, LANGUAGE_LONGTEXT, false);
+
+ add_integer("imem-samplerate", 0, NULL, SAMPLERATE_TEXT, SAMPLERATE_LONGTEXT, true)
+ add_integer("imem-channels", 0, NULL, CHANNELS_TEXT, CHANNELS_LONGTEXT, true)
+
+ add_integer("imem-width", 0, NULL, WIDTH_TEXT, WIDTH_LONGTEXT, true)
+ add_integer("imem-height", 0, NULL, HEIGHT_TEXT, HEIGHT_LONGTEXT, true)
+ add_string ("imem-dar", NULL, NULL, DAR_TEXT, DAR_LONGTEXT, true)
+ add_string ("imem-fps", NULL, NULL, FPS_TEXT, FPS_LONGTEXT, true)
+
+ add_shortcut("imem")
+ set_capability("access_demux", 0)
+ set_callbacks(Open, Close)
+vlc_module_end()
+
+/*****************************************************************************
+ * Exported API
+ *****************************************************************************/
+
+/* The clock origin for the DTS and PTS is assumed to be 0.
+ * A negative value means unknown.
+ *
+ * TODO define flags
+ */
+typedef int (*imem_get_t)(void *data,
+ int64_t *dts, int64_t *pts, unsigned *flags,
+ size_t *, void **);
+typedef void (*imem_release_t)(void *data, size_t, void *);
+
+/*****************************************************************************
+ * Local prototypes
+ *****************************************************************************/
+
+/* */
+static int Demux(demux_t *);
+static int Control(demux_t *, int, va_list);
+
+/* */
+struct demux_sys_t {
+ struct {
+ imem_get_t get;
+ imem_release_t release;
+ void *data;
+ } source;
+
+ es_out_id_t *es;
+
+ mtime_t pts_delay;
+
+ mtime_t dts;
+
+ mtime_t deadline;
+};
+
+static void ParseMRL(demux_t *);
+static int var_CreateGetRational(demux_t *,
+ unsigned *num, unsigned *den,
+ const char *var);
+
+/**
+ * It opens an imem access_demux
+ */
+static int Open(vlc_object_t *object)
+{
+ demux_t *demux = (demux_t*)object;
+ char *tmp;
+
+ /* */
+ demux_sys_t *sys = calloc(1, sizeof(*sys));
+ if (!sys)
+ return VLC_ENOMEM;
+
+ /* Read the user functions */
+ tmp = var_CreateGetString(demux, "imem-get");
+ if (tmp)
+ sys->source.get = (imem_get_t)(intptr_t)strtoll(tmp, NULL, 0);
+ free(tmp);
+
+ tmp = var_CreateGetString(demux, "imem-release");
+ if (tmp)
+ sys->source.release = (imem_release_t)(intptr_t)strtoll(tmp, NULL, 0);
+ free(tmp);
+
+ if (!sys->source.get || !sys->source.release) {
+ msg_Err(demux, "Invalid get/release function pointers");
+ free(sys);
+ return VLC_EGENERIC;
+ }
+
+ /* Now we can parse the MRL (get/release must not be parsed to avoid
+ * security risks) */
+ if (*demux->psz_path)
+ ParseMRL(demux);
+
+ tmp = var_CreateGetString(demux, "imem-data");
+ if (tmp)
+ sys->source.data = (void*)(intptr_t)strtoll(tmp, NULL, 0);
+ free(tmp);
+
+ msg_Dbg(demux, "Using get(%p) release(%p) and data(%p)",
+ sys->source.get, sys->source.release, sys->source.data);
+
+ /* ES format */
+ es_format_t fmt;
+ es_format_Init(&fmt, UNKNOWN_ES, 0);
+
+ fmt.i_id = var_CreateGetInteger(demux, "imem-id");
+ fmt.i_group = var_CreateGetInteger(demux, "imem-group");
+
+ tmp = var_CreateGetString(demux, "imem-codec");
+ if (tmp)
+ fmt.i_codec = vlc_fourcc_GetCodecFromString(UNKNOWN_ES, tmp);
+ free(tmp);
+
+ switch (var_CreateGetInteger(demux, "imem-cat")) {
+ case 1: {
+ fmt.i_cat = AUDIO_ES;
+ fmt.audio.i_channels = var_CreateGetInteger(demux, "imem-channels");
+ fmt.audio.i_rate = var_CreateGetInteger(demux, "imem-samplerate");
+
+ msg_Dbg(demux, "Audio %4.4s %d channels %d Hz",
+ (const char *)&fmt.i_codec,
+ fmt.audio.i_channels, fmt.audio.i_rate);
+ break;
+ }
+ case 2: {
+ fmt.i_cat = VIDEO_ES;
+ fmt.video.i_width = var_CreateGetInteger(demux, "imem-width");
+ fmt.video.i_height = var_CreateGetInteger(demux, "imem-height");
+ unsigned num, den;
+ if (!var_CreateGetRational(demux, &num, &den, "imem-dar") && num > 0 && den > 0) {
+ fmt.video.i_aspect = VOUT_ASPECT_FACTOR * num / den;
+ if (fmt.video.i_width > 0 && fmt.video.i_height > 0) {
+ fmt.video.i_sar_num = num * fmt.video.i_height;
+ fmt.video.i_sar_den = den * fmt.video.i_width;
+ }
+ }
+ if (!var_CreateGetRational(demux, &num, &den, "imem-fps") && num > 0 && den > 0) {
+ fmt.video.i_frame_rate = num;
+ fmt.video.i_frame_rate_base = den;
+ }
+
+ msg_Dbg(demux, "Video %4.4s %dx%d SAR %d:%d frame rate %u/%u",
+ (const char *)&fmt.i_codec,
+ fmt.video.i_width, fmt.video.i_height,
+ fmt.video.i_sar_num, fmt.video.i_sar_den,
+ fmt.video.i_frame_rate, fmt.video.i_frame_rate_base);
+ break;
+ }
+ case 3: {
+ fmt.i_cat = SPU_ES;
+ fmt.subs.spu.i_original_frame_width =
+ var_CreateGetInteger(demux, "imem-width");
+ fmt.subs.spu.i_original_frame_height =
+ var_CreateGetInteger(demux, "imem-height");
+
+ msg_Dbg(demux, "Subtitle %4.4s",
+ (const char *)&fmt.i_codec);
+ break;
+ }
+ default:
+ msg_Err(demux, "Invalid ES category");
+ es_format_Clean(&fmt);
+ free(sys);
+ return VLC_EGENERIC;
+ }
+
+ fmt.psz_language = var_CreateGetString(demux, "imem-language");
+
+ /* */
+ sys->es = es_out_Add(demux->out, &fmt);
+ es_format_Clean(&fmt);
+
+ if (!sys->es) {
+ free(sys);
+ return VLC_EGENERIC;
+ }
+
+ /* */
+ sys->pts_delay = var_CreateGetInteger(demux, "imem-caching") * INT64_C(1000);
+ sys->dts = 0;
+ sys->deadline = VLC_TS_INVALID;
+
+ /* Set up demux */
+ demux->pf_control = Control;
+ demux->pf_demux = Demux;
+ demux->p_sys = sys;
+
+ demux->info.i_update = 0;
+ demux->info.i_title = 0;
+ demux->info.i_seekpoint = 0;
+ return VLC_SUCCESS;
+}
+
+/**
+ * It closes an imem access_demux
+ */
+static void Close(vlc_object_t *object)
+{
+ demux_t *demux = (demux_t *)object;
+
+ free(demux->p_sys);
+}
+
+/**
+ * It controls imem
+ */
+static int Control(demux_t *demux, int i_query, va_list args)
+{
+ demux_sys_t *sys = demux->p_sys;
+
+ switch (i_query)
+ {
+ case DEMUX_CAN_PAUSE:
+ case DEMUX_CAN_CONTROL_PACE: {
+ bool *b = va_arg(args, bool *);
+ *b = true;
+ return VLC_SUCCESS;
+ }
+ case DEMUX_SET_PAUSE_STATE:
+ return VLC_SUCCESS;
+
+ case DEMUX_GET_PTS_DELAY: {
+ int64_t *delay = va_arg(args, int64_t *);
+ *delay = sys->pts_delay;
+ return VLC_SUCCESS;
+ }
+ case DEMUX_GET_POSITION: {
+ double *position = va_arg(args, double *);
+ *position = 0.0;
+ return VLC_SUCCESS;
+ }
+ case DEMUX_GET_TIME: {
+ int64_t *t = va_arg(args, int64_t *);
+ *t = sys->dts;
+ return VLC_SUCCESS;
+ }
+ case DEMUX_GET_LENGTH: {
+ int64_t *l = va_arg(args, int64_t *);
+ *l = 0;
+ return VLC_SUCCESS;
+ }
+ case DEMUX_SET_NEXT_DEMUX_TIME:
+ sys->deadline = va_arg(args, int64_t);
+ return VLC_SUCCESS;
+
+ /* */
+ case DEMUX_CAN_SEEK:
+ case DEMUX_SET_POSITION:
+ case DEMUX_SET_TIME:
+ default:
+ return VLC_EGENERIC;
+ }
+
+ return VLC_EGENERIC;
+}
+
+/**
+ * It retreives data using the get() callback, sends them to es_out
+ * and the release it using the release() callback.
+ */
+static int Demux(demux_t *demux)
+{
+ demux_sys_t *sys = demux->p_sys;
+
+ if (sys->deadline == VLC_TS_INVALID)
+ sys->deadline = sys->dts + 1;
+
+ for (;;) {
+ if (sys->deadline <= sys->dts)
+ break;
+
+ /* */
+ int64_t dts, pts;
+ unsigned flags;
+ size_t buffer_size;
+ void *buffer;
+
+ if (sys->source.get(sys->source.data, &dts, &pts, &flags, &buffer_size, &buffer))
+ return 0;
+
+ if (dts < 0)
+ dts = pts;
+
+ if (buffer_size > 0) {
+ block_t *block = block_New(demux, buffer_size);
+ if (block) {
+ block->i_dts = dts >= 0 ? (1 + dts) : VLC_TS_INVALID;
+ block->i_pts = pts >= 0 ? (1 + pts) : VLC_TS_INVALID;
+ memcpy(block->p_buffer, buffer, buffer_size);
+
+ es_out_Control(demux->out, ES_OUT_SET_PCR, block->i_dts);
+ es_out_Send(demux->out, sys->es, block);
+ }
+ }
+
+ sys->dts = dts;
+
+ sys->source.release(sys->source.data, buffer_size, buffer);
+ }
+ sys->deadline = VLC_TS_INVALID;
+ return 1;
+}
+
+/**
+ * It parses a rational number (it also accepts basic float number).
+ *
+ * It returns an error if the rational number cannot be parsed (0/0 is valid).
+ */
+static int var_CreateGetRational(demux_t *demux,
+ unsigned *num, unsigned *den,
+ const char *var)
+{
+ /* */
+ *num = 0;
+ *den = 0;
+
+ /* */
+ char *tmp = var_CreateGetString(demux, var);
+ if (!tmp)
+ goto error;
+
+ char *next;
+ unsigned n = strtol(tmp, &next, 0);
+ unsigned d = strtol(*next ? &next[1] : "0", NULL, 0);
+
+ if (*next == '.') {
+ /* Interpret as a float number */
+ double r = us_atof(tmp);
+ double c = ceil(r);
+ if (c >= UINT_MAX)
+ goto error;
+ unsigned m = c;
+ if (m > 0) {
+ d = UINT_MAX / m;
+ n = r * d;
+ } else {
+ n = 0;
+ d = 0;
+ }
+ }
+
+ if (n > 0 && d > 0)
+ vlc_ureduce(num, den, n, d, 0);
+
+ free(tmp);
+ return VLC_SUCCESS;
+
+error:
+ free(tmp);
+ return VLC_EGENERIC;
+}
+
+/**
+ * Parse the MRL and extract configuration from it.
+ *
+ * Syntax: option1=value1[:option2=value2[...]]
+ *
+ * XXX get and release are not supported on purpose.
+ */
+static void ParseMRL(demux_t *demux)
+{
+ static const struct {
+ const char *name;
+ int type;
+ } options[] = {
+ { "caching", VLC_VAR_INTEGER },
+ { "id", VLC_VAR_INTEGER },
+ { "group", VLC_VAR_INTEGER },
+ { "cat", VLC_VAR_INTEGER },
+ { "samplerate", VLC_VAR_INTEGER },
+ { "channels", VLC_VAR_INTEGER },
+ { "width", VLC_VAR_INTEGER },
+ { "height", VLC_VAR_INTEGER },
+ { "data", VLC_VAR_STRING },
+ { "codec", VLC_VAR_STRING },
+ { "language", VLC_VAR_STRING },
+ { "dar", VLC_VAR_STRING },
+ { "fps", VLC_VAR_STRING },
+ { NULL, -1 }
+ };
+
+ char *dup = strdup(demux->psz_path);
+ if (!dup)
+ return;
+ char *current = dup;
+
+ while (current) {
+ char *next = strchr(current, ':');
+ if (next)
+ *next++ = '\0';
+
+ char *option = current;
+ char *value = strchr(current, '=');
+ if (value) {
+ *value++ = '\0';
+ msg_Dbg(demux, "option '%s' value '%s'", option, value);
+ } else {
+ msg_Dbg(demux, "option '%s' without value (unsupported)", option);
+ }
+
+ char *name;
+ if (asprintf(&name, "imem-%s", option) < 0)
+ name = NULL;
+ for (unsigned i = 0; name && options[i].name; i++) {
+ if (strcmp(options[i].name, option))
+ continue;
+ /* */
+ var_Create(demux, name, options[i].type | VLC_VAR_DOINHERIT);
+ if (options[i].type == VLC_VAR_INTEGER && value) {
+ var_SetInteger(demux, name, strtol(value, NULL, 0));
+ } else if (options[i].type == VLC_VAR_STRING && value) {
+ var_SetString(demux, name, value);
+ }
+ break;
+ }
+ free(name);
+
+ /* */
+ current = next;
+ }
+ free(dup);
+}
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