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-rw-r--r--src/demuxers/demux_slave.c462
1 files changed, 462 insertions, 0 deletions
diff --git a/src/demuxers/demux_slave.c b/src/demuxers/demux_slave.c
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+++ b/src/demuxers/demux_slave.c
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+/*
+ * Copyright (C) 2000-2003 the xine project
+ * May 2003 - Miguel Freitas
+ * This plugin was sponsored by 1Control
+ *
+ * This file is part of xine, a free video player.
+ *
+ * xine 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.
+ *
+ * xine 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
+ *
+ * $Id: demux_slave.c,v 1.2 2003/05/15 20:23:16 miguelfreitas Exp $
+ *
+ * demuxer for slave "protocol"
+ * master xine must be started with XINE_PARAM_BROADCASTER_PORT set, that is,
+ * 'xine --broadcast-port <port_number>'
+ *
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <string.h>
+
+#include "xine_internal.h"
+#include "xineutils.h"
+#include "compat.h"
+#include "demux.h"
+
+#define SCRATCH_SIZE 1024
+#define CHECK_VPTS_INTERVAL 2*90000
+#define NETWORK_PREBUFFER 90000
+
+typedef struct {
+
+ demux_plugin_t demux_plugin;
+
+ xine_stream_t *stream;
+
+ config_values_t *config;
+
+ fifo_buffer_t *video_fifo;
+ fifo_buffer_t *audio_fifo;
+
+ input_plugin_t *input;
+
+ int64_t last_vpts;
+ int send_newpts;
+ int status;
+
+ /* additional decoder flags and other dec-spec. stuff */
+ uint32_t decoder_info[BUF_NUM_DEC_INFO];
+ /* pointers to dec-spec. stuff */
+ void *decoder_info_ptr[BUF_NUM_DEC_INFO];
+ xine_list_t *dec_infos; /* dec-spec. stuff */
+
+ uint8_t scratch[SCRATCH_SIZE+1];
+ int scratch_used;
+
+} demux_slave_t ;
+
+typedef struct {
+
+ demux_class_t demux_class;
+
+ /* class-wide, global variables here */
+
+ xine_t *xine;
+ config_values_t *config;
+} demux_slave_class_t;
+
+
+#define MAX_COMMAND_SIZE 20
+
+static int demux_slave_next (demux_slave_t *this) {
+ buf_element_t *buf;
+ int n, i;
+ char fifo_name[11];
+ uint8_t *p, *s;
+ int64_t curvpts;
+
+ /* fill the scratch buffer */
+ n = this->input->read(this->input, &this->scratch[this->scratch_used],
+ SCRATCH_SIZE - this->scratch_used);
+ this->scratch_used += n;
+ this->scratch[this->scratch_used] = '\0';
+
+ if( !n ) {
+ printf("demux_slave: connection closed\n");
+ this->status = DEMUX_FINISHED;
+ return 0;
+ }
+
+ p = strchr(this->scratch,'\n');
+ s = strchr(this->scratch,' ');
+
+ if( !s || s > p )
+ s = p;
+
+ if( !p || !s || (s-this->scratch+1) > MAX_COMMAND_SIZE ) {
+ printf("demux_slave: protocol error\n");
+ this->status = DEMUX_FINISHED;
+ return 0;
+ }
+
+ *s++ = '\0';
+ p++;
+
+ if( !strcmp(this->scratch,"buffer") ) {
+ int32_t size ; /* size of _content_ */
+ uint32_t type;
+ int64_t pts; /* presentation time stamp, used for a/v sync */
+ int64_t disc_off; /* discontinuity offset */
+ uint32_t decoder_flags; /* stuff like keyframe, is_header ... see below */
+
+ if( sscanf(s,"fifo=%10s size=%d type=%u pts=%lld disc=%lld flags=%u",
+ fifo_name, &size, &type, &pts, &disc_off, &decoder_flags) != 6 ) {
+ printf("demux_slave: 'buffer' command error\n");
+ this->status = DEMUX_FINISHED;
+ return 0;
+ }
+
+ if( type == BUF_CONTROL_NEWPTS ) {
+ this->send_newpts = 0;
+ this->last_vpts = 0;
+ }
+
+ /* if we join an already existing broadcaster we must take care
+ * of the initial pts.
+ */
+ if( pts && this->send_newpts ) {
+ xine_demux_control_newpts( this->stream, pts, 0 );
+ this->send_newpts = 0;
+ }
+
+ /* check if we are not late on playback.
+ * that might happen if user hits "pause" on the master, for example.
+ */
+ if( pts &&
+ (curvpts = this->stream->xine->clock->get_current_time(this->stream->xine->clock)) >
+ (this->last_vpts + CHECK_VPTS_INTERVAL) ) {
+ if( this->last_vpts &&
+ pts - (NETWORK_PREBUFFER/2) +
+ this->stream->metronom->get_option(this->stream->metronom, METRONOM_VPTS_OFFSET) <
+ curvpts ) {
+ if (this->stream->xine->verbosity >= XINE_VERBOSITY_LOG)
+ printf("demux_slave: we are running late, forcing newpts.\n");
+ xine_demux_control_newpts( this->stream, pts - NETWORK_PREBUFFER, 0 );
+ }
+ this->last_vpts = curvpts;
+ }
+
+
+ if( !strcmp(fifo_name,"video") || !this->audio_fifo )
+ buf = this->video_fifo->buffer_pool_alloc(this->video_fifo);
+ else
+ buf = this->audio_fifo->buffer_pool_alloc(this->audio_fifo);
+
+ /* copy data to buf, either from stratch or network */
+ n = this->scratch_used - (p-this->scratch);
+ if( n > size )
+ n = size;
+ if( n )
+ memcpy(buf->content, p, n);
+ if( n < size )
+ this->input->read(this->input, &buf->content[n], size-n);
+
+ p += n;
+ n = this->scratch_used - (p-this->scratch);
+ if( n )
+ memmove(this->scratch, p, n);
+ this->scratch_used = n;
+
+ /* populate our buf */
+ buf->size = size;
+ buf->type = type;
+ buf->pts = pts;
+ buf->disc_off = disc_off;
+ buf->decoder_flags = decoder_flags;
+
+ /* set decoder info */
+ for( i = 0; i < BUF_NUM_DEC_INFO; i++ ) {
+ buf->decoder_info[i] = this->decoder_info[i];
+ buf->decoder_info_ptr[i] = this->decoder_info_ptr[i];
+ }
+ memset(this->decoder_info, 0, sizeof(this->decoder_info));
+ memset(this->decoder_info_ptr, 0, sizeof(this->decoder_info_ptr));
+
+ if( !strcmp(fifo_name,"video") )
+ this->video_fifo->put(this->video_fifo, buf);
+ else if (this->audio_fifo)
+ this->audio_fifo->put(this->audio_fifo, buf);
+ else
+ buf->free_buffer(buf);
+
+ } else if( !strcmp(this->scratch,"decoder_info") ) {
+
+ uint32_t decoder_info;
+ int has_data;
+ int size;
+
+ if( sscanf(s,"index=%d decoder_info=%u has_data=%d",
+ &i, &decoder_info, &has_data) != 3 ||
+ i < 0 || i > BUF_NUM_DEC_INFO) {
+ printf("demux_slave: 'decoder_info' command error\n");
+ this->status = DEMUX_FINISHED;
+ return 0;
+ }
+
+ this->decoder_info[i] = decoder_info;
+
+ size = (has_data) ? decoder_info : 0;
+
+ if( size ) {
+ this->decoder_info_ptr[i] = malloc(size);
+ xine_list_append_content(this->dec_infos, this->decoder_info_ptr[i]);
+ }
+
+ n = this->scratch_used - (p-this->scratch);
+ if( n > size )
+ n = size;
+ if( n )
+ memcpy(this->decoder_info_ptr[i], p, n);
+ if( n < size )
+ this->input->read(this->input, (char *)this->decoder_info_ptr[i]+n, size-n);
+
+ p += n;
+ n = this->scratch_used - (p-this->scratch);
+ if( n )
+ memmove(this->scratch, p, n);
+ this->scratch_used = n;
+
+
+ } else if( !strcmp(this->scratch,"flush_engine") ) {
+
+ xine_demux_flush_engine( this->stream );
+ n = this->scratch_used - (p-this->scratch);
+ if( n )
+ memmove(this->scratch, p, n);
+ this->scratch_used = n;
+
+ } else {
+ printf("demux_slave: unknown command '%s'\n", this->scratch);
+ n = this->scratch_used - (p-this->scratch);
+ if( n )
+ memmove(this->scratch, p, n);
+ this->scratch_used = n;
+ }
+
+ return 1;
+}
+
+static int demux_slave_send_chunk (demux_plugin_t *this_gen) {
+
+ demux_slave_t *this = (demux_slave_t *) this_gen;
+
+ demux_slave_next(this);
+
+ return this->status;
+}
+
+static int demux_slave_get_status (demux_plugin_t *this_gen) {
+ demux_slave_t *this = (demux_slave_t *) this_gen;
+
+ return this->status;
+}
+
+
+static void demux_slave_send_headers (demux_plugin_t *this_gen) {
+
+ demux_slave_t *this = (demux_slave_t *) this_gen;
+
+ this->video_fifo = this->stream->video_fifo;
+ this->audio_fifo = this->stream->audio_fifo;
+
+ xine_demux_control_start(this->stream);
+
+ this->status = DEMUX_OK;
+
+ this->stream->stream_info[XINE_STREAM_INFO_HAS_VIDEO] = 1;
+ this->stream->stream_info[XINE_STREAM_INFO_HAS_AUDIO] = 1;
+
+ this->last_vpts = 0;
+ this->send_newpts = 1;
+}
+
+static int demux_slave_seek (demux_plugin_t *this_gen,
+ off_t start_pos, int start_time) {
+
+ demux_slave_t *this = (demux_slave_t *) this_gen;
+
+ return this->status;
+}
+
+static void demux_slave_dispose (demux_plugin_t *this_gen) {
+ demux_slave_t *this = (demux_slave_t *) this_gen;
+ void *data;
+
+ /* free all decoder information */
+ data = xine_list_first_content (this->dec_infos);
+ while (data) {
+ free(data);
+ xine_list_delete_current (this->dec_infos);
+ if( this->dec_infos->cur )
+ data = this->dec_infos->cur->content;
+ else
+ data = NULL;
+ }
+ xine_list_free(this->dec_infos);
+
+ free (this);
+}
+
+static int demux_slave_get_stream_length(demux_plugin_t *this_gen) {
+ return 0 ; /*FIXME: implement */
+}
+
+static uint32_t demux_slave_get_capabilities(demux_plugin_t *this_gen) {
+ return DEMUX_CAP_NOCAP;
+}
+
+static int demux_slave_get_optional_data(demux_plugin_t *this_gen,
+ void *data, int data_type) {
+ return DEMUX_OPTIONAL_UNSUPPORTED;
+}
+
+
+static demux_plugin_t *open_plugin (demux_class_t *class_gen, xine_stream_t *stream,
+ input_plugin_t *input_gen) {
+
+ input_plugin_t *input = (input_plugin_t *) input_gen;
+ demux_slave_t *this;
+ static char slave_id_str[] = "master xine v1\n";
+ int len;
+
+ this = xine_xmalloc (sizeof (demux_slave_t));
+
+ switch (stream->content_detection_method) {
+
+ case METHOD_BY_EXTENSION: {
+ char *mrl;
+
+ mrl = input->get_mrl (input);
+
+ if(!strncmp(mrl, "slave://", 8))
+ break;
+
+ free (this);
+ return NULL;
+ }
+
+ case METHOD_BY_CONTENT: {
+
+ if ( (len = xine_demux_read_header(input, this->scratch, SCRATCH_SIZE)) > 0) {
+ if (!strncmp(this->scratch,slave_id_str,strlen(slave_id_str)))
+ break;
+ }
+
+ free (this);
+ return NULL;
+ }
+
+ case METHOD_EXPLICIT:
+ break;
+
+ default:
+ free (this);
+ return NULL;
+ }
+
+ this->stream = stream;
+ this->input = input;
+ this->dec_infos = xine_list_new();
+
+ this->demux_plugin.send_headers = demux_slave_send_headers;
+ this->demux_plugin.send_chunk = demux_slave_send_chunk;
+ this->demux_plugin.seek = demux_slave_seek;
+ this->demux_plugin.dispose = demux_slave_dispose;
+ this->demux_plugin.get_status = demux_slave_get_status;
+ this->demux_plugin.get_stream_length = demux_slave_get_stream_length;
+ this->demux_plugin.get_video_frame = NULL;
+ this->demux_plugin.got_video_frame_cb= NULL;
+ this->demux_plugin.get_capabilities = demux_slave_get_capabilities;
+ this->demux_plugin.get_optional_data = demux_slave_get_optional_data;
+ this->demux_plugin.demux_class = class_gen;
+
+ this->status = DEMUX_FINISHED;
+
+ this->input->read(this->input, this->scratch,strlen(slave_id_str));
+ this->scratch_used = 0;
+
+ memset(this->decoder_info, 0, sizeof(this->decoder_info));
+ memset(this->decoder_info_ptr, 0, sizeof(this->decoder_info_ptr));
+
+ return &this->demux_plugin;
+}
+
+static char *get_description (demux_class_t *this_gen) {
+ return "";
+}
+
+static char *get_identifier (demux_class_t *this_gen) {
+ return "slave";
+}
+
+static char *get_extensions (demux_class_t *this_gen) {
+ return "";
+}
+
+static char *get_mimetypes (demux_class_t *this_gen) {
+ return NULL;
+}
+
+static void class_dispose (demux_class_t *this_gen) {
+
+ demux_slave_class_t *this = (demux_slave_class_t *) this_gen;
+
+ free (this);
+}
+
+static void *init_plugin (xine_t *xine, void *data) {
+
+ demux_slave_class_t *this;
+
+ this = xine_xmalloc (sizeof (demux_slave_class_t));
+ this->config = xine->config;
+ this->xine = xine;
+
+ this->demux_class.open_plugin = open_plugin;
+ this->demux_class.get_description = get_description;
+ this->demux_class.get_identifier = get_identifier;
+ this->demux_class.get_mimetypes = get_mimetypes;
+ this->demux_class.get_extensions = get_extensions;
+ this->demux_class.dispose = class_dispose;
+
+ return this;
+}
+
+/*
+ * exported plugin catalog entry
+ */
+
+plugin_info_t xine_plugin_info[] = {
+ /* type, API, "name", version, special_info, init_function */
+ { PLUGIN_DEMUX, 21, "slave", XINE_VERSION_CODE, NULL, init_plugin },
+ { PLUGIN_NONE, 0, "", 0, NULL, NULL }
+};
generated by cgit v1.2.3 (git 2.25.1) at 2025-04-25 09:46:57 +0000