gstreamer/gst/elements/gstasyncdisksrc.c
Wim Taymans 5b0ba06f28 Added MMX optimized yuv2rgb (AlienSong now plays back at only 6% CPU)
Original commit message from CVS:
Added MMX optimized yuv2rgb (AlienSong now plays back at only 6% CPU)
Added mpeg1 picture skipping and fixed a buffer overflow.
Added a system clock. The audiosink can now adjust the clock.
Fixed incorrect behaviour on 8, 15, 16, 24 and 32 bits displays.
Cleanup of the videosink, it now uses the color conversion library when
needed.
2000-04-09 21:36:56 +00:00

351 lines
10 KiB
C

/* Gnome-Streamer
* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <sys/mman.h>
#include <gstasyncdisksrc.h>
GstElementDetails gst_asyncdisksrc_details = {
"Asynchronous Disk Source",
"Source/File",
"Read from arbitrary point in a file",
VERSION,
"Erik Walthinsen <omega@cse.ogi.edu>",
"(C) 1999",
};
/* AsyncDiskSrc signals and args */
enum {
/* FILL ME */
LAST_SIGNAL
};
enum {
ARG_0,
ARG_LOCATION,
ARG_BYTESPERREAD,
ARG_LENGTH,
ARG_OFFSET,
};
static void gst_asyncdisksrc_class_init(GstAsyncDiskSrcClass *klass);
static void gst_asyncdisksrc_init(GstAsyncDiskSrc *asyncdisksrc);
static void gst_asyncdisksrc_set_arg(GtkObject *object,GtkArg *arg,guint id);
static void gst_asyncdisksrc_get_arg(GtkObject *object,GtkArg *arg,guint id);
static void gst_asyncdisksrc_push(GstSrc *src);
static void gst_asyncdisksrc_push_region(GstSrc *src,gulong offset,
gulong size);
static gboolean gst_asyncdisksrc_change_state(GstElement *element,
GstElementState state);
static GstSrcClass *parent_class = NULL;
//static guint gst_asyncdisksrc_signals[LAST_SIGNAL] = { 0 };
GtkType
gst_asyncdisksrc_get_type(void) {
static GtkType asyncdisksrc_type = 0;
if (!asyncdisksrc_type) {
static const GtkTypeInfo asyncdisksrc_info = {
"GstAsyncDiskSrc",
sizeof(GstAsyncDiskSrc),
sizeof(GstAsyncDiskSrcClass),
(GtkClassInitFunc)gst_asyncdisksrc_class_init,
(GtkObjectInitFunc)gst_asyncdisksrc_init,
(GtkArgSetFunc)gst_asyncdisksrc_set_arg,
(GtkArgGetFunc)gst_asyncdisksrc_get_arg,
(GtkClassInitFunc)NULL,
};
asyncdisksrc_type = gtk_type_unique(GST_TYPE_SRC,&asyncdisksrc_info);
}
return asyncdisksrc_type;
}
static void
gst_asyncdisksrc_class_init(GstAsyncDiskSrcClass *klass) {
GtkObjectClass *gtkobject_class;
GstElementClass *gstelement_class;
GstSrcClass *gstsrc_class;
gtkobject_class = (GtkObjectClass*)klass;
gstelement_class = (GstElementClass*)klass;
gstsrc_class = (GstSrcClass*)klass;
parent_class = gtk_type_class(GST_TYPE_SRC);
gtk_object_add_arg_type("GstAsyncDiskSrc::location", GTK_TYPE_STRING,
GTK_ARG_READWRITE, ARG_LOCATION);
gtk_object_add_arg_type("GstAsyncDiskSrc::bytesperread", GTK_TYPE_INT,
GTK_ARG_READWRITE, ARG_BYTESPERREAD);
gtk_object_add_arg_type("GstAsyncDiskSrc::length", GTK_TYPE_LONG,
GTK_ARG_READABLE, ARG_LENGTH);
gtk_object_add_arg_type("GstAsyncDiskSrc::offset", GTK_TYPE_LONG,
GTK_ARG_READWRITE, ARG_OFFSET);
gtkobject_class->set_arg = gst_asyncdisksrc_set_arg;
gtkobject_class->get_arg = gst_asyncdisksrc_get_arg;
gstelement_class->change_state = gst_asyncdisksrc_change_state;
gstsrc_class->push = gst_asyncdisksrc_push;
gstsrc_class->push_region = gst_asyncdisksrc_push_region;
}
static void gst_asyncdisksrc_init(GstAsyncDiskSrc *asyncdisksrc) {
GST_SRC_SET_FLAGS(asyncdisksrc,GST_SRC_ASYNC);
asyncdisksrc->srcpad = gst_pad_new("src",GST_PAD_SRC);
gst_element_add_pad(GST_ELEMENT(asyncdisksrc),asyncdisksrc->srcpad);
asyncdisksrc->filename = NULL;
asyncdisksrc->fd = 0;
asyncdisksrc->size = 0;
asyncdisksrc->map = NULL;
asyncdisksrc->curoffset = 0;
asyncdisksrc->bytes_per_read = 4096;
asyncdisksrc->seq = 0;
}
static void gst_asyncdisksrc_set_arg(GtkObject *object,GtkArg *arg,guint id) {
GstAsyncDiskSrc *src;
/* it's not null if we got it, but it might not be ours */
g_return_if_fail(GST_IS_ASYNCDISKSRC(object));
src = GST_ASYNCDISKSRC(object);
switch(id) {
case ARG_LOCATION:
/* the element must be stopped in order to do this */
g_return_if_fail(!GST_FLAG_IS_SET(src,GST_ASYNCDISKSRC_OPEN));
if (src->filename) g_free(src->filename);
/* clear the filename if we get a NULL (is that possible?) */
if (GTK_VALUE_STRING(*arg) == NULL) {
src->filename = NULL;
gst_element_set_state(GST_ELEMENT(object),~GST_STATE_COMPLETE);
/* otherwise set the new filename */
} else {
src->filename = g_strdup(GTK_VALUE_STRING(*arg));
gst_element_set_state(GST_ELEMENT(object),GST_STATE_COMPLETE);
}
break;
case ARG_BYTESPERREAD:
src->bytes_per_read = GTK_VALUE_INT(*arg);
break;
case ARG_OFFSET:
src->curoffset = GTK_VALUE_LONG(*arg);
break;
default:
break;
}
}
static void gst_asyncdisksrc_get_arg(GtkObject *object,GtkArg *arg,guint id) {
GstAsyncDiskSrc *src;
/* it's not null if we got it, but it might not be ours */
g_return_if_fail(GST_IS_ASYNCDISKSRC(object));
src = GST_ASYNCDISKSRC(object);
switch (id) {
case ARG_LOCATION:
GTK_VALUE_STRING(*arg) = src->filename;
break;
case ARG_BYTESPERREAD:
GTK_VALUE_INT(*arg) = src->bytes_per_read;
break;
case ARG_LENGTH:
GTK_VALUE_LONG(*arg) = src->size;
break;
case ARG_OFFSET:
GTK_VALUE_LONG(*arg) = src->curoffset;
break;
default:
arg->type = GTK_TYPE_INVALID;
break;
}
}
/**
* gst_asyncdisksrc_push:
* @src: #GstSrc to push a buffer from
*
* Push a new buffer from the asyncdisksrc at the current offset.
*/
void gst_asyncdisksrc_push(GstSrc *src) {
GstAsyncDiskSrc *asyncdisksrc;
GstBuffer *buf;
g_return_if_fail(src != NULL);
g_return_if_fail(GST_IS_ASYNCDISKSRC(src));
g_return_if_fail(GST_FLAG_IS_SET(src,GST_ASYNCDISKSRC_OPEN));
asyncdisksrc = GST_ASYNCDISKSRC(src);
/* deal with EOF state */
if (asyncdisksrc->curoffset >= asyncdisksrc->size) {
gst_src_signal_eos(GST_SRC(asyncdisksrc));
return;
}
/* create the buffer */
// FIXME: should eventually use a bufferpool for this
buf = gst_buffer_new();
g_return_if_fail(buf != NULL);
/* simply set the buffer to point to the correct region of the file */
GST_BUFFER_DATA(buf) = asyncdisksrc->map + asyncdisksrc->curoffset;
GST_BUFFER_OFFSET(buf) = asyncdisksrc->curoffset;
GST_BUFFER_FLAG_SET(buf, GST_BUFFER_DONTFREE);
if ((asyncdisksrc->curoffset + asyncdisksrc->bytes_per_read) >
asyncdisksrc->size) {
GST_BUFFER_SIZE(buf) = asyncdisksrc->size - asyncdisksrc->curoffset;
// FIXME: set the buffer's EOF bit here
} else
GST_BUFFER_SIZE(buf) = asyncdisksrc->bytes_per_read;
asyncdisksrc->curoffset += GST_BUFFER_SIZE(buf);
//gst_buffer_ref(buf);
/* we're done, push the buffer off now */
gst_pad_push(asyncdisksrc->srcpad,buf);
}
/**
* gst_asyncdisksrc_push_region:
* @src: #GstSrc to push a buffer from
* @offset: offset in file
* @size: number of bytes
*
* Push a new buffer from the asyncdisksrc of given size at given offset.
*/
void gst_asyncdisksrc_push_region(GstSrc *src,gulong offset,gulong size) {
GstAsyncDiskSrc *asyncdisksrc;
GstBuffer *buf;
g_return_if_fail(src != NULL);
g_return_if_fail(GST_IS_ASYNCDISKSRC(src));
g_return_if_fail(GST_FLAG_IS_SET(src,GST_STATE_RUNNING));
asyncdisksrc = GST_ASYNCDISKSRC(src);
/* deal with EOF state */
if (offset >= asyncdisksrc->size) {
gst_src_signal_eos(GST_SRC(asyncdisksrc));
return;
}
/* create the buffer */
// FIXME: should eventually use a bufferpool for this
buf = gst_buffer_new();
g_return_if_fail(buf);
/* simply set the buffer to point to the correct region of the file */
GST_BUFFER_DATA(buf) = asyncdisksrc->map + offset;
GST_BUFFER_OFFSET(buf) = asyncdisksrc->curoffset;
GST_BUFFER_FLAG_SET(buf, GST_BUFFER_DONTFREE);
if ((offset + size) > asyncdisksrc->size) {
GST_BUFFER_SIZE(buf) = asyncdisksrc->size - offset;
// FIXME: set the buffer's EOF bit here
} else
GST_BUFFER_SIZE(buf) = size;
asyncdisksrc->curoffset += GST_BUFFER_SIZE(buf);
/* we're done, push the buffer off now */
gst_pad_push(asyncdisksrc->srcpad,buf);
}
/* open the file and mmap it, necessary to go to RUNNING state */
static gboolean gst_asyncdisksrc_open_file(GstAsyncDiskSrc *src) {
g_return_val_if_fail(!GST_FLAG_IS_SET(src,GST_ASYNCDISKSRC_OPEN), FALSE);
/* open the file */
src->fd = open(src->filename,O_RDONLY);
if (src->fd < 0) {
gst_element_error(GST_ELEMENT(src),"opening file");
return FALSE;
} else {
/* find the file length */
src->size = lseek(src->fd,0,SEEK_END);
lseek(src->fd,0,SEEK_SET);
/* map the file into memory */
src->map = mmap(NULL,src->size,PROT_READ,MAP_SHARED,src->fd,0);
madvise(src->map,src->size,2);
/* collapse state if that failed */
if (src->map == NULL) {
close(src->fd);
gst_element_error(GST_ELEMENT(src),"mmapping file");
return FALSE;
}
GST_FLAG_SET(src,GST_ASYNCDISKSRC_OPEN);
}
return TRUE;
}
/* unmap and close the file */
static void gst_asyncdisksrc_close_file(GstAsyncDiskSrc *src) {
g_return_if_fail(GST_FLAG_IS_SET(src,GST_ASYNCDISKSRC_OPEN));
/* unmap the file from memory */
munmap(src->map,src->size);
/* close the file */
close(src->fd);
/* zero out a lot of our state */
src->fd = 0;
src->size = 0;
src->map = NULL;
src->curoffset = 0;
src->seq = 0;
GST_FLAG_UNSET(src,GST_ASYNCDISKSRC_OPEN);
}
static gboolean gst_asyncdisksrc_change_state(GstElement *element,
GstElementState state) {
g_return_val_if_fail(GST_IS_ASYNCDISKSRC(element), FALSE);
switch (state) {
case GST_STATE_RUNNING:
if (!gst_asyncdisksrc_open_file(GST_ASYNCDISKSRC(element)))
return FALSE;
break;
case ~GST_STATE_RUNNING:
gst_asyncdisksrc_close_file(GST_ASYNCDISKSRC(element));
break;
default:
break;
}
if (GST_ELEMENT_CLASS(parent_class)->change_state)
return GST_ELEMENT_CLASS(parent_class)->change_state(element,state);
return TRUE;
}