gstreamer/ext/ffmpeg/gstffmpegprotocol.c
Ronald S. Bultje 7b63c14e2b HACKING: Add some basic documentation on how our wrapping works.
Original commit message from CVS:
* HACKING:
Add some basic documentation on how our wrapping works.
* TODO:
Add a list of things that could be worked on or that need doing.
* configure.ac:
Update snapshot.
* ext/ffmpeg/Makefile.am:
Changne .la links. See below (autotools patch).
* ext/ffmpeg/gstffmpeg.c: (plugin_init):
Enable demuxers. See below (gstffmpegdemux.c).
* ext/ffmpeg/gstffmpegcodecmap.c: (gst_ffmpeg_formatid_to_caps):
Realmedia caused a crash - fix that.
* ext/ffmpeg/gstffmpegdemux.c: (gst_ffmpegdemux_averror),
(gst_ffmpegdemux_base_init), (gst_ffmpegdemux_init),
(gst_ffmpegdemux_close), (gst_ffmpegdemux_dispose),
(gst_ffmpegdemux_stream_from_pad),
(gst_ffmpegdemux_src_event_mask), (gst_ffmpegdemux_src_event),
(gst_ffmpegdemux_src_format_list),
(gst_ffmpegdemux_src_query_list), (gst_ffmpegdemux_src_query),
(gst_ffmpegdemux_src_convert), (gst_ffmpegdemux_add),
(gst_ffmpegdemux_open), (gst_ffmpegdemux_loop),
(gst_ffmpegdemux_change_state), (gst_ffmpegdemux_register):
Right. OK, so I fixed up the demuxing and have it basically-working,
and the best way to get some more people to test it is to actually
enable it. I'm not sure if we want this for 0.8.0, but we can at
least give it a try. I've tested avi, matroska and mpeg, all appear
to work. The cool thing is that this gives us instant support for
several exotic formats that we'd never care about ourselves. Again,
this needs more testing for it to still be enabled in 0.8.0, but I
want to give it a try...
* ext/ffmpeg/gstffmpegmux.c: (gst_ffmpegmux_base_init),
(gst_ffmpegmux_init), (gst_ffmpegmux_request_new_pad),
(gst_ffmpegmux_connect), (gst_ffmpegmux_loop),
(gst_ffmpegmux_register):
Add some fixups that I use locally. Make it work in the case of
MPEG encoding, but the muxer is still not in shape to be enabled.
* ext/ffmpeg/gstffmpegprotocol.c: (gst_ffmpegdata_open),
(gst_ffmpegdata_read), (gst_ffmpegdata_write),
(gst_ffmpegdata_seek), (gst_ffmpegdata_close):
Some small fixups that crept into it while it was disabled for the
last few years. Basically works.
* gst-libs/ext/ffmpeg/Makefile.am:
Instead of having our local-autotoolized version, I patch the ffmpeg
source to be fully autotoolized. That means a simple SUBDIRS here
is now enough.
* gst-libs/ext/ffmpeg/Tag:
Version update.
* gst-libs/ext/ffmpeg/patch/autotools.diff:
Autotoolize ffmpeg. Needs to be sent to ffmpeg-devel@...
* gst-libs/ext/ffmpeg/patch/disableinstalllibs.diff:
Don't install their libs.
* gst-libs/ext/ffmpeg/patch/disablemmx.diff:
Don't use MMX. It cannot ocmpile using PIC.
* gst-libs/ext/ffmpeg/patch/disabletools.diff:
Don't compile/install their tools, we don't use them.
* gst-libs/ext/ffmpeg/patch/functions.diff:
Prevent symbol conflicts.
* gst-libs/ext/ffmpeg/patch/matroska.diff:
Add a matroska demuxer. Needs to be sent to ffmpeg-devel@...
2004-03-01 04:59:17 +00:00

253 lines
5.6 KiB
C

/* GStreamer
* 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.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <string.h>
#include <errno.h>
#ifdef HAVE_FFMPEG_UNINSTALLED
#include <avformat.h>
#else
#include <ffmpeg/avformat.h>
#endif
#include <gst/gst.h>
#include <gst/bytestream/bytestream.h>
typedef struct _GstProtocolInfo GstProtocolInfo;
struct _GstProtocolInfo {
GstPad *pad;
int flags;
GstByteStream *bs;
gboolean eos;
};
static int
gst_ffmpegdata_open (URLContext *h,
const char *filename,
int flags)
{
GstProtocolInfo *info;
GstPad *pad;
info = g_new0 (GstProtocolInfo, 1);
info->flags = flags;
/* we don't support R/W together */
if (flags != URL_RDONLY &&
flags != URL_WRONLY) {
g_warning ("Only read-only or write-only are supported");
return -EINVAL;
}
if (sscanf (&filename[12], "%p", &pad) != 1) {
g_warning ("could not decode pad from %s", filename);
return -EIO;
}
/* make sure we're a pad and that we're of the right type */
g_return_val_if_fail (GST_IS_PAD (pad), -EINVAL);
switch (flags) {
case URL_RDONLY:
g_return_val_if_fail (GST_PAD_IS_SINK (pad), -EINVAL);
info->bs = gst_bytestream_new (pad);
break;
case URL_WRONLY:
g_return_val_if_fail (GST_PAD_IS_SRC (pad), -EINVAL);
info->bs = NULL;
break;
}
info->eos = FALSE;
info->pad = pad;
h->priv_data = (void *) info;
return 0;
}
static int
gst_ffmpegdata_read (URLContext *h,
unsigned char *buf,
int size)
{
GstByteStream *bs;
guint32 total, request;
guint8 *data;
GstProtocolInfo *info;
info = (GstProtocolInfo *) h->priv_data;
g_return_val_if_fail (info->flags == URL_RDONLY, -EIO);
bs = info->bs;
if (info->eos)
return 0;
do {
/* prevent EOS */
if (gst_bytestream_tell (bs) + size > gst_bytestream_length (bs))
request = gst_bytestream_length (bs) - gst_bytestream_tell (bs);
else
request = size;
if (request)
total = gst_bytestream_peek_bytes (bs, &data, request);
else
total = 0;
if (total < request) {
GstEvent *event;
guint32 remaining;
gst_bytestream_get_status (bs, &remaining, &event);
if (!event) {
g_warning ("gstffmpegprotocol: no bytestream event");
return total;
}
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_DISCONTINUOUS:
gst_bytestream_flush_fast (bs, remaining);
gst_event_unref (event);
break;
case GST_EVENT_EOS:
info->eos = TRUE;
gst_event_unref (event);
break;
default:
gst_pad_event_default (info->pad, event);
break;
}
}
} while (!info->eos && total != request);
memcpy (buf, data, total);
gst_bytestream_flush (bs, total);
return total;
}
static int
gst_ffmpegdata_write (URLContext *h,
unsigned char *buf,
int size)
{
GstProtocolInfo *info;
GstBuffer *outbuf;
info = (GstProtocolInfo *) h->priv_data;
g_return_val_if_fail (info->flags == URL_WRONLY, -EIO);
/* create buffer and push data further */
outbuf = gst_buffer_new_and_alloc (size);
GST_BUFFER_SIZE (outbuf) = size;
memcpy (GST_BUFFER_DATA (outbuf), buf, size);
gst_pad_push (info->pad, GST_DATA (outbuf));
return 0;
}
static offset_t
gst_ffmpegdata_seek (URLContext *h,
offset_t pos,
int whence)
{
GstSeekType seek_type = 0;
GstProtocolInfo *info;
info = (GstProtocolInfo *) h->priv_data;
switch (whence) {
case SEEK_SET:
seek_type = GST_SEEK_METHOD_SET;
break;
case SEEK_CUR:
seek_type = GST_SEEK_METHOD_CUR;
break;
case SEEK_END:
seek_type = GST_SEEK_METHOD_END;
break;
default:
g_assert (0);
break;
}
switch (info->flags) {
case URL_RDONLY:
gst_bytestream_seek (info->bs, pos, seek_type);
break;
case URL_WRONLY:
gst_pad_push (info->pad, GST_DATA (gst_event_new_seek (seek_type, pos)));
break;
default:
g_assert (0);
break;
}
return 0;
}
static int
gst_ffmpegdata_close (URLContext *h)
{
GstProtocolInfo *info;
info = (GstProtocolInfo *) h->priv_data;
switch (info->flags) {
case URL_WRONLY: {
/* send EOS - that closes down the stream */
GstEvent *event = gst_event_new (GST_EVENT_EOS);
gst_pad_push (info->pad, GST_DATA (event));
}
break;
case URL_RDONLY:
/* unref bytestream */
gst_bytestream_destroy (info->bs);
break;
}
/* clean up data */
g_free (info);
return 0;
}
URLProtocol gstreamer_protocol = {
.name = "gstreamer",
.url_open = gst_ffmpegdata_open,
.url_read = gst_ffmpegdata_read,
.url_write = gst_ffmpegdata_write,
.url_seek = gst_ffmpegdata_seek,
.url_close = gst_ffmpegdata_close,
};