gstreamer/ext/ffmpeg/gstffmpegdemux.c

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/* 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>
#ifdef HAVE_FFMPEG_UNINSTALLED
#include <avformat.h>
#include <avi.h>
#else
#include <ffmpeg/avformat.h>
#include <ffmpeg/avi.h>
#endif
#include <gst/gst.h>
#include "gstffmpegcodecmap.h"
typedef struct _GstFFMpegDemux GstFFMpegDemux;
struct _GstFFMpegDemux {
GstElement element;
/* We need to keep track of our pads, so we do so here. */
GstPad *sinkpad;
AVFormatContext *context;
gboolean opened;
GstPad *srcpads[MAX_STREAMS];
gint videopads, audiopads;
};
typedef struct _GstFFMpegDemuxClassParams {
AVInputFormat *in_plugin;
GstPadTemplate *sinktempl;
GstPadTemplate *videosrctempl;
GstPadTemplate *audiosrctempl;
GstPluginFeature *typefind_feature;
} GstFFMpegDemuxClassParams;
typedef struct _GstFFMpegDemuxClass GstFFMpegDemuxClass;
struct _GstFFMpegDemuxClass {
GstElementClass parent_class;
AVInputFormat *in_plugin;
GstPadTemplate *sinktempl;
GstPadTemplate *videosrctempl;
GstPadTemplate *audiosrctempl;
GstPluginFeature *typefind_feature;
};
#define GST_TYPE_FFMPEGDEC \
(gst_ffmpegdec_get_type())
#define GST_FFMPEGDEC(obj) \
(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_FFMPEGDEC,GstFFMpegDemux))
#define GST_FFMPEGDEC_CLASS(klass) \
(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_FFMPEGDEC,GstFFMpegDemuxClass))
#define GST_IS_FFMPEGDEC(obj) \
(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_FFMPEGDEC))
#define GST_IS_FFMPEGDEC_CLASS(obj) \
(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_FFMPEGDEC))
enum {
/* FILL ME */
LAST_SIGNAL
};
enum {
ARG_0,
/* FILL ME */
};
static GHashTable *global_plugins, *typefind;
/* A number of functon prototypes are given so we can refer to them later. */
static void gst_ffmpegdemux_class_init (GstFFMpegDemuxClass *klass);
static void gst_ffmpegdemux_init (GstFFMpegDemux *ffmpegdemux);
static void gst_ffmpegdemux_dispose (GObject *object);
static void gst_ffmpegdemux_loop (GstElement *element);
static GstElementStateReturn
gst_ffmpegdemux_change_state (GstElement *element);
static GstElementClass *parent_class = NULL;
/*static guint gst_ffmpegdemux_signals[LAST_SIGNAL] = { 0 }; */
static void
gst_ffmpegdemux_class_init (GstFFMpegDemuxClass *klass)
{
GObjectClass *gobject_class;
GstElementClass *gstelement_class;
GstFFMpegDemuxClassParams *params;
gobject_class = (GObjectClass*)klass;
gstelement_class = (GstElementClass*)klass;
parent_class = g_type_class_ref(GST_TYPE_ELEMENT);
params = g_hash_table_lookup (global_plugins,
GINT_TO_POINTER (G_OBJECT_CLASS_TYPE (gobject_class)));
klass->in_plugin = params->in_plugin;
klass->typefind_feature = params->typefind_feature;
klass->videosrctempl = params->videosrctempl;
klass->audiosrctempl = params->audiosrctempl;
klass->sinktempl = params->sinktempl;
gstelement_class->change_state = gst_ffmpegdemux_change_state;
gobject_class->dispose = gst_ffmpegdemux_dispose;
}
static void
gst_ffmpegdemux_init(GstFFMpegDemux *ffmpegdemux)
{
GstFFMpegDemuxClass *oclass = (GstFFMpegDemuxClass*)(G_OBJECT_GET_CLASS (ffmpegdemux));
ffmpegdemux->sinkpad = gst_pad_new_from_template (oclass->sinktempl,
"sink");
gst_element_add_pad (GST_ELEMENT (ffmpegdemux),
ffmpegdemux->sinkpad);
gst_element_set_loop_function (GST_ELEMENT (ffmpegdemux),
gst_ffmpegdemux_loop);
ffmpegdemux->opened = FALSE;
ffmpegdemux->videopads = 0;
ffmpegdemux->audiopads = 0;
}
static void
gst_ffmpegdemux_dispose (GObject *object)
{
GstFFMpegDemux *ffmpegdemux = (GstFFMpegDemux *) object;
if (ffmpegdemux->opened) {
av_close_input_file (ffmpegdemux->context);
ffmpegdemux->opened = FALSE;
}
}
static GstCaps*
gst_ffmpegdemux_typefind (GstBuffer *buffer,
gpointer priv)
{
GstFFMpegDemuxClassParams *params;
AVInputFormat *in_plugin;
gint res = 0;
gint required = AVPROBE_SCORE_MAX * 0.8; /* 80% certainty enough? */
params = g_hash_table_lookup (typefind, priv);
in_plugin = params->in_plugin;
if (in_plugin->read_probe) {
AVProbeData probe_data;
probe_data.filename = "";
probe_data.buf = GST_BUFFER_DATA (buffer);
probe_data.buf_size = GST_BUFFER_SIZE (buffer);
res = in_plugin->read_probe (&probe_data);
if (res >= required) {
GstCaps *caps;
caps = GST_PAD_TEMPLATE_CAPS (params->sinktempl);
/* make sure we still hold a refcount to this caps */
gst_caps_ref (caps);
return caps;
}
}
return NULL;
}
static void
gst_ffmpegdemux_loop (GstElement *element)
{
GstFFMpegDemux *ffmpegdemux = (GstFFMpegDemux *)(element);
GstFFMpegDemuxClass *oclass = (GstFFMpegDemuxClass*)(G_OBJECT_GET_CLASS (ffmpegdemux));
gint res;
AVPacket pkt;
AVFormatContext *ct;
AVStream *st;
GstPad *pad;
/* open file if we didn't so already */
if (!ffmpegdemux->opened) {
res = av_open_input_file (&ffmpegdemux->context,
g_strdup_printf ("gstreamer://%p",
ffmpegdemux->sinkpad),
oclass->in_plugin, 0, NULL);
if (res < 0) {
gst_element_error (GST_ELEMENT (ffmpegdemux),
"Failed to open demuxer/file context");
return;
}
ffmpegdemux->opened = TRUE;
}
/* shortcut to context */
ct = ffmpegdemux->context;
/* read a package */
res = av_read_packet (ct, &pkt);
if (res < 0) {
if (url_feof (&ct->pb)) {
int i;
/* we're at the end of file - send an EOS to
* each stream that we opened so far */
for (i = 0; i < ct->nb_streams; i++) {
GstPad *pad;
GstEvent *event = gst_event_new (GST_EVENT_EOS);
pad = ffmpegdemux->srcpads[i];
if (GST_PAD_IS_USABLE (pad)) {
gst_data_ref (GST_DATA (event));
gst_pad_push (pad, GST_BUFFER (event));
}
gst_data_unref (GST_DATA (event));
}
gst_element_set_eos (element);
/* FIXME: should we go into
* should we close the context here?
* either way, a new media stream needs an
* event too */
}
return;
}
/* shortcut to stream */
st = ct->streams[pkt.stream_index];
/* create the pad/stream if we didn't do so already */
if (st->codec_info_state == 0) {
GstPadTemplate *templ = NULL;
GstCaps *caps;
gchar *padname;
gint num;
/* mark as handled */
st->codec_info_state = 1;
/* find template */
switch (st->codec.codec_type) {
case CODEC_TYPE_VIDEO:
templ = oclass->videosrctempl;
num = ffmpegdemux->videopads++;
break;
case CODEC_TYPE_AUDIO:
templ = oclass->audiosrctempl;
num = ffmpegdemux->audiopads++;
break;
default:
g_warning ("Unknown pad type %d",
st->codec.codec_type);
return;
}
/* create new pad for this stream */
padname = g_strdup_printf (GST_PAD_TEMPLATE_NAME_TEMPLATE(templ),
num);
pad = gst_pad_new_from_template (templ, padname);
g_free (padname);
/* FIXME: convert() and query() functions for pad */
/* store pad internally */
ffmpegdemux->srcpads[pkt.stream_index] = pad;
gst_element_add_pad (GST_ELEMENT (ffmpegdemux), pad);
/* get caps that belongs to this stream */
caps = gst_ffmpeg_codecid_to_caps (st->codec.codec_id,
&st->codec);
if (gst_pad_try_set_caps (pad, caps) <= 0) {
GST_DEBUG (GST_CAT_PLUGIN_ERRORS,
"Failed to set caps from ffdemuxer on next element");
/* we continue here, in the next pad-is-usable check,
* we'll return nonetheless */
}
}
/* shortcut to pad belonging to this stream */
pad = ffmpegdemux->srcpads[pkt.stream_index];
/* and handle the data by pushing it forward... */
if (GST_PAD_IS_USABLE (pad)) {
GstBuffer *outbuf;
outbuf = gst_buffer_new_and_alloc (pkt.size);
memcpy (GST_BUFFER_DATA (outbuf), pkt.data, pkt.size);
GST_BUFFER_SIZE (outbuf) = pkt.size;
if (pkt.pts != AV_NOPTS_VALUE && ct->pts_den) {
GST_BUFFER_TIMESTAMP (outbuf) = pkt.pts * GST_SECOND *
ct->pts_num / ct->pts_den;
}
if (pkt.flags & PKT_FLAG_KEY) {
GST_BUFFER_FLAG_SET (outbuf, GST_BUFFER_KEY_UNIT);
}
gst_pad_push (pad, outbuf);
pkt.destruct (&pkt);
}
}
static GstElementStateReturn
gst_ffmpegdemux_change_state (GstElement *element)
{
GstFFMpegDemux *ffmpegdemux = (GstFFMpegDemux *)(element);
gint transition = GST_STATE_TRANSITION (element);
switch (transition) {
case GST_STATE_PAUSED_TO_READY:
if (ffmpegdemux->opened) {
av_close_input_file (ffmpegdemux->context);
ffmpegdemux->opened = FALSE;
}
break;
}
if (GST_ELEMENT_CLASS (parent_class)->change_state)
return GST_ELEMENT_CLASS (parent_class)->change_state (element);
return GST_STATE_SUCCESS;
}
gboolean
gst_ffmpegdemux_register (GstPlugin *plugin)
{
GstElementFactory *factory;
GstTypeFactory *type_factory;
GstTypeDefinition *type_definition;
GTypeInfo typeinfo = {
sizeof(GstFFMpegDemuxClass),
NULL,
NULL,
(GClassInitFunc)gst_ffmpegdemux_class_init,
NULL,
NULL,
sizeof(GstFFMpegDemux),
0,
(GInstanceInitFunc)gst_ffmpegdemux_init,
};
GType type;
GstElementDetails *details;
AVInputFormat *in_plugin;
GstFFMpegDemuxClassParams *params;
AVCodec *in_codec;
in_plugin = first_iformat;
global_plugins = g_hash_table_new (NULL, NULL);
typefind = g_hash_table_new (NULL, NULL);
while (in_plugin) {
gchar *type_name;
gchar *p;
GstCaps *sinkcaps, *audiosrccaps, *videosrccaps;
/* Try to find the caps that belongs here */
sinkcaps = gst_ffmpeg_formatid_to_caps (in_plugin->name);
if (!sinkcaps) {
goto next;
}
/* This is a bit ugly, but we just take all formats
* for the pad template. We'll get an exact match
* when we open the stream */
audiosrccaps = NULL;
videosrccaps = NULL;
for (in_codec = first_avcodec; in_codec != NULL;
in_codec = in_codec->next) {
GstCaps *temp = gst_ffmpeg_codecid_to_caps (in_codec->id, NULL);
if (!temp) {
continue;
}
switch (in_codec->type) {
case CODEC_TYPE_VIDEO:
videosrccaps = gst_caps_append (videosrccaps, temp);
break;
case CODEC_TYPE_AUDIO:
audiosrccaps = gst_caps_append (audiosrccaps, temp);
break;
default:
gst_caps_unref (temp);
break;
}
}
/* construct the type */
type_name = g_strdup_printf("ffdemux_%s", in_plugin->name);
p = type_name;
while (*p) {
if (*p == '.') *p = '_';
p++;
}
/* if it's already registered, drop it */
if (g_type_from_name(type_name)) {
g_free(type_name);
goto next;
}
/* create the type now */
type = g_type_register_static(GST_TYPE_ELEMENT, type_name , &typeinfo, 0);
/* construct the element details struct */
details = g_new0 (GstElementDetails, 1);
details->longname = g_strdup (in_plugin->long_name);
details->klass = g_strdup ("Codec/Demuxer");
details->license = g_strdup ("LGPL");
details->description = g_strdup_printf ("FFMPEG %s demuxer",
in_plugin->name);
details->version = g_strdup (VERSION);
details->author = g_strdup ("The FFMPEG crew\n"
"Wim Taymans <wim.taymans@chello.be>\n"
"Ronald Bultje <rbultje@ronald.bitfreak.net>");
details->copyright = g_strdup ("(c) 2002-2003");
/* register the plugin with gstreamer */
factory = gst_element_factory_new(type_name,type,details);
g_return_val_if_fail(factory != NULL, FALSE);
/* typefind info */
type_definition = g_new0 (GstTypeDefinition, 1);
type_definition->name = g_strdup_printf ("fftype_%s",
in_plugin->name);
type_definition->mime = g_strdup (gst_caps_get_mime (sinkcaps));
type_definition->exts = g_strdup (in_plugin->extensions);
type_definition->typefindfunc = gst_ffmpegdemux_typefind;
type_factory = gst_type_factory_new (type_definition);
/* create a cache for these properties */
params = g_new0 (GstFFMpegDemuxClassParams, 1);
params->in_plugin = in_plugin;
params->typefind_feature = GST_PLUGIN_FEATURE (type_factory);
params->sinktempl = gst_pad_template_new ("sink", GST_PAD_SINK,
GST_PAD_ALWAYS,
sinkcaps, NULL);
gst_element_factory_add_pad_template (factory,
params->sinktempl);
params->audiosrctempl = gst_pad_template_new ("audio_%02d",
GST_PAD_SRC,
GST_PAD_SOMETIMES,
audiosrccaps, NULL);
gst_element_factory_add_pad_template (factory,
params->audiosrctempl);
params->videosrctempl = gst_pad_template_new ("video_%02d",
GST_PAD_SRC,
GST_PAD_SOMETIMES,
videosrccaps, NULL);
gst_element_factory_add_pad_template (factory,
params->videosrctempl);
g_hash_table_insert (global_plugins,
GINT_TO_POINTER (type),
(gpointer) params);
g_hash_table_insert (typefind,
(gpointer) type_factory,
(gpointer) params);
gst_element_factory_set_rank (factory, GST_ELEMENT_RANK_MARGINAL);
/* The very last thing is to register the elementfactory with the plugin. */
gst_plugin_add_feature (plugin, GST_PLUGIN_FEATURE (factory));
gst_plugin_add_feature (plugin, GST_PLUGIN_FEATURE (type_factory));
next:
in_plugin = in_plugin->next;
}
return TRUE;
}