gstreamer/gst/avi/gstavimux.c

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/* AVI muxer plugin for GStreamer
* Copyright (C) 2002 Ronald Bultje <rbultje@ronald.bitfreak.net>
*
* 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.
*/
/* based on:
* - the old avimuxer (by Wim Taymans)
* - xawtv's aviwriter (by Gerd Knorr)
* - mjpegtools' avilib (by Rainer Johanni)
* - openDML large-AVI docs
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "gst/gst-i18n-plugin.h"
#include <stdlib.h>
#include <string.h>
#include <gst/video/video.h>
#include "gstavimux.h"
#ifndef LE_FROM_GUINT16
#define LE_FROM_GUINT16 GUINT16_FROM_LE
#endif
#ifndef LE_FROM_GUINT32
#define LE_FROM_GUINT32 GUINT32_FROM_LE
#endif
/* AviMux signals and args */
enum
{
/* FILL ME */
LAST_SIGNAL
};
enum
{
ARG_0,
ARG_BIGFILE
};
static GstStaticPadTemplate src_factory = GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("video/x-msvideo")
);
static GstStaticPadTemplate video_sink_factory =
GST_STATIC_PAD_TEMPLATE ("video_%d",
GST_PAD_SINK,
GST_PAD_REQUEST,
GST_STATIC_CAPS ("video/x-raw-yuv, "
"format = (fourcc) { YUY2, I420 }, "
"width = (int) [ 16, 4096 ], "
"height = (int) [ 16, 4096 ], "
"framerate = (double) [ 0, MAX ]; "
"image/jpeg, "
"width = (int) [ 16, 4096 ], "
"height = (int) [ 16, 4096 ], "
"framerate = (double) [ 0, MAX ]; "
"video/x-divx, "
"width = (int) [ 16, 4096 ], "
"height = (int) [ 16, 4096 ], "
"framerate = (double) [ 0, MAX ], "
"divxversion = (int) [ 3, 5 ]; "
"video/x-xvid, "
"width = (int) [ 16, 4096 ], "
"height = (int) [ 16, 4096 ], "
"framerate = (double) [ 0, MAX ]; "
"video/x-3ivx, "
"width = (int) [ 16, 4096 ], "
"height = (int) [ 16, 4096 ], "
"framerate = (double) [ 0, MAX ]; "
"video/x-msmpeg, "
"width = (int) [ 16, 4096 ], "
"height = (int) [ 16, 4096 ], "
"framerate = (double) [ 0, MAX ], "
"msmpegversion = (int) [ 41, 43 ]; "
"video/mpeg, "
"width = (int) [ 16, 4096 ], "
"height = (int) [ 16, 4096 ], "
"framerate = (double) [ 0, MAX ], "
"mpegversion = (int) 1, "
"systemstream = (boolean) FALSE; "
"video/x-h263, "
"width = (int) [ 16, 4096 ], "
"height = (int) [ 16, 4096 ], "
"framerate = (double) [ 0, MAX ]; "
"video/x-h264, "
"width = (int) [ 16, 4096 ], "
"height = (int) [ 16, 4096 ], "
"framerate = (double) [ 0, MAX ]; "
"video/x-dv, "
"width = (int) 720, "
"height = (int) { 576, 480 }, "
"framerate = (double) [ 0, MAX ], "
"systemstream = (boolean) FALSE; "
"video/x-huffyuv, "
"width = (int) [ 16, 4096 ], "
"height = (int) [ 16, 4096 ], " "framerate = (double) [ 0, MAX ]")
);
static GstStaticPadTemplate audio_sink_factory =
GST_STATIC_PAD_TEMPLATE ("audio_%d",
GST_PAD_SINK,
GST_PAD_REQUEST,
GST_STATIC_CAPS ("audio/x-raw-int, "
"endianness = (int) LITTLE_ENDIAN, "
"signed = (boolean) { TRUE, FALSE }, "
"width = (int) { 8, 16 }, "
"depth = (int) { 8, 16 }, "
"rate = (int) [ 1000, 96000 ], "
"channels = (int) [ 1, 2 ]; "
"audio/mpeg, "
"mpegversion = (int) 1, "
"layer = (int) [ 1, 3 ], "
"rate = (int) [ 1000, 96000 ], "
"channels = (int) [ 1, 2 ]; "
"audio/x-vorbis, "
"rate = (int) [ 1000, 96000 ], "
"channels = (int) [ 1, 2 ]; "
"audio/x-ac3, "
"rate = (int) [ 1000, 96000 ], " "channels = (int) [ 1, 2 ]")
);
static void gst_avimux_base_init (gpointer g_class);
static void gst_avimux_class_init (GstAviMuxClass * klass);
static void gst_avimux_init (GstAviMux * avimux);
static void gst_avimux_loop (GstElement * element);
static gboolean gst_avimux_handle_event (GstPad * pad, GstEvent * event);
static GstPad *gst_avimux_request_new_pad (GstElement * element,
GstPadTemplate * templ, const gchar * name);
static void gst_avimux_release_pad (GstElement * element, GstPad * pad);
static void gst_avimux_set_property (GObject * object,
guint prop_id, const GValue * value, GParamSpec * pspec);
static void gst_avimux_get_property (GObject * object,
guint prop_id, GValue * value, GParamSpec * pspec);
static GstStateChangeReturn gst_avimux_change_state (GstElement * element,
GstStateChange transition);
static GstElementClass *parent_class = NULL;
/*static guint gst_avimux_signals[LAST_SIGNAL] = { 0 }; */
GType
gst_avimux_get_type (void)
{
static GType avimux_type = 0;
if (!avimux_type) {
static const GTypeInfo avimux_info = {
sizeof (GstAviMuxClass),
gst_avimux_base_init,
NULL,
(GClassInitFunc) gst_avimux_class_init,
NULL,
NULL,
sizeof (GstAviMux),
0,
(GInstanceInitFunc) gst_avimux_init,
};
static const GInterfaceInfo tag_setter_info = {
NULL,
NULL,
NULL
};
avimux_type =
g_type_register_static (GST_TYPE_ELEMENT, "GstAviMux", &avimux_info, 0);
g_type_add_interface_static (avimux_type, GST_TYPE_TAG_SETTER,
&tag_setter_info);
}
return avimux_type;
}
static void
gst_avimux_base_init (gpointer g_class)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
static GstElementDetails gst_avimux_details =
GST_ELEMENT_DETAILS ("Avi multiplexer",
"Codec/Muxer",
"Muxes audio and video into an avi stream",
"Ronald Bultje <rbultje@ronald.bitfreak.net>");
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&src_factory));
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&audio_sink_factory));
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&video_sink_factory));
gst_element_class_set_details (element_class, &gst_avimux_details);
}
static void
gst_avimux_class_init (GstAviMuxClass * klass)
{
GObjectClass *gobject_class;
GstElementClass *gstelement_class;
gobject_class = (GObjectClass *) klass;
gstelement_class = (GstElementClass *) klass;
parent_class = g_type_class_ref (GST_TYPE_ELEMENT);
g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_BIGFILE,
g_param_spec_boolean ("bigfile", "Bigfile Support",
"Support for openDML-2.0 (big) AVI files", 0, G_PARAM_READWRITE));
gstelement_class->request_new_pad = gst_avimux_request_new_pad;
gstelement_class->release_pad = gst_avimux_release_pad;
gstelement_class->change_state = gst_avimux_change_state;
gstelement_class->get_property = gst_avimux_get_property;
gstelement_class->set_property = gst_avimux_set_property;
}
static const GstEventMask *
gst_avimux_get_event_masks (GstPad * pad)
{
static const GstEventMask gst_avimux_sink_event_masks[] = {
{GST_EVENT_EOS, 0},
{0,}
};
return gst_avimux_sink_event_masks;
}
static void
gst_avimux_init (GstAviMux * avimux)
{
GstElementClass *klass = GST_ELEMENT_GET_CLASS (avimux);
avimux->srcpad =
gst_pad_new_from_template (gst_element_class_get_pad_template (klass,
"src"), "src");
gst_element_add_pad (GST_ELEMENT (avimux), avimux->srcpad);
GST_OBJECT_FLAG_SET (GST_ELEMENT (avimux), GST_ELEMENT_EVENT_AWARE);
avimux->audiosinkpad = NULL;
avimux->audio_pad_connected = FALSE;
avimux->videosinkpad = NULL;
avimux->video_pad_connected = FALSE;
avimux->audio_buffer_queue = NULL;
avimux->video_buffer_queue = NULL;
avimux->num_frames = 0;
/* audio/video/AVI header initialisation */
memset (&(avimux->avi_hdr), 0, sizeof (gst_riff_avih));
memset (&(avimux->vids_hdr), 0, sizeof (gst_riff_strh));
memset (&(avimux->vids), 0, sizeof (gst_riff_strf_vids));
memset (&(avimux->auds_hdr), 0, sizeof (gst_riff_strh));
memset (&(avimux->auds), 0, sizeof (gst_riff_strf_auds));
avimux->vids_hdr.type = GST_MAKE_FOURCC ('v', 'i', 'd', 's');
avimux->vids_hdr.rate = 1000000;
avimux->avi_hdr.max_bps = 10000000;
avimux->auds_hdr.type = GST_MAKE_FOURCC ('a', 'u', 'd', 's');
avimux->vids_hdr.quality = 0xFFFFFFFF;
avimux->auds_hdr.quality = 0xFFFFFFFF;
avimux->tags = NULL;
avimux->idx = NULL;
avimux->write_header = TRUE;
avimux->enable_large_avi = TRUE;
gst_element_set_loop_function (GST_ELEMENT (avimux), gst_avimux_loop);
}
static GstPadLinkReturn
gst_avimux_vidsinkconnect (GstPad * pad, const GstCaps * vscaps)
{
GstAviMux *avimux;
GstStructure *structure;
const gchar *mimetype;
gdouble fps = 0.;
gboolean ret;
avimux = GST_AVIMUX (gst_pad_get_parent (pad));
GST_DEBUG ("avimux: video sinkconnect triggered on %s",
gst_pad_get_name (pad));
structure = gst_caps_get_structure (vscaps, 0);
mimetype = gst_structure_get_name (structure);
/* global */
avimux->vids.size = sizeof (gst_riff_strf_vids);
avimux->vids.planes = 1;
ret = gst_structure_get_int (structure, "width", &avimux->vids.width);
ret &= gst_structure_get_int (structure, "height", &avimux->vids.height);
ret &= gst_structure_get_double (structure, "framerate", &fps);
if (!ret)
return GST_PAD_LINK_REFUSED;
if (fps != 0.)
avimux->vids_hdr.scale = avimux->vids_hdr.rate / fps;
if (!strcmp (mimetype, "video/x-raw-yuv")) {
guint32 format;
gst_structure_get_fourcc (structure, "format", &format);
avimux->vids.compression = format;
switch (format) {
case GST_MAKE_FOURCC ('Y', 'U', 'Y', '2'):
avimux->vids.bit_cnt = 16;
break;
case GST_MAKE_FOURCC ('I', '4', '2', '0'):
avimux->vids.bit_cnt = 12;
break;
}
} else {
avimux->vids.bit_cnt = 24;
avimux->vids.compression = 0;
/* find format */
if (!strcmp (mimetype, "video/x-huffyuv")) {
avimux->vids.compression = GST_MAKE_FOURCC ('H', 'F', 'Y', 'U');
} else if (!strcmp (mimetype, "image/jpeg")) {
avimux->vids.compression = GST_MAKE_FOURCC ('M', 'J', 'P', 'G');
} else if (!strcmp (mimetype, "video/x-divx")) {
gint divxversion;
gst_structure_get_int (structure, "divxversion", &divxversion);
switch (divxversion) {
case 3:
avimux->vids.compression = GST_MAKE_FOURCC ('D', 'I', 'V', '3');
break;
case 4:
avimux->vids.compression = GST_MAKE_FOURCC ('D', 'I', 'V', 'X');
break;
case 5:
avimux->vids.compression = GST_MAKE_FOURCC ('D', 'X', '5', '0');
break;
}
} else if (!strcmp (mimetype, "video/x-xvid")) {
avimux->vids.compression = GST_MAKE_FOURCC ('X', 'V', 'I', 'D');
} else if (!strcmp (mimetype, "video/x-3ivx")) {
avimux->vids.compression = GST_MAKE_FOURCC ('3', 'I', 'V', '2');
} else if (!strcmp (mimetype, "video/x-msmpeg")) {
gint msmpegversion;
gst_structure_get_int (structure, "msmpegversion", &msmpegversion);
switch (msmpegversion) {
case 41:
avimux->vids.compression = GST_MAKE_FOURCC ('M', 'P', 'G', '4');
break;
case 42:
avimux->vids.compression = GST_MAKE_FOURCC ('M', 'P', '4', '2');
break;
case 43:
avimux->vids.compression = GST_MAKE_FOURCC ('M', 'P', '4', '3');
break;
}
} else if (!strcmp (mimetype, "video/x-dv")) {
avimux->vids.compression = GST_MAKE_FOURCC ('D', 'V', 'S', 'D');
} else if (!strcmp (mimetype, "video/x-h263")) {
avimux->vids.compression = GST_MAKE_FOURCC ('H', '2', '6', '3');
} else if (!strcmp (mimetype, "video/mpeg")) {
avimux->vids.compression = GST_MAKE_FOURCC ('M', 'P', 'E', 'G');
}
if (!avimux->vids.compression) {
return GST_PAD_LINK_DELAYED;
}
}
avimux->vids_hdr.fcc_handler = avimux->vids.compression;
avimux->vids.image_size = avimux->vids.height * avimux->vids.width;
avimux->avi_hdr.width = avimux->vids.width;
avimux->avi_hdr.height = avimux->vids.height;
avimux->avi_hdr.us_frame = avimux->vids_hdr.scale;
return GST_PAD_LINK_OK;
}
static GstPadLinkReturn
gst_avimux_audsinkconnect (GstPad * pad, const GstCaps * vscaps)
{
GstAviMux *avimux;
GstStructure *structure;
const gchar *mimetype;
int i;
avimux = GST_AVIMUX (gst_pad_get_parent (pad));
GST_DEBUG ("avimux: audio sinkconnect triggered on %s",
gst_pad_get_name (pad));
structure = gst_caps_get_structure (vscaps, 0);
mimetype = gst_structure_get_name (structure);
/* we want these for all */
gst_structure_get_int (structure, "channels", &i);
avimux->auds.channels = i;
gst_structure_get_int (structure, "rate", &i);
avimux->auds.rate = i;
if (!strcmp (mimetype, "audio/x-raw-int")) {
avimux->auds.format = GST_RIFF_WAVE_FORMAT_PCM;
gst_structure_get_int (structure, "width", &i);
avimux->auds.blockalign = i;
gst_structure_get_int (structure, "depth", &i);
avimux->auds.size = i;
/* set some more info straight */
avimux->auds.blockalign /= 8;
avimux->auds.blockalign *= avimux->auds.channels;
avimux->auds.av_bps = avimux->auds.blockalign * avimux->auds.rate;
} else if (!strcmp (mimetype, "audio/mpeg") ||
!strcmp (mimetype, "audio/x-vorbis") ||
!strcmp (mimetype, "audio/x-ac3")) {
avimux->auds.format = 0;
if (!strcmp (mimetype, "audio/mpeg")) {
gint layer = 3;
gst_structure_get_int (structure, "layer", &layer);
switch (layer) {
case 3:
avimux->auds.format = GST_RIFF_WAVE_FORMAT_MPEGL3;
break;
case 1:
case 2:
avimux->auds.format = GST_RIFF_WAVE_FORMAT_MPEGL12;
break;
}
} else if (!strcmp (mimetype, "audio/x-vorbis")) {
avimux->auds.format = GST_RIFF_WAVE_FORMAT_VORBIS3;
} else if (!strcmp (mimetype, "audio/x-ac3")) {
avimux->auds.format = GST_RIFF_WAVE_FORMAT_A52;
}
avimux->auds.blockalign = 1;
avimux->auds.av_bps = 0;
avimux->auds.size = 16;
if (!avimux->auds.format) {
return GST_PAD_LINK_REFUSED;
}
}
avimux->auds_hdr.rate = avimux->auds.blockalign * avimux->auds.rate;
avimux->auds_hdr.samplesize = avimux->auds.blockalign;
avimux->auds_hdr.scale = 1;
return GST_PAD_LINK_OK;
}
static void
gst_avimux_pad_link (GstPad * pad, GstPad * peer, gpointer data)
{
GstAviMux *avimux = GST_AVIMUX (data);
const gchar *padname = gst_pad_get_name (pad);
if (pad == avimux->audiosinkpad) {
avimux->audio_pad_connected = TRUE;
} else if (pad == avimux->videosinkpad) {
avimux->video_pad_connected = TRUE;
} else {
g_warning ("Unknown padname '%s'", padname);
return;
}
GST_DEBUG ("pad '%s' connected", padname);
}
static void
gst_avimux_pad_unlink (GstPad * pad, GstPad * peer, gpointer data)
{
GstAviMux *avimux = GST_AVIMUX (data);
const gchar *padname = gst_pad_get_name (pad);
if (pad == avimux->audiosinkpad) {
avimux->audio_pad_connected = FALSE;
} else if (pad == avimux->videosinkpad) {
avimux->video_pad_connected = FALSE;
} else {
g_warning ("Unknown padname '%s'", padname);
return;
}
GST_DEBUG ("pad '%s' unlinked", padname);
}
static GstPad *
gst_avimux_request_new_pad (GstElement * element,
GstPadTemplate * templ, const gchar * req_name)
{
GstAviMux *avimux;
GstPad *newpad;
GstElementClass *klass = GST_ELEMENT_GET_CLASS (element);
g_return_val_if_fail (templ != NULL, NULL);
if (templ->direction != GST_PAD_SINK) {
g_warning ("avimux: request pad that is not a SINK pad\n");
return NULL;
}
g_return_val_if_fail (GST_IS_AVIMUX (element), NULL);
avimux = GST_AVIMUX (element);
if (templ == gst_element_class_get_pad_template (klass, "audio_%d")) {
g_return_val_if_fail (avimux->audiosinkpad == NULL, NULL);
newpad = gst_pad_new_from_template (templ, "audio_00");
gst_pad_set_link_function (newpad, gst_avimux_audsinkconnect);
avimux->audiosinkpad = newpad;
} else if (templ == gst_element_class_get_pad_template (klass, "video_%d")) {
g_return_val_if_fail (avimux->videosinkpad == NULL, NULL);
newpad = gst_pad_new_from_template (templ, "video_00");
gst_pad_set_link_function (newpad, gst_avimux_vidsinkconnect);
avimux->videosinkpad = newpad;
} else {
g_warning ("avimux: this is not our template!\n");
return NULL;
}
g_signal_connect (newpad, "linked",
G_CALLBACK (gst_avimux_pad_link), (gpointer) avimux);
g_signal_connect (newpad, "unlinked",
G_CALLBACK (gst_avimux_pad_unlink), (gpointer) avimux);
gst_element_add_pad (element, newpad);
gst_pad_set_event_mask_function (newpad, gst_avimux_get_event_masks);
return newpad;
}
static void
gst_avimux_release_pad (GstElement * element, GstPad * pad)
{
GstAviMux *avimux = GST_AVIMUX (element);
if (pad == avimux->videosinkpad) {
avimux->videosinkpad = NULL;
} else if (pad == avimux->audiosinkpad) {
avimux->audiosinkpad = NULL;
} else {
g_warning ("Unknown pad %s", gst_pad_get_name (pad));
return;
}
GST_DEBUG ("Removed pad '%s'", gst_pad_get_name (pad));
gst_element_remove_pad (element, pad);
}
/* maybe some of these functions should be moved to riff.h? */
/* DISCLAIMER: this function is ugly. So be it (i.e. it makes the rest easier) */
static void
gst_avimux_write_tag (const GstTagList * list, const gchar * tag, gpointer data)
{
const struct
{
guint32 fcc;
gchar *tag;
} rifftags[] = {
{
GST_RIFF_INFO_ICMT, GST_TAG_COMMENT}, {
GST_RIFF_INFO_INAM, GST_TAG_TITLE}, {
GST_RIFF_INFO_ISFT, GST_TAG_ENCODER}, {
GST_RIFF_INFO_IGNR, GST_TAG_GENRE}, {
GST_RIFF_INFO_ICOP, GST_TAG_COPYRIGHT}, {
GST_RIFF_INFO_IART, GST_TAG_ARTIST}, {
GST_RIFF_INFO_IARL, GST_TAG_LOCATION}, {
0, NULL}
};
gint n, len, plen;
GstBuffer *buf = data;
guint8 *buffdata = GST_BUFFER_DATA (buf) + GST_BUFFER_SIZE (buf);
gchar *str;
for (n = 0; rifftags[n].fcc != 0; n++) {
if (!strcmp (rifftags[n].tag, tag) &&
gst_tag_list_get_string (list, tag, &str)) {
len = strlen (str);
plen = len + 1;
if (plen & 1)
plen++;
if (GST_BUFFER_MAXSIZE (buf) >= GST_BUFFER_SIZE (buf) + 8 + plen) {
GST_WRITE_UINT32_LE (buffdata, rifftags[n].fcc);
GST_WRITE_UINT32_LE (buffdata + 4, len + 1);
memcpy (buffdata + 8, str, len);
buffdata[8 + len] = 0;
GST_BUFFER_SIZE (buf) += 8 + plen;
}
break;
}
}
}
static GstBuffer *
gst_avimux_riff_get_avi_header (GstAviMux * avimux)
{
GstTagList *tags;
const GstTagList *iface_tags;
GstBuffer *buffer;
guint8 *buffdata;
guint size = 0;
/* first, let's see what actually needs to be in the buffer */
size += 32 + sizeof (gst_riff_avih); /* avi header */
if (avimux->video_pad_connected) { /* we have video */
size += 28 + sizeof (gst_riff_strh) + sizeof (gst_riff_strf_vids); /* vid hdr */
size += 24; /* odml header */
}
if (avimux->audio_pad_connected) { /* we have audio */
size += 28 + sizeof (gst_riff_strh) + sizeof (gst_riff_strf_auds); /* aud hdr */
}
/* this is the "riff size" */
avimux->header_size = size;
size += 12; /* avi data header */
/* tags */
iface_tags = gst_tag_setter_get_list (GST_TAG_SETTER (avimux));
if (iface_tags || avimux->tags) {
size += 1024;
if (iface_tags && avimux->tags) {
tags = gst_tag_list_merge (iface_tags, avimux->tags,
GST_TAG_MERGE_APPEND);
} else if (iface_tags) {
tags = gst_tag_list_copy (iface_tags);
} else {
tags = gst_tag_list_copy (avimux->tags);
}
} else {
tags = NULL;
}
/* allocate the buffer */
buffer = gst_buffer_new_and_alloc (size);
buffdata = GST_BUFFER_DATA (buffer);
GST_BUFFER_SIZE (buffer) = 0;
/* avi header metadata */
memcpy (buffdata + 0, "RIFF", 4);
GST_WRITE_UINT32_LE (buffdata + 4,
avimux->header_size + avimux->idx_size + avimux->data_size);
memcpy (buffdata + 8, "AVI ", 4);
memcpy (buffdata + 12, "LIST", 4);
GST_WRITE_UINT32_LE (buffdata + 16, avimux->header_size - 4 * 5);
memcpy (buffdata + 20, "hdrl", 4);
memcpy (buffdata + 24, "avih", 4);
GST_WRITE_UINT32_LE (buffdata + 28, sizeof (gst_riff_avih));
buffdata += 32;
GST_BUFFER_SIZE (buffer) += 32;
/* the AVI header itself */
GST_WRITE_UINT32_LE (buffdata + 0, avimux->avi_hdr.us_frame);
GST_WRITE_UINT32_LE (buffdata + 4, avimux->avi_hdr.max_bps);
GST_WRITE_UINT32_LE (buffdata + 8, avimux->avi_hdr.pad_gran);
GST_WRITE_UINT32_LE (buffdata + 12, avimux->avi_hdr.flags);
GST_WRITE_UINT32_LE (buffdata + 16, avimux->avi_hdr.tot_frames);
GST_WRITE_UINT32_LE (buffdata + 20, avimux->avi_hdr.init_frames);
GST_WRITE_UINT32_LE (buffdata + 24, avimux->avi_hdr.streams);
GST_WRITE_UINT32_LE (buffdata + 28, avimux->avi_hdr.bufsize);
GST_WRITE_UINT32_LE (buffdata + 32, avimux->avi_hdr.width);
GST_WRITE_UINT32_LE (buffdata + 36, avimux->avi_hdr.height);
GST_WRITE_UINT32_LE (buffdata + 40, avimux->avi_hdr.scale);
GST_WRITE_UINT32_LE (buffdata + 44, avimux->avi_hdr.rate);
GST_WRITE_UINT32_LE (buffdata + 48, avimux->avi_hdr.start);
GST_WRITE_UINT32_LE (buffdata + 52, avimux->avi_hdr.length);
buffdata += 56;
GST_BUFFER_SIZE (buffer) += 56;
if (avimux->video_pad_connected) {
/* video header metadata */
memcpy (buffdata + 0, "LIST", 4);
GST_WRITE_UINT32_LE (buffdata + 4,
sizeof (gst_riff_strh) + sizeof (gst_riff_strf_vids) + 4 * 5);
memcpy (buffdata + 8, "strl", 4);
/* generic header */
memcpy (buffdata + 12, "strh", 4);
GST_WRITE_UINT32_LE (buffdata + 16, sizeof (gst_riff_strh));
/* the actual header */
GST_WRITE_UINT32_LE (buffdata + 20, avimux->vids_hdr.type);
GST_WRITE_UINT32_LE (buffdata + 24, avimux->vids_hdr.fcc_handler);
GST_WRITE_UINT32_LE (buffdata + 28, avimux->vids_hdr.flags);
GST_WRITE_UINT32_LE (buffdata + 32, avimux->vids_hdr.priority);
GST_WRITE_UINT32_LE (buffdata + 36, avimux->vids_hdr.init_frames);
GST_WRITE_UINT32_LE (buffdata + 40, avimux->vids_hdr.scale);
GST_WRITE_UINT32_LE (buffdata + 44, avimux->vids_hdr.rate);
GST_WRITE_UINT32_LE (buffdata + 48, avimux->vids_hdr.start);
GST_WRITE_UINT32_LE (buffdata + 52, avimux->vids_hdr.length);
GST_WRITE_UINT32_LE (buffdata + 56, avimux->vids_hdr.bufsize);
GST_WRITE_UINT32_LE (buffdata + 60, avimux->vids_hdr.quality);
GST_WRITE_UINT32_LE (buffdata + 64, avimux->vids_hdr.samplesize);
/* the video header */
memcpy (buffdata + 68, "strf", 4);
GST_WRITE_UINT32_LE (buffdata + 72, sizeof (gst_riff_strf_vids));
/* the actual header */
GST_WRITE_UINT32_LE (buffdata + 76, avimux->vids.size);
GST_WRITE_UINT32_LE (buffdata + 80, avimux->vids.width);
GST_WRITE_UINT32_LE (buffdata + 84, avimux->vids.height);
GST_WRITE_UINT16_LE (buffdata + 88, avimux->vids.planes);
GST_WRITE_UINT16_LE (buffdata + 90, avimux->vids.bit_cnt);
GST_WRITE_UINT32_LE (buffdata + 92, avimux->vids.compression);
GST_WRITE_UINT32_LE (buffdata + 96, avimux->vids.image_size);
GST_WRITE_UINT32_LE (buffdata + 100, avimux->vids.xpels_meter);
GST_WRITE_UINT32_LE (buffdata + 104, avimux->vids.ypels_meter);
GST_WRITE_UINT32_LE (buffdata + 108, avimux->vids.num_colors);
GST_WRITE_UINT32_LE (buffdata + 112, avimux->vids.imp_colors);
buffdata += 116;
GST_BUFFER_SIZE (buffer) += 116;
}
if (avimux->audio_pad_connected) {
/* audio header */
memcpy (buffdata + 0, "LIST", 4);
GST_WRITE_UINT32_LE (buffdata + 4,
sizeof (gst_riff_strh) + sizeof (gst_riff_strf_auds) + 4 * 5);
memcpy (buffdata + 8, "strl", 4);
/* generic header */
memcpy (buffdata + 12, "strh", 4);
GST_WRITE_UINT32_LE (buffdata + 16, sizeof (gst_riff_strh));
/* the actual header */
GST_WRITE_UINT32_LE (buffdata + 20, avimux->auds_hdr.type);
GST_WRITE_UINT32_LE (buffdata + 24, avimux->auds_hdr.fcc_handler);
GST_WRITE_UINT32_LE (buffdata + 28, avimux->auds_hdr.flags);
GST_WRITE_UINT32_LE (buffdata + 32, avimux->auds_hdr.priority);
GST_WRITE_UINT32_LE (buffdata + 36, avimux->auds_hdr.init_frames);
GST_WRITE_UINT32_LE (buffdata + 40, avimux->auds_hdr.scale);
GST_WRITE_UINT32_LE (buffdata + 44, avimux->auds_hdr.rate);
GST_WRITE_UINT32_LE (buffdata + 48, avimux->auds_hdr.start);
GST_WRITE_UINT32_LE (buffdata + 52, avimux->auds_hdr.length);
GST_WRITE_UINT32_LE (buffdata + 56, avimux->auds_hdr.bufsize);
GST_WRITE_UINT32_LE (buffdata + 60, avimux->auds_hdr.quality);
GST_WRITE_UINT32_LE (buffdata + 64, avimux->auds_hdr.samplesize);
/* the audio header */
memcpy (buffdata + 68, "strf", 4);
GST_WRITE_UINT32_LE (buffdata + 72, sizeof (gst_riff_strf_auds));
/* the actual header */
GST_WRITE_UINT16_LE (buffdata + 76, avimux->auds.format);
GST_WRITE_UINT16_LE (buffdata + 78, avimux->auds.channels);
GST_WRITE_UINT32_LE (buffdata + 80, avimux->auds.rate);
GST_WRITE_UINT32_LE (buffdata + 84, avimux->auds.av_bps);
GST_WRITE_UINT16_LE (buffdata + 88, avimux->auds.blockalign);
GST_WRITE_UINT16_LE (buffdata + 90, avimux->auds.size);
buffdata += 92;
GST_BUFFER_SIZE (buffer) += 92;
}
if (avimux->video_pad_connected) {
/* odml header */
memcpy (buffdata + 0, "LIST", 4);
GST_WRITE_UINT32_LE (buffdata + 4, sizeof (guint32) + 4 * 3);
memcpy (buffdata + 8, "odml", 4);
memcpy (buffdata + 12, "dmlh", 4);
GST_WRITE_UINT32_LE (buffdata + 16, sizeof (guint32));
GST_WRITE_UINT32_LE (buffdata + 20, avimux->total_frames);
buffdata += 24;
GST_BUFFER_SIZE (buffer) += 24;
}
/* tags */
if (tags) {
guint8 *ptr;
guint startsize;
memcpy (buffdata + 0, "LIST", 4);
ptr = buffdata + 4; /* fill in later */
startsize = GST_BUFFER_SIZE (buffer) + 4;
memcpy (buffdata + 8, "INFO", 4);
buffdata += 12;
GST_BUFFER_SIZE (buffer) += 12;
/* 12 bytes is needed for data header */
GST_BUFFER_MAXSIZE (buffer) -= 12;
gst_tag_list_foreach (tags, gst_avimux_write_tag, buffer);
gst_tag_list_free (tags);
GST_BUFFER_MAXSIZE (buffer) += 12;
buffdata = GST_BUFFER_DATA (buffer) + GST_BUFFER_SIZE (buffer);
/* update list size */
GST_WRITE_UINT32_LE (ptr, GST_BUFFER_SIZE (buffer) - startsize - 4);
}
/* avi data header */
memcpy (buffdata + 0, "LIST", 4);
GST_WRITE_UINT32_LE (buffdata + 4, avimux->data_size);
memcpy (buffdata + 8, "movi", 4);
buffdata += 12;
GST_BUFFER_SIZE (buffer) += 12;
return buffer;
}
static GstBuffer *
gst_avimux_riff_get_avix_header (guint32 datax_size)
{
GstBuffer *buffer;
guint8 *buffdata;
buffer = gst_buffer_new_and_alloc (24);
buffdata = GST_BUFFER_DATA (buffer);
memcpy (buffdata + 0, "LIST", 4);
GST_WRITE_UINT32_LE (buffdata + 4, datax_size + 4 * 4);
memcpy (buffdata + 8, "AVIX", 4);
memcpy (buffdata + 12, "LIST", 4);
GST_WRITE_UINT32_LE (buffdata + 16, datax_size);
memcpy (buffdata + 20, "movi", 4);
return buffer;
}
static GstBuffer *
gst_avimux_riff_get_video_header (guint32 video_frame_size)
{
GstBuffer *buffer;
guint8 *buffdata;
buffer = gst_buffer_new_and_alloc (8);
buffdata = GST_BUFFER_DATA (buffer);
memcpy (buffdata + 0, "00db", 4);
GST_WRITE_UINT32_LE (buffdata + 4, video_frame_size);
return buffer;
}
static GstBuffer *
gst_avimux_riff_get_audio_header (guint32 audio_sample_size)
{
GstBuffer *buffer;
guint8 *buffdata;
buffer = gst_buffer_new_and_alloc (8);
buffdata = GST_BUFFER_DATA (buffer);
memcpy (buffdata + 0, "01wb", 4);
GST_WRITE_UINT32_LE (buffdata + 4, audio_sample_size);
return buffer;
}
/* some other usable functions (thankyou xawtv ;-) ) */
static void
gst_avimux_add_index (GstAviMux * avimux, guchar * code, guint32 flags,
guint32 size)
{
if (avimux->idx_index == avimux->idx_count) {
avimux->idx_count += 256;
avimux->idx =
realloc (avimux->idx,
avimux->idx_count * sizeof (gst_riff_index_entry));
}
memcpy (&(avimux->idx[avimux->idx_index].id), code, 4);
avimux->idx[avimux->idx_index].flags = LE_FROM_GUINT32 (flags);
avimux->idx[avimux->idx_index].offset = LE_FROM_GUINT32 (avimux->idx_offset);
avimux->idx[avimux->idx_index].size = LE_FROM_GUINT32 (size);
avimux->idx_index++;
}
static void
gst_avimux_write_index (GstAviMux * avimux)
{
GstBuffer *buffer;
guint8 *buffdata;
buffer = gst_buffer_new_and_alloc (8);
buffdata = GST_BUFFER_DATA (buffer);
memcpy (buffdata + 0, "idx1", 4);
GST_WRITE_UINT32_LE (buffdata + 4,
avimux->idx_index * sizeof (gst_riff_index_entry));
gst_pad_push (avimux->srcpad, GST_DATA (buffer));
buffer = gst_buffer_new ();
GST_BUFFER_SIZE (buffer) = avimux->idx_index * sizeof (gst_riff_index_entry);
GST_BUFFER_DATA (buffer) = (guint8 *) avimux->idx;
avimux->idx = NULL; /* will be free()'ed by gst_buffer_unref() */
avimux->total_data += GST_BUFFER_SIZE (buffer) + 8;
gst_pad_push (avimux->srcpad, GST_DATA (buffer));
avimux->idx_size += avimux->idx_index * sizeof (gst_riff_index_entry) + 8;
/* update header */
avimux->avi_hdr.flags |= GST_RIFF_AVIH_HASINDEX;
}
static void
gst_avimux_bigfile (GstAviMux * avimux, gboolean last)
{
GstBuffer *header;
GstEvent *event;
if (avimux->is_bigfile) {
/* sarch back */
event = gst_event_new_seek (GST_FORMAT_BYTES |
GST_SEEK_METHOD_SET | GST_SEEK_FLAG_FLUSH, avimux->avix_start);
/* if the event succeeds */
gst_pad_push (avimux->srcpad, GST_DATA (event));
/* rewrite AVIX header */
header = gst_avimux_riff_get_avix_header (avimux->datax_size);
gst_pad_push (avimux->srcpad, GST_DATA (header));
/* go back to current location */
event = gst_event_new_seek (GST_FORMAT_BYTES |
GST_SEEK_METHOD_SET | GST_SEEK_FLAG_FLUSH, avimux->total_data);
gst_pad_push (avimux->srcpad, GST_DATA (event));
}
avimux->avix_start = avimux->total_data;
if (last)
return;
avimux->is_bigfile = TRUE;
avimux->numx_frames = 0;
avimux->datax_size = 0;
header = gst_avimux_riff_get_avix_header (0);
avimux->total_data += GST_BUFFER_SIZE (header);
gst_pad_push (avimux->srcpad, GST_DATA (header));
}
/* enough header blabla now, let's go on to actually writing the headers */
static void
gst_avimux_start_file (GstAviMux * avimux)
{
GstBuffer *header;
avimux->total_data = 0;
avimux->total_frames = 0;
avimux->data_size = 4; /* ? */
avimux->datax_size = 0;
avimux->num_frames = 0;
avimux->numx_frames = 0;
avimux->audio_size = 0;
avimux->audio_time = 0;
avimux->avix_start = 0;
avimux->idx_index = 0;
avimux->idx_offset = 0; /* see 10 lines below */
avimux->idx_size = 0;
avimux->idx_count = 0;
avimux->idx = NULL;
/* header */
avimux->avi_hdr.streams =
(avimux->video_pad_connected ? 1 : 0) +
(avimux->audio_pad_connected ? 1 : 0);
avimux->is_bigfile = FALSE;
header = gst_avimux_riff_get_avi_header (avimux);
avimux->total_data += GST_BUFFER_SIZE (header);
gst_pad_push (avimux->srcpad, GST_DATA (header));
avimux->idx_offset = avimux->total_data;
avimux->write_header = FALSE;
avimux->restart = FALSE;
}
static void
gst_avimux_stop_file (GstAviMux * avimux)
{
GstEvent *event;
GstBuffer *header;
/* if bigfile, rewrite header, else write indexes */
if (avimux->video_pad_connected) {
if (avimux->is_bigfile) {
gst_avimux_bigfile (avimux, TRUE);
avimux->idx_size = 0;
} else {
gst_avimux_write_index (avimux);
}
}
/* set rate and everything having to do with that */
avimux->avi_hdr.max_bps = 0;
if (avimux->audio_pad_connected) {
/* calculate bps if needed */
if (!avimux->auds.av_bps) {
if (avimux->audio_time) {
avimux->auds.av_bps =
(GST_SECOND * avimux->audio_size) / avimux->audio_time;
} else {
GST_ELEMENT_ERROR (avimux, STREAM, MUX,
(_("No or invalid input audio, AVI stream will be corrupt.")),
(NULL));
avimux->auds.av_bps = 0;
}
avimux->auds_hdr.rate = avimux->auds.av_bps * avimux->auds_hdr.scale;
}
avimux->avi_hdr.max_bps += avimux->auds.av_bps;
}
if (avimux->video_pad_connected) {
avimux->avi_hdr.max_bps += ((avimux->vids.bit_cnt + 7) / 8) *
(1000000. / avimux->avi_hdr.us_frame) * avimux->vids.image_size;
}
/* statistics/total_frames/... */
avimux->avi_hdr.tot_frames = avimux->num_frames;
if (avimux->video_pad_connected) {
avimux->vids_hdr.length = avimux->num_frames;
}
if (avimux->audio_pad_connected) {
avimux->auds_hdr.length =
(avimux->audio_time * avimux->auds_hdr.rate) / GST_SECOND;
}
/* seek and rewrite the header */
header = gst_avimux_riff_get_avi_header (avimux);
event = gst_event_new_seek (GST_FORMAT_BYTES | GST_SEEK_METHOD_SET, 0);
gst_pad_push (avimux->srcpad, GST_DATA (event));
gst_pad_push (avimux->srcpad, GST_DATA (header));
event = gst_event_new_seek (GST_FORMAT_BYTES |
GST_SEEK_METHOD_SET, avimux->total_data);
gst_pad_push (avimux->srcpad, GST_DATA (event));
avimux->write_header = TRUE;
}
static void
gst_avimux_restart_file (GstAviMux * avimux)
{
GstEvent *event;
gst_avimux_stop_file (avimux);
event = gst_event_new (GST_EVENT_EOS);
gst_pad_push (avimux->srcpad, GST_DATA (event));
gst_avimux_start_file (avimux);
}
/* handle events (search) */
static gboolean
gst_avimux_handle_event (GstPad * pad, GstEvent * event)
{
GstAviMux *avimux;
GstEventType type;
avimux = GST_AVIMUX (gst_pad_get_parent (pad));
type = event ? GST_EVENT_TYPE (event) : GST_EVENT_UNKNOWN;
switch (type) {
case GST_EVENT_EOS:
/* is this allright? */
if (pad == avimux->videosinkpad) {
avimux->video_pad_eos = TRUE;
} else if (pad == avimux->audiosinkpad) {
avimux->audio_pad_eos = TRUE;
} else {
g_warning ("Unknown pad for EOS!");
}
break;
case GST_EVENT_TAG:
if (avimux->tags) {
gst_tag_list_insert (avimux->tags, gst_event_tag_get_list (event),
GST_TAG_MERGE_PREPEND);
} else {
avimux->tags = gst_tag_list_copy (gst_event_tag_get_list (event));
}
break;
default:
break;
}
gst_event_unref (event);
return TRUE;
}
/* fill the internal queue for each available pad */
static void
gst_avimux_fill_queue (GstAviMux * avimux)
{
GstBuffer *buffer;
while (!avimux->audio_buffer_queue &&
avimux->audiosinkpad &&
avimux->audio_pad_connected &&
GST_PAD_IS_USABLE (avimux->audiosinkpad) && !avimux->audio_pad_eos) {
buffer = GST_BUFFER (gst_pad_pull (avimux->audiosinkpad));
if (GST_IS_EVENT (buffer)) {
gst_avimux_handle_event (avimux->audiosinkpad, GST_EVENT (buffer));
} else {
avimux->audio_buffer_queue = buffer;
break;
}
}
while (!avimux->video_buffer_queue &&
avimux->videosinkpad &&
avimux->video_pad_connected &&
GST_PAD_IS_USABLE (avimux->videosinkpad) && !avimux->video_pad_eos) {
buffer = GST_BUFFER (gst_pad_pull (avimux->videosinkpad));
if (GST_IS_EVENT (buffer)) {
gst_avimux_handle_event (avimux->videosinkpad, GST_EVENT (buffer));
} else {
avimux->video_buffer_queue = buffer;
break;
}
}
}
/* send extra 'padding' data */
static void
gst_avimux_send_pad_data (GstAviMux * avimux, gulong num_bytes)
{
GstBuffer *buffer;
buffer = gst_buffer_new ();
GST_BUFFER_SIZE (buffer) = num_bytes;
GST_BUFFER_DATA (buffer) = g_malloc (num_bytes);
memset (GST_BUFFER_DATA (buffer), 0, num_bytes);
gst_pad_push (avimux->srcpad, GST_DATA (buffer));
}
/* do audio buffer */
static void
gst_avimux_do_audio_buffer (GstAviMux * avimux)
{
GstBuffer *data = avimux->audio_buffer_queue, *header;
gulong total_size, pad_bytes = 0;
/* write a audio header + index entry */
if (GST_BUFFER_SIZE (data) & 1) {
pad_bytes = 2 - (GST_BUFFER_SIZE (data) & 1);
}
header = gst_avimux_riff_get_audio_header (GST_BUFFER_SIZE (data));
total_size = GST_BUFFER_SIZE (header) + GST_BUFFER_SIZE (data) + pad_bytes;
if (avimux->is_bigfile) {
avimux->datax_size += total_size;
} else {
avimux->data_size += total_size;
avimux->audio_size += GST_BUFFER_SIZE (data);
avimux->audio_time += GST_BUFFER_DURATION (data);
gst_avimux_add_index (avimux, "01wb", 0x0, GST_BUFFER_SIZE (data));
}
gst_pad_push (avimux->srcpad, GST_DATA (header));
gst_pad_push (avimux->srcpad, GST_DATA (data));
if (pad_bytes) {
gst_avimux_send_pad_data (avimux, pad_bytes);
}
avimux->total_data += total_size;
avimux->idx_offset += total_size;
avimux->audio_buffer_queue = NULL;
}
/* do video buffer */
static void
gst_avimux_do_video_buffer (GstAviMux * avimux)
{
GstBuffer *data = avimux->video_buffer_queue, *header;
gulong total_size, pad_bytes = 0;
if (avimux->restart)
gst_avimux_restart_file (avimux);
/* write a video header + index entry */
if ((avimux->is_bigfile ? avimux->datax_size : avimux->data_size) +
GST_BUFFER_SIZE (data) > 1024 * 1024 * 2000) {
if (avimux->enable_large_avi)
gst_avimux_bigfile (avimux, FALSE);
else
gst_avimux_restart_file (avimux);
}
if (GST_BUFFER_SIZE (data) & 1) {
pad_bytes = 2 - (GST_BUFFER_SIZE (data) & 1);
}
header = gst_avimux_riff_get_video_header (GST_BUFFER_SIZE (data));
total_size = GST_BUFFER_SIZE (header) + GST_BUFFER_SIZE (data) + pad_bytes;
avimux->total_frames++;
if (avimux->is_bigfile) {
avimux->datax_size += total_size;
avimux->numx_frames++;
} else {
guint flags = 0x2;
if (GST_BUFFER_FLAG_IS_SET (data, GST_BUFFER_KEY_UNIT))
flags |= 0x10;
avimux->data_size += total_size;
avimux->num_frames++;
gst_avimux_add_index (avimux, "00db", flags, GST_BUFFER_SIZE (data));
}
gst_pad_push (avimux->srcpad, GST_DATA (header));
gst_pad_push (avimux->srcpad, GST_DATA (data));
if (pad_bytes) {
gst_avimux_send_pad_data (avimux, pad_bytes);
}
avimux->total_data += total_size;
avimux->idx_offset += total_size;
avimux->video_buffer_queue = NULL;
}
/* take the oldest buffer in our internal queue and push-it */
static gboolean
gst_avimux_do_one_buffer (GstAviMux * avimux)
{
if (avimux->video_buffer_queue && avimux->audio_buffer_queue) {
if (GST_BUFFER_TIMESTAMP (avimux->video_buffer_queue) <=
GST_BUFFER_TIMESTAMP (avimux->audio_buffer_queue))
gst_avimux_do_video_buffer (avimux);
else
gst_avimux_do_audio_buffer (avimux);
} else if (avimux->video_buffer_queue || avimux->audio_buffer_queue) {
if (avimux->video_buffer_queue)
gst_avimux_do_video_buffer (avimux);
else
gst_avimux_do_audio_buffer (avimux);
} else {
/* simply finish off the file and send EOS */
gst_avimux_stop_file (avimux);
gst_pad_push (avimux->srcpad, GST_DATA (gst_event_new (GST_EVENT_EOS)));
gst_element_set_eos (GST_ELEMENT (avimux));
return FALSE;
}
return TRUE;
}
static void
gst_avimux_loop (GstElement * element)
{
GstAviMux *avimux;
avimux = GST_AVIMUX (element);
/* first fill queue (some elements only set caps when
* flowing data), then write header */
gst_avimux_fill_queue (avimux);
if (avimux->write_header)
gst_avimux_start_file (avimux);
gst_avimux_do_one_buffer (avimux);
}
static void
gst_avimux_get_property (GObject * object,
guint prop_id, GValue * value, GParamSpec * pspec)
{
GstAviMux *avimux;
g_return_if_fail (GST_IS_AVIMUX (object));
avimux = GST_AVIMUX (object);
switch (prop_id) {
case ARG_BIGFILE:
g_value_set_boolean (value, avimux->enable_large_avi);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_avimux_set_property (GObject * object,
guint prop_id, const GValue * value, GParamSpec * pspec)
{
GstAviMux *avimux;
g_return_if_fail (GST_IS_AVIMUX (object));
avimux = GST_AVIMUX (object);
switch (prop_id) {
case ARG_BIGFILE:
avimux->enable_large_avi = g_value_get_boolean (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static GstStateChangeReturn
gst_avimux_change_state (GstElement * element, GstStateChange transition)
{
GstAviMux *avimux;
g_return_val_if_fail (GST_IS_AVIMUX (element), GST_STATE_CHANGE_FAILURE);
avimux = GST_AVIMUX (element);
switch (transition) {
case GST_STATE_CHANGE_PAUSED_TO_PLAYING:
avimux->video_pad_eos = avimux->audio_pad_eos = FALSE;
break;
case GST_STATE_CHANGE_PAUSED_TO_READY:
if (avimux->tags) {
gst_tag_list_free (avimux->tags);
avimux->tags = NULL;
}
break;
}
if (GST_ELEMENT_CLASS (parent_class)->change_state)
return GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
return GST_STATE_CHANGE_SUCCESS;
}