gstreamer/ext/ffmpeg/gstffmpegcodecmap.c

858 lines
25 KiB
C
Raw Normal View History

/* GStreamer
* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
* This file:
* Copyright (c) 2002-2003 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.
*/
#include "config.h"
#ifdef HAVE_FFMPEG_UNINSTALLED
#include <avcodec.h>
#else
#include <ffmpeg/avcodec.h>
#endif
#include <string.h>
#include <gst/gst.h>
#include "gstffmpegcodecmap.h"
/* this macro makes a caps width fixed or unfixed width/height
* properties depending on whether we've got a context.
*
* See below for why we use this.
*/
#define GST_FF_VID_CAPS_NEW(name, mimetype, props...) \
(context != NULL) ? \
GST_CAPS_NEW (name, \
mimetype, \
"width", GST_PROPS_INT (context->width), \
"height", GST_PROPS_INT (context->height),\
##props) \
: \
GST_CAPS_NEW (name, \
mimetype, \
"width", GST_PROPS_INT_RANGE (16, 4096), \
"height", GST_PROPS_INT_RANGE (16, 4096), \
##props)
/* same for audio - now with channels/sample rate
*/
#define GST_FF_AUD_CAPS_NEW(name, mimetype, props...) \
(context != NULL) ? \
GST_CAPS_NEW (name, \
mimetype, \
"rate", GST_PROPS_INT (context->sample_rate), \
"channels", GST_PROPS_INT (context->channels), \
##props) \
: \
GST_CAPS_NEW (name, \
mimetype, \
"rate", GST_PROPS_INT_RANGE (8000, 96000), \
"channels", GST_PROPS_INT_RANGE (1, 2), \
##props)
/* Convert a FFMPEG codec ID and optional AVCodecContext
* to a GstCaps. If the context is ommitted, no fixed values
* for video/audio size will be included in the GstCaps
*
* CodecID is primarily meant for compressed data GstCaps!
*/
GstCaps *
gst_ffmpeg_codecid_to_caps (enum CodecID codec_id,
AVCodecContext *context)
{
GstCaps *caps = NULL;
switch (codec_id) {
case CODEC_ID_MPEG1VIDEO:
/* this caps doesn't need width/height */
caps = GST_CAPS_NEW ("ffmpeg_mpeg1video",
"video/mpeg",
"mpegversion", GST_PROPS_INT (1),
"systemstream", GST_PROPS_BOOLEAN (FALSE)
);
break;
case CODEC_ID_H263P:
case CODEC_ID_H263I:
case CODEC_ID_H263:
caps = GST_FF_VID_CAPS_NEW ("ffmpeg_h263",
"video/h263"
);
break;
case CODEC_ID_RV10:
caps = GST_FF_VID_CAPS_NEW ("ffmpeg_rv10",
"video/realvideo"
);
break;
case CODEC_ID_MP2:
caps = GST_CAPS_NEW ("ffmpeg_mp2",
"audio/x-mp3",
"layer", GST_PROPS_INT (2)
);
break;
case CODEC_ID_MP3LAME:
caps = GST_CAPS_NEW ("ffmpeg_mp3",
"audio/x-mp3",
"layer", GST_PROPS_INT (3)
);
break;
case CODEC_ID_VORBIS:
caps = GST_CAPS_NEW ("ffmpeg_vorbis",
"application/x-ogg",
NULL
);
break;
case CODEC_ID_AC3:
caps = GST_CAPS_NEW ("ffmpeg_ac3",
"audio/ac3",
NULL
);
break;
case CODEC_ID_MJPEG:
case CODEC_ID_MJPEGB:
caps = GST_FF_VID_CAPS_NEW ("ffmpeg_mjpeg",
"video/jpeg"
);
break;
case CODEC_ID_MPEG4:
caps = GST_FF_VID_CAPS_NEW ("ffmpeg_mpeg4",
"video/mpeg",
"mpegversion", GST_PROPS_INT (4),
"systemstream", GST_PROPS_BOOLEAN (FALSE)
);
caps = gst_caps_append(caps,
GST_FF_VID_CAPS_NEW ("ffmpeg_divx",
"video/divx",
"divxversion", GST_PROPS_INT (5)
));
caps = gst_caps_append(caps,
GST_FF_VID_CAPS_NEW ("ffmpeg_xvid",
"video/xvid"
));
break;
/* weird quasi-codecs for the demuxers only */
case CODEC_ID_RAWVIDEO:
/* we use a shortcut to the raw-video pad function */
return gst_ffmpeg_codectype_to_caps (CODEC_TYPE_VIDEO, context);
case CODEC_ID_MSMPEG4V1:
caps = GST_FF_VID_CAPS_NEW ("ffmpeg_msmpeg4v1",
"video/x-msmpeg",
"mpegversion", GST_PROPS_INT (41)
);
break;
case CODEC_ID_MSMPEG4V2:
caps = GST_FF_VID_CAPS_NEW ("ffmpeg_msmpeg4v2",
"video/x-msmpeg",
"mpegversion", GST_PROPS_INT (42)
);
break;
case CODEC_ID_MSMPEG4V3:
caps = GST_FF_VID_CAPS_NEW ("ffmpeg_msmpeg4v3",
"video/x-msmpeg",
"mpegversion", GST_PROPS_INT (43)
);
break;
case CODEC_ID_WMV1:
caps = GST_FF_VID_CAPS_NEW ("ffmpeg_wmv1",
"video/wmv",
"wmvversion", GST_PROPS_INT (1)
);
break;
case CODEC_ID_WMV2:
caps = GST_FF_VID_CAPS_NEW ("ffmpeg_wmv2",
"video/wmv",
"wmvversion", GST_PROPS_INT (2)
);
break;
case CODEC_ID_SVQ1:
caps = GST_FF_VID_CAPS_NEW ("ffmpeg_svq1",
"video/x-svq",
"svqversion", GST_PROPS_INT (1)
);
break;
case CODEC_ID_SVQ3:
caps = GST_FF_VID_CAPS_NEW ("ffmpeg_svq3",
"video/x-svq",
"svqversion", GST_PROPS_INT (3)
);
break;
case CODEC_ID_DVAUDIO: /* ??? */
case CODEC_ID_DVVIDEO:
if (!context) {
caps = GST_FF_VID_CAPS_NEW ("ffmpeg_dvvideo",
"video/dv",
"format", GST_PROPS_LIST (
GST_PROPS_STRING ("NTSC"),
GST_PROPS_STRING ("PAL")
)
);
} else {
GstPropsEntry *normentry;
if (context->height == 576) {
normentry = gst_props_entry_new("format", GST_PROPS_STRING ("PAL"));
} else {
normentry = gst_props_entry_new("format", GST_PROPS_STRING ("NTSC"));
}
caps = GST_FF_VID_CAPS_NEW ("ffmpeg_dvvideo",
"video/dv"
);
gst_props_add_entry(caps->properties, normentry);
}
break;
case CODEC_ID_WMAV1:
caps = GST_CAPS_NEW ("ffmpeg_wma1",
"audio/wma",
"wmaversion", GST_PROPS_INT (1)
);
break;
case CODEC_ID_WMAV2:
caps = GST_CAPS_NEW ("ffmpeg_wma2",
"audio/wma",
"wmaversion", GST_PROPS_INT (2)
);
break;
case CODEC_ID_MACE3:
/* .. */
break;
case CODEC_ID_MACE6:
/* .. */
break;
case CODEC_ID_HUFFYUV:
caps = GST_FF_VID_CAPS_NEW ("ffmpeg_huffyuv",
"video/huffyuv"
);
break;
case CODEC_ID_CYUV:
/* .. */
break;
case CODEC_ID_H264:
caps = GST_FF_VID_CAPS_NEW ("ffmpeg_h264",
"video/h264"
);
break;
case CODEC_ID_INDEO3:
caps = GST_FF_VID_CAPS_NEW ("ffmpeg_indeo3",
"video/indeo3"
);
break;
case CODEC_ID_VP3:
caps = GST_FF_VID_CAPS_NEW ("ffmpeg_vp3",
"video/vp3"
);
caps = gst_caps_append(caps,
GST_FF_VID_CAPS_NEW ("ffmpeg_theora",
"video/x-theora"
));
break;
case CODEC_ID_AAC:
/* .. */
break;
case CODEC_ID_MPEG4AAC:
caps = GST_FF_VID_CAPS_NEW ("ffmpeg_mpeg4aac",
"audio/mpeg",
"systemstream", GST_PROPS_BOOLEAN (FALSE),
"mpegversion", GST_PROPS_INT (4)
);
break;
case CODEC_ID_ASV1:
/* .. */
break;
case CODEC_ID_FFV1:
caps = GST_FF_VID_CAPS_NEW ("ffmpeg_ffv1",
"video/x-ffv1"
);
break;
case CODEC_ID_4XM:
/* .. */
break;
/* weird quasi-codecs for the demuxers only */
case CODEC_ID_PCM_S16LE:
case CODEC_ID_PCM_S16BE:
case CODEC_ID_PCM_U16LE:
case CODEC_ID_PCM_U16BE:
case CODEC_ID_PCM_S8:
case CODEC_ID_PCM_U8:
case CODEC_ID_PCM_MULAW:
case CODEC_ID_PCM_ALAW:
do {
gint law = -1, width = 0, depth = 0, endianness = 0;
gboolean signedness = FALSE; /* blabla */
switch (codec_id) {
case CODEC_ID_PCM_S16LE:
law = 0; width = 16; depth = 16;
endianness = G_LITTLE_ENDIAN;
signedness = TRUE;
break;
case CODEC_ID_PCM_S16BE:
law = 0; width = 16; depth = 16;
endianness = G_BIG_ENDIAN;
signedness = TRUE;
break;
case CODEC_ID_PCM_U16LE:
law = 0; width = 16; depth = 16;
endianness = G_LITTLE_ENDIAN;
signedness = FALSE;
break;
case CODEC_ID_PCM_U16BE:
law = 0; width = 16; depth = 16;
endianness = G_BIG_ENDIAN;
signedness = FALSE;
break;
case CODEC_ID_PCM_S8:
law = 0; width = 8; depth = 8;
endianness = G_BYTE_ORDER;
signedness = TRUE;
break;
case CODEC_ID_PCM_U8:
law = 0; width = 8; depth = 8;
endianness = G_BYTE_ORDER;
signedness = FALSE;
break;
case CODEC_ID_PCM_MULAW:
law = 1; width = 8; depth = 8;
endianness = G_BYTE_ORDER;
signedness = FALSE;
break;
case CODEC_ID_PCM_ALAW:
law = 2; width = 8; depth = 8;
endianness = G_BYTE_ORDER;
signedness = FALSE;
break;
default:
g_assert(0); /* don't worry, we never get here */
break;
}
caps = GST_FF_AUD_CAPS_NEW ("ffmpeg_pcmaudio",
"audio/raw",
"format", GST_PROPS_STRING ("int"),
"law", GST_PROPS_INT (law),
"width", GST_PROPS_INT (width),
"depth", GST_PROPS_INT (depth),
"endianness", GST_PROPS_INT (endianness),
"signed", GST_PROPS_BOOLEAN (signedness)
);
} while (0);
break;
case CODEC_ID_ADPCM_IMA_QT:
/* .. */
break;
case CODEC_ID_ADPCM_IMA_WAV:
/* .. */
break;
case CODEC_ID_ADPCM_MS:
/* .. */
break;
case CODEC_ID_AMR_NB:
/* .. */
break;
default:
/* .. */
break;
}
if (caps != NULL) {
char *str = g_strdup_printf("The caps that belongs to codec_id=%d",
codec_id);
gst_caps_debug(caps, str);
g_free(str);
}
return caps;
}
/* Convert a FFMPEG Pixel Format and optional AVCodecContext
* to a GstCaps. If the context is ommitted, no fixed values
* for video/audio size will be included in the GstCaps
*
* See below for usefullness
*/
static GstCaps *
gst_ffmpeg_pixfmt_to_caps (enum PixelFormat pix_fmt,
AVCodecContext *context)
{
GstCaps *caps = NULL;
int bpp = 0, depth = 0, endianness = 0;
gulong g_mask = 0, r_mask = 0, b_mask = 0;
guint32 fmt = 0;
switch (pix_fmt) {
case PIX_FMT_YUV420P:
fmt = GST_MAKE_FOURCC ('I','4','2','0');
break;
case PIX_FMT_YUV422:
fmt = GST_MAKE_FOURCC ('Y','U','Y','2');
break;
case PIX_FMT_RGB24:
bpp = depth = 24;
endianness = G_BIG_ENDIAN;
r_mask = 0xff0000; g_mask = 0x00ff00; b_mask = 0x0000ff;
break;
case PIX_FMT_BGR24:
bpp = depth = 24;
endianness = G_LITTLE_ENDIAN;
r_mask = 0xff0000; g_mask = 0x00ff00; b_mask = 0x0000ff;
break;
case PIX_FMT_YUV422P:
/* .. */
break;
case PIX_FMT_YUV444P:
/* .. */
break;
case PIX_FMT_RGBA32:
bpp = depth = 32;
endianness = G_BYTE_ORDER;
r_mask = 0x00ff0000; g_mask = 0x0000ff00; b_mask = 0x000000ff;
break;
case PIX_FMT_YUV410P:
/* .. */
break;
case PIX_FMT_YUV411P:
fmt = GST_MAKE_FOURCC ('Y','4','1','P');
break;
case PIX_FMT_RGB565:
bpp = depth = 16;
endianness = G_BYTE_ORDER;
r_mask = 0xf800; g_mask = 0x07e0; b_mask = 0x001f;
break;
case PIX_FMT_RGB555:
bpp = 16; depth = 15;
endianness = G_BYTE_ORDER;
r_mask = 0x7c00; g_mask = 0x03e0; b_mask = 0x001f;
break;
default:
/* give up ... */
break;
}
if (bpp != 0) {
fmt = GST_MAKE_FOURCC ('R','G','B',' ');
caps = GST_FF_VID_CAPS_NEW ("ffmpeg_rawvideo",
"video/raw",
"format", GST_PROPS_FOURCC (fmt),
"bpp", GST_PROPS_INT (bpp),
"depth", GST_PROPS_INT (depth),
"red_mask", GST_PROPS_INT (r_mask),
"green_mask", GST_PROPS_INT (g_mask),
"blue_mask", GST_PROPS_INT (b_mask),
"endianness", GST_PROPS_INT (endianness)
);
} else if (fmt) {
caps = GST_FF_VID_CAPS_NEW ("ffmpeg_rawvideo",
"video/raw",
"format", GST_PROPS_FOURCC (fmt)
);
}
if (caps != NULL) {
char *str = g_strdup_printf("The caps that belongs to pix_fmt=%d",
pix_fmt);
gst_caps_debug(caps, str);
g_free(str);
}
return caps;
}
/* Convert a FFMPEG Sample Format and optional AVCodecContext
* to a GstCaps. If the context is ommitted, no fixed values
* for video/audio size will be included in the GstCaps
*
* See below for usefullness
*/
static GstCaps *
gst_ffmpeg_smpfmt_to_caps (enum SampleFormat sample_fmt,
AVCodecContext *context)
{
GstCaps *caps = NULL;
int bpp = 0;
gboolean signedness = FALSE;
switch (sample_fmt) {
case SAMPLE_FMT_S16:
signedness = TRUE;
bpp = 16;
break;
default:
/* .. */
break;
}
if (bpp) {
caps = GST_FF_AUD_CAPS_NEW ("ffmpeg_rawaudio",
"audio/raw",
"signed", GST_PROPS_BOOLEAN (signedness),
"endianness", GST_PROPS_INT (G_BYTE_ORDER),
"width", GST_PROPS_INT (bpp),
"depth", GST_PROPS_INT (bpp),
"law", GST_PROPS_INT (0),
"format", GST_PROPS_STRING ("int")
);
}
if (caps != NULL) {
char *str = g_strdup_printf("The caps that belongs to sample_fmt=%d",
sample_fmt);
gst_caps_debug(caps, str);
g_free(str);
}
return caps;
}
/* Convert a FFMPEG codec Type and optional AVCodecContext
* to a GstCaps. If the context is ommitted, no fixed values
* for video/audio size will be included in the GstCaps
*
* CodecType is primarily meant for uncompressed data GstCaps!
*/
GstCaps *
gst_ffmpeg_codectype_to_caps (enum CodecType codec_type,
AVCodecContext *context)
{
GstCaps *caps = NULL;
switch (codec_type) {
case CODEC_TYPE_VIDEO:
if (context) {
caps = gst_ffmpeg_pixfmt_to_caps (context->pix_fmt, context);
} else {
GstCaps *temp;
enum PixelFormat i;
for (i = 0; i < PIX_FMT_NB; i++) {
temp = gst_ffmpeg_pixfmt_to_caps (i, NULL);
if (temp != NULL) {
caps = gst_caps_append (caps, temp);
}
}
}
break;
case CODEC_TYPE_AUDIO:
if (context) {
caps = gst_ffmpeg_smpfmt_to_caps (context->sample_fmt, context);
} else {
GstCaps *temp;
enum SampleFormat i;
for (i = 0; i <= SAMPLE_FMT_S16; i++) {
temp = gst_ffmpeg_smpfmt_to_caps (i, NULL);
if (temp != NULL) {
caps = gst_caps_append (caps, temp);
}
}
}
break;
default:
/* .. */
break;
}
if (caps != NULL) {
char *str = g_strdup_printf("The caps that belongs to codec_type=%d",
codec_type);
gst_caps_debug(caps, str);
g_free(str);
}
return caps;
}
/* Convert a GstCaps (audio/raw) to a FFMPEG SampleFmt
* and other audio properties in a AVCodecContext.
*
* For usefullness, see below
*/
static void
gst_ffmpeg_caps_to_smpfmt (GstCaps *caps,
AVCodecContext *context)
{
if (gst_caps_has_property_typed (caps, "width",
GST_PROPS_INT_TYPE) &&
gst_caps_has_property_typed (caps, "depth",
GST_PROPS_INT_TYPE) &&
gst_caps_has_property_typed (caps, "signed",
GST_PROPS_BOOLEAN_TYPE) &&
gst_caps_has_property_typed (caps, "endianness",
GST_PROPS_INT_TYPE)) {
gint depth = 0, width = 0, endianness = 0;
gboolean signedness = FALSE;
gst_caps_get (caps,
"width", &width,
"depth", &depth,
"endianness", &endianness,
"signed", &signedness,
NULL);
if (width == 16 && depth == 16 &&
endianness == G_BYTE_ORDER && signedness == TRUE) {
context->sample_fmt = SAMPLE_FMT_S16;
}
}
if (gst_caps_has_property_typed (caps, "channels",
GST_PROPS_INT_TYPE)) {
gst_caps_get_int (caps, "rate", &context->channels);
}
if (gst_caps_has_property_typed (caps, "rate",
GST_PROPS_INT_TYPE)) {
gst_caps_get_int (caps, "rate", &context->sample_rate);
}
}
/* Convert a GstCaps (video/raw) to a FFMPEG PixFmt
* and other video properties in a AVCodecContext.
*
* For usefullness, see below
*/
static void
gst_ffmpeg_caps_to_pixfmt (GstCaps *caps,
AVCodecContext *context)
{
if (gst_caps_has_property_typed (caps, "width",
GST_PROPS_INT_TYPE) &&
gst_caps_has_property_typed (caps, "height",
GST_PROPS_INT_TYPE)) {
gst_caps_get (caps,
"width", &context->width,
"height", &context->height,
NULL);
}
if (gst_caps_has_property_typed (caps, "format",
GST_PROPS_FOURCC_TYPE)) {
guint32 fourcc;
gst_caps_get_fourcc_int (caps, "format", &fourcc);
switch (fourcc) {
case GST_MAKE_FOURCC ('Y','U','Y','2'):
context->pix_fmt = PIX_FMT_YUV422;
break;
case GST_MAKE_FOURCC ('I','4','2','0'):
context->pix_fmt = PIX_FMT_YUV420P;
break;
case GST_MAKE_FOURCC ('Y','4','1','P'):
context->pix_fmt = PIX_FMT_YUV411P;
break;
case GST_MAKE_FOURCC ('R','G','B',' '):
if (gst_caps_has_property_typed (caps, "depth",
GST_PROPS_INT_TYPE) &&
gst_caps_has_property_typed (caps, "endianness",
GST_PROPS_INT_TYPE)) {
gint depth = 0, endianness = 0;
gst_caps_get_int (caps, "depth", &depth);
gst_caps_get_int (caps, "endianness", &endianness);
switch (depth) {
case 32:
if (endianness == G_BYTE_ORDER)
context->pix_fmt = PIX_FMT_RGBA32;
break;
case 24:
switch (endianness) {
case G_LITTLE_ENDIAN:
context->pix_fmt = PIX_FMT_BGR24;
break;
case G_BIG_ENDIAN:
context->pix_fmt = PIX_FMT_RGB24;
break;
default:
/* nothing */
break;
}
break;
case 16:
if (endianness == G_BYTE_ORDER)
context->pix_fmt = PIX_FMT_RGB565;
break;
case 15:
if (endianness == G_BYTE_ORDER)
context->pix_fmt = PIX_FMT_RGB555;
break;
default:
/* nothing */
break;
}
}
break;
default:
/* nothing */
break;
}
}
}
/* Convert a GstCaps and a FFMPEG codec Type to a
* AVCodecContext. If the context is ommitted, no fixed values
* for video/audio size will be included in the context
*
* CodecType is primarily meant for uncompressed data GstCaps!
*/
void
gst_ffmpeg_caps_to_codectype (enum CodecType type,
GstCaps *caps,
AVCodecContext *context)
{
if (context == NULL)
return;
switch (type) {
case CODEC_TYPE_VIDEO:
gst_ffmpeg_caps_to_pixfmt (caps, context);
break;
case CODEC_TYPE_AUDIO:
gst_ffmpeg_caps_to_smpfmt (caps, context);
break;
default:
/* unknown */
break;
}
}
/* _formatid_to_caps () is meant for muxers/demuxers, it
* transforms a name (ffmpeg way of ID'ing these, why don't
* they have unique numerical IDs?) to the corresponding
* caps belonging to that mux-format
*
* Note: we don't need any additional info because the caps
* isn't supposed to contain any useful info besides the
* media type anyway
*/
GstCaps *
gst_ffmpeg_formatid_to_caps (const gchar *format_name)
{
GstCaps *caps = NULL;
if (!strcmp (format_name, "mpeg")) {
caps = GST_CAPS_NEW ("ffmpeg_mpeg",
"video/mpeg",
"systemstream", GST_PROPS_BOOLEAN (TRUE)
);
} else if (!strcmp (format_name, "mpegts")) {
caps = GST_CAPS_NEW ("ffmpeg_mpegts",
"video/mpegts",
"systemstream", GST_PROPS_BOOLEAN (TRUE)
);
} else if (!strcmp (format_name, "rm")) {
caps = GST_CAPS_NEW ("ffmpeg_rm",
"audio/x-pn-realaudio",
NULL
);
} else if (!strcmp (format_name, "asf")) {
caps = GST_CAPS_NEW ("ffmpeg_asf",
"video/x-ms-asf",
NULL
);
} else if (!strcmp (format_name, "avi")) {
caps = GST_CAPS_NEW ("ffmpeg_avi",
"video/avi",
NULL
);
} else if (!strcmp (format_name, "wav")) {
caps = GST_CAPS_NEW ("ffmpeg_wav",
"video/x-wav",
NULL
);
} else if (!strcmp (format_name, "swf")) {
caps = GST_CAPS_NEW ("ffmpeg_swf",
"application/x-shockwave-flash",
NULL
);
} else if (!strcmp (format_name, "au")) {
caps = GST_CAPS_NEW ("ffmpeg_au",
"audio/basic",
NULL
);
} else if (!strcmp (format_name, "mov")) {
caps = GST_CAPS_NEW ("ffmpeg_quicktime",
"video/quicktime",
NULL
);
} else if (!strcmp (format_name, "dv")) {
caps = GST_CAPS_NEW ("ffmpeg_dv",
"video/dv",
"systemstream", GST_PROPS_BOOLEAN (TRUE)
);
} else if (!strcmp (format_name, "4xm")) {
caps = GST_CAPS_NEW ("ffmpeg_4xm",
"video/x-4xm",
NULL
);
} else {
/* unknown! */
}
return caps;
}