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gstreamer/gst-libs/gst/riff/riff-media.c
Ronald S. Bultje b91cce0067 gst-libs/gst/riff/riff-media.c: Fix double end-to-native symbol conversion (#148021). 
Original commit message from CVS:
* gst-libs/gst/riff/riff-media.c:
(gst_riff_create_audio_caps_with_data):
Fix double end-to-native symbol conversion (#148021).
2004-07-20 21:06:35 +00:00

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/* GStreamer RIFF I/O
* Copyright (C) 2003 Ronald Bultje <rbultje@ronald.bitfreak.net>
*
* riff-media.h: RIFF-id to/from caps routines
*
* 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 "riff-ids.h"
#include "riff-media.h"
/**
* gst_riff_create_video_caps_with_data:
* @codec_fcc: fourCC codec for this codec.
* @strh: pointer to the strh stream header structure.
* @strf: pointer to the strf stream header structure, including any
* data that is within the range of strf.size, but excluding any
* additional data withint this chunk but outside strf.size.
* @strf_data: a #GstBuffer containing the additional data in the strf
* chunk outside reach of strf.size. Ususally a palette.
* @strd_data: a #GstBuffer containing the data in the strd stream header
* chunk. Usually codec initialization data.
* @codec_name: if given, will be filled with a human-readable codec name.
*/
GstCaps *
gst_riff_create_video_caps_with_data (guint32 codec_fcc,
gst_riff_strh * strh, gst_riff_strf_vids * strf,
GstBuffer * strf_data, GstBuffer * strd_data, char **codec_name)
{
GstCaps *caps = NULL;
switch (codec_fcc) {
case GST_MAKE_FOURCC ('I', '4', '2', '0'):
caps = gst_caps_new_simple ("video/x-raw-yuv",
"format", GST_TYPE_FOURCC, codec_fcc, NULL);
if (codec_name)
*codec_name = g_strdup ("Uncompressed planar YUV 4:2:0");
break;
case GST_MAKE_FOURCC ('Y', 'U', 'Y', '2'):
caps = gst_caps_new_simple ("video/x-raw-yuv",
"format", GST_TYPE_FOURCC, codec_fcc, NULL);
if (codec_name)
*codec_name = g_strdup ("Uncompressed packed YUV 4:2:2");
break;
case GST_MAKE_FOURCC ('M', 'J', 'P', 'G'): /* YUY2 MJPEG */
caps = gst_caps_new_simple ("image/jpeg", NULL);
if (codec_name)
*codec_name = g_strdup ("Motion JPEG");
break;
case GST_MAKE_FOURCC ('J', 'P', 'E', 'G'): /* generic (mostly RGB) MJPEG */
caps = gst_caps_new_simple ("image/jpeg", NULL);
if (codec_name)
*codec_name = g_strdup ("JPEG Still Image");
break;
case GST_MAKE_FOURCC ('P', 'I', 'X', 'L'): /* Miro/Pinnacle fourccs */
case GST_MAKE_FOURCC ('V', 'I', 'X', 'L'): /* Miro/Pinnacle fourccs */
caps = gst_caps_new_simple ("image/jpeg", NULL);
if (codec_name)
*codec_name = g_strdup ("Miro/Pinnacle Motion JPEG Video");
break;
case GST_MAKE_FOURCC ('H', 'F', 'Y', 'U'):
caps = gst_caps_new_simple ("video/x-huffyuv", NULL);
if (codec_name)
*codec_name = g_strdup ("Huffman Lossless Codec");
break;
case GST_MAKE_FOURCC ('M', 'P', 'E', 'G'):
case GST_MAKE_FOURCC ('M', 'P', 'G', 'I'):
case GST_MAKE_FOURCC ('m', 'p', 'g', '1'):
case GST_MAKE_FOURCC ('M', 'P', 'G', '1'):
caps = gst_caps_new_simple ("video/mpeg",
"systemstream", G_TYPE_BOOLEAN, FALSE,
"mpegversion", G_TYPE_INT, 1, NULL);
if (codec_name)
*codec_name = g_strdup ("MPEG video");
break;
case GST_MAKE_FOURCC ('M', 'P', 'G', '2'):
case GST_MAKE_FOURCC ('m', 'p', 'g', '2'):
caps = gst_caps_new_simple ("video/mpeg",
"systemstream", G_TYPE_BOOLEAN, FALSE,
"mpegversion", G_TYPE_INT, 2, NULL);
if (codec_name)
*codec_name = g_strdup ("MPEG 2 video");
break;
case GST_MAKE_FOURCC ('H', '2', '6', '3'):
caps = gst_caps_new_simple ("video/x-h263", NULL);
if (codec_name)
*codec_name = g_strdup ("ITU H.26n");
break;
case GST_MAKE_FOURCC ('i', '2', '6', '3'):
caps = gst_caps_new_simple ("video/x-h263", NULL);
if (codec_name)
*codec_name = g_strdup ("ITU H.263");
break;
case GST_MAKE_FOURCC ('L', '2', '6', '3'):
caps = gst_caps_new_simple ("video/x-h263", NULL);
if (codec_name)
*codec_name = g_strdup ("Lead H.263");
break;
case GST_MAKE_FOURCC ('M', '2', '6', '3'):
caps = gst_caps_new_simple ("video/x-h263", NULL);
if (codec_name)
*codec_name = g_strdup ("Microsoft H.263");
break;
case GST_MAKE_FOURCC ('V', 'D', 'O', 'W'):
caps = gst_caps_new_simple ("video/x-h263", NULL);
if (codec_name)
*codec_name = g_strdup ("VDOLive");
break;
case GST_MAKE_FOURCC ('V', 'I', 'V', 'O'):
caps = gst_caps_new_simple ("video/x-h263", NULL);
if (codec_name)
*codec_name = g_strdup ("Vivo H.263");
break;
case GST_MAKE_FOURCC ('x', '2', '6', '3'):
caps = gst_caps_new_simple ("video/x-h263", NULL);
if (codec_name)
*codec_name = g_strdup ("Xirlink H.263");
break;
case GST_MAKE_FOURCC ('D', 'I', 'V', '3'):
case GST_MAKE_FOURCC ('d', 'i', 'v', '3'):
case GST_MAKE_FOURCC ('D', 'I', 'V', '4'):
case GST_MAKE_FOURCC ('d', 'i', 'v', '4'):
case GST_MAKE_FOURCC ('D', 'I', 'V', '5'):
case GST_MAKE_FOURCC ('d', 'i', 'v', '5'):
case GST_MAKE_FOURCC ('D', 'I', 'V', '6'):
case GST_MAKE_FOURCC ('d', 'i', 'v', '6'):
caps = gst_caps_new_simple ("video/x-divx",
"divxversion", G_TYPE_INT, 3, NULL);
if (codec_name)
*codec_name = g_strdup ("DivX MS-MPEG-4 Version 3");
break;
case GST_MAKE_FOURCC ('d', 'i', 'v', 'x'):
case GST_MAKE_FOURCC ('D', 'I', 'V', 'X'):
caps = gst_caps_new_simple ("video/x-divx",
"divxversion", G_TYPE_INT, 4, NULL);
if (codec_name)
*codec_name = g_strdup ("DivX MPEG-4 Version 4");
break;
case GST_MAKE_FOURCC ('D', 'X', '5', '0'):
caps = gst_caps_new_simple ("video/x-divx",
"divxversion", G_TYPE_INT, 5, NULL);
if (codec_name)
*codec_name = g_strdup ("DivX MPEG-4 Version 5");
break;
case GST_MAKE_FOURCC ('X', 'V', 'I', 'D'):
case GST_MAKE_FOURCC ('x', 'v', 'i', 'd'):
caps = gst_caps_new_simple ("video/x-xvid", NULL);
if (codec_name)
*codec_name = g_strdup ("XVID MPEG-4");
break;
case GST_MAKE_FOURCC ('M', 'P', 'G', '4'):
caps = gst_caps_new_simple ("video/x-msmpeg",
"msmpegversion", G_TYPE_INT, 41, NULL);
if (codec_name)
*codec_name = g_strdup ("Microsoft MPEG-4 4.1");
break;
case GST_MAKE_FOURCC ('m', 'p', '4', '2'):
case GST_MAKE_FOURCC ('M', 'P', '4', '2'):
caps = gst_caps_new_simple ("video/x-msmpeg",
"msmpegversion", G_TYPE_INT, 42, NULL);
if (codec_name)
*codec_name = g_strdup ("Microsoft MPEG-4 4.2");
break;
case GST_MAKE_FOURCC ('m', 'p', '4', '3'):
case GST_MAKE_FOURCC ('M', 'P', '4', '3'):
caps = gst_caps_new_simple ("video/x-msmpeg",
"msmpegversion", G_TYPE_INT, 43, NULL);
if (codec_name)
*codec_name = g_strdup ("Microsoft MPEG-4 4.3");
break;
case GST_MAKE_FOURCC ('3', 'I', 'V', '1'):
case GST_MAKE_FOURCC ('3', 'I', 'V', '2'):
caps = gst_caps_new_simple ("video/x-3ivx", NULL);
if (codec_name)
*codec_name = g_strdup ("3ivx");
break;
case GST_MAKE_FOURCC ('D', 'V', 'S', 'D'):
case GST_MAKE_FOURCC ('d', 'v', 's', 'd'):
caps = gst_caps_new_simple ("video/x-dv",
"systemstream", G_TYPE_BOOLEAN, FALSE, NULL);
if (codec_name)
*codec_name = g_strdup ("Generic DV");
break;
case GST_MAKE_FOURCC ('W', 'M', 'V', '1'):
caps = gst_caps_new_simple ("video/x-wmv",
"wmvversion", G_TYPE_INT, 1, NULL);
if (codec_name)
*codec_name = g_strdup ("Microsoft Windows Media 7 (WMV1)");
break;
case GST_MAKE_FOURCC ('W', 'M', 'V', '2'):
caps = gst_caps_new_simple ("video/x-wmv",
"wmvversion", G_TYPE_INT, 2, NULL);
if (codec_name)
*codec_name = g_strdup ("Microsoft Windows Media 8 (WMV2)");
break;
case GST_MAKE_FOURCC ('W', 'M', 'V', '3'):
caps = gst_caps_new_simple ("video/x-wmv",
"wmvversion", G_TYPE_INT, 3, NULL);
if (codec_name)
*codec_name = g_strdup ("Microsoft Windows Media 9 (WMV3)");
break;
case GST_MAKE_FOURCC ('c', 'v', 'i', 'd'):
caps = gst_caps_new_simple ("video/x-cinepak", NULL);
if (codec_name)
*codec_name = g_strdup ("Cinepak video");
break;
case GST_MAKE_FOURCC ('M', 'S', 'V', 'C'):
case GST_MAKE_FOURCC ('m', 's', 'v', 'c'):
case GST_MAKE_FOURCC ('C', 'R', 'A', 'M'):
case GST_MAKE_FOURCC ('c', 'r', 'a', 'm'):
case GST_MAKE_FOURCC ('W', 'H', 'A', 'M'):
case GST_MAKE_FOURCC ('w', 'h', 'a', 'm'):
caps = gst_caps_new_simple ("video/x-msvideocodec",
"msvideoversion", G_TYPE_INT, 1, NULL);
if (codec_name)
*codec_name = g_strdup ("MS video v1");
break;
case GST_MAKE_FOURCC ('R', 'L', 'E', ' '):
case GST_MAKE_FOURCC ('m', 'r', 'l', 'e'):
case GST_MAKE_FOURCC (0x1, 0x0, 0x0, 0x0): /* why, why, why? */
caps = gst_caps_new_simple ("video/x-rle",
"layout", G_TYPE_STRING, "microsoft", NULL);
if (strf_data && GST_BUFFER_SIZE (strf_data) >= 256 * 4) {
GstBuffer *copy = gst_buffer_copy (strf_data);
GValue value = { 0 };
#if (G_BYTE_ORDER == G_BIG_ENDIAN)
gint n;
guint32 *data = (guint32 *) GST_BUFFER_DATA (copy);
/* own endianness */
for (n = 0; n < 256; n++)
data[n] = GUINT32_FROM_LE (data[n]);
#endif
g_value_init (&value, GST_TYPE_BUFFER);
g_value_set_boxed (&value, copy);
gst_structure_set_value (gst_caps_get_structure (caps, 0),
"palette_data", &value);
g_value_unset (&value);
gst_buffer_unref (copy);
}
if (strf) {
gst_caps_set_simple (caps,
"depth", G_TYPE_INT, (gint) strf->bit_cnt, NULL);
} else {
gst_caps_set_simple (caps, "depth", GST_TYPE_INT_RANGE, 1, 64, NULL);
}
if (codec_name)
*codec_name = g_strdup ("Mcrosoft RLE");
break;
default:
GST_WARNING ("Unknown video fourcc " GST_FOURCC_FORMAT,
GST_FOURCC_ARGS (codec_fcc));
return NULL;
}
if (strh != NULL) {
gdouble fps = 1. * strh->rate / strh->scale;
gst_caps_set_simple (caps, "framerate", G_TYPE_DOUBLE, fps, NULL);
} else {
gst_caps_set_simple (caps,
"framerate", GST_TYPE_DOUBLE_RANGE, 0., G_MAXDOUBLE, NULL);
}
if (strf != NULL) {
gst_caps_set_simple (caps,
"width", G_TYPE_INT, strf->width,
"height", G_TYPE_INT, strf->height, NULL);
} else {
gst_caps_set_simple (caps,
"width", GST_TYPE_INT_RANGE, 16, 4096,
"height", GST_TYPE_INT_RANGE, 16, 4096, NULL);
}
return caps;
}
GstCaps *
gst_riff_create_video_caps (guint32 codec_fcc,
gst_riff_strh * strh, gst_riff_strf_vids * strf, char **codec_name)
{
return gst_riff_create_video_caps_with_data (codec_fcc,
strh, strf, NULL, NULL, codec_name);
}
GstCaps *
gst_riff_create_audio_caps_with_data (guint16 codec_id,
gst_riff_strh * strh, gst_riff_strf_auds * strf,
GstBuffer * strf_data, GstBuffer * strd_data, char **codec_name)
{
gboolean block_align = FALSE, rate_chan = TRUE;
GstCaps *caps = NULL;
gint rate_min = 8000, rate_max = 96000;
gint channels_max = 2;
switch (codec_id) {
case GST_RIFF_WAVE_FORMAT_MPEGL3: /* mp3 */
caps = gst_caps_new_simple ("audio/mpeg",
"mpegversion", G_TYPE_INT, 1, "layer", G_TYPE_INT, 3, NULL);
if (codec_name)
*codec_name = g_strdup ("MPEG 1 layer 3");
break;
case GST_RIFF_WAVE_FORMAT_MPEGL12: /* mp1 or mp2 */
caps = gst_caps_new_simple ("audio/mpeg",
"mpegversion", G_TYPE_INT, 1, "layer", G_TYPE_INT, 2, NULL);
if (codec_name)
*codec_name = g_strdup ("MPEG 1 layer 2");
break;
case GST_RIFF_WAVE_FORMAT_PCM: /* PCM */
if (strf != NULL) {
gint ba = strf->blockalign;
gint ch = strf->channels;
gint ws = strf->size;
caps = gst_caps_new_simple ("audio/x-raw-int",
"endianness", G_TYPE_INT, G_LITTLE_ENDIAN,
"width", G_TYPE_INT, (int) (ba * 8 / ch),
"depth", G_TYPE_INT, ws, "signed", G_TYPE_BOOLEAN, ws != 8, NULL);
} else {
caps = gst_caps_from_string ("audio/x-raw-int, "
"endianness = (int) LITTLE_ENDIAN, "
"signed = (boolean) { true, false }, "
"width = (int) { 8, 16 }, " "depth = (int) { 8, 16 }");
}
if (codec_name)
*codec_name = g_strdup ("Uncompressed PCM audio");
break;
case GST_RIFF_WAVE_FORMAT_ADPCM:
caps = gst_caps_new_simple ("audio/x-adpcm",
"layout", G_TYPE_STRING, "microsoft", NULL);
if (codec_name)
*codec_name = g_strdup ("ADPCM audio");
block_align = TRUE;
break;
case GST_RIFF_WAVE_FORMAT_DVI_ADPCM:
caps = gst_caps_new_simple ("audio/x-adpcm",
"layout", G_TYPE_STRING, "dvi", NULL);
if (codec_name)
*codec_name = g_strdup ("DVI ADPCM audio");
block_align = TRUE;
break;
case GST_RIFF_WAVE_FORMAT_MULAW:
if (strf != NULL && strf->size != 8) {
GST_WARNING ("invalid depth (%d) of mulaw audio, overwriting.",
strf->size);
}
caps = gst_caps_new_simple ("audio/x-mulaw", NULL);
if (codec_name)
*codec_name = g_strdup ("Mulaw");
break;
case GST_RIFF_WAVE_FORMAT_ALAW:
if (strf != NULL && strf->size != 8) {
GST_WARNING ("invalid depth (%d) of alaw audio, overwriting.",
strf->size);
}
caps = gst_caps_new_simple ("audio/x-alaw", NULL);
if (codec_name)
*codec_name = g_strdup ("Alaw");
break;
case GST_RIFF_WAVE_FORMAT_VORBIS1: /* ogg/vorbis mode 1 */
case GST_RIFF_WAVE_FORMAT_VORBIS2: /* ogg/vorbis mode 2 */
case GST_RIFF_WAVE_FORMAT_VORBIS3: /* ogg/vorbis mode 3 */
case GST_RIFF_WAVE_FORMAT_VORBIS1PLUS: /* ogg/vorbis mode 1+ */
case GST_RIFF_WAVE_FORMAT_VORBIS2PLUS: /* ogg/vorbis mode 2+ */
case GST_RIFF_WAVE_FORMAT_VORBIS3PLUS: /* ogg/vorbis mode 3+ */
caps = gst_caps_new_simple ("audio/x-vorbis", NULL);
if (codec_name)
*codec_name = g_strdup ("Vorbis");
break;
case GST_RIFF_WAVE_FORMAT_A52:
channels_max = 6;
caps = gst_caps_new_simple ("audio/x-ac3", NULL);
if (codec_name)
*codec_name = g_strdup ("AC3");
break;
case GST_RIFF_WAVE_FORMAT_WMAV1:
case GST_RIFF_WAVE_FORMAT_WMAV2:
{
gint version = codec_id == GST_RIFF_WAVE_FORMAT_WMAV1 ? 1 : 2;
block_align = TRUE;
caps = gst_caps_new_simple ("audio/x-wma",
"wmaversion", G_TYPE_INT, version, NULL);
if (codec_name)
*codec_name = g_strdup_printf ("WMA Version %d", version);
if (strf != NULL) {
gst_caps_set_simple (caps,
"bitrate", G_TYPE_INT, strf->av_bps * 8, NULL);
} else {
gst_caps_set_simple (caps,
"bitrate", GST_TYPE_INT_RANGE, 0, G_MAXINT, NULL);
}
if (strf_data) {
gst_caps_set_simple (caps,
"codec_data", GST_TYPE_BUFFER, strf_data, NULL);
}
break;
}
default:
GST_WARNING ("Unknown audio tag 0x%04x", codec_id);
return NULL;
}
if (strf != NULL) {
if (rate_chan) {
gst_caps_set_simple (caps,
"rate", G_TYPE_INT, strf->rate,
"channels", G_TYPE_INT, strf->channels, NULL);
}
if (block_align) {
gst_caps_set_simple (caps,
"block_align", G_TYPE_INT, strf->blockalign, NULL);
}
} else {
if (rate_chan) {
gst_caps_set_simple (caps,
"rate", GST_TYPE_INT_RANGE, rate_min, rate_max,
"channels", GST_TYPE_INT_RANGE, 1, channels_max, NULL);
}
if (block_align) {
gst_caps_set_simple (caps,
"block_align", GST_TYPE_INT_RANGE, 1, 8192, NULL);
}
}
return caps;
}
GstCaps *
gst_riff_create_audio_caps (guint16 codec_id,
gst_riff_strh * strh, gst_riff_strf_auds * strf, char **codec_name)
{
return gst_riff_create_audio_caps_with_data (codec_id,
strh, strf, NULL, NULL, codec_name);
}
GstCaps *
gst_riff_create_iavs_caps (guint32 codec_fcc,
gst_riff_strh * strh, gst_riff_strf_iavs * strf, char **codec_name)
{
GstCaps *caps = NULL;
switch (codec_fcc) {
/* is this correct? */
case GST_MAKE_FOURCC ('D', 'V', 'S', 'D'):
case GST_MAKE_FOURCC ('d', 'v', 's', 'd'):
caps = gst_caps_new_simple ("video/x-dv",
"systemstream", G_TYPE_BOOLEAN, TRUE, NULL);
if (codec_name)
*codec_name = g_strdup ("Generic DV");
break;
default:
GST_WARNING ("Unknown IAVS fourcc " GST_FOURCC_FORMAT,
GST_FOURCC_ARGS (codec_fcc));
return NULL;
}
return caps;
}
/*
* Functions below are for template caps. All is variable.
*/
GstCaps *
gst_riff_create_video_template_caps (void)
{
guint32 tags[] = {
GST_MAKE_FOURCC ('I', '4', '2', '0'),
GST_MAKE_FOURCC ('Y', 'U', 'Y', '2'),
GST_MAKE_FOURCC ('M', 'J', 'P', 'G'),
GST_MAKE_FOURCC ('D', 'V', 'S', 'D'),
GST_MAKE_FOURCC ('W', 'M', 'V', '1'),
GST_MAKE_FOURCC ('W', 'M', 'V', '2'),
GST_MAKE_FOURCC ('M', 'P', 'G', '4'),
GST_MAKE_FOURCC ('M', 'P', '4', '2'),
GST_MAKE_FOURCC ('M', 'P', '4', '3'),
GST_MAKE_FOURCC ('H', 'F', 'Y', 'U'),
GST_MAKE_FOURCC ('D', 'I', 'V', '3'),
GST_MAKE_FOURCC ('M', 'P', 'E', 'G'),
GST_MAKE_FOURCC ('H', '2', '6', '3'),
GST_MAKE_FOURCC ('D', 'I', 'V', 'X'),
GST_MAKE_FOURCC ('D', 'X', '5', '0'),
GST_MAKE_FOURCC ('X', 'V', 'I', 'D'),
GST_MAKE_FOURCC ('3', 'I', 'V', '1'),
GST_MAKE_FOURCC ('c', 'v', 'i', 'd'),
GST_MAKE_FOURCC ('m', 's', 'v', 'c'),
GST_MAKE_FOURCC ('R', 'L', 'E', ' '),
/* FILL ME */
0
};
guint i;
GstCaps *caps, *one;
caps = gst_caps_new_empty ();
for (i = 0; tags[i] != 0; i++) {
one = gst_riff_create_video_caps (tags[i], NULL, NULL, NULL);
if (one)
gst_caps_append (caps, one);
}
return caps;
}
GstCaps *
gst_riff_create_audio_template_caps (void)
{
guint16 tags[] = {
GST_RIFF_WAVE_FORMAT_MPEGL3,
GST_RIFF_WAVE_FORMAT_MPEGL12,
GST_RIFF_WAVE_FORMAT_PCM,
GST_RIFF_WAVE_FORMAT_VORBIS1,
GST_RIFF_WAVE_FORMAT_A52,
GST_RIFF_WAVE_FORMAT_ALAW,
GST_RIFF_WAVE_FORMAT_MULAW,
GST_RIFF_WAVE_FORMAT_ADPCM,
GST_RIFF_WAVE_FORMAT_DVI_ADPCM,
GST_RIFF_WAVE_FORMAT_WMAV1,
GST_RIFF_WAVE_FORMAT_WMAV2,
/* FILL ME */
0
};
guint i;
GstCaps *caps, *one;
caps = gst_caps_new_empty ();
for (i = 0; tags[i] != 0; i++) {
one = gst_riff_create_audio_caps (tags[i], NULL, NULL, NULL);
if (one)
gst_caps_append (caps, one);
}
return caps;
}
GstCaps *
gst_riff_create_iavs_template_caps (void)
{
guint32 tags[] = {
GST_MAKE_FOURCC ('D', 'V', 'S', 'D'),
/* FILL ME */
0
};
guint i;
GstCaps *caps, *one;
caps = gst_caps_new_empty ();
for (i = 0; tags[i] != 0; i++) {
one = gst_riff_create_iavs_caps (tags[i], NULL, NULL, NULL);
if (one)
gst_caps_append (caps, one);
}
return caps;
}
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