/* GStreamer
* Copyright (C) 2003 Benjamin Otte <in7y118@public.uni-hamburg.de>
*
* gsttypefindfunctions.c: collection of various typefind functions
*
* 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
#ifdef __SYMBIAN32__
#include <gst_global.h>
#endif
#include <glib/gstrfuncs.h>
#include <gst/gsttypefind.h>
#include <gst/gstelement.h>
#include <gst/gstversion.h>
#include <gst/gstinfo.h>
#include <gst/gstutils.h>
#include <string.h>
#include <ctype.h>
#ifdef __SYMBIAN32__
#include <glib_global.h>
#endif
GST_DEBUG_CATEGORY_STATIC (type_find_debug);
#define GST_CAT_DEFAULT type_find_debug
/*** text/plain ***/
static gboolean xml_check_first_element (GstTypeFind * tf,
const gchar * element, guint elen, gboolean strict);
static gboolean sdp_check_header (GstTypeFind * tf);
static GstStaticCaps utf8_caps = GST_STATIC_CAPS ("text/plain");
#define UTF8_CAPS gst_static_caps_get(&utf8_caps)
static gboolean
utf8_type_find_have_valid_utf8_at_offset (GstTypeFind * tf, guint64 offset,
GstTypeFindProbability * prob)
{
guint8 *data;
/* randomly decided values */
guint min_size = 16; /* minimum size */
guint size = 32 * 1024; /* starting size */
guint probability = 95; /* starting probability */
guint step = 10; /* how much we reduce probability in each iteration */
while (probability > step && size > min_size) {
data = gst_type_find_peek (tf, offset, size);
if (data) {
gchar *end;
gchar *start = (gchar *) data;
if (g_utf8_validate (start, size, (const gchar **) &end) || (end - start + 4 > size)) { /* allow last char to be cut off */
*prob = probability;
return TRUE;
}
*prob = 0;
return FALSE;
}
size /= 2;
probability -= step;
}
*prob = 0;
return FALSE;
}
static void
utf8_type_find (GstTypeFind * tf, gpointer unused)
{
GstTypeFindProbability start_prob, mid_prob;
guint64 length;
/* leave xml to the xml typefinders */
if (xml_check_first_element (tf, "", 0, TRUE))
return;
/* leave sdp to the sdp typefinders */
if (sdp_check_header (tf))
return;
/* check beginning of stream */
if (!utf8_type_find_have_valid_utf8_at_offset (tf, 0, &start_prob))
return;
GST_LOG ("start is plain text with probability of %u", start_prob);
/* POSSIBLE is the highest probability we ever return if we can't
* probe into the middle of the file and don't know its length */
length = gst_type_find_get_length (tf);
if (length == 0 || length == (guint64) - 1) {
gst_type_find_suggest (tf, MIN (start_prob, GST_TYPE_FIND_POSSIBLE),
UTF8_CAPS);
return;
}
if (length < 64 * 1024) {
gst_type_find_suggest (tf, start_prob, UTF8_CAPS);
return;
}
/* check middle of stream */
if (!utf8_type_find_have_valid_utf8_at_offset (tf, length / 2, &mid_prob))
return;
GST_LOG ("middle is plain text with probability of %u", mid_prob);
gst_type_find_suggest (tf, (start_prob + mid_prob) / 2, UTF8_CAPS);
}
/*** text/uri-list ***/
static GstStaticCaps uri_caps = GST_STATIC_CAPS ("text/uri-list");
#define URI_CAPS (gst_static_caps_get(&uri_caps))
#define BUFFER_SIZE 16 /* If the string is < 16 bytes we're screwed */
#define INC_BUFFER { \
pos++; \
if (pos == BUFFER_SIZE) { \
pos = 0; \
offset += BUFFER_SIZE; \
data = gst_type_find_peek (tf, offset, BUFFER_SIZE); \
if (data == NULL) return; \
} else { \
data++; \
} \
}
static void
uri_type_find (GstTypeFind * tf, gpointer unused)
{
guint8 *data = gst_type_find_peek (tf, 0, BUFFER_SIZE);
guint pos = 0;
guint offset = 0;
if (data) {
/* Search for # comment lines */
while (*data == '#') {
/* Goto end of line */
while (*data != '\n') {
INC_BUFFER;
}
INC_BUFFER;
}
if (!g_ascii_isalpha (*data)) {
/* Had a non alpha char - can't be uri-list */
return;
}
INC_BUFFER;
while (g_ascii_isalnum (*data)) {
INC_BUFFER;
}
if (*data != ':') {
/* First non alpha char is not a : */
return;
}
/* Get the next 2 bytes as well */
data = gst_type_find_peek (tf, offset + pos, 3);
if (data == NULL)
return;
if (data[1] != '/' && data[2] != '/') {
return;
}
gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, URI_CAPS);
}
}
/*** application/xml **********************************************************/
#define XML_BUFFER_SIZE 16
#define XML_INC_BUFFER { \
pos++; \
if (pos == XML_BUFFER_SIZE) { \
pos = 0; \
offset += XML_BUFFER_SIZE; \
data = gst_type_find_peek (tf, offset, XML_BUFFER_SIZE); \
if (data == NULL) return FALSE; \
} else { \
data++; \
} \
}
static gboolean
xml_check_first_element (GstTypeFind * tf, const gchar * element, guint elen,
gboolean strict)
{
gboolean got_xmldec;
guint8 *data;
guint offset = 0;
guint pos = 0;
data = gst_type_find_peek (tf, 0, XML_BUFFER_SIZE);
if (!data)
return FALSE;
/* look for the XMLDec
* see XML spec 2.8, Prolog and Document Type Declaration
* http://www.w3.org/TR/2004/REC-xml-20040204/#sec-prolog-dtd */
got_xmldec = (memcmp (data, "<?xml", 5) == 0);
if (strict && !got_xmldec)
return FALSE;
/* skip XMLDec in any case if we've got one */
if (got_xmldec) {
pos += 5;
data += 5;
}
/* look for the first element, it has to be the requested element. Bail
* out if it is not within the first 4kB. */
while (data && (offset + pos) < 4096) {
while (*data != '<' && (offset + pos) < 4096) {
XML_INC_BUFFER;
}
XML_INC_BUFFER;
if (!g_ascii_isalpha (*data)) {
/* if not alphabetic, it's a PI or an element / attribute declaration
* like <?xxx or <!xxx */
XML_INC_BUFFER;
continue;
}
/* the first normal element, check if it's the one asked for */
data = gst_type_find_peek (tf, offset + pos, elen + 1);
return (data && element && strncmp ((char *) data, element, elen) == 0);
}
return FALSE;
}
static GstStaticCaps generic_xml_caps = GST_STATIC_CAPS ("application/xml");
#define GENERIC_XML_CAPS (gst_static_caps_get(&generic_xml_caps))
static void
xml_type_find (GstTypeFind * tf, gpointer unused)
{
if (xml_check_first_element (tf, "", 0, TRUE)) {
gst_type_find_suggest (tf, GST_TYPE_FIND_MINIMUM, GENERIC_XML_CAPS);
}
}
/*** application/sdp *********************************************************/
static GstStaticCaps sdp_caps = GST_STATIC_CAPS ("application/sdp");
#define SDP_CAPS (gst_static_caps_get(&sdp_caps))
static gboolean
sdp_check_header (GstTypeFind * tf)
{
guint8 *data;
data = gst_type_find_peek (tf, 0, 5);
if (!data)
return FALSE;
/* sdp must start with v=0[\r]\n */
if (memcmp (data, "v=0", 3))
return FALSE;
if (data[3] == '\r' && data[4] != '\n')
return FALSE;
if (data[3] != '\n')
return FALSE;
return TRUE;
}
static void
sdp_type_find (GstTypeFind * tf, gpointer unused)
{
if (sdp_check_header (tf))
gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, SDP_CAPS);
}
/*** application/smil *********************************************************/
static GstStaticCaps smil_caps = GST_STATIC_CAPS ("application/smil");
#define SMIL_CAPS (gst_static_caps_get(&smil_caps))
static void
smil_type_find (GstTypeFind * tf, gpointer unused)
{
if (xml_check_first_element (tf, "smil", 4, FALSE)) {
gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, SMIL_CAPS);
}
}
/*** text/html ***/
static GstStaticCaps html_caps = GST_STATIC_CAPS ("text/html");
#define HTML_CAPS gst_static_caps_get (&html_caps)
static void
html_type_find (GstTypeFind * tf, gpointer unused)
{
gchar *d, *data;
data = (gchar *) gst_type_find_peek (tf, 0, 16);
if (!data)
return;
if (!g_ascii_strncasecmp (data, "<!DOCTYPE HTML", 14)) {
gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, HTML_CAPS);
} else if (xml_check_first_element (tf, "html", 4, FALSE)) {
gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, HTML_CAPS);
} else if ((d = memchr (data, '<', 16))) {
data = (gchar *) gst_type_find_peek (tf, d - data, 6);
if (data && g_ascii_strncasecmp (data, "<html>", 6) == 0) {
gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, HTML_CAPS);
}
}
}
/*** audio/midi ***/
static GstStaticCaps mid_caps = GST_STATIC_CAPS ("audio/midi");
#define MID_CAPS gst_static_caps_get(&mid_caps)
static void
mid_type_find (GstTypeFind * tf, gpointer unused)
{
guint8 *data = gst_type_find_peek (tf, 0, 4);
/* http://jedi.ks.uiuc.edu/~johns/links/music/midifile.html */
if (data && data[0] == 'M' && data[1] == 'T' && data[2] == 'h'
&& data[3] == 'd')
gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, MID_CAPS);
}
/*** video/x-fli ***/
static GstStaticCaps flx_caps = GST_STATIC_CAPS ("video/x-fli");
#define FLX_CAPS gst_static_caps_get(&flx_caps)
static void
flx_type_find (GstTypeFind * tf, gpointer unused)
{
guint8 *data = gst_type_find_peek (tf, 0, 134);
if (data) {
/* check magic and the frame type of the first frame */
if ((data[4] == 0x11 || data[4] == 0x12 ||
data[4] == 0x30 || data[4] == 0x44) &&
data[5] == 0xaf &&
((data[132] == 0x00 || data[132] == 0xfa) && data[133] == 0xf1)) {
gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, FLX_CAPS);
}
return;
}
data = gst_type_find_peek (tf, 0, 6);
if (data) {
/* check magic only */
if ((data[4] == 0x11 || data[4] == 0x12 ||
data[4] == 0x30 || data[4] == 0x44) && data[5] == 0xaf) {
gst_type_find_suggest (tf, GST_TYPE_FIND_LIKELY, FLX_CAPS);
}
return;
}
}
/*** application/x-id3 ***/
static GstStaticCaps id3_caps = GST_STATIC_CAPS ("application/x-id3");
#define ID3_CAPS gst_static_caps_get(&id3_caps)
static void
id3v2_type_find (GstTypeFind * tf, gpointer unused)
{
guint8 *data = gst_type_find_peek (tf, 0, 10);
if (data && memcmp (data, "ID3", 3) == 0 &&
data[3] != 0xFF && data[4] != 0xFF &&
(data[6] & 0x80) == 0 && (data[7] & 0x80) == 0 &&
(data[8] & 0x80) == 0 && (data[9] & 0x80) == 0) {
gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, ID3_CAPS);
}
}
static void
id3v1_type_find (GstTypeFind * tf, gpointer unused)
{
guint8 *data = gst_type_find_peek (tf, -128, 3);
if (data && memcmp (data, "TAG", 3) == 0) {
gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, ID3_CAPS);
}
}
/*** application/x-ape ***/
static GstStaticCaps apetag_caps = GST_STATIC_CAPS ("application/x-apetag");
#define APETAG_CAPS gst_static_caps_get(&apetag_caps)
static void
apetag_type_find (GstTypeFind * tf, gpointer unused)
{
guint8 *data;
/* APEv1/2 at start of file */
data = gst_type_find_peek (tf, 0, 8);
if (data && !memcmp (data, "APETAGEX", 8)) {
gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, APETAG_CAPS);
return;
}
/* APEv1/2 at end of file */
data = gst_type_find_peek (tf, -32, 8);
if (data && !memcmp (data, "APETAGEX", 8)) {
gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, APETAG_CAPS);
return;
}
}
/*** audio/x-ttafile ***/
static GstStaticCaps tta_caps = GST_STATIC_CAPS ("audio/x-ttafile");
#define TTA_CAPS gst_static_caps_get(&tta_caps)
static void
tta_type_find (GstTypeFind * tf, gpointer unused)
{
guint8 *data = gst_type_find_peek (tf, 0, 3);
if (data) {
if (memcmp (data, "TTA", 3) == 0) {
gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, TTA_CAPS);
return;
}
}
}
/*** audio/x-flac ***/
static GstStaticCaps flac_caps = GST_STATIC_CAPS ("audio/x-flac");
#define FLAC_CAPS (gst_static_caps_get(&flac_caps))
static void
flac_type_find (GstTypeFind * tf, gpointer unused)
{
guint8 *data;
data = gst_type_find_peek (tf, 0, 5);
if (G_LIKELY (data)) {
/* standard flac */
if (memcmp (data, "fLaC", 4) == 0) {
gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, FLAC_CAPS);
}
/* flac-in-ogg, see http://flac.sourceforge.net/ogg_mapping.html */
else if (memcmp (data, "\177FLAC\001", 6) == 0) {
gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, FLAC_CAPS);
}
}
}
/*** audio/mpeg version 2, 4 ***/
static GstStaticCaps aac_caps = GST_STATIC_CAPS ("audio/mpeg, "
"mpegversion = (int) { 2, 4 }, framed = (bool) false");
#define AAC_CAPS (gst_static_caps_get(&aac_caps))
#define AAC_AMOUNT (4096)
static void
aac_type_find (GstTypeFind * tf, gpointer unused)
{
guint8 *data = gst_type_find_peek (tf, 0, AAC_AMOUNT);
gint snc;
/* detect adts header or adif header.
* The ADIF header is 4 bytes, that should be OK. The ADTS header, on
* the other hand, is 14 bits only, so we require one valid frame with
* again a valid syncpoint on the next one (28 bits) for certainty. We
* require 4 kB, which is quite a lot, since frames are generally 200-400
* bytes.
*/
if (data) {
gint n;
for (n = 0; n < AAC_AMOUNT - 3; n++) {
snc = GST_READ_UINT16_BE (&data[n]);
if ((snc & 0xfff6) == 0xfff0) {
/* ADTS header - find frame length */
gint len;
GST_DEBUG ("Found one ADTS syncpoint at offset 0x%x, tracing next...",
n);
if (AAC_AMOUNT - n < 5) {
GST_DEBUG ("Not enough data to parse ADTS header");
break;
}
len = ((data[n + 3] & 0x03) << 11) |
(data[n + 4] << 3) | ((data[n + 5] & 0xe0) >> 5);
if (n + len + 2 >= AAC_AMOUNT) {
GST_DEBUG ("Next frame is not within reach");
break;
} else if (len == 0) {
continue;
}
snc = GST_READ_UINT16_BE (&data[n + len]);
if ((snc & 0xfff6) == 0xfff0) {
gint mpegversion = (data[n + 1] & 0x08) ? 2 : 4;
GstCaps *caps = gst_caps_new_simple ("audio/mpeg",
"framed", G_TYPE_BOOLEAN, FALSE,
"mpegversion", G_TYPE_INT, mpegversion,
NULL);
gst_type_find_suggest (tf, GST_TYPE_FIND_LIKELY, caps);
gst_caps_unref (caps);
GST_DEBUG ("Found ADTS-%d syncpoint at offset 0x%x (framelen %u)",
mpegversion, n, len);
break;
}
GST_DEBUG ("No next frame found... (should be at 0x%x)", n + len);
} else if (!memcmp (&data[n], "ADIF", 4)) {
/* ADIF header */
GstCaps *caps = gst_caps_new_simple ("audio/mpeg",
"framed", G_TYPE_BOOLEAN, FALSE,
"mpegversion", G_TYPE_INT, 4,
NULL);
gst_type_find_suggest (tf, GST_TYPE_FIND_LIKELY, caps);
gst_caps_unref (caps);
}
}
}
}
/*** audio/mpeg version 1 ***/
/*
* The chance that random data is identified as a valid mp3 header is 63 / 2^18
* (0.024%) per try. This makes the function for calculating false positives
* 1 - (1 - ((63 / 2 ^18) ^ GST_MP3_TYPEFIND_MIN_HEADERS)) ^ buffersize)
* This has the following probabilities of false positives:
* datasize MIN_HEADERS
* (bytes) 1 2 3 4
* 4096 62.6% 0.02% 0% 0%
* 16384 98% 0.09% 0% 0%
* 1 MiB 100% 5.88% 0% 0%
* 1 GiB 100% 100% 1.44% 0%
* 1 TiB 100% 100% 100% 0.35%
* This means that the current choice (3 headers by most of the time 4096 byte
* buffers is pretty safe for now.
*
* The max. size of each frame is 1440 bytes, which means that for N frames to
* be detected, we need 1440 * GST_MP3_TYPEFIND_MIN_HEADERS + 3 bytes of data.
* Assuming we step into the stream right after the frame header, this
* means we need 1440 * (GST_MP3_TYPEFIND_MIN_HEADERS + 1) - 1 + 3 bytes
* of data (5762) to always detect any mp3.
*/
static const guint mp3types_bitrates[2][3][16] =
{ {{0, 32, 64, 96, 128, 160, 192, 224, 256, 288, 320, 352, 384, 416, 448,},
{0, 32, 48, 56, 64, 80, 96, 112, 128, 160, 192, 224, 256, 320, 384,},
{0, 32, 40, 48, 56, 64, 80, 96, 112, 128, 160, 192, 224, 256, 320,}},
{{0, 32, 48, 56, 64, 80, 96, 112, 128, 144, 160, 176, 192, 224, 256,},
{0, 8, 16, 24, 32, 40, 48, 56, 64, 80, 96, 112, 128, 144, 160,},
{0, 8, 16, 24, 32, 40, 48, 56, 64, 80, 96, 112, 128, 144, 160,}},
};
static const guint mp3types_freqs[3][3] = { {11025, 12000, 8000},
{22050, 24000, 16000},
{44100, 48000, 32000}
};
static inline guint
mp3_type_frame_length_from_header (guint32 header, guint * put_layer,
guint * put_channels, guint * put_bitrate, guint * put_samplerate,
gboolean * may_be_free_format, gint possible_free_framelen)
{
guint bitrate, layer, length, mode, samplerate, version, channels;
if ((header & 0xffe00000) != 0xffe00000)
return 0;
/* we don't need extension, copyright, original or
* emphasis for the frame length */
header >>= 6;
/* mode */
mode = header & 0x3;
header >>= 3;
/* padding */
length = header & 0x1;
header >>= 1;
/* sampling frequency */
samplerate = header & 0x3;
if (samplerate == 3)
return 0;
header >>= 2;
/* bitrate index */
bitrate = header & 0xF;
if (bitrate == 0 && possible_free_framelen == -1) {
GST_LOG ("Possibly a free format mp3 - signalling");
*may_be_free_format = TRUE;
}
if (bitrate == 15 || (bitrate == 0 && possible_free_framelen == -1))
return 0;
/* ignore error correction, too */
header >>= 5;
/* layer */
layer = 4 - (header & 0x3);
if (layer == 4)
return 0;
header >>= 2;
/* version 0=MPEG2.5; 2=MPEG2; 3=MPEG1 */
version = header & 0x3;
if (version == 1)
return 0;
/* lookup */
channels = (mode == 3) ? 1 : 2;
samplerate = mp3types_freqs[version > 0 ? version - 1 : 0][samplerate];
if (bitrate == 0) {
if (layer == 1) {
length *= 4;
length += possible_free_framelen;
bitrate = length * samplerate / 48000;
} else {
length += possible_free_framelen;
bitrate = length * samplerate /
((layer == 3 && version != 3) ? 72000 : 144000);
}
} else {
/* calculating */
bitrate = mp3types_bitrates[version == 3 ? 0 : 1][layer - 1][bitrate];
if (layer == 1) {
length = ((12000 * bitrate / samplerate) + length) * 4;
} else {
length += ((layer == 3
&& version != 3) ? 72000 : 144000) * bitrate / samplerate;
}
}
GST_LOG ("mp3typefind: calculated mp3 frame length of %u bytes", length);
GST_LOG
("mp3typefind: samplerate = %u - bitrate = %u - layer = %u - version = %u"
" - channels = %u", samplerate, bitrate, layer, version, channels);
if (put_layer)
*put_layer = layer;
if (put_channels)
*put_channels = channels;
if (put_bitrate)
*put_bitrate = bitrate;
if (put_samplerate)
*put_samplerate = samplerate;
return length;
}
static GstStaticCaps mp3_caps = GST_STATIC_CAPS ("audio/mpeg, "
"mpegversion = (int) 1, layer = (int) [ 1, 3 ]");
#define MP3_CAPS (gst_static_caps_get(&mp3_caps))
/*
* random values for typefinding
* if no more data is available, we will return a probability of
* (found_headers/TRY_HEADERS) * (MAXIMUM * (TRY_SYNC - bytes_skipped)
* / TRY_SYNC)
* if found_headers >= MIN_HEADERS
*/
#define GST_MP3_TYPEFIND_MIN_HEADERS (2)
#define GST_MP3_TYPEFIND_TRY_HEADERS (5)
#define GST_MP3_TYPEFIND_TRY_SYNC (GST_TYPE_FIND_MAXIMUM * 100) /* 10kB */
#define GST_MP3_TYPEFIND_SYNC_SIZE (2048)
#define GST_MP3_WRONG_HEADER (10)
static void
mp3_type_find_at_offset (GstTypeFind * tf, guint64 start_off,
guint * found_layer, GstTypeFindProbability * found_prob)
{
guint8 *data = NULL;
guint8 *data_end = NULL;
guint size;
guint64 skipped;
gint last_free_offset = -1;
gint last_free_framelen = -1;
gboolean headerstart = TRUE;
*found_layer = 0;
*found_prob = 0;
size = 0;
skipped = 0;
while (skipped < GST_MP3_TYPEFIND_TRY_SYNC) {
if (size <= 0) {
size = GST_MP3_TYPEFIND_SYNC_SIZE * 2;
do {
size /= 2;
data = gst_type_find_peek (tf, skipped + start_off, size);
} while (size > 10 && !data);
if (!data)
break;
data_end = data + size;
}
if (*data == 0xFF) {
guint8 *head_data = NULL;
guint layer = 0, bitrate, samplerate, channels;
guint found = 0; /* number of valid headers found */
guint64 offset = skipped;
while (found < GST_MP3_TYPEFIND_TRY_HEADERS) {
guint32 head;
guint length;
guint prev_layer = 0, prev_bitrate = 0;
guint prev_channels = 0, prev_samplerate = 0;
gboolean free = FALSE;
if ((gint64) (offset - skipped + 4) >= 0 &&
data + offset - skipped + 4 < data_end) {
head_data = data + offset - skipped;
} else {
head_data = gst_type_find_peek (tf, offset + start_off, 4);
}
if (!head_data)
break;
head = GST_READ_UINT32_BE (head_data);
if (!(length = mp3_type_frame_length_from_header (head, &layer,
&channels, &bitrate, &samplerate, &free,
last_free_framelen))) {
if (free) {
if (last_free_offset == -1)
last_free_offset = offset;
else {
last_free_framelen = offset - last_free_offset;
offset = last_free_offset;
continue;
}
} else {
last_free_framelen = -1;
}
/* Mark the fact that we didn't find a valid header at the beginning */
if (found == 0)
headerstart = FALSE;
GST_LOG ("%d. header at offset %" G_GUINT64_FORMAT
" (0x%" G_GINT64_MODIFIER "x) was not an mp3 header "
"(possibly-free: %s)", found + 1, start_off + offset,
start_off + offset, free ? "yes" : "no");
break;
}
if ((prev_layer && prev_layer != layer) ||
/* (prev_bitrate && prev_bitrate != bitrate) || <-- VBR */
(prev_samplerate && prev_samplerate != samplerate) ||
(prev_channels && prev_channels != channels)) {
/* this means an invalid property, or a change, which might mean
* that this is not a mp3 but just a random bytestream. It could
* be a freaking funky encoded mp3 though. We'll just not count
* this header*/
prev_layer = layer;
prev_bitrate = bitrate;
prev_channels = channels;
prev_samplerate = samplerate;
} else {
found++;
GST_LOG ("found %d. header at offset %" G_GUINT64_FORMAT " (0x%"
G_GINT64_MODIFIER "X)", found, start_off + offset,
start_off + offset);
}
offset += length;
}
g_assert (found <= GST_MP3_TYPEFIND_TRY_HEADERS);
if (found == GST_MP3_TYPEFIND_TRY_HEADERS ||
(found >= GST_MP3_TYPEFIND_MIN_HEADERS && head_data == NULL)) {
/* we can make a valid guess */
guint probability = found * GST_TYPE_FIND_MAXIMUM *
(GST_MP3_TYPEFIND_TRY_SYNC - skipped) /
GST_MP3_TYPEFIND_TRY_HEADERS / GST_MP3_TYPEFIND_TRY_SYNC;
if (!headerstart
&& probability > (GST_TYPE_FIND_MINIMUM + GST_MP3_WRONG_HEADER))
probability -= GST_MP3_WRONG_HEADER;
if (probability < GST_TYPE_FIND_MINIMUM)
probability = GST_TYPE_FIND_MINIMUM;
if (start_off > 0)
probability /= 2;
GST_INFO
("audio/mpeg calculated %u = %u * %u / %u * (%u - %"
G_GUINT64_FORMAT ") / %u", probability, GST_TYPE_FIND_MAXIMUM,
found, GST_MP3_TYPEFIND_TRY_HEADERS, GST_MP3_TYPEFIND_TRY_SYNC,
(guint64) skipped, GST_MP3_TYPEFIND_TRY_SYNC);
/* make sure we're not id3 tagged */
head_data = gst_type_find_peek (tf, -128, 3);
if (head_data && (memcmp (head_data, "TAG", 3) == 0)) {
probability = 0;
}
g_assert (probability <= GST_TYPE_FIND_MAXIMUM);
*found_prob = probability;
if (probability > 0)
*found_layer = layer;
return;
}
}
data++;
skipped++;
size--;
}
}
static void
mp3_type_find (GstTypeFind * tf, gpointer unused)
{
GstTypeFindProbability prob, mid_prob;
guint8 *data;
guint layer, mid_layer;
guint64 length;
mp3_type_find_at_offset (tf, 0, &layer, &prob);
length = gst_type_find_get_length (tf);
if (length == 0 || length == (guint64) - 1) {
if (prob != 0)
goto suggest;
return;
}
/* if we're pretty certain already, skip the additional check */
if (prob >= GST_TYPE_FIND_LIKELY)
goto suggest;
mp3_type_find_at_offset (tf, length / 2, &mid_layer, &mid_prob);
if (mid_prob > 0) {
if (prob == 0) {
GST_LOG ("detected audio/mpeg only in the middle (p=%u)", mid_prob);
layer = mid_layer;
prob = mid_prob;
goto suggest;
}
if (layer != mid_layer) {
GST_WARNING ("audio/mpeg layer discrepancy: %u vs. %u", layer, mid_layer);
return; /* FIXME: or should we just go with the one in the middle? */
}
/* detected mpeg audio both in middle of the file and at the start */
prob = (prob + mid_prob) / 2;
goto suggest;
}
/* let's see if there's a valid header right at the start */
data = gst_type_find_peek (tf, 0, 4); /* use min. frame size? */
if (data && mp3_type_frame_length_from_header (GST_READ_UINT32_BE (data),
&layer, NULL, NULL, NULL, NULL, 0) != 0) {
if (prob == 0)
prob = GST_TYPE_FIND_POSSIBLE - 10;
else
prob = MAX (GST_TYPE_FIND_POSSIBLE - 10, prob + 10);
}
if (prob > 0)
goto suggest;
return;
suggest:
{
GstCaps *caps;
g_assert (layer > 0);
caps = gst_caps_make_writable (MP3_CAPS);
gst_structure_set (gst_caps_get_structure (caps, 0), "layer",
G_TYPE_INT, layer, NULL);
gst_type_find_suggest (tf, prob, caps);
gst_caps_unref (caps);
return;
}
}
/*** audio/x-musepack ***/
static GstStaticCaps musepack_caps = GST_STATIC_CAPS ("audio/x-musepack");
#define MUSEPACK_CAPS (gst_static_caps_get(&musepack_caps))
static void
musepack_type_find (GstTypeFind * tf, gpointer unused)
{
guint8 *data = gst_type_find_peek (tf, 0, 4);
if (data && memcmp (data, "MP+", 3) == 0) {
if ((data[3] & 0x7f) == 7) {
gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, MUSEPACK_CAPS);
} else {
gst_type_find_suggest (tf, GST_TYPE_FIND_LIKELY + 10, MUSEPACK_CAPS);
}
}
}
/*** audio/x-ac3 ***/
/* This should be audio/ac3, but isn't for backwards compatibility */
static GstStaticCaps ac3_caps = GST_STATIC_CAPS ("audio/x-ac3");
#define AC3_CAPS (gst_static_caps_get(&ac3_caps))
struct ac3_frmsize
{
unsigned short bit_rate;
unsigned short frm_size[3];
};
static const struct ac3_frmsize ac3_frmsizecod_tbl[] = {
{32, {64, 69, 96}},
{32, {64, 70, 96}},
{40, {80, 87, 120}},
{40, {80, 88, 120}},
{48, {96, 104, 144}},
{48, {96, 105, 144}},
{56, {112, 121, 168}},
{56, {112, 122, 168}},
{64, {128, 139, 192}},
{64, {128, 140, 192}},
{80, {160, 174, 240}},
{80, {160, 175, 240}},
{96, {192, 208, 288}},
{96, {192, 209, 288}},
{112, {224, 243, 336}},
{112, {224, 244, 336}},
{128, {256, 278, 384}},
{128, {256, 279, 384}},
{160, {320, 348, 480}},
{160, {320, 349, 480}},
{192, {384, 417, 576}},
{192, {384, 418, 576}},
{224, {448, 487, 672}},
{224, {448, 488, 672}},
{256, {512, 557, 768}},
{256, {512, 558, 768}},
{320, {640, 696, 960}},
{320, {640, 697, 960}},
{384, {768, 835, 1152}},
{384, {768, 836, 1152}},
{448, {896, 975, 1344}},
{448, {896, 976, 1344}},
{512, {1024, 1114, 1536}},
{512, {1024, 1115, 1536}},
{576, {1152, 1253, 1728}},
{576, {1152, 1254, 1728}},
{640, {1280, 1393, 1920}},
{640, {1280, 1394, 1920}}
};
static void
ac3_type_find (GstTypeFind * tf, gpointer unused)
{
guint8 *data = gst_type_find_peek (tf, 0, 5);
gint offset = 0;
/* Search for an ac3 frame; not neccesarily right at the start, but give it
* a lower probability if not found right at the start. Check that the
* frame is followed by a second frame at the expected offset.
* We could also check the two ac3 CRCs, but we don't do that right now */
while (data && offset < 1024) {
if (data[0] == 0x0b && data[1] == 0x77) {
guint fscod = (data[4] >> 6) & 0x03;
guint frmsizecod = data[4] & 0x3f;
if (fscod < 3 && frmsizecod < 38) {
guint frame_size = ac3_frmsizecod_tbl[frmsizecod].frm_size[fscod];
data = gst_type_find_peek (tf, offset + frame_size * 2, 5);
if (data) {
if (data[0] == 0x0b && data[1] == 0x77) {
guint fscod2 = (data[4] >> 6) & 0x03;
guint frmsizecod2 = data[4] & 0x3f;
if (fscod == fscod2 && frmsizecod == frmsizecod2) {
int prob;
if (offset == 0)
prob = GST_TYPE_FIND_MAXIMUM;
else
prob = GST_TYPE_FIND_NEARLY_CERTAIN;
gst_type_find_suggest (tf, prob, AC3_CAPS);
}
}
}
}
}
offset++;
data = gst_type_find_peek (tf, offset, 5);
}
}
/*** wavpack ***/
static GstStaticCaps wavpack_caps =
GST_STATIC_CAPS ("audio/x-wavpack, framed = (boolean) false");
#define WAVPACK_CAPS (gst_static_caps_get(&wavpack_caps))
static GstStaticCaps wavpack_correction_caps =
GST_STATIC_CAPS ("audio/x-wavpack-correction, framed = (boolean) false");
#define WAVPACK_CORRECTION_CAPS (gst_static_caps_get(&wavpack_correction_caps))
static void
wavpack_type_find (GstTypeFind * tf, gpointer unused)
{
guint64 offset;
guint32 blocksize;
guint8 *data;
data = gst_type_find_peek (tf, 0, 32);
if (!data)
return;
if (data[0] != 'w' || data[1] != 'v' || data[2] != 'p' || data[3] != 'k')
return;
/* Note: wavpack blocks can be fairly large (easily 60-110k), possibly
* larger than the max. limits imposed by certain typefinding elements
* like id3demux or apedemux, so typefinding is most likely only going to
* work in pull-mode */
blocksize = GST_READ_UINT32_LE (data + 4);
GST_LOG ("wavpack header, blocksize=0x%04x", blocksize);
offset = 32;
while (offset < 32 + blocksize) {
guint32 sublen;
/* get chunk header */
GST_LOG ("peeking at chunk at offset 0x%04x", (guint) offset);
data = gst_type_find_peek (tf, offset, 4);
if (data == NULL)
break;
sublen = ((guint32) data[1]) << 1;
if (data[0] & 0x80) {
sublen |= (((guint32) data[2]) << 9) | (((guint32) data[3]) << 17);
sublen += 1 + 3; /* id + length */
} else {
sublen += 1 + 1; /* id + length */
}
if (sublen > blocksize - offset + 32) {
GST_LOG ("chunk length too big (%u > %" G_GUINT64_FORMAT ")", sublen,
blocksize - offset);
break;
}
if ((data[0] & 0x20) == 0) {
switch (data[0] & 0x0f) {
case 0xa: /* ID_WV_BITSTREAM */
case 0xc: /* ID_WVX_BITSTREAM */
gst_type_find_suggest (tf, GST_TYPE_FIND_LIKELY, WAVPACK_CAPS);
return;
case 0xb: /* ID_WVC_BITSTREAM */
gst_type_find_suggest (tf, GST_TYPE_FIND_LIKELY,
WAVPACK_CORRECTION_CAPS);
return;
default:
break;
}
}
offset += sublen;
}
}
/*** multipart/x-mixed-replace mimestream ***/
static GstStaticCaps multipart_caps =
GST_STATIC_CAPS ("multipart/x-mixed-replace");
#define MULTIPART_CAPS gst_static_caps_get(&multipart_caps)
/* multipart/x-mixed replace is:
* <maybe some whitespace>--<some ascii chars>[\r]\n
* <more ascii chars>[\r]\nContent-type:<more ascii>[\r]\n */
static void
multipart_type_find (GstTypeFind * tf, gpointer unused)
{
guint8 *data;
guint8 *x;
#define MULTIPART_MAX_BOUNDARY_OFFSET 16
data = gst_type_find_peek (tf, 0, MULTIPART_MAX_BOUNDARY_OFFSET);
if (!data)
return;
for (x = data;
x - data < MULTIPART_MAX_BOUNDARY_OFFSET - 2 && g_ascii_isspace (*x);
x++);
if (x[0] != '-' || x[1] != '-')
return;
/* Could be okay, peek what should be enough for a complete header */
#define MULTIPART_MAX_HEADER_SIZE 256
data = gst_type_find_peek (tf, 0, MULTIPART_MAX_HEADER_SIZE);
if (!data)
return;
for (x = data; x - data < MULTIPART_MAX_HEADER_SIZE - 14; x++) {
if (!isascii (*x)) {
return;
}
if (*x == '\n' &&
!g_ascii_strncasecmp ("content-type:", (gchar *) x + 1, 13)) {
GstCaps *caps = gst_caps_copy (MULTIPART_CAPS);
gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, caps);
gst_caps_unref (caps);
return;
}
}
}
/*** video/mpeg systemstream ***/
static GstStaticCaps mpeg_sys_caps = GST_STATIC_CAPS ("video/mpeg, "
"systemstream = (boolean) true, mpegversion = (int) [ 1, 2 ]");
#define MPEG_SYS_CAPS gst_static_caps_get(&mpeg_sys_caps)
#define IS_MPEG_HEADER(data) ((((guint8 *)(data))[0] == 0x00) && \
(((guint8 *)(data))[1] == 0x00) && \
(((guint8 *)(data))[2] == 0x01))
#define IS_MPEG_PACK_CODE(b) ((b) == 0xBA)
#define IS_MPEG_SYS_CODE(b) ((b) == 0xBB)
#define IS_MPEG_PACK_HEADER(data) (IS_MPEG_HEADER (data) && \
IS_MPEG_PACK_CODE (((guint8 *)(data))[3]))
#define IS_MPEG_PES_CODE(b) (((b) & 0xF0) == 0xE0 || ((b) & 0xF0) == 0xC0 || \
(b) >= 0xBD)
#define IS_MPEG_PES_HEADER(data) (IS_MPEG_HEADER (data) && \
IS_MPEG_PES_CODE (((guint8 *)(data))[3]))
#define MPEG2_MAX_PROBE_LENGTH (128 * 1024) /* 128kB should be 64 packs of the
* most common 2kB pack size. */
#define MPEG2_MIN_SYS_HEADERS 2
#define MPEG2_MAX_SYS_HEADERS 5
static gboolean
mpeg_sys_is_valid_pack (GstTypeFind * tf, guint8 * data, guint len,
guint * pack_size)
{
/* Check the pack header @ offset for validity, assuming that the 4 byte header
* itself has already been checked. */
guint8 stuff_len;
if (len < 12)
return FALSE;
/* Check marker bits */
if ((data[4] & 0xC4) == 0x44) {
/* MPEG-2 PACK */
if (len < 14)
return FALSE;
if ((data[6] & 0x04) != 0x04 ||
(data[8] & 0x04) != 0x04 ||
(data[9] & 0x01) != 0x01 || (data[12] & 0x03) != 0x03)
return FALSE;
stuff_len = data[13] & 0x07;
/* Check the following header bytes, if we can */
if ((14 + stuff_len + 4) <= len) {
if (!IS_MPEG_HEADER (data + 14 + stuff_len))
return FALSE;
}
if (pack_size)
*pack_size = 14 + stuff_len;
return TRUE;
} else if ((data[4] & 0xF1) == 0x21) {
/* MPEG-1 PACK */
if ((data[6] & 0x01) != 0x01 ||
(data[8] & 0x01) != 0x01 ||
(data[9] & 0x80) != 0x80 || (data[11] & 0x01) != 0x01)
return FALSE;
/* Check the following header bytes, if we can */
if ((12 + 4) <= len) {
if (!IS_MPEG_HEADER (data + 12))
return FALSE;
}
if (pack_size)
*pack_size = 12;
return TRUE;
}
return FALSE;
}
static gboolean
mpeg_sys_is_valid_pes (GstTypeFind * tf, guint8 * data, guint len,
guint * pack_size)
{
guint pes_packet_len;
/* Check the PES header at the given position, assuming the header code itself
* was already checked */
if (len < 6)
return FALSE;
/* For MPEG Program streams, unbounded PES is not allowed, so we must have a
* valid length present */
pes_packet_len = GST_READ_UINT16_BE (data + 4);
if (pes_packet_len == 0)
return FALSE;
/* Check the following header, if we can */
if (6 + pes_packet_len + 4 <= len) {
if (!IS_MPEG_HEADER (data + 6 + pes_packet_len))
return FALSE;
}
if (pack_size)
*pack_size = 6 + pes_packet_len;
return TRUE;
}
static gboolean
mpeg_sys_is_valid_sys (GstTypeFind * tf, guint8 * data, guint len,
guint * pack_size)
{
guint sys_hdr_len;
/* Check the System header at the given position, assuming the header code itself
* was already checked */
if (len < 6)
return FALSE;
sys_hdr_len = GST_READ_UINT16_BE (data + 4);
if (sys_hdr_len < 6)
return FALSE;
/* Check the following header, if we can */
if (6 + sys_hdr_len + 4 <= len) {
if (!IS_MPEG_HEADER (data + 6 + sys_hdr_len))
return FALSE;
}
if (pack_size)
*pack_size = 6 + sys_hdr_len;
return TRUE;
}
/* calculation of possibility to identify random data as mpeg systemstream:
* bits that must match in header detection: 32 (or more)
* chance that random data is identifed: 1/2^32
* chance that MPEG2_MIN_PACK_HEADERS headers are identified:
* 1/2^(32*MPEG2_MIN_PACK_HEADERS)
* chance that this happens in MPEG2_MAX_PROBE_LENGTH bytes:
* 1-(1+1/2^(32*MPEG2_MIN_PACK_HEADERS)^MPEG2_MAX_PROBE_LENGTH)
* for current values:
* 1-(1+1/2^(32*4)^101024)
* = <some_number>
* Since we also check marker bits and pes packet lengths, this probability is a
* very coarse upper bound.
*/
static void
mpeg_sys_type_find (GstTypeFind * tf, gpointer unused)
{
guint8 *data, *data0, *first_sync, *end;
gint mpegversion = 0;
guint pack_headers = 0;
guint pes_headers = 0;
guint pack_size;
guint since_last_sync = 0;
guint32 sync_word = 0xffffffff;
G_STMT_START {
gint len;
len = MPEG2_MAX_PROBE_LENGTH;
do {
len = len / 2;
data = gst_type_find_peek (tf, 0, 5 + len);
} while (data == NULL && len >= 32);
if (!data)
return;
end = data + len;
}
G_STMT_END;
data0 = data;
first_sync = NULL;
while (data < end) {
sync_word <<= 8;
if (sync_word == 0x00000100) {
/* Found potential sync word */
if (first_sync == NULL)
first_sync = data - 3;
if (since_last_sync > 4) {
/* If more than 4 bytes since the last sync word, reset our counters,
* as we're only interested in counting contiguous packets */
pes_headers = pack_headers = 0;
}
pack_size = 0;
if (IS_MPEG_PACK_CODE (data[0])) {
if ((data[1] & 0xC0) == 0x40) {
/* MPEG-2 */
mpegversion = 2;
} else if ((data[1] & 0xF0) == 0x20) {
mpegversion = 1;
}
if (mpegversion != 0 &&
mpeg_sys_is_valid_pack (tf, data - 3, end - data + 3, &pack_size)) {
pack_headers++;
}
} else if (IS_MPEG_PES_CODE (data[0])) {
/* PES stream */
if (mpeg_sys_is_valid_pes (tf, data - 3, end - data + 3, &pack_size)) {
pes_headers++;
if (mpegversion == 0)
mpegversion = 2;
}
} else if (IS_MPEG_SYS_CODE (data[0])) {
if (mpeg_sys_is_valid_sys (tf, data - 3, end - data + 3, &pack_size)) {
pack_headers++;
}
}
/* If we found a packet with a known size, skip the bytes in it and loop
* around to check the next packet. */
if (pack_size != 0) {
data += pack_size - 3;
sync_word = 0xffffffff;
since_last_sync = 0;
continue;
}
}
sync_word |= data[0];
since_last_sync++;
data++;
/* If we have found MAX headers, and *some* were pes headers (pack headers
* are optional in an mpeg system stream) then return our high-probability
* result */
if (pes_headers > 0 && (pack_headers + pes_headers) > MPEG2_MAX_SYS_HEADERS)
goto suggest;
}
/* If we at least saw MIN headers, and *some* were pes headers (pack headers
* are optional in an mpeg system stream) then return a lower-probability
* result */
if (pes_headers > 0 && (pack_headers + pes_headers) > MPEG2_MIN_SYS_HEADERS)
goto suggest;
return;
suggest:
{
GstCaps *caps = gst_caps_copy (MPEG_SYS_CAPS);
guint prob;
prob = GST_TYPE_FIND_POSSIBLE + (10 * (pack_headers + pes_headers));
prob = MIN (prob, GST_TYPE_FIND_MAXIMUM);
/* lower probability if the first packet wasn't right at the start */
if (data0 != first_sync && prob >= 10)
prob -= 10;
GST_LOG ("Suggesting MPEG %d system stream, %d packs, %d pes, prob %u%%\n",
mpegversion, pack_headers, pes_headers, prob);
gst_structure_set (gst_caps_get_structure (caps, 0), "mpegversion",
G_TYPE_INT, mpegversion, NULL);
gst_type_find_suggest (tf, prob, caps);
gst_caps_unref (caps);
}
};
/** video/mpegts Transport Stream **/
static GstStaticCaps mpegts_caps = GST_STATIC_CAPS ("video/mpegts, "
"systemstream = (boolean) true, packetsize = (int) [ 188, 208 ]");
#define MPEGTS_CAPS gst_static_caps_get(&mpegts_caps)
#define GST_MPEGTS_TYPEFIND_MIN_HEADERS 4
#define GST_MPEGTS_TYPEFIND_MAX_HEADERS 10
#define GST_MPEGTS_MAX_PACKET_SIZE 208
#define GST_MPEGTS_TYPEFIND_SYNC_SIZE \
(GST_MPEGTS_TYPEFIND_MIN_HEADERS * GST_MPEGTS_MAX_PACKET_SIZE)
#define GST_MPEGTS_TYPEFIND_MAX_SYNC \
(GST_MPEGTS_TYPEFIND_MAX_HEADERS * GST_MPEGTS_MAX_PACKET_SIZE)
#define MPEGTS_HDR_SIZE 4
/* Check for sync byte, error_indicator == 0 and packet has payload */
#define IS_MPEGTS_HEADER(data) (((data)[0] == 0x47) && \
(((data)[1] & 0x80) == 0x00) && \
(((data)[3] & 0x10) == 0x10))
/* Helper function to search ahead at intervals of packet_size for mpegts
* headers */
static gint
mpeg_ts_probe_headers (GstTypeFind * tf, guint64 offset, gint packet_size)
{
/* We always enter this function having found at least one header already */
gint found = 1;
guint8 *data = NULL;
while (found < GST_MPEGTS_TYPEFIND_MAX_HEADERS) {
offset += packet_size;
data = gst_type_find_peek (tf, offset, MPEGTS_HDR_SIZE);
if (data == NULL || !IS_MPEGTS_HEADER (data))
return found;
found++;
}
return found;
}
/* Try and detect at least 4 packets in at most 10 packets worth of
* data. Need to try several possible packet sizes */
static void
mpeg_ts_type_find (GstTypeFind * tf, gpointer unused)
{
/* TS packet sizes to test: normal, DVHS packet size and
* FEC with 16 or 20 byte codes packet size. */
const gint pack_sizes[] = { 188, 192, 204, 208 };
const gint n_pack_sizes = sizeof (pack_sizes) / sizeof (gint);
guint8 *data = NULL;
guint size = 0;
guint64 skipped = 0;
while (skipped < GST_MPEGTS_TYPEFIND_MAX_SYNC) {
if (size < MPEGTS_HDR_SIZE) {
data = gst_type_find_peek (tf, skipped, GST_MPEGTS_TYPEFIND_SYNC_SIZE);
if (!data)
break;
size = GST_MPEGTS_TYPEFIND_SYNC_SIZE;
}
/* Have at least MPEGTS_HDR_SIZE bytes at this point */
if (IS_MPEGTS_HEADER (data)) {
gint p;
for (p = 0; p < n_pack_sizes; p++) {
gint found;
/* Probe ahead at size pack_sizes[p] */
found = mpeg_ts_probe_headers (tf, skipped, pack_sizes[p]);
if (found >= GST_MPEGTS_TYPEFIND_MIN_HEADERS) {
gint probability;
GstCaps *caps = gst_caps_copy (MPEGTS_CAPS);
gst_structure_set (gst_caps_get_structure (caps, 0), "packetsize",
G_TYPE_INT, pack_sizes[p], NULL);
/* found at least 4 headers. 10 headers = MAXIMUM probability.
* Arbitrarily, I assigned 10% probability for each header we
* found, 40% -> 100% */
probability = MIN (10 * found, GST_TYPE_FIND_MAXIMUM);
gst_type_find_suggest (tf, probability, caps);
gst_caps_unref (caps);
return;
}
}
}
data++;
skipped++;
size--;
}
}
/*** video/mpeg MPEG-4 elementary video stream ***/
static GstStaticCaps mpeg4_video_caps = GST_STATIC_CAPS ("video/mpeg, "
"systemstream = (boolean) false, mpegversion = 4");
#define MPEG4_VIDEO_CAPS gst_static_caps_get(&mpeg4_video_caps)
static void
mpeg4_video_type_find (GstTypeFind * tf, gpointer unused)
{
/* Header consists of: a series of start codes (00 00 01 xx), some with
* associated data.
* Optionally, we start with a visual_object_sequence_start_code, followed by
* (optionally) visual_object_start_code), then the mandatory
* video_object_start_code and video_object_layer_start_code)
*/
guint8 *data = NULL;
int offset = 0;
gboolean seen_vos = FALSE;
while (TRUE) {
data = gst_type_find_peek (tf, offset, 4);
if (data && IS_MPEG_HEADER (data)) {
int sc = data[3];
if (sc == 0xB0) /* visual_object_sequence_start_code */
offset += 5;
else if (sc == 0xB5) /* visual_object_start_code */
offset += 5;
else if (sc >= 0x00 && sc <= 0x1F) { /* video_object_start_code */
offset += 4;
seen_vos = TRUE;
} else if (sc >= 0x20 && sc <= 0x2F) { /* video_object_layer_start_code */
if (seen_vos) {
GstCaps *caps = gst_caps_copy (MPEG4_VIDEO_CAPS);
gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM - 1, caps);
gst_caps_unref (caps);
return;
} else
return;
} else
return;
} else
return;
}
}
/*** video/x-h264 H264 elementary video stream ***/
static GstStaticCaps h264_video_caps = GST_STATIC_CAPS ("video/x-h264");
#define H264_VIDEO_CAPS gst_static_caps_get(&h264_video_caps)
#define H264_MAX_PROBE_LENGTH (128 * 1024) /* 128kB for HD should be enough. */
static void
h264_video_type_find (GstTypeFind * tf, gpointer unused)
{
/* Stream consists of: a series of sync codes (00 00 00 01) followed
* by NALs
*/
guint8 *data = NULL;
int offset = 0;
int stat_slice = 0;
int stat_dpa = 0;
int stat_dpb = 0;
int stat_dpc = 0;
int stat_idr = 0;
int stat_sps = 0;
int stat_pps = 0;
int nut, ref;
while (offset < H264_MAX_PROBE_LENGTH) {
data = gst_type_find_peek (tf, offset, 4);
if (data && IS_MPEG_HEADER (data)) {
nut = data[3] & 0x9f; /* forbiden_zero_bit | nal_unit_type */
ref = data[3] & 0x60; /* nal_ref_idc */
/* if forbiden bit is different to 0 won't be h264 */
if (nut > 0x1f)
goto done;
/* collect statistics about the NAL types */
if (nut == 1)
stat_slice++;
else if (nut == 2)
stat_dpa++;
else if (nut == 3)
stat_dpb++;
else if (nut == 4)
stat_dpc++;
else if ((nut == 5) && (ref != 0))
stat_idr++;
else if ((nut == 7) && (ref != 0))
stat_sps++;
else if ((nut == 8) && (ref != 0))
stat_pps++;
offset += 4;
}
offset += 1;
if ((stat_slice > 4 || (stat_dpa > 4 && stat_dpb > 4 && stat_dpc > 4)) &&
stat_idr >= 1 && stat_sps >= 1 && stat_pps >= 1) {
GstCaps *caps = gst_caps_copy (H264_VIDEO_CAPS);
gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM - 1, caps);
gst_caps_unref (caps);
goto done;
}
}
done:
return;
}
/*** video/mpeg video stream ***/
static GstStaticCaps mpeg_video_caps = GST_STATIC_CAPS ("video/mpeg, "
"systemstream = (boolean) false");
#define MPEG_VIDEO_CAPS gst_static_caps_get(&mpeg_video_caps)
static void
mpeg_video_type_find (GstTypeFind * tf, gpointer unused)
{
static const guint8 sequence_header[] = { 0x00, 0x00, 0x01, 0xb3 };
guint8 *data = NULL;
data = gst_type_find_peek (tf, 0, 8);
if (data && memcmp (data, sequence_header, 4) == 0) {
GstCaps *caps = gst_caps_copy (MPEG_VIDEO_CAPS);
gst_structure_set (gst_caps_get_structure (caps, 0), "mpegversion",
G_TYPE_INT, 1, NULL);
gst_type_find_suggest (tf, GST_TYPE_FIND_POSSIBLE, caps);
gst_caps_unref (caps);
}
}
/*
* Idea is the same as MPEG system stream typefinding: We check each
* byte of the stream to see if - from that point on - the stream
* matches a predefined set of marker bits as defined in the MPEG
* video specs.
*
* I'm sure someone will do a chance calculation here too.
*/
#define GST_MPEGVID_TYPEFIND_TRY_PICTURES 6
#define GST_MPEGVID_TYPEFIND_TRY_SYNC (100 * 1024) /* 100 kB */
#define GST_MPEGVID_TYPEFIND_SYNC_SIZE 2048
static void
mpeg_video_stream_type_find (GstTypeFind * tf, gpointer unused)
{
gint size = 0, found = 0;
guint64 skipped = 0;
guint8 *data = NULL;
while (1) {
if (found >= GST_MPEGVID_TYPEFIND_TRY_PICTURES) {
GstCaps *caps = gst_caps_copy (MPEG_VIDEO_CAPS);
gst_structure_set (gst_caps_get_structure (caps, 0), "mpegversion",
G_TYPE_INT, 1, NULL);
gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM - 2, caps);
gst_caps_unref (caps);
return;
}
if (skipped > GST_MPEGVID_TYPEFIND_TRY_SYNC)
break;
if (size < 5) {
data = gst_type_find_peek (tf, skipped, GST_MPEGVID_TYPEFIND_SYNC_SIZE);
if (!data)
break;
size = GST_MPEGVID_TYPEFIND_SYNC_SIZE;
}
if (IS_MPEG_HEADER (data)) {
/* An MPEG PACK header indicates that this isn't an elementary stream */
if (IS_MPEG_PACK_CODE (data[3])) {
if (mpeg_sys_is_valid_pack (tf, data, size, NULL))
break;
}
/* are we a sequence (0xB3) or GOP (0xB8) header? */
if (data[3] == 0xB3 || data[3] == 0xB8) {
size -= 8;
data += 8;
skipped += 8;
if (data[3] == 0xB3)
continue;
else if (size < 4) {
data =
gst_type_find_peek (tf, skipped, GST_MPEGVID_TYPEFIND_SYNC_SIZE);
size = GST_MPEGVID_TYPEFIND_SYNC_SIZE;
if (!data)
break;
}
/* else, we should now see an image */
}
}
/* image header (and, when found, slice header) */
if (IS_MPEG_HEADER (data) && data[4] == 0x0) {
size -= 8;
data += 8;
skipped += 8;
if (size < 5) {
data = gst_type_find_peek (tf, skipped, GST_MPEGVID_TYPEFIND_SYNC_SIZE);
size = GST_MPEGVID_TYPEFIND_SYNC_SIZE;
if (!data)
break;
}
if ((IS_MPEG_HEADER (data) && data[3] == 0x1) ||
(IS_MPEG_HEADER (data + 1) && data[4] == 0x1)) {
size -= 4;
data += 4;
skipped += 4;
found += 1;
continue;
}
}
size--;
data++;
skipped++;
}
}
/*** audio/x-aiff ***/
static GstStaticCaps aiff_caps = GST_STATIC_CAPS ("audio/x-aiff");
#define AIFF_CAPS gst_static_caps_get(&aiff_caps)
static void
aiff_type_find (GstTypeFind * tf, gpointer unused)
{
guint8 *data = gst_type_find_peek (tf, 0, 4);
if (data && memcmp (data, "FORM", 4) == 0) {
data += 8;
if (memcmp (data, "AIFF", 4) == 0 || memcmp (data, "AIFC", 4) == 0)
gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, AIFF_CAPS);
}
}
/*** audio/x-svx ***/
static GstStaticCaps svx_caps = GST_STATIC_CAPS ("audio/x-svx");
#define SVX_CAPS gst_static_caps_get(&svx_caps)
static void
svx_type_find (GstTypeFind * tf, gpointer unused)
{
guint8 *data = gst_type_find_peek (tf, 0, 4);
if (data && memcmp (data, "FORM", 4) == 0) {
data += 8;
if (memcmp (data, "8SVX", 4) == 0 || memcmp (data, "16SV", 4) == 0)
gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, SVX_CAPS);
}
}
/*** audio/x-shorten ***/
static GstStaticCaps shn_caps = GST_STATIC_CAPS ("audio/x-shorten");
#define SHN_CAPS gst_static_caps_get(&shn_caps)
static void
shn_type_find (GstTypeFind * tf, gpointer unused)
{
guint8 *data = gst_type_find_peek (tf, 0, 4);
if (data && memcmp (data, "ajkg", 4) == 0) {
gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, SHN_CAPS);
}
data = gst_type_find_peek (tf, -8, 8);
if (data && memcmp (data, "SHNAMPSK", 8) == 0) {
gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, SHN_CAPS);
}
}
/*** application/x-ape ***/
static GstStaticCaps ape_caps = GST_STATIC_CAPS ("application/x-ape");
#define APE_CAPS gst_static_caps_get(&ape_caps)
static void
ape_type_find (GstTypeFind * tf, gpointer unused)
{
guint8 *data = gst_type_find_peek (tf, 0, 4);
if (data && memcmp (data, "MAC ", 4) == 0) {
gst_type_find_suggest (tf, GST_TYPE_FIND_LIKELY + 10, APE_CAPS);
}
}
/*** ISO FORMATS ***/
/*** audio/x-m4a ***/
static GstStaticCaps m4a_caps = GST_STATIC_CAPS ("audio/x-m4a");
#define M4A_CAPS (gst_static_caps_get(&m4a_caps))
static void
m4a_type_find (GstTypeFind * tf, gpointer unused)
{
guint8 *data = gst_type_find_peek (tf, 4, 8);
if (data &&
(memcmp (data, "ftypM4A ", 8) == 0 ||
memcmp (data, "ftypmp42", 8) == 0)) {
gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, M4A_CAPS);
}
}
/*** application/x-3gp ***/
/* The Q is there because variables can't start with a number. */
static GstStaticCaps q3gp_caps = GST_STATIC_CAPS ("application/x-3gp");
#define Q3GP_CAPS (gst_static_caps_get(&q3gp_caps))
static void
q3gp_type_find (GstTypeFind * tf, gpointer unused)
{
guint32 ftyp_size = 0;
gint offset = 0;
guint8 *data = NULL;
if ((data = gst_type_find_peek (tf, 0, 12)) == NULL) {
return;
}
data += 4;
if (memcmp (data, "ftyp", 4) != 0) {
return;
}
/* check major brand */
data += 4;
if (memcmp (data, "3gp", 3) == 0 ||
memcmp (data, "3gr", 3) == 0 ||
memcmp (data, "3gs", 3) == 0 || memcmp (data, "3gg", 3) == 0) {
gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, Q3GP_CAPS);
return;
}
/* check compatible brands */
if ((data = gst_type_find_peek (tf, 0, 4)) != NULL) {
ftyp_size = GST_READ_UINT32_BE (data);
}
for (offset = 16; offset < ftyp_size; offset += 4) {
if ((data = gst_type_find_peek (tf, offset, 3)) == NULL) {
break;
}
if (memcmp (data, "3gp", 3) == 0 ||
memcmp (data, "3gr", 3) == 0 ||
memcmp (data, "3gs", 3) == 0 || memcmp (data, "3gg", 3) == 0) {
gst_type_find_suggest (tf, GST_TYPE_FIND_LIKELY, Q3GP_CAPS);
break;
}
}
return;
}
/*** video/quicktime ***/
static GstStaticCaps qt_caps = GST_STATIC_CAPS ("video/quicktime");
#define QT_CAPS gst_static_caps_get(&qt_caps)
#define STRNCMP(x,y,z) (strncmp ((char*)(x), (char*)(y), z))
static void
qt_type_find (GstTypeFind * tf, gpointer unused)
{
guint8 *data;
guint tip = 0;
guint64 offset = 0;
guint64 size;
while ((data = gst_type_find_peek (tf, offset, 8)) != NULL) {
/* box/atom types that are in common with ISO base media file format */
if (STRNCMP (&data[4], "moov", 4) == 0 ||
STRNCMP (&data[4], "mdat", 4) == 0 ||
STRNCMP (&data[4], "ftyp", 4) == 0 ||
STRNCMP (&data[4], "free", 4) == 0 ||
STRNCMP (&data[4], "uuid", 4) == 0 ||
STRNCMP (&data[4], "skip", 4) == 0) {
if (tip == 0) {
tip = GST_TYPE_FIND_LIKELY;
} else {
tip = GST_TYPE_FIND_NEARLY_CERTAIN;
}
}
/* other box/atom types, apparently quicktime specific */
else if (STRNCMP (&data[4], "pnot", 4) == 0 ||
STRNCMP (&data[4], "PICT", 4) == 0 ||
STRNCMP (&data[4], "wide", 4) == 0 ||
STRNCMP (&data[4], "prfl", 4) == 0) {
tip = GST_TYPE_FIND_MAXIMUM;
break;
} else {
tip = 0;
break;
}
size = GST_READ_UINT32_BE (data);
if (size == 1) {
guint8 *sizedata;
sizedata = gst_type_find_peek (tf, offset + 8, 8);
if (sizedata == NULL)
break;
size = GST_READ_UINT64_BE (sizedata);
} else {
if (size < 8)
break;
}
offset += size;
}
if (tip > 0) {
gst_type_find_suggest (tf, tip, QT_CAPS);
}
};
/*** image/x-quicktime ***/
static GstStaticCaps qtif_caps = GST_STATIC_CAPS ("image/x-quicktime");
#define QTIF_CAPS gst_static_caps_get(&qtif_caps)
/* how many atoms we check before we give up */
#define QTIF_MAXROUNDS 25
static void
qtif_type_find (GstTypeFind * tf, gpointer unused)
{
const guint8 *data;
gboolean found_idsc = FALSE;
gboolean found_idat = FALSE;
guint64 offset = 0;
guint rounds = 0;
while ((data = gst_type_find_peek (tf, offset, 8)) != NULL) {
guint64 size;
size = GST_READ_UINT32_BE (data);
if (size == 1) {
const guint8 *sizedata;
sizedata = gst_type_find_peek (tf, offset + 8, 8);
if (sizedata == NULL)
break;
size = GST_READ_UINT64_BE (sizedata);
}
if (size < 8)
break;
if (STRNCMP (data + 4, "idsc", 4) == 0)
found_idsc = TRUE;
if (STRNCMP (data + 4, "idat", 4) == 0)
found_idat = TRUE;
if (found_idsc && found_idat) {
gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, QTIF_CAPS);
return;
}
offset += size;
if (++rounds > QTIF_MAXROUNDS)
break;
}
if (found_idsc || found_idat) {
gst_type_find_suggest (tf, GST_TYPE_FIND_LIKELY, QTIF_CAPS);
return;
}
};
/*** audio/x-mod ***/
static GstStaticCaps mod_caps = GST_STATIC_CAPS ("audio/x-mod");
#define MOD_CAPS gst_static_caps_get(&mod_caps)
/* FIXME: M15 CheckType to do */
static void
mod_type_find (GstTypeFind * tf, gpointer unused)
{
guint8 *data;
/* MOD */
if ((data = gst_type_find_peek (tf, 1080, 4)) != NULL) {
/* Protracker and variants */
if ((memcmp (data, "M.K.", 4) == 0) || (memcmp (data, "M!K!", 4) == 0) ||
/* Star Tracker */
(memcmp (data, "FLT", 3) == 0 && isdigit (data[3])) ||
(memcmp (data, "EXO", 3) == 0 && isdigit (data[3])) ||
/* Oktalyzer (Amiga) */
(memcmp (data, "OKTA", 4) == 0) ||
/* Oktalyser (Atari) */
(memcmp (data, "CD81", 4) == 0) ||
/* Fasttracker */
(memcmp (data + 1, "CHN", 3) == 0 && isdigit (data[0])) ||
/* Fasttracker or Taketracker */
(memcmp (data + 2, "CH", 2) == 0 && isdigit (data[0])
&& isdigit (data[1])) || (memcmp (data + 2, "CN", 2) == 0
&& isdigit (data[0]) && isdigit (data[1]))) {
gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, MOD_CAPS);
return;
}
}
/* XM */
if ((data = gst_type_find_peek (tf, 0, 38)) != NULL) {
if (memcmp (data, "Extended Module: ", 17) == 0 && data[37] == 0x1A) {
gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, MOD_CAPS);
return;
}
}
/* OKT */
if (data || (data = gst_type_find_peek (tf, 0, 8)) != NULL) {
if (memcmp (data, "OKTASONG", 8) == 0) {
gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, MOD_CAPS);
return;
}
}
if (data || (data = gst_type_find_peek (tf, 0, 4)) != NULL) {
/* 669 */
if ((memcmp (data, "if", 2) == 0) || (memcmp (data, "JN", 2) == 0)) {
gst_type_find_suggest (tf, GST_TYPE_FIND_LIKELY, MOD_CAPS);
return;
}
/* AMF */
if ((memcmp (data, "AMF", 3) == 0 && data[3] > 10 && data[3] < 14) ||
/* IT */
(memcmp (data, "IMPM", 4) == 0) ||
/* MED */
(memcmp (data, "MMD0", 4) == 0) || (memcmp (data, "MMD1", 4) == 0) ||
/* MTM */
(memcmp (data, "MTM", 3) == 0)) {
gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, MOD_CAPS);
return;
}
/* DSM */
if (memcmp (data, "RIFF", 4) == 0) {
guint8 *data2 = gst_type_find_peek (tf, 8, 4);
if (data2) {
if (memcmp (data2, "DSMF", 4) == 0) {
gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, MOD_CAPS);
return;
}
}
}
/* FAM */
if (memcmp (data, "FAM\xFE", 4) == 0) {
guint8 *data2 = gst_type_find_peek (tf, 44, 3);
if (data2) {
if (memcmp (data2, "compare", 3) == 0) {
gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, MOD_CAPS);
return;
}
} else {
gst_type_find_suggest (tf, GST_TYPE_FIND_LIKELY, MOD_CAPS);
return;
}
}
/* GDM */
if (memcmp (data, "GDM\xFE", 4) == 0) {
guint8 *data2 = gst_type_find_peek (tf, 71, 4);
if (data2) {
if (memcmp (data2, "GMFS", 4) == 0) {
gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, MOD_CAPS);
return;
}
} else {
gst_type_find_suggest (tf, GST_TYPE_FIND_LIKELY, MOD_CAPS);
return;
}
}
}
/* IMF */
if ((data = gst_type_find_peek (tf, 60, 4)) != NULL) {
if (memcmp (data, "IM10", 4) == 0) {
gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, MOD_CAPS);
return;
}
}
/* S3M */
if ((data = gst_type_find_peek (tf, 44, 4)) != NULL) {
if (memcmp (data, "SCRM", 4) == 0) {
gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, MOD_CAPS);
return;
}
}
}
/*** application/x-shockwave-flash ***/
static GstStaticCaps swf_caps =
GST_STATIC_CAPS ("application/x-shockwave-flash");
#define SWF_CAPS (gst_static_caps_get(&swf_caps))
static void
swf_type_find (GstTypeFind * tf, gpointer unused)
{
guint8 *data = gst_type_find_peek (tf, 0, 4);
if (data && (data[0] == 'F' || data[0] == 'C') &&
data[1] == 'W' && data[2] == 'S') {
gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, SWF_CAPS);
}
}
/*** image/jpeg ***/
static GstStaticCaps jpeg_caps = GST_STATIC_CAPS ("image/jpeg");
#define JPEG_CAPS (gst_static_caps_get(&jpeg_caps))
static void
jpeg_type_find (GstTypeFind * tf, gpointer unused)
{
guint8 *data = gst_type_find_peek (tf, 0, 10);
guint8 header[2] = { 0xFF, 0xD8 };
if (data && memcmp (data, header, 2) == 0) {
if (memcmp (data + 6, "JFIF", 4) == 0) {
gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, JPEG_CAPS);
} else if (memcmp (data + 6, "Exif", 4) == 0) {
gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, JPEG_CAPS);
} else {
gst_type_find_suggest (tf, GST_TYPE_FIND_POSSIBLE, JPEG_CAPS);
}
}
}
/*** image/bmp ***/
static GstStaticCaps bmp_caps = GST_STATIC_CAPS ("image/bmp");
#define BMP_CAPS (gst_static_caps_get(&bmp_caps))
static void
bmp_type_find (GstTypeFind * tf, gpointer unused)
{
guint8 *data = gst_type_find_peek (tf, 0, 18);
if (data && memcmp (data, "BM", 2) == 0) {
if ((data[14] == 0x0C ||
data[14] == 0x28 ||
data[14] == 0xF0) &&
data[15] == 0 && data[16] == 0 && data[17] == 0) {
gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, BMP_CAPS);
}
}
}
/*** image/tiff ***/
static GstStaticCaps tiff_caps = GST_STATIC_CAPS ("image/tiff, "
"endianness = (int) { BIG_ENDIAN, LITTLE_ENDIAN }");
#define TIFF_CAPS (gst_static_caps_get(&tiff_caps))
static GstStaticCaps tiff_be_caps = GST_STATIC_CAPS ("image/tiff, "
"endianness = (int) BIG_ENDIAN");
#define TIFF_BE_CAPS (gst_static_caps_get(&tiff_be_caps))
static GstStaticCaps tiff_le_caps = GST_STATIC_CAPS ("image/tiff, "
"endianness = (int) LITTLE_ENDIAN");
#define TIFF_LE_CAPS (gst_static_caps_get(&tiff_le_caps))
static void
tiff_type_find (GstTypeFind * tf, gpointer ununsed)
{
guint8 *data = gst_type_find_peek (tf, 0, 8);
guint8 le_header[4] = { 0x49, 0x49, 0x2A, 0x00 };
guint8 be_header[4] = { 0x4D, 0x4D, 0x00, 0x2A };
if (data) {
if (memcmp (data, le_header, 4) == 0) {
gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, TIFF_LE_CAPS);
} else if (memcmp (data, be_header, 4) == 0) {
gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, TIFF_BE_CAPS);
}
}
}
static GstStaticCaps sds_caps = GST_STATIC_CAPS ("audio/x-sds");
#define SDS_CAPS (gst_static_caps_get(&sds_caps))
static void
sds_type_find (GstTypeFind * tf, gpointer ununsed)
{
guint8 *data = gst_type_find_peek (tf, 0, 4);
guint8 mask[4] = { 0xFF, 0xFF, 0x80, 0xFF };
guint8 match[4] = { 0xF0, 0x7E, 0, 0x01 };
gint x;
if (data) {
for (x = 0; x < 4; x++) {
if ((data[x] & mask[x]) != match[x]) {
return;
}
}
gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, SDS_CAPS);
}
}
static GstStaticCaps ircam_caps = GST_STATIC_CAPS ("audio/x-ircam");
#define IRCAM_CAPS (gst_static_caps_get(&ircam_caps))
static void
ircam_type_find (GstTypeFind * tf, gpointer ununsed)
{
guint8 *data = gst_type_find_peek (tf, 0, 4);
guint8 mask[4] = { 0xFF, 0xFF, 0xF8, 0xFF };
guint8 match[4] = { 0x64, 0xA3, 0x00, 0x00 };
gint x;
gboolean matched = TRUE;
if (!data) {
return;
}
for (x = 0; x < 4; x++) {
if ((data[x] & mask[x]) != match[x]) {
matched = FALSE;
}
}
if (matched) {
gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, IRCAM_CAPS);
return;
}
/* now try the reverse version */
matched = TRUE;
for (x = 0; x < 4; x++) {
if ((data[x] & mask[3 - x]) != match[3 - x]) {
matched = FALSE;
}
}
}
/*** video/x-matroska ***/
static GstStaticCaps matroska_caps = GST_STATIC_CAPS ("video/x-matroska");
#define MATROSKA_CAPS (gst_static_caps_get(&matroska_caps))
static void
matroska_type_find (GstTypeFind * tf, gpointer ununsed)
{
/* 4 bytes for EBML ID, 1 byte for header length identifier */
guint8 *data = gst_type_find_peek (tf, 0, 4 + 1);
gint len_mask = 0x80, size = 1, n = 1, total;
guint8 probe_data[] = { 'm', 'a', 't', 'r', 'o', 's', 'k', 'a' };
if (!data)
return;
/* ebml header? */
if (data[0] != 0x1A || data[1] != 0x45 || data[2] != 0xDF || data[3] != 0xA3)
return;
/* length of header */
total = data[4];
while (size <= 8 && !(total & len_mask)) {
size++;
len_mask >>= 1;
}
if (size > 8)
return;
total &= (len_mask - 1);
while (n < size)
total = (total << 8) | data[4 + n++];
/* get new data for full header, 4 bytes for EBML ID,
* EBML length tag and the actual header */
data = gst_type_find_peek (tf, 0, 4 + size + total);
if (!data)
return;
/* the header must contain the document type 'matroska'. For now,
* we don't parse the whole header but simply check for the
* availability of that array of characters inside the header.
* Not fully fool-proof, but good enough. */
for (n = 4 + size; n <= 4 + size + total - sizeof (probe_data); n++)
if (!memcmp (&data[n], probe_data, sizeof (probe_data))) {
gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, MATROSKA_CAPS);
break;
}
}
/*** video/x-dv ***/
static GstStaticCaps dv_caps = GST_STATIC_CAPS ("video/x-dv, "
"systemstream = (boolean) true");
#define DV_CAPS (gst_static_caps_get(&dv_caps))
static void
dv_type_find (GstTypeFind * tf, gpointer private)
{
guint8 *data;
data = gst_type_find_peek (tf, 0, 5);
/* check for DIF and DV flag */
if (data && (data[0] == 0x1f) && (data[1] == 0x07) && (data[2] == 0x00) &&
((data[4] & 0x01) == 0)) {
gchar *format;
GstCaps *caps = gst_caps_copy (DV_CAPS);
if (data[3] & 0x80) {
format = "PAL";
} else {
format = "NTSC";
}
gst_structure_set (gst_caps_get_structure (caps, 0), "format",
G_TYPE_STRING, format, NULL);
gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, caps);
gst_caps_unref (caps);
}
}
/*** application/ogg and application/x-annodex ***/
static GstStaticCaps ogg_caps = GST_STATIC_CAPS ("application/ogg");
static GstStaticCaps annodex_caps = GST_STATIC_CAPS ("application/x-annodex");
#define OGGANX_CAPS (gst_static_caps_get(&annodex_caps))
static void
ogganx_type_find (GstTypeFind * tf, gpointer private)
{
guint8 *data = gst_type_find_peek (tf, 0, 4);
if ((data != NULL) && (memcmp (data, "OggS", 4) == 0)) {
/* Check for an annodex fishbone header */
data = gst_type_find_peek (tf, 28, 8);
if (data && memcmp (data, "fishead\0", 8) == 0)
gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, OGGANX_CAPS);
gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM,
gst_static_caps_get (&ogg_caps));
}
}
/*** audio/x-vorbis ***/
static GstStaticCaps vorbis_caps = GST_STATIC_CAPS ("audio/x-vorbis");
#define VORBIS_CAPS (gst_static_caps_get(&vorbis_caps))
static void
vorbis_type_find (GstTypeFind * tf, gpointer private)
{
guint8 *data = gst_type_find_peek (tf, 0, 30);
if (data) {
guint blocksize_0;
guint blocksize_1;
/* 1 byte packet type (identification=0x01)
6 byte string "vorbis"
4 byte vorbis version */
if (memcmp (data, "\001vorbis\000\000\000\000", 11) != 0)
return;
data += 11;
/* 1 byte channels must be != 0 */
if (data[0] == 0)
return;
data++;
/* 4 byte samplerate must be != 0 */
if (GST_READ_UINT32_LE (data) == 0)
return;
data += 16;
/* blocksize checks */
blocksize_0 = data[0] & 0x0F;
blocksize_1 = (data[0] & 0xF0) >> 4;
if (blocksize_0 > blocksize_1)
return;
if (blocksize_0 < 6 || blocksize_0 > 13)
return;
if (blocksize_1 < 6 || blocksize_1 > 13)
return;
data++;
/* framing bit */
if ((data[0] & 0x01) != 1)
return;
gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, VORBIS_CAPS);
}
}
/*** video/x-theora ***/
static GstStaticCaps theora_caps = GST_STATIC_CAPS ("video/x-theora");
#define THEORA_CAPS (gst_static_caps_get(&theora_caps))
static void
theora_type_find (GstTypeFind * tf, gpointer private)
{
guint8 *data = gst_type_find_peek (tf, 0, 7); //42);
if (data) {
if (data[0] != 0x80)
return;
if (memcmp (&data[1], "theora", 6) != 0)
return;
/* FIXME: make this more reliable when specs are out */
gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, THEORA_CAPS);
}
}
/*** application/x-ogm-video or audio***/
static GstStaticCaps ogmvideo_caps =
GST_STATIC_CAPS ("application/x-ogm-video");
#define OGMVIDEO_CAPS (gst_static_caps_get(&ogmvideo_caps))
static void
ogmvideo_type_find (GstTypeFind * tf, gpointer private)
{
guint8 *data = gst_type_find_peek (tf, 0, 9);
if (data) {
if (memcmp (data, "\001video\000\000\000", 9) != 0)
return;
gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, OGMVIDEO_CAPS);
}
}
static GstStaticCaps ogmaudio_caps =
GST_STATIC_CAPS ("application/x-ogm-audio");
#define OGMAUDIO_CAPS (gst_static_caps_get(&ogmaudio_caps))
static void
ogmaudio_type_find (GstTypeFind * tf, gpointer private)
{
guint8 *data = gst_type_find_peek (tf, 0, 9);
if (data) {
if (memcmp (data, "\001audio\000\000\000", 9) != 0)
return;
gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, OGMAUDIO_CAPS);
}
}
static GstStaticCaps ogmtext_caps = GST_STATIC_CAPS ("application/x-ogm-text");
#define OGMTEXT_CAPS (gst_static_caps_get(&ogmtext_caps))
static void
ogmtext_type_find (GstTypeFind * tf, gpointer private)
{
guint8 *data = gst_type_find_peek (tf, 0, 9);
if (data) {
if (memcmp (data, "\001text\000\000\000\000", 9) != 0)
return;
gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, OGMTEXT_CAPS);
}
}
/*** audio/x-speex ***/
static GstStaticCaps speex_caps = GST_STATIC_CAPS ("audio/x-speex");
#define SPEEX_CAPS (gst_static_caps_get(&speex_caps))
static void
speex_type_find (GstTypeFind * tf, gpointer private)
{
guint8 *data = gst_type_find_peek (tf, 0, 80);
if (data) {
/* 8 byte string "Speex "
24 byte speex version string + int */
if (memcmp (data, "Speex ", 8) != 0)
return;
data += 32;
/* 4 byte header size >= 80 */
if (GST_READ_UINT32_LE (data) < 80)
return;
data += 4;
/* 4 byte sample rate <= 48000 */
if (GST_READ_UINT32_LE (data) > 48000)
return;
data += 4;
/* currently there are only 3 speex modes. */
if (GST_READ_UINT32_LE (data) > 3)
return;
data += 12;
gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, SPEEX_CAPS);
}
}
/*** application/x-ogg-skeleton ***/
static GstStaticCaps ogg_skeleton_caps =
GST_STATIC_CAPS ("application/x-ogg-skeleton, parsed=(boolean)FALSE");
#define OGG_SKELETON_CAPS (gst_static_caps_get(&ogg_skeleton_caps))
static void
oggskel_type_find (GstTypeFind * tf, gpointer private)
{
guint8 *data = gst_type_find_peek (tf, 0, 12);
if (data) {
/* 8 byte string "fishead\0" for the ogg skeleton stream */
if (memcmp (data, "fishead\0", 8) != 0)
return;
data += 8;
/* Require that the header contains version 3.0 */
if (GST_READ_UINT16_LE (data) != 3)
return;
data += 2;
if (GST_READ_UINT16_LE (data) != 0)
return;
gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, OGG_SKELETON_CAPS);
}
}
static GstStaticCaps cmml_caps = GST_STATIC_CAPS ("text/x-cmml");
#define CMML_CAPS (gst_static_caps_get(&cmml_caps))
static void
cmml_type_find (GstTypeFind * tf, gpointer private)
{
/* Header is 12 bytes minimum (though we don't check the minor version */
guint8 *data = gst_type_find_peek (tf, 0, 12);
if (data) {
/* 8 byte string "CMML\0\0\0\0" for the magic number */
if (memcmp (data, "CMML\0\0\0\0", 8) != 0)
return;
data += 8;
/* Require that the header contains at least version 2.0 */
if (GST_READ_UINT16_LE (data) < 2)
return;
gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, CMML_CAPS);
}
}
/*** application/x-tar ***/
static GstStaticCaps tar_caps = GST_STATIC_CAPS ("application/x-tar");
#define TAR_CAPS (gst_static_caps_get(&tar_caps))
#define OLDGNU_MAGIC "ustar " /* 7 chars and a NUL */
#define NEWGNU_MAGIC "ustar" /* 5 chars and a NUL */
static void
tar_type_find (GstTypeFind * tf, gpointer unused)
{
guint8 *data = gst_type_find_peek (tf, 257, 8);
/* of course we are not certain, but we don't want other typefind funcs
* to detect formats of files within the tar archive, e.g. mp3s */
if (data) {
if (memcmp (data, OLDGNU_MAGIC, 8) == 0) { /* sic */
gst_type_find_suggest (tf, GST_TYPE_FIND_NEARLY_CERTAIN, TAR_CAPS);
} else if (memcmp (data, NEWGNU_MAGIC, 6) == 0 && /* sic */
g_ascii_isdigit (data[6]) && g_ascii_isdigit (data[7])) {
gst_type_find_suggest (tf, GST_TYPE_FIND_NEARLY_CERTAIN, TAR_CAPS);
}
}
}
/*** application/x-ar ***/
static GstStaticCaps ar_caps = GST_STATIC_CAPS ("application/x-ar");
#define AR_CAPS (gst_static_caps_get(&ar_caps))
static void
ar_type_find (GstTypeFind * tf, gpointer unused)
{
guint8 *data = gst_type_find_peek (tf, 0, 24);
if (data && memcmp (data, "!<arch>", 7) == 0) {
gint i;
for (i = 7; i < 24; ++i) {
if (!g_ascii_isprint (data[i]) && data[i] != '\n') {
gst_type_find_suggest (tf, GST_TYPE_FIND_POSSIBLE, AR_CAPS);
}
}
gst_type_find_suggest (tf, GST_TYPE_FIND_NEARLY_CERTAIN, AR_CAPS);
}
}
/*** audio/x-au ***/
/* NOTE: we cannot replace this function with TYPE_FIND_REGISTER_START_WITH,
* as it is only possible to register one typefind factory per 'name'
* (which is in this case the caps), and the first one would be replaced by
* the second one. */
static GstStaticCaps au_caps = GST_STATIC_CAPS ("audio/x-au");
#define AU_CAPS (gst_static_caps_get(&au_caps))
static void
au_type_find (GstTypeFind * tf, gpointer unused)
{
guint8 *data = gst_type_find_peek (tf, 0, 4);
if (data) {
if (memcmp (data, ".snd", 4) == 0 || memcmp (data, "dns.", 4) == 0) {
gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, AU_CAPS);
}
}
}
/*** video/x-nuv ***/
/* NOTE: we cannot replace this function with TYPE_FIND_REGISTER_START_WITH,
* as it is only possible to register one typefind factory per 'name'
* (which is in this case the caps), and the first one would be replaced by
* the second one. */
static GstStaticCaps nuv_caps = GST_STATIC_CAPS ("video/x-nuv");
#define NUV_CAPS (gst_static_caps_get(&nuv_caps))
static void
nuv_type_find (GstTypeFind * tf, gpointer unused)
{
guint8 *data = gst_type_find_peek (tf, 0, 11);
if (data) {
if (memcmp (data, "MythTVVideo", 11) == 0
|| memcmp (data, "NuppelVideo", 11) == 0) {
gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, NUV_CAPS);
}
}
}
/*** audio/x-paris ***/
/* NOTE: do not replace this function with two TYPE_FIND_REGISTER_START_WITH */
static GstStaticCaps paris_caps = GST_STATIC_CAPS ("audio/x-paris");
#define PARIS_CAPS (gst_static_caps_get(&paris_caps))
static void
paris_type_find (GstTypeFind * tf, gpointer unused)
{
guint8 *data = gst_type_find_peek (tf, 0, 4);
if (data) {
if (memcmp (data, " paf", 4) == 0 || memcmp (data, "fap ", 4) == 0) {
gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, PARIS_CAPS);
}
}
}
/*** audio/iLBC-sh ***/
/* NOTE: do not replace this function with two TYPE_FIND_REGISTER_START_WITH */
static GstStaticCaps ilbc_caps = GST_STATIC_CAPS ("audio/iLBC-sh");
#define ILBC_CAPS (gst_static_caps_get(&ilbc_caps))
static void
ilbc_type_find (GstTypeFind * tf, gpointer unused)
{
guint8 *data = gst_type_find_peek (tf, 0, 8);
if (data) {
if (memcmp (data, "#!iLBC30", 8) == 0 || memcmp (data, "#!iLBC20", 8) == 0) {
gst_type_find_suggest (tf, GST_TYPE_FIND_LIKELY, ILBC_CAPS);
}
}
}
/*** application/x-ms-dos-executable ***/
static GstStaticCaps msdos_caps =
GST_STATIC_CAPS ("application/x-ms-dos-executable");
#define MSDOS_CAPS (gst_static_caps_get(&msdos_caps))
/* see http://www.madchat.org/vxdevl/papers/winsys/pefile/pefile.htm */
static void
msdos_type_find (GstTypeFind * tf, gpointer unused)
{
guint8 *data = gst_type_find_peek (tf, 0, 64);
if (data && data[0] == 'M' && data[1] == 'Z' &&
GST_READ_UINT16_LE (data + 8) == 4) {
guint32 pe_offset = GST_READ_UINT32_LE (data + 60);
data = gst_type_find_peek (tf, pe_offset, 2);
if (data && data[0] == 'P' && data[1] == 'E') {
gst_type_find_suggest (tf, GST_TYPE_FIND_NEARLY_CERTAIN, MSDOS_CAPS);
}
}
}
/*** application/x-mmsh ***/
static GstStaticCaps mmsh_caps = GST_STATIC_CAPS ("application/x-mmsh");
#define MMSH_CAPS gst_static_caps_get(&mmsh_caps)
/* This is to recognise mssh-over-http */
static void
mmsh_type_find (GstTypeFind * tf, gpointer unused)
{
static const guint8 asf_marker[16] = { 0x30, 0x26, 0xb2, 0x75, 0x8e, 0x66,
0xcf, 0x11, 0xa6, 0xd9, 0x00, 0xaa, 0x00, 0x62, 0xce, 0x6c
};
guint8 *data;
data = gst_type_find_peek (tf, 0, 2 + 2 + 4 + 2 + 2 + 16);
if (data && data[0] == 0x24 && data[1] == 0x48 &&
GST_READ_UINT16_LE (data + 2) > 2 + 2 + 4 + 2 + 2 + 16 &&
memcmp (data + 2 + 2 + 4 + 2 + 2, asf_marker, 16) == 0) {
GstCaps *caps = gst_caps_copy (MMSH_CAPS);
gst_type_find_suggest (tf, GST_TYPE_FIND_LIKELY, caps);
gst_caps_unref (caps);
return;
}
}
/*** video/x-dirac ***/
/* NOTE: we cannot replace this function with TYPE_FIND_REGISTER_START_WITH,
* as it is only possible to register one typefind factory per 'name'
* (which is in this case the caps), and the first one would be replaced by
* the second one. */
static GstStaticCaps dirac_caps = GST_STATIC_CAPS ("video/x-dirac");
#define DIRAC_CAPS (gst_static_caps_get(&dirac_caps))
static void
dirac_type_find (GstTypeFind * tf, gpointer unused)
{
guint8 *data = gst_type_find_peek (tf, 0, 8);
if (data) {
if (memcmp (data, "BBCD", 4) == 0 || memcmp (data, "KW-DIRAC", 8) == 0) {
gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, DIRAC_CAPS);
}
}
}
/*** video/vivo ***/
static GstStaticCaps vivo_caps = GST_STATIC_CAPS ("video/vivo");
#define VIVO_CAPS gst_static_caps_get(&vivo_caps)
static void
vivo_type_find (GstTypeFind * tf, gpointer unused)
{
static const guint8 vivo_marker[] = { 'V', 'e', 'r', 's', 'i', 'o', 'n',
':', 'V', 'i', 'v', 'o', '/'
};
guint8 *data;
guint hdr_len, pos;
data = gst_type_find_peek (tf, 0, 1024);
if (data == NULL || data[0] != 0x00)
return;
if ((data[1] & 0x80)) {
if ((data[2] & 0x80))
return;
hdr_len = ((guint) (data[1] & 0x7f)) << 7;
hdr_len += data[2];
if (hdr_len > 2048)
return;
pos = 3;
} else {
hdr_len = data[1];
pos = 2;
}
/* 1008 = 1022 - strlen ("Version:Vivo/") - 1 */
while (pos < 1008 && data[pos] == '\r' && data[pos + 1] == '\n')
pos += 2;
if (memcmp (data + pos, vivo_marker, sizeof (vivo_marker)) == 0) {
gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, VIVO_CAPS);
}
}
/*** generic typefind for streams that have some data at a specific position***/
typedef struct
{
const guint8 *data;
guint size;
guint probability;
GstCaps *caps;
}
GstTypeFindData;
static void
start_with_type_find (GstTypeFind * tf, gpointer private)
{
GstTypeFindData *start_with = (GstTypeFindData *) private;
guint8 *data;
GST_LOG ("trying to find mime type %s with the first %u bytes of data",
gst_structure_get_name (gst_caps_get_structure (start_with->caps, 0)),
start_with->size);
data = gst_type_find_peek (tf, 0, start_with->size);
if (data && memcmp (data, start_with->data, start_with->size) == 0) {
gst_type_find_suggest (tf, start_with->probability, start_with->caps);
}
}
static void
sw_data_destroy (GstTypeFindData * sw_data)
{
if (G_LIKELY (sw_data->caps != NULL))
gst_caps_unref (sw_data->caps);
g_free (sw_data);
}
#define TYPE_FIND_REGISTER_START_WITH(plugin,name,rank,ext,_data,_size,_probability)\
G_BEGIN_DECLS{ \
GstTypeFindData *sw_data = g_new (GstTypeFindData, 1); \
sw_data->data = (const guint8 *)_data; \
sw_data->size = _size; \
sw_data->probability = _probability; \
sw_data->caps = gst_caps_new_simple (name, NULL); \
if (!gst_type_find_register (plugin, name, rank, start_with_type_find,\
ext, sw_data->caps, sw_data, \
(GDestroyNotify) (sw_data_destroy))) { \
gst_caps_unref (sw_data->caps); \
g_free (sw_data); \
} \
}G_END_DECLS
/*** same for riff types ***/
static void
riff_type_find (GstTypeFind * tf, gpointer private)
{
GstTypeFindData *riff_data = (GstTypeFindData *) private;
guint8 *data = gst_type_find_peek (tf, 0, 12);
if (data && memcmp (data, "RIFF", 4) == 0) {
data += 8;
if (memcmp (data, riff_data->data, 4) == 0)
gst_type_find_suggest (tf, riff_data->probability, riff_data->caps);
}
}
#define TYPE_FIND_REGISTER_RIFF(plugin,name,rank,ext,_data) \
G_BEGIN_DECLS{ \
GstTypeFindData *sw_data = g_new (GstTypeFindData, 1); \
sw_data->data = (gpointer)_data; \
sw_data->size = 4; \
sw_data->probability = GST_TYPE_FIND_MAXIMUM; \
sw_data->caps = gst_caps_new_simple (name, NULL); \
if (!gst_type_find_register (plugin, name, rank, riff_type_find, \
ext, sw_data->caps, sw_data, \
(GDestroyNotify) (sw_data_destroy))) { \
gst_caps_unref (sw_data->caps); \
g_free (sw_data); \
} \
}G_END_DECLS
/*** plugin initialization ***/
#define TYPE_FIND_REGISTER(plugin,name,rank,func,ext,caps,priv,notify) \
G_BEGIN_DECLS{\
if (!gst_type_find_register (plugin, name, rank, func, ext, caps, priv, notify))\
return FALSE; \
}G_END_DECLS
static gboolean
plugin_init (GstPlugin * plugin)
{
/* can't initialize this via a struct as caps can't be statically initialized */
/* note: asx/wax/wmx are XML files, asf doesn't handle them */
/* FIXME-0.11: these should be const,
this requires gstreamer/gst/gsttypefind::gst_type_find_register()
to have define the parameter as const
*/
static gchar *asf_exts[] = { "asf", "wm", "wma", "wmv", NULL };
static gchar *au_exts[] = { "au", "snd", NULL };
static gchar *avi_exts[] = { "avi", NULL };
static gchar *qcp_exts[] = { "qcp", NULL };
static gchar *cdxa_exts[] = { "dat", NULL };
static gchar *flac_exts[] = { "flac", NULL };
static gchar *flx_exts[] = { "flc", "fli", NULL };
static gchar *id3_exts[] =
{ "mp3", "mp2", "mp1", "mpga", "ogg", "flac", "tta", NULL };
static gchar *apetag_exts[] = { "ape", "mpc", "wv", NULL }; /* and mp3 and wav? */
static gchar *tta_exts[] = { "tta", NULL };
static gchar *mod_exts[] = { "669", "amf", "dsm", "gdm", "far", "imf",
"it", "med", "mod", "mtm", "okt", "sam",
"s3m", "stm", "stx", "ult", "xm", NULL
};
static gchar *mp3_exts[] = { "mp3", "mp2", "mp1", "mpga", NULL };
static gchar *ac3_exts[] = { "ac3", NULL };
static gchar *musepack_exts[] = { "mpc", NULL };
static gchar *mpeg_sys_exts[] = { "mpe", "mpeg", "mpg", NULL };
static gchar *mpeg_video_exts[] = { "mpv", "mpeg", "mpg", NULL };
static gchar *mpeg_ts_exts[] = { "ts", NULL };
static gchar *ogg_exts[] = { "anx", "ogg", "ogm", NULL };
static gchar *qt_exts[] = { "mov", NULL };
static gchar *qtif_exts[] = { "qif", "qtif", "qti", NULL };
static gchar *rm_exts[] = { "ra", "ram", "rm", "rmvb", NULL };
static gchar *swf_exts[] = { "swf", "swfl", NULL };
static gchar *utf8_exts[] = { "txt", NULL };
static gchar *wav_exts[] = { "wav", NULL };
static gchar *aiff_exts[] = { "aiff", "aif", "aifc", NULL };
static gchar *svx_exts[] = { "iff", "svx", NULL };
static gchar *paris_exts[] = { "paf", NULL };
static gchar *nist_exts[] = { "nist", NULL };
static gchar *voc_exts[] = { "voc", NULL };
static gchar *sds_exts[] = { "sds", NULL };
static gchar *ircam_exts[] = { "sf", NULL };
static gchar *w64_exts[] = { "w64", NULL };
static gchar *shn_exts[] = { "shn", NULL };
static gchar *ape_exts[] = { "ape", NULL };
static gchar *uri_exts[] = { "ram", NULL };
static gchar *sdp_exts[] = { "sdp", NULL };
static gchar *smil_exts[] = { "smil", NULL };
static gchar *html_exts[] = { "htm", "html", NULL };
static gchar *xml_exts[] = { "xml", NULL };
static gchar *jpeg_exts[] = { "jpg", "jpe", "jpeg", NULL };
static gchar *gif_exts[] = { "gif", NULL };
static gchar *png_exts[] = { "png", NULL };
static gchar *bmp_exts[] = { "bmp", NULL };
static gchar *tiff_exts[] = { "tif", "tiff", NULL };
static gchar *matroska_exts[] = { "mkv", "mka", NULL };
static gchar *mve_exts[] = { "mve", NULL };
static gchar *dv_exts[] = { "dv", "dif", NULL };
static gchar *amr_exts[] = { "amr", NULL };
static gchar *ilbc_exts[] = { "ilbc", NULL };
static gchar *sid_exts[] = { "sid", NULL };
static gchar *xcf_exts[] = { "xcf", NULL };
static gchar *mng_exts[] = { "mng", NULL };
static gchar *jng_exts[] = { "jng", NULL };
static gchar *xpm_exts[] = { "xpm", NULL };
static gchar *ras_exts[] = { "ras", NULL };
static gchar *bz2_exts[] = { "bz2", NULL };
static gchar *gz_exts[] = { "gz", NULL };
static gchar *zip_exts[] = { "zip", NULL };
static gchar *compress_exts[] = { "Z", NULL };
static gchar *m4a_exts[] = { "m4a", NULL };
static gchar *q3gp_exts[] = { "3gp", NULL };
static gchar *aac_exts[] = { "aac", NULL };
static gchar *spc_exts[] = { "spc", NULL };
static gchar *wavpack_exts[] = { "wv", "wvp", NULL };
static gchar *wavpack_correction_exts[] = { "wvc", NULL };
static gchar *rar_exts[] = { "rar", NULL };
static gchar *tar_exts[] = { "tar", NULL };
static gchar *ar_exts[] = { "a", NULL };
static gchar *msdos_exts[] = { "dll", "exe", "ocx", "sys", "scr",
"msstyles", "cpl", NULL
};
static gchar *flv_exts[] = { "flv", NULL };
static gchar *m4v_exts[] = { "m4v", NULL };
static gchar *h264_exts[] = { "h264", "x264", "264", NULL };
static gchar *nuv_exts[] = { "nuv", NULL };
static gchar *vivo_exts[] = { "viv", NULL };
static gchar *nsf_exts[] = { "nsf", NULL };
static gchar *mid_exts[] = { "mid", "midi", NULL };
static gchar *imelody_exts[] = { "imy", "ime", "imelody", NULL };
GST_DEBUG_CATEGORY_INIT (type_find_debug, "typefindfunctions",
GST_DEBUG_FG_GREEN | GST_DEBUG_BG_RED, "generic type find functions");
/* must use strings, macros don't accept initializers */
TYPE_FIND_REGISTER_START_WITH (plugin, "video/x-ms-asf", GST_RANK_SECONDARY,
asf_exts,
"\060\046\262\165\216\146\317\021\246\331\000\252\000\142\316\154", 16,
GST_TYPE_FIND_MAXIMUM);
TYPE_FIND_REGISTER (plugin, "audio/x-musepack", GST_RANK_PRIMARY,
musepack_type_find, musepack_exts, MUSEPACK_CAPS, NULL, NULL);
TYPE_FIND_REGISTER (plugin, "audio/x-au", GST_RANK_MARGINAL,
au_type_find, au_exts, AU_CAPS, NULL, NULL);
TYPE_FIND_REGISTER_RIFF (plugin, "video/x-msvideo", GST_RANK_PRIMARY,
avi_exts, "AVI ");
TYPE_FIND_REGISTER_RIFF (plugin, "audio/qcelp", GST_RANK_PRIMARY,
qcp_exts, "QLCM");
TYPE_FIND_REGISTER_RIFF (plugin, "video/x-cdxa", GST_RANK_PRIMARY,
cdxa_exts, "CDXA");
TYPE_FIND_REGISTER_START_WITH (plugin, "video/x-vcd", GST_RANK_PRIMARY,
cdxa_exts, "\000\377\377\377\377\377\377\377\377\377\377\000", 12,
GST_TYPE_FIND_MAXIMUM);
TYPE_FIND_REGISTER_START_WITH (plugin, "audio/x-imelody", GST_RANK_PRIMARY,
imelody_exts, "BEGIN:IMELODY", 13, GST_TYPE_FIND_MAXIMUM);
#if 0
TYPE_FIND_REGISTER_START_WITH (plugin, "video/x-smoke", GST_RANK_PRIMARY,
NULL, "\x80smoke\x00\x01\x00", 6, GST_TYPE_FIND_MAXIMUM);
#endif
TYPE_FIND_REGISTER (plugin, "audio/midi", GST_RANK_PRIMARY, mid_type_find,
mid_exts, MID_CAPS, NULL, NULL);
TYPE_FIND_REGISTER (plugin, "video/x-fli", GST_RANK_MARGINAL, flx_type_find,
flx_exts, FLX_CAPS, NULL, NULL);
TYPE_FIND_REGISTER (plugin, "application/x-id3v2", GST_RANK_PRIMARY + 103,
id3v2_type_find, id3_exts, ID3_CAPS, NULL, NULL);
TYPE_FIND_REGISTER (plugin, "application/x-id3v1", GST_RANK_PRIMARY + 101,
id3v1_type_find, id3_exts, ID3_CAPS, NULL, NULL);
TYPE_FIND_REGISTER (plugin, "application/x-apetag", GST_RANK_PRIMARY + 102,
apetag_type_find, apetag_exts, APETAG_CAPS, NULL, NULL);
TYPE_FIND_REGISTER (plugin, "audio/x-ttafile", GST_RANK_PRIMARY,
tta_type_find, tta_exts, TTA_CAPS, NULL, NULL);
TYPE_FIND_REGISTER (plugin, "audio/x-mod", GST_RANK_SECONDARY, mod_type_find,
mod_exts, MOD_CAPS, NULL, NULL);
TYPE_FIND_REGISTER (plugin, "audio/mpeg", GST_RANK_PRIMARY, mp3_type_find,
mp3_exts, MP3_CAPS, NULL, NULL);
TYPE_FIND_REGISTER (plugin, "audio/x-ac3", GST_RANK_PRIMARY, ac3_type_find,
ac3_exts, AC3_CAPS, NULL, NULL);
TYPE_FIND_REGISTER (plugin, "video/mpeg-sys", GST_RANK_PRIMARY,
mpeg_sys_type_find, mpeg_sys_exts, MPEG_SYS_CAPS, NULL, NULL);
TYPE_FIND_REGISTER (plugin, "video/mpegts", GST_RANK_PRIMARY,
mpeg_ts_type_find, mpeg_ts_exts, MPEGTS_CAPS, NULL, NULL);
TYPE_FIND_REGISTER (plugin, "application/ogg", GST_RANK_PRIMARY,
ogganx_type_find, ogg_exts, OGGANX_CAPS, NULL, NULL);
TYPE_FIND_REGISTER (plugin, "video/mpeg,elementary", GST_RANK_SECONDARY,
mpeg_video_type_find, mpeg_video_exts, MPEG_VIDEO_CAPS, NULL, NULL);
TYPE_FIND_REGISTER (plugin, "video/mpeg-stream", GST_RANK_MARGINAL,
mpeg_video_stream_type_find, mpeg_video_exts, MPEG_VIDEO_CAPS, NULL,
NULL);
TYPE_FIND_REGISTER (plugin, "video/mpeg4", GST_RANK_PRIMARY,
mpeg4_video_type_find, m4v_exts, MPEG_VIDEO_CAPS, NULL, NULL);
TYPE_FIND_REGISTER (plugin, "video/x-h264", GST_RANK_PRIMARY,
h264_video_type_find, h264_exts, MPEG_VIDEO_CAPS, NULL, NULL);
TYPE_FIND_REGISTER (plugin, "video/x-nuv", GST_RANK_SECONDARY,
nuv_type_find, nuv_exts, NUV_CAPS, NULL, NULL);
/* ISO formats */
TYPE_FIND_REGISTER (plugin, "audio/x-m4a", GST_RANK_PRIMARY, m4a_type_find,
m4a_exts, M4A_CAPS, NULL, NULL);
TYPE_FIND_REGISTER (plugin, "application/x-3gp", GST_RANK_PRIMARY,
q3gp_type_find, q3gp_exts, Q3GP_CAPS, NULL, NULL);
TYPE_FIND_REGISTER (plugin, "video/quicktime", GST_RANK_SECONDARY,
qt_type_find, qt_exts, QT_CAPS, NULL, NULL);
TYPE_FIND_REGISTER (plugin, "image/x-quicktime", GST_RANK_SECONDARY,
qtif_type_find, qtif_exts, QTIF_CAPS, NULL, NULL);
TYPE_FIND_REGISTER (plugin, "text/html", GST_RANK_SECONDARY, html_type_find,
html_exts, HTML_CAPS, NULL, NULL);
TYPE_FIND_REGISTER_START_WITH (plugin, "application/vnd.rn-realmedia",
GST_RANK_SECONDARY, rm_exts, ".RMF", 4, GST_TYPE_FIND_MAXIMUM);
TYPE_FIND_REGISTER_START_WITH (plugin, "application/x-pn-realaudio",
GST_RANK_SECONDARY, rm_exts, ".ra\375", 4, GST_TYPE_FIND_MAXIMUM);
TYPE_FIND_REGISTER (plugin, "application/x-shockwave-flash",
GST_RANK_SECONDARY, swf_type_find, swf_exts, SWF_CAPS, NULL, NULL);
TYPE_FIND_REGISTER_START_WITH (plugin, "video/x-flv", GST_RANK_SECONDARY,
flv_exts, "FLV", 3, GST_TYPE_FIND_MAXIMUM);
TYPE_FIND_REGISTER (plugin, "text/plain", GST_RANK_MARGINAL, utf8_type_find,
utf8_exts, UTF8_CAPS, NULL, NULL);
TYPE_FIND_REGISTER (plugin, "text/uri-list", GST_RANK_MARGINAL, uri_type_find,
uri_exts, URI_CAPS, NULL, NULL);
TYPE_FIND_REGISTER (plugin, "application/sdp", GST_RANK_SECONDARY,
sdp_type_find, sdp_exts, SDP_CAPS, NULL, NULL);
TYPE_FIND_REGISTER (plugin, "application/smil", GST_RANK_SECONDARY,
smil_type_find, smil_exts, SMIL_CAPS, NULL, NULL);
TYPE_FIND_REGISTER (plugin, "application/xml", GST_RANK_MARGINAL,
xml_type_find, xml_exts, GENERIC_XML_CAPS, NULL, NULL);
TYPE_FIND_REGISTER_RIFF (plugin, "audio/x-wav", GST_RANK_PRIMARY, wav_exts,
"WAVE");
TYPE_FIND_REGISTER (plugin, "audio/x-aiff", GST_RANK_SECONDARY,
aiff_type_find, aiff_exts, AIFF_CAPS, NULL, NULL);
TYPE_FIND_REGISTER (plugin, "audio/x-svx", GST_RANK_SECONDARY, svx_type_find,
svx_exts, SVX_CAPS, NULL, NULL);
TYPE_FIND_REGISTER (plugin, "audio/x-paris", GST_RANK_SECONDARY,
paris_type_find, paris_exts, PARIS_CAPS, NULL, NULL);
TYPE_FIND_REGISTER_START_WITH (plugin, "audio/x-nist", GST_RANK_SECONDARY,
nist_exts, "NIST", 4, GST_TYPE_FIND_MAXIMUM);
TYPE_FIND_REGISTER_START_WITH (plugin, "audio/x-voc", GST_RANK_SECONDARY,
voc_exts, "Creative", 8, GST_TYPE_FIND_MAXIMUM);
TYPE_FIND_REGISTER (plugin, "audio/x-sds", GST_RANK_SECONDARY, sds_type_find,
sds_exts, SDS_CAPS, NULL, NULL);
TYPE_FIND_REGISTER (plugin, "audio/x-ircam", GST_RANK_SECONDARY,
ircam_type_find, ircam_exts, IRCAM_CAPS, NULL, NULL);
TYPE_FIND_REGISTER_START_WITH (plugin, "audio/x-w64", GST_RANK_SECONDARY,
w64_exts, "riff", 4, GST_TYPE_FIND_MAXIMUM);
TYPE_FIND_REGISTER (plugin, "audio/x-shorten", GST_RANK_SECONDARY,
shn_type_find, shn_exts, SHN_CAPS, NULL, NULL);
TYPE_FIND_REGISTER (plugin, "application/x-ape", GST_RANK_SECONDARY,
ape_type_find, ape_exts, APE_CAPS, NULL, NULL);
TYPE_FIND_REGISTER (plugin, "image/jpeg", GST_RANK_PRIMARY + 15,
jpeg_type_find, jpeg_exts, JPEG_CAPS, NULL, NULL);
TYPE_FIND_REGISTER_START_WITH (plugin, "image/gif", GST_RANK_PRIMARY,
gif_exts, "GIF8", 4, GST_TYPE_FIND_MAXIMUM);
TYPE_FIND_REGISTER_START_WITH (plugin, "image/png", GST_RANK_PRIMARY + 14,
png_exts, "\211PNG\015\012\032\012", 8, GST_TYPE_FIND_MAXIMUM);
TYPE_FIND_REGISTER (plugin, "image/bmp", GST_RANK_PRIMARY, bmp_type_find,
bmp_exts, BMP_CAPS, NULL, NULL);
TYPE_FIND_REGISTER (plugin, "image/tiff", GST_RANK_PRIMARY, tiff_type_find,
tiff_exts, TIFF_CAPS, NULL, NULL);
TYPE_FIND_REGISTER (plugin, "video/x-matroska", GST_RANK_PRIMARY,
matroska_type_find, matroska_exts, MATROSKA_CAPS, NULL, NULL);
TYPE_FIND_REGISTER_START_WITH (plugin, "video/x-mve", GST_RANK_SECONDARY,
mve_exts, "Interplay MVE File\032\000\032\000\000\001\063\021", 26,
GST_TYPE_FIND_MAXIMUM);
TYPE_FIND_REGISTER (plugin, "video/x-dv", GST_RANK_SECONDARY, dv_type_find,
dv_exts, DV_CAPS, NULL, NULL);
TYPE_FIND_REGISTER_START_WITH (plugin, "audio/x-amr-nb-sh", GST_RANK_PRIMARY,
amr_exts, "#!AMR", 5, GST_TYPE_FIND_LIKELY);
TYPE_FIND_REGISTER_START_WITH (plugin, "audio/x-amr-wb-sh", GST_RANK_PRIMARY,
amr_exts, "#!AMR-WB", 7, GST_TYPE_FIND_MAXIMUM);
TYPE_FIND_REGISTER (plugin, "audio/iLBC-sh", GST_RANK_PRIMARY,
ilbc_type_find, ilbc_exts, ILBC_CAPS, NULL, NULL);
TYPE_FIND_REGISTER_START_WITH (plugin, "audio/x-sid", GST_RANK_MARGINAL,
sid_exts, "PSID", 4, GST_TYPE_FIND_MAXIMUM);
TYPE_FIND_REGISTER_START_WITH (plugin, "image/x-xcf", GST_RANK_SECONDARY,
xcf_exts, "gimp xcf", 8, GST_TYPE_FIND_MAXIMUM);
TYPE_FIND_REGISTER_START_WITH (plugin, "video/x-mng", GST_RANK_SECONDARY,
mng_exts, "\212MNG\015\012\032\012", 8, GST_TYPE_FIND_MAXIMUM);
TYPE_FIND_REGISTER_START_WITH (plugin, "image/x-jng", GST_RANK_SECONDARY,
jng_exts, "\213JNG\015\012\032\012", 8, GST_TYPE_FIND_MAXIMUM);
TYPE_FIND_REGISTER_START_WITH (plugin, "image/x-xpixmap", GST_RANK_SECONDARY,
xpm_exts, "/* XPM */", 9, GST_TYPE_FIND_MAXIMUM);
TYPE_FIND_REGISTER_START_WITH (plugin, "image/x-sun-raster",
GST_RANK_SECONDARY, ras_exts, "\131\246\152\225", 4,
GST_TYPE_FIND_MAXIMUM);
TYPE_FIND_REGISTER_START_WITH (plugin, "application/x-bzip",
GST_RANK_SECONDARY, bz2_exts, "BZh", 3, GST_TYPE_FIND_LIKELY);
TYPE_FIND_REGISTER_START_WITH (plugin, "application/x-gzip",
GST_RANK_SECONDARY, gz_exts, "\037\213", 2, GST_TYPE_FIND_LIKELY);
TYPE_FIND_REGISTER_START_WITH (plugin, "application/zip", GST_RANK_SECONDARY,
zip_exts, "PK\003\004", 4, GST_TYPE_FIND_LIKELY);
TYPE_FIND_REGISTER_START_WITH (plugin, "application/x-compress",
GST_RANK_SECONDARY, compress_exts, "\037\235", 2, GST_TYPE_FIND_LIKELY);
TYPE_FIND_REGISTER (plugin, "audio/x-flac", GST_RANK_PRIMARY,
flac_type_find, flac_exts, FLAC_CAPS, NULL, NULL);
TYPE_FIND_REGISTER (plugin, "audio/x-vorbis", GST_RANK_PRIMARY,
vorbis_type_find, NULL, VORBIS_CAPS, NULL, NULL);
TYPE_FIND_REGISTER (plugin, "video/x-theora", GST_RANK_PRIMARY,
theora_type_find, NULL, THEORA_CAPS, NULL, NULL);
TYPE_FIND_REGISTER (plugin, "application/x-ogm-video", GST_RANK_PRIMARY,
ogmvideo_type_find, NULL, OGMVIDEO_CAPS, NULL, NULL);
TYPE_FIND_REGISTER (plugin, "application/x-ogm-audio", GST_RANK_PRIMARY,
ogmaudio_type_find, NULL, OGMAUDIO_CAPS, NULL, NULL);
TYPE_FIND_REGISTER (plugin, "application/x-ogm-text", GST_RANK_PRIMARY,
ogmtext_type_find, NULL, OGMTEXT_CAPS, NULL, NULL);
TYPE_FIND_REGISTER (plugin, "audio/x-speex", GST_RANK_PRIMARY,
speex_type_find, NULL, SPEEX_CAPS, NULL, NULL);
TYPE_FIND_REGISTER (plugin, "application/x-ogg-skeleton", GST_RANK_PRIMARY,
oggskel_type_find, NULL, OGG_SKELETON_CAPS, NULL, NULL);
TYPE_FIND_REGISTER (plugin, "text/x-cmml", GST_RANK_PRIMARY, cmml_type_find,
NULL, CMML_CAPS, NULL, NULL);
TYPE_FIND_REGISTER_START_WITH (plugin, "application/x-executable",
GST_RANK_MARGINAL, NULL, "\177ELF", 4, GST_TYPE_FIND_MAXIMUM);
TYPE_FIND_REGISTER (plugin, "adts_mpeg_stream", GST_RANK_SECONDARY,
aac_type_find, aac_exts, AAC_CAPS, NULL, NULL);
TYPE_FIND_REGISTER_START_WITH (plugin, "audio/x-spc", GST_RANK_SECONDARY,
spc_exts, "SNES-SPC700 Sound File Data", 27, GST_TYPE_FIND_MAXIMUM);
TYPE_FIND_REGISTER (plugin, "audio/x-wavpack", GST_RANK_SECONDARY,
wavpack_type_find, wavpack_exts, WAVPACK_CAPS, NULL, NULL);
TYPE_FIND_REGISTER (plugin, "audio/x-wavpack-correction", GST_RANK_SECONDARY,
wavpack_type_find, wavpack_correction_exts, WAVPACK_CORRECTION_CAPS, NULL,
NULL);
TYPE_FIND_REGISTER_START_WITH (plugin, "application/x-rar",
GST_RANK_SECONDARY, rar_exts, "Rar!", 4, GST_TYPE_FIND_LIKELY);
TYPE_FIND_REGISTER (plugin, "application/x-tar", GST_RANK_SECONDARY,
tar_type_find, tar_exts, TAR_CAPS, NULL, NULL);
TYPE_FIND_REGISTER (plugin, "application/x-ar", GST_RANK_SECONDARY,
ar_type_find, ar_exts, AR_CAPS, NULL, NULL);
TYPE_FIND_REGISTER (plugin, "application/x-ms-dos-executable",
GST_RANK_SECONDARY, msdos_type_find, msdos_exts, MSDOS_CAPS, NULL, NULL);
TYPE_FIND_REGISTER (plugin, "video/x-dirac", GST_RANK_PRIMARY,
dirac_type_find, NULL, DIRAC_CAPS, NULL, NULL);
TYPE_FIND_REGISTER (plugin, "multipart/x-mixed-replace", GST_RANK_SECONDARY,
multipart_type_find, NULL, MULTIPART_CAPS, NULL, NULL);
TYPE_FIND_REGISTER (plugin, "application/x-mmsh", GST_RANK_SECONDARY,
mmsh_type_find, NULL, MMSH_CAPS, NULL, NULL);
TYPE_FIND_REGISTER (plugin, "video/vivo", GST_RANK_SECONDARY,
vivo_type_find, vivo_exts, VIVO_CAPS, NULL, NULL);
TYPE_FIND_REGISTER_START_WITH (plugin, "audio/x-nsf",
GST_RANK_SECONDARY, nsf_exts, "NESM\x1a", 5, GST_TYPE_FIND_MAXIMUM);
return TRUE;
}
GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
GST_VERSION_MINOR,
"typefindfunctions",
"default typefind functions",
plugin_init, VERSION, GST_LICENSE, GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN);
#ifdef __SYMBIAN32__
EXPORT_C
#endif
GstPluginDesc* _GST_PLUGIN_DESC()
{
return &gst_plugin_desc;
}