/* GStreamer * Copyright (C) 2003 Benjamion Otte * * 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 #include #include #include #include #include #include #include #include GST_DEBUG_CATEGORY_STATIC (type_find_debug); #define GST_CAT_DEFAULT type_find_debug /*** text/plain ****************************************************************/ static GstStaticCaps utf8_caps = GST_STATIC_CAPS ("text/plain"); #define UTF8_CAPS gst_static_caps_get(&utf8_caps) static void utf8_type_find (GstTypeFind * tf, gpointer unused) { guint8 *data; /* randomly decided values */ guint size = 1024; /* starting size */ guint probability = 95; /* starting probability */ guint step = 10; /* how much we reduce probability in each iteration */ while (probability > step) { data = gst_type_find_peek (tf, 0, 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 */ gst_type_find_suggest (tf, probability, UTF8_CAPS); } return; } size /= 2; probability -= step; } } /*** 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); } } /*** 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 id3_type_find (GstTypeFind * tf, gpointer unused) { /* detect ID3v2 first */ guint8 *data = gst_type_find_peek (tf, 0, 10); if (data) { /* detect valid header */ if (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); return; } } 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/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)) static void aac_type_find (GstTypeFind * tf, gpointer unused) { guint8 *data = gst_type_find_peek (tf, 0, 2); /* detect adts header * note that this is a pretty lame typefind method (14 bits, 0.006%), so * we'll only use LIKELY */ if (data) { if (data[0] == 0xFF && (data[1] & 0xF6) == 0xF0) { gboolean mpegversion = (data[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_MAXIMUM, 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 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 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) { 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 == 15 || bitrate == 0) 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; bitrate = mp3types_bitrates[version == 3 ? 0 : 1][layer - 1][bitrate]; samplerate = mp3types_freqs[version > 0 ? version - 1 : 0][samplerate]; /* calculating */ 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) static void mp3_type_find (GstTypeFind * tf, gpointer unused) { guint64 length = gst_type_find_get_length (tf); gint try; guint8 *data = NULL; guint size; guint64 skipped; for (try = 0; try < 2; try++) { guint64 start_off = (try == 0) ? 0 : length / 2; if (try != 0 && start_off == 0) return; 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; } 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, prev_channels = 0, prev_samplerate = 0; if (offset + 4 <= skipped + size) { 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))) { GST_LOG ("%d. header at offset %" G_GUINT64_FORMAT " (0x%X) was not an mp3 header", found + 1, offset, (guint) offset); 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%X)", found, offset, (guint) 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 (probability < GST_TYPE_FIND_MINIMUM) probability = GST_TYPE_FIND_MINIMUM; probability /= (try + 1); GST_INFO ("audio/mpeg calculated %u = %u * %u / %u * (%u - %u) / %u", probability, GST_TYPE_FIND_MAXIMUM, found, GST_MP3_TYPEFIND_TRY_HEADERS, GST_MP3_TYPEFIND_TRY_SYNC, 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) { probability = probability * 4 / 5; } else if (memcmp (head_data, "TAG", 3) == 0) { probability = 0; } g_assert (probability <= GST_TYPE_FIND_MAXIMUM); if (probability > 0) { GstCaps *caps; g_assert (layer > 0); caps = gst_caps_copy (MP3_CAPS); gst_structure_set (gst_caps_get_structure (caps, 0), "layer", G_TYPE_INT, layer, 0); gst_type_find_suggest (tf, probability, caps); gst_caps_unref (caps); } return; } } data++; skipped++; size--; } } } /*** audio/x-ac3 **************************************************************/ static GstStaticCaps ac3_caps = GST_STATIC_CAPS ("audio/x-ac3"); #define AC3_CAPS (gst_static_caps_get(&ac3_caps)) static void ac3_type_find (GstTypeFind * tf, gpointer unused) { guint8 *data = gst_type_find_peek (tf, 0, 2); if (data) { /* pretty lame method... */ if (data[0] == 0x0b && data[1] == 0x77) { gst_type_find_suggest (tf, GST_TYPE_FIND_POSSIBLE, AC3_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) && \ (((guint8 *)data)[3] == 0xBA)) #define IS_MPEG_SYSTEM_HEADER(data) ((((guint8 *)data)[0] == 0x00) && \ (((guint8 *)data)[1] == 0x00) && \ (((guint8 *)data)[2] == 0x01) && \ (((guint8 *)data)[3] == 0xBB)) #define IS_MPEG_PACKET_HEADER(data) ((((guint8 *)data)[0] == 0x00) && \ (((guint8 *)data)[1] == 0x00) && \ (((guint8 *)data)[2] == 0x01) && \ ((((guint8 *)data)[3] & 0x80) == 0x80)) #define IS_MPEG_PES_HEADER(data) ((((guint8 *)data)[0] == 0x00) && \ (((guint8 *)data)[1] == 0x00) && \ (((guint8 *)data)[2] == 0x01) && \ ((((guint8 *)data)[3] == 0xE0) || \ (((guint8 *)data)[3] == 0xC0) || \ (((guint8 *)data)[3] == 0xBD))) static void mpeg2_sys_type_find (GstTypeFind * tf, gpointer unused) { guint8 *data = gst_type_find_peek (tf, 0, 5); if (data && IS_MPEG_HEADER (data)) { if ((data[4] & 0xC0) == 0x40) { /* type 2 */ GstCaps *caps = gst_caps_copy (MPEG_SYS_CAPS); gst_structure_set (gst_caps_get_structure (caps, 0), "mpegversion", G_TYPE_INT, 2, 0); gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, caps); } else if ((data[4] & 0xF0) == 0x20) { GstCaps *caps = gst_caps_copy (MPEG_SYS_CAPS); gst_structure_set (gst_caps_get_structure (caps, 0), "mpegversion", G_TYPE_INT, 1, 0); gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, caps); gst_caps_unref (caps); } } else if (data && IS_MPEG_PES_HEADER (data)) { /* PES stream */ GstCaps *caps = gst_caps_copy (MPEG_SYS_CAPS); gst_structure_set (gst_caps_get_structure (caps, 0), "mpegversion", G_TYPE_INT, 2, 0); gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, caps); } }; /* ATTANTION: ugly return value: * 0 - invalid data * 1 - not enough data * anything else - size until next package */ static guint mpeg1_parse_header (GstTypeFind * tf, guint64 offset) { guint8 *data = gst_type_find_peek (tf, offset, 4); guint size; if (!data) { GST_LOG ("couldn't get MPEG header bytes"); return 1; } if (data[0] != 0 || data[1] != 0 || data[2] != 1) { return 0; } offset += 4; switch (data[3]) { case 0xBA: /* pack header */ data = gst_type_find_peek (tf, offset, 8); if (!data) { GST_LOG ("couldn't get MPEG pack header bytes"); return 1; } size = 12; /* check marker bits */ if ((data[0] & 0xF1) != 0x21 || (data[2] & 0x01) != 0x01 || (data[4] & 0x01) != 0x01 || (data[5] & 0x80) != 0x80 || (data[7] & 0x01) != 0x01) return 0; break; case 0xB9: /* ISO end code */ size = 4; break; case 0xBB: /* system header */ data = gst_type_find_peek (tf, offset, 2); if (!data) { GST_LOG ("couldn't get MPEG pack header bytes"); return 1; } size = GST_READ_UINT16_BE (data) + 6; offset += 2; data = gst_type_find_peek (tf, offset, size - 6); if (!data) { GST_LOG ("couldn't get MPEG pack header bytes"); return 1; } /* check marker bits */ if ((data[0] & 0x80) != 0x80 || (data[2] & 0x01) != 0x01 || (data[4] & 0x20) != 0x20) return 0; /* check stream marker bits */ for (offset = 6; offset < (size - 6); offset += 3) { if (data[offset] <= 0xBB || (data[offset + 1] & 0xC0) != 0xC0) return 0; } break; default: if (data[3] < 0xB9) return 0; data = gst_type_find_peek (tf, offset, 2); if (!data) { GST_LOG ("couldn't get MPEG pack header bytes"); return 1; } size = GST_READ_UINT16_BE (data) + 6; /* FIXME: we could check PTS/DTS marker bits here... (bit overkill) */ break; } return size; } /* 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 GST_MPEG_TYPEFIND_TRY_HEADERS headers are identified: * 1/2^(32*GST_MPEG_TYPEFIND_TRY_HEADERS) * chance that this happens in GST_MPEG_TYPEFIND_TRY_SYNC bytes: * 1-(1+1/2^(32*GST_MPEG_TYPEFIND_TRY_HEADERS)^GST_MPEG_TYPEFIND_TRY_SYNC) * for current values: * 1-(1+1/2^(32*4)^101024) * = */ #define GST_MPEG_TYPEFIND_TRY_HEADERS 4 #define GST_MPEG_TYPEFIND_TRY_SYNC (100 * 1024) /* 100kB */ #define GST_MPEG_TYPEFIND_SYNC_SIZE 2048 static void mpeg1_sys_type_find (GstTypeFind * tf, gpointer unused) { guint8 *data = NULL; guint size = 0; guint64 skipped = 0; GstCaps *caps; while (skipped < GST_MPEG_TYPEFIND_TRY_SYNC) { if (size < 4) { data = gst_type_find_peek (tf, skipped, GST_MPEG_TYPEFIND_SYNC_SIZE); if (!data) break; size = GST_MPEG_TYPEFIND_SYNC_SIZE; } if (IS_MPEG_HEADER (data)) { /* found packet start code */ guint found = 0; guint packet_size = 0; guint64 offset = skipped; while (found < GST_MPEG_TYPEFIND_TRY_HEADERS) { packet_size = mpeg1_parse_header (tf, offset); if (packet_size <= 1) break; offset += packet_size; found++; } g_assert (found <= GST_MPEG_TYPEFIND_TRY_HEADERS); if (found == GST_MPEG_TYPEFIND_TRY_HEADERS || packet_size == 1) { caps = gst_caps_copy (MPEG_SYS_CAPS); gst_structure_set (gst_caps_get_structure (caps, 0), "mpegversion", G_TYPE_INT, 1, 0); gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM - 1, caps); gst_caps_unref (caps); return; } } data++; skipped++; size--; } } /*** 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, 0); gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM - 1, 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, 0); 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; } /* are we a sequence (0xB3) or GOP (0xB8) header? */ if (data[0] == 0x0 && data[1] == 0x0 && data[2] == 0x1 && (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 (data[0] == 0x0 && data[1] == 0x0 && data[2] == 0x1 && 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 ((data[0] == 0x0 && data[1] == 0x0 && data[2] == 0x1 && data[3] == 0x1) || (data[1] == 0x0 && data[2] == 0x0 && data[3] == 0x1 && data[4] == 0x1)) { size -= 4; data += 4; skipped += 4; found += 1; continue; } } size--; data++; skipped++; } } /*** 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) { if (STRNCMP (&data[4], "wide", 4) != 0 && STRNCMP (&data[4], "moov", 4) != 0 && STRNCMP (&data[4], "mdat", 4) != 0 && STRNCMP (&data[4], "pnot", 4) != 0 && STRNCMP (&data[4], "PICT", 4) != 0 && STRNCMP (&data[4], "ftyp", 4) != 0 && STRNCMP (&data[4], "free", 4) != 0 && STRNCMP (&data[4], "skip", 4) != 0) { tip = 0; break; } if (tip == 0) { tip = GST_TYPE_FIND_LIKELY; } else { tip = GST_TYPE_FIND_MAXIMUM; 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); } }; /*** 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-aiff *********************************************/ 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_MAXIMUM, APE_CAPS); } } /*** 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) { 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) { guint8 *data = gst_type_find_peek (tf, 4, 8); if (data && memcmp (data, "ftyp3gp4", 8) == 0) { gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, Q3GP_CAPS); } } /*** 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"); static GstStaticCaps ogganx_caps = GST_STATIC_CAPS ("application/ogg; application/x-annodex"); #define OGGANX_CAPS (gst_static_caps_get(&ogganx_caps)) static void ogganx_type_find (GstTypeFind * tf, gpointer private) { guint8 *data = gst_type_find_peek (tf, 28, 8); gboolean is_annodex = FALSE; if ((data != NULL) && (memcmp (data, "fishead\0", 8) == 0)) { is_annodex = TRUE; } data = gst_type_find_peek (tf, 0, 4); if ((data != NULL) && (memcmp (data, "OggS", 4) == 0)) { if (is_annodex == TRUE) { gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, gst_static_caps_get (&annodex_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 (*((guint32 *) 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"); #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) { 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; data += 2; if (GST_READ_UINT16_LE (data) != 0) return; gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, CMML_CAPS); } } /*** generic typefind for streams that have some data at a specific position***/ typedef struct { 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); } } #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 = (gpointer)_data; \ sw_data->size = _size; \ sw_data->probability = _probability; \ sw_data->caps = gst_caps_new_simple (name, NULL); \ TYPE_FIND_REGISTER (plugin, name, rank, start_with_type_find, \ ext, sw_data->caps, 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); \ TYPE_FIND_REGISTER (plugin, name, rank, riff_type_find, \ ext, sw_data->caps, sw_data); \ }G_END_DECLS /*** plugin initialization ****************************************************/ #define TYPE_FIND_REGISTER(plugin,name,rank,func,ext,caps,priv) G_BEGIN_DECLS{\ if (!gst_type_find_register (plugin, name, rank, func, ext, caps, priv))\ 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 */ static gchar *asf_exts[] = { "asf", "wm", "wma", "wmv", NULL }; static gchar *au_exts[] = { "au", "snd", NULL }; static gchar *avi_exts[] = { "avi", 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", NULL }; 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 *ogg_exts[] = { "anx", "ogg", "ogm", NULL }; static gchar *qt_exts[] = { "mov", 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 *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 *dv_exts[] = { "dv", "dif", NULL }; static gchar *amr_exts[] = { "amr", 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 }; 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); /* -1 so id3v1 or apev1/2 are detected with higher preference */ TYPE_FIND_REGISTER_START_WITH (plugin, "audio/x-musepack", GST_RANK_PRIMARY, musepack_exts, "MP+", 3, GST_TYPE_FIND_MAXIMUM - 1); TYPE_FIND_REGISTER_START_WITH (plugin, "audio/x-au", GST_RANK_MARGINAL, au_exts, ".snd", 4, GST_TYPE_FIND_MAXIMUM); TYPE_FIND_REGISTER_START_WITH (plugin, "audio/x-au", GST_RANK_MARGINAL, au_exts, "dns.", 4, GST_TYPE_FIND_MAXIMUM); TYPE_FIND_REGISTER_RIFF (plugin, "video/x-msvideo", GST_RANK_PRIMARY, avi_exts, "AVI "); 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-flac", GST_RANK_PRIMARY, flac_exts, "fLaC", 4, GST_TYPE_FIND_MAXIMUM); TYPE_FIND_REGISTER (plugin, "video/x-fli", GST_RANK_MARGINAL, flx_type_find, flx_exts, FLX_CAPS, NULL); TYPE_FIND_REGISTER (plugin, "application/x-id3", GST_RANK_PRIMARY, id3_type_find, id3_exts, ID3_CAPS, NULL); TYPE_FIND_REGISTER (plugin, "application/x-apetag", GST_RANK_PRIMARY, apetag_type_find, apetag_exts, APETAG_CAPS, NULL); TYPE_FIND_REGISTER (plugin, "audio/x-ttafile", GST_RANK_PRIMARY, tta_type_find, tta_exts, TTA_CAPS, NULL); TYPE_FIND_REGISTER (plugin, "audio/x-mod", GST_RANK_SECONDARY, mod_type_find, mod_exts, MOD_CAPS, NULL); TYPE_FIND_REGISTER (plugin, "audio/mpeg", GST_RANK_PRIMARY, mp3_type_find, mp3_exts, MP3_CAPS, NULL); TYPE_FIND_REGISTER (plugin, "audio/x-ac3", GST_RANK_PRIMARY, ac3_type_find, ac3_exts, AC3_CAPS, NULL); TYPE_FIND_REGISTER (plugin, "video/mpeg1", GST_RANK_PRIMARY, mpeg1_sys_type_find, mpeg_sys_exts, MPEG_SYS_CAPS, NULL); TYPE_FIND_REGISTER (plugin, "video/mpeg2", GST_RANK_SECONDARY, mpeg2_sys_type_find, mpeg_sys_exts, MPEG_SYS_CAPS, NULL); TYPE_FIND_REGISTER (plugin, "application/ogg", GST_RANK_PRIMARY, ogganx_type_find, ogg_exts, OGGANX_CAPS, NULL); TYPE_FIND_REGISTER (plugin, "video/mpeg", GST_RANK_SECONDARY, mpeg_video_type_find, mpeg_video_exts, MPEG_VIDEO_CAPS, NULL); TYPE_FIND_REGISTER (plugin, "video/mpeg-stream", GST_RANK_MARGINAL, mpeg_video_stream_type_find, mpeg_video_exts, MPEG_VIDEO_CAPS, NULL); TYPE_FIND_REGISTER (plugin, "video/quicktime", GST_RANK_SECONDARY, qt_type_find, qt_exts, QT_CAPS, 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 (plugin, "application/x-shockwave-flash", GST_RANK_SECONDARY, swf_type_find, swf_exts, SWF_CAPS, NULL); TYPE_FIND_REGISTER (plugin, "text/plain", GST_RANK_MARGINAL, utf8_type_find, utf8_exts, UTF8_CAPS, NULL); TYPE_FIND_REGISTER (plugin, "text/uri-list", GST_RANK_MARGINAL, uri_type_find, uri_exts, URI_CAPS, 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); TYPE_FIND_REGISTER (plugin, "audio/x-svx", GST_RANK_SECONDARY, svx_type_find, svx_exts, SVX_CAPS, NULL); TYPE_FIND_REGISTER_START_WITH (plugin, "audio/x-paris", GST_RANK_SECONDARY, paris_exts, " paf", 4, GST_TYPE_FIND_MAXIMUM); TYPE_FIND_REGISTER_START_WITH (plugin, "audio/x-paris", GST_RANK_SECONDARY, paris_exts, "fap ", 4, GST_TYPE_FIND_MAXIMUM); 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); TYPE_FIND_REGISTER (plugin, "audio/x-ircam", GST_RANK_SECONDARY, ircam_type_find, ircam_exts, IRCAM_CAPS, 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); TYPE_FIND_REGISTER (plugin, "application/x-ape", GST_RANK_SECONDARY, ape_type_find, ape_exts, APE_CAPS, NULL); TYPE_FIND_REGISTER (plugin, "image/jpeg", GST_RANK_PRIMARY, jpeg_type_find, jpeg_exts, JPEG_CAPS, 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, 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); TYPE_FIND_REGISTER (plugin, "image/tiff", GST_RANK_PRIMARY, tiff_type_find, tiff_exts, TIFF_CAPS, NULL); TYPE_FIND_REGISTER (plugin, "video/x-matroska", GST_RANK_PRIMARY, matroska_type_find, matroska_exts, MATROSKA_CAPS, NULL); TYPE_FIND_REGISTER (plugin, "video/x-dv", GST_RANK_SECONDARY, dv_type_find, dv_exts, DV_CAPS, 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_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-vorbis", GST_RANK_PRIMARY, vorbis_type_find, NULL, VORBIS_CAPS, NULL); TYPE_FIND_REGISTER (plugin, "video/x-theora", GST_RANK_PRIMARY, theora_type_find, NULL, THEORA_CAPS, NULL); TYPE_FIND_REGISTER (plugin, "application/x-ogm-video", GST_RANK_PRIMARY, ogmvideo_type_find, NULL, OGMVIDEO_CAPS, NULL); TYPE_FIND_REGISTER (plugin, "application/x-ogm-audio", GST_RANK_PRIMARY, ogmaudio_type_find, NULL, OGMAUDIO_CAPS, NULL); TYPE_FIND_REGISTER (plugin, "application/x-ogm-text", GST_RANK_PRIMARY, ogmtext_type_find, NULL, OGMTEXT_CAPS, NULL); TYPE_FIND_REGISTER (plugin, "audio/x-speex", GST_RANK_PRIMARY, speex_type_find, NULL, SPEEX_CAPS, NULL); TYPE_FIND_REGISTER (plugin, "application/x-ogg-skeleton", GST_RANK_PRIMARY, oggskel_type_find, NULL, OGG_SKELETON_CAPS, NULL); TYPE_FIND_REGISTER (plugin, "text/x-cmml", GST_RANK_PRIMARY, cmml_type_find, NULL, CMML_CAPS, NULL); TYPE_FIND_REGISTER (plugin, "audio/x-m4a", GST_RANK_PRIMARY, m4a_type_find, m4a_exts, M4A_CAPS, NULL); TYPE_FIND_REGISTER (plugin, "application/x-3gp", GST_RANK_PRIMARY, q3gp_type_find, q3gp_exts, Q3GP_CAPS, 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); return TRUE; } GST_PLUGIN_DEFINE (GST_VERSION_MAJOR, GST_VERSION_MINOR, "typefindfunctions", "default typefind functions", plugin_init, VERSION, GST_LICENSE, GST_PACKAGE, GST_ORIGIN)