/* GStreamer Ogg Granulepos Mapping Utility Functions * Copyright (C) 2006 Tim-Philipp Müller * Copyright (C) 2009 David Schleef * * 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 "gstoggstream.h" #include "dirac_parse.h" #include "vorbis_parse.h" #include #include #include GST_DEBUG_CATEGORY_EXTERN (gst_ogg_demux_debug); GST_DEBUG_CATEGORY_EXTERN (gst_ogg_demux_setup_debug); #define GST_CAT_DEFAULT gst_ogg_demux_debug typedef struct _GstOggMap GstOggMap; typedef gboolean (*GstOggMapSetupFunc) (GstOggStream * pad, ogg_packet * packet); typedef GstClockTime (*GstOggMapToTimeFunc) (GstOggStream * pad, gint64 granulepos); typedef gint64 (*GstOggMapToGranuleFunc) (GstOggStream * pad, gint64 granulepos); typedef gint64 (*GstOggMapToGranuleposFunc) (GstOggStream * pad, gint64 granule, gint64 keyframe_granule); /* returns TRUE if the granulepos denotes a key frame */ typedef gboolean (*GstOggMapIsKeyFrameFunc) (GstOggStream * pad, gint64 granulepos); /* returns TRUE if the given packet is a stream header packet */ typedef gboolean (*GstOggMapIsHeaderPacketFunc) (GstOggStream * pad, ogg_packet * packet); typedef gint64 (*GstOggMapPacketDurationFunc) (GstOggStream * pad, ogg_packet * packet); typedef gint64 (*GstOggMapGranuleposToKeyGranuleFunc) (GstOggStream * pad, gint64 granulepos); #define SKELETON_FISBONE_MIN_SIZE 52 #define SKELETON_FISHEAD_3_3_MIN_SIZE 112 #define SKELETON_FISHEAD_4_0_MIN_SIZE 80 struct _GstOggMap { const gchar *id; int id_length; int min_packet_size; const gchar *media_type; GstOggMapSetupFunc setup_func; GstOggMapToGranuleFunc granulepos_to_granule_func; GstOggMapToGranuleposFunc granule_to_granulepos_func; GstOggMapIsKeyFrameFunc is_key_frame_func; GstOggMapIsHeaderPacketFunc is_header_func; GstOggMapPacketDurationFunc packet_duration_func; GstOggMapGranuleposToKeyGranuleFunc granulepos_to_key_granule_func; }; extern const GstOggMap mappers[]; GstClockTime gst_ogg_stream_get_packet_start_time (GstOggStream * pad, ogg_packet * packet) { int duration; if (packet->granulepos == -1) { return GST_CLOCK_TIME_NONE; } duration = gst_ogg_stream_get_packet_duration (pad, packet); if (duration == -1) { return GST_CLOCK_TIME_NONE; } return gst_ogg_stream_granule_to_time (pad, gst_ogg_stream_granulepos_to_granule (pad, packet->granulepos) - duration); } GstClockTime gst_ogg_stream_get_start_time_for_granulepos (GstOggStream * pad, gint64 granulepos) { if (pad->frame_size == 0) return GST_CLOCK_TIME_NONE; return gst_ogg_stream_granule_to_time (pad, gst_ogg_stream_granulepos_to_granule (pad, granulepos)); } GstClockTime gst_ogg_stream_get_end_time_for_granulepos (GstOggStream * pad, gint64 granulepos) { return gst_ogg_stream_granule_to_time (pad, gst_ogg_stream_granulepos_to_granule (pad, granulepos)); } GstClockTime gst_ogg_stream_granule_to_time (GstOggStream * pad, gint64 granule) { if (granule == 0 || pad->granulerate_n == 0 || pad->granulerate_d == 0) return 0; return gst_util_uint64_scale (granule, GST_SECOND * pad->granulerate_d, pad->granulerate_n); } gint64 gst_ogg_stream_granulepos_to_granule (GstOggStream * pad, gint64 granulepos) { if (granulepos == -1 || granulepos == 0) { return granulepos; } if (mappers[pad->map].granulepos_to_granule_func == NULL) { GST_WARNING ("Failed to convert granulepos to granule"); return -1; } return mappers[pad->map].granulepos_to_granule_func (pad, granulepos); } gint64 gst_ogg_stream_granulepos_to_key_granule (GstOggStream * pad, gint64 granulepos) { if (mappers[pad->map].granulepos_to_key_granule_func) return mappers[pad->map].granulepos_to_key_granule_func (pad, granulepos); if (granulepos == -1 || granulepos == 0) { return granulepos; } return granulepos >> pad->granuleshift; } gint64 gst_ogg_stream_granule_to_granulepos (GstOggStream * pad, gint64 granule, gint64 keyframe_granule) { if (granule == -1 || granule == 0) { return granule; } if (mappers[pad->map].granule_to_granulepos_func == NULL) { GST_WARNING ("Failed to convert granule to granulepos"); return -1; } return mappers[pad->map].granule_to_granulepos_func (pad, granule, keyframe_granule); } #if 0 gboolean gst_ogg_stream_packet_granulepos_is_key_frame (GstOggStream * pad, gint64 granulepos) { if (granulepos == -1) { return FALSE; } if (mappers[pad->map].is_key_frame_func == NULL) { GST_WARNING ("Failed to determine key frame"); return FALSE; } return mappers[pad->map].is_key_frame_func (pad, granulepos); } #endif gboolean gst_ogg_stream_packet_is_header (GstOggStream * pad, ogg_packet * packet) { if (mappers[pad->map].is_header_func == NULL) { GST_WARNING ("Failed to determine header"); return FALSE; } return mappers[pad->map].is_header_func (pad, packet); } gint64 gst_ogg_stream_get_packet_duration (GstOggStream * pad, ogg_packet * packet) { if (mappers[pad->map].packet_duration_func == NULL) { GST_WARNING ("Failed to determine packet duration"); return -1; } return mappers[pad->map].packet_duration_func (pad, packet); } /* some generic functions */ static gboolean is_keyframe_true (GstOggStream * pad, gint64 granulepos) { return TRUE; } static gint64 granulepos_to_granule_default (GstOggStream * pad, gint64 granulepos) { gint64 keyindex, keyoffset; if (pad->granuleshift != 0) { keyindex = granulepos >> pad->granuleshift; keyoffset = granulepos - (keyindex << pad->granuleshift); return keyindex + keyoffset; } else { return granulepos; } } static gint64 granule_to_granulepos_default (GstOggStream * pad, gint64 granule, gint64 keyframe_granule) { gint64 keyoffset; if (pad->granuleshift != 0) { keyoffset = granule - keyframe_granule; return (keyframe_granule << pad->granuleshift) | keyoffset; } else { return granule; } } #ifdef unused static gboolean is_header_unknown (GstOggStream * pad, ogg_packet * packet) { GST_WARNING ("don't know how to detect header"); return FALSE; } #endif static gboolean is_header_true (GstOggStream * pad, ogg_packet * packet) { return TRUE; } static gboolean is_header_count (GstOggStream * pad, ogg_packet * packet) { if (pad->n_header_packets_seen < pad->n_header_packets) { return TRUE; } return FALSE; } static gint64 packet_duration_constant (GstOggStream * pad, ogg_packet * packet) { return pad->frame_size; } /* theora */ static gboolean setup_theora_mapper (GstOggStream * pad, ogg_packet * packet) { guint8 *data = packet->packet; guint w, h, par_d, par_n; w = GST_READ_UINT24_BE (data + 14) & 0xFFFFF0; h = GST_READ_UINT24_BE (data + 17) & 0xFFFFF0; pad->granulerate_n = GST_READ_UINT32_BE (data + 22); pad->granulerate_d = GST_READ_UINT32_BE (data + 26); par_n = GST_READ_UINT24_BE (data + 30); par_d = GST_READ_UINT24_BE (data + 33); GST_LOG ("fps = %d/%d, PAR = %u/%u, width = %u, height = %u", pad->granulerate_n, pad->granulerate_d, par_n, par_d, w, h); /* 2 bits + 3 bits = 5 bits KFGSHIFT */ pad->granuleshift = ((GST_READ_UINT8 (data + 40) & 0x03) << 3) + (GST_READ_UINT8 (data + 41) >> 5); pad->n_header_packets = 3; pad->frame_size = 1; pad->bitrate = GST_READ_UINT24_BE (data + 37); GST_LOG ("bit rate: %d", pad->bitrate); if (pad->granulerate_n == 0 || pad->granulerate_d == 0) { GST_WARNING ("frame rate %d/%d", pad->granulerate_n, pad->granulerate_d); return FALSE; } pad->caps = gst_caps_new_simple ("video/x-theora", NULL); if (w > 0 && h > 0) { gst_caps_set_simple (pad->caps, "width", G_TYPE_INT, w, "height", G_TYPE_INT, h, NULL); } /* PAR of 0:N, N:0 and 0:0 is allowed and maps to 1:1 */ if (par_n == 0 || par_d == 0) par_n = par_d = 1; /* only add framerate now so caps look prettier, with width/height first */ gst_caps_set_simple (pad->caps, "framerate", GST_TYPE_FRACTION, pad->granulerate_n, pad->granulerate_d, "pixel-aspect-ratio", GST_TYPE_FRACTION, par_n, par_d, NULL); return TRUE; } static gint64 granulepos_to_granule_theora (GstOggStream * pad, gint64 granulepos) { gint64 keyindex, keyoffset; if (pad->granuleshift != 0) { keyindex = granulepos >> pad->granuleshift; keyoffset = granulepos - (keyindex << pad->granuleshift); if (keyoffset == 0) { pad->theora_has_zero_keyoffset = TRUE; } if (pad->theora_has_zero_keyoffset) { keyoffset++; } return keyindex + keyoffset; } else { return granulepos; } } static gboolean is_keyframe_theora (GstOggStream * pad, gint64 granulepos) { gint64 frame_mask; if (granulepos == (gint64) - 1) return FALSE; frame_mask = (1 << (pad->granuleshift + 1)) - 1; return ((granulepos & frame_mask) == 0); } static gboolean is_header_theora (GstOggStream * pad, ogg_packet * packet) { return (packet->bytes > 0 && (packet->packet[0] & 0x80) == 0x80); } /* dirac */ static gboolean setup_dirac_mapper (GstOggStream * pad, ogg_packet * packet) { int ret; DiracSequenceHeader header; ret = dirac_sequence_header_parse (&header, packet->packet + 13, packet->bytes - 13); if (ret == 0) { GST_DEBUG ("Failed to parse Dirac sequence header"); return FALSE; } pad->granulerate_n = header.frame_rate_numerator * 2; pad->granulerate_d = header.frame_rate_denominator; pad->granuleshift = 22; pad->n_header_packets = 1; pad->frame_size = 2; if (header.interlaced_coding != 0) { GST_DEBUG ("non-progressive Dirac coding not implemented"); return FALSE; } pad->caps = gst_caps_new_simple ("video/x-dirac", "width", G_TYPE_INT, header.width, "height", G_TYPE_INT, header.height, "interlaced", G_TYPE_BOOLEAN, header.interlaced, "pixel-aspect-ratio", GST_TYPE_FRACTION, header.aspect_ratio_numerator, header.aspect_ratio_denominator, "framerate", GST_TYPE_FRACTION, header.frame_rate_numerator, header.frame_rate_denominator, NULL); return TRUE; } #define OGG_DIRAC_GRANULE_LOW_MASK ((1<<22) - 1) static gboolean is_keyframe_dirac (GstOggStream * pad, gint64 granulepos) { gint64 pt; int dist_h; int dist_l; int dist; int delay; gint64 dt; if (granulepos == -1) return -1; pt = ((granulepos >> 22) + (granulepos & OGG_DIRAC_GRANULE_LOW_MASK)) >> 9; dist_h = (granulepos >> 22) & 0xff; dist_l = granulepos & 0xff; dist = (dist_h << 8) | dist_l; delay = (granulepos >> 9) & 0x1fff; dt = pt - delay; return (dist == 0); } static gint64 granulepos_to_granule_dirac (GstOggStream * pad, gint64 gp) { gint64 pt; int dist_h; int dist_l; int dist; int delay; gint64 dt; pt = ((gp >> 22) + (gp & OGG_DIRAC_GRANULE_LOW_MASK)) >> 9; dist_h = (gp >> 22) & 0xff; dist_l = gp & 0xff; dist = (dist_h << 8) | dist_l; delay = (gp >> 9) & 0x1fff; dt = pt - delay; GST_DEBUG ("pt %" G_GINT64_FORMAT " delay %d", pt, delay); return dt + 4; } static gint64 granule_to_granulepos_dirac (GstOggStream * pad, gint64 granule, gint64 keyframe_granule) { /* This conversion requires knowing more details about the Dirac * stream. */ return -1; } static gint64 granulepos_to_key_granule_dirac (GstOggStream * pad, gint64 gp) { gint64 pt; int dist_h; int dist_l; int dist; int delay; gint64 dt; if (gp == -1 || gp == 0) return gp; pt = ((gp >> 22) + (gp & OGG_DIRAC_GRANULE_LOW_MASK)) >> 9; dist_h = (gp >> 22) & 0xff; dist_l = gp & 0xff; dist = (dist_h << 8) | dist_l; delay = (gp >> 9) & 0x1fff; dt = pt - delay; return dt - 2 * dist + 4; } /* VP8 */ static gboolean setup_vp8_mapper (GstOggStream * pad, ogg_packet * packet) { gint width, height, par_n, par_d, fps_n, fps_d; if (packet->bytes < 26) { GST_DEBUG ("Failed to parse VP8 BOS page"); return FALSE; } width = GST_READ_UINT16_BE (packet->packet + 8); height = GST_READ_UINT16_BE (packet->packet + 10); par_n = GST_READ_UINT24_BE (packet->packet + 12); par_d = GST_READ_UINT24_BE (packet->packet + 15); fps_n = GST_READ_UINT32_BE (packet->packet + 18); fps_d = GST_READ_UINT32_BE (packet->packet + 22); pad->is_vp8 = TRUE; pad->granulerate_n = fps_n; pad->granulerate_d = fps_d; pad->n_header_packets = 2; pad->frame_size = 1; pad->caps = gst_caps_new_simple ("video/x-vp8", "width", G_TYPE_INT, width, "height", G_TYPE_INT, height, "pixel-aspect-ratio", GST_TYPE_FRACTION, par_n, par_d, "framerate", GST_TYPE_FRACTION, fps_n, fps_d, NULL); return TRUE; } static gboolean is_keyframe_vp8 (GstOggStream * pad, gint64 granulepos) { guint64 gpos = granulepos; if (granulepos == -1) return FALSE; /* Get rid of flags */ gpos >>= 3; return ((gpos & 0x07ffffff) == 0); } static gint64 granulepos_to_granule_vp8 (GstOggStream * pad, gint64 gpos) { guint64 gp = (guint64) gpos; guint32 pt; guint32 dist; pt = (gp >> 32); dist = (gp >> 3) & 0x07ffffff; GST_DEBUG ("pt %u, dist %u", pt, dist); return pt; } static gint64 granule_to_granulepos_vp8 (GstOggStream * pad, gint64 granule, gint64 keyframe_granule) { /* FIXME: This requires to look into the content of the packets * because the simple granule counter doesn't know about invisible * frames... */ return -1; } /* Check if this packet contains an invisible frame or not */ static gint64 packet_duration_vp8 (GstOggStream * pad, ogg_packet * packet) { guint32 hdr; if (packet->bytes < 3) return 0; hdr = GST_READ_UINT24_LE (packet->packet); return (((hdr >> 4) & 1) != 0) ? 1 : 0; } static gint64 granulepos_to_key_granule_vp8 (GstOggStream * pad, gint64 granulepos) { guint64 gp = granulepos; guint64 pts = (gp >> 32); guint32 dist = (gp >> 3) & 0x07ffffff; if (granulepos == -1 || granulepos == 0) return granulepos; if (dist > pts) return 0; return pts - dist; } static gboolean is_header_vp8 (GstOggStream * pad, ogg_packet * packet) { if (packet->bytes >= 5 && packet->packet[0] == 0x4F && packet->packet[1] == 0x56 && packet->packet[2] == 0x50 && packet->packet[3] == 0x38 && packet->packet[4] == 0x30) return TRUE; return FALSE; } /* vorbis */ static gboolean setup_vorbis_mapper (GstOggStream * pad, ogg_packet * packet) { guint8 *data = packet->packet; guint chans; data += 1 + 6 + 4; chans = GST_READ_UINT8 (data); data += 1; pad->granulerate_n = GST_READ_UINT32_LE (data); pad->granulerate_d = 1; pad->granuleshift = 0; pad->last_size = 0; GST_LOG ("sample rate: %d", pad->granulerate_n); data += 8; pad->bitrate = GST_READ_UINT32_LE (data); GST_LOG ("bit rate: %d", pad->bitrate); pad->n_header_packets = 3; if (pad->granulerate_n == 0) return FALSE; parse_vorbis_header_packet (pad, packet); pad->caps = gst_caps_new_simple ("audio/x-vorbis", "rate", G_TYPE_INT, pad->granulerate_n, "channels", G_TYPE_INT, chans, NULL); return TRUE; } static gboolean is_header_vorbis (GstOggStream * pad, ogg_packet * packet) { if (packet->bytes > 0 && (packet->packet[0] & 0x01) == 0) return FALSE; if (packet->packet[0] == 5) { parse_vorbis_setup_packet (pad, packet); } return TRUE; } static gint64 packet_duration_vorbis (GstOggStream * pad, ogg_packet * packet) { int mode; int size; int duration; if (packet->packet[0] & 1) return 0; mode = (packet->packet[0] >> 1) & ((1 << pad->vorbis_log2_num_modes) - 1); size = pad->vorbis_mode_sizes[mode] ? pad->long_size : pad->short_size; if (pad->last_size == 0) { duration = 0; } else { duration = pad->last_size / 4 + size / 4; } pad->last_size = size; GST_DEBUG ("duration %d", (int) duration); return duration; } /* speex */ static gboolean setup_speex_mapper (GstOggStream * pad, ogg_packet * packet) { guint8 *data = packet->packet; guint chans; data += 8 + 20 + 4 + 4; pad->granulerate_n = GST_READ_UINT32_LE (data); pad->granulerate_d = 1; pad->granuleshift = 0; data += 4 + 4 + 4; chans = GST_READ_UINT32_LE (data); data += 4; pad->bitrate = GST_READ_UINT32_LE (data); GST_LOG ("sample rate: %d, channels: %u", pad->granulerate_n, chans); GST_LOG ("bit rate: %d", pad->bitrate); pad->n_header_packets = GST_READ_UINT32_LE (packet->packet + 68) + 2; pad->frame_size = GST_READ_UINT32_LE (packet->packet + 64) * GST_READ_UINT32_LE (packet->packet + 56); if (pad->granulerate_n == 0) return FALSE; pad->caps = gst_caps_new_simple ("audio/x-speex", "rate", G_TYPE_INT, pad->granulerate_n, "channels", G_TYPE_INT, chans, NULL); return TRUE; } /* flac */ static gboolean setup_fLaC_mapper (GstOggStream * pad, ogg_packet * packet) { pad->granulerate_n = 0; pad->granulerate_d = 1; pad->granuleshift = 0; pad->n_header_packets = 3; pad->caps = gst_caps_new_simple ("audio/x-flac", NULL); return TRUE; } static gboolean is_header_fLaC (GstOggStream * pad, ogg_packet * packet) { if (pad->n_header_packets_seen == 1) { pad->granulerate_n = (packet->packet[14] << 12) | (packet->packet[15] << 4) | ((packet->packet[16] >> 4) & 0xf); } if (pad->n_header_packets_seen < pad->n_header_packets) { return TRUE; } return FALSE; } static gboolean setup_flac_mapper (GstOggStream * pad, ogg_packet * packet) { guint8 *data = packet->packet; guint chans; /* see http://flac.sourceforge.net/ogg_mapping.html */ pad->granulerate_n = (GST_READ_UINT32_BE (data + 27) & 0xFFFFF000) >> 12; pad->granulerate_d = 1; pad->granuleshift = 0; chans = ((GST_READ_UINT32_BE (data + 27) & 0x00000E00) >> 9) + 1; GST_DEBUG ("sample rate: %d, channels: %u", pad->granulerate_n, chans); pad->n_header_packets = GST_READ_UINT16_BE (packet->packet + 7); if (pad->granulerate_n == 0) return FALSE; pad->caps = gst_caps_new_simple ("audio/x-flac", "rate", G_TYPE_INT, pad->granulerate_n, "channels", G_TYPE_INT, chans, NULL); return TRUE; } static gboolean is_header_flac (GstOggStream * pad, ogg_packet * packet) { return (packet->bytes > 0 && (packet->packet[0] != 0xff)); } static gint64 packet_duration_flac (GstOggStream * pad, ogg_packet * packet) { int block_size_index; if (packet->bytes < 4) return -1; block_size_index = packet->packet[2] >> 4; if (block_size_index == 1) return 192; if (block_size_index >= 2 && block_size_index <= 5) { return 576 << (block_size_index - 2); } if (block_size_index >= 8) { return 256 << (block_size_index - 8); } if (block_size_index == 6 || block_size_index == 7) { guint len, bytes = (block_size_index - 6) + 1; guint8 tmp; if (packet->bytes < 4 + 1 + bytes) return -1; tmp = packet->packet[4]; /* utf-8 prefix */ len = 0; while (tmp & 0x80) { len++; tmp <<= 1; } if (len == 2) return -1; if (len == 0) len++; if (packet->bytes < 4 + len + bytes) return -1; if (bytes == 1) { return packet->packet[4 + len] + 1; } else { return GST_READ_UINT16_BE (packet->packet + 4 + len) + 1; } } return -1; } /* fishead */ static gboolean setup_fishead_mapper (GstOggStream * pad, ogg_packet * packet) { guint8 *data; gint64 prestime_n, prestime_d; gint64 basetime_n, basetime_d; data = packet->packet; data += 8; /* header */ pad->skeleton_major = GST_READ_UINT16_LE (data); data += 2; pad->skeleton_minor = GST_READ_UINT16_LE (data); data += 2; prestime_n = (gint64) GST_READ_UINT64_LE (data); data += 8; prestime_d = (gint64) GST_READ_UINT64_LE (data); data += 8; basetime_n = (gint64) GST_READ_UINT64_LE (data); data += 8; basetime_d = (gint64) GST_READ_UINT64_LE (data); data += 8; /* FIXME: we don't use basetime anywhere in the demuxer! */ if (basetime_d != 0) pad->basetime = gst_util_uint64_scale (GST_SECOND, basetime_n, basetime_d); else pad->basetime = -1; if (prestime_d != 0) pad->prestime = gst_util_uint64_scale (GST_SECOND, prestime_n, prestime_d); else pad->prestime = -1; /* Ogg Skeleton 3.3+ streams provide additional information in the header */ if (packet->bytes >= SKELETON_FISHEAD_3_3_MIN_SIZE && pad->skeleton_major == 3 && pad->skeleton_minor > 0) { gint64 firstsampletime_n, firstsampletime_d; gint64 lastsampletime_n, lastsampletime_d; gint64 firstsampletime, lastsampletime; guint64 segment_length, content_offset; firstsampletime_n = GST_READ_UINT64_LE (data + 64); firstsampletime_d = GST_READ_UINT64_LE (data + 72); lastsampletime_n = GST_READ_UINT64_LE (data + 80); lastsampletime_d = GST_READ_UINT64_LE (data + 88); segment_length = GST_READ_UINT64_LE (data + 96); content_offset = GST_READ_UINT64_LE (data + 104); GST_INFO ("firstsampletime %" G_GUINT64_FORMAT "/%" G_GUINT64_FORMAT, firstsampletime_n, firstsampletime_d); GST_INFO ("lastsampletime %" G_GUINT64_FORMAT "/%" G_GUINT64_FORMAT, lastsampletime_n, lastsampletime_d); GST_INFO ("segment length %" G_GUINT64_FORMAT, segment_length); GST_INFO ("content offset %" G_GUINT64_FORMAT, content_offset); if (firstsampletime_d > 0) firstsampletime = gst_util_uint64_scale (GST_SECOND, firstsampletime_n, firstsampletime_d); else firstsampletime = 0; if (lastsampletime_d > 0) lastsampletime = gst_util_uint64_scale (GST_SECOND, lastsampletime_n, lastsampletime_d); else lastsampletime = 0; if (lastsampletime > firstsampletime) pad->total_time = lastsampletime - firstsampletime; else pad->total_time = -1; GST_INFO ("skeleton fishead parsed total: %" GST_TIME_FORMAT, GST_TIME_ARGS (pad->total_time)); } else if (packet->bytes >= SKELETON_FISHEAD_4_0_MIN_SIZE && pad->skeleton_major == 4) { guint64 segment_length, content_offset; segment_length = GST_READ_UINT64_LE (data + 64); content_offset = GST_READ_UINT64_LE (data + 72); GST_INFO ("segment length %" G_GUINT64_FORMAT, segment_length); GST_INFO ("content offset %" G_GUINT64_FORMAT, content_offset); } else { pad->total_time = -1; } GST_INFO ("skeleton fishead %u.%u parsed (basetime: %" GST_TIME_FORMAT ", prestime: %" GST_TIME_FORMAT ")", pad->skeleton_major, pad->skeleton_minor, GST_TIME_ARGS (pad->basetime), GST_TIME_ARGS (pad->prestime)); pad->is_skeleton = TRUE; return TRUE; } gboolean gst_ogg_map_parse_fisbone (GstOggStream * pad, const guint8 * data, guint size, guint32 * serialno, GstOggSkeleton * type) { GstOggSkeleton stype; guint serial_offset; if (size < SKELETON_FISBONE_MIN_SIZE) { GST_WARNING ("small fisbone packet of size %d, ignoring", size); return FALSE; } if (memcmp (data, "fisbone\0", 8) == 0) { GST_INFO ("got fisbone packet"); stype = GST_OGG_SKELETON_FISBONE; serial_offset = 12; } else if (memcmp (data, "index\0", 6) == 0) { GST_INFO ("got index packet"); stype = GST_OGG_SKELETON_INDEX; serial_offset = 6; } else { GST_WARNING ("unknown skeleton packet %10.10s", data); return FALSE; } if (serialno) *serialno = GST_READ_UINT32_LE (data + serial_offset); if (type) *type = stype; return TRUE; } gboolean gst_ogg_map_add_fisbone (GstOggStream * pad, GstOggStream * skel_pad, const guint8 * data, guint size, GstClockTime * p_start_time) { GstClockTime start_time; gint64 start_granule; if (pad->have_fisbone) { GST_DEBUG ("already have fisbone, ignoring second one"); return FALSE; } /* skip "fisbone\0" + headers offset + serialno + num headers */ data += 8 + 4 + 4 + 4; pad->have_fisbone = TRUE; /* we just overwrite whatever was set before by the format-specific setup */ pad->granulerate_n = GST_READ_UINT64_LE (data); pad->granulerate_d = GST_READ_UINT64_LE (data + 8); start_granule = GST_READ_UINT64_LE (data + 16); pad->preroll = GST_READ_UINT32_LE (data + 24); pad->granuleshift = GST_READ_UINT8 (data + 28); start_time = granulepos_to_granule_default (pad, start_granule); GST_INFO ("skeleton fisbone parsed " "(start time: %" GST_TIME_FORMAT " granulerate_n: %d granulerate_d: %d " " preroll: %" G_GUINT32_FORMAT " granuleshift: %d)", GST_TIME_ARGS (start_time), pad->granulerate_n, pad->granulerate_d, pad->preroll, pad->granuleshift); if (p_start_time) *p_start_time = start_time; return TRUE; } static gboolean read_vlc (const guint8 ** data, guint * size, guint64 * result) { gint shift = 0; guint8 byte; *result = 0; do { if (G_UNLIKELY (*size < 1)) return FALSE; byte = **data; *result |= ((byte & 0x7f) << shift); shift += 7; (*data)++; (*size)--; } while ((byte & 0x80) != 0x80); return TRUE; } gboolean gst_ogg_map_add_index (GstOggStream * pad, GstOggStream * skel_pad, const guint8 * data, guint size) { guint64 i, n_keypoints, isize; guint64 offset, timestamp; guint64 offset_d, timestamp_d; if (pad->index) { GST_DEBUG ("already have index, ignoring second one"); return TRUE; } if ((skel_pad->skeleton_major == 3 && size < 26) || (skel_pad->skeleton_major == 4 && size < 62)) { GST_WARNING ("small index packet of size %u, ignoring", size); return FALSE; } /* skip "index\0" + serialno */ data += 6 + 4; size -= 6 + 4; n_keypoints = GST_READ_UINT64_LE (data); data += 8; size -= 8; pad->kp_denom = GST_READ_UINT64_LE (data); if (pad->kp_denom == 0) pad->kp_denom = 1; data += 8; size -= 8; if (skel_pad->skeleton_major == 4) { gint64 firstsampletime_n; gint64 lastsampletime_n; gint64 firstsampletime, lastsampletime; firstsampletime_n = GST_READ_UINT64_LE (data + 0); lastsampletime_n = GST_READ_UINT64_LE (data + 8); GST_INFO ("firstsampletime %" G_GUINT64_FORMAT "/%" G_GUINT64_FORMAT, firstsampletime_n, pad->kp_denom); GST_INFO ("lastsampletime %" G_GUINT64_FORMAT "/%" G_GUINT64_FORMAT, lastsampletime_n, pad->kp_denom); firstsampletime = gst_util_uint64_scale (GST_SECOND, firstsampletime_n, pad->kp_denom); lastsampletime = gst_util_uint64_scale (GST_SECOND, lastsampletime_n, pad->kp_denom); if (lastsampletime > firstsampletime) pad->total_time = lastsampletime - firstsampletime; else pad->total_time = -1; GST_INFO ("skeleton index parsed total: %" GST_TIME_FORMAT, GST_TIME_ARGS (pad->total_time)); data += 16; size -= 16; } GST_INFO ("skeleton index has %" G_GUINT64_FORMAT " keypoints, denom: %" G_GINT64_FORMAT, n_keypoints, pad->kp_denom); pad->index = g_try_new (GstOggIndex, n_keypoints); if (!pad->index) return FALSE; isize = 0; offset = 0; timestamp = 0; for (i = 0; i < n_keypoints; i++) { /* read deltas */ if (!read_vlc (&data, &size, &offset_d)) break; if (!read_vlc (&data, &size, ×tamp_d)) break; offset += offset_d; timestamp += timestamp_d; pad->index[i].offset = offset; pad->index[i].timestamp = timestamp; isize++; GST_INFO ("offset %" G_GUINT64_FORMAT " time %" G_GUINT64_FORMAT, offset, timestamp); } if (isize != n_keypoints) { GST_WARNING ("truncated index, expected %" G_GUINT64_FORMAT ", found %" G_GUINT64_FORMAT, n_keypoints, isize); } pad->n_index = isize; /* try to use the index to estimate the bitrate */ if (isize > 2) { guint64 so, eo, st, et, b, t; /* get start and end offset and timestamps */ so = pad->index[0].offset; st = pad->index[0].timestamp; eo = pad->index[isize - 1].offset; et = pad->index[isize - 1].timestamp; b = eo - so; t = et - st; GST_DEBUG ("bytes/time %" G_GUINT64_FORMAT "/%" G_GUINT64_FORMAT, b, t); /* this is the total stream bitrate according to this index */ pad->idx_bitrate = gst_util_uint64_scale (8 * b, pad->kp_denom, t); GST_DEBUG ("bitrate %" G_GUINT64_FORMAT, pad->idx_bitrate); } return TRUE; } static gint gst_ogg_index_compare (const GstOggIndex * index, const guint64 * ts, gpointer user_data) { if (index->timestamp < *ts) return -1; else if (index->timestamp > *ts) return 1; else return 0; } gboolean gst_ogg_map_search_index (GstOggStream * pad, gboolean before, guint64 * timestamp, guint64 * offset) { guint64 n_index; guint64 ts; GstOggIndex *best; n_index = pad->n_index; if (n_index == 0 || pad->index == NULL) return FALSE; ts = gst_util_uint64_scale (*timestamp, pad->kp_denom, GST_SECOND); GST_INFO ("timestamp %" G_GUINT64_FORMAT, ts); best = gst_util_array_binary_search (pad->index, n_index, sizeof (GstOggIndex), (GCompareDataFunc) gst_ogg_index_compare, GST_SEARCH_MODE_BEFORE, &ts, NULL); if (best == NULL) return FALSE; GST_INFO ("found at index %u", (guint) (best - pad->index)); if (offset) *offset = best->offset; if (timestamp) *timestamp = gst_util_uint64_scale (best->timestamp, GST_SECOND, pad->kp_denom); return TRUE; } /* Do we need these for something? * ogm->hdr.size = GST_READ_UINT32_LE (&data[13]); * ogm->hdr.time_unit = GST_READ_UINT64_LE (&data[17]); * ogm->hdr.samples_per_unit = GST_READ_UINT64_LE (&data[25]); * ogm->hdr.default_len = GST_READ_UINT32_LE (&data[33]); * ogm->hdr.buffersize = GST_READ_UINT32_LE (&data[37]); * ogm->hdr.bits_per_sample = GST_READ_UINT32_LE (&data[41]); */ static gboolean is_header_ogm (GstOggStream * pad, ogg_packet * packet) { if (packet->bytes >= 1 && (packet->packet[0] & 0x01)) return TRUE; return FALSE; } static gint64 packet_duration_ogm (GstOggStream * pad, ogg_packet * packet) { const guint8 *data; int samples; int offset; int n; data = packet->packet; offset = 1 + (((data[0] & 0xc0) >> 6) | ((data[0] & 0x02) << 1)); if (offset > packet->bytes) { GST_ERROR ("buffer too small"); return -1; } samples = 0; for (n = offset - 1; n > 0; n--) { samples = (samples << 8) | data[n]; } return samples; } static gboolean setup_ogmaudio_mapper (GstOggStream * pad, ogg_packet * packet) { guint8 *data = packet->packet; guint32 fourcc; pad->granulerate_n = GST_READ_UINT64_LE (data + 25); pad->granulerate_d = 1; fourcc = GST_READ_UINT32_LE (data + 9); GST_DEBUG ("fourcc: %" GST_FOURCC_FORMAT, GST_FOURCC_ARGS (fourcc)); pad->caps = gst_riff_create_audio_caps (fourcc, NULL, NULL, NULL, NULL, NULL); GST_LOG ("sample rate: %d", pad->granulerate_n); if (pad->granulerate_n == 0) return FALSE; if (pad->caps) { gst_caps_set_simple (pad->caps, "rate", G_TYPE_INT, pad->granulerate_n, NULL); } else { pad->caps = gst_caps_new_simple ("audio/x-ogm-unknown", "fourcc", GST_TYPE_FOURCC, fourcc, "rate", G_TYPE_INT, pad->granulerate_n, NULL); } pad->n_header_packets = 1; pad->is_ogm = TRUE; return TRUE; } static gboolean setup_ogmvideo_mapper (GstOggStream * pad, ogg_packet * packet) { guint8 *data = packet->packet; guint32 fourcc; int width, height; gint64 time_unit; GST_DEBUG ("time unit %d", GST_READ_UINT32_LE (data + 16)); GST_DEBUG ("samples per unit %d", GST_READ_UINT32_LE (data + 24)); pad->granulerate_n = 10000000; time_unit = GST_READ_UINT64_LE (data + 17); if (time_unit > G_MAXINT || time_unit < G_MININT) { GST_WARNING ("timeunit is out of range"); } pad->granulerate_d = (gint) CLAMP (time_unit, G_MININT, G_MAXINT); GST_LOG ("fps = %d/%d = %.3f", pad->granulerate_n, pad->granulerate_d, (double) pad->granulerate_n / pad->granulerate_d); fourcc = GST_READ_UINT32_LE (data + 9); width = GST_READ_UINT32_LE (data + 45); height = GST_READ_UINT32_LE (data + 49); GST_DEBUG ("fourcc: %" GST_FOURCC_FORMAT, GST_FOURCC_ARGS (fourcc)); pad->caps = gst_riff_create_video_caps (fourcc, NULL, NULL, NULL, NULL, NULL); if (pad->caps == NULL) { pad->caps = gst_caps_new_simple ("video/x-ogm-unknown", "fourcc", GST_TYPE_FOURCC, fourcc, "framerate", GST_TYPE_FRACTION, pad->granulerate_n, pad->granulerate_d, NULL); } else { gst_caps_set_simple (pad->caps, "framerate", GST_TYPE_FRACTION, pad->granulerate_n, pad->granulerate_d, "width", G_TYPE_INT, width, "height", G_TYPE_INT, height, NULL); } GST_DEBUG ("caps: %" GST_PTR_FORMAT, pad->caps); pad->n_header_packets = 1; pad->frame_size = 1; pad->is_ogm = TRUE; return TRUE; } static gboolean setup_ogmtext_mapper (GstOggStream * pad, ogg_packet * packet) { guint8 *data = packet->packet; gint64 time_unit; pad->granulerate_n = 10000000; time_unit = GST_READ_UINT64_LE (data + 17); if (time_unit > G_MAXINT || time_unit < G_MININT) { GST_WARNING ("timeunit is out of range"); } pad->granulerate_d = (gint) CLAMP (time_unit, G_MININT, G_MAXINT); GST_LOG ("fps = %d/%d = %.3f", pad->granulerate_n, pad->granulerate_d, (double) pad->granulerate_n / pad->granulerate_d); if (pad->granulerate_d <= 0) return FALSE; pad->caps = gst_caps_new_simple ("text/plain", NULL); pad->n_header_packets = 1; pad->is_ogm = TRUE; pad->is_ogm_text = TRUE; return TRUE; } /* PCM */ #define OGGPCM_FMT_S8 0x00000000 /* Signed integer 8 bit */ #define OGGPCM_FMT_U8 0x00000001 /* Unsigned integer 8 bit */ #define OGGPCM_FMT_S16_LE 0x00000002 /* Signed integer 16 bit little endian */ #define OGGPCM_FMT_S16_BE 0x00000003 /* Signed integer 16 bit big endian */ #define OGGPCM_FMT_S24_LE 0x00000004 /* Signed integer 24 bit little endian */ #define OGGPCM_FMT_S24_BE 0x00000005 /* Signed integer 24 bit big endian */ #define OGGPCM_FMT_S32_LE 0x00000006 /* Signed integer 32 bit little endian */ #define OGGPCM_FMT_S32_BE 0x00000007 /* Signed integer 32 bit big endian */ #define OGGPCM_FMT_ULAW 0x00000010 /* G.711 u-law encoding (8 bit) */ #define OGGPCM_FMT_ALAW 0x00000011 /* G.711 A-law encoding (8 bit) */ #define OGGPCM_FMT_FLT32_LE 0x00000020 /* IEEE Float [-1,1] 32 bit little endian */ #define OGGPCM_FMT_FLT32_BE 0x00000021 /* IEEE Float [-1,1] 32 bit big endian */ #define OGGPCM_FMT_FLT64_LE 0x00000022 /* IEEE Float [-1,1] 64 bit little endian */ #define OGGPCM_FMT_FLT64_BE 0x00000023 /* IEEE Float [-1,1] 64 bit big endian */ static gboolean setup_pcm_mapper (GstOggStream * pad, ogg_packet * packet) { guint8 *data = packet->packet; int format; int channels; GstCaps *caps; pad->granulerate_n = GST_READ_UINT32_LE (data + 16); pad->granulerate_d = 1; GST_LOG ("sample rate: %d", pad->granulerate_n); format = GST_READ_UINT32_LE (data + 12); channels = GST_READ_UINT8 (data + 21); pad->n_header_packets = 2 + GST_READ_UINT32_LE (data + 24); if (pad->granulerate_n == 0) return FALSE; switch (format) { case OGGPCM_FMT_S8: caps = gst_caps_new_simple ("audio/x-raw-int", "depth", G_TYPE_INT, 8, "width", G_TYPE_INT, 8, "signed", G_TYPE_BOOLEAN, TRUE, NULL); break; case OGGPCM_FMT_U8: caps = gst_caps_new_simple ("audio/x-raw-int", "depth", G_TYPE_INT, 8, "width", G_TYPE_INT, 8, "signed", G_TYPE_BOOLEAN, FALSE, NULL); break; case OGGPCM_FMT_S16_LE: caps = gst_caps_new_simple ("audio/x-raw-int", "depth", G_TYPE_INT, 16, "width", G_TYPE_INT, 16, "endianness", G_TYPE_INT, G_LITTLE_ENDIAN, "signed", G_TYPE_BOOLEAN, TRUE, NULL); break; case OGGPCM_FMT_S16_BE: caps = gst_caps_new_simple ("audio/x-raw-int", "depth", G_TYPE_INT, 16, "width", G_TYPE_INT, 16, "endianness", G_TYPE_INT, G_BIG_ENDIAN, "signed", G_TYPE_BOOLEAN, TRUE, NULL); break; case OGGPCM_FMT_S24_LE: caps = gst_caps_new_simple ("audio/x-raw-int", "depth", G_TYPE_INT, 24, "width", G_TYPE_INT, 24, "endianness", G_TYPE_INT, G_LITTLE_ENDIAN, "signed", G_TYPE_BOOLEAN, TRUE, NULL); break; case OGGPCM_FMT_S24_BE: caps = gst_caps_new_simple ("audio/x-raw-int", "depth", G_TYPE_INT, 24, "width", G_TYPE_INT, 24, "endianness", G_TYPE_INT, G_BIG_ENDIAN, "signed", G_TYPE_BOOLEAN, TRUE, NULL); break; case OGGPCM_FMT_S32_LE: caps = gst_caps_new_simple ("audio/x-raw-int", "depth", G_TYPE_INT, 32, "width", G_TYPE_INT, 32, "endianness", G_TYPE_INT, G_LITTLE_ENDIAN, "signed", G_TYPE_BOOLEAN, TRUE, NULL); break; case OGGPCM_FMT_S32_BE: caps = gst_caps_new_simple ("audio/x-raw-int", "depth", G_TYPE_INT, 32, "width", G_TYPE_INT, 32, "endianness", G_TYPE_INT, G_BIG_ENDIAN, "signed", G_TYPE_BOOLEAN, TRUE, NULL); break; case OGGPCM_FMT_ULAW: caps = gst_caps_new_simple ("audio/x-mulaw", NULL); break; case OGGPCM_FMT_ALAW: caps = gst_caps_new_simple ("audio/x-alaw", NULL); break; case OGGPCM_FMT_FLT32_LE: caps = gst_caps_new_simple ("audio/x-raw-float", "width", G_TYPE_INT, 32, "endianness", G_TYPE_INT, G_LITTLE_ENDIAN, NULL); break; case OGGPCM_FMT_FLT32_BE: caps = gst_caps_new_simple ("audio/x-raw-float", "width", G_TYPE_INT, 32, "endianness", G_TYPE_INT, G_BIG_ENDIAN, NULL); break; case OGGPCM_FMT_FLT64_LE: caps = gst_caps_new_simple ("audio/x-raw-float", "width", G_TYPE_INT, 64, "endianness", G_TYPE_INT, G_LITTLE_ENDIAN, NULL); break; case OGGPCM_FMT_FLT64_BE: caps = gst_caps_new_simple ("audio/x-raw-float", "width", G_TYPE_INT, 64, "endianness", G_TYPE_INT, G_BIG_ENDIAN, NULL); break; default: return FALSE; } gst_caps_set_simple (caps, "audio/x-raw-int", "rate", G_TYPE_INT, pad->granulerate_n, "channels", G_TYPE_INT, channels, NULL); pad->caps = caps; return TRUE; } /* cmml */ static gboolean setup_cmml_mapper (GstOggStream * pad, ogg_packet * packet) { guint8 *data = packet->packet; pad->granulerate_n = GST_READ_UINT64_LE (data + 12); pad->granulerate_d = GST_READ_UINT64_LE (data + 20); pad->granuleshift = data[28]; GST_LOG ("sample rate: %d", pad->granulerate_n); pad->n_header_packets = 3; if (pad->granulerate_n == 0) return FALSE; data += 4 + (4 + 4 + 4); GST_DEBUG ("blocksize0: %u", 1 << (data[0] >> 4)); GST_DEBUG ("blocksize1: %u", 1 << (data[0] & 0x0F)); pad->caps = gst_caps_new_simple ("text/x-cmml", NULL); return TRUE; } /* celt */ static gboolean setup_celt_mapper (GstOggStream * pad, ogg_packet * packet) { guint8 *data = packet->packet; pad->granulerate_n = GST_READ_UINT32_LE (data + 36); pad->granulerate_d = 1; pad->granuleshift = 0; GST_LOG ("sample rate: %d", pad->granulerate_n); pad->frame_size = GST_READ_UINT32_LE (packet->packet + 44); pad->n_header_packets = GST_READ_UINT32_LE (packet->packet + 56) + 2; if (pad->granulerate_n == 0) return FALSE; pad->caps = gst_caps_new_simple ("audio/x-celt", "rate", G_TYPE_INT, pad->granulerate_n, NULL); return TRUE; } /* kate */ static gboolean setup_kate_mapper (GstOggStream * pad, ogg_packet * packet) { guint8 *data = packet->packet; const char *category; if (packet->bytes < 64) return FALSE; pad->granulerate_n = GST_READ_UINT32_LE (data + 24); pad->granulerate_d = GST_READ_UINT32_LE (data + 28); pad->granuleshift = GST_READ_UINT8 (data + 15); GST_LOG ("sample rate: %d", pad->granulerate_n); pad->n_header_packets = GST_READ_UINT8 (data + 11); if (pad->granulerate_n == 0) return FALSE; category = (const char *) data + 48; if (strcmp (category, "subtitles") == 0 || strcmp (category, "SUB") == 0 || strcmp (category, "spu-subtitles") == 0 || strcmp (category, "K-SPU") == 0) { pad->caps = gst_caps_new_simple ("subtitle/x-kate", NULL); } else { pad->caps = gst_caps_new_simple ("application/x-kate", NULL); } return TRUE; } /* *INDENT-OFF* */ /* indent hates our freedoms */ const GstOggMap mappers[] = { { "\200theora", 7, 42, "video/x-theora", setup_theora_mapper, granulepos_to_granule_theora, granule_to_granulepos_default, is_keyframe_theora, is_header_theora, packet_duration_constant, NULL }, { "\001vorbis", 7, 22, "audio/x-vorbis", setup_vorbis_mapper, granulepos_to_granule_default, granule_to_granulepos_default, is_keyframe_true, is_header_vorbis, packet_duration_vorbis, NULL }, { "Speex", 5, 80, "audio/x-speex", setup_speex_mapper, granulepos_to_granule_default, granule_to_granulepos_default, is_keyframe_true, is_header_count, packet_duration_constant, NULL }, { "PCM ", 8, 0, "audio/x-raw-int", setup_pcm_mapper, NULL, NULL, NULL, is_header_count, NULL, NULL }, { "CMML\0\0\0\0", 8, 0, "text/x-cmml", setup_cmml_mapper, NULL, NULL, NULL, is_header_count, NULL, NULL }, { "Annodex", 7, 0, "application/x-annodex", setup_fishead_mapper, granulepos_to_granule_default, granule_to_granulepos_default, NULL, is_header_count, NULL, NULL }, { "fishead", 7, 64, "application/octet-stream", setup_fishead_mapper, NULL, NULL, NULL, is_header_true, NULL, NULL }, { "fLaC", 4, 0, "audio/x-flac", setup_fLaC_mapper, granulepos_to_granule_default, granule_to_granulepos_default, is_keyframe_true, is_header_fLaC, packet_duration_flac, NULL }, { "\177FLAC", 5, 36, "audio/x-flac", setup_flac_mapper, granulepos_to_granule_default, granule_to_granulepos_default, is_keyframe_true, is_header_flac, packet_duration_flac, NULL }, { "AnxData", 7, 0, "application/octet-stream", NULL, NULL, NULL, NULL, NULL, NULL }, { "CELT ", 8, 0, "audio/x-celt", setup_celt_mapper, granulepos_to_granule_default, granule_to_granulepos_default, NULL, is_header_count, packet_duration_constant, NULL }, { "\200kate\0\0\0", 8, 0, "text/x-kate", setup_kate_mapper, granulepos_to_granule_default, granule_to_granulepos_default, NULL, is_header_count, NULL, NULL }, { "BBCD\0", 5, 13, "video/x-dirac", setup_dirac_mapper, granulepos_to_granule_dirac, granule_to_granulepos_dirac, is_keyframe_dirac, is_header_count, packet_duration_constant, granulepos_to_key_granule_dirac }, { "OVP80\1\1", 7, 4, "video/x-vp8", setup_vp8_mapper, granulepos_to_granule_vp8, granule_to_granulepos_vp8, is_keyframe_vp8, is_header_vp8, packet_duration_vp8, granulepos_to_key_granule_vp8 }, { "\001audio\0\0\0", 9, 53, "application/x-ogm-audio", setup_ogmaudio_mapper, granulepos_to_granule_default, granule_to_granulepos_default, is_keyframe_true, is_header_ogm, packet_duration_ogm, NULL }, { "\001video\0\0\0", 9, 53, "application/x-ogm-video", setup_ogmvideo_mapper, granulepos_to_granule_default, granule_to_granulepos_default, NULL, is_header_ogm, packet_duration_constant, NULL }, { "\001text\0\0\0", 9, 9, "application/x-ogm-text", setup_ogmtext_mapper, granulepos_to_granule_default, granule_to_granulepos_default, is_keyframe_true, is_header_ogm, packet_duration_ogm, NULL } }; /* *INDENT-ON* */ gboolean gst_ogg_stream_setup_map (GstOggStream * pad, ogg_packet * packet) { int i; gboolean ret; for (i = 0; i < G_N_ELEMENTS (mappers); i++) { if (packet->bytes >= mappers[i].min_packet_size && packet->bytes >= mappers[i].id_length && memcmp (packet->packet, mappers[i].id, mappers[i].id_length) == 0) { GST_DEBUG ("found mapper for '%s'", mappers[i].id); if (mappers[i].setup_func) ret = mappers[i].setup_func (pad, packet); else continue; if (ret) { GST_DEBUG ("got stream type %" GST_PTR_FORMAT, pad->caps); pad->map = i; return TRUE; } else { GST_WARNING ("mapper '%s' did not accept setup header", mappers[i].media_type); } } } return FALSE; }