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gstreamer/ext/ogg/gstoggstream.c

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/* GStreamer Ogg Granulepos Mapping Utility Functions
* Copyright (C) 2006 Tim-Philipp Müller <tim centricular net>
* Copyright (C) 2009 David Schleef <ds@schleef.org>
*
* 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 <gst/riff/riff-media.h>
#include <stdlib.h>
#include <string.h>
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
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;
};
static 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;
}
/* 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 < 24) {
GST_DEBUG ("Failed to parse VP8 BOS page");
return FALSE;
}
width = GST_READ_UINT16_BE (packet->packet + 6);
height = GST_READ_UINT16_BE (packet->packet + 8);
par_n = GST_READ_UINT24_BE (packet->packet + 10);
par_d = GST_READ_UINT24_BE (packet->packet + 13);
fps_n = GST_READ_UINT32_BE (packet->packet + 16);
fps_d = GST_READ_UINT32_BE (packet->packet + 20);
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;
}
/* 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 + 2 + 2; /* header + major/minor version */
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) {
gint64 firstsampletime_n, firstsampletime_d;
gint64 lastsampletime_n, lastsampletime_d;
gint64 firstsampletime, lastsampletime;
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);
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);
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 {
pad->total_time = -1;
}
GST_INFO ("skeleton fishead parsed (basetime: %" GST_TIME_FORMAT
", prestime: %" GST_TIME_FORMAT ")", 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,
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;
gint64 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, 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 (size < 26) {
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);
pad->kp_denom = GST_READ_UINT64_LE (data + 8);
if (pad->kp_denom == 0)
pad->kp_denom = 1;
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, &timestamp_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;
}
gboolean
gst_ogg_map_search_index (GstOggStream * pad, gboolean before,
guint64 * timestamp, guint64 * offset)
{
guint64 n_index;
guint i, best;
guint64 ts;
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 = -1;
/* FIXME, do binary search */
for (i = 0; i < n_index; i++) {
if (pad->index[i].timestamp <= ts)
best = i;
else if (pad->index[i].timestamp > ts)
break;
}
if (best == -1)
return FALSE;
GST_INFO ("found at index %u", best);
if (offset)
*offset = pad->index[best].offset;
if (timestamp)
*timestamp =
gst_util_uint64_scale (pad->index[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 */
static 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,
NULL
},
{
"VP80\1", 5, 4,
"video/x-vp8",
setup_vp8_mapper,
granulepos_to_granule_vp8,
granule_to_granulepos_vp8,
is_keyframe_vp8,
is_header_count,
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;
}
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