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gstreamer/gst/mpegtsmux/tsmux/tsmuxstream.c
Tim-Philipp Müller c05a9424be mpegtsmux: add basic support for asynchronous KLV metadata streams 
This is defined in SMPTE Rp 217. In this case the
metadata PES packets carry no timestamps of their
own and no Metadata Access Unit Wrappers are used.
2015-07-13 23:34:31 +01:00

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27 KiB
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/*
* Copyright 2006 BBC and Fluendo S.A.
*
* This library is licensed under 4 different licenses and you
* can choose to use it under the terms of any one of them. The
* four licenses are the MPL 1.1, the LGPL, the GPL and the MIT
* license.
*
* MPL:
*
* The contents of this file are subject to the Mozilla Public License
* Version 1.1 (the "License"); you may not use this file except in
* compliance with the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/.
*
* Software distributed under the License is distributed on an "AS IS"
* basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
* License for the specific language governing rights and limitations
* under the License.
*
* LGPL:
*
* 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., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*
* GPL:
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.
*
* MIT:
*
* Unless otherwise indicated, Source Code is licensed under MIT license.
* See further explanation attached in License Statement (distributed in the file
* LICENSE).
*
* Permission is hereby granted, free of charge, to any person obtaining a copy of
* this software and associated documentation files (the "Software"), to deal in
* the Software without restriction, including without limitation the rights to
* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
* of the Software, and to permit persons to whom the Software is furnished to do
* so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <string.h>
#include <gst/mpegts/mpegts.h>
#include "tsmuxcommon.h"
#include "tsmuxstream.h"
#define GST_CAT_DEFAULT mpegtsmux_debug
static guint8 tsmux_stream_pes_header_length (TsMuxStream * stream);
static void tsmux_stream_write_pes_header (TsMuxStream * stream, guint8 * data);
static void tsmux_stream_find_pts_dts_within (TsMuxStream * stream, guint bound,
gint64 * pts, gint64 * dts);
struct TsMuxStreamBuffer
{
guint8 *data;
guint32 size;
/* PTS & DTS associated with the contents of this buffer */
gint64 pts;
gint64 dts;
/* data represents random access point */
gboolean random_access;
/* user_data for release function */
void *user_data;
};
/**
* tsmux_stream_new:
* @pid: a PID
* @stream_type: the stream type
*
* Create a new stream with PID of @pid and @stream_type.
*
* Returns: a new #TsMuxStream.
*/
TsMuxStream *
tsmux_stream_new (guint16 pid, TsMuxStreamType stream_type)
{
TsMuxStream *stream = g_slice_new0 (TsMuxStream);
stream->state = TSMUX_STREAM_STATE_HEADER;
stream->pi.pid = pid;
stream->stream_type = stream_type;
stream->pes_payload_size = 0;
stream->cur_pes_payload_size = 0;
stream->pes_bytes_written = 0;
switch (stream_type) {
case TSMUX_ST_VIDEO_MPEG1:
case TSMUX_ST_VIDEO_MPEG2:
case TSMUX_ST_VIDEO_MPEG4:
case TSMUX_ST_VIDEO_H264:
/* FIXME: Assign sequential IDs? */
stream->id = 0xE0;
stream->pi.flags |= TSMUX_PACKET_FLAG_PES_FULL_HEADER;
stream->is_video_stream = TRUE;
break;
case TSMUX_ST_AUDIO_AAC:
case TSMUX_ST_AUDIO_MPEG1:
case TSMUX_ST_AUDIO_MPEG2:
/* FIXME: Assign sequential IDs? */
stream->id = 0xC0;
stream->pi.flags |= TSMUX_PACKET_FLAG_PES_FULL_HEADER;
break;
case TSMUX_ST_VIDEO_DIRAC:
case TSMUX_ST_PS_AUDIO_LPCM:
case TSMUX_ST_PS_AUDIO_AC3:
case TSMUX_ST_PS_AUDIO_DTS:
stream->id = 0xFD;
/* FIXME: assign sequential extended IDs? */
switch (stream_type) {
case TSMUX_ST_VIDEO_DIRAC:
stream->id_extended = 0x60;
stream->is_video_stream = TRUE;
break;
case TSMUX_ST_PS_AUDIO_LPCM:
stream->id_extended = 0x80;
break;
case TSMUX_ST_PS_AUDIO_AC3:
stream->id_extended = 0x71;
break;
case TSMUX_ST_PS_AUDIO_DTS:
stream->id_extended = 0x82;
break;
default:
break;
}
stream->pi.flags |=
TSMUX_PACKET_FLAG_PES_FULL_HEADER |
TSMUX_PACKET_FLAG_PES_EXT_STREAMID;
break;
case TSMUX_ST_PS_TELETEXT:
/* needs fixes PES header length */
stream->pi.pes_header_length = 36;
/* fall through */
case TSMUX_ST_PS_DVB_SUBPICTURE:
/* private stream 1 */
stream->id = 0xBD;
stream->is_dvb_sub = TRUE;
stream->stream_type = TSMUX_ST_PRIVATE_DATA;
stream->pi.flags |=
TSMUX_PACKET_FLAG_PES_FULL_HEADER |
TSMUX_PACKET_FLAG_PES_DATA_ALIGNMENT;
break;
case TSMUX_ST_PS_KLV:
/* FIXME: assign sequential extended IDs? */
stream->id = 0xBD;
stream->stream_type = TSMUX_ST_PRIVATE_DATA;
stream->is_meta = TRUE;
stream->pi.flags |=
TSMUX_PACKET_FLAG_PES_FULL_HEADER |
TSMUX_PACKET_FLAG_PES_DATA_ALIGNMENT;
break;
default:
g_critical ("Stream type 0x%0x not yet implemented", stream_type);
break;
}
stream->last_pts = GST_CLOCK_STIME_NONE;
stream->last_dts = GST_CLOCK_STIME_NONE;
stream->pcr_ref = 0;
stream->last_pcr = -1;
return stream;
}
/**
* tsmux_stream_get_pid:
* @stream: a #TsMuxStream
*
* Get the PID of @stream.
*
* Returns: The PID of @stream. 0xffff on error.
*/
guint16
tsmux_stream_get_pid (TsMuxStream * stream)
{
g_return_val_if_fail (stream != NULL, G_MAXUINT16);
return stream->pi.pid;
}
/**
* tsmux_stream_free:
* @stream: a #TsMuxStream
*
* Free the resources of @stream.
*/
void
tsmux_stream_free (TsMuxStream * stream)
{
GList *cur;
g_return_if_fail (stream != NULL);
/* free buffers */
for (cur = stream->buffers; cur; cur = cur->next) {
TsMuxStreamBuffer *tmbuf = (TsMuxStreamBuffer *) cur->data;
if (stream->buffer_release)
stream->buffer_release (tmbuf->data, tmbuf->user_data);
g_slice_free (TsMuxStreamBuffer, tmbuf);
}
g_list_free (stream->buffers);
g_slice_free (TsMuxStream, stream);
}
/**
* tsmux_stream_set_buffer_release_func:
* @stream: a #TsMuxStream
* @func: the new #TsMuxStreamBufferReleaseFunc
*
* Set the function that will be called when a a piece of data fed to @stream
* with tsmux_stream_add_data() can be freed. @func will be called with user
* data as provided with the call to tsmux_stream_add_data().
*/
void
tsmux_stream_set_buffer_release_func (TsMuxStream * stream,
TsMuxStreamBufferReleaseFunc func)
{
g_return_if_fail (stream != NULL);
stream->buffer_release = func;
}
/* Advance the current packet stream position by len bytes.
* Mustn't consume more than available in the current packet */
static void
tsmux_stream_consume (TsMuxStream * stream, guint len)
{
g_assert (stream->cur_buffer != NULL);
g_assert (len <= stream->cur_buffer->size - stream->cur_buffer_consumed);
stream->cur_buffer_consumed += len;
stream->bytes_avail -= len;
if (stream->cur_buffer_consumed == 0)
return;
if (GST_CLOCK_STIME_IS_VALID (stream->cur_buffer->pts)) {
stream->last_pts = stream->cur_buffer->pts;
stream->last_dts = stream->cur_buffer->dts;
} else if (GST_CLOCK_STIME_IS_VALID (stream->cur_buffer->dts))
stream->last_dts = stream->cur_buffer->dts;
if (stream->cur_buffer_consumed == stream->cur_buffer->size) {
/* Current packet is completed, move along */
stream->buffers = g_list_delete_link (stream->buffers, stream->buffers);
if (stream->buffer_release) {
stream->buffer_release (stream->cur_buffer->data,
stream->cur_buffer->user_data);
}
g_slice_free (TsMuxStreamBuffer, stream->cur_buffer);
stream->cur_buffer = NULL;
/* FIXME: As a hack, for unbounded streams, start a new PES packet for each
* incoming packet we receive. This assumes that incoming data is
* packetised sensibly - ie, every video frame */
if (stream->cur_pes_payload_size == 0)
stream->state = TSMUX_STREAM_STATE_HEADER;
}
}
/**
* tsmux_stream_at_pes_start:
* @stream: a #TsMuxStream
*
* Check if @stream is at the start of a PES packet.
*
* Returns: TRUE if @stream is at a PES header packet.
*/
gboolean
tsmux_stream_at_pes_start (TsMuxStream * stream)
{
g_return_val_if_fail (stream != NULL, FALSE);
return stream->state == TSMUX_STREAM_STATE_HEADER;
}
/**
* tsmux_stream_bytes_avail:
* @stream: a #TsMuxStream
*
* Calculate how much bytes are available.
*
* Returns: The number of bytes available.
*/
static inline gint
_tsmux_stream_bytes_avail (TsMuxStream * stream)
{
gint bytes_avail;
g_return_val_if_fail (stream != NULL, 0);
if (stream->cur_pes_payload_size != 0)
bytes_avail = stream->cur_pes_payload_size - stream->pes_bytes_written;
else
bytes_avail = stream->bytes_avail;
bytes_avail = MIN (bytes_avail, stream->bytes_avail);
/* Calculate the number of bytes available in the current PES */
if (stream->state == TSMUX_STREAM_STATE_HEADER)
bytes_avail += tsmux_stream_pes_header_length (stream);
return bytes_avail;
}
gint
tsmux_stream_bytes_avail (TsMuxStream * stream)
{
g_return_val_if_fail (stream != NULL, 0);
return _tsmux_stream_bytes_avail (stream);
}
/**
* tsmux_stream_bytes_in_buffer:
* @stream: a #TsMuxStream
*
* Calculate how much bytes are in the buffer.
*
* Returns: The number of bytes in the buffer.
*/
gint
tsmux_stream_bytes_in_buffer (TsMuxStream * stream)
{
g_return_val_if_fail (stream != NULL, 0);
return stream->bytes_avail;
}
/**
* tsmux_stream_initialize_pes_packet:
* @stream: a #TsMuxStream
*
* Initializes the PES packet.
*
* Returns: TRUE if we the packet was initialized.
*/
gboolean
tsmux_stream_initialize_pes_packet (TsMuxStream * stream)
{
if (stream->state != TSMUX_STREAM_STATE_HEADER)
return TRUE;
if (stream->pes_payload_size != 0) {
/* Use prescribed fixed PES payload size */
stream->cur_pes_payload_size = stream->pes_payload_size;
tsmux_stream_find_pts_dts_within (stream, stream->cur_pes_payload_size,
&stream->pts, &stream->dts);
} else if (stream->is_video_stream) {
/* Unbounded for video streams */
stream->cur_pes_payload_size = 0;
tsmux_stream_find_pts_dts_within (stream, stream->bytes_avail, &stream->pts,
&stream->dts);
} else {
/* Output a PES packet of all currently available bytes otherwise */
stream->cur_pes_payload_size = stream->bytes_avail;
tsmux_stream_find_pts_dts_within (stream, stream->cur_pes_payload_size,
&stream->pts, &stream->dts);
}
stream->pi.flags &= ~(TSMUX_PACKET_FLAG_PES_WRITE_PTS_DTS |
TSMUX_PACKET_FLAG_PES_WRITE_PTS);
if (GST_CLOCK_STIME_IS_VALID (stream->pts)
&& GST_CLOCK_STIME_IS_VALID (stream->dts)
&& stream->pts != stream->dts)
stream->pi.flags |= TSMUX_PACKET_FLAG_PES_WRITE_PTS_DTS;
else {
if (GST_CLOCK_STIME_IS_VALID (stream->pts))
stream->pi.flags |= TSMUX_PACKET_FLAG_PES_WRITE_PTS;
}
if (stream->buffers) {
TsMuxStreamBuffer *buf = (TsMuxStreamBuffer *) (stream->buffers->data);
if (buf->random_access) {
stream->pi.flags |= TSMUX_PACKET_FLAG_RANDOM_ACCESS;
stream->pi.flags |= TSMUX_PACKET_FLAG_ADAPTATION;
}
}
return TRUE;
}
/**
* tsmux_stream_get_data:
* @stream: a #TsMuxStream
* @buf: a buffer to hold the result
* @len: the length of @buf
*
* Copy up to @len available data in @stream into the buffer @buf.
*
* Returns: TRUE if @len bytes could be retrieved.
*/
gboolean
tsmux_stream_get_data (TsMuxStream * stream, guint8 * buf, guint len)
{
g_return_val_if_fail (stream != NULL, FALSE);
g_return_val_if_fail (buf != NULL, FALSE);
if (stream->state == TSMUX_STREAM_STATE_HEADER) {
guint8 pes_hdr_length;
pes_hdr_length = tsmux_stream_pes_header_length (stream);
/* Submitted buffer must be at least as large as the PES header */
if (len < pes_hdr_length)
return FALSE;
TS_DEBUG ("Writing PES header of length %u and payload %d",
pes_hdr_length, stream->cur_pes_payload_size);
tsmux_stream_write_pes_header (stream, buf);
len -= pes_hdr_length;
buf += pes_hdr_length;
stream->state = TSMUX_STREAM_STATE_PACKET;
}
if (len > (guint) _tsmux_stream_bytes_avail (stream))
return FALSE;
stream->pes_bytes_written += len;
if (stream->cur_pes_payload_size != 0 &&
stream->pes_bytes_written == stream->cur_pes_payload_size) {
TS_DEBUG ("Finished PES packet");
stream->state = TSMUX_STREAM_STATE_HEADER;
stream->pes_bytes_written = 0;
}
while (len > 0) {
guint32 avail;
guint8 *cur;
if (stream->cur_buffer == NULL) {
/* Start next packet */
if (stream->buffers == NULL)
return FALSE;
stream->cur_buffer = (TsMuxStreamBuffer *) (stream->buffers->data);
stream->cur_buffer_consumed = 0;
}
/* Take as much as we can from the current buffer */
avail = stream->cur_buffer->size - stream->cur_buffer_consumed;
cur = stream->cur_buffer->data + stream->cur_buffer_consumed;
if (avail < len) {
memcpy (buf, cur, avail);
tsmux_stream_consume (stream, avail);
buf += avail;
len -= avail;
} else {
memcpy (buf, cur, len);
tsmux_stream_consume (stream, len);
len = 0;
}
}
return TRUE;
}
static guint8
tsmux_stream_pes_header_length (TsMuxStream * stream)
{
guint8 packet_len;
/* Calculate the length of the header for this stream */
/* start_code prefix + stream_id + pes_packet_length = 6 bytes */
packet_len = 6;
if (stream->pi.flags & TSMUX_PACKET_FLAG_PES_FULL_HEADER) {
/* For a PES 'full header' we have at least 3 more bytes,
* and then more based on flags */
packet_len += 3;
if (stream->pi.flags & TSMUX_PACKET_FLAG_PES_WRITE_PTS_DTS) {
packet_len += 10;
} else if (stream->pi.flags & TSMUX_PACKET_FLAG_PES_WRITE_PTS) {
packet_len += 5;
}
if (stream->pi.flags & TSMUX_PACKET_FLAG_PES_EXT_STREAMID) {
/* Need basic extension flags (1 byte), plus 2 more bytes for the
* length + extended stream id */
packet_len += 3;
}
if (stream->pi.pes_header_length) {
/* check for consistency, then we can add stuffing */
g_assert (packet_len <= stream->pi.pes_header_length + 6 + 3);
packet_len = stream->pi.pes_header_length + 6 + 3;
}
}
return packet_len;
}
/* Find a PTS/DTS to write into the pes header within the next bound bytes
* of the data */
static void
tsmux_stream_find_pts_dts_within (TsMuxStream * stream, guint bound,
gint64 * pts, gint64 * dts)
{
GList *cur;
*pts = GST_CLOCK_STIME_NONE;
*dts = GST_CLOCK_STIME_NONE;
for (cur = stream->buffers; cur; cur = cur->next) {
TsMuxStreamBuffer *curbuf = cur->data;
/* FIXME: This isn't quite correct - if the 'bound' is within this
* buffer, we don't know if the timestamp is before or after the split
* so we shouldn't return it */
if (bound <= curbuf->size) {
*pts = curbuf->pts;
*dts = curbuf->dts;
return;
}
/* Have we found a buffer with pts/dts set? */
if (GST_CLOCK_STIME_IS_VALID (curbuf->pts)
|| GST_CLOCK_STIME_IS_VALID (curbuf->dts)) {
*pts = curbuf->pts;
*dts = curbuf->dts;
return;
}
bound -= curbuf->size;
}
}
static void
tsmux_stream_write_pes_header (TsMuxStream * stream, guint8 * data)
{
guint16 length_to_write;
guint8 hdr_len = tsmux_stream_pes_header_length (stream);
guint8 *orig_data = data;
/* start_code prefix + stream_id + pes_packet_length = 6 bytes */
data[0] = 0x00;
data[1] = 0x00;
data[2] = 0x01;
data[3] = stream->id;
data += 4;
/* Write 2 byte PES packet length here. 0 (unbounded) is only
* valid for video packets */
if (stream->cur_pes_payload_size != 0) {
length_to_write = hdr_len + stream->cur_pes_payload_size - 6;
} else {
length_to_write = 0;
}
tsmux_put16 (&data, length_to_write);
if (stream->pi.flags & TSMUX_PACKET_FLAG_PES_FULL_HEADER) {
guint8 flags = 0;
/* Not scrambled, original, not-copyrighted, data_alignment not specified */
flags = 0x81;
if (stream->pi.flags & TSMUX_PACKET_FLAG_PES_DATA_ALIGNMENT)
flags |= 0x4;
*data++ = flags;
flags = 0;
/* Flags */
if (stream->pi.flags & TSMUX_PACKET_FLAG_PES_WRITE_PTS_DTS)
flags |= 0xC0;
else if (stream->pi.flags & TSMUX_PACKET_FLAG_PES_WRITE_PTS)
flags |= 0x80;
if (stream->pi.flags & TSMUX_PACKET_FLAG_PES_EXT_STREAMID)
flags |= 0x01; /* Enable PES_extension_flag */
*data++ = flags;
/* Header length is the total pes length,
* minus the 9 bytes of start codes, flags + hdr_len */
g_return_if_fail (hdr_len >= 9);
*data++ = (hdr_len - 9);
if (stream->pi.flags & TSMUX_PACKET_FLAG_PES_WRITE_PTS_DTS) {
tsmux_put_ts (&data, 0x3, stream->pts);
tsmux_put_ts (&data, 0x1, stream->dts);
} else if (stream->pi.flags & TSMUX_PACKET_FLAG_PES_WRITE_PTS) {
tsmux_put_ts (&data, 0x2, stream->pts);
}
if (stream->pi.flags & TSMUX_PACKET_FLAG_PES_EXT_STREAMID) {
guint8 ext_len;
flags = 0x0f; /* (reserved bits) | PES_extension_flag_2 */
*data++ = flags;
ext_len = 1; /* Only writing 1 byte into the extended fields */
*data++ = 0x80 | ext_len;
/* Write the extended streamID */
*data++ = stream->id_extended;
}
/* write stuffing bytes if fixed PES header length requested */
if (stream->pi.pes_header_length)
while (data < orig_data + stream->pi.pes_header_length + 9)
*data++ = 0xff;
}
}
/**
* tsmux_stream_add_data:
* @stream: a #TsMuxStream
* @data: data to add
* @len: length of @data
* @user_data: user data to pass to release func
* @pts: PTS of access unit in @data
* @dts: DTS of access unit in @data
* @random_access: TRUE if random access point (keyframe)
*
* Submit @len bytes of @data into @stream. @pts and @dts can be set to the
* timestamp (against a 90Hz clock) of the first access unit in @data. A
* timestamp of GST_CLOCK_STIME_NNOE for @pts or @dts means unknown.
*
* @user_data will be passed to the release function as set with
* tsmux_stream_set_buffer_release_func() when @data can be freed.
*/
void
tsmux_stream_add_data (TsMuxStream * stream, guint8 * data, guint len,
void *user_data, gint64 pts, gint64 dts, gboolean random_access)
{
TsMuxStreamBuffer *packet;
g_return_if_fail (stream != NULL);
packet = g_slice_new (TsMuxStreamBuffer);
packet->data = data;
packet->size = len;
packet->user_data = user_data;
packet->random_access = random_access;
packet->pts = pts;
packet->dts = dts;
if (stream->bytes_avail == 0)
stream->last_pts = pts;
stream->bytes_avail += len;
stream->buffers = g_list_append (stream->buffers, packet);
}
/**
* tsmux_stream_get_es_descrs:
* @stream: a #TsMuxStream
* @buf: a buffer to hold the ES descriptor
* @len: the length used in @buf
*
* Write an Elementary Stream Descriptor for @stream into @buf. the number of
* bytes consumed in @buf will be updated in @len.
*
* @buf and @len must be at least #TSMUX_MIN_ES_DESC_LEN.
*/
void
tsmux_stream_get_es_descrs (TsMuxStream * stream,
GstMpegtsPMTStream * pmt_stream)
{
GstMpegtsDescriptor *descriptor;
g_return_if_fail (stream != NULL);
g_return_if_fail (pmt_stream != NULL);
/* Based on the stream type, write out any descriptors to go in the
* PMT ES_info field */
/* tag (registration_descriptor), length, format_identifier */
switch (stream->stream_type) {
case TSMUX_ST_AUDIO_AAC:
/* FIXME */
break;
case TSMUX_ST_VIDEO_MPEG4:
/* FIXME */
break;
case TSMUX_ST_VIDEO_H264:
{
/* FIXME : Not sure about this additional_identification_info */
guint8 add_info[] = { 0xFF, 0x1B, 0x44, 0x3F };
descriptor = gst_mpegts_descriptor_from_registration ("HDMV",
add_info, 4);
g_ptr_array_add (pmt_stream->descriptors, descriptor);
break;
}
case TSMUX_ST_VIDEO_DIRAC:
descriptor = gst_mpegts_descriptor_from_registration ("drac", NULL, 0);
g_ptr_array_add (pmt_stream->descriptors, descriptor);
break;
case TSMUX_ST_PS_AUDIO_AC3:
{
guint8 add_info[6];
guint8 *pos;
pos = add_info;
/* audio_stream_descriptor () | ATSC A/52-2001 Annex A
*
* descriptor_tag 8 uimsbf
* descriptor_length 8 uimsbf
* sample_rate_code 3 bslbf
* bsid 5 bslbf
* bit_rate_code 6 bslbf
* surround_mode 2 bslbf
* bsmod 3 bslbf
* num_channels 4 bslbf
* full_svc 1 bslbf
* langcod 8 bslbf
* [...]
*/
*pos++ = 0x81;
*pos++ = 0x04;
/* 3 bits sample_rate_code, 5 bits hardcoded bsid (default ver 8) */
switch (stream->audio_sampling) {
case 48000:
*pos++ = 0x08;
break;
case 44100:
*pos++ = 0x28;
break;
case 32000:
*pos++ = 0x48;
break;
default:
*pos++ = 0xE8;
break; /* 48, 44.1 or 32 Khz */
}
/* 1 bit bit_rate_limit, 5 bits bit_rate_code, 2 bits suround_mode */
switch (stream->audio_bitrate) {
case 32:
*pos++ = 0x00 << 2;
break;
case 40:
*pos++ = 0x01 << 2;
break;
case 48:
*pos++ = 0x02 << 2;
break;
case 56:
*pos++ = 0x03 << 2;
break;
case 64:
*pos++ = 0x04 << 2;
break;
case 80:
*pos++ = 0x05 << 2;
break;
case 96:
*pos++ = 0x06 << 2;
break;
case 112:
*pos++ = 0x07 << 2;
break;
case 128:
*pos++ = 0x08 << 2;
break;
case 160:
*pos++ = 0x09 << 2;
break;
case 192:
*pos++ = 0x0A << 2;
break;
case 224:
*pos++ = 0x0B << 2;
break;
case 256:
*pos++ = 0x0C << 2;
break;
case 320:
*pos++ = 0x0D << 2;
break;
case 384:
*pos++ = 0x0E << 2;
break;
case 448:
*pos++ = 0x0F << 2;
break;
case 512:
*pos++ = 0x10 << 2;
break;
case 576:
*pos++ = 0x11 << 2;
break;
case 640:
*pos++ = 0x12 << 2;
break;
default:
*pos++ = 0x32 << 2;
break; /* 640 Kb/s upper limit */
}
/* 3 bits bsmod, 4 bits num_channels, 1 bit full_svc */
switch (stream->audio_channels) {
case 1:
*pos++ = 0x01 << 1;
break; /* 1/0 */
case 2:
*pos++ = 0x02 << 1;
break; /* 2/0 */
case 3:
*pos++ = 0x0A << 1;
break; /* <= 3 */
case 4:
*pos++ = 0x0B << 1;
break; /* <= 4 */
case 5:
*pos++ = 0x0C << 1;
break; /* <= 5 */
case 6:
default:
*pos++ = 0x0D << 1;
break; /* <= 6 */
}
*pos++ = 0x00;
descriptor = gst_mpegts_descriptor_from_registration ("AC-3",
add_info, 6);
g_ptr_array_add (pmt_stream->descriptors, descriptor);
break;
}
case TSMUX_ST_PS_AUDIO_DTS:
/* FIXME */
break;
case TSMUX_ST_PS_AUDIO_LPCM:
/* FIXME */
break;
case TSMUX_ST_PS_TELETEXT:
/* FIXME empty descriptor for now;
* should be provided by upstream in event or so ? */
descriptor =
gst_mpegts_descriptor_from_custom (GST_MTS_DESC_DVB_TELETEXT, 0, 1);
g_ptr_array_add (pmt_stream->descriptors, descriptor);
break;
case TSMUX_ST_PS_DVB_SUBPICTURE:
/* falltrough ...
* that should never happen anyway as
* dvb subtitles are private data */
case TSMUX_ST_PRIVATE_DATA:
if (stream->is_dvb_sub) {
GST_DEBUG ("Stream language %s", stream->language);
/* Simple DVB subtitles with no monitor aspect ratio critical
FIXME, how do we make it settable? */
/* Default composition page ID */
/* Default ancillary_page_id */
descriptor =
gst_mpegts_descriptor_from_dvb_subtitling (stream->language, 0x10,
0x0001, 0x0152);
g_ptr_array_add (pmt_stream->descriptors, descriptor);
break;
}
if (stream->is_meta) {
descriptor = gst_mpegts_descriptor_from_registration ("KLVA", NULL, 0);
GST_ERROR ("adding KLVA registration descriptor!");
g_ptr_array_add (pmt_stream->descriptors, descriptor);
}
default:
break;
}
}
/**
* tsmux_stream_pcr_ref:
* @stream: a #TsMuxStream
*
* Mark the stream as being used as the PCR for some program.
*/
void
tsmux_stream_pcr_ref (TsMuxStream * stream)
{
g_return_if_fail (stream != NULL);
stream->pcr_ref++;
}
/**
* tsmux_stream_pcr_unref:
* @stream: a #TsMuxStream
*
* Mark the stream as no longer being used as the PCR for some program.
*/
void
tsmux_stream_pcr_unref (TsMuxStream * stream)
{
g_return_if_fail (stream != NULL);
stream->pcr_ref--;
}
/**
* tsmux_stream_is_pcr:
* @stream: a #TsMuxStream
*
* Check if @stream is used as the PCR for some program.
*
* Returns: TRUE if the stream is in use as the PCR for some program.
*/
gboolean
tsmux_stream_is_pcr (TsMuxStream * stream)
{
return stream->pcr_ref != 0;
}
/**
* tsmux_stream_get_pts:
* @stream: a #TsMuxStream
*
* Return the PTS of the last buffer that has had bytes written and
* which _had_ a PTS in @stream.
*
* Returns: the PTS of the last buffer in @stream.
*/
guint64
tsmux_stream_get_pts (TsMuxStream * stream)
{
g_return_val_if_fail (stream != NULL, GST_CLOCK_STIME_NONE);
return stream->last_pts;
}
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