kopia lustrzana https://github.com/kierank/libmpegts
128 wiersze
4.8 KiB
C
128 wiersze
4.8 KiB
C
/*****************************************************************************
|
|
* hdmv.c : HDMV specific functions
|
|
*****************************************************************************
|
|
* Copyright (C) 2010 Kieran Kunhya
|
|
*
|
|
* 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 Street, Fifth Floor, Boston, MA 02111, USA.
|
|
*****************************************************************************/
|
|
|
|
#include "../common.h"
|
|
#include "hdmv.h"
|
|
|
|
int ts_setup_hdmv_lpcm_stream( ts_writer_t *w, int pid, int num_channels, int sample_rate, int bits_per_sample )
|
|
{
|
|
ts_int_stream_t *stream = find_stream( w, pid );
|
|
|
|
if( !stream )
|
|
{
|
|
fprintf( stderr, "Invalid PID\n" );
|
|
return -1;
|
|
}
|
|
|
|
stream->lpcm_ctx = calloc( 1, sizeof(stream->lpcm_ctx) );
|
|
if( !stream->lpcm_ctx )
|
|
return -1;
|
|
|
|
stream->lpcm_ctx->num_channels = num_channels;
|
|
stream->lpcm_ctx->sample_rate = sample_rate;
|
|
stream->lpcm_ctx->bits_per_sample = bits_per_sample;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int ts_setup_dtcp( ts_writer_t *w, uint8_t byte_1, uint8_t byte_2 )
|
|
{
|
|
w->dtcp_ctx = calloc( 1, sizeof(w->dtcp_ctx) );
|
|
if( !w->dtcp_ctx )
|
|
return -1;
|
|
|
|
w->dtcp_ctx->byte_1 = byte_1;
|
|
w->dtcp_ctx->byte_2 = byte_2;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**** First Loop of PMT Descriptors ****/
|
|
void write_hdmv_copy_control_descriptor( ts_writer_t *w, bs_t *s )
|
|
{
|
|
bs_write( s, 8, HDMV_COPY_CTRL_DESCRIPTOR_TAG ); // descriptor_tag
|
|
bs_write( s, 8, 0x04 ); // descriptor_length
|
|
bs_write( s, 16, 0x0fff ); // CA_System_ID
|
|
bs_write( s, 8, w->dtcp_ctx->byte_1 ); // private_data_byte
|
|
bs_write( s, 8, w->dtcp_ctx->byte_2 ); // private_data_byte
|
|
}
|
|
|
|
/**** Second Loop of PMT Descriptors ****/
|
|
void write_hdmv_video_registration_descriptor( bs_t *s, ts_int_stream_t *stream )
|
|
{
|
|
char *format_id = "HDMV";
|
|
|
|
bs_write( s, 8, REGISTRATION_DESCRIPTOR_TAG ); // descriptor_tag
|
|
bs_write( s, 8, 0x8 ); // descriptor_length
|
|
while( *format_id != '\0' )
|
|
bs_write( s, 8, *format_id++ ); // format_identifier
|
|
|
|
bs_write( s, 8, 0xff ); // stuffing_bits
|
|
bs_write( s, 8, stream->stream_id ); // stream_coding_type
|
|
bs_write( s, 4, stream->hdmv_video_format ); // video_format
|
|
bs_write( s, 4, stream->hdmv_frame_rate ); // frame_rate
|
|
bs_write( s, 4, stream->hdmv_aspect_ratio ); // aspect_ratio
|
|
bs_write( s, 4, 0xf ); // stuffing_bits
|
|
}
|
|
|
|
void write_hdmv_lpcm_descriptor( bs_t *s, ts_int_stream_t *stream )
|
|
{
|
|
write_registration_descriptor( s, REGISTRATION_DESCRIPTOR_TAG, 8, "HDMV" );
|
|
bs_write( s, 8, 0xff ); // stuffing_bits
|
|
bs_write( s, 8, stream->stream_type ); // stream_coding_type
|
|
|
|
if( stream->lpcm_ctx->num_channels == 1 )
|
|
bs_write( s, 4, 1 ); // audio_presentation_type
|
|
else if( stream->lpcm_ctx->num_channels == 2 )
|
|
bs_write( s, 4, 0x03 ); // audio_presentation_type
|
|
else
|
|
bs_write( s, 4, 0x06 ); // audio_presentation_type
|
|
|
|
if( stream->lpcm_ctx->sample_rate == 48 )
|
|
bs_write( s, 4, 1 ); // sampling_frequency
|
|
else if( stream->lpcm_ctx->sample_rate == 96 )
|
|
bs_write( s, 4, 0x04 ); // sampling_frequency
|
|
else
|
|
bs_write( s, 4, 0x05 ); // sampling_frequency
|
|
|
|
if( stream->lpcm_ctx->bits_per_sample == 16 )
|
|
bs_write( s, 2, 1 ); // bits_per_sample
|
|
else if( stream->lpcm_ctx->bits_per_sample == 20 )
|
|
bs_write( s, 2, 0x02 ); // bits_per_sample
|
|
else
|
|
bs_write( s, 2, 0x03 ); // bits_per_sample
|
|
|
|
bs_write( s, 6, 0x3f ); // stuffing_bits
|
|
|
|
}
|
|
|
|
/**** In loop of SIT ****/
|
|
void write_partial_ts_descriptor( ts_writer_t *w, bs_t *s )
|
|
{
|
|
bs_write( s, 8, HDMV_PARTIAL_TS_DESCRIPTOR_TAG ); // descriptor_tag
|
|
bs_write( s, 8, 0x08 ); // descriptor_length
|
|
bs_write( s, 2, 0x03 ); // DVB_reserved_future_use
|
|
bs_write( s, 22, w->ts_muxrate / 400 ); // peak_rate
|
|
bs_write( s, 2, 0x03 ); // DVB_reserved_future_use
|
|
bs_write( s, 22, 0x3fffff ); // minimum_overall_smoothing_rate
|
|
bs_write( s, 2, 0x03 ); // DVB_reserved_future_use
|
|
bs_write( s, 14, 0x3fff ); // maximum_overall_smoothing_buffer
|
|
}
|