mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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6053dd0d1b
`tsmux_stream_default_get_es_descrs` is missing the `user_data` parameter and shouldn't be cast to `TsMuxStreamGetESDescriptorsFunc`. Prefer not casting at all to make sure we don't miss such an issue. Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/5496>
382 lines
11 KiB
C
382 lines
11 KiB
C
/* ATSC Transport Stream muxer
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* Copyright (C) 2019 Mathieu Duponchelle <mathieu@centricular.com>
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*
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* atscmux.c:
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*
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* SPDX-License-Identifier: LGPL-2.0-or-later
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "gstatscmux.h"
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GST_DEBUG_CATEGORY (gst_atsc_mux_debug);
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#define GST_CAT_DEFAULT gst_atsc_mux_debug
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G_DEFINE_TYPE (GstATSCMux, gst_atsc_mux, GST_TYPE_BASE_TS_MUX);
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GST_ELEMENT_REGISTER_DEFINE (atscmux, "atscmux", GST_RANK_PRIMARY,
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gst_atsc_mux_get_type ());
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#define parent_class gst_atsc_mux_parent_class
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#define ATSCMUX_ST_PS_AUDIO_EAC3 0x87
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static GstStaticPadTemplate gst_atsc_mux_src_factory =
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GST_STATIC_PAD_TEMPLATE ("src",
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GST_PAD_SRC,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS ("video/mpegts, "
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"systemstream = (boolean) true, " "packetsize = (int) 188 ")
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);
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static GstStaticPadTemplate gst_atsc_mux_sink_factory =
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GST_STATIC_PAD_TEMPLATE ("sink_%d",
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GST_PAD_SINK,
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GST_PAD_REQUEST,
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GST_STATIC_CAPS ("video/mpeg, "
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"parsed = (boolean) TRUE, "
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"mpegversion = (int) 2, "
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"systemstream = (boolean) false; "
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"video/x-h264,stream-format=(string)byte-stream,"
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"alignment=(string){au, nal}; "
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"audio/x-ac3, framed = (boolean) TRUE;"
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"audio/x-eac3, framed = (boolean) TRUE;"));
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/* Internals */
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static void
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gst_atsc_mux_stream_get_es_descrs (TsMuxStream * stream,
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GstMpegtsPMTStream * pmt_stream, gpointer user_data)
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{
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GstMpegtsDescriptor *descriptor;
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if (stream->stream_type == ATSCMUX_ST_PS_AUDIO_EAC3) {
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guint8 add_info[4];
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guint8 *pos;
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pos = add_info;
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/* audio_stream_descriptor () | ATSC A/52-2018 Annex G
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*
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* descriptor_tag 8 uimsbf
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* descriptor_length 8 uimsbf
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* reserved 1 '1'
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* bsid_flag 1 bslbf
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* mainid_flag 1 bslbf
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* asvc_flag 1 bslbf
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* mixinfoexists 1 bslbf
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* substream1_flag 1 bslbf
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* substream2_flag 1 bslbf
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* substream3_flag 1 bslbf
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* reserved 1 '1'
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* full_service_flag 1 bslbf
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* audio_service_type 3 uimsbf
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* number_of_channels 3 uimsbf
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* [...]
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*/
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*pos++ = 0xCC;
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*pos++ = 2;
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/* 1 bit reserved, all other flags unset */
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*pos++ = 0x80;
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/* 1 bit reserved,
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* 1 bit set for full_service_flag,
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* 3 bits hardcoded audio_service_type "Complete Main",
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* 3 bits number_of_channels
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*/
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switch (stream->audio_channels) {
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case 1:
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*pos++ = 0xC0; /* Mono */
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break;
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case 2:
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*pos++ = 0xC0 | 0x2; /* 2-channel (stereo) */
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break;
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case 3:
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case 4:
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case 5:
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*pos++ = 0xC0 | 0x4; /* Multichannel audio (> 2 channels; <= 3/2 + LFE channels) */
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break;
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case 6:
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default:
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*pos++ = 0xC0 | 0x5; /* Multichannel audio(> 3/2 + LFE channels) */
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}
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descriptor = gst_mpegts_descriptor_from_registration ("EAC3", add_info, 4);
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g_ptr_array_add (pmt_stream->descriptors, descriptor);
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descriptor =
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gst_mpegts_descriptor_from_custom (GST_MTS_DESC_ATSC_EAC3, add_info, 4);
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g_ptr_array_add (pmt_stream->descriptors, descriptor);
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} else if (stream->stream_type == TSMUX_ST_PS_AUDIO_AC3) {
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int wr_size = 0;
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guint8 *add_info = NULL;
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guint8 data;
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guint bitrate;
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gboolean has_language;
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guint bitrates[20][2] = {
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{32000, 0x00}
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,
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{40000, 0x01}
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,
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{48000, 0x02}
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,
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{56000, 0x03}
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,
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{64000, 0x04}
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,
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{80000, 0x05}
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,
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{96000, 0x06}
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,
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{112000, 0x07}
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,
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{128000, 0x08}
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,
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{160000, 0x09}
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,
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{192000, 0x0A}
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,
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{224000, 0x0B}
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,
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{256000, 0x0C}
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,
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{320000, 0x0D}
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,
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{384000, 0x0E}
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,
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{448000, 0x0F}
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,
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{512000, 0x10}
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,
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{576000, 0x11}
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,
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{640000, 0x12}
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};
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gint i;
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guint bitrate_code = 0x12;
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GstByteWriter writer;
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gst_byte_writer_init_with_size (&writer, 7, FALSE);
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/* audio_stream_descriptor () | ATSC A/52-2001 Annex A
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*
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* descriptor_tag 8 uimsbf
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* descriptor_length 8 uimsbf
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* sample_rate_code 3 bslbf
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* bsid 5 bslbf
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* bit_rate_code 6 bslbf
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* surround_mode 2 bslbf
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* bsmod 3 bslbf
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* num_channels 4 bslbf
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* full_svc 1 bslbf
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* langcod 8 bslbf
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* mainid 3 uimsbf
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* priority 2 bslbf
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* reserved 3 '111'
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* textlen 7 uimsbf
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* text_code 1 bslbf
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* text 8*textlen bslbf
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* language_flag 1 bslbf
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* language_flag_2 1 bslbf
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* reserved 6 '111111'
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* language if flag 3*8 uimbsf
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* language_2 if flag_2 3*8 uimsbf
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*/
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/* 3 bits sample_rate_code, 5 bits hardcoded bsid (default ver 8) */
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switch (stream->audio_sampling) {
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case 48000:
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data = 0x08;
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break;
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case 44100:
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data = 0x28;
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break;
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case 32000:
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data = 0x48;
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break;
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default:
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data = 0xE8;
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break; /* 48, 44.1 or 32 Khz */
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}
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gst_byte_writer_put_uint8 (&writer, data);
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/* 1 bit bit_rate_limit, 5 bits bit_rate_code, 2 bits suround_mode */
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bitrate = MAX (stream->audio_bitrate, stream->max_bitrate);
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for (i = 0; i < G_N_ELEMENTS (bitrates); i++) {
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if (bitrate < bitrates[i][0]) {
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break;
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}
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bitrate_code = bitrates[i][1];
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}
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data = bitrate_code << 2;
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data |= 0x80; /* This is a maximum bitrate */
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gst_byte_writer_put_uint8 (&writer, data);
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/* 3 bits bsmod, 4 bits num_channels, 1 bit full_svc */
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switch (stream->audio_channels) {
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case 1:
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data = 0x01 << 1;
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break; /* 1/0 */
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case 2:
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data = 0x02 << 1;
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break; /* 2/0 */
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case 3:
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data = 0x0A << 1;
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break; /* <= 3 */
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case 4:
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data = 0x0B << 1;
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break; /* <= 4 */
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case 5:
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data = 0x0C << 1;
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break; /* <= 5 */
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case 6:
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default:
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data = 0x0D << 1;
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break; /* <= 6 */
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}
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data |= 0x01; /* full_svc is hardcoded to 1 for now */
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gst_byte_writer_put_uint8 (&writer, data);
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/* deprecated langcod */
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data = 0xff;
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gst_byte_writer_put_uint8 (&writer, data);
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/* langcod2 skipped because num_channels > 0 (no dual mono) */
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/* 3 bits mainid, 2 bits priority, 3 bits reserved */
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data = 0x0f;
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gst_byte_writer_put_uint8 (&writer, data);
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/* 7 bits textlen, 1 bit text_code */
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data = 0x00;
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gst_byte_writer_put_uint8 (&writer, data);
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/* no text provided, jumping directly to language */
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has_language = (stream->language[0] != '\0');
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if (has_language) {
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data = 0xbf;
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gst_byte_writer_put_uint8 (&writer, data);
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gst_byte_writer_put_data (&writer, (guint8 *) stream->language, 3);
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} else {
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data = 0x3f;
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gst_byte_writer_put_uint8 (&writer, data);
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}
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descriptor = gst_mpegts_descriptor_from_registration ("AC-3", NULL, 0);
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g_ptr_array_add (pmt_stream->descriptors, descriptor);
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wr_size = gst_byte_writer_get_size (&writer);
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add_info = gst_byte_writer_reset_and_get_data (&writer);
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descriptor =
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gst_mpegts_descriptor_from_custom (GST_MTS_DESC_AC3_AUDIO_STREAM,
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add_info, wr_size);
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g_ptr_array_add (pmt_stream->descriptors, descriptor);
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} else {
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tsmux_stream_default_get_es_descrs (stream, pmt_stream);
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}
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}
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static TsMuxStream *
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gst_atsc_mux_create_new_stream (guint16 new_pid, TsMuxStreamType stream_type,
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guint stream_number, gpointer user_data)
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{
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TsMuxStream *ret = tsmux_stream_new (new_pid, stream_type, stream_number);
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if (stream_type == ATSCMUX_ST_PS_AUDIO_EAC3) {
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ret->id = 0xBD;
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ret->pi.flags |= TSMUX_PACKET_FLAG_PES_FULL_HEADER;
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ret->is_audio = TRUE;
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} else if (stream_type == TSMUX_ST_PS_AUDIO_AC3) {
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ret->id = 0xBD;
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ret->id_extended = 0;
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}
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tsmux_stream_set_get_es_descriptors_func (ret,
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gst_atsc_mux_stream_get_es_descrs, user_data);
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return ret;
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}
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/* GstBaseTsMux implementation */
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static TsMux *
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gst_atsc_mux_create_ts_mux (GstBaseTsMux * mpegtsmux)
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{
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TsMux *ret = ((GstBaseTsMuxClass *) parent_class)->create_ts_mux (mpegtsmux);
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GstMpegtsAtscMGT *mgt;
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GstMpegtsAtscSTT *stt;
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GstMpegtsAtscRRT *rrt;
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GstMpegtsSection *section;
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mgt = gst_mpegts_atsc_mgt_new ();
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section = gst_mpegts_section_from_atsc_mgt (mgt);
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tsmux_add_mpegts_si_section (ret, section);
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stt = gst_mpegts_atsc_stt_new ();
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section = gst_mpegts_section_from_atsc_stt (stt);
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tsmux_add_mpegts_si_section (ret, section);
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rrt = gst_mpegts_atsc_rrt_new ();
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section = gst_mpegts_section_from_atsc_rrt (rrt);
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tsmux_add_mpegts_si_section (ret, section);
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tsmux_set_new_stream_func (ret, gst_atsc_mux_create_new_stream, mpegtsmux);
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return ret;
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}
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static guint
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gst_atsc_mux_handle_media_type (GstBaseTsMux * mux, const gchar * media_type,
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GstBaseTsMuxPad * pad)
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{
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guint ret = TSMUX_ST_RESERVED;
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if (!g_strcmp0 (media_type, "audio/x-eac3")) {
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ret = ATSCMUX_ST_PS_AUDIO_EAC3;
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}
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return ret;
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}
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static void
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gst_atsc_mux_class_init (GstATSCMuxClass * klass)
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{
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GstElementClass *gstelement_class = GST_ELEMENT_CLASS (klass);
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GstBaseTsMuxClass *mpegtsmux_class = (GstBaseTsMuxClass *) klass;
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GST_DEBUG_CATEGORY_INIT (gst_atsc_mux_debug, "atscmux", 0, "ATSC muxer");
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gst_element_class_set_static_metadata (gstelement_class,
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"ATSC Transport Stream Muxer", "Codec/Muxer",
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"Multiplexes media streams into an ATSC-compliant Transport Stream",
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"Mathieu Duponchelle <mathieu@centricular.com>");
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mpegtsmux_class->create_ts_mux = gst_atsc_mux_create_ts_mux;
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mpegtsmux_class->handle_media_type = gst_atsc_mux_handle_media_type;
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gst_element_class_add_static_pad_template_with_gtype (gstelement_class,
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&gst_atsc_mux_sink_factory, GST_TYPE_BASE_TS_MUX_PAD);
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gst_element_class_add_static_pad_template_with_gtype (gstelement_class,
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&gst_atsc_mux_src_factory, GST_TYPE_AGGREGATOR_PAD);
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}
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static void
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gst_atsc_mux_init (GstATSCMux * mux)
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{
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}
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