--- /dev/null
+/*****************************************************************************
+ * aribcam.c : ARIB STB-B25 software CAM stream filter
+ *****************************************************************************
+ * Copyright (C) 2014 VideoLAN and authors
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
+ *****************************************************************************/
+
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
+#include <vlc_common.h>
+#include <vlc_plugin.h>
+#include <vlc_stream.h>
+
+#include <inttypes.h>
+#include <assert.h>
+
+#include <arib-std-b25/arib_std_b25.h>
+#include <arib-std-b25/arib_std_b25_error_code.h>
+#include <arib-std-b25/b_cas_card.h>
+#include <arib-std-b25/b_cas_card_error_code.h>
+
+static int Open(vlc_object_t *);
+static void Close(vlc_object_t *);
+
+vlc_module_begin ()
+ set_category (CAT_INPUT)
+ set_subcategory (SUBCAT_INPUT_STREAM_FILTER)
+ set_capability ("stream_filter", 0)
+ add_shortcut("aribcam")
+ set_description (N_("ARIB STD-B25 Cam module"))
+ set_callbacks (Open, Close)
+vlc_module_end ()
+
+struct error_messages_s
+{
+ const int8_t i_error;
+ const char * const psz_error;
+};
+
+static const struct error_messages_s const b25_errors[] =
+{
+ { ARIB_STD_B25_ERROR_INVALID_PARAM, "Invalid parameter" },
+ { ARIB_STD_B25_ERROR_NO_ENOUGH_MEMORY , "Not enough memory" },
+ { ARIB_STD_B25_ERROR_NON_TS_INPUT_STREAM, "Non TS input stream" },
+ { ARIB_STD_B25_ERROR_NO_PAT_IN_HEAD_16M, "No PAT in first 16MB" },
+ { ARIB_STD_B25_ERROR_NO_PMT_IN_HEAD_32M, "No PMT in first 32MB" },
+ { ARIB_STD_B25_ERROR_NO_ECM_IN_HEAD_32M, "No ECM in first 32MB" },
+ { ARIB_STD_B25_ERROR_EMPTY_B_CAS_CARD, "Empty BCAS card" },
+ { ARIB_STD_B25_ERROR_INVALID_B_CAS_STATUS, "Invalid BCAS status" },
+ { ARIB_STD_B25_ERROR_ECM_PROC_FAILURE, "ECM Proc failure" },
+ { ARIB_STD_B25_ERROR_DECRYPT_FAILURE, "Decryption failure" },
+ { ARIB_STD_B25_ERROR_PAT_PARSE_FAILURE, "PAT Parsing failure" },
+ { ARIB_STD_B25_ERROR_PMT_PARSE_FAILURE, "PMT Parsing failure" },
+ { ARIB_STD_B25_ERROR_ECM_PARSE_FAILURE, "ECM Parsing failure" },
+ { ARIB_STD_B25_ERROR_CAT_PARSE_FAILURE, "CAT Parsing failure" },
+ { ARIB_STD_B25_ERROR_EMM_PARSE_FAILURE, "EMM Parsing failure" },
+ { ARIB_STD_B25_ERROR_EMM_PROC_FAILURE, "EMM Proc failure" },
+ { 0, NULL },
+};
+
+static const struct error_messages_s const bcas_errors[] =
+{
+ { B_CAS_CARD_ERROR_INVALID_PARAMETER, "Invalid parameter" },
+ { B_CAS_CARD_ERROR_NOT_INITIALIZED, "Card not initialized" },
+ { B_CAS_CARD_ERROR_NO_SMART_CARD_READER, "No smart card reader" },
+ { B_CAS_CARD_ERROR_ALL_READERS_CONNECTION_FAILED, "Reader connection failed" },
+ { B_CAS_CARD_ERROR_NO_ENOUGH_MEMORY, "Not enough memory" },
+ { B_CAS_CARD_ERROR_TRANSMIT_FAILED, "Transmission failed" },
+ { 0, NULL },
+};
+
+struct stream_sys_t
+{
+ ARIB_STD_B25 *p_b25;
+ B_CAS_CARD *p_bcas;
+ struct
+ {
+ uint8_t *p_buf;
+ size_t i_size;
+ block_t *p_list;
+ } remain;
+
+ size_t i_pos;
+ bool b_unitsizeset;
+};
+
+static int Peek( stream_t *, const uint8_t **, unsigned int );
+
+static const char * GetErrorMessage( const int i_error,
+ const struct error_messages_s const *p_errors_messages )
+{
+ int i = 0;
+ while( p_errors_messages[i].psz_error )
+ {
+ if ( p_errors_messages[i].i_error == i_error )
+ return p_errors_messages[i].psz_error;
+ i++;
+ }
+ return "unkown error";
+}
+
+static size_t RemainRead( stream_t *p_stream, uint8_t *p_data, size_t i_toread, bool b_peek )
+{
+ stream_sys_t *p_sys = p_stream->p_sys;
+
+ size_t i_total = 0;
+
+ while( p_sys->remain.p_list && i_toread )
+ {
+ size_t i_copy = __MIN( i_toread, p_sys->remain.p_list->i_buffer );
+ memcpy( p_data, p_sys->remain.p_list->p_buffer, i_copy );
+
+ i_toread -= i_copy;
+ i_total += i_copy;
+ p_data += i_copy;
+
+ if ( !b_peek )
+ {
+ /* update block data pointer and release if no longer needed */
+ p_sys->remain.p_list->i_buffer -= i_copy;
+ p_sys->remain.p_list->p_buffer += i_copy;
+ p_sys->remain.i_size -= i_copy;
+
+ if ( p_sys->remain.p_list->i_buffer == 0 )
+ {
+ block_t *p_prevhead = p_sys->remain.p_list;
+ p_sys->remain.p_list = p_sys->remain.p_list->p_next;
+ block_Release( p_prevhead );
+ }
+ }
+ else
+ p_sys->remain.p_list = p_sys->remain.p_list->p_next;
+ }
+ return i_total;
+}
+
+static bool RemainAdd( stream_t *p_stream, const uint8_t *p_data, size_t i_size )
+{
+ stream_sys_t *p_sys = p_stream->p_sys;
+ if ( i_size == 0 )
+ return true;
+ block_t *p_block = block_Alloc( i_size );
+ if ( !p_block )
+ return false;
+ memcpy( p_block->p_buffer, p_data, i_size );
+ p_block->i_buffer = i_size;
+ block_ChainAppend( & p_sys->remain.p_list, p_block );
+ p_sys->remain.i_size += i_size;
+ return true;
+}
+
+static void RemainFlush( stream_sys_t *p_sys )
+{
+ block_ChainRelease( p_sys->remain.p_list );
+ p_sys->remain.p_list = NULL;
+ p_sys->remain.i_size = 0;
+}
+
+#define ALL_READY (UNIT_SIZE_READY|ECM_READY|PMT_READY)
+
+static int DecoderRead( stream_t *p_stream, uint8_t *p_dst, int i_toread, bool b_peek )
+{
+ stream_sys_t *p_sys = p_stream->p_sys;
+ ARIB_STD_B25_BUFFER getbuf = { NULL, 0 };
+ int i_total_read = 0;
+ int i_ret;
+
+ if ( !p_dst || ! i_toread )
+ return -1;
+
+ /* Use data from previous reads */
+ size_t i_fromremain = RemainRead( p_stream, p_dst, i_toread, b_peek );
+ i_toread -= i_fromremain;
+ i_total_read += i_fromremain;
+
+ while( i_toread )
+ {
+
+ do
+ {
+ getbuf.size = 0;
+
+ i_ret = p_sys->p_b25->get( p_sys->p_b25, &getbuf );
+ if ( i_ret < 0 )
+ msg_Err( p_stream, "decoder get failed: %s",
+ GetErrorMessage( i_ret, b25_errors ) );
+
+ /* If the decoders needs buffering or data is not ready, push some */
+ if ( i_ret == 0 && getbuf.size == 0 )
+ {
+ /* make use of the existing buffer,
+ overwritten by decoder data later */
+ int i_srcread = stream_Read( p_stream->p_source, p_dst, i_toread );
+ if ( i_srcread > 0 )
+ {
+ ARIB_STD_B25_BUFFER putbuf = { p_dst, i_srcread };
+ i_ret = p_sys->p_b25->put( p_sys->p_b25, &putbuf );
+ if ( i_ret < 0 )
+ msg_Err( p_stream, "decoder put failed: %s",
+ GetErrorMessage( i_ret, b25_errors ) );
+ }
+ else
+ {
+ if ( i_srcread < 0 )
+ msg_Err( p_stream, "Can't read %d bytes from source stream: %d", i_toread, i_srcread );
+ i_ret = -1;
+ }
+ }
+ }
+ while ( i_ret == 0 && getbuf.size == 0 );
+
+ if ( i_ret < 0 )
+ return -1;
+
+ if ( b_peek )
+ {
+ /* put everything in remain */
+ RemainAdd( p_stream, getbuf.data, getbuf.size );
+ }
+ else
+ {
+ memcpy( p_dst, getbuf.data, __MIN(getbuf.size, i_toread) );
+
+ if ( getbuf.size > i_toread )
+ {
+ /* Hold remaining data for next call */
+ RemainAdd( p_stream, getbuf.data + i_toread, getbuf.size - i_toread );
+ }
+ }
+
+ i_total_read += __MIN(getbuf.size, i_toread);
+ p_dst += __MIN(getbuf.size, i_toread);
+ i_toread -= __MIN(getbuf.size, i_toread);
+
+ }
+
+ return i_total_read;
+}
+
+static int Read( stream_t *p_stream, void *p_buf, unsigned int i_toread )
+{
+ stream_sys_t *p_sys = p_stream->p_sys;
+
+ /* We force unit size from 1st TS packet as the lib wants to auto detect
+ size but requires larger amount of data for that purpose */
+ if ( !p_sys->b_unitsizeset )
+ {
+ if ( i_toread >= 188 && i_toread <= 320 )
+ p_sys->b_unitsizeset = ! p_sys->p_b25->set_unit_size( p_sys->p_b25, i_toread );
+ if ( !p_sys->b_unitsizeset )
+ msg_Warn( p_stream, "Unit size not set." );
+ else
+ msg_Dbg( p_stream, "Set unit size to %u", i_toread );
+ }
+
+ int i_read = DecoderRead( p_stream, p_buf, i_toread, false );
+ if ( i_read < 0 )
+ return -1;
+ else
+ p_sys->i_pos += i_read;
+ return i_read;
+}
+
+/**
+ *
+ */
+
+static int Peek( stream_t *p_stream, const uint8_t **pp_buf, unsigned int i_len )
+{
+ stream_sys_t *p_sys = p_stream->p_sys;
+ i_len = __MAX(ARIB_STD_B25_TS_PROBING_MIN_DATA, i_len);
+
+ if ( i_len > p_sys->remain.i_size )
+ {
+ uint8_t *p_tmpbuf = malloc( i_len - p_sys->remain.i_size );
+ DecoderRead( p_stream, p_tmpbuf, i_len - p_sys->remain.i_size, true );
+ free( p_tmpbuf );
+ }
+
+ if ( !p_sys->remain.p_list )
+ {
+ assert(p_sys->remain.i_size == 0);
+ /* might not be enough data in the stream to allow returning data */
+ return 0;
+ }
+
+ if ( p_sys->remain.p_list->i_buffer < i_len )
+ {
+ p_sys->remain.p_list = block_ChainGather( p_sys->remain.p_list );
+ if ( !p_sys->remain.p_list )
+ {
+ p_sys->remain.i_size = 0;
+ return 0;
+ }
+ }
+
+ *pp_buf = p_sys->remain.p_list->p_buffer;
+
+ return __MIN(i_len, p_sys->remain.i_size);
+}
+
+static int Seek( stream_t *p_stream, uint64_t i_pos )
+{
+ int i_ret = stream_Seek( p_stream->p_source, i_pos );
+ if ( i_ret == VLC_SUCCESS )
+ {
+ RemainFlush( p_stream->p_sys );
+ p_stream->p_sys->i_pos = i_pos;
+ }
+ return i_ret;
+}
+
+/**
+ *
+ */
+static int Control( stream_t *p_stream, int i_query, va_list args )
+{
+ switch( i_query )
+ {
+ case STREAM_GET_POSITION:
+ *va_arg( args, uint64_t *) = p_stream->p_sys->i_pos;
+ return VLC_SUCCESS;
+ case STREAM_SET_POSITION:
+ return Seek( p_stream, va_arg( args, uint64_t ) );
+ default:
+ return stream_vaControl( p_stream->p_source, i_query, args );
+ }
+}
+
+static int Open( vlc_object_t *p_object )
+{
+ stream_t *p_stream = (stream_t *) p_object;
+
+ int64_t i_stream_size = stream_Size( p_stream->p_source );
+ if ( i_stream_size > 0 && i_stream_size < ARIB_STD_B25_TS_PROBING_MIN_DATA )
+ return VLC_EGENERIC;
+
+ stream_sys_t *p_sys = p_stream->p_sys = calloc( 1, sizeof(*p_sys) );
+ if (p_sys == NULL)
+ return VLC_ENOMEM;
+
+ p_sys->p_b25 = create_arib_std_b25();
+ if ( p_sys->p_b25 )
+ {
+ if ( p_sys->p_b25->set_multi2_round( p_sys->p_b25, 4 ) < 0 )
+ msg_Warn( p_stream, "cannot set B25 round number" );
+
+ if ( p_sys->p_b25->set_strip( p_sys->p_b25, 0 ) < 0 )
+ msg_Warn( p_stream, "cannot set B25 strip option" );
+
+ if ( p_sys->p_b25->set_emm_proc( p_sys->p_b25, 0 ) < 0 )
+ msg_Warn( p_stream, "cannot set B25 emm_proc" );
+
+ p_sys->p_bcas = create_b_cas_card();
+ if ( p_sys->p_bcas )
+ {
+ int i_code = p_sys->p_bcas->init( p_sys->p_bcas );
+ if ( i_code < 0 )
+ {
+ /* Card could be just missing */
+ msg_Warn( p_stream, "cannot initialize BCAS card (missing ?): %s",
+ GetErrorMessage( i_code, bcas_errors ) );
+ goto error;
+ }
+
+ B_CAS_ID bcasid;
+ if ( p_sys->p_bcas->get_id( p_sys->p_bcas, &bcasid ) == 0 )
+ {
+ for ( int32_t i=0; i<bcasid.count; i++)
+ {
+ msg_Dbg( p_stream, "BCAS card id 0x%"PRId64" initialized",
+ bcasid.data[i] );
+ }
+ }
+
+ B_CAS_INIT_STATUS bcas_status;
+ if ( p_sys->p_bcas->get_init_status( p_sys->p_bcas, &bcas_status ) == 0 )
+ {
+ msg_Dbg( p_stream, "BCAS card system id 0x%"PRIx32,
+ bcas_status.ca_system_id );
+ }
+
+ i_code = p_sys->p_b25->set_b_cas_card( p_sys->p_b25, p_sys->p_bcas );
+ if ( i_code < 0 )
+ {
+ msg_Err( p_stream, "cannot attach BCAS card to decoder: %s",
+ GetErrorMessage( i_code, bcas_errors ) );
+ goto error;
+ }
+ }
+ else
+ msg_Err( p_stream, "cannot create BCAS card" );
+ }
+ else
+ {
+ msg_Err( p_stream, "cannot create B25 instance" );
+ goto error;
+ }
+
+ p_sys->i_pos = stream_Tell( p_stream->p_source );
+
+ p_stream->pf_read = Read;
+ p_stream->pf_peek = Peek;
+ p_stream->pf_control = Control;
+
+ return VLC_SUCCESS;
+
+error:
+ Close( VLC_OBJECT(p_stream) );
+ return VLC_EGENERIC;
+}
+
+static void Close ( vlc_object_t *p_object )
+{
+ stream_t *p_stream = (stream_t *)p_object;
+ stream_sys_t *p_sys = p_stream->p_sys;
+
+ if ( p_sys->p_bcas )
+ p_sys->p_bcas->release( p_sys->p_bcas );
+
+ if ( p_sys->p_b25 )
+ p_sys->p_b25->release( p_sys->p_b25 );
+
+ free( p_sys );
+}
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