/*****************************************************************************
- * video_yuv.c: YUV transformation functions
+ * video_yuv.c: MMX YUV transformation functions
* Provides functions to perform the YUV conversion. The functions provided here
* are a complete and portable C implementation, and may be replaced in certain
* case by optimized functions.
{
size_t tables_size; /* tables size, in bytes */
- /* Computes tables size - 3 Bpp use 32 bits pixel entries in tables */
- switch( p_vout->i_bytes_per_pixel )
+ /* Computes tables size for 8bbp only */
+ if( p_vout->i_bytes_per_pixel == 1 )
{
- case 1:
tables_size = sizeof( u8 )
* (p_vout->b_grayscale ? GRAY_TABLE_SIZE : PALETTE_TABLE_SIZE);
- break;
- case 2:
- tables_size = sizeof( u16 )
- * (p_vout->b_grayscale ? GRAY_TABLE_SIZE : RGB_TABLE_SIZE);
- break;
- case 3:
- case 4:
- default:
- tables_size = sizeof( u32 )
- * (p_vout->b_grayscale ? GRAY_TABLE_SIZE : RGB_TABLE_SIZE);
- break;
- }
- /* Allocate memory */
- p_vout->yuv.p_base = malloc( tables_size );
- if( p_vout->yuv.p_base == NULL )
+ /* Allocate memory */
+ p_vout->yuv.p_base = malloc( tables_size );
+ if( p_vout->yuv.p_base == NULL )
+ {
+ intf_ErrMsg("error: %s\n", strerror(ENOMEM));
+ return( 1 );
+ }
+ }
+ else
{
- intf_ErrMsg("error: %s\n", strerror(ENOMEM));
- return( 1 );
+ p_vout->yuv.p_base = NULL;
}
/* Allocate memory for conversion buffer and offset array */
*****************************************************************************/
void yuv_MMXEnd( vout_thread_t *p_vout )
{
- free( p_vout->yuv.p_base );
+ if( p_vout->i_bytes_per_pixel == 1 )
+ {
+ free( p_vout->yuv.p_base );
+ }
+
free( p_vout->yuv.p_buffer );
free( p_vout->yuv.p_offset );
}
/* following functions are local */
-/*****************************************************************************
- * SetGammaTable: return intensity table transformed by gamma curve.
- *****************************************************************************
- * pi_table is a table of 256 entries from 0 to 255.
- *****************************************************************************/
-void SetGammaTable( int *pi_table, double f_gamma )
-{
- int i_y; /* base intensity */
-
- /* Use exp(gamma) instead of gamma */
- f_gamma = exp( f_gamma );
-
- /* Build gamma table */
- for( i_y = 0; i_y < 256; i_y++ )
- {
- pi_table[ i_y ] = pow( (double)i_y / 256, f_gamma ) * 256;
- }
- }
-
/*****************************************************************************
* SetYUV: compute tables and set function pointers
+ *****************************************************************************/
if( p_vout->b_grayscale )
{
/* Grayscale: build gray table */
- switch( p_vout->i_bytes_per_pixel )
+ if( p_vout->i_bytes_per_pixel == 1 )
{
- case 1:
- {
- u16 bright[256], transp[256];
+ u16 bright[256], transp[256];
- p_vout->yuv.yuv.p_gray8 = (u8 *)p_vout->yuv.p_base + GRAY_MARGIN;
- for( i_index = 0; i_index < GRAY_MARGIN; i_index++ )
- {
- p_vout->yuv.yuv.p_gray8[ -i_index ] = RGB2PIXEL( p_vout, pi_gamma[0], pi_gamma[0], pi_gamma[0] );
- p_vout->yuv.yuv.p_gray8[ 256 + i_index ] = RGB2PIXEL( p_vout, pi_gamma[255], pi_gamma[255], pi_gamma[255] );
- }
- for( i_index = 0; i_index < 256; i_index++)
- {
- p_vout->yuv.yuv.p_gray8[ i_index ] = pi_gamma[ i_index ];
- bright[ i_index ] = i_index << 8;
- transp[ i_index ] = 0;
- }
- /* the colors have been allocated, we can set the palette */
- p_vout->p_set_palette( p_vout, bright, bright, bright, transp );
- p_vout->i_white_pixel = 0xff;
- p_vout->i_black_pixel = 0x00;
- p_vout->i_gray_pixel = 0x44;
- p_vout->i_blue_pixel = 0x3b;
-
- break;
- }
- case 2:
- p_vout->yuv.yuv.p_gray16 = (u16 *)p_vout->yuv.p_base + GRAY_MARGIN;
- for( i_index = 0; i_index < GRAY_MARGIN; i_index++ )
- {
- p_vout->yuv.yuv.p_gray16[ -i_index ] = RGB2PIXEL( p_vout, pi_gamma[0], pi_gamma[0], pi_gamma[0] );
- p_vout->yuv.yuv.p_gray16[ 256 + i_index ] = RGB2PIXEL( p_vout, pi_gamma[255], pi_gamma[255], pi_gamma[255] );
- }
for( i_index = 0; i_index < 256; i_index++)
{
- p_vout->yuv.yuv.p_gray16[ i_index ] = RGB2PIXEL( p_vout, pi_gamma[i_index], pi_gamma[i_index], pi_gamma[i_index] );
+ bright[ i_index ] = i_index << 8;
+ transp[ i_index ] = 0;
}
- break;
- case 3:
- case 4:
- p_vout->yuv.yuv.p_gray32 = (u32 *)p_vout->yuv.p_base + GRAY_MARGIN;
- for( i_index = 0; i_index < GRAY_MARGIN; i_index++ )
- {
- p_vout->yuv.yuv.p_gray32[ -i_index ] = RGB2PIXEL( p_vout, pi_gamma[0], pi_gamma[0], pi_gamma[0] );
- p_vout->yuv.yuv.p_gray32[ 256 + i_index ] = RGB2PIXEL( p_vout, pi_gamma[255], pi_gamma[255], pi_gamma[255] );
- }
- for( i_index = 0; i_index < 256; i_index++)
- {
- p_vout->yuv.yuv.p_gray32[ i_index ] = RGB2PIXEL( p_vout, pi_gamma[i_index], pi_gamma[i_index], pi_gamma[i_index] );
- }
- break;
- }
+ /* the colors have been allocated, we can set the palette */
+ p_vout->p_set_palette( p_vout, bright, bright, bright, transp );
+ p_vout->i_white_pixel = 0xff;
+ p_vout->i_black_pixel = 0x00;
+ p_vout->i_gray_pixel = 0x44;
+ p_vout->i_blue_pixel = 0x3b;
+ }
}
else
{
/* Color: build red, green and blue tables */
- switch( p_vout->i_bytes_per_pixel )
+ if( p_vout->i_bytes_per_pixel == 1 )
{
- case 1:
+ #define RGB_MIN 0
+ #define RGB_MAX 255
+ #define CLIP( x ) ( ((x < 0) ? 0 : (x > 255) ? 255 : x) << 8 )
+ #define SHIFT 20
+ #define U_GREEN_COEF ((int)(-0.391 * (1<<SHIFT) / 1.164))
+ #define U_BLUE_COEF ((int)(2.018 * (1<<SHIFT) / 1.164))
+ #define V_RED_COEF ((int)(1.596 * (1<<SHIFT) / 1.164))
+ #define V_GREEN_COEF ((int)(-0.813 * (1<<SHIFT) / 1.164))
+
+ int y,u,v;
+ int r,g,b;
+ int uvr, uvg, uvb;
+ int i = 0, j = 0;
+ u16 red[256], green[256], blue[256], transp[256];
+ unsigned char lookup[PALETTE_TABLE_SIZE];
+
+ p_vout->yuv.yuv.p_rgb8 = (u8 *)p_vout->yuv.p_base;
+
+ /* this loop calculates the intersection of an YUV box
+ * and the RGB cube. */
+ for ( y = 0; y <= 256; y += 16 )
{
- #define RGB_MIN 0
- #define RGB_MAX 255
- #define CLIP( x ) ( ((x < 0) ? 0 : (x > 255) ? 255 : x) << 8 )
-
- int y,u,v;
- int r,g,b;
- int uvr, uvg, uvb;
- int i = 0, j = 0;
- u16 red[256], green[256], blue[256], transp[256];
- unsigned char lookup[PALETTE_TABLE_SIZE];
-
- p_vout->yuv.yuv.p_rgb8 = (u8 *)p_vout->yuv.p_base;
-
- /* this loop calculates the intersection of an YUV box
- * and the RGB cube. */
- for ( y = 0; y <= 256; y += 16 )
+ for ( u = 0; u <= 256; u += 32 )
+ for ( v = 0; v <= 256; v += 32 )
{
- for ( u = 0; u <= 256; u += 32 )
- for ( v = 0; v <= 256; v += 32 )
+ uvr = (V_RED_COEF*(v-128)) >> SHIFT;
+ uvg = (U_GREEN_COEF*(u-128) + V_GREEN_COEF*(v-128)) >> SHIFT;
+ uvb = (U_BLUE_COEF*(u-128)) >> SHIFT;
+ r = y + uvr;
+ g = y + uvg;
+ b = y + uvb;
+
+ if( r >= RGB_MIN && g >= RGB_MIN && b >= RGB_MIN
+ && r <= RGB_MAX && g <= RGB_MAX && b <= RGB_MAX )
{
- uvr = (V_RED_COEF*(v-128)) >> SHIFT;
- uvg = (U_GREEN_COEF*(u-128) + V_GREEN_COEF*(v-128)) >> SHIFT;
- uvb = (U_BLUE_COEF*(u-128)) >> SHIFT;
- r = y + uvr;
- g = y + uvg;
- b = y + uvb;
-
- if( r >= RGB_MIN && g >= RGB_MIN && b >= RGB_MIN
- && r <= RGB_MAX && g <= RGB_MAX && b <= RGB_MAX )
- {
- /* this one should never happen unless someone fscked up my code */
- if(j == 256) { intf_ErrMsg( "vout error: no colors left to build palette\n" ); break; }
-
- /* clip the colors */
- red[j] = CLIP( r );
- green[j] = CLIP( g );
- blue[j] = CLIP( b );
- transp[j] = 0;
-
- /* allocate color */
- lookup[i] = 1;
- p_vout->yuv.yuv.p_rgb8[i++] = j;
- j++;
- }
- else
- {
- lookup[i] = 0;
- p_vout->yuv.yuv.p_rgb8[i++] = 0;
- }
+ /* this one should never happen unless someone fscked up my code */
+ if(j == 256) { intf_ErrMsg( "vout error: no colors left to build palette\n" ); break; }
+
+ /* clip the colors */
+ red[j] = CLIP( r );
+ green[j] = CLIP( g );
+ blue[j] = CLIP( b );
+ transp[j] = 0;
+
+ /* allocate color */
+ lookup[i] = 1;
+ p_vout->yuv.yuv.p_rgb8[i++] = j;
+ j++;
+ }
+ else
+ {
+ lookup[i] = 0;
+ p_vout->yuv.yuv.p_rgb8[i++] = 0;
}
- i += 128-81;
}
+ i += 128-81;
+ }
- /* the colors have been allocated, we can set the palette */
- /* there will eventually be a way to know which colors
- * couldn't be allocated and try to find a replacement */
- p_vout->p_set_palette( p_vout, red, green, blue, transp );
+ /* the colors have been allocated, we can set the palette */
+ /* there will eventually be a way to know which colors
+ * couldn't be allocated and try to find a replacement */
+ p_vout->p_set_palette( p_vout, red, green, blue, transp );
- p_vout->i_white_pixel = 0xff;
- p_vout->i_black_pixel = 0x00;
- p_vout->i_gray_pixel = 0x44;
- p_vout->i_blue_pixel = 0x3b;
+ p_vout->i_white_pixel = 0xff;
+ p_vout->i_black_pixel = 0x00;
+ p_vout->i_gray_pixel = 0x44;
+ p_vout->i_blue_pixel = 0x3b;
- i = 0;
- /* this loop allocates colors that got outside
- * the RGB cube */
- for ( y = 0; y <= 256; y += 16 )
+ i = 0;
+ /* this loop allocates colors that got outside
+ * the RGB cube */
+ for ( y = 0; y <= 256; y += 16 )
+ {
+ for ( u = 0; u <= 256; u += 32 )
{
- for ( u = 0; u <= 256; u += 32 )
for ( v = 0; v <= 256; v += 32 )
{
int u2, v2;
}
i++;
}
- i += 128-81;
}
-
- break;
- }
- case 2:
- p_vout->yuv.yuv.p_rgb16 = (u16 *)p_vout->yuv.p_base;
- for( i_index = 0; i_index < RED_MARGIN; i_index++ )
- {
- p_vout->yuv.yuv.p_rgb16[RED_OFFSET - RED_MARGIN + i_index] = RGB2PIXEL( p_vout, pi_gamma[0], 0, 0 );
- p_vout->yuv.yuv.p_rgb16[RED_OFFSET + 256 + i_index] = RGB2PIXEL( p_vout, pi_gamma[255], 0, 0 );
+ i += 128-81;
}
- for( i_index = 0; i_index < GREEN_MARGIN; i_index++ )
- {
- p_vout->yuv.yuv.p_rgb16[GREEN_OFFSET - GREEN_MARGIN + i_index] = RGB2PIXEL( p_vout, 0, pi_gamma[0], 0 );
- p_vout->yuv.yuv.p_rgb16[GREEN_OFFSET + 256 + i_index] = RGB2PIXEL( p_vout, 0, pi_gamma[255], 0 );
- }
- for( i_index = 0; i_index < BLUE_MARGIN; i_index++ )
- {
- p_vout->yuv.yuv.p_rgb16[BLUE_OFFSET - BLUE_MARGIN + i_index] = RGB2PIXEL( p_vout, 0, 0, pi_gamma[0] );
- p_vout->yuv.yuv.p_rgb16[BLUE_OFFSET + BLUE_MARGIN + i_index] = RGB2PIXEL( p_vout, 0, 0, pi_gamma[255] );
- }
- for( i_index = 0; i_index < 256; i_index++ )
- {
- p_vout->yuv.yuv.p_rgb16[RED_OFFSET + i_index] = RGB2PIXEL( p_vout, pi_gamma[ i_index ], 0, 0 );
- p_vout->yuv.yuv.p_rgb16[GREEN_OFFSET + i_index] = RGB2PIXEL( p_vout, 0, pi_gamma[ i_index ], 0 );
- p_vout->yuv.yuv.p_rgb16[BLUE_OFFSET + i_index] = RGB2PIXEL( p_vout, 0, 0, pi_gamma[ i_index ] );
- }
- break;
- case 3:
- case 4:
- p_vout->yuv.yuv.p_rgb32 = (u32 *)p_vout->yuv.p_base;
- for( i_index = 0; i_index < RED_MARGIN; i_index++ )
- {
- p_vout->yuv.yuv.p_rgb32[RED_OFFSET - RED_MARGIN + i_index] = RGB2PIXEL( p_vout, pi_gamma[0], 0, 0 );
- p_vout->yuv.yuv.p_rgb32[RED_OFFSET + 256 + i_index] = RGB2PIXEL( p_vout, pi_gamma[255], 0, 0 );
- }
- for( i_index = 0; i_index < GREEN_MARGIN; i_index++ )
- {
- p_vout->yuv.yuv.p_rgb32[GREEN_OFFSET - GREEN_MARGIN + i_index] = RGB2PIXEL( p_vout, 0, pi_gamma[0], 0 );
- p_vout->yuv.yuv.p_rgb32[GREEN_OFFSET + 256 + i_index] = RGB2PIXEL( p_vout, 0, pi_gamma[255], 0 );
- }
- for( i_index = 0; i_index < BLUE_MARGIN; i_index++ )
- {
- p_vout->yuv.yuv.p_rgb32[BLUE_OFFSET - BLUE_MARGIN + i_index] = RGB2PIXEL( p_vout, 0, 0, pi_gamma[0] );
- p_vout->yuv.yuv.p_rgb32[BLUE_OFFSET + BLUE_MARGIN + i_index] = RGB2PIXEL( p_vout, 0, 0, pi_gamma[255] );
- }
- for( i_index = 0; i_index < 256; i_index++ )
- {
- p_vout->yuv.yuv.p_rgb32[RED_OFFSET + i_index] = RGB2PIXEL( p_vout, pi_gamma[ i_index ], 0, 0 );
- p_vout->yuv.yuv.p_rgb32[GREEN_OFFSET + i_index] = RGB2PIXEL( p_vout, 0, pi_gamma[ i_index ], 0 );
- p_vout->yuv.yuv.p_rgb32[BLUE_OFFSET + i_index] = RGB2PIXEL( p_vout, 0, 0, pi_gamma[ i_index ] );
- }
- break;
}
}
static __inline__ void input_DemuxPES( input_thread_t *p_input,
ts_packet_t *ts_packet,
es_descriptor_t *p_es_descriptor,
- boolean_t b_unit_start, boolean_t b_packet_lost );
+ boolean_t b_unit_start,
+ boolean_t b_packet_lost );
static __inline__ void input_ParsePES( input_thread_t *p_input,
es_descriptor_t *p_es_descriptor );
static __inline__ void input_DemuxPSI( input_thread_t *p_input,
ts_packet_t *ts_packet,
es_descriptor_t *p_es_descriptor,
- boolean_t b_unit_start, boolean_t b_packet_lost );
+ boolean_t b_unit_start,
+ boolean_t b_packet_lost );
/*****************************************************************************
* input_CreateThread: creates a new input thread
* If pi_status is NULL, then the function will block until the thread is ready.
* If not, it will be updated using one of the THREAD_* constants.
*****************************************************************************/
-input_thread_t *input_CreateThread ( int i_method, void *p_source, int i_port, int i_vlan,
- p_vout_thread_t p_vout, p_aout_thread_t p_aout, int *pi_status )
+input_thread_t *input_CreateThread ( int i_method, void *p_source, int i_port,
+ int i_vlan, p_vout_thread_t p_vout,
+ p_aout_thread_t p_aout, int *pi_status )
{
input_thread_t * p_input; /* thread descriptor */
int i_status; /* thread status */
}
/*****************************************************************************
- * RunThread: main thread loop
+ * input_DemuxPSI:
*****************************************************************************
- * Thread in charge of processing the network packets and demultiplexing.
+ * Notice that current ES state has been locked by input_SortPacket.
+ * (No more true, changed by benny - FIXME: See if it's ok, and definitely
+ * change the code ?? )
*****************************************************************************/
-static void RunThread( input_thread_t *p_input )
+static __inline__ void input_DemuxPSI( input_thread_t *p_input,
+ ts_packet_t *p_ts_packet,
+ es_descriptor_t *p_es_descriptor,
+ boolean_t b_unit_start,
+ boolean_t b_packet_lost )
{
- /*
- * Initialize thread and free configuration
- */
- p_input->b_error = InitThread( p_input );
- if( p_input->b_error )
+ int i_data_offset; /* Offset of the interesting data in the TS packet */
+ u16 i_data_length; /* Length of those data */
+ //boolean_t b_first_section; /* another section in the TS packet ? */
+
+ ASSERT(p_input);
+ ASSERT(p_ts_packet);
+ ASSERT(p_es_descriptor);
+
+#define p_psi (p_es_descriptor->p_psi_section)
+
+ //intf_DbgMsg( "input debug: PSI demultiplexing %p (%p)\n", p_ts_packet, p_input);
+
+ //intf_DbgMsg( "Packet: %x %x %x %x %x %x %x %x %x %x %x %x %x %x %x %x %x %x %x %x %x (unit start: %d)\n", p_ts_packet->buffer[p_ts_packet->i_payload_start], p_ts_packet->buffer[p_ts_packet->i_payload_start+1], p_ts_packet->buffer[p_ts_packet->i_payload_start+2], p_ts_packet->buffer[p_ts_packet->i_payload_start+3], p_ts_packet->buffer[p_ts_packet->i_payload_start+4], p_ts_packet->buffer[p_ts_packet->i_payload_start+5], p_ts_packet->buffer[p_ts_packet->i_payload_start+6], p_ts_packet->buffer[p_ts_packet->i_payload_start+7], p_ts_packet->buffer[p_ts_packet->i_payload_start+8], p_ts_packet->buffer[p_ts_packet->i_payload_start+9], p_ts_packet->buffer[p_ts_packet->i_payload_start+10], p_ts_packet->buffer[p_ts_packet->i_payload_start+11], p_ts_packet->buffer[p_ts_packet->i_payload_start+12], p_ts_packet->buffer[p_ts_packet->i_payload_start+13], p_ts_packet->buffer[p_ts_packet->i_payload_start+14], p_ts_packet->buffer[p_ts_packet->i_payload_start+15], p_ts_packet->buffer[p_ts_packet->i_payload_start+16], p_ts_packet->buffer[p_ts_packet->i_payload_start+17], p_ts_packet->buffer[p_ts_packet->i_payload_start+18], p_ts_packet->buffer[p_ts_packet->i_payload_start+19], p_ts_packet->buffer[p_ts_packet->i_payload_start+20], b_unit_start);
+
+
+ /* Try to find the beginning of the payload in the packet to initialise
+ * the do-while loop that follows -> Compute the i_data_offset variable:
+ * by default, the value is set so that we won't enter in the while loop.
+ * It will be set to a correct value if the data are not corrupted */
+ i_data_offset = TS_PACKET_SIZE;
+
+ /* Has the reassembly of a section already begun in a previous packet ? */
+ if( p_psi->b_running_section )
{
- free( p_input ); /* destroy descriptor */
- return;
+ /* Was data lost since the last TS packet ? */
+ if( b_packet_lost )
+ {
+ /* Discard the packet and wait for the begining of a new one
+ * to resynch */
+ p_psi->b_running_section = 0;
+ p_psi->i_current_position = 0;
+ intf_DbgMsg( "PSI section(s) discarded due to packet loss\n" );
+ }
+ else
+ {
+ /* The data that complete a previously began section are always at
+ * the beginning of the TS payload... */
+ i_data_offset = p_ts_packet->i_payload_start;
+ /* ...Unless there is a pointer field, that we have to bypass */
+ if( b_unit_start )
+ i_data_offset++;
+ //intf_DbgMsg( "New part of the section received at offset %d\n", i_data_offset );
+ }
}
-
- /*
- * Main loop
- */
- intf_DbgMsg("\n");
- while( !p_input->b_die && !p_input->b_error )
+ /* We are looking for the beginning of a new section */
+ else
{
- /* Scatter read the UDP packet from the network or the file. */
- if( (input_ReadPacket( p_input )) == (-1) )
+ if( b_unit_start )
{
- /* FIXME??: Normally, a thread can't kill itself, but we don't have
- * any method in case of an error condition ... */
- p_input->b_error = 1;
+ /* Get the offset at which the data for that section can be found
+ * The offset is stored in the pointer_field since we are
+ * interested in the first section of the TS packet. Note that
+ * the +1 is to bypass the pointer field */
+ i_data_offset = p_ts_packet->i_payload_start +
+ p_ts_packet->buffer[p_ts_packet->i_payload_start] + 1;
+ //intf_DbgMsg( "New section beginning at offset %d in TS packet\n", i_data_offset );
+ }
+ else
+ {
+ /* This may either mean that the TS is bad or that the packet
+ * contains the end of a section that had been discarded in a
+ * previous loop: trash the TS packet since we cannot do
+ * anything with those data: */
+ p_psi->b_running_section = 0;
+ p_psi->i_current_position = 0;
+ intf_DbgMsg( "PSI packet discarded due to lack of synchronisation\n" );
}
-
-#ifdef STATS
- p_input->c_loops++;
-#endif
}
- /*
- * Error loop
- */
- if( p_input->b_error )
+ /* The section we will deal with during the first iteration of the
+ * following loop is the first one contained in the TS packet */
+ // b_first_section = 1;
+
+ /* Reassemble the pieces of sections contained in the TS packet and
+ * decode the sections that could have been completed.
+ * Stop when we reach the end of the packet or stuffing bytes */
+ while( i_data_offset < TS_PACKET_SIZE && p_ts_packet->buffer[i_data_offset] != 0xFF )
{
- ErrorThread( p_input );
- }
+ /* If the current section is a new one, reinit the data fields of
+ * the p_psi struct to start its decoding */
+ if( !p_psi->b_running_section )
+ {
+ /* Read the length of the new section */
+ p_psi->i_length = (U16_AT(&p_ts_packet->buffer[i_data_offset+1]) & 0xFFF) + 3;
+ //intf_DbgMsg( "Section length %d\n", p_psi->i_length );
+ if( p_psi->i_length > PSI_SECTION_SIZE )
+ {
+ /* The TS packet is corrupted, stop here to avoid possible
+ * a seg fault */
+ intf_DbgMsg( "PSI Section size is too big, aborting its reception\n" );
+ break;
+ }
- /* End of thread */
- EndThread( p_input );
- intf_DbgMsg("thread end\n");
-}
+ /* Init the reassembly of that section */
+ p_psi->b_running_section = 1;
+ p_psi->i_current_position = 0;
+ }
+ /* Compute the length of data related to the section in this TS packet */
+ if( p_psi->i_length - p_psi->i_current_position > TS_PACKET_SIZE - i_data_offset)
+ i_data_length = TS_PACKET_SIZE - i_data_offset;
+ else
+ i_data_length = p_psi->i_length - p_psi->i_current_position;
-/*****************************************************************************
- * ErrorThread: RunThread() error loop
- *****************************************************************************
- * This function is called when an error occured during thread main's loop.
- *****************************************************************************/
-static void ErrorThread( input_thread_t *p_input )
-{
- /* Wait until a `die' order */
- intf_DbgMsg("\n");
- while( !p_input->b_die )
- {
- /* Sleep a while */
- msleep( VOUT_IDLE_SLEEP );
- }
-}
+ /* Copy those data in the section buffer */
+ memcpy( &p_psi->buffer[p_psi->i_current_position], &p_ts_packet->buffer[i_data_offset],
+ i_data_length );
-/*****************************************************************************
- * EndThread: end the input thread
- *****************************************************************************/
-static void EndThread( input_thread_t * p_input )
-{
- int * pi_status; /* threas status */
- int i_es_loop; /* es index */
+ /* Interesting data are now after the ones we copied, since no gap is
+ * allowed between 2 sections in a TS packets */
+ i_data_offset += i_data_length;
- /* Store status */
- intf_DbgMsg("\n");
- pi_status = p_input->pi_status;
- *pi_status = THREAD_END;
+ /* Decode the packet if it is now complete */
+ if (p_psi->i_length == p_psi->i_current_position + i_data_length)
+ {
+ /* Packet is complete, decode it */
+ //intf_DbgMsg( "SECTION COMPLETE: starting decoding of its data\n" );
+ input_PsiDecode( p_input, p_psi );
- /* Close input method */
- p_input->p_Close( p_input );
+ /* Prepare the buffer to receive a new section */
+ p_psi->i_current_position = 0;
+ p_psi->b_running_section = 0;
- /* Destroy all decoder threads */
- for( i_es_loop = 0;
- (i_es_loop < INPUT_MAX_ES) && (p_input->pp_selected_es[i_es_loop] != NULL) ;
- i_es_loop++ )
- {
- switch( p_input->pp_selected_es[i_es_loop]->i_type )
+ /* The new section won't be the first anymore */
+ //b_first_section = 0;
+ }
+ else
{
- case MPEG1_VIDEO_ES:
- case MPEG2_VIDEO_ES:
- vpar_DestroyThread( (vpar_thread_t*)(p_input->pp_selected_es[i_es_loop]->p_dec) /*, NULL */ );
- break;
- case MPEG1_AUDIO_ES:
- case MPEG2_AUDIO_ES:
- adec_DestroyThread( (adec_thread_t*)(p_input->pp_selected_es[i_es_loop]->p_dec) );
- break;
- case AC3_AUDIO_ES:
- ac3dec_DestroyThread( (ac3dec_thread_t *)(p_input->pp_selected_es[i_es_loop]->p_dec) );
- break;
- case LPCM_AUDIO_ES:
- lpcmdec_DestroyThread((lpcmdec_thread_t *)(p_input->pp_selected_es[i_es_loop]->p_dec) );
- break;
- case DVD_SPU_ES:
- spudec_DestroyThread( (spudec_thread_t *)(p_input->pp_selected_es[i_es_loop]->p_dec) );
- break;
- case 0:
- /* Special streams for the PSI decoder, PID 0 and 1 */
- break;
-#ifdef DEBUG
- default:
- intf_DbgMsg("error: unknown decoder type %d\n", p_input->pp_selected_es[i_es_loop]->i_type );
- break;
-#endif
+ /* Prepare the buffer to receive the next part of the section */
+ p_psi->i_current_position += i_data_length;
+ //intf_DbgMsg( "Section not complete, waiting for the end\n" );
}
+
+ //intf_DbgMsg( "Must loop ? Next data offset: %d, stuffing: %d\n",
+ // i_data_offset, p_ts_packet->buffer[i_data_offset] );
}
- input_NetlistEnd( p_input ); /* clean netlist */
- input_PsiEnd( p_input ); /* clean PSI information */
- input_PcrEnd( p_input ); /* clean PCR information */
- free( p_input ); /* free input_thread structure */
+ /* Relase the TS packet, we don't need it anymore */
+ input_NetlistFreeTS( p_input, p_ts_packet );
- /* Update status */
- *pi_status = THREAD_OVER;
+#undef p_psi
}
/*****************************************************************************
- * input_ReadPacket: reads a packet from the network or the file
+ * input_ParsePES
+ *****************************************************************************
+ * Parse a finished PES packet and analyze its header.
*****************************************************************************/
-static __inline__ int input_ReadPacket( input_thread_t *p_input )
+static __inline__ void input_ParsePES( input_thread_t *p_input,
+ es_descriptor_t *p_es_descriptor )
{
- int i_base_index; /* index of the first free iovec */
- int i_current_index;
- int i_packet_size;
-#ifdef INPUT_LIFO_TS_NETLIST
- int i_meanwhile_released;
- int i_currently_removed;
-#endif
- ts_packet_t * p_ts_packet;
+ decoder_fifo_t * p_fifo;
+ u8 i_pes_header_size;
+ ts_packet_t * p_ts;
+ int i_ts_payload_size;
- /* In this function, we only care about the TS netlist. PES netlist
- * is for the demultiplexer. */
-#ifdef INPUT_LIFO_TS_NETLIST
- i_base_index = p_input->netlist.i_ts_index;
- /* Verify that we still have packets in the TS netlist */
- if( (INPUT_MAX_TS + INPUT_TS_READ_ONCE - 1 - p_input->netlist.i_ts_index) <= INPUT_TS_READ_ONCE )
- {
- intf_ErrMsg("input error: TS netlist is empty !\n");
- return( -1 );
- }
-
-#else /* FIFO netlist */
- i_base_index = p_input->netlist.i_ts_start;
- if( p_input->netlist.i_ts_start + INPUT_TS_READ_ONCE -1 > INPUT_MAX_TS )
- {
- /* The netlist is splitted in 2 parts. We must gather them to consolidate
- the FIFO (we make the loop easily in having the same iovec at the far
- end and in the beginning of netlist_free).
- That's why the netlist is (INPUT_MAX_TS +1) + (INPUT_TS_READ_ONCE -1)
- large. */
- memcpy( p_input->netlist.p_ts_free + INPUT_MAX_TS + 1,
- p_input->netlist.p_ts_free,
- (p_input->netlist.i_ts_start + INPUT_TS_READ_ONCE - 1 - INPUT_MAX_TS)
- * sizeof(struct iovec) );
- }
-
- /* Verify that we still have packets in the TS netlist */
- if( ((p_input->netlist.i_ts_end -1 - p_input->netlist.i_ts_start) & INPUT_MAX_TS) <= INPUT_TS_READ_ONCE )
- {
- intf_ErrMsg("input error: TS netlist is empty !\n");
- return( -1 );
- }
-#endif /* FIFO netlist */
-
- /* Scatter read the buffer. */
- i_packet_size = (*p_input->p_Read)( p_input,
- &p_input->netlist.p_ts_free[i_base_index],
- INPUT_TS_READ_ONCE );
- if( i_packet_size == (-1) )
- {
-#if 0
- intf_DbgMsg("Read packet %d %p %d %d\n", i_base_index,
- &p_input->netlist.p_ts_free[i_base_index],
- p_input->netlist.i_ts_start,
- p_input->netlist.i_ts_end);
-#endif
- intf_ErrMsg("input error: readv() failed (%s)\n", strerror(errno));
- return( -1 );
- }
-
- if( i_packet_size == 0 )
- {
- /* No packet has been received, so stop here. */
- return( 0 );
- }
-
- /* Demultiplex the TS packets (1..INPUT_TS_READ_ONCE) received. */
- for( i_current_index = i_base_index;
- (i_packet_size -= TS_PACKET_SIZE) >= 0;
- i_current_index++ )
- {
- /* BTW, something REALLY bad could happen if we receive packets with
- a wrong size. */
- p_ts_packet = (ts_packet_t*)(p_input->netlist.p_ts_free[i_current_index].iov_base);
- /* Don't cry :-), we are allowed to do that cast, because initially,
- our buffer was malloc'ed with sizeof(ts_packet_t) */
-
- /* Find out if we need this packet and demultiplex. */
- input_SortPacket( p_input /* for current PIDs and netlist */,
- p_ts_packet);
- }
-
- if( i_packet_size > 0 )
- {
- intf_ErrMsg("input error: wrong size\n");
- return( -1 );
- }
+#define p_pes (p_es_descriptor->p_pes_packet)
- /* Remove the TS packets we have just filled from the netlist */
-#ifdef INPUT_LIFO_TS_NETLIST
- /* We need to take a lock here while we're calculating index positions. */
- vlc_mutex_lock( &p_input->netlist.lock );
+ //intf_DbgMsg("End of PES packet %p\n", p_pes);
- i_meanwhile_released = i_base_index - p_input->netlist.i_ts_index;
- if( i_meanwhile_released )
+ /* First read the 6 header bytes common to all PES packets:
+ use them to test the PES validity */
+ if( (p_pes->p_pes_header[0] || p_pes->p_pes_header[1] ||
+ (p_pes->p_pes_header[2] != 1)) ||
+ /* packet_start_code_prefix != 0x000001 */
+ ((p_pes->i_pes_real_size) &&
+ (p_pes->i_pes_real_size != p_pes->i_pes_size)) )
+ /* PES_packet_length is set and != total received payload */
{
- /* That's where it becomes funny :-). Since we didn't take locks for
- efficiency reasons, other threads (including ourselves, with
- input_DemuxPacket) might have released packets to the netlist.
- So we have to copy these iovec where they should go.
-
- BTW, that explains why the TS netlist is
- (INPUT_MAX_TS +1) + (TS_READ_ONCE -1) large. */
-
- i_currently_removed = i_current_index - i_base_index;
- if( i_meanwhile_released < i_currently_removed )
- {
- /* Copy all iovecs in that case */
- memcpy( &p_input->netlist.p_ts_free[p_input->netlist.i_ts_index]
- + i_currently_removed,
- &p_input->netlist.p_ts_free[p_input->netlist.i_ts_index],
- i_meanwhile_released * sizeof(struct iovec) );
- }
- else
- {
- /* We have fewer places than items, so we only move
- i_currently_removed of them. */
- memcpy( &p_input->netlist.p_ts_free[i_base_index],
- &p_input->netlist.p_ts_free[p_input->netlist.i_ts_index],
- i_currently_removed * sizeof(struct iovec) );
- }
-
- /* Update i_netlist_index with the information gathered above. */
- p_input->netlist.i_ts_index += i_currently_removed;
+ /* Trash the packet and set p_pes to NULL to be sure the next PES
+ packet will have its b_data_lost flag set */
+ intf_DbgMsg("Corrupted PES packet (size doesn't match) : trashed\n");
+ input_NetlistFreePES( p_input, p_pes );
+ p_pes = NULL;
+ /* Stats XXX?? */
}
else
{
- /* Nothing happened. */
- p_input->netlist.i_ts_index = i_current_index;
- }
-
- vlc_mutex_unlock( &p_input->netlist.lock );
+ /* The PES packet is valid. Check its type to test if it may
+ carry additional informations in a header extension */
+ p_pes->i_stream_id = p_pes->p_pes_header[3];
-#else /* FIFO netlist */
- /* & is modulo ; that's where we make the loop. */
- p_input->netlist.i_ts_start = i_current_index & INPUT_MAX_TS;
-#endif
+ switch( p_pes->i_stream_id )
+ {
+ case 0xBE: /* Padding */
+ case 0xBC: /* Program stream map */
+ case 0xBF: /* Private stream 2 */
+ case 0xB0: /* ECM */
+ case 0xB1: /* EMM */
+ case 0xFF: /* Program stream directory */
+ case 0xF2: /* DSMCC stream */
+ case 0xF8: /* ITU-T H.222.1 type E stream */
+ /* The payload begins immediatly after the 6 bytes header, so
+ we have finished with the parsing */
+ i_pes_header_size = 6;
+ break;
-#ifdef STATS
- p_input->c_packets_read += i_current_index - i_base_index;
- p_input->c_bytes += (i_current_index - i_base_index) * TS_PACKET_SIZE;
-#endif
- return( 0 );
-}
+ default:
+ switch( p_pes->p_pes_header[8] & 0xc0 )
+ {
+ case 0x80: /* MPEG2: 10xx xxxx */
+ case 0x00: /* FIXME: This shouldn't be allowed !! */
+ /* The PES header contains at least 3 more bytes: parse them */
+ p_pes->b_data_alignment = p_pes->p_pes_header[6] & 0x04;
+ p_pes->b_has_pts = p_pes->p_pes_header[7] & 0x80;
+ i_pes_header_size = p_pes->p_pes_header[8] + 9;
-/*****************************************************************************
- * input_SortPacket: find out whether we need that packet
- *****************************************************************************/
-static __inline__ void input_SortPacket( input_thread_t *p_input,
- ts_packet_t *p_ts_packet )
-{
- int i_current_pid;
- int i_es_loop;
+ /* Now parse the optional header extensions (in the limit of
+ the 14 bytes */
+ if( p_pes->b_has_pts )
+ {
+ pcr_descriptor_t * p_pcr;
- /* Verify that sync_byte, error_indicator and scrambling_control are
- what we expected. */
- if( !(p_ts_packet->buffer[0] == 0x47) || (p_ts_packet->buffer[1] & 0x80) ||
- (p_ts_packet->buffer[3] & 0xc0) )
- {
- intf_DbgMsg("input debug: invalid TS header (%p)\n", p_ts_packet);
- }
- else
- {
- /* Get the PID of the packet. Note that ntohs is needed, for endianness
- purposes (see man page). */
- i_current_pid = U16_AT(&p_ts_packet->buffer[1]) & 0x1fff;
+ p_pcr = p_input->p_pcr;
- //intf_DbgMsg("input debug: pid %d received (%p)\n",
- // i_current_pid, p_ts_packet);
+ p_pes->i_pts =
+ ( ((mtime_t)(p_pes->p_pes_header[9] & 0x0E) << 29) |
+ (((mtime_t)U16_AT(p_pes->p_pes_header + 10) << 14) - (1 << 14)) |
+ ((mtime_t)U16_AT(p_pes->p_pes_header + 12) >> 1) ) * 300;
+ p_pes->i_pts /= 27;
- /* Lock current ES state. */
- vlc_mutex_lock( &p_input->es_lock );
+ if( p_pcr->i_synchro_state )
+ {
+ switch( p_pcr->i_synchro_state )
+ {
+ case SYNCHRO_NOT_STARTED:
+ p_pes->b_has_pts = 0;
+ break;
- /* Verify that we actually want this PID. */
- for( i_es_loop = 0; i_es_loop < INPUT_MAX_SELECTED_ES; i_es_loop++ )
- {
- if( p_input->pp_selected_es[i_es_loop] != NULL)
- {
- if( (*p_input->pp_selected_es[i_es_loop]).i_id
- == i_current_pid )
- {
- /* Don't need the lock anymore, since the value pointed
- out by p_input->pp_selected_es[i_es_loop] can only be
- modified from inside the input_thread (by the PSI
- decoder): interface thread is only allowed to modify
- the pp_selected_es table */
- vlc_mutex_unlock( &p_input->es_lock );
+ case SYNCHRO_START:
+ p_pes->i_pts += p_pcr->delta_pcr;
+ p_pcr->delta_absolute = mdate() - p_pes->i_pts + INPUT_PTS_DELAY;
+ p_pes->i_pts += p_pcr->delta_absolute;
+ p_pcr->i_synchro_state = 0;
+ break;
- /* We're interested. Pass it to the demultiplexer. */
- input_DemuxTS( p_input, p_ts_packet,
- p_input->pp_selected_es[i_es_loop] );
- return;
+ case SYNCHRO_REINIT: /* We skip a PES */
+ p_pes->b_has_pts = 0;
+ p_pcr->i_synchro_state = SYNCHRO_START;
+ break;
+ }
+ }
+ else
+ {
+ p_pes->i_pts += p_pcr->delta_pcr + p_pcr->delta_absolute;
+ }
}
- }
- else
- {
- /* pp_selected_es should not contain any hole. */
break;
- }
- }
- vlc_mutex_unlock( &p_input->es_lock );
- }
-
- /* We weren't interested in receiving this packet. Give it back to the
- netlist. */
- //intf_DbgMsg("SortPacket: freeing unwanted TS %p (pid %d)\n", p_ts_packet,
- // U16_AT(&p_ts_packet->buffer[1]) & 0x1fff);
- input_NetlistFreeTS( p_input, p_ts_packet );
-#ifdef STATS
- p_input->c_packets_trashed++;
-#endif
-}
-/*****************************************************************************
- * input_DemuxTS: first step of demultiplexing: the TS header
- *****************************************************************************
- * Stream must also only contain PES and PSI, so PID must have been filtered
- *****************************************************************************/
-static __inline__ void input_DemuxTS( input_thread_t *p_input,
- ts_packet_t *p_ts_packet,
- es_descriptor_t *p_es_descriptor )
-{
- int i_dummy;
- boolean_t b_adaption; /* Adaption field is present */
- boolean_t b_payload; /* Packet carries payload */
- boolean_t b_unit_start; /* A PSI or a PES start in the packet */
- boolean_t b_trash = 0; /* Must the packet be trashed ? */
- boolean_t b_lost = 0; /* Was there a packet lost ? */
-
- ASSERT(p_input);
- ASSERT(p_ts_packet);
- ASSERT(p_es_descriptor);
-
-#define p (p_ts_packet->buffer)
-
- //intf_DbgMsg("input debug: TS-demultiplexing packet %p, pid %d, number %d\n",
- // p_ts_packet, U16_AT(&p[1]) & 0x1fff, p[3] & 0x0f);
+ default: /* MPEG1 or some strange thing */
+ /* since this isn't supported yet, we certainly gonna crash */
+ intf_ErrMsg( "FIXME: unknown PES type %.2x\n",
+ p_pes->p_pes_header[8] );
+ i_pes_header_size = 6;
+ break;
-#ifdef STATS
- p_es_descriptor->c_packets++;
- p_es_descriptor->c_bytes += TS_PACKET_SIZE;
-#endif
+ }
+ break;
+ }
- /* Extract flags values from TS common header. */
- b_unit_start = (p[1] & 0x40);
- b_adaption = (p[3] & 0x20);
- b_payload = (p[3] & 0x10);
+ /* Now we've parsed the header, we just have to indicate in some
+ * specific TS packets where the PES payload begins (renumber
+ * i_payload_start), so that the decoders can find the beginning
+ * of their data right out of the box. */
+ p_ts = p_pes->p_first_ts;
+ i_ts_payload_size = p_ts->i_payload_end - p_ts->i_payload_start;
+ while( i_pes_header_size > i_ts_payload_size )
+ {
+ /* These packets are entirely filled by the PES header. */
+ i_pes_header_size -= i_ts_payload_size;
+ p_ts->i_payload_start = p_ts->i_payload_end;
+ /* Go to the next TS packet: here we won't have to test it is
+ * not NULL because we trash the PES packets when packet lost
+ * occurs */
+ p_ts = p_ts->p_next_ts;
+ i_ts_payload_size = p_ts->i_payload_end - p_ts->i_payload_start;
+ }
+ /* This last packet is partly header, partly payload. */
+ p_ts->i_payload_start += i_pes_header_size;
- /* Extract adaption field informations if any */
- if( !b_adaption )
- {
- /* We don't have any adaptation_field, so payload start immediately
- after the 4 byte TS header */
- p_ts_packet->i_payload_start = 4;
- }
- else
- {
- /* p[4] is adaptation_field_length minus one */
- p_ts_packet->i_payload_start = 5 + p[4];
- /* The adaption field can be limited to the adaptation_field_length byte,
- so that there is nothing to do: skip this possibility */
- if( p[4] )
+ /* Now we can eventually put the PES packet in the decoder's
+ * PES fifo */
+ switch( p_es_descriptor->i_type )
{
- /* If the packet has both adaptation_field and payload, adaptation_field
- cannot be more than 182 bytes long; if there is only an
- adaptation_field, it must fill the next 183 bytes. */
- if( b_payload ? (p[4] > 182) : (p[4] != 183) )
- {
- intf_DbgMsg("input debug: invalid TS adaptation field (%p)\n",
- p_ts_packet);
-#ifdef STATS
- p_es_descriptor->c_invalid_packets++;
-#endif
- b_trash = 1;
- }
+ case MPEG1_VIDEO_ES:
+ case MPEG2_VIDEO_ES:
+ p_fifo = &(((vpar_thread_t*)(p_es_descriptor->p_dec))->fifo);
+ break;
- /* No we are sure that the byte containing flags is present: read it */
- else
- {
- /* discontinuity_indicator */
- if( p[5] & 0x80 )
- {
- intf_DbgMsg("discontinuity_indicator encountered by TS demux " \
- "(position read: %d, saved: %d)\n", p[5] & 0x80,
- p_es_descriptor->i_continuity_counter);
+ case MPEG1_AUDIO_ES:
+ case MPEG2_AUDIO_ES:
+ p_fifo = &(((adec_thread_t*)(p_es_descriptor->p_dec))->fifo);
+ break;
- /* If the PID carries the PCR, there will be a system time-base
- discontinuity. We let the PCR decoder handle that. */
- p_es_descriptor->b_discontinuity = 1;
+ case AC3_AUDIO_ES:
+ p_fifo = &(((ac3dec_thread_t *)(p_es_descriptor->p_dec))->fifo);
+ break;
- /* There also may be a continuity_counter discontinuity:
- resynchronise our counter with the one of the stream */
- p_es_descriptor->i_continuity_counter = (p[3] & 0x0f) - 1;
- }
+ case LPCM_AUDIO_ES:
+ p_fifo = &(((lpcmdec_thread_t *)(p_es_descriptor->p_dec))->fifo);
+ break;
- /* random_access_indicator */
- p_es_descriptor->b_random |= p[5] & 0x40;
+ case DVD_SPU_ES:
+ /* we skip the first byte at the beginning of the
+ * subpicture payload, it only contains the SPU ID. */
+ p_ts->i_payload_start++;
+ p_fifo = &(((spudec_thread_t *)(p_es_descriptor->p_dec))->fifo);
+ break;
- /* If this is a PCR_PID, and this TS packet contains a PCR,
- we pass it along to the PCR decoder. */
- if( (p_es_descriptor->b_pcr) && (p[5] & 0x10) )
- {
- /* There should be a PCR field in the packet, check if the
- adaption field is long enough to carry it */
- if( p[4] >= 7 )
- {
- /* Call the PCR decoder */
- input_PcrDecode( p_input, p_es_descriptor, &p[6] );
- }
- }
- }
+ default:
+ /* This should never happen */
+ intf_DbgMsg("Unknown stream type (%d, %d): PES trashed\n",
+ p_es_descriptor->i_id, p_es_descriptor->i_type);
+ p_fifo = NULL;
+ break;
}
- }
- /* Check the continuity of the stream. */
- i_dummy = ((p[3] & 0x0f) - p_es_descriptor->i_continuity_counter) & 0x0f;
- if( i_dummy == 1 )
- {
- /* Everything is ok, just increase our counter */
- p_es_descriptor->i_continuity_counter++;
- }
- else
- {
- if( !b_payload && i_dummy == 0 )
- {
- /* This is a packet without payload, this is allowed by the draft
- As there is nothing interesting in this packet (except PCR that
- have already been handled), we can trash the packet. */
- intf_DbgMsg("Packet without payload received by TS demux\n");
- b_trash = 1;
- }
- else if( i_dummy <= 0 )
- {
- /* Duplicate packet: mark it as being to be trashed. */
- intf_DbgMsg("Duplicate packet received by TS demux\n");
- b_trash = 1;
- }
- else if( p_es_descriptor->i_continuity_counter == 0xFF )
- {
- /* This means that the packet is the first one we receive for this
- ES since the continuity counter ranges between 0 and 0x0F
- excepts when it has been initialized by the input: Init the
- counter to the correct value. */
- intf_DbgMsg("First packet for PID %d received by TS demux\n",
- p_es_descriptor->i_id);
- p_es_descriptor->i_continuity_counter = (p[3] & 0x0f);
- }
- else
+ if( p_fifo != NULL )
{
- /* This can indicate that we missed a packet or that the
- continuity_counter wrapped and we received a dup packet: as we
- don't know, do as if we missed a packet to be sure to recover
- from this situation */
- intf_DbgMsg("Packet lost by TS demux: current %d, packet %d\n",
- p_es_descriptor->i_continuity_counter & 0x0f,
- p[3] & 0x0f);
- b_lost = 1;
- p_es_descriptor->i_continuity_counter = p[3] & 0x0f;
- }
- }
-
- /* Trash the packet if it has no payload or if it is bad */
- if( b_trash )
- {
- input_NetlistFreeTS( p_input, p_ts_packet );
+ vlc_mutex_lock( &p_fifo->data_lock );
+ if( DECODER_FIFO_ISFULL( *p_fifo ) )
+ {
+ /* The FIFO is full !!! This should not happen. */
#ifdef STATS
- p_input->c_packets_trashed++;
+ p_input->c_packets_trashed += p_pes->i_ts_packets;
+ p_es_descriptor->c_invalid_packets += p_pes->i_ts_packets;
#endif
- }
- else
- {
- if( p_es_descriptor->b_psi )
- {
- /* The payload contains PSI tables */
- input_DemuxPSI( p_input, p_ts_packet, p_es_descriptor,
- b_unit_start, b_lost );
+ input_NetlistFreePES( p_input, p_pes );
+ intf_DbgMsg("PES trashed - fifo full ! (%d, %d)\n",
+ p_es_descriptor->i_id, p_es_descriptor->i_type);
+ }
+ else
+ {
+ //intf_DbgMsg("Putting %p into fifo %p/%d\n",
+ // p_pes, p_fifo, p_fifo->i_end);
+ p_fifo->buffer[p_fifo->i_end] = p_pes;
+ DECODER_FIFO_INCEND( *p_fifo );
+
+ /* Warn the decoder that it's got work to do. */
+ vlc_cond_signal( &p_fifo->data_wait );
+ }
+ vlc_mutex_unlock( &p_fifo->data_lock );
}
else
{
- /* The payload carries a PES stream */
- input_DemuxPES( p_input, p_ts_packet, p_es_descriptor,
- b_unit_start, b_lost );
+ intf_DbgMsg("No fifo to receive PES %p: trash\n", p_pes);
+#ifdef STATS
+ p_input->c_packets_trashed += p_pes->i_ts_packets;
+ p_es_descriptor->c_invalid_packets += p_pes->i_ts_packets;
+#endif
+ input_NetlistFreePES( p_input, p_pes );
}
}
-
-#undef p
+#undef p_pes
}
-
-
-
/*****************************************************************************
* input_DemuxPES:
*****************************************************************************
i_dummy = 0;
do
{
- memcpy(p_pes->p_pes_header_save + i_dummy,
- &p_ts->buffer[p_ts->i_payload_start], i_ts_payload_size);
+ memcpy( p_pes->p_pes_header_save + i_dummy,
+ &p_ts->buffer[p_ts->i_payload_start],
+ i_ts_payload_size);
i_dummy += i_ts_payload_size;
p_ts = p_ts->p_next_ts;
#undef p_pes
}
-
-
/*****************************************************************************
- * input_ParsePES
+ * input_DemuxTS: first step of demultiplexing: the TS header
*****************************************************************************
- * Parse a finished PES packet and analyze its header.
+ * Stream must also only contain PES and PSI, so PID must have been filtered
*****************************************************************************/
-static __inline__ void input_ParsePES( input_thread_t *p_input,
- es_descriptor_t *p_es_descriptor )
+static __inline__ void input_DemuxTS( input_thread_t *p_input,
+ ts_packet_t *p_ts_packet,
+ es_descriptor_t *p_es_descriptor )
{
- decoder_fifo_t * p_fifo;
- u8 i_pes_header_size;
- ts_packet_t * p_ts;
- int i_ts_payload_size;
+ int i_dummy;
+ boolean_t b_adaption; /* Adaption field is present */
+ boolean_t b_payload; /* Packet carries payload */
+ boolean_t b_unit_start; /* A PSI or a PES start in the packet */
+ boolean_t b_trash = 0; /* Must the packet be trashed ? */
+ boolean_t b_lost = 0; /* Was there a packet lost ? */
+
+ ASSERT(p_input);
+ ASSERT(p_ts_packet);
+ ASSERT(p_es_descriptor);
+#define p (p_ts_packet->buffer)
-#define p_pes (p_es_descriptor->p_pes_packet)
+ //intf_DbgMsg("input debug: TS-demultiplexing packet %p, pid %d, number %d\n",
+ // p_ts_packet, U16_AT(&p[1]) & 0x1fff, p[3] & 0x0f);
- //intf_DbgMsg("End of PES packet %p\n", p_pes);
+#ifdef STATS
+ p_es_descriptor->c_packets++;
+ p_es_descriptor->c_bytes += TS_PACKET_SIZE;
+#endif
- /* First read the 6 header bytes common to all PES packets:
- use them to test the PES validity */
- if( (p_pes->p_pes_header[0] || p_pes->p_pes_header[1] ||
- (p_pes->p_pes_header[2] != 1)) ||
- /* packet_start_code_prefix != 0x000001 */
- ((p_pes->i_pes_real_size) &&
- (p_pes->i_pes_real_size != p_pes->i_pes_size)) )
- /* PES_packet_length is set and != total received payload */
+ /* Extract flags values from TS common header. */
+ b_unit_start = (p[1] & 0x40);
+ b_adaption = (p[3] & 0x20);
+ b_payload = (p[3] & 0x10);
+
+ /* Extract adaption field informations if any */
+ if( !b_adaption )
{
- /* Trash the packet and set p_pes to NULL to be sure the next PES
- packet will have its b_data_lost flag set */
- intf_DbgMsg("Corrupted PES packet (size doesn't match) : trashed\n");
- input_NetlistFreePES( p_input, p_pes );
- p_pes = NULL;
- /* Stats XXX?? */
+ /* We don't have any adaptation_field, so payload start immediately
+ after the 4 byte TS header */
+ p_ts_packet->i_payload_start = 4;
}
else
{
- /* The PES packet is valid. Check its type to test if it may
- carry additional informations in a header extension */
- p_pes->i_stream_id = p_pes->p_pes_header[3];
+ /* p[4] is adaptation_field_length minus one */
+ p_ts_packet->i_payload_start = 5 + p[4];
- switch( p_pes->i_stream_id )
+ /* The adaption field can be limited to the adaptation_field_length byte,
+ so that there is nothing to do: skip this possibility */
+ if( p[4] )
{
- case 0xBE: /* Padding */
- case 0xBC: /* Program stream map */
- case 0xBF: /* Private stream 2 */
- case 0xB0: /* ECM */
- case 0xB1: /* EMM */
- case 0xFF: /* Program stream directory */
- case 0xF2: /* DSMCC stream */
- case 0xF8: /* ITU-T H.222.1 type E stream */
- /* The payload begins immediatly after the 6 bytes header, so
- we have finished with the parsing */
- i_pes_header_size = 6;
- break;
-
- default:
- switch( p_pes->p_pes_header[8] & 0xc0 )
+ /* If the packet has both adaptation_field and payload, adaptation_field
+ cannot be more than 182 bytes long; if there is only an
+ adaptation_field, it must fill the next 183 bytes. */
+ if( b_payload ? (p[4] > 182) : (p[4] != 183) )
{
- case 0x80: /* MPEG2: 10xx xxxx */
- case 0x00: /* FIXME: This shouldn't be allowed !! */
- /* The PES header contains at least 3 more bytes: parse them */
- p_pes->b_data_alignment = p_pes->p_pes_header[6] & 0x04;
- p_pes->b_has_pts = p_pes->p_pes_header[7] & 0x80;
- i_pes_header_size = p_pes->p_pes_header[8] + 9;
+ intf_DbgMsg("input debug: invalid TS adaptation field (%p)\n",
+ p_ts_packet);
+#ifdef STATS
+ p_es_descriptor->c_invalid_packets++;
+#endif
+ b_trash = 1;
+ }
- /* Now parse the optional header extensions (in the limit of
- the 14 bytes */
- if( p_pes->b_has_pts )
+ /* No we are sure that the byte containing flags is present: read it */
+ else
+ {
+ /* discontinuity_indicator */
+ if( p[5] & 0x80 )
{
- pcr_descriptor_t * p_pcr;
-
- p_pcr = p_input->p_pcr;
+ intf_DbgMsg("discontinuity_indicator encountered by TS demux " \
+ "(position read: %d, saved: %d)\n", p[5] & 0x80,
+ p_es_descriptor->i_continuity_counter);
- p_pes->i_pts =
- ( ((mtime_t)(p_pes->p_pes_header[9] & 0x0E) << 29) |
- (((mtime_t)U16_AT(p_pes->p_pes_header + 10) << 14) - (1 << 14)) |
- ((mtime_t)U16_AT(p_pes->p_pes_header + 12) >> 1) ) * 300;
- p_pes->i_pts /= 27;
+ /* If the PID carries the PCR, there will be a system time-base
+ discontinuity. We let the PCR decoder handle that. */
+ p_es_descriptor->b_discontinuity = 1;
- if( p_pcr->i_synchro_state )
- {
- switch( p_pcr->i_synchro_state )
- {
- case SYNCHRO_NOT_STARTED:
- p_pes->b_has_pts = 0;
- break;
+ /* There also may be a continuity_counter discontinuity:
+ resynchronise our counter with the one of the stream */
+ p_es_descriptor->i_continuity_counter = (p[3] & 0x0f) - 1;
+ }
- case SYNCHRO_START:
- p_pes->i_pts += p_pcr->delta_pcr;
- p_pcr->delta_absolute = mdate() - p_pes->i_pts + INPUT_PTS_DELAY;
- p_pes->i_pts += p_pcr->delta_absolute;
- p_pcr->i_synchro_state = 0;
- break;
+ /* random_access_indicator */
+ p_es_descriptor->b_random |= p[5] & 0x40;
- case SYNCHRO_REINIT: /* We skip a PES */
- p_pes->b_has_pts = 0;
- p_pcr->i_synchro_state = SYNCHRO_START;
- break;
- }
- }
- else
+ /* If this is a PCR_PID, and this TS packet contains a PCR,
+ we pass it along to the PCR decoder. */
+ if( (p_es_descriptor->b_pcr) && (p[5] & 0x10) )
+ {
+ /* There should be a PCR field in the packet, check if the
+ adaption field is long enough to carry it */
+ if( p[4] >= 7 )
{
- p_pes->i_pts += p_pcr->delta_pcr + p_pcr->delta_absolute;
+ /* Call the PCR decoder */
+ input_PcrDecode( p_input, p_es_descriptor, &p[6] );
}
}
- break;
-
- default: /* MPEG1 or some strange thing */
- /* since this isn't supported yet, we certainly gonna crash */
- intf_ErrMsg( "FIXME: unknown PES type %.2x\n",
- p_pes->p_pes_header[8] );
- i_pes_header_size = 6;
- break;
-
}
- break;
}
+ }
+
+ /* Check the continuity of the stream. */
+ i_dummy = ((p[3] & 0x0f) - p_es_descriptor->i_continuity_counter) & 0x0f;
+ if( i_dummy == 1 )
+ {
+ /* Everything is ok, just increase our counter */
+ p_es_descriptor->i_continuity_counter++;
+ }
+ else
+ {
+ if( !b_payload && i_dummy == 0 )
+ {
+ /* This is a packet without payload, this is allowed by the draft
+ As there is nothing interesting in this packet (except PCR that
+ have already been handled), we can trash the packet. */
+ intf_DbgMsg("Packet without payload received by TS demux\n");
+ b_trash = 1;
+ }
+ else if( i_dummy <= 0 )
+ {
+ /* Duplicate packet: mark it as being to be trashed. */
+ intf_DbgMsg("Duplicate packet received by TS demux\n");
+ b_trash = 1;
+ }
+ else if( p_es_descriptor->i_continuity_counter == 0xFF )
+ {
+ /* This means that the packet is the first one we receive for this
+ ES since the continuity counter ranges between 0 and 0x0F
+ excepts when it has been initialized by the input: Init the
+ counter to the correct value. */
+ intf_DbgMsg("First packet for PID %d received by TS demux\n",
+ p_es_descriptor->i_id);
+ p_es_descriptor->i_continuity_counter = (p[3] & 0x0f);
+ }
+ else
+ {
+ /* This can indicate that we missed a packet or that the
+ continuity_counter wrapped and we received a dup packet: as we
+ don't know, do as if we missed a packet to be sure to recover
+ from this situation */
+ intf_DbgMsg("Packet lost by TS demux: current %d, packet %d\n",
+ p_es_descriptor->i_continuity_counter & 0x0f,
+ p[3] & 0x0f);
+ b_lost = 1;
+ p_es_descriptor->i_continuity_counter = p[3] & 0x0f;
+ }
+ }
- /* Now we've parsed the header, we just have to indicate in some
- * specific TS packets where the PES payload begins (renumber
- * i_payload_start), so that the decoders can find the beginning
- * of their data right out of the box. */
- p_ts = p_pes->p_first_ts;
- i_ts_payload_size = p_ts->i_payload_end - p_ts->i_payload_start;
- while( i_pes_header_size > i_ts_payload_size )
+ /* Trash the packet if it has no payload or if it is bad */
+ if( b_trash )
+ {
+ input_NetlistFreeTS( p_input, p_ts_packet );
+#ifdef STATS
+ p_input->c_packets_trashed++;
+#endif
+ }
+ else
+ {
+ if( p_es_descriptor->b_psi )
{
- /* These packets are entirely filled by the PES header. */
- i_pes_header_size -= i_ts_payload_size;
- p_ts->i_payload_start = p_ts->i_payload_end;
- /* Go to the next TS packet: here we won't have to test it is
- * not NULL because we trash the PES packets when packet lost
- * occurs */
- p_ts = p_ts->p_next_ts;
- i_ts_payload_size = p_ts->i_payload_end - p_ts->i_payload_start;
+ /* The payload contains PSI tables */
+ input_DemuxPSI( p_input, p_ts_packet, p_es_descriptor,
+ b_unit_start, b_lost );
}
- /* This last packet is partly header, partly payload. */
- p_ts->i_payload_start += i_pes_header_size;
-
-
- /* Now we can eventually put the PES packet in the decoder's
- * PES fifo */
- switch( p_es_descriptor->i_type )
+ else
{
- case MPEG1_VIDEO_ES:
- case MPEG2_VIDEO_ES:
- p_fifo = &(((vpar_thread_t*)(p_es_descriptor->p_dec))->fifo);
- break;
+ /* The payload carries a PES stream */
+ input_DemuxPES( p_input, p_ts_packet, p_es_descriptor,
+ b_unit_start, b_lost );
+ }
+ }
- case MPEG1_AUDIO_ES:
- case MPEG2_AUDIO_ES:
- p_fifo = &(((adec_thread_t*)(p_es_descriptor->p_dec))->fifo);
- break;
+#undef p
+}
- case AC3_AUDIO_ES:
- p_fifo = &(((ac3dec_thread_t *)(p_es_descriptor->p_dec))->fifo);
- break;
+/*****************************************************************************
+ * input_SortPacket: find out whether we need that packet
+ *****************************************************************************/
+static __inline__ void input_SortPacket( input_thread_t *p_input,
+ ts_packet_t *p_ts_packet )
+{
+ int i_current_pid;
+ int i_es_loop;
- case LPCM_AUDIO_ES:
- p_fifo = &(((lpcmdec_thread_t *)(p_es_descriptor->p_dec))->fifo);
- break;
+ /* Verify that sync_byte, error_indicator and scrambling_control are
+ what we expected. */
+ if( !(p_ts_packet->buffer[0] == 0x47) || (p_ts_packet->buffer[1] & 0x80) ||
+ (p_ts_packet->buffer[3] & 0xc0) )
+ {
+ intf_DbgMsg("input debug: invalid TS header (%p)\n", p_ts_packet);
+ }
+ else
+ {
+ /* Get the PID of the packet. Note that ntohs is needed, for endianness
+ purposes (see man page). */
+ i_current_pid = U16_AT(&p_ts_packet->buffer[1]) & 0x1fff;
- case DVD_SPU_ES:
- /* we skip the first byte at the beginning of the
- * subpicture payload, it only contains the SPU ID. */
- p_ts->i_payload_start++;
- p_fifo = &(((spudec_thread_t *)(p_es_descriptor->p_dec))->fifo);
- break;
+ //intf_DbgMsg("input debug: pid %d received (%p)\n",
+ // i_current_pid, p_ts_packet);
- default:
- /* This should never happen */
- intf_DbgMsg("Unknown stream type (%d, %d): PES trashed\n",
- p_es_descriptor->i_id, p_es_descriptor->i_type);
- p_fifo = NULL;
- break;
- }
+ /* Lock current ES state. */
+ vlc_mutex_lock( &p_input->es_lock );
- if( p_fifo != NULL )
+ /* Verify that we actually want this PID. */
+ for( i_es_loop = 0; i_es_loop < INPUT_MAX_SELECTED_ES; i_es_loop++ )
{
- vlc_mutex_lock( &p_fifo->data_lock );
- if( DECODER_FIFO_ISFULL( *p_fifo ) )
+ if( p_input->pp_selected_es[i_es_loop] != NULL)
{
- /* The FIFO is full !!! This should not happen. */
-#ifdef STATS
- p_input->c_packets_trashed += p_pes->i_ts_packets;
- p_es_descriptor->c_invalid_packets += p_pes->i_ts_packets;
-#endif
- input_NetlistFreePES( p_input, p_pes );
- intf_DbgMsg("PES trashed - fifo full ! (%d, %d)\n",
- p_es_descriptor->i_id, p_es_descriptor->i_type);
+ if( (*p_input->pp_selected_es[i_es_loop]).i_id
+ == i_current_pid )
+ {
+ /* Don't need the lock anymore, since the value pointed
+ out by p_input->pp_selected_es[i_es_loop] can only be
+ modified from inside the input_thread (by the PSI
+ decoder): interface thread is only allowed to modify
+ the pp_selected_es table */
+ vlc_mutex_unlock( &p_input->es_lock );
+
+ /* We're interested. Pass it to the demultiplexer. */
+ input_DemuxTS( p_input, p_ts_packet,
+ p_input->pp_selected_es[i_es_loop] );
+ return;
+ }
}
- else
+ else
{
- //intf_DbgMsg("Putting %p into fifo %p/%d\n",
- // p_pes, p_fifo, p_fifo->i_end);
- p_fifo->buffer[p_fifo->i_end] = p_pes;
- DECODER_FIFO_INCEND( *p_fifo );
-
- /* Warn the decoder that it's got work to do. */
- vlc_cond_signal( &p_fifo->data_wait );
+ /* pp_selected_es should not contain any hole. */
+ break;
}
- vlc_mutex_unlock( &p_fifo->data_lock );
}
- else
- {
- intf_DbgMsg("No fifo to receive PES %p: trash\n", p_pes);
+ vlc_mutex_unlock( &p_input->es_lock );
+ }
+
+ /* We weren't interested in receiving this packet. Give it back to the
+ netlist. */
+ //intf_DbgMsg("SortPacket: freeing unwanted TS %p (pid %d)\n", p_ts_packet,
+ // U16_AT(&p_ts_packet->buffer[1]) & 0x1fff);
+ input_NetlistFreeTS( p_input, p_ts_packet );
#ifdef STATS
- p_input->c_packets_trashed += p_pes->i_ts_packets;
- p_es_descriptor->c_invalid_packets += p_pes->i_ts_packets;
+ p_input->c_packets_trashed++;
#endif
- input_NetlistFreePES( p_input, p_pes );
- }
- }
-#undef p_pes
}
-
-
/*****************************************************************************
- * input_DemuxPSI:
- *****************************************************************************
- * Notice that current ES state has been locked by input_SortPacket.
- * (No more true, changed by benny - FIXME: See if it's ok, and definitely
- * change the code ?? )
+ * input_ReadPacket: reads a packet from the network or the file
*****************************************************************************/
-static __inline__ void input_DemuxPSI( input_thread_t *p_input,
- ts_packet_t *p_ts_packet,
- es_descriptor_t *p_es_descriptor,
- boolean_t b_unit_start, boolean_t b_packet_lost )
+static __inline__ int input_ReadPacket( input_thread_t *p_input )
{
- int i_data_offset; /* Offset of the interesting data in the TS packet */
- u16 i_data_length; /* Length of those data */
- //boolean_t b_first_section; /* another section in the TS packet ? */
+ int i_base_index; /* index of the first free iovec */
+ int i_current_index;
+ int i_packet_size;
+#ifdef INPUT_LIFO_TS_NETLIST
+ int i_meanwhile_released;
+ int i_currently_removed;
+#endif
+ ts_packet_t * p_ts_packet;
- ASSERT(p_input);
- ASSERT(p_ts_packet);
- ASSERT(p_es_descriptor);
+ /* In this function, we only care about the TS netlist. PES netlist
+ * is for the demultiplexer. */
+#ifdef INPUT_LIFO_TS_NETLIST
+ i_base_index = p_input->netlist.i_ts_index;
-#define p_psi (p_es_descriptor->p_psi_section)
+ /* Verify that we still have packets in the TS netlist */
+ if( (INPUT_MAX_TS + INPUT_TS_READ_ONCE - 1 - p_input->netlist.i_ts_index) <= INPUT_TS_READ_ONCE )
+ {
+ intf_ErrMsg("input error: TS netlist is empty !\n");
+ return( -1 );
+ }
- //intf_DbgMsg( "input debug: PSI demultiplexing %p (%p)\n", p_ts_packet, p_input);
+#else /* FIFO netlist */
+ i_base_index = p_input->netlist.i_ts_start;
+ if( p_input->netlist.i_ts_start + INPUT_TS_READ_ONCE -1 > INPUT_MAX_TS )
+ {
+ /* The netlist is splitted in 2 parts. We must gather them to consolidate
+ the FIFO (we make the loop easily in having the same iovec at the far
+ end and in the beginning of netlist_free).
+ That's why the netlist is (INPUT_MAX_TS +1) + (INPUT_TS_READ_ONCE -1)
+ large. */
+ memcpy( p_input->netlist.p_ts_free + INPUT_MAX_TS + 1,
+ p_input->netlist.p_ts_free,
+ (p_input->netlist.i_ts_start + INPUT_TS_READ_ONCE - 1 - INPUT_MAX_TS)
+ * sizeof(struct iovec) );
+ }
+
+ /* Verify that we still have packets in the TS netlist */
+ if( ((p_input->netlist.i_ts_end -1 - p_input->netlist.i_ts_start) & INPUT_MAX_TS) <= INPUT_TS_READ_ONCE )
+ {
+ intf_ErrMsg("input error: TS netlist is empty !\n");
+ return( -1 );
+ }
+#endif /* FIFO netlist */
+
+ /* Scatter read the buffer. */
+ i_packet_size = (*p_input->p_Read)( p_input,
+ &p_input->netlist.p_ts_free[i_base_index],
+ INPUT_TS_READ_ONCE );
+ if( i_packet_size == (-1) )
+ {
+#if 0
+ intf_DbgMsg("Read packet %d %p %d %d\n", i_base_index,
+ &p_input->netlist.p_ts_free[i_base_index],
+ p_input->netlist.i_ts_start,
+ p_input->netlist.i_ts_end);
+#endif
+ intf_ErrMsg("input error: readv() failed (%s)\n", strerror(errno));
+ return( -1 );
+ }
+
+ if( i_packet_size == 0 )
+ {
+ /* No packet has been received, so stop here. */
+ return( 0 );
+ }
+
+ /* Demultiplex the TS packets (1..INPUT_TS_READ_ONCE) received. */
+ for( i_current_index = i_base_index;
+ (i_packet_size -= TS_PACKET_SIZE) >= 0;
+ i_current_index++ )
+ {
+ /* BTW, something REALLY bad could happen if we receive packets with
+ a wrong size. */
+ p_ts_packet = (ts_packet_t*)(p_input->netlist.p_ts_free[i_current_index].iov_base);
+ /* Don't cry :-), we are allowed to do that cast, because initially,
+ our buffer was malloc'ed with sizeof(ts_packet_t) */
+
+ /* Find out if we need this packet and demultiplex. */
+ input_SortPacket( p_input /* for current PIDs and netlist */,
+ p_ts_packet);
+ }
+
+ if( i_packet_size > 0 )
+ {
+ intf_ErrMsg("input error: wrong size\n");
+ return( -1 );
+ }
- //intf_DbgMsg( "Packet: %x %x %x %x %x %x %x %x %x %x %x %x %x %x %x %x %x %x %x %x %x (unit start: %d)\n", p_ts_packet->buffer[p_ts_packet->i_payload_start], p_ts_packet->buffer[p_ts_packet->i_payload_start+1], p_ts_packet->buffer[p_ts_packet->i_payload_start+2], p_ts_packet->buffer[p_ts_packet->i_payload_start+3], p_ts_packet->buffer[p_ts_packet->i_payload_start+4], p_ts_packet->buffer[p_ts_packet->i_payload_start+5], p_ts_packet->buffer[p_ts_packet->i_payload_start+6], p_ts_packet->buffer[p_ts_packet->i_payload_start+7], p_ts_packet->buffer[p_ts_packet->i_payload_start+8], p_ts_packet->buffer[p_ts_packet->i_payload_start+9], p_ts_packet->buffer[p_ts_packet->i_payload_start+10], p_ts_packet->buffer[p_ts_packet->i_payload_start+11], p_ts_packet->buffer[p_ts_packet->i_payload_start+12], p_ts_packet->buffer[p_ts_packet->i_payload_start+13], p_ts_packet->buffer[p_ts_packet->i_payload_start+14], p_ts_packet->buffer[p_ts_packet->i_payload_start+15], p_ts_packet->buffer[p_ts_packet->i_payload_start+16], p_ts_packet->buffer[p_ts_packet->i_payload_start+17], p_ts_packet->buffer[p_ts_packet->i_payload_start+18], p_ts_packet->buffer[p_ts_packet->i_payload_start+19], p_ts_packet->buffer[p_ts_packet->i_payload_start+20], b_unit_start);
+ /* Remove the TS packets we have just filled from the netlist */
+#ifdef INPUT_LIFO_TS_NETLIST
+ /* We need to take a lock here while we're calculating index positions. */
+ vlc_mutex_lock( &p_input->netlist.lock );
+ i_meanwhile_released = i_base_index - p_input->netlist.i_ts_index;
+ if( i_meanwhile_released )
+ {
+ /* That's where it becomes funny :-). Since we didn't take locks for
+ efficiency reasons, other threads (including ourselves, with
+ input_DemuxPacket) might have released packets to the netlist.
+ So we have to copy these iovec where they should go.
- /* Try to find the beginning of the payload in the packet to initialise
- * the do-while loop that follows -> Compute the i_data_offset variable:
- * by default, the value is set so that we won't enter in the while loop.
- * It will be set to a correct value if the data are not corrupted */
- i_data_offset = TS_PACKET_SIZE;
+ BTW, that explains why the TS netlist is
+ (INPUT_MAX_TS +1) + (TS_READ_ONCE -1) large. */
- /* Has the reassembly of a section already begun in a previous packet ? */
- if( p_psi->b_running_section )
- {
- /* Was data lost since the last TS packet ? */
- if( b_packet_lost )
+ i_currently_removed = i_current_index - i_base_index;
+ if( i_meanwhile_released < i_currently_removed )
{
- /* Discard the packet and wait for the begining of a new one
- * to resynch */
- p_psi->b_running_section = 0;
- p_psi->i_current_position = 0;
- intf_DbgMsg( "PSI section(s) discarded due to packet loss\n" );
+ /* Copy all iovecs in that case */
+ memcpy( &p_input->netlist.p_ts_free[p_input->netlist.i_ts_index]
+ + i_currently_removed,
+ &p_input->netlist.p_ts_free[p_input->netlist.i_ts_index],
+ i_meanwhile_released * sizeof(struct iovec) );
}
else
{
- /* The data that complete a previously began section are always at
- * the beginning of the TS payload... */
- i_data_offset = p_ts_packet->i_payload_start;
- /* ...Unless there is a pointer field, that we have to bypass */
- if( b_unit_start )
- i_data_offset++;
- //intf_DbgMsg( "New part of the section received at offset %d\n", i_data_offset );
+ /* We have fewer places than items, so we only move
+ i_currently_removed of them. */
+ memcpy( &p_input->netlist.p_ts_free[i_base_index],
+ &p_input->netlist.p_ts_free[p_input->netlist.i_ts_index],
+ i_currently_removed * sizeof(struct iovec) );
}
+
+ /* Update i_netlist_index with the information gathered above. */
+ p_input->netlist.i_ts_index += i_currently_removed;
}
- /* We are looking for the beginning of a new section */
else
{
- if( b_unit_start )
- {
- /* Get the offset at which the data for that section can be found
- * The offset is stored in the pointer_field since we are
- * interested in the first section of the TS packet. Note that
- * the +1 is to bypass the pointer field */
- i_data_offset = p_ts_packet->i_payload_start +
- p_ts_packet->buffer[p_ts_packet->i_payload_start] + 1;
- //intf_DbgMsg( "New section beginning at offset %d in TS packet\n", i_data_offset );
- }
- else
- {
- /* This may either mean that the TS is bad or that the packet
- * contains the end of a section that had been discarded in a
- * previous loop: trash the TS packet since we cannot do
- * anything with those data: */
- p_psi->b_running_section = 0;
- p_psi->i_current_position = 0;
- intf_DbgMsg( "PSI packet discarded due to lack of synchronisation\n" );
- }
+ /* Nothing happened. */
+ p_input->netlist.i_ts_index = i_current_index;
}
- /* The section we will deal with during the first iteration of the
- * following loop is the first one contained in the TS packet */
- // b_first_section = 1;
+ vlc_mutex_unlock( &p_input->netlist.lock );
- /* Reassemble the pieces of sections contained in the TS packet and
- * decode the sections that could have been completed.
- * Stop when we reach the end of the packet or stuffing bytes */
- while( i_data_offset < TS_PACKET_SIZE && p_ts_packet->buffer[i_data_offset] != 0xFF )
+#else /* FIFO netlist */
+ /* & is modulo ; that's where we make the loop. */
+ p_input->netlist.i_ts_start = i_current_index & INPUT_MAX_TS;
+#endif
+
+#ifdef STATS
+ p_input->c_packets_read += i_current_index - i_base_index;
+ p_input->c_bytes += (i_current_index - i_base_index) * TS_PACKET_SIZE;
+#endif
+ return( 0 );
+}
+
+/*****************************************************************************
+ * RunThread: main thread loop
+ *****************************************************************************
+ * Thread in charge of processing the network packets and demultiplexing.
+ *****************************************************************************/
+static void RunThread( input_thread_t *p_input )
+{
+ /*
+ * Initialize thread and free configuration
+ */
+ p_input->b_error = InitThread( p_input );
+ if( p_input->b_error )
{
- /* If the current section is a new one, reinit the data fields of
- * the p_psi struct to start its decoding */
- if( !p_psi->b_running_section )
- {
- /* Read the length of the new section */
- p_psi->i_length = (U16_AT(&p_ts_packet->buffer[i_data_offset+1]) & 0xFFF) + 3;
- //intf_DbgMsg( "Section length %d\n", p_psi->i_length );
- if( p_psi->i_length > PSI_SECTION_SIZE )
- {
- /* The TS packet is corrupted, stop here to avoid possible
- * a seg fault */
- intf_DbgMsg( "PSI Section size is too big, aborting its reception\n" );
- break;
- }
+ free( p_input ); /* destroy descriptor */
+ return;
+ }
- /* Init the reassembly of that section */
- p_psi->b_running_section = 1;
- p_psi->i_current_position = 0;
+ /*
+ * Main loop
+ */
+ intf_DbgMsg("\n");
+ while( !p_input->b_die && !p_input->b_error )
+ {
+ /* Scatter read the UDP packet from the network or the file. */
+ if( (input_ReadPacket( p_input )) == (-1) )
+ {
+ /* FIXME??: Normally, a thread can't kill itself, but we don't have
+ * any method in case of an error condition ... */
+ p_input->b_error = 1;
}
- /* Compute the length of data related to the section in this TS packet */
- if( p_psi->i_length - p_psi->i_current_position > TS_PACKET_SIZE - i_data_offset)
- i_data_length = TS_PACKET_SIZE - i_data_offset;
- else
- i_data_length = p_psi->i_length - p_psi->i_current_position;
+#ifdef STATS
+ p_input->c_loops++;
+#endif
+ }
- /* Copy those data in the section buffer */
- memcpy( &p_psi->buffer[p_psi->i_current_position], &p_ts_packet->buffer[i_data_offset],
- i_data_length );
+ /*
+ * Error loop
+ */
+ if( p_input->b_error )
+ {
+ ErrorThread( p_input );
+ }
- /* Interesting data are now after the ones we copied, since no gap is
- * allowed between 2 sections in a TS packets */
- i_data_offset += i_data_length;
+ /* End of thread */
+ EndThread( p_input );
+ intf_DbgMsg("thread end\n");
+}
- /* Decode the packet if it is now complete */
- if (p_psi->i_length == p_psi->i_current_position + i_data_length)
- {
- /* Packet is complete, decode it */
- //intf_DbgMsg( "SECTION COMPLETE: starting decoding of its data\n" );
- input_PsiDecode( p_input, p_psi );
- /* Prepare the buffer to receive a new section */
- p_psi->i_current_position = 0;
- p_psi->b_running_section = 0;
+/*****************************************************************************
+ * ErrorThread: RunThread() error loop
+ *****************************************************************************
+ * This function is called when an error occured during thread main's loop.
+ *****************************************************************************/
+static void ErrorThread( input_thread_t *p_input )
+{
+ /* Wait until a `die' order */
+ intf_DbgMsg("\n");
+ while( !p_input->b_die )
+ {
+ /* Sleep a while */
+ msleep( VOUT_IDLE_SLEEP );
+ }
+}
- /* The new section won't be the first anymore */
- //b_first_section = 0;
- }
- else
+/*****************************************************************************
+ * EndThread: end the input thread
+ *****************************************************************************/
+static void EndThread( input_thread_t * p_input )
+{
+ int * pi_status; /* threas status */
+ int i_es_loop; /* es index */
+
+ /* Store status */
+ intf_DbgMsg("\n");
+ pi_status = p_input->pi_status;
+ *pi_status = THREAD_END;
+
+ /* Close input method */
+ p_input->p_Close( p_input );
+
+ /* Destroy all decoder threads */
+ for( i_es_loop = 0;
+ (i_es_loop < INPUT_MAX_ES) && (p_input->pp_selected_es[i_es_loop] != NULL) ;
+ i_es_loop++ )
+ {
+ switch( p_input->pp_selected_es[i_es_loop]->i_type )
{
- /* Prepare the buffer to receive the next part of the section */
- p_psi->i_current_position += i_data_length;
- //intf_DbgMsg( "Section not complete, waiting for the end\n" );
+ case MPEG1_VIDEO_ES:
+ case MPEG2_VIDEO_ES:
+ vpar_DestroyThread( (vpar_thread_t*)(p_input->pp_selected_es[i_es_loop]->p_dec) /*, NULL */ );
+ break;
+ case MPEG1_AUDIO_ES:
+ case MPEG2_AUDIO_ES:
+ adec_DestroyThread( (adec_thread_t*)(p_input->pp_selected_es[i_es_loop]->p_dec) );
+ break;
+ case AC3_AUDIO_ES:
+ ac3dec_DestroyThread( (ac3dec_thread_t *)(p_input->pp_selected_es[i_es_loop]->p_dec) );
+ break;
+ case LPCM_AUDIO_ES:
+ lpcmdec_DestroyThread((lpcmdec_thread_t *)(p_input->pp_selected_es[i_es_loop]->p_dec) );
+ break;
+ case DVD_SPU_ES:
+ spudec_DestroyThread( (spudec_thread_t *)(p_input->pp_selected_es[i_es_loop]->p_dec) );
+ break;
+ case 0:
+ /* Special streams for the PSI decoder, PID 0 and 1 */
+ break;
+#ifdef DEBUG
+ default:
+ intf_DbgMsg("error: unknown decoder type %d\n", p_input->pp_selected_es[i_es_loop]->i_type );
+ break;
+#endif
}
-
- //intf_DbgMsg( "Must loop ? Next data offset: %d, stuffing: %d\n",
- // i_data_offset, p_ts_packet->buffer[i_data_offset] );
}
- /* Relase the TS packet, we don't need it anymore */
- input_NetlistFreeTS( p_input, p_ts_packet );
+ input_NetlistEnd( p_input ); /* clean netlist */
+ input_PsiEnd( p_input ); /* clean PSI information */
+ input_PcrEnd( p_input ); /* clean PCR information */
+ free( p_input ); /* free input_thread structure */
-#undef p_psi
+ /* Update status */
+ *pi_status = THREAD_OVER;
}
projects / vlc / commitdiff