- int i, i_first_input = 0;
- aout_buffer_t * p_output_buffer;
- mtime_t start_date, end_date;
- date_t exact_start_date;
-
- if( !p_aout->p_mixer )
- {
- /* Free all incoming buffers. */
- aout_lock_input_fifos( p_aout );
- for ( i = 0; i < p_aout->i_nb_inputs; i++ )
- {
- aout_input_t * p_input = p_aout->pp_inputs[i];
- aout_buffer_t * p_buffer = p_input->mixer.fifo.p_first;
- if ( p_input->b_error ) continue;
- while ( p_buffer != NULL )
- {
- aout_buffer_t * p_next = p_buffer->p_next;
- aout_BufferFree( p_buffer );
- p_buffer = p_next;
- }
- }
- aout_unlock_input_fifos( p_aout );
- return -1;
- }
-
-
- aout_lock_output_fifo( p_aout );
- aout_lock_input_fifos( p_aout );
-
- /* Retrieve the date of the next buffer. */
- exact_start_date = p_aout->output.fifo.end_date;
- start_date = date_Get( &exact_start_date );
-
- if ( start_date != 0 && start_date < mdate() )
- {
- /* The output is _very_ late. This can only happen if the user
- * pauses the stream (or if the decoder is buggy, which cannot
- * happen :). */
- msg_Warn( p_aout, "output PTS is out of range (%"PRId64"), clearing out",
- mdate() - start_date );
- aout_FifoSet( p_aout, &p_aout->output.fifo, 0 );
- date_Set( &exact_start_date, 0 );
- start_date = 0;
- }
-
- aout_unlock_output_fifo( p_aout );
-
- /* See if we have enough data to prepare a new buffer for the audio
- * output. First : start date. */
- if ( !start_date )
- {
- /* Find the latest start date available. */
- for ( i = 0; i < p_aout->i_nb_inputs; i++ )
- {
- aout_input_t * p_input = p_aout->pp_inputs[i];
- aout_fifo_t * p_fifo = &p_input->mixer.fifo;
- aout_buffer_t * p_buffer;
-
- if ( p_input->b_error || p_input->b_paused )
- continue;
-
- p_buffer = p_fifo->p_first;
- while ( p_buffer != NULL && p_buffer->i_pts < mdate() )
- {
- msg_Warn( p_aout, "input PTS is out of range (%"PRId64"), "
- "trashing", mdate() - p_buffer->i_pts );
- p_buffer = aout_FifoPop( p_aout, p_fifo );
- aout_BufferFree( p_buffer );
- p_buffer = p_fifo->p_first;
- p_input->mixer.begin = NULL;
- }
-
- if ( p_buffer == NULL )
- {
- break;
- }
-
- if ( !start_date || start_date < p_buffer->i_pts )
- {
- date_Set( &exact_start_date, p_buffer->i_pts );
- start_date = p_buffer->i_pts;
- }
- }
-
- if ( i < p_aout->i_nb_inputs )
- {
- /* Interrupted before the end... We can't run. */
- aout_unlock_input_fifos( p_aout );
- return -1;
- }
- }
- date_Increment( &exact_start_date, p_aout->output.i_nb_samples );
- end_date = date_Get( &exact_start_date );
-
- /* Check that start_date and end_date are available for all input
- * streams. */
- for ( i = 0; i < p_aout->i_nb_inputs; i++ )
- {
- aout_input_t * p_input = p_aout->pp_inputs[i];
- aout_fifo_t * p_fifo = &p_input->mixer.fifo;
- aout_buffer_t * p_buffer;
- mtime_t prev_date;
- bool b_drop_buffers;
-
- p_input->mixer.is_invalid = p_input->b_error || p_input->b_paused;
- if ( p_input->mixer.is_invalid )
- {
- if ( i_first_input == i ) i_first_input++;
- continue;
- }
-
- p_buffer = p_fifo->p_first;
- if ( p_buffer == NULL )
- {
- break;
- }
-
- /* Check for the continuity of start_date */
- while ( p_buffer != NULL
- && p_buffer->i_pts + p_buffer->i_length < start_date - 1 )
- {
- /* We authorize a +-1 because rounding errors get compensated
- * regularly. */
- aout_buffer_t * p_next = p_buffer->p_next;
- msg_Warn( p_aout, "the mixer got a packet in the past (%"PRId64")",
- start_date - (p_buffer->i_pts + p_buffer->i_length) );
- aout_BufferFree( p_buffer );
- p_fifo->p_first = p_buffer = p_next;
- p_input->mixer.begin = NULL;
- }
- if ( p_buffer == NULL )
- {
- p_fifo->pp_last = &p_fifo->p_first;
- break;
- }
-
- /* Check that we have enough samples. */
- for ( ; ; )
- {
- p_buffer = p_fifo->p_first;
- if ( p_buffer == NULL ) break;
- if ( p_buffer->i_pts + p_buffer->i_length >= end_date ) break;
-
- /* Check that all buffers are contiguous. */
- prev_date = p_fifo->p_first->i_pts + p_fifo->p_first->i_length;
- p_buffer = p_buffer->p_next;
- b_drop_buffers = 0;
- for ( ; p_buffer != NULL; p_buffer = p_buffer->p_next )
- {
- if ( prev_date != p_buffer->i_pts )
- {
- msg_Warn( p_aout,
- "buffer hole, dropping packets (%"PRId64")",
- p_buffer->i_pts - prev_date );
- b_drop_buffers = 1;
- break;
- }
- if ( p_buffer->i_pts + p_buffer->i_length >= end_date ) break;
- prev_date = p_buffer->i_pts + p_buffer->i_length;
- }
- if ( b_drop_buffers )
- {
- aout_buffer_t * p_deleted = p_fifo->p_first;
- while ( p_deleted != NULL && p_deleted != p_buffer )
- {
- aout_buffer_t * p_next = p_deleted->p_next;
- aout_BufferFree( p_deleted );
- p_deleted = p_next;
- }
- p_fifo->p_first = p_deleted; /* == p_buffer */
- }
- else break;
- }
- if ( p_buffer == NULL ) break;