-
-/*****************************************************************************
- * DoWork: mix a new output buffer
- *****************************************************************************
- * Terminology : in this function a word designates a single float32, eg.
- * a stereo sample is consituted of two words.
- *****************************************************************************/
-static void DoWork( aout_instance_t * p_aout, aout_buffer_t * p_buffer )
-{
- const int i_nb_inputs = p_aout->i_nb_inputs;
- const float f_multiplier_global = p_aout->mixer.f_multiplier;
- const int i_nb_channels = aout_FormatNbChannels( &p_aout->mixer.mixer );
- int i_input;
-
- for ( i_input = 0; i_input < i_nb_inputs; i_input++ )
- {
- int i_nb_words = p_buffer->i_nb_samples * i_nb_channels;
- aout_input_t * p_input = p_aout->pp_inputs[i_input];
- float f_multiplier = f_multiplier_global * p_input->f_multiplier;
-
- float * p_out = (float *)p_buffer->p_buffer;
- float * p_in = (float *)p_input->p_first_byte_to_mix;
-
- if ( p_input->b_error ) continue;
-
- for ( ; ; )
- {
- ptrdiff_t i_available_words = (
- (float *)p_input->fifo.p_first->p_buffer - p_in)
- + p_input->fifo.p_first->i_nb_samples
- * i_nb_channels;
-
- if ( i_available_words < i_nb_words )
- {
- aout_buffer_t * p_old_buffer;
-
- if ( i_available_words > 0 )
- {
- if ( !i_input )
- {
- ScaleWords( p_out, p_in, i_available_words,
- i_nb_inputs, f_multiplier );
- }
- else
- {
- MeanWords( p_out, p_in, i_available_words,
- i_nb_inputs, f_multiplier );
- }
- }
-
- i_nb_words -= i_available_words;
- p_out += i_available_words;
-
- /* Next buffer */
- p_old_buffer = aout_FifoPop( p_aout, &p_input->fifo );
- aout_BufferFree( p_old_buffer );
- if ( p_input->fifo.p_first == NULL )
- {
- msg_Err( p_aout, "internal amix error" );
- return;
- }
- p_in = (float *)p_input->fifo.p_first->p_buffer;
- }
- else
- {
- if ( i_nb_words > 0 )
- {
- if ( !i_input )
- {
- ScaleWords( p_out, p_in, i_nb_words, i_nb_inputs,
- f_multiplier );
- }
- else
- {
- MeanWords( p_out, p_in, i_nb_words, i_nb_inputs,
- f_multiplier );
- }
- }
- p_input->p_first_byte_to_mix = (void *)(p_in
- + i_nb_words);
- break;
- }
- }
- }
-}
-