static u32 gf_ar_fill_output(void *ptr, char *buffer, u32 buffer_size)
{
u32 written;
GF_AudioRenderer *ar = (GF_AudioRenderer *) ptr;
if (!ar->need_reconfig) {
u32 delay_ms = ar->disable_resync ? 0 : ar->audio_delay;
if (ar->filter_chain.enable_filters) {
char *ptr = buffer;
u32 res = buffer_size;
written = 0;
delay_ms += ar->filter_chain.delay_ms;
while (buffer_size) {
u32 to_copy;
if (!ar->nb_used) {
u32 nb_bytes;
/*fill input block*/
nb_bytes = gf_mixer_get_output(ar->mixer, ar->filter_chain.tmp_block1, ar->filter_chain.min_block_size, delay_ms);
if (!nb_bytes)
return written;
/*delay used to check for late frames - we only use it on the first call to gf_mixer_get_output()*/
delay_ms = 0;
ar->nb_filled = gf_afc_process(&ar->filter_chain, nb_bytes);
if (!ar->nb_filled) continue;
}
to_copy = ar->nb_filled - ar->nb_used;
if (to_copy>buffer_size) to_copy = buffer_size;
memcpy(ptr, ar->filter_chain.tmp_block1 + ar->nb_used, to_copy);
ptr += to_copy;
buffer_size -= to_copy;
written += to_copy;
ar->nb_used += to_copy;
if (ar->nb_used==ar->nb_filled) ar->nb_used = 0;
}
assert(res==written);
} else {
written = gf_mixer_get_output(ar->mixer, buffer, buffer_size, delay_ms);
}
if (ar->audio_listeners) {
u32 k=0;
GF_AudioListener *l;
while ((l = gf_list_enum(ar->audio_listeners, &k))) {
l->on_audio_frame(l->udta, buffer, written, gf_sc_ar_get_clock(ar), delay_ms);
}
}
return written;
}
return 0;
}
static char *audiobuffer_fetch_frame(void *callback, u32 *size, u32 audio_delay_ms)
{
u32 blockAlign;
AudioBufferStack *st = (AudioBufferStack *) gf_node_get_private( ((GF_AudioInput *) callback)->owner);
M_AudioBuffer *ab = (M_AudioBuffer*)st->output.owner;
if (!st->is_init) return NULL;
if (!st->buffer) {
st->done = 0;
st->buffer_size = (u32) ceil(FIX2FLT(ab->length) * st->output.input_ifce.bps*st->output.input_ifce.samplerate*st->output.input_ifce.chan/8);
blockAlign = gf_mixer_get_block_align(st->am);
/*BLOCK ALIGN*/
while (st->buffer_size%blockAlign) st->buffer_size++;
st->buffer = (char*)gf_malloc(sizeof(char) * st->buffer_size);
memset(st->buffer, 0, sizeof(char) * st->buffer_size);
st->read_pos = st->write_pos = 0;
}
if (st->done) return NULL;
/*even if not active, fill the buffer*/
if (st->write_pos < st->buffer_size) {
u32 written;
while (1) {
/*just try to completely fill it*/
written = gf_mixer_get_output(st->am, st->buffer + st->write_pos, st->buffer_size - st->write_pos, 0);
if (!written) break;
st->write_pos += written;
assert(st->write_pos<=st->buffer_size);
}
}
/*not playing*/
if (! ab->isActive) return NULL;
*size = st->write_pos - st->read_pos;
return st->buffer + st->read_pos;
}
static u32 gf_ar_fill_output(void *ptr, char *buffer, u32 buffer_size)
{
u32 written;
GF_AudioRenderer *ar = (GF_AudioRenderer *) ptr;
if (!ar->need_reconfig) {
u32 delay_ms = ar->disable_resync ? 0 : ar->audio_delay;
if (ar->Frozen) {
memset(buffer, 0, buffer_size);
return buffer_size;
}
gf_mixer_lock(ar->mixer, GF_TRUE);
if (ar->filter_chain.enable_filters) {
char *ptr = buffer;
written = 0;
delay_ms += ar->filter_chain.delay_ms;
while (buffer_size) {
u32 to_copy;
if (!ar->nb_used) {
u32 nb_bytes;
/*fill input block*/
nb_bytes = gf_mixer_get_output(ar->mixer, ar->filter_chain.tmp_block1, ar->filter_chain.min_block_size, delay_ms);
if (!nb_bytes)
return written;
/*delay used to check for late frames - we only use it on the first call to gf_mixer_get_output()*/
delay_ms = 0;
ar->nb_filled = gf_afc_process(&ar->filter_chain, nb_bytes);
if (!ar->nb_filled) continue;
}
to_copy = ar->nb_filled - ar->nb_used;
if (to_copy>buffer_size) to_copy = buffer_size;
memcpy(ptr, ar->filter_chain.tmp_block1 + ar->nb_used, to_copy);
ptr += to_copy;
buffer_size -= to_copy;
written += to_copy;
ar->nb_used += to_copy;
if (ar->nb_used==ar->nb_filled) ar->nb_used = 0;
}
} else {
written = gf_mixer_get_output(ar->mixer, buffer, buffer_size, delay_ms);
}
gf_mixer_lock(ar->mixer, GF_FALSE);
//done with one sim step, go back in pause
if (ar->step_mode) {
ar->step_mode = GF_FALSE;
gf_ar_pause(ar, GF_TRUE, GF_FALSE, GF_FALSE);
}
if (!ar->need_reconfig) {
if (ar->audio_listeners) {
u32 k=0;
GF_AudioListener *l;
while ((l = (GF_AudioListener*)gf_list_enum(ar->audio_listeners, &k))) {
l->on_audio_frame(l->udta, buffer, buffer_size, gf_sc_ar_get_clock(ar), delay_ms);
}
}
ar->bytes_requested += buffer_size;
ar->current_time = ar->time_at_last_config + (u32) (ar->bytes_requested * 1000 / ar->bytes_per_second);
}
//always return buffer size (eg requested input size to be filled), since the clock is always increased by buffer_size (cf above line)
return buffer_size;
}
return 0;
}