void
decoder_flush_chunk(struct decoder *decoder)
{
struct decoder_control *dc = decoder->dc;
assert(decoder != NULL);
assert(decoder->chunk != NULL);
if (music_chunk_is_empty(decoder->chunk))
music_buffer_return(dc->buffer, decoder->chunk);
else
music_pipe_push(dc->pipe, decoder->chunk);
decoder->chunk = NULL;
}
static const char *
ao_chunk_data(struct audio_output *ao, const struct music_chunk *chunk,
struct filter *replay_gain_filter,
unsigned *replay_gain_serial_p,
size_t *length_r)
{
assert(chunk != NULL);
assert(!music_chunk_is_empty(chunk));
assert(music_chunk_check_format(chunk, &ao->in_audio_format));
const char *data = chunk->data;
size_t length = chunk->length;
(void)ao;
assert(length % audio_format_frame_size(&ao->in_audio_format) == 0);
if (length > 0 && replay_gain_filter != NULL) {
if (chunk->replay_gain_serial != *replay_gain_serial_p) {
replay_gain_filter_set_info(replay_gain_filter,
chunk->replay_gain_serial != 0
? &chunk->replay_gain_info
: NULL);
*replay_gain_serial_p = chunk->replay_gain_serial;
}
GError *error = NULL;
data = filter_filter(replay_gain_filter, data, length,
&length, &error);
if (data == NULL) {
g_warning("\"%s\" [%s] failed to filter: %s",
ao->name, ao->plugin->name, error->message);
g_error_free(error);
return NULL;
}
}
*length_r = length;
return data;
}
/**
* Obtains the next chunk from the music pipe, optionally applies
* cross-fading, and sends it to all audio outputs.
*
* @return true on success, false on error (playback will be stopped)
*/
static bool
play_next_chunk(struct player *player)
{
struct player_control *pc = player->pc;
struct decoder_control *dc = player->dc;
if (!audio_output_all_wait(pc, 64))
/* the output pipe is still large enough, don't send
another chunk */
return true;
unsigned cross_fade_position;
struct music_chunk *chunk = NULL;
if (player->xfade == XFADE_ENABLED &&
player_dc_at_next_song(player) &&
(cross_fade_position = music_pipe_size(player->pipe))
<= player->cross_fade_chunks) {
/* perform cross fade */
struct music_chunk *other_chunk =
music_pipe_shift(dc->pipe);
if (!player->cross_fading) {
/* beginning of the cross fade - adjust
crossFadeChunks which might be bigger than
the remaining number of chunks in the old
song */
player->cross_fade_chunks = cross_fade_position;
player->cross_fading = true;
}
if (other_chunk != NULL) {
chunk = music_pipe_shift(player->pipe);
assert(chunk != NULL);
assert(chunk->other == NULL);
/* don't send the tags of the new song (which
is being faded in) yet; postpone it until
the current song is faded out */
player->cross_fade_tag =
tag_merge_replace(player->cross_fade_tag,
other_chunk->tag);
other_chunk->tag = NULL;
if (isnan(pc->mixramp_delay_seconds)) {
chunk->mix_ratio = ((float)cross_fade_position)
/ player->cross_fade_chunks;
} else {
chunk->mix_ratio = nan("");
}
if (music_chunk_is_empty(other_chunk)) {
/* the "other" chunk was a music_chunk
which had only a tag, but no music
data - we cannot cross-fade that;
but since this happens only at the
beginning of the new song, we can
easily recover by throwing it away
now */
music_buffer_return(player_buffer,
other_chunk);
other_chunk = NULL;
}
chunk->other = other_chunk;
} else {
/* there are not enough decoded chunks yet */
decoder_lock(dc);
if (decoder_is_idle(dc)) {
/* the decoder isn't running, abort
cross fading */
decoder_unlock(dc);
player->xfade = XFADE_DISABLED;
} else {
/* wait for the decoder */
decoder_signal(dc);
player_wait_decoder(pc, dc);
decoder_unlock(dc);
return true;
}
}
}
if (chunk == NULL)
chunk = music_pipe_shift(player->pipe);
assert(chunk != NULL);
/* insert the postponed tag if cross-fading is finished */
if (player->xfade != XFADE_ENABLED && player->cross_fade_tag != NULL) {
chunk->tag = tag_merge_replace(chunk->tag,
player->cross_fade_tag);
player->cross_fade_tag = NULL;
}
/* play the current chunk */
if (!play_chunk(player->pc, player->song, chunk,
&player->play_audio_format)) {
music_buffer_return(player_buffer, chunk);
player_lock(pc);
pc->error = PLAYER_ERROR_AUDIO;
/* pause: the user may resume playback as soon as an
audio output becomes available */
pc->state = PLAYER_STATE_PAUSE;
player->paused = true;
player_unlock(pc);
return false;
}
/* this formula should prevent that the decoder gets woken up
with each chunk; it is more efficient to make it decode a
larger block at a time */
decoder_lock(dc);
if (!decoder_is_idle(dc) &&
music_pipe_size(dc->pipe) <= (pc->buffered_before_play +
music_buffer_size(player_buffer) * 3) / 4)
decoder_signal(dc);
decoder_unlock(dc);
return true;
}
static bool
ao_play_chunk(struct audio_output *ao, const struct music_chunk *chunk)
{
const char *data = chunk->data;
size_t size = chunk->length;
GError *error = NULL;
assert(ao != NULL);
assert(ao->filter != NULL);
assert(!music_chunk_is_empty(chunk));
assert(music_chunk_check_format(chunk, &ao->in_audio_format));
assert(size % audio_format_frame_size(&ao->in_audio_format) == 0);
if (chunk->tag != NULL) {
g_mutex_unlock(ao->mutex);
ao_plugin_send_tag(ao->plugin, ao->data, chunk->tag);
g_mutex_lock(ao->mutex);
}
/* update replay gain */
if (ao->replay_gain_filter != NULL &&
chunk->replay_gain_serial != ao->replay_gain_serial) {
replay_gain_filter_set_info(ao->replay_gain_filter,
chunk->replay_gain_serial != 0
? &chunk->replay_gain_info
: NULL);
ao->replay_gain_serial = chunk->replay_gain_serial;
}
if (size == 0)
return true;
data = filter_filter(ao->filter, data, size, &size, &error);
if (data == NULL) {
g_warning("\"%s\" [%s] failed to filter: %s",
ao->name, ao->plugin->name, error->message);
g_error_free(error);
ao_close(ao, false);
/* don't automatically reopen this device for 10
seconds */
ao->fail_timer = g_timer_new();
return false;
}
while (size > 0 && ao->command == AO_COMMAND_NONE) {
size_t nbytes;
g_mutex_unlock(ao->mutex);
nbytes = ao_plugin_play(ao->plugin, ao->data, data, size,
&error);
g_mutex_lock(ao->mutex);
if (nbytes == 0) {
/* play()==0 means failure */
g_warning("\"%s\" [%s] failed to play: %s",
ao->name, ao->plugin->name, error->message);
g_error_free(error);
ao_close(ao, false);
/* don't automatically reopen this device for
10 seconds */
ao->fail_timer = g_timer_new();
return false;
}
assert(nbytes <= size);
assert(nbytes % audio_format_frame_size(&ao->out_audio_format) == 0);
data += nbytes;
size -= nbytes;
}
return true;
}
