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patch from Miroslav to show smoothed instantaneous bitrate

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This commit is contained in:
Josh Coalson 2002-11-14 04:56:57 +00:00
parent 2db4e1d276
commit ec348fddb5
1 changed files with 43 additions and 6 deletions
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49
src/plugin_xmms/plugin.c
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@ -58,6 +58,7 @@ typedef struct {
unsigned channels;
unsigned sample_rate;
unsigned length_in_msec;
gchar *title;
AFormat sample_format;
int seek_to_in_sec;
FLAC__bool has_replaygain;
@ -115,11 +116,18 @@ InputPlugin flac_ip =
static FLAC__int32 reservoir_[FLAC__MAX_BLOCK_SIZE * 2/*for overflow*/ * FLAC_PLUGIN__MAX_SUPPORTED_CHANNELS];
static FLAC__byte sample_buffer_[SAMPLES_PER_WRITE * FLAC_PLUGIN__MAX_SUPPORTED_CHANNELS * (24/8)]; /* (24/8) for max bytes per sample */
static unsigned wide_samples_in_reservoir_ = 0;
static FLAC__FileDecoder *decoder_ = 0;
static file_info_struct file_info_;
static pthread_t decode_thread_;
static FLAC__bool audio_error_ = false;
#define BITRATE_HIST_SEGMENT_MSEC 500
/* 500ms * 50 = 25s should be enough */
#define BITRATE_HIST_SIZE 50
static unsigned bitrate_history_[BITRATE_HIST_SIZE];
InputPlugin *get_iplugin_info()
{
flac_ip.description = g_strdup_printf("Reference FLAC Player v%s", FLAC__VERSION_STRING);
@ -188,7 +196,6 @@ int FLAC_XMMS__is_our_file(char *filename)
void FLAC_XMMS__play_file(char *filename)
{
FILE *f;
gchar *ret;
wide_samples_in_reservoir_ = 0;
audio_error_ = false;
@ -219,10 +226,8 @@ void FLAC_XMMS__play_file(char *filename)
return;
}
ret = flac_format_song_title(filename);
flac_ip.set_info(ret, file_info_.length_in_msec, file_info_.sample_rate * file_info_.channels * file_info_.bits_per_sample, file_info_.sample_rate, file_info_.channels);
g_free(ret);
file_info_.title = flac_format_song_title(filename);
flac_ip.set_info(file_info_.title, file_info_.length_in_msec, file_info_.sample_rate * file_info_.channels * file_info_.bits_per_sample, file_info_.sample_rate, file_info_.channels);
file_info_.seek_to_in_sec = -1;
file_info_.play_thread_open = true;
@ -304,6 +309,9 @@ void FLAC_XMMS__get_song_info(char *filename, char **title, int *length_in_msec)
void *play_loop_(void *arg)
{
unsigned written_time_last = 0, bh_index_last_w = 0, bh_index_last_o = BITRATE_HIST_SIZE;
FLAC__uint64 decode_position_last = 0;
(void)arg;
while(file_info_.is_playing) {
@ -326,7 +334,8 @@ void *play_loop_(void *arg)
const unsigned n = min(wide_samples_in_reservoir_, SAMPLES_PER_WRITE);
const unsigned delta = n * channels;
int bytes;
unsigned i;
unsigned i, written_time, bh_index_w;
FLAC__uint64 decode_position;
if(flac_cfg.output.replaygain.enable && file_info_.has_replaygain) {
bytes = (int)FLAC__plugin_common__apply_gain(
@ -365,6 +374,23 @@ void *play_loop_(void *arg)
xmms_usleep(10000);
if(file_info_.is_playing && file_info_.seek_to_in_sec == -1)
flac_ip.output->write_audio(sample_buffer_, bytes);
/* compute current bitrate */
written_time = flac_ip.output->written_time();
bh_index_w = written_time / BITRATE_HIST_SEGMENT_MSEC % BITRATE_HIST_SIZE ;
if(bh_index_w != bh_index_last_w && wide_samples_in_reservoir_ < SAMPLES_PER_WRITE) {
bh_index_last_w = bh_index_w;
if(!FLAC__file_decoder_get_decode_position(decoder_, &decode_position))
decode_position = 0;
bitrate_history_[(bh_index_w + BITRATE_HIST_SIZE - 1) % BITRATE_HIST_SIZE] =
decode_position > decode_position_last && written_time > written_time_last ?
8000 * (decode_position - decode_position_last) / (written_time - written_time_last) :
file_info_.sample_rate * file_info_.channels * file_info_.bits_per_sample;
decode_position_last = decode_position;
written_time_last = written_time;
}
}
else {
file_info_.eof = true;
@ -378,11 +404,20 @@ void *play_loop_(void *arg)
unsigned target_sample = (unsigned)(distance * (double)file_info_.total_samples);
if(FLAC__file_decoder_seek_absolute(decoder_, (FLAC__uint64)target_sample)) {
flac_ip.output->flush(file_info_.seek_to_in_sec * 1000);
bh_index_last_w = bh_index_last_o = file_info_.seek_to_in_sec * 1000 / BITRATE_HIST_SEGMENT_MSEC % BITRATE_HIST_SIZE;
file_info_.seek_to_in_sec = -1;
file_info_.eof = false;
wide_samples_in_reservoir_ = 0;
}
}
else {
/* display the right bitrate from history */
unsigned bh_index_o = flac_ip.output->output_time() / BITRATE_HIST_SEGMENT_MSEC % BITRATE_HIST_SIZE;
if(bh_index_o != bh_index_last_o && bh_index_last_w != bh_index_o) {
bh_index_last_o = bh_index_o;
flac_ip.set_info(file_info_.title, file_info_.length_in_msec, bitrate_history_[bh_index_o], file_info_.sample_rate, file_info_.channels);
}
}
}
safe_decoder_finish_(decoder_);
@ -391,6 +426,8 @@ void *play_loop_(void *arg)
flac_ip.output->buffer_free();
flac_ip.output->buffer_free();
g_free(file_info_.title);
pthread_exit(NULL);
return 0; /* to silence the compiler warning about not returning a value */
}