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Improved ao_arts delay and buff er handling, patch by Szombathelyi Gy|rgy <gyurco@freemail.hu> 

git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@6808 b3059339-0415-0410-9bf9-f77b7e298cf2
This commit is contained in:
atmos4 2002-07-26 00:02:31 +00:00
parent 9751597015
commit 000819f4fe
1 changed files with 20 additions and 19 deletions
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39
libao2/ao_arts.c
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@ -18,6 +18,10 @@
#define OBTAIN_BITRATE(a) (((a != AFMT_U8) || (a != AFMT_S8)) ? 16 : 8)
/* Feel free to experiment with the following values: */
#define ARTS_PACKETS 10 /* Number of audio packets */
#define ARTS_PACKET_SIZE_LOG2 11 /* Log2 of audio packet size */
static arts_stream_t stream;
static ao_info_t info =
@ -44,34 +48,36 @@ static int init(int rate_hz, int channels, int format, int flags)
mp_msg(MSGT_AO, MSGL_ERR, "AO: [arts] %s\n", arts_error_text(err));
return 0;
}
else
mp_msg(MSGT_AO, MSGL_INFO, "AO: [arts] Connected to sound server\n");
mp_msg(MSGT_AO, MSGL_INFO, "AO: [arts] Connected to sound server\n");
ao_data.format = format;
ao_data.channels = channels;
ao_data.samplerate = rate_hz;
ao_data.bps = (rate_hz*channels);
ao_data.buffersize = 4096;
if(format != AFMT_U8 && format != AFMT_S8)
ao_data.bps*=2;
for (frag_spec = 0; (0x01<<frag_spec) < ao_data.buffersize; ++frag_spec)
;
frag_spec |= 0x00020000;
stream=arts_play_stream(rate_hz, OBTAIN_BITRATE(format), channels, "Mplayer");
arts_stream_set(stream, ARTS_P_PACKET_SETTINGS, frag_spec);
arts_stream_set(stream, ARTS_P_BLOCKING, 0);
if(stream == NULL) {
mp_msg(MSGT_AO, MSGL_ERR, "AO: [arts] Unable to open a stream\n");
arts_free();
return 0;
}
else
mp_msg(MSGT_AO, MSGL_INFO, "AO: [arts] Stream opened\n");
/* Set the stream to blocking: it will not block anyway, but it seems */
/* to be working better */
arts_stream_set(stream, ARTS_P_BLOCKING, 1);
frag_spec = ARTS_PACKET_SIZE_LOG2 | ARTS_PACKETS << 16;
arts_stream_set(stream, ARTS_P_PACKET_SETTINGS, frag_spec);
ao_data.buffersize = arts_stream_get(stream, ARTS_P_BUFFER_SIZE);
mp_msg(MSGT_AO, MSGL_INFO, "AO: [arts] Stream opened\n");
mp_msg(MSGT_AO, MSGL_INFO,"AO: [arts] buffer size: %d\n",
ao_data.buffersize);
mp_msg(MSGT_AO, MSGL_INFO,"AO: [arts] packet size: %d\n",
arts_stream_get(stream, ARTS_P_PACKET_SIZE));
return 1;
}
@ -84,7 +90,7 @@ static void uninit()
static int play(void* data,int len,int flags)
{
arts_write(stream, data, len);
return arts_write(stream, data, len);
}
static void audio_pause()
@ -106,12 +112,7 @@ static int get_space()
static float get_delay()
{
return ((float) arts_stream_get(stream, ARTS_P_BUFFER_SIZE) / (float) ao_data.bps);
return ((float) (ao_data.buffersize - arts_stream_get(stream,
ARTS_P_BUFFER_SPACE))) / ((float) ao_data.bps);
}