mirror of
https://github.com/mpv-player/mpv
synced 2024-12-24 15:52:25 +00:00
cleanup and bufferhandling fix by Joy Ping <joy at pingfm.org>. Bufferhandling fix based on idea by Marius David <marius at rohost.com>
git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@6590 b3059339-0415-0410-9bf9-f77b7e298cf2
This commit is contained in:
alex
parent
e9cf7c083b
commit
4f40ec312c
@ -3,16 +3,17 @@
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(C) Alex Beregszaszi <alex@naxine.org>
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modified for better alsa-0.9.0beta8a-support by Joy Winter <joy@pingfm.org>
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modified for better alsa-0.9.0beta12(rc1)-support by Joy Winter <joy@pingfm.org>
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additional AC3 passthrough support by Andy Lo A Foe <andy@alsaplayer.org>
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This driver is still at alpha stage.
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If you want stable sound-support use the OSS emulation instead.
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Any bugreports regarding to this driver are welcome either to the mplayer-user-mailinglist or directly to the authors.
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*/
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#include <errno.h>
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#include <sys/time.h>
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#include <stdlib.h>
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//#include <unistd.h>
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//#include <string.h>
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#include "../config.h"
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@ -46,13 +47,23 @@ static snd_pcm_format_t alsa_format;
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static snd_pcm_hw_params_t *alsa_hwparams;
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static snd_pcm_sw_params_t *alsa_swparams;
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static char *alsa_device;
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#define ALSA_DEVICE_SIZE 48
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static int alsa_fragsize = 8192; /* possible 4096, original 8192 */
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static int alsa_fragsize = OUTBURST; /* possible 4096, original 8192, OUTBURST is set statically to 512 in config.h but now its not used cause chunksize is allocated dynamically. */
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static int alsa_fragcount = 8;
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static int chunk_size = -1;
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static int start_delay = 1;
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static int buffer_size = 0;
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static int start_delay = 0;
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static int stop_delay = 0;
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static size_t bits_per_sample, bits_per_frame;
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static size_t chunk_bytes;
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#define ALSA_DEVICE_SIZE 48
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#define BUFFERTIME /* last undef */
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#undef SET_PERIOD /* only function now is to set chunksize staticaly, last defined */
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#define SW_PARAMS /* last undef */
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snd_pcm_t *
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spdif_init(int acard, int adevice)
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@ -178,12 +189,6 @@ static int control(int cmd, int arg)
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return(CONTROL_UNKNOWN);
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}
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#undef start /* orig. undef */
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#define buffsize
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#define buffertime /* orig. undef? */
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#define set_period
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#define sw_params /* orig. undef */
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#undef set_start_mode /* orig. undef */
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/*
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open & setup audio device
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@ -198,7 +203,7 @@ static int init(int rate_hz, int channels, int format, int flags)
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size_t xfer_align; //new
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snd_pcm_uframes_t start_threshold, stop_threshold; //new
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printf("alsa-init: this driver is still at alpha-stage. if you want stable sound support use the OSS emulation instead.\n");
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printf("alsa-init: testing and bugreports are welcome.\n");
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printf("alsa-init: requested format: %d Hz, %d channels, %s\n", rate_hz,
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channels, audio_out_format_name(format));
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@ -265,29 +270,47 @@ static int init(int rate_hz, int channels, int format, int flags)
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break;
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}
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if ((err = snd_pcm_info_malloc(&alsa_info)) < 0)
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{
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printf("alsa-init: memory allocation error: %s\n", snd_strerror(err));
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return(0);
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}
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if (ao_subdevice != NULL)
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if (ao_subdevice != NULL) // ?? makes no sense
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alsa_device = ao_subdevice;
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if (alsa_device == NULL)
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{
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if ((alsa_device = malloc(ALSA_DEVICE_SIZE)) == NULL)
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{
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{
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int tmp_device, tmp_subdevice, err;
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if ((err = snd_pcm_info_malloc(&alsa_info)) < 0)
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{
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printf("alsa-init: memory allocation error: %s\n", snd_strerror(err));
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return(0);
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}
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if ((alsa_device = alloca(ALSA_DEVICE_SIZE)) == NULL)
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{
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printf("alsa-init: memory allocation error: %s\n", strerror(errno));
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return(0);
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}
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}
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snprintf(alsa_device, ALSA_DEVICE_SIZE, "hw:%d,%d",
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snd_pcm_info_get_device(alsa_info),
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snd_pcm_info_get_subdevice(alsa_info));
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if ((tmp_device = snd_pcm_info_get_device(alsa_info)) < 0)
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{
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printf("alsa-init: cant get device\n");
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return(0);
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}
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if ((tmp_subdevice = snd_pcm_info_get_subdevice(alsa_info)) < 0)
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{
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printf("alsa-init: cant get subdevice\n");
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return(0);
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}
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if (verbose)
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printf("alsa-init: got device=%i, subdevice=%i\n", tmp_device, tmp_subdevice);
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if ((err = snprintf(alsa_device, ALSA_DEVICE_SIZE, "hw:%1d,%1d", tmp_device, tmp_subdevice)) <= 0)
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{
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printf("alsa-init: cant wrote device-id\n");
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}
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snd_pcm_info_free(alsa_info);
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}
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}
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printf("alsa-init: %d soundcard%s found, using: %s\n", cards+1,
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(cards >= 0) ? "" : "s", alsa_device);
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@ -298,16 +321,17 @@ static int init(int rate_hz, int channels, int format, int flags)
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}
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if (!alsa_handler) {
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if ((err = snd_pcm_open(&alsa_handler, alsa_device, SND_PCM_STREAM_PLAYBACK,
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0)) < 0)
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if ((err = snd_pcm_open(&alsa_handler,alsa_device,SND_PCM_STREAM_PLAYBACK,0)) < 0)
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{
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printf("alsa-init: playback open error: %s\n", snd_strerror(err));
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return(0);
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}
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}
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snd_pcm_hw_params_malloc(&alsa_hwparams);
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snd_pcm_hw_params_alloca(&alsa_hwparams);
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snd_pcm_sw_params_alloca(&alsa_swparams);
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// setting hw-parameters
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if ((err = snd_pcm_hw_params_any(alsa_handler, alsa_hwparams)) < 0)
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{
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printf("alsa-init: unable to get initial parameters: %s\n",
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@ -340,7 +364,6 @@ static int init(int rate_hz, int channels, int format, int flags)
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}
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if ((err = snd_pcm_hw_params_set_rate_near(alsa_handler, alsa_hwparams, ao_data.samplerate, 0)) < 0)
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/* was originally only snd_pcm_hw_params_set_rate jp*/
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{
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printf("alsa-init: unable to set samplerate-2: %s\n",
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snd_strerror(err));
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@ -348,37 +371,18 @@ static int init(int rate_hz, int channels, int format, int flags)
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return(0);
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}
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#ifdef set_period
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#ifdef SET_PERIOD
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{
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if ((err = snd_pcm_hw_params_set_period_size(alsa_handler, alsa_hwparams, alsa_fragsize / 4, 0)) < 0)
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if ((err = snd_pcm_hw_params_set_period_size(alsa_handler, alsa_hwparams, alsa_fragsize, 0)) < 0)
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{
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printf("alsa-init: unable to set periodsize: %s\n",
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snd_strerror(err));
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printf("alsa-init: unable to set periodsize: %s\n", snd_strerror(err));
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return(0);
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}
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if ((err = snd_pcm_hw_params_set_periods(alsa_handler, alsa_hwparams, alsa_fragcount, 0)) < 0)
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{
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printf("alsa-init: unable to set periods: %s\n",
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snd_strerror(err));
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return(0);
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}
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}
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#endif
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#ifdef buffsize
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if ((err = snd_pcm_hw_params_get_buffer_size(alsa_hwparams)) < 0)
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{
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printf("alsa-init: unable to get buffer size: %s\n",
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snd_strerror(err));
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return(0);
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} else
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{
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ao_data.buffersize = err;
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if (verbose)
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printf("alsa-init: got buffersize %i\n", ao_data.buffersize);
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}
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#endif
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#ifdef buffertime
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#ifdef BUFFERTIME
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{
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int alsa_buffer_time = 500000; /* original 60 */
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@ -397,105 +401,150 @@ static int init(int rate_hz, int channels, int format, int flags)
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snd_strerror(err));
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return(0);
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}
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printf("alsa-init: buffer_time: %d, period_time :%d\n",
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alsa_buffer_time, err);
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if (verbose)
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printf("alsa-init: buffer_time: %d, period_time :%d\n",alsa_buffer_time, err);
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}
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#endif
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/* get chunk-size */
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if ((err = snd_pcm_hw_params_get_period_size(alsa_hwparams, 0)) < 0)
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{
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printf("alsa-init: unable to get chunk-size in hw-params: %s\n", snd_strerror(err));
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return(0);
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} else
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{
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chunk_size = err;
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if (verbose) {printf("alsa-init: got chunksize %i\n", chunk_size);}
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}
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/* get buffer size */
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if ((err = snd_pcm_hw_params_get_buffer_size(alsa_hwparams)) < 0)
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{
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printf("alsa-init: unable to get buffersize in hw-params: %s\n", snd_strerror(err));
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return(0);
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} else
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{
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ao_data.buffersize = err;
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if (verbose) {printf("alsa-init: got buffersize %i\n", ao_data.buffersize);}
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}
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if (MAX_OUTBURST > ao_data.buffersize) { //warning if MAX_OUTBURST is bigger than buffersize
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printf("alsa-init: WARNING! MAX_OUTBURST exceeds your available buffersize.\nalsa-init: MAX_OUTBURST=%i, buffersize=%i\n",MAX_OUTBURST,ao_data.buffersize);}
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if (chunk_size == ao_data.buffersize)
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{
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printf("alsa-init: Can't use period equal to buffer size (%u == %lu)", chunk_size, (long)buffer_size);
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return(0);
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}
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/* finally install hardware parameters */
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if ((err = snd_pcm_hw_params(alsa_handler, alsa_hwparams)) < 0)
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{
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printf("alsa-init: unable to set parameters: %s\n",
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printf("alsa-init: unable to set hw-parameters: %s\n",
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snd_strerror(err));
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return(0);
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}
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// end setting hw-params
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#ifdef sw_params
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#ifdef SW_PARAMS
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{
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chunk_size = snd_pcm_hw_params_get_period_size(alsa_hwparams, 0);
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start_threshold = (double) ao_data.samplerate * start_delay / 1000000;
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xfer_align = snd_pcm_sw_params_get_xfer_align(alsa_swparams);
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size_t n;
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xfer_align = snd_pcm_sw_params_get_xfer_align(alsa_swparams);
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if (xfer_align == 0)
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xfer_align = 4;
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n = (ao_data.buffersize / xfer_align) * xfer_align;
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if (start_delay <= 0) {
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start_threshold = n + (double) ao_data.samplerate * start_delay / 1000000;
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} else {
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start_threshold = (double) ao_data.samplerate * start_delay / 1000000;
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}
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if (start_threshold < 1)
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start_threshold = 1;
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if (start_threshold > n)
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start_threshold = n;
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if (stop_delay <= 0) {
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stop_threshold = ao_data.buffersize + (double) ao_data.samplerate * stop_delay / 1000000;
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} else {
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stop_threshold = (double) ao_data.samplerate * stop_delay / 1000000;
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}
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if (verbose) {
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printf("alsa-init: start_threshold=%lu, stop_threshold=%lu\n",start_threshold,stop_threshold);
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printf("alsa-init: n=%i\n", n);
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}
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if ((err = snd_pcm_sw_params_current(alsa_handler, alsa_swparams)) < 0)
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{
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printf("alsa-init: unable to get parameters: %s\n",
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snd_strerror(err));
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{
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printf("alsa-init: unable to get parameters: %s\n",snd_strerror(err));
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return(0);
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}
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if ((err = snd_pcm_sw_params_set_avail_min(alsa_handler, alsa_swparams, chunk_size)) < 0)
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{
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printf("alsa-init: unable to set avail_min %s\n",snd_strerror(err));
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return(0);
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}
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}
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if ((err = snd_pcm_sw_params_set_start_threshold(alsa_handler, alsa_swparams, start_threshold)) < 0)
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{
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printf("alsa-init: unable to set start_threshold %s\n",snd_strerror(err));
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return(0);
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}
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}
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// if ((err = snd_pcm_sw_params_set_xfer_align(alsa_handler, alsa_swparams, xfer_align)) < 0)
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//{
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// printf("alsa-init: unable to set xfer_align: %s\n",
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// snd_strerror(err));
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// return(0);
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//}
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#ifdef set_start_mode
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if ((err = snd_pcm_sw_params_set_start_mode(alsa_handler, alsa_swparams,
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SND_PCM_START_DATA)) < 0)
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{
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printf("alsa-init: unable to set start mode: %s\n",
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snd_strerror(err));
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//set min available frames to consider pcm ready (4)
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if ((err = snd_pcm_sw_params_set_avail_min(alsa_handler, alsa_swparams, 4)) < 0)
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{
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printf("alsa-init: unable to set avail_min %s\n",snd_strerror(err));
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return(0);
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}
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#endif
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}
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if ((err = snd_pcm_sw_params_set_start_threshold(alsa_handler, alsa_swparams, start_threshold)) < 0)
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{
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printf("alsa-init: unable to set start_threshold %s\n",snd_strerror(err));
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return(0);
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}
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if ((err = snd_pcm_sw_params_set_stop_threshold(alsa_handler, alsa_swparams, stop_threshold)) < 0)
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{
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printf("alsa-init: unable to set stop_threshold %s\n",snd_strerror(err));
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return(0);
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}
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//transfers stream aligned to 4 in nonblocking-mode it would be 1
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if ((err = snd_pcm_sw_params_set_xfer_align(alsa_handler, alsa_swparams, 4)) < 0)
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{
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printf("alsa-init: unable to set xfer_align: %s\n",snd_strerror(err));
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return(0);
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}
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if ((err = snd_pcm_sw_params(alsa_handler, alsa_swparams)) < 0)
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{
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printf("alsa-init: unable to set parameters: %s\n",
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snd_strerror(err));
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{
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printf("alsa-init: unable to install sw-params\n");
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return(0);
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}
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bits_per_sample = snd_pcm_format_physical_width(alsa_format);
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bits_per_frame = bits_per_sample * channels;
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chunk_bytes = chunk_size * bits_per_frame / 8;
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if (verbose) {
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printf("alsa-init: bits per sample (bps)=%i, bits per frame (bpf)=%i, chunk_bytes=%i\n",bits_per_sample,bits_per_frame,chunk_bytes);}
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}
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// snd_pcm_sw_params_default(alsa_handler, alsa_swparams);
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#endif
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#endif //end swparams
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if ((err = snd_pcm_prepare(alsa_handler)) < 0)
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{
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printf("alsa-init: pcm prepare error: %s\n", snd_strerror(err));
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return(0);
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}
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#ifdef start
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if ((err = snd_pcm_start(alsa_handler)) < 0)
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{
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printf("alsa-init: pcm start error: %s\n", snd_strerror(err));
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if (err != -EPIPE)
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return(0);
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if ((err = snd_pcm_start(alsa_handler)) < 0)
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{
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printf("alsa-init: pcm start error: %s\n", snd_strerror(err));
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return(0);
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}
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}
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#endif
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printf("AUDIO: %d Hz/%d channels/%d bpf/%d bytes buffer/%s\n",
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printf("alsa9: %d Hz/%d channels/%d bpf/%d bytes buffer/%s\n",
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ao_data.samplerate, ao_data.channels, ao_data.bps, ao_data.buffersize,
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snd_pcm_format_description(alsa_format));
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return(1);
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}
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} // end init
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/* close audio device */
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static void uninit()
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{
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int err;
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if (alsa_device != NULL)
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free(alsa_device);
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//if (alsa_device != NULL)
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//free(alsa_device);
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snd_pcm_hw_params_free(alsa_hwparams);
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//snd_pcm_hw_params_free(alsa_hwparams);
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if ((err = snd_pcm_drain(alsa_handler)) < 0)
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{
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@ -503,19 +552,16 @@ static void uninit()
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return;
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}
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#ifdef start
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if ((err = snd_pcm_reset(alsa_handler)) < 0)
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{
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printf("alsa-uninit: pcm reset error: %s\n", snd_strerror(err));
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return;
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}
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#endif
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if ((err = snd_pcm_close(alsa_handler)) < 0)
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{
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printf("alsa-uninit: pcm close error: %s\n", snd_strerror(err));
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return;
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}
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else {
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alsa_handler = NULL;
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alsa_device = NULL;
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printf("alsa-uninit: pcm closed\n");
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}
|
||||
}
|
||||
|
||||
static void audio_pause()
|
||||
@ -546,14 +592,6 @@ static void audio_resume()
|
||||
printf("alsa-resume: pcm prepare error: %s\n", snd_strerror(err));
|
||||
return;
|
||||
}
|
||||
|
||||
#ifdef start
|
||||
if ((err = snd_pcm_start(alsa_handler)) < 0)
|
||||
{
|
||||
printf("alsa-resume: pcm start error: %s\n", snd_strerror(err));
|
||||
return;
|
||||
}
|
||||
#endif
|
||||
}
|
||||
|
||||
/* stop playing and empty buffers (for seeking/pause) */
|
||||
@ -567,62 +605,90 @@ static void reset()
|
||||
return;
|
||||
}
|
||||
|
||||
#ifdef start
|
||||
if ((err = snd_pcm_reset(alsa_handler)) < 0)
|
||||
{
|
||||
printf("alsa-reset: pcm reset error: %s\n", snd_strerror(err));
|
||||
return;
|
||||
}
|
||||
#endif
|
||||
|
||||
if ((err = snd_pcm_prepare(alsa_handler)) < 0)
|
||||
{
|
||||
printf("alsa-reset: pcm prepare error: %s\n", snd_strerror(err));
|
||||
return;
|
||||
}
|
||||
|
||||
#ifdef start
|
||||
if ((err = snd_pcm_start(alsa_handler)) < 0)
|
||||
{
|
||||
printf("alsa-reset: pcm start error: %s\n", snd_strerror(err));
|
||||
return;
|
||||
}
|
||||
#endif
|
||||
}
|
||||
|
||||
#ifndef timersub
|
||||
#define timersub(a, b, result) \
|
||||
do { \
|
||||
(result)->tv_sec = (a)->tv_sec - (b)->tv_sec; \
|
||||
(result)->tv_usec = (a)->tv_usec - (b)->tv_usec; \
|
||||
if ((result)->tv_usec < 0) { \
|
||||
--(result)->tv_sec; \
|
||||
(result)->tv_usec += 1000000; \
|
||||
} \
|
||||
} while (0)
|
||||
#endif
|
||||
|
||||
/*
|
||||
plays 'len' bytes of 'data'
|
||||
returns: number of bytes played
|
||||
modified last at 26.06.02 by jp
|
||||
*/
|
||||
|
||||
static int play(void* data, int len, int flags)
|
||||
{
|
||||
int got_len;
|
||||
|
||||
got_len = snd_pcm_writei(alsa_handler, data, len / 4);
|
||||
|
||||
//if ((got_len = snd_pcm_writei(alsa_handler, data, (len/ao_data.bps))) != (len/ao_data.bps)) {
|
||||
//SHOULD BE FIXED
|
||||
if (got_len == -EPIPE) /* underrun? */
|
||||
{
|
||||
printf("alsa-play: alsa underrun, resetting stream\n");
|
||||
if ((got_len = snd_pcm_prepare(alsa_handler)) < 0)
|
||||
{
|
||||
printf("alsa-play: playback prepare error: %s\n", snd_strerror(got_len));
|
||||
return(0);
|
||||
}
|
||||
if ((got_len = snd_pcm_writei(alsa_handler, data, (len/ao_data.bps))) != (len/ao_data.bps))
|
||||
{
|
||||
printf("alsa-play: write error after reset: %s - giving up\n",
|
||||
snd_strerror(got_len));
|
||||
return(0);
|
||||
}
|
||||
return(len); /* 2nd write was ok */
|
||||
|
||||
snd_pcm_status_t *status;
|
||||
|
||||
int num_frames=len/ao_data.bps;
|
||||
signed short *output_samples=data;
|
||||
snd_pcm_sframes_t res = 0;
|
||||
|
||||
if (!alsa_handler) {
|
||||
printf("alsa-play: device configuration error");
|
||||
return 0;
|
||||
}
|
||||
|
||||
do {
|
||||
if (res == -EPIPE) { /* underrun */
|
||||
snd_pcm_status_alloca(&status);
|
||||
if ((res = snd_pcm_status(alsa_handler, status))<0) {
|
||||
printf("alsa-play: buffer underrun. can't determine length");
|
||||
} else {
|
||||
if (snd_pcm_status_get_state(status) == SND_PCM_STATE_XRUN) {
|
||||
struct timeval now, diff, tstamp;
|
||||
gettimeofday(&now, 0);
|
||||
snd_pcm_status_get_trigger_tstamp(status, &tstamp);
|
||||
timersub(&now, &tstamp, &diff);
|
||||
printf("alsa-play: xrun of at least %.3f msecs. resetting stream",
|
||||
diff.tv_sec * 1000 + diff.tv_usec / 1000.0);
|
||||
} else
|
||||
printf("alsa-play: xrun. can't determine length");
|
||||
}
|
||||
res = snd_pcm_prepare(alsa_handler);
|
||||
}
|
||||
return(len);
|
||||
//}
|
||||
else if (res == -ESTRPIPE) { /* suspend */
|
||||
printf("alsa-play: pcm in suspend mode. trying to resume");
|
||||
while ((res = snd_pcm_resume(alsa_handler)) == -EAGAIN)
|
||||
sleep(1);
|
||||
if (res < 0)
|
||||
res = snd_pcm_prepare(alsa_handler);
|
||||
}
|
||||
|
||||
if (res >= 0)
|
||||
res = snd_pcm_writei(alsa_handler, (void *)output_samples, num_frames);
|
||||
|
||||
if (res > 0) {
|
||||
output_samples += ao_data.channels * res;
|
||||
num_frames -= res;
|
||||
}
|
||||
|
||||
} while (res == -EPIPE || num_frames > 0);
|
||||
|
||||
if (res < 0) {
|
||||
printf("alsa-play: write error %s", snd_strerror(res));
|
||||
return 0;
|
||||
}
|
||||
return res < 0 ? (int)res : len;
|
||||
}
|
||||
|
||||
|
||||
/* how many byes are free in the buffer */
|
||||
static int get_space()
|
||||
{
|
||||
@ -655,7 +721,8 @@ static int get_space()
|
||||
snd_pcm_status_free(status);
|
||||
|
||||
if (ret < 0)
|
||||
ret = 0;
|
||||
ret = 0;
|
||||
//printf("alsa-space: free space = %i",ret);
|
||||
return(ret);
|
||||
}
|
||||
|
||||
@ -691,6 +758,6 @@ static float get_delay()
|
||||
snd_pcm_status_free(status);
|
||||
|
||||
if (ret < 0)
|
||||
ret = 0;
|
||||
ret = 0;
|
||||
return(ret);
|
||||
}
|
||||
|
||||
@ -3,16 +3,17 @@
|
||||
|
||||
(C) Alex Beregszaszi <alex@naxine.org>
|
||||
|
||||
modified for better alsa-0.9.0beta8a-support by Joy Winter <joy@pingfm.org>
|
||||
modified for better alsa-0.9.0beta12(rc1)-support by Joy Winter <joy@pingfm.org>
|
||||
additional AC3 passthrough support by Andy Lo A Foe <andy@alsaplayer.org>
|
||||
|
||||
This driver is still at alpha stage.
|
||||
If you want stable sound-support use the OSS emulation instead.
|
||||
|
||||
Any bugreports regarding to this driver are welcome either to the mplayer-user-mailinglist or directly to the authors.
|
||||
*/
|
||||
|
||||
#include <errno.h>
|
||||
#include <sys/time.h>
|
||||
#include <stdlib.h>
|
||||
//#include <unistd.h>
|
||||
//#include <string.h>
|
||||
|
||||
#include "../config.h"
|
||||
|
||||
@ -46,13 +47,23 @@ static snd_pcm_format_t alsa_format;
|
||||
static snd_pcm_hw_params_t *alsa_hwparams;
|
||||
static snd_pcm_sw_params_t *alsa_swparams;
|
||||
static char *alsa_device;
|
||||
#define ALSA_DEVICE_SIZE 48
|
||||
|
||||
static int alsa_fragsize = 8192; /* possible 4096, original 8192 */
|
||||
static int alsa_fragsize = OUTBURST; /* possible 4096, original 8192, OUTBURST is set statically to 512 in config.h but now its not used cause chunksize is allocated dynamically. */
|
||||
static int alsa_fragcount = 8;
|
||||
|
||||
static int chunk_size = -1;
|
||||
static int start_delay = 1;
|
||||
static int buffer_size = 0;
|
||||
static int start_delay = 0;
|
||||
static int stop_delay = 0;
|
||||
static size_t bits_per_sample, bits_per_frame;
|
||||
static size_t chunk_bytes;
|
||||
|
||||
#define ALSA_DEVICE_SIZE 48
|
||||
|
||||
#define BUFFERTIME /* last undef */
|
||||
#undef SET_PERIOD /* only function now is to set chunksize staticaly, last defined */
|
||||
#define SW_PARAMS /* last undef */
|
||||
|
||||
|
||||
snd_pcm_t *
|
||||
spdif_init(int acard, int adevice)
|
||||
@ -178,12 +189,6 @@ static int control(int cmd, int arg)
|
||||
return(CONTROL_UNKNOWN);
|
||||
}
|
||||
|
||||
#undef start /* orig. undef */
|
||||
#define buffsize
|
||||
#define buffertime /* orig. undef? */
|
||||
#define set_period
|
||||
#define sw_params /* orig. undef */
|
||||
#undef set_start_mode /* orig. undef */
|
||||
|
||||
/*
|
||||
open & setup audio device
|
||||
@ -198,7 +203,7 @@ static int init(int rate_hz, int channels, int format, int flags)
|
||||
size_t xfer_align; //new
|
||||
snd_pcm_uframes_t start_threshold, stop_threshold; //new
|
||||
|
||||
printf("alsa-init: this driver is still at alpha-stage. if you want stable sound support use the OSS emulation instead.\n");
|
||||
printf("alsa-init: testing and bugreports are welcome.\n");
|
||||
printf("alsa-init: requested format: %d Hz, %d channels, %s\n", rate_hz,
|
||||
channels, audio_out_format_name(format));
|
||||
|
||||
@ -265,29 +270,47 @@ static int init(int rate_hz, int channels, int format, int flags)
|
||||
break;
|
||||
}
|
||||
|
||||
if ((err = snd_pcm_info_malloc(&alsa_info)) < 0)
|
||||
{
|
||||
printf("alsa-init: memory allocation error: %s\n", snd_strerror(err));
|
||||
return(0);
|
||||
}
|
||||
|
||||
if (ao_subdevice != NULL)
|
||||
if (ao_subdevice != NULL) // ?? makes no sense
|
||||
alsa_device = ao_subdevice;
|
||||
|
||||
if (alsa_device == NULL)
|
||||
{
|
||||
if ((alsa_device = malloc(ALSA_DEVICE_SIZE)) == NULL)
|
||||
{
|
||||
{
|
||||
int tmp_device, tmp_subdevice, err;
|
||||
|
||||
if ((err = snd_pcm_info_malloc(&alsa_info)) < 0)
|
||||
{
|
||||
printf("alsa-init: memory allocation error: %s\n", snd_strerror(err));
|
||||
return(0);
|
||||
}
|
||||
|
||||
if ((alsa_device = alloca(ALSA_DEVICE_SIZE)) == NULL)
|
||||
{
|
||||
printf("alsa-init: memory allocation error: %s\n", strerror(errno));
|
||||
return(0);
|
||||
}
|
||||
}
|
||||
|
||||
snprintf(alsa_device, ALSA_DEVICE_SIZE, "hw:%d,%d",
|
||||
snd_pcm_info_get_device(alsa_info),
|
||||
snd_pcm_info_get_subdevice(alsa_info));
|
||||
if ((tmp_device = snd_pcm_info_get_device(alsa_info)) < 0)
|
||||
{
|
||||
printf("alsa-init: cant get device\n");
|
||||
return(0);
|
||||
}
|
||||
|
||||
if ((tmp_subdevice = snd_pcm_info_get_subdevice(alsa_info)) < 0)
|
||||
{
|
||||
printf("alsa-init: cant get subdevice\n");
|
||||
return(0);
|
||||
}
|
||||
|
||||
if (verbose)
|
||||
printf("alsa-init: got device=%i, subdevice=%i\n", tmp_device, tmp_subdevice);
|
||||
|
||||
if ((err = snprintf(alsa_device, ALSA_DEVICE_SIZE, "hw:%1d,%1d", tmp_device, tmp_subdevice)) <= 0)
|
||||
{
|
||||
printf("alsa-init: cant wrote device-id\n");
|
||||
}
|
||||
|
||||
snd_pcm_info_free(alsa_info);
|
||||
}
|
||||
}
|
||||
|
||||
printf("alsa-init: %d soundcard%s found, using: %s\n", cards+1,
|
||||
(cards >= 0) ? "" : "s", alsa_device);
|
||||
@ -298,16 +321,17 @@ static int init(int rate_hz, int channels, int format, int flags)
|
||||
}
|
||||
|
||||
if (!alsa_handler) {
|
||||
if ((err = snd_pcm_open(&alsa_handler, alsa_device, SND_PCM_STREAM_PLAYBACK,
|
||||
0)) < 0)
|
||||
if ((err = snd_pcm_open(&alsa_handler,alsa_device,SND_PCM_STREAM_PLAYBACK,0)) < 0)
|
||||
{
|
||||
printf("alsa-init: playback open error: %s\n", snd_strerror(err));
|
||||
return(0);
|
||||
}
|
||||
}
|
||||
|
||||
snd_pcm_hw_params_malloc(&alsa_hwparams);
|
||||
snd_pcm_hw_params_alloca(&alsa_hwparams);
|
||||
snd_pcm_sw_params_alloca(&alsa_swparams);
|
||||
|
||||
// setting hw-parameters
|
||||
if ((err = snd_pcm_hw_params_any(alsa_handler, alsa_hwparams)) < 0)
|
||||
{
|
||||
printf("alsa-init: unable to get initial parameters: %s\n",
|
||||
@ -340,7 +364,6 @@ static int init(int rate_hz, int channels, int format, int flags)
|
||||
}
|
||||
|
||||
if ((err = snd_pcm_hw_params_set_rate_near(alsa_handler, alsa_hwparams, ao_data.samplerate, 0)) < 0)
|
||||
/* was originally only snd_pcm_hw_params_set_rate jp*/
|
||||
{
|
||||
printf("alsa-init: unable to set samplerate-2: %s\n",
|
||||
snd_strerror(err));
|
||||
@ -348,37 +371,18 @@ static int init(int rate_hz, int channels, int format, int flags)
|
||||
return(0);
|
||||
}
|
||||
|
||||
#ifdef set_period
|
||||
|
||||
#ifdef SET_PERIOD
|
||||
{
|
||||
if ((err = snd_pcm_hw_params_set_period_size(alsa_handler, alsa_hwparams, alsa_fragsize / 4, 0)) < 0)
|
||||
if ((err = snd_pcm_hw_params_set_period_size(alsa_handler, alsa_hwparams, alsa_fragsize, 0)) < 0)
|
||||
{
|
||||
printf("alsa-init: unable to set periodsize: %s\n",
|
||||
snd_strerror(err));
|
||||
printf("alsa-init: unable to set periodsize: %s\n", snd_strerror(err));
|
||||
return(0);
|
||||
}
|
||||
if ((err = snd_pcm_hw_params_set_periods(alsa_handler, alsa_hwparams, alsa_fragcount, 0)) < 0)
|
||||
{
|
||||
printf("alsa-init: unable to set periods: %s\n",
|
||||
snd_strerror(err));
|
||||
return(0);
|
||||
}
|
||||
}
|
||||
#endif
|
||||
#ifdef buffsize
|
||||
if ((err = snd_pcm_hw_params_get_buffer_size(alsa_hwparams)) < 0)
|
||||
{
|
||||
printf("alsa-init: unable to get buffer size: %s\n",
|
||||
snd_strerror(err));
|
||||
return(0);
|
||||
} else
|
||||
{
|
||||
ao_data.buffersize = err;
|
||||
if (verbose)
|
||||
printf("alsa-init: got buffersize %i\n", ao_data.buffersize);
|
||||
}
|
||||
#endif
|
||||
|
||||
#ifdef buffertime
|
||||
#ifdef BUFFERTIME
|
||||
{
|
||||
int alsa_buffer_time = 500000; /* original 60 */
|
||||
|
||||
@ -397,105 +401,150 @@ static int init(int rate_hz, int channels, int format, int flags)
|
||||
snd_strerror(err));
|
||||
return(0);
|
||||
}
|
||||
printf("alsa-init: buffer_time: %d, period_time :%d\n",
|
||||
alsa_buffer_time, err);
|
||||
if (verbose)
|
||||
printf("alsa-init: buffer_time: %d, period_time :%d\n",alsa_buffer_time, err);
|
||||
}
|
||||
#endif
|
||||
|
||||
/* get chunk-size */
|
||||
if ((err = snd_pcm_hw_params_get_period_size(alsa_hwparams, 0)) < 0)
|
||||
{
|
||||
printf("alsa-init: unable to get chunk-size in hw-params: %s\n", snd_strerror(err));
|
||||
return(0);
|
||||
} else
|
||||
{
|
||||
chunk_size = err;
|
||||
if (verbose) {printf("alsa-init: got chunksize %i\n", chunk_size);}
|
||||
}
|
||||
|
||||
/* get buffer size */
|
||||
if ((err = snd_pcm_hw_params_get_buffer_size(alsa_hwparams)) < 0)
|
||||
{
|
||||
printf("alsa-init: unable to get buffersize in hw-params: %s\n", snd_strerror(err));
|
||||
return(0);
|
||||
} else
|
||||
{
|
||||
ao_data.buffersize = err;
|
||||
if (verbose) {printf("alsa-init: got buffersize %i\n", ao_data.buffersize);}
|
||||
}
|
||||
|
||||
if (MAX_OUTBURST > ao_data.buffersize) { //warning if MAX_OUTBURST is bigger than buffersize
|
||||
printf("alsa-init: WARNING! MAX_OUTBURST exceeds your available buffersize.\nalsa-init: MAX_OUTBURST=%i, buffersize=%i\n",MAX_OUTBURST,ao_data.buffersize);}
|
||||
|
||||
if (chunk_size == ao_data.buffersize)
|
||||
{
|
||||
printf("alsa-init: Can't use period equal to buffer size (%u == %lu)", chunk_size, (long)buffer_size);
|
||||
return(0);
|
||||
}
|
||||
|
||||
/* finally install hardware parameters */
|
||||
if ((err = snd_pcm_hw_params(alsa_handler, alsa_hwparams)) < 0)
|
||||
{
|
||||
printf("alsa-init: unable to set parameters: %s\n",
|
||||
printf("alsa-init: unable to set hw-parameters: %s\n",
|
||||
snd_strerror(err));
|
||||
return(0);
|
||||
}
|
||||
// end setting hw-params
|
||||
|
||||
#ifdef sw_params
|
||||
#ifdef SW_PARAMS
|
||||
{
|
||||
chunk_size = snd_pcm_hw_params_get_period_size(alsa_hwparams, 0);
|
||||
start_threshold = (double) ao_data.samplerate * start_delay / 1000000;
|
||||
xfer_align = snd_pcm_sw_params_get_xfer_align(alsa_swparams);
|
||||
size_t n;
|
||||
xfer_align = snd_pcm_sw_params_get_xfer_align(alsa_swparams);
|
||||
if (xfer_align == 0)
|
||||
xfer_align = 4;
|
||||
n = (ao_data.buffersize / xfer_align) * xfer_align;
|
||||
|
||||
if (start_delay <= 0) {
|
||||
start_threshold = n + (double) ao_data.samplerate * start_delay / 1000000;
|
||||
} else {
|
||||
start_threshold = (double) ao_data.samplerate * start_delay / 1000000;
|
||||
}
|
||||
if (start_threshold < 1)
|
||||
start_threshold = 1;
|
||||
if (start_threshold > n)
|
||||
start_threshold = n;
|
||||
|
||||
if (stop_delay <= 0) {
|
||||
stop_threshold = ao_data.buffersize + (double) ao_data.samplerate * stop_delay / 1000000;
|
||||
} else {
|
||||
stop_threshold = (double) ao_data.samplerate * stop_delay / 1000000;
|
||||
}
|
||||
|
||||
if (verbose) {
|
||||
printf("alsa-init: start_threshold=%lu, stop_threshold=%lu\n",start_threshold,stop_threshold);
|
||||
printf("alsa-init: n=%i\n", n);
|
||||
}
|
||||
|
||||
if ((err = snd_pcm_sw_params_current(alsa_handler, alsa_swparams)) < 0)
|
||||
{
|
||||
printf("alsa-init: unable to get parameters: %s\n",
|
||||
snd_strerror(err));
|
||||
{
|
||||
printf("alsa-init: unable to get parameters: %s\n",snd_strerror(err));
|
||||
return(0);
|
||||
}
|
||||
|
||||
if ((err = snd_pcm_sw_params_set_avail_min(alsa_handler, alsa_swparams, chunk_size)) < 0)
|
||||
{
|
||||
printf("alsa-init: unable to set avail_min %s\n",snd_strerror(err));
|
||||
return(0);
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
|
||||
if ((err = snd_pcm_sw_params_set_start_threshold(alsa_handler, alsa_swparams, start_threshold)) < 0)
|
||||
{
|
||||
printf("alsa-init: unable to set start_threshold %s\n",snd_strerror(err));
|
||||
return(0);
|
||||
}
|
||||
}
|
||||
// if ((err = snd_pcm_sw_params_set_xfer_align(alsa_handler, alsa_swparams, xfer_align)) < 0)
|
||||
//{
|
||||
// printf("alsa-init: unable to set xfer_align: %s\n",
|
||||
// snd_strerror(err));
|
||||
// return(0);
|
||||
//}
|
||||
|
||||
#ifdef set_start_mode
|
||||
if ((err = snd_pcm_sw_params_set_start_mode(alsa_handler, alsa_swparams,
|
||||
SND_PCM_START_DATA)) < 0)
|
||||
{
|
||||
printf("alsa-init: unable to set start mode: %s\n",
|
||||
snd_strerror(err));
|
||||
//set min available frames to consider pcm ready (4)
|
||||
if ((err = snd_pcm_sw_params_set_avail_min(alsa_handler, alsa_swparams, 4)) < 0)
|
||||
{
|
||||
printf("alsa-init: unable to set avail_min %s\n",snd_strerror(err));
|
||||
return(0);
|
||||
}
|
||||
#endif
|
||||
}
|
||||
|
||||
if ((err = snd_pcm_sw_params_set_start_threshold(alsa_handler, alsa_swparams, start_threshold)) < 0)
|
||||
{
|
||||
printf("alsa-init: unable to set start_threshold %s\n",snd_strerror(err));
|
||||
return(0);
|
||||
}
|
||||
|
||||
if ((err = snd_pcm_sw_params_set_stop_threshold(alsa_handler, alsa_swparams, stop_threshold)) < 0)
|
||||
{
|
||||
printf("alsa-init: unable to set stop_threshold %s\n",snd_strerror(err));
|
||||
return(0);
|
||||
}
|
||||
|
||||
//transfers stream aligned to 4 in nonblocking-mode it would be 1
|
||||
if ((err = snd_pcm_sw_params_set_xfer_align(alsa_handler, alsa_swparams, 4)) < 0)
|
||||
{
|
||||
printf("alsa-init: unable to set xfer_align: %s\n",snd_strerror(err));
|
||||
return(0);
|
||||
}
|
||||
|
||||
if ((err = snd_pcm_sw_params(alsa_handler, alsa_swparams)) < 0)
|
||||
{
|
||||
printf("alsa-init: unable to set parameters: %s\n",
|
||||
snd_strerror(err));
|
||||
{
|
||||
printf("alsa-init: unable to install sw-params\n");
|
||||
return(0);
|
||||
}
|
||||
|
||||
bits_per_sample = snd_pcm_format_physical_width(alsa_format);
|
||||
bits_per_frame = bits_per_sample * channels;
|
||||
chunk_bytes = chunk_size * bits_per_frame / 8;
|
||||
|
||||
if (verbose) {
|
||||
printf("alsa-init: bits per sample (bps)=%i, bits per frame (bpf)=%i, chunk_bytes=%i\n",bits_per_sample,bits_per_frame,chunk_bytes);}
|
||||
}
|
||||
|
||||
// snd_pcm_sw_params_default(alsa_handler, alsa_swparams);
|
||||
#endif
|
||||
#endif //end swparams
|
||||
|
||||
if ((err = snd_pcm_prepare(alsa_handler)) < 0)
|
||||
{
|
||||
printf("alsa-init: pcm prepare error: %s\n", snd_strerror(err));
|
||||
return(0);
|
||||
}
|
||||
|
||||
#ifdef start
|
||||
if ((err = snd_pcm_start(alsa_handler)) < 0)
|
||||
{
|
||||
printf("alsa-init: pcm start error: %s\n", snd_strerror(err));
|
||||
if (err != -EPIPE)
|
||||
return(0);
|
||||
if ((err = snd_pcm_start(alsa_handler)) < 0)
|
||||
{
|
||||
printf("alsa-init: pcm start error: %s\n", snd_strerror(err));
|
||||
return(0);
|
||||
}
|
||||
}
|
||||
#endif
|
||||
printf("AUDIO: %d Hz/%d channels/%d bpf/%d bytes buffer/%s\n",
|
||||
printf("alsa9: %d Hz/%d channels/%d bpf/%d bytes buffer/%s\n",
|
||||
ao_data.samplerate, ao_data.channels, ao_data.bps, ao_data.buffersize,
|
||||
snd_pcm_format_description(alsa_format));
|
||||
return(1);
|
||||
}
|
||||
} // end init
|
||||
|
||||
|
||||
/* close audio device */
|
||||
static void uninit()
|
||||
{
|
||||
int err;
|
||||
|
||||
if (alsa_device != NULL)
|
||||
free(alsa_device);
|
||||
//if (alsa_device != NULL)
|
||||
//free(alsa_device);
|
||||
|
||||
snd_pcm_hw_params_free(alsa_hwparams);
|
||||
//snd_pcm_hw_params_free(alsa_hwparams);
|
||||
|
||||
if ((err = snd_pcm_drain(alsa_handler)) < 0)
|
||||
{
|
||||
@ -503,19 +552,16 @@ static void uninit()
|
||||
return;
|
||||
}
|
||||
|
||||
#ifdef start
|
||||
if ((err = snd_pcm_reset(alsa_handler)) < 0)
|
||||
{
|
||||
printf("alsa-uninit: pcm reset error: %s\n", snd_strerror(err));
|
||||
return;
|
||||
}
|
||||
#endif
|
||||
|
||||
if ((err = snd_pcm_close(alsa_handler)) < 0)
|
||||
{
|
||||
printf("alsa-uninit: pcm close error: %s\n", snd_strerror(err));
|
||||
return;
|
||||
}
|
||||
else {
|
||||
alsa_handler = NULL;
|
||||
alsa_device = NULL;
|
||||
printf("alsa-uninit: pcm closed\n");
|
||||
}
|
||||
}
|
||||
|
||||
static void audio_pause()
|
||||
@ -546,14 +592,6 @@ static void audio_resume()
|
||||
printf("alsa-resume: pcm prepare error: %s\n", snd_strerror(err));
|
||||
return;
|
||||
}
|
||||
|
||||
#ifdef start
|
||||
if ((err = snd_pcm_start(alsa_handler)) < 0)
|
||||
{
|
||||
printf("alsa-resume: pcm start error: %s\n", snd_strerror(err));
|
||||
return;
|
||||
}
|
||||
#endif
|
||||
}
|
||||
|
||||
/* stop playing and empty buffers (for seeking/pause) */
|
||||
@ -567,62 +605,90 @@ static void reset()
|
||||
return;
|
||||
}
|
||||
|
||||
#ifdef start
|
||||
if ((err = snd_pcm_reset(alsa_handler)) < 0)
|
||||
{
|
||||
printf("alsa-reset: pcm reset error: %s\n", snd_strerror(err));
|
||||
return;
|
||||
}
|
||||
#endif
|
||||
|
||||
if ((err = snd_pcm_prepare(alsa_handler)) < 0)
|
||||
{
|
||||
printf("alsa-reset: pcm prepare error: %s\n", snd_strerror(err));
|
||||
return;
|
||||
}
|
||||
|
||||
#ifdef start
|
||||
if ((err = snd_pcm_start(alsa_handler)) < 0)
|
||||
{
|
||||
printf("alsa-reset: pcm start error: %s\n", snd_strerror(err));
|
||||
return;
|
||||
}
|
||||
#endif
|
||||
}
|
||||
|
||||
#ifndef timersub
|
||||
#define timersub(a, b, result) \
|
||||
do { \
|
||||
(result)->tv_sec = (a)->tv_sec - (b)->tv_sec; \
|
||||
(result)->tv_usec = (a)->tv_usec - (b)->tv_usec; \
|
||||
if ((result)->tv_usec < 0) { \
|
||||
--(result)->tv_sec; \
|
||||
(result)->tv_usec += 1000000; \
|
||||
} \
|
||||
} while (0)
|
||||
#endif
|
||||
|
||||
/*
|
||||
plays 'len' bytes of 'data'
|
||||
returns: number of bytes played
|
||||
modified last at 26.06.02 by jp
|
||||
*/
|
||||
|
||||
static int play(void* data, int len, int flags)
|
||||
{
|
||||
int got_len;
|
||||
|
||||
got_len = snd_pcm_writei(alsa_handler, data, len / 4);
|
||||
|
||||
//if ((got_len = snd_pcm_writei(alsa_handler, data, (len/ao_data.bps))) != (len/ao_data.bps)) {
|
||||
//SHOULD BE FIXED
|
||||
if (got_len == -EPIPE) /* underrun? */
|
||||
{
|
||||
printf("alsa-play: alsa underrun, resetting stream\n");
|
||||
if ((got_len = snd_pcm_prepare(alsa_handler)) < 0)
|
||||
{
|
||||
printf("alsa-play: playback prepare error: %s\n", snd_strerror(got_len));
|
||||
return(0);
|
||||
}
|
||||
if ((got_len = snd_pcm_writei(alsa_handler, data, (len/ao_data.bps))) != (len/ao_data.bps))
|
||||
{
|
||||
printf("alsa-play: write error after reset: %s - giving up\n",
|
||||
snd_strerror(got_len));
|
||||
return(0);
|
||||
}
|
||||
return(len); /* 2nd write was ok */
|
||||
|
||||
snd_pcm_status_t *status;
|
||||
|
||||
int num_frames=len/ao_data.bps;
|
||||
signed short *output_samples=data;
|
||||
snd_pcm_sframes_t res = 0;
|
||||
|
||||
if (!alsa_handler) {
|
||||
printf("alsa-play: device configuration error");
|
||||
return 0;
|
||||
}
|
||||
|
||||
do {
|
||||
if (res == -EPIPE) { /* underrun */
|
||||
snd_pcm_status_alloca(&status);
|
||||
if ((res = snd_pcm_status(alsa_handler, status))<0) {
|
||||
printf("alsa-play: buffer underrun. can't determine length");
|
||||
} else {
|
||||
if (snd_pcm_status_get_state(status) == SND_PCM_STATE_XRUN) {
|
||||
struct timeval now, diff, tstamp;
|
||||
gettimeofday(&now, 0);
|
||||
snd_pcm_status_get_trigger_tstamp(status, &tstamp);
|
||||
timersub(&now, &tstamp, &diff);
|
||||
printf("alsa-play: xrun of at least %.3f msecs. resetting stream",
|
||||
diff.tv_sec * 1000 + diff.tv_usec / 1000.0);
|
||||
} else
|
||||
printf("alsa-play: xrun. can't determine length");
|
||||
}
|
||||
res = snd_pcm_prepare(alsa_handler);
|
||||
}
|
||||
return(len);
|
||||
//}
|
||||
else if (res == -ESTRPIPE) { /* suspend */
|
||||
printf("alsa-play: pcm in suspend mode. trying to resume");
|
||||
while ((res = snd_pcm_resume(alsa_handler)) == -EAGAIN)
|
||||
sleep(1);
|
||||
if (res < 0)
|
||||
res = snd_pcm_prepare(alsa_handler);
|
||||
}
|
||||
|
||||
if (res >= 0)
|
||||
res = snd_pcm_writei(alsa_handler, (void *)output_samples, num_frames);
|
||||
|
||||
if (res > 0) {
|
||||
output_samples += ao_data.channels * res;
|
||||
num_frames -= res;
|
||||
}
|
||||
|
||||
} while (res == -EPIPE || num_frames > 0);
|
||||
|
||||
if (res < 0) {
|
||||
printf("alsa-play: write error %s", snd_strerror(res));
|
||||
return 0;
|
||||
}
|
||||
return res < 0 ? (int)res : len;
|
||||
}
|
||||
|
||||
|
||||
/* how many byes are free in the buffer */
|
||||
static int get_space()
|
||||
{
|
||||
@ -655,7 +721,8 @@ static int get_space()
|
||||
snd_pcm_status_free(status);
|
||||
|
||||
if (ret < 0)
|
||||
ret = 0;
|
||||
ret = 0;
|
||||
//printf("alsa-space: free space = %i",ret);
|
||||
return(ret);
|
||||
}
|
||||
|
||||
@ -691,6 +758,6 @@ static float get_delay()
|
||||
snd_pcm_status_free(status);
|
||||
|
||||
if (ret < 0)
|
||||
ret = 0;
|
||||
ret = 0;
|
||||
return(ret);
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue
Block a user