enable chosen single channel
This commit is contained in:
Baozhu Zuo
parent
6a0b216dbf
commit
f362cdd383
1 changed files with 249 additions and 144 deletions
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@ -5,193 +5,291 @@
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#include <alsa/asoundlib.h>
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#include <alsa/pcm_external.h>
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#include <alsa/pcm_plugin.h>
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#include "ac108_help.h"
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#include <math.h>
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#define ARRAY_SIZE(ary) (sizeof(ary)/sizeof(ary[0]))
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#define AC108_FRAME_SIZE 4096
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struct ac108_t {
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snd_pcm_ioplug_t io;
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snd_pcm_t *slave;
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snd_pcm_t *pcm;
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snd_pcm_hw_params_t *hw_params;
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unsigned int last_size;
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unsigned int ptr;
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void *buf;
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unsigned int latency; // Delay in usec
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unsigned int bufferSize; // Size of sample buffer
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};
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/* set up the fixed parameters of slave PCM hw_parmas */
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static int ac108_slave_hw_params_half(struct ac108_t *rec, unsigned int rate,snd_pcm_format_t format) {
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static unsigned char capture_buf[AC108_FRAME_SIZE];
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/* set up the fixed parameters of pcm PCM hw_parmas */
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static int ac108_slave_hw_params_half(struct ac108_t *capture, unsigned int rate,snd_pcm_format_t format) {
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int err;
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snd_pcm_uframes_t bufferSize = rec->bufferSize;
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unsigned int latency = rec->latency;
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snd_pcm_uframes_t bufferSize = capture->bufferSize;
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unsigned int latency = capture->latency;
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unsigned int buffer_time = 0;
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unsigned int period_time = 0;
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if ((err = snd_pcm_hw_params_malloc(&rec->hw_params)) < 0) return err;
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if ((err = snd_pcm_hw_params_malloc(&capture->hw_params)) < 0) return err;
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if ((err = snd_pcm_hw_params_any(rec->slave, rec->hw_params)) < 0) {
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SNDERR("Cannot get slave hw_params");
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if ((err = snd_pcm_hw_params_any(capture->pcm, capture->hw_params)) < 0) {
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SNDERR("Cannot get pcm hw_params");
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goto out;
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}
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if ((err = snd_pcm_hw_params_set_access(rec->slave, rec->hw_params,
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if ((err = snd_pcm_hw_params_set_access(capture->pcm, capture->hw_params,
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SND_PCM_ACCESS_RW_INTERLEAVED)) < 0) {
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SNDERR("Cannot set slave access RW_INTERLEAVED");
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SNDERR("Cannot set pcm access RW_INTERLEAVED");
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goto out;
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}
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if ((err = snd_pcm_hw_params_set_channels(rec->slave, rec->hw_params, 2)) < 0) {
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SNDERR("Cannot set slave channels 2");
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if ((err = snd_pcm_hw_params_set_channels(capture->pcm, capture->hw_params, 2)) < 0) {
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SNDERR("Cannot set pcm channels 2");
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goto out;
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}
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if ((err = snd_pcm_hw_params_set_format(rec->slave, rec->hw_params,
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if ((err = snd_pcm_hw_params_set_format(capture->pcm, capture->hw_params,
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format)) < 0) {
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SNDERR("Cannot set slave format");
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SNDERR("Cannot set pcm format");
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goto out;
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}
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if ((err = snd_pcm_hw_params_set_rate(rec->slave, rec->hw_params, rate, 0)) < 0) {
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SNDERR("Cannot set slave rate %d", rate);
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if ((err = snd_pcm_hw_params_set_rate(capture->pcm, capture->hw_params, rate, 0)) < 0) {
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SNDERR("Cannot set pcm rate %d", rate);
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goto out;
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}
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err = snd_pcm_hw_params_get_buffer_time_max(rec->hw_params,
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err = snd_pcm_hw_params_get_buffer_time_max(capture->hw_params,
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&buffer_time, 0);
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if (buffer_time > 80000)
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buffer_time = 80000;
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period_time = buffer_time / 4;
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err = snd_pcm_hw_params_set_period_time_near(rec->slave, rec->hw_params,
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err = snd_pcm_hw_params_set_period_time_near(capture->pcm, capture->hw_params,
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&period_time, 0);
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if (err < 0) {
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fprintf(stderr,"Unable to set_period_time_near");
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goto out;
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}
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err = snd_pcm_hw_params_set_buffer_time_near(rec->slave, rec->hw_params,
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err = snd_pcm_hw_params_set_buffer_time_near(capture->pcm, capture->hw_params,
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&buffer_time, 0);
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if (err < 0) {
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fprintf(stderr,"Unable to set_buffer_time_near");
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goto out;
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}
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rec->bufferSize = bufferSize;
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rec->latency = latency;
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capture->bufferSize = bufferSize;
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capture->latency = latency;
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return 0;
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out:
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free(rec->hw_params);
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rec->hw_params = NULL;
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free(capture->hw_params);
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capture->hw_params = NULL;
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return err;
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}
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/*
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* start and stop callbacks - just trigger slave PCM
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* start and stop callbacks - just trigger pcm PCM
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*/
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static int ac108_start(snd_pcm_ioplug_t *io) {
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struct ac108_t *rec = io->private_data;
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struct ac108_t *capture = io->private_data;
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fprintf(stderr,"ac108_start: %d\n",io->buffer_size);
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if(!capture->pcm) {
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fprintf(stderr, "pcm is lost\n");
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}
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if(!rec->slave) {
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fprintf(stderr, "slave is lost\n");
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}
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return snd_pcm_start(rec->slave);
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return snd_pcm_start(capture->pcm);
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}
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static int ac108_stop(snd_pcm_ioplug_t *io) {
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struct ac108_t *rec = io->private_data;
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struct ac108_t *capture = io->private_data;
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fprintf(stderr,"ac108_stop!\n");
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return snd_pcm_drop(rec->slave);
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return snd_pcm_drop(capture->pcm);
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}
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/*
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* pointer callback
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*
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* Calculate the current position from the delay of slave PCM
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* Calculate the current position from the delay of pcm PCM
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*/
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static snd_pcm_sframes_t ac108_pointer(snd_pcm_ioplug_t *io) {
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struct ac108_t *rec = io->private_data;
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struct ac108_t *capture = io->private_data;
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int bps = snd_pcm_format_width(io->format) / 8;
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int err, size;
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assert(rec);
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assert(capture);
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size = snd_pcm_avail(rec->slave);
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if (size < 0) return size;
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size = size /2;
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if (size > rec->last_size) {
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rec->ptr += size - rec->last_size;
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rec->ptr %= io->buffer_size;
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size = snd_pcm_avail(capture->pcm);
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if (size < 0)
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return size;
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size = size/2;
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if (size > capture->last_size) {
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capture->ptr += size - capture->last_size;
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capture->ptr %= io->buffer_size;
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}
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rec->last_size = size;
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//fprintf(stderr, "%s :%d %d %d %d %d %d\n", __func__,capture->ptr ,capture->last_size,size, io->buffer_size,io->appl_ptr, io->hw_ptr);
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capture->last_size = size;
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//fprintf(stderr, "%s :%d %d %d %d\n", __func__, rec->ptr,size, io->appl_ptr, io->hw_ptr);
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return rec->ptr;
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return capture->ptr;
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}
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/*
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* transfer callback
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*/
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static snd_pcm_sframes_t ac108_transfer(snd_pcm_ioplug_t *io,
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const snd_pcm_channel_area_t *areas,
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snd_pcm_uframes_t offset,
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const snd_pcm_channel_area_t *dst_areas,
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snd_pcm_uframes_t dst_offset,
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snd_pcm_uframes_t size) {
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struct ac108_t *rec = io->private_data;
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char *buf;
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ssize_t result;
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int err;
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struct ac108_t *capture = io->private_data;
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int chn;
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unsigned char *dst_samples[io->channels];
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int dst_steps[io->channels];
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int bps = snd_pcm_format_width(io->format) / 8; /* bytes per sample */
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//int phys_bps = snd_pcm_format_physical_width(capture->format) / 8;
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//int big_endian = snd_pcm_format_big_endian(capture->format) == 1;
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//int to_unsigned = snd_pcm_format_unsigned(capture->format) == 1;
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//int is_float = (capture->format == SND_PCM_FORMAT_FLOAT_LE ||capture->format == SND_PCM_FORMAT_FLOAT_BE);
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int i;
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int count = 0;
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int err = 0;
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unsigned char *src_buf;
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unsigned char *src_data[4][4];
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memset(capture_buf,0,AC108_FRAME_SIZE);
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if(snd_pcm_avail(capture->pcm) > size*2){
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if ((err = snd_pcm_readi (capture->pcm, capture_buf, size*2)) != size*2) {
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fprintf (stderr, "read from audio interface failed %d %d %s!\n",size,err,snd_strerror (err));
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exit(EXIT_FAILURE);
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size = 0 ;
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}
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}else{
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size = 0;
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}
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#if 1
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/* verify and prepare the contents of areas */
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for (chn = 0; chn < io->channels; chn++) {
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if ((dst_areas[chn].first % 8) != 0) {
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fprintf(stderr,"dst_areas[%i].first == %i, aborting...\n", chn, dst_areas[chn].first);
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exit(EXIT_FAILURE);
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}
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dst_samples[chn] = /*(signed short *)*/(((unsigned char *)dst_areas[chn].addr) + (dst_areas[chn].first / 8));
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if ((dst_areas[chn].step % 16) != 0) {
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fprintf(stderr,"dst_areas[%i].step == %i, aborting...\n", chn, dst_areas[chn].step);
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exit(EXIT_FAILURE);
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}
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dst_steps[chn] = dst_areas[chn].step / 8;
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dst_samples[chn] += dst_offset * dst_steps[chn];
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}
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#endif
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//fprintf(stderr,"ac108_transfer: %d %d %d %d\n", size,dst_offset,io->channels,bps);
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// for(i = 0; i < size*2*bps;i++){
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// fprintf(stderr,"%x ",capture_buf[i]);
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// if(i%4 == 0)
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// fprintf(stderr,"\n");
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// }
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//generate_sine(dst_areas, dst_offset,size, &count);
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src_buf = capture_buf;
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// while(1){
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// if(src_buf[0] == 0 && src_buf[0 + bps] == 1 &&
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// src_buf[0 + 2*bps] == 2 && src_buf[0 + 3*bps] == 3)
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// break;
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// else
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// src_buf += 4*bps;
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// }
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#if 1
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while(count < size){
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for(chn = 0; chn < 4; chn++){
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for (i = 0; i < bps; i++){
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src_data[chn][i] = src_buf[i];
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}
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src_buf += bps ;
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}
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for(chn = 0; chn < io->channels; chn++){
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for (i = 0; i < bps; i++){
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*(dst_samples[chn] + i) = src_data[chn][i];
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//fprintf(stderr,"%x ",*(dst_samples[chn] + i));
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}
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//fprintf(stderr,"%x %x %x %x\n",src_buf[3],src_buf[2],src_buf[1],src_buf[0]);
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//fprintf(stderr,"\n");
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dst_samples[chn] += dst_steps[chn];
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}
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count++;
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}
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#endif
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capture->last_size -= size;
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#if 0
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/* we handle only an interleaved buffer */
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buf = (char *)areas->addr + (areas->first + areas->step * offset) / 8;
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result = snd_pcm_readi(rec->slave, buf, size*2);
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dst_buf = (char *)areas->addr + (areas->first + areas->step * offset) / 8;
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buf = dst_buf;
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snd_pcm_readi(capture->pcm, capture_buf, size/2);
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#if 1
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for(a = 0; a < size*2;a++){
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fprintf(stderr,"%x ",capture_buf[a]);
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if(a%4 == 0)
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fprintf(stderr,"\n");
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}
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#endif
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memcpy((char*)dst_buf,capture_buf,size/2);
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fprintf(stderr,"ac108_transfer: %d %d %d \n", size,offset,io->channels);
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if (result <= 0) {
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fprintf(stderr, "%s out error:%d %d\n", __func__, result);
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return result;
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}
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rec->last_size -= size;
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capture->last_size -= size;
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#endif
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return size;
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}
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/*
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* poll-related callbacks - just pass to slave PCM
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* poll-related callbacks - just pass to pcm PCM
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*/
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static int ac108_poll_descriptors_count(snd_pcm_ioplug_t *io) {
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struct ac108_t *rec = io->private_data;
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struct ac108_t *capture = io->private_data;
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//fprintf(stderr, "%s\n", __FUNCTION__);
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return snd_pcm_poll_descriptors_count(rec->slave);
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return snd_pcm_poll_descriptors_count(capture->pcm);
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}
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static int ac108_poll_descriptors(snd_pcm_ioplug_t *io, struct pollfd *pfd,
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unsigned int space) {
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struct ac108_t *rec = io->private_data;
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struct ac108_t *capture = io->private_data;
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//fprintf(stderr, "%s\n", __FUNCTION__);
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return snd_pcm_poll_descriptors(rec->slave, pfd, space);
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return snd_pcm_poll_descriptors(capture->pcm, pfd, space);
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}
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static int ac108_poll_revents(snd_pcm_ioplug_t *io, struct pollfd *pfd,
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unsigned int nfds, unsigned short *revents) {
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struct ac108_t *rec = io->private_data;
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struct ac108_t *capture = io->private_data;
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//fprintf(stderr, "%s\n", __FUNCTION__);
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return snd_pcm_poll_descriptors_revents(rec->slave, pfd, nfds, revents);
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return snd_pcm_poll_descriptors_revents(capture->pcm, pfd, nfds, revents);
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}
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/*
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* close callback
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*/
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static int ac108_close(snd_pcm_ioplug_t *io) {
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struct ac108_t *rec = io->private_data;
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struct ac108_t *capture = io->private_data;
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fprintf(stderr,"ac108_close\n");
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if (capture->pcm)
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snd_pcm_close(capture->pcm);
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if (rec->slave) return snd_pcm_close(rec->slave);
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return 0;
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}
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static int setSoftwareParams(struct ac108_t *rec) {
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static int setSoftwareParams(struct ac108_t *capture) {
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snd_pcm_sw_params_t *softwareParams;
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int err;
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@ -201,21 +299,21 @@ static int setSoftwareParams(struct ac108_t *rec) {
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snd_pcm_sw_params_alloca(&softwareParams);
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// Get the current software parameters
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err = snd_pcm_sw_params_current(rec->slave, softwareParams);
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err = snd_pcm_sw_params_current(capture->pcm, softwareParams);
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if (err < 0) {
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fprintf(stderr, "Unable to get software parameters: %s", snd_strerror(err));
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goto done;
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}
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// Configure ALSA to start the transfer when the buffer is almost full.
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snd_pcm_get_params(rec->slave, &bufferSize, &periodSize);
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snd_pcm_get_params(capture->pcm, &bufferSize, &periodSize);
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startThreshold = 1;
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stopThreshold = bufferSize;
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err = snd_pcm_sw_params_set_start_threshold(rec->slave, softwareParams,
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err = snd_pcm_sw_params_set_start_threshold(capture->pcm, softwareParams,
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startThreshold);
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if (err < 0) {
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fprintf(stderr, "Unable to set start threshold to %lu frames: %s",
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@ -223,7 +321,7 @@ static int setSoftwareParams(struct ac108_t *rec) {
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goto done;
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}
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err = snd_pcm_sw_params_set_stop_threshold(rec->slave, softwareParams,
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err = snd_pcm_sw_params_set_stop_threshold(capture->pcm, softwareParams,
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stopThreshold);
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if (err < 0) {
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fprintf(stderr, "Unable to set stop threshold to %lu frames: %s",
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@ -232,7 +330,7 @@ static int setSoftwareParams(struct ac108_t *rec) {
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}
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// Allow the transfer to start when at least periodSize samples can be
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// processed.
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err = snd_pcm_sw_params_set_avail_min(rec->slave, softwareParams,
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err = snd_pcm_sw_params_set_avail_min(capture->pcm, softwareParams,
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periodSize);
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if (err < 0) {
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fprintf(stderr, "Unable to configure available minimum to %lu: %s",
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@ -241,7 +339,7 @@ static int setSoftwareParams(struct ac108_t *rec) {
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}
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// Commit the software parameters back to the device.
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err = snd_pcm_sw_params(rec->slave, softwareParams);
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err = snd_pcm_sw_params(capture->pcm, softwareParams);
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if (err < 0) fprintf(stderr, "Unable to configure software parameters: %s",
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snd_strerror(err));
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@ -256,77 +354,71 @@ done:
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/*
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* hw_params callback
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*
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* Set up slave PCM according to the current parameters
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* Set up pcm PCM according to the current parameters
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*/
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//static int ac108_hw_params(snd_pcm_ioplug_t *io,
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// snd_pcm_hw_params_t *params ATTRIBUTE_UNUSED) {
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static int ac108_hw_params(snd_pcm_ioplug_t *io) {
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struct ac108_t *rec = io->private_data;
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struct ac108_t *capture = io->private_data;
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||||
snd_pcm_sw_params_t *sparams;
|
||||
snd_pcm_uframes_t period_size;
|
||||
snd_pcm_uframes_t buffer_size;
|
||||
int err;
|
||||
if (!rec->hw_params) {
|
||||
err = ac108_slave_hw_params_half(rec, 2*io->rate,io->format);
|
||||
if (!capture->hw_params) {
|
||||
err = ac108_slave_hw_params_half(capture, 2*io->rate,io->format);
|
||||
if (err < 0) {
|
||||
fprintf(stderr, "ac108_slave_hw_params_half error\n");
|
||||
return err;
|
||||
}
|
||||
}
|
||||
period_size = io->period_size;
|
||||
if ((err = snd_pcm_hw_params_set_period_size_near(rec->slave, rec->hw_params,
|
||||
if ((err = snd_pcm_hw_params_set_period_size_near(capture->pcm, capture->hw_params,
|
||||
&period_size, NULL)) < 0) {
|
||||
SNDERR("Cannot set slave period size %ld", period_size);
|
||||
SNDERR("Cannot set pcm period size %ld", period_size);
|
||||
return err;
|
||||
}
|
||||
buffer_size = io->buffer_size;
|
||||
if ((err = snd_pcm_hw_params_set_buffer_size_near(rec->slave, rec->hw_params,
|
||||
if ((err = snd_pcm_hw_params_set_buffer_size_near(capture->pcm, capture->hw_params,
|
||||
&buffer_size)) < 0) {
|
||||
SNDERR("Cannot set slave buffer size %ld", buffer_size);
|
||||
SNDERR("Cannot set pcm buffer size %ld", buffer_size);
|
||||
return err;
|
||||
}
|
||||
if ((err = snd_pcm_hw_params(rec->slave, rec->hw_params)) < 0) {
|
||||
SNDERR("Cannot set slave hw_params");
|
||||
if ((err = snd_pcm_hw_params(capture->pcm, capture->hw_params)) < 0) {
|
||||
SNDERR("Cannot set pcm hw_params");
|
||||
return err;
|
||||
}
|
||||
|
||||
setSoftwareParams(rec);
|
||||
|
||||
setSoftwareParams(capture);
|
||||
fprintf(stderr, "ac108_hw_params\n");
|
||||
return 0;
|
||||
}
|
||||
/*
|
||||
* hw_free callback
|
||||
*/
|
||||
static int ac108_hw_free(snd_pcm_ioplug_t *io) {
|
||||
struct ac108_t *rec = io->private_data;
|
||||
free(rec->hw_params);
|
||||
if (rec->buf != NULL) {
|
||||
free(rec->buf);
|
||||
rec->buf = NULL;
|
||||
}
|
||||
rec->hw_params = NULL;
|
||||
struct ac108_t *capture = io->private_data;
|
||||
free(capture->hw_params);
|
||||
capture->hw_params = NULL;
|
||||
fprintf(stderr,"ac108_hw_free\n");
|
||||
|
||||
return snd_pcm_hw_free(rec->slave);
|
||||
return snd_pcm_hw_free(capture->pcm);
|
||||
|
||||
}
|
||||
|
||||
|
||||
static int ac108_prepare(snd_pcm_ioplug_t *io) {
|
||||
struct ac108_t *rec = io->private_data;
|
||||
rec->ptr = 0;
|
||||
rec->last_size =0;
|
||||
if (rec->buf == NULL) {
|
||||
rec->buf = malloc(io->buffer_size);
|
||||
}
|
||||
|
||||
return snd_pcm_prepare(rec->slave);
|
||||
struct ac108_t *capture = io->private_data;
|
||||
capture->ptr = 0;
|
||||
capture->last_size =0;
|
||||
fprintf(stderr,"ac108_prepare\n");
|
||||
return snd_pcm_prepare(capture->pcm);
|
||||
}
|
||||
static int ac108_drain(snd_pcm_ioplug_t *io) {
|
||||
struct ac108_t *rec = io->private_data;
|
||||
return snd_pcm_drain(rec->slave);
|
||||
struct ac108_t *capture = io->private_data;
|
||||
|
||||
return snd_pcm_drain(capture->pcm);
|
||||
}
|
||||
static int ac108_sw_params(snd_pcm_ioplug_t *io, snd_pcm_sw_params_t *params) {
|
||||
struct ac108_t *rec = io->private_data;
|
||||
struct ac108_t *capture = io->private_data;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
|
@ -356,10 +448,9 @@ static snd_pcm_ioplug_callback_t a108_ops = {
|
|||
};
|
||||
|
||||
|
||||
static int ac108_set_hw_constraint(struct ac108_t *rec) {
|
||||
static int ac108_set_hw_constraint(struct ac108_t *capture) {
|
||||
static unsigned int accesses[] = {
|
||||
SND_PCM_ACCESS_RW_INTERLEAVED,
|
||||
SND_PCM_ACCESS_RW_NONINTERLEAVED
|
||||
SND_PCM_ACCESS_RW_INTERLEAVED
|
||||
};
|
||||
unsigned int formats[] = { SND_PCM_FORMAT_S32,
|
||||
SND_PCM_FORMAT_S16 };
|
||||
|
|
@ -374,30 +465,43 @@ static int ac108_set_hw_constraint(struct ac108_t *rec) {
|
|||
unsigned int period_bytes, max_periods;
|
||||
|
||||
|
||||
err = snd_pcm_ioplug_set_param_list(&rec->io,
|
||||
err = snd_pcm_ioplug_set_param_list(&capture->io,
|
||||
SND_PCM_IOPLUG_HW_ACCESS,
|
||||
ARRAY_SIZE(accesses),
|
||||
accesses);
|
||||
if (err < 0) return err;
|
||||
if (err < 0){
|
||||
SNDERR("ioplug cannot set ac108 hw access");
|
||||
return err;
|
||||
}
|
||||
|
||||
if ((err = snd_pcm_ioplug_set_param_list(&rec->io, SND_PCM_IOPLUG_HW_FORMAT,
|
||||
if ((err = snd_pcm_ioplug_set_param_list(&capture->io, SND_PCM_IOPLUG_HW_FORMAT,
|
||||
ARRAY_SIZE(formats), formats)) < 0 ||
|
||||
(err = snd_pcm_ioplug_set_param_minmax(&rec->io, SND_PCM_IOPLUG_HW_CHANNELS,
|
||||
4, 4)) < 0 ||
|
||||
(err = snd_pcm_ioplug_set_param_list(&rec->io, SND_PCM_IOPLUG_HW_RATE,
|
||||
ARRAY_SIZE(rates), rates)) < 0) return err;
|
||||
err = snd_pcm_ioplug_set_param_minmax(&rec->io,
|
||||
SND_PCM_IOPLUG_HW_BUFFER_BYTES,
|
||||
(err = snd_pcm_ioplug_set_param_minmax(&capture->io, SND_PCM_IOPLUG_HW_CHANNELS,
|
||||
1, 4)) < 0 ||
|
||||
(err = snd_pcm_ioplug_set_param_list(&capture->io, SND_PCM_IOPLUG_HW_RATE,
|
||||
ARRAY_SIZE(rates), rates)) < 0) {
|
||||
SNDERR("ioplug cannot set ac108 format channel rate!");
|
||||
return err;
|
||||
}
|
||||
err = snd_pcm_ioplug_set_param_minmax(&capture->io,SND_PCM_IOPLUG_HW_BUFFER_BYTES,
|
||||
1, 4 * 1024 * 1024);
|
||||
if (err < 0) return err;
|
||||
if (err < 0){
|
||||
SNDERR("ioplug cannot set ac108 hw buffer bytes");
|
||||
return err;
|
||||
}
|
||||
|
||||
err = snd_pcm_ioplug_set_param_minmax(&rec->io,
|
||||
SND_PCM_IOPLUG_HW_PERIOD_BYTES,
|
||||
err = snd_pcm_ioplug_set_param_minmax(&capture->io,SND_PCM_IOPLUG_HW_PERIOD_BYTES,
|
||||
128, 2 * 1024 * 1024);
|
||||
if (err < 0) return err;
|
||||
if (err < 0) {
|
||||
SNDERR("ioplug cannot set ac108 hw period bytes");
|
||||
return err;
|
||||
}
|
||||
|
||||
err = snd_pcm_ioplug_set_param_minmax(&rec->io, SND_PCM_IOPLUG_HW_PERIODS,
|
||||
3, 1024);
|
||||
err = snd_pcm_ioplug_set_param_minmax(&capture->io, SND_PCM_IOPLUG_HW_PERIODS,3, 1024);
|
||||
if (err < 0) {
|
||||
SNDERR("ioplug cannot set ac108 hw periods");
|
||||
return err;
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
|
@ -412,7 +516,7 @@ SND_PCM_PLUGIN_DEFINE_FUNC(ac108) {
|
|||
const char *pcm_string = NULL;
|
||||
snd_pcm_format_t format = SND_PCM_FORMAT_S32_LE;
|
||||
char devstr[128], tmpcard[8];
|
||||
struct ac108_t *rec;
|
||||
struct ac108_t *capture;
|
||||
int channels;
|
||||
struct pollfd fds;
|
||||
if (stream != SND_PCM_STREAM_CAPTURE) {
|
||||
|
|
@ -449,36 +553,37 @@ SND_PCM_PLUGIN_DEFINE_FUNC(ac108) {
|
|||
}
|
||||
}
|
||||
|
||||
rec = calloc(1, sizeof(*rec));
|
||||
if (!rec) {
|
||||
|
||||
capture = calloc(1, sizeof(*capture));
|
||||
if (!capture) {
|
||||
SNDERR("cannot allocate");
|
||||
return -ENOMEM;
|
||||
}
|
||||
err = snd_pcm_open(&rec->slave, pcm_string, stream, mode);
|
||||
err = snd_pcm_open(&capture->pcm, pcm_string, stream, mode);
|
||||
if (err < 0) goto error;
|
||||
|
||||
|
||||
|
||||
//SND_PCM_NONBLOCK
|
||||
rec->io.version = SND_PCM_IOPLUG_VERSION;
|
||||
rec->io.name = "AC108 decode Plugin";
|
||||
rec->io.mmap_rw = 0;
|
||||
rec->io.callback = &a108_ops;
|
||||
rec->io.private_data = rec;
|
||||
capture->io.version = SND_PCM_IOPLUG_VERSION;
|
||||
capture->io.name = "AC108 decode Plugin";
|
||||
capture->io.mmap_rw = 0;
|
||||
capture->io.callback = &a108_ops;
|
||||
capture->io.private_data = capture;
|
||||
|
||||
err = snd_pcm_ioplug_create(&rec->io, name, stream, mode);
|
||||
err = snd_pcm_ioplug_create(&capture->io, name, stream, mode);
|
||||
if (err < 0) goto error;
|
||||
|
||||
if ((err = ac108_set_hw_constraint(rec)) < 0) {
|
||||
snd_pcm_ioplug_delete(&rec->io);
|
||||
if ((err = ac108_set_hw_constraint(capture)) < 0) {
|
||||
snd_pcm_ioplug_delete(&capture->io);
|
||||
return err;
|
||||
}
|
||||
*pcmp = rec->io.pcm;
|
||||
*pcmp = capture->io.pcm;
|
||||
return 0;
|
||||
|
||||
error:
|
||||
if (rec->slave) snd_pcm_close(rec->slave);
|
||||
free(rec);
|
||||
if (capture->pcm) snd_pcm_close(capture->pcm);
|
||||
free(capture);
|
||||
return err;
|
||||
}
|
||||
|
||||
|
|
|
|||
Loading…
Reference in a new issue