From f362cdd383561e73a3b47600eb357c126a23e091 Mon Sep 17 00:00:00 2001 From: Baozhu Zuo Date: Sat, 30 Sep 2017 16:00:07 +0800 Subject: [PATCH] enable chosen single channel --- ac108_plugin/pcm_ac108.c | 393 +++++++++++++++++++++++++-------------- 1 file changed, 249 insertions(+), 144 deletions(-) diff --git a/ac108_plugin/pcm_ac108.c b/ac108_plugin/pcm_ac108.c index 5d7a19f..bd4d6b4 100644 --- a/ac108_plugin/pcm_ac108.c +++ b/ac108_plugin/pcm_ac108.c @@ -5,193 +5,291 @@ #include #include #include - +#include "ac108_help.h" #include #define ARRAY_SIZE(ary) (sizeof(ary)/sizeof(ary[0])) #define AC108_FRAME_SIZE 4096 struct ac108_t { snd_pcm_ioplug_t io; - snd_pcm_t *slave; + snd_pcm_t *pcm; snd_pcm_hw_params_t *hw_params; unsigned int last_size; unsigned int ptr; - void *buf; unsigned int latency; // Delay in usec unsigned int bufferSize; // Size of sample buffer }; - -/* set up the fixed parameters of slave PCM hw_parmas */ -static int ac108_slave_hw_params_half(struct ac108_t *rec, unsigned int rate,snd_pcm_format_t format) { +static unsigned char capture_buf[AC108_FRAME_SIZE]; +/* set up the fixed parameters of pcm PCM hw_parmas */ +static int ac108_slave_hw_params_half(struct ac108_t *capture, unsigned int rate,snd_pcm_format_t format) { int err; - snd_pcm_uframes_t bufferSize = rec->bufferSize; - unsigned int latency = rec->latency; + snd_pcm_uframes_t bufferSize = capture->bufferSize; + unsigned int latency = capture->latency; unsigned int buffer_time = 0; unsigned int period_time = 0; - if ((err = snd_pcm_hw_params_malloc(&rec->hw_params)) < 0) return err; + if ((err = snd_pcm_hw_params_malloc(&capture->hw_params)) < 0) return err; - if ((err = snd_pcm_hw_params_any(rec->slave, rec->hw_params)) < 0) { - SNDERR("Cannot get slave hw_params"); + if ((err = snd_pcm_hw_params_any(capture->pcm, capture->hw_params)) < 0) { + SNDERR("Cannot get pcm hw_params"); goto out; } - if ((err = snd_pcm_hw_params_set_access(rec->slave, rec->hw_params, + if ((err = snd_pcm_hw_params_set_access(capture->pcm, capture->hw_params, SND_PCM_ACCESS_RW_INTERLEAVED)) < 0) { - SNDERR("Cannot set slave access RW_INTERLEAVED"); + SNDERR("Cannot set pcm access RW_INTERLEAVED"); goto out; } - if ((err = snd_pcm_hw_params_set_channels(rec->slave, rec->hw_params, 2)) < 0) { - SNDERR("Cannot set slave channels 2"); + if ((err = snd_pcm_hw_params_set_channels(capture->pcm, capture->hw_params, 2)) < 0) { + SNDERR("Cannot set pcm channels 2"); goto out; } - if ((err = snd_pcm_hw_params_set_format(rec->slave, rec->hw_params, + if ((err = snd_pcm_hw_params_set_format(capture->pcm, capture->hw_params, format)) < 0) { - SNDERR("Cannot set slave format"); + SNDERR("Cannot set pcm format"); goto out; } - if ((err = snd_pcm_hw_params_set_rate(rec->slave, rec->hw_params, rate, 0)) < 0) { - SNDERR("Cannot set slave rate %d", rate); + if ((err = snd_pcm_hw_params_set_rate(capture->pcm, capture->hw_params, rate, 0)) < 0) { + SNDERR("Cannot set pcm rate %d", rate); goto out; } - err = snd_pcm_hw_params_get_buffer_time_max(rec->hw_params, + err = snd_pcm_hw_params_get_buffer_time_max(capture->hw_params, &buffer_time, 0); if (buffer_time > 80000) buffer_time = 80000; period_time = buffer_time / 4; - err = snd_pcm_hw_params_set_period_time_near(rec->slave, rec->hw_params, + err = snd_pcm_hw_params_set_period_time_near(capture->pcm, capture->hw_params, &period_time, 0); if (err < 0) { fprintf(stderr,"Unable to set_period_time_near"); goto out; } - err = snd_pcm_hw_params_set_buffer_time_near(rec->slave, rec->hw_params, + err = snd_pcm_hw_params_set_buffer_time_near(capture->pcm, capture->hw_params, &buffer_time, 0); if (err < 0) { fprintf(stderr,"Unable to set_buffer_time_near"); goto out; } - rec->bufferSize = bufferSize; - rec->latency = latency; + capture->bufferSize = bufferSize; + capture->latency = latency; return 0; out: - free(rec->hw_params); - rec->hw_params = NULL; + free(capture->hw_params); + capture->hw_params = NULL; return err; } /* - * start and stop callbacks - just trigger slave PCM + * start and stop callbacks - just trigger pcm PCM */ static int ac108_start(snd_pcm_ioplug_t *io) { - struct ac108_t *rec = io->private_data; + struct ac108_t *capture = io->private_data; + fprintf(stderr,"ac108_start: %d\n",io->buffer_size); + if(!capture->pcm) { + fprintf(stderr, "pcm is lost\n"); + } - if(!rec->slave) { - fprintf(stderr, "slave is lost\n"); - } - - return snd_pcm_start(rec->slave); + return snd_pcm_start(capture->pcm); } static int ac108_stop(snd_pcm_ioplug_t *io) { - struct ac108_t *rec = io->private_data; + struct ac108_t *capture = io->private_data; + fprintf(stderr,"ac108_stop!\n"); - return snd_pcm_drop(rec->slave); + return snd_pcm_drop(capture->pcm); } /* * pointer callback * - * Calculate the current position from the delay of slave PCM + * Calculate the current position from the delay of pcm PCM */ static snd_pcm_sframes_t ac108_pointer(snd_pcm_ioplug_t *io) { - struct ac108_t *rec = io->private_data; + + struct ac108_t *capture = io->private_data; + int bps = snd_pcm_format_width(io->format) / 8; int err, size; - - assert(rec); + + assert(capture); - size = snd_pcm_avail(rec->slave); - if (size < 0) return size; - size = size /2; - if (size > rec->last_size) { - rec->ptr += size - rec->last_size; - rec->ptr %= io->buffer_size; + size = snd_pcm_avail(capture->pcm); + if (size < 0) + return size; + + size = size/2; + + if (size > capture->last_size) { + capture->ptr += size - capture->last_size; + capture->ptr %= io->buffer_size; } - rec->last_size = size; - - //fprintf(stderr, "%s :%d %d %d %d\n", __func__, rec->ptr,size, io->appl_ptr, io->hw_ptr); - return rec->ptr; + //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); + capture->last_size = size; + + return capture->ptr; } /* * transfer callback */ static snd_pcm_sframes_t ac108_transfer(snd_pcm_ioplug_t *io, - const snd_pcm_channel_area_t *areas, - snd_pcm_uframes_t offset, + const snd_pcm_channel_area_t *dst_areas, + snd_pcm_uframes_t dst_offset, snd_pcm_uframes_t size) { - struct ac108_t *rec = io->private_data; - char *buf; - ssize_t result; - int err; + struct ac108_t *capture = io->private_data; + int chn; + unsigned char *dst_samples[io->channels]; + int dst_steps[io->channels]; + int bps = snd_pcm_format_width(io->format) / 8; /* bytes per sample */ + //int phys_bps = snd_pcm_format_physical_width(capture->format) / 8; + //int big_endian = snd_pcm_format_big_endian(capture->format) == 1; + //int to_unsigned = snd_pcm_format_unsigned(capture->format) == 1; + //int is_float = (capture->format == SND_PCM_FORMAT_FLOAT_LE ||capture->format == SND_PCM_FORMAT_FLOAT_BE); + int i; + int count = 0; + int err = 0; + unsigned char *src_buf; + unsigned char *src_data[4][4]; + + memset(capture_buf,0,AC108_FRAME_SIZE); + if(snd_pcm_avail(capture->pcm) > size*2){ + if ((err = snd_pcm_readi (capture->pcm, capture_buf, size*2)) != size*2) { + fprintf (stderr, "read from audio interface failed %d %d %s!\n",size,err,snd_strerror (err)); + exit(EXIT_FAILURE); + size = 0 ; + } + }else{ + size = 0; + } +#if 1 + /* verify and prepare the contents of areas */ + for (chn = 0; chn < io->channels; chn++) { + if ((dst_areas[chn].first % 8) != 0) { + fprintf(stderr,"dst_areas[%i].first == %i, aborting...\n", chn, dst_areas[chn].first); + exit(EXIT_FAILURE); + } + dst_samples[chn] = /*(signed short *)*/(((unsigned char *)dst_areas[chn].addr) + (dst_areas[chn].first / 8)); + if ((dst_areas[chn].step % 16) != 0) { + fprintf(stderr,"dst_areas[%i].step == %i, aborting...\n", chn, dst_areas[chn].step); + exit(EXIT_FAILURE); + } + dst_steps[chn] = dst_areas[chn].step / 8; + dst_samples[chn] += dst_offset * dst_steps[chn]; + } +#endif + //fprintf(stderr,"ac108_transfer: %d %d %d %d\n", size,dst_offset,io->channels,bps); + + // for(i = 0; i < size*2*bps;i++){ + // fprintf(stderr,"%x ",capture_buf[i]); + // if(i%4 == 0) + // fprintf(stderr,"\n"); + // } + + //generate_sine(dst_areas, dst_offset,size, &count); + src_buf = capture_buf; + // while(1){ + // if(src_buf[0] == 0 && src_buf[0 + bps] == 1 && + // src_buf[0 + 2*bps] == 2 && src_buf[0 + 3*bps] == 3) + // break; + // else + // src_buf += 4*bps; + // } +#if 1 + while(count < size){ + for(chn = 0; chn < 4; chn++){ + for (i = 0; i < bps; i++){ + src_data[chn][i] = src_buf[i]; + } + src_buf += bps ; + } + + for(chn = 0; chn < io->channels; chn++){ + for (i = 0; i < bps; i++){ + *(dst_samples[chn] + i) = src_data[chn][i]; + //fprintf(stderr,"%x ",*(dst_samples[chn] + i)); + } + //fprintf(stderr,"%x %x %x %x\n",src_buf[3],src_buf[2],src_buf[1],src_buf[0]); + //fprintf(stderr,"\n"); + dst_samples[chn] += dst_steps[chn]; + } + count++; + } + +#endif + + capture->last_size -= size; + +#if 0 /* we handle only an interleaved buffer */ - buf = (char *)areas->addr + (areas->first + areas->step * offset) / 8; - result = snd_pcm_readi(rec->slave, buf, size*2); + dst_buf = (char *)areas->addr + (areas->first + areas->step * offset) / 8; + buf = dst_buf; + + snd_pcm_readi(capture->pcm, capture_buf, size/2); +#if 1 + for(a = 0; a < size*2;a++){ + fprintf(stderr,"%x ",capture_buf[a]); + if(a%4 == 0) + fprintf(stderr,"\n"); + } +#endif + memcpy((char*)dst_buf,capture_buf,size/2); + + fprintf(stderr,"ac108_transfer: %d %d %d \n", size,offset,io->channels); + if (result <= 0) { fprintf(stderr, "%s out error:%d %d\n", __func__, result); return result; } - rec->last_size -= size; - - + capture->last_size -= size; +#endif return size; - } /* - * poll-related callbacks - just pass to slave PCM + * poll-related callbacks - just pass to pcm PCM */ static int ac108_poll_descriptors_count(snd_pcm_ioplug_t *io) { - struct ac108_t *rec = io->private_data; + struct ac108_t *capture = io->private_data; //fprintf(stderr, "%s\n", __FUNCTION__); - return snd_pcm_poll_descriptors_count(rec->slave); + return snd_pcm_poll_descriptors_count(capture->pcm); } static int ac108_poll_descriptors(snd_pcm_ioplug_t *io, struct pollfd *pfd, unsigned int space) { - struct ac108_t *rec = io->private_data; + struct ac108_t *capture = io->private_data; //fprintf(stderr, "%s\n", __FUNCTION__); - return snd_pcm_poll_descriptors(rec->slave, pfd, space); + return snd_pcm_poll_descriptors(capture->pcm, pfd, space); } static int ac108_poll_revents(snd_pcm_ioplug_t *io, struct pollfd *pfd, unsigned int nfds, unsigned short *revents) { - struct ac108_t *rec = io->private_data; + struct ac108_t *capture = io->private_data; //fprintf(stderr, "%s\n", __FUNCTION__); - return snd_pcm_poll_descriptors_revents(rec->slave, pfd, nfds, revents); + return snd_pcm_poll_descriptors_revents(capture->pcm, pfd, nfds, revents); } /* * close callback */ static int ac108_close(snd_pcm_ioplug_t *io) { - struct ac108_t *rec = io->private_data; + struct ac108_t *capture = io->private_data; + fprintf(stderr,"ac108_close\n"); + if (capture->pcm) + snd_pcm_close(capture->pcm); - if (rec->slave) return snd_pcm_close(rec->slave); return 0; } -static int setSoftwareParams(struct ac108_t *rec) { +static int setSoftwareParams(struct ac108_t *capture) { snd_pcm_sw_params_t *softwareParams; int err; @@ -201,21 +299,21 @@ static int setSoftwareParams(struct ac108_t *rec) { snd_pcm_sw_params_alloca(&softwareParams); // Get the current software parameters - err = snd_pcm_sw_params_current(rec->slave, softwareParams); + err = snd_pcm_sw_params_current(capture->pcm, softwareParams); if (err < 0) { fprintf(stderr, "Unable to get software parameters: %s", snd_strerror(err)); goto done; } // Configure ALSA to start the transfer when the buffer is almost full. - snd_pcm_get_params(rec->slave, &bufferSize, &periodSize); + snd_pcm_get_params(capture->pcm, &bufferSize, &periodSize); startThreshold = 1; stopThreshold = bufferSize; - err = snd_pcm_sw_params_set_start_threshold(rec->slave, softwareParams, + err = snd_pcm_sw_params_set_start_threshold(capture->pcm, softwareParams, startThreshold); if (err < 0) { fprintf(stderr, "Unable to set start threshold to %lu frames: %s", @@ -223,7 +321,7 @@ static int setSoftwareParams(struct ac108_t *rec) { goto done; } - err = snd_pcm_sw_params_set_stop_threshold(rec->slave, softwareParams, + err = snd_pcm_sw_params_set_stop_threshold(capture->pcm, softwareParams, stopThreshold); if (err < 0) { fprintf(stderr, "Unable to set stop threshold to %lu frames: %s", @@ -232,7 +330,7 @@ static int setSoftwareParams(struct ac108_t *rec) { } // Allow the transfer to start when at least periodSize samples can be // processed. - err = snd_pcm_sw_params_set_avail_min(rec->slave, softwareParams, + err = snd_pcm_sw_params_set_avail_min(capture->pcm, softwareParams, periodSize); if (err < 0) { fprintf(stderr, "Unable to configure available minimum to %lu: %s", @@ -241,7 +339,7 @@ static int setSoftwareParams(struct ac108_t *rec) { } // Commit the software parameters back to the device. - err = snd_pcm_sw_params(rec->slave, softwareParams); + err = snd_pcm_sw_params(capture->pcm, softwareParams); if (err < 0) fprintf(stderr, "Unable to configure software parameters: %s", snd_strerror(err)); @@ -256,77 +354,71 @@ done: /* * hw_params callback * - * Set up slave PCM according to the current parameters + * Set up pcm PCM according to the current parameters */ //static int ac108_hw_params(snd_pcm_ioplug_t *io, // snd_pcm_hw_params_t *params ATTRIBUTE_UNUSED) { static int ac108_hw_params(snd_pcm_ioplug_t *io) { - struct ac108_t *rec = io->private_data; + struct ac108_t *capture = io->private_data; 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; - - return snd_pcm_hw_free(rec->slave); + 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(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; }