diff options
Diffstat (limited to 'drivers/staging/media/easycap/easycap_sound.c')
| -rw-r--r-- | drivers/staging/media/easycap/easycap_sound.c | 750 |
1 files changed, 0 insertions, 750 deletions
diff --git a/drivers/staging/media/easycap/easycap_sound.c b/drivers/staging/media/easycap/easycap_sound.c deleted file mode 100644 index 8c8bcae8ded8..000000000000 --- a/drivers/staging/media/easycap/easycap_sound.c +++ /dev/null @@ -1,750 +0,0 @@ -/****************************************************************************** -* * -* easycap_sound.c * -* * -* Audio driver for EasyCAP USB2.0 Video Capture Device DC60 * -* * -* * -******************************************************************************/ -/* - * - * Copyright (C) 2010 R.M. Thomas <rmthomas@sciolus.org> - * - * - * This is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * The software is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this software; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - * -*/ -/*****************************************************************************/ - -#include "easycap.h" - -/*--------------------------------------------------------------------------*/ -/* - * PARAMETERS USED WHEN REGISTERING THE AUDIO INTERFACE - */ -/*--------------------------------------------------------------------------*/ -static const struct snd_pcm_hardware alsa_hardware = { - .info = SNDRV_PCM_INFO_BLOCK_TRANSFER | - SNDRV_PCM_INFO_MMAP | - SNDRV_PCM_INFO_INTERLEAVED | - SNDRV_PCM_INFO_MMAP_VALID, - .formats = SNDRV_PCM_FMTBIT_S16_LE, - .rates = SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_48000, - .rate_min = 32000, - .rate_max = 48000, - .channels_min = 2, - .channels_max = 2, - .buffer_bytes_max = PAGE_SIZE * - PAGES_PER_AUDIO_FRAGMENT * - AUDIO_FRAGMENT_MANY, - .period_bytes_min = PAGE_SIZE * PAGES_PER_AUDIO_FRAGMENT, - .period_bytes_max = PAGE_SIZE * PAGES_PER_AUDIO_FRAGMENT * 2, - .periods_min = AUDIO_FRAGMENT_MANY, - .periods_max = AUDIO_FRAGMENT_MANY * 2, -}; - - -/*---------------------------------------------------------------------------*/ -/* - * SUBMIT ALL AUDIO URBS. - */ -/*---------------------------------------------------------------------------*/ -static int easycap_audio_submit_urbs(struct easycap *peasycap) -{ - struct data_urb *pdata_urb; - struct urb *purb; - struct list_head *plist_head; - int j, isbad, nospc, m, rc; - int isbuf; - - if (!peasycap->purb_audio_head) { - SAM("ERROR: peasycap->urb_audio_head uninitialized\n"); - return -EFAULT; - } - if (!peasycap->pusb_device) { - SAM("ERROR: peasycap->pusb_device is NULL\n"); - return -EFAULT; - } - - if (peasycap->audio_isoc_streaming) { - JOM(4, "already streaming audio urbs\n"); - return 0; - } - - JOM(4, "initial submission of all audio urbs\n"); - rc = usb_set_interface(peasycap->pusb_device, - peasycap->audio_interface, - peasycap->audio_altsetting_on); - JOM(8, "usb_set_interface(.,%i,%i) returned %i\n", - peasycap->audio_interface, - peasycap->audio_altsetting_on, rc); - - isbad = 0; - nospc = 0; - m = 0; - list_for_each(plist_head, peasycap->purb_audio_head) { - pdata_urb = list_entry(plist_head, struct data_urb, list_head); - if (pdata_urb && pdata_urb->purb) { - purb = pdata_urb->purb; - isbuf = pdata_urb->isbuf; - - purb->interval = 1; - purb->dev = peasycap->pusb_device; - purb->pipe = usb_rcvisocpipe(peasycap->pusb_device, - peasycap->audio_endpointnumber); - purb->transfer_flags = URB_ISO_ASAP; - purb->transfer_buffer = peasycap->audio_isoc_buffer[isbuf].pgo; - purb->transfer_buffer_length = peasycap->audio_isoc_buffer_size; - purb->complete = easycap_alsa_complete; - purb->context = peasycap; - purb->start_frame = 0; - purb->number_of_packets = peasycap->audio_isoc_framesperdesc; - for (j = 0; j < peasycap->audio_isoc_framesperdesc; j++) { - purb->iso_frame_desc[j].offset = j * peasycap->audio_isoc_maxframesize; - purb->iso_frame_desc[j].length = peasycap->audio_isoc_maxframesize; - } - - rc = usb_submit_urb(purb, GFP_KERNEL); - if (rc) { - isbad++; - SAM("ERROR: usb_submit_urb() failed" - " for urb with rc: -%s: %d\n", - strerror(rc), rc); - } else { - m++; - } - } else { - isbad++; - } - } - if (nospc) { - SAM("-ENOSPC=usb_submit_urb() for %i urbs\n", nospc); - SAM("..... possibly inadequate USB bandwidth\n"); - peasycap->audio_eof = 1; - } - - if (isbad) - easycap_audio_kill_urbs(peasycap); - else - peasycap->audio_isoc_streaming = m; - - return 0; -} -/*---------------------------------------------------------------------------*/ -/* - * COMMON AUDIO INITIALIZATION - */ -/*---------------------------------------------------------------------------*/ -static int easycap_sound_setup(struct easycap *peasycap) -{ - int rc; - - JOM(4, "starting initialization\n"); - - if (!peasycap) { - SAY("ERROR: peasycap is NULL.\n"); - return -EFAULT; - } - if (!peasycap->pusb_device) { - SAM("ERROR: peasycap->pusb_device is NULL\n"); - return -ENODEV; - } - JOM(16, "0x%08lX=peasycap->pusb_device\n", (long int)peasycap->pusb_device); - - rc = easycap_audio_setup(peasycap); - JOM(8, "audio_setup() returned %i\n", rc); - - if (!peasycap->pusb_device) { - SAM("ERROR: peasycap->pusb_device has become NULL\n"); - return -ENODEV; - } -/*---------------------------------------------------------------------------*/ - if (!peasycap->pusb_device) { - SAM("ERROR: peasycap->pusb_device has become NULL\n"); - return -ENODEV; - } - rc = usb_set_interface(peasycap->pusb_device, peasycap->audio_interface, - peasycap->audio_altsetting_on); - JOM(8, "usb_set_interface(.,%i,%i) returned %i\n", peasycap->audio_interface, - peasycap->audio_altsetting_on, rc); - - rc = easycap_wakeup_device(peasycap->pusb_device); - JOM(8, "wakeup_device() returned %i\n", rc); - - peasycap->audio_eof = 0; - peasycap->audio_idle = 0; - - easycap_audio_submit_urbs(peasycap); - - JOM(4, "finished initialization\n"); - return 0; -} -/*****************************************************************************/ -/*---------------------------------------------------------------------------*/ -/* - * ON COMPLETION OF AN AUDIO URB ITS DATA IS COPIED TO THE DAM BUFFER - * PROVIDED peasycap->audio_idle IS ZERO. REGARDLESS OF THIS BEING TRUE, - * IT IS RESUBMITTED PROVIDED peasycap->audio_isoc_streaming IS NOT ZERO. - */ -/*---------------------------------------------------------------------------*/ -void easycap_alsa_complete(struct urb *purb) -{ - struct easycap *peasycap; - struct snd_pcm_substream *pss; - struct snd_pcm_runtime *prt; - int dma_bytes, fragment_bytes; - int isfragment; - u8 *p1, *p2; - s16 tmp; - int i, j, more, much, rc; -#ifdef UPSAMPLE - int k; - s16 oldaudio, newaudio, delta; -#endif /*UPSAMPLE*/ - - JOT(16, "\n"); - - if (!purb) { - SAY("ERROR: purb is NULL\n"); - return; - } - peasycap = purb->context; - if (!peasycap) { - SAY("ERROR: peasycap is NULL\n"); - return; - } - much = 0; - if (peasycap->audio_idle) { - JOM(16, "%i=audio_idle %i=audio_isoc_streaming\n", - peasycap->audio_idle, peasycap->audio_isoc_streaming); - if (peasycap->audio_isoc_streaming) - goto resubmit; - } -/*---------------------------------------------------------------------------*/ - pss = peasycap->psubstream; - if (!pss) - goto resubmit; - prt = pss->runtime; - if (!prt) - goto resubmit; - dma_bytes = (int)prt->dma_bytes; - if (0 == dma_bytes) - goto resubmit; - fragment_bytes = 4 * ((int)prt->period_size); - if (0 == fragment_bytes) - goto resubmit; -/* -------------------------------------------------------------------------*/ - if (purb->status) { - if ((-ESHUTDOWN == purb->status) || (-ENOENT == purb->status)) { - JOM(16, "urb status -ESHUTDOWN or -ENOENT\n"); - return; - } - SAM("ERROR: non-zero urb status: -%s: %d\n", - strerror(purb->status), purb->status); - goto resubmit; - } -/*---------------------------------------------------------------------------*/ -/* - * PROCEED HERE WHEN NO ERROR - */ -/*---------------------------------------------------------------------------*/ - -#ifdef UPSAMPLE - oldaudio = peasycap->oldaudio; -#endif /*UPSAMPLE*/ - - for (i = 0; i < purb->number_of_packets; i++) { - if (purb->iso_frame_desc[i].status < 0) { - SAM("-%s: %d\n", - strerror(purb->iso_frame_desc[i].status), - purb->iso_frame_desc[i].status); - } - if (purb->iso_frame_desc[i].status) { - JOM(12, "discarding audio samples because " - "%i=purb->iso_frame_desc[i].status\n", - purb->iso_frame_desc[i].status); - continue; - } - more = purb->iso_frame_desc[i].actual_length; - if (more == 0) { - peasycap->audio_mt++; - continue; - } - if (0 > more) { - SAM("MISTAKE: more is negative\n"); - return; - } - - if (peasycap->audio_mt) { - JOM(12, "%4i empty audio urb frames\n", - peasycap->audio_mt); - peasycap->audio_mt = 0; - } - - p1 = (u8 *)(purb->transfer_buffer + - purb->iso_frame_desc[i].offset); - - /* - * COPY more BYTES FROM ISOC BUFFER - * TO THE DMA BUFFER, CONVERTING - * 8-BIT MONO TO 16-BIT SIGNED - * LITTLE-ENDIAN SAMPLES IF NECESSARY - */ - while (more) { - much = dma_bytes - peasycap->dma_fill; - if (0 > much) { - SAM("MISTAKE: much is negative\n"); - return; - } - if (0 == much) { - peasycap->dma_fill = 0; - peasycap->dma_next = fragment_bytes; - JOM(8, "wrapped dma buffer\n"); - } - if (!peasycap->microphone) { - if (much > more) - much = more; - memcpy(prt->dma_area + peasycap->dma_fill, - p1, much); - p1 += much; - more -= much; - } else { -#ifdef UPSAMPLE - if (much % 16) - JOM(8, "MISTAKE? much" - " is not divisible by 16\n"); - if (much > (16 * more)) - much = 16 * more; - p2 = (u8 *)(prt->dma_area + peasycap->dma_fill); - - for (j = 0; j < (much / 16); j++) { - newaudio = ((int) *p1) - 128; - newaudio = 128 * newaudio; - - delta = (newaudio - oldaudio) / 4; - tmp = oldaudio + delta; - - for (k = 0; k < 4; k++) { - *p2 = (0x00FF & tmp); - *(p2 + 1) = (0xFF00 & tmp) >> 8; - p2 += 2; - *p2 = (0x00FF & tmp); - *(p2 + 1) = (0xFF00 & tmp) >> 8; - p2 += 2; - tmp += delta; - } - p1++; - more--; - oldaudio = tmp; - } -#else /*!UPSAMPLE*/ - if (much > (2 * more)) - much = 2 * more; - p2 = (u8 *)(prt->dma_area + peasycap->dma_fill); - - for (j = 0; j < (much / 2); j++) { - tmp = ((int) *p1) - 128; - tmp = 128 * tmp; - *p2 = (0x00FF & tmp); - *(p2 + 1) = (0xFF00 & tmp) >> 8; - p1++; - p2 += 2; - more--; - } -#endif /*UPSAMPLE*/ - } - peasycap->dma_fill += much; - if (peasycap->dma_fill >= peasycap->dma_next) { - isfragment = peasycap->dma_fill / fragment_bytes; - if (0 > isfragment) { - SAM("MISTAKE: isfragment is negative\n"); - return; - } - peasycap->dma_read = (isfragment - 1) * fragment_bytes; - peasycap->dma_next = (isfragment + 1) * fragment_bytes; - if (dma_bytes < peasycap->dma_next) - peasycap->dma_next = fragment_bytes; - - if (0 <= peasycap->dma_read) { - JOM(8, "snd_pcm_period_elapsed(), %i=" - "isfragment\n", isfragment); - snd_pcm_period_elapsed(pss); - } - } - } - -#ifdef UPSAMPLE - peasycap->oldaudio = oldaudio; -#endif /*UPSAMPLE*/ - - } -/*---------------------------------------------------------------------------*/ -/* - * RESUBMIT THIS URB - */ -/*---------------------------------------------------------------------------*/ -resubmit: - if (peasycap->audio_isoc_streaming == 0) - return; - - rc = usb_submit_urb(purb, GFP_ATOMIC); - if (rc) { - if ((-ENODEV != rc) && (-ENOENT != rc)) { - SAM("ERROR: while %i=audio_idle, usb_submit_urb failed " - "with rc: -%s :%d\n", - peasycap->audio_idle, strerror(rc), rc); - } - if (0 < peasycap->audio_isoc_streaming) - peasycap->audio_isoc_streaming--; - } - return; -} -/*****************************************************************************/ -static int easycap_alsa_open(struct snd_pcm_substream *pss) -{ - struct snd_pcm *psnd_pcm; - struct snd_card *psnd_card; - struct easycap *peasycap; - - JOT(4, "\n"); - if (!pss) { - SAY("ERROR: pss is NULL\n"); - return -EFAULT; - } - psnd_pcm = pss->pcm; - if (!psnd_pcm) { - SAY("ERROR: psnd_pcm is NULL\n"); - return -EFAULT; - } - psnd_card = psnd_pcm->card; - if (!psnd_card) { - SAY("ERROR: psnd_card is NULL\n"); - return -EFAULT; - } - - peasycap = psnd_card->private_data; - if (!peasycap) { - SAY("ERROR: peasycap is NULL\n"); - return -EFAULT; - } - if (peasycap->psnd_card != psnd_card) { - SAM("ERROR: bad peasycap->psnd_card\n"); - return -EFAULT; - } - if (peasycap->psubstream) { - SAM("ERROR: bad peasycap->psubstream\n"); - return -EFAULT; - } - pss->private_data = peasycap; - peasycap->psubstream = pss; - pss->runtime->hw = peasycap->alsa_hardware; - pss->runtime->private_data = peasycap; - pss->private_data = peasycap; - - if (0 != easycap_sound_setup(peasycap)) { - JOM(4, "ending unsuccessfully\n"); - return -EFAULT; - } - JOM(4, "ending successfully\n"); - return 0; -} -/*****************************************************************************/ -static int easycap_alsa_close(struct snd_pcm_substream *pss) -{ - struct easycap *peasycap; - - JOT(4, "\n"); - if (!pss) { - SAY("ERROR: pss is NULL\n"); - return -EFAULT; - } - peasycap = snd_pcm_substream_chip(pss); - if (!peasycap) { - SAY("ERROR: peasycap is NULL\n"); - return -EFAULT; - } - pss->private_data = NULL; - peasycap->psubstream = NULL; - JOT(4, "ending successfully\n"); - return 0; -} -/*****************************************************************************/ -static int easycap_alsa_vmalloc(struct snd_pcm_substream *pss, size_t sz) -{ - struct snd_pcm_runtime *prt; - JOT(4, "\n"); - - if (!pss) { - SAY("ERROR: pss is NULL\n"); - return -EFAULT; - } - prt = pss->runtime; - if (!prt) { - SAY("ERROR: substream.runtime is NULL\n"); - return -EFAULT; - } - if (prt->dma_area) { - if (prt->dma_bytes > sz) - return 0; - vfree(prt->dma_area); - } - prt->dma_area = vmalloc(sz); - if (!prt->dma_area) - return -ENOMEM; - prt->dma_bytes = sz; - return 0; -} -/*****************************************************************************/ -static int easycap_alsa_hw_params(struct snd_pcm_substream *pss, - struct snd_pcm_hw_params *phw) -{ - int rc; - - JOT(4, "%i\n", (params_buffer_bytes(phw))); - if (!pss) { - SAY("ERROR: pss is NULL\n"); - return -EFAULT; - } - rc = easycap_alsa_vmalloc(pss, params_buffer_bytes(phw)); - if (rc) - return rc; - return 0; -} -/*****************************************************************************/ -static int easycap_alsa_hw_free(struct snd_pcm_substream *pss) -{ - struct snd_pcm_runtime *prt; - JOT(4, "\n"); - - if (!pss) { - SAY("ERROR: pss is NULL\n"); - return -EFAULT; - } - prt = pss->runtime; - if (!prt) { - SAY("ERROR: substream.runtime is NULL\n"); - return -EFAULT; - } - if (prt->dma_area) { - JOT(8, "prt->dma_area = %p\n", prt->dma_area); - vfree(prt->dma_area); - prt->dma_area = NULL; - } else - JOT(8, "dma_area already freed\n"); - return 0; -} -/*****************************************************************************/ -static int easycap_alsa_prepare(struct snd_pcm_substream *pss) -{ - struct easycap *peasycap; - struct snd_pcm_runtime *prt; - - JOT(4, "\n"); - if (!pss) { - SAY("ERROR: pss is NULL\n"); - return -EFAULT; - } - prt = pss->runtime; - peasycap = snd_pcm_substream_chip(pss); - if (!peasycap) { - SAY("ERROR: peasycap is NULL\n"); - return -EFAULT; - } - - JOM(16, "ALSA decides %8i Hz=rate\n", pss->runtime->rate); - JOM(16, "ALSA decides %8ld =period_size\n", pss->runtime->period_size); - JOM(16, "ALSA decides %8i =periods\n", pss->runtime->periods); - JOM(16, "ALSA decides %8ld =buffer_size\n", pss->runtime->buffer_size); - JOM(16, "ALSA decides %8zd =dma_bytes\n", pss->runtime->dma_bytes); - JOM(16, "ALSA decides %8ld =boundary\n", pss->runtime->boundary); - JOM(16, "ALSA decides %8i =period_step\n", pss->runtime->period_step); - JOM(16, "ALSA decides %8i =sample_bits\n", pss->runtime->sample_bits); - JOM(16, "ALSA decides %8i =frame_bits\n", pss->runtime->frame_bits); - JOM(16, "ALSA decides %8ld =min_align\n", pss->runtime->min_align); - JOM(12, "ALSA decides %8ld =hw_ptr_base\n", pss->runtime->hw_ptr_base); - JOM(12, "ALSA decides %8ld =hw_ptr_interrupt\n", - pss->runtime->hw_ptr_interrupt); - - if (prt->dma_bytes != 4 * ((int)prt->period_size) * ((int)prt->periods)) { - SAY("MISTAKE: unexpected ALSA parameters\n"); - return -ENOENT; - } - return 0; -} -/*****************************************************************************/ -static int easycap_alsa_ack(struct snd_pcm_substream *pss) -{ - return 0; -} -/*****************************************************************************/ -static int easycap_alsa_trigger(struct snd_pcm_substream *pss, int cmd) -{ - struct easycap *peasycap; - - JOT(4, "%i=cmd cf %i=START %i=STOP\n", cmd, SNDRV_PCM_TRIGGER_START, - SNDRV_PCM_TRIGGER_STOP); - if (!pss) { - SAY("ERROR: pss is NULL\n"); - return -EFAULT; - } - peasycap = snd_pcm_substream_chip(pss); - if (!peasycap) { - SAY("ERROR: peasycap is NULL\n"); - return -EFAULT; - } - switch (cmd) { - case SNDRV_PCM_TRIGGER_START: { - peasycap->audio_idle = 0; - break; - } - case SNDRV_PCM_TRIGGER_STOP: { - peasycap->audio_idle = 1; - break; - } - default: - return -EINVAL; - } - return 0; -} -/*****************************************************************************/ -static snd_pcm_uframes_t easycap_alsa_pointer(struct snd_pcm_substream *pss) -{ - struct easycap *peasycap; - snd_pcm_uframes_t offset; - - JOT(16, "\n"); - if (!pss) { - SAY("ERROR: pss is NULL\n"); - return -EFAULT; - } - peasycap = snd_pcm_substream_chip(pss); - if (!peasycap) { - SAY("ERROR: peasycap is NULL\n"); - return -EFAULT; - } - if ((0 != peasycap->audio_eof) || (0 != peasycap->audio_idle)) { - JOM(8, "returning -EIO because " - "%i=audio_idle %i=audio_eof\n", - peasycap->audio_idle, peasycap->audio_eof); - return -EIO; - } -/*---------------------------------------------------------------------------*/ - if (0 > peasycap->dma_read) { - JOM(8, "returning -EBUSY\n"); - return -EBUSY; - } - offset = ((snd_pcm_uframes_t)peasycap->dma_read)/4; - JOM(8, "ALSA decides %8i =hw_ptr_base\n", (int)pss->runtime->hw_ptr_base); - JOM(8, "ALSA decides %8i =hw_ptr_interrupt\n", - (int)pss->runtime->hw_ptr_interrupt); - JOM(8, "%7i=offset %7i=dma_read %7i=dma_next\n", - (int)offset, peasycap->dma_read, peasycap->dma_next); - return offset; -} -/*****************************************************************************/ -static struct page * -easycap_alsa_page(struct snd_pcm_substream *pss, unsigned long offset) -{ - return vmalloc_to_page(pss->runtime->dma_area + offset); -} -/*****************************************************************************/ - -static struct snd_pcm_ops easycap_alsa_pcm_ops = { - .open = easycap_alsa_open, - .close = easycap_alsa_close, - .ioctl = snd_pcm_lib_ioctl, - .hw_params = easycap_alsa_hw_params, - .hw_free = easycap_alsa_hw_free, - .prepare = easycap_alsa_prepare, - .ack = easycap_alsa_ack, - .trigger = easycap_alsa_trigger, - .pointer = easycap_alsa_pointer, - .page = easycap_alsa_page, -}; - -/*****************************************************************************/ -/*---------------------------------------------------------------------------*/ -/* - * THE FUNCTION snd_card_create() HAS THIS_MODULE AS AN ARGUMENT. THIS - * MEANS MODULE easycap. BEWARE. -*/ -/*---------------------------------------------------------------------------*/ -int easycap_alsa_probe(struct easycap *peasycap) -{ - int rc; - struct snd_card *psnd_card; - struct snd_pcm *psnd_pcm; - - if (!peasycap) { - SAY("ERROR: peasycap is NULL\n"); - return -ENODEV; - } - if (0 > peasycap->minor) { - SAY("ERROR: no minor\n"); - return -ENODEV; - } - - peasycap->alsa_hardware = alsa_hardware; - if (peasycap->microphone) { - peasycap->alsa_hardware.rates = SNDRV_PCM_RATE_32000; - peasycap->alsa_hardware.rate_min = 32000; - peasycap->alsa_hardware.rate_max = 32000; - } else { - peasycap->alsa_hardware.rates = SNDRV_PCM_RATE_48000; - peasycap->alsa_hardware.rate_min = 48000; - peasycap->alsa_hardware.rate_max = 48000; - } - - if (0 != snd_card_create(SNDRV_DEFAULT_IDX1, "easycap_alsa", - THIS_MODULE, 0, &psnd_card)) { - SAY("ERROR: Cannot do ALSA snd_card_create()\n"); - return -EFAULT; - } - - sprintf(&psnd_card->id[0], "EasyALSA%i", peasycap->minor); - strcpy(&psnd_card->driver[0], EASYCAP_DRIVER_DESCRIPTION); - strcpy(&psnd_card->shortname[0], "easycap_alsa"); - sprintf(&psnd_card->longname[0], "%s", &psnd_card->shortname[0]); - - psnd_card->dev = &peasycap->pusb_device->dev; - psnd_card->private_data = peasycap; - peasycap->psnd_card = psnd_card; - - rc = snd_pcm_new(psnd_card, "easycap_pcm", 0, 0, 1, &psnd_pcm); - if (rc) { - SAM("ERROR: Cannot do ALSA snd_pcm_new()\n"); - snd_card_free(psnd_card); - return -EFAULT; - } - - snd_pcm_set_ops(psnd_pcm, SNDRV_PCM_STREAM_CAPTURE, - &easycap_alsa_pcm_ops); - psnd_pcm->info_flags = 0; - strcpy(&psnd_pcm->name[0], &psnd_card->id[0]); - psnd_pcm->private_data = peasycap; - peasycap->psnd_pcm = psnd_pcm; - peasycap->psubstream = NULL; - - rc = snd_card_register(psnd_card); - if (rc) { - SAM("ERROR: Cannot do ALSA snd_card_register()\n"); - snd_card_free(psnd_card); - return -EFAULT; - } - - SAM("registered %s\n", &psnd_card->id[0]); - return 0; -} - |