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https://github.com/alsa-project/alsa-lib.git
synced 2025-11-02 09:01:48 -05:00
Code enhancements, added support for FM801 (untested)
This commit is contained in:
Jaroslav Kysela
parent
e0ef729f41
commit
7e1f41be73
1 changed files with 170 additions and 26 deletions
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@ -453,46 +453,130 @@ static int snd_pcm_surround_free(snd_pcm_surround_t *surr)
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return 0;
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}
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static int snd_pcm_surround_one_stream(snd_pcm_surround_t *surr,
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snd_pcm_surround_type_t type ATTRIBUTE_UNUSED,
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int card,
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int dev, int subdev,
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snd_pcm_stream_t stream, int mode)
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{
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int err;
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if ((err = snd_pcm_hw_open(&surr->pcm[0], "Surround", card, dev,
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subdev, stream, mode)) < 0)
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return err;
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surr->pcms++;
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return 0;
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}
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static int snd_pcm_surround_three_streams(snd_pcm_surround_t *surr,
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snd_pcm_surround_type_t type,
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int card,
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int dev0, int subdev0,
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int dev1, int subdev1,
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int dev2, int subdev2,
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int mode)
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snd_pcm_stream_t stream, int mode)
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{
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int err;
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if ((err = snd_pcm_hw_open(&surr->pcm[0], "Surround L/R", card, dev0,
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subdev0, SND_PCM_STREAM_PLAYBACK, mode)) < 0)
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subdev0, stream, mode)) < 0)
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return err;
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surr->pcms++;
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if ((err = snd_pcm_hw_open(&surr->pcm[1], "Surround Rear L/R", card, dev1,
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subdev1, SND_PCM_STREAM_PLAYBACK, mode)) < 0)
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subdev1, stream, mode)) < 0)
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return err;
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surr->pcms++;
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if (type == SND_PCM_SURROUND_51) {
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if ((err = snd_pcm_hw_open(&surr->pcm[2], "Surround Center/LFE", card, dev2,
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subdev2, SND_PCM_STREAM_PLAYBACK, mode)) < 0)
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subdev2, stream, mode)) < 0)
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return err;
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surr->pcms++;
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}
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return 0;
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}
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static int count_generic(snd_ctl_t *ctl ATTRIBUTE_UNUSED,
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snd_ctl_card_info_t *info ATTRIBUTE_UNUSED,
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snd_pcm_surround_type_t type ATTRIBUTE_UNUSED)
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{
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return 1;
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}
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static int count_si7018(snd_ctl_t *ctl ATTRIBUTE_UNUSED,
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snd_ctl_card_info_t *info ATTRIBUTE_UNUSED,
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snd_pcm_surround_type_t type ATTRIBUTE_UNUSED)
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{
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/* this card supports multiopen also for DVD !!! */
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return 32 / 2 / 3; /* 32 stereo channels / 2 (one helper voice) / 3 (count of streams) */
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}
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static int open_si7018(snd_pcm_surround_t *surr,
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snd_ctl_t *ctl ATTRIBUTE_UNUSED,
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snd_ctl_card_info_t *info,
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snd_pcm_surround_type_t type,
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snd_pcm_stream_t stream, int mode)
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{
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int err;
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if ((err = snd_pcm_surround_three_streams(surr, type,
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snd_ctl_card_info_get_card(info),
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0, -1, 0, -1, 0, -1,
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stream, mode)) < 0)
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return err;
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return 0;
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}
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static int open_fm801(snd_pcm_surround_t *surr,
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snd_ctl_t *ctl ATTRIBUTE_UNUSED,
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snd_ctl_card_info_t *info,
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snd_pcm_surround_type_t type,
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snd_pcm_stream_t stream, int mode)
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{
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int err;
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if ((err = snd_pcm_surround_one_stream(surr, type,
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snd_ctl_card_info_get_card(info),
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0, 0, stream, mode)) < 0)
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return err;
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return 0;
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}
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#define SND_CARD_TYPE_NONE SNDRV_CARD_TYPE_SB_10 /* this card definitely doesn't support surround */
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#define SURR_FLG_CAPTURE (1<<0)
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#define SURR_FLG_NO_4CH (1<<1)
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#define SURR_FLG_NO_6CH (1<<2)
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typedef struct {
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snd_card_type_t type;
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unsigned int flags;
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int (*scount)(snd_ctl_t *ctl, snd_ctl_card_info_t *info, snd_pcm_surround_type_t type);
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int (*sopen)(snd_pcm_surround_t *surr,
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snd_ctl_t *ctl, snd_ctl_card_info_t *info,
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snd_pcm_surround_type_t type,
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snd_pcm_stream_t stream,
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int mode);
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} surround_open_t;
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static surround_open_t open_table[] = {
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{ type: SND_CARD_TYPE_SI_7018, flags: 0, scount: count_si7018, sopen: open_si7018 },
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{ type: SND_CARD_TYPE_FM801, flags: 0, scount: count_generic, sopen: open_fm801 },
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{ type: SND_CARD_TYPE_NONE, flags: 0, scount: NULL, sopen: NULL }
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};
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int snd_pcm_surround_open(snd_pcm_t **pcmp, const char *name, int card, int dev,
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snd_pcm_surround_type_t type,
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snd_pcm_stream_t stream, int mode)
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{
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snd_pcm_t *pcm;
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snd_pcm_t *pcm = NULL;
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snd_pcm_surround_t *surr;
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snd_ctl_t *ctl;
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snd_ctl_t *ctl = NULL;
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snd_ctl_card_info_t *info;
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snd_card_type_t ctype;
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surround_open_t *po;
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int err;
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assert(pcmp);
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if (stream == SND_PCM_STREAM_CAPTURE)
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return -EINVAL; /* not supported at the time */
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if (dev != 0)
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return -EINVAL; /* not supported at the time */
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surr = calloc(1, sizeof(snd_pcm_surround_t));
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@ -514,29 +598,44 @@ int snd_pcm_surround_open(snd_pcm_t **pcmp, const char *name, int card, int dev,
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return err;
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}
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snd_ctl_card_info_alloca(&info);
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if ((err = snd_ctl_card_info(ctl, info)) < 0) {
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snd_ctl_close(ctl);
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snd_pcm_surround_free(surr);
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return err;
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}
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switch (snd_ctl_card_info_get_type(info)) {
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case SND_CARD_TYPE_SI_7018:
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if ((err = snd_pcm_surround_three_streams(surr, type, card,
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0, -1, 0, -1, 0, -1, mode)) < 0) {
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snd_pcm_surround_free(surr);
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return err;
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if ((err = snd_ctl_card_info(ctl, info)) < 0)
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goto __error;
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ctype = snd_ctl_card_info_get_type(info);
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for (po = open_table; po->type != SND_CARD_TYPE_NONE; po++) {
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if (po->type == ctype) {
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if (stream == SND_PCM_STREAM_CAPTURE && !(po->flags & SURR_FLG_CAPTURE)) {
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err = -ENODEV;
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goto __error;
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}
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switch (type) {
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case SND_PCM_SURROUND_40:
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if (po->flags & SURR_FLG_NO_4CH) {
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err = -ENODEV;
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goto __error;
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}
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break;
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case SND_PCM_SURROUND_51:
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if (po->flags & SURR_FLG_NO_6CH) {
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err = -ENODEV;
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goto __error;
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}
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break;
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}
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if ((err = po->sopen(surr, ctl, info, type, stream, mode)) < 0)
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goto __error;
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break;
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}
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break;
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default:
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snd_ctl_close(ctl);
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snd_pcm_surround_free(surr);
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return -ENODEV;
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}
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if (po->type == SND_CARD_TYPE_NONE) {
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err = -ENODEV;
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goto __error;
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}
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snd_ctl_close(ctl);
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ctl = NULL;
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pcm = calloc(1, sizeof(snd_pcm_t));
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if (!pcm) {
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snd_pcm_surround_free(surr);
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return -ENOMEM;
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err = -ENOMEM;
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goto __error;
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}
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if (name)
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pcm->name = strdup(name);
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@ -555,6 +654,12 @@ int snd_pcm_surround_open(snd_pcm_t **pcmp, const char *name, int card, int dev,
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*pcmp = pcm;
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return 0;
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__error:
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if (ctl)
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snd_ctl_close(ctl);
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snd_pcm_surround_free(surr);
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return err;
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}
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int _snd_pcm_surround_open(snd_pcm_t **pcmp, const char *name, snd_config_t *conf,
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@ -623,3 +728,42 @@ int _snd_pcm_surround_open(snd_pcm_t **pcmp, const char *name, snd_config_t *con
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}
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return snd_pcm_surround_open(pcmp, name, card, device, type, stream, mode);
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}
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int snd_pcm_surround_next_device(snd_ctl_t *ctl, snd_pcm_surround_type_t type, int *device)
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{
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int err;
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snd_ctl_card_info_t *info;
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snd_card_type_t ctype;
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surround_open_t *po;
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assert(device);
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snd_ctl_card_info_alloca(&info);
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if ((err = snd_ctl_card_info(ctl, info)) < 0)
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return err;
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ctype = snd_ctl_card_info_get_type(info);
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for (po = open_table; po->type != SND_CARD_TYPE_NONE; po++) {
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if (po->type == ctype) {
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switch (type) {
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case SND_PCM_SURROUND_40:
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if (po->flags & SURR_FLG_NO_4CH)
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return -ENODEV;
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break;
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case SND_PCM_SURROUND_51:
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if (po->flags & SURR_FLG_NO_6CH)
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return -ENODEV;
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break;
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}
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if ((err = po->scount(ctl, info, type)) < 0)
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return err;
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if (err == 0)
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return -ENODEV;
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if (*device == 0)
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*device = 0;
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(*device)++;
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if (*device >= err)
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*device = -1;
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return 0;
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}
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}
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return -ENODEV;
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}
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