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Diffstat (limited to 'hdspm_mixer.c')
| -rw-r--r-- | hdspm_mixer.c | 231 |
1 files changed, 231 insertions, 0 deletions
diff --git a/hdspm_mixer.c b/hdspm_mixer.c new file mode 100644 index 0000000..4cc7039 --- /dev/null +++ b/hdspm_mixer.c @@ -0,0 +1,231 @@ +/* Very simple Mixer for RME DSP-MADI and maybe other hammerfall dsp + (C) 2003 IEM, Winfried Ritsch (ritsch at iem.at) + Institute of Electronic Music and Acoustics + GPL - see Licence.txt + + Use it as library for other programs, or standalone commandline programm + + eg.:compile as program: cc -o hdspmmixer -DMAIN -lm -lc -lasound hdsdpmmixer.c +*/ +#include <string.h> +#include <stdlib.h> +#include <math.h> +#include <sys/ioctl.h> +#include <alsa/asoundlib.h> + +/* #include <sound/hdsp.h> */ + +#include "hdspm_mixer.h" + +/* #define QUIET (on cc commandline) */ +#ifndef VERBOSE + #define QUIET +#endif + +static char card_name[HDSPMM_MAX_CARDS][HDSPMM_MAX_NAME_LEN]; +static int cardid = 0; + +int find_cards() +{ + int i; + char *name; + int card = HDSPMM_ERROR_NO_CARD; + int n = 0; + + +#ifndef QUIET + printf("Searching mixer for hdspm ...\n"); +#endif + + while (snd_card_next(&card) >= 0) { + if (card < 0) { + break; + } else { + + snd_card_get_name(card, &name); + +#ifdef DEBUG + printf("Card %d : %s\n", card, name); +#endif + + if (strncmp(name, "HDSPM MADI", 9) == 0) { + + snprintf(card_name[n], 6, "hw:%i", n); + +#ifndef QUIET + printf("HDSP MADI as card %d (%s) found !\n",n,card_name[n]); +#endif + n++; + if(n >= HDSPMM_MAX_CARDS) + break; + } + } + } + + if (!n) + return HDSPMM_ERROR_NO_CARD; + + for (i = n; i < HDSPMM_MAX_CARDS; i++) { + card_name[i][0] = '\0'; + } + + return n; +} + +int set_gain(int idx, int src, int dst, int val) +{ + int err; + + + snd_ctl_elem_id_t *id; + snd_ctl_elem_value_t *ctl; + snd_ctl_t *handle; + + if(idx >= HDSPMM_MAX_CARDS || idx < 0) + return HDSPMM_ERROR_WRONG_IDX; + + snd_ctl_elem_value_alloca(&ctl); + snd_ctl_elem_id_alloca(&id); + snd_ctl_elem_id_set_name(id, "Mixer"); + snd_ctl_elem_id_set_numid(id, 0); + snd_ctl_elem_id_set_interface(id, SND_CTL_ELEM_IFACE_HWDEP); + snd_ctl_elem_id_set_device(id, 0); + snd_ctl_elem_id_set_subdevice(id, 0); + snd_ctl_elem_id_set_index(id, 0); + snd_ctl_elem_value_set_id(ctl, id); + + if ((err = snd_ctl_open(&handle, card_name[idx], SND_CTL_NONBLOCK)) < 0) { +#ifndef QUIET + fprintf(stderr, "Alsa error: %s\n", snd_strerror(err)); +#endif + return HDSPMM_ERROR_ALSA_OPEN; + } + + snd_ctl_elem_value_set_integer(ctl, 0, src); + snd_ctl_elem_value_set_integer(ctl, 1, dst); + snd_ctl_elem_value_set_integer(ctl, 2, val); + + if ((err = snd_ctl_elem_write(handle, ctl)) < 0) { +#ifndef QUIET + fprintf(stderr, "Alsa error: %s\n", snd_strerror(err)); +#endif + return HDSPMM_ERROR_ALSA_WRITE; + } + + val = snd_ctl_elem_value_get_integer(ctl, 2); + + snd_ctl_close(handle); + return val; +} + +int get_gain(int idx, int src, int dst) +{ + int err; + int val = HDSPMM_ERROR_NO_CARD; + + snd_ctl_elem_id_t *id; + snd_ctl_elem_value_t *ctl; + snd_ctl_t *handle; + + if(idx >= HDSPMM_MAX_CARDS || idx < 0) + return HDSPMM_ERROR_WRONG_IDX; + + + snd_ctl_elem_value_alloca(&ctl); + snd_ctl_elem_id_alloca(&id); + snd_ctl_elem_id_set_name(id, "Mixer"); + snd_ctl_elem_id_set_numid(id, 0); + snd_ctl_elem_id_set_interface(id, SND_CTL_ELEM_IFACE_HWDEP); + snd_ctl_elem_id_set_device(id, 0); + snd_ctl_elem_id_set_subdevice(id, 0); + snd_ctl_elem_id_set_index(id, 0); + snd_ctl_elem_value_set_id(ctl, id); + + if ((err = snd_ctl_open(&handle, card_name[cardid], SND_CTL_NONBLOCK)) < 0) { +#ifndef QUIET + fprintf(stderr, "Alsa error: %s\n", snd_strerror(err)); +#endif + return HDSPMM_ERROR_ALSA_OPEN; + } + + snd_ctl_elem_value_set_integer(ctl, 0, src); + snd_ctl_elem_value_set_integer(ctl, 1, dst); + + if ((err = snd_ctl_elem_read(handle, ctl)) < 0) { +#ifndef QUIET + fprintf(stderr, "Alsa error: %s\n", snd_strerror(err)); +#endif + return HDSPMM_ERROR_ALSA_READ; + } + val = snd_ctl_elem_value_get_integer(ctl, 2); + + snd_ctl_close(handle); + + return val; +} + +#ifdef MAIN + +int main(int argc, char *argv[]) +{ + int err = 0; + + int src; + int dst; + int val; + + /* + int i; + + for(i=0; i < argc; i++) + printf(" %s ", argv[i]); + printf("\n"); + */ + /* + if((err =find_cards()) < 0) + return err; + */ + + if(argc < 4){ + printf("\nusage %s <devnr> <src> <dst> [value] \n\n" + " devnr ... ALSA-Device eg. for hw:0 is 0 \n" + " src ... inputs 0-63 playback 64-127\n" + " dst ... out channel 0-63\n" + "\noptional if wanting to set a value:\n\n" + " value ... gain 0=0 (mute), 32768=1 (unitGain), 65535 = max\n\n", + argv[0]); + + if(find_cards() < 0) + puts("No Hammerfall DSP MADI card found."); + puts(""); + printf("Version %s, 2003 - IEM, winfried ritsch\n",HDSPMM_VERSION); + return -1; + } + + cardid = atoi(argv[1]); + snprintf(card_name[cardid], 6, "hw:%i", cardid); + + src = atoi(argv[2]); + dst = atoi(argv[3]); + + if(argc == 4){ + + printf(" Get Mixer from %d to %d : %d \n",src,dst, + get_gain(cardid,src,dst)); + + return 0; + } + + /* arg is 5 */ + val = atoi(argv[4]); + + if((err = set_gain(cardid,src,dst,val)) < 0 ) + printf("Error: Could not set mixer from %d to %d gain %d:%s \n", + src,dst,val,snd_strerror(err)); + else + printf("Set Mixer from %d to %d : %d \n",src,dst,val); + + + return err; +} +#endif |