diff options
Diffstat (limited to 'src/output/mint.c')
| -rw-r--r-- | src/output/mint.c | 197 |
1 files changed, 197 insertions, 0 deletions
diff --git a/src/output/mint.c b/src/output/mint.c new file mode 100644 index 0000000..7210293 --- /dev/null +++ b/src/output/mint.c @@ -0,0 +1,197 @@ +/* + mint: audio output for MINT + + copyright ?-2006 by the mpg123 project - free software under the terms of the LGPL 2.1 + see COPYING and AUTHORS files in distribution or http://mpg123.org + initially written by Petr Stehlik +*/ + +/* derived from LINUX, VOXWARE and SUN for MiNT Audio Device by Petr Stehlik */ +#include <fcntl.h> +#include "mpg123app.h" +#include <ioctl.h> +#include <audios.h> +#include "debug.h" + +/* Globals */ +extern int outburst; +int real_rate_printed = 0; + + + +static int rate_best_match(audio_output_t *ao) +{ + int ret,dsp_rate; + + if(!ai || ao->fn < 0 || ao->rate < 0) + return -1; + + dsp_rate = ao->rate; + ret = ioctl(ao->fn,AIOCSSPEED, (void *)dsp_rate); + ret = ioctl(ao->fn,AIOCGSPEED,&dsp_rate); + if(ret < 0) return ret; + ao->rate = dsp_rate; + return 0; +} + +static int set_rate(audio_output_t *ao) +{ + int dsp_rate = ao->rate; + + if(ao->rate >= 0) { + int ret, real_rate; + ret = ioctl(ao->fn, AIOCSSPEED, (void *)dsp_rate); + if (ret >= 0 && !real_rate_printed) { + ioctl(ao->fn,AIOCGSPEED,&real_rate); + if (real_rate != dsp_rate) { + fprintf(stderr, "Replay rate: %d Hz\n", real_rate); + real_rate_printed = 1; + } + } + return ret; + } + + return 0; +} + +static int set_channels(audio_output_t *ao) +{ + int chan = ao->channels; + + if(ao->channels < 1) return 0; + + return ioctl(ao->fn, AIOCSCHAN, (void *)chan); +} + +static int set_format(audio_output_t *ao) +{ + int fmts; + + if(ao->format == -1) + return 0; + + switch(ao->format) { + case MPG123_ENC_SIGNED_16: + default: + fmts = AFMT_S16; + break; + case MPG123_ENC_UNSIGNED_8: + fmts = AFMT_U8; + break; + case MPG123_ENC_SIGNED_8: + fmts = AFMT_S8; + break; + case MPG123_ENC_ULAW_8: + fmts = AFMT_ULAW; + break; + } + + return ioctl(ao->fn, AIOCSFMT, (void *)fmts); +} + +static int reset_parameters(audio_output_t *ao) +{ + int ret; + ret = ioctl(ao->fn,AIOCRESET,NULL); + if(ret >= 0) ret = set_format(ai); + if(ret >= 0) ret = set_channels(ai); + if(ret >= 0) ret = set_rate(ai); + return ret; +} + + + +static int open_mint(audio_output_t *ao) +{ + if(!ai) return -1; + + if(!ao->device) + ao->device = "/dev/audio"; + + ao->fn = open(ao->device,O_WRONLY); + + if(ao->fn < 0) + { + error1("Can't open %s!",ao->device); + return -1; + } + ioctl(ao->fn, AIOCGBLKSIZE, &outburst); + if(outburst > MAXOUTBURST) + outburst = MAXOUTBURST; + if(audio_reset_parameters(ai) < 0) { + close(ao->fn); + return -1; + } + + return ao->fn; +} + +static int get_formats_mint(audio_output_t *ao) +{ + int ret = 0; + int fmts; + + if(ioctl(ao->fn,AIOCGFMTS,&fmts) < 0) + return -1; + + if(fmts & AFMT_ULAW) + ret |= MPG123_ENC_ULAW_8; + if(fmts & AFMT_S16) + ret |= MPG123_ENC_SIGNED_16; + if(fmts & AFMT_U8) + ret |= MPG123_ENC_UNSIGNED_8; + if(fmts & AFMT_S8) + ret |= MPG123_ENC_SIGNED_8; + + return ret; +} + +static int write_mint(audio_output_t *ao,unsigned char *buf,int len) +{ + return write(ao->fn,buf,len); +} + +static int close_mint(audio_output_t *ao) +{ + close (ao->fn); + return 0; +} + +static void flush_mint(audio_output_t *ao) +{ +} + + +static int init_mint(audio_output_t* ao) +{ + if (ao==NULL) return -1; + + /* Set callbacks */ + ao->open = open_mint; + ao->flush = flush_mint; + ao->write = write_mint; + ao->get_formats = get_formats_mint; + ao->close = close_mint; + + /* Success */ + return 0; +} + + + + + +/* + Module information data structure +*/ +mpg123_module_t mpg123_output_module_info = { + /* api_version */ MPG123_MODULE_API_VERSION, + /* name */ "mint", + /* description */ "Audio output for MINT.", + /* revision */ "$Rev:$", + /* handle */ NULL, + + /* init_output */ init_mint, +}; + + |