From: Clemens Ladisch Date: Mon, 13 Aug 2007 15:40:54 +0000 (+0200) Subject: [ALSA] pcm: add snd_pcm_rate_to_rate_bit() helper X-Git-Tag: v2.6.24-rc1~832^2~179 X-Git-Url: http://pilppa.com/gitweb/?a=commitdiff_plain;h=918f3a0e8cf67b5db966516f255eaf24d814fac0;p=linux-2.6-omap-h63xx.git [ALSA] pcm: add snd_pcm_rate_to_rate_bit() helper Add a snd_pcm_rate_to_rate_bit() function to factor out common code used by several drivers. Signed-off-by: Clemens Ladisch Signed-off-by: Jaroslav Kysela --- diff --git a/include/sound/pcm.h b/include/sound/pcm.h index 2d5dee2fcb6..27f8ef48b5e 100644 --- a/include/sound/pcm.h +++ b/include/sound/pcm.h @@ -925,6 +925,7 @@ snd_pcm_sframes_t snd_pcm_lib_readv(struct snd_pcm_substream *substream, extern const struct snd_pcm_hw_constraint_list snd_pcm_known_rates; int snd_pcm_limit_hw_rates(struct snd_pcm_runtime *runtime); +unsigned int snd_pcm_rate_to_rate_bit(unsigned int rate); static inline void snd_pcm_set_runtime_buffer(struct snd_pcm_substream *substream, struct snd_dma_buffer *bufp) diff --git a/sound/core/pcm_misc.c b/sound/core/pcm_misc.c index afd1e492975..e5f25ae73ee 100644 --- a/sound/core/pcm_misc.c +++ b/sound/core/pcm_misc.c @@ -450,3 +450,21 @@ int snd_pcm_limit_hw_rates(struct snd_pcm_runtime *runtime) } EXPORT_SYMBOL(snd_pcm_limit_hw_rates); + +/** + * snd_pcm_rate_to_rate_bit - converts sample rate to SNDRV_PCM_RATE_xxx bit + * @rate: the sample rate to convert + * + * Returns the SNDRV_PCM_RATE_xxx flag that corresponds to the given rate, or + * SNDRV_PCM_RATE_KNOT for an unknown rate. + */ +unsigned int snd_pcm_rate_to_rate_bit(unsigned int rate) +{ + unsigned int i; + + for (i = 0; i < snd_pcm_known_rates.count; i++) + if (snd_pcm_known_rates.list[i] == rate) + return 1u << i; + return SNDRV_PCM_RATE_KNOT; +} +EXPORT_SYMBOL(snd_pcm_rate_to_rate_bit); diff --git a/sound/pci/bt87x.c b/sound/pci/bt87x.c index f0e12985dc2..85d50b64d2b 100644 --- a/sound/pci/bt87x.c +++ b/sound/pci/bt87x.c @@ -340,28 +340,9 @@ static struct snd_pcm_hardware snd_bt87x_analog_hw = { static int snd_bt87x_set_digital_hw(struct snd_bt87x *chip, struct snd_pcm_runtime *runtime) { - static struct { - int rate; - unsigned int bit; - } ratebits[] = { - {8000, SNDRV_PCM_RATE_8000}, - {11025, SNDRV_PCM_RATE_11025}, - {16000, SNDRV_PCM_RATE_16000}, - {22050, SNDRV_PCM_RATE_22050}, - {32000, SNDRV_PCM_RATE_32000}, - {44100, SNDRV_PCM_RATE_44100}, - {48000, SNDRV_PCM_RATE_48000} - }; - int i; - chip->reg_control |= CTL_DA_IOM_DA; runtime->hw = snd_bt87x_digital_hw; - runtime->hw.rates = SNDRV_PCM_RATE_KNOT; - for (i = 0; i < ARRAY_SIZE(ratebits); ++i) - if (chip->dig_rate == ratebits[i].rate) { - runtime->hw.rates = ratebits[i].bit; - break; - } + runtime->hw.rates = snd_pcm_rate_to_rate_bit(chip->dig_rate); runtime->hw.rate_min = chip->dig_rate; runtime->hw.rate_max = chip->dig_rate; return 0; diff --git a/sound/pci/rme32.c b/sound/pci/rme32.c index ee0189b756d..1475912588e 100644 --- a/sound/pci/rme32.c +++ b/sound/pci/rme32.c @@ -258,19 +258,6 @@ static inline unsigned int snd_rme32_pcm_byteptr(struct rme32 * rme32) & RME32_RCR_AUDIO_ADDR_MASK); } -static int snd_rme32_ratecode(int rate) -{ - switch (rate) { - case 32000: return SNDRV_PCM_RATE_32000; - case 44100: return SNDRV_PCM_RATE_44100; - case 48000: return SNDRV_PCM_RATE_48000; - case 64000: return SNDRV_PCM_RATE_64000; - case 88200: return SNDRV_PCM_RATE_88200; - case 96000: return SNDRV_PCM_RATE_96000; - } - return 0; -} - /* silence callback for halfduplex mode */ static int snd_rme32_playback_silence(struct snd_pcm_substream *substream, int channel, /* not used (interleaved data) */ snd_pcm_uframes_t pos, @@ -887,7 +874,7 @@ static int snd_rme32_playback_spdif_open(struct snd_pcm_substream *substream) if ((rme32->rcreg & RME32_RCR_KMODE) && (rate = snd_rme32_capture_getrate(rme32, &dummy)) > 0) { /* AutoSync */ - runtime->hw.rates = snd_rme32_ratecode(rate); + runtime->hw.rates = snd_pcm_rate_to_rate_bit(rate); runtime->hw.rate_min = rate; runtime->hw.rate_max = rate; } @@ -929,7 +916,7 @@ static int snd_rme32_capture_spdif_open(struct snd_pcm_substream *substream) if (isadat) { return -EIO; } - runtime->hw.rates = snd_rme32_ratecode(rate); + runtime->hw.rates = snd_pcm_rate_to_rate_bit(rate); runtime->hw.rate_min = rate; runtime->hw.rate_max = rate; } @@ -965,7 +952,7 @@ snd_rme32_playback_adat_open(struct snd_pcm_substream *substream) if ((rme32->rcreg & RME32_RCR_KMODE) && (rate = snd_rme32_capture_getrate(rme32, &dummy)) > 0) { /* AutoSync */ - runtime->hw.rates = snd_rme32_ratecode(rate); + runtime->hw.rates = snd_pcm_rate_to_rate_bit(rate); runtime->hw.rate_min = rate; runtime->hw.rate_max = rate; } @@ -989,7 +976,7 @@ snd_rme32_capture_adat_open(struct snd_pcm_substream *substream) if (!isadat) { return -EIO; } - runtime->hw.rates = snd_rme32_ratecode(rate); + runtime->hw.rates = snd_pcm_rate_to_rate_bit(rate); runtime->hw.rate_min = rate; runtime->hw.rate_max = rate; } diff --git a/sound/pci/rme96.c b/sound/pci/rme96.c index ba4a34bae48..0b3c532c401 100644 --- a/sound/pci/rme96.c +++ b/sound/pci/rme96.c @@ -300,20 +300,6 @@ snd_rme96_capture_ptr(struct rme96 *rme96) & RME96_RCR_AUDIO_ADDR_MASK) >> rme96->capture_frlog; } -static int -snd_rme96_ratecode(int rate) -{ - switch (rate) { - case 32000: return SNDRV_PCM_RATE_32000; - case 44100: return SNDRV_PCM_RATE_44100; - case 48000: return SNDRV_PCM_RATE_48000; - case 64000: return SNDRV_PCM_RATE_64000; - case 88200: return SNDRV_PCM_RATE_88200; - case 96000: return SNDRV_PCM_RATE_96000; - } - return 0; -} - static int snd_rme96_playback_silence(struct snd_pcm_substream *substream, int channel, /* not used (interleaved data) */ @@ -1192,7 +1178,7 @@ snd_rme96_playback_spdif_open(struct snd_pcm_substream *substream) (rate = snd_rme96_capture_getrate(rme96, &dummy)) > 0) { /* slave clock */ - runtime->hw.rates = snd_rme96_ratecode(rate); + runtime->hw.rates = snd_pcm_rate_to_rate_bit(rate); runtime->hw.rate_min = rate; runtime->hw.rate_max = rate; } @@ -1219,7 +1205,7 @@ snd_rme96_capture_spdif_open(struct snd_pcm_substream *substream) if (isadat) { return -EIO; } - runtime->hw.rates = snd_rme96_ratecode(rate); + runtime->hw.rates = snd_pcm_rate_to_rate_bit(rate); runtime->hw.rate_min = rate; runtime->hw.rate_max = rate; } @@ -1259,7 +1245,7 @@ snd_rme96_playback_adat_open(struct snd_pcm_substream *substream) (rate = snd_rme96_capture_getrate(rme96, &dummy)) > 0) { /* slave clock */ - runtime->hw.rates = snd_rme96_ratecode(rate); + runtime->hw.rates = snd_pcm_rate_to_rate_bit(rate); runtime->hw.rate_min = rate; runtime->hw.rate_max = rate; } @@ -1284,7 +1270,7 @@ snd_rme96_capture_adat_open(struct snd_pcm_substream *substream) if (!isadat) { return -EIO; } - runtime->hw.rates = snd_rme96_ratecode(rate); + runtime->hw.rates = snd_pcm_rate_to_rate_bit(rate); runtime->hw.rate_min = rate; runtime->hw.rate_max = rate; } diff --git a/sound/ppc/pmac.c b/sound/ppc/pmac.c index 04b95ae5c3a..4f9b19c90a4 100644 --- a/sound/ppc/pmac.c +++ b/sound/ppc/pmac.c @@ -490,35 +490,14 @@ static int snd_pmac_pcm_open(struct snd_pmac *chip, struct pmac_stream *rec, struct snd_pcm_substream *subs) { struct snd_pcm_runtime *runtime = subs->runtime; - int i, j, fflags; - static int typical_freqs[] = { - 44100, - 22050, - 11025, - 0, - }; - static int typical_freq_flags[] = { - SNDRV_PCM_RATE_44100, - SNDRV_PCM_RATE_22050, - SNDRV_PCM_RATE_11025, - 0, - }; + int i; /* look up frequency table and fill bit mask */ runtime->hw.rates = 0; - fflags = chip->freqs_ok; - for (i = 0; typical_freqs[i]; i++) { - for (j = 0; j < chip->num_freqs; j++) { - if ((chip->freqs_ok & (1 << j)) && - chip->freq_table[j] == typical_freqs[i]) { - runtime->hw.rates |= typical_freq_flags[i]; - fflags &= ~(1 << j); - break; - } - } - } - if (fflags) /* rest */ - runtime->hw.rates |= SNDRV_PCM_RATE_KNOT; + for (i = 0; i < chip->num_freqs; i++) + if (chip->freqs_ok & (1 << i)) + runtime->hw.rates |= + snd_pcm_rate_to_rate_bit(chip->freq_table[i]); /* check for minimum and maximum rates */ for (i = 0; i < chip->num_freqs; i++) { diff --git a/sound/soc/codecs/cs4270.c b/sound/soc/codecs/cs4270.c index 8beae65d083..43d50a4d808 100644 --- a/sound/soc/codecs/cs4270.c +++ b/sound/soc/codecs/cs4270.c @@ -55,35 +55,6 @@ struct cs4270_private { static unsigned int mclk_ratios[NUM_MCLK_RATIOS] = {64, 96, 128, 192, 256, 384, 512, 768, 1024}; -/* - * Sampling rate <-> bit patter mapping - * - * This array maps sampling rates to their SNDRV_PCM_RATE_x equivalent. - * - * This is really something that ALSA should provide. - * - * This table is used by cs4270_set_dai_sysclk() to tell ALSA which sampling - * rates the CS4270 currently supports. - */ -static struct { - unsigned int rate; - unsigned int bit; -} rate_map[] = { - {5512, SNDRV_PCM_RATE_5512}, - {8000, SNDRV_PCM_RATE_8000}, - {11025, SNDRV_PCM_RATE_11025}, - {16000, SNDRV_PCM_RATE_16000}, - {22050, SNDRV_PCM_RATE_22050}, - {32000, SNDRV_PCM_RATE_32000}, - {44100, SNDRV_PCM_RATE_44100}, - {48000, SNDRV_PCM_RATE_48000}, - {64000, SNDRV_PCM_RATE_64000}, - {88200, SNDRV_PCM_RATE_88200}, - {96000, SNDRV_PCM_RATE_96000}, - {176400, SNDRV_PCM_RATE_176400}, - {192000, SNDRV_PCM_RATE_192000} -}; - /* * Determine the CS4270 samples rates. * @@ -126,19 +97,15 @@ static int cs4270_set_dai_sysclk(struct snd_soc_codec_dai *codec_dai, cs4270->mclk = freq; for (i = 0; i < NUM_MCLK_RATIOS; i++) { - unsigned int rate; - unsigned int j; - rate = freq / mclk_ratios[i]; - for (j = 0; j < ARRAY_SIZE(rate_map); j++) { - if (rate == rate_map[j].rate) { - rates |= rate_map[j].bit; - if (rate < rate_min) - rate_min = rate; - if (rate > rate_max) - rate_max = rate; - } - } + unsigned int rate = freq / mclk_ratios[i]; + rates |= snd_pcm_rate_to_rate_bit(rate); + if (rate < rate_min) + rate_min = rate; + if (rate > rate_max) + rate_max = rate; } + /* FIXME: soc should support a rate list */ + rates &= ~SNDRV_PCM_RATE_KNOT; if (!rates) { printk(KERN_ERR "cs4270: could not find a valid sample rate\n"); diff --git a/sound/usb/usbaudio.c b/sound/usb/usbaudio.c index ac5666f4c6d..cbe8b335147 100644 --- a/sound/usb/usbaudio.c +++ b/sound/usb/usbaudio.c @@ -123,7 +123,6 @@ struct audioformat { unsigned int rate_min, rate_max; /* min/max rates */ unsigned int nr_rates; /* number of rate table entries */ unsigned int *rate_table; /* rate table */ - unsigned int needs_knot; /* any unusual rates? */ }; struct snd_usb_substream; @@ -1761,7 +1760,7 @@ static int check_hw_params_convention(struct snd_usb_substream *subs) channels[f->format] |= (1 << f->channels); rates[f->format] |= f->rates; /* needs knot? */ - if (f->needs_knot) + if (f->rates & SNDRV_PCM_RATE_KNOT) goto __out; } /* check whether channels and rates match for all formats */ @@ -1817,7 +1816,7 @@ static int snd_usb_pcm_check_knot(struct snd_pcm_runtime *runtime, if (fp->rates & SNDRV_PCM_RATE_CONTINUOUS) return 0; count += fp->nr_rates; - if (fp->needs_knot) + if (fp->rates & SNDRV_PCM_RATE_KNOT) needs_knot = 1; } if (!needs_knot) @@ -2453,7 +2452,7 @@ static int parse_audio_format_rates(struct snd_usb_audio *chip, struct audioform unsigned char *fmt, int offset) { int nr_rates = fmt[offset]; - int found; + if (fmt[0] < offset + 1 + 3 * (nr_rates ? nr_rates : 2)) { snd_printk(KERN_ERR "%d:%u:%d : invalid FORMAT_TYPE desc\n", chip->dev->devnum, fp->iface, fp->altsetting); @@ -2464,20 +2463,15 @@ static int parse_audio_format_rates(struct snd_usb_audio *chip, struct audioform /* * build the rate table and bitmap flags */ - int r, idx, c; + int r, idx; unsigned int nonzero_rates = 0; - /* this table corresponds to the SNDRV_PCM_RATE_XXX bit */ - static unsigned int conv_rates[] = { - 5512, 8000, 11025, 16000, 22050, 32000, 44100, 48000, - 64000, 88200, 96000, 176400, 192000 - }; + fp->rate_table = kmalloc(sizeof(int) * nr_rates, GFP_KERNEL); if (fp->rate_table == NULL) { snd_printk(KERN_ERR "cannot malloc\n"); return -1; } - fp->needs_knot = 0; fp->nr_rates = nr_rates; fp->rate_min = fp->rate_max = combine_triple(&fmt[8]); for (r = 0, idx = offset + 1; r < nr_rates; r++, idx += 3) { @@ -2493,23 +2487,12 @@ static int parse_audio_format_rates(struct snd_usb_audio *chip, struct audioform fp->rate_min = rate; else if (rate > fp->rate_max) fp->rate_max = rate; - found = 0; - for (c = 0; c < (int)ARRAY_SIZE(conv_rates); c++) { - if (rate == conv_rates[c]) { - found = 1; - fp->rates |= (1 << c); - break; - } - } - if (!found) - fp->needs_knot = 1; + fp->rates |= snd_pcm_rate_to_rate_bit(rate); } if (!nonzero_rates) { hwc_debug("All rates were zero. Skipping format!\n"); return -1; } - if (fp->needs_knot) - fp->rates |= SNDRV_PCM_RATE_KNOT; } else { /* continuous rates */ fp->rates = SNDRV_PCM_RATE_CONTINUOUS;