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author | Takashi Iwai <tiwai@suse.de> | 2006-01-13 12:09:12 +0100 |
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committer | Jaroslav Kysela <perex@suse.cz> | 2006-03-22 10:23:20 +0100 |
commit | 0534ab4279bd25e2d0a888af07466446dac05d74 (patch) | |
tree | c5e6f6398101e9b278db7d7749f93035d6e1fae6 /sound/core/oss/rate.c | |
parent | 9d83911ac082c6d63c1c08f235349113d8c1d0a3 (diff) | |
download | linux-0534ab4279bd25e2d0a888af07466446dac05d74.tar.bz2 |
[ALSA] Clean up pcm-oss plugins
Modules: ALSA<-OSS emulation
Clean up pcm-oss plugin codes.
Removed dead codes, and simplified route/rate plugins.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/core/oss/rate.c')
-rw-r--r-- | sound/core/oss/rate.c | 80 |
1 files changed, 20 insertions, 60 deletions
diff --git a/sound/core/oss/rate.c b/sound/core/oss/rate.c index c4b75bff0ee5..18d8a0f4e816 100644 --- a/sound/core/oss/rate.c +++ b/sound/core/oss/rate.c @@ -50,7 +50,6 @@ struct rate_priv { unsigned int pitch; unsigned int pos; rate_f func; - int get, put; snd_pcm_sframes_t old_src_frames, old_dst_frames; struct rate_channel channels[0]; }; @@ -74,21 +73,12 @@ static void resample_expand(struct snd_pcm_plugin *plugin, unsigned int pos = 0; signed int val; signed short S1, S2; - char *src, *dst; + signed short *src, *dst; unsigned int channel; int src_step, dst_step; int src_frames1, dst_frames1; struct rate_priv *data = (struct rate_priv *)plugin->extra_data; struct rate_channel *rchannels = data->channels; - -#define GET_S16_LABELS -#define PUT_S16_LABELS -#include "plugin_ops.h" -#undef GET_S16_LABELS -#undef PUT_S16_LABELS - void *get = get_s16_labels[data->get]; - void *put = put_s16_labels[data->put]; - signed short sample = 0; for (channel = 0; channel < plugin->src_format.channels; channel++) { pos = data->pos; @@ -101,10 +91,12 @@ static void resample_expand(struct snd_pcm_plugin *plugin, continue; } dst_channels[channel].enabled = 1; - src = (char *)src_channels[channel].area.addr + src_channels[channel].area.first / 8; - dst = (char *)dst_channels[channel].area.addr + dst_channels[channel].area.first / 8; - src_step = src_channels[channel].area.step / 8; - dst_step = dst_channels[channel].area.step / 8; + src = (signed short *)src_channels[channel].area.addr + + src_channels[channel].area.first / 8 / 2; + dst = (signed short *)dst_channels[channel].area.addr + + dst_channels[channel].area.first / 8 / 2; + src_step = src_channels[channel].area.step / 8 / 2; + dst_step = dst_channels[channel].area.step / 8 / 2; src_frames1 = src_frames; dst_frames1 = dst_frames; while (dst_frames1-- > 0) { @@ -112,12 +104,7 @@ static void resample_expand(struct snd_pcm_plugin *plugin, pos &= R_MASK; S1 = S2; if (src_frames1-- > 0) { - goto *get; -#define GET_S16_END after_get -#include "plugin_ops.h" -#undef GET_S16_END - after_get: - S2 = sample; + S2 = *src; src += src_step; } } @@ -126,12 +113,7 @@ static void resample_expand(struct snd_pcm_plugin *plugin, val = -32768; else if (val > 32767) val = 32767; - sample = val; - goto *put; -#define PUT_S16_END after_put -#include "plugin_ops.h" -#undef PUT_S16_END - after_put: + *dst = val; dst += dst_step; pos += data->pitch; } @@ -150,21 +132,12 @@ static void resample_shrink(struct snd_pcm_plugin *plugin, unsigned int pos = 0; signed int val; signed short S1, S2; - char *src, *dst; + signed short *src, *dst; unsigned int channel; int src_step, dst_step; int src_frames1, dst_frames1; struct rate_priv *data = (struct rate_priv *)plugin->extra_data; struct rate_channel *rchannels = data->channels; - -#define GET_S16_LABELS -#define PUT_S16_LABELS -#include "plugin_ops.h" -#undef GET_S16_LABELS -#undef PUT_S16_LABELS - void *get = get_s16_labels[data->get]; - void *put = put_s16_labels[data->put]; - signed short sample = 0; for (channel = 0; channel < plugin->src_format.channels; ++channel) { pos = data->pos; @@ -177,21 +150,18 @@ static void resample_shrink(struct snd_pcm_plugin *plugin, continue; } dst_channels[channel].enabled = 1; - src = (char *)src_channels[channel].area.addr + src_channels[channel].area.first / 8; - dst = (char *)dst_channels[channel].area.addr + dst_channels[channel].area.first / 8; - src_step = src_channels[channel].area.step / 8; - dst_step = dst_channels[channel].area.step / 8; + src = (signed short *)src_channels[channel].area.addr + + src_channels[channel].area.first / 8 / 2; + dst = (signed short *)dst_channels[channel].area.addr + + dst_channels[channel].area.first / 8 / 2; + src_step = src_channels[channel].area.step / 8 / 2; + dst_step = dst_channels[channel].area.step / 8 / 2; src_frames1 = src_frames; dst_frames1 = dst_frames; while (dst_frames1 > 0) { S1 = S2; if (src_frames1-- > 0) { - goto *get; -#define GET_S16_END after_get -#include "plugin_ops.h" -#undef GET_S16_END - after_get: - S2 = sample; + S1 = *src; src += src_step; } if (pos & ~R_MASK) { @@ -201,12 +171,7 @@ static void resample_shrink(struct snd_pcm_plugin *plugin, val = -32768; else if (val > 32767) val = 32767; - sample = val; - goto *put; -#define PUT_S16_END after_put -#include "plugin_ops.h" -#undef PUT_S16_END - after_put: + *dst = val; dst += dst_step; dst_frames1--; } @@ -346,8 +311,8 @@ int snd_pcm_plugin_build_rate(struct snd_pcm_substream *plug, snd_assert(src_format->channels == dst_format->channels, return -ENXIO); snd_assert(src_format->channels > 0, return -ENXIO); - snd_assert(snd_pcm_format_linear(src_format->format) != 0, return -ENXIO); - snd_assert(snd_pcm_format_linear(dst_format->format) != 0, return -ENXIO); + snd_assert(src_format->format == SNDRV_PCM_FORMAT_S16, return -ENXIO); + snd_assert(dst_format->format == SNDRV_PCM_FORMAT_S16, return -ENXIO); snd_assert(src_format->rate != dst_format->rate, return -ENXIO); err = snd_pcm_plugin_build(plug, "rate conversion", @@ -358,11 +323,6 @@ int snd_pcm_plugin_build_rate(struct snd_pcm_substream *plug, if (err < 0) return err; data = (struct rate_priv *)plugin->extra_data; - data->get = getput_index(src_format->format); - snd_assert(data->get >= 0 && data->get < 4*2*2, return -EINVAL); - data->put = getput_index(dst_format->format); - snd_assert(data->put >= 0 && data->put < 4*2*2, return -EINVAL); - if (src_format->rate < dst_format->rate) { data->pitch = ((src_format->rate << SHIFT) + (dst_format->rate >> 1)) / dst_format->rate; data->func = resample_expand; |