mirror of
https://github.com/alsa-project/alsa-lib.git
synced 2025-11-04 13:30:08 -05:00
Abramo Bagnara <abramo@alsa-project.org>
Sat, 11 Dec 1999 08:45:24 +0100 - changed lowlevel drivers to use pcm_misc.c functions - fixed some bugs in pcm_plugin_build - the plugin code is shared between alsa-lib and alsa-driver
This commit is contained in:
Jaroslav Kysela
parent
0f0ce09509
commit
20ebae20a7
13 changed files with 596 additions and 508 deletions
439
src/pcm/pcm_plugin_build.c
Normal file
439
src/pcm/pcm_plugin_build.c
Normal file
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@ -0,0 +1,439 @@
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/*
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* PCM Plug-In shared (kernel/library) code
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* Copyright (c) 1999 by Jaroslav Kysela <perex@suse.cz>
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*
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*
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* This library is free software; you can redistribute it and/or modify
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* it under the terms of the GNU Library General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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*/
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#ifdef __KERNEL__
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#define PLUGIN_DEBUG
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#include "../include/driver.h"
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#include "../include/pcm.h"
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typedef snd_pcm_runtime_t PLUGIN_BASE;
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#define snd_pcm_plugin_first(pb, channel) ((pb)->oss.plugin_first)
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#define snd_pcm_plugin_last(pb, channel) ((pb)->oss.plugin_last)
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#define snd_pcm_plugin_append(pb, channel, plugin) snd_pcm_oss_plugin_append(pb, plugin)
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#else
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#include <errno.h>
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#include "pcm_local.h"
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typedef snd_pcm_t PLUGIN_BASE;
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#endif
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ssize_t snd_pcm_plugin_transfer_size(PLUGIN_BASE *pb, int channel, size_t drv_size)
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{
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snd_pcm_plugin_t *plugin, *plugin_prev, *plugin_next;
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if (!pb || (channel != SND_PCM_CHANNEL_PLAYBACK &&
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channel != SND_PCM_CHANNEL_CAPTURE))
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return -EINVAL;
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if (drv_size == 0)
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return 0;
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if (drv_size < 0)
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return -EINVAL;
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if (channel == SND_PCM_CHANNEL_PLAYBACK) {
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plugin = snd_pcm_plugin_last(pb, channel);
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while (plugin) {
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plugin_prev = plugin->prev;
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if (plugin->src_size)
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drv_size = plugin->src_size(plugin, drv_size);
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plugin = plugin_prev;
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}
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} else if (channel == SND_PCM_CHANNEL_CAPTURE) {
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plugin = snd_pcm_plugin_first(pb, channel);
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while (plugin) {
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plugin_next = plugin->next;
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if (plugin->dst_size)
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drv_size = plugin->dst_size(plugin, drv_size);
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plugin = plugin_next;
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}
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}
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return drv_size;
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}
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ssize_t snd_pcm_plugin_hardware_size(PLUGIN_BASE *pb, int channel, size_t trf_size)
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{
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snd_pcm_plugin_t *plugin, *plugin_prev, *plugin_next;
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if (!pb || (channel != SND_PCM_CHANNEL_PLAYBACK &&
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channel != SND_PCM_CHANNEL_CAPTURE))
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return -EINVAL;
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if (trf_size == 0)
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return 0;
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if (trf_size < 0)
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return -EINVAL;
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if (channel == SND_PCM_CHANNEL_PLAYBACK) {
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plugin = snd_pcm_plugin_first(pb, channel);
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while (plugin) {
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plugin_next = plugin->next;
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if (plugin->dst_size)
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trf_size = plugin->dst_size(plugin, trf_size);
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plugin = plugin_next;
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}
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} else if (channel == SND_PCM_CHANNEL_CAPTURE) {
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plugin = snd_pcm_plugin_last(pb, channel);
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while (plugin) {
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plugin_prev = plugin->prev;
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if (plugin->src_size)
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trf_size = plugin->src_size(plugin, trf_size);
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plugin = plugin_prev;
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}
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}
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return trf_size;
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}
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unsigned int snd_pcm_plugin_formats(unsigned int formats)
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{
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formats |= SND_PCM_FMT_MU_LAW | SND_PCM_FMT_A_LAW | SND_PCM_FMT_IMA_ADPCM;
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if (formats & (SND_PCM_FMT_U8|SND_PCM_FMT_S8|
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SND_PCM_FMT_U16_LE|SND_PCM_FMT_S16_LE))
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formats |= SND_PCM_FMT_U8|SND_PCM_FMT_S8|
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SND_PCM_FMT_U16_LE|SND_PCM_FMT_S16_LE;
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return formats;
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}
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int snd_pcm_plugin_hwparams(snd_pcm_channel_params_t *params,
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snd_pcm_channel_info_t *hwinfo,
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snd_pcm_channel_params_t *hwparams)
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{
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memcpy(hwparams, params, sizeof(*hwparams));
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if ((hwinfo->formats & (1 << params->format.format)) == 0) {
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if ((snd_pcm_plugin_formats(hwinfo->formats) & (1 << params->format.format)) == 0)
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return -EINVAL;
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switch (params->format.format) {
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case SND_PCM_SFMT_U8:
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if (hwinfo->formats & SND_PCM_FMT_S8) {
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hwparams->format.format = SND_PCM_SFMT_S8;
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} else if (hwinfo->formats & SND_PCM_FMT_U16_LE) {
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hwparams->format.format = SND_PCM_SFMT_U16_LE;
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} else if (hwinfo->formats & SND_PCM_FMT_S16_LE) {
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hwparams->format.format = SND_PCM_SFMT_S16_LE;
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} else {
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return -EINVAL;
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}
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break;
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case SND_PCM_SFMT_S8:
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if (hwinfo->formats & SND_PCM_FMT_U8) {
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hwparams->format.format = SND_PCM_SFMT_U8;
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} else if (hwinfo->formats & SND_PCM_FMT_S16_LE) {
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hwparams->format.format = SND_PCM_SFMT_S16_LE;
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} else if (hwinfo->formats & SND_PCM_FMT_U16_LE) {
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hwparams->format.format = SND_PCM_SFMT_U16_LE;
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} else {
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return -EINVAL;
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}
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break;
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case SND_PCM_SFMT_S16_LE:
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if (hwinfo->formats & SND_PCM_FMT_U16_LE) {
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hwparams->format.format = SND_PCM_SFMT_U16_LE;
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} else if (hwinfo->formats & SND_PCM_FMT_S8) {
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hwparams->format.format = SND_PCM_SFMT_S8;
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} else if (hwinfo->formats & SND_PCM_FMT_U8) {
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hwparams->format.format = SND_PCM_SFMT_U8;
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} else {
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return -EINVAL;
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}
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break;
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case SND_PCM_SFMT_U16_LE:
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if (hwinfo->formats & SND_PCM_FMT_S16_LE) {
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hwparams->format.format = SND_PCM_SFMT_S16_LE;
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} else if (hwinfo->formats & SND_PCM_FMT_U8) {
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hwparams->format.format = SND_PCM_SFMT_U8;
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} else if (hwinfo->formats & SND_PCM_FMT_S8) {
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hwparams->format.format = SND_PCM_SFMT_S8;
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} else {
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return -EINVAL;
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}
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break;
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case SND_PCM_SFMT_MU_LAW:
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if (hwinfo->formats & SND_PCM_FMT_S16_LE) {
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hwparams->format.format = SND_PCM_SFMT_S16_LE;
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} else if (hwinfo->formats & SND_PCM_FMT_U16_LE) {
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hwparams->format.format = SND_PCM_SFMT_U16_LE;
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} else if (hwinfo->formats & SND_PCM_FMT_S8) {
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hwparams->format.format = SND_PCM_SFMT_S8;
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} else if (hwinfo->formats & SND_PCM_FMT_U8) {
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hwparams->format.format = SND_PCM_SFMT_U8;
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} else {
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return -EINVAL;
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}
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break;
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#ifndef __KERNEL__
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case SND_PCM_SFMT_A_LAW:
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if (hwinfo->formats & SND_PCM_FMT_S16_LE) {
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hwparams->format.format = SND_PCM_SFMT_S16_LE;
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} else if (hwinfo->formats & SND_PCM_FMT_U16_LE) {
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hwparams->format.format = SND_PCM_SFMT_U16_LE;
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} else if (hwinfo->formats & SND_PCM_FMT_S8) {
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hwparams->format.format = SND_PCM_SFMT_S8;
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} else if (hwinfo->formats & SND_PCM_FMT_U8) {
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hwparams->format.format = SND_PCM_SFMT_U8;
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} else {
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return -EINVAL;
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}
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case SND_PCM_SFMT_IMA_ADPCM:
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if (hwinfo->formats & SND_PCM_FMT_S16_LE) {
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hwparams->format.format = SND_PCM_SFMT_S16_LE;
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} else if (hwinfo->formats & SND_PCM_FMT_U16_LE) {
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hwparams->format.format = SND_PCM_SFMT_U16_LE;
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} else if (hwinfo->formats & SND_PCM_FMT_S8) {
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hwparams->format.format = SND_PCM_SFMT_S8;
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} else if (hwinfo->formats & SND_PCM_FMT_U8) {
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hwparams->format.format = SND_PCM_SFMT_U8;
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} else {
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return -EINVAL;
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}
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break;
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#endif
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default:
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return -EINVAL;
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}
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}
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/* voices */
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if (params->format.voices < hwinfo->min_voices ||
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params->format.voices > hwinfo->max_voices) {
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int dst_voices = params->format.voices < hwinfo->min_voices ?
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hwinfo->min_voices : hwinfo->max_voices;
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if ((params->format.rate < hwinfo->min_rate ||
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params->format.rate > hwinfo->max_rate) &&
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dst_voices > 2)
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dst_voices = 2;
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hwparams->format.voices = dst_voices;
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}
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/* rate */
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if (params->format.rate < hwinfo->min_rate ||
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params->format.rate > hwinfo->max_rate) {
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int dst_rate = params->format.rate < hwinfo->min_rate ?
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hwinfo->min_rate : hwinfo->max_rate;
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hwparams->format.rate = dst_rate;
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}
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/* interleave */
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if (!(hwinfo->flags & SND_PCM_CHNINFO_INTERLEAVE))
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hwparams->format.interleave = 0;
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if (!(hwinfo->flags & SND_PCM_CHNINFO_NONINTERLEAVE))
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hwparams->format.interleave = 1;
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return 0;
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}
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int snd_pcm_plugin_format(PLUGIN_BASE *pb,
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snd_pcm_channel_params_t *params,
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snd_pcm_channel_params_t *hwparams,
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snd_pcm_channel_info_t *hwinfo)
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{
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snd_pcm_channel_params_t srcparams, tmpparams;
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snd_pcm_channel_params_t *dstparams;
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snd_pcm_plugin_t *plugin;
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int err;
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if (params->channel == SND_PCM_CHANNEL_PLAYBACK) {
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memcpy(&srcparams, params, sizeof(srcparams));
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memcpy(&tmpparams, params, sizeof(tmpparams));
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dstparams = hwparams;
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} else {
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memcpy(&srcparams, &hwparams, sizeof(srcparams));
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memcpy(&tmpparams, &hwparams, sizeof(tmpparams));
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dstparams = params;
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}
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pdprintf("srcparams: interleave=%i, format=%i, rate=%i, voices=%i\n",
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srcparams.format.interleave,
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srcparams.format.format,
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srcparams.format.rate,
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srcparams.format.voices);
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pdprintf("dstparams: interleave=%i, format=%i, rate=%i, voices=%i\n",
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dstparams->format.interleave,
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dstparams->format.format,
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dstparams->format.rate,
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dstparams->format.voices);
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/* Convert to interleaved format if needed */
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if (!srcparams.format.interleave &&
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(srcparams.format.voices != dstparams->format.voices ||
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(srcparams.format.rate != dstparams->format.rate &&
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srcparams.format.voices > 1))) {
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tmpparams.format.interleave = 1;
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err = snd_pcm_plugin_build_interleave(&srcparams.format,
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&tmpparams.format,
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&plugin);
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pdprintf("params interleave change: src=%i, dst=%i returns %i\n", srcparams.format.interleave, tmpparams.format.interleave, err);
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if (err < 0) {
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snd_pcm_plugin_free(plugin);
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return err;
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}
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err = snd_pcm_plugin_append(pb, params->channel, plugin);
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if (err < 0) {
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snd_pcm_plugin_free(plugin);
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return err;
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}
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srcparams.format.interleave = 1;
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/* Avoid useless interleave revert */
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if (params->channel == SND_PCM_CHANNEL_PLAYBACK &&
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(hwinfo->flags & SND_PCM_CHNINFO_INTERLEAVE))
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dstparams->format.interleave = 1;
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}
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/* voices reduction */
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if (srcparams.format.voices > dstparams->format.voices) {
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tmpparams.format.voices = dstparams->format.voices;
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err = snd_pcm_plugin_build_voices(&srcparams.format,
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&tmpparams.format,
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&plugin);
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pdprintf("params voices reduction: src=%i, dst=%i returns %i\n", srcparams.format.voices, tmpparams.format.voices, err);
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if (err < 0) {
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snd_pcm_plugin_free(plugin);
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return err;
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}
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err = snd_pcm_plugin_append(pb, params->channel, plugin);
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if (err < 0) {
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snd_pcm_plugin_free(plugin);
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return err;
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}
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srcparams.format.voices = dstparams->format.voices;
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}
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/* rate down resampling */
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if (srcparams.format.rate > dstparams->format.rate &&
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snd_pcm_format_linear(srcparams.format.format) &&
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snd_pcm_format_width(srcparams.format.format) <= 16 &&
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snd_pcm_format_width(srcparams.format.format) >= snd_pcm_format_width(srcparams.format.format)) {
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tmpparams.format.rate = dstparams->format.rate;
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err = snd_pcm_plugin_build_rate(&srcparams.format,
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&tmpparams.format,
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&plugin);
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pdprintf("params rate down resampling: src=%i, dst=%i\n returns %i", srcparams.format.rate, tmpparams.format.rate, err);
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if (err < 0) {
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snd_pcm_plugin_free(plugin);
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return err;
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}
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err = snd_pcm_plugin_append(pb, params->channel, plugin);
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if (err < 0) {
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snd_pcm_plugin_free(plugin);
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return err;
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}
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srcparams.format.rate = dstparams->format.rate;
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}
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|
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/* format change */
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if (srcparams.format.format != dstparams->format.format) {
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tmpparams.format.format = dstparams->format.format;
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switch (srcparams.format.format) {
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case SND_PCM_SFMT_MU_LAW:
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err = snd_pcm_plugin_build_mulaw(&srcparams.format,
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&tmpparams.format,
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&plugin);
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break;
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#ifndef __KERNEL__
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case SND_PCM_SFMT_A_LAW:
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err = snd_pcm_plugin_build_alaw(&srcparams.format,
|
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&tmpparams.format,
|
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&plugin);
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break;
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case SND_PCM_SFMT_IMA_ADPCM:
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err = snd_pcm_plugin_build_adpcm(&srcparams.format,
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&tmpparams.format,
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&plugin);
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break;
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#endif
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default:
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err = snd_pcm_plugin_build_linear(&srcparams.format,
|
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&tmpparams.format,
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&plugin);
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}
|
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pdprintf("params format change: src=%i, dst=%i returns %i\n", srcparams.format.format, tmpparams.format.format, err);
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if (err < 0)
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return err;
|
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err = snd_pcm_plugin_append(pb, params->channel, plugin);
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if (err < 0) {
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snd_pcm_plugin_free(plugin);
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return err;
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}
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srcparams.format.format = dstparams->format.format;
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}
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/* rate resampling */
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if (srcparams.format.rate != dstparams->format.rate) {
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tmpparams.format.rate = dstparams->format.rate;
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err = snd_pcm_plugin_build_rate(&srcparams.format,
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&tmpparams.format,
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&plugin);
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pdprintf("params rate resampling: src=%i, dst=%i return %i\n", srcparams.format.rate, tmpparams.format.rate, err);
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if (err < 0) {
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snd_pcm_plugin_free(plugin);
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return err;
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}
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err = snd_pcm_plugin_append(pb, params->channel, plugin);
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if (err < 0) {
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snd_pcm_plugin_free(plugin);
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return err;
|
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}
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srcparams.format.rate = dstparams->format.rate;
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}
|
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|
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/* voices extension */
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if (srcparams.format.voices != dstparams->format.voices) {
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tmpparams.format.voices = dstparams->format.voices;
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err = snd_pcm_plugin_build_voices(&srcparams.format,
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&tmpparams.format,
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&plugin);
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pdprintf("params voices extension: src=%i, dst=%i returns %i\n", srcparams.format.voices, tmpparams.format.voices, err);
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if (err < 0) {
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snd_pcm_plugin_free(plugin);
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return err;
|
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}
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err = snd_pcm_plugin_append(pb, params->channel, plugin);
|
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if (err < 0) {
|
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snd_pcm_plugin_free(plugin);
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return err;
|
||||
}
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srcparams.format.voices = dstparams->format.voices;
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}
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|
||||
/* interleave change */
|
||||
if (dstparams->format.voices > 1 &&
|
||||
hwinfo->mode == SND_PCM_MODE_BLOCK &&
|
||||
srcparams.format.interleave != dstparams->format.interleave) {
|
||||
tmpparams.format.interleave = dstparams->format.interleave;
|
||||
err = snd_pcm_plugin_build_interleave(&srcparams.format,
|
||||
&tmpparams.format,
|
||||
&plugin);
|
||||
pdprintf("params interleave change: src=%i, dst=%i return %i\n", srcparams.format.interleave, tmpparams.format.interleave, err);
|
||||
if (err < 0) {
|
||||
snd_pcm_plugin_free(plugin);
|
||||
return err;
|
||||
}
|
||||
err = snd_pcm_plugin_append(pb, params->channel, plugin);
|
||||
if (err < 0) {
|
||||
snd_pcm_plugin_free(plugin);
|
||||
return err;
|
||||
}
|
||||
srcparams.format.interleave = dstparams->format.interleave;
|
||||
}
|
||||
if (srcparams.format.interleave != dstparams->format.interleave &&
|
||||
srcparams.format.voices > 1)
|
||||
return -EINVAL;
|
||||
if (srcparams.format.format != dstparams->format.format)
|
||||
return -EINVAL;
|
||||
if (srcparams.format.rate != dstparams->format.rate)
|
||||
return -EINVAL;
|
||||
if (srcparams.format.voices != dstparams->format.voices)
|
||||
return -EINVAL;
|
||||
return 0;
|
||||
}
|
||||
Loading…
Add table
Add a link
Reference in a new issue