mirror of
https://github.com/alsa-project/alsa-lib.git
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Completed linear plugin
This commit is contained in:
Abramo Bagnara
parent
cde18e13bc
commit
8738da23d8
2 changed files with 265 additions and 306 deletions
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@ -23,6 +23,8 @@
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#include "../../include/driver.h"
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#include "../../include/pcm.h"
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#include "../../include/pcm_plugin.h"
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#define bswap_16(x) __swab16((x))
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#define bswap_32(x) __swab32((x))
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#else
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#include <stdio.h>
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#include <stdlib.h>
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@ -38,101 +40,152 @@
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* Basic linear conversion plugin
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*/
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typedef enum {
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_8BIT_16BIT,
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_8BIT_24BIT,
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_8BIT_32BIT,
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_16BIT_8BIT,
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_16BIT_24BIT,
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_16BIT_32BIT,
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_24BIT_8BIT,
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_24BIT_16BIT,
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_24BIT_32BIT,
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_32BIT_8BIT,
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_32BIT_16BIT,
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_32BIT_24BIT
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} combination_t;
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typedef enum {
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NONE = 0,
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SOURCE = 1,
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DESTINATION = 2,
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BOTH = 3,
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SIGN = 4,
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SIGN_NONE = 4,
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SIGN_SOURCE = 5,
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SIGN_DESTINATION = 6,
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SIGN_BOTH = 7,
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} endian_t;
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typedef void (*conv_f)(void *src, void *dst, size_t size);
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struct linear_private_data {
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combination_t cmd;
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endian_t endian;
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int src_sample_size, dst_sample_size;
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conv_f func;
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};
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static void linear_conv_8bit_16bit(unsigned char *src_ptr,
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unsigned short *dst_ptr,
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size_t size)
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{
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while (size--)
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*dst_ptr++ = ((unsigned short)*src_ptr++) << 8;
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#define CONV_FUNC(name, srctype, dsttype, val) \
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static void conv_##name(void *src_ptr, void *dst_ptr, size_t size) \
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{ \
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unsigned srctype *srcp = src_ptr; \
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unsigned dsttype *dstp = dst_ptr; \
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while (size--) { \
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unsigned srctype src = *srcp++; \
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*dstp++ = val; \
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} \
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}
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static void linear_conv_8bit_16bit_swap(unsigned char *src_ptr,
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unsigned short *dst_ptr,
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size_t size)
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{
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while (size--)
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*dst_ptr++ = (unsigned short)*src_ptr++;
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}
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CONV_FUNC(8_sign, char, char, src ^ 0x80)
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static void linear_conv_sign_8bit_16bit(unsigned char *src_ptr,
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unsigned short *dst_ptr,
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size_t size)
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{
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while (size--)
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*dst_ptr++ = (((unsigned short)*src_ptr++) << 8) ^ 0x8000;
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}
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CONV_FUNC(8_16, char, short, (unsigned short)src << 8)
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CONV_FUNC(8_16_end, char, short, (unsigned short)src)
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CONV_FUNC(8_16_sign, char, short, (unsigned short)(src ^ 0x80) << 8)
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CONV_FUNC(8_16_sign_end, char, short, (unsigned short)src ^ 0x80)
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static void linear_conv_sign_8bit_16bit_swap(unsigned char *src_ptr,
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unsigned short *dst_ptr,
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size_t size)
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{
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while (size--)
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*dst_ptr++ = ((unsigned short)*src_ptr++) ^ 0x80;
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}
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CONV_FUNC(8_32, char, long, (unsigned long)src << 24)
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CONV_FUNC(8_32_end, char, long, (unsigned long)src)
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CONV_FUNC(8_32_sign, char, long, (unsigned long)(src ^ 0x80) << 24)
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CONV_FUNC(8_32_sign_end, char, long, (unsigned long)src ^ 0x80)
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static void linear_conv_16bit_8bit(unsigned short *src_ptr,
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unsigned char *dst_ptr,
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size_t size)
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{
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while (size--)
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*dst_ptr++ = (*src_ptr++) >> 8;
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}
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CONV_FUNC(16_8, short, char, src >> 8)
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CONV_FUNC(16_end_8, short, char, src)
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CONV_FUNC(16_8_sign, short, char, (src >> 8) ^ 0x80)
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CONV_FUNC(16_end_8_sign, short, char, src ^ 0x80;)
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static void linear_conv_16bit_8bit_swap(unsigned short *src_ptr,
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unsigned char *dst_ptr,
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size_t size)
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{
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while (size--)
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*dst_ptr++ = (unsigned char)*src_ptr++;
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}
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CONV_FUNC(16_sign, short, short, src ^ 0x8000)
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CONV_FUNC(16_end, short, short, bswap_16(src))
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CONV_FUNC(16_end_sign, short, short, bswap_16(src) ^ 0x8000)
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CONV_FUNC(16_sign_end, short, short, bswap_16(src ^ 0x8000))
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CONV_FUNC(16_end_sign_end, short, short, src ^ 0x80)
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static void linear_conv_sign_16bit_8bit(unsigned short *src_ptr,
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unsigned char *dst_ptr,
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size_t size)
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{
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while (size--)
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*dst_ptr++ = (((unsigned short)*src_ptr++) >> 8) ^ 0x80;
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}
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CONV_FUNC(16_32, short, long, (unsigned long)src << 16)
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CONV_FUNC(16_32_sign, short, long, (unsigned long)(src ^ 0x8000) << 16)
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CONV_FUNC(16_32_end, short, long, (unsigned long)bswap_16(src))
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CONV_FUNC(16_32_sign_end, short, long, (unsigned long)bswap_16(src ^ 0x8000))
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CONV_FUNC(16_end_32, short, long, (unsigned long)bswap_16(src) << 16)
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CONV_FUNC(16_end_32_sign, short, long, (unsigned long)(bswap_16(src) ^ 0x8000) << 16)
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CONV_FUNC(16_end_32_end, short, long, (unsigned long)src)
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CONV_FUNC(16_end_32_sign_end, short, long, (unsigned long)src ^ 0x80)
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CONV_FUNC(32_8, long, char, src >> 24)
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CONV_FUNC(32_end_8, long, char, src)
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CONV_FUNC(32_8_sign, long, char, (src >> 24) ^ 0x80)
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CONV_FUNC(32_end_8_sign, long, char, src ^ 0x80;)
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CONV_FUNC(32_16, long, short, src >> 16)
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CONV_FUNC(32_16_sign, long, short, (src >> 16) ^ 0x8000)
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CONV_FUNC(32_16_end, long, short, bswap_16(src >> 16))
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CONV_FUNC(32_16_sign_end, long, short, bswap_16((src >> 16) ^ 0x8000))
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CONV_FUNC(32_end_16, long, short, bswap_16(src))
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CONV_FUNC(32_end_16_sign, long, short, bswap_16(src) ^ 0x8000)
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CONV_FUNC(32_end_16_end, long, short, src)
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CONV_FUNC(32_end_16_sign_end, long, short, src ^ 0x80)
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CONV_FUNC(32_sign, long, long, src ^ 0x80000000)
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CONV_FUNC(32_end, long, long, bswap_32(src))
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CONV_FUNC(32_end_sign, long, long, bswap_32(src) ^ 0x80000000)
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CONV_FUNC(32_sign_end, long, long, bswap_32(src) ^ 0x80)
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CONV_FUNC(32_end_sign_end, long, long, src ^ 0x80)
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/* src_wid dst_wid src_endswap, dst_endswap, sign_swap */
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conv_f convert_functions[3][3][2][2][2] = {
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NULL, /* 8->8: Nothing to do */
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conv_8_sign, /* 8->8 sign: conv_8_sign */
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NULL, /* 8->8 dst_end: Nothing to do */
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conv_8_sign, /* 8->8 dst_end sign: conv_8_sign */
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NULL, /* 8->8 src_end: Nothing to do */
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conv_8_sign, /* 8->8 src_end sign: conv_8_sign */
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NULL, /* 8->8 src_end dst_end: Nothing to do */
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conv_8_sign, /* 8->8 src_end dst_end sign: conv_8_sign */
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conv_8_16, /* 8->16: conv_8_16 */
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conv_8_16_sign, /* 8->16 sign: conv_8_16_sign */
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conv_8_16_end, /* 8->16 dst_end: conv_8_16_end */
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conv_8_16_sign_end, /* 8->16 dst_end sign: conv_8_16_sign_end */
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conv_8_16, /* 8->16 src_end: conv_8_16 */
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conv_8_16_sign, /* 8->16 src_end sign: conv_8_16_sign */
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conv_8_16_end, /* 8->16 src_end dst_end: conv_8_16_end */
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conv_8_16_sign_end, /* 8->16 src_end dst_end sign: conv_8_16_sign_end */
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conv_8_32, /* 8->32: conv_8_32 */
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conv_8_32_sign, /* 8->32 sign: conv_8_32_sign */
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conv_8_32_end, /* 8->32 dst_end: conv_8_32_end */
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conv_8_32_sign_end, /* 8->32 dst_end sign: conv_8_32_sign_end */
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conv_8_32, /* 8->32 src_end: conv_8_32 */
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conv_8_32_sign, /* 8->32 src_end sign: conv_8_32_sign */
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conv_8_32_end, /* 8->32 src_end dst_end: conv_8_32_end */
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conv_8_32_sign_end, /* 8->32 src_end dst_end sign: conv_8_32_sign_end */
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conv_16_8, /* 16->8: conv_16_8 */
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conv_16_8_sign, /* 16->8 sign: conv_16_8_sign */
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conv_16_8, /* 16->8 dst_end: conv_16_8 */
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conv_16_8_sign, /* 16->8 dst_end sign: conv_16_8_sign */
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conv_16_end_8, /* 16->8 src_end: conv_16_end_8 */
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conv_16_end_8_sign, /* 16->8 src_end sign: conv_16_end_8_sign */
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conv_16_end_8, /* 16->8 src_end dst_end: conv_16_end_8 */
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conv_16_end_8_sign, /* 16->8 src_end dst_end sign: conv_16_end_8_sign */
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NULL, /* 16->16: Nothing to do */
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conv_16_sign, /* 16->16 sign: conv_16_sign */
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conv_16_end, /* 16->16 dst_end: conv_16_end */
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conv_16_sign_end, /* 16->16 dst_end sign: conv_16_sign_end */
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conv_16_end, /* 16->16 src_end: conv_16_end */
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conv_16_end_sign, /* 16->16 src_end sign: conv_16_end_sign */
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NULL, /* 16->16 src_end dst_end: Nothing to do */
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conv_16_end_sign_end, /* 16->16 src_end dst_end sign: conv_16_end_sign_end */
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conv_16_32, /* 16->32: conv_16_32 */
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conv_16_32_sign, /* 16->32 sign: conv_16_32_sign */
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conv_16_32_end, /* 16->32 dst_end: conv_16_32_end */
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conv_16_32_sign_end, /* 16->32 dst_end sign: conv_16_32_sign_end */
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conv_16_end_32, /* 16->32 src_end: conv_16_end_32 */
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conv_16_end_32_sign, /* 16->32 src_end sign: conv_16_end_32_sign */
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conv_16_end_32_end, /* 16->32 src_end dst_end: conv_16_end_32_end */
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conv_16_end_32_sign_end,/* 16->32 src_end dst_end sign: conv_16_end_32_sign_end */
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conv_32_8, /* 32->8: conv_32_8 */
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conv_32_8_sign, /* 32->8 sign: conv_32_8_sign */
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conv_32_8, /* 32->8 dst_end: conv_32_8 */
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conv_32_8_sign, /* 32->8 dst_end sign: conv_32_8_sign */
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conv_32_end_8, /* 32->8 src_end: conv_32_end_8 */
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conv_32_end_8_sign, /* 32->8 src_end sign: conv_32_end_8_sign */
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conv_32_end_8, /* 32->8 src_end dst_end: conv_32_end_8 */
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conv_32_end_8_sign, /* 32->8 src_end dst_end sign: conv_32_end_8_sign */
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conv_32_16, /* 32->16: conv_32_16 */
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conv_32_16_sign, /* 32->16 sign: conv_32_16_sign */
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conv_32_16_end, /* 32->16 dst_end: conv_32_16_end */
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conv_32_16_sign_end, /* 32->16 dst_end sign: conv_32_16_sign_end */
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conv_32_end_16, /* 32->16 src_end: conv_32_end_16 */
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conv_32_end_16_sign, /* 32->16 src_end sign: conv_32_end_16_sign */
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conv_32_end_16_end, /* 32->16 src_end dst_end: conv_32_end_16_end */
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conv_32_end_16_sign_end,/* 32->16 src_end dst_end sign: conv_32_end_16_sign_end */
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NULL, /* 32->32: Nothing to do */
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conv_32_sign, /* 32->32 sign: conv_32_sign */
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conv_32_end, /* 32->32 dst_end: conv_32_end */
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conv_32_sign_end, /* 32->32 dst_end sign: conv_32_sign_end */
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conv_32_end, /* 32->32 src_end: conv_32_end */
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conv_32_end_sign, /* 32->32 src_end sign: conv_32_end_sign */
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NULL, /* 32->32 src_end dst_end: Nothing to do */
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conv_32_end_sign_end /* 32->32 src_end dst_end sign: conv_32_end_sign_end */
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};
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static void linear_conv_sign_16bit_8bit_swap(unsigned short *src_ptr,
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unsigned char *dst_ptr,
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size_t size)
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{
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while (size--)
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*dst_ptr++ = ((unsigned char)*src_ptr++) ^ 0x80;
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}
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static ssize_t linear_transfer(snd_pcm_plugin_t *plugin,
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char *src_ptr, size_t src_size,
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@ -148,51 +201,12 @@ static ssize_t linear_transfer(snd_pcm_plugin_t *plugin,
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data = (struct linear_private_data *)snd_pcm_plugin_extra_data(plugin);
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if (data == NULL)
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return -EINVAL;
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switch (data->cmd) {
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case _8BIT_16BIT:
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if ((dst_size >> 1) < src_size)
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return -EINVAL;
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switch (data->endian) {
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case NONE:
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linear_conv_8bit_16bit(src_ptr, (short *)dst_ptr, src_size);
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break;
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case DESTINATION:
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linear_conv_8bit_16bit_swap(src_ptr, (short *)dst_ptr, src_size);
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break;
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case SIGN_NONE:
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linear_conv_sign_8bit_16bit(src_ptr, (short *)dst_ptr, src_size);
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break;
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case SIGN_DESTINATION:
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linear_conv_sign_8bit_16bit_swap(src_ptr, (short *)dst_ptr, src_size);
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break;
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default:
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return -EINVAL;
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}
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return src_size << 1;
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case _16BIT_8BIT:
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if (dst_size < (src_size >> 1))
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return -EINVAL;
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src_size >>= 1;
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switch (data->endian) {
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case NONE:
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linear_conv_16bit_8bit((short *)src_ptr, dst_ptr, src_size);
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break;
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case SOURCE:
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linear_conv_16bit_8bit_swap((short *)src_ptr, dst_ptr, src_size);
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break;
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case SIGN_NONE:
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linear_conv_sign_16bit_8bit((short *)src_ptr, dst_ptr, src_size);
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break;
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case SIGN_SOURCE:
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linear_conv_sign_16bit_8bit_swap((short *)src_ptr, dst_ptr, src_size);
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break;
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default:
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return -EINVAL;
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}
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return src_size;
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default:
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return -EIO;
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}
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if (src_size % data->src_sample_size != 0)
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return -EINVAL;
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if (dst_size < src_size*data->dst_sample_size/data->src_sample_size)
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return -EINVAL;
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data->func(src_ptr, dst_ptr, src_size / data->src_sample_size);
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return src_size*data->dst_sample_size/data->src_sample_size;
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}
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static ssize_t linear_src_size(snd_pcm_plugin_t *plugin, size_t size)
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@ -202,27 +216,9 @@ static ssize_t linear_src_size(snd_pcm_plugin_t *plugin, size_t size)
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if (!plugin || size <= 0)
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return -EINVAL;
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data = (struct linear_private_data *)snd_pcm_plugin_extra_data(plugin);
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switch (data->cmd) {
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case _8BIT_16BIT:
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case _16BIT_24BIT:
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case _16BIT_32BIT:
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return size / 2;
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case _8BIT_24BIT:
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case _8BIT_32BIT:
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return size / 4;
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case _16BIT_8BIT:
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case _24BIT_16BIT:
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case _32BIT_16BIT:
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return size * 2;
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case _24BIT_8BIT:
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case _32BIT_8BIT:
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return size * 4;
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case _24BIT_32BIT:
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case _32BIT_24BIT:
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return size;
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default:
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return -EIO;
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}
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if (data == NULL)
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return -EINVAL;
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return size*data->src_sample_size/data->dst_sample_size;
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}
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static ssize_t linear_dst_size(snd_pcm_plugin_t *plugin, size_t size)
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@ -232,27 +228,9 @@ static ssize_t linear_dst_size(snd_pcm_plugin_t *plugin, size_t size)
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if (!plugin || size <= 0)
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return -EINVAL;
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data = (struct linear_private_data *)snd_pcm_plugin_extra_data(plugin);
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switch (data->cmd) {
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case _8BIT_16BIT:
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case _16BIT_24BIT:
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case _16BIT_32BIT:
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return size * 2;
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case _8BIT_24BIT:
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case _8BIT_32BIT:
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return size * 4;
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case _16BIT_8BIT:
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case _24BIT_16BIT:
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case _32BIT_16BIT:
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return size / 2;
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case _24BIT_8BIT:
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case _32BIT_8BIT:
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return size / 4;
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case _24BIT_32BIT:
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case _32BIT_24BIT:
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return size;
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default:
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return -EIO;
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}
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if (data == NULL)
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return -EINVAL;
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return size*data->dst_sample_size/data->src_sample_size;
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}
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int snd_pcm_plugin_build_linear(snd_pcm_format_t *src_format,
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@ -261,8 +239,8 @@ int snd_pcm_plugin_build_linear(snd_pcm_format_t *src_format,
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{
|
||||
struct linear_private_data *data;
|
||||
snd_pcm_plugin_t *plugin;
|
||||
combination_t cmd;
|
||||
int width1, width2, endian1, endian2, sign1, sign2;
|
||||
conv_f func;
|
||||
int src_endian, dst_endian, sign, src_width, dst_width;
|
||||
|
||||
if (!r_plugin)
|
||||
return -EINVAL;
|
||||
|
|
@ -279,69 +257,66 @@ int snd_pcm_plugin_build_linear(snd_pcm_format_t *src_format,
|
|||
snd_pcm_format_linear(dst_format->format)))
|
||||
return -EINVAL;
|
||||
|
||||
width1 = snd_pcm_format_width(src_format->format);
|
||||
sign1 = snd_pcm_format_signed(src_format->format);
|
||||
width2 = snd_pcm_format_width(dst_format->format);
|
||||
sign2 = snd_pcm_format_signed(dst_format->format);
|
||||
sign = (snd_pcm_format_signed(src_format->format) !=
|
||||
snd_pcm_format_signed(dst_format->format));
|
||||
src_width = snd_pcm_format_width(src_format->format);
|
||||
dst_width = snd_pcm_format_width(dst_format->format);
|
||||
#if __BYTE_ORDER == __LITTLE_ENDIAN
|
||||
endian1 = snd_pcm_format_little_endian(src_format->format);
|
||||
endian2 = snd_pcm_format_little_endian(dst_format->format);
|
||||
src_endian = snd_pcm_format_big_endian(src_format->format);
|
||||
dst_endian = snd_pcm_format_big_endian(dst_format->format);
|
||||
#elif __BYTE_ORDER == __BIG_ENDIAN
|
||||
endian1 = snd_pcm_format_big_endian(src_format->format);
|
||||
endian2 = snd_pcm_format_big_endian(dst_format->format);
|
||||
src_endian = snd_pcm_format_little_endian(src_format->format);
|
||||
dst_endian = snd_pcm_format_little_endian(dst_format->format);
|
||||
#else
|
||||
#error "Unsupported endian..."
|
||||
#endif
|
||||
cmd = _8BIT_16BIT;
|
||||
switch (width1) {
|
||||
|
||||
switch (src_width) {
|
||||
case 8:
|
||||
switch (width2) {
|
||||
case 16: cmd = _8BIT_16BIT; break;
|
||||
case 24: cmd = _8BIT_24BIT; break;
|
||||
case 32: cmd = _8BIT_32BIT; break;
|
||||
default: return -EINVAL;
|
||||
}
|
||||
src_width = 0;
|
||||
break;
|
||||
case 16:
|
||||
switch (width2) {
|
||||
case 8: cmd = _16BIT_8BIT; break;
|
||||
case 24: cmd = _16BIT_24BIT; break;
|
||||
case 32: cmd = _16BIT_32BIT; break;
|
||||
default: return -EINVAL;
|
||||
}
|
||||
break;
|
||||
case 24:
|
||||
switch (width2) {
|
||||
case 8: cmd = _24BIT_8BIT; break;
|
||||
case 16: cmd = _24BIT_16BIT; break;
|
||||
case 32: cmd = _24BIT_32BIT; break;
|
||||
default: return -EINVAL;
|
||||
}
|
||||
src_width = 1;
|
||||
break;
|
||||
case 32:
|
||||
switch (width2) {
|
||||
case 8: cmd = _32BIT_8BIT; break;
|
||||
case 16: cmd = _32BIT_16BIT; break;
|
||||
case 24: cmd = _32BIT_24BIT; break;
|
||||
default: return -EINVAL;
|
||||
}
|
||||
src_width = 2;
|
||||
break;
|
||||
default:
|
||||
return -EINVAL;
|
||||
}
|
||||
switch (dst_width) {
|
||||
case 8:
|
||||
dst_width = 0;
|
||||
break;
|
||||
case 16:
|
||||
dst_width = 1;
|
||||
break;
|
||||
case 32:
|
||||
dst_width = 2;
|
||||
break;
|
||||
default:
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
if (src_endian < 0)
|
||||
src_endian = 0;
|
||||
if (dst_endian < 0)
|
||||
src_endian = 0;
|
||||
|
||||
func = convert_functions[src_width][dst_width][src_endian][dst_endian][sign];
|
||||
|
||||
if (func == NULL)
|
||||
return -EINVAL;
|
||||
|
||||
plugin = snd_pcm_plugin_build("linear format conversion",
|
||||
sizeof(struct linear_private_data));
|
||||
if (plugin == NULL)
|
||||
return -ENOMEM;
|
||||
data = (struct linear_private_data *)snd_pcm_plugin_extra_data(plugin);
|
||||
data->cmd = cmd;
|
||||
data->endian = NONE;
|
||||
if (endian1 == 0)
|
||||
data->endian |= SOURCE;
|
||||
if (endian2 == 0)
|
||||
data->endian |= DESTINATION;
|
||||
if (sign1 != sign2)
|
||||
data->endian |= SIGN;
|
||||
data->func = func;
|
||||
data->src_sample_size = 1 << src_width;
|
||||
data->dst_sample_size = 1 << dst_width;
|
||||
|
||||
plugin->transfer = linear_transfer;
|
||||
plugin->src_size = linear_src_size;
|
||||
plugin->dst_size = linear_dst_size;
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue