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pcm_export: use the byte_reverse library directly

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Delete the now-unused pcm_byteswap library, and optimize the
pcm_export_state object.
This commit is contained in:
Max Kellermann
2012-03-21 20:55:18 +01:00
parent 170635e3a6
commit 9ec9a8705e
8 changed files with 24 additions and 226 deletions
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75
src/pcm_byteswap.c
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@@ -1,75 +0,0 @@
/*
* Copyright (C) 2003-2012 The Music Player Daemon Project
* http://www.musicpd.org
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "config.h"
#include "pcm_byteswap.h"
#include "pcm_buffer.h"
#include "util/byte_reverse.h"
#include <assert.h>
const int16_t *pcm_byteswap_16(struct pcm_buffer *buffer,
const int16_t *src, size_t len)
{
int16_t *buf = pcm_buffer_get(buffer, len);
assert(buf != NULL);
const uint8_t *src8 = (const uint8_t *)src;
const void *src_end = src8 + len;
reverse_bytes_16((uint16_t *)buf, (const uint16_t *)src, src_end);
return buf;
}
const int32_t *pcm_byteswap_32(struct pcm_buffer *buffer,
const int32_t *src, size_t len)
{
int32_t *buf = pcm_buffer_get(buffer, len);
assert(buf != NULL);
const uint8_t *src8 = (const uint8_t *)src;
const void *src_end = src8 + len;
reverse_bytes_32((uint32_t *)buf, (const uint32_t *)src, src_end);
return buf;
}
const void *
pcm_byteswap(struct pcm_buffer *buffer, enum sample_format format,
const void *_src, size_t size)
{
const uint8_t *const src = _src;
if (size <= 1)
return src;
size_t sample_size = sample_format_size(format);
if (sample_size <= 1)
return src;
assert(size % sample_size == 0);
uint8_t *dest = pcm_buffer_get(buffer, size);
assert(dest != NULL);
reverse_bytes(dest, src, src + size, sample_size);
return dest;
}

67
src/pcm_byteswap.h
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@@ -1,67 +0,0 @@
/*
* Copyright (C) 2003-2011 The Music Player Daemon Project
* http://www.musicpd.org
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#ifndef MPD_PCM_BYTESWAP_H
#define MPD_PCM_BYTESWAP_H
#include "audio_format.h"
#include <stdint.h>
#include <stddef.h>
struct pcm_buffer;
/**
* Changes the endianness of 16 bit PCM data.
*
* @param buffer the destination pcm_buffer object
* @param src the source PCM buffer
* @param src_size the number of bytes in #src
* @return the destination buffer
*/
const int16_t *pcm_byteswap_16(struct pcm_buffer *buffer,
const int16_t *src, size_t len);
/**
* Changes the endianness of 32-bit (or 24-bit) PCM data.
*
* @param buffer the destination pcm_buffer object
* @param src the source PCM buffer
* @param src_size the number of bytes in #src
* @return the destination buffer
*/
const int32_t *pcm_byteswap_32(struct pcm_buffer *buffer,
const int32_t *src, size_t len);
/**
* Changes the endianness of PCM data.
*
* @param buffer the destination pcm_buffer object
* @param format the sample format (both input and output)
* @param src the source PCM buffer
* @param src_size the number of bytes in #src
* @return the destination buffer, or NULL if the sample format is not
* supported
*/
G_GNUC_MALLOC
const void *
pcm_byteswap(struct pcm_buffer *buffer, enum sample_format format,
const void *src, size_t size);
#endif

26
src/pcm_export.c
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@@ -19,7 +19,7 @@
#include "config.h"
#include "pcm_export.h"
#include "pcm_byteswap.h"
#include "util/byte_reverse.h"
void
pcm_export_init(struct pcm_export_state *state)
@@ -37,17 +37,31 @@ pcm_export_open(struct pcm_export_state *state,
enum sample_format sample_format,
bool reverse_endian)
{
state->sample_format = sample_format;
state->reverse_endian = reverse_endian;
state->reverse_endian = 0;
if (reverse_endian) {
size_t sample_size = sample_format_size(sample_format);
assert(sample_size <= 0xff);
if (sample_size > 1)
state->reverse_endian = sample_size;
}
}
const void *
pcm_export(struct pcm_export_state *state, const void *data, size_t size,
size_t *dest_size_r)
{
if (state->reverse_endian)
data = pcm_byteswap(&state->reverse_buffer,
state->sample_format, data, size);
if (state->reverse_endian > 0) {
assert(state->reverse_endian >= 2);
void *dest = pcm_buffer_get(&state->reverse_buffer, size);
assert(dest != NULL);
const uint8_t *src = data, *src_end = src + size;
reverse_bytes(dest, src, src_end, state->reverse_endian);
data = dest;
}
*dest_size_r = size;
return data;

8
src/pcm_export.h
View File

@@ -41,12 +41,12 @@ struct pcm_export_state {
*/
struct pcm_buffer reverse_buffer;
enum sample_format sample_format;
/**
* Export the samples in reverse byte order?
* Export the samples in reverse byte order? A non-zero value
* means the option is enabled and represents the size of each
* sample (2 or bigger).
*/
bool reverse_endian;
uint8_t reverse_endian;
};
/**