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gstreamer/gst/audioconvert/audioconvert.c
René Stadler 6ac8ff9ec3 with some minor changes 
Original commit message from CVS:
Patch by: René Stadler <mail at renestadler dot de>
with some minor changes
* gst-libs/gst/floatcast/floatcast.h:
Use more efficient float endianness conversion functions that don't
involve 2 function calls per value.
* gst/audioconvert/audioconvert.c: (audio_convert_get_func_index),
(check_default), (audio_convert_prepare_context):
* gst/audioconvert/gstaudioconvert.c:
(gst_audio_convert_parse_caps), (make_lossless_changes):
Support non-native endianness floats as input and output.
Fixes #339838.
* tests/check/elements/audioconvert.c: (verify_convert),
(GST_START_TEST):
Add unit tests for the non-native endianness float conversions.
2007-03-29 18:42:34 +00:00

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/* GStreamer
* Copyright (C) 2005 Wim Taymans <wim at fluendo dot com>
*
* audioconvert.c: Convert audio to different audio formats automatically
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <string.h>
#include "gstchannelmix.h"
#include "audioconvert.h"
#include "gst/floatcast/floatcast.h"
/* int to float/double conversion: int2xxx(i) = 1 / (2^31-1) * i */
#define INT2FLOAT(i) (4.6566128752457969e-10 * ((gfloat)i))
#define INT2DOUBLE(i) (4.6566128752457969e-10 * ((gdouble)i))
/* sign bit in the intermediate format */
#define SIGNED (1U<<31)
/***
* unpack code
*/
#define MAKE_UNPACK_FUNC_NAME(name) \
audio_convert_unpack_##name
/* unpack from integer to signed integer 32 */
#define MAKE_UNPACK_FUNC_II(name, stride, sign, READ_FUNC) \
static void \
MAKE_UNPACK_FUNC_NAME (name) (guint8 *src, gint32 *dst, \
gint scale, gint count) \
{ \
for (;count; count--) { \
*dst++ = (((gint32) READ_FUNC (src)) << scale) ^ (sign); \
src+=stride; \
} \
}
/* unpack from float to signed integer 32 */
#define MAKE_UNPACK_FUNC_FI(name, type, READ_FUNC) \
static void \
MAKE_UNPACK_FUNC_NAME (name) (type * src, gint32 * dst, gint s, gint count) \
{ \
gdouble temp; \
\
for (; count; count--) { \
/* blow up to 32 bit */ \
temp = (READ_FUNC (*src++) * 2147483647.0) + 0.5; \
*dst++ = (gint32) CLAMP (temp, G_MININT32, G_MAXINT32); \
} \
}
/* unpack from float to float 64 (double) */
#define MAKE_UNPACK_FUNC_FF(name, type, FUNC) \
static void \
MAKE_UNPACK_FUNC_NAME (name) (type * src, gdouble * dst, gint s, \
gint count) \
{ \
for (; count; count--) \
*dst++ = (gdouble) FUNC (*src++); \
}
#define READ8(p) GST_READ_UINT8(p)
#define READ16_FROM_LE(p) GST_READ_UINT16_LE (p)
#define READ16_FROM_BE(p) GST_READ_UINT16_BE (p)
#define READ24_FROM_LE(p) (p[0] | (p[1] << 8) | (p[2] << 16))
#define READ24_FROM_BE(p) (p[2] | (p[1] << 8) | (p[0] << 16))
#define READ32_FROM_LE(p) GST_READ_UINT32_LE (p)
#define READ32_FROM_BE(p) GST_READ_UINT32_BE (p)
MAKE_UNPACK_FUNC_II (u8, 1, SIGNED, READ8);
MAKE_UNPACK_FUNC_II (s8, 1, 0, READ8);
MAKE_UNPACK_FUNC_II (u16_le, 2, SIGNED, READ16_FROM_LE);
MAKE_UNPACK_FUNC_II (s16_le, 2, 0, READ16_FROM_LE);
MAKE_UNPACK_FUNC_II (u16_be, 2, SIGNED, READ16_FROM_BE);
MAKE_UNPACK_FUNC_II (s16_be, 2, 0, READ16_FROM_BE);
MAKE_UNPACK_FUNC_II (u24_le, 3, SIGNED, READ24_FROM_LE);
MAKE_UNPACK_FUNC_II (s24_le, 3, 0, READ24_FROM_LE);
MAKE_UNPACK_FUNC_II (u24_be, 3, SIGNED, READ24_FROM_BE);
MAKE_UNPACK_FUNC_II (s24_be, 3, 0, READ24_FROM_BE);
MAKE_UNPACK_FUNC_II (u32_le, 4, SIGNED, READ32_FROM_LE);
MAKE_UNPACK_FUNC_II (s32_le, 4, 0, READ32_FROM_LE);
MAKE_UNPACK_FUNC_II (u32_be, 4, SIGNED, READ32_FROM_BE);
MAKE_UNPACK_FUNC_II (s32_be, 4, 0, READ32_FROM_BE);
MAKE_UNPACK_FUNC_FI (float_le, gfloat, GFLOAT_FROM_LE);
MAKE_UNPACK_FUNC_FI (float_be, gfloat, GFLOAT_FROM_BE);
MAKE_UNPACK_FUNC_FI (double_le, gdouble, GDOUBLE_FROM_LE);
MAKE_UNPACK_FUNC_FI (double_be, gdouble, GDOUBLE_FROM_BE);
MAKE_UNPACK_FUNC_FF (float_hq_le, gfloat, GFLOAT_FROM_LE);
MAKE_UNPACK_FUNC_FF (float_hq_be, gfloat, GFLOAT_FROM_BE);
MAKE_UNPACK_FUNC_FF (double_hq_le, gdouble, GDOUBLE_FROM_LE);
MAKE_UNPACK_FUNC_FF (double_hq_be, gdouble, GDOUBLE_FROM_BE);
/* One of the double_hq_* functions generated above is ineffecient, but it's
* never used anyway. The same is true for one of the s32_* functions. */
/***
* packing code
*/
#define MAKE_PACK_FUNC_NAME(name) \
audio_convert_pack_##name
/*
* These functions convert the signed 32 bit integers to the
* target format. For this to work the following steps are done:
*
* 1) If the output format is smaller than 32 bit we add 0.5LSB of
* the target format (i.e. 1<<(scale-1)) to get proper rounding.
* Shifting will result in rounding towards negative infinity (for
* signed values) or zero (for unsigned values). As we might overflow
* an overflow check is performed.
* Additionally, if our target format is signed and the value is smaller
* than zero we decrease it by one to round -X.5 downwards.
* This leads to the following rounding:
* -1.2 => -1 1.2 => 1
* -1.5 => -2 1.5 => 2
* -1.7 => -2 1.7 => 2
* 2) If the output format is unsigned we will XOR the sign bit. This
* will do the same as if we add 1<<31.
* 3) Afterwards we shift to the target depth. It's necessary to left-shift
* on signed values here to get arithmetical shifting.
* 4) This is then written into our target array by the corresponding write
* function for the target width.
*/
/* pack from signed integer 32 to integer */
#define MAKE_PACK_FUNC_II(name, stride, sign, WRITE_FUNC) \
static void \
MAKE_PACK_FUNC_NAME (name) (gint32 *src, gpointer dst, \
gint scale, gint count) \
{ \
guint8 *p = (guint8 *)dst; \
gint32 tmp; \
if (scale > 0) { \
guint32 bias = 1 << (scale - 1); \
for (;count; count--) { \
tmp = *src++; \
if (tmp > 0 && G_MAXINT32 - tmp < bias) \
tmp = G_MAXINT32; \
else \
tmp += bias; \
if (sign == 0 && tmp < 0) \
tmp--; \
tmp = ((tmp) ^ (sign)) >> scale; \
WRITE_FUNC (p, tmp); \
p+=stride; \
} \
} else { \
for (;count; count--) { \
tmp = (*src++ ^ (sign)); \
WRITE_FUNC (p, tmp); \
p+=stride; \
} \
} \
}
/* pack from signed integer 32 to float */
#define MAKE_PACK_FUNC_IF(name, type, FUNC, FUNC2) \
static void \
MAKE_PACK_FUNC_NAME (name) (gint32 * src, type * dst, gint scale, \
gint count) \
{ \
for (; count; count--) \
*dst++ = FUNC (FUNC2 (*src++)); \
}
/* pack from float 64 (double) to float */
#define MAKE_PACK_FUNC_FF(name, type, FUNC) \
static void \
MAKE_PACK_FUNC_NAME (name) (gdouble * src, type * dst, gint s, \
gint count) \
{ \
for (; count; count--) \
*dst++ = FUNC ((type) (*src++)); \
}
#define WRITE8(p, v) GST_WRITE_UINT8 (p, v)
#define WRITE16_TO_LE(p,v) GST_WRITE_UINT16_LE (p, (guint16)(v))
#define WRITE16_TO_BE(p,v) GST_WRITE_UINT16_BE (p, (guint16)(v))
#define WRITE24_TO_LE(p,v) p[0] = v & 0xff; p[1] = (v >> 8) & 0xff; p[2] = (v >> 16) & 0xff
#define WRITE24_TO_BE(p,v) p[2] = v & 0xff; p[1] = (v >> 8) & 0xff; p[0] = (v >> 16) & 0xff
#define WRITE32_TO_LE(p,v) GST_WRITE_UINT32_LE (p, (guint32)(v))
#define WRITE32_TO_BE(p,v) GST_WRITE_UINT32_BE (p, (guint32)(v))
MAKE_PACK_FUNC_II (u8, 1, SIGNED, WRITE8);
MAKE_PACK_FUNC_II (s8, 1, 0, WRITE8);
MAKE_PACK_FUNC_II (u16_le, 2, SIGNED, WRITE16_TO_LE);
MAKE_PACK_FUNC_II (s16_le, 2, 0, WRITE16_TO_LE);
MAKE_PACK_FUNC_II (u16_be, 2, SIGNED, WRITE16_TO_BE);
MAKE_PACK_FUNC_II (s16_be, 2, 0, WRITE16_TO_BE);
MAKE_PACK_FUNC_II (u24_le, 3, SIGNED, WRITE24_TO_LE);
MAKE_PACK_FUNC_II (s24_le, 3, 0, WRITE24_TO_LE);
MAKE_PACK_FUNC_II (u24_be, 3, SIGNED, WRITE24_TO_BE);
MAKE_PACK_FUNC_II (s24_be, 3, 0, WRITE24_TO_BE);
MAKE_PACK_FUNC_II (u32_le, 4, SIGNED, WRITE32_TO_LE);
MAKE_PACK_FUNC_II (s32_le, 4, 0, WRITE32_TO_LE);
MAKE_PACK_FUNC_II (u32_be, 4, SIGNED, WRITE32_TO_BE);
MAKE_PACK_FUNC_II (s32_be, 4, 0, WRITE32_TO_BE);
MAKE_PACK_FUNC_IF (float_le, gfloat, GFLOAT_TO_LE, INT2FLOAT);
MAKE_PACK_FUNC_IF (float_be, gfloat, GFLOAT_TO_BE, INT2FLOAT);
MAKE_PACK_FUNC_IF (double_le, gdouble, GDOUBLE_TO_LE, INT2DOUBLE);
MAKE_PACK_FUNC_IF (double_be, gdouble, GDOUBLE_TO_BE, INT2DOUBLE);
MAKE_PACK_FUNC_FF (float_hq_le, gfloat, GFLOAT_TO_LE);
MAKE_PACK_FUNC_FF (float_hq_be, gfloat, GFLOAT_TO_BE);
/* For double_hq, packing and unpacking is the same, so we reuse the unpacking
* functions here. */
#define audio_convert_pack_double_hq_le MAKE_UNPACK_FUNC_NAME (double_hq_le)
#define audio_convert_pack_double_hq_be MAKE_UNPACK_FUNC_NAME (double_hq_be)
static AudioConvertUnpack unpack_funcs[] = {
(AudioConvertUnpack) MAKE_UNPACK_FUNC_NAME (u8),
(AudioConvertUnpack) MAKE_UNPACK_FUNC_NAME (s8),
(AudioConvertUnpack) MAKE_UNPACK_FUNC_NAME (u8),
(AudioConvertUnpack) MAKE_UNPACK_FUNC_NAME (s8),
(AudioConvertUnpack) MAKE_UNPACK_FUNC_NAME (u16_le),
(AudioConvertUnpack) MAKE_UNPACK_FUNC_NAME (s16_le),
(AudioConvertUnpack) MAKE_UNPACK_FUNC_NAME (u16_be),
(AudioConvertUnpack) MAKE_UNPACK_FUNC_NAME (s16_be),
(AudioConvertUnpack) MAKE_UNPACK_FUNC_NAME (u24_le),
(AudioConvertUnpack) MAKE_UNPACK_FUNC_NAME (s24_le),
(AudioConvertUnpack) MAKE_UNPACK_FUNC_NAME (u24_be),
(AudioConvertUnpack) MAKE_UNPACK_FUNC_NAME (s24_be),
(AudioConvertUnpack) MAKE_UNPACK_FUNC_NAME (u32_le),
(AudioConvertUnpack) MAKE_UNPACK_FUNC_NAME (s32_le),
(AudioConvertUnpack) MAKE_UNPACK_FUNC_NAME (u32_be),
(AudioConvertUnpack) MAKE_UNPACK_FUNC_NAME (s32_be),
(AudioConvertUnpack) MAKE_UNPACK_FUNC_NAME (float_le),
(AudioConvertUnpack) MAKE_UNPACK_FUNC_NAME (float_be),
(AudioConvertUnpack) MAKE_UNPACK_FUNC_NAME (double_le),
(AudioConvertUnpack) MAKE_UNPACK_FUNC_NAME (double_be),
(AudioConvertUnpack) MAKE_UNPACK_FUNC_NAME (float_hq_le),
(AudioConvertUnpack) MAKE_UNPACK_FUNC_NAME (float_hq_be),
(AudioConvertUnpack) MAKE_UNPACK_FUNC_NAME (double_hq_le),
(AudioConvertUnpack) MAKE_UNPACK_FUNC_NAME (double_hq_be),
};
static AudioConvertPack pack_funcs[] = {
(AudioConvertPack) MAKE_PACK_FUNC_NAME (u8),
(AudioConvertPack) MAKE_PACK_FUNC_NAME (s8),
(AudioConvertPack) MAKE_PACK_FUNC_NAME (u8),
(AudioConvertPack) MAKE_PACK_FUNC_NAME (s8),
(AudioConvertPack) MAKE_PACK_FUNC_NAME (u16_le),
(AudioConvertPack) MAKE_PACK_FUNC_NAME (s16_le),
(AudioConvertPack) MAKE_PACK_FUNC_NAME (u16_be),
(AudioConvertPack) MAKE_PACK_FUNC_NAME (s16_be),
(AudioConvertPack) MAKE_PACK_FUNC_NAME (u24_le),
(AudioConvertPack) MAKE_PACK_FUNC_NAME (s24_le),
(AudioConvertPack) MAKE_PACK_FUNC_NAME (u24_be),
(AudioConvertPack) MAKE_PACK_FUNC_NAME (s24_be),
(AudioConvertPack) MAKE_PACK_FUNC_NAME (u32_le),
(AudioConvertPack) MAKE_PACK_FUNC_NAME (s32_le),
(AudioConvertPack) MAKE_PACK_FUNC_NAME (u32_be),
(AudioConvertPack) MAKE_PACK_FUNC_NAME (s32_be),
(AudioConvertPack) MAKE_PACK_FUNC_NAME (float_le),
(AudioConvertPack) MAKE_PACK_FUNC_NAME (float_be),
(AudioConvertPack) MAKE_PACK_FUNC_NAME (double_le),
(AudioConvertPack) MAKE_PACK_FUNC_NAME (double_be),
(AudioConvertPack) MAKE_PACK_FUNC_NAME (float_hq_le),
(AudioConvertPack) MAKE_PACK_FUNC_NAME (float_hq_be),
(AudioConvertPack) MAKE_PACK_FUNC_NAME (double_hq_le),
(AudioConvertPack) MAKE_PACK_FUNC_NAME (double_hq_be),
};
static gint
audio_convert_get_func_index (AudioConvertFmt * fmt)
{
gint index = 0;
if (fmt->is_int) {
index += (fmt->width / 8 - 1) * 4;
index += fmt->endianness == G_LITTLE_ENDIAN ? 0 : 2;
index += fmt->sign ? 1 : 0;
} else {
/* this is float/double */
index = 16;
index += (fmt->width == 32) ? 0 : 2;
index += (fmt->endianness == G_LITTLE_ENDIAN) ? 0 : 1;
}
return index;
}
static gboolean
check_default (AudioConvertCtx * ctx, AudioConvertFmt * fmt)
{
if (ctx->in.is_int || ctx->out.is_int) {
return (fmt->width == 32 && fmt->depth == 32 &&
fmt->endianness == G_BYTE_ORDER && fmt->sign == TRUE);
} else {
return (fmt->width == 64 && fmt->endianness == G_BYTE_ORDER);
}
}
gboolean
audio_convert_clean_fmt (AudioConvertFmt * fmt)
{
g_return_val_if_fail (fmt != NULL, FALSE);
g_free (fmt->pos);
fmt->pos = NULL;
return TRUE;
}
gboolean
audio_convert_prepare_context (AudioConvertCtx * ctx, AudioConvertFmt * in,
AudioConvertFmt * out)
{
gint idx_in, idx_out;
g_return_val_if_fail (ctx != NULL, FALSE);
g_return_val_if_fail (in != NULL, FALSE);
g_return_val_if_fail (out != NULL, FALSE);
/* first clean the existing context */
audio_convert_clean_context (ctx);
ctx->in = *in;
ctx->out = *out;
gst_channel_mix_setup_matrix (ctx);
idx_in = audio_convert_get_func_index (in);
ctx->unpack = unpack_funcs[idx_in];
idx_out = audio_convert_get_func_index (out);
ctx->pack = pack_funcs[idx_out];
/* if both formats are float/double use double as intermediate format and
* and switch mixing */
if (in->is_int || out->is_int) {
GST_INFO ("use int mixing");
ctx->channel_mix = (AudioConvertMix) gst_channel_mix_mix_int;
} else {
GST_INFO ("use float mixing");
ctx->channel_mix = (AudioConvertMix) gst_channel_mix_mix_float;
/* Bump the pack/unpack function indices by 4 to use double as intermediary
* format (float_hq_*, double_hq_* functions).*/
ctx->unpack = unpack_funcs[idx_in + 4];
ctx->pack = pack_funcs[idx_out + 4];
}
GST_INFO ("unitsizes: %d -> %d", in->unit_size, out->unit_size);
/* check if input is in default format */
ctx->in_default = check_default (ctx, in);
/* check if channel mixer is passthrough */
ctx->mix_passthrough = gst_channel_mix_passthrough (ctx);
/* check if output is in default format */
ctx->out_default = check_default (ctx, out);
GST_INFO ("in default %d, mix passthrough %d, out default %d",
ctx->in_default, ctx->mix_passthrough, ctx->out_default);
ctx->in_scale = (in->is_int) ? (32 - in->depth) : 0;
ctx->out_scale = (out->is_int) ? (32 - out->depth) : 0;
return TRUE;
}
gboolean
audio_convert_clean_context (AudioConvertCtx * ctx)
{
g_return_val_if_fail (ctx != NULL, FALSE);
audio_convert_clean_fmt (&ctx->in);
audio_convert_clean_fmt (&ctx->out);
gst_channel_mix_unset_matrix (ctx);
g_free (ctx->tmpbuf);
ctx->tmpbuf = NULL;
ctx->tmpbufsize = 0;
return TRUE;
}
gboolean
audio_convert_get_sizes (AudioConvertCtx * ctx, gint samples, gint * srcsize,
gint * dstsize)
{
g_return_val_if_fail (ctx != NULL, FALSE);
if (srcsize)
*srcsize = samples * ctx->in.unit_size;
if (dstsize)
*dstsize = samples * ctx->out.unit_size;
return TRUE;
}
gboolean
audio_convert_convert (AudioConvertCtx * ctx, gpointer src,
gpointer dst, gint samples, gboolean src_writable)
{
gint insize, outsize, size;
gpointer outbuf, tmpbuf;
gint intemp = 0, outtemp = 0, biggest;
g_return_val_if_fail (ctx != NULL, FALSE);
g_return_val_if_fail (src != NULL, FALSE);
g_return_val_if_fail (dst != NULL, FALSE);
g_return_val_if_fail (samples >= 0, FALSE);
if (samples == 0)
return TRUE;
insize = ctx->in.unit_size * samples;
outsize = ctx->out.unit_size * samples;
/* find biggest temp buffer size */
size = (ctx->in.is_int || ctx->out.is_int) ?
sizeof (gint32) : sizeof (gdouble);
if (!ctx->in_default)
intemp = insize * size * 8 / ctx->in.width;
if (!ctx->mix_passthrough)
outtemp = outsize * size * 8 / ctx->out.width;
biggest = MAX (intemp, outtemp);
/* see if one of the buffers can be used as temp */
if ((outsize >= biggest) && (ctx->out.unit_size <= size))
tmpbuf = dst;
else if ((insize >= biggest) && src_writable && (ctx->in.unit_size >= size))
tmpbuf = src;
else {
if (biggest > ctx->tmpbufsize) {
ctx->tmpbuf = g_realloc (ctx->tmpbuf, biggest);
ctx->tmpbufsize = biggest;
}
tmpbuf = ctx->tmpbuf;
}
/* start conversion */
if (!ctx->in_default) {
/* check if final conversion */
if (!(ctx->out_default && ctx->mix_passthrough))
outbuf = tmpbuf;
else
outbuf = dst;
/* unpack to default format */
ctx->unpack (src, outbuf, ctx->in_scale, samples * ctx->in.channels);
src = outbuf;
}
if (!ctx->mix_passthrough) {
/* check if final conversion */
if (!ctx->out_default)
outbuf = tmpbuf;
else
outbuf = dst;
/* convert channels */
ctx->channel_mix (ctx, src, outbuf, samples);
src = outbuf;
}
if (!ctx->out_default) {
/* pack default format into dst */
ctx->pack (src, dst, ctx->out_scale, samples * ctx->out.channels);
}
return TRUE;
}
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