Added libspeex to revision control, and updated Makefile to use it.
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Ryan C. Gordon
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commit
7b4a796e44
103 changed files with 27657 additions and 24 deletions
188
code/libspeex/speex_header.c
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188
code/libspeex/speex_header.c
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/* Copyright (C) 2002 Jean-Marc Valin
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File: speex_header.c
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Describes the Speex header
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions
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are met:
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- Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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- Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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- Neither the name of the Xiph.org Foundation nor the names of its
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contributors may be used to endorse or promote products derived from
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this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR
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CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "arch.h"
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#include <speex/speex_header.h>
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#include <speex/speex.h>
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#include "os_support.h"
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#ifndef NULL
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#define NULL 0
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#endif
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/** Convert little endian */
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static inline spx_int32_t le_int(spx_int32_t i)
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{
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#if !defined(__LITTLE_ENDIAN__) && ( defined(WORDS_BIGENDIAN) || defined(__BIG_ENDIAN__) )
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spx_uint32_t ui, ret;
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ui = i;
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ret = ui>>24;
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ret |= (ui>>8)&0x0000ff00;
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ret |= (ui<<8)&0x00ff0000;
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ret |= (ui<<24);
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return ret;
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#else
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return i;
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#endif
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}
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#define ENDIAN_SWITCH(x) {x=le_int(x);}
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/*
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typedef struct SpeexHeader {
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char speex_string[8];
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char speex_version[SPEEX_HEADER_VERSION_LENGTH];
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int speex_version_id;
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int header_size;
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int rate;
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int mode;
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int mode_bitstream_version;
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int nb_channels;
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int bitrate;
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int frame_size;
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int vbr;
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int frames_per_packet;
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int extra_headers;
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int reserved1;
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int reserved2;
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} SpeexHeader;
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*/
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void speex_init_header(SpeexHeader *header, int rate, int nb_channels, const SpeexMode *m)
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{
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int i;
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const char *h="Speex ";
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/*
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strncpy(header->speex_string, "Speex ", 8);
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strncpy(header->speex_version, SPEEX_VERSION, SPEEX_HEADER_VERSION_LENGTH-1);
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header->speex_version[SPEEX_HEADER_VERSION_LENGTH-1]=0;
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*/
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for (i=0;i<8;i++)
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header->speex_string[i]=h[i];
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for (i=0;i<SPEEX_HEADER_VERSION_LENGTH-1 && SPEEX_VERSION[i];i++)
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header->speex_version[i]=SPEEX_VERSION[i];
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for (;i<SPEEX_HEADER_VERSION_LENGTH;i++)
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header->speex_version[i]=0;
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header->speex_version_id = 1;
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header->header_size = sizeof(SpeexHeader);
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header->rate = rate;
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header->mode = m->modeID;
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header->mode_bitstream_version = m->bitstream_version;
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if (m->modeID<0)
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speex_warning("This mode is meant to be used alone");
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header->nb_channels = nb_channels;
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header->bitrate = -1;
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speex_mode_query(m, SPEEX_MODE_FRAME_SIZE, &header->frame_size);
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header->vbr = 0;
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header->frames_per_packet = 0;
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header->extra_headers = 0;
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header->reserved1 = 0;
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header->reserved2 = 0;
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}
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char *speex_header_to_packet(SpeexHeader *header, int *size)
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{
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SpeexHeader *le_header;
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le_header = (SpeexHeader*)speex_alloc(sizeof(SpeexHeader));
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SPEEX_COPY(le_header, header, 1);
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/*Make sure everything is now little-endian*/
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ENDIAN_SWITCH(le_header->speex_version_id);
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ENDIAN_SWITCH(le_header->header_size);
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ENDIAN_SWITCH(le_header->rate);
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ENDIAN_SWITCH(le_header->mode);
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ENDIAN_SWITCH(le_header->mode_bitstream_version);
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ENDIAN_SWITCH(le_header->nb_channels);
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ENDIAN_SWITCH(le_header->bitrate);
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ENDIAN_SWITCH(le_header->frame_size);
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ENDIAN_SWITCH(le_header->vbr);
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ENDIAN_SWITCH(le_header->frames_per_packet);
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ENDIAN_SWITCH(le_header->extra_headers);
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*size = sizeof(SpeexHeader);
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return (char *)le_header;
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}
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SpeexHeader *speex_packet_to_header(char *packet, int size)
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{
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int i;
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SpeexHeader *le_header;
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const char *h = "Speex ";
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for (i=0;i<8;i++)
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if (packet[i]!=h[i])
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{
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speex_notify("This doesn't look like a Speex file");
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return NULL;
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}
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/*FIXME: Do we allow larger headers?*/
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if (size < (int)sizeof(SpeexHeader))
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{
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speex_notify("Speex header too small");
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return NULL;
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}
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le_header = (SpeexHeader*)speex_alloc(sizeof(SpeexHeader));
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SPEEX_COPY(le_header, (SpeexHeader*)packet, 1);
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/*Make sure everything is converted correctly from little-endian*/
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ENDIAN_SWITCH(le_header->speex_version_id);
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ENDIAN_SWITCH(le_header->header_size);
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ENDIAN_SWITCH(le_header->rate);
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ENDIAN_SWITCH(le_header->mode);
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ENDIAN_SWITCH(le_header->mode_bitstream_version);
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ENDIAN_SWITCH(le_header->nb_channels);
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ENDIAN_SWITCH(le_header->bitrate);
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ENDIAN_SWITCH(le_header->frame_size);
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ENDIAN_SWITCH(le_header->vbr);
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ENDIAN_SWITCH(le_header->frames_per_packet);
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ENDIAN_SWITCH(le_header->extra_headers);
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return le_header;
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}
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void speex_header_free(void *ptr)
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{
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speex_free(ptr);
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}
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