198913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project/* Copyright (C) 2002 Jean-Marc Valin 298913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project File: speex_header.c 398913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project Describes the Speex header 498913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project 598913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project Redistribution and use in source and binary forms, with or without 698913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project modification, are permitted provided that the following conditions 798913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project are met: 898913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project 998913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project - Redistributions of source code must retain the above copyright 1098913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project notice, this list of conditions and the following disclaimer. 1198913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project 1298913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project - Redistributions in binary form must reproduce the above copyright 1398913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project notice, this list of conditions and the following disclaimer in the 1498913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project documentation and/or other materials provided with the distribution. 1598913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project 1698913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project - Neither the name of the Xiph.org Foundation nor the names of its 1798913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project contributors may be used to endorse or promote products derived from 1898913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project this software without specific prior written permission. 1998913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project 2098913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 2198913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 2298913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 2398913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR 2498913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 2598913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 2698913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 2798913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 2898913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 2998913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 3098913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 3198913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project 3298913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project*/ 3398913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project 3498913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project#ifdef HAVE_CONFIG_H 3598913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project#include "config.h" 3698913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project#endif 3798913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project 3898913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project#include "arch.h" 3998913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project#include <speex/speex_header.h> 4098913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project#include <speex/speex.h> 4198913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project#include "os_support.h" 4298913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project 4398913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project#ifndef NULL 4498913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project#define NULL 0 4598913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project#endif 4698913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project 4798913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project/** Convert little endian */ 4898913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Projectstatic inline spx_int32_t le_int(spx_int32_t i) 4998913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project{ 5098913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project#if !defined(__LITTLE_ENDIAN__) && ( defined(WORDS_BIGENDIAN) || defined(__BIG_ENDIAN__) ) 5198913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project spx_uint32_t ui, ret; 5298913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project ui = i; 5398913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project ret = ui>>24; 5498913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project ret |= (ui>>8)&0x0000ff00; 5598913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project ret |= (ui<<8)&0x00ff0000; 5698913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project ret |= (ui<<24); 5798913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project return ret; 5898913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project#else 5998913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project return i; 6098913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project#endif 6198913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project} 6298913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project 6398913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project#define ENDIAN_SWITCH(x) {x=le_int(x);} 6498913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project 6598913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project 6698913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project/* 6798913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Projecttypedef struct SpeexHeader { 6898913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project char speex_string[8]; 6998913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project char speex_version[SPEEX_HEADER_VERSION_LENGTH]; 7098913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project int speex_version_id; 7198913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project int header_size; 7298913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project int rate; 7398913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project int mode; 7498913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project int mode_bitstream_version; 7598913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project int nb_channels; 7698913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project int bitrate; 7798913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project int frame_size; 7898913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project int vbr; 7998913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project int frames_per_packet; 8098913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project int extra_headers; 8198913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project int reserved1; 8298913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project int reserved2; 8398913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project} SpeexHeader; 8498913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project*/ 8598913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project 8698913fed6520d8849fb2e246be943e04474aefaThe Android Open Source ProjectEXPORT void speex_init_header(SpeexHeader *header, int rate, int nb_channels, const SpeexMode *m) 8798913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project{ 8898913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project int i; 8998913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project const char *h="Speex "; 9098913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project /* 9198913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project strncpy(header->speex_string, "Speex ", 8); 9298913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project strncpy(header->speex_version, SPEEX_VERSION, SPEEX_HEADER_VERSION_LENGTH-1); 9398913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project header->speex_version[SPEEX_HEADER_VERSION_LENGTH-1]=0; 9498913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project */ 9598913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project for (i=0;i<8;i++) 9698913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project header->speex_string[i]=h[i]; 9798913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project for (i=0;i<SPEEX_HEADER_VERSION_LENGTH-1 && SPEEX_VERSION[i];i++) 9898913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project header->speex_version[i]=SPEEX_VERSION[i]; 9998913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project for (;i<SPEEX_HEADER_VERSION_LENGTH;i++) 10098913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project header->speex_version[i]=0; 10198913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project 10298913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project header->speex_version_id = 1; 10398913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project header->header_size = sizeof(SpeexHeader); 10498913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project 10598913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project header->rate = rate; 10698913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project header->mode = m->modeID; 10798913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project header->mode_bitstream_version = m->bitstream_version; 10898913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project if (m->modeID<0) 10998913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project speex_warning("This mode is meant to be used alone"); 11098913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project header->nb_channels = nb_channels; 11198913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project header->bitrate = -1; 11298913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project speex_mode_query(m, SPEEX_MODE_FRAME_SIZE, &header->frame_size); 11398913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project header->vbr = 0; 11498913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project 11598913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project header->frames_per_packet = 0; 11698913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project header->extra_headers = 0; 11798913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project header->reserved1 = 0; 11898913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project header->reserved2 = 0; 11998913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project} 12098913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project 12198913fed6520d8849fb2e246be943e04474aefaThe Android Open Source ProjectEXPORT char *speex_header_to_packet(SpeexHeader *header, int *size) 12298913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project{ 12398913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project SpeexHeader *le_header; 12498913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project le_header = (SpeexHeader*)speex_alloc(sizeof(SpeexHeader)); 12598913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project 12698913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project SPEEX_COPY(le_header, header, 1); 12798913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project 12898913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project /*Make sure everything is now little-endian*/ 12998913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project ENDIAN_SWITCH(le_header->speex_version_id); 13098913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project ENDIAN_SWITCH(le_header->header_size); 13198913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project ENDIAN_SWITCH(le_header->rate); 13298913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project ENDIAN_SWITCH(le_header->mode); 13398913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project ENDIAN_SWITCH(le_header->mode_bitstream_version); 13498913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project ENDIAN_SWITCH(le_header->nb_channels); 13598913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project ENDIAN_SWITCH(le_header->bitrate); 13698913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project ENDIAN_SWITCH(le_header->frame_size); 13798913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project ENDIAN_SWITCH(le_header->vbr); 13898913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project ENDIAN_SWITCH(le_header->frames_per_packet); 13998913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project ENDIAN_SWITCH(le_header->extra_headers); 14098913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project 14198913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project *size = sizeof(SpeexHeader); 14298913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project return (char *)le_header; 14398913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project} 14498913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project 14598913fed6520d8849fb2e246be943e04474aefaThe Android Open Source ProjectEXPORT SpeexHeader *speex_packet_to_header(char *packet, int size) 14698913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project{ 14798913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project int i; 14898913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project SpeexHeader *le_header; 14998913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project const char *h = "Speex "; 15098913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project for (i=0;i<8;i++) 15198913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project if (packet[i]!=h[i]) 15298913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project { 15398913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project speex_notify("This doesn't look like a Speex file"); 15498913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project return NULL; 15598913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project } 15698913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project 15798913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project /*FIXME: Do we allow larger headers?*/ 15898913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project if (size < (int)sizeof(SpeexHeader)) 15998913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project { 16098913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project speex_notify("Speex header too small"); 16198913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project return NULL; 16298913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project } 16398913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project 16498913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project le_header = (SpeexHeader*)speex_alloc(sizeof(SpeexHeader)); 16598913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project 16698913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project SPEEX_COPY(le_header, (SpeexHeader*)packet, 1); 16798913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project 16898913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project /*Make sure everything is converted correctly from little-endian*/ 16998913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project ENDIAN_SWITCH(le_header->speex_version_id); 17098913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project ENDIAN_SWITCH(le_header->header_size); 17198913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project ENDIAN_SWITCH(le_header->rate); 17298913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project ENDIAN_SWITCH(le_header->mode); 17398913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project ENDIAN_SWITCH(le_header->mode_bitstream_version); 17498913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project ENDIAN_SWITCH(le_header->nb_channels); 17598913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project ENDIAN_SWITCH(le_header->bitrate); 17698913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project ENDIAN_SWITCH(le_header->frame_size); 17798913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project ENDIAN_SWITCH(le_header->vbr); 17898913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project ENDIAN_SWITCH(le_header->frames_per_packet); 17998913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project ENDIAN_SWITCH(le_header->extra_headers); 18098913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project 18198913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project if (le_header->mode >= SPEEX_NB_MODES || le_header->mode < 0) 18298913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project { 18398913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project speex_notify("Invalid mode specified in Speex header"); 18498913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project speex_free (le_header); 18598913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project return NULL; 18698913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project } 18798913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project 18898913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project if (le_header->nb_channels>2) 18998913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project le_header->nb_channels = 2; 19098913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project if (le_header->nb_channels<1) 19198913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project le_header->nb_channels = 1; 19298913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project 19398913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project return le_header; 19498913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project 19598913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project} 19698913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project 19798913fed6520d8849fb2e246be943e04474aefaThe Android Open Source ProjectEXPORT void speex_header_free(void *ptr) 19898913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project{ 19998913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project speex_free(ptr); 20098913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project} 201