search for: nbbit

another optimization you can do for packing bits together... the original one is : ------------------------------------------------------------------------------------------------------------- void speex_bits_pack(SpeexBits *bits, int data, int nbBits) { int i; unsigned int d=data; if (bits->bytePtr+((nbBits+bits->bitPtr)>>3) >= bits->buf_size) { //remain unchanged.... } while(nbBits) { int bit; bit = (d>>(nbBits-1))&1; bits->bytes[bits->bytePtr] |= bit<<(7-...

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...sage of it. nbBytes = speex_bits_write(&bits, cbits, MAX_FRAME_BYTES); I examine the content of this function and which value should I set to MAX_FRAME_BYTE. In speexenc project, it is 2000 and in manual it is 200. For example, I set it to 200 but the length of bits->chars is 250 (bits->nbBits is 2000), is this right? If so, max_nchars gets 200 value because following statement in speex_bits_write and the condition of if statement does not achieve. (in my environment, BYTES_PER_CHAR=1, speex_nb_mode, 8 kHz, 15 kbps) int max_nchars = max_nbytes/BYTES_PER_CHAR; if (max_nchars > ((bit...

...a some kind tutorial and patches), but it seems to be a little bug in bits.c. The code looks like this void speex_bits_read_from(SpeexBits *bits, char *chars, int len) { ////////////////// bla-bla-bla /////////////////// for (i=0;i<len;i++) bits->chars[i]=chars[i]; bits->nbBits=len<<3; //!!!!!!!!!!!!!!!!!!! bits->charPtr=0; bits->bitPtr=0; bits->overflow=0; } What is bits->nbBits=len<<3 ? Shouldn't it be bits->nbBits=len<<3 LOG2_BITS_PER_CHAR ? And another question. What is the difference between functions speex...

...me. For this reason, I call speex_bits_read_whole_bytes() and fill it to MAXIMUM in a loop while calling speex_decode() until there are no more bytes to read. SYMPTOM: You can only go up to MAX_BYTES_PER_FRAME-1 due an incorrect calculation in the function. LINES THAT ARE THE PROBLEM: ((bits->nbBits>>3)+len+1 should read ((bits->nbBits+7)>>3)+len otherwise if nbBits is 0 or a full byte, the buffer will never get to MAX_BYTES_PER_FRAME. __________________________________ Do you Yahoo!? Yahoo! SiteBuilder - Free, easy-to-use web site design software http://sitebuilder.yahoo.com...

i'm optimizing some features....for exemple why not doing this : ------------------------------------------------------------------------------- void speex_bits_advance(SpeexBits *bits, int n) { if (((bits->bytePtr<<3)+bits->bitPtr+n>bits->nbBits) || bits->overflow){ bits->overflow=1; return; } bits->bytePtr += (bits->bitPtr+nbBits) >> 3; //divide by 8 bits->bitPtr = (bits->bitPtr+nbBits) & 7; // modulo by 8 } -----------------------------------------------------------------------------...

...@@ -153,7 +153,7 @@ bits->charPtr=0; } -void speex_bits_read_whole_bytes(SpeexBits *bits, char *chars, int nbytes) +EXPORT void speex_bits_read_whole_bytes(SpeexBits *bits, char *chars, int nbytes) { int i,pos; int nchars = nbytes/BYTES_PER_CHAR; @@ -185,7 +185,7 @@ bits->nbBits+=nchars<<LOG2_BITS_PER_CHAR; } -int speex_bits_write(SpeexBits *bits, char *chars, int max_nbytes) +EXPORT int speex_bits_write(SpeexBits *bits, char *chars, int max_nbytes) { int i; int max_nchars = max_nbytes/BYTES_PER_CHAR; @@ -208,7 +208,7 @@ return max_nchars*BYTES_PER_C...

...@@ -153,7 +153,7 @@ bits->charPtr=0; } -void speex_bits_read_whole_bytes(SpeexBits *bits, char *chars, int nbytes) +EXPORT void speex_bits_read_whole_bytes(SpeexBits *bits, char *chars, int nbytes) { int i,pos; int nchars = nbytes/BYTES_PER_CHAR; @@ -185,7 +185,7 @@ bits->nbBits+=nchars<<LOG2_BITS_PER_CHAR; } -int speex_bits_write(SpeexBits *bits, char *chars, int max_nbytes) +EXPORT int speex_bits_write(SpeexBits *bits, char *chars, int max_nbytes) { int i; int max_nchars = max_nbytes/BYTES_PER_CHAR; @@ -208,7 +208,7 @@ return max_nchars*BYTES_PER_C...

After searching the mailing list archive (I forgot to do that before posting, sorry!) I found the solutions: 1) The documentation has a mistake: The bit terminator is NOT set automatically! (I'm using the latest speex version!) It has to be set manually using speex_bits_insert_terminator(&bits); 2) speex_decoder_int() has to be called as long, as it returns -1. After that, all frames

...hole_bytes() and fill > it to MAXIMUM in a loop while calling speex_decode() > until there are no more bytes to read. > > SYMPTOM: > You can only go up to MAX_BYTES_PER_FRAME-1 due an > incorrect calculation in the function. > > LINES THAT ARE THE PROBLEM: > ((bits->nbBits>>3)+len+1 > should read > ((bits->nbBits+7)>>3)+len > otherwise if nbBits is 0 or a full byte, the buffer > will never get to MAX_BYTES_PER_FRAME. > > __________________________________ > Do you Yahoo!? > Yahoo! SiteBuilder - Free, easy-to-use web site desig...

...eex_bits_write(&bits, cbits, MAX_FRAME_BYTES); > > I examine the content of this function and which value should I set to > MAX_FRAME_BYTE. In speexenc project, it is 2000 and in manual it is 200. > For example, I set it to 200 but the length of bits->chars is 250 > (bits->nbBits is 2000), is this right? If so, max_nchars gets 200 value > because following statement in speex_bits_write and the condition of if > statement does not achieve. (in my environment, BYTES_PER_CHAR=1, > speex_nb_mode, 8 kHz, 15 kbps) > > int max_nchars = max_nbytes/BYTES_PER_CHAR; &...

...tiple frame inside e.g 6 speex frames. I packed those frames manually by concating them into a buffer(memcpy at certain array index). Then at the other side, i decode them in a while loop using speex_decode_int(), and hoping that this function will decode one frame at a time. But when i inspected nbBits, it seemed all of 6 frames decoded at once. I guess the decoder didn`t find the terminator bits. And no sound at all. Did I do anything wrong? Speex setting: narrow band, 8000 khz,20ms,8000 bps. 1 frame encoded size = 20 bytes 1 frame decoded size = 160 bytes, but i got 960 bytes(160 x 6 frames)...

It would be nice to have the following function added to the speex bits... void speex_bits_read_from_buffer( SpeexBits * const bits, void * const buff, const int buf_size) { bits->bytes = (char*)buff; bits->buf_size = buf_size; bits->nbBits = buf_size << 3; bits->bytePtr = 0; bits->bitPtr = 0; bits->owner = 0; bits->overflow = 0; } ... so a bitstream can be assigned to a SpeexBits structure for processing by a decoder rather than unnecessarily copying the data. As an aside, I'm working...

...void *speex_encoder_init_new(int modeID) { const SpeexMode *mode; mode = speex_lib_get_mode(modeID); return mode->enc_init(mode); } Maybe following codes that I have been using in a class can help you. /* structs */ public struct SpeexBits { char *chars; /* "raw" data */ int nbBits; /* Total number of bits stored in the stream*/ int charPtr; /* Position of the byte "cursor" */ int bitPtr; /* Position of the bit "cursor" within the current char */ int owner; /* Does the struct "own" the "raw" buffer (member "chars&quot...

...eex_bits_init_buffer_ex(SpeexBits *bits, void *buff, int buf_size){ if (buff == NULL || buf_size == 0) return -1; memset(bits, 0, sizeof(SpeexBits)); bits->bytes = (char*)buff; bits->buf_size = buf_size; bits->nbBits=buf_size << 3; return 0; } int CSpeexDecoderThread::DecodePlay(void* state, SpeexStereoState stereo, char* pcData, DWORD dwLength, int nchannels, int frame_size, int ynccount){ ... if (synccount > 0){ callback.callback_id = 0;...

...g function added to the speex > bits... > > void speex_bits_read_from_buffer( > SpeexBits * const bits, > void * const buff, > const int buf_size) > { > bits->bytes = (char*)buff; > bits->buf_size = buf_size; > bits->nbBits = buf_size << 3; > bits->bytePtr = 0; > bits->bitPtr = 0; > bits->owner = 0; > bits->overflow = 0; > } > > ... so a bitstream can be assigned to a SpeexBits structure for > processing by a decoder rather than unnecessarily copying...

Hi, I have read the message below, http://lists.xiph.org/pipermail/speex-dev/2006-October/004924.html and try to use P/Invoke to use speex in C#. This is a part of my code. [StructLayout(LayoutKind.Sequential)] public struct SpeexBits { IntPtr chars; // "raw" data int nbBits; // Total number of bits stored in the stream int charPtr; // Position of the byte "cursor" int bitPtr; // Position of the bit "cursor" within the current char int owner; // Does the struct "own" the "raw" buffer (member "chars") in...

...tream for(i = 0; i < SPEEX_FRAME_SIZE; i++) { *in_left++ = *in++; // channel 1 in++; // channel 2 } in_left = in_buffer_calc; speex_bits_reset(&g_Bits); // Encode the frame speex_encode_int(g_pvEnc, (spx_int16_t *)in_left, &g_Bits); nbBits = speex_bits_write(&g_Bits, cbits, 200); speex_bits_rewind(&g_Bits); SpeexEchoState *st= speex_echo_state_init(SPEEX_FRAME_SIZE,filter_length); speex_echo_cancel(st,(spx_int16_t *)in_left,(spx_int16_t *)out_left,(spx_int16_t *)out2,NULL); speex_echo_state_destroy(st);...

...int > buf_size){ > > if (buff == NULL || buf_size == 0) > return -1; > > memset(bits, 0, sizeof(SpeexBits)); > > bits->bytes = (char*)buff; > bits->buf_size = buf_size; > bits->nbBits=buf_size << 3; > > return 0; > } > > int CSpeexDecoderThread::DecodePlay(void* state, SpeexStereoState > stereo, > char* pcData, DWORD dwLength, int nchannels, int frame_size, > int > synccount){ > > ... > > if...

...lic const int Max_Frame_Size = 2000; public const int Speex_Get_Frame_Size = 3; public const int Speex_Set_Quality = 4; public const int Speex_nb_Mode = 3; //create the structure that will hold the speexbits public struct SpeexBits { public char *chars; /* "raw" data */ public int nbBits; /* Total number of bits stored in thestream*/ public int charPtr; /* Position of the byte "cursor" */ public int bitPtr; /* Position of the bit "cursor" within thecurrent char */ public int owner; /* Does the struct "own" the "raw" buffer(member "ch...