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提交 34420814 编写于 作者: S Sean Barrett
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1.0 release (still no seeking, sorry)

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stb_vorbis.c
浏览文件 @ 34420814
// Ogg Vorbis I audio decoder -- version 0.99996
// Ogg Vorbis audio decoder -- public domain -- version 1.0
// http://nothings.org/stb_vorbis/
//
// Written in April 2007 by Sean Barrett, sponsored by RAD Game Tools.
// Written by Sean Barrett in 2007, last updated in 2014
// Sponsored by RAD Game Tools.
//
// Placed in the public domain April 2007 by the author: no copyright is
// claimed, and you may use it for any purpose you like.
// Placed in the public domain April 2007 by the author: no copyright
// is claimed, and you may use it for any purpose you like.
//
// No warranty for any purpose is expressed or implied by the author (nor
// by RAD Game Tools). Report bugs and send enhancements to the author.
//
// Get the latest version and other information at:
// http://nothings.org/stb_vorbis/
// Todo:
//
// - seeking (note you can seek yourself using the pushdata API)
//
// Limitations:
//
// - floor 0 not supported (used in old ogg vorbis files)
// - seeking not supported except manually via PUSHDATA api
// - floor 0 not supported (used in old ogg vorbis files pre-2004)
// - lossless sample-truncation at beginning ignored
// - cannot concatenate multiple vorbis streams
// - sample positions are 32-bit, limiting seekable 192Khz
// files to around 6 hours (Ogg supports 64-bit)
//
// All of these limitations may be removed in future versions.
//
// Bugfix/warning contributors:
// Terje Mathisen Niklas Frykholm
// Casey Muratori John Bolton
// Laurent Gomila Marc LeBlanc
// Bernhard Wodo Evan Balster
// Tom Beaumont Ingo Leitgeb
// (If you reported a bug but do not appear in this list, it is because
// someone else reported the bug before you. There were too many of you to
// list them all because I was lax about updating for a long time, sorry.)
//
// Partial history:
// 1.0 - 2014/05/26 - fix memory leaks; fix warnings; fix bugs in >2-channel;
// (API change) report sample rate for decode-full-file funcs
// 0.99996 - - bracket #include <malloc.h> for macintosh compilation
// 0.99995 - - avoid alias-optimization issue in float-to-int conversion
//
// See end of file for full version history.
//////////////////////////////////////////////////////////////////////////////
......@@ -153,6 +164,7 @@ extern int stb_vorbis_decode_frame_pushdata(
// decode a frame of audio sample data if possible from the passed-in data block
//
// return value: number of bytes we used from datablock
//
// possible cases:
// 0 bytes used, 0 samples output (need more data)
// N bytes used, 0 samples output (resynching the stream, keep going)
......@@ -197,9 +209,11 @@ extern void stb_vorbis_flush_pushdata(stb_vorbis *f);
// just want to go ahead and use pushdata.)
#if !defined(STB_VORBIS_NO_STDIO) && !defined(STB_VORBIS_NO_INTEGER_CONVERSION)
extern int stb_vorbis_decode_filename(char *filename, int *channels, short **output);
extern int stb_vorbis_decode_filename(char *filename, int *channels, int *sample_rate, short **output);
#endif
#if !defined(STB_VORBIS_NO_INTEGER_CONVERSION)
extern int stb_vorbis_decode_memory(unsigned char *mem, int len, int *channels, int *sample_rate, short **output);
#endif
extern int stb_vorbis_decode_memory(unsigned char *mem, int len, int *channels, short **output);
// decode an entire file and output the data interleaved into a malloc()ed
// buffer stored in *output. The return value is the number of samples
// decoded, or -1 if the file could not be opened or was not an ogg vorbis file.
......@@ -812,7 +826,7 @@ extern int my_prof(int slot);
//#define stb_prof my_prof
#ifndef stb_prof
#define stb_prof(x) 0
#define stb_prof(x) ((void) 0)
#endif
#if defined(STB_VORBIS_NO_PUSHDATA_API)
......@@ -896,7 +910,7 @@ static void *setup_temp_malloc(vorb *f, int sz)
return malloc(sz);
}
static void setup_temp_free(vorb *f, void *p, size_t sz)
static void setup_temp_free(vorb *f, void *p, int sz)
{
if (f->alloc.alloc_buffer) {
f->temp_offset += (sz+3)&~3;
......@@ -1351,7 +1365,7 @@ static int capture_pattern(vorb *f)
static int start_page_no_capturepattern(vorb *f)
{
uint32 loc0,loc1,n,i;
uint32 loc0,loc1,n;
// stream structure version
if (0 != get8(f)) return error(f, VORBIS_invalid_stream_structure_version);
// header flag
......@@ -1375,6 +1389,7 @@ static int start_page_no_capturepattern(vorb *f)
// assume we _don't_ know any the sample position of any segments
f->end_seg_with_known_loc = -2;
if (loc0 != ~0 || loc1 != ~0) {
int i;
// determine which packet is the last one that will complete
for (i=f->segment_count-1; i >= 0; --i)
if (f->segments[i] < 255)
......@@ -1471,9 +1486,10 @@ static int next_segment(vorb *f)
static int get8_packet_raw(vorb *f)
{
if (!f->bytes_in_seg)
if (!f->bytes_in_seg) { // CLANG!
if (f->last_seg) return EOP;
else if (!next_segment(f)) return EOP;
}
assert(f->bytes_in_seg > 0);
--f->bytes_in_seg;
++f->packet_bytes;
......@@ -1806,7 +1822,8 @@ static int codebook_decode_deinterleave_repeat(vorb *f, Codebook *c, float **out
for (i=0; i < effective; ++i) {
int off = (z / div) % c->lookup_values;
float val = CODEBOOK_ELEMENT_FAST(c,off) + last;
outputs[c_inter][p_inter] += val;
if (outputs[c_inter])
outputs[c_inter][p_inter] += val;
if (++c_inter == ch) { c_inter = 0; ++p_inter; }
if (c->sequence_p) last = val;
div *= c->lookup_values;
......@@ -1818,14 +1835,16 @@ static int codebook_decode_deinterleave_repeat(vorb *f, Codebook *c, float **out
if (c->sequence_p) {
for (i=0; i < effective; ++i) {
float val = CODEBOOK_ELEMENT_FAST(c,z+i) + last;
outputs[c_inter][p_inter] += val;
if (outputs[c_inter])
outputs[c_inter][p_inter] += val;
if (++c_inter == ch) { c_inter = 0; ++p_inter; }
last = val;
}
} else {
for (i=0; i < effective; ++i) {
float val = CODEBOOK_ELEMENT_FAST(c,z+i) + last;
outputs[c_inter][p_inter] += val;
if (outputs[c_inter])
outputs[c_inter][p_inter] += val;
if (++c_inter == ch) { c_inter = 0; ++p_inter; }
}
}
......@@ -1873,7 +1892,8 @@ static int codebook_decode_deinterleave_repeat_2(vorb *f, Codebook *c, float **o
// haven't optimized this case because I don't have any examples
for (i=0; i < effective; ++i) {
float val = CODEBOOK_ELEMENT_FAST(c,z+i) + last;
outputs[c_inter][p_inter] += val;
if (outputs[c_inter])
outputs[c_inter][p_inter] += val;
if (++c_inter == 2) { c_inter = 0; ++p_inter; }
last = val;
}
......@@ -1881,7 +1901,8 @@ static int codebook_decode_deinterleave_repeat_2(vorb *f, Codebook *c, float **o
i=0;
if (c_inter == 1) {
float val = CODEBOOK_ELEMENT_FAST(c,z+i) + last;
outputs[c_inter][p_inter] += val;
if (outputs[c_inter])
outputs[c_inter][p_inter] += val;
c_inter = 0; ++p_inter;
++i;
}
......@@ -1889,15 +1910,20 @@ static int codebook_decode_deinterleave_repeat_2(vorb *f, Codebook *c, float **o
float *z0 = outputs[0];
float *z1 = outputs[1];
for (; i+1 < effective;) {
z0[p_inter] += CODEBOOK_ELEMENT_FAST(c,z+i) + last;
z1[p_inter] += CODEBOOK_ELEMENT_FAST(c,z+i+1) + last;
float v0 = CODEBOOK_ELEMENT_FAST(c,z+i) + last;
float v1 = CODEBOOK_ELEMENT_FAST(c,z+i+1) + last;
if (z0)
z0[p_inter] += v0;
if (z1)
z1[p_inter] += v1;
++p_inter;
i += 2;
}
}
if (i < effective) {
float val = CODEBOOK_ELEMENT_FAST(c,z+i) + last;
outputs[c_inter][p_inter] += val;
if (outputs[c_inter])
outputs[c_inter][p_inter] += val;
if (++c_inter == 2) { c_inter = 0; ++p_inter; }
}
}
......@@ -2344,7 +2370,7 @@ void inverse_mdct_slow(float *buffer, int n, vorb *f, int blocktype)
}
free(x);
}
#else
#elif 0
// transform to use a slow dct-iv; this is STILL basically trivial,
// but only requires half as many ops
void dct_iv_slow(float *buffer, int n)
......@@ -2360,10 +2386,8 @@ void dct_iv_slow(float *buffer, int n)
float acc = 0;
for (j=0; j < n; ++j)
acc += x[j] * mcos[((2 * i + 1)*(2*j+1)) & nmask];
//acc += x[j] * cos(M_PI / n * (i + 0.5) * (j + 0.5));
buffer[i] = acc;
}
free(x);
}
void inverse_mdct_slow(float *buffer, int n, vorb *f, int blocktype)
......@@ -3562,7 +3586,7 @@ static int is_whole_packet_present(stb_vorbis *f, int end_page)
}
if (end_page)
if (s < n-1) return error(f, VORBIS_invalid_stream);
if (s == f->segment_count)
if (s == n)
s = -1; // set 'crosses page' flag
if (p > f->stream_end) return error(f, VORBIS_need_more_data);
first = FALSE;
......@@ -3713,7 +3737,6 @@ static int start_decoder(vorb *f)
// compute the size of the sorted tables
if (c->sparse) {
sorted_count = total;
//assert(total != 0);
} else {
sorted_count = 0;
#ifndef STB_VORBIS_NO_HUFFMAN_BINARY_SEARCH
......@@ -3830,10 +3853,12 @@ static int start_decoder(vorb *f)
#else
for (j=0; j < (int) c->lookup_values; ++j)
c->multiplicands[j] = mults[j] * c->delta_value + c->minimum_value;
setup_temp_free(f, mults,sizeof(mults[0])*c->lookup_values);
#endif
setup_temp_free(f, mults,sizeof(mults[0])*c->lookup_values);
}
#ifndef STB_VORBIS_DIVIDES_IN_CODEBOOK
skip:;
#endif
#ifdef STB_VORBIS_CODEBOOK_FLOATS
if (c->lookup_type == 2 && c->sequence_p) {
......@@ -3980,7 +4005,7 @@ static int start_decoder(vorb *f)
if (mapping_type != 0) return error(f, VORBIS_invalid_setup);
m->chan = (MappingChannel *) setup_malloc(f, f->channels * sizeof(*m->chan));
if (get_bits(f,1))
m->submaps = get_bits(f,4);
m->submaps = get_bits(f,4)+1;
else
m->submaps = 1;
if (m->submaps > max_submaps)
......@@ -3988,8 +4013,8 @@ static int start_decoder(vorb *f)
if (get_bits(f,1)) {
m->coupling_steps = get_bits(f,8)+1;
for (k=0; k < m->coupling_steps; ++k) {
m->chan[k].magnitude = get_bits(f, ilog(f->channels)-1);
m->chan[k].angle = get_bits(f, ilog(f->channels)-1);
m->chan[k].magnitude = get_bits(f, ilog(f->channels-1));
m->chan[k].angle = get_bits(f, ilog(f->channels-1));
if (m->chan[k].magnitude >= f->channels) return error(f, VORBIS_invalid_setup);
if (m->chan[k].angle >= f->channels) return error(f, VORBIS_invalid_setup);
if (m->chan[k].magnitude == m->chan[k].angle) return error(f, VORBIS_invalid_setup);
......@@ -4138,6 +4163,7 @@ static void vorbis_deinit(stb_vorbis *p)
setup_free(p, p->B[i]);
setup_free(p, p->C[i]);
setup_free(p, p->window[i]);
setup_free(p, p->bit_reverse[i]);
}
#ifndef STB_VORBIS_NO_STDIO
if (p->close_on_free) fclose(p->f);
......@@ -4477,11 +4503,12 @@ static uint32 vorbis_find_page(stb_vorbis *f, uint32 *end, uint32 *last)
// invalid-but-useful files?
if (end)
*end = stb_vorbis_get_file_offset(f);
if (last)
if (last) {
if (header[5] & 0x04)
*last = 1;
else
*last = 0;
}
set_file_offset(f, retry_loc-1);
return 1;
}
......@@ -4855,7 +4882,7 @@ unsigned int stb_vorbis_stream_length_in_samples(stb_vorbis *f)
if (IS_PUSH_MODE(f)) return error(f, VORBIS_invalid_api_mixing);
if (!f->total_samples) {
int last;
unsigned int last;
uint32 lo,hi;
char header[6];
......@@ -4873,7 +4900,7 @@ unsigned int stb_vorbis_stream_length_in_samples(stb_vorbis *f)
// previous_safe is now our candidate 'earliest known place that seeking
// to will lead to the final page'
if (!vorbis_find_page(f, &end, (int unsigned *)&last)) {
if (!vorbis_find_page(f, &end, &last)) {
// if we can't find a page, we're hosed!
f->error = VORBIS_cant_find_last_page;
f->total_samples = 0xffffffff;
......@@ -4888,7 +4915,7 @@ unsigned int stb_vorbis_stream_length_in_samples(stb_vorbis *f)
// explicitly checking the length of the section
while (!last) {
set_file_offset(f, end);
if (!vorbis_find_page(f, &end, (int unsigned *)&last)) {
if (!vorbis_find_page(f, &end, &last)) {
// the last page we found didn't have the 'last page' flag
// set. whoops!
break;
......@@ -5097,7 +5124,6 @@ static void compute_samples(int mask, short *output, int num_c, float **data, in
}
}
static int channel_selector[3][2] = { {0}, {PLAYBACK_MONO}, {PLAYBACK_LEFT, PLAYBACK_RIGHT} };
static void compute_stereo_samples(short *output, int num_c, float **data, int d_offset, int len)
{
#define BUFFER_SIZE 32
......@@ -5147,7 +5173,7 @@ static void convert_samples_short(int buf_c, short **buffer, int b_offset, int d
} else {
int limit = buf_c < data_c ? buf_c : data_c;
for (i=0; i < limit; ++i)
copy_samples(buffer[i]+b_offset, data[i], samples);
copy_samples(buffer[i]+b_offset, data[i]+d_offset, samples);
for ( ; i < buf_c; ++i)
memset(buffer[i]+b_offset, 0, sizeof(short) * samples);
}
......@@ -5243,7 +5269,7 @@ int stb_vorbis_get_samples_short(stb_vorbis *f, int channels, short **buffer, in
}
#ifndef STB_VORBIS_NO_STDIO
int stb_vorbis_decode_filename(char *filename, int *channels, short **output)
int stb_vorbis_decode_filename(char *filename, int *channels, int *sample_rate, short **output)
{
int data_len, offset, total, limit, error;
short *data;
......@@ -5251,6 +5277,8 @@ int stb_vorbis_decode_filename(char *filename, int *channels, short **output)
if (v == NULL) return -1;
limit = v->channels * 4096;
*channels = v->channels;
if (sample_rate)
*sample_rate = v->sample_rate;
offset = data_len = 0;
total = limit;
data = (short *) malloc(total * sizeof(*data));
......@@ -5276,11 +5304,12 @@ int stb_vorbis_decode_filename(char *filename, int *channels, short **output)
}
}
*output = data;
stb_vorbis_close(v);
return data_len;
}
#endif // NO_STDIO
int stb_vorbis_decode_memory(uint8 *mem, int len, int *channels, short **output)
int stb_vorbis_decode_memory(uint8 *mem, int len, int *channels, int *sample_rate, short **output)
{
int data_len, offset, total, limit, error;
short *data;
......@@ -5288,6 +5317,8 @@ int stb_vorbis_decode_memory(uint8 *mem, int len, int *channels, short **output)
if (v == NULL) return -1;
limit = v->channels * 4096;
*channels = v->channels;
if (sample_rate)
*sample_rate = v->sample_rate;
offset = data_len = 0;
total = limit;
data = (short *) malloc(total * sizeof(*data));
......@@ -5313,9 +5344,10 @@ int stb_vorbis_decode_memory(uint8 *mem, int len, int *channels, short **output)
}
}
*output = data;
stb_vorbis_close(v);
return data_len;
}
#endif
#endif // STB_VORBIS_NO_INTEGER_CONVERSION
int stb_vorbis_get_samples_float_interleaved(stb_vorbis *f, int channels, float *buffer, int num_floats)
{
......@@ -5367,4 +5399,44 @@ int stb_vorbis_get_samples_float(stb_vorbis *f, int channels, float **buffer, in
}
#endif // STB_VORBIS_NO_PULLDATA_API
/* Version history
1.0 - 2014/05/26 - fix memory leaks; fix warnings; fix bugs in multichannel
(API change) report sample rate for decode-full-file funcs
0.99996 - bracket #include <malloc.h> for macintosh compilation by Laurent Gomila
0.99995 - use union instead of pointer-cast for fast-float-to-int to avoid alias-optimization problem
0.99994 - change fast-float-to-int to work in single-precision FPU mode, remove endian-dependence
0.99993 - remove assert that fired on legal files with empty tables
0.99992 - rewind-to-start
0.99991 - bugfix to stb_vorbis_get_samples_short by Bernhard Wodo
0.9999 - (should have been 0.99990) fix no-CRT support, compiling as C++
0.9998 - add a full-decode function with a memory source
0.9997 - fix a bug in the read-from-FILE case in 0.9996 addition
0.9996 - query length of vorbis stream in samples/seconds
0.9995 - bugfix to another optimization that only happened in certain files
0.9994 - bugfix to one of the optimizations that caused significant (but inaudible?) errors
0.9993 - performance improvements; runs in 99% to 104% of time of reference implementation
0.9992 - performance improvement of IMDCT; now performs close to reference implementation
0.9991 - performance improvement of IMDCT
0.999 - (should have been 0.9990) performance improvement of IMDCT
0.998 - no-CRT support from Casey Muratori
0.997 - bugfixes for bugs found by Terje Mathisen
0.996 - bugfix: fast-huffman decode initialized incorrectly for sparse codebooks; fixing gives 10% speedup - found by Terje Mathisen
0.995 - bugfix: fix to 'effective' overrun detection - found by Terje Mathisen
0.994 - bugfix: garbage decode on final VQ symbol of a non-multiple - found by Terje Mathisen
0.993 - bugfix: pushdata API required 1 extra byte for empty page (failed to consume final page if empty) - found by Terje Mathisen
0.992 - fixes for MinGW warning
0.991 - turn fast-float-conversion on by default
0.990 - fix push-mode seek recovery if you seek into the headers
0.98b - fix to bad release of 0.98
0.98 - fix push-mode seek recovery; robustify float-to-int and support non-fast mode
0.97 - builds under c++ (typecasting, don't use 'class' keyword)
0.96 - somehow MY 0.95 was right, but the web one was wrong, so here's my 0.95 rereleased as 0.96, fixes a typo in the clamping code
0.95 - clamping code for 16-bit functions
0.94 - not publically released
0.93 - fixed all-zero-floor case (was decoding garbage)
0.92 - fixed a memory leak
0.91 - conditional compiles to omit parts of the API and the infrastructure to support them: STB_VORBIS_NO_PULLDATA_API, STB_VORBIS_NO_PUSHDATA_API, STB_VORBIS_NO_STDIO, STB_VORBIS_NO_INTEGER_CONVERSION
0.90 - first public release
*/
#endif // STB_VORBIS_HEADER_ONLY
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