+++ /dev/null
-/*
- frame: Heap of routines dealing with the core mpg123 data structure.
-
- copyright 2008-2014 by the mpg123 project - free software under the terms of the LGPL 2.1
- see COPYING and AUTHORS files in distribution or http://mpg123.org
- initially written by Thomas Orgis
-*/
-
-#include "mpg123lib_intern.h"
-#include "getcpuflags.h"
-#include "debug.h"
-
-static void frame_fixed_reset(mpg123_handle *fr);
-
-/* that's doubled in decode_ntom.c */
-#define NTOM_MUL (32768)
-
-#define aligned_pointer(p, type, alignment) align_the_pointer(p, alignment)
-static void *align_the_pointer(void *base, unsigned int alignment)
-{
- /*
- Work in unsigned integer realm, explicitly.
- Tricking the compiler into integer operations like % by invoking base-NULL is dangerous: It results into ptrdiff_t, which gets negative on big addresses. Big screw up, that.
- I try to do it "properly" here: Casting only to uintptr_t and no artihmethic with void*.
- */
- uintptr_t baseval = (uintptr_t)(char*)base;
- uintptr_t aoff = baseval % alignment;
-
- debug3("align_the_pointer: pointer %p is off by %u from %u",
- base, (unsigned int)aoff, alignment);
-
- if(aoff) return (char*)base+alignment-aoff;
- else return base;
-}
-
-static void frame_default_pars(mpg123_pars *mp)
-{
- mp->outscale = 1.0;
- mp->flags = 0;
-#ifdef GAPLESS
- mp->flags |= MPG123_GAPLESS;
-#endif
- mp->flags |= MPG123_AUTO_RESAMPLE;
-#ifndef NO_NTOM
- mp->force_rate = 0;
-#endif
- mp->down_sample = 0;
- mp->rva = 0;
- mp->halfspeed = 0;
- mp->doublespeed = 0;
- mp->verbose = 0;
-#ifndef NO_ICY
- mp->icy_interval = 0;
-#endif
- mp->timeout = 0;
- mp->resync_limit = 1024;
-#ifdef FRAME_INDEX
- mp->index_size = INDEX_SIZE;
-#endif
- mp->preframes = 4; /* That's good for layer 3 ISO compliance bitstream. */
- mpg123_fmt_all(mp);
- /* Default of keeping some 4K buffers at hand, should cover the "usual" use case (using 16K pipe buffers as role model). */
-#ifndef NO_FEEDER
- mp->feedpool = 5;
- mp->feedbuffer = 4096;
-#endif
-}
-
-void frame_init(mpg123_handle *fr)
-{
- frame_init_par(fr, NULL);
-}
-
-void frame_init_par(mpg123_handle *fr, mpg123_pars *mp)
-{
- fr->own_buffer = TRUE;
- fr->buffer.data = NULL;
- fr->buffer.rdata = NULL;
- fr->buffer.fill = 0;
- fr->buffer.size = 0;
- fr->rawbuffs = NULL;
- fr->rawbuffss = 0;
- fr->rawdecwin = NULL;
- fr->rawdecwins = 0;
-#ifndef NO_8BIT
- fr->conv16to8_buf = NULL;
-#endif
-#ifdef OPT_DITHER
- fr->dithernoise = NULL;
-#endif
- fr->layerscratch = NULL;
- fr->xing_toc = NULL;
- fr->cpu_opts.type = defdec();
- fr->cpu_opts.class = decclass(fr->cpu_opts.type);
-#ifndef NO_NTOM
- /* these two look unnecessary, check guarantee for synth_ntom_set_step (in control_generic, even)! */
- fr->ntom_val[0] = NTOM_MUL>>1;
- fr->ntom_val[1] = NTOM_MUL>>1;
- fr->ntom_step = NTOM_MUL;
-#endif
- /* unnecessary: fr->buffer.size = fr->buffer.fill = 0; */
- mpg123_reset_eq(fr);
- init_icy(&fr->icy);
- init_id3(fr);
- /* frame_outbuffer is missing... */
- /* frame_buffers is missing... that one needs cpu opt setting! */
- /* after these... frame_reset is needed before starting full decode */
- invalidate_format(&fr->af);
- fr->rdat.r_read = NULL;
- fr->rdat.r_lseek = NULL;
- fr->rdat.iohandle = NULL;
- fr->rdat.r_read_handle = NULL;
- fr->rdat.r_lseek_handle = NULL;
- fr->rdat.cleanup_handle = NULL;
- fr->wrapperdata = NULL;
- fr->wrapperclean = NULL;
- fr->decoder_change = 1;
- fr->err = MPG123_OK;
- if(mp == NULL) frame_default_pars(&fr->p);
- else memcpy(&fr->p, mp, sizeof(struct mpg123_pars_struct));
-
-#ifndef NO_FEEDER
- bc_prepare(&fr->rdat.buffer, fr->p.feedpool, fr->p.feedbuffer);
-#endif
-
- fr->down_sample = 0; /* Initialize to silence harmless errors when debugging. */
- frame_fixed_reset(fr); /* Reset only the fixed data, dynamic buffers are not there yet! */
- fr->synth = NULL;
- fr->synth_mono = NULL;
- fr->make_decode_tables = NULL;
-#ifdef FRAME_INDEX
- fi_init(&fr->index);
- frame_index_setup(fr); /* Apply the size setting. */
-#endif
-}
-
-#ifdef OPT_DITHER
-/* Also, only allocate the memory for the table on demand.
- In future, one could create special noise for different sampling frequencies(?). */
-int frame_dither_init(mpg123_handle *fr)
-{
- /* run-time dither noise table generation */
- if(fr->dithernoise == NULL)
- {
- fr->dithernoise = malloc(sizeof(float)*DITHERSIZE);
- if(fr->dithernoise == NULL) return 0;
-
- dither_table_init(fr->dithernoise);
- }
- return 1;
-}
-#endif
-
-mpg123_pars attribute_align_arg *mpg123_new_pars(int *error)
-{
- mpg123_pars *mp = malloc(sizeof(struct mpg123_pars_struct));
- if(mp != NULL){ frame_default_pars(mp); if(error != NULL) *error = MPG123_OK; }
- else if(error != NULL) *error = MPG123_OUT_OF_MEM;
- return mp;
-}
-
-void attribute_align_arg mpg123_delete_pars(mpg123_pars* mp)
-{
- if(mp != NULL) free(mp);
-}
-
-int attribute_align_arg mpg123_reset_eq(mpg123_handle *mh)
-{
- int i;
- if(mh == NULL) return MPG123_BAD_HANDLE;
-
- mh->have_eq_settings = 0;
- for(i=0; i < 32; ++i) mh->equalizer[0][i] = mh->equalizer[1][i] = DOUBLE_TO_REAL(1.0);
-
- return MPG123_OK;
-}
-
-int frame_outbuffer(mpg123_handle *fr)
-{
- size_t size = fr->outblock;
- if(!fr->own_buffer)
- {
- if(fr->buffer.size < size)
- {
- fr->err = MPG123_BAD_BUFFER;
- if(NOQUIET) error2("have external buffer of size %"SIZE_P", need %"SIZE_P, (size_p)fr->buffer.size, (size_p)size);
-
- return MPG123_ERR;
- }
- }
-
- debug1("need frame buffer of %"SIZE_P, (size_p)size);
- if(fr->buffer.rdata != NULL && fr->buffer.size != size)
- {
- free(fr->buffer.rdata);
- fr->buffer.rdata = NULL;
- }
- fr->buffer.size = size;
- fr->buffer.data = NULL;
- /* be generous: use 16 byte alignment */
- if(fr->buffer.rdata == NULL) fr->buffer.rdata = (unsigned char*) malloc(fr->buffer.size+15);
- if(fr->buffer.rdata == NULL)
- {
- fr->err = MPG123_OUT_OF_MEM;
- return MPG123_ERR;
- }
- fr->buffer.data = aligned_pointer(fr->buffer.rdata, unsigned char*, 16);
- fr->own_buffer = TRUE;
- fr->buffer.fill = 0;
- return MPG123_OK;
-}
-
-int attribute_align_arg mpg123_replace_buffer(mpg123_handle *mh, unsigned char *data, size_t size)
-{
- debug2("replace buffer with %p size %"SIZE_P, data, (size_p)size);
- if(mh == NULL) return MPG123_BAD_HANDLE;
- /* Will accept any size, the error comes later... */
- if(data == NULL)
- {
- mh->err = MPG123_BAD_BUFFER;
- return MPG123_ERR;
- }
- if(mh->buffer.rdata != NULL) free(mh->buffer.rdata);
- mh->own_buffer = FALSE;
- mh->buffer.rdata = NULL;
- mh->buffer.data = data;
- mh->buffer.size = size;
- mh->buffer.fill = 0;
- return MPG123_OK;
-}
-
-#ifdef FRAME_INDEX
-int frame_index_setup(mpg123_handle *fr)
-{
- int ret = MPG123_ERR;
- if(fr->p.index_size >= 0)
- { /* Simple fixed index. */
- fr->index.grow_size = 0;
- debug1("resizing index to %li", fr->p.index_size);
- ret = fi_resize(&fr->index, (size_t)fr->p.index_size);
- debug2("index resized... %lu at %p", (unsigned long)fr->index.size, (void*)fr->index.data);
- }
- else
- { /* A growing index. We give it a start, though. */
- fr->index.grow_size = (size_t)(- fr->p.index_size);
- if(fr->index.size < fr->index.grow_size)
- ret = fi_resize(&fr->index, fr->index.grow_size);
- else
- ret = MPG123_OK; /* We have minimal size already... and since growing is OK... */
- }
- debug2("set up frame index of size %lu (ret=%i)", (unsigned long)fr->index.size, ret);
-
- return ret;
-}
-#endif
-
-static void frame_decode_buffers_reset(mpg123_handle *fr)
-{
- memset(fr->rawbuffs, 0, fr->rawbuffss);
-}
-
-int frame_buffers(mpg123_handle *fr)
-{
- int buffssize = 0;
- debug1("frame %p buffer", (void*)fr);
-/*
- the used-to-be-static buffer of the synth functions, has some subtly different types/sizes
-
- 2to1, 4to1, ntom, generic, i386: real[2][2][0x110]
- mmx, sse: short[2][2][0x110]
- i586(_dither): 4352 bytes; int/long[2][2][0x110]
- i486: int[2][2][17*FIR_BUFFER_SIZE]
- altivec: static real __attribute__ ((aligned (16))) buffs[4][4][0x110]
-
- Huh, altivec looks like fun. Well, let it be large... then, the 16 byte alignment seems to be implicit on MacOSX malloc anyway.
- Let's make a reasonable attempt to allocate enough memory...
- Keep in mind: biggest ones are i486 and altivec (mutually exclusive!), then follows i586 and normal real.
- mmx/sse use short but also real for resampling.
- Thus, minimum is 2*2*0x110*sizeof(real).
-*/
- if(fr->cpu_opts.type == altivec) buffssize = 4*4*0x110*sizeof(real);
-#ifdef OPT_I486
- else if(fr->cpu_opts.type == ivier) buffssize = 2*2*17*FIR_BUFFER_SIZE*sizeof(int);
-#endif
- else if(fr->cpu_opts.type == ifuenf || fr->cpu_opts.type == ifuenf_dither || fr->cpu_opts.type == dreidnow)
- buffssize = 2*2*0x110*4; /* don't rely on type real, we need 4352 bytes */
-
- if(2*2*0x110*sizeof(real) > buffssize)
- buffssize = 2*2*0x110*sizeof(real);
- buffssize += 15; /* For 16-byte alignment (SSE likes that). */
-
- if(fr->rawbuffs != NULL && fr->rawbuffss != buffssize)
- {
- free(fr->rawbuffs);
- fr->rawbuffs = NULL;
- }
-
- if(fr->rawbuffs == NULL) fr->rawbuffs = (unsigned char*) malloc(buffssize);
- if(fr->rawbuffs == NULL) return -1;
- fr->rawbuffss = buffssize;
- fr->short_buffs[0][0] = aligned_pointer(fr->rawbuffs,short,16);
- fr->short_buffs[0][1] = fr->short_buffs[0][0] + 0x110;
- fr->short_buffs[1][0] = fr->short_buffs[0][1] + 0x110;
- fr->short_buffs[1][1] = fr->short_buffs[1][0] + 0x110;
- fr->real_buffs[0][0] = aligned_pointer(fr->rawbuffs,real,16);
- fr->real_buffs[0][1] = fr->real_buffs[0][0] + 0x110;
- fr->real_buffs[1][0] = fr->real_buffs[0][1] + 0x110;
- fr->real_buffs[1][1] = fr->real_buffs[1][0] + 0x110;
-#ifdef OPT_I486
- if(fr->cpu_opts.type == ivier)
- {
- fr->int_buffs[0][0] = (int*) fr->rawbuffs;
- fr->int_buffs[0][1] = fr->int_buffs[0][0] + 17*FIR_BUFFER_SIZE;
- fr->int_buffs[1][0] = fr->int_buffs[0][1] + 17*FIR_BUFFER_SIZE;
- fr->int_buffs[1][1] = fr->int_buffs[1][0] + 17*FIR_BUFFER_SIZE;
- }
-#endif
-#ifdef OPT_ALTIVEC
- if(fr->cpu_opts.type == altivec)
- {
- int i,j;
- fr->areal_buffs[0][0] = (real*) fr->rawbuffs;
- for(i=0; i<4; ++i) for(j=0; j<4; ++j)
- fr->areal_buffs[i][j] = fr->areal_buffs[0][0] + (i*4+j)*0x110;
- }
-#endif
- /* now the different decwins... all of the same size, actually */
- /* The MMX ones want 32byte alignment, which I'll try to ensure manually */
- {
- int decwin_size = (512+32)*sizeof(real);
-#ifdef OPT_MMXORSSE
-#ifdef OPT_MULTI
- if(fr->cpu_opts.class == mmxsse)
- {
-#endif
- /* decwin_mmx will share, decwins will be appended ... sizeof(float)==4 */
- if(decwin_size < (512+32)*4) decwin_size = (512+32)*4;
-
- /* the second window + alignment zone -- we align for 32 bytes for SSE as
- requirement, 64 byte for matching cache line size (that matters!) */
- decwin_size += (512+32)*4 + 63;
- /* (512+32)*4/32 == 2176/32 == 68, so one decwin block retains alignment for 32 or 64 bytes */
-#ifdef OPT_MULTI
- }
-#endif
-#endif
-#if defined(OPT_ALTIVEC) || defined(OPT_ARM)
- /* sizeof(real) >= 4 ... yes, it could be 8, for example.
- We got it intialized to at least (512+32)*sizeof(real).*/
- decwin_size += 512*sizeof(real);
-#endif
- /* Hm, that's basically realloc() ... */
- if(fr->rawdecwin != NULL && fr->rawdecwins != decwin_size)
- {
- free(fr->rawdecwin);
- fr->rawdecwin = NULL;
- }
-
- if(fr->rawdecwin == NULL)
- fr->rawdecwin = (unsigned char*) malloc(decwin_size);
-
- if(fr->rawdecwin == NULL) return -1;
-
- fr->rawdecwins = decwin_size;
- fr->decwin = (real*) fr->rawdecwin;
-#ifdef OPT_MMXORSSE
-#ifdef OPT_MULTI
- if(fr->cpu_opts.class == mmxsse)
- {
-#endif
- /* align decwin, assign that to decwin_mmx, append decwins */
- /* I need to add to decwin what is missing to the next full 64 byte -- also I want to make gcc -pedantic happy... */
- fr->decwin = aligned_pointer(fr->rawdecwin,real,64);
- debug1("aligned decwin: %p", (void*)fr->decwin);
- fr->decwin_mmx = (float*)fr->decwin;
- fr->decwins = fr->decwin_mmx+512+32;
-#ifdef OPT_MULTI
- }
- else debug("no decwins/decwin_mmx for that class");
-#endif
-#endif
- }
-
- /* Layer scratch buffers are of compile-time fixed size, so allocate only once. */
- if(fr->layerscratch == NULL)
- {
- /* Allocate specific layer1/2/3 buffers, so that we know they'll work for SSE. */
- size_t scratchsize = 0;
- real *scratcher;
-#ifndef NO_LAYER1
- scratchsize += sizeof(real) * 2 * SBLIMIT;
-#endif
-#ifndef NO_LAYER2
- scratchsize += sizeof(real) * 2 * 4 * SBLIMIT;
-#endif
-#ifndef NO_LAYER3
- scratchsize += sizeof(real) * 2 * SBLIMIT * SSLIMIT; /* hybrid_in */
- scratchsize += sizeof(real) * 2 * SSLIMIT * SBLIMIT; /* hybrid_out */
-#endif
- /*
- Now figure out correct alignment:
- We need 16 byte minimum, smallest unit of the blocks is 2*SBLIMIT*sizeof(real), which is 64*4=256. Let's do 64bytes as heuristic for cache line (as proven useful in buffs above).
- */
- fr->layerscratch = malloc(scratchsize+63);
- if(fr->layerscratch == NULL) return -1;
-
- /* Get aligned part of the memory, then divide it up. */
- scratcher = aligned_pointer(fr->layerscratch,real,64);
- /* Those funky pointer casts silence compilers...
- One might change the code at hand to really just use 1D arrays, but in practice, that would not make a (positive) difference. */
-#ifndef NO_LAYER1
- fr->layer1.fraction = (real(*)[SBLIMIT])scratcher;
- scratcher += 2 * SBLIMIT;
-#endif
-#ifndef NO_LAYER2
- fr->layer2.fraction = (real(*)[4][SBLIMIT])scratcher;
- scratcher += 2 * 4 * SBLIMIT;
-#endif
-#ifndef NO_LAYER3
- fr->layer3.hybrid_in = (real(*)[SBLIMIT][SSLIMIT])scratcher;
- scratcher += 2 * SBLIMIT * SSLIMIT;
- fr->layer3.hybrid_out = (real(*)[SSLIMIT][SBLIMIT])scratcher;
- scratcher += 2 * SSLIMIT * SBLIMIT;
-#endif
- /* Note: These buffers don't need resetting here. */
- }
-
- /* Only reset the buffers we created just now. */
- frame_decode_buffers_reset(fr);
-
- debug1("frame %p buffer done", (void*)fr);
- return 0;
-}
-
-int frame_buffers_reset(mpg123_handle *fr)
-{
- fr->buffer.fill = 0; /* hm, reset buffer fill... did we do a flush? */
- fr->bsnum = 0;
- /* Wondering: could it be actually _wanted_ to retain buffer contents over different files? (special gapless / cut stuff) */
- fr->bsbuf = fr->bsspace[1];
- fr->bsbufold = fr->bsbuf;
- fr->bitreservoir = 0;
- frame_decode_buffers_reset(fr);
- memset(fr->bsspace, 0, 2*(MAXFRAMESIZE+512));
- memset(fr->ssave, 0, 34);
- fr->hybrid_blc[0] = fr->hybrid_blc[1] = 0;
- memset(fr->hybrid_block, 0, sizeof(real)*2*2*SBLIMIT*SSLIMIT);
- return 0;
-}
-
-static void frame_icy_reset(mpg123_handle* fr)
-{
-#ifndef NO_ICY
- if(fr->icy.data != NULL) free(fr->icy.data);
- fr->icy.data = NULL;
- fr->icy.interval = 0;
- fr->icy.next = 0;
-#endif
-}
-
-static void frame_free_toc(mpg123_handle *fr)
-{
- if(fr->xing_toc != NULL){ free(fr->xing_toc); fr->xing_toc = NULL; }
-}
-
-/* Just copy the Xing TOC over... */
-int frame_fill_toc(mpg123_handle *fr, unsigned char* in)
-{
- if(fr->xing_toc == NULL) fr->xing_toc = malloc(100);
- if(fr->xing_toc != NULL)
- {
- memcpy(fr->xing_toc, in, 100);
-#ifdef DEBUG
- debug("Got a TOC! Showing the values...");
- {
- int i;
- for(i=0; i<100; ++i)
- debug2("entry %i = %i", i, fr->xing_toc[i]);
- }
-#endif
- return TRUE;
- }
- return FALSE;
-}
-
-/* Prepare the handle for a new track.
- Reset variables, buffers... */
-int frame_reset(mpg123_handle* fr)
-{
- frame_buffers_reset(fr);
- frame_fixed_reset(fr);
- frame_free_toc(fr);
-#ifdef FRAME_INDEX
- fi_reset(&fr->index);
-#endif
-
- return 0;
-}
-
-/* Reset everythign except dynamic memory. */
-static void frame_fixed_reset(mpg123_handle *fr)
-{
- frame_icy_reset(fr);
- open_bad(fr);
- fr->to_decode = FALSE;
- fr->to_ignore = FALSE;
- fr->metaflags = 0;
- fr->outblock = 0; /* This will be set before decoding! */
- fr->num = -1;
- fr->input_offset = -1;
- fr->playnum = -1;
- fr->state_flags = FRAME_ACCURATE;
- fr->silent_resync = 0;
- fr->audio_start = 0;
- fr->clip = 0;
- fr->oldhead = 0;
- fr->firsthead = 0;
- fr->vbr = MPG123_CBR;
- fr->abr_rate = 0;
- fr->track_frames = 0;
- fr->track_samples = -1;
- fr->framesize=0;
- fr->mean_frames = 0;
- fr->mean_framesize = 0;
- fr->freesize = 0;
- fr->lastscale = -1;
- fr->rva.level[0] = -1;
- fr->rva.level[1] = -1;
- fr->rva.gain[0] = 0;
- fr->rva.gain[1] = 0;
- fr->rva.peak[0] = 0;
- fr->rva.peak[1] = 0;
- fr->fsizeold = 0;
- fr->firstframe = 0;
- fr->ignoreframe = fr->firstframe-fr->p.preframes;
- fr->header_change = 0;
- fr->lastframe = -1;
- fr->fresh = 1;
- fr->new_format = 0;
-#ifdef GAPLESS
- frame_gapless_init(fr,-1,0,0);
- fr->lastoff = 0;
- fr->firstoff = 0;
-#endif
-#ifdef OPT_I486
- fr->i486bo[0] = fr->i486bo[1] = FIR_SIZE-1;
-#endif
- fr->bo = 1; /* the usual bo */
-#ifdef OPT_DITHER
- fr->ditherindex = 0;
-#endif
- reset_id3(fr);
- reset_icy(&fr->icy);
- /* ICY stuff should go into icy.c, eh? */
-#ifndef NO_ICY
- fr->icy.interval = 0;
- fr->icy.next = 0;
-#endif
- fr->halfphase = 0; /* here or indeed only on first-time init? */
- fr->error_protection = 0;
- fr->freeformat_framesize = -1;
-}
-
-static void frame_free_buffers(mpg123_handle *fr)
-{
- if(fr->rawbuffs != NULL) free(fr->rawbuffs);
- fr->rawbuffs = NULL;
- fr->rawbuffss = 0;
- if(fr->rawdecwin != NULL) free(fr->rawdecwin);
- fr->rawdecwin = NULL;
- fr->rawdecwins = 0;
-#ifndef NO_8BIT
- if(fr->conv16to8_buf != NULL) free(fr->conv16to8_buf);
- fr->conv16to8_buf = NULL;
-#endif
- if(fr->layerscratch != NULL) free(fr->layerscratch);
-}
-
-void frame_exit(mpg123_handle *fr)
-{
- if(fr->buffer.rdata != NULL)
- {
- debug1("freeing buffer at %p", (void*)fr->buffer.rdata);
- free(fr->buffer.rdata);
- }
- fr->buffer.rdata = NULL;
- frame_free_buffers(fr);
- frame_free_toc(fr);
-#ifdef FRAME_INDEX
- fi_exit(&fr->index);
-#endif
-#ifdef OPT_DITHER
- if(fr->dithernoise != NULL)
- {
- free(fr->dithernoise);
- fr->dithernoise = NULL;
- }
-#endif
- exit_id3(fr);
- clear_icy(&fr->icy);
- /* Clean up possible mess from LFS wrapper. */
- if(fr->wrapperclean != NULL)
- {
- fr->wrapperclean(fr->wrapperdata);
- fr->wrapperdata = NULL;
- }
-#ifndef NO_FEEDER
- bc_cleanup(&fr->rdat.buffer);
-#endif
-}
-
-int attribute_align_arg mpg123_framedata(mpg123_handle *mh, unsigned long *header, unsigned char **bodydata, size_t *bodybytes)
-{
- if(mh == NULL) return MPG123_BAD_HANDLE;
- if(!mh->to_decode) return MPG123_ERR;
-
- if(header != NULL) *header = mh->oldhead;
- if(bodydata != NULL) *bodydata = mh->bsbuf;
- if(bodybytes != NULL) *bodybytes = mh->framesize;
-
- return MPG123_OK;
-}
-
-/*
- Fuzzy frame offset searching (guessing).
- When we don't have an accurate position, we may use an inaccurate one.
- Possibilities:
- - use approximate positions from Xing TOC (not yet parsed)
- - guess wildly from mean framesize and offset of first frame / beginning of file.
-*/
-
-static off_t frame_fuzzy_find(mpg123_handle *fr, off_t want_frame, off_t* get_frame)
-{
- /* Default is to go to the beginning. */
- off_t ret = fr->audio_start;
- *get_frame = 0;
-
- /* But we try to find something better. */
- /* Xing VBR TOC works with relative positions, both in terms of audio frames and stream bytes.
- Thus, it only works when whe know the length of things.
- Oh... I assume the offsets are relative to the _total_ file length. */
- if(fr->xing_toc != NULL && fr->track_frames > 0 && fr->rdat.filelen > 0)
- {
- /* One could round... */
- int toc_entry = (int) ((double)want_frame*100./fr->track_frames);
- /* It is an index in the 100-entry table. */
- if(toc_entry < 0) toc_entry = 0;
- if(toc_entry > 99) toc_entry = 99;
-
- /* Now estimate back what frame we get. */
- *get_frame = (off_t) ((double)toc_entry/100. * fr->track_frames);
- fr->state_flags &= ~FRAME_ACCURATE;
- fr->silent_resync = 1;
- /* Question: Is the TOC for whole file size (with/without ID3) or the "real" audio data only?
- ID3v1 info could also matter. */
- ret = (off_t) ((double)fr->xing_toc[toc_entry]/256.* fr->rdat.filelen);
- }
- else if(fr->mean_framesize > 0)
- { /* Just guess with mean framesize (may be exact with CBR files). */
- /* Query filelen here or not? */
- fr->state_flags &= ~FRAME_ACCURATE; /* Fuzzy! */
- fr->silent_resync = 1;
- *get_frame = want_frame;
- ret = (off_t) (fr->audio_start+fr->mean_framesize*want_frame);
- }
- debug5("fuzzy: want %li of %li, get %li at %li B of %li B",
- (long)want_frame, (long)fr->track_frames, (long)*get_frame, (long)ret, (long)(fr->rdat.filelen-fr->audio_start));
- return ret;
-}
-
-/*
- find the best frame in index just before the wanted one, seek to there
- then step to just before wanted one with read_frame
- do not care tabout the stuff that was in buffer but not played back
- everything that left the decoder is counted as played
-
- Decide if you want low latency reaction and accurate timing info or stable long-time playback with buffer!
-*/
-
-off_t frame_index_find(mpg123_handle *fr, off_t want_frame, off_t* get_frame)
-{
- /* default is file start if no index position */
- off_t gopos = 0;
- *get_frame = 0;
-#ifdef FRAME_INDEX
- /* Possibly use VBRI index, too? I'd need an example for this... */
- if(fr->index.fill)
- {
- /* find in index */
- size_t fi;
- /* at index fi there is frame step*fi... */
- fi = want_frame/fr->index.step;
- if(fi >= fr->index.fill) /* If we are beyond the end of frame index...*/
- {
- /* When fuzzy seek is allowed, we have some limited tolerance for the frames we want to read rather then jump over. */
- if(fr->p.flags & MPG123_FUZZY && want_frame - (fr->index.fill-1)*fr->index.step > 10)
- {
- gopos = frame_fuzzy_find(fr, want_frame, get_frame);
- if(gopos > fr->audio_start) return gopos; /* Only in that case, we have a useful guess. */
- /* Else... just continue, fuzzyness didn't help. */
- }
- /* Use the last available position, slowly advancing from that one. */
- fi = fr->index.fill - 1;
- }
- /* We have index position, that yields frame and byte offsets. */
- *get_frame = fi*fr->index.step;
- gopos = fr->index.data[fi];
- fr->state_flags |= FRAME_ACCURATE; /* When using the frame index, we are accurate. */
- }
- else
- {
-#endif
- if(fr->p.flags & MPG123_FUZZY)
- return frame_fuzzy_find(fr, want_frame, get_frame);
- /* A bit hackish here... but we need to be fresh when looking for the first header again. */
- fr->firsthead = 0;
- fr->oldhead = 0;
-#ifdef FRAME_INDEX
- }
-#endif
- debug2("index: 0x%lx for frame %li", (unsigned long)gopos, (long) *get_frame);
- return gopos;
-}
-
-off_t frame_ins2outs(mpg123_handle *fr, off_t ins)
-{
- off_t outs = 0;
- switch(fr->down_sample)
- {
- case 0:
-# ifndef NO_DOWNSAMPLE
- case 1:
- case 2:
-# endif
- outs = ins>>fr->down_sample;
- break;
-# ifndef NO_NTOM
- case 3: outs = ntom_ins2outs(fr, ins); break;
-# endif
- default: error1("Bad down_sample (%i) ... should not be possible!!", fr->down_sample);
- }
- return outs;
-}
-
-off_t frame_outs(mpg123_handle *fr, off_t num)
-{
- off_t outs = 0;
- switch(fr->down_sample)
- {
- case 0:
-# ifndef NO_DOWNSAMPLE
- case 1:
- case 2:
-# endif
- outs = (fr->spf>>fr->down_sample)*num;
- break;
-#ifndef NO_NTOM
- case 3: outs = ntom_frmouts(fr, num); break;
-#endif
- default: error1("Bad down_sample (%i) ... should not be possible!!", fr->down_sample);
- }
- return outs;
-}
-
-/* Compute the number of output samples we expect from this frame.
- This is either simple spf() or a tad more elaborate for ntom. */
-off_t frame_expect_outsamples(mpg123_handle *fr)
-{
- off_t outs = 0;
- switch(fr->down_sample)
- {
- case 0:
-# ifndef NO_DOWNSAMPLE
- case 1:
- case 2:
-# endif
- outs = fr->spf>>fr->down_sample;
- break;
-#ifndef NO_NTOM
- case 3: outs = ntom_frame_outsamples(fr); break;
-#endif
- default: error1("Bad down_sample (%i) ... should not be possible!!", fr->down_sample);
- }
- return outs;
-}
-
-off_t frame_offset(mpg123_handle *fr, off_t outs)
-{
- off_t num = 0;
- switch(fr->down_sample)
- {
- case 0:
-# ifndef NO_DOWNSAMPLE
- case 1:
- case 2:
-# endif
- num = outs/(fr->spf>>fr->down_sample);
- break;
-#ifndef NO_NTOM
- case 3: num = ntom_frameoff(fr, outs); break;
-#endif
- default: error("Bad down_sample ... should not be possible!!");
- }
- return num;
-}
-
-#ifdef GAPLESS
-/* input in _input_ samples */
-void frame_gapless_init(mpg123_handle *fr, off_t framecount, off_t bskip, off_t eskip)
-{
- debug3("frame_gapless_init: given %"OFF_P" frames, skip %"OFF_P" and %"OFF_P, (off_p)framecount, (off_p)bskip, (off_p)eskip);
- fr->gapless_frames = framecount;
- if(fr->gapless_frames > 0 && bskip >=0 && eskip >= 0)
- {
- fr->begin_s = bskip+GAPLESS_DELAY;
- fr->end_s = framecount*fr->spf-eskip+GAPLESS_DELAY;
- }
- else fr->begin_s = fr->end_s = 0;
- /* These will get proper values later, from above plus resampling info. */
- fr->begin_os = 0;
- fr->end_os = 0;
- fr->fullend_os = 0;
- debug2("frame_gapless_init: from %"OFF_P" to %"OFF_P" samples", (off_p)fr->begin_s, (off_p)fr->end_s);
-}
-
-void frame_gapless_realinit(mpg123_handle *fr)
-{
- fr->begin_os = frame_ins2outs(fr, fr->begin_s);
- fr->end_os = frame_ins2outs(fr, fr->end_s);
- if(fr->gapless_frames > 0)
- fr->fullend_os = frame_ins2outs(fr, fr->gapless_frames*fr->spf);
- else fr->fullend_os = 0;
-
- debug4("frame_gapless_realinit: from %"OFF_P" to %"OFF_P" samples (%"OFF_P", %"OFF_P")", (off_p)fr->begin_os, (off_p)fr->end_os, (off_p)fr->fullend_os, (off_p)fr->gapless_frames);
-}
-
-/* At least note when there is trouble... */
-void frame_gapless_update(mpg123_handle *fr, off_t total_samples)
-{
- off_t gapless_samples = fr->gapless_frames*fr->spf;
- debug2("gapless update with new sample count %"OFF_P" as opposed to known %"OFF_P, total_samples, gapless_samples);
- if(NOQUIET && total_samples != gapless_samples)
- fprintf(stderr, "\nWarning: Real sample count %"OFF_P" differs from given gapless sample count %"OFF_P". Frankenstein stream?\n"
- , total_samples, gapless_samples);
-
- if(gapless_samples > total_samples)
- {
- if(NOQUIET) error2("End sample count smaller than gapless end! (%"OFF_P" < %"OFF_P"). Disabling gapless mode from now on.", (off_p)total_samples, (off_p)fr->end_s);
- /* This invalidates the current position... but what should I do? */
- frame_gapless_init(fr, -1, 0, 0);
- frame_gapless_realinit(fr);
- fr->lastframe = -1;
- fr->lastoff = 0;
- }
-}
-
-#endif
-
-/* Compute the needed frame to ignore from, for getting accurate/consistent output for intended firstframe. */
-static off_t ignoreframe(mpg123_handle *fr)
-{
- off_t preshift = fr->p.preframes;
- /* Layer 3 _really_ needs at least one frame before. */
- if(fr->lay==3 && preshift < 1) preshift = 1;
- /* Layer 1 & 2 reall do not need more than 2. */
- if(fr->lay!=3 && preshift > 2) preshift = 2;
-
- return fr->firstframe - preshift;
-}
-
-/* The frame seek... This is not simply the seek to fe*fr->spf samples in output because we think of _input_ frames here.
- Seek to frame offset 1 may be just seek to 200 samples offset in output since the beginning of first frame is delay/padding.
- Hm, is that right? OK for the padding stuff, but actually, should the decoder delay be better totally hidden or not?
- With gapless, even the whole frame position could be advanced further than requested (since Homey don't play dat). */
-void frame_set_frameseek(mpg123_handle *fr, off_t fe)
-{
- fr->firstframe = fe;
-#ifdef GAPLESS
- if(fr->p.flags & MPG123_GAPLESS && fr->gapless_frames > 0)
- {
- /* Take care of the beginning... */
- off_t beg_f = frame_offset(fr, fr->begin_os);
- if(fe <= beg_f)
- {
- fr->firstframe = beg_f;
- fr->firstoff = fr->begin_os - frame_outs(fr, beg_f);
- }
- else fr->firstoff = 0;
- /* The end is set once for a track at least, on the frame_set_frameseek called in get_next_frame() */
- if(fr->end_os > 0)
- {
- fr->lastframe = frame_offset(fr,fr->end_os);
- fr->lastoff = fr->end_os - frame_outs(fr, fr->lastframe);
- } else {fr->lastframe = -1; fr->lastoff = 0; }
- } else { fr->firstoff = fr->lastoff = 0; fr->lastframe = -1; }
-#endif
- fr->ignoreframe = ignoreframe(fr);
-#ifdef GAPLESS
- debug5("frame_set_frameseek: begin at %li frames and %li samples, end at %li and %li; ignore from %li",
- (long) fr->firstframe, (long) fr->firstoff,
- (long) fr->lastframe, (long) fr->lastoff, (long) fr->ignoreframe);
-#else
- debug3("frame_set_frameseek: begin at %li frames, end at %li; ignore from %li",
- (long) fr->firstframe, (long) fr->lastframe, (long) fr->ignoreframe);
-#endif
-}
-
-void frame_skip(mpg123_handle *fr)
-{
-#ifndef NO_LAYER3
- if(fr->lay == 3) set_pointer(fr, 512);
-#endif
-}
-
-/* Sample accurate seek prepare for decoder. */
-/* This gets unadjusted output samples and takes resampling into account */
-void frame_set_seek(mpg123_handle *fr, off_t sp)
-{
- fr->firstframe = frame_offset(fr, sp);
- debug1("frame_set_seek: from %"OFF_P, fr->num);
-#ifndef NO_NTOM
- if(fr->down_sample == 3) ntom_set_ntom(fr, fr->firstframe);
-#endif
- fr->ignoreframe = ignoreframe(fr);
-#ifdef GAPLESS /* The sample offset is used for non-gapless mode, too! */
- fr->firstoff = sp - frame_outs(fr, fr->firstframe);
- debug5("frame_set_seek: begin at %li frames and %li samples, end at %li and %li; ignore from %li",
- (long) fr->firstframe, (long) fr->firstoff,
- (long) fr->lastframe, (long) fr->lastoff, (long) fr->ignoreframe);
-#else
- debug3("frame_set_seek: begin at %li frames, end at %li; ignore from %li",
- (long) fr->firstframe, (long) fr->lastframe, (long) fr->ignoreframe);
-#endif
-}
-
-int attribute_align_arg mpg123_volume_change(mpg123_handle *mh, double change)
-{
- if(mh == NULL) return MPG123_ERR;
- return mpg123_volume(mh, change + (double) mh->p.outscale);
-}
-
-int attribute_align_arg mpg123_volume(mpg123_handle *mh, double vol)
-{
- if(mh == NULL) return MPG123_ERR;
-
- if(vol >= 0) mh->p.outscale = vol;
- else mh->p.outscale = 0.;
-
- do_rva(mh);
- return MPG123_OK;
-}
-
-static int get_rva(mpg123_handle *fr, double *peak, double *gain)
-{
- double p = -1;
- double g = 0;
- int ret = 0;
- if(fr->p.rva)
- {
- int rt = 0;
- /* Should one assume a zero RVA as no RVA? */
- if(fr->p.rva == 2 && fr->rva.level[1] != -1) rt = 1;
- if(fr->rva.level[rt] != -1)
- {
- p = fr->rva.peak[rt];
- g = fr->rva.gain[rt];
- ret = 1; /* Success. */
- }
- }
- if(peak != NULL) *peak = p;
- if(gain != NULL) *gain = g;
- return ret;
-}
-
-/* adjust the volume, taking both fr->outscale and rva values into account */
-void do_rva(mpg123_handle *fr)
-{
- double peak = 0;
- double gain = 0;
- double newscale;
- double rvafact = 1;
- if(get_rva(fr, &peak, &gain))
- {
- if(NOQUIET && fr->p.verbose > 1) fprintf(stderr, "Note: doing RVA with gain %f\n", gain);
- rvafact = pow(10,gain/20);
- }
-
- newscale = fr->p.outscale*rvafact;
-
- /* if peak is unknown (== 0) this check won't hurt */
- if((peak*newscale) > 1.0)
- {
- newscale = 1.0/peak;
- warning2("limiting scale value to %f to prevent clipping with indicated peak factor of %f", newscale, peak);
- }
- /* first rva setting is forced with fr->lastscale < 0 */
- if(newscale != fr->lastscale || fr->decoder_change)
- {
- debug3("changing scale value from %f to %f (peak estimated to %f)", fr->lastscale != -1 ? fr->lastscale : fr->p.outscale, newscale, (double) (newscale*peak));
- fr->lastscale = newscale;
- /* It may be too early, actually. */
- if(fr->make_decode_tables != NULL) fr->make_decode_tables(fr); /* the actual work */
- }
-}
-
-
-int attribute_align_arg mpg123_getvolume(mpg123_handle *mh, double *base, double *really, double *rva_db)
-{
- if(mh == NULL) return MPG123_ERR;
- if(base) *base = mh->p.outscale;
- if(really) *really = mh->lastscale;
- get_rva(mh, NULL, rva_db);
- return MPG123_OK;
-}
-
-off_t attribute_align_arg mpg123_framepos(mpg123_handle *mh)
-{
- if(mh == NULL) return MPG123_ERR;
-
- return mh->input_offset;
-}
projects / reactos.git / blobdiff