+++ /dev/null
-/*
- libmpg123: MPEG Audio Decoder library
-
- copyright 1995-2014 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
-
-*/
-
-#include "mpg123lib_intern.h"
-#include "icy2utf8.h"
-#include "debug.h"
-
-#include "gapless.h"
-/* Want accurate rounding function regardless of decoder setup. */
-#define FORCE_ACCURATE
-#include "sample.h"
-
-#define SEEKFRAME(mh) ((mh)->ignoreframe < 0 ? 0 : (mh)->ignoreframe)
-
-static int initialized = 0;
-
-int attribute_align_arg mpg123_init(void)
-{
- if((sizeof(short) != 2) || (sizeof(long) < 4)) return MPG123_BAD_TYPES;
-
- if(initialized) return MPG123_OK; /* no need to initialize twice */
-
-#ifndef NO_LAYER12
- init_layer12(); /* inits also shared tables with layer1 */
-#endif
-#ifndef NO_LAYER3
- init_layer3();
-#endif
- prepare_decode_tables();
- check_decoders();
- initialized = 1;
-#if (defined REAL_IS_FLOAT) && (defined IEEE_FLOAT)
- /* This is rather pointless but it eases my mind to check that we did
- not enable the special rounding on a VAX or something. */
- if(12346 != REAL_TO_SHORT_ACCURATE(12345.67f))
- {
- error("Bad IEEE 754 rounding. Re-build libmpg123 properly.");
- return MPG123_ERR;
- }
-#endif
- return MPG123_OK;
-}
-
-void attribute_align_arg mpg123_exit(void)
-{
- /* nothing yet, but something later perhaps */
-}
-
-/* create a new handle with specified decoder, decoder can be "", "auto" or NULL for auto-detection */
-mpg123_handle attribute_align_arg *mpg123_new(const char* decoder, int *error)
-{
- return mpg123_parnew(NULL, decoder, error);
-}
-
-/* ...the full routine with optional initial parameters to override defaults. */
-mpg123_handle attribute_align_arg *mpg123_parnew(mpg123_pars *mp, const char* decoder, int *error)
-{
- mpg123_handle *fr = NULL;
- int err = MPG123_OK;
-
- if(initialized) fr = (mpg123_handle*) malloc(sizeof(mpg123_handle));
- else err = MPG123_NOT_INITIALIZED;
- if(fr != NULL)
- {
- frame_init_par(fr, mp);
- debug("cpu opt setting");
- if(frame_cpu_opt(fr, decoder) != 1)
- {
- err = MPG123_BAD_DECODER;
- frame_exit(fr);
- free(fr);
- fr = NULL;
- }
- }
- if(fr != NULL)
- {
- fr->decoder_change = 1;
- }
- else if(err == MPG123_OK) err = MPG123_OUT_OF_MEM;
-
- if(error != NULL) *error = err;
- return fr;
-}
-
-int attribute_align_arg mpg123_decoder(mpg123_handle *mh, const char* decoder)
-{
- enum optdec dt = dectype(decoder);
-
- if(mh == NULL) return MPG123_BAD_HANDLE;
-
- if(dt == nodec)
- {
- mh->err = MPG123_BAD_DECODER;
- return MPG123_ERR;
- }
- if(dt == mh->cpu_opts.type) return MPG123_OK;
-
- /* Now really change. */
- /* frame_exit(mh);
- frame_init(mh); */
- debug("cpu opt setting");
- if(frame_cpu_opt(mh, decoder) != 1)
- {
- mh->err = MPG123_BAD_DECODER;
- frame_exit(mh);
- return MPG123_ERR;
- }
- /* New buffers for decoder are created in frame_buffers() */
- if((frame_outbuffer(mh) != 0))
- {
- mh->err = MPG123_NO_BUFFERS;
- frame_exit(mh);
- return MPG123_ERR;
- }
- /* Do _not_ call decode_update here! That is only allowed after a first MPEG frame has been met. */
- mh->decoder_change = 1;
- return MPG123_OK;
-}
-
-int attribute_align_arg mpg123_param(mpg123_handle *mh, enum mpg123_parms key, long val, double fval)
-{
- int r;
-
- if(mh == NULL) return MPG123_BAD_HANDLE;
- r = mpg123_par(&mh->p, key, val, fval);
- if(r != MPG123_OK){ mh->err = r; r = MPG123_ERR; }
- else
- { /* Special treatment for some settings. */
-#ifdef FRAME_INDEX
- if(key == MPG123_INDEX_SIZE)
- { /* Apply frame index size and grow property on the fly. */
- r = frame_index_setup(mh);
- if(r != MPG123_OK) mh->err = MPG123_INDEX_FAIL;
- }
-#endif
-#ifndef NO_FEEDER
- /* Feeder pool size is applied right away, reader will react to that. */
- if(key == MPG123_FEEDPOOL || key == MPG123_FEEDBUFFER)
- bc_poolsize(&mh->rdat.buffer, mh->p.feedpool, mh->p.feedbuffer);
-#endif
- }
- return r;
-}
-
-int attribute_align_arg mpg123_par(mpg123_pars *mp, enum mpg123_parms key, long val, double fval)
-{
- int ret = MPG123_OK;
-
- if(mp == NULL) return MPG123_BAD_PARS;
- switch(key)
- {
- case MPG123_VERBOSE:
- mp->verbose = val;
- break;
- case MPG123_FLAGS:
-#ifndef GAPLESS
- if(val & MPG123_GAPLESS) ret = MPG123_NO_GAPLESS;
-#endif
- if(ret == MPG123_OK) mp->flags = val;
- debug1("set flags to 0x%lx", (unsigned long) mp->flags);
- break;
- case MPG123_ADD_FLAGS:
-#ifndef GAPLESS
- /* Enabling of gapless mode doesn't work when it's not there, but disabling (below) is no problem. */
- if(val & MPG123_GAPLESS) ret = MPG123_NO_GAPLESS;
- else
-#endif
- mp->flags |= val;
- debug1("set flags to 0x%lx", (unsigned long) mp->flags);
- break;
- case MPG123_REMOVE_FLAGS:
- mp->flags &= ~val;
- debug1("set flags to 0x%lx", (unsigned long) mp->flags);
- break;
- case MPG123_FORCE_RATE: /* should this trigger something? */
-#ifdef NO_NTOM
- if(val > 0)
- ret = MPG123_BAD_RATE;
-#else
- if(val > 96000) ret = MPG123_BAD_RATE;
- else mp->force_rate = val < 0 ? 0 : val; /* >0 means enable, 0 disable */
-#endif
- break;
- case MPG123_DOWN_SAMPLE:
-#ifdef NO_DOWNSAMPLE
- if(val != 0) ret = MPG123_BAD_RATE;
-#else
- if(val < 0 || val > 2) ret = MPG123_BAD_RATE;
- else mp->down_sample = (int)val;
-#endif
- break;
- case MPG123_RVA:
- if(val < 0 || val > MPG123_RVA_MAX) ret = MPG123_BAD_RVA;
- else mp->rva = (int)val;
- break;
- case MPG123_DOWNSPEED:
- mp->halfspeed = val < 0 ? 0 : val;
- break;
- case MPG123_UPSPEED:
- mp->doublespeed = val < 0 ? 0 : val;
- break;
- case MPG123_ICY_INTERVAL:
-#ifndef NO_ICY
- mp->icy_interval = val > 0 ? val : 0;
-#else
- if(val > 0) ret = MPG123_BAD_PARAM;
-#endif
- break;
- case MPG123_OUTSCALE:
- /* Choose the value that is non-zero, if any.
- Downscaling integers to 1.0 . */
- mp->outscale = val == 0 ? fval : (double)val/SHORT_SCALE;
- break;
- case MPG123_TIMEOUT:
-#ifdef TIMEOUT_READ
- mp->timeout = val >= 0 ? val : 0;
-#else
- if(val > 0) ret = MPG123_NO_TIMEOUT;
-#endif
- break;
- case MPG123_RESYNC_LIMIT:
- mp->resync_limit = val;
- break;
- case MPG123_INDEX_SIZE:
-#ifdef FRAME_INDEX
- mp->index_size = val;
-#else
- ret = MPG123_NO_INDEX;
-#endif
- break;
- case MPG123_PREFRAMES:
- if(val >= 0) mp->preframes = val;
- else ret = MPG123_BAD_VALUE;
- break;
- case MPG123_FEEDPOOL:
-#ifndef NO_FEEDER
- if(val >= 0) mp->feedpool = val;
- else ret = MPG123_BAD_VALUE;
-#else
- ret = MPG123_MISSING_FEATURE;
-#endif
- break;
- case MPG123_FEEDBUFFER:
-#ifndef NO_FEEDER
- if(val > 0) mp->feedbuffer = val;
- else ret = MPG123_BAD_VALUE;
-#else
- ret = MPG123_MISSING_FEATURE;
-#endif
- break;
- default:
- ret = MPG123_BAD_PARAM;
- }
- return ret;
-}
-
-int attribute_align_arg mpg123_getparam(mpg123_handle *mh, enum mpg123_parms key, long *val, double *fval)
-{
- int r;
-
- if(mh == NULL) return MPG123_BAD_HANDLE;
- r = mpg123_getpar(&mh->p, key, val, fval);
- if(r != MPG123_OK){ mh->err = r; r = MPG123_ERR; }
- return r;
-}
-
-int attribute_align_arg mpg123_getpar(mpg123_pars *mp, enum mpg123_parms key, long *val, double *fval)
-{
- int ret = 0;
-
- if(mp == NULL) return MPG123_BAD_PARS;
- switch(key)
- {
- case MPG123_VERBOSE:
- if(val) *val = mp->verbose;
- break;
- case MPG123_FLAGS:
- case MPG123_ADD_FLAGS:
- if(val) *val = mp->flags;
- break;
- case MPG123_FORCE_RATE:
- if(val)
-#ifdef NO_NTOM
- *val = 0;
-#else
- *val = mp->force_rate;
-#endif
- break;
- case MPG123_DOWN_SAMPLE:
- if(val) *val = mp->down_sample;
- break;
- case MPG123_RVA:
- if(val) *val = mp->rva;
- break;
- case MPG123_DOWNSPEED:
- if(val) *val = mp->halfspeed;
- break;
- case MPG123_UPSPEED:
- if(val) *val = mp->doublespeed;
- break;
- case MPG123_ICY_INTERVAL:
-#ifndef NO_ICY
- if(val) *val = (long)mp->icy_interval;
-#else
- if(val) *val = 0;
-#endif
- break;
- case MPG123_OUTSCALE:
- if(fval) *fval = mp->outscale;
- if(val) *val = (long)(mp->outscale*SHORT_SCALE);
- break;
- case MPG123_RESYNC_LIMIT:
- if(val) *val = mp->resync_limit;
- break;
- case MPG123_INDEX_SIZE:
- if(val)
-#ifdef FRAME_INDEX
- *val = mp->index_size;
-#else
- *val = 0; /* graceful fallback: no index is index of zero size */
-#endif
- break;
- case MPG123_PREFRAMES:
- *val = mp->preframes;
- break;
- case MPG123_FEEDPOOL:
-#ifndef NO_FEEDER
- *val = mp->feedpool;
-#else
- ret = MPG123_MISSING_FEATURE;
-#endif
- break;
- case MPG123_FEEDBUFFER:
-#ifndef NO_FEEDER
- *val = mp->feedbuffer;
-#else
- ret = MPG123_MISSING_FEATURE;
-#endif
- break;
- default:
- ret = MPG123_BAD_PARAM;
- }
- return ret;
-}
-
-int attribute_align_arg mpg123_getstate(mpg123_handle *mh, enum mpg123_state key, long *val, double *fval)
-{
- int ret = MPG123_OK;
- long theval = 0;
- double thefval = 0.;
-
- if(mh == NULL) return MPG123_BAD_HANDLE;
-
- switch(key)
- {
- case MPG123_ACCURATE:
- theval = mh->state_flags & FRAME_ACCURATE;
- break;
- case MPG123_FRANKENSTEIN:
- theval = mh->state_flags & FRAME_FRANKENSTEIN;
- break;
- case MPG123_BUFFERFILL:
-#ifndef NO_FEEDER
- {
- size_t sval = bc_fill(&mh->rdat.buffer);
- theval = (long)sval;
- if(theval < 0 || (size_t)theval != sval)
- {
- mh->err = MPG123_INT_OVERFLOW;
- ret = MPG123_ERR;
- }
- }
-#else
- mh->err = MPG123_MISSING_FEATURE;
- ret = MPG123_ERR;
-#endif
- break;
- case MPG123_FRESH_DECODER:
- theval = mh->state_flags & FRAME_FRESH_DECODER;
- mh->state_flags &= ~FRAME_FRESH_DECODER;
- break;
- default:
- mh->err = MPG123_BAD_KEY;
- ret = MPG123_ERR;
- }
-
- if(val != NULL) *val = theval;
- if(fval != NULL) *fval = thefval;
-
- return ret;
-}
-int attribute_align_arg mpg123_eq(mpg123_handle *mh, enum mpg123_channels channel, int band, double val)
-{
-#ifndef NO_EQUALIZER
- if(mh == NULL) return MPG123_BAD_HANDLE;
- if(band < 0 || band > 31){ mh->err = MPG123_BAD_BAND; return MPG123_ERR; }
- switch(channel)
- {
- case MPG123_LEFT|MPG123_RIGHT:
- mh->equalizer[0][band] = mh->equalizer[1][band] = DOUBLE_TO_REAL(val);
- break;
- case MPG123_LEFT: mh->equalizer[0][band] = DOUBLE_TO_REAL(val); break;
- case MPG123_RIGHT: mh->equalizer[1][band] = DOUBLE_TO_REAL(val); break;
- default:
- mh->err=MPG123_BAD_CHANNEL;
- return MPG123_ERR;
- }
- mh->have_eq_settings = TRUE;
-#endif
- return MPG123_OK;
-}
-
-double attribute_align_arg mpg123_geteq(mpg123_handle *mh, enum mpg123_channels channel, int band)
-{
- double ret = 0.;
-#ifndef NO_EQUALIZER
-
- /* Handle this gracefully. When there is no band, it has no volume. */
- if(mh != NULL && band > -1 && band < 32)
- switch(channel)
- {
- case MPG123_LEFT|MPG123_RIGHT:
- ret = 0.5*(REAL_TO_DOUBLE(mh->equalizer[0][band])+REAL_TO_DOUBLE(mh->equalizer[1][band]));
- break;
- case MPG123_LEFT: ret = REAL_TO_DOUBLE(mh->equalizer[0][band]); break;
- case MPG123_RIGHT: ret = REAL_TO_DOUBLE(mh->equalizer[1][band]); break;
- /* Default case is already handled: ret = 0 */
- }
-#endif
- return ret;
-}
-
-/* plain file access, no http! */
-int attribute_align_arg mpg123_open(mpg123_handle *mh, const char *path)
-{
- if(mh == NULL) return MPG123_BAD_HANDLE;
-
- mpg123_close(mh);
- return open_stream(mh, path, -1);
-}
-
-int attribute_align_arg mpg123_open_fd(mpg123_handle *mh, int fd)
-{
- if(mh == NULL) return MPG123_BAD_HANDLE;
-
- mpg123_close(mh);
- return open_stream(mh, NULL, fd);
-}
-
-int attribute_align_arg mpg123_open_handle(mpg123_handle *mh, void *iohandle)
-{
- if(mh == NULL) return MPG123_BAD_HANDLE;
-
- mpg123_close(mh);
- if(mh->rdat.r_read_handle == NULL)
- {
- mh->err = MPG123_BAD_CUSTOM_IO;
- return MPG123_ERR;
- }
- return open_stream_handle(mh, iohandle);
-}
-
-int attribute_align_arg mpg123_open_feed(mpg123_handle *mh)
-{
- if(mh == NULL) return MPG123_BAD_HANDLE;
-
- mpg123_close(mh);
- return open_feed(mh);
-}
-
-int attribute_align_arg mpg123_replace_reader( mpg123_handle *mh,
- ssize_t (*r_read) (int, void *, size_t),
- off_t (*r_lseek)(int, off_t, int) )
-{
- if(mh == NULL) return MPG123_BAD_HANDLE;
-
- mpg123_close(mh);
- mh->rdat.r_read = r_read;
- mh->rdat.r_lseek = r_lseek;
- return MPG123_OK;
-}
-
-int attribute_align_arg mpg123_replace_reader_handle( mpg123_handle *mh,
- ssize_t (*r_read) (void*, void *, size_t),
- off_t (*r_lseek)(void*, off_t, int),
- void (*cleanup)(void*) )
-{
- if(mh == NULL) return MPG123_BAD_HANDLE;
-
- mpg123_close(mh);
- mh->rdat.r_read_handle = r_read;
- mh->rdat.r_lseek_handle = r_lseek;
- mh->rdat.cleanup_handle = cleanup;
- return MPG123_OK;
-}
-
-/* Update decoding engine for
- a) a new choice of decoder
- b) a changed native format of the MPEG stream
- ... calls are only valid after parsing some MPEG frame! */
-int decode_update(mpg123_handle *mh)
-{
- long native_rate;
- int b;
-
- if(mh->num < 0)
- {
- if(!(mh->p.flags & MPG123_QUIET)) error("decode_update() has been called before reading the first MPEG frame! Internal programming error.");
-
- mh->err = MPG123_BAD_DECODER_SETUP;
- return MPG123_ERR;
- }
-
- mh->state_flags |= FRAME_FRESH_DECODER;
- native_rate = frame_freq(mh);
-
- b = frame_output_format(mh); /* Select the new output format based on given constraints. */
- if(b < 0) return MPG123_ERR;
-
- if(b == 1) mh->new_format = 1; /* Store for later... */
-
- debug3("updating decoder structure with native rate %li and af.rate %li (new format: %i)", native_rate, mh->af.rate, mh->new_format);
- if(mh->af.rate == native_rate) mh->down_sample = 0;
- else if(mh->af.rate == native_rate>>1) mh->down_sample = 1;
- else if(mh->af.rate == native_rate>>2) mh->down_sample = 2;
- else mh->down_sample = 3; /* flexible (fixed) rate */
- switch(mh->down_sample)
- {
- case 0:
- case 1:
- case 2:
- mh->down_sample_sblimit = SBLIMIT>>(mh->down_sample);
- /* With downsampling I get less samples per frame */
- mh->outblock = outblock_bytes(mh, (mh->spf>>mh->down_sample));
- break;
-#ifndef NO_NTOM
- case 3:
- {
- if(synth_ntom_set_step(mh) != 0) return -1;
- if(frame_freq(mh) > mh->af.rate)
- {
- mh->down_sample_sblimit = SBLIMIT * mh->af.rate;
- mh->down_sample_sblimit /= frame_freq(mh);
- }
- else mh->down_sample_sblimit = SBLIMIT;
- mh->outblock = outblock_bytes(mh,
- ( ( NTOM_MUL-1+mh->spf
- * (((size_t)NTOM_MUL*mh->af.rate)/frame_freq(mh))
- )/NTOM_MUL ));
- }
- break;
-#endif
- }
-
- if(!(mh->p.flags & MPG123_FORCE_MONO))
- {
- if(mh->af.channels == 1) mh->single = SINGLE_MIX;
- else mh->single = SINGLE_STEREO;
- }
- else mh->single = (mh->p.flags & MPG123_FORCE_MONO)-1;
- if(set_synth_functions(mh) != 0) return -1;;
-
- /* The needed size of output buffer may have changed. */
- if(frame_outbuffer(mh) != MPG123_OK) return -1;
-
- do_rva(mh);
- debug3("done updating decoder structure with native rate %li and af.rate %li and down_sample %i", frame_freq(mh), mh->af.rate, mh->down_sample);
-
- return 0;
-}
-
-size_t attribute_align_arg mpg123_safe_buffer(void)
-{
- /* real is the largest possible output (it's 32bit float, 32bit int or 64bit double). */
- return sizeof(real)*2*1152*NTOM_MAX;
-}
-
-size_t attribute_align_arg mpg123_outblock(mpg123_handle *mh)
-{
- /* Try to be helpful and never return zero output block size. */
- if(mh != NULL && mh->outblock > 0) return mh->outblock;
- else return mpg123_safe_buffer();
-}
-
-/* Read in the next frame we actually want for decoding.
- This includes skipping/ignoring frames, in additon to skipping junk in the parser. */
-static int get_next_frame(mpg123_handle *mh)
-{
- int change = mh->decoder_change;
- /* Ensure we got proper decoder for ignoring frames.
- Header can be changed from seeking around. But be careful: Only after at
- least one frame got read, decoder update makes sense. */
- if(mh->header_change > 1 && mh->num >= 0)
- {
- change = 1;
- mh->header_change = 0;
- debug("starting with big header change");
- if(decode_update(mh) < 0)
- return MPG123_ERR;
- }
-
- do
- {
- int b;
- /* Decode & discard some frame(s) before beginning. */
- if(mh->to_ignore && mh->num < mh->firstframe && mh->num >= mh->ignoreframe)
- {
- debug1("ignoring frame %li", (long)mh->num);
- /* Decoder structure must be current! decode_update has been called before... */
- (mh->do_layer)(mh); mh->buffer.fill = 0;
-#ifndef NO_NTOM
- /* The ignored decoding may have failed. Make sure ntom stays consistent. */
- if(mh->down_sample == 3) ntom_set_ntom(mh, mh->num+1);
-#endif
- mh->to_ignore = mh->to_decode = FALSE;
- }
- /* Read new frame data; possibly breaking out here for MPG123_NEED_MORE. */
- debug("read frame");
- mh->to_decode = FALSE;
- b = read_frame(mh); /* That sets to_decode only if a full frame was read. */
- debug4("read of frame %li returned %i (to_decode=%i) at sample %li", (long)mh->num, b, mh->to_decode, (long)mpg123_tell(mh));
- if(b == MPG123_NEED_MORE) return MPG123_NEED_MORE; /* need another call with data */
- else if(b <= 0)
- {
- /* More sophisticated error control? */
- if(b==0 || (mh->rdat.filelen >= 0 && mh->rdat.filepos == mh->rdat.filelen))
- { /* We simply reached the end. */
- mh->track_frames = mh->num + 1;
- debug("What about updating/checking gapless sample count here?");
- return MPG123_DONE;
- }
- else return MPG123_ERR; /* Some real error. */
- }
- /* Now, there should be new data to decode ... and also possibly new stream properties */
- if(mh->header_change > 1)
- {
- debug("big header change");
- change = 1;
- mh->header_change = 0;
- /* Need to update decoder structure right away since frame might need to
- be decoded on next loop iteration for properly ignoring its output. */
- if(decode_update(mh) < 0)
- return MPG123_ERR;
- }
- /* Now some accounting: Look at the numbers and decide if we want this frame. */
- ++mh->playnum;
- /* Plain skipping without decoding, only when frame is not ignored on next cycle. */
- if(mh->num < mh->firstframe || (mh->p.doublespeed && (mh->playnum % mh->p.doublespeed)))
- {
- if(!(mh->to_ignore && mh->num < mh->firstframe && mh->num >= mh->ignoreframe))
- {
- frame_skip(mh);
- /* Should one fix NtoM here or not?
- It is not work the trouble for doublespeed, but what with leading frames? */
- }
- }
- /* Or, we are finally done and have a new frame. */
- else break;
- } while(1);
-
- /* If we reach this point, we got a new frame ready to be decoded.
- All other situations resulted in returns from the loop. */
- if(change)
- {
- mh->decoder_change = 0;
- if(mh->fresh)
- {
-#ifdef GAPLESS
- int b=0;
- /* Prepare offsets for gapless decoding. */
- debug1("preparing gapless stuff with native rate %li", frame_freq(mh));
- frame_gapless_realinit(mh);
- frame_set_frameseek(mh, mh->num);
-#endif
- mh->fresh = 0;
-#ifdef GAPLESS
- /* Could this possibly happen? With a real big gapless offset... */
- if(mh->num < mh->firstframe) b = get_next_frame(mh);
- if(b < 0) return b; /* Could be error, need for more, new format... */
-#endif
- }
- }
- return MPG123_OK;
-}
-
-/* Assumption: A buffer full of zero samples can be constructed by repetition of this byte.
- Oh, and it handles some format conversion.
- Only to be used by decode_the_frame() ... */
-static int zero_byte(mpg123_handle *fr)
-{
-#ifndef NO_8BIT
- return fr->af.encoding & MPG123_ENC_8 ? fr->conv16to8[0] : 0;
-#else
- return 0; /* All normal signed formats have the zero here (even in byte form -- that may be an assumption for your funny machine...). */
-#endif
-}
-
-/*
- Not part of the api. This just decodes the frame and fills missing bits with zeroes.
- There can be frames that are broken and thus make do_layer() fail.
-*/
-static void decode_the_frame(mpg123_handle *fr)
-{
- size_t needed_bytes = decoder_synth_bytes(fr, frame_expect_outsamples(fr));
- fr->clip += (fr->do_layer)(fr);
- /*fprintf(stderr, "frame %"OFF_P": got %"SIZE_P" / %"SIZE_P"\n", fr->num,(size_p)fr->buffer.fill, (size_p)needed_bytes);*/
- /* There could be less data than promised.
- Also, then debugging, we look out for coding errors that could result in _more_ data than expected. */
-#ifdef DEBUG
- if(fr->buffer.fill != needed_bytes)
- {
-#endif
- if(fr->buffer.fill < needed_bytes)
- {
- if(VERBOSE2)
- fprintf(stderr, "Note: broken frame %li, filling up with %"SIZE_P" zeroes, from %"SIZE_P"\n", (long)fr->num, (size_p)(needed_bytes-fr->buffer.fill), (size_p)fr->buffer.fill);
-
- /*
- One could do a loop with individual samples instead... but zero is zero
- Actually, that is wrong: zero is mostly a series of null bytes,
- but we have funny 8bit formats that have a different opinion on zero...
- Unsigned 16 or 32 bit formats are handled later.
- */
- memset( fr->buffer.data + fr->buffer.fill, zero_byte(fr), needed_bytes - fr->buffer.fill );
-
- fr->buffer.fill = needed_bytes;
-#ifndef NO_NTOM
- /* ntom_val will be wrong when the decoding wasn't carried out completely */
- ntom_set_ntom(fr, fr->num+1);
-#endif
- }
-#ifdef DEBUG
- else
- {
- if(NOQUIET)
- error2("I got _more_ bytes than expected (%"SIZE_P" / %"SIZE_P"), that should not be possible!", (size_p)fr->buffer.fill, (size_p)needed_bytes);
- }
- }
-#endif
- postprocess_buffer(fr);
-}
-
-/*
- Decode the current frame into the frame structure's buffer, accessible at the location stored in <audio>, with <bytes> bytes available.
- <num> will contain the last decoded frame number. This function should be called after mpg123_framebyframe_next positioned the stream at a
- valid mp3 frame. The buffer contents will get lost on the next call to mpg123_framebyframe_next or mpg123_framebyframe_decode.
- returns
- MPG123_OK -- successfully decoded or ignored the frame, you get your output data or in case of ignored frames 0 bytes
- MPG123_DONE -- decoding finished, should not happen
- MPG123_ERR -- some error occured.
- MPG123_ERR_NULL -- audio or bytes are not pointing to valid storage addresses
- MPG123_BAD_HANDLE -- mh has not been initialized
- MPG123_NO_SPACE -- not enough space in buffer for safe decoding, should not happen
-*/
-int attribute_align_arg mpg123_framebyframe_decode(mpg123_handle *mh, off_t *num, unsigned char **audio, size_t *bytes)
-{
- if(bytes == NULL) return MPG123_ERR_NULL;
- if(audio == NULL) return MPG123_ERR_NULL;
- if(mh == NULL) return MPG123_BAD_HANDLE;
- if(mh->buffer.size < mh->outblock) return MPG123_NO_SPACE;
-
- *bytes = 0;
- mh->buffer.fill = 0; /* always start fresh */
- if(!mh->to_decode) return MPG123_OK;
-
- if(num != NULL) *num = mh->num;
- debug("decoding");
- decode_the_frame(mh);
- mh->to_decode = mh->to_ignore = FALSE;
- mh->buffer.p = mh->buffer.data;
- FRAME_BUFFERCHECK(mh);
- *audio = mh->buffer.p;
- *bytes = mh->buffer.fill;
- return MPG123_OK;
-}
-
-/*
- Find, read and parse the next mp3 frame while skipping junk and parsing id3 tags, lame headers, etc.
- Prepares everything for decoding using mpg123_framebyframe_decode.
- returns
- MPG123_OK -- new frame was read and parsed, call mpg123_framebyframe_decode to actually decode
- MPG123_NEW_FORMAT -- new frame was read, it results in changed output format, call mpg123_framebyframe_decode to actually decode
- MPG123_BAD_HANDLE -- mh has not been initialized
- MPG123_NEED_MORE -- more input data is needed to advance to the next frame. supply more input data using mpg123_feed
-*/
-int attribute_align_arg mpg123_framebyframe_next(mpg123_handle *mh)
-{
- int b;
- if(mh == NULL) return MPG123_BAD_HANDLE;
-
- mh->to_decode = mh->to_ignore = FALSE;
- mh->buffer.fill = 0;
-
- b = get_next_frame(mh);
- if(b < 0) return b;
- debug1("got next frame, %i", mh->to_decode);
-
- /* mpg123_framebyframe_decode will return MPG123_OK with 0 bytes decoded if mh->to_decode is 0 */
- if(!mh->to_decode)
- return MPG123_OK;
-
- if(mh->new_format)
- {
- debug("notifiying new format");
- mh->new_format = 0;
- return MPG123_NEW_FORMAT;
- }
-
- return MPG123_OK;
-}
-
-/*
- Put _one_ decoded frame into the frame structure's buffer, accessible at the location stored in <audio>, with <bytes> bytes available.
- The buffer contents will be lost on next call to mpg123_decode_frame.
- MPG123_OK -- successfully decoded the frame, you get your output data
- MPg123_DONE -- This is it. End.
- MPG123_ERR -- some error occured...
- MPG123_NEW_FORMAT -- new frame was read, it results in changed output format -> will be decoded on next call
- MPG123_NEED_MORE -- that should not happen as this function is intended for in-library stream reader but if you force it...
- MPG123_NO_SPACE -- not enough space in buffer for safe decoding, also should not happen
-
- num will be updated to the last decoded frame number (may possibly _not_ increase, p.ex. when format changed).
-*/
-int attribute_align_arg mpg123_decode_frame(mpg123_handle *mh, off_t *num, unsigned char **audio, size_t *bytes)
-{
- if(bytes != NULL) *bytes = 0;
- if(mh == NULL) return MPG123_BAD_HANDLE;
- if(mh->buffer.size < mh->outblock) return MPG123_NO_SPACE;
- mh->buffer.fill = 0; /* always start fresh */
- while(TRUE)
- {
- /* decode if possible */
- if(mh->to_decode)
- {
- if(mh->new_format)
- {
- debug("notifiying new format");
- mh->new_format = 0;
- return MPG123_NEW_FORMAT;
- }
- if(num != NULL) *num = mh->num;
- debug("decoding");
-
- decode_the_frame(mh);
-
- mh->to_decode = mh->to_ignore = FALSE;
- mh->buffer.p = mh->buffer.data;
- FRAME_BUFFERCHECK(mh);
- if(audio != NULL) *audio = mh->buffer.p;
- if(bytes != NULL) *bytes = mh->buffer.fill;
-
- return MPG123_OK;
- }
- else
- {
- int b = get_next_frame(mh);
- if(b < 0) return b;
- debug1("got next frame, %i", mh->to_decode);
- }
- }
-}
-
-int attribute_align_arg mpg123_read(mpg123_handle *mh, unsigned char *out, size_t size, size_t *done)
-{
- return mpg123_decode(mh, NULL, 0, out, size, done);
-}
-
-int attribute_align_arg mpg123_feed(mpg123_handle *mh, const unsigned char *in, size_t size)
-{
- if(mh == NULL) return MPG123_BAD_HANDLE;
-#ifndef NO_FEEDER
- if(size > 0)
- {
- if(in != NULL)
- {
- if(feed_more(mh, in, size) != 0) return MPG123_ERR;
- else
- {
- /* The need for more data might have triggered an error.
- This one is outdated now with the new data. */
- if(mh->err == MPG123_ERR_READER) mh->err = MPG123_OK;
-
- return MPG123_OK;
- }
- }
- else
- {
- mh->err = MPG123_NULL_BUFFER;
- return MPG123_ERR;
- }
- }
- return MPG123_OK;
-#else
- mh->err = MPG123_MISSING_FEATURE;
- return MPG123_ERR;
-#endif
-}
-
-/*
- The old picture:
- while(1) {
- len = read(0,buf,16384);
- if(len <= 0)
- break;
- ret = decodeMP3(&mp,buf,len,out,8192,&size);
- while(ret == MP3_OK) {
- write(1,out,size);
- ret = decodeMP3(&mp,NULL,0,out,8192,&size);
- }
- }
-*/
-
-int attribute_align_arg mpg123_decode(mpg123_handle *mh, const unsigned char *inmemory, size_t inmemsize, unsigned char *outmemory, size_t outmemsize, size_t *done)
-{
- int ret = MPG123_OK;
- size_t mdone = 0;
-
- if(done != NULL) *done = 0;
- if(mh == NULL) return MPG123_BAD_HANDLE;
-#ifndef NO_FEEDER
- if(inmemsize > 0 && mpg123_feed(mh, inmemory, inmemsize) != MPG123_OK)
- {
- ret = MPG123_ERR;
- goto decodeend;
- }
- if(outmemory == NULL) outmemsize = 0; /* Not just give error, give chance to get a status message. */
-
- while(ret == MPG123_OK)
- {
- debug4("decode loop, fill %i (%li vs. %li); to_decode: %i", (int)mh->buffer.fill, (long)mh->num, (long)mh->firstframe, mh->to_decode);
- /* Decode a frame that has been read before.
- This only happens when buffer is empty! */
- if(mh->to_decode)
- {
- if(mh->new_format)
- {
- debug("notifiying new format");
- mh->new_format = 0;
- ret = MPG123_NEW_FORMAT;
- goto decodeend;
- }
- if(mh->buffer.size - mh->buffer.fill < mh->outblock)
- {
- ret = MPG123_NO_SPACE;
- goto decodeend;
- }
- decode_the_frame(mh);
- mh->to_decode = mh->to_ignore = FALSE;
- mh->buffer.p = mh->buffer.data;
- debug2("decoded frame %li, got %li samples in buffer", (long)mh->num, (long)(mh->buffer.fill / (samples_to_bytes(mh, 1))));
- FRAME_BUFFERCHECK(mh);
- }
- if(mh->buffer.fill) /* Copy (part of) the decoded data to the caller's buffer. */
- {
- /* get what is needed - or just what is there */
- int a = mh->buffer.fill > (outmemsize - mdone) ? outmemsize - mdone : mh->buffer.fill;
- debug4("buffer fill: %i; copying %i (%i - %li)", (int)mh->buffer.fill, a, (int)outmemsize, (long)mdone);
- memcpy(outmemory, mh->buffer.p, a);
- /* less data in frame buffer, less needed, output pointer increase, more data given... */
- mh->buffer.fill -= a;
- outmemory += a;
- mdone += a;
- mh->buffer.p += a;
- if(!(outmemsize > mdone)) goto decodeend;
- }
- else /* If we didn't have data, get a new frame. */
- {
- int b = get_next_frame(mh);
- if(b < 0){ ret = b; goto decodeend; }
- }
- }
-decodeend:
- if(done != NULL) *done = mdone;
- return ret;
-#else
- mh->err = MPG123_MISSING_FEATURE;
- return MPG123_ERR;
-#endif
-}
-
-long attribute_align_arg mpg123_clip(mpg123_handle *mh)
-{
- long ret = 0;
-
- if(mh != NULL)
- {
- ret = mh->clip;
- mh->clip = 0;
- }
- return ret;
-}
-
-/* Simples: Track needs initializtion if no initial frame has been read yet. */
-#define track_need_init(mh) ((mh)->num < 0)
-
-static int init_track(mpg123_handle *mh)
-{
- if(track_need_init(mh))
- {
- /* Fresh track, need first frame for basic info. */
- int b = get_next_frame(mh);
- if(b < 0) return b;
- }
- return 0;
-}
-
-int attribute_align_arg mpg123_info(mpg123_handle *mh, struct mpg123_frameinfo *mi)
-{
- int b;
-
- if(mh == NULL) return MPG123_BAD_HANDLE;
- if(mi == NULL)
- {
- mh->err = MPG123_ERR_NULL;
- return MPG123_ERR;
- }
- b = init_track(mh);
- if(b < 0) return b;
-
- mi->version = mh->mpeg25 ? MPG123_2_5 : (mh->lsf ? MPG123_2_0 : MPG123_1_0);
- mi->layer = mh->lay;
- mi->rate = frame_freq(mh);
- switch(mh->mode)
- {
- case 0: mi->mode = MPG123_M_STEREO; break;
- case 1: mi->mode = MPG123_M_JOINT; break;
- case 2: mi->mode = MPG123_M_DUAL; break;
- case 3: mi->mode = MPG123_M_MONO; break;
- default: error("That mode cannot be!");
- }
- mi->mode_ext = mh->mode_ext;
- mi->framesize = mh->framesize+4; /* Include header. */
- mi->flags = 0;
- if(mh->error_protection) mi->flags |= MPG123_CRC;
- if(mh->copyright) mi->flags |= MPG123_COPYRIGHT;
- if(mh->extension) mi->flags |= MPG123_PRIVATE;
- if(mh->original) mi->flags |= MPG123_ORIGINAL;
- mi->emphasis = mh->emphasis;
- mi->bitrate = frame_bitrate(mh);
- mi->abr_rate = mh->abr_rate;
- mi->vbr = mh->vbr;
- return MPG123_OK;
-}
-
-int attribute_align_arg mpg123_getformat2( mpg123_handle *mh
-, long *rate, int *channels, int *encoding, int clear_flag )
-{
- int b;
-
- if(mh == NULL) return MPG123_BAD_HANDLE;
- b = init_track(mh);
- if(b < 0) return b;
-
- if(rate != NULL) *rate = mh->af.rate;
- if(channels != NULL) *channels = mh->af.channels;
- if(encoding != NULL) *encoding = mh->af.encoding;
- if(clear_flag) mh->new_format = 0;
- return MPG123_OK;
-}
-
-int attribute_align_arg mpg123_getformat(mpg123_handle *mh, long *rate, int *channels, int *encoding)
-{
- return mpg123_getformat2(mh, rate, channels, encoding, 1);
-}
-
-off_t attribute_align_arg mpg123_timeframe(mpg123_handle *mh, double seconds)
-{
- off_t b;
-
- if(mh == NULL) return MPG123_ERR;
- b = init_track(mh);
- if(b<0) return b;
- return (off_t)(seconds/mpg123_tpf(mh));
-}
-
-/*
- Now, where are we? We need to know the last decoded frame... and what's left of it in buffer.
- The current frame number can mean the last decoded frame or the to-be-decoded frame.
- If mh->to_decode, then mh->num frames have been decoded, the frame mh->num now coming next.
- If not, we have the possibility of mh->num+1 frames being decoded or nothing at all.
- Then, there is firstframe...when we didn't reach it yet, then the next data will come from there.
- mh->num starts with -1
-*/
-off_t attribute_align_arg mpg123_tell(mpg123_handle *mh)
-{
- if(mh == NULL) return MPG123_ERR;
- if(track_need_init(mh)) return 0;
- /* Now we have all the info at hand. */
- debug5("tell: %li/%i first %li buffer %lu; frame_outs=%li", (long)mh->num, mh->to_decode, (long)mh->firstframe, (unsigned long)mh->buffer.fill, (long)frame_outs(mh, mh->num));
-
- { /* Funny block to keep C89 happy. */
- off_t pos = 0;
- if((mh->num < mh->firstframe) || (mh->num == mh->firstframe && mh->to_decode))
- { /* We are at the beginning, expect output from firstframe on. */
- pos = frame_outs(mh, mh->firstframe);
-#ifdef GAPLESS
- pos += mh->firstoff;
-#endif
- }
- else if(mh->to_decode)
- { /* We start fresh with this frame. Buffer should be empty, but we make sure to count it in. */
- pos = frame_outs(mh, mh->num) - bytes_to_samples(mh, mh->buffer.fill);
- }
- else
- { /* We serve what we have in buffer and then the beginning of next frame... */
- pos = frame_outs(mh, mh->num+1) - bytes_to_samples(mh, mh->buffer.fill);
- }
- /* Substract padding and delay from the beginning. */
- pos = SAMPLE_ADJUST(mh,pos);
- /* Negative sample offsets are not right, less than nothing is still nothing. */
- return pos>0 ? pos : 0;
- }
-}
-
-off_t attribute_align_arg mpg123_tellframe(mpg123_handle *mh)
-{
- if(mh == NULL) return MPG123_ERR;
- if(mh->num < mh->firstframe) return mh->firstframe;
- if(mh->to_decode) return mh->num;
- /* Consider firstoff? */
- return mh->buffer.fill ? mh->num : mh->num + 1;
-}
-
-off_t attribute_align_arg mpg123_tell_stream(mpg123_handle *mh)
-{
- if(mh == NULL) return MPG123_ERR;
- /* mh->rd is at least a bad_reader, so no worry. */
- return mh->rd->tell(mh);
-}
-
-static int do_the_seek(mpg123_handle *mh)
-{
- int b;
- off_t fnum = SEEKFRAME(mh);
- mh->buffer.fill = 0;
-
- /* If we are inside the ignoreframe - firstframe window, we may get away without actual seeking. */
- if(mh->num < mh->firstframe)
- {
- mh->to_decode = FALSE; /* In any case, don't decode the current frame, perhaps ignore instead. */
- if(mh->num > fnum) return MPG123_OK;
- }
-
- /* If we are already there, we are fine either for decoding or for ignoring. */
- if(mh->num == fnum && (mh->to_decode || fnum < mh->firstframe)) return MPG123_OK;
- /* We have the frame before... just go ahead as normal. */
- if(mh->num == fnum-1)
- {
- mh->to_decode = FALSE;
- return MPG123_OK;
- }
-
- /* OK, real seeking follows... clear buffers and go for it. */
- frame_buffers_reset(mh);
-#ifndef NO_NTOM
- if(mh->down_sample == 3)
- {
- ntom_set_ntom(mh, fnum);
- debug3("fixed ntom for frame %"OFF_P" to %lu, num=%"OFF_P, (off_p)fnum, mh->ntom_val[0], (off_p)mh->num);
- }
-#endif
- b = mh->rd->seek_frame(mh, fnum);
- if(mh->header_change > 1)
- {
- if(decode_update(mh) < 0) return MPG123_ERR;
- mh->header_change = 0;
- }
- debug1("seek_frame returned: %i", b);
- if(b<0) return b;
- /* Only mh->to_ignore is TRUE. */
- if(mh->num < mh->firstframe) mh->to_decode = FALSE;
-
- mh->playnum = mh->num;
- return 0;
-}
-
-off_t attribute_align_arg mpg123_seek(mpg123_handle *mh, off_t sampleoff, int whence)
-{
- int b;
- off_t pos;
-
- pos = mpg123_tell(mh); /* adjusted samples */
- /* pos < 0 also can mean that simply a former seek failed at the lower levels.
- In that case, we only allow absolute seeks. */
- if(pos < 0 && whence != SEEK_SET)
- { /* Unless we got the obvious error of NULL handle, this is a special seek failure. */
- if(mh != NULL) mh->err = MPG123_NO_RELSEEK;
- return MPG123_ERR;
- }
- if((b=init_track(mh)) < 0) return b;
- switch(whence)
- {
- case SEEK_CUR: pos += sampleoff; break;
- case SEEK_SET: pos = sampleoff; break;
- case SEEK_END:
- /* When we do not know the end already, we can try to find it. */
- if(mh->track_frames < 1 && (mh->rdat.flags & READER_SEEKABLE))
- mpg123_scan(mh);
- if(mh->track_frames > 0) pos = SAMPLE_ADJUST(mh,frame_outs(mh, mh->track_frames)) - sampleoff;
-#ifdef GAPLESS
- else if(mh->end_os > 0) pos = SAMPLE_ADJUST(mh,mh->end_os) - sampleoff;
-#endif
- else
- {
- mh->err = MPG123_NO_SEEK_FROM_END;
- return MPG123_ERR;
- }
- break;
- default: mh->err = MPG123_BAD_WHENCE; return MPG123_ERR;
- }
- if(pos < 0) pos = 0;
- /* pos now holds the wanted sample offset in adjusted samples */
- frame_set_seek(mh, SAMPLE_UNADJUST(mh,pos));
- pos = do_the_seek(mh);
- if(pos < 0) return pos;
-
- return mpg123_tell(mh);
-}
-
-/*
- A bit more tricky... libmpg123 does not do the seeking itself.
- All it can do is to ignore frames until the wanted one is there.
- The caller doesn't know where a specific frame starts and mpg123 also only knows the general region after it scanned the file.
- Well, it is tricky...
-*/
-off_t attribute_align_arg mpg123_feedseek(mpg123_handle *mh, off_t sampleoff, int whence, off_t *input_offset)
-{
- int b;
- off_t pos;
-
- pos = mpg123_tell(mh); /* adjusted samples */
- debug3("seek from %li to %li (whence=%i)", (long)pos, (long)sampleoff, whence);
- /* The special seek error handling does not apply here... there is no lowlevel I/O. */
- if(pos < 0) return pos; /* mh == NULL is covered in mpg123_tell() */
-#ifndef NO_FEEDER
- if(input_offset == NULL)
- {
- mh->err = MPG123_NULL_POINTER;
- return MPG123_ERR;
- }
-
- if((b=init_track(mh)) < 0) return b; /* May need more to do anything at all. */
-
- switch(whence)
- {
- case SEEK_CUR: pos += sampleoff; break;
- case SEEK_SET: pos = sampleoff; break;
- case SEEK_END:
- if(mh->track_frames > 0) pos = SAMPLE_ADJUST(mh,frame_outs(mh, mh->track_frames)) - sampleoff;
-#ifdef GAPLESS
- else if(mh->end_os >= 0) pos = SAMPLE_ADJUST(mh,mh->end_os) - sampleoff;
-#endif
- else
- {
- mh->err = MPG123_NO_SEEK_FROM_END;
- return MPG123_ERR;
- }
- break;
- default: mh->err = MPG123_BAD_WHENCE; return MPG123_ERR;
- }
- if(pos < 0) pos = 0;
- frame_set_seek(mh, SAMPLE_UNADJUST(mh,pos));
- pos = SEEKFRAME(mh);
- mh->buffer.fill = 0;
-
- /* Shortcuts without modifying input stream. */
- *input_offset = mh->rdat.buffer.fileoff + mh->rdat.buffer.size;
- if(mh->num < mh->firstframe) mh->to_decode = FALSE;
- if(mh->num == pos && mh->to_decode) goto feedseekend;
- if(mh->num == pos-1) goto feedseekend;
- /* Whole way. */
- *input_offset = feed_set_pos(mh, frame_index_find(mh, SEEKFRAME(mh), &pos));
- mh->num = pos-1; /* The next read frame will have num = pos. */
- if(*input_offset < 0) return MPG123_ERR;
-
-feedseekend:
- return mpg123_tell(mh);
-#else
- mh->err = MPG123_MISSING_FEATURE;
- return MPG123_ERR;
-#endif
-}
-
-off_t attribute_align_arg mpg123_seek_frame(mpg123_handle *mh, off_t offset, int whence)
-{
- int b;
- off_t pos = 0;
-
- if(mh == NULL) return MPG123_ERR;
- if((b=init_track(mh)) < 0) return b;
-
- /* Could play games here with to_decode... */
- pos = mh->num;
- switch(whence)
- {
- case SEEK_CUR: pos += offset; break;
- case SEEK_SET: pos = offset; break;
- case SEEK_END:
- if(mh->track_frames > 0) pos = mh->track_frames - offset;
- else
- {
- mh->err = MPG123_NO_SEEK_FROM_END;
- return MPG123_ERR;
- }
- break;
- default:
- mh->err = MPG123_BAD_WHENCE;
- return MPG123_ERR;
- }
- if(pos < 0) pos = 0;
- /* Not limiting the possible position on end for the chance that there might be more to the stream than announced via track_frames. */
-
- frame_set_frameseek(mh, pos);
- pos = do_the_seek(mh);
- if(pos < 0) return pos;
-
- return mpg123_tellframe(mh);
-}
-
-int attribute_align_arg mpg123_set_filesize(mpg123_handle *mh, off_t size)
-{
- if(mh == NULL) return MPG123_BAD_HANDLE;
-
- mh->rdat.filelen = size;
- return MPG123_OK;
-}
-
-off_t attribute_align_arg mpg123_framelength(mpg123_handle *mh)
-{
- int b;
- if(mh == NULL)
- return MPG123_ERR;
- b = init_track(mh);
- if(b<0)
- return b;
- if(mh->track_frames > 0)
- return mh->track_frames;
- if(mh->rdat.filelen > 0)
- { /* A bad estimate. Ignoring tags 'n stuff. */
- double bpf = mh->mean_framesize > 0.
- ? mh->mean_framesize
- : compute_bpf(mh);
- return (off_t)((double)(mh->rdat.filelen)/bpf+0.5);
- }
- /* Last resort: No view of the future, can at least count the frames that
- were already parsed. */
- if(mh->num > -1)
- return mh->num+1;
- /* Giving up. */
- return MPG123_ERR;
-}
-
-off_t attribute_align_arg mpg123_length(mpg123_handle *mh)
-{
- int b;
- off_t length;
-
- if(mh == NULL) return MPG123_ERR;
- b = init_track(mh);
- if(b<0) return b;
- if(mh->track_samples > -1) length = mh->track_samples;
- else if(mh->track_frames > 0) length = mh->track_frames*mh->spf;
- else if(mh->rdat.filelen > 0) /* Let the case of 0 length just fall through. */
- {
- /* A bad estimate. Ignoring tags 'n stuff. */
- double bpf = mh->mean_framesize ? mh->mean_framesize : compute_bpf(mh);
- length = (off_t)((double)(mh->rdat.filelen)/bpf*mh->spf);
- }
- else if(mh->rdat.filelen == 0) return mpg123_tell(mh); /* we could be in feeder mode */
- else return MPG123_ERR; /* No length info there! */
-
- debug1("mpg123_length: internal sample length: %"OFF_P, (off_p)length);
-
- length = frame_ins2outs(mh, length);
- debug1("mpg123_length: external sample length: %"OFF_P, (off_p)length);
- length = SAMPLE_ADJUST(mh,length);
- return length;
-}
-
-
-int attribute_align_arg mpg123_scan(mpg123_handle *mh)
-{
- int b;
- off_t oldpos;
- off_t track_frames = 0;
- off_t track_samples = 0;
-
- if(mh == NULL) return MPG123_BAD_HANDLE;
- if(!(mh->rdat.flags & READER_SEEKABLE)){ mh->err = MPG123_NO_SEEK; return MPG123_ERR; }
- /* Scan through the _whole_ file, since the current position is no count but computed assuming constant samples per frame. */
- /* Also, we can just keep the current buffer and seek settings. Just operate on input frames here. */
- debug("issuing scan");
- b = init_track(mh); /* mh->num >= 0 !! */
- if(b<0)
- {
- if(b == MPG123_DONE) return MPG123_OK;
- else return MPG123_ERR; /* Must be error here, NEED_MORE is not for seekable streams. */
- }
- oldpos = mpg123_tell(mh);
- b = mh->rd->seek_frame(mh, 0);
- if(b<0 || mh->num != 0) return MPG123_ERR;
- /* One frame must be there now. */
- track_frames = 1;
- track_samples = mh->spf; /* Internal samples. */
- debug("TODO: We should disable gapless code when encountering inconsistent mh->spf!");
- debug(" ... at least unset MPG123_ACCURATE.");
- /* Do not increment mh->track_frames in the loop as tha would confuse Frankenstein detection. */
- while(read_frame(mh) == 1)
- {
- ++track_frames;
- track_samples += mh->spf;
- }
- mh->track_frames = track_frames;
- mh->track_samples = track_samples;
- debug2("Scanning yielded %"OFF_P" track samples, %"OFF_P" frames.", (off_p)mh->track_samples, (off_p)mh->track_frames);
-#ifdef GAPLESS
- /* Also, think about usefulness of that extra value track_samples ... it could be used for consistency checking. */
- if(mh->p.flags & MPG123_GAPLESS) frame_gapless_update(mh, mh->track_samples);
-#endif
- return mpg123_seek(mh, oldpos, SEEK_SET) >= 0 ? MPG123_OK : MPG123_ERR;
-}
-
-int attribute_align_arg mpg123_meta_check(mpg123_handle *mh)
-{
- if(mh != NULL) return mh->metaflags;
- else return 0;
-}
-
-void attribute_align_arg mpg123_meta_free(mpg123_handle *mh)
-{
- if(mh == NULL) return;
-
- reset_id3(mh);
- reset_icy(&mh->icy);
-}
-
-int attribute_align_arg mpg123_id3(mpg123_handle *mh, mpg123_id3v1 **v1, mpg123_id3v2 **v2)
-{
- if(v1 != NULL) *v1 = NULL;
- if(v2 != NULL) *v2 = NULL;
- if(mh == NULL) return MPG123_BAD_HANDLE;
-
- if(mh->metaflags & MPG123_ID3)
- {
- id3_link(mh);
- if(v1 != NULL && mh->rdat.flags & READER_ID3TAG) *v1 = (mpg123_id3v1*) mh->id3buf;
- if(v2 != NULL)
-#ifdef NO_ID3V2
- *v2 = NULL;
-#else
- *v2 = &mh->id3v2;
-#endif
-
- mh->metaflags |= MPG123_ID3;
- mh->metaflags &= ~MPG123_NEW_ID3;
- }
- return MPG123_OK;
-}
-
-int attribute_align_arg mpg123_icy(mpg123_handle *mh, char **icy_meta)
-{
- if(mh == NULL) return MPG123_BAD_HANDLE;
-#ifndef NO_ICY
- if(icy_meta == NULL)
- {
- mh->err = MPG123_NULL_POINTER;
- return MPG123_ERR;
- }
- *icy_meta = NULL;
-
- if(mh->metaflags & MPG123_ICY)
- {
- *icy_meta = mh->icy.data;
- mh->metaflags |= MPG123_ICY;
- mh->metaflags &= ~MPG123_NEW_ICY;
- }
- return MPG123_OK;
-#else
- mh->err = MPG123_MISSING_FEATURE;
- return MPG123_ERR;
-#endif
-}
-
-char* attribute_align_arg mpg123_icy2utf8(const char* icy_text)
-{
-#ifndef NO_ICY
- return icy2utf8(icy_text, 0);
-#else
- return NULL;
-#endif
-}
-
-/* That one is always defined... it's not worth it to remove it for NO_ID3V2. */
-enum mpg123_text_encoding attribute_align_arg mpg123_enc_from_id3(unsigned char id3_enc_byte)
-{
- switch(id3_enc_byte)
- {
- case mpg123_id3_latin1: return mpg123_text_latin1;
- case mpg123_id3_utf16bom: return mpg123_text_utf16bom; /* ID3v2.3 has UCS-2 with BOM here. */
- case mpg123_id3_utf16be: return mpg123_text_utf16be;
- case mpg123_id3_utf8: return mpg123_text_utf8;
- default: return mpg123_text_unknown;
- }
-}
-
-#ifndef NO_STRING
-int mpg123_store_utf8(mpg123_string *sb, enum mpg123_text_encoding enc, const unsigned char *source, size_t source_size)
-{
- switch(enc)
- {
-#ifndef NO_ID3V2
- /* The encodings we get from ID3v2 tags. */
- case mpg123_text_utf8:
- id3_to_utf8(sb, mpg123_id3_utf8, source, source_size, 0);
- break;
- case mpg123_text_latin1:
- id3_to_utf8(sb, mpg123_id3_latin1, source, source_size, 0);
- break;
- case mpg123_text_utf16bom:
- case mpg123_text_utf16:
- id3_to_utf8(sb, mpg123_id3_utf16bom, source, source_size, 0);
- break;
- /* Special because one cannot skip zero bytes here. */
- case mpg123_text_utf16be:
- id3_to_utf8(sb, mpg123_id3_utf16be, source, source_size, 0);
- break;
-#endif
-#ifndef NO_ICY
- /* ICY encoding... */
- case mpg123_text_icy:
- case mpg123_text_cp1252:
- {
- mpg123_free_string(sb);
- /* Paranoia: Make sure that the string ends inside the buffer... */
- if(source[source_size-1] == 0)
- {
- /* Convert from ICY encoding... with force applied or not. */
- char *tmpstring = icy2utf8((const char*)source, enc == mpg123_text_cp1252 ? 1 : 0);
- if(tmpstring != NULL)
- {
- mpg123_set_string(sb, tmpstring);
- free(tmpstring);
- }
- }
- }
- break;
-#endif
- default:
- mpg123_free_string(sb);
- }
- /* At least a trailing null of some form should be there... */
- return (sb->fill > 0) ? 1 : 0;
-}
-#endif
-
-int attribute_align_arg mpg123_index(mpg123_handle *mh, off_t **offsets, off_t *step, size_t *fill)
-{
- if(mh == NULL) return MPG123_BAD_HANDLE;
- if(offsets == NULL || step == NULL || fill == NULL)
- {
- mh->err = MPG123_BAD_INDEX_PAR;
- return MPG123_ERR;
- }
-#ifdef FRAME_INDEX
- *offsets = mh->index.data;
- *step = mh->index.step;
- *fill = mh->index.fill;
-#else
- *offsets = NULL;
- *step = 0;
- *fill = 0;
-#endif
- return MPG123_OK;
-}
-
-int attribute_align_arg mpg123_set_index(mpg123_handle *mh, off_t *offsets, off_t step, size_t fill)
-{
- if(mh == NULL) return MPG123_BAD_HANDLE;
-#ifdef FRAME_INDEX
- if(step == 0)
- {
- mh->err = MPG123_BAD_INDEX_PAR;
- return MPG123_ERR;
- }
- if(fi_set(&mh->index, offsets, step, fill) == -1)
- {
- mh->err = MPG123_OUT_OF_MEM;
- return MPG123_ERR;
- }
- return MPG123_OK;
-#else
- mh->err = MPG123_MISSING_FEATURE;
- return MPG123_ERR;
-#endif
-}
-
-int attribute_align_arg mpg123_close(mpg123_handle *mh)
-{
- if(mh == NULL) return MPG123_BAD_HANDLE;
-
- /* mh->rd is never NULL! */
- if(mh->rd->close != NULL) mh->rd->close(mh);
-
- if(mh->new_format)
- {
- debug("Hey, we are closing a track before the new format has been queried...");
- invalidate_format(&mh->af);
- mh->new_format = 0;
- }
- /* Always reset the frame buffers on close, so we cannot forget it in funky opening routines (wrappers, even). */
- frame_reset(mh);
- return MPG123_OK;
-}
-
-void attribute_align_arg mpg123_delete(mpg123_handle *mh)
-{
- if(mh != NULL)
- {
- mpg123_close(mh);
- frame_exit(mh); /* free buffers in frame */
- free(mh); /* free struct; cast? */
- }
-}
-
-static const char *mpg123_error[] =
-{
- "No error... (code 0)",
- "Unable to set up output format! (code 1)",
- "Invalid channel number specified. (code 2)",
- "Invalid sample rate specified. (code 3)",
- "Unable to allocate memory for 16 to 8 converter table! (code 4)",
- "Bad parameter id! (code 5)",
- "Bad buffer given -- invalid pointer or too small size. (code 6)",
- "Out of memory -- some malloc() failed. (code 7)",
- "You didn't initialize the library! (code 8)",
- "Invalid decoder choice. (code 9)",
- "Invalid mpg123 handle. (code 10)",
- "Unable to initialize frame buffers (out of memory?)! (code 11)",
- "Invalid RVA mode. (code 12)",
- "This build doesn't support gapless decoding. (code 13)",
- "Not enough buffer space. (code 14)",
- "Incompatible numeric data types. (code 15)",
- "Bad equalizer band. (code 16)",
- "Null pointer given where valid storage address needed. (code 17)",
- "Error reading the stream. (code 18)",
- "Cannot seek from end (end is not known). (code 19)",
- "Invalid 'whence' for seek function. (code 20)",
- "Build does not support stream timeouts. (code 21)",
- "File access error. (code 22)",
- "Seek not supported by stream. (code 23)",
- "No stream opened. (code 24)",
- "Bad parameter handle. (code 25)",
- "Invalid parameter addresses for index retrieval. (code 26)",
- "Lost track in the bytestream and did not attempt resync. (code 27)",
- "Failed to find valid MPEG data within limit on resync. (code 28)",
- "No 8bit encoding possible. (code 29)",
- "Stack alignment is not good. (code 30)",
- "You gave me a NULL buffer? (code 31)",
- "File position is screwed up, please do an absolute seek (code 32)",
- "Inappropriate NULL-pointer provided.",
- "Bad key value given.",
- "There is no frame index (disabled in this build).",
- "Frame index operation failed.",
- "Decoder setup failed (invalid combination of settings?)",
- "Feature not in this build."
- ,"Some bad value has been provided."
- ,"Low-level seeking has failed (call to lseek(), usually)."
- ,"Custom I/O obviously not prepared."
- ,"Overflow in LFS (large file support) conversion."
- ,"Overflow in integer conversion."
-};
-
-const char* attribute_align_arg mpg123_plain_strerror(int errcode)
-{
- if(errcode >= 0 && errcode < sizeof(mpg123_error)/sizeof(char*))
- return mpg123_error[errcode];
- else switch(errcode)
- {
- case MPG123_ERR:
- return "A generic mpg123 error.";
- case MPG123_DONE:
- return "Message: I am done with this track.";
- case MPG123_NEED_MORE:
- return "Message: Feed me more input data!";
- case MPG123_NEW_FORMAT:
- return "Message: Prepare for a changed audio format (query the new one)!";
- default:
- return "I have no idea - an unknown error code!";
- }
-}
-
-int attribute_align_arg mpg123_errcode(mpg123_handle *mh)
-{
- if(mh != NULL) return mh->err;
- return MPG123_BAD_HANDLE;
-}
-
-const char* attribute_align_arg mpg123_strerror(mpg123_handle *mh)
-{
- return mpg123_plain_strerror(mpg123_errcode(mh));
-}
projects / reactos.git / blobdiff