From fd6aa253594e18877ca2380961c0425a7de21b2e Mon Sep 17 00:00:00 2001 From: Warren Dukes Date: Mon, 31 May 2004 01:21:17 +0000 Subject: mp3 and ogg plugin stuff git-svn-id: https://svn.musicpd.org/mpd/trunk@1245 09075e82-0dd4-0310-85a5-a0d7c8717e4f --- src/mp3_decode.c | 620 ------------------------------------------------------- 1 file changed, 620 deletions(-) delete mode 100644 src/mp3_decode.c (limited to 'src/mp3_decode.c') diff --git a/src/mp3_decode.c b/src/mp3_decode.c deleted file mode 100644 index 467a656df..000000000 --- a/src/mp3_decode.c +++ /dev/null @@ -1,620 +0,0 @@ -/* the Music Player Daemon (MPD) - * (c)2003-2004 by Warren Dukes (shank@mercury.chem.pitt.edu) - * This project's homepage is: http://www.musicpd.org - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - */ - -#include "mp3_decode.h" - -#ifdef HAVE_MAD - -#include "pcm_utils.h" -#ifdef USE_MPD_MAD -#include "libmad/mad.h" -#else -#include -#endif -#ifdef HAVE_ID3TAG -#ifdef USE_MPD_ID3TAG -#include "libid3tag/id3tag.h" -#else -#include -#endif -#endif -#include "playerData.h" -#include "log.h" -#include "utils.h" -#include "inputStream.h" -#include "outputBuffer.h" - -#include -#include -#include -#include -#include -#include - -#define FRAMES_CUSHION 2000 - -#define READ_BUFFER_SIZE 40960 - -#define DECODE_SKIP -3 -#define DECODE_BREAK -2 -#define DECODE_CONT -1 -#define DECODE_OK 0 - -#define MUTEFRAME_SKIP 1 -#define MUTEFRAME_SEEK 2 - -/* this is stolen from mpg321! */ -struct audio_dither { - mad_fixed_t error[3]; - mad_fixed_t random; -}; - -unsigned long prng(unsigned long state) { - return (state * 0x0019660dL + 0x3c6ef35fL) & 0xffffffffL; -} - -signed long audio_linear_dither(unsigned int bits, mad_fixed_t sample, struct audio_dither *dither) { - unsigned int scalebits; - mad_fixed_t output, mask, random; - - enum { - MIN = -MAD_F_ONE, - MAX = MAD_F_ONE - 1 - }; - - sample += dither->error[0] - dither->error[1] + dither->error[2]; - - dither->error[2] = dither->error[1]; - dither->error[1] = dither->error[0] / 2; - - output = sample + (1L << (MAD_F_FRACBITS + 1 - bits - 1)); - - scalebits = MAD_F_FRACBITS + 1 - bits; - mask = (1L << scalebits) - 1; - - random = prng(dither->random); - output += (random & mask) - (dither->random & mask); - - dither->random = random; - - if (output > MAX) { - output = MAX; - - if (sample > MAX) - sample = MAX; - } - else if (output < MIN) { - output = MIN; - - if (sample < MIN) - sample = MIN; - } - - output &= ~mask; - - dither->error[0] = sample - output; - - return output >> scalebits; -} -/* end of stolen stuff from mpg321 */ - -/* decoder stuff is based on madlld */ - -#define MP3_DATA_OUTPUT_BUFFER_SIZE 4096 - -typedef struct _mp3DecodeData { - struct mad_stream stream; - struct mad_frame frame; - struct mad_synth synth; - mad_timer_t timer; - unsigned char readBuffer[READ_BUFFER_SIZE]; - char outputBuffer[MP3_DATA_OUTPUT_BUFFER_SIZE]; - char * outputPtr; - char * outputBufferEnd; - float totalTime; - float elapsedTime; - int muteFrame; - long * frameOffset; - mad_timer_t * times; - long highestFrame; - long maxFrames; - long currentFrame; - int flush; - unsigned long bitRate; - InputStream * inStream; -} mp3DecodeData; - -void initMp3DecodeData(mp3DecodeData * data, InputStream * inStream) { - data->outputPtr = data->outputBuffer; - data->outputBufferEnd = data->outputBuffer+MP3_DATA_OUTPUT_BUFFER_SIZE; - data->muteFrame = 0; - data->highestFrame = 0; - data->maxFrames = 0; - data->frameOffset = NULL; - data->times = NULL; - data->currentFrame = 0; - data->flush = 1; - data->inStream = inStream; - - mad_stream_init(&data->stream); - mad_frame_init(&data->frame); - mad_synth_init(&data->synth); - mad_timer_reset(&data->timer); -} - -int seekMp3InputBuffer(mp3DecodeData * data, long offset) { - if(seekInputStream(data->inStream,offset,SEEK_SET) < 0) { - return -1; - } - - mad_stream_buffer(&data->stream,data->readBuffer,0); - (data->stream).error = 0; - - return 0; -} - -int fillMp3InputBuffer(mp3DecodeData * data) { - size_t readSize; - size_t remaining; - size_t readed; - unsigned char * readStart; - - if((data->stream).next_frame!=NULL) { - remaining = (data->stream).bufend-(data->stream).next_frame; - memmove(data->readBuffer,(data->stream).next_frame,remaining); - readStart = (data->readBuffer)+remaining; - readSize = READ_BUFFER_SIZE-remaining; - } - else { - readSize = READ_BUFFER_SIZE; - readStart = data->readBuffer, - remaining = 0; - } - - readed = readFromInputStream(data->inStream, readStart, (size_t)1, - readSize); - if(readed <= 0 && inputStreamAtEOF(data->inStream)) return -1; - /* sleep for a fraction of a second! */ - else if(readed <= 0) my_usleep(10000); - - mad_stream_buffer(&data->stream,data->readBuffer,readed+remaining); - (data->stream).error = 0; - - return 0; -} - -int decodeNextFrameHeader(mp3DecodeData * data) { - if((data->stream).buffer==NULL || (data->stream).error==MAD_ERROR_BUFLEN) { - if(fillMp3InputBuffer(data) < 0) { - return DECODE_BREAK; - } - } - if(mad_header_decode(&data->frame.header,&data->stream)) { -#ifdef HAVE_ID3TAG - if((data->stream).error==MAD_ERROR_LOSTSYNC && - (data->stream).this_frame) - { - signed long tagsize = id3_tag_query( - (data->stream).this_frame, - (data->stream).bufend- - (data->stream).this_frame); - if(tagsize>0) { - mad_stream_skip(&(data->stream),tagsize); - return DECODE_CONT; - } - } -#endif - if(MAD_RECOVERABLE((data->stream).error)) { - return DECODE_SKIP; - } - else { - if((data->stream).error==MAD_ERROR_BUFLEN) return DECODE_CONT; - else - { - ERROR("unrecoverable frame level error " - "(%s).\n", - mad_stream_errorstr(&data->stream)); - data->flush = 0; - return DECODE_BREAK; - } - } - } - - return DECODE_OK; -} - -int decodeNextFrame(mp3DecodeData * data) { - if((data->stream).buffer==NULL || (data->stream).error==MAD_ERROR_BUFLEN) { - if(fillMp3InputBuffer(data) < 0) { - return DECODE_BREAK; - } - } - if(mad_frame_decode(&data->frame,&data->stream)) { -#ifdef HAVE_ID3TAG - if((data->stream).error==MAD_ERROR_LOSTSYNC) { - signed long tagsize = id3_tag_query( - (data->stream).this_frame, - (data->stream).bufend- - (data->stream).this_frame); - if(tagsize>0) { - mad_stream_skip(&(data->stream),tagsize); - return DECODE_CONT; - } - } -#endif - if(MAD_RECOVERABLE((data->stream).error)) { - return DECODE_SKIP; - } - else { - if((data->stream).error==MAD_ERROR_BUFLEN) return DECODE_CONT; - else - { - ERROR("unrecoverable frame level error " - "(%s).\n", - mad_stream_errorstr(&data->stream)); - data->flush = 0; - return DECODE_BREAK; - } - } - } - - return DECODE_OK; -} - -/* xing stuff stolen from alsaplayer */ -# define XING_MAGIC (('X' << 24) | ('i' << 16) | ('n' << 8) | 'g') - -struct xing { - long flags; /* valid fields (see below) */ - unsigned long frames; /* total number of frames */ - unsigned long bytes; /* total number of bytes */ - unsigned char toc[100]; /* 100-point seek table */ - long scale; /* ?? */ -}; - -enum { - XING_FRAMES = 0x00000001L, - XING_BYTES = 0x00000002L, - XING_TOC = 0x00000004L, - XING_SCALE = 0x00000008L -}; - -int parse_xing(struct xing *xing, struct mad_bitptr ptr, unsigned int bitlen) -{ - if (bitlen < 64 || mad_bit_read(&ptr, 32) != XING_MAGIC) goto fail; - - xing->flags = mad_bit_read(&ptr, 32); - bitlen -= 64; - - if (xing->flags & XING_FRAMES) { - if (bitlen < 32) goto fail; - xing->frames = mad_bit_read(&ptr, 32); - bitlen -= 32; - } - - if (xing->flags & XING_BYTES) { - if (bitlen < 32) goto fail; - xing->bytes = mad_bit_read(&ptr, 32); - bitlen -= 32; - } - - if (xing->flags & XING_TOC) { - int i; - if (bitlen < 800) goto fail; - for (i = 0; i < 100; ++i) xing->toc[i] = mad_bit_read(&ptr, 8); - bitlen -= 800; - } - - if (xing->flags & XING_SCALE) { - if (bitlen < 32) goto fail; - xing->scale = mad_bit_read(&ptr, 32); - bitlen -= 32; - } - - return 1; - -fail: - xing->flags = 0; - return 0; -} - -int decodeFirstFrame(mp3DecodeData * data, DecoderControl * dc) { - struct xing xing; - int ret; - int skip; - - memset(&xing,0,sizeof(struct xing)); - xing.flags = 0; - - while(1) { - skip = 0; - while((ret = decodeNextFrameHeader(data))==DECODE_CONT && - (!dc || !dc->stop)); - if(ret==DECODE_SKIP) skip = 1; - else if(ret==DECODE_BREAK || (dc && dc->stop)) return -1; - while((ret = decodeNextFrame(data))==DECODE_CONT && - (!dc || !dc->stop)); - if(ret==DECODE_BREAK || (dc && dc->stop)) return -1; - if(!skip && ret==DECODE_OK) break; - } - - if(parse_xing(&xing,data->stream.anc_ptr,data->stream.anc_bitlen)) { - if(xing.flags & XING_FRAMES) { - mad_timer_t duration = data->frame.header.duration; - mad_timer_multiply(&duration,xing.frames); - data->muteFrame = MUTEFRAME_SKIP; - data->totalTime = ((float)mad_timer_count(duration, - MAD_UNITS_MILLISECONDS))/1000; - data->maxFrames = xing.frames; - } - } - else { - size_t offset = data->inStream->offset; - mad_timer_t duration = data->frame.header.duration; - float frameTime = ((float)mad_timer_count(duration, - MAD_UNITS_MILLISECONDS))/1000; - if(data->stream.this_frame!=NULL) { - offset-= data->stream.bufend-data->stream.this_frame; - } - else { - offset-= data->stream.bufend-data->stream.buffer; - } - if(data->inStream->size >= offset) { - data->totalTime = ((data->inStream->size-offset)*8.0)/ - (data->frame).header.bitrate; - data->maxFrames = - data->totalTime/frameTime+FRAMES_CUSHION; - } - else { - data->maxFrames = FRAMES_CUSHION; - data->totalTime = 0; - } - } - - data->frameOffset = malloc(sizeof(long)*data->maxFrames); - data->times = malloc(sizeof(mad_timer_t)*data->maxFrames); - - return 0; -} - -void mp3DecodeDataFinalize(mp3DecodeData * data) { - mad_synth_finish(&data->synth); - mad_frame_finish(&data->frame); - mad_stream_finish(&data->stream); - - closeInputStream(data->inStream); - if(data->frameOffset) free(data->frameOffset); - if(data->times) free(data->times); -} - -/* this is primarily used for getting total time for tags */ -int getMp3TotalTime(char * file) { - InputStream inStream; - mp3DecodeData data; - int ret; - - if(openInputStream(&inStream, file) < 0) return -1; - initMp3DecodeData(&data,&inStream); - data.stream.options |= MAD_OPTION_IGNORECRC; - if(decodeFirstFrame(&data, NULL)<0) ret = -1; - else ret = data.totalTime+0.5; - mp3DecodeDataFinalize(&data); - - return ret; -} - -int openMp3FromInputStream(InputStream * inStream, mp3DecodeData * data, - DecoderControl * dc, int ignoreCrc) -{ - initMp3DecodeData(data, inStream); - if(ignoreCrc) data->stream.options |= MAD_OPTION_IGNORECRC; - if(decodeFirstFrame(data, dc)<0) { - mp3DecodeDataFinalize(data); - return -1; - } - - return 0; -} - -int mp3Read(mp3DecodeData * data, OutputBuffer * cb, DecoderControl * dc) { - int i; - int ret; - struct audio_dither dither; - int skip; - - if(data->currentFrame>=data->highestFrame) { - mad_timer_add(&data->timer,(data->frame).header.duration); - data->bitRate = (data->frame).header.bitrate; - if(data->currentFrame>=data->maxFrames) { - data->currentFrame = data->maxFrames - 1; - } - else data->highestFrame++; - data->frameOffset[data->currentFrame] = data->inStream->offset; - if(data->stream.this_frame!=NULL) { - data->frameOffset[data->currentFrame]-= - data->stream.bufend- - data->stream.this_frame; - } - else { - data->frameOffset[data->currentFrame]-= - data->stream.bufend-data->stream.buffer; - } - data->times[data->currentFrame] = data->timer; - } - else data->timer = data->times[data->currentFrame]; - data->currentFrame++; - data->elapsedTime = ((float)mad_timer_count(data->timer,MAD_UNITS_MILLISECONDS))/1000; - - switch(data->muteFrame) { - case MUTEFRAME_SKIP: - data->muteFrame = 0; - break; - case MUTEFRAME_SEEK: - if(dc->seekWhere<=data->elapsedTime) { - data->outputPtr = data->outputBuffer; - clearOutputBuffer(cb); - data->muteFrame = 0; - dc->seek = 0; - } - break; - default: - mad_synth_frame(&data->synth,&data->frame); - - for(i=0;i<(data->synth).pcm.length;i++) { - mpd_sint16 * sample; - - sample = (mpd_sint16 *)data->outputPtr; - *sample = (mpd_sint16) audio_linear_dither(16, - (data->synth).pcm.samples[0][i], - &dither); - data->outputPtr+=2; - - if(MAD_NCHANNELS(&(data->frame).header)==2) { - sample = (mpd_sint16 *)data->outputPtr; - *sample = (mpd_sint16) audio_linear_dither(16, - (data->synth).pcm.samples[1][i], - &dither); - data->outputPtr+=2; - } - - if(data->outputPtr==data->outputBufferEnd) { - long ret; - ret = sendDataToOutputBuffer(cb, - data->inStream, - dc, - data->inStream->seekable, - data->outputBuffer, - MP3_DATA_OUTPUT_BUFFER_SIZE, - data->elapsedTime, - data->bitRate/1000); - if(ret == OUTPUT_BUFFER_DC_STOP) { - return DECODE_BREAK; - } - - data->outputPtr = data->outputBuffer; - - if(ret == OUTPUT_BUFFER_DC_SEEK) break; - } - } - - if(dc->seek && data->inStream->seekable) { - long i = 0; - data->muteFrame = MUTEFRAME_SEEK; - while(ihighestFrame && dc->seekWhere > - ((float)mad_timer_count(data->times[i], - MAD_UNITS_MILLISECONDS))/1000) - { - i++; - } - if(ihighestFrame) { - if(seekMp3InputBuffer(data, - data->frameOffset[i]) == 0) - { - data->outputPtr = data->outputBuffer; - clearOutputBuffer(cb); - data->currentFrame = i; - } - else dc->seekError = 1; - data->muteFrame = 0; - dc->seek = 0; - } - } - else if(dc->seek && !data->inStream->seekable) { - dc->seek = 0; - dc->seekError = 1; - } - } - - while(1) { - skip = 0; - while((ret = decodeNextFrameHeader(data))==DECODE_CONT && - !dc->stop && !dc->seek); - if(ret==DECODE_BREAK || dc->stop || dc->seek) break; - else if(ret==DECODE_SKIP) skip = 1; - if(!data->muteFrame) { - while((ret = decodeNextFrame(data))==DECODE_CONT && - !dc->stop && !dc->seek); - if(ret==DECODE_BREAK || dc->stop || dc->seek) break; - } - if(!skip && ret==DECODE_OK) break; - } - - if(dc->stop) return DECODE_BREAK; - - return ret; -} - -void initAudioFormatFromMp3DecodeData(mp3DecodeData * data, AudioFormat * af) { - af->bits = 16; - af->sampleRate = (data->frame).header.samplerate; - af->channels = MAD_NCHANNELS(&(data->frame).header); -} - -int mp3_decode(OutputBuffer * cb, DecoderControl * dc, InputStream * inStream, - int ignoreCrc) -{ - mp3DecodeData data; - - if(openMp3FromInputStream(inStream, &data, dc, ignoreCrc) < 0) { - closeInputStream(inStream); - if(!dc->stop) { - ERROR("Input does not appear to be a mp3 bit stream.\n"); - return -1; - } - else { - dc->state = DECODE_STATE_STOP; - dc->stop = 0; - } - return 0; - } - - initAudioFormatFromMp3DecodeData(&data, &(dc->audioFormat)); - getOutputAudioFormat(&(dc->audioFormat), &(cb->audioFormat)); - - dc->totalTime = data.totalTime; - dc->state = DECODE_STATE_DECODE; - - while(mp3Read(&data,cb,dc)!=DECODE_BREAK); - /* send last little bit if not dc->stop */ - if(data.outputPtr!=data.outputBuffer && data.flush) { - sendDataToOutputBuffer(cb, NULL, dc, - data.inStream->seekable, - data.outputBuffer, - data.outputPtr-data.outputBuffer, - data.elapsedTime,data.bitRate/1000); - } - - flushOutputBuffer(cb); - mp3DecodeDataFinalize(&data); - - /*if(dc->seek) { - dc->seekError = 1; - dc->seek = 0; - }*/ - - if(dc->stop) { - dc->state = DECODE_STATE_STOP; - dc->stop = 0; - } - else dc->state = DECODE_STATE_STOP; - - return 0; -} - -#endif -/* vim:set shiftwidth=8 tabstop=8 expandtab: */ -- cgit v1.2.3