diff options
Diffstat (limited to 'trunk/src/inputPlugins/mp3_plugin.c')
| -rw-r--r-- | trunk/src/inputPlugins/mp3_plugin.c | 1092 |
1 files changed, 0 insertions, 1092 deletions
diff --git a/trunk/src/inputPlugins/mp3_plugin.c b/trunk/src/inputPlugins/mp3_plugin.c deleted file mode 100644 index a920b98a1..000000000 --- a/trunk/src/inputPlugins/mp3_plugin.c +++ /dev/null @@ -1,1092 +0,0 @@ -/* the Music Player Daemon (MPD) - * Copyright (C) 2003-2007 by Warren Dukes (warren.dukes@gmail.com) - * 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 "../inputPlugin.h" - -#ifdef HAVE_MAD - -#include "../pcm_utils.h" -#include <mad.h> - -#ifdef HAVE_ID3TAG -#include <id3tag.h> -#endif - -#include "../log.h" -#include "../utils.h" -#include "../replayGain.h" -#include "../tag.h" -#include "../conf.h" - -#include <stdio.h> -#include <stdlib.h> -#include <string.h> -#include <sys/types.h> -#include <sys/stat.h> -#include <unistd.h> -#include <errno.h> - -#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 - -/* the number of samples of silence the decoder inserts at start */ -#define DECODERDELAY 529 - -#define DEFAULT_GAPLESS_MP3_PLAYBACK 1 - -static int gaplessPlayback; - -/* this is stolen from mpg321! */ -struct audio_dither { - mad_fixed_t error[3]; - mad_fixed_t random; -}; - -static unsigned long prng(unsigned long state) -{ - return (state * 0x0019660dL + 0x3c6ef35fL) & 0xffffffffL; -} - -static 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 */ - -static int mp3_plugin_init(void) -{ - gaplessPlayback = getBoolConfigParam(CONF_GAPLESS_MP3_PLAYBACK); - if (gaplessPlayback == -1) gaplessPlayback = DEFAULT_GAPLESS_MP3_PLAYBACK; - else if (gaplessPlayback < 0) exit(EXIT_FAILURE); - return 1; -} - -/* 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 dropFramesAtStart; - int dropFramesAtEnd; - int dropSamplesAtStart; - int dropSamplesAtEnd; - int foundXing; - int foundFirstFrame; - int decodedFirstFrame; - int flush; - unsigned long bitRate; - InputStream *inStream; - struct audio_dither dither; - enum mad_layer layer; -} mp3DecodeData; - -static 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->dropFramesAtStart = 0; - data->dropFramesAtEnd = 0; - data->dropSamplesAtStart = 0; - data->dropSamplesAtEnd = 0; - data->foundXing = 0; - data->foundFirstFrame = 0; - data->decodedFirstFrame = 0; - data->flush = 1; - data->inStream = inStream; - data->layer = 0; - memset(&(data->dither), 0, sizeof(struct audio_dither)); - - mad_stream_init(&data->stream); - mad_stream_options(&data->stream, MAD_OPTION_IGNORECRC); - mad_frame_init(&data->frame); - mad_synth_init(&data->synth); - mad_timer_reset(&data->timer); -} - -static 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; -} - -static 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; - } - - /* we've exhausted the read buffer, so give up!, these potential - * mp3 frames are way too big, and thus unlikely to be mp3 frames */ - if (readSize == 0) - return -1; - - 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) { - readed = 0; - my_usleep(10000); - } - - mad_stream_buffer(&data->stream, data->readBuffer, readed + remaining); - (data->stream).error = 0; - - return 0; -} - -#ifdef HAVE_ID3TAG -static ReplayGainInfo *parseId3ReplayGainInfo(struct id3_tag *tag) -{ - int i; - char *key; - char *value; - struct id3_frame *frame; - int found = 0; - ReplayGainInfo *replayGainInfo; - - replayGainInfo = newReplayGainInfo(); - - for (i = 0; (frame = id3_tag_findframe(tag, "TXXX", i)); i++) { - if (frame->nfields < 3) - continue; - - key = (char *) - id3_ucs4_latin1duplicate(id3_field_getstring - (&frame->fields[1])); - value = (char *) - id3_ucs4_latin1duplicate(id3_field_getstring - (&frame->fields[2])); - - if (strcasecmp(key, "replaygain_track_gain") == 0) { - replayGainInfo->trackGain = atof(value); - found = 1; - } else if (strcasecmp(key, "replaygain_album_gain") == 0) { - replayGainInfo->albumGain = atof(value); - found = 1; - } else if (strcasecmp(key, "replaygain_track_peak") == 0) { - replayGainInfo->trackPeak = atof(value); - found = 1; - } else if (strcasecmp(key, "replaygain_album_peak") == 0) { - replayGainInfo->albumPeak = atof(value); - found = 1; - } - - free(key); - free(value); - } - - if (found) - return replayGainInfo; - freeReplayGainInfo(replayGainInfo); - return NULL; -} -#endif - -#ifdef HAVE_ID3TAG -static void mp3_parseId3Tag(mp3DecodeData * data, signed long tagsize, - MpdTag ** mpdTag, ReplayGainInfo ** replayGainInfo) -{ - struct id3_tag *id3Tag = NULL; - id3_length_t count; - id3_byte_t const *id3_data; - id3_byte_t *allocated = NULL; - MpdTag *tmpMpdTag; - ReplayGainInfo *tmpReplayGainInfo; - - count = data->stream.bufend - data->stream.this_frame; - - if (tagsize <= count) { - id3_data = data->stream.this_frame; - mad_stream_skip(&(data->stream), tagsize); - } else { - allocated = xmalloc(tagsize); - if (!allocated) - goto fail; - - memcpy(allocated, data->stream.this_frame, count); - mad_stream_skip(&(data->stream), count); - - while (count < tagsize) { - int len; - - len = readFromInputStream(data->inStream, - allocated + count, (size_t) 1, - tagsize - count); - if (len <= 0 && inputStreamAtEOF(data->inStream)) { - break; - } else if (len <= 0) - my_usleep(10000); - else - count += len; - } - - if (count != tagsize) { - DEBUG("mp3_decode: error parsing ID3 tag\n"); - goto fail; - } - - id3_data = allocated; - } - - id3Tag = id3_tag_parse(id3_data, tagsize); - if (!id3Tag) - goto fail; - - if (mpdTag) { - tmpMpdTag = parseId3Tag(id3Tag); - if (tmpMpdTag) { - if (*mpdTag) - freeMpdTag(*mpdTag); - *mpdTag = tmpMpdTag; - } - } - - if (replayGainInfo) { - tmpReplayGainInfo = parseId3ReplayGainInfo(id3Tag); - if (tmpReplayGainInfo) { - if (*replayGainInfo) - freeReplayGainInfo(*replayGainInfo); - *replayGainInfo = tmpReplayGainInfo; - } - } - - id3_tag_delete(id3Tag); -fail: - if (allocated) - free(allocated); -} -#endif - -static int decodeNextFrameHeader(mp3DecodeData * data, MpdTag ** tag, - ReplayGainInfo ** replayGainInfo) -{ - enum mad_layer layer; - - 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) { - if (tag && !(*tag)) { - mp3_parseId3Tag(data, tagsize, tag, - replayGainInfo); - } else { - 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; - } - } - } - - layer = data->frame.header.layer; - if (!data->layer) { - if (layer != MAD_LAYER_II && layer != MAD_LAYER_III) { - /* Only layer 2 and 3 have been tested to work */ - return DECODE_SKIP; - } - data->layer = layer; - } else if (layer != data->layer) { - /* Don't decode frames with a different layer than the first */ - return DECODE_SKIP; - } - - return DECODE_OK; -} - -static 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, and heavily modified by jat */ -#define XI_MAGIC (('X' << 8) | 'i') -#define NG_MAGIC (('n' << 8) | 'g') -#define IN_MAGIC (('I' << 8) | 'n') -#define FO_MAGIC (('f' << 8) | 'o') - -enum xing_magic { - XING_MAGIC_XING, /* VBR */ - XING_MAGIC_INFO /* CBR */ -}; - -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; /* VBR quality */ - enum xing_magic magic; /* header magic */ -}; - -enum { - XING_FRAMES = 0x00000001L, - XING_BYTES = 0x00000002L, - XING_TOC = 0x00000004L, - XING_SCALE = 0x00000008L -}; - -struct lame { - char encoder[10]; /* 9 byte encoder name/version ("LAME3.97b") */ -#if 0 - /* See related comment in parse_lame() */ - float peak; /* replaygain peak */ - float trackGain; /* replaygain track gain */ - float albumGain; /* replaygain album gain */ -#endif - int encoderDelay; /* # of added samples at start of mp3 */ - int encoderPadding; /* # of added samples at end of mp3 */ -}; - -static int parse_xing(struct xing *xing, struct mad_bitptr *ptr, int *oldbitlen) -{ - unsigned long bits; - int bitlen; - int bitsleft; - int i; - - bitlen = *oldbitlen; - - if (bitlen < 16) goto fail; - bits = mad_bit_read(ptr, 16); - bitlen -= 16; - - if (bits == XI_MAGIC) { - if (bitlen < 16) goto fail; - if (mad_bit_read(ptr, 16) != NG_MAGIC) goto fail; - bitlen -= 16; - xing->magic = XING_MAGIC_XING; - } else if (bits == IN_MAGIC) { - if (bitlen < 16) goto fail; - if (mad_bit_read(ptr, 16) != FO_MAGIC) goto fail; - bitlen -= 16; - xing->magic = XING_MAGIC_INFO; - } - else if (bits == NG_MAGIC) xing->magic = XING_MAGIC_XING; - else if (bits == FO_MAGIC) xing->magic = XING_MAGIC_INFO; - else goto fail; - - if (bitlen < 32) goto fail; - xing->flags = mad_bit_read(ptr, 32); - bitlen -= 32; - - 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) { - 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; - } - - /* Make sure we consume no less than 120 bytes (960 bits) in hopes that - * the LAME tag is found there, and not right after the Xing header */ - bitsleft = 960 - ((*oldbitlen) - bitlen); - if (bitsleft < 0) goto fail; - else if (bitsleft > 0) { - mad_bit_read(ptr, bitsleft); - bitlen -= bitsleft; - } - - *oldbitlen = bitlen; - - return 1; -fail: - xing->flags = 0; - return 0; -} - -static int parse_lame(struct lame *lame, struct mad_bitptr *ptr, int *bitlen) -{ - int i; - - /* Unlike the xing header, the lame tag has a fixed length. Fail if - * not all 36 bytes (288 bits) are there. */ - if (*bitlen < 288) return 0; - - for (i = 0; i < 9; i++) lame->encoder[i] = (char)mad_bit_read(ptr, 8); - lame->encoder[9] = '\0'; - - /* This is technically incorrect, since the encoder might not be lame. - * But there's no other way to determine if this is a lame tag, and we - * wouldn't want to go reading a tag that's not there. */ - if (strncmp(lame->encoder, "LAME", 4) != 0) return 0; - -#if 0 - /* Apparently lame versions <3.97b1 do not calculate replaygain. I'm - * using lame 3.97b2, and while it does calculate replaygain, it's - * setting the values to 0. Using --replaygain-(fast|accurate) doesn't - * make any difference. Leaving this code unused until we have a way - * of testing it. -- jat */ - - mad_bit_read(ptr, 16); - - mad_bit_read(ptr, 32); /* peak */ - - mad_bit_read(ptr, 6); /* header */ - bits = mad_bit_read(ptr, 1); /* sign bit */ - lame->trackGain = mad_bit_read(ptr, 9); /* gain*10 */ - lame->trackGain = (bits ? -lame->trackGain : lame->trackGain) / 10; - - mad_bit_read(ptr, 6); /* header */ - bits = mad_bit_read(ptr, 1); /* sign bit */ - lame->albumGain = mad_bit_read(ptr, 9); /* gain*10 */ - lame->albumGain = (bits ? -lame->albumGain : lame->albumGain) / 10; - - mad_bit_read(ptr, 16); -#else - mad_bit_read(ptr, 96); -#endif - - lame->encoderDelay = mad_bit_read(ptr, 12); - lame->encoderPadding = mad_bit_read(ptr, 12); - - mad_bit_read(ptr, 96); - - *bitlen -= 288; - - return 1; -} - -static int decodeFirstFrame(mp3DecodeData * data, DecoderControl * dc, - MpdTag ** tag, ReplayGainInfo ** replayGainInfo) -{ - struct xing xing; - struct lame lame; - struct mad_bitptr ptr; - int bitlen; - int ret; - - /* stfu gcc */ - memset(&xing, 0, sizeof(struct xing)); - xing.flags = 0; - - while (1) { - while ((ret = decodeNextFrameHeader(data, tag, replayGainInfo)) == DECODE_CONT && - (!dc || !dc->stop)); - if (ret == DECODE_BREAK || (dc && dc->stop)) return -1; - if (ret == DECODE_SKIP) continue; - - while ((ret = decodeNextFrame(data)) == DECODE_CONT && - (!dc || !dc->stop)); - if (ret == DECODE_BREAK || (dc && dc->stop)) return -1; - if (ret == DECODE_OK) break; - } - - ptr = data->stream.anc_ptr; - bitlen = data->stream.anc_bitlen; - - /* - * Attempt to calulcate the length of the song from filesize - */ - { - 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; - } - } - /* - * if an xing tag exists, use that! - */ - if (parse_xing(&xing, &ptr, &bitlen)) { - data->foundXing = 1; - data->muteFrame = MUTEFRAME_SKIP; - - if (gaplessPlayback && data->inStream->seekable && - parse_lame(&lame, &ptr, &bitlen)) { - data->dropSamplesAtStart = lame.encoderDelay + DECODERDELAY; - data->dropSamplesAtEnd = lame.encoderPadding; - } - - if ((xing.flags & XING_FRAMES) && xing.frames) { - mad_timer_t duration = data->frame.header.duration; - mad_timer_multiply(&duration, xing.frames); - data->totalTime = ((float)mad_timer_count(duration, MAD_UNITS_MILLISECONDS)) / 1000; - data->maxFrames = xing.frames; - } - } - - if (!data->maxFrames) return -1; - - data->frameOffset = xmalloc(sizeof(long) * data->maxFrames); - data->times = xmalloc(sizeof(mad_timer_t) * data->maxFrames); - - return 0; -} - -static void mp3DecodeDataFinalize(mp3DecodeData * data) -{ - mad_synth_finish(&data->synth); - mad_frame_finish(&data->frame); - mad_stream_finish(&data->stream); - - if (data->frameOffset) free(data->frameOffset); - if (data->times) free(data->times); -} - -/* this is primarily used for getting total time for tags */ -static int getMp3TotalTime(char *file) -{ - InputStream inStream; - mp3DecodeData data; - int ret; - - if (openInputStream(&inStream, file) < 0) - return -1; - initMp3DecodeData(&data, &inStream); - if (decodeFirstFrame(&data, NULL, NULL, NULL) < 0) - ret = -1; - else - ret = data.totalTime + 0.5; - mp3DecodeDataFinalize(&data); - closeInputStream(&inStream); - - return ret; -} - -static int openMp3FromInputStream(InputStream * inStream, mp3DecodeData * data, - DecoderControl * dc, MpdTag ** tag, - ReplayGainInfo ** replayGainInfo) -{ - initMp3DecodeData(data, inStream); - *tag = NULL; - if (decodeFirstFrame(data, dc, tag, replayGainInfo) < 0) { - mp3DecodeDataFinalize(data); - if (tag && *tag) - freeMpdTag(*tag); - return -1; - } - - return 0; -} - -static int mp3Read(mp3DecodeData * data, OutputBuffer * cb, DecoderControl * dc, - ReplayGainInfo ** replayGainInfo) -{ - int samplesPerFrame; - int samplesLeft; - int i; - int ret; - 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); - - if (!data->foundFirstFrame) { - samplesPerFrame = (data->synth).pcm.length; - data->dropFramesAtStart = data->dropSamplesAtStart / samplesPerFrame; - data->dropFramesAtEnd = data->dropSamplesAtEnd / samplesPerFrame; - data->dropSamplesAtStart = data->dropSamplesAtStart % samplesPerFrame; - data->dropSamplesAtEnd = data->dropSamplesAtEnd % samplesPerFrame; - data->foundFirstFrame = 1; - } - - if (data->dropFramesAtStart > 0) { - data->dropFramesAtStart--; - break; - } else if ((data->dropFramesAtEnd > 0) && - (data->currentFrame == (data->maxFrames + 1 - data->dropFramesAtEnd))) { - /* stop decoding, effectively dropping all remaining - * frames */ - return DECODE_BREAK; - } - - if (data->inStream->metaTitle) { - MpdTag *tag = newMpdTag(); - if (data->inStream->metaName) { - addItemToMpdTag(tag, - TAG_ITEM_NAME, - data->inStream->metaName); - } - addItemToMpdTag(tag, TAG_ITEM_TITLE, - data->inStream->metaTitle); - free(data->inStream->metaTitle); - data->inStream->metaTitle = NULL; - copyMpdTagToOutputBuffer(cb, tag); - freeMpdTag(tag); - } - - samplesLeft = (data->synth).pcm.length; - - for (i = 0; i < (data->synth).pcm.length; i++) { - mpd_sint16 *sample; - - samplesLeft--; - - if (!data->decodedFirstFrame && - (i < data->dropSamplesAtStart)) { - continue; - } else if (data->dropSamplesAtEnd && - (data->currentFrame == (data->maxFrames - data->dropFramesAtEnd)) && - (samplesLeft < data->dropSamplesAtEnd)) { - /* stop decoding, effectively dropping - * all remaining samples */ - return DECODE_BREAK; - } - - sample = (mpd_sint16 *) data->outputPtr; - *sample = (mpd_sint16) audio_linear_dither(16, - (data->synth).pcm.samples[0][i], - &(data->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], - &(data->dither)); - data->outputPtr += 2; - } - - if (data->outputPtr >= data->outputBufferEnd) { - ret = sendDataToOutputBuffer(cb, - data->inStream, - dc, - data->inStream->seekable, - data->outputBuffer, - data->outputPtr - data->outputBuffer, - data->elapsedTime, - data->bitRate / 1000, - (replayGainInfo != NULL) ? *replayGainInfo : NULL); - if (ret == OUTPUT_BUFFER_DC_STOP) { - data->flush = 0; - return DECODE_BREAK; - } - - data->outputPtr = data->outputBuffer; - - if (ret == OUTPUT_BUFFER_DC_SEEK) - break; - } - } - - data->decodedFirstFrame = 1; - - if (dc->seek && data->inStream->seekable) { - long j = 0; - data->muteFrame = MUTEFRAME_SEEK; - while (j < data->highestFrame && dc->seekWhere > - ((float)mad_timer_count(data->times[j], - MAD_UNITS_MILLISECONDS)) - / 1000) { - j++; - } - if (j < data->highestFrame) { - if (seekMp3InputBuffer(data, - data->frameOffset[j]) == - 0) { - data->outputPtr = data->outputBuffer; - clearOutputBuffer(cb); - data->currentFrame = j; - } 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, NULL, - replayGainInfo)) == DECODE_CONT - && !dc->stop) ; - 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; -} - -static void initAudioFormatFromMp3DecodeData(mp3DecodeData * data, - AudioFormat * af) -{ - af->bits = 16; - af->sampleRate = (data->frame).header.samplerate; - af->channels = MAD_NCHANNELS(&(data->frame).header); -} - -static int mp3_decode(OutputBuffer * cb, DecoderControl * dc, - InputStream * inStream) -{ - mp3DecodeData data; - MpdTag *tag = NULL; - ReplayGainInfo *replayGainInfo = NULL; - - if (openMp3FromInputStream(inStream, &data, dc, &tag, &replayGainInfo) < - 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; - - if (inStream->metaTitle) { - if (tag) - freeMpdTag(tag); - tag = newMpdTag(); - addItemToMpdTag(tag, TAG_ITEM_TITLE, inStream->metaTitle); - free(inStream->metaTitle); - inStream->metaTitle = NULL; - if (inStream->metaName) { - addItemToMpdTag(tag, TAG_ITEM_NAME, inStream->metaName); - } - copyMpdTagToOutputBuffer(cb, tag); - freeMpdTag(tag); - } else if (tag) { - if (inStream->metaName) { - clearItemsFromMpdTag(tag, TAG_ITEM_NAME); - addItemToMpdTag(tag, TAG_ITEM_NAME, inStream->metaName); - } - copyMpdTagToOutputBuffer(cb, tag); - freeMpdTag(tag); - } else if (inStream->metaName) { - tag = newMpdTag(); - if (inStream->metaName) { - addItemToMpdTag(tag, TAG_ITEM_NAME, inStream->metaName); - } - copyMpdTagToOutputBuffer(cb, tag); - freeMpdTag(tag); - } - - dc->state = DECODE_STATE_DECODE; - - while (mp3Read(&data, cb, dc, &replayGainInfo) != DECODE_BREAK) ; - /* send last little bit if not dc->stop */ - if (!dc->stop && data.outputPtr != data.outputBuffer && data.flush) { - sendDataToOutputBuffer(cb, NULL, dc, - data.inStream->seekable, - data.outputBuffer, - data.outputPtr - data.outputBuffer, - data.elapsedTime, data.bitRate / 1000, - replayGainInfo); - } - - if (replayGainInfo) - freeReplayGainInfo(replayGainInfo); - - closeInputStream(inStream); - - if (dc->seek && data.muteFrame == MUTEFRAME_SEEK) { - clearOutputBuffer(cb); - dc->seek = 0; - } - - flushOutputBuffer(cb); - mp3DecodeDataFinalize(&data); - - if (dc->stop) { - dc->state = DECODE_STATE_STOP; - dc->stop = 0; - } else - dc->state = DECODE_STATE_STOP; - - return 0; -} - -static MpdTag *mp3_tagDup(char *file) -{ - MpdTag *ret = NULL; - int time; - - ret = id3Dup(file); - - time = getMp3TotalTime(file); - - if (time >= 0) { - if (!ret) - ret = newMpdTag(); - ret->time = time; - } else { - DEBUG("mp3_tagDup: Failed to get total song time from: %s\n", - file); - } - - return ret; -} - -static char *mp3_suffixes[] = { "mp3", "mp2", NULL }; -static char *mp3_mimeTypes[] = { "audio/mpeg", NULL }; - -InputPlugin mp3Plugin = { - "mp3", - mp3_plugin_init, - NULL, - NULL, - mp3_decode, - NULL, - mp3_tagDup, - INPUT_PLUGIN_STREAM_FILE | INPUT_PLUGIN_STREAM_URL, - mp3_suffixes, - mp3_mimeTypes -}; -#else - -InputPlugin mp3Plugin; - -#endif /* HAVE_MAD */ |