mirror of
https://github.com/pineappleEA/pineapple-src.git
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486 lines
17 KiB
C
Executable File
486 lines
17 KiB
C
Executable File
/*
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* Monkey's Audio APE demuxer
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* Copyright (c) 2007 Benjamin Zores <ben@geexbox.org>
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* based upon libdemac from Dave Chapman.
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <stdio.h>
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#include "libavutil/intreadwrite.h"
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#include "avformat.h"
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#include "internal.h"
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#include "apetag.h"
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/* The earliest and latest file formats supported by this library */
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#define APE_MIN_VERSION 3800
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#define APE_MAX_VERSION 3990
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#define MAC_FORMAT_FLAG_8_BIT 1 // is 8-bit [OBSOLETE]
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#define MAC_FORMAT_FLAG_CRC 2 // uses the new CRC32 error detection [OBSOLETE]
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#define MAC_FORMAT_FLAG_HAS_PEAK_LEVEL 4 // uint32 nPeakLevel after the header [OBSOLETE]
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#define MAC_FORMAT_FLAG_24_BIT 8 // is 24-bit [OBSOLETE]
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#define MAC_FORMAT_FLAG_HAS_SEEK_ELEMENTS 16 // has the number of seek elements after the peak level
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#define MAC_FORMAT_FLAG_CREATE_WAV_HEADER 32 // create the wave header on decompression (not stored)
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#define APE_EXTRADATA_SIZE 6
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typedef struct APEFrame {
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int64_t pos;
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int nblocks;
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int size;
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int skip;
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int64_t pts;
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} APEFrame;
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typedef struct APEContext {
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/* Derived fields */
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uint32_t junklength;
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uint32_t firstframe;
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uint32_t totalsamples;
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int currentframe;
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APEFrame *frames;
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/* Info from Descriptor Block */
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int16_t fileversion;
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int16_t padding1;
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uint32_t descriptorlength;
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uint32_t headerlength;
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uint32_t seektablelength;
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uint32_t wavheaderlength;
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uint32_t audiodatalength;
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uint32_t audiodatalength_high;
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uint32_t wavtaillength;
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uint8_t md5[16];
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/* Info from Header Block */
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uint16_t compressiontype;
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uint16_t formatflags;
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uint32_t blocksperframe;
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uint32_t finalframeblocks;
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uint32_t totalframes;
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uint16_t bps;
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uint16_t channels;
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uint32_t samplerate;
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/* Seektable */
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uint32_t *seektable;
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uint8_t *bittable;
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} APEContext;
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static int ape_read_close(AVFormatContext * s);
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static int ape_probe(const AVProbeData * p)
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{
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int version = AV_RL16(p->buf+4);
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if (AV_RL32(p->buf) != MKTAG('M', 'A', 'C', ' '))
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return 0;
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if (version < APE_MIN_VERSION || version > APE_MAX_VERSION)
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return AVPROBE_SCORE_MAX/4;
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return AVPROBE_SCORE_MAX;
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}
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static void ape_dumpinfo(AVFormatContext * s, APEContext * ape_ctx)
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{
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#ifdef DEBUG
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int i;
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av_log(s, AV_LOG_DEBUG, "Descriptor Block:\n\n");
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av_log(s, AV_LOG_DEBUG, "fileversion = %"PRId16"\n", ape_ctx->fileversion);
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av_log(s, AV_LOG_DEBUG, "descriptorlength = %"PRIu32"\n", ape_ctx->descriptorlength);
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av_log(s, AV_LOG_DEBUG, "headerlength = %"PRIu32"\n", ape_ctx->headerlength);
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av_log(s, AV_LOG_DEBUG, "seektablelength = %"PRIu32"\n", ape_ctx->seektablelength);
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av_log(s, AV_LOG_DEBUG, "wavheaderlength = %"PRIu32"\n", ape_ctx->wavheaderlength);
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av_log(s, AV_LOG_DEBUG, "audiodatalength = %"PRIu32"\n", ape_ctx->audiodatalength);
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av_log(s, AV_LOG_DEBUG, "audiodatalength_high = %"PRIu32"\n", ape_ctx->audiodatalength_high);
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av_log(s, AV_LOG_DEBUG, "wavtaillength = %"PRIu32"\n", ape_ctx->wavtaillength);
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av_log(s, AV_LOG_DEBUG, "md5 = ");
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for (i = 0; i < 16; i++)
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av_log(s, AV_LOG_DEBUG, "%02x", ape_ctx->md5[i]);
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av_log(s, AV_LOG_DEBUG, "\n");
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av_log(s, AV_LOG_DEBUG, "\nHeader Block:\n\n");
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av_log(s, AV_LOG_DEBUG, "compressiontype = %"PRIu16"\n", ape_ctx->compressiontype);
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av_log(s, AV_LOG_DEBUG, "formatflags = %"PRIu16"\n", ape_ctx->formatflags);
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av_log(s, AV_LOG_DEBUG, "blocksperframe = %"PRIu32"\n", ape_ctx->blocksperframe);
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av_log(s, AV_LOG_DEBUG, "finalframeblocks = %"PRIu32"\n", ape_ctx->finalframeblocks);
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av_log(s, AV_LOG_DEBUG, "totalframes = %"PRIu32"\n", ape_ctx->totalframes);
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av_log(s, AV_LOG_DEBUG, "bps = %"PRIu16"\n", ape_ctx->bps);
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av_log(s, AV_LOG_DEBUG, "channels = %"PRIu16"\n", ape_ctx->channels);
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av_log(s, AV_LOG_DEBUG, "samplerate = %"PRIu32"\n", ape_ctx->samplerate);
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av_log(s, AV_LOG_DEBUG, "\nSeektable\n\n");
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if ((ape_ctx->seektablelength / sizeof(uint32_t)) != ape_ctx->totalframes) {
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av_log(s, AV_LOG_DEBUG, "No seektable\n");
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} else {
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for (i = 0; i < ape_ctx->seektablelength / sizeof(uint32_t); i++) {
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if (i < ape_ctx->totalframes - 1) {
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av_log(s, AV_LOG_DEBUG, "%8d %"PRIu32" (%"PRIu32" bytes)",
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i, ape_ctx->seektable[i],
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ape_ctx->seektable[i + 1] - ape_ctx->seektable[i]);
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if (ape_ctx->bittable)
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av_log(s, AV_LOG_DEBUG, " + %2d bits\n",
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ape_ctx->bittable[i]);
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av_log(s, AV_LOG_DEBUG, "\n");
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} else {
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av_log(s, AV_LOG_DEBUG, "%8d %"PRIu32"\n", i, ape_ctx->seektable[i]);
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}
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}
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}
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av_log(s, AV_LOG_DEBUG, "\nFrames\n\n");
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for (i = 0; i < ape_ctx->totalframes; i++)
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av_log(s, AV_LOG_DEBUG, "%8d %8"PRId64" %8d (%d samples)\n", i,
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ape_ctx->frames[i].pos, ape_ctx->frames[i].size,
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ape_ctx->frames[i].nblocks);
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av_log(s, AV_LOG_DEBUG, "\nCalculated information:\n\n");
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av_log(s, AV_LOG_DEBUG, "junklength = %"PRIu32"\n", ape_ctx->junklength);
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av_log(s, AV_LOG_DEBUG, "firstframe = %"PRIu32"\n", ape_ctx->firstframe);
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av_log(s, AV_LOG_DEBUG, "totalsamples = %"PRIu32"\n", ape_ctx->totalsamples);
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#endif
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}
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static int ape_read_header(AVFormatContext * s)
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{
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AVIOContext *pb = s->pb;
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APEContext *ape = s->priv_data;
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AVStream *st;
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uint32_t tag;
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int i, ret;
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int total_blocks, final_size = 0;
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int64_t pts, file_size;
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/* Skip any leading junk such as id3v2 tags */
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ape->junklength = avio_tell(pb);
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tag = avio_rl32(pb);
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if (tag != MKTAG('M', 'A', 'C', ' '))
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return AVERROR_INVALIDDATA;
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ape->fileversion = avio_rl16(pb);
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if (ape->fileversion < APE_MIN_VERSION || ape->fileversion > APE_MAX_VERSION) {
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av_log(s, AV_LOG_ERROR, "Unsupported file version - %d.%02d\n",
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ape->fileversion / 1000, (ape->fileversion % 1000) / 10);
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return AVERROR_PATCHWELCOME;
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}
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if (ape->fileversion >= 3980) {
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ape->padding1 = avio_rl16(pb);
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ape->descriptorlength = avio_rl32(pb);
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ape->headerlength = avio_rl32(pb);
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ape->seektablelength = avio_rl32(pb);
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ape->wavheaderlength = avio_rl32(pb);
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ape->audiodatalength = avio_rl32(pb);
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ape->audiodatalength_high = avio_rl32(pb);
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ape->wavtaillength = avio_rl32(pb);
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avio_read(pb, ape->md5, 16);
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/* Skip any unknown bytes at the end of the descriptor.
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This is for future compatibility */
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if (ape->descriptorlength > 52)
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avio_skip(pb, ape->descriptorlength - 52);
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/* Read header data */
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ape->compressiontype = avio_rl16(pb);
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ape->formatflags = avio_rl16(pb);
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ape->blocksperframe = avio_rl32(pb);
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ape->finalframeblocks = avio_rl32(pb);
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ape->totalframes = avio_rl32(pb);
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ape->bps = avio_rl16(pb);
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ape->channels = avio_rl16(pb);
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ape->samplerate = avio_rl32(pb);
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} else {
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ape->descriptorlength = 0;
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ape->headerlength = 32;
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ape->compressiontype = avio_rl16(pb);
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ape->formatflags = avio_rl16(pb);
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ape->channels = avio_rl16(pb);
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ape->samplerate = avio_rl32(pb);
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ape->wavheaderlength = avio_rl32(pb);
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ape->wavtaillength = avio_rl32(pb);
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ape->totalframes = avio_rl32(pb);
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ape->finalframeblocks = avio_rl32(pb);
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if (ape->formatflags & MAC_FORMAT_FLAG_HAS_PEAK_LEVEL) {
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avio_skip(pb, 4); /* Skip the peak level */
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ape->headerlength += 4;
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}
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if (ape->formatflags & MAC_FORMAT_FLAG_HAS_SEEK_ELEMENTS) {
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ape->seektablelength = avio_rl32(pb);
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ape->headerlength += 4;
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ape->seektablelength *= sizeof(int32_t);
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} else
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ape->seektablelength = ape->totalframes * sizeof(int32_t);
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if (ape->formatflags & MAC_FORMAT_FLAG_8_BIT)
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ape->bps = 8;
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else if (ape->formatflags & MAC_FORMAT_FLAG_24_BIT)
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ape->bps = 24;
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else
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ape->bps = 16;
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if (ape->fileversion >= 3950)
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ape->blocksperframe = 73728 * 4;
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else if (ape->fileversion >= 3900 || (ape->fileversion >= 3800 && ape->compressiontype >= 4000))
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ape->blocksperframe = 73728;
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else
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ape->blocksperframe = 9216;
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/* Skip any stored wav header */
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if (!(ape->formatflags & MAC_FORMAT_FLAG_CREATE_WAV_HEADER))
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avio_skip(pb, ape->wavheaderlength);
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}
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if(!ape->totalframes){
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av_log(s, AV_LOG_ERROR, "No frames in the file!\n");
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return AVERROR(EINVAL);
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}
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if(ape->totalframes > UINT_MAX / sizeof(APEFrame)){
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av_log(s, AV_LOG_ERROR, "Too many frames: %"PRIu32"\n",
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ape->totalframes);
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return AVERROR_INVALIDDATA;
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}
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if (ape->seektablelength / sizeof(*ape->seektable) < ape->totalframes) {
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av_log(s, AV_LOG_ERROR,
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"Number of seek entries is less than number of frames: %"SIZE_SPECIFIER" vs. %"PRIu32"\n",
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ape->seektablelength / sizeof(*ape->seektable), ape->totalframes);
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return AVERROR_INVALIDDATA;
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}
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ape->frames = av_malloc_array(ape->totalframes, sizeof(APEFrame));
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if(!ape->frames)
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return AVERROR(ENOMEM);
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ape->firstframe = ape->junklength + ape->descriptorlength + ape->headerlength + ape->seektablelength + ape->wavheaderlength;
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if (ape->fileversion < 3810)
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ape->firstframe += ape->totalframes;
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ape->currentframe = 0;
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ape->totalsamples = ape->finalframeblocks;
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if (ape->totalframes > 1)
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ape->totalsamples += ape->blocksperframe * (ape->totalframes - 1);
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if (ape->seektablelength > 0) {
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ape->seektable = av_mallocz(ape->seektablelength);
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if (!ape->seektable) {
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ret = AVERROR(ENOMEM);
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goto fail;
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}
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for (i = 0; i < ape->seektablelength / sizeof(uint32_t) && !pb->eof_reached; i++)
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ape->seektable[i] = avio_rl32(pb);
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if (ape->fileversion < 3810) {
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ape->bittable = av_mallocz(ape->totalframes);
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if (!ape->bittable) {
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ret = AVERROR(ENOMEM);
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goto fail;
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}
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for (i = 0; i < ape->totalframes && !pb->eof_reached; i++)
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ape->bittable[i] = avio_r8(pb);
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}
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if (pb->eof_reached)
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av_log(s, AV_LOG_WARNING, "File truncated\n");
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}
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ape->frames[0].pos = ape->firstframe;
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ape->frames[0].nblocks = ape->blocksperframe;
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ape->frames[0].skip = 0;
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for (i = 1; i < ape->totalframes; i++) {
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ape->frames[i].pos = ape->seektable[i] + ape->junklength;
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ape->frames[i].nblocks = ape->blocksperframe;
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ape->frames[i - 1].size = ape->frames[i].pos - ape->frames[i - 1].pos;
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ape->frames[i].skip = (ape->frames[i].pos - ape->frames[0].pos) & 3;
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}
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ape->frames[ape->totalframes - 1].nblocks = ape->finalframeblocks;
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/* calculate final packet size from total file size, if available */
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file_size = avio_size(pb);
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if (file_size > 0) {
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final_size = file_size - ape->frames[ape->totalframes - 1].pos -
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ape->wavtaillength;
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final_size -= final_size & 3;
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}
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if (file_size <= 0 || final_size <= 0)
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final_size = ape->finalframeblocks * 8;
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ape->frames[ape->totalframes - 1].size = final_size;
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for (i = 0; i < ape->totalframes; i++) {
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if(ape->frames[i].skip){
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ape->frames[i].pos -= ape->frames[i].skip;
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ape->frames[i].size += ape->frames[i].skip;
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}
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ape->frames[i].size = (ape->frames[i].size + 3) & ~3;
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}
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if (ape->fileversion < 3810) {
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for (i = 0; i < ape->totalframes; i++) {
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if (i < ape->totalframes - 1 && ape->bittable[i + 1])
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ape->frames[i].size += 4;
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ape->frames[i].skip <<= 3;
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ape->frames[i].skip += ape->bittable[i];
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}
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}
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ape_dumpinfo(s, ape);
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av_log(s, AV_LOG_VERBOSE, "Decoding file - v%d.%02d, compression level %"PRIu16"\n",
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ape->fileversion / 1000, (ape->fileversion % 1000) / 10,
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ape->compressiontype);
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/* now we are ready: build format streams */
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st = avformat_new_stream(s, NULL);
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if (!st) {
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ret = AVERROR(ENOMEM);
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goto fail;
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}
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total_blocks = (ape->totalframes == 0) ? 0 : ((ape->totalframes - 1) * ape->blocksperframe) + ape->finalframeblocks;
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st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
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st->codecpar->codec_id = AV_CODEC_ID_APE;
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st->codecpar->codec_tag = MKTAG('A', 'P', 'E', ' ');
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st->codecpar->channels = ape->channels;
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st->codecpar->sample_rate = ape->samplerate;
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st->codecpar->bits_per_coded_sample = ape->bps;
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st->nb_frames = ape->totalframes;
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st->start_time = 0;
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st->duration = total_blocks;
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avpriv_set_pts_info(st, 64, 1, ape->samplerate);
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if ((ret = ff_alloc_extradata(st->codecpar, APE_EXTRADATA_SIZE)) < 0)
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goto fail;
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AV_WL16(st->codecpar->extradata + 0, ape->fileversion);
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AV_WL16(st->codecpar->extradata + 2, ape->compressiontype);
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AV_WL16(st->codecpar->extradata + 4, ape->formatflags);
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pts = 0;
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for (i = 0; i < ape->totalframes; i++) {
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ape->frames[i].pts = pts;
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av_add_index_entry(st, ape->frames[i].pos, ape->frames[i].pts, 0, 0, AVINDEX_KEYFRAME);
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pts += ape->blocksperframe;
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}
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/* try to read APE tags */
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if (pb->seekable & AVIO_SEEKABLE_NORMAL) {
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ff_ape_parse_tag(s);
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avio_seek(pb, 0, SEEK_SET);
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}
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return 0;
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fail:
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ape_read_close(s);
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return ret;
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}
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static int ape_read_packet(AVFormatContext * s, AVPacket * pkt)
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{
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int ret;
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int nblocks;
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APEContext *ape = s->priv_data;
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uint32_t extra_size = 8;
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int64_t ret64;
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if (avio_feof(s->pb))
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return AVERROR_EOF;
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if (ape->currentframe >= ape->totalframes)
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return AVERROR_EOF;
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ret64 = avio_seek(s->pb, ape->frames[ape->currentframe].pos, SEEK_SET);
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if (ret64 < 0)
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return ret64;
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/* Calculate how many blocks there are in this frame */
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if (ape->currentframe == (ape->totalframes - 1))
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nblocks = ape->finalframeblocks;
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else
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nblocks = ape->blocksperframe;
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if (ape->frames[ape->currentframe].size <= 0 ||
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ape->frames[ape->currentframe].size > INT_MAX - extra_size) {
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av_log(s, AV_LOG_ERROR, "invalid packet size: %d\n",
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ape->frames[ape->currentframe].size);
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ape->currentframe++;
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return AVERROR(EIO);
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}
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ret = av_new_packet(pkt, ape->frames[ape->currentframe].size + extra_size);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
AV_WL32(pkt->data , nblocks);
|
|
AV_WL32(pkt->data + 4, ape->frames[ape->currentframe].skip);
|
|
ret = avio_read(s->pb, pkt->data + extra_size, ape->frames[ape->currentframe].size);
|
|
if (ret < 0) {
|
|
return ret;
|
|
}
|
|
|
|
pkt->pts = ape->frames[ape->currentframe].pts;
|
|
pkt->stream_index = 0;
|
|
|
|
/* note: we need to modify the packet size here to handle the last
|
|
packet */
|
|
pkt->size = ret + extra_size;
|
|
|
|
ape->currentframe++;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int ape_read_close(AVFormatContext * s)
|
|
{
|
|
APEContext *ape = s->priv_data;
|
|
|
|
av_freep(&ape->frames);
|
|
av_freep(&ape->seektable);
|
|
av_freep(&ape->bittable);
|
|
return 0;
|
|
}
|
|
|
|
static int ape_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
|
|
{
|
|
AVStream *st = s->streams[stream_index];
|
|
APEContext *ape = s->priv_data;
|
|
int index = av_index_search_timestamp(st, timestamp, flags);
|
|
int64_t ret;
|
|
|
|
if (index < 0)
|
|
return -1;
|
|
|
|
if ((ret = avio_seek(s->pb, st->index_entries[index].pos, SEEK_SET)) < 0)
|
|
return ret;
|
|
ape->currentframe = index;
|
|
return 0;
|
|
}
|
|
|
|
AVInputFormat ff_ape_demuxer = {
|
|
.name = "ape",
|
|
.long_name = NULL_IF_CONFIG_SMALL("Monkey's Audio"),
|
|
.priv_data_size = sizeof(APEContext),
|
|
.read_probe = ape_probe,
|
|
.read_header = ape_read_header,
|
|
.read_packet = ape_read_packet,
|
|
.read_close = ape_read_close,
|
|
.read_seek = ape_read_seek,
|
|
.extensions = "ape,apl,mac",
|
|
};
|