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FFmpeg/libavformat/ape.c
Andreas Rheinhardt 790f793844 avutil/common: Don't auto-include mem.h 
There are lots of files that don't need it: The number of object
files that actually need it went down from 2011 to 884 here.

Keep it for external users in order to not cause breakages.

Also improve the other headers a bit while just at it.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
2024-03-31 00:08:43 +01:00

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