[deb_ffmpeg.git] / ffmpeg / libavformat / ape.c

/*
 * 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 "avformat.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 {
    int64_t pos;
    int nblocks;
    int size;
    int skip;
    int64_t pts;
} APEFrame;

typedef struct {
    /* Derived fields */
    uint32_t junklength;
    uint32_t firstframe;
    uint32_t totalsamples;
    int currentframe;
    APEFrame *frames;

    /* Info from Descriptor Block */
    char magic[4];
    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;

    /* Seektable */
    uint32_t *seektable;
    uint8_t  *bittable;
} APEContext;

static int ape_probe(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, "magic                = \"%c%c%c%c\"\n", ape_ctx->magic[0], ape_ctx->magic[1], ape_ctx->magic[2], ape_ctx->magic[3]);
    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");
    } else {
        for (i = 0; i < ape_ctx->seektablelength / sizeof(uint32_t); i++) {
            if (i < ape_ctx->totalframes - 1) {
                av_log(s, AV_LOG_DEBUG, "%8d   %"PRIu32" (%"PRIu32" bytes)",
                       i, ape_ctx->seektable[i],
                       ape_ctx->seektable[i + 1] - ape_ctx->seektable[i]);
                if (ape_ctx->bittable)
                    av_log(s, AV_LOG_DEBUG, " + %2d bits\n",
                           ape_ctx->bittable[i]);
                av_log(s, AV_LOG_DEBUG, "\n");
            } else {
                av_log(s, AV_LOG_DEBUG, "%8d   %"PRIu32"\n", i, ape_ctx->seektable[i]);
            }
        }
    }

    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" %8d (%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;
    int total_blocks, 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){
        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(*ape->seektable) < 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(*ape->seektable), ape->totalframes);
        return AVERROR_INVALIDDATA;
    }
    ape->frames       = av_malloc(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);

    if (ape->seektablelength > 0) {
        ape->seektable = av_mallocz(ape->seektablelength);
        if (!ape->seektable)
            return AVERROR(ENOMEM);
        for (i = 0; i < ape->seektablelength / sizeof(uint32_t) && !pb->eof_reached; i++)
            ape->seektable[i] = avio_rl32(pb);
        if (ape->fileversion < 3810) {
            ape->bittable = av_mallocz(ape->totalframes);
            if (!ape->bittable)
                return AVERROR(ENOMEM);
            for (i = 0; i < ape->totalframes && !pb->eof_reached; i++)
                ape->bittable[i] = avio_r8(pb);
        }
        if (pb->eof_reached)
            av_log(s, AV_LOG_WARNING, "File truncated\n");
    }

    ape->frames[0].pos     = ape->firstframe;
    ape->frames[0].nblocks = ape->blocksperframe;
    ape->frames[0].skip    = 0;
    for (i = 1; i < ape->totalframes; i++) {
        ape->frames[i].pos      = ape->seektable[i] + 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;
    }
    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;
        }
        ape->frames[i].size = (ape->frames[i].size + 3) & ~3;
    }
    if (ape->fileversion < 3810) {
        for (i = 0; i < ape->totalframes; i++) {
            if (i < ape->totalframes - 1 && ape->bittable[i + 1])
                ape->frames[i].size += 4;
            ape->frames[i].skip <<= 3;
            ape->frames[i].skip  += ape->bittable[i];
        }
    }

    ape_dumpinfo(s, ape);

    av_log(s, AV_LOG_DEBUG, "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 : ((ape->totalframes - 1) * ape->blocksperframe) + ape->finalframeblocks;

    st->codec->codec_type      = AVMEDIA_TYPE_AUDIO;
    st->codec->codec_id        = AV_CODEC_ID_APE;
    st->codec->codec_tag       = MKTAG('A', 'P', 'E', ' ');
    st->codec->channels        = ape->channels;
    st->codec->sample_rate     = ape->samplerate;
    st->codec->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 (ff_alloc_extradata(st->codec, APE_EXTRADATA_SIZE))
        return AVERROR(ENOMEM);
    AV_WL16(st->codec->extradata + 0, ape->fileversion);
    AV_WL16(st->codec->extradata + 2, ape->compressiontype);
    AV_WL16(st->codec->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) {
        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;

    if (avio_feof(s->pb))
        return AVERROR_EOF;
    if (ape->currentframe >= ape->totalframes)
        return AVERROR_EOF;

    if (avio_seek(s->pb, ape->frames[ape->currentframe].pos, SEEK_SET) < 0)
        return AVERROR(EIO);

    /* 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: %d\n",
               ape->frames[ape->currentframe].size);
        ape->currentframe++;
        return AVERROR(EIO);
    }

    if (av_new_packet(pkt,  ape->frames[ape->currentframe].size + extra_size) < 0)
        return AVERROR(ENOMEM);

    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) {
        av_free_packet(pkt);
        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);

    if (index < 0)
        return -1;

    if (avio_seek(s->pb, st->index_entries[index].pos, SEEK_SET) < 0)
        return -1;
    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",
};
Commit	Line	Data
2ba45a60 DM	1	/*
	2	* Monkey's Audio APE demuxer
	3	* Copyright (c) 2007 Benjamin Zores <ben@geexbox.org>
	4	* based upon libdemac from Dave Chapman.
	5	*
	6	* This file is part of FFmpeg.
	7	*
	8	* FFmpeg is free software; you can redistribute it and/or
	9	* modify it under the terms of the GNU Lesser General Public
	10	* License as published by the Free Software Foundation; either
	11	* version 2.1 of the License, or (at your option) any later version.
	12	*
	13	* FFmpeg is distributed in the hope that it will be useful,
	14	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	15	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	16	* Lesser General Public License for more details.
	17	*
	18	* You should have received a copy of the GNU Lesser General Public
	19	* License along with FFmpeg; if not, write to the Free Software
	20	* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
	21	*/
	22
	23	#include <stdio.h>
	24
	25	#include "libavutil/intreadwrite.h"
	26	#include "avformat.h"
	27	#include "internal.h"
	28	#include "apetag.h"
	29
	30	/* The earliest and latest file formats supported by this library */
	31	#define APE_MIN_VERSION 3800
	32	#define APE_MAX_VERSION 3990
	33
	34	#define MAC_FORMAT_FLAG_8_BIT 1 // is 8-bit [OBSOLETE]
	35	#define MAC_FORMAT_FLAG_CRC 2 // uses the new CRC32 error detection [OBSOLETE]
	36	#define MAC_FORMAT_FLAG_HAS_PEAK_LEVEL 4 // uint32 nPeakLevel after the header [OBSOLETE]
	37	#define MAC_FORMAT_FLAG_24_BIT 8 // is 24-bit [OBSOLETE]
	38	#define MAC_FORMAT_FLAG_HAS_SEEK_ELEMENTS 16 // has the number of seek elements after the peak level
	39	#define MAC_FORMAT_FLAG_CREATE_WAV_HEADER 32 // create the wave header on decompression (not stored)
	40
	41	#define APE_EXTRADATA_SIZE 6
	42
	43	typedef struct {
	44	int64_t pos;
	45	int nblocks;
	46	int size;
	47	int skip;
	48	int64_t pts;
	49	} APEFrame;
	50
	51	typedef struct {
	52	/* Derived fields */
	53	uint32_t junklength;
	54	uint32_t firstframe;
	55	uint32_t totalsamples;
	56	int currentframe;
	57	APEFrame *frames;
	58
	59	/* Info from Descriptor Block */
	60	char magic[4];
	61	int16_t fileversion;
	62	int16_t padding1;
	63	uint32_t descriptorlength;
	64	uint32_t headerlength;
65	uint32_t seektablelength;
66	uint32_t wavheaderlength;
67	uint32_t audiodatalength;
68	uint32_t audiodatalength_high;
69	uint32_t wavtaillength;
70	uint8_t md5[16];
71
72	/* Info from Header Block */
73	uint16_t compressiontype;
74	uint16_t formatflags;
75	uint32_t blocksperframe;
76	uint32_t finalframeblocks;
77	uint32_t totalframes;
78	uint16_t bps;
79	uint16_t channels;
80	uint32_t samplerate;
81
82	/* Seektable */
83	uint32_t *seektable;
84	uint8_t *bittable;
85	} APEContext;
86
87	static int ape_probe(AVProbeData * p)
88	{
89	int version = AV_RL16(p->buf+4);
90	if (AV_RL32(p->buf) != MKTAG('M', 'A', 'C', ' '))
91	return 0;
92
93	if (version < APE_MIN_VERSION \|\| version > APE_MAX_VERSION)
94	return AVPROBE_SCORE_MAX/4;
95
96	return AVPROBE_SCORE_MAX;
97	}
98
99	static void ape_dumpinfo(AVFormatContext * s, APEContext * ape_ctx)
100	{
101	#ifdef DEBUG
102	int i;
103
104	av_log(s, AV_LOG_DEBUG, "Descriptor Block:\n\n");
105	av_log(s, AV_LOG_DEBUG, "magic = \"%c%c%c%c\"\n", ape_ctx->magic[0], ape_ctx->magic[1], ape_ctx->magic[2], ape_ctx->magic[3]);
106	av_log(s, AV_LOG_DEBUG, "fileversion = %"PRId16"\n", ape_ctx->fileversion);
107	av_log(s, AV_LOG_DEBUG, "descriptorlength = %"PRIu32"\n", ape_ctx->descriptorlength);
108	av_log(s, AV_LOG_DEBUG, "headerlength = %"PRIu32"\n", ape_ctx->headerlength);
109	av_log(s, AV_LOG_DEBUG, "seektablelength = %"PRIu32"\n", ape_ctx->seektablelength);
110	av_log(s, AV_LOG_DEBUG, "wavheaderlength = %"PRIu32"\n", ape_ctx->wavheaderlength);
111	av_log(s, AV_LOG_DEBUG, "audiodatalength = %"PRIu32"\n", ape_ctx->audiodatalength);
112	av_log(s, AV_LOG_DEBUG, "audiodatalength_high = %"PRIu32"\n", ape_ctx->audiodatalength_high);
113	av_log(s, AV_LOG_DEBUG, "wavtaillength = %"PRIu32"\n", ape_ctx->wavtaillength);
114	av_log(s, AV_LOG_DEBUG, "md5 = ");
115	for (i = 0; i < 16; i++)
116	av_log(s, AV_LOG_DEBUG, "%02x", ape_ctx->md5[i]);
117	av_log(s, AV_LOG_DEBUG, "\n");
118
119	av_log(s, AV_LOG_DEBUG, "\nHeader Block:\n\n");
120
121	av_log(s, AV_LOG_DEBUG, "compressiontype = %"PRIu16"\n", ape_ctx->compressiontype);
122	av_log(s, AV_LOG_DEBUG, "formatflags = %"PRIu16"\n", ape_ctx->formatflags);
123	av_log(s, AV_LOG_DEBUG, "blocksperframe = %"PRIu32"\n", ape_ctx->blocksperframe);
124	av_log(s, AV_LOG_DEBUG, "finalframeblocks = %"PRIu32"\n", ape_ctx->finalframeblocks);
125	av_log(s, AV_LOG_DEBUG, "totalframes = %"PRIu32"\n", ape_ctx->totalframes);
126	av_log(s, AV_LOG_DEBUG, "bps = %"PRIu16"\n", ape_ctx->bps);
127	av_log(s, AV_LOG_DEBUG, "channels = %"PRIu16"\n", ape_ctx->channels);
128	av_log(s, AV_LOG_DEBUG, "samplerate = %"PRIu32"\n", ape_ctx->samplerate);
129
130	av_log(s, AV_LOG_DEBUG, "\nSeektable\n\n");
131	if ((ape_ctx->seektablelength / sizeof(uint32_t)) != ape_ctx->totalframes) {
132	av_log(s, AV_LOG_DEBUG, "No seektable\n");
133	} else {
134	for (i = 0; i < ape_ctx->seektablelength / sizeof(uint32_t); i++) {
135	if (i < ape_ctx->totalframes - 1) {
136	av_log(s, AV_LOG_DEBUG, "%8d %"PRIu32" (%"PRIu32" bytes)",
137	i, ape_ctx->seektable[i],
138	ape_ctx->seektable[i + 1] - ape_ctx->seektable[i]);
139	if (ape_ctx->bittable)
140	av_log(s, AV_LOG_DEBUG, " + %2d bits\n",
141	ape_ctx->bittable[i]);
142	av_log(s, AV_LOG_DEBUG, "\n");
143	} else {
144	av_log(s, AV_LOG_DEBUG, "%8d %"PRIu32"\n", i, ape_ctx->seektable[i]);
145	}
146	}
147	}
148
149	av_log(s, AV_LOG_DEBUG, "\nFrames\n\n");
150	for (i = 0; i < ape_ctx->totalframes; i++)
151	av_log(s, AV_LOG_DEBUG, "%8d %8"PRId64" %8d (%d samples)\n", i,
152	ape_ctx->frames[i].pos, ape_ctx->frames[i].size,
153	ape_ctx->frames[i].nblocks);
154
155	av_log(s, AV_LOG_DEBUG, "\nCalculated information:\n\n");
156	av_log(s, AV_LOG_DEBUG, "junklength = %"PRIu32"\n", ape_ctx->junklength);
157	av_log(s, AV_LOG_DEBUG, "firstframe = %"PRIu32"\n", ape_ctx->firstframe);
158	av_log(s, AV_LOG_DEBUG, "totalsamples = %"PRIu32"\n", ape_ctx->totalsamples);
159	#endif
160	}
161
162	static int ape_read_header(AVFormatContext * s)
163	{
164	AVIOContext *pb = s->pb;
165	APEContext *ape = s->priv_data;
166	AVStream *st;
167	uint32_t tag;
168	int i;
169	int total_blocks, final_size = 0;
170	int64_t pts, file_size;
171
172	/* Skip any leading junk such as id3v2 tags */
173	ape->junklength = avio_tell(pb);
174
175	tag = avio_rl32(pb);
176	if (tag != MKTAG('M', 'A', 'C', ' '))
177	return AVERROR_INVALIDDATA;
178
179	ape->fileversion = avio_rl16(pb);
180
181	if (ape->fileversion < APE_MIN_VERSION \|\| ape->fileversion > APE_MAX_VERSION) {
182	av_log(s, AV_LOG_ERROR, "Unsupported file version - %d.%02d\n",
183	ape->fileversion / 1000, (ape->fileversion % 1000) / 10);
184	return AVERROR_PATCHWELCOME;
185	}
186
187	if (ape->fileversion >= 3980) {
188	ape->padding1 = avio_rl16(pb);
189	ape->descriptorlength = avio_rl32(pb);
190	ape->headerlength = avio_rl32(pb);
191	ape->seektablelength = avio_rl32(pb);
192	ape->wavheaderlength = avio_rl32(pb);
193	ape->audiodatalength = avio_rl32(pb);
194	ape->audiodatalength_high = avio_rl32(pb);
195	ape->wavtaillength = avio_rl32(pb);
196	avio_read(pb, ape->md5, 16);
197
198	/* Skip any unknown bytes at the end of the descriptor.
199	This is for future compatibility */
200	if (ape->descriptorlength > 52)
201	avio_skip(pb, ape->descriptorlength - 52);
202
203	/* Read header data */
204	ape->compressiontype = avio_rl16(pb);
205	ape->formatflags = avio_rl16(pb);
206	ape->blocksperframe = avio_rl32(pb);
207	ape->finalframeblocks = avio_rl32(pb);
208	ape->totalframes = avio_rl32(pb);
209	ape->bps = avio_rl16(pb);
210	ape->channels = avio_rl16(pb);
211	ape->samplerate = avio_rl32(pb);
212	} else {
213	ape->descriptorlength = 0;
214	ape->headerlength = 32;
215
216	ape->compressiontype = avio_rl16(pb);
217	ape->formatflags = avio_rl16(pb);
218	ape->channels = avio_rl16(pb);
219	ape->samplerate = avio_rl32(pb);
220	ape->wavheaderlength = avio_rl32(pb);
221	ape->wavtaillength = avio_rl32(pb);
222	ape->totalframes = avio_rl32(pb);
223	ape->finalframeblocks = avio_rl32(pb);
224
225	if (ape->formatflags & MAC_FORMAT_FLAG_HAS_PEAK_LEVEL) {
226	avio_skip(pb, 4); /* Skip the peak level */
227	ape->headerlength += 4;
228	}
229
230	if (ape->formatflags & MAC_FORMAT_FLAG_HAS_SEEK_ELEMENTS) {
231	ape->seektablelength = avio_rl32(pb);
232	ape->headerlength += 4;
233	ape->seektablelength *= sizeof(int32_t);
234	} else
235	ape->seektablelength = ape->totalframes * sizeof(int32_t);
236
237	if (ape->formatflags & MAC_FORMAT_FLAG_8_BIT)
238	ape->bps = 8;
239	else if (ape->formatflags & MAC_FORMAT_FLAG_24_BIT)
240	ape->bps = 24;
241	else
242	ape->bps = 16;
243
244	if (ape->fileversion >= 3950)
245	ape->blocksperframe = 73728 * 4;
246	else if (ape->fileversion >= 3900 \|\| (ape->fileversion >= 3800 && ape->compressiontype >= 4000))
247	ape->blocksperframe = 73728;
248	else
249	ape->blocksperframe = 9216;
250
251	/* Skip any stored wav header */
252	if (!(ape->formatflags & MAC_FORMAT_FLAG_CREATE_WAV_HEADER))
253	avio_skip(pb, ape->wavheaderlength);
254	}
255
256	if(!ape->totalframes){
257	av_log(s, AV_LOG_ERROR, "No frames in the file!\n");
258	return AVERROR(EINVAL);
259	}
260	if(ape->totalframes > UINT_MAX / sizeof(APEFrame)){
261	av_log(s, AV_LOG_ERROR, "Too many frames: %"PRIu32"\n",
262	ape->totalframes);
263	return AVERROR_INVALIDDATA;
264	}
265	if (ape->seektablelength / sizeof(*ape->seektable) < ape->totalframes) {
266	av_log(s, AV_LOG_ERROR,
267	"Number of seek entries is less than number of frames: %"SIZE_SPECIFIER" vs. %"PRIu32"\n",
268	ape->seektablelength / sizeof(*ape->seektable), ape->totalframes);
269	return AVERROR_INVALIDDATA;
270	}
271	ape->frames = av_malloc(ape->totalframes * sizeof(APEFrame));
272	if(!ape->frames)
273	return AVERROR(ENOMEM);
274	ape->firstframe = ape->junklength + ape->descriptorlength + ape->headerlength + ape->seektablelength + ape->wavheaderlength;
275	if (ape->fileversion < 3810)
276	ape->firstframe += ape->totalframes;
277	ape->currentframe = 0;
278
279
280	ape->totalsamples = ape->finalframeblocks;
281	if (ape->totalframes > 1)
282	ape->totalsamples += ape->blocksperframe * (ape->totalframes - 1);
283
284	if (ape->seektablelength > 0) {
285	ape->seektable = av_mallocz(ape->seektablelength);
286	if (!ape->seektable)
287	return AVERROR(ENOMEM);
288	for (i = 0; i < ape->seektablelength / sizeof(uint32_t) && !pb->eof_reached; i++)
289	ape->seektable[i] = avio_rl32(pb);
290	if (ape->fileversion < 3810) {
291	ape->bittable = av_mallocz(ape->totalframes);
292	if (!ape->bittable)
293	return AVERROR(ENOMEM);
294	for (i = 0; i < ape->totalframes && !pb->eof_reached; i++)
295	ape->bittable[i] = avio_r8(pb);
296	}
297	if (pb->eof_reached)
298	av_log(s, AV_LOG_WARNING, "File truncated\n");
299	}
300
301	ape->frames[0].pos = ape->firstframe;
302	ape->frames[0].nblocks = ape->blocksperframe;
303	ape->frames[0].skip = 0;
304	for (i = 1; i < ape->totalframes; i++) {
305	ape->frames[i].pos = ape->seektable[i] + ape->junklength;
306	ape->frames[i].nblocks = ape->blocksperframe;
307	ape->frames[i - 1].size = ape->frames[i].pos - ape->frames[i - 1].pos;
308	ape->frames[i].skip = (ape->frames[i].pos - ape->frames[0].pos) & 3;
309	}
310	ape->frames[ape->totalframes - 1].nblocks = ape->finalframeblocks;
311	/* calculate final packet size from total file size, if available */
312	file_size = avio_size(pb);
313	if (file_size > 0) {
314	final_size = file_size - ape->frames[ape->totalframes - 1].pos -
315	ape->wavtaillength;
316	final_size -= final_size & 3;
317	}
318	if (file_size <= 0 \|\| final_size <= 0)
319	final_size = ape->finalframeblocks * 8;
320	ape->frames[ape->totalframes - 1].size = final_size;
321
322	for (i = 0; i < ape->totalframes; i++) {
323	if(ape->frames[i].skip){
324	ape->frames[i].pos -= ape->frames[i].skip;
325	ape->frames[i].size += ape->frames[i].skip;
326	}
327	ape->frames[i].size = (ape->frames[i].size + 3) & ~3;
328	}
329	if (ape->fileversion < 3810) {
330	for (i = 0; i < ape->totalframes; i++) {
331	if (i < ape->totalframes - 1 && ape->bittable[i + 1])
332	ape->frames[i].size += 4;
333	ape->frames[i].skip <<= 3;
334	ape->frames[i].skip += ape->bittable[i];
335	}
336	}
337
338	ape_dumpinfo(s, ape);
339
340	av_log(s, AV_LOG_DEBUG, "Decoding file - v%d.%02d, compression level %"PRIu16"\n",
341	ape->fileversion / 1000, (ape->fileversion % 1000) / 10,
342	ape->compressiontype);
343
344	/* now we are ready: build format streams */
345	st = avformat_new_stream(s, NULL);
346	if (!st)
347	return AVERROR(ENOMEM);
348
349	total_blocks = (ape->totalframes == 0) ? 0 : ((ape->totalframes - 1) * ape->blocksperframe) + ape->finalframeblocks;
350
351	st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
352	st->codec->codec_id = AV_CODEC_ID_APE;
353	st->codec->codec_tag = MKTAG('A', 'P', 'E', ' ');
354	st->codec->channels = ape->channels;
355	st->codec->sample_rate = ape->samplerate;
356	st->codec->bits_per_coded_sample = ape->bps;
357
358	st->nb_frames = ape->totalframes;
359	st->start_time = 0;
360	st->duration = total_blocks;
361	avpriv_set_pts_info(st, 64, 1, ape->samplerate);
362
363	if (ff_alloc_extradata(st->codec, APE_EXTRADATA_SIZE))
364	return AVERROR(ENOMEM);
365	AV_WL16(st->codec->extradata + 0, ape->fileversion);
366	AV_WL16(st->codec->extradata + 2, ape->compressiontype);
367	AV_WL16(st->codec->extradata + 4, ape->formatflags);
368
369	pts = 0;
370	for (i = 0; i < ape->totalframes; i++) {
371	ape->frames[i].pts = pts;
372	av_add_index_entry(st, ape->frames[i].pos, ape->frames[i].pts, 0, 0, AVINDEX_KEYFRAME);
373	pts += ape->blocksperframe;
374	}
375
376	/* try to read APE tags */
377	if (pb->seekable) {
378	ff_ape_parse_tag(s);
379	avio_seek(pb, 0, SEEK_SET);
380	}
381
382	return 0;
383	}
384
385	static int ape_read_packet(AVFormatContext * s, AVPacket * pkt)
386	{
387	int ret;
388	int nblocks;
389	APEContext *ape = s->priv_data;
390	uint32_t extra_size = 8;
391
392	if (avio_feof(s->pb))
393	return AVERROR_EOF;
394	if (ape->currentframe >= ape->totalframes)
395	return AVERROR_EOF;
396
397	if (avio_seek(s->pb, ape->frames[ape->currentframe].pos, SEEK_SET) < 0)
398	return AVERROR(EIO);
399
400	/* Calculate how many blocks there are in this frame */
401	if (ape->currentframe == (ape->totalframes - 1))
402	nblocks = ape->finalframeblocks;
403	else
404	nblocks = ape->blocksperframe;
405
406	if (ape->frames[ape->currentframe].size <= 0 \|\|
407	ape->frames[ape->currentframe].size > INT_MAX - extra_size) {
408	av_log(s, AV_LOG_ERROR, "invalid packet size: %d\n",
409	ape->frames[ape->currentframe].size);
410	ape->currentframe++;
411	return AVERROR(EIO);
412	}
413
414	if (av_new_packet(pkt, ape->frames[ape->currentframe].size + extra_size) < 0)
415	return AVERROR(ENOMEM);
416
417	AV_WL32(pkt->data , nblocks);
418	AV_WL32(pkt->data + 4, ape->frames[ape->currentframe].skip);
419	ret = avio_read(s->pb, pkt->data + extra_size, ape->frames[ape->currentframe].size);
420	if (ret < 0) {
421	av_free_packet(pkt);
422	return ret;
423	}
424
425	pkt->pts = ape->frames[ape->currentframe].pts;
426	pkt->stream_index = 0;
427
428	/* note: we need to modify the packet size here to handle the last
429	packet */
430	pkt->size = ret + extra_size;
431
432	ape->currentframe++;
433
434	return 0;
435	}
436
437	static int ape_read_close(AVFormatContext * s)
438	{
439	APEContext *ape = s->priv_data;
440
441	av_freep(&ape->frames);
442	av_freep(&ape->seektable);
443	av_freep(&ape->bittable);
444	return 0;
445	}
446
447	static int ape_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
448	{
449	AVStream *st = s->streams[stream_index];
450	APEContext *ape = s->priv_data;
451	int index = av_index_search_timestamp(st, timestamp, flags);
452
453	if (index < 0)
454	return -1;
455
456	if (avio_seek(s->pb, st->index_entries[index].pos, SEEK_SET) < 0)
457	return -1;
458	ape->currentframe = index;
459	return 0;
460	}
461
462	AVInputFormat ff_ape_demuxer = {
463	.name = "ape",
464	.long_name = NULL_IF_CONFIG_SMALL("Monkey's Audio"),
465	.priv_data_size = sizeof(APEContext),
466	.read_probe = ape_probe,
467	.read_header = ape_read_header,
468	.read_packet = ape_read_packet,
469	.read_close = ape_read_close,
470	.read_seek = ape_read_seek,
471	.extensions = "ape,apl,mac",
472	};