| /* |
| * 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 APEFrame { |
| int64_t pos; |
| int nblocks; |
| int size; |
| 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 */ |
| 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_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); |
| |
| 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_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 : ((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_packet_unref(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", |
| }; |