yading@11: /* yading@11: * Monkey's Audio APE demuxer yading@11: * Copyright (c) 2007 Benjamin Zores yading@11: * based upon libdemac from Dave Chapman. yading@11: * yading@11: * This file is part of FFmpeg. yading@11: * yading@11: * FFmpeg is free software; you can redistribute it and/or yading@11: * modify it under the terms of the GNU Lesser General Public yading@11: * License as published by the Free Software Foundation; either yading@11: * version 2.1 of the License, or (at your option) any later version. yading@11: * yading@11: * FFmpeg is distributed in the hope that it will be useful, yading@11: * but WITHOUT ANY WARRANTY; without even the implied warranty of yading@11: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU yading@11: * Lesser General Public License for more details. yading@11: * yading@11: * You should have received a copy of the GNU Lesser General Public yading@11: * License along with FFmpeg; if not, write to the Free Software yading@11: * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA yading@11: */ yading@11: yading@11: #include yading@11: yading@11: #include "libavutil/intreadwrite.h" yading@11: #include "avformat.h" yading@11: #include "internal.h" yading@11: #include "apetag.h" yading@11: yading@11: /* The earliest and latest file formats supported by this library */ yading@11: #define APE_MIN_VERSION 3800 yading@11: #define APE_MAX_VERSION 3990 yading@11: yading@11: #define MAC_FORMAT_FLAG_8_BIT 1 // is 8-bit [OBSOLETE] yading@11: #define MAC_FORMAT_FLAG_CRC 2 // uses the new CRC32 error detection [OBSOLETE] yading@11: #define MAC_FORMAT_FLAG_HAS_PEAK_LEVEL 4 // uint32 nPeakLevel after the header [OBSOLETE] yading@11: #define MAC_FORMAT_FLAG_24_BIT 8 // is 24-bit [OBSOLETE] yading@11: #define MAC_FORMAT_FLAG_HAS_SEEK_ELEMENTS 16 // has the number of seek elements after the peak level yading@11: #define MAC_FORMAT_FLAG_CREATE_WAV_HEADER 32 // create the wave header on decompression (not stored) yading@11: yading@11: #define APE_EXTRADATA_SIZE 6 yading@11: yading@11: typedef struct { yading@11: int64_t pos; yading@11: int nblocks; yading@11: int size; yading@11: int skip; yading@11: int64_t pts; yading@11: } APEFrame; yading@11: yading@11: typedef struct { yading@11: /* Derived fields */ yading@11: uint32_t junklength; yading@11: uint32_t firstframe; yading@11: uint32_t totalsamples; yading@11: int currentframe; yading@11: APEFrame *frames; yading@11: yading@11: /* Info from Descriptor Block */ yading@11: char magic[4]; yading@11: int16_t fileversion; yading@11: int16_t padding1; yading@11: uint32_t descriptorlength; yading@11: uint32_t headerlength; yading@11: uint32_t seektablelength; yading@11: uint32_t wavheaderlength; yading@11: uint32_t audiodatalength; yading@11: uint32_t audiodatalength_high; yading@11: uint32_t wavtaillength; yading@11: uint8_t md5[16]; yading@11: yading@11: /* Info from Header Block */ yading@11: uint16_t compressiontype; yading@11: uint16_t formatflags; yading@11: uint32_t blocksperframe; yading@11: uint32_t finalframeblocks; yading@11: uint32_t totalframes; yading@11: uint16_t bps; yading@11: uint16_t channels; yading@11: uint32_t samplerate; yading@11: yading@11: /* Seektable */ yading@11: uint32_t *seektable; yading@11: uint8_t *bittable; yading@11: } APEContext; yading@11: yading@11: static int ape_probe(AVProbeData * p) yading@11: { yading@11: if (p->buf[0] == 'M' && p->buf[1] == 'A' && p->buf[2] == 'C' && p->buf[3] == ' ') yading@11: return AVPROBE_SCORE_MAX; yading@11: yading@11: return 0; yading@11: } yading@11: yading@11: static void ape_dumpinfo(AVFormatContext * s, APEContext * ape_ctx) yading@11: { yading@11: #ifdef DEBUG yading@11: int i; yading@11: yading@11: av_log(s, AV_LOG_DEBUG, "Descriptor Block:\n\n"); yading@11: 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]); yading@11: av_log(s, AV_LOG_DEBUG, "fileversion = %"PRId16"\n", ape_ctx->fileversion); yading@11: av_log(s, AV_LOG_DEBUG, "descriptorlength = %"PRIu32"\n", ape_ctx->descriptorlength); yading@11: av_log(s, AV_LOG_DEBUG, "headerlength = %"PRIu32"\n", ape_ctx->headerlength); yading@11: av_log(s, AV_LOG_DEBUG, "seektablelength = %"PRIu32"\n", ape_ctx->seektablelength); yading@11: av_log(s, AV_LOG_DEBUG, "wavheaderlength = %"PRIu32"\n", ape_ctx->wavheaderlength); yading@11: av_log(s, AV_LOG_DEBUG, "audiodatalength = %"PRIu32"\n", ape_ctx->audiodatalength); yading@11: av_log(s, AV_LOG_DEBUG, "audiodatalength_high = %"PRIu32"\n", ape_ctx->audiodatalength_high); yading@11: av_log(s, AV_LOG_DEBUG, "wavtaillength = %"PRIu32"\n", ape_ctx->wavtaillength); yading@11: av_log(s, AV_LOG_DEBUG, "md5 = "); yading@11: for (i = 0; i < 16; i++) yading@11: av_log(s, AV_LOG_DEBUG, "%02x", ape_ctx->md5[i]); yading@11: av_log(s, AV_LOG_DEBUG, "\n"); yading@11: yading@11: av_log(s, AV_LOG_DEBUG, "\nHeader Block:\n\n"); yading@11: yading@11: av_log(s, AV_LOG_DEBUG, "compressiontype = %"PRIu16"\n", ape_ctx->compressiontype); yading@11: av_log(s, AV_LOG_DEBUG, "formatflags = %"PRIu16"\n", ape_ctx->formatflags); yading@11: av_log(s, AV_LOG_DEBUG, "blocksperframe = %"PRIu32"\n", ape_ctx->blocksperframe); yading@11: av_log(s, AV_LOG_DEBUG, "finalframeblocks = %"PRIu32"\n", ape_ctx->finalframeblocks); yading@11: av_log(s, AV_LOG_DEBUG, "totalframes = %"PRIu32"\n", ape_ctx->totalframes); yading@11: av_log(s, AV_LOG_DEBUG, "bps = %"PRIu16"\n", ape_ctx->bps); yading@11: av_log(s, AV_LOG_DEBUG, "channels = %"PRIu16"\n", ape_ctx->channels); yading@11: av_log(s, AV_LOG_DEBUG, "samplerate = %"PRIu32"\n", ape_ctx->samplerate); yading@11: yading@11: av_log(s, AV_LOG_DEBUG, "\nSeektable\n\n"); yading@11: if ((ape_ctx->seektablelength / sizeof(uint32_t)) != ape_ctx->totalframes) { yading@11: av_log(s, AV_LOG_DEBUG, "No seektable\n"); yading@11: } else { yading@11: for (i = 0; i < ape_ctx->seektablelength / sizeof(uint32_t); i++) { yading@11: if (i < ape_ctx->totalframes - 1) { yading@11: av_log(s, AV_LOG_DEBUG, "%8d %"PRIu32" (%"PRIu32" bytes)", yading@11: i, ape_ctx->seektable[i], yading@11: ape_ctx->seektable[i + 1] - ape_ctx->seektable[i]); yading@11: if (ape_ctx->bittable) yading@11: av_log(s, AV_LOG_DEBUG, " + %2d bits\n", yading@11: ape_ctx->bittable[i]); yading@11: av_log(s, AV_LOG_DEBUG, "\n"); yading@11: } else { yading@11: av_log(s, AV_LOG_DEBUG, "%8d %"PRIu32"\n", i, ape_ctx->seektable[i]); yading@11: } yading@11: } yading@11: } yading@11: yading@11: av_log(s, AV_LOG_DEBUG, "\nFrames\n\n"); yading@11: for (i = 0; i < ape_ctx->totalframes; i++) yading@11: av_log(s, AV_LOG_DEBUG, "%8d %8"PRId64" %8d (%d samples)\n", i, yading@11: ape_ctx->frames[i].pos, ape_ctx->frames[i].size, yading@11: ape_ctx->frames[i].nblocks); yading@11: yading@11: av_log(s, AV_LOG_DEBUG, "\nCalculated information:\n\n"); yading@11: av_log(s, AV_LOG_DEBUG, "junklength = %"PRIu32"\n", ape_ctx->junklength); yading@11: av_log(s, AV_LOG_DEBUG, "firstframe = %"PRIu32"\n", ape_ctx->firstframe); yading@11: av_log(s, AV_LOG_DEBUG, "totalsamples = %"PRIu32"\n", ape_ctx->totalsamples); yading@11: #endif yading@11: } yading@11: yading@11: static int ape_read_header(AVFormatContext * s) yading@11: { yading@11: AVIOContext *pb = s->pb; yading@11: APEContext *ape = s->priv_data; yading@11: AVStream *st; yading@11: uint32_t tag; yading@11: int i; yading@11: int total_blocks, final_size = 0; yading@11: int64_t pts, file_size; yading@11: yading@11: /* Skip any leading junk such as id3v2 tags */ yading@11: ape->junklength = avio_tell(pb); yading@11: yading@11: tag = avio_rl32(pb); yading@11: if (tag != MKTAG('M', 'A', 'C', ' ')) yading@11: return AVERROR_INVALIDDATA; yading@11: yading@11: ape->fileversion = avio_rl16(pb); yading@11: yading@11: if (ape->fileversion < APE_MIN_VERSION || ape->fileversion > APE_MAX_VERSION) { yading@11: av_log(s, AV_LOG_ERROR, "Unsupported file version - %d.%02d\n", yading@11: ape->fileversion / 1000, (ape->fileversion % 1000) / 10); yading@11: return AVERROR_PATCHWELCOME; yading@11: } yading@11: yading@11: if (ape->fileversion >= 3980) { yading@11: ape->padding1 = avio_rl16(pb); yading@11: ape->descriptorlength = avio_rl32(pb); yading@11: ape->headerlength = avio_rl32(pb); yading@11: ape->seektablelength = avio_rl32(pb); yading@11: ape->wavheaderlength = avio_rl32(pb); yading@11: ape->audiodatalength = avio_rl32(pb); yading@11: ape->audiodatalength_high = avio_rl32(pb); yading@11: ape->wavtaillength = avio_rl32(pb); yading@11: avio_read(pb, ape->md5, 16); yading@11: yading@11: /* Skip any unknown bytes at the end of the descriptor. yading@11: This is for future compatibility */ yading@11: if (ape->descriptorlength > 52) yading@11: avio_skip(pb, ape->descriptorlength - 52); yading@11: yading@11: /* Read header data */ yading@11: ape->compressiontype = avio_rl16(pb); yading@11: ape->formatflags = avio_rl16(pb); yading@11: ape->blocksperframe = avio_rl32(pb); yading@11: ape->finalframeblocks = avio_rl32(pb); yading@11: ape->totalframes = avio_rl32(pb); yading@11: ape->bps = avio_rl16(pb); yading@11: ape->channels = avio_rl16(pb); yading@11: ape->samplerate = avio_rl32(pb); yading@11: } else { yading@11: ape->descriptorlength = 0; yading@11: ape->headerlength = 32; yading@11: yading@11: ape->compressiontype = avio_rl16(pb); yading@11: ape->formatflags = avio_rl16(pb); yading@11: ape->channels = avio_rl16(pb); yading@11: ape->samplerate = avio_rl32(pb); yading@11: ape->wavheaderlength = avio_rl32(pb); yading@11: ape->wavtaillength = avio_rl32(pb); yading@11: ape->totalframes = avio_rl32(pb); yading@11: ape->finalframeblocks = avio_rl32(pb); yading@11: yading@11: if (ape->formatflags & MAC_FORMAT_FLAG_HAS_PEAK_LEVEL) { yading@11: avio_skip(pb, 4); /* Skip the peak level */ yading@11: ape->headerlength += 4; yading@11: } yading@11: yading@11: if (ape->formatflags & MAC_FORMAT_FLAG_HAS_SEEK_ELEMENTS) { yading@11: ape->seektablelength = avio_rl32(pb); yading@11: ape->headerlength += 4; yading@11: ape->seektablelength *= sizeof(int32_t); yading@11: } else yading@11: ape->seektablelength = ape->totalframes * sizeof(int32_t); yading@11: yading@11: if (ape->formatflags & MAC_FORMAT_FLAG_8_BIT) yading@11: ape->bps = 8; yading@11: else if (ape->formatflags & MAC_FORMAT_FLAG_24_BIT) yading@11: ape->bps = 24; yading@11: else yading@11: ape->bps = 16; yading@11: yading@11: if (ape->fileversion >= 3950) yading@11: ape->blocksperframe = 73728 * 4; yading@11: else if (ape->fileversion >= 3900 || (ape->fileversion >= 3800 && ape->compressiontype >= 4000)) yading@11: ape->blocksperframe = 73728; yading@11: else yading@11: ape->blocksperframe = 9216; yading@11: yading@11: /* Skip any stored wav header */ yading@11: if (!(ape->formatflags & MAC_FORMAT_FLAG_CREATE_WAV_HEADER)) yading@11: avio_skip(pb, ape->wavheaderlength); yading@11: } yading@11: yading@11: if(!ape->totalframes){ yading@11: av_log(s, AV_LOG_ERROR, "No frames in the file!\n"); yading@11: return AVERROR(EINVAL); yading@11: } yading@11: if(ape->totalframes > UINT_MAX / sizeof(APEFrame)){ yading@11: av_log(s, AV_LOG_ERROR, "Too many frames: %"PRIu32"\n", yading@11: ape->totalframes); yading@11: return AVERROR_INVALIDDATA; yading@11: } yading@11: if (ape->seektablelength && (ape->seektablelength / sizeof(*ape->seektable)) < ape->totalframes) { yading@11: av_log(s, AV_LOG_ERROR, yading@11: "Number of seek entries is less than number of frames: %zu vs. %"PRIu32"\n", yading@11: ape->seektablelength / sizeof(*ape->seektable), ape->totalframes); yading@11: return AVERROR_INVALIDDATA; yading@11: } yading@11: ape->frames = av_malloc(ape->totalframes * sizeof(APEFrame)); yading@11: if(!ape->frames) yading@11: return AVERROR(ENOMEM); yading@11: ape->firstframe = ape->junklength + ape->descriptorlength + ape->headerlength + ape->seektablelength + ape->wavheaderlength; yading@11: if (ape->fileversion < 3810) yading@11: ape->firstframe += ape->totalframes; yading@11: ape->currentframe = 0; yading@11: yading@11: yading@11: ape->totalsamples = ape->finalframeblocks; yading@11: if (ape->totalframes > 1) yading@11: ape->totalsamples += ape->blocksperframe * (ape->totalframes - 1); yading@11: yading@11: if (ape->seektablelength > 0) { yading@11: ape->seektable = av_malloc(ape->seektablelength); yading@11: if (!ape->seektable) yading@11: return AVERROR(ENOMEM); yading@11: for (i = 0; i < ape->seektablelength / sizeof(uint32_t); i++) yading@11: ape->seektable[i] = avio_rl32(pb); yading@11: if (ape->fileversion < 3810) { yading@11: ape->bittable = av_malloc(ape->totalframes); yading@11: if (!ape->bittable) yading@11: return AVERROR(ENOMEM); yading@11: for (i = 0; i < ape->totalframes; i++) yading@11: ape->bittable[i] = avio_r8(pb); yading@11: } yading@11: }else{ yading@11: av_log(s, AV_LOG_ERROR, "Missing seektable\n"); yading@11: return AVERROR_INVALIDDATA; yading@11: } yading@11: yading@11: ape->frames[0].pos = ape->firstframe; yading@11: ape->frames[0].nblocks = ape->blocksperframe; yading@11: ape->frames[0].skip = 0; yading@11: for (i = 1; i < ape->totalframes; i++) { yading@11: ape->frames[i].pos = ape->seektable[i] + ape->junklength; yading@11: ape->frames[i].nblocks = ape->blocksperframe; yading@11: ape->frames[i - 1].size = ape->frames[i].pos - ape->frames[i - 1].pos; yading@11: ape->frames[i].skip = (ape->frames[i].pos - ape->frames[0].pos) & 3; yading@11: } yading@11: ape->frames[ape->totalframes - 1].nblocks = ape->finalframeblocks; yading@11: /* calculate final packet size from total file size, if available */ yading@11: file_size = avio_size(pb); yading@11: if (file_size > 0) { yading@11: final_size = file_size - ape->frames[ape->totalframes - 1].pos - yading@11: ape->wavtaillength; yading@11: final_size -= final_size & 3; yading@11: } yading@11: if (file_size <= 0 || final_size <= 0) yading@11: final_size = ape->finalframeblocks * 8; yading@11: ape->frames[ape->totalframes - 1].size = final_size; yading@11: yading@11: for (i = 0; i < ape->totalframes; i++) { yading@11: if(ape->frames[i].skip){ yading@11: ape->frames[i].pos -= ape->frames[i].skip; yading@11: ape->frames[i].size += ape->frames[i].skip; yading@11: } yading@11: ape->frames[i].size = (ape->frames[i].size + 3) & ~3; yading@11: } yading@11: if (ape->fileversion < 3810) { yading@11: for (i = 0; i < ape->totalframes; i++) { yading@11: if (i < ape->totalframes - 1 && ape->bittable[i + 1]) yading@11: ape->frames[i].size += 4; yading@11: ape->frames[i].skip <<= 3; yading@11: ape->frames[i].skip += ape->bittable[i]; yading@11: } yading@11: } yading@11: yading@11: ape_dumpinfo(s, ape); yading@11: yading@11: av_log(s, AV_LOG_DEBUG, "Decoding file - v%d.%02d, compression level %"PRIu16"\n", yading@11: ape->fileversion / 1000, (ape->fileversion % 1000) / 10, yading@11: ape->compressiontype); yading@11: yading@11: /* now we are ready: build format streams */ yading@11: st = avformat_new_stream(s, NULL); yading@11: if (!st) yading@11: return AVERROR(ENOMEM); yading@11: yading@11: total_blocks = (ape->totalframes == 0) ? 0 : ((ape->totalframes - 1) * ape->blocksperframe) + ape->finalframeblocks; yading@11: yading@11: st->codec->codec_type = AVMEDIA_TYPE_AUDIO; yading@11: st->codec->codec_id = AV_CODEC_ID_APE; yading@11: st->codec->codec_tag = MKTAG('A', 'P', 'E', ' '); yading@11: st->codec->channels = ape->channels; yading@11: st->codec->sample_rate = ape->samplerate; yading@11: st->codec->bits_per_coded_sample = ape->bps; yading@11: yading@11: st->nb_frames = ape->totalframes; yading@11: st->start_time = 0; yading@11: st->duration = total_blocks; yading@11: avpriv_set_pts_info(st, 64, 1, ape->samplerate); yading@11: yading@11: st->codec->extradata = av_malloc(APE_EXTRADATA_SIZE); yading@11: st->codec->extradata_size = APE_EXTRADATA_SIZE; yading@11: AV_WL16(st->codec->extradata + 0, ape->fileversion); yading@11: AV_WL16(st->codec->extradata + 2, ape->compressiontype); yading@11: AV_WL16(st->codec->extradata + 4, ape->formatflags); yading@11: yading@11: pts = 0; yading@11: for (i = 0; i < ape->totalframes; i++) { yading@11: ape->frames[i].pts = pts; yading@11: av_add_index_entry(st, ape->frames[i].pos, ape->frames[i].pts, 0, 0, AVINDEX_KEYFRAME); yading@11: pts += ape->blocksperframe; yading@11: } yading@11: yading@11: /* try to read APE tags */ yading@11: if (pb->seekable) { yading@11: ff_ape_parse_tag(s); yading@11: avio_seek(pb, 0, SEEK_SET); yading@11: } yading@11: yading@11: return 0; yading@11: } yading@11: yading@11: static int ape_read_packet(AVFormatContext * s, AVPacket * pkt) yading@11: { yading@11: int ret; yading@11: int nblocks; yading@11: APEContext *ape = s->priv_data; yading@11: uint32_t extra_size = 8; yading@11: yading@11: if (url_feof(s->pb)) yading@11: return AVERROR_EOF; yading@11: if (ape->currentframe >= ape->totalframes) yading@11: return AVERROR_EOF; yading@11: yading@11: if (avio_seek(s->pb, ape->frames[ape->currentframe].pos, SEEK_SET) < 0) yading@11: return AVERROR(EIO); yading@11: yading@11: /* Calculate how many blocks there are in this frame */ yading@11: if (ape->currentframe == (ape->totalframes - 1)) yading@11: nblocks = ape->finalframeblocks; yading@11: else yading@11: nblocks = ape->blocksperframe; yading@11: yading@11: if (ape->frames[ape->currentframe].size <= 0 || yading@11: ape->frames[ape->currentframe].size > INT_MAX - extra_size) { yading@11: av_log(s, AV_LOG_ERROR, "invalid packet size: %d\n", yading@11: ape->frames[ape->currentframe].size); yading@11: ape->currentframe++; yading@11: return AVERROR(EIO); yading@11: } yading@11: yading@11: if (av_new_packet(pkt, ape->frames[ape->currentframe].size + extra_size) < 0) yading@11: return AVERROR(ENOMEM); yading@11: yading@11: AV_WL32(pkt->data , nblocks); yading@11: AV_WL32(pkt->data + 4, ape->frames[ape->currentframe].skip); yading@11: ret = avio_read(s->pb, pkt->data + extra_size, ape->frames[ape->currentframe].size); yading@11: yading@11: pkt->pts = ape->frames[ape->currentframe].pts; yading@11: pkt->stream_index = 0; yading@11: yading@11: /* note: we need to modify the packet size here to handle the last yading@11: packet */ yading@11: pkt->size = ret + extra_size; yading@11: yading@11: ape->currentframe++; yading@11: yading@11: return 0; yading@11: } yading@11: yading@11: static int ape_read_close(AVFormatContext * s) yading@11: { yading@11: APEContext *ape = s->priv_data; yading@11: yading@11: av_freep(&ape->frames); yading@11: av_freep(&ape->seektable); yading@11: av_freep(&ape->bittable); yading@11: return 0; yading@11: } yading@11: yading@11: static int ape_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags) yading@11: { yading@11: AVStream *st = s->streams[stream_index]; yading@11: APEContext *ape = s->priv_data; yading@11: int index = av_index_search_timestamp(st, timestamp, flags); yading@11: yading@11: if (index < 0) yading@11: return -1; yading@11: yading@11: if (avio_seek(s->pb, st->index_entries[index].pos, SEEK_SET) < 0) yading@11: return -1; yading@11: ape->currentframe = index; yading@11: return 0; yading@11: } yading@11: yading@11: AVInputFormat ff_ape_demuxer = { yading@11: .name = "ape", yading@11: .long_name = NULL_IF_CONFIG_SMALL("Monkey's Audio"), yading@11: .priv_data_size = sizeof(APEContext), yading@11: .read_probe = ape_probe, yading@11: .read_header = ape_read_header, yading@11: .read_packet = ape_read_packet, yading@11: .read_close = ape_read_close, yading@11: .read_seek = ape_read_seek, yading@11: .extensions = "ape,apl,mac", yading@11: };