diff options
Diffstat (limited to 'contrib/ffmpeg/libavformat/ape.c')
| -rw-r--r-- | contrib/ffmpeg/libavformat/ape.c | 523 |
1 files changed, 0 insertions, 523 deletions
diff --git a/contrib/ffmpeg/libavformat/ape.c b/contrib/ffmpeg/libavformat/ape.c deleted file mode 100644 index a90f887e5..000000000 --- a/contrib/ffmpeg/libavformat/ape.c +++ /dev/null @@ -1,523 +0,0 @@ -/* - * 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 "avformat.h" - -#define ENABLE_DEBUG 0 - -/* The earliest and latest file formats supported by this library */ -#define APE_MIN_VERSION 3950 -#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 MAC_SUBFRAME_SIZE 4608 - -#define APE_EXTRADATA_SIZE 6 - -/* APE tags */ -#define APE_TAG_VERSION 2000 -#define APE_TAG_FOOTER_BYTES 32 -#define APE_TAG_FLAG_CONTAINS_HEADER (1 << 31) -#define APE_TAG_FLAG_IS_HEADER (1 << 29) - -#define TAG(name, field) {name, offsetof(AVFormatContext, field), sizeof(((AVFormatContext *)0)->field)} - -static const struct { - const char *name; - int offset; - int size; -} tags[] = { - TAG("Title" , title ), - TAG("Artist" , author ), - TAG("Copyright", copyright), - TAG("Comment" , comment ), - TAG("Album" , album ), - TAG("Year" , year ), - TAG("Track" , track ), - TAG("Genre" , genre ), - { NULL } -}; - -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; -} APEContext; - -static void ape_tag_read_field(AVFormatContext *s) -{ - ByteIOContext *pb = s->pb; - uint8_t buf[1024]; - uint32_t size; - int i; - - memset(buf, 0, 1024); - size = get_le32(pb); /* field size */ - url_fskip(pb, 4); /* skip field flags */ - - for (i=0; pb->buf_ptr[i]!='0' && pb->buf_ptr[i]>=0x20 && pb->buf_ptr[i]<=0x7E; i++); - - get_buffer(pb, buf, FFMIN(i, 1024)); - url_fskip(pb, 1); - - for (i=0; tags[i].name; i++) - if (!strcmp (buf, tags[i].name)) { - if (tags[i].size == sizeof(int)) { - char tmp[16]; - get_buffer(pb, tmp, FFMIN(sizeof(tmp), size)); - *(int *)(((char *)s)+tags[i].offset) = atoi(tmp); - } else { - get_buffer(pb, ((char *)s) + tags[i].offset, - FFMIN(tags[i].size, size)); - } - break; - } - - if (!tags[i].name) - url_fskip(pb, size); -} - -static void ape_parse_tag(AVFormatContext *s) -{ - ByteIOContext *pb = s->pb; - int file_size = url_fsize(pb); - uint32_t val, fields, tag_bytes; - uint8_t buf[8]; - int i; - - if (file_size < APE_TAG_FOOTER_BYTES) - return; - - url_fseek(pb, file_size - APE_TAG_FOOTER_BYTES, SEEK_SET); - - get_buffer(pb, buf, 8); /* APETAGEX */ - if (strncmp(buf, "APETAGEX", 8)) { - av_log(NULL, AV_LOG_ERROR, "Invalid APE Tags\n"); - return; - } - - val = get_le32(pb); /* APE tag version */ - if (val > APE_TAG_VERSION) { - av_log(NULL, AV_LOG_ERROR, "Unsupported tag version. (>=%d)\n", APE_TAG_VERSION); - return; - } - - tag_bytes = get_le32(pb); /* tag size */ - if (tag_bytes - APE_TAG_FOOTER_BYTES > (1024 * 1024 * 16)) { - av_log(NULL, AV_LOG_ERROR, "Tag size is way too big\n"); - return; - } - - fields = get_le32(pb); /* number of fields */ - if (fields > 65536) { - av_log(NULL, AV_LOG_ERROR, "Too many tag fields (%d)\n", fields); - return; - } - - val = get_le32(pb); /* flags */ - if (val & APE_TAG_FLAG_IS_HEADER) { - av_log(NULL, AV_LOG_ERROR, "APE Tag is a header\n"); - return; - } - - if (val & APE_TAG_FLAG_CONTAINS_HEADER) - tag_bytes += 2*APE_TAG_FOOTER_BYTES; - - url_fseek(pb, file_size - tag_bytes, SEEK_SET); - - for (i=0; i<fields; i++) - ape_tag_read_field(s); - -#if ENABLE_DEBUG - av_log(NULL, AV_LOG_DEBUG, "\nAPE Tags:\n\n"); - av_log(NULL, AV_LOG_DEBUG, "title = %s\n", s->title); - av_log(NULL, AV_LOG_DEBUG, "author = %s\n", s->author); - av_log(NULL, AV_LOG_DEBUG, "copyright = %s\n", s->copyright); - av_log(NULL, AV_LOG_DEBUG, "comment = %s\n", s->comment); - av_log(NULL, AV_LOG_DEBUG, "album = %s\n", s->album); - av_log(NULL, AV_LOG_DEBUG, "year = %d\n", s->year); - av_log(NULL, AV_LOG_DEBUG, "track = %d\n", s->track); - av_log(NULL, AV_LOG_DEBUG, "genre = %s\n", s->genre); -#endif -} - -static int ape_probe(AVProbeData * p) -{ - if (p->buf[0] == 'M' && p->buf[1] == 'A' && p->buf[2] == 'C' && p->buf[3] == ' ') - return AVPROBE_SCORE_MAX; - - return 0; -} - -static void ape_dumpinfo(APEContext * ape_ctx) -{ -#if ENABLE_DEBUG - int i; - - av_log(NULL, AV_LOG_DEBUG, "Descriptor Block:\n\n"); - av_log(NULL, 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(NULL, AV_LOG_DEBUG, "fileversion = %d\n", ape_ctx->fileversion); - av_log(NULL, AV_LOG_DEBUG, "descriptorlength = %d\n", ape_ctx->descriptorlength); - av_log(NULL, AV_LOG_DEBUG, "headerlength = %d\n", ape_ctx->headerlength); - av_log(NULL, AV_LOG_DEBUG, "seektablelength = %d\n", ape_ctx->seektablelength); - av_log(NULL, AV_LOG_DEBUG, "wavheaderlength = %d\n", ape_ctx->wavheaderlength); - av_log(NULL, AV_LOG_DEBUG, "audiodatalength = %d\n", ape_ctx->audiodatalength); - av_log(NULL, AV_LOG_DEBUG, "audiodatalength_high = %d\n", ape_ctx->audiodatalength_high); - av_log(NULL, AV_LOG_DEBUG, "wavtaillength = %d\n", ape_ctx->wavtaillength); - av_log(NULL, AV_LOG_DEBUG, "md5 = "); - for (i = 0; i < 16; i++) - av_log(NULL, AV_LOG_DEBUG, "%02x", ape_ctx->md5[i]); - av_log(NULL, AV_LOG_DEBUG, "\n"); - - av_log(NULL, AV_LOG_DEBUG, "\nHeader Block:\n\n"); - - av_log(NULL, AV_LOG_DEBUG, "compressiontype = %d\n", ape_ctx->compressiontype); - av_log(NULL, AV_LOG_DEBUG, "formatflags = %d\n", ape_ctx->formatflags); - av_log(NULL, AV_LOG_DEBUG, "blocksperframe = %d\n", ape_ctx->blocksperframe); - av_log(NULL, AV_LOG_DEBUG, "finalframeblocks = %d\n", ape_ctx->finalframeblocks); - av_log(NULL, AV_LOG_DEBUG, "totalframes = %d\n", ape_ctx->totalframes); - av_log(NULL, AV_LOG_DEBUG, "bps = %d\n", ape_ctx->bps); - av_log(NULL, AV_LOG_DEBUG, "channels = %d\n", ape_ctx->channels); - av_log(NULL, AV_LOG_DEBUG, "samplerate = %d\n", ape_ctx->samplerate); - - av_log(NULL, AV_LOG_DEBUG, "\nSeektable\n\n"); - if ((ape_ctx->seektablelength / sizeof(uint32_t)) != ape_ctx->totalframes) { - av_log(NULL, 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(NULL, AV_LOG_DEBUG, "%8d %d (%d bytes)\n", i, ape_ctx->seektable[i], ape_ctx->seektable[i + 1] - ape_ctx->seektable[i]); - } else { - av_log(NULL, AV_LOG_DEBUG, "%8d %d\n", i, ape_ctx->seektable[i]); - } - } - } - - av_log(NULL, AV_LOG_DEBUG, "\nFrames\n\n"); - for (i = 0; i < ape_ctx->totalframes; i++) - av_log(NULL, AV_LOG_DEBUG, "%8d %8lld %8d (%d samples)\n", i, ape_ctx->frames[i].pos, ape_ctx->frames[i].size, ape_ctx->frames[i].nblocks); - - av_log(NULL, AV_LOG_DEBUG, "\nCalculated information:\n\n"); - av_log(NULL, AV_LOG_DEBUG, "junklength = %d\n", ape_ctx->junklength); - av_log(NULL, AV_LOG_DEBUG, "firstframe = %d\n", ape_ctx->firstframe); - av_log(NULL, AV_LOG_DEBUG, "totalsamples = %d\n", ape_ctx->totalsamples); -#endif -} - -static int ape_read_header(AVFormatContext * s, AVFormatParameters * ap) -{ - ByteIOContext *pb = s->pb; - APEContext *ape = s->priv_data; - AVStream *st; - uint32_t tag; - int i; - int total_blocks; - int64_t pts; - - /* TODO: Skip any leading junk such as id3v2 tags */ - ape->junklength = 0; - - tag = get_le32(pb); - if (tag != MKTAG('M', 'A', 'C', ' ')) - return -1; - - ape->fileversion = get_le16(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 -1; - } - - if (ape->fileversion >= 3980) { - ape->padding1 = get_le16(pb); - ape->descriptorlength = get_le32(pb); - ape->headerlength = get_le32(pb); - ape->seektablelength = get_le32(pb); - ape->wavheaderlength = get_le32(pb); - ape->audiodatalength = get_le32(pb); - ape->audiodatalength_high = get_le32(pb); - ape->wavtaillength = get_le32(pb); - get_buffer(pb, ape->md5, 16); - - /* Skip any unknown bytes at the end of the descriptor. - This is for future compatibility */ - if (ape->descriptorlength > 52) - url_fseek(pb, ape->descriptorlength - 52, SEEK_CUR); - - /* Read header data */ - ape->compressiontype = get_le16(pb); - ape->formatflags = get_le16(pb); - ape->blocksperframe = get_le32(pb); - ape->finalframeblocks = get_le32(pb); - ape->totalframes = get_le32(pb); - ape->bps = get_le16(pb); - ape->channels = get_le16(pb); - ape->samplerate = get_le32(pb); - } else { - ape->descriptorlength = 0; - ape->headerlength = 32; - - ape->compressiontype = get_le16(pb); - ape->formatflags = get_le16(pb); - ape->channels = get_le16(pb); - ape->samplerate = get_le32(pb); - ape->wavheaderlength = get_le32(pb); - ape->wavtaillength = get_le32(pb); - ape->totalframes = get_le32(pb); - ape->finalframeblocks = get_le32(pb); - - if (ape->formatflags & MAC_FORMAT_FLAG_HAS_PEAK_LEVEL) { - url_fseek(pb, 4, SEEK_CUR); /* Skip the peak level */ - ape->headerlength += 4; - } - - if (ape->formatflags & MAC_FORMAT_FLAG_HAS_SEEK_ELEMENTS) { - ape->seektablelength = get_le32(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)) - url_fskip(pb, ape->wavheaderlength); - } - - if(ape->totalframes > UINT_MAX / sizeof(APEFrame)){ - av_log(s, AV_LOG_ERROR, "Too many frames: %d\n", ape->totalframes); - return -1; - } - ape->frames = av_malloc(ape->totalframes * sizeof(APEFrame)); - if(!ape->frames) - return AVERROR_NOMEM; - ape->firstframe = ape->junklength + ape->descriptorlength + ape->headerlength + ape->seektablelength + ape->wavheaderlength; - 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_malloc(ape->seektablelength); - for (i = 0; i < ape->seektablelength / sizeof(uint32_t); i++) - ape->seektable[i] = get_le32(pb); - } - - 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->frames[i-1].pos + ape->blocksperframe; - 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].size = ape->finalframeblocks * 4; - ape->frames[ape->totalframes - 1].nblocks = ape->finalframeblocks; - - 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; - } - - - ape_dumpinfo(ape); - - /* try to read APE tags */ - if (!url_is_streamed(pb)) { - ape_parse_tag(s); - url_fseek(pb, 0, SEEK_SET); - } - - av_log(s, AV_LOG_DEBUG, "Decoding file - v%d.%02d, compression level %d\n", ape->fileversion / 1000, (ape->fileversion % 1000) / 10, ape->compressiontype); - - /* now we are ready: build format streams */ - st = av_new_stream(s, 0); - if (!st) - return -1; - - total_blocks = (ape->totalframes == 0) ? 0 : ((ape->totalframes - 1) * ape->blocksperframe) + ape->finalframeblocks; - - st->codec->codec_type = CODEC_TYPE_AUDIO; - st->codec->codec_id = 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_sample = ape->bps; - st->codec->frame_size = MAC_SUBFRAME_SIZE; - - st->nb_frames = ape->totalframes; - s->start_time = 0; - s->duration = (int64_t) total_blocks * AV_TIME_BASE / ape->samplerate; - av_set_pts_info(st, 64, MAC_SUBFRAME_SIZE, ape->samplerate); - - st->codec->extradata = av_malloc(APE_EXTRADATA_SIZE); - st->codec->extradata_size = APE_EXTRADATA_SIZE; - 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 / MAC_SUBFRAME_SIZE; - } - - 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 (url_feof(s->pb)) - return AVERROR_IO; - if (ape->currentframe > ape->totalframes) - return AVERROR_IO; - - url_fseek (s->pb, ape->frames[ape->currentframe].pos, SEEK_SET); - - /* Calculate how many blocks there are in this frame */ - if (ape->currentframe == (ape->totalframes - 1)) - nblocks = ape->finalframeblocks; - else - nblocks = ape->blocksperframe; - - if (av_new_packet(pkt, ape->frames[ape->currentframe].size + extra_size) < 0) - return AVERROR_NOMEM; - - AV_WL32(pkt->data , nblocks); - AV_WL32(pkt->data + 4, ape->frames[ape->currentframe].skip); - ret = get_buffer(s->pb, pkt->data + extra_size, ape->frames[ape->currentframe].size); - - 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); - 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; - - ape->currentframe = index; - return 0; -} - -AVInputFormat ape_demuxer = { - "ape", - "Monkey's Audio", - sizeof(APEContext), - ape_probe, - ape_read_header, - ape_read_packet, - ape_read_close, - ape_read_seek, - .extensions = "ape,apl,mac" -}; |