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* Copyright (c) 2006 Konstantin Shishkov
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* This file is part of FFmpeg.
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* FFmpeg is free software; you can redistribute it and/or
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* Copyright (c) 2006,2011 Konstantin Shishkov
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* This file is part of Libav.
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* Libav is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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* FFmpeg is distributed in the hope that it will be useful,
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* Libav is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* License along with Libav; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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#include "libavutil/audioconvert.h"
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#include "libavutil/intreadwrite.h"
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#include "avformat.h"
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#include "apetag.h"
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static int wv_read_block_header(AVFormatContext *ctx, ByteIOContext *pb)
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static int wv_read_block_header(AVFormatContext *ctx, AVIOContext *pb, int append)
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WVContext *wc = ctx->priv_data;
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int rate, bpp, chan;
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wc->pos = url_ftell(pb);
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if (tag != MKTAG('w', 'v', 'p', 'k'))
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if(size < 24 || size > WV_BLOCK_LIMIT){
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av_log(ctx, AV_LOG_ERROR, "Incorrect block size %i\n", size);
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if(ver < 0x402 || ver > 0x410){
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av_log(ctx, AV_LOG_ERROR, "Unsupported version %03X\n", ver);
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get_byte(pb); // track no
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get_byte(pb); // track sub index
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wc->samples = get_le32(pb); // total samples in file
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wc->soff = get_le32(pb); // offset in samples of current block
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get_buffer(pb, wc->extra, WV_EXTRA_SIZE);
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wc->pos = avio_tell(pb);
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if (tag != MKTAG('w', 'v', 'p', 'k'))
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if(size < 24 || size > WV_BLOCK_LIMIT){
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av_log(ctx, AV_LOG_ERROR, "Incorrect block size %i\n", size);
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if(ver < 0x402 || ver > 0x410){
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av_log(ctx, AV_LOG_ERROR, "Unsupported version %03X\n", ver);
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avio_r8(pb); // track no
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avio_r8(pb); // track sub index
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wc->samples = avio_rl32(pb); // total samples in file
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wc->soff = avio_rl32(pb); // offset in samples of current block
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avio_read(pb, wc->extra, WV_EXTRA_SIZE);
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wc->flags = AV_RL32(wc->extra + 4);
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bpp = ((wc->flags & 3) + 1) << 3;
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chan = 1 + !(wc->flags & WV_MONO);
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chmask = wc->flags & WV_MONO ? AV_CH_LAYOUT_MONO : AV_CH_LAYOUT_STEREO;
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rate = wv_rates[(wc->flags >> 23) & 0xF];
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if(rate == -1 && !wc->block_parsed){
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int64_t block_end = url_ftell(pb) + wc->blksize - 24;
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if(url_is_streamed(pb)){
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av_log(ctx, AV_LOG_ERROR, "Cannot determine custom sampling rate\n");
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wc->multichannel = !!((wc->flags & WV_SINGLE_BLOCK) != WV_SINGLE_BLOCK);
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if(wc->multichannel){
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if((rate == -1 || !chan) && !wc->block_parsed){
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int64_t block_end = avio_tell(pb) + wc->blksize - 24;
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av_log(ctx, AV_LOG_ERROR, "Cannot determine additional parameters\n");
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while(url_ftell(pb) < block_end){
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while(avio_tell(pb) < block_end){
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size = (id & 0x80) ? get_le24(pb) : get_byte(pb);
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size = (id & 0x80) ? avio_rl24(pb) : avio_r8(pb);
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if((id&0x3F) == 0x27){
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av_log(ctx, AV_LOG_ERROR, "Insufficient channel information\n");
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chmask = avio_r8(pb);
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chmask = avio_rl16(pb);
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chmask = avio_rl24(pb);
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chmask = avio_rl32(pb);
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chan |= (avio_r8(pb) & 0xF) << 8;
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chmask = avio_rl24(pb);
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av_log(ctx, AV_LOG_ERROR, "Invalid channel info size %d\n", size);
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rate = avio_rl24(pb);
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av_log(ctx, AV_LOG_ERROR, "Cannot determine custom sampling rate\n");
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url_fseek(pb, block_end - wc->blksize + 24, SEEK_SET);
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avio_seek(pb, block_end - wc->blksize + 24, SEEK_SET);
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if(!wc->bpp) wc->bpp = bpp;
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if(!wc->chan) wc->chan = chan;
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if(!wc->chmask) wc->chmask = chmask;
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if(!wc->rate) wc->rate = rate;
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if(wc->flags && bpp != wc->bpp){
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av_log(ctx, AV_LOG_ERROR, "Bits per sample differ, this block: %i, header block: %i\n", bpp, wc->bpp);
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if(wc->flags && chan != wc->chan){
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if(wc->flags && !wc->multichannel && chan != wc->chan){
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av_log(ctx, AV_LOG_ERROR, "Channels differ, this block: %i, header block: %i\n", chan, wc->chan);
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st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
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st->codec->codec_id = CODEC_ID_WAVPACK;
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st->codec->channels = wc->chan;
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st->codec->channel_layout = wc->chmask;
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st->codec->sample_rate = wc->rate;
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st->codec->bits_per_coded_sample = wc->bpp;
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av_set_pts_info(st, 64, 1, wc->rate);
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st->start_time = 0;
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st->duration = wc->samples;
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if(!url_is_streamed(s->pb)) {
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int64_t cur = url_ftell(s->pb);
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if(s->pb->seekable) {
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int64_t cur = avio_tell(s->pb);
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ff_ape_parse_tag(s);
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if(!av_metadata_get(s->metadata, "", NULL, AV_METADATA_IGNORE_SUFFIX))
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ff_id3v1_read(s);
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url_fseek(s->pb, cur, SEEK_SET);
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avio_seek(s->pb, cur, SEEK_SET);
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WVContext *wc = s->priv_data;
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if (s->pb->eof_reached)
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return AVERROR(EIO);
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if(wc->block_parsed){
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if(wv_read_block_header(s, s->pb) < 0)
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if(wv_read_block_header(s, s->pb, 0) < 0)
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if(av_new_packet(pkt, wc->blksize + WV_EXTRA_SIZE) < 0)
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off = wc->multichannel ? 4 : 0;
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if(av_new_packet(pkt, wc->blksize + WV_EXTRA_SIZE + off) < 0)
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return AVERROR(ENOMEM);
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memcpy(pkt->data, wc->extra, WV_EXTRA_SIZE);
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ret = get_buffer(s->pb, pkt->data + WV_EXTRA_SIZE, wc->blksize);
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AV_WL32(pkt->data, wc->blksize + WV_EXTRA_SIZE + 12);
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memcpy(pkt->data + off, wc->extra, WV_EXTRA_SIZE);
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ret = avio_read(s->pb, pkt->data + WV_EXTRA_SIZE + off, wc->blksize);
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if(ret != wc->blksize){
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av_free_packet(pkt);
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return AVERROR(EIO);
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while(!(wc->flags & WV_END_BLOCK)){
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if(avio_rl32(s->pb) != MKTAG('w', 'v', 'p', 'k')){
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if((ret = av_append_packet(s->pb, pkt, 4)) < 0){
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size = AV_RL32(pkt->data + pkt->size - 4);
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if(size < 24 || size > WV_BLOCK_LIMIT){
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av_log(s, AV_LOG_ERROR, "Incorrect block size %d\n", size);
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ver = avio_rl16(s->pb);
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if(ver < 0x402 || ver > 0x410){
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av_log(s, AV_LOG_ERROR, "Unsupported version %03X\n", ver);
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avio_r8(s->pb); // track no
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avio_r8(s->pb); // track sub index
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wc->samples = avio_rl32(s->pb); // total samples in file
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wc->soff = avio_rl32(s->pb); // offset in samples of current block
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if((ret = av_append_packet(s->pb, pkt, WV_EXTRA_SIZE)) < 0){
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memcpy(wc->extra, pkt->data + pkt->size - WV_EXTRA_SIZE, WV_EXTRA_SIZE);
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if(wv_read_block_header(s, s->pb, 1) < 0){
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ret = av_append_packet(s->pb, pkt, wc->blksize);
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pkt->stream_index = 0;
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wc->block_parsed = 1;
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pkt->size = ret + WV_EXTRA_SIZE;
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pkt->pts = wc->soff;
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av_add_index_entry(s->streams[0], wc->pos, pkt->pts, 0, 0, AVINDEX_KEYFRAME);
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/* if found, seek there */
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wc->block_parsed = 1;
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url_fseek(s->pb, st->index_entries[index].pos, SEEK_SET);
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avio_seek(s->pb, st->index_entries[index].pos, SEEK_SET);
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/* if timestamp is out of bounds, return error */
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if(timestamp < 0 || timestamp >= s->duration)
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pos = url_ftell(s->pb);
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pos = avio_tell(s->pb);
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ret = av_read_frame(s, pkt);
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url_fseek(s->pb, pos, SEEK_SET);
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avio_seek(s->pb, pos, SEEK_SET);