/*
* WavPack demuxer
- * Copyright (c) 2006 Konstantin Shishkov.
+ * Copyright (c) 2006,2011 Konstantin Shishkov
*
- * This file is part of FFmpeg.
+ * This file is part of Libav.
*
- * FFmpeg is free software; you can redistribute it and/or
+ * Libav 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,
+ * Libav 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
+ * License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
+#include "libavutil/audioconvert.h"
+#include "libavutil/intreadwrite.h"
+#include "libavutil/dict.h"
#include "avformat.h"
-#include "allformats.h"
-#include "bswap.h"
+#include "internal.h"
+#include "apetag.h"
+#include "id3v1.h"
// specs say that maximum block size is 1Mb
#define WV_BLOCK_LIMIT 1047576
#define WV_EXTRA_SIZE 12
+#define WV_START_BLOCK 0x0800
+#define WV_END_BLOCK 0x1000
+#define WV_SINGLE_BLOCK (WV_START_BLOCK | WV_END_BLOCK)
+
enum WV_FLAGS{
WV_MONO = 0x0004,
WV_HYBRID = 0x0008,
typedef struct{
uint32_t blksize, flags;
int rate, chan, bpp;
+ uint32_t chmask;
+ uint32_t samples, soff;
+ int multichannel;
int block_parsed;
uint8_t extra[WV_EXTRA_SIZE];
+ int64_t pos;
}WVContext;
static int wv_probe(AVProbeData *p)
return 0;
}
-static int wv_read_block_header(AVFormatContext *ctx, ByteIOContext *pb)
+static int wv_read_block_header(AVFormatContext *ctx, AVIOContext *pb, int append)
{
WVContext *wc = ctx->priv_data;
uint32_t tag, ver;
int size;
int rate, bpp, chan;
+ uint32_t chmask;
- tag = get_le32(pb);
- if (tag != MKTAG('w', 'v', 'p', 'k'))
- return -1;
- size = get_le32(pb);
- if(size < 24 || size > WV_BLOCK_LIMIT){
- av_log(ctx, AV_LOG_ERROR, "Incorrect block size %i\n", size);
- return -1;
- }
- wc->blksize = size;
- ver = get_le16(pb);
- if(ver < 0x402 || ver > 0x40F){
- av_log(ctx, AV_LOG_ERROR, "Unsupported version %03X\n", ver);
- return -1;
+ wc->pos = avio_tell(pb);
+ if(!append){
+ tag = avio_rl32(pb);
+ if (tag != MKTAG('w', 'v', 'p', 'k'))
+ return -1;
+ size = avio_rl32(pb);
+ if(size < 24 || size > WV_BLOCK_LIMIT){
+ av_log(ctx, AV_LOG_ERROR, "Incorrect block size %i\n", size);
+ return -1;
+ }
+ wc->blksize = size;
+ ver = avio_rl16(pb);
+ if(ver < 0x402 || ver > 0x410){
+ av_log(ctx, AV_LOG_ERROR, "Unsupported version %03X\n", ver);
+ return -1;
+ }
+ avio_r8(pb); // track no
+ avio_r8(pb); // track sub index
+ wc->samples = avio_rl32(pb); // total samples in file
+ wc->soff = avio_rl32(pb); // offset in samples of current block
+ avio_read(pb, wc->extra, WV_EXTRA_SIZE);
+ }else{
+ size = wc->blksize;
}
- get_byte(pb); // track no
- get_byte(pb); // track sub index
- get_le32(pb); // total samples in file
- get_le32(pb); // offset in samples of current block
- get_buffer(pb, wc->extra, WV_EXTRA_SIZE);
- wc->flags = LE_32(wc->extra + 4);
+ wc->flags = AV_RL32(wc->extra + 4);
+ // blocks with zero samples don't contain actual audio information and should be ignored
+ if (!AV_RN32(wc->extra))
+ return 0;
//parse flags
- if(wc->flags & WV_FLOAT){
- av_log(ctx, AV_LOG_ERROR, "Floating point data is not supported\n");
- return -1;
- }
- if(wc->flags & WV_HYBRID){
- av_log(ctx, AV_LOG_ERROR, "Hybrid coding mode is not supported\n");
- return -1;
- }
- if(wc->flags & WV_INT32){
- av_log(ctx, AV_LOG_ERROR, "Integer point data is not supported\n");
- return -1;
- }
-
bpp = ((wc->flags & 3) + 1) << 3;
chan = 1 + !(wc->flags & WV_MONO);
+ chmask = wc->flags & WV_MONO ? AV_CH_LAYOUT_MONO : AV_CH_LAYOUT_STEREO;
rate = wv_rates[(wc->flags >> 23) & 0xF];
- if(rate == -1){
- av_log(ctx, AV_LOG_ERROR, "Unknown sampling rate\n");
- return -1;
+ wc->multichannel = !!((wc->flags & WV_SINGLE_BLOCK) != WV_SINGLE_BLOCK);
+ if(wc->multichannel){
+ chan = wc->chan;
+ chmask = wc->chmask;
+ }
+ if((rate == -1 || !chan) && !wc->block_parsed){
+ int64_t block_end = avio_tell(pb) + wc->blksize - 24;
+ if(!pb->seekable){
+ av_log(ctx, AV_LOG_ERROR, "Cannot determine additional parameters\n");
+ return -1;
+ }
+ while(avio_tell(pb) < block_end){
+ int id, size;
+ id = avio_r8(pb);
+ size = (id & 0x80) ? avio_rl24(pb) : avio_r8(pb);
+ size <<= 1;
+ if(id&0x40)
+ size--;
+ switch(id&0x3F){
+ case 0xD:
+ if(size <= 1){
+ av_log(ctx, AV_LOG_ERROR, "Insufficient channel information\n");
+ return -1;
+ }
+ chan = avio_r8(pb);
+ switch(size - 2){
+ case 0:
+ chmask = avio_r8(pb);
+ break;
+ case 1:
+ chmask = avio_rl16(pb);
+ break;
+ case 2:
+ chmask = avio_rl24(pb);
+ break;
+ case 3:
+ chmask = avio_rl32(pb);
+ break;
+ case 5:
+ avio_skip(pb, 1);
+ chan |= (avio_r8(pb) & 0xF) << 8;
+ chmask = avio_rl24(pb);
+ break;
+ default:
+ av_log(ctx, AV_LOG_ERROR, "Invalid channel info size %d\n", size);
+ return -1;
+ }
+ break;
+ case 0x27:
+ rate = avio_rl24(pb);
+ break;
+ default:
+ avio_skip(pb, size);
+ }
+ if(id&0x40)
+ avio_skip(pb, 1);
+ }
+ if(rate == -1){
+ av_log(ctx, AV_LOG_ERROR, "Cannot determine custom sampling rate\n");
+ return -1;
+ }
+ avio_seek(pb, block_end - wc->blksize + 24, SEEK_SET);
}
if(!wc->bpp) wc->bpp = bpp;
if(!wc->chan) wc->chan = chan;
+ if(!wc->chmask) wc->chmask = chmask;
if(!wc->rate) wc->rate = rate;
- if(bpp != wc->bpp){
+ if(wc->flags && bpp != wc->bpp){
av_log(ctx, AV_LOG_ERROR, "Bits per sample differ, this block: %i, header block: %i\n", bpp, wc->bpp);
return -1;
}
- if(chan != wc->chan){
+ if(wc->flags && !wc->multichannel && chan != wc->chan){
av_log(ctx, AV_LOG_ERROR, "Channels differ, this block: %i, header block: %i\n", chan, wc->chan);
return -1;
}
- if(rate != wc->rate){
+ if(wc->flags && rate != -1 && rate != wc->rate){
av_log(ctx, AV_LOG_ERROR, "Sampling rate differ, this block: %i, header block: %i\n", rate, wc->rate);
return -1;
}
static int wv_read_header(AVFormatContext *s,
AVFormatParameters *ap)
{
- ByteIOContext *pb = &s->pb;
+ AVIOContext *pb = s->pb;
WVContext *wc = s->priv_data;
AVStream *st;
- if(wv_read_block_header(s, pb) < 0)
- return -1;
-
wc->block_parsed = 0;
+ for(;;){
+ if(wv_read_block_header(s, pb, 0) < 0)
+ return -1;
+ if(!AV_RN32(wc->extra))
+ avio_skip(pb, wc->blksize - 24);
+ else
+ break;
+ }
+
/* now we are ready: build format streams */
- st = av_new_stream(s, 0);
+ st = avformat_new_stream(s, NULL);
if (!st)
return -1;
- st->codec->codec_type = CODEC_TYPE_AUDIO;
+ st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
st->codec->codec_id = CODEC_ID_WAVPACK;
st->codec->channels = wc->chan;
+ st->codec->channel_layout = wc->chmask;
st->codec->sample_rate = wc->rate;
- st->codec->bits_per_sample = wc->bpp;
- av_set_pts_info(st, 64, 1, wc->rate);
+ st->codec->bits_per_coded_sample = wc->bpp;
+ avpriv_set_pts_info(st, 64, 1, wc->rate);
+ st->start_time = 0;
+ st->duration = wc->samples;
+
+ if(s->pb->seekable) {
+ int64_t cur = avio_tell(s->pb);
+ ff_ape_parse_tag(s);
+ if(!av_dict_get(s->metadata, "", NULL, AV_DICT_IGNORE_SUFFIX))
+ ff_id3v1_read(s);
+ avio_seek(s->pb, cur, SEEK_SET);
+ }
+
return 0;
}
AVPacket *pkt)
{
WVContext *wc = s->priv_data;
- int ret, samples;
+ int ret;
+ int size, ver, off;
+ int64_t pos;
- if (url_feof(&s->pb))
- return -EIO;
+ if (s->pb->eof_reached)
+ return AVERROR(EIO);
if(wc->block_parsed){
- if(wv_read_block_header(s, &s->pb) < 0)
+ if(wv_read_block_header(s, s->pb, 0) < 0)
return -1;
}
- samples = LE_32(wc->extra);
- /* should not happen but who knows */
- if(samples * 2 * wc->chan > AVCODEC_MAX_AUDIO_FRAME_SIZE){
- av_log(s, AV_LOG_ERROR, "Packet size is too big to be handled in lavc!\n");
- return -EIO;
- }
- if(av_new_packet(pkt, wc->blksize + WV_EXTRA_SIZE) < 0)
- return AVERROR_NOMEM;
- memcpy(pkt->data, wc->extra, WV_EXTRA_SIZE);
- ret = get_buffer(&s->pb, pkt->data + WV_EXTRA_SIZE, wc->blksize);
+ pos = wc->pos;
+ off = wc->multichannel ? 4 : 0;
+ if(av_new_packet(pkt, wc->blksize + WV_EXTRA_SIZE + off) < 0)
+ return AVERROR(ENOMEM);
+ if(wc->multichannel)
+ AV_WL32(pkt->data, wc->blksize + WV_EXTRA_SIZE + 12);
+ memcpy(pkt->data + off, wc->extra, WV_EXTRA_SIZE);
+ ret = avio_read(s->pb, pkt->data + WV_EXTRA_SIZE + off, wc->blksize);
if(ret != wc->blksize){
av_free_packet(pkt);
- return AVERROR_IO;
+ return AVERROR(EIO);
+ }
+ while(!(wc->flags & WV_END_BLOCK)){
+ if(avio_rl32(s->pb) != MKTAG('w', 'v', 'p', 'k')){
+ av_free_packet(pkt);
+ return -1;
+ }
+ if((ret = av_append_packet(s->pb, pkt, 4)) < 0){
+ av_free_packet(pkt);
+ return ret;
+ }
+ size = AV_RL32(pkt->data + pkt->size - 4);
+ if(size < 24 || size > WV_BLOCK_LIMIT){
+ av_free_packet(pkt);
+ av_log(s, AV_LOG_ERROR, "Incorrect block size %d\n", size);
+ return -1;
+ }
+ wc->blksize = size;
+ ver = avio_rl16(s->pb);
+ if(ver < 0x402 || ver > 0x410){
+ av_free_packet(pkt);
+ av_log(s, AV_LOG_ERROR, "Unsupported version %03X\n", ver);
+ return -1;
+ }
+ avio_r8(s->pb); // track no
+ avio_r8(s->pb); // track sub index
+ wc->samples = avio_rl32(s->pb); // total samples in file
+ wc->soff = avio_rl32(s->pb); // offset in samples of current block
+ if((ret = av_append_packet(s->pb, pkt, WV_EXTRA_SIZE)) < 0){
+ av_free_packet(pkt);
+ return ret;
+ }
+ memcpy(wc->extra, pkt->data + pkt->size - WV_EXTRA_SIZE, WV_EXTRA_SIZE);
+
+ if(wv_read_block_header(s, s->pb, 1) < 0){
+ av_free_packet(pkt);
+ return -1;
+ }
+ ret = av_append_packet(s->pb, pkt, wc->blksize);
+ if(ret < 0){
+ av_free_packet(pkt);
+ return ret;
+ }
}
pkt->stream_index = 0;
wc->block_parsed = 1;
- pkt->size = ret + WV_EXTRA_SIZE;
-
+ pkt->pts = wc->soff;
+ av_add_index_entry(s->streams[0], pos, pkt->pts, 0, 0, AVINDEX_KEYFRAME);
return 0;
}
-static int wv_read_close(AVFormatContext *s)
+static int wv_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
{
+ AVStream *st = s->streams[stream_index];
+ WVContext *wc = s->priv_data;
+ AVPacket pkt1, *pkt = &pkt1;
+ int ret;
+ int index = av_index_search_timestamp(st, timestamp, flags);
+ int64_t pos, pts;
+
+ /* if found, seek there */
+ if (index >= 0 &&
+ timestamp <= st->index_entries[st->nb_index_entries - 1].timestamp) {
+ wc->block_parsed = 1;
+ avio_seek(s->pb, st->index_entries[index].pos, SEEK_SET);
+ return 0;
+ }
+ /* if timestamp is out of bounds, return error */
+ if(timestamp < 0 || timestamp >= s->duration)
+ return -1;
+
+ pos = avio_tell(s->pb);
+ do{
+ ret = av_read_frame(s, pkt);
+ if (ret < 0){
+ avio_seek(s->pb, pos, SEEK_SET);
+ return -1;
+ }
+ pts = pkt->pts;
+ av_free_packet(pkt);
+ }while(pts < timestamp);
return 0;
}
-AVInputFormat wv_demuxer = {
- "wv",
- "WavPack",
- sizeof(WVContext),
- wv_probe,
- wv_read_header,
- wv_read_packet,
- wv_read_close,
- pcm_read_seek,
+AVInputFormat ff_wv_demuxer = {
+ .name = "wv",
+ .long_name = NULL_IF_CONFIG_SMALL("WavPack"),
+ .priv_data_size = sizeof(WVContext),
+ .read_probe = wv_probe,
+ .read_header = wv_read_header,
+ .read_packet = wv_read_packet,
+ .read_seek = wv_read_seek,
};
projects / ffmpeg / blobdiff