mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-12-02 03:06:28 +02:00
0fecf2642b
Conflicts: Changelog doc/APIchanges doc/optimization.txt libavformat/avio.h Merged-by: Michael Niedermayer <michaelni@gmx.at>
353 lines
10 KiB
C
353 lines
10 KiB
C
/*
|
|
* WavPack demuxer
|
|
* Copyright (c) 2006,2011 Konstantin Shishkov
|
|
*
|
|
* 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 "libavutil/audioconvert.h"
|
|
#include "libavutil/intreadwrite.h"
|
|
#include "avformat.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,
|
|
WV_JOINT = 0x0010,
|
|
WV_CROSSD = 0x0020,
|
|
WV_HSHAPE = 0x0040,
|
|
WV_FLOAT = 0x0080,
|
|
WV_INT32 = 0x0100,
|
|
WV_HBR = 0x0200,
|
|
WV_HBAL = 0x0400,
|
|
WV_MCINIT = 0x0800,
|
|
WV_MCEND = 0x1000,
|
|
};
|
|
|
|
static const int wv_rates[16] = {
|
|
6000, 8000, 9600, 11025, 12000, 16000, 22050, 24000,
|
|
32000, 44100, 48000, 64000, 88200, 96000, 192000, -1
|
|
};
|
|
|
|
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)
|
|
{
|
|
/* check file header */
|
|
if (p->buf_size <= 32)
|
|
return 0;
|
|
if (p->buf[0] == 'w' && p->buf[1] == 'v' &&
|
|
p->buf[2] == 'p' && p->buf[3] == 'k')
|
|
return AVPROBE_SCORE_MAX;
|
|
else
|
|
return 0;
|
|
}
|
|
|
|
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;
|
|
|
|
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;
|
|
}
|
|
wc->flags = AV_RL32(wc->extra + 4);
|
|
//parse flags
|
|
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];
|
|
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(url_is_streamed(pb)){
|
|
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(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(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(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;
|
|
}
|
|
wc->blksize = size - 24;
|
|
return 0;
|
|
}
|
|
|
|
static int wv_read_header(AVFormatContext *s,
|
|
AVFormatParameters *ap)
|
|
{
|
|
AVIOContext *pb = s->pb;
|
|
WVContext *wc = s->priv_data;
|
|
AVStream *st;
|
|
|
|
wc->block_parsed = 0;
|
|
if(wv_read_block_header(s, pb, 0) < 0)
|
|
return -1;
|
|
|
|
/* now we are ready: build format streams */
|
|
st = av_new_stream(s, 0);
|
|
if (!st)
|
|
return -1;
|
|
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_coded_sample = wc->bpp;
|
|
av_set_pts_info(st, 64, 1, wc->rate);
|
|
st->start_time = 0;
|
|
st->duration = wc->samples;
|
|
|
|
if(!url_is_streamed(s->pb)) {
|
|
int64_t cur = avio_tell(s->pb);
|
|
ff_ape_parse_tag(s);
|
|
if(!av_metadata_get(s->metadata, "", NULL, AV_METADATA_IGNORE_SUFFIX))
|
|
ff_id3v1_read(s);
|
|
avio_seek(s->pb, cur, SEEK_SET);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int wv_read_packet(AVFormatContext *s,
|
|
AVPacket *pkt)
|
|
{
|
|
WVContext *wc = s->priv_data;
|
|
int ret;
|
|
int size, ver, off;
|
|
|
|
if (url_feof(s->pb))
|
|
return AVERROR(EIO);
|
|
if(wc->block_parsed){
|
|
if(wv_read_block_header(s, s->pb, 0) < 0)
|
|
return -1;
|
|
}
|
|
|
|
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(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->pts = wc->soff;
|
|
av_add_index_entry(s->streams[0], wc->pos, pkt->pts, 0, 0, AVINDEX_KEYFRAME);
|
|
return 0;
|
|
}
|
|
|
|
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){
|
|
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 ff_wv_demuxer = {
|
|
"wv",
|
|
NULL_IF_CONFIG_SMALL("WavPack"),
|
|
sizeof(WVContext),
|
|
wv_probe,
|
|
wv_read_header,
|
|
wv_read_packet,
|
|
NULL,
|
|
wv_read_seek,
|
|
};
|