3 * Copyright (c) 2006 Konstantin Shishkov.
5 * This file is part of FFmpeg.
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
23 #include "allformats.h"
26 // specs say that maximum block size is 1Mb
27 #define WV_BLOCK_LIMIT 1047576
29 #define WV_EXTRA_SIZE 12
45 static const int wv_rates[16] = {
46 6000, 8000, 9600, 11025, 12000, 16000, 22050, 24000,
47 32000, 44100, 48000, 64000, 88200, 96000, 192000, -1
51 uint32_t blksize, flags;
54 uint8_t extra[WV_EXTRA_SIZE];
57 static int wv_probe(AVProbeData *p)
59 /* check file header */
60 if (p->buf_size <= 32)
62 if (p->buf[0] == 'w' && p->buf[1] == 'v' &&
63 p->buf[2] == 'p' && p->buf[3] == 'k')
64 return AVPROBE_SCORE_MAX;
69 static int wv_read_block_header(AVFormatContext *ctx, ByteIOContext *pb)
71 WVContext *wc = ctx->priv_data;
77 if (tag != MKTAG('w', 'v', 'p', 'k'))
80 if(size < 24 || size > WV_BLOCK_LIMIT){
81 av_log(ctx, AV_LOG_ERROR, "Incorrect block size %i\n", size);
86 if(ver < 0x402 || ver > 0x40F){
87 av_log(ctx, AV_LOG_ERROR, "Unsupported version %03X\n", ver);
90 get_byte(pb); // track no
91 get_byte(pb); // track sub index
92 get_le32(pb); // total samples in file
93 get_le32(pb); // offset in samples of current block
94 get_buffer(pb, wc->extra, WV_EXTRA_SIZE);
95 wc->flags = LE_32(wc->extra + 4);
97 if(wc->flags & WV_FLOAT){
98 av_log(ctx, AV_LOG_ERROR, "Floating point data is not supported\n");
101 if(wc->flags & WV_HYBRID){
102 av_log(ctx, AV_LOG_ERROR, "Hybrid coding mode is not supported\n");
105 if(wc->flags & WV_INT32){
106 av_log(ctx, AV_LOG_ERROR, "Integer point data is not supported\n");
110 bpp = ((wc->flags & 3) + 1) << 3;
111 chan = 1 + !(wc->flags & WV_MONO);
112 rate = wv_rates[(wc->flags >> 23) & 0xF];
114 av_log(ctx, AV_LOG_ERROR, "Unknown sampling rate\n");
117 if(!wc->bpp) wc->bpp = bpp;
118 if(!wc->chan) wc->chan = chan;
119 if(!wc->rate) wc->rate = rate;
121 if(wc->flags && bpp != wc->bpp){
122 av_log(ctx, AV_LOG_ERROR, "Bits per sample differ, this block: %i, header block: %i\n", bpp, wc->bpp);
125 if(wc->flags && chan != wc->chan){
126 av_log(ctx, AV_LOG_ERROR, "Channels differ, this block: %i, header block: %i\n", chan, wc->chan);
129 if(wc->flags && rate != wc->rate){
130 av_log(ctx, AV_LOG_ERROR, "Sampling rate differ, this block: %i, header block: %i\n", rate, wc->rate);
133 wc->blksize = size - 24;
137 static int wv_read_header(AVFormatContext *s,
138 AVFormatParameters *ap)
140 ByteIOContext *pb = &s->pb;
141 WVContext *wc = s->priv_data;
144 if(wv_read_block_header(s, pb) < 0)
147 wc->block_parsed = 0;
148 /* now we are ready: build format streams */
149 st = av_new_stream(s, 0);
152 st->codec->codec_type = CODEC_TYPE_AUDIO;
153 st->codec->codec_id = CODEC_ID_WAVPACK;
154 st->codec->channels = wc->chan;
155 st->codec->sample_rate = wc->rate;
156 st->codec->bits_per_sample = wc->bpp;
157 av_set_pts_info(st, 64, 1, wc->rate);
161 static int wv_read_packet(AVFormatContext *s,
164 WVContext *wc = s->priv_data;
167 if (url_feof(&s->pb))
169 if(wc->block_parsed){
170 if(wv_read_block_header(s, &s->pb) < 0)
174 if(av_new_packet(pkt, wc->blksize + WV_EXTRA_SIZE) < 0)
175 return AVERROR_NOMEM;
176 memcpy(pkt->data, wc->extra, WV_EXTRA_SIZE);
177 ret = get_buffer(&s->pb, pkt->data + WV_EXTRA_SIZE, wc->blksize);
178 if(ret != wc->blksize){
182 pkt->stream_index = 0;
183 wc->block_parsed = 1;
184 pkt->size = ret + WV_EXTRA_SIZE;
189 static int wv_read_close(AVFormatContext *s)
194 AVInputFormat wv_demuxer = {