3 * Copyright (c) 2006,2011 Konstantin Shishkov
5 * This file is part of Libav.
7 * Libav 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 * Libav 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 Libav; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22 #include "libavutil/audioconvert.h"
23 #include "libavutil/intreadwrite.h"
24 #include "libavutil/dict.h"
30 // specs say that maximum block size is 1Mb
31 #define WV_BLOCK_LIMIT 1047576
33 #define WV_EXTRA_SIZE 12
35 #define WV_START_BLOCK 0x0800
36 #define WV_END_BLOCK 0x1000
37 #define WV_SINGLE_BLOCK (WV_START_BLOCK | WV_END_BLOCK)
53 static const int wv_rates[16] = {
54 6000, 8000, 9600, 11025, 12000, 16000, 22050, 24000,
55 32000, 44100, 48000, 64000, 88200, 96000, 192000, -1
59 uint32_t blksize, flags;
62 uint32_t samples, soff;
65 uint8_t extra[WV_EXTRA_SIZE];
71 static int wv_probe(AVProbeData *p)
73 /* check file header */
74 if (p->buf_size <= 32)
76 if (p->buf[0] == 'w' && p->buf[1] == 'v' &&
77 p->buf[2] == 'p' && p->buf[3] == 'k')
78 return AVPROBE_SCORE_MAX;
83 static int wv_read_block_header(AVFormatContext *ctx, AVIOContext *pb,
86 WVContext *wc = ctx->priv_data;
92 wc->pos = avio_tell(pb);
94 /* don't return bogus packets with the ape tag data */
95 if (wc->apetag_start && wc->pos >= wc->apetag_start)
100 if (tag != MKTAG('w', 'v', 'p', 'k'))
101 return AVERROR_INVALIDDATA;
102 size = avio_rl32(pb);
103 if (size < 24 || size > WV_BLOCK_LIMIT) {
104 av_log(ctx, AV_LOG_ERROR, "Incorrect block size %i\n", size);
105 return AVERROR_INVALIDDATA;
109 if (ver < 0x402 || ver > 0x410) {
110 av_log(ctx, AV_LOG_ERROR, "Unsupported version %03X\n", ver);
111 return AVERROR_PATCHWELCOME;
113 avio_r8(pb); // track no
114 avio_r8(pb); // track sub index
115 wc->samples = avio_rl32(pb); // total samples in file
116 wc->soff = avio_rl32(pb); // offset in samples of current block
117 avio_read(pb, wc->extra, WV_EXTRA_SIZE);
121 wc->flags = AV_RL32(wc->extra + 4);
122 /* Blocks with zero samples don't contain actual audio information
123 * and should be ignored */
124 if (!AV_RN32(wc->extra))
127 bpp = ((wc->flags & 3) + 1) << 3;
128 chan = 1 + !(wc->flags & WV_MONO);
129 chmask = wc->flags & WV_MONO ? AV_CH_LAYOUT_MONO : AV_CH_LAYOUT_STEREO;
130 rate = wv_rates[(wc->flags >> 23) & 0xF];
131 wc->multichannel = !!((wc->flags & WV_SINGLE_BLOCK) != WV_SINGLE_BLOCK);
132 if (wc->multichannel) {
136 if ((rate == -1 || !chan) && !wc->block_parsed) {
137 int64_t block_end = avio_tell(pb) + wc->blksize - 24;
139 av_log(ctx, AV_LOG_ERROR,
140 "Cannot determine additional parameters\n");
141 return AVERROR_INVALIDDATA;
143 while (avio_tell(pb) < block_end) {
146 size = (id & 0x80) ? avio_rl24(pb) : avio_r8(pb);
153 av_log(ctx, AV_LOG_ERROR,
154 "Insufficient channel information\n");
155 return AVERROR_INVALIDDATA;
160 chmask = avio_r8(pb);
163 chmask = avio_rl16(pb);
166 chmask = avio_rl24(pb);
169 chmask = avio_rl32(pb);
173 chan |= (avio_r8(pb) & 0xF) << 8;
174 chmask = avio_rl24(pb);
177 av_log(ctx, AV_LOG_ERROR,
178 "Invalid channel info size %d\n", size);
179 return AVERROR_INVALIDDATA;
183 rate = avio_rl24(pb);
192 av_log(ctx, AV_LOG_ERROR,
193 "Cannot determine custom sampling rate\n");
194 return AVERROR_INVALIDDATA;
196 avio_seek(pb, block_end - wc->blksize + 24, SEEK_SET);
207 if (wc->flags && bpp != wc->bpp) {
208 av_log(ctx, AV_LOG_ERROR,
209 "Bits per sample differ, this block: %i, header block: %i\n",
211 return AVERROR_INVALIDDATA;
213 if (wc->flags && !wc->multichannel && chan != wc->chan) {
214 av_log(ctx, AV_LOG_ERROR,
215 "Channels differ, this block: %i, header block: %i\n",
217 return AVERROR_INVALIDDATA;
219 if (wc->flags && rate != -1 && rate != wc->rate) {
220 av_log(ctx, AV_LOG_ERROR,
221 "Sampling rate differ, this block: %i, header block: %i\n",
223 return AVERROR_INVALIDDATA;
225 wc->blksize = size - 24;
229 static int wv_read_header(AVFormatContext *s)
231 AVIOContext *pb = s->pb;
232 WVContext *wc = s->priv_data;
236 wc->block_parsed = 0;
238 if ((ret = wv_read_block_header(s, pb, 0)) < 0)
240 if (!AV_RN32(wc->extra))
241 avio_skip(pb, wc->blksize - 24);
246 /* now we are ready: build format streams */
247 st = avformat_new_stream(s, NULL);
249 return AVERROR(ENOMEM);
250 st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
251 st->codec->codec_id = AV_CODEC_ID_WAVPACK;
252 st->codec->channels = wc->chan;
253 st->codec->channel_layout = wc->chmask;
254 st->codec->sample_rate = wc->rate;
255 st->codec->bits_per_coded_sample = wc->bpp;
256 avpriv_set_pts_info(st, 64, 1, wc->rate);
258 st->duration = wc->samples;
260 if (s->pb->seekable) {
261 int64_t cur = avio_tell(s->pb);
262 wc->apetag_start = ff_ape_parse_tag(s);
263 if (!av_dict_get(s->metadata, "", NULL, AV_DICT_IGNORE_SUFFIX))
265 avio_seek(s->pb, cur, SEEK_SET);
271 static int wv_read_packet(AVFormatContext *s, AVPacket *pkt)
273 WVContext *wc = s->priv_data;
277 uint32_t block_samples;
279 if (s->pb->eof_reached)
281 if (wc->block_parsed) {
282 if ((ret = wv_read_block_header(s, s->pb, 0)) < 0)
287 off = wc->multichannel ? 4 : 0;
288 if (av_new_packet(pkt, wc->blksize + WV_EXTRA_SIZE + off) < 0)
289 return AVERROR(ENOMEM);
290 if (wc->multichannel)
291 AV_WL32(pkt->data, wc->blksize + WV_EXTRA_SIZE + 12);
292 memcpy(pkt->data + off, wc->extra, WV_EXTRA_SIZE);
293 ret = avio_read(s->pb, pkt->data + WV_EXTRA_SIZE + off, wc->blksize);
294 if (ret != wc->blksize) {
298 while (!(wc->flags & WV_END_BLOCK)) {
299 if (avio_rl32(s->pb) != MKTAG('w', 'v', 'p', 'k')) {
301 return AVERROR_INVALIDDATA;
303 if ((ret = av_append_packet(s->pb, pkt, 4)) < 0) {
307 size = AV_RL32(pkt->data + pkt->size - 4);
308 if (size < 24 || size > WV_BLOCK_LIMIT) {
310 av_log(s, AV_LOG_ERROR, "Incorrect block size %d\n", size);
311 return AVERROR_INVALIDDATA;
314 ver = avio_rl16(s->pb);
315 if (ver < 0x402 || ver > 0x410) {
317 av_log(s, AV_LOG_ERROR, "Unsupported version %03X\n", ver);
318 return AVERROR_PATCHWELCOME;
320 avio_r8(s->pb); // track no
321 avio_r8(s->pb); // track sub index
322 wc->samples = avio_rl32(s->pb); // total samples in file
323 wc->soff = avio_rl32(s->pb); // offset in samples of current block
324 if ((ret = av_append_packet(s->pb, pkt, WV_EXTRA_SIZE)) < 0) {
328 memcpy(wc->extra, pkt->data + pkt->size - WV_EXTRA_SIZE, WV_EXTRA_SIZE);
330 if ((ret = wv_read_block_header(s, s->pb, 1)) < 0) {
334 ret = av_append_packet(s->pb, pkt, wc->blksize);
340 pkt->stream_index = 0;
341 wc->block_parsed = 1;
343 block_samples = AV_RN32(wc->extra);
344 if (block_samples > INT32_MAX)
345 av_log(s, AV_LOG_WARNING,
346 "Too many samples in block: %"PRIu32"\n", block_samples);
348 pkt->duration = block_samples;
350 av_add_index_entry(s->streams[0], pos, pkt->pts, 0, 0, AVINDEX_KEYFRAME);
354 static int wv_read_seek(AVFormatContext *s, int stream_index,
355 int64_t timestamp, int flags)
357 AVStream *st = s->streams[stream_index];
358 WVContext *wc = s->priv_data;
359 AVPacket pkt1, *pkt = &pkt1;
361 int index = av_index_search_timestamp(st, timestamp, flags);
364 /* if found, seek there */
366 timestamp <= st->index_entries[st->nb_index_entries - 1].timestamp) {
367 wc->block_parsed = 1;
368 avio_seek(s->pb, st->index_entries[index].pos, SEEK_SET);
371 /* if timestamp is out of bounds, return error */
372 if (timestamp < 0 || timestamp >= s->duration)
373 return AVERROR(EINVAL);
375 pos = avio_tell(s->pb);
377 ret = av_read_frame(s, pkt);
379 avio_seek(s->pb, pos, SEEK_SET);
384 } while(pts < timestamp);
388 AVInputFormat ff_wv_demuxer = {
390 .long_name = NULL_IF_CONFIG_SMALL("WavPack"),
391 .priv_data_size = sizeof(WVContext),
392 .read_probe = wv_probe,
393 .read_header = wv_read_header,
394 .read_packet = wv_read_packet,
395 .read_seek = wv_read_seek,