3 * Copyright (c) 2006,2011 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
22 #include "libavutil/channel_layout.h"
23 #include "libavutil/intreadwrite.h"
24 #include "libavutil/dict.h"
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 uint8_t block_header[WV_HEADER_SIZE];
62 static int wv_probe(AVProbeData *p)
64 /* check file header */
65 if (p->buf_size <= 32)
67 if (AV_RL32(&p->buf[0]) == MKTAG('w', 'v', 'p', 'k') &&
68 AV_RL32(&p->buf[4]) >= 24 &&
69 AV_RL32(&p->buf[4]) <= WV_BLOCK_LIMIT &&
70 AV_RL16(&p->buf[8]) >= 0x402 &&
71 AV_RL16(&p->buf[8]) <= 0x410)
72 return AVPROBE_SCORE_MAX;
77 static int wv_read_block_header(AVFormatContext *ctx, AVIOContext *pb)
79 WVContext *wc = ctx->priv_data;
82 uint32_t chmask, flags;
84 wc->pos = avio_tell(pb);
86 /* don't return bogus packets with the ape tag data */
87 if (wc->apetag_start && wc->pos >= wc->apetag_start)
90 ret = avio_read(pb, wc->block_header, WV_HEADER_SIZE);
91 if (ret != WV_HEADER_SIZE)
92 return (ret < 0) ? ret : AVERROR_EOF;
94 ret = ff_wv_parse_header(&wc->header, wc->block_header);
96 av_log(ctx, AV_LOG_ERROR, "Invalid block header.\n");
100 if (wc->header.version < 0x402 || wc->header.version > 0x410) {
101 av_log(ctx, AV_LOG_ERROR, "Unsupported version %03X\n", wc->header.version);
102 return AVERROR_PATCHWELCOME;
105 /* Blocks with zero samples don't contain actual audio information
106 * and should be ignored */
107 if (!wc->header.samples)
110 flags = wc->header.flags;
111 bpp = ((flags & 3) + 1) << 3;
112 chan = 1 + !(flags & WV_MONO);
113 chmask = flags & WV_MONO ? AV_CH_LAYOUT_MONO : AV_CH_LAYOUT_STEREO;
114 rate = wv_rates[(flags >> 23) & 0xF];
115 wc->multichannel = !(wc->header.initial && wc->header.final);
116 if (wc->multichannel) {
120 if ((rate == -1 || !chan) && !wc->block_parsed) {
121 int64_t block_end = avio_tell(pb) + wc->header.blocksize;
123 av_log(ctx, AV_LOG_ERROR,
124 "Cannot determine additional parameters\n");
125 return AVERROR_INVALIDDATA;
127 while (avio_tell(pb) < block_end) {
130 size = (id & 0x80) ? avio_rl24(pb) : avio_r8(pb);
137 av_log(ctx, AV_LOG_ERROR,
138 "Insufficient channel information\n");
139 return AVERROR_INVALIDDATA;
144 chmask = avio_r8(pb);
147 chmask = avio_rl16(pb);
150 chmask = avio_rl24(pb);
153 chmask = avio_rl32(pb);
157 chan |= (avio_r8(pb) & 0xF) << 8;
158 chmask = avio_rl24(pb);
161 av_log(ctx, AV_LOG_ERROR,
162 "Invalid channel info size %d\n", size);
163 return AVERROR_INVALIDDATA;
167 rate = avio_rl24(pb);
176 av_log(ctx, AV_LOG_ERROR,
177 "Cannot determine custom sampling rate\n");
178 return AVERROR_INVALIDDATA;
180 avio_seek(pb, block_end - wc->header.blocksize, SEEK_SET);
191 if (flags && bpp != wc->bpp) {
192 av_log(ctx, AV_LOG_ERROR,
193 "Bits per sample differ, this block: %i, header block: %i\n",
195 return AVERROR_INVALIDDATA;
197 if (flags && !wc->multichannel && chan != wc->chan) {
198 av_log(ctx, AV_LOG_ERROR,
199 "Channels differ, this block: %i, header block: %i\n",
201 return AVERROR_INVALIDDATA;
203 if (flags && rate != -1 && rate != wc->rate) {
204 av_log(ctx, AV_LOG_ERROR,
205 "Sampling rate differ, this block: %i, header block: %i\n",
207 return AVERROR_INVALIDDATA;
212 static int wv_read_header(AVFormatContext *s)
214 AVIOContext *pb = s->pb;
215 WVContext *wc = s->priv_data;
219 wc->block_parsed = 0;
221 if ((ret = wv_read_block_header(s, pb)) < 0)
223 if (!wc->header.samples)
224 avio_skip(pb, wc->header.blocksize);
229 /* now we are ready: build format streams */
230 st = avformat_new_stream(s, NULL);
232 return AVERROR(ENOMEM);
233 st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
234 st->codec->codec_id = AV_CODEC_ID_WAVPACK;
235 st->codec->channels = wc->chan;
236 st->codec->channel_layout = wc->chmask;
237 st->codec->sample_rate = wc->rate;
238 st->codec->bits_per_coded_sample = wc->bpp;
239 avpriv_set_pts_info(st, 64, 1, wc->rate);
241 if (wc->header.total_samples != 0xFFFFFFFFu)
242 st->duration = wc->header.total_samples;
244 if (s->pb->seekable) {
245 int64_t cur = avio_tell(s->pb);
246 wc->apetag_start = ff_ape_parse_tag(s);
247 if (!av_dict_get(s->metadata, "", NULL, AV_DICT_IGNORE_SUFFIX))
249 avio_seek(s->pb, cur, SEEK_SET);
255 static int wv_read_packet(AVFormatContext *s, AVPacket *pkt)
257 WVContext *wc = s->priv_data;
261 uint32_t block_samples;
265 if (wc->block_parsed) {
266 if ((ret = wv_read_block_header(s, s->pb)) < 0)
271 if (av_new_packet(pkt, wc->header.blocksize + WV_HEADER_SIZE) < 0)
272 return AVERROR(ENOMEM);
273 memcpy(pkt->data, wc->block_header, WV_HEADER_SIZE);
274 ret = avio_read(s->pb, pkt->data + WV_HEADER_SIZE, wc->header.blocksize);
275 if (ret != wc->header.blocksize) {
279 while (!(wc->header.flags & WV_FLAG_FINAL_BLOCK)) {
280 if ((ret = wv_read_block_header(s, s->pb)) < 0) {
286 if ((ret = av_grow_packet(pkt, WV_HEADER_SIZE + wc->header.blocksize)) < 0) {
290 memcpy(pkt->data + off, wc->block_header, WV_HEADER_SIZE);
292 ret = avio_read(s->pb, pkt->data + off + WV_HEADER_SIZE, wc->header.blocksize);
293 if (ret != wc->header.blocksize) {
295 return (ret < 0) ? ret : AVERROR_EOF;
298 pkt->stream_index = 0;
299 wc->block_parsed = 1;
300 pkt->pts = wc->header.block_idx;
301 block_samples = wc->header.samples;
302 if (block_samples > INT32_MAX)
303 av_log(s, AV_LOG_WARNING,
304 "Too many samples in block: %"PRIu32"\n", block_samples);
306 pkt->duration = block_samples;
308 av_add_index_entry(s->streams[0], pos, pkt->pts, 0, 0, AVINDEX_KEYFRAME);
312 static int wv_read_seek(AVFormatContext *s, int stream_index,
313 int64_t timestamp, int flags)
315 AVStream *st = s->streams[stream_index];
316 WVContext *wc = s->priv_data;
317 AVPacket pkt1, *pkt = &pkt1;
319 int index = av_index_search_timestamp(st, timestamp, flags);
322 /* if found, seek there */
324 timestamp <= st->index_entries[st->nb_index_entries - 1].timestamp) {
325 wc->block_parsed = 1;
326 avio_seek(s->pb, st->index_entries[index].pos, SEEK_SET);
329 /* if timestamp is out of bounds, return error */
330 if (timestamp < 0 || timestamp >= s->duration)
331 return AVERROR(EINVAL);
333 pos = avio_tell(s->pb);
335 ret = av_read_frame(s, pkt);
337 avio_seek(s->pb, pos, SEEK_SET);
342 } while(pts < timestamp);
346 AVInputFormat ff_wv_demuxer = {
348 .long_name = NULL_IF_CONFIG_SMALL("WavPack"),
349 .priv_data_size = sizeof(WVContext),
350 .read_probe = wv_probe,
351 .read_header = wv_read_header,
352 .read_packet = wv_read_packet,
353 .read_seek = wv_read_seek,