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"
46 static const int wv_rates[16] = {
47 6000, 8000, 9600, 11025, 12000, 16000, 22050, 24000,
48 32000, 44100, 48000, 64000, 88200, 96000, 192000, -1
51 typedef struct WVContext {
52 uint8_t block_header[WV_HEADER_SIZE];
63 static int wv_probe(const AVProbeData *p)
65 /* check file header */
66 if (p->buf_size <= 32)
68 if (AV_RL32(&p->buf[0]) == MKTAG('w', 'v', 'p', 'k') &&
69 AV_RL32(&p->buf[4]) >= 24 &&
70 AV_RL32(&p->buf[4]) <= WV_BLOCK_LIMIT &&
71 AV_RL16(&p->buf[8]) >= 0x402 &&
72 AV_RL16(&p->buf[8]) <= 0x410)
73 return AVPROBE_SCORE_MAX;
78 static int wv_read_block_header(AVFormatContext *ctx, AVIOContext *pb)
80 WVContext *wc = ctx->priv_data;
83 uint32_t chmask, flags;
85 wc->pos = avio_tell(pb);
87 /* don't return bogus packets with the ape tag data */
88 if (wc->apetag_start && wc->pos >= wc->apetag_start)
91 ret = avio_read(pb, wc->block_header, WV_HEADER_SIZE);
92 if (ret != WV_HEADER_SIZE)
93 return (ret < 0) ? ret : AVERROR_EOF;
95 ret = ff_wv_parse_header(&wc->header, wc->block_header);
97 av_log(ctx, AV_LOG_ERROR, "Invalid block header.\n");
101 if (wc->header.flags & WV_DSD) {
102 avpriv_report_missing_feature(ctx, "WV DSD");
103 return AVERROR_PATCHWELCOME;
106 if (wc->header.version < 0x402 || wc->header.version > 0x410) {
107 avpriv_report_missing_feature(ctx, "WV version 0x%03X",
109 return AVERROR_PATCHWELCOME;
112 /* Blocks with zero samples don't contain actual audio information
113 * and should be ignored */
114 if (!wc->header.samples)
117 flags = wc->header.flags;
118 bpp = ((flags & 3) + 1) << 3;
119 chan = 1 + !(flags & WV_MONO);
120 chmask = flags & WV_MONO ? AV_CH_LAYOUT_MONO : AV_CH_LAYOUT_STEREO;
121 rate = wv_rates[(flags >> 23) & 0xF];
122 wc->multichannel = !(wc->header.initial && wc->header.final);
123 if (wc->multichannel) {
127 if ((rate == -1 || !chan) && !wc->block_parsed) {
128 int64_t block_end = avio_tell(pb) + wc->header.blocksize;
129 if (!(pb->seekable & AVIO_SEEKABLE_NORMAL)) {
130 av_log(ctx, AV_LOG_ERROR,
131 "Cannot determine additional parameters\n");
132 return AVERROR_INVALIDDATA;
134 while (avio_tell(pb) < block_end && !avio_feof(pb)) {
137 size = (id & 0x80) ? avio_rl24(pb) : avio_r8(pb);
144 av_log(ctx, AV_LOG_ERROR,
145 "Insufficient channel information\n");
146 return AVERROR_INVALIDDATA;
151 chmask = avio_r8(pb);
154 chmask = avio_rl16(pb);
157 chmask = avio_rl24(pb);
160 chmask = avio_rl32(pb);
164 chan |= (avio_r8(pb) & 0xF) << 8;
166 chmask = avio_rl24(pb);
170 chan |= (avio_r8(pb) & 0xF) << 8;
172 chmask = avio_rl32(pb);
175 av_log(ctx, AV_LOG_ERROR,
176 "Invalid channel info size %d\n", size);
177 return AVERROR_INVALIDDATA;
181 rate = avio_rl24(pb);
190 av_log(ctx, AV_LOG_ERROR,
191 "Cannot determine custom sampling rate\n");
192 return AVERROR_INVALIDDATA;
194 avio_seek(pb, block_end - wc->header.blocksize, SEEK_SET);
205 if (flags && bpp != wc->bpp) {
206 av_log(ctx, AV_LOG_ERROR,
207 "Bits per sample differ, this block: %i, header block: %i\n",
209 return AVERROR_INVALIDDATA;
211 if (flags && !wc->multichannel && chan != wc->chan) {
212 av_log(ctx, AV_LOG_ERROR,
213 "Channels differ, this block: %i, header block: %i\n",
215 return AVERROR_INVALIDDATA;
217 if (flags && rate != -1 && rate != wc->rate) {
218 av_log(ctx, AV_LOG_ERROR,
219 "Sampling rate differ, this block: %i, header block: %i\n",
221 return AVERROR_INVALIDDATA;
226 static int wv_read_header(AVFormatContext *s)
228 AVIOContext *pb = s->pb;
229 WVContext *wc = s->priv_data;
233 wc->block_parsed = 0;
235 if ((ret = wv_read_block_header(s, pb)) < 0)
237 if (!wc->header.samples)
238 avio_skip(pb, wc->header.blocksize);
243 /* now we are ready: build format streams */
244 st = avformat_new_stream(s, NULL);
246 return AVERROR(ENOMEM);
247 st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
248 st->codecpar->codec_id = AV_CODEC_ID_WAVPACK;
249 st->codecpar->channels = wc->chan;
250 st->codecpar->channel_layout = wc->chmask;
251 st->codecpar->sample_rate = wc->rate;
252 st->codecpar->bits_per_coded_sample = wc->bpp;
253 avpriv_set_pts_info(st, 64, 1, wc->rate);
255 if (wc->header.total_samples != 0xFFFFFFFFu)
256 st->duration = wc->header.total_samples;
258 if (s->pb->seekable & AVIO_SEEKABLE_NORMAL) {
259 int64_t cur = avio_tell(s->pb);
260 wc->apetag_start = ff_ape_parse_tag(s);
261 if (!av_dict_get(s->metadata, "", NULL, AV_DICT_IGNORE_SUFFIX))
263 avio_seek(s->pb, cur, SEEK_SET);
269 static int wv_read_packet(AVFormatContext *s, AVPacket *pkt)
271 WVContext *wc = s->priv_data;
275 uint32_t block_samples;
277 if (avio_feof(s->pb))
279 if (wc->block_parsed) {
280 if ((ret = wv_read_block_header(s, s->pb)) < 0)
285 if (av_new_packet(pkt, wc->header.blocksize + WV_HEADER_SIZE) < 0)
286 return AVERROR(ENOMEM);
287 memcpy(pkt->data, wc->block_header, WV_HEADER_SIZE);
288 ret = avio_read(s->pb, pkt->data + WV_HEADER_SIZE, wc->header.blocksize);
289 if (ret != wc->header.blocksize) {
290 av_packet_unref(pkt);
293 while (!(wc->header.flags & WV_FLAG_FINAL_BLOCK)) {
294 if ((ret = wv_read_block_header(s, s->pb)) < 0) {
295 av_packet_unref(pkt);
300 if ((ret = av_grow_packet(pkt, WV_HEADER_SIZE + wc->header.blocksize)) < 0) {
301 av_packet_unref(pkt);
304 memcpy(pkt->data + off, wc->block_header, WV_HEADER_SIZE);
306 ret = avio_read(s->pb, pkt->data + off + WV_HEADER_SIZE, wc->header.blocksize);
307 if (ret != wc->header.blocksize) {
308 av_packet_unref(pkt);
309 return (ret < 0) ? ret : AVERROR_EOF;
312 pkt->stream_index = 0;
314 wc->block_parsed = 1;
315 pkt->pts = wc->header.block_idx;
316 block_samples = wc->header.samples;
317 if (block_samples > INT32_MAX)
318 av_log(s, AV_LOG_WARNING,
319 "Too many samples in block: %"PRIu32"\n", block_samples);
321 pkt->duration = block_samples;
326 AVInputFormat ff_wv_demuxer = {
328 .long_name = NULL_IF_CONFIG_SMALL("WavPack"),
329 .priv_data_size = sizeof(WVContext),
330 .read_probe = wv_probe,
331 .read_header = wv_read_header,
332 .read_packet = wv_read_packet,
333 .flags = AVFMT_GENERIC_INDEX,