Fix build: Add intreadwrite.h and bswap.h #includes where necessary.
[libav.git] / libavformat / wv.c
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1/*
2 * WavPack demuxer
3 * Copyright (c) 2006 Konstantin Shishkov.
4 *
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5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
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8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
b78e7197 10 * version 2.1 of the License, or (at your option) any later version.
730581f3 11 *
b78e7197 12 * FFmpeg is distributed in the hope that it will be useful,
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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.
16 *
17 * You should have received a copy of the GNU Lesser General Public
b78e7197 18 * License along with FFmpeg; if not, write to the Free Software
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19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
6a5d31ac 22#include "libavutil/intreadwrite.h"
730581f3 23#include "avformat.h"
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24
25// specs say that maximum block size is 1Mb
26#define WV_BLOCK_LIMIT 1047576
27
28#define WV_EXTRA_SIZE 12
29
30enum WV_FLAGS{
31 WV_MONO = 0x0004,
32 WV_HYBRID = 0x0008,
33 WV_JOINT = 0x0010,
34 WV_CROSSD = 0x0020,
35 WV_HSHAPE = 0x0040,
36 WV_FLOAT = 0x0080,
37 WV_INT32 = 0x0100,
38 WV_HBR = 0x0200,
39 WV_HBAL = 0x0400,
40 WV_MCINIT = 0x0800,
41 WV_MCEND = 0x1000,
42};
43
44static const int wv_rates[16] = {
45 6000, 8000, 9600, 11025, 12000, 16000, 22050, 24000,
46 32000, 44100, 48000, 64000, 88200, 96000, 192000, -1
47};
48
49typedef struct{
50 uint32_t blksize, flags;
51 int rate, chan, bpp;
49561f99 52 uint32_t samples, soff;
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53 int block_parsed;
54 uint8_t extra[WV_EXTRA_SIZE];
49561f99 55 int64_t pos;
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56}WVContext;
57
58static int wv_probe(AVProbeData *p)
59{
60 /* check file header */
61 if (p->buf_size <= 32)
62 return 0;
63 if (p->buf[0] == 'w' && p->buf[1] == 'v' &&
64 p->buf[2] == 'p' && p->buf[3] == 'k')
65 return AVPROBE_SCORE_MAX;
66 else
67 return 0;
68}
69
70static int wv_read_block_header(AVFormatContext *ctx, ByteIOContext *pb)
71{
72 WVContext *wc = ctx->priv_data;
73 uint32_t tag, ver;
74 int size;
75 int rate, bpp, chan;
76
49561f99 77 wc->pos = url_ftell(pb);
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78 tag = get_le32(pb);
79 if (tag != MKTAG('w', 'v', 'p', 'k'))
80 return -1;
81 size = get_le32(pb);
82 if(size < 24 || size > WV_BLOCK_LIMIT){
83 av_log(ctx, AV_LOG_ERROR, "Incorrect block size %i\n", size);
84 return -1;
85 }
86 wc->blksize = size;
87 ver = get_le16(pb);
a6ba65f7 88 if(ver < 0x402 || ver > 0x410){
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89 av_log(ctx, AV_LOG_ERROR, "Unsupported version %03X\n", ver);
90 return -1;
91 }
92 get_byte(pb); // track no
93 get_byte(pb); // track sub index
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94 wc->samples = get_le32(pb); // total samples in file
95 wc->soff = get_le32(pb); // offset in samples of current block
730581f3 96 get_buffer(pb, wc->extra, WV_EXTRA_SIZE);
fead30d4 97 wc->flags = AV_RL32(wc->extra + 4);
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98 //parse flags
99 if(wc->flags & WV_FLOAT){
100 av_log(ctx, AV_LOG_ERROR, "Floating point data is not supported\n");
101 return -1;
102 }
103 if(wc->flags & WV_HYBRID){
104 av_log(ctx, AV_LOG_ERROR, "Hybrid coding mode is not supported\n");
105 return -1;
106 }
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107
108 bpp = ((wc->flags & 3) + 1) << 3;
109 chan = 1 + !(wc->flags & WV_MONO);
110 rate = wv_rates[(wc->flags >> 23) & 0xF];
111 if(rate == -1){
112 av_log(ctx, AV_LOG_ERROR, "Unknown sampling rate\n");
113 return -1;
114 }
115 if(!wc->bpp) wc->bpp = bpp;
116 if(!wc->chan) wc->chan = chan;
117 if(!wc->rate) wc->rate = rate;
118
a8789714 119 if(wc->flags && bpp != wc->bpp){
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120 av_log(ctx, AV_LOG_ERROR, "Bits per sample differ, this block: %i, header block: %i\n", bpp, wc->bpp);
121 return -1;
122 }
a8789714 123 if(wc->flags && chan != wc->chan){
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124 av_log(ctx, AV_LOG_ERROR, "Channels differ, this block: %i, header block: %i\n", chan, wc->chan);
125 return -1;
126 }
a8789714 127 if(wc->flags && rate != wc->rate){
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128 av_log(ctx, AV_LOG_ERROR, "Sampling rate differ, this block: %i, header block: %i\n", rate, wc->rate);
129 return -1;
130 }
131 wc->blksize = size - 24;
132 return 0;
133}
134
135static int wv_read_header(AVFormatContext *s,
136 AVFormatParameters *ap)
137{
899681cd 138 ByteIOContext *pb = s->pb;
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139 WVContext *wc = s->priv_data;
140 AVStream *st;
141
142 if(wv_read_block_header(s, pb) < 0)
143 return -1;
144
145 wc->block_parsed = 0;
146 /* now we are ready: build format streams */
147 st = av_new_stream(s, 0);
148 if (!st)
149 return -1;
150 st->codec->codec_type = CODEC_TYPE_AUDIO;
151 st->codec->codec_id = CODEC_ID_WAVPACK;
152 st->codec->channels = wc->chan;
153 st->codec->sample_rate = wc->rate;
dd1c8f3e 154 st->codec->bits_per_coded_sample = wc->bpp;
730581f3 155 av_set_pts_info(st, 64, 1, wc->rate);
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156 s->start_time = 0;
157 s->duration = (int64_t)wc->samples * AV_TIME_BASE / st->codec->sample_rate;
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158 return 0;
159}
160
161static int wv_read_packet(AVFormatContext *s,
162 AVPacket *pkt)
163{
164 WVContext *wc = s->priv_data;
827f0561 165 int ret;
730581f3 166
899681cd 167 if (url_feof(s->pb))
8fa36ae0 168 return AVERROR(EIO);
730581f3 169 if(wc->block_parsed){
899681cd 170 if(wv_read_block_header(s, s->pb) < 0)
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171 return -1;
172 }
173
730581f3 174 if(av_new_packet(pkt, wc->blksize + WV_EXTRA_SIZE) < 0)
769e10f0 175 return AVERROR(ENOMEM);
730581f3 176 memcpy(pkt->data, wc->extra, WV_EXTRA_SIZE);
899681cd 177 ret = get_buffer(s->pb, pkt->data + WV_EXTRA_SIZE, wc->blksize);
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178 if(ret != wc->blksize){
179 av_free_packet(pkt);
6f3e0b21 180 return AVERROR(EIO);
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181 }
182 pkt->stream_index = 0;
183 wc->block_parsed = 1;
184 pkt->size = ret + WV_EXTRA_SIZE;
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185 pkt->pts = wc->soff;
186 av_add_index_entry(s->streams[0], wc->pos, pkt->pts, 0, 0, AVINDEX_KEYFRAME);
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187 return 0;
188}
189
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190static int wv_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
191{
192 AVStream *st = s->streams[stream_index];
193 WVContext *wc = s->priv_data;
194 AVPacket pkt1, *pkt = &pkt1;
195 int ret;
196 int index = av_index_search_timestamp(st, timestamp, flags);
197 int64_t pos, pts;
198
199 /* if found, seek there */
200 if (index >= 0){
201 wc->block_parsed = 1;
899681cd 202 url_fseek(s->pb, st->index_entries[index].pos, SEEK_SET);
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203 return 0;
204 }
205 /* if timestamp is out of bounds, return error */
206 if(timestamp < 0 || timestamp >= s->duration)
207 return -1;
208
899681cd 209 pos = url_ftell(s->pb);
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210 do{
211 ret = av_read_frame(s, pkt);
212 if (ret < 0){
899681cd 213 url_fseek(s->pb, pos, SEEK_SET);
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214 return -1;
215 }
216 pts = pkt->pts;
217 av_free_packet(pkt);
218 }while(pts < timestamp);
219 return 0;
220}
221
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222AVInputFormat wv_demuxer = {
223 "wv",
bde15e74 224 NULL_IF_CONFIG_SMALL("WavPack"),
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225 sizeof(WVContext),
226 wv_probe,
227 wv_read_header,
228 wv_read_packet,
6a862b49 229 NULL,
49561f99 230 wv_read_seek,
730581f3 231};