2 * Pro Pinball Series Soundbank (44c, 22c, 11c, 5c) demuxer.
4 * Copyright (C) 2020 Zane van Iperen (zane@zanevaniperen.com)
6 * This file is part of FFmpeg.
8 * FFmpeg is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; either
11 * version 2.1 of the License, or (at your option) any later version.
13 * FFmpeg is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Lesser General Public License for more details.
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with FFmpeg; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
24 #include "libavutil/intreadwrite.h"
25 #include "libavutil/avassert.h"
26 #include "libavutil/internal.h"
28 #define PP_BNK_MAX_READ_SIZE 4096
29 #define PP_BNK_FILE_HEADER_SIZE 20
30 #define PP_BNK_TRACK_SIZE 20
32 typedef struct PPBnkHeader {
33 uint32_t bank_id; /*< Bank ID, useless for our purposes. */
34 uint32_t sample_rate; /*< Sample rate of the contained tracks. */
35 uint32_t always1; /*< Unknown, always seems to be 1. */
36 uint32_t track_count; /*< Number of tracks in the file. */
37 uint32_t flags; /*< Flags. */
40 typedef struct PPBnkTrack {
41 uint32_t id; /*< Track ID. Usually track[i].id == track[i-1].id + 1, but not always */
42 uint32_t size; /*< Size of the data in bytes. */
43 uint32_t sample_rate; /*< Sample rate. */
44 uint32_t always1_1; /*< Unknown, always seems to be 1. */
45 uint32_t always1_2; /*< Unknown, always seems to be 1. */
48 typedef struct PPBnkCtxTrack {
54 typedef struct PPBnkCtx {
56 PPBnkCtxTrack *tracks;
57 uint32_t current_track;
61 PP_BNK_FLAG_PERSIST = (1 << 0), /*< This is a large file, keep in memory. */
62 PP_BNK_FLAG_MUSIC = (1 << 1), /*< This is music. */
63 PP_BNK_FLAG_MASK = (PP_BNK_FLAG_PERSIST | PP_BNK_FLAG_MUSIC)
66 static void pp_bnk_parse_header(PPBnkHeader *hdr, const uint8_t *buf)
68 hdr->bank_id = AV_RL32(buf + 0);
69 hdr->sample_rate = AV_RL32(buf + 4);
70 hdr->always1 = AV_RL32(buf + 8);
71 hdr->track_count = AV_RL32(buf + 12);
72 hdr->flags = AV_RL32(buf + 16);
75 static void pp_bnk_parse_track(PPBnkTrack *trk, const uint8_t *buf)
77 trk->id = AV_RL32(buf + 0);
78 trk->size = AV_RL32(buf + 4);
79 trk->sample_rate = AV_RL32(buf + 8);
80 trk->always1_1 = AV_RL32(buf + 12);
81 trk->always1_2 = AV_RL32(buf + 16);
84 static int pp_bnk_probe(const AVProbeData *p)
86 uint32_t sample_rate = AV_RL32(p->buf + 4);
87 uint32_t track_count = AV_RL32(p->buf + 12);
88 uint32_t flags = AV_RL32(p->buf + 16);
90 if (track_count == 0 || track_count > INT_MAX)
93 if ((sample_rate != 5512) && (sample_rate != 11025) &&
94 (sample_rate != 22050) && (sample_rate != 44100))
97 /* Check the first track header. */
98 if (AV_RL32(p->buf + 28) != sample_rate)
101 if ((flags & ~PP_BNK_FLAG_MASK) != 0)
104 return AVPROBE_SCORE_MAX / 4 + 1;
107 static int pp_bnk_read_header(AVFormatContext *s)
111 AVCodecParameters *par;
112 PPBnkCtx *ctx = s->priv_data;
113 uint8_t buf[FFMAX(PP_BNK_FILE_HEADER_SIZE, PP_BNK_TRACK_SIZE)];
116 if ((ret = avio_read(s->pb, buf, PP_BNK_FILE_HEADER_SIZE)) < 0)
118 else if (ret != PP_BNK_FILE_HEADER_SIZE)
121 pp_bnk_parse_header(&hdr, buf);
123 if (hdr.track_count == 0 || hdr.track_count > INT_MAX)
124 return AVERROR_INVALIDDATA;
126 if (hdr.sample_rate == 0 || hdr.sample_rate > INT_MAX)
127 return AVERROR_INVALIDDATA;
129 if (hdr.always1 != 1) {
130 avpriv_request_sample(s, "Non-one header value");
131 return AVERROR_PATCHWELCOME;
134 ctx->track_count = hdr.track_count;
136 if (!(ctx->tracks = av_malloc_array(hdr.track_count, sizeof(PPBnkCtxTrack))))
137 return AVERROR(ENOMEM);
139 /* Parse and validate each track. */
140 for (int i = 0; i < hdr.track_count; i++) {
142 PPBnkCtxTrack *trk = ctx->tracks + i;
144 ret = avio_read(s->pb, buf, PP_BNK_TRACK_SIZE);
145 if (ret < 0 && ret != AVERROR_EOF)
148 /* Short byte-count or EOF, we have a truncated file. */
149 if (ret != PP_BNK_TRACK_SIZE) {
150 av_log(s, AV_LOG_WARNING, "File truncated at %d/%u track(s)\n",
152 ctx->track_count = i;
156 pp_bnk_parse_track(&e, buf);
158 /* The individual sample rates of all tracks must match that of the file header. */
159 if (e.sample_rate != hdr.sample_rate) {
160 ret = AVERROR_INVALIDDATA;
164 if (e.always1_1 != 1 || e.always1_2 != 1) {
165 avpriv_request_sample(s, "Non-one track header values");
166 ret = AVERROR_PATCHWELCOME;
170 trk->data_offset = avio_tell(s->pb);
171 trk->data_size = e.size;
175 * Skip over the data to the next stream header.
176 * Sometimes avio_skip() doesn't detect EOF. If it doesn't, either:
177 * - the avio_read() above will, or
178 * - pp_bnk_read_packet() will read a truncated last track.
180 if ((ret = avio_skip(s->pb, e.size)) == AVERROR_EOF) {
181 ctx->track_count = i + 1;
182 av_log(s, AV_LOG_WARNING,
183 "Track %d has truncated data, assuming track count == %d\n",
184 i, ctx->track_count);
186 } else if (ret < 0) {
191 /* File is only a header. */
192 if (ctx->track_count == 0) {
193 ret = AVERROR_INVALIDDATA;
197 /* Build the streams. */
198 for (int i = 0; i < ctx->track_count; i++) {
199 if (!(st = avformat_new_stream(s, NULL))) {
200 ret = AVERROR(ENOMEM);
205 par->codec_type = AVMEDIA_TYPE_AUDIO;
206 par->codec_id = AV_CODEC_ID_ADPCM_IMA_CUNNING;
207 par->format = AV_SAMPLE_FMT_S16;
208 par->channel_layout = AV_CH_LAYOUT_MONO;
210 par->sample_rate = hdr.sample_rate;
211 par->bits_per_coded_sample = 4;
212 par->bits_per_raw_sample = 16;
213 par->block_align = 1;
214 par->bit_rate = par->sample_rate * par->bits_per_coded_sample;
216 avpriv_set_pts_info(st, 64, 1, par->sample_rate);
218 st->duration = ctx->tracks[i].data_size * 2;
224 av_freep(&ctx->tracks);
228 static int pp_bnk_read_packet(AVFormatContext *s, AVPacket *pkt)
230 PPBnkCtx *ctx = s->priv_data;
233 * Read a packet from each track, round-robin style.
234 * This method is nasty, but needed to avoid "Too many packets buffered" errors.
236 for (int i = 0; i < ctx->track_count; i++, ctx->current_track++)
242 ctx->current_track %= ctx->track_count;
244 trk = ctx->tracks + ctx->current_track;
246 if (trk->bytes_read == trk->data_size)
249 if ((ret = avio_seek(s->pb, trk->data_offset + trk->bytes_read, SEEK_SET)) < 0)
251 else if (ret != trk->data_offset + trk->bytes_read)
254 size = FFMIN(trk->data_size - trk->bytes_read, PP_BNK_MAX_READ_SIZE);
256 if ((ret = av_get_packet(s->pb, pkt, size)) == AVERROR_EOF) {
257 /* If we've hit EOF, don't attempt this track again. */
258 trk->data_size = trk->bytes_read;
260 } else if (ret < 0) {
264 trk->bytes_read += ret;
265 pkt->flags &= ~AV_PKT_FLAG_CORRUPT;
266 pkt->stream_index = ctx->current_track++;
267 pkt->duration = ret * 2;
271 /* If we reach here, we're done. */
275 static int pp_bnk_read_close(AVFormatContext *s)
277 PPBnkCtx *ctx = s->priv_data;
279 av_freep(&ctx->tracks);
284 AVInputFormat ff_pp_bnk_demuxer = {
286 .long_name = NULL_IF_CONFIG_SMALL("Pro Pinball Series Soundbank"),
287 .priv_data_size = sizeof(PPBnkCtx),
288 .read_probe = pp_bnk_probe,
289 .read_header = pp_bnk_read_header,
290 .read_packet = pp_bnk_read_packet,
291 .read_close = pp_bnk_read_close