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790f793844
There are lots of files that don't need it: The number of object files that actually need it went down from 2011 to 884 here. Keep it for external users in order to not cause breakages. Also improve the other headers a bit while just at it. Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
331 lines
10 KiB
C
331 lines
10 KiB
C
/*
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* Pro Pinball Series Soundbank (44c, 22c, 11c, 5c) demuxer.
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*
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* Copyright (C) 2020 Zane van Iperen (zane@zanevaniperen.com)
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "avformat.h"
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#include "demux.h"
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#include "internal.h"
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#include "libavutil/intreadwrite.h"
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#include "libavutil/avassert.h"
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#include "libavutil/channel_layout.h"
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#include "libavutil/internal.h"
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#include "libavutil/mem.h"
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#define PP_BNK_MAX_READ_SIZE 4096
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#define PP_BNK_FILE_HEADER_SIZE 20
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#define PP_BNK_TRACK_SIZE 20
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typedef struct PPBnkHeader {
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uint32_t bank_id; /*< Bank ID, useless for our purposes. */
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uint32_t sample_rate; /*< Sample rate of the contained tracks. */
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uint32_t always1; /*< Unknown, always seems to be 1. */
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uint32_t track_count; /*< Number of tracks in the file. */
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uint32_t flags; /*< Flags. */
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} PPBnkHeader;
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typedef struct PPBnkTrack {
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uint32_t id; /*< Track ID. Usually track[i].id == track[i-1].id + 1, but not always */
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uint32_t size; /*< Size of the data in bytes. */
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uint32_t sample_rate; /*< Sample rate. */
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uint32_t always1_1; /*< Unknown, always seems to be 1. */
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uint32_t always1_2; /*< Unknown, always seems to be 1. */
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} PPBnkTrack;
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typedef struct PPBnkCtxTrack {
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int64_t data_offset;
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uint32_t data_size;
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uint32_t bytes_read;
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} PPBnkCtxTrack;
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typedef struct PPBnkCtx {
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int track_count;
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PPBnkCtxTrack *tracks;
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uint32_t current_track;
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int is_music;
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} PPBnkCtx;
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enum {
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PP_BNK_FLAG_PERSIST = (1 << 0), /*< This is a large file, keep in memory. */
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PP_BNK_FLAG_MUSIC = (1 << 1), /*< This is music. */
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PP_BNK_FLAG_MASK = (PP_BNK_FLAG_PERSIST | PP_BNK_FLAG_MUSIC)
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};
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static void pp_bnk_parse_header(PPBnkHeader *hdr, const uint8_t *buf)
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{
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hdr->bank_id = AV_RL32(buf + 0);
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hdr->sample_rate = AV_RL32(buf + 4);
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hdr->always1 = AV_RL32(buf + 8);
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hdr->track_count = AV_RL32(buf + 12);
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hdr->flags = AV_RL32(buf + 16);
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}
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static void pp_bnk_parse_track(PPBnkTrack *trk, const uint8_t *buf)
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{
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trk->id = AV_RL32(buf + 0);
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trk->size = AV_RL32(buf + 4);
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trk->sample_rate = AV_RL32(buf + 8);
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trk->always1_1 = AV_RL32(buf + 12);
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trk->always1_2 = AV_RL32(buf + 16);
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}
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static int pp_bnk_probe(const AVProbeData *p)
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{
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uint32_t sample_rate = AV_RL32(p->buf + 4);
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uint32_t track_count = AV_RL32(p->buf + 12);
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uint32_t flags = AV_RL32(p->buf + 16);
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if (track_count == 0 || track_count > INT_MAX)
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return 0;
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if ((sample_rate != 5512) && (sample_rate != 11025) &&
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(sample_rate != 22050) && (sample_rate != 44100))
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return 0;
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/* Check the first track header. */
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if (AV_RL32(p->buf + 28) != sample_rate)
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return 0;
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if ((flags & ~PP_BNK_FLAG_MASK) != 0)
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return 0;
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return AVPROBE_SCORE_MAX / 4 + 1;
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}
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static int pp_bnk_read_header(AVFormatContext *s)
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{
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int64_t ret;
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AVStream *st;
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AVCodecParameters *par;
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PPBnkCtx *ctx = s->priv_data;
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uint8_t buf[FFMAX(PP_BNK_FILE_HEADER_SIZE, PP_BNK_TRACK_SIZE)];
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PPBnkHeader hdr;
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if ((ret = avio_read(s->pb, buf, PP_BNK_FILE_HEADER_SIZE)) < 0)
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return ret;
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else if (ret != PP_BNK_FILE_HEADER_SIZE)
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return AVERROR(EIO);
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pp_bnk_parse_header(&hdr, buf);
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if (hdr.track_count == 0 || hdr.track_count > INT_MAX)
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return AVERROR_INVALIDDATA;
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if (hdr.sample_rate == 0 || hdr.sample_rate > INT_MAX)
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return AVERROR_INVALIDDATA;
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if (hdr.always1 != 1) {
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avpriv_request_sample(s, "Non-one header value");
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return AVERROR_PATCHWELCOME;
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}
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ctx->track_count = hdr.track_count;
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if (!(ctx->tracks = av_malloc_array(hdr.track_count, sizeof(PPBnkCtxTrack))))
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return AVERROR(ENOMEM);
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/* Parse and validate each track. */
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for (int i = 0; i < hdr.track_count; i++) {
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PPBnkTrack e;
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PPBnkCtxTrack *trk = ctx->tracks + i;
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ret = avio_read(s->pb, buf, PP_BNK_TRACK_SIZE);
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if (ret < 0 && ret != AVERROR_EOF)
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return ret;
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/* Short byte-count or EOF, we have a truncated file. */
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if (ret != PP_BNK_TRACK_SIZE) {
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av_log(s, AV_LOG_WARNING, "File truncated at %d/%u track(s)\n",
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i, hdr.track_count);
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ctx->track_count = i;
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break;
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}
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pp_bnk_parse_track(&e, buf);
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/* The individual sample rates of all tracks must match that of the file header. */
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if (e.sample_rate != hdr.sample_rate)
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return AVERROR_INVALIDDATA;
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if (e.always1_1 != 1 || e.always1_2 != 1) {
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avpriv_request_sample(s, "Non-one track header values");
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return AVERROR_PATCHWELCOME;
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}
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trk->data_offset = avio_tell(s->pb);
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trk->data_size = e.size;
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trk->bytes_read = 0;
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/*
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* Skip over the data to the next stream header.
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* Sometimes avio_skip() doesn't detect EOF. If it doesn't, either:
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* - the avio_read() above will, or
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* - pp_bnk_read_packet() will read a truncated last track.
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*/
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if ((ret = avio_skip(s->pb, e.size)) == AVERROR_EOF) {
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ctx->track_count = i + 1;
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av_log(s, AV_LOG_WARNING,
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"Track %d has truncated data, assuming track count == %d\n",
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i, ctx->track_count);
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break;
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} else if (ret < 0) {
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return ret;
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}
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}
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/* File is only a header. */
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if (ctx->track_count == 0)
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return AVERROR_INVALIDDATA;
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ctx->is_music = (hdr.flags & PP_BNK_FLAG_MUSIC) &&
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(ctx->track_count == 2) &&
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(ctx->tracks[0].data_size == ctx->tracks[1].data_size);
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/* Build the streams. */
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for (int i = 0; i < (ctx->is_music ? 1 : ctx->track_count); i++) {
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if (!(st = avformat_new_stream(s, NULL)))
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return AVERROR(ENOMEM);
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par = st->codecpar;
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par->codec_type = AVMEDIA_TYPE_AUDIO;
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par->codec_id = AV_CODEC_ID_ADPCM_IMA_CUNNING;
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par->format = AV_SAMPLE_FMT_S16P;
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av_channel_layout_default(&par->ch_layout, ctx->is_music + 1);
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par->sample_rate = hdr.sample_rate;
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par->bits_per_coded_sample = 4;
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par->block_align = 1;
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par->bit_rate = par->sample_rate * (int64_t)par->bits_per_coded_sample *
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par->ch_layout.nb_channels;
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avpriv_set_pts_info(st, 64, 1, par->sample_rate);
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st->start_time = 0;
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st->duration = ctx->tracks[i].data_size * 2;
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}
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return 0;
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}
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static int pp_bnk_read_packet(AVFormatContext *s, AVPacket *pkt)
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{
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PPBnkCtx *ctx = s->priv_data;
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/*
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* Read a packet from each track, round-robin style.
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* This method is nasty, but needed to avoid "Too many packets buffered" errors.
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*/
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for (int i = 0; i < ctx->track_count; i++, ctx->current_track++)
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{
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int64_t ret;
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int size;
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PPBnkCtxTrack *trk;
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ctx->current_track %= ctx->track_count;
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trk = ctx->tracks + ctx->current_track;
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if (trk->bytes_read == trk->data_size)
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continue;
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if ((ret = avio_seek(s->pb, trk->data_offset + trk->bytes_read, SEEK_SET)) < 0)
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return ret;
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else if (ret != trk->data_offset + trk->bytes_read)
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return AVERROR(EIO);
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size = FFMIN(trk->data_size - trk->bytes_read, PP_BNK_MAX_READ_SIZE);
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if (!ctx->is_music) {
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ret = av_get_packet(s->pb, pkt, size);
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if (ret == AVERROR_EOF) {
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/* If we've hit EOF, don't attempt this track again. */
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trk->data_size = trk->bytes_read;
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continue;
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}
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} else {
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if (!pkt->data && (ret = av_new_packet(pkt, size * 2)) < 0)
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return ret;
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ret = avio_read(s->pb, pkt->data + size * ctx->current_track, size);
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if (ret >= 0 && ret != size) {
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/* Only return stereo packets if both tracks could be read. */
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ret = AVERROR_EOF;
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}
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}
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if (ret < 0)
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return ret;
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trk->bytes_read += ret;
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pkt->flags &= ~AV_PKT_FLAG_CORRUPT;
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pkt->stream_index = ctx->current_track;
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pkt->duration = ret * 2;
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if (ctx->is_music) {
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if (pkt->stream_index == 0)
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continue;
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pkt->stream_index = 0;
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}
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ctx->current_track++;
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return 0;
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}
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/* If we reach here, we're done. */
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return AVERROR_EOF;
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}
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static int pp_bnk_read_close(AVFormatContext *s)
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{
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PPBnkCtx *ctx = s->priv_data;
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av_freep(&ctx->tracks);
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return 0;
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}
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static int pp_bnk_seek(AVFormatContext *s, int stream_index,
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int64_t pts, int flags)
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{
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PPBnkCtx *ctx = s->priv_data;
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if (pts != 0)
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return AVERROR(EINVAL);
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if (ctx->is_music) {
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av_assert0(stream_index == 0);
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ctx->tracks[0].bytes_read = 0;
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ctx->tracks[1].bytes_read = 0;
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} else {
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ctx->tracks[stream_index].bytes_read = 0;
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}
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return 0;
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}
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const FFInputFormat ff_pp_bnk_demuxer = {
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.p.name = "pp_bnk",
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.p.long_name = NULL_IF_CONFIG_SMALL("Pro Pinball Series Soundbank"),
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.priv_data_size = sizeof(PPBnkCtx),
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.flags_internal = FF_INFMT_FLAG_INIT_CLEANUP,
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.read_probe = pp_bnk_probe,
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.read_header = pp_bnk_read_header,
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.read_packet = pp_bnk_read_packet,
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.read_close = pp_bnk_read_close,
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.read_seek = pp_bnk_seek,
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};
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