mirror of
https://git.ffmpeg.org/ffmpeg.git
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b800327f4c
This commit does for AVInputFormat what commit59c9dc82f4
did for AVOutputFormat: It adds a new type FFInputFormat, moves all the internals of AVInputFormat to it and adds a now reduced AVInputFormat as first member. This does not affect/improve extensibility of both public or private fields for demuxers (it is still a mess due to lavd). This is possible since50f34172e0
(which removed the last usage of an internal field of AVInputFormat in fftools). (Hint: tools/probetest.c accesses the internals of FFInputFormat as well, but given that it is a testing tool this is not considered a problem.) Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
398 lines
12 KiB
C
398 lines
12 KiB
C
/*
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* AAX demuxer
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* Copyright (c) 2020 Paul B Mahol
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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 "libavutil/intreadwrite.h"
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#include "avformat.h"
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#include "avio_internal.h"
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#include "demux.h"
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#include "internal.h"
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typedef struct AAXColumn {
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uint8_t flag;
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uint8_t type;
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const char *name;
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uint32_t offset;
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int size;
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} AAXColumn;
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typedef struct AAXSegment {
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int64_t start;
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int64_t end;
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} AAXSegment;
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typedef struct AAXContext {
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int64_t table_size;
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uint16_t version;
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int64_t rows_offset;
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int64_t strings_offset;
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int64_t data_offset;
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int64_t name_offset;
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uint16_t columns;
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uint16_t row_width;
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uint32_t nb_segments;
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int64_t schema_offset;
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int64_t strings_size;
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char *string_table;
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uint32_t current_segment;
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AAXColumn *xcolumns;
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AAXSegment *segments;
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} AAXContext;
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static int aax_probe(const AVProbeData *p)
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{
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if (AV_RB32(p->buf) != MKBETAG('@','U','T','F'))
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return 0;
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if (AV_RB32(p->buf + 4) == 0)
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return 0;
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if (AV_RB16(p->buf + 8) > 1)
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return 0;
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if (AV_RB32(p->buf + 28) < 1)
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return 0;
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return AVPROBE_SCORE_MAX;
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}
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enum ColumnFlag {
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COLUMN_FLAG_NAME = 0x1,
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COLUMN_FLAG_DEFAULT = 0x2,
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COLUMN_FLAG_ROW = 0x4,
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COLUMN_FLAG_UNDEFINED = 0x8 /* shouldn't exist */
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};
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enum ColumnType {
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COLUMN_TYPE_UINT8 = 0x00,
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COLUMN_TYPE_SINT8 = 0x01,
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COLUMN_TYPE_UINT16 = 0x02,
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COLUMN_TYPE_SINT16 = 0x03,
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COLUMN_TYPE_UINT32 = 0x04,
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COLUMN_TYPE_SINT32 = 0x05,
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COLUMN_TYPE_UINT64 = 0x06,
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COLUMN_TYPE_SINT64 = 0x07,
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COLUMN_TYPE_FLOAT = 0x08,
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COLUMN_TYPE_DOUBLE = 0x09,
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COLUMN_TYPE_STRING = 0x0a,
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COLUMN_TYPE_VLDATA = 0x0b,
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COLUMN_TYPE_UINT128 = 0x0c, /* for GUIDs */
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COLUMN_TYPE_UNDEFINED = -1
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};
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static int64_t get_pts(AVFormatContext *s, int64_t pos, int size)
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{
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AAXContext *a = s->priv_data;
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int64_t pts = 0;
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for (int seg = 0; seg < a->current_segment; seg++)
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pts += (a->segments[seg].end - a->segments[seg].start) / size;
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pts += ((pos - a->segments[a->current_segment].start) / size);
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return pts;
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}
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static int aax_read_header(AVFormatContext *s)
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{
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AAXContext *a = s->priv_data;
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AVIOContext *pb = s->pb;
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AVCodecParameters *par;
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AVStream *st;
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int64_t column_offset = 0;
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int ret, extradata_size;
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char *codec;
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int64_t ret64;
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avio_skip(pb, 4);
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a->table_size = avio_rb32(pb) + 8LL;
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a->version = avio_rb16(pb);
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a->rows_offset = avio_rb16(pb) + 8LL;
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a->strings_offset = avio_rb32(pb) + 8LL;
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a->data_offset = avio_rb32(pb) + 8LL;
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a->name_offset = avio_rb32(pb);
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a->columns = avio_rb16(pb);
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a->row_width = avio_rb16(pb);
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a->nb_segments = avio_rb32(pb);
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if (a->nb_segments < 1)
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return AVERROR_INVALIDDATA;
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a->schema_offset = 0x20;
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a->strings_size = a->data_offset - a->strings_offset;
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if (a->rows_offset > a->table_size ||
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a->strings_offset > a->table_size ||
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a->data_offset > a->table_size)
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return AVERROR_INVALIDDATA;
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if (a->strings_size <= 0 || a->name_offset >= a->strings_size ||
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a->strings_size > UINT16_MAX)
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return AVERROR_INVALIDDATA;
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if (a->columns <= 0)
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return AVERROR_INVALIDDATA;
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a->segments = av_calloc(a->nb_segments, sizeof(*a->segments));
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if (!a->segments)
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return AVERROR(ENOMEM);
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a->xcolumns = av_calloc(a->columns, sizeof(*a->xcolumns));
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if (!a->xcolumns)
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return AVERROR(ENOMEM);
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a->string_table = av_calloc(a->strings_size + 1, sizeof(*a->string_table));
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if (!a->string_table)
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return AVERROR(ENOMEM);
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for (int c = 0; c < a->columns; c++) {
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uint8_t info = avio_r8(pb);
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uint32_t offset = avio_rb32(pb);
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int value_size;
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if (offset >= a->strings_size)
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return AVERROR_INVALIDDATA;
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a->xcolumns[c].flag = info >> 4;
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a->xcolumns[c].type = info & 0x0F;
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switch (a->xcolumns[c].type) {
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case COLUMN_TYPE_UINT8:
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case COLUMN_TYPE_SINT8:
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value_size = 0x01;
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break;
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case COLUMN_TYPE_UINT16:
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case COLUMN_TYPE_SINT16:
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value_size = 0x02;
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break;
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case COLUMN_TYPE_UINT32:
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case COLUMN_TYPE_SINT32:
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case COLUMN_TYPE_FLOAT:
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case COLUMN_TYPE_STRING:
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value_size = 0x04;
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break;
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case COLUMN_TYPE_VLDATA:
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value_size = 0x08;
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break;
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case COLUMN_TYPE_UINT128:
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value_size = 0x10;
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break;
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default:
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return AVERROR_INVALIDDATA;
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}
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a->xcolumns[c].size = value_size;
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if (a->xcolumns[c].flag & COLUMN_FLAG_NAME)
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a->xcolumns[c].name = a->string_table + offset;
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if (a->xcolumns[c].flag & COLUMN_FLAG_DEFAULT) {
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/* data is found relative to columns start */
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a->xcolumns[c].offset = avio_tell(pb) - a->schema_offset;
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avio_skip(pb, value_size);
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}
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if (a->xcolumns[c].flag & COLUMN_FLAG_ROW) {
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/* data is found relative to row start */
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a->xcolumns[c].offset = column_offset;
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column_offset += value_size;
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}
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}
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ret = ret64 = avio_seek(pb, a->strings_offset, SEEK_SET);
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if (ret64 < 0)
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return ret;
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ret = ffio_read_size(pb, a->string_table, a->strings_size);
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if (ret < 0)
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return ret;
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for (int c = 0; c < a->columns; c++) {
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int64_t data_offset = 0;
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int64_t col_offset;
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int flag, type;
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if (!a->xcolumns[c].name || strcmp(a->xcolumns[c].name, "data"))
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continue;
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type = a->xcolumns[c].type;
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flag = a->xcolumns[c].flag;
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col_offset = a->xcolumns[c].offset;
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for (uint64_t r = 0; r < a->nb_segments; r++) {
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if (flag & COLUMN_FLAG_DEFAULT) {
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data_offset = a->schema_offset + col_offset;
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} else if (flag & COLUMN_FLAG_ROW) {
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data_offset = a->rows_offset + r * a->row_width + col_offset;
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} else
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return AVERROR_INVALIDDATA;
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ret = ret64 = avio_seek(pb, data_offset, SEEK_SET);
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if (ret64 < 0)
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return ret;
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if (type == COLUMN_TYPE_VLDATA) {
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int64_t start, size;
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start = avio_rb32(pb);
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size = avio_rb32(pb);
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if (!size)
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return AVERROR_INVALIDDATA;
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a->segments[r].start = start + a->data_offset;
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a->segments[r].end = a->segments[r].start + size;
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if (r &&
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a->segments[r].start < a->segments[r-1].end &&
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a->segments[r].end > a->segments[r-1].start)
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return AVERROR_INVALIDDATA;
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} else
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return AVERROR_INVALIDDATA;
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}
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}
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if (!a->segments[0].end)
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return AVERROR_INVALIDDATA;
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st = avformat_new_stream(s, NULL);
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if (!st)
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return AVERROR(ENOMEM);
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st->start_time = 0;
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par = s->streams[0]->codecpar;
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par->codec_type = AVMEDIA_TYPE_AUDIO;
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codec = a->string_table + a->name_offset;
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if (!strcmp(codec, "AAX")) {
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par->codec_id = AV_CODEC_ID_ADPCM_ADX;
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ret64 = avio_seek(pb, a->segments[0].start, SEEK_SET);
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if (ret64 < 0 || avio_rb16(pb) != 0x8000)
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return AVERROR_INVALIDDATA;
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extradata_size = avio_rb16(pb) + 4;
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if (extradata_size < 12)
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return AVERROR_INVALIDDATA;
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avio_seek(pb, -4, SEEK_CUR);
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ret = ff_get_extradata(s, par, pb, extradata_size);
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if (ret < 0)
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return ret;
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par->ch_layout.nb_channels = AV_RB8 (par->extradata + 7);
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par->sample_rate = AV_RB32(par->extradata + 8);
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if (!par->ch_layout.nb_channels || !par->sample_rate)
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return AVERROR_INVALIDDATA;
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avpriv_set_pts_info(st, 64, 32, par->sample_rate);
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/*} else if (!strcmp(codec, "HCA") ){
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par->codec_id = AV_CODEC_ID_HCA;*/
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} else {
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return AVERROR_INVALIDDATA;
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}
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return 0;
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}
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static int aax_read_packet(AVFormatContext *s, AVPacket *pkt)
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{
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AAXContext *a = s->priv_data;
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AVCodecParameters *par = s->streams[0]->codecpar;
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AVIOContext *pb = s->pb;
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const int size = 18 * par->ch_layout.nb_channels;
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int ret, extradata_size = 0;
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uint8_t *extradata = NULL;
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int skip = 0;
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if (avio_feof(pb))
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return AVERROR_EOF;
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pkt->pos = avio_tell(pb);
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for (uint32_t seg = 0; seg < a->nb_segments; seg++) {
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int64_t start = a->segments[seg].start;
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int64_t end = a->segments[seg].end;
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if (pkt->pos >= start && pkt->pos <= end) {
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a->current_segment = seg;
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if (par->codec_id == AV_CODEC_ID_ADPCM_ADX)
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skip = (end - start) - ((end - start) / size) * size;
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break;
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}
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}
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if (pkt->pos >= a->segments[a->current_segment].end - skip) {
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if (a->current_segment + 1 == a->nb_segments)
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return AVERROR_EOF;
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a->current_segment++;
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avio_seek(pb, a->segments[a->current_segment].start, SEEK_SET);
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if (par->codec_id == AV_CODEC_ID_ADPCM_ADX) {
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if (avio_rb16(pb) != 0x8000)
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return AVERROR_INVALIDDATA;
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extradata_size = avio_rb16(pb) + 4;
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avio_seek(pb, -4, SEEK_CUR);
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if (extradata_size < 12)
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return AVERROR_INVALIDDATA;
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extradata = av_malloc(extradata_size + AV_INPUT_BUFFER_PADDING_SIZE);
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if (!extradata)
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return AVERROR(ENOMEM);
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if (avio_read(pb, extradata, extradata_size) != extradata_size) {
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av_free(extradata);
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return AVERROR(EIO);
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}
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memset(extradata + extradata_size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
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}
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}
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ret = av_get_packet(pb, pkt, size);
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if (ret != size) {
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av_free(extradata);
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return ret < 0 ? ret : AVERROR(EIO);
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}
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pkt->duration = 1;
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pkt->stream_index = 0;
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pkt->pts = get_pts(s, pkt->pos, size);
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if (extradata) {
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ret = av_packet_add_side_data(pkt, AV_PKT_DATA_NEW_EXTRADATA, extradata, extradata_size);
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if (ret < 0) {
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av_free(extradata);
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return ret;
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}
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}
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return ret;
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}
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static int aax_read_close(AVFormatContext *s)
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{
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AAXContext *a = s->priv_data;
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av_freep(&a->segments);
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av_freep(&a->xcolumns);
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av_freep(&a->string_table);
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return 0;
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}
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const FFInputFormat ff_aax_demuxer = {
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.p.name = "aax",
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.p.long_name = NULL_IF_CONFIG_SMALL("CRI AAX"),
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.p.extensions = "aax",
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.p.flags = AVFMT_GENERIC_INDEX,
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.priv_data_size = sizeof(AAXContext),
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.flags_internal = FF_FMT_INIT_CLEANUP,
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.read_probe = aax_probe,
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.read_header = aax_read_header,
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.read_packet = aax_read_packet,
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.read_close = aax_read_close,
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};
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