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Diffstat (limited to 'ffmpeg/libavformat/anm.c')
-rw-r--r--ffmpeg/libavformat/anm.c229
1 files changed, 0 insertions, 229 deletions
diff --git a/ffmpeg/libavformat/anm.c b/ffmpeg/libavformat/anm.c
deleted file mode 100644
index 1c58575..0000000
--- a/ffmpeg/libavformat/anm.c
+++ /dev/null
@@ -1,229 +0,0 @@
-/*
- * Deluxe Paint Animation demuxer
- * Copyright (c) 2009 Peter Ross
- *
- * This file is part of FFmpeg.
- *
- * FFmpeg is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * FFmpeg is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with FFmpeg; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
- */
-
-/**
- * @file
- * Deluxe Paint Animation demuxer
- */
-
-#include "libavutil/intreadwrite.h"
-#include "avformat.h"
-#include "internal.h"
-
-typedef struct {
- int base_record;
- unsigned int nb_records;
- int size;
-} Page;
-
-typedef struct {
- unsigned int nb_pages; /**< total pages in file */
- unsigned int nb_records; /**< total records in file */
- int page_table_offset;
-#define MAX_PAGES 256 /**< Deluxe Paint hardcoded value */
- Page pt[MAX_PAGES]; /**< page table */
- int page; /**< current page (or AVERROR_xxx code) */
- int record; /**< current record (with in page) */
-} AnmDemuxContext;
-
-#define LPF_TAG MKTAG('L','P','F',' ')
-#define ANIM_TAG MKTAG('A','N','I','M')
-
-static int probe(AVProbeData *p)
-{
- /* verify tags and video dimensions */
- if (AV_RL32(&p->buf[0]) == LPF_TAG &&
- AV_RL32(&p->buf[16]) == ANIM_TAG &&
- AV_RL16(&p->buf[20]) && AV_RL16(&p->buf[22]))
- return AVPROBE_SCORE_MAX;
- return 0;
-}
-
-/**
- * @return page containing the requested record or AVERROR_XXX
- */
-static int find_record(const AnmDemuxContext *anm, int record)
-{
- int i;
-
- if (record >= anm->nb_records)
- return AVERROR_EOF;
-
- for (i = 0; i < MAX_PAGES; i++) {
- const Page *p = &anm->pt[i];
- if (p->nb_records > 0 && record >= p->base_record && record < p->base_record + p->nb_records)
- return i;
- }
-
- return AVERROR_INVALIDDATA;
-}
-
-static int read_header(AVFormatContext *s)
-{
- AnmDemuxContext *anm = s->priv_data;
- AVIOContext *pb = s->pb;
- AVStream *st;
- int i, ret;
-
- avio_skip(pb, 4); /* magic number */
- if (avio_rl16(pb) != MAX_PAGES) {
- avpriv_request_sample(s, "max_pages != " AV_STRINGIFY(MAX_PAGES));
- return AVERROR_PATCHWELCOME;
- }
-
- anm->nb_pages = avio_rl16(pb);
- anm->nb_records = avio_rl32(pb);
- avio_skip(pb, 2); /* max records per page */
- anm->page_table_offset = avio_rl16(pb);
- if (avio_rl32(pb) != ANIM_TAG)
- return AVERROR_INVALIDDATA;
-
- /* video stream */
- st = avformat_new_stream(s, NULL);
- if (!st)
- return AVERROR(ENOMEM);
- st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
- st->codec->codec_id = AV_CODEC_ID_ANM;
- st->codec->codec_tag = 0; /* no fourcc */
- st->codec->width = avio_rl16(pb);
- st->codec->height = avio_rl16(pb);
- if (avio_r8(pb) != 0)
- goto invalid;
- avio_skip(pb, 1); /* frame rate multiplier info */
-
- /* ignore last delta record (used for looping) */
- if (avio_r8(pb)) /* has_last_delta */
- anm->nb_records = FFMAX(anm->nb_records - 1, 0);
-
- avio_skip(pb, 1); /* last_delta_valid */
-
- if (avio_r8(pb) != 0)
- goto invalid;
-
- if (avio_r8(pb) != 1)
- goto invalid;
-
- avio_skip(pb, 1); /* other recs per frame */
-
- if (avio_r8(pb) != 1)
- goto invalid;
-
- avio_skip(pb, 32); /* record_types */
- st->nb_frames = avio_rl32(pb);
- avpriv_set_pts_info(st, 64, 1, avio_rl16(pb));
- avio_skip(pb, 58);
-
- /* color cycling and palette data */
- st->codec->extradata_size = 16*8 + 4*256;
- st->codec->extradata = av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
- if (!st->codec->extradata) {
- return AVERROR(ENOMEM);
- }
- ret = avio_read(pb, st->codec->extradata, st->codec->extradata_size);
- if (ret < 0)
- return ret;
-
- /* read page table */
- ret = avio_seek(pb, anm->page_table_offset, SEEK_SET);
- if (ret < 0)
- return ret;
-
- for (i = 0; i < MAX_PAGES; i++) {
- Page *p = &anm->pt[i];
- p->base_record = avio_rl16(pb);
- p->nb_records = avio_rl16(pb);
- p->size = avio_rl16(pb);
- }
-
- /* find page of first frame */
- anm->page = find_record(anm, 0);
- if (anm->page < 0) {
- return anm->page;
- }
-
- anm->record = -1;
- return 0;
-
-invalid:
- avpriv_request_sample(s, "Invalid header element");
- return AVERROR_PATCHWELCOME;
-}
-
-static int read_packet(AVFormatContext *s,
- AVPacket *pkt)
-{
- AnmDemuxContext *anm = s->priv_data;
- AVIOContext *pb = s->pb;
- Page *p;
- int tmp, record_size;
-
- if (url_feof(s->pb))
- return AVERROR(EIO);
-
- if (anm->page < 0)
- return anm->page;
-
-repeat:
- p = &anm->pt[anm->page];
-
- /* parse page header */
- if (anm->record < 0) {
- avio_seek(pb, anm->page_table_offset + MAX_PAGES*6 + (anm->page<<16), SEEK_SET);
- avio_skip(pb, 8 + 2*p->nb_records);
- anm->record = 0;
- }
-
- /* if we have fetched all records in this page, then find the
- next page and repeat */
- if (anm->record >= p->nb_records) {
- anm->page = find_record(anm, p->base_record + p->nb_records);
- if (anm->page < 0)
- return anm->page;
- anm->record = -1;
- goto repeat;
- }
-
- /* fetch record size */
- tmp = avio_tell(pb);
- avio_seek(pb, anm->page_table_offset + MAX_PAGES*6 + (anm->page<<16) +
- 8 + anm->record * 2, SEEK_SET);
- record_size = avio_rl16(pb);
- avio_seek(pb, tmp, SEEK_SET);
-
- /* fetch record */
- pkt->size = av_get_packet(s->pb, pkt, record_size);
- if (pkt->size < 0)
- return pkt->size;
- if (p->base_record + anm->record == 0)
- pkt->flags |= AV_PKT_FLAG_KEY;
-
- anm->record++;
- return 0;
-}
-
-AVInputFormat ff_anm_demuxer = {
- .name = "anm",
- .long_name = NULL_IF_CONFIG_SMALL("Deluxe Paint Animation"),
- .priv_data_size = sizeof(AnmDemuxContext),
- .read_probe = probe,
- .read_header = read_header,
- .read_packet = read_packet,
-};
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