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mirror of https://github.com/FFmpeg/FFmpeg.git synced 2024-12-07 11:13:41 +02:00
FFmpeg/libavformat/anm.c
Michael Niedermayer e37f161e66 Merge remote-tracking branch 'qatar/master'
* qatar/master: (71 commits)
  movenc: Allow writing to a non-seekable output if using empty moov
  movenc: Support adding isml (smooth streaming live) metadata
  libavcodec: Don't crash in avcodec_encode_audio if time_base isn't set
  sunrast: Document the different Sun Raster file format types.
  sunrast: Add a check for experimental type.
  libspeexenc: use AVSampleFormat instead of deprecated/removed SampleFormat
  lavf: remove disabled FF_API_SET_PTS_INFO cruft
  lavf: remove disabled FF_API_OLD_INTERRUPT_CB cruft
  lavf: remove disabled FF_API_REORDER_PRIVATE cruft
  lavf: remove disabled FF_API_SEEK_PUBLIC cruft
  lavf: remove disabled FF_API_STREAM_COPY cruft
  lavf: remove disabled FF_API_PRELOAD cruft
  lavf: remove disabled FF_API_NEW_STREAM cruft
  lavf: remove disabled FF_API_RTSP_URL_OPTIONS cruft
  lavf: remove disabled FF_API_MUXRATE cruft
  lavf: remove disabled FF_API_FILESIZE cruft
  lavf: remove disabled FF_API_TIMESTAMP cruft
  lavf: remove disabled FF_API_LOOP_OUTPUT cruft
  lavf: remove disabled FF_API_LOOP_INPUT cruft
  lavf: remove disabled FF_API_AVSTREAM_QUALITY cruft
  ...

Conflicts:
	doc/APIchanges
	libavcodec/8bps.c
	libavcodec/avcodec.h
	libavcodec/libx264.c
	libavcodec/mjpegbdec.c
	libavcodec/options.c
	libavcodec/sunrast.c
	libavcodec/utils.c
	libavcodec/version.h
	libavcodec/x86/h264_deblock.asm
	libavdevice/libdc1394.c
	libavdevice/v4l2.c
	libavformat/avformat.h
	libavformat/avio.c
	libavformat/avio.h
	libavformat/aviobuf.c
	libavformat/dv.c
	libavformat/mov.c
	libavformat/utils.c
	libavformat/version.h
	libavformat/wtv.c
	libavutil/Makefile
	libavutil/file.c
	libswscale/x86/input.asm
	libswscale/x86/swscale_mmx.c
	libswscale/x86/swscale_template.c
	tests/ref/lavf/ffm

Merged-by: Michael Niedermayer <michaelni@gmx.at>
2012-01-28 07:53:34 +01:00

229 lines
6.3 KiB
C

/*
* 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) {
av_log_ask_for_sample(s, "max_pages != " AV_STRINGIFY(MAX_PAGES) "\n");
return AVERROR_INVALIDDATA;
}
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 = 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:
av_log_ask_for_sample(s, NULL);
return AVERROR_INVALIDDATA;
}
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,
};