283 lines
8.2 KiB
C
283 lines
8.2 KiB
C
/*
|
|
* Packed Animation File demuxer
|
|
* Copyright (c) 2012 Paul B Mahol
|
|
*
|
|
* 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
|
|
*/
|
|
|
|
#include "libavutil/channel_layout.h"
|
|
#include "libavcodec/paf.h"
|
|
#include "avformat.h"
|
|
#include "internal.h"
|
|
|
|
#define MAGIC "Packed Animation File V1.0\n(c) 1992-96 Amazing Studio\x0a\x1a"
|
|
|
|
typedef struct PAFDemuxContext {
|
|
uint32_t buffer_size;
|
|
uint32_t frame_blks;
|
|
uint32_t nb_frames;
|
|
uint32_t start_offset;
|
|
uint32_t preload_count;
|
|
uint32_t max_video_blks;
|
|
uint32_t max_audio_blks;
|
|
|
|
uint32_t current_frame;
|
|
uint32_t current_frame_count;
|
|
uint32_t current_frame_block;
|
|
|
|
uint32_t *blocks_count_table;
|
|
uint32_t *frames_offset_table;
|
|
uint32_t *blocks_offset_table;
|
|
|
|
uint8_t *video_frame;
|
|
int video_size;
|
|
|
|
uint8_t *audio_frame;
|
|
uint8_t *temp_audio_frame;
|
|
int audio_size;
|
|
|
|
int got_audio;
|
|
} PAFDemuxContext;
|
|
|
|
static int read_probe(const AVProbeData *p)
|
|
{
|
|
if ((p->buf_size >= strlen(MAGIC)) &&
|
|
!memcmp(p->buf, MAGIC, strlen(MAGIC)))
|
|
return AVPROBE_SCORE_MAX;
|
|
return 0;
|
|
}
|
|
|
|
static int read_close(AVFormatContext *s)
|
|
{
|
|
PAFDemuxContext *p = s->priv_data;
|
|
|
|
av_freep(&p->blocks_count_table);
|
|
av_freep(&p->frames_offset_table);
|
|
av_freep(&p->blocks_offset_table);
|
|
av_freep(&p->video_frame);
|
|
av_freep(&p->audio_frame);
|
|
av_freep(&p->temp_audio_frame);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int read_table(AVFormatContext *s, uint32_t *table, uint32_t count)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < count; i++) {
|
|
if (avio_feof(s->pb))
|
|
return AVERROR_INVALIDDATA;
|
|
table[i] = avio_rl32(s->pb);
|
|
}
|
|
|
|
avio_skip(s->pb, 4 * (FFALIGN(count, 512) - count));
|
|
return 0;
|
|
}
|
|
|
|
static int read_header(AVFormatContext *s)
|
|
{
|
|
PAFDemuxContext *p = s->priv_data;
|
|
AVIOContext *pb = s->pb;
|
|
AVStream *ast, *vst;
|
|
int ret = 0;
|
|
|
|
avio_skip(pb, 132);
|
|
|
|
vst = avformat_new_stream(s, 0);
|
|
if (!vst)
|
|
return AVERROR(ENOMEM);
|
|
|
|
vst->start_time = 0;
|
|
vst->nb_frames =
|
|
vst->duration =
|
|
p->nb_frames = avio_rl32(pb);
|
|
avio_skip(pb, 4);
|
|
|
|
vst->codecpar->width = avio_rl32(pb);
|
|
vst->codecpar->height = avio_rl32(pb);
|
|
avio_skip(pb, 4);
|
|
|
|
vst->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
|
|
vst->codecpar->codec_tag = 0;
|
|
vst->codecpar->codec_id = AV_CODEC_ID_PAF_VIDEO;
|
|
avpriv_set_pts_info(vst, 64, 1, 10);
|
|
|
|
ast = avformat_new_stream(s, 0);
|
|
if (!ast)
|
|
return AVERROR(ENOMEM);
|
|
|
|
ast->start_time = 0;
|
|
ast->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
|
|
ast->codecpar->codec_tag = 0;
|
|
ast->codecpar->codec_id = AV_CODEC_ID_PAF_AUDIO;
|
|
ast->codecpar->channels = 2;
|
|
ast->codecpar->channel_layout = AV_CH_LAYOUT_STEREO;
|
|
ast->codecpar->sample_rate = 22050;
|
|
avpriv_set_pts_info(ast, 64, 1, 22050);
|
|
|
|
p->buffer_size = avio_rl32(pb);
|
|
p->preload_count = avio_rl32(pb);
|
|
p->frame_blks = avio_rl32(pb);
|
|
p->start_offset = avio_rl32(pb);
|
|
p->max_video_blks = avio_rl32(pb);
|
|
p->max_audio_blks = avio_rl32(pb);
|
|
|
|
if (avio_feof(pb))
|
|
return AVERROR_INVALIDDATA;
|
|
|
|
if (p->buffer_size < 175 ||
|
|
p->max_audio_blks < 2 ||
|
|
p->max_video_blks < 1 ||
|
|
p->frame_blks < 1 ||
|
|
p->nb_frames < 1 ||
|
|
p->preload_count < 1 ||
|
|
p->buffer_size > 2048 ||
|
|
p->max_video_blks > 2048 ||
|
|
p->max_audio_blks > 2048 ||
|
|
p->nb_frames > INT_MAX / sizeof(uint32_t) ||
|
|
p->frame_blks > INT_MAX / sizeof(uint32_t))
|
|
return AVERROR_INVALIDDATA;
|
|
|
|
p->blocks_count_table = av_mallocz(p->nb_frames *
|
|
sizeof(*p->blocks_count_table));
|
|
p->frames_offset_table = av_mallocz(p->nb_frames *
|
|
sizeof(*p->frames_offset_table));
|
|
p->blocks_offset_table = av_mallocz(p->frame_blks *
|
|
sizeof(*p->blocks_offset_table));
|
|
|
|
p->video_size = p->max_video_blks * p->buffer_size;
|
|
p->video_frame = av_mallocz(p->video_size);
|
|
|
|
p->audio_size = p->max_audio_blks * p->buffer_size;
|
|
p->audio_frame = av_mallocz(p->audio_size);
|
|
p->temp_audio_frame = av_mallocz(p->audio_size);
|
|
|
|
if (!p->blocks_count_table ||
|
|
!p->frames_offset_table ||
|
|
!p->blocks_offset_table ||
|
|
!p->video_frame ||
|
|
!p->audio_frame ||
|
|
!p->temp_audio_frame) {
|
|
ret = AVERROR(ENOMEM);
|
|
goto fail;
|
|
}
|
|
|
|
avio_seek(pb, p->buffer_size, SEEK_SET);
|
|
|
|
ret = read_table(s, p->blocks_count_table, p->nb_frames);
|
|
if (ret < 0)
|
|
goto fail;
|
|
ret = read_table(s, p->frames_offset_table, p->nb_frames);
|
|
if (ret < 0)
|
|
goto fail;
|
|
ret = read_table(s, p->blocks_offset_table, p->frame_blks);
|
|
if (ret < 0)
|
|
goto fail;
|
|
|
|
p->got_audio = 0;
|
|
p->current_frame = 0;
|
|
p->current_frame_block = 0;
|
|
|
|
avio_seek(pb, p->start_offset, SEEK_SET);
|
|
|
|
return 0;
|
|
|
|
fail:
|
|
read_close(s);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int read_packet(AVFormatContext *s, AVPacket *pkt)
|
|
{
|
|
PAFDemuxContext *p = s->priv_data;
|
|
AVIOContext *pb = s->pb;
|
|
uint32_t count, offset;
|
|
int size, i, ret;
|
|
|
|
if (p->current_frame >= p->nb_frames)
|
|
return AVERROR_EOF;
|
|
|
|
if (avio_feof(pb))
|
|
return AVERROR_EOF;
|
|
|
|
if (p->got_audio) {
|
|
if ((ret = av_new_packet(pkt, p->audio_size)) < 0)
|
|
return ret;
|
|
|
|
memcpy(pkt->data, p->temp_audio_frame, p->audio_size);
|
|
pkt->duration = PAF_SOUND_SAMPLES * (p->audio_size / PAF_SOUND_FRAME_SIZE);
|
|
pkt->flags |= AV_PKT_FLAG_KEY;
|
|
pkt->stream_index = 1;
|
|
p->got_audio = 0;
|
|
return pkt->size;
|
|
}
|
|
|
|
count = (p->current_frame == 0) ? p->preload_count
|
|
: p->blocks_count_table[p->current_frame - 1];
|
|
for (i = 0; i < count; i++) {
|
|
if (p->current_frame_block >= p->frame_blks)
|
|
return AVERROR_INVALIDDATA;
|
|
|
|
offset = p->blocks_offset_table[p->current_frame_block] & ~(1U << 31);
|
|
if (p->blocks_offset_table[p->current_frame_block] & (1U << 31)) {
|
|
if (offset > p->audio_size - p->buffer_size)
|
|
return AVERROR_INVALIDDATA;
|
|
|
|
avio_read(pb, p->audio_frame + offset, p->buffer_size);
|
|
if (offset == (p->max_audio_blks - 2) * p->buffer_size) {
|
|
memcpy(p->temp_audio_frame, p->audio_frame, p->audio_size);
|
|
p->got_audio = 1;
|
|
}
|
|
} else {
|
|
if (offset > p->video_size - p->buffer_size)
|
|
return AVERROR_INVALIDDATA;
|
|
|
|
avio_read(pb, p->video_frame + offset, p->buffer_size);
|
|
}
|
|
p->current_frame_block++;
|
|
}
|
|
|
|
if (p->frames_offset_table[p->current_frame] >= p->video_size)
|
|
return AVERROR_INVALIDDATA;
|
|
|
|
size = p->video_size - p->frames_offset_table[p->current_frame];
|
|
|
|
if ((ret = av_new_packet(pkt, size)) < 0)
|
|
return ret;
|
|
|
|
pkt->stream_index = 0;
|
|
pkt->duration = 1;
|
|
memcpy(pkt->data, p->video_frame + p->frames_offset_table[p->current_frame], size);
|
|
if (pkt->data[0] & 0x20)
|
|
pkt->flags |= AV_PKT_FLAG_KEY;
|
|
p->current_frame++;
|
|
|
|
return pkt->size;
|
|
}
|
|
|
|
AVInputFormat ff_paf_demuxer = {
|
|
.name = "paf",
|
|
.long_name = NULL_IF_CONFIG_SMALL("Amazing Studio Packed Animation File"),
|
|
.priv_data_size = sizeof(PAFDemuxContext),
|
|
.read_probe = read_probe,
|
|
.read_header = read_header,
|
|
.read_packet = read_packet,
|
|
.read_close = read_close,
|
|
};
|