2008-05-20 23:31:10 +00:00
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/*
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2008-05-26 03:57:07 +00:00
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* Flash Compatible Streaming Format demuxer
|
2009-01-19 15:46:40 +00:00
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* Copyright (c) 2000 Fabrice Bellard
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* Copyright (c) 2003 Tinic Uro
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2008-05-20 23:31:10 +00:00
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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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2015-12-02 23:41:00 +00:00
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#include "config.h"
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|
|
|
|
|
|
#if CONFIG_ZLIB
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|
|
|
#include <zlib.h>
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|
|
|
#endif
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|
|
|
2012-10-12 21:20:31 +00:00
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|
|
#include "libavutil/avassert.h"
|
2012-04-07 22:42:26 +00:00
|
|
|
#include "libavutil/channel_layout.h"
|
2012-10-12 21:20:31 +00:00
|
|
|
#include "libavutil/imgutils.h"
|
2015-08-18 00:45:35 +00:00
|
|
|
#include "libavutil/internal.h"
|
2009-01-11 22:19:48 +00:00
|
|
|
#include "libavutil/intreadwrite.h"
|
2014-12-21 19:50:59 +00:00
|
|
|
#include "libavcodec/get_bits.h"
|
2008-05-20 23:31:10 +00:00
|
|
|
#include "swf.h"
|
2020-10-07 20:21:27 +00:00
|
|
|
#include "flv.h"
|
2008-05-20 23:31:10 +00:00
|
|
|
|
2020-09-20 11:21:28 +00:00
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|
|
typedef struct SWFDecContext {
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|
|
|
int samples_per_frame;
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|
|
|
int frame_rate;
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|
|
|
#if CONFIG_ZLIB
|
|
|
|
#define ZBUF_SIZE 4096
|
|
|
|
AVIOContext *zpb;
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|
|
|
uint8_t *zbuf_in;
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|
|
|
uint8_t *zbuf_out;
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|
|
|
z_stream zstream;
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|
|
|
#endif
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|
|
} SWFDecContext;
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|
2012-08-08 13:51:59 +00:00
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|
|
static const AVCodecTag swf_audio_codec_tags[] = {
|
2012-08-15 07:14:35 +00:00
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|
{ AV_CODEC_ID_PCM_S16LE, 0x00 },
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|
|
{ AV_CODEC_ID_ADPCM_SWF, 0x01 },
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|
|
{ AV_CODEC_ID_MP3, 0x02 },
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|
|
{ AV_CODEC_ID_PCM_S16LE, 0x03 },
|
2021-03-16 20:11:45 +00:00
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|
|
{ AV_CODEC_ID_NELLYMOSER, 0x06 },
|
2012-08-15 07:14:35 +00:00
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|
|
{ AV_CODEC_ID_NONE, 0 },
|
2012-08-08 13:51:59 +00:00
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|
|
};
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|
2011-02-20 10:04:12 +00:00
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|
static int get_swf_tag(AVIOContext *pb, int *len_ptr)
|
2008-05-20 23:31:10 +00:00
|
|
|
{
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|
int tag, len;
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|
2014-08-07 20:12:41 +00:00
|
|
|
if (avio_feof(pb))
|
2011-09-27 12:48:56 +00:00
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|
return AVERROR_EOF;
|
2008-05-20 23:31:10 +00:00
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|
2011-02-21 15:43:01 +00:00
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|
tag = avio_rl16(pb);
|
2008-05-20 23:31:10 +00:00
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|
len = tag & 0x3f;
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tag = tag >> 6;
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|
|
|
if (len == 0x3f) {
|
2011-02-21 15:43:01 +00:00
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|
|
len = avio_rl32(pb);
|
2008-05-20 23:31:10 +00:00
|
|
|
}
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|
|
|
*len_ptr = len;
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|
return tag;
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|
|
|
}
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|
2019-03-21 00:18:37 +00:00
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|
static int swf_probe(const AVProbeData *p)
|
2008-05-20 23:31:10 +00:00
|
|
|
{
|
2014-12-21 19:50:59 +00:00
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|
|
GetBitContext gb;
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|
|
int len, xmin, xmax, ymin, ymax;
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|
|
|
2013-11-06 11:44:02 +00:00
|
|
|
if(p->buf_size < 15)
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|
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|
return 0;
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|
2008-05-20 23:31:10 +00:00
|
|
|
/* check file header */
|
2013-11-10 11:53:38 +00:00
|
|
|
if ( AV_RB24(p->buf) != AV_RB24("CWS")
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|
|
|
&& AV_RB24(p->buf) != AV_RB24("FWS"))
|
2008-05-20 23:31:10 +00:00
|
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|
return 0;
|
2013-11-10 11:53:38 +00:00
|
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|
|
2015-08-04 19:32:01 +00:00
|
|
|
if ( AV_RB24(p->buf) == AV_RB24("CWS")
|
|
|
|
&& p->buf[3] <= 20)
|
|
|
|
return AVPROBE_SCORE_MAX / 4 + 1;
|
|
|
|
|
2020-09-20 06:46:16 +00:00
|
|
|
if (init_get_bits8(&gb, p->buf + 8, p->buf_size - 8) < 0)
|
2015-09-03 07:47:39 +00:00
|
|
|
return 0;
|
2014-12-21 19:50:59 +00:00
|
|
|
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|
|
|
len = get_bits(&gb, 5);
|
|
|
|
if (!len)
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|
|
|
return 0;
|
|
|
|
xmin = get_bits_long(&gb, len);
|
|
|
|
xmax = get_bits_long(&gb, len);
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|
|
|
ymin = get_bits_long(&gb, len);
|
|
|
|
ymax = get_bits_long(&gb, len);
|
|
|
|
if (xmin || ymin || !xmax || !ymax)
|
|
|
|
return 0;
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|
|
|
|
|
|
|
if (p->buf[3] >= 20 || xmax < 16 || ymax < 16)
|
2013-11-10 11:53:38 +00:00
|
|
|
return AVPROBE_SCORE_MAX / 4;
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|
|
|
|
2018-01-18 20:25:49 +00:00
|
|
|
return AVPROBE_SCORE_EXTENSION + 1;
|
2008-05-20 23:31:10 +00:00
|
|
|
}
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|
|
|
|
2012-04-02 23:33:03 +00:00
|
|
|
#if CONFIG_ZLIB
|
|
|
|
static int zlib_refill(void *opaque, uint8_t *buf, int buf_size)
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|
|
|
{
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|
|
|
AVFormatContext *s = opaque;
|
2020-09-20 11:21:28 +00:00
|
|
|
SWFDecContext *swf = s->priv_data;
|
2012-04-02 23:33:03 +00:00
|
|
|
z_stream *z = &swf->zstream;
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|
|
int ret;
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retry:
|
|
|
|
if (!z->avail_in) {
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int n = avio_read(s->pb, swf->zbuf_in, ZBUF_SIZE);
|
2012-10-12 16:23:46 +00:00
|
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|
if (n < 0)
|
2012-04-02 23:33:03 +00:00
|
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|
return n;
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|
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|
z->next_in = swf->zbuf_in;
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|
z->avail_in = n;
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}
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|
z->next_out = buf;
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z->avail_out = buf_size;
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|
ret = inflate(z, Z_NO_FLUSH);
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if (ret == Z_STREAM_END)
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return AVERROR_EOF;
|
2016-08-19 08:28:22 +00:00
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if (ret != Z_OK)
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return AVERROR(EINVAL);
|
2012-04-02 23:33:03 +00:00
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|
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|
if (buf_size - z->avail_out == 0)
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|
goto retry;
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|
return buf_size - z->avail_out;
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|
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|
}
|
2020-09-20 10:28:03 +00:00
|
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|
static av_cold int swf_read_close(AVFormatContext *avctx);
|
2012-04-02 23:33:03 +00:00
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#endif
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|
2012-01-12 12:20:36 +00:00
|
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static int swf_read_header(AVFormatContext *s)
|
2008-05-20 23:31:10 +00:00
|
|
|
{
|
2020-09-20 11:21:28 +00:00
|
|
|
SWFDecContext *swf = s->priv_data;
|
2011-02-20 10:04:12 +00:00
|
|
|
AVIOContext *pb = s->pb;
|
2008-05-20 23:31:10 +00:00
|
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|
int nbits, len, tag;
|
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|
|
|
2011-02-21 15:43:01 +00:00
|
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|
tag = avio_rb32(pb) & 0xffffff00;
|
2012-04-02 23:33:03 +00:00
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|
avio_rl32(pb);
|
2008-05-20 23:31:10 +00:00
|
|
|
|
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|
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if (tag == MKBETAG('C', 'W', 'S', 0)) {
|
2012-04-02 23:33:03 +00:00
|
|
|
av_log(s, AV_LOG_INFO, "SWF compressed file detected\n");
|
|
|
|
#if CONFIG_ZLIB
|
|
|
|
if (inflateInit(&swf->zstream) != Z_OK) {
|
|
|
|
av_log(s, AV_LOG_ERROR, "Unable to init zlib context\n");
|
|
|
|
return AVERROR(EINVAL);
|
|
|
|
}
|
2020-09-20 10:28:03 +00:00
|
|
|
if (!(swf->zbuf_in = av_malloc(ZBUF_SIZE)) ||
|
|
|
|
!(swf->zbuf_out = av_malloc(ZBUF_SIZE)) ||
|
|
|
|
!(swf->zpb = avio_alloc_context(swf->zbuf_out, ZBUF_SIZE, 0,
|
|
|
|
s, zlib_refill, NULL, NULL))) {
|
|
|
|
swf_read_close(s);
|
|
|
|
return AVERROR(ENOMEM);
|
|
|
|
}
|
|
|
|
swf->zpb->seekable = 0;
|
2012-04-02 23:33:03 +00:00
|
|
|
pb = swf->zpb;
|
|
|
|
#else
|
|
|
|
av_log(s, AV_LOG_ERROR, "zlib support is required to read SWF compressed files\n");
|
2008-05-20 23:31:10 +00:00
|
|
|
return AVERROR(EIO);
|
2012-04-02 23:33:03 +00:00
|
|
|
#endif
|
|
|
|
} else if (tag != MKBETAG('F', 'W', 'S', 0))
|
2008-05-20 23:31:10 +00:00
|
|
|
return AVERROR(EIO);
|
|
|
|
/* skip rectangle size */
|
2011-02-21 15:43:01 +00:00
|
|
|
nbits = avio_r8(pb) >> 3;
|
2008-05-20 23:31:10 +00:00
|
|
|
len = (4 * nbits - 3 + 7) / 8;
|
2011-03-15 08:14:38 +00:00
|
|
|
avio_skip(pb, len);
|
2011-02-21 15:43:01 +00:00
|
|
|
swf->frame_rate = avio_rl16(pb); /* 8.8 fixed */
|
|
|
|
avio_rl16(pb); /* frame count */
|
2008-05-20 23:31:10 +00:00
|
|
|
|
|
|
|
swf->samples_per_frame = 0;
|
|
|
|
s->ctx_flags |= AVFMTCTX_NOHEADER;
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2013-02-20 20:40:52 +00:00
|
|
|
static AVStream *create_new_audio_stream(AVFormatContext *s, int id, int info)
|
|
|
|
{
|
2013-02-20 20:43:55 +00:00
|
|
|
int sample_rate_code, sample_size_code;
|
2013-02-20 20:40:52 +00:00
|
|
|
AVStream *ast = avformat_new_stream(s, NULL);
|
|
|
|
if (!ast)
|
|
|
|
return NULL;
|
|
|
|
ast->id = id;
|
|
|
|
if (info & 1) {
|
2016-04-10 19:58:15 +00:00
|
|
|
ast->codecpar->channels = 2;
|
|
|
|
ast->codecpar->channel_layout = AV_CH_LAYOUT_STEREO;
|
2013-02-20 20:40:52 +00:00
|
|
|
} else {
|
2016-04-10 19:58:15 +00:00
|
|
|
ast->codecpar->channels = 1;
|
|
|
|
ast->codecpar->channel_layout = AV_CH_LAYOUT_MONO;
|
2013-02-20 20:40:52 +00:00
|
|
|
}
|
2016-04-10 19:58:15 +00:00
|
|
|
ast->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
|
|
|
|
ast->codecpar->codec_id = ff_codec_get_id(swf_audio_codec_tags, info>>4 & 15);
|
2021-08-24 17:41:16 +00:00
|
|
|
ffstream(ast)->need_parsing = AVSTREAM_PARSE_FULL;
|
2013-02-20 20:40:52 +00:00
|
|
|
sample_rate_code = info>>2 & 3;
|
2013-02-20 20:43:55 +00:00
|
|
|
sample_size_code = info>>1 & 1;
|
2016-04-10 19:58:15 +00:00
|
|
|
if (!sample_size_code && ast->codecpar->codec_id == AV_CODEC_ID_PCM_S16LE)
|
|
|
|
ast->codecpar->codec_id = AV_CODEC_ID_PCM_U8;
|
|
|
|
ast->codecpar->sample_rate = 44100 >> (3 - sample_rate_code);
|
|
|
|
avpriv_set_pts_info(ast, 64, 1, ast->codecpar->sample_rate);
|
2013-02-20 20:40:52 +00:00
|
|
|
return ast;
|
|
|
|
}
|
|
|
|
|
2008-05-20 23:31:10 +00:00
|
|
|
static int swf_read_packet(AVFormatContext *s, AVPacket *pkt)
|
|
|
|
{
|
2020-09-20 11:21:28 +00:00
|
|
|
SWFDecContext *swf = s->priv_data;
|
2011-02-20 10:04:12 +00:00
|
|
|
AVIOContext *pb = s->pb;
|
2008-05-20 23:31:10 +00:00
|
|
|
AVStream *vst = NULL, *ast = NULL, *st = 0;
|
2012-02-23 19:53:27 +00:00
|
|
|
int tag, len, i, frame, v, res;
|
2008-05-20 23:31:10 +00:00
|
|
|
|
2012-04-02 23:33:03 +00:00
|
|
|
#if CONFIG_ZLIB
|
|
|
|
if (swf->zpb)
|
|
|
|
pb = swf->zpb;
|
|
|
|
#endif
|
|
|
|
|
2008-05-20 23:31:10 +00:00
|
|
|
for(;;) {
|
2011-03-03 19:11:45 +00:00
|
|
|
uint64_t pos = avio_tell(pb);
|
2008-05-20 23:31:10 +00:00
|
|
|
tag = get_swf_tag(pb, &len);
|
|
|
|
if (tag < 0)
|
2011-09-27 12:48:56 +00:00
|
|
|
return tag;
|
2012-12-10 16:20:32 +00:00
|
|
|
if (len < 0) {
|
2012-12-10 17:44:09 +00:00
|
|
|
av_log(s, AV_LOG_ERROR, "invalid tag length: %d\n", len);
|
2012-12-10 16:20:32 +00:00
|
|
|
return AVERROR_INVALIDDATA;
|
|
|
|
}
|
2009-03-13 19:37:05 +00:00
|
|
|
if (tag == TAG_VIDEOSTREAM) {
|
2011-02-21 15:43:01 +00:00
|
|
|
int ch_id = avio_rl16(pb);
|
2009-03-13 19:37:05 +00:00
|
|
|
len -= 2;
|
|
|
|
|
|
|
|
for (i=0; i<s->nb_streams; i++) {
|
|
|
|
st = s->streams[i];
|
lavf: replace AVStream.codec with AVStream.codecpar
Currently, AVStream contains an embedded AVCodecContext instance, which
is used by demuxers to export stream parameters to the caller and by
muxers to receive stream parameters from the caller. It is also used
internally as the codec context that is passed to parsers.
In addition, it is also widely used by the callers as the decoding (when
demuxer) or encoding (when muxing) context, though this has been
officially discouraged since Libav 11.
There are multiple important problems with this approach:
- the fields in AVCodecContext are in general one of
* stream parameters
* codec options
* codec state
However, it's not clear which ones are which. It is consequently
unclear which fields are a demuxer allowed to set or a muxer allowed to
read. This leads to erratic behaviour depending on whether decoding or
encoding is being performed or not (and whether it uses the AVStream
embedded codec context).
- various synchronization issues arising from the fact that the same
context is used by several different APIs (muxers/demuxers,
parsers, bitstream filters and encoders/decoders) simultaneously, with
there being no clear rules for who can modify what and the different
processes being typically delayed with respect to each other.
- avformat_find_stream_info() making it necessary to support opening
and closing a single codec context multiple times, thus
complicating the semantics of freeing various allocated objects in the
codec context.
Those problems are resolved by replacing the AVStream embedded codec
context with a newly added AVCodecParameters instance, which stores only
the stream parameters exported by the demuxers or read by the muxers.
2014-06-18 18:42:52 +00:00
|
|
|
if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO && st->id == ch_id)
|
2009-03-13 19:37:05 +00:00
|
|
|
goto skip;
|
|
|
|
}
|
|
|
|
|
2011-02-21 15:43:01 +00:00
|
|
|
avio_rl16(pb);
|
|
|
|
avio_rl16(pb);
|
|
|
|
avio_rl16(pb);
|
|
|
|
avio_r8(pb);
|
2008-05-20 23:31:10 +00:00
|
|
|
/* Check for FLV1 */
|
2011-06-18 09:43:24 +00:00
|
|
|
vst = avformat_new_stream(s, NULL);
|
2008-05-20 23:31:10 +00:00
|
|
|
if (!vst)
|
2012-10-11 21:59:54 +00:00
|
|
|
return AVERROR(ENOMEM);
|
2011-06-18 09:43:24 +00:00
|
|
|
vst->id = ch_id;
|
lavf: replace AVStream.codec with AVStream.codecpar
Currently, AVStream contains an embedded AVCodecContext instance, which
is used by demuxers to export stream parameters to the caller and by
muxers to receive stream parameters from the caller. It is also used
internally as the codec context that is passed to parsers.
In addition, it is also widely used by the callers as the decoding (when
demuxer) or encoding (when muxing) context, though this has been
officially discouraged since Libav 11.
There are multiple important problems with this approach:
- the fields in AVCodecContext are in general one of
* stream parameters
* codec options
* codec state
However, it's not clear which ones are which. It is consequently
unclear which fields are a demuxer allowed to set or a muxer allowed to
read. This leads to erratic behaviour depending on whether decoding or
encoding is being performed or not (and whether it uses the AVStream
embedded codec context).
- various synchronization issues arising from the fact that the same
context is used by several different APIs (muxers/demuxers,
parsers, bitstream filters and encoders/decoders) simultaneously, with
there being no clear rules for who can modify what and the different
processes being typically delayed with respect to each other.
- avformat_find_stream_info() making it necessary to support opening
and closing a single codec context multiple times, thus
complicating the semantics of freeing various allocated objects in the
codec context.
Those problems are resolved by replacing the AVStream embedded codec
context with a newly added AVCodecParameters instance, which stores only
the stream parameters exported by the demuxers or read by the muxers.
2014-06-18 18:42:52 +00:00
|
|
|
vst->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
|
|
|
|
vst->codecpar->codec_id = ff_codec_get_id(ff_swf_codec_tags, avio_r8(pb));
|
2011-11-29 18:28:15 +00:00
|
|
|
avpriv_set_pts_info(vst, 16, 256, swf->frame_rate);
|
2009-03-13 19:37:05 +00:00
|
|
|
len -= 8;
|
|
|
|
} else if (tag == TAG_STREAMHEAD || tag == TAG_STREAMHEAD2) {
|
2008-05-20 23:31:10 +00:00
|
|
|
/* streaming found */
|
2009-03-13 19:37:05 +00:00
|
|
|
|
|
|
|
for (i=0; i<s->nb_streams; i++) {
|
|
|
|
st = s->streams[i];
|
lavf: replace AVStream.codec with AVStream.codecpar
Currently, AVStream contains an embedded AVCodecContext instance, which
is used by demuxers to export stream parameters to the caller and by
muxers to receive stream parameters from the caller. It is also used
internally as the codec context that is passed to parsers.
In addition, it is also widely used by the callers as the decoding (when
demuxer) or encoding (when muxing) context, though this has been
officially discouraged since Libav 11.
There are multiple important problems with this approach:
- the fields in AVCodecContext are in general one of
* stream parameters
* codec options
* codec state
However, it's not clear which ones are which. It is consequently
unclear which fields are a demuxer allowed to set or a muxer allowed to
read. This leads to erratic behaviour depending on whether decoding or
encoding is being performed or not (and whether it uses the AVStream
embedded codec context).
- various synchronization issues arising from the fact that the same
context is used by several different APIs (muxers/demuxers,
parsers, bitstream filters and encoders/decoders) simultaneously, with
there being no clear rules for who can modify what and the different
processes being typically delayed with respect to each other.
- avformat_find_stream_info() making it necessary to support opening
and closing a single codec context multiple times, thus
complicating the semantics of freeing various allocated objects in the
codec context.
Those problems are resolved by replacing the AVStream embedded codec
context with a newly added AVCodecParameters instance, which stores only
the stream parameters exported by the demuxers or read by the muxers.
2014-06-18 18:42:52 +00:00
|
|
|
if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO && st->id == -1)
|
2009-03-13 19:37:05 +00:00
|
|
|
goto skip;
|
|
|
|
}
|
|
|
|
|
2011-02-21 15:43:01 +00:00
|
|
|
avio_r8(pb);
|
|
|
|
v = avio_r8(pb);
|
|
|
|
swf->samples_per_frame = avio_rl16(pb);
|
2013-02-20 20:40:52 +00:00
|
|
|
ast = create_new_audio_stream(s, -1, v); /* -1 to avoid clash with video stream ch_id */
|
2008-05-20 23:31:10 +00:00
|
|
|
if (!ast)
|
2012-10-11 21:59:54 +00:00
|
|
|
return AVERROR(ENOMEM);
|
2008-05-20 23:31:10 +00:00
|
|
|
len -= 4;
|
2012-10-12 01:48:44 +00:00
|
|
|
} else if (tag == TAG_DEFINESOUND) {
|
|
|
|
/* audio stream */
|
|
|
|
int ch_id = avio_rl16(pb);
|
|
|
|
|
|
|
|
for (i=0; i<s->nb_streams; i++) {
|
|
|
|
st = s->streams[i];
|
2016-04-10 19:58:15 +00:00
|
|
|
if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO && st->id == ch_id)
|
2012-10-12 01:48:44 +00:00
|
|
|
goto skip;
|
|
|
|
}
|
|
|
|
|
|
|
|
// FIXME: The entire audio stream is stored in a single chunk/tag. Normally,
|
|
|
|
// these are smaller audio streams in DEFINESOUND tags, but it's technically
|
|
|
|
// possible they could be huge. Break it up into multiple packets if it's big.
|
|
|
|
v = avio_r8(pb);
|
2013-02-20 20:40:52 +00:00
|
|
|
ast = create_new_audio_stream(s, ch_id, v);
|
2012-10-12 01:48:44 +00:00
|
|
|
if (!ast)
|
2012-10-11 21:59:54 +00:00
|
|
|
return AVERROR(ENOMEM);
|
2012-10-12 01:48:44 +00:00
|
|
|
ast->duration = avio_rl32(pb); // number of samples
|
|
|
|
if (((v>>4) & 15) == 2) { // MP3 sound data record
|
2021-08-24 17:41:16 +00:00
|
|
|
ffstream(ast)->skip_samples = avio_rl16(pb);
|
2012-10-12 01:48:44 +00:00
|
|
|
len -= 2;
|
|
|
|
}
|
|
|
|
len -= 7;
|
|
|
|
if ((res = av_get_packet(pb, pkt, len)) < 0)
|
|
|
|
return res;
|
|
|
|
pkt->pos = pos;
|
|
|
|
pkt->stream_index = ast->index;
|
|
|
|
return pkt->size;
|
2008-05-20 23:31:10 +00:00
|
|
|
} else if (tag == TAG_VIDEOFRAME) {
|
2011-02-21 15:43:01 +00:00
|
|
|
int ch_id = avio_rl16(pb);
|
2008-05-20 23:31:10 +00:00
|
|
|
len -= 2;
|
|
|
|
for(i=0; i<s->nb_streams; i++) {
|
|
|
|
st = s->streams[i];
|
lavf: replace AVStream.codec with AVStream.codecpar
Currently, AVStream contains an embedded AVCodecContext instance, which
is used by demuxers to export stream parameters to the caller and by
muxers to receive stream parameters from the caller. It is also used
internally as the codec context that is passed to parsers.
In addition, it is also widely used by the callers as the decoding (when
demuxer) or encoding (when muxing) context, though this has been
officially discouraged since Libav 11.
There are multiple important problems with this approach:
- the fields in AVCodecContext are in general one of
* stream parameters
* codec options
* codec state
However, it's not clear which ones are which. It is consequently
unclear which fields are a demuxer allowed to set or a muxer allowed to
read. This leads to erratic behaviour depending on whether decoding or
encoding is being performed or not (and whether it uses the AVStream
embedded codec context).
- various synchronization issues arising from the fact that the same
context is used by several different APIs (muxers/demuxers,
parsers, bitstream filters and encoders/decoders) simultaneously, with
there being no clear rules for who can modify what and the different
processes being typically delayed with respect to each other.
- avformat_find_stream_info() making it necessary to support opening
and closing a single codec context multiple times, thus
complicating the semantics of freeing various allocated objects in the
codec context.
Those problems are resolved by replacing the AVStream embedded codec
context with a newly added AVCodecParameters instance, which stores only
the stream parameters exported by the demuxers or read by the muxers.
2014-06-18 18:42:52 +00:00
|
|
|
if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO && st->id == ch_id) {
|
2020-10-07 20:21:27 +00:00
|
|
|
int pkt_flags = 0;
|
2011-02-21 15:43:01 +00:00
|
|
|
frame = avio_rl16(pb);
|
2012-12-10 17:44:09 +00:00
|
|
|
len -= 2;
|
|
|
|
if (len <= 0)
|
|
|
|
goto skip;
|
2020-10-07 20:21:27 +00:00
|
|
|
if (st->codecpar->codec_id == AV_CODEC_ID_FLASHSV) {
|
|
|
|
unsigned flags = avio_r8(pb);
|
|
|
|
len--;
|
|
|
|
if (len <= 0)
|
|
|
|
goto skip;
|
|
|
|
pkt_flags |= (flags & FLV_VIDEO_FRAMETYPE_MASK) == FLV_FRAME_KEY ? AV_PKT_FLAG_KEY : 0;
|
|
|
|
}
|
2012-12-10 17:44:09 +00:00
|
|
|
if ((res = av_get_packet(pb, pkt, len)) < 0)
|
2012-02-23 19:53:27 +00:00
|
|
|
return res;
|
2009-03-13 22:26:45 +00:00
|
|
|
pkt->pos = pos;
|
2008-05-20 23:31:10 +00:00
|
|
|
pkt->pts = frame;
|
|
|
|
pkt->stream_index = st->index;
|
2020-10-07 20:21:27 +00:00
|
|
|
pkt->flags |= pkt_flags;
|
2008-05-20 23:31:10 +00:00
|
|
|
return pkt->size;
|
|
|
|
}
|
|
|
|
}
|
2012-10-12 21:20:31 +00:00
|
|
|
} else if (tag == TAG_DEFINEBITSLOSSLESS || tag == TAG_DEFINEBITSLOSSLESS2) {
|
|
|
|
#if CONFIG_ZLIB
|
|
|
|
long out_len;
|
|
|
|
uint8_t *buf = NULL, *zbuf = NULL, *pal;
|
|
|
|
uint32_t colormap[AVPALETTE_COUNT] = {0};
|
|
|
|
const int alpha_bmp = tag == TAG_DEFINEBITSLOSSLESS2;
|
|
|
|
const int colormapbpp = 3 + alpha_bmp;
|
|
|
|
int linesize, colormapsize = 0;
|
|
|
|
|
|
|
|
const int ch_id = avio_rl16(pb);
|
|
|
|
const int bmp_fmt = avio_r8(pb);
|
|
|
|
const int width = avio_rl16(pb);
|
|
|
|
const int height = avio_rl16(pb);
|
2014-09-02 14:42:33 +00:00
|
|
|
int pix_fmt;
|
2012-10-12 21:20:31 +00:00
|
|
|
|
|
|
|
len -= 2+1+2+2;
|
|
|
|
|
|
|
|
switch (bmp_fmt) {
|
|
|
|
case 3: // PAL-8
|
|
|
|
linesize = width;
|
|
|
|
colormapsize = avio_r8(pb) + 1;
|
|
|
|
len--;
|
|
|
|
break;
|
|
|
|
case 4: // RGB15
|
|
|
|
linesize = width * 2;
|
|
|
|
break;
|
|
|
|
case 5: // RGB24 (0RGB)
|
|
|
|
linesize = width * 4;
|
|
|
|
break;
|
|
|
|
default:
|
|
|
|
av_log(s, AV_LOG_ERROR, "invalid bitmap format %d, skipped\n", bmp_fmt);
|
|
|
|
goto bitmap_end_skip;
|
|
|
|
}
|
|
|
|
|
|
|
|
linesize = FFALIGN(linesize, 4);
|
|
|
|
|
|
|
|
if (av_image_check_size(width, height, 0, s) < 0 ||
|
|
|
|
linesize >= INT_MAX / height ||
|
|
|
|
linesize * height >= INT_MAX - colormapsize * colormapbpp) {
|
|
|
|
av_log(s, AV_LOG_ERROR, "invalid frame size %dx%d\n", width, height);
|
|
|
|
goto bitmap_end_skip;
|
|
|
|
}
|
|
|
|
|
|
|
|
out_len = colormapsize * colormapbpp + linesize * height;
|
|
|
|
|
2015-08-18 00:45:35 +00:00
|
|
|
ff_dlog(s, "bitmap: ch=%d fmt=%d %dx%d (linesize=%d) len=%d->%ld pal=%d\n",
|
2012-10-12 21:20:31 +00:00
|
|
|
ch_id, bmp_fmt, width, height, linesize, len, out_len, colormapsize);
|
|
|
|
|
2021-01-21 23:39:19 +00:00
|
|
|
if (len * 17373LL < out_len)
|
|
|
|
goto bitmap_end_skip;
|
|
|
|
|
2012-10-12 21:20:31 +00:00
|
|
|
zbuf = av_malloc(len);
|
2020-11-18 00:29:23 +00:00
|
|
|
if (!zbuf) {
|
2012-10-12 21:20:31 +00:00
|
|
|
res = AVERROR(ENOMEM);
|
|
|
|
goto bitmap_end;
|
|
|
|
}
|
|
|
|
|
|
|
|
len = avio_read(pb, zbuf, len);
|
2020-11-18 00:29:23 +00:00
|
|
|
if (len < 0)
|
|
|
|
goto bitmap_end_skip;
|
|
|
|
|
|
|
|
buf = av_malloc(out_len);
|
|
|
|
if (!buf) {
|
|
|
|
res = AVERROR(ENOMEM);
|
|
|
|
goto bitmap_end;
|
|
|
|
}
|
|
|
|
if ((res = uncompress(buf, &out_len, zbuf, len)) != Z_OK) {
|
2012-10-12 21:20:31 +00:00
|
|
|
av_log(s, AV_LOG_WARNING, "Failed to uncompress one bitmap\n");
|
|
|
|
goto bitmap_end_skip;
|
|
|
|
}
|
|
|
|
|
|
|
|
for (i = 0; i < s->nb_streams; i++) {
|
|
|
|
st = s->streams[i];
|
2016-04-10 19:58:15 +00:00
|
|
|
if (st->codecpar->codec_id == AV_CODEC_ID_RAWVIDEO && st->id == -3)
|
2012-10-12 21:20:31 +00:00
|
|
|
break;
|
|
|
|
}
|
|
|
|
if (i == s->nb_streams) {
|
|
|
|
vst = avformat_new_stream(s, NULL);
|
|
|
|
if (!vst) {
|
|
|
|
res = AVERROR(ENOMEM);
|
|
|
|
goto bitmap_end;
|
|
|
|
}
|
|
|
|
vst->id = -3; /* -3 to avoid clash with video stream and audio stream */
|
2016-04-10 19:58:15 +00:00
|
|
|
vst->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
|
|
|
|
vst->codecpar->codec_id = AV_CODEC_ID_RAWVIDEO;
|
2012-10-12 21:20:31 +00:00
|
|
|
avpriv_set_pts_info(vst, 64, 256, swf->frame_rate);
|
|
|
|
st = vst;
|
|
|
|
}
|
|
|
|
|
|
|
|
if ((res = av_new_packet(pkt, out_len - colormapsize * colormapbpp)) < 0)
|
|
|
|
goto bitmap_end;
|
2016-04-10 19:58:15 +00:00
|
|
|
if (!st->codecpar->width && !st->codecpar->height) {
|
|
|
|
st->codecpar->width = width;
|
|
|
|
st->codecpar->height = height;
|
2014-09-02 03:22:26 +00:00
|
|
|
} else {
|
|
|
|
ff_add_param_change(pkt, 0, 0, 0, width, height);
|
|
|
|
}
|
2012-10-12 21:20:31 +00:00
|
|
|
pkt->pos = pos;
|
|
|
|
pkt->stream_index = st->index;
|
|
|
|
|
2016-08-19 01:04:57 +00:00
|
|
|
if (linesize * height > pkt->size) {
|
|
|
|
res = AVERROR_INVALIDDATA;
|
|
|
|
goto bitmap_end;
|
|
|
|
}
|
|
|
|
|
2012-10-12 21:20:31 +00:00
|
|
|
switch (bmp_fmt) {
|
|
|
|
case 3:
|
2014-09-02 14:42:33 +00:00
|
|
|
pix_fmt = AV_PIX_FMT_PAL8;
|
2012-10-12 21:20:31 +00:00
|
|
|
for (i = 0; i < colormapsize; i++)
|
|
|
|
if (alpha_bmp) colormap[i] = buf[3]<<24 | AV_RB24(buf + 4*i);
|
|
|
|
else colormap[i] = 0xffU <<24 | AV_RB24(buf + 3*i);
|
|
|
|
pal = av_packet_new_side_data(pkt, AV_PKT_DATA_PALETTE, AVPALETTE_SIZE);
|
|
|
|
if (!pal) {
|
|
|
|
res = AVERROR(ENOMEM);
|
|
|
|
goto bitmap_end;
|
|
|
|
}
|
|
|
|
memcpy(pal, colormap, AVPALETTE_SIZE);
|
|
|
|
break;
|
|
|
|
case 4:
|
2014-09-02 14:42:33 +00:00
|
|
|
pix_fmt = AV_PIX_FMT_RGB555;
|
2012-10-12 21:20:31 +00:00
|
|
|
break;
|
|
|
|
case 5:
|
2014-09-02 14:42:33 +00:00
|
|
|
pix_fmt = alpha_bmp ? AV_PIX_FMT_ARGB : AV_PIX_FMT_0RGB;
|
2012-10-12 21:20:31 +00:00
|
|
|
break;
|
|
|
|
default:
|
|
|
|
av_assert0(0);
|
|
|
|
}
|
2016-04-10 19:58:15 +00:00
|
|
|
if (st->codecpar->format != AV_PIX_FMT_NONE && st->codecpar->format != pix_fmt) {
|
2014-09-02 14:42:33 +00:00
|
|
|
av_log(s, AV_LOG_ERROR, "pixel format change unsupported\n");
|
2015-07-08 09:30:21 +00:00
|
|
|
} else
|
2016-04-10 19:58:15 +00:00
|
|
|
st->codecpar->format = pix_fmt;
|
2012-11-12 18:29:08 +00:00
|
|
|
|
2012-10-12 21:20:31 +00:00
|
|
|
memcpy(pkt->data, buf + colormapsize*colormapbpp, linesize * height);
|
|
|
|
|
|
|
|
res = pkt->size;
|
|
|
|
|
|
|
|
bitmap_end:
|
|
|
|
av_freep(&zbuf);
|
|
|
|
av_freep(&buf);
|
|
|
|
return res;
|
|
|
|
bitmap_end_skip:
|
|
|
|
av_freep(&zbuf);
|
|
|
|
av_freep(&buf);
|
|
|
|
#else
|
|
|
|
av_log(s, AV_LOG_ERROR, "this file requires zlib support compiled in\n");
|
|
|
|
#endif
|
2008-05-20 23:31:10 +00:00
|
|
|
} else if (tag == TAG_STREAMBLOCK) {
|
2009-03-13 19:37:05 +00:00
|
|
|
for (i = 0; i < s->nb_streams; i++) {
|
|
|
|
st = s->streams[i];
|
lavf: replace AVStream.codec with AVStream.codecpar
Currently, AVStream contains an embedded AVCodecContext instance, which
is used by demuxers to export stream parameters to the caller and by
muxers to receive stream parameters from the caller. It is also used
internally as the codec context that is passed to parsers.
In addition, it is also widely used by the callers as the decoding (when
demuxer) or encoding (when muxing) context, though this has been
officially discouraged since Libav 11.
There are multiple important problems with this approach:
- the fields in AVCodecContext are in general one of
* stream parameters
* codec options
* codec state
However, it's not clear which ones are which. It is consequently
unclear which fields are a demuxer allowed to set or a muxer allowed to
read. This leads to erratic behaviour depending on whether decoding or
encoding is being performed or not (and whether it uses the AVStream
embedded codec context).
- various synchronization issues arising from the fact that the same
context is used by several different APIs (muxers/demuxers,
parsers, bitstream filters and encoders/decoders) simultaneously, with
there being no clear rules for who can modify what and the different
processes being typically delayed with respect to each other.
- avformat_find_stream_info() making it necessary to support opening
and closing a single codec context multiple times, thus
complicating the semantics of freeing various allocated objects in the
codec context.
Those problems are resolved by replacing the AVStream embedded codec
context with a newly added AVCodecParameters instance, which stores only
the stream parameters exported by the demuxers or read by the muxers.
2014-06-18 18:42:52 +00:00
|
|
|
if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO && st->id == -1) {
|
|
|
|
if (st->codecpar->codec_id == AV_CODEC_ID_MP3) {
|
2012-12-10 17:48:18 +00:00
|
|
|
avio_skip(pb, 4);
|
|
|
|
len -= 4;
|
|
|
|
if (len <= 0)
|
|
|
|
goto skip;
|
|
|
|
if ((res = av_get_packet(pb, pkt, len)) < 0)
|
|
|
|
return res;
|
|
|
|
} else { // ADPCM, PCM
|
|
|
|
if (len <= 0)
|
|
|
|
goto skip;
|
|
|
|
if ((res = av_get_packet(pb, pkt, len)) < 0)
|
|
|
|
return res;
|
|
|
|
}
|
|
|
|
pkt->pos = pos;
|
|
|
|
pkt->stream_index = st->index;
|
|
|
|
return pkt->size;
|
2009-03-13 19:37:05 +00:00
|
|
|
}
|
|
|
|
}
|
2008-05-20 23:31:10 +00:00
|
|
|
} else if (tag == TAG_JPEG2) {
|
|
|
|
for (i=0; i<s->nb_streams; i++) {
|
|
|
|
st = s->streams[i];
|
lavf: replace AVStream.codec with AVStream.codecpar
Currently, AVStream contains an embedded AVCodecContext instance, which
is used by demuxers to export stream parameters to the caller and by
muxers to receive stream parameters from the caller. It is also used
internally as the codec context that is passed to parsers.
In addition, it is also widely used by the callers as the decoding (when
demuxer) or encoding (when muxing) context, though this has been
officially discouraged since Libav 11.
There are multiple important problems with this approach:
- the fields in AVCodecContext are in general one of
* stream parameters
* codec options
* codec state
However, it's not clear which ones are which. It is consequently
unclear which fields are a demuxer allowed to set or a muxer allowed to
read. This leads to erratic behaviour depending on whether decoding or
encoding is being performed or not (and whether it uses the AVStream
embedded codec context).
- various synchronization issues arising from the fact that the same
context is used by several different APIs (muxers/demuxers,
parsers, bitstream filters and encoders/decoders) simultaneously, with
there being no clear rules for who can modify what and the different
processes being typically delayed with respect to each other.
- avformat_find_stream_info() making it necessary to support opening
and closing a single codec context multiple times, thus
complicating the semantics of freeing various allocated objects in the
codec context.
Those problems are resolved by replacing the AVStream embedded codec
context with a newly added AVCodecParameters instance, which stores only
the stream parameters exported by the demuxers or read by the muxers.
2014-06-18 18:42:52 +00:00
|
|
|
if (st->codecpar->codec_id == AV_CODEC_ID_MJPEG && st->id == -2)
|
2008-05-20 23:31:10 +00:00
|
|
|
break;
|
|
|
|
}
|
|
|
|
if (i == s->nb_streams) {
|
2011-06-18 09:43:24 +00:00
|
|
|
vst = avformat_new_stream(s, NULL);
|
2008-05-20 23:31:10 +00:00
|
|
|
if (!vst)
|
2012-10-11 21:59:54 +00:00
|
|
|
return AVERROR(ENOMEM);
|
2011-06-18 09:43:24 +00:00
|
|
|
vst->id = -2; /* -2 to avoid clash with video stream and audio stream */
|
lavf: replace AVStream.codec with AVStream.codecpar
Currently, AVStream contains an embedded AVCodecContext instance, which
is used by demuxers to export stream parameters to the caller and by
muxers to receive stream parameters from the caller. It is also used
internally as the codec context that is passed to parsers.
In addition, it is also widely used by the callers as the decoding (when
demuxer) or encoding (when muxing) context, though this has been
officially discouraged since Libav 11.
There are multiple important problems with this approach:
- the fields in AVCodecContext are in general one of
* stream parameters
* codec options
* codec state
However, it's not clear which ones are which. It is consequently
unclear which fields are a demuxer allowed to set or a muxer allowed to
read. This leads to erratic behaviour depending on whether decoding or
encoding is being performed or not (and whether it uses the AVStream
embedded codec context).
- various synchronization issues arising from the fact that the same
context is used by several different APIs (muxers/demuxers,
parsers, bitstream filters and encoders/decoders) simultaneously, with
there being no clear rules for who can modify what and the different
processes being typically delayed with respect to each other.
- avformat_find_stream_info() making it necessary to support opening
and closing a single codec context multiple times, thus
complicating the semantics of freeing various allocated objects in the
codec context.
Those problems are resolved by replacing the AVStream embedded codec
context with a newly added AVCodecParameters instance, which stores only
the stream parameters exported by the demuxers or read by the muxers.
2014-06-18 18:42:52 +00:00
|
|
|
vst->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
|
|
|
|
vst->codecpar->codec_id = AV_CODEC_ID_MJPEG;
|
2011-11-29 18:28:15 +00:00
|
|
|
avpriv_set_pts_info(vst, 64, 256, swf->frame_rate);
|
2008-05-20 23:31:10 +00:00
|
|
|
st = vst;
|
|
|
|
}
|
2011-02-21 15:43:01 +00:00
|
|
|
avio_rl16(pb); /* BITMAP_ID */
|
2012-12-10 17:44:09 +00:00
|
|
|
len -= 2;
|
|
|
|
if (len < 4)
|
|
|
|
goto skip;
|
|
|
|
if ((res = av_new_packet(pkt, len)) < 0)
|
2012-02-23 19:53:27 +00:00
|
|
|
return res;
|
2013-12-19 00:48:15 +00:00
|
|
|
if (avio_read(pb, pkt->data, 4) != 4) {
|
|
|
|
return AVERROR_INVALIDDATA;
|
|
|
|
}
|
2008-05-20 23:31:10 +00:00
|
|
|
if (AV_RB32(pkt->data) == 0xffd8ffd9 ||
|
|
|
|
AV_RB32(pkt->data) == 0xffd9ffd8) {
|
|
|
|
/* old SWF files containing SOI/EOI as data start */
|
|
|
|
/* files created by swink have reversed tag */
|
|
|
|
pkt->size -= 4;
|
2013-12-19 03:38:16 +00:00
|
|
|
memset(pkt->data+pkt->size, 0, 4);
|
2013-12-19 02:50:05 +00:00
|
|
|
res = avio_read(pb, pkt->data, pkt->size);
|
2008-05-20 23:31:10 +00:00
|
|
|
} else {
|
2013-12-19 02:50:05 +00:00
|
|
|
res = avio_read(pb, pkt->data + 4, pkt->size - 4);
|
|
|
|
if (res >= 0)
|
|
|
|
res += 4;
|
2008-05-20 23:31:10 +00:00
|
|
|
}
|
2013-12-19 02:50:05 +00:00
|
|
|
if (res != pkt->size) {
|
|
|
|
if (res < 0) {
|
|
|
|
return res;
|
|
|
|
}
|
|
|
|
av_shrink_packet(pkt, res);
|
|
|
|
}
|
|
|
|
|
2009-03-13 22:26:45 +00:00
|
|
|
pkt->pos = pos;
|
2008-05-20 23:31:10 +00:00
|
|
|
pkt->stream_index = st->index;
|
|
|
|
return pkt->size;
|
2012-12-04 14:52:37 +00:00
|
|
|
} else {
|
|
|
|
av_log(s, AV_LOG_DEBUG, "Unknown tag: %d\n", tag);
|
2008-05-20 23:31:10 +00:00
|
|
|
}
|
2009-03-13 19:37:05 +00:00
|
|
|
skip:
|
2012-12-12 09:01:43 +00:00
|
|
|
if(len<0)
|
2016-10-09 10:57:01 +00:00
|
|
|
av_log(s, AV_LOG_WARNING, "Clipping len %d\n", len);
|
2012-12-10 17:44:09 +00:00
|
|
|
len = FFMAX(0, len);
|
2011-03-15 08:14:38 +00:00
|
|
|
avio_skip(pb, len);
|
2008-05-20 23:31:10 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2012-04-02 23:33:03 +00:00
|
|
|
#if CONFIG_ZLIB
|
|
|
|
static av_cold int swf_read_close(AVFormatContext *avctx)
|
|
|
|
{
|
2020-09-20 11:21:28 +00:00
|
|
|
SWFDecContext *s = avctx->priv_data;
|
2012-04-02 23:33:03 +00:00
|
|
|
inflateEnd(&s->zstream);
|
|
|
|
av_freep(&s->zbuf_in);
|
|
|
|
av_freep(&s->zbuf_out);
|
2017-09-01 05:16:33 +00:00
|
|
|
avio_context_free(&s->zpb);
|
2012-04-02 23:33:03 +00:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
|
2021-04-19 17:45:24 +00:00
|
|
|
const AVInputFormat ff_swf_demuxer = {
|
2011-07-16 20:18:12 +00:00
|
|
|
.name = "swf",
|
2012-07-24 01:23:48 +00:00
|
|
|
.long_name = NULL_IF_CONFIG_SMALL("SWF (ShockWave Flash)"),
|
2020-09-20 11:21:28 +00:00
|
|
|
.priv_data_size = sizeof(SWFDecContext),
|
2011-07-16 20:18:12 +00:00
|
|
|
.read_probe = swf_probe,
|
|
|
|
.read_header = swf_read_header,
|
|
|
|
.read_packet = swf_read_packet,
|
2012-04-02 23:33:03 +00:00
|
|
|
#if CONFIG_ZLIB
|
|
|
|
.read_close = swf_read_close,
|
|
|
|
#endif
|
2008-05-20 23:31:10 +00:00
|
|
|
};
|