mirror of
https://git.videolan.org/git/ffmpeg.git
synced 2024-08-28 20:26:14 +02:00
402 lines
14 KiB
C
402 lines
14 KiB
C
/*
|
|
* Smacker demuxer
|
|
* Copyright (c) 2006 Konstantin Shishkov
|
|
*
|
|
* 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
|
|
*/
|
|
|
|
/*
|
|
* Based on http://wiki.multimedia.cx/index.php?title=Smacker
|
|
*/
|
|
|
|
#include <inttypes.h>
|
|
|
|
#include "libavutil/bswap.h"
|
|
#include "libavutil/channel_layout.h"
|
|
#include "libavutil/intreadwrite.h"
|
|
#include "avformat.h"
|
|
#include "internal.h"
|
|
|
|
#define SMACKER_PAL 0x01
|
|
#define SMACKER_FLAG_RING_FRAME 0x01
|
|
|
|
enum SAudFlags {
|
|
SMK_AUD_PACKED = 0x80,
|
|
SMK_AUD_16BITS = 0x20,
|
|
SMK_AUD_STEREO = 0x10,
|
|
SMK_AUD_BINKAUD = 0x08,
|
|
SMK_AUD_USEDCT = 0x04
|
|
};
|
|
|
|
typedef struct SmackerContext {
|
|
/* Smacker file header */
|
|
uint32_t magic;
|
|
uint32_t width, height;
|
|
uint32_t frames;
|
|
int pts_inc;
|
|
uint32_t flags;
|
|
uint32_t audio[7];
|
|
uint32_t treesize;
|
|
uint32_t mmap_size, mclr_size, full_size, type_size;
|
|
uint8_t aflags[7];
|
|
uint32_t rates[7];
|
|
uint32_t pad;
|
|
/* frame info */
|
|
uint32_t *frm_size;
|
|
uint8_t *frm_flags;
|
|
/* internal variables */
|
|
int cur_frame;
|
|
int is_ver4;
|
|
int64_t cur_pts;
|
|
/* current frame for demuxing */
|
|
uint8_t pal[768];
|
|
int indexes[7];
|
|
int videoindex;
|
|
uint8_t *bufs[7];
|
|
int buf_sizes[7];
|
|
int stream_id[7];
|
|
int curstream;
|
|
int64_t nextpos;
|
|
int64_t aud_pts[7];
|
|
} SmackerContext;
|
|
|
|
typedef struct SmackerFrame {
|
|
int64_t pts;
|
|
int stream;
|
|
} SmackerFrame;
|
|
|
|
/* palette used in Smacker */
|
|
static const uint8_t smk_pal[64] = {
|
|
0x00, 0x04, 0x08, 0x0C, 0x10, 0x14, 0x18, 0x1C,
|
|
0x20, 0x24, 0x28, 0x2C, 0x30, 0x34, 0x38, 0x3C,
|
|
0x41, 0x45, 0x49, 0x4D, 0x51, 0x55, 0x59, 0x5D,
|
|
0x61, 0x65, 0x69, 0x6D, 0x71, 0x75, 0x79, 0x7D,
|
|
0x82, 0x86, 0x8A, 0x8E, 0x92, 0x96, 0x9A, 0x9E,
|
|
0xA2, 0xA6, 0xAA, 0xAE, 0xB2, 0xB6, 0xBA, 0xBE,
|
|
0xC3, 0xC7, 0xCB, 0xCF, 0xD3, 0xD7, 0xDB, 0xDF,
|
|
0xE3, 0xE7, 0xEB, 0xEF, 0xF3, 0xF7, 0xFB, 0xFF
|
|
};
|
|
|
|
|
|
static int smacker_probe(const AVProbeData *p)
|
|
{
|
|
if ( AV_RL32(p->buf) != MKTAG('S', 'M', 'K', '2')
|
|
&& AV_RL32(p->buf) != MKTAG('S', 'M', 'K', '4'))
|
|
return 0;
|
|
|
|
if (AV_RL32(p->buf+4) > 32768U || AV_RL32(p->buf+8) > 32768U)
|
|
return AVPROBE_SCORE_MAX/4;
|
|
|
|
return AVPROBE_SCORE_MAX;
|
|
}
|
|
|
|
static int smacker_read_header(AVFormatContext *s)
|
|
{
|
|
AVIOContext *pb = s->pb;
|
|
SmackerContext *smk = s->priv_data;
|
|
AVStream *st, *ast[7];
|
|
int i, ret;
|
|
int tbase;
|
|
|
|
/* read and check header */
|
|
smk->magic = avio_rl32(pb);
|
|
if (smk->magic != MKTAG('S', 'M', 'K', '2') && smk->magic != MKTAG('S', 'M', 'K', '4'))
|
|
return AVERROR_INVALIDDATA;
|
|
smk->width = avio_rl32(pb);
|
|
smk->height = avio_rl32(pb);
|
|
smk->frames = avio_rl32(pb);
|
|
smk->pts_inc = (int32_t)avio_rl32(pb);
|
|
if (smk->pts_inc > INT_MAX / 100) {
|
|
av_log(s, AV_LOG_ERROR, "pts_inc %d is too large\n", smk->pts_inc);
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
|
|
smk->flags = avio_rl32(pb);
|
|
if(smk->flags & SMACKER_FLAG_RING_FRAME)
|
|
smk->frames++;
|
|
for(i = 0; i < 7; i++)
|
|
smk->audio[i] = avio_rl32(pb);
|
|
smk->treesize = avio_rl32(pb);
|
|
|
|
if(smk->treesize >= UINT_MAX/4){ // smk->treesize + 16 must not overflow (this check is probably redundant)
|
|
av_log(s, AV_LOG_ERROR, "treesize too large\n");
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
|
|
//FIXME remove extradata "rebuilding"
|
|
smk->mmap_size = avio_rl32(pb);
|
|
smk->mclr_size = avio_rl32(pb);
|
|
smk->full_size = avio_rl32(pb);
|
|
smk->type_size = avio_rl32(pb);
|
|
for(i = 0; i < 7; i++) {
|
|
smk->rates[i] = avio_rl24(pb);
|
|
smk->aflags[i] = avio_r8(pb);
|
|
}
|
|
smk->pad = avio_rl32(pb);
|
|
/* setup data */
|
|
if(smk->frames > 0xFFFFFF) {
|
|
av_log(s, AV_LOG_ERROR, "Too many frames: %"PRIu32"\n", smk->frames);
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
smk->frm_size = av_malloc_array(smk->frames, sizeof(*smk->frm_size));
|
|
smk->frm_flags = av_malloc(smk->frames);
|
|
if (!smk->frm_size || !smk->frm_flags) {
|
|
av_freep(&smk->frm_size);
|
|
av_freep(&smk->frm_flags);
|
|
return AVERROR(ENOMEM);
|
|
}
|
|
|
|
smk->is_ver4 = (smk->magic != MKTAG('S', 'M', 'K', '2'));
|
|
|
|
/* read frame info */
|
|
for(i = 0; i < smk->frames; i++) {
|
|
smk->frm_size[i] = avio_rl32(pb);
|
|
}
|
|
for(i = 0; i < smk->frames; i++) {
|
|
smk->frm_flags[i] = avio_r8(pb);
|
|
}
|
|
|
|
/* init video codec */
|
|
st = avformat_new_stream(s, NULL);
|
|
if (!st)
|
|
return AVERROR(ENOMEM);
|
|
smk->videoindex = st->index;
|
|
st->codecpar->width = smk->width;
|
|
st->codecpar->height = smk->height;
|
|
st->codecpar->format = AV_PIX_FMT_PAL8;
|
|
st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
|
|
st->codecpar->codec_id = AV_CODEC_ID_SMACKVIDEO;
|
|
st->codecpar->codec_tag = smk->magic;
|
|
/* Smacker uses 100000 as internal timebase */
|
|
if(smk->pts_inc < 0)
|
|
smk->pts_inc = -smk->pts_inc;
|
|
else
|
|
smk->pts_inc *= 100;
|
|
tbase = 100000;
|
|
av_reduce(&tbase, &smk->pts_inc, tbase, smk->pts_inc, (1UL<<31)-1);
|
|
avpriv_set_pts_info(st, 33, smk->pts_inc, tbase);
|
|
st->duration = smk->frames;
|
|
/* handle possible audio streams */
|
|
for(i = 0; i < 7; i++) {
|
|
smk->indexes[i] = -1;
|
|
if (smk->rates[i]) {
|
|
ast[i] = avformat_new_stream(s, NULL);
|
|
if (!ast[i])
|
|
return AVERROR(ENOMEM);
|
|
smk->indexes[i] = ast[i]->index;
|
|
ast[i]->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
|
|
if (smk->aflags[i] & SMK_AUD_BINKAUD) {
|
|
ast[i]->codecpar->codec_id = AV_CODEC_ID_BINKAUDIO_RDFT;
|
|
} else if (smk->aflags[i] & SMK_AUD_USEDCT) {
|
|
ast[i]->codecpar->codec_id = AV_CODEC_ID_BINKAUDIO_DCT;
|
|
} else if (smk->aflags[i] & SMK_AUD_PACKED){
|
|
ast[i]->codecpar->codec_id = AV_CODEC_ID_SMACKAUDIO;
|
|
ast[i]->codecpar->codec_tag = MKTAG('S', 'M', 'K', 'A');
|
|
} else {
|
|
ast[i]->codecpar->codec_id = AV_CODEC_ID_PCM_U8;
|
|
}
|
|
if (smk->aflags[i] & SMK_AUD_STEREO) {
|
|
ast[i]->codecpar->channels = 2;
|
|
ast[i]->codecpar->channel_layout = AV_CH_LAYOUT_STEREO;
|
|
} else {
|
|
ast[i]->codecpar->channels = 1;
|
|
ast[i]->codecpar->channel_layout = AV_CH_LAYOUT_MONO;
|
|
}
|
|
ast[i]->codecpar->sample_rate = smk->rates[i];
|
|
ast[i]->codecpar->bits_per_coded_sample = (smk->aflags[i] & SMK_AUD_16BITS) ? 16 : 8;
|
|
if(ast[i]->codecpar->bits_per_coded_sample == 16 && ast[i]->codecpar->codec_id == AV_CODEC_ID_PCM_U8)
|
|
ast[i]->codecpar->codec_id = AV_CODEC_ID_PCM_S16LE;
|
|
avpriv_set_pts_info(ast[i], 64, 1, ast[i]->codecpar->sample_rate
|
|
* ast[i]->codecpar->channels * ast[i]->codecpar->bits_per_coded_sample / 8);
|
|
}
|
|
}
|
|
|
|
|
|
/* load trees to extradata, they will be unpacked by decoder */
|
|
if(ff_alloc_extradata(st->codecpar, smk->treesize + 16)){
|
|
av_log(s, AV_LOG_ERROR,
|
|
"Cannot allocate %"PRIu32" bytes of extradata\n",
|
|
smk->treesize + 16);
|
|
av_freep(&smk->frm_size);
|
|
av_freep(&smk->frm_flags);
|
|
return AVERROR(ENOMEM);
|
|
}
|
|
ret = avio_read(pb, st->codecpar->extradata + 16, st->codecpar->extradata_size - 16);
|
|
if(ret != st->codecpar->extradata_size - 16){
|
|
av_freep(&smk->frm_size);
|
|
av_freep(&smk->frm_flags);
|
|
return AVERROR(EIO);
|
|
}
|
|
((int32_t*)st->codecpar->extradata)[0] = av_le2ne32(smk->mmap_size);
|
|
((int32_t*)st->codecpar->extradata)[1] = av_le2ne32(smk->mclr_size);
|
|
((int32_t*)st->codecpar->extradata)[2] = av_le2ne32(smk->full_size);
|
|
((int32_t*)st->codecpar->extradata)[3] = av_le2ne32(smk->type_size);
|
|
|
|
smk->curstream = -1;
|
|
smk->nextpos = avio_tell(pb);
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
static int smacker_read_packet(AVFormatContext *s, AVPacket *pkt)
|
|
{
|
|
SmackerContext *smk = s->priv_data;
|
|
int flags;
|
|
int ret;
|
|
int i;
|
|
int frame_size = 0;
|
|
int palchange = 0;
|
|
|
|
if (avio_feof(s->pb) || smk->cur_frame >= smk->frames)
|
|
return AVERROR_EOF;
|
|
|
|
/* if we demuxed all streams, pass another frame */
|
|
if(smk->curstream < 0) {
|
|
avio_seek(s->pb, smk->nextpos, 0);
|
|
frame_size = smk->frm_size[smk->cur_frame] & (~3);
|
|
flags = smk->frm_flags[smk->cur_frame];
|
|
/* handle palette change event */
|
|
if(flags & SMACKER_PAL){
|
|
int size, sz, t, off, j, pos;
|
|
uint8_t *pal = smk->pal;
|
|
uint8_t oldpal[768];
|
|
|
|
memcpy(oldpal, pal, 768);
|
|
size = avio_r8(s->pb);
|
|
size = size * 4 - 1;
|
|
if(size + 1 > frame_size)
|
|
return AVERROR_INVALIDDATA;
|
|
frame_size -= size;
|
|
frame_size--;
|
|
sz = 0;
|
|
pos = avio_tell(s->pb) + size;
|
|
while(sz < 256){
|
|
t = avio_r8(s->pb);
|
|
if(t & 0x80){ /* skip palette entries */
|
|
sz += (t & 0x7F) + 1;
|
|
pal += ((t & 0x7F) + 1) * 3;
|
|
} else if(t & 0x40){ /* copy with offset */
|
|
off = avio_r8(s->pb);
|
|
j = (t & 0x3F) + 1;
|
|
if (off + j > 0x100) {
|
|
av_log(s, AV_LOG_ERROR,
|
|
"Invalid palette update, offset=%d length=%d extends beyond palette size\n",
|
|
off, j);
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
off *= 3;
|
|
while(j-- && sz < 256) {
|
|
*pal++ = oldpal[off + 0];
|
|
*pal++ = oldpal[off + 1];
|
|
*pal++ = oldpal[off + 2];
|
|
sz++;
|
|
off += 3;
|
|
}
|
|
} else { /* new entries */
|
|
*pal++ = smk_pal[t];
|
|
*pal++ = smk_pal[avio_r8(s->pb) & 0x3F];
|
|
*pal++ = smk_pal[avio_r8(s->pb) & 0x3F];
|
|
sz++;
|
|
}
|
|
}
|
|
avio_seek(s->pb, pos, 0);
|
|
palchange |= 1;
|
|
}
|
|
flags >>= 1;
|
|
smk->curstream = -1;
|
|
/* if audio chunks are present, put them to stack and retrieve later */
|
|
for(i = 0; i < 7; i++) {
|
|
if(flags & 1) {
|
|
uint32_t size;
|
|
int err;
|
|
|
|
size = avio_rl32(s->pb) - 4;
|
|
if (!size || size + 4LL > frame_size) {
|
|
av_log(s, AV_LOG_ERROR, "Invalid audio part size\n");
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
frame_size -= size;
|
|
frame_size -= 4;
|
|
smk->curstream++;
|
|
if ((err = av_reallocp(&smk->bufs[smk->curstream], size)) < 0) {
|
|
smk->buf_sizes[smk->curstream] = 0;
|
|
return err;
|
|
}
|
|
smk->buf_sizes[smk->curstream] = size;
|
|
ret = avio_read(s->pb, smk->bufs[smk->curstream], size);
|
|
if(ret != size)
|
|
return AVERROR(EIO);
|
|
smk->stream_id[smk->curstream] = smk->indexes[i];
|
|
}
|
|
flags >>= 1;
|
|
}
|
|
if (frame_size < 0 || frame_size >= INT_MAX/2)
|
|
return AVERROR_INVALIDDATA;
|
|
if (av_new_packet(pkt, frame_size + 769))
|
|
return AVERROR(ENOMEM);
|
|
if(smk->frm_size[smk->cur_frame] & 1)
|
|
palchange |= 2;
|
|
pkt->data[0] = palchange;
|
|
memcpy(pkt->data + 1, smk->pal, 768);
|
|
ret = avio_read(s->pb, pkt->data + 769, frame_size);
|
|
if(ret != frame_size)
|
|
return AVERROR(EIO);
|
|
pkt->stream_index = smk->videoindex;
|
|
pkt->pts = smk->cur_frame;
|
|
pkt->size = ret + 769;
|
|
smk->cur_frame++;
|
|
smk->nextpos = avio_tell(s->pb);
|
|
} else {
|
|
if (smk->stream_id[smk->curstream] < 0 || !smk->bufs[smk->curstream])
|
|
return AVERROR_INVALIDDATA;
|
|
if (av_new_packet(pkt, smk->buf_sizes[smk->curstream]))
|
|
return AVERROR(ENOMEM);
|
|
memcpy(pkt->data, smk->bufs[smk->curstream], smk->buf_sizes[smk->curstream]);
|
|
pkt->size = smk->buf_sizes[smk->curstream];
|
|
pkt->stream_index = smk->stream_id[smk->curstream];
|
|
pkt->pts = smk->aud_pts[smk->curstream];
|
|
smk->aud_pts[smk->curstream] += AV_RL32(pkt->data);
|
|
smk->curstream--;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int smacker_read_close(AVFormatContext *s)
|
|
{
|
|
SmackerContext *smk = s->priv_data;
|
|
int i;
|
|
|
|
for(i = 0; i < 7; i++)
|
|
av_freep(&smk->bufs[i]);
|
|
av_freep(&smk->frm_size);
|
|
av_freep(&smk->frm_flags);
|
|
|
|
return 0;
|
|
}
|
|
|
|
AVInputFormat ff_smacker_demuxer = {
|
|
.name = "smk",
|
|
.long_name = NULL_IF_CONFIG_SMALL("Smacker"),
|
|
.priv_data_size = sizeof(SmackerContext),
|
|
.read_probe = smacker_probe,
|
|
.read_header = smacker_read_header,
|
|
.read_packet = smacker_read_packet,
|
|
.read_close = smacker_read_close,
|
|
};
|