mirror of https://github.com/FFmpeg/FFmpeg.git
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
352 lines
11 KiB
352 lines
11 KiB
/* |
|
* Smacker demuxer |
|
* Copyright (c) 2006 Konstantin Shishkov |
|
* |
|
* This file is part of Libav. |
|
* |
|
* Libav 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. |
|
* |
|
* Libav 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 Libav; 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 "libavutil/bswap.h" |
|
#include "libavutil/intreadwrite.h" |
|
#include "avformat.h" |
|
|
|
#define SMACKER_PAL 0x01 |
|
#define SMACKER_FLAG_RING_FRAME 0x01 |
|
|
|
enum SAudFlags { |
|
SMK_AUD_PACKED = 0x80000000, |
|
SMK_AUD_16BITS = 0x20000000, |
|
SMK_AUD_STEREO = 0x10000000, |
|
SMK_AUD_BINKAUD = 0x08000000, |
|
SMK_AUD_USEDCT = 0x04000000 |
|
}; |
|
|
|
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; |
|
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(AVProbeData *p) |
|
{ |
|
if(p->buf[0] == 'S' && p->buf[1] == 'M' && p->buf[2] == 'K' |
|
&& (p->buf[3] == '2' || p->buf[3] == '4')) |
|
return AVPROBE_SCORE_MAX; |
|
else |
|
return 0; |
|
} |
|
|
|
static int smacker_read_header(AVFormatContext *s, AVFormatParameters *ap) |
|
{ |
|
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 -1; |
|
smk->width = avio_rl32(pb); |
|
smk->height = avio_rl32(pb); |
|
smk->frames = avio_rl32(pb); |
|
smk->pts_inc = (int32_t)avio_rl32(pb); |
|
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 -1; |
|
} |
|
|
|
//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_rl32(pb); |
|
smk->pad = avio_rl32(pb); |
|
/* setup data */ |
|
if(smk->frames > 0xFFFFFF) { |
|
av_log(s, AV_LOG_ERROR, "Too many frames: %i\n", smk->frames); |
|
return -1; |
|
} |
|
smk->frm_size = av_malloc(smk->frames * 4); |
|
smk->frm_flags = av_malloc(smk->frames); |
|
|
|
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 = av_new_stream(s, 0); |
|
if (!st) |
|
return -1; |
|
smk->videoindex = st->index; |
|
st->codec->width = smk->width; |
|
st->codec->height = smk->height; |
|
st->codec->pix_fmt = PIX_FMT_PAL8; |
|
st->codec->codec_type = AVMEDIA_TYPE_VIDEO; |
|
st->codec->codec_id = CODEC_ID_SMACKVIDEO; |
|
st->codec->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); |
|
av_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] & 0xFFFFFF){ |
|
ast[i] = av_new_stream(s, 0); |
|
smk->indexes[i] = ast[i]->index; |
|
ast[i]->codec->codec_type = AVMEDIA_TYPE_AUDIO; |
|
if (smk->rates[i] & SMK_AUD_BINKAUD) { |
|
ast[i]->codec->codec_id = CODEC_ID_BINKAUDIO_RDFT; |
|
} else if (smk->rates[i] & SMK_AUD_USEDCT) { |
|
ast[i]->codec->codec_id = CODEC_ID_BINKAUDIO_DCT; |
|
} else if (smk->rates[i] & SMK_AUD_PACKED){ |
|
ast[i]->codec->codec_id = CODEC_ID_SMACKAUDIO; |
|
ast[i]->codec->codec_tag = MKTAG('S', 'M', 'K', 'A'); |
|
} else { |
|
ast[i]->codec->codec_id = CODEC_ID_PCM_U8; |
|
} |
|
ast[i]->codec->channels = (smk->rates[i] & SMK_AUD_STEREO) ? 2 : 1; |
|
ast[i]->codec->sample_rate = smk->rates[i] & 0xFFFFFF; |
|
ast[i]->codec->bits_per_coded_sample = (smk->rates[i] & SMK_AUD_16BITS) ? 16 : 8; |
|
if(ast[i]->codec->bits_per_coded_sample == 16 && ast[i]->codec->codec_id == CODEC_ID_PCM_U8) |
|
ast[i]->codec->codec_id = CODEC_ID_PCM_S16LE; |
|
av_set_pts_info(ast[i], 64, 1, ast[i]->codec->sample_rate |
|
* ast[i]->codec->channels * ast[i]->codec->bits_per_coded_sample / 8); |
|
} |
|
} |
|
|
|
|
|
/* load trees to extradata, they will be unpacked by decoder */ |
|
st->codec->extradata = av_malloc(smk->treesize + 16); |
|
st->codec->extradata_size = smk->treesize + 16; |
|
if(!st->codec->extradata){ |
|
av_log(s, AV_LOG_ERROR, "Cannot allocate %i bytes of extradata\n", smk->treesize + 16); |
|
av_free(smk->frm_size); |
|
av_free(smk->frm_flags); |
|
return -1; |
|
} |
|
ret = avio_read(pb, st->codec->extradata + 16, st->codec->extradata_size - 16); |
|
if(ret != st->codec->extradata_size - 16){ |
|
av_free(smk->frm_size); |
|
av_free(smk->frm_flags); |
|
return AVERROR(EIO); |
|
} |
|
((int32_t*)st->codec->extradata)[0] = av_le2ne32(smk->mmap_size); |
|
((int32_t*)st->codec->extradata)[1] = av_le2ne32(smk->mclr_size); |
|
((int32_t*)st->codec->extradata)[2] = av_le2ne32(smk->full_size); |
|
((int32_t*)st->codec->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; |
|
int pos; |
|
|
|
if (s->pb->eof_reached || 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 */ |
|
pos = avio_tell(s->pb); |
|
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; |
|
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) * 3; |
|
j = (t & 0x3F) + 1; |
|
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) { |
|
int size; |
|
size = avio_rl32(s->pb) - 4; |
|
frame_size -= size; |
|
frame_size -= 4; |
|
smk->curstream++; |
|
smk->bufs[smk->curstream] = av_realloc(smk->bufs[smk->curstream], size); |
|
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 (av_new_packet(pkt, frame_size + 768)) |
|
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->size = ret + 769; |
|
smk->cur_frame++; |
|
smk->nextpos = avio_tell(s->pb); |
|
} else { |
|
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_free(smk->bufs[i]); |
|
av_free(smk->frm_size); |
|
av_free(smk->frm_flags); |
|
|
|
return 0; |
|
} |
|
|
|
AVInputFormat ff_smacker_demuxer = { |
|
"smk", |
|
NULL_IF_CONFIG_SMALL("Smacker video"), |
|
sizeof(SmackerContext), |
|
smacker_probe, |
|
smacker_read_header, |
|
smacker_read_packet, |
|
smacker_read_close, |
|
};
|
|
|