yading@11: /* yading@11: * Smacker demuxer yading@11: * Copyright (c) 2006 Konstantin Shishkov yading@11: * yading@11: * This file is part of FFmpeg. yading@11: * yading@11: * FFmpeg is free software; you can redistribute it and/or yading@11: * modify it under the terms of the GNU Lesser General Public yading@11: * License as published by the Free Software Foundation; either yading@11: * version 2.1 of the License, or (at your option) any later version. yading@11: * yading@11: * FFmpeg is distributed in the hope that it will be useful, yading@11: * but WITHOUT ANY WARRANTY; without even the implied warranty of yading@11: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU yading@11: * Lesser General Public License for more details. yading@11: * yading@11: * You should have received a copy of the GNU Lesser General Public yading@11: * License along with FFmpeg; if not, write to the Free Software yading@11: * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA yading@11: */ yading@11: yading@11: /* yading@11: * Based on http://wiki.multimedia.cx/index.php?title=Smacker yading@11: */ yading@11: yading@11: #include "libavutil/bswap.h" yading@11: #include "libavutil/channel_layout.h" yading@11: #include "libavutil/intreadwrite.h" yading@11: #include "avformat.h" yading@11: #include "internal.h" yading@11: yading@11: #define SMACKER_PAL 0x01 yading@11: #define SMACKER_FLAG_RING_FRAME 0x01 yading@11: yading@11: enum SAudFlags { yading@11: SMK_AUD_PACKED = 0x80, yading@11: SMK_AUD_16BITS = 0x20, yading@11: SMK_AUD_STEREO = 0x10, yading@11: SMK_AUD_BINKAUD = 0x08, yading@11: SMK_AUD_USEDCT = 0x04 yading@11: }; yading@11: yading@11: typedef struct SmackerContext { yading@11: /* Smacker file header */ yading@11: uint32_t magic; yading@11: uint32_t width, height; yading@11: uint32_t frames; yading@11: int pts_inc; yading@11: uint32_t flags; yading@11: uint32_t audio[7]; yading@11: uint32_t treesize; yading@11: uint32_t mmap_size, mclr_size, full_size, type_size; yading@11: uint8_t aflags[7]; yading@11: uint32_t rates[7]; yading@11: uint32_t pad; yading@11: /* frame info */ yading@11: uint32_t *frm_size; yading@11: uint8_t *frm_flags; yading@11: /* internal variables */ yading@11: int cur_frame; yading@11: int is_ver4; yading@11: int64_t cur_pts; yading@11: /* current frame for demuxing */ yading@11: uint8_t pal[768]; yading@11: int indexes[7]; yading@11: int videoindex; yading@11: uint8_t *bufs[7]; yading@11: int buf_sizes[7]; yading@11: int stream_id[7]; yading@11: int curstream; yading@11: int64_t nextpos; yading@11: int64_t aud_pts[7]; yading@11: } SmackerContext; yading@11: yading@11: typedef struct SmackerFrame { yading@11: int64_t pts; yading@11: int stream; yading@11: } SmackerFrame; yading@11: yading@11: /* palette used in Smacker */ yading@11: static const uint8_t smk_pal[64] = { yading@11: 0x00, 0x04, 0x08, 0x0C, 0x10, 0x14, 0x18, 0x1C, yading@11: 0x20, 0x24, 0x28, 0x2C, 0x30, 0x34, 0x38, 0x3C, yading@11: 0x41, 0x45, 0x49, 0x4D, 0x51, 0x55, 0x59, 0x5D, yading@11: 0x61, 0x65, 0x69, 0x6D, 0x71, 0x75, 0x79, 0x7D, yading@11: 0x82, 0x86, 0x8A, 0x8E, 0x92, 0x96, 0x9A, 0x9E, yading@11: 0xA2, 0xA6, 0xAA, 0xAE, 0xB2, 0xB6, 0xBA, 0xBE, yading@11: 0xC3, 0xC7, 0xCB, 0xCF, 0xD3, 0xD7, 0xDB, 0xDF, yading@11: 0xE3, 0xE7, 0xEB, 0xEF, 0xF3, 0xF7, 0xFB, 0xFF yading@11: }; yading@11: yading@11: yading@11: static int smacker_probe(AVProbeData *p) yading@11: { yading@11: if(p->buf[0] == 'S' && p->buf[1] == 'M' && p->buf[2] == 'K' yading@11: && (p->buf[3] == '2' || p->buf[3] == '4')) yading@11: return AVPROBE_SCORE_MAX; yading@11: else yading@11: return 0; yading@11: } yading@11: yading@11: static int smacker_read_header(AVFormatContext *s) yading@11: { yading@11: AVIOContext *pb = s->pb; yading@11: SmackerContext *smk = s->priv_data; yading@11: AVStream *st, *ast[7]; yading@11: int i, ret; yading@11: int tbase; yading@11: yading@11: /* read and check header */ yading@11: smk->magic = avio_rl32(pb); yading@11: if (smk->magic != MKTAG('S', 'M', 'K', '2') && smk->magic != MKTAG('S', 'M', 'K', '4')) yading@11: return AVERROR_INVALIDDATA; yading@11: smk->width = avio_rl32(pb); yading@11: smk->height = avio_rl32(pb); yading@11: smk->frames = avio_rl32(pb); yading@11: smk->pts_inc = (int32_t)avio_rl32(pb); yading@11: smk->flags = avio_rl32(pb); yading@11: if(smk->flags & SMACKER_FLAG_RING_FRAME) yading@11: smk->frames++; yading@11: for(i = 0; i < 7; i++) yading@11: smk->audio[i] = avio_rl32(pb); yading@11: smk->treesize = avio_rl32(pb); yading@11: yading@11: if(smk->treesize >= UINT_MAX/4){ // smk->treesize + 16 must not overflow (this check is probably redundant) yading@11: av_log(s, AV_LOG_ERROR, "treesize too large\n"); yading@11: return AVERROR_INVALIDDATA; yading@11: } yading@11: yading@11: //FIXME remove extradata "rebuilding" yading@11: smk->mmap_size = avio_rl32(pb); yading@11: smk->mclr_size = avio_rl32(pb); yading@11: smk->full_size = avio_rl32(pb); yading@11: smk->type_size = avio_rl32(pb); yading@11: for(i = 0; i < 7; i++) { yading@11: smk->rates[i] = avio_rl24(pb); yading@11: smk->aflags[i] = avio_r8(pb); yading@11: } yading@11: smk->pad = avio_rl32(pb); yading@11: /* setup data */ yading@11: if(smk->frames > 0xFFFFFF) { yading@11: av_log(s, AV_LOG_ERROR, "Too many frames: %i\n", smk->frames); yading@11: return AVERROR_INVALIDDATA; yading@11: } yading@11: smk->frm_size = av_malloc(smk->frames * 4); yading@11: smk->frm_flags = av_malloc(smk->frames); yading@11: yading@11: smk->is_ver4 = (smk->magic != MKTAG('S', 'M', 'K', '2')); yading@11: yading@11: /* read frame info */ yading@11: for(i = 0; i < smk->frames; i++) { yading@11: smk->frm_size[i] = avio_rl32(pb); yading@11: } yading@11: for(i = 0; i < smk->frames; i++) { yading@11: smk->frm_flags[i] = avio_r8(pb); yading@11: } yading@11: yading@11: /* init video codec */ yading@11: st = avformat_new_stream(s, NULL); yading@11: if (!st) yading@11: return AVERROR(ENOMEM); yading@11: smk->videoindex = st->index; yading@11: st->codec->width = smk->width; yading@11: st->codec->height = smk->height; yading@11: st->codec->pix_fmt = AV_PIX_FMT_PAL8; yading@11: st->codec->codec_type = AVMEDIA_TYPE_VIDEO; yading@11: st->codec->codec_id = AV_CODEC_ID_SMACKVIDEO; yading@11: st->codec->codec_tag = smk->magic; yading@11: /* Smacker uses 100000 as internal timebase */ yading@11: if(smk->pts_inc < 0) yading@11: smk->pts_inc = -smk->pts_inc; yading@11: else yading@11: smk->pts_inc *= 100; yading@11: tbase = 100000; yading@11: av_reduce(&tbase, &smk->pts_inc, tbase, smk->pts_inc, (1UL<<31)-1); yading@11: avpriv_set_pts_info(st, 33, smk->pts_inc, tbase); yading@11: st->duration = smk->frames; yading@11: /* handle possible audio streams */ yading@11: for(i = 0; i < 7; i++) { yading@11: smk->indexes[i] = -1; yading@11: if (smk->rates[i]) { yading@11: ast[i] = avformat_new_stream(s, NULL); yading@11: smk->indexes[i] = ast[i]->index; yading@11: ast[i]->codec->codec_type = AVMEDIA_TYPE_AUDIO; yading@11: if (smk->aflags[i] & SMK_AUD_BINKAUD) { yading@11: ast[i]->codec->codec_id = AV_CODEC_ID_BINKAUDIO_RDFT; yading@11: } else if (smk->aflags[i] & SMK_AUD_USEDCT) { yading@11: ast[i]->codec->codec_id = AV_CODEC_ID_BINKAUDIO_DCT; yading@11: } else if (smk->aflags[i] & SMK_AUD_PACKED){ yading@11: ast[i]->codec->codec_id = AV_CODEC_ID_SMACKAUDIO; yading@11: ast[i]->codec->codec_tag = MKTAG('S', 'M', 'K', 'A'); yading@11: } else { yading@11: ast[i]->codec->codec_id = AV_CODEC_ID_PCM_U8; yading@11: } yading@11: if (smk->aflags[i] & SMK_AUD_STEREO) { yading@11: ast[i]->codec->channels = 2; yading@11: ast[i]->codec->channel_layout = AV_CH_LAYOUT_STEREO; yading@11: } else { yading@11: ast[i]->codec->channels = 1; yading@11: ast[i]->codec->channel_layout = AV_CH_LAYOUT_MONO; yading@11: } yading@11: ast[i]->codec->sample_rate = smk->rates[i]; yading@11: ast[i]->codec->bits_per_coded_sample = (smk->aflags[i] & SMK_AUD_16BITS) ? 16 : 8; yading@11: if(ast[i]->codec->bits_per_coded_sample == 16 && ast[i]->codec->codec_id == AV_CODEC_ID_PCM_U8) yading@11: ast[i]->codec->codec_id = AV_CODEC_ID_PCM_S16LE; yading@11: avpriv_set_pts_info(ast[i], 64, 1, ast[i]->codec->sample_rate yading@11: * ast[i]->codec->channels * ast[i]->codec->bits_per_coded_sample / 8); yading@11: } yading@11: } yading@11: yading@11: yading@11: /* load trees to extradata, they will be unpacked by decoder */ yading@11: st->codec->extradata = av_malloc(smk->treesize + 16 + FF_INPUT_BUFFER_PADDING_SIZE); yading@11: st->codec->extradata_size = smk->treesize + 16; yading@11: if(!st->codec->extradata){ yading@11: av_log(s, AV_LOG_ERROR, "Cannot allocate %i bytes of extradata\n", smk->treesize + 16); yading@11: av_free(smk->frm_size); yading@11: av_free(smk->frm_flags); yading@11: return AVERROR(ENOMEM); yading@11: } yading@11: ret = avio_read(pb, st->codec->extradata + 16, st->codec->extradata_size - 16); yading@11: if(ret != st->codec->extradata_size - 16){ yading@11: av_free(smk->frm_size); yading@11: av_free(smk->frm_flags); yading@11: return AVERROR(EIO); yading@11: } yading@11: ((int32_t*)st->codec->extradata)[0] = av_le2ne32(smk->mmap_size); yading@11: ((int32_t*)st->codec->extradata)[1] = av_le2ne32(smk->mclr_size); yading@11: ((int32_t*)st->codec->extradata)[2] = av_le2ne32(smk->full_size); yading@11: ((int32_t*)st->codec->extradata)[3] = av_le2ne32(smk->type_size); yading@11: yading@11: smk->curstream = -1; yading@11: smk->nextpos = avio_tell(pb); yading@11: yading@11: return 0; yading@11: } yading@11: yading@11: yading@11: static int smacker_read_packet(AVFormatContext *s, AVPacket *pkt) yading@11: { yading@11: SmackerContext *smk = s->priv_data; yading@11: int flags; yading@11: int ret; yading@11: int i; yading@11: int frame_size = 0; yading@11: int palchange = 0; yading@11: yading@11: if (url_feof(s->pb) || smk->cur_frame >= smk->frames) yading@11: return AVERROR_EOF; yading@11: yading@11: /* if we demuxed all streams, pass another frame */ yading@11: if(smk->curstream < 0) { yading@11: avio_seek(s->pb, smk->nextpos, 0); yading@11: frame_size = smk->frm_size[smk->cur_frame] & (~3); yading@11: flags = smk->frm_flags[smk->cur_frame]; yading@11: /* handle palette change event */ yading@11: if(flags & SMACKER_PAL){ yading@11: int size, sz, t, off, j, pos; yading@11: uint8_t *pal = smk->pal; yading@11: uint8_t oldpal[768]; yading@11: yading@11: memcpy(oldpal, pal, 768); yading@11: size = avio_r8(s->pb); yading@11: size = size * 4 - 1; yading@11: if(size + 1 > frame_size) yading@11: return AVERROR_INVALIDDATA; yading@11: frame_size -= size; yading@11: frame_size--; yading@11: sz = 0; yading@11: pos = avio_tell(s->pb) + size; yading@11: while(sz < 256){ yading@11: t = avio_r8(s->pb); yading@11: if(t & 0x80){ /* skip palette entries */ yading@11: sz += (t & 0x7F) + 1; yading@11: pal += ((t & 0x7F) + 1) * 3; yading@11: } else if(t & 0x40){ /* copy with offset */ yading@11: off = avio_r8(s->pb); yading@11: j = (t & 0x3F) + 1; yading@11: if (off + j - 1 > 0xff) { yading@11: av_log(s, AV_LOG_ERROR, yading@11: "Invalid palette update, offset=%d length=%d extends beyond palette size\n", yading@11: off, j); yading@11: return AVERROR_INVALIDDATA; yading@11: } yading@11: off *= 3; yading@11: while(j-- && sz < 256) { yading@11: *pal++ = oldpal[off + 0]; yading@11: *pal++ = oldpal[off + 1]; yading@11: *pal++ = oldpal[off + 2]; yading@11: sz++; yading@11: off += 3; yading@11: } yading@11: } else { /* new entries */ yading@11: *pal++ = smk_pal[t]; yading@11: *pal++ = smk_pal[avio_r8(s->pb) & 0x3F]; yading@11: *pal++ = smk_pal[avio_r8(s->pb) & 0x3F]; yading@11: sz++; yading@11: } yading@11: } yading@11: avio_seek(s->pb, pos, 0); yading@11: palchange |= 1; yading@11: } yading@11: flags >>= 1; yading@11: smk->curstream = -1; yading@11: /* if audio chunks are present, put them to stack and retrieve later */ yading@11: for(i = 0; i < 7; i++) { yading@11: if(flags & 1) { yading@11: unsigned int size; yading@11: uint8_t *tmpbuf; yading@11: yading@11: size = avio_rl32(s->pb) - 4; yading@11: if(size + 4L > frame_size) yading@11: return AVERROR_INVALIDDATA; yading@11: frame_size -= size; yading@11: frame_size -= 4; yading@11: smk->curstream++; yading@11: tmpbuf = av_realloc(smk->bufs[smk->curstream], size); yading@11: if (!tmpbuf) yading@11: return AVERROR(ENOMEM); yading@11: smk->bufs[smk->curstream] = tmpbuf; yading@11: smk->buf_sizes[smk->curstream] = size; yading@11: ret = avio_read(s->pb, smk->bufs[smk->curstream], size); yading@11: if(ret != size) yading@11: return AVERROR(EIO); yading@11: smk->stream_id[smk->curstream] = smk->indexes[i]; yading@11: } yading@11: flags >>= 1; yading@11: } yading@11: if (frame_size < 0) yading@11: return AVERROR_INVALIDDATA; yading@11: if (av_new_packet(pkt, frame_size + 769)) yading@11: return AVERROR(ENOMEM); yading@11: if(smk->frm_size[smk->cur_frame] & 1) yading@11: palchange |= 2; yading@11: pkt->data[0] = palchange; yading@11: memcpy(pkt->data + 1, smk->pal, 768); yading@11: ret = avio_read(s->pb, pkt->data + 769, frame_size); yading@11: if(ret != frame_size) yading@11: return AVERROR(EIO); yading@11: pkt->stream_index = smk->videoindex; yading@11: pkt->size = ret + 769; yading@11: smk->cur_frame++; yading@11: smk->nextpos = avio_tell(s->pb); yading@11: } else { yading@11: if (av_new_packet(pkt, smk->buf_sizes[smk->curstream])) yading@11: return AVERROR(ENOMEM); yading@11: memcpy(pkt->data, smk->bufs[smk->curstream], smk->buf_sizes[smk->curstream]); yading@11: pkt->size = smk->buf_sizes[smk->curstream]; yading@11: pkt->stream_index = smk->stream_id[smk->curstream]; yading@11: pkt->pts = smk->aud_pts[smk->curstream]; yading@11: smk->aud_pts[smk->curstream] += AV_RL32(pkt->data); yading@11: smk->curstream--; yading@11: } yading@11: yading@11: return 0; yading@11: } yading@11: yading@11: static int smacker_read_close(AVFormatContext *s) yading@11: { yading@11: SmackerContext *smk = s->priv_data; yading@11: int i; yading@11: yading@11: for(i = 0; i < 7; i++) yading@11: av_free(smk->bufs[i]); yading@11: av_free(smk->frm_size); yading@11: av_free(smk->frm_flags); yading@11: yading@11: return 0; yading@11: } yading@11: yading@11: AVInputFormat ff_smacker_demuxer = { yading@11: .name = "smk", yading@11: .long_name = NULL_IF_CONFIG_SMALL("Smacker"), yading@11: .priv_data_size = sizeof(SmackerContext), yading@11: .read_probe = smacker_probe, yading@11: .read_header = smacker_read_header, yading@11: .read_packet = smacker_read_packet, yading@11: .read_close = smacker_read_close, yading@11: };