diff options
Diffstat (limited to 'contrib/ffmpeg/libavformat/smacker.c')
| -rw-r--r-- | contrib/ffmpeg/libavformat/smacker.c | 345 |
1 files changed, 0 insertions, 345 deletions
diff --git a/contrib/ffmpeg/libavformat/smacker.c b/contrib/ffmpeg/libavformat/smacker.c deleted file mode 100644 index 04fde3d03..000000000 --- a/contrib/ffmpeg/libavformat/smacker.c +++ /dev/null @@ -1,345 +0,0 @@ -/* - * 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 "avformat.h" -#include "riff.h" -#include "bswap.h" - -#define SMACKER_PAL 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; - offset_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_size < 4) - return 0; - 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) -{ - ByteIOContext *pb = &s->pb; - SmackerContext *smk = (SmackerContext *)s->priv_data; - AVStream *st, *ast[7]; - int i, ret; - int tbase; - - /* read and check header */ - smk->magic = get_le32(pb); - if (smk->magic != MKTAG('S', 'M', 'K', '2') && smk->magic != MKTAG('S', 'M', 'K', '4')) - return -1; - smk->width = get_le32(pb); - smk->height = get_le32(pb); - smk->frames = get_le32(pb); - smk->pts_inc = (int32_t)get_le32(pb); - smk->flags = get_le32(pb); - for(i = 0; i < 7; i++) - smk->audio[i] = get_le32(pb); - smk->treesize = get_le32(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 = get_le32(pb); - smk->mclr_size = get_le32(pb); - smk->full_size = get_le32(pb); - smk->type_size = get_le32(pb); - for(i = 0; i < 7; i++) - smk->rates[i] = get_le32(pb); - smk->pad = get_le32(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] = get_le32(pb); - } - for(i = 0; i < smk->frames; i++) { - smk->frm_flags[i] = get_byte(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 = CODEC_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); - /* handle possible audio streams */ - for(i = 0; i < 7; i++) { - smk->indexes[i] = -1; - if((smk->rates[i] & 0xFFFFFF) && !(smk->rates[i] & SMK_AUD_BINKAUD)){ - ast[i] = av_new_stream(s, 0); - smk->indexes[i] = ast[i]->index; - ast[i]->codec->codec_type = CODEC_TYPE_AUDIO; - ast[i]->codec->codec_id = (smk->rates[i] & SMK_AUD_PACKED) ? CODEC_ID_SMACKAUDIO : CODEC_ID_PCM_U8; - ast[i]->codec->codec_tag = MKTAG('S', 'M', 'K', 'A'); - 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_sample = (smk->rates[i] & SMK_AUD_16BITS) ? 16 : 8; - if(ast[i]->codec->bits_per_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_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 = get_buffer(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_IO; - } - ((int32_t*)st->codec->extradata)[0] = le2me_32(smk->mmap_size); - ((int32_t*)st->codec->extradata)[1] = le2me_32(smk->mclr_size); - ((int32_t*)st->codec->extradata)[2] = le2me_32(smk->full_size); - ((int32_t*)st->codec->extradata)[3] = le2me_32(smk->type_size); - - smk->curstream = -1; - smk->nextpos = url_ftell(pb); - - return 0; -} - - -static int smacker_read_packet(AVFormatContext *s, AVPacket *pkt) -{ - SmackerContext *smk = (SmackerContext *)s->priv_data; - int flags; - int ret; - int i; - int frame_size = 0; - int palchange = 0; - int pos; - - if (url_feof(&s->pb) || smk->cur_frame >= smk->frames) - return AVERROR(EIO); - - /* if we demuxed all streams, pass another frame */ - if(smk->curstream < 0) { - url_fseek(&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 = url_ftell(&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 = get_byte(&s->pb); - size = size * 4 - 1; - frame_size -= size; - frame_size--; - sz = 0; - pos = url_ftell(&s->pb) + size; - while(sz < 256){ - t = get_byte(&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 = get_byte(&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[get_byte(&s->pb) & 0x3F]; - *pal++ = smk_pal[get_byte(&s->pb) & 0x3F]; - sz++; - } - } - url_fseek(&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 = get_le32(&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 = get_buffer(&s->pb, smk->bufs[smk->curstream], size); - if(ret != size) - return AVERROR_IO; - smk->stream_id[smk->curstream] = smk->indexes[i]; - } - flags >>= 1; - } - if (av_new_packet(pkt, frame_size + 768)) - return AVERROR_NOMEM; - if(smk->frm_size[smk->cur_frame] & 1) - palchange |= 2; - pkt->data[0] = palchange; - memcpy(pkt->data + 1, smk->pal, 768); - ret = get_buffer(&s->pb, pkt->data + 769, frame_size); - if(ret != frame_size) - return AVERROR_IO; - pkt->stream_index = smk->videoindex; - pkt->size = ret + 769; - smk->cur_frame++; - smk->nextpos = url_ftell(&s->pb); - } else { - if (av_new_packet(pkt, smk->buf_sizes[smk->curstream])) - return AVERROR_NOMEM; - 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 = (SmackerContext *)s->priv_data; - int i; - - for(i = 0; i < 7; i++) - if(smk->bufs[i]) - av_free(smk->bufs[i]); - if(smk->frm_size) - av_free(smk->frm_size); - if(smk->frm_flags) - av_free(smk->frm_flags); - - return 0; -} - -AVInputFormat smacker_demuxer = { - "smk", - "Smacker Video", - sizeof(SmackerContext), - smacker_probe, - smacker_read_header, - smacker_read_packet, - smacker_read_close, -}; |