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')) 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); 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); 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) 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->is_ver4; /* 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; av_set_pts_info(ast[i], 33, smk->pts_inc, tbase); 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 = 0; 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; /* 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); 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;