From 233a5a807e766425190941a8226988a4332ca9ad Mon Sep 17 00:00:00 2001 From: Anton Khirnov Date: Mon, 8 Oct 2012 12:03:08 +0200 Subject: lavc: split asv12 encoder/decoder --- libavcodec/asvdec.c | 325 ++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 325 insertions(+) create mode 100644 libavcodec/asvdec.c (limited to 'libavcodec/asvdec.c') diff --git a/libavcodec/asvdec.c b/libavcodec/asvdec.c new file mode 100644 index 0000000000..ceb8f636a6 --- /dev/null +++ b/libavcodec/asvdec.c @@ -0,0 +1,325 @@ +/* + * Copyright (c) 2003 Michael Niedermayer + * + * 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 + */ + +/** + * @file + * ASUS V1/V2 decoder. + */ + +#include "libavutil/common.h" +#include "libavutil/mem.h" + +#include "asv.h" +#include "avcodec.h" +#include "put_bits.h" +#include "dsputil.h" +#include "mpeg12data.h" + +//#undef NDEBUG +//#include + +#define VLC_BITS 6 +#define ASV2_LEVEL_VLC_BITS 10 + +static VLC ccp_vlc; +static VLC level_vlc; +static VLC dc_ccp_vlc; +static VLC ac_ccp_vlc; +static VLC asv2_level_vlc; + +static av_cold void init_vlcs(ASV1Context *a){ + static int done = 0; + + if (!done) { + done = 1; + + INIT_VLC_STATIC(&ccp_vlc, VLC_BITS, 17, + &ff_asv_ccp_tab[0][1], 2, 1, + &ff_asv_ccp_tab[0][0], 2, 1, 64); + INIT_VLC_STATIC(&dc_ccp_vlc, VLC_BITS, 8, + &ff_asv_dc_ccp_tab[0][1], 2, 1, + &ff_asv_dc_ccp_tab[0][0], 2, 1, 64); + INIT_VLC_STATIC(&ac_ccp_vlc, VLC_BITS, 16, + &ff_asv_ac_ccp_tab[0][1], 2, 1, + &ff_asv_ac_ccp_tab[0][0], 2, 1, 64); + INIT_VLC_STATIC(&level_vlc, VLC_BITS, 7, + &ff_asv_level_tab[0][1], 2, 1, + &ff_asv_level_tab[0][0], 2, 1, 64); + INIT_VLC_STATIC(&asv2_level_vlc, ASV2_LEVEL_VLC_BITS, 63, + &ff_asv2_level_tab[0][1], 2, 1, + &ff_asv2_level_tab[0][0], 2, 1, 1024); + } +} + +//FIXME write a reversed bitstream reader to avoid the double reverse +static inline int asv2_get_bits(GetBitContext *gb, int n){ + return av_reverse[ get_bits(gb, n) << (8-n) ]; +} + +static inline int asv1_get_level(GetBitContext *gb){ + int code= get_vlc2(gb, level_vlc.table, VLC_BITS, 1); + + if(code==3) return get_sbits(gb, 8); + else return code - 3; +} + +static inline int asv2_get_level(GetBitContext *gb){ + int code= get_vlc2(gb, asv2_level_vlc.table, ASV2_LEVEL_VLC_BITS, 1); + + if(code==31) return (int8_t)asv2_get_bits(gb, 8); + else return code - 31; +} + +static inline int asv1_decode_block(ASV1Context *a, DCTELEM block[64]){ + int i; + + block[0]= 8*get_bits(&a->gb, 8); + + for(i=0; i<11; i++){ + const int ccp= get_vlc2(&a->gb, ccp_vlc.table, VLC_BITS, 1); + + if(ccp){ + if(ccp == 16) break; + if(ccp < 0 || i>=10){ + av_log(a->avctx, AV_LOG_ERROR, "coded coeff pattern damaged\n"); + return -1; + } + + if(ccp&8) block[a->scantable.permutated[4*i+0]]= (asv1_get_level(&a->gb) * a->intra_matrix[4*i+0])>>4; + if(ccp&4) block[a->scantable.permutated[4*i+1]]= (asv1_get_level(&a->gb) * a->intra_matrix[4*i+1])>>4; + if(ccp&2) block[a->scantable.permutated[4*i+2]]= (asv1_get_level(&a->gb) * a->intra_matrix[4*i+2])>>4; + if(ccp&1) block[a->scantable.permutated[4*i+3]]= (asv1_get_level(&a->gb) * a->intra_matrix[4*i+3])>>4; + } + } + + return 0; +} + +static inline int asv2_decode_block(ASV1Context *a, DCTELEM block[64]){ + int i, count, ccp; + + count= asv2_get_bits(&a->gb, 4); + + block[0]= 8*asv2_get_bits(&a->gb, 8); + + ccp= get_vlc2(&a->gb, dc_ccp_vlc.table, VLC_BITS, 1); + if(ccp){ + if(ccp&4) block[a->scantable.permutated[1]]= (asv2_get_level(&a->gb) * a->intra_matrix[1])>>4; + if(ccp&2) block[a->scantable.permutated[2]]= (asv2_get_level(&a->gb) * a->intra_matrix[2])>>4; + if(ccp&1) block[a->scantable.permutated[3]]= (asv2_get_level(&a->gb) * a->intra_matrix[3])>>4; + } + + for(i=1; igb, ac_ccp_vlc.table, VLC_BITS, 1); + + if(ccp){ + if(ccp&8) block[a->scantable.permutated[4*i+0]]= (asv2_get_level(&a->gb) * a->intra_matrix[4*i+0])>>4; + if(ccp&4) block[a->scantable.permutated[4*i+1]]= (asv2_get_level(&a->gb) * a->intra_matrix[4*i+1])>>4; + if(ccp&2) block[a->scantable.permutated[4*i+2]]= (asv2_get_level(&a->gb) * a->intra_matrix[4*i+2])>>4; + if(ccp&1) block[a->scantable.permutated[4*i+3]]= (asv2_get_level(&a->gb) * a->intra_matrix[4*i+3])>>4; + } + } + + return 0; +} + +static inline int decode_mb(ASV1Context *a, DCTELEM block[6][64]){ + int i; + + a->dsp.clear_blocks(block[0]); + + if(a->avctx->codec_id == AV_CODEC_ID_ASV1){ + for(i=0; i<6; i++){ + if( asv1_decode_block(a, block[i]) < 0) + return -1; + } + }else{ + for(i=0; i<6; i++){ + if( asv2_decode_block(a, block[i]) < 0) + return -1; + } + } + return 0; +} + +static inline void idct_put(ASV1Context *a, int mb_x, int mb_y){ + DCTELEM (*block)[64]= a->block; + int linesize= a->picture.linesize[0]; + + uint8_t *dest_y = a->picture.data[0] + (mb_y * 16* linesize ) + mb_x * 16; + uint8_t *dest_cb = a->picture.data[1] + (mb_y * 8 * a->picture.linesize[1]) + mb_x * 8; + uint8_t *dest_cr = a->picture.data[2] + (mb_y * 8 * a->picture.linesize[2]) + mb_x * 8; + + a->dsp.idct_put(dest_y , linesize, block[0]); + a->dsp.idct_put(dest_y + 8, linesize, block[1]); + a->dsp.idct_put(dest_y + 8*linesize , linesize, block[2]); + a->dsp.idct_put(dest_y + 8*linesize + 8, linesize, block[3]); + + if(!(a->avctx->flags&CODEC_FLAG_GRAY)){ + a->dsp.idct_put(dest_cb, a->picture.linesize[1], block[4]); + a->dsp.idct_put(dest_cr, a->picture.linesize[2], block[5]); + } +} + +static int decode_frame(AVCodecContext *avctx, + void *data, int *data_size, + AVPacket *avpkt) +{ + const uint8_t *buf = avpkt->data; + int buf_size = avpkt->size; + ASV1Context * const a = avctx->priv_data; + AVFrame *picture = data; + AVFrame * const p= &a->picture; + int mb_x, mb_y; + + if(p->data[0]) + avctx->release_buffer(avctx, p); + + p->reference= 0; + if(avctx->get_buffer(avctx, p) < 0){ + av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n"); + return -1; + } + p->pict_type= AV_PICTURE_TYPE_I; + p->key_frame= 1; + + av_fast_padded_malloc(&a->bitstream_buffer, &a->bitstream_buffer_size, + buf_size); + if (!a->bitstream_buffer) + return AVERROR(ENOMEM); + + if(avctx->codec_id == AV_CODEC_ID_ASV1) + a->dsp.bswap_buf((uint32_t*)a->bitstream_buffer, (const uint32_t*)buf, buf_size/4); + else{ + int i; + for(i=0; ibitstream_buffer[i]= av_reverse[ buf[i] ]; + } + + init_get_bits(&a->gb, a->bitstream_buffer, buf_size*8); + + for(mb_y=0; mb_ymb_height2; mb_y++){ + for(mb_x=0; mb_xmb_width2; mb_x++){ + if( decode_mb(a, a->block) <0) + return -1; + + idct_put(a, mb_x, mb_y); + } + } + + if(a->mb_width2 != a->mb_width){ + mb_x= a->mb_width2; + for(mb_y=0; mb_ymb_height2; mb_y++){ + if( decode_mb(a, a->block) <0) + return -1; + + idct_put(a, mb_x, mb_y); + } + } + + if(a->mb_height2 != a->mb_height){ + mb_y= a->mb_height2; + for(mb_x=0; mb_xmb_width; mb_x++){ + if( decode_mb(a, a->block) <0) + return -1; + + idct_put(a, mb_x, mb_y); + } + } + + *picture = a->picture; + *data_size = sizeof(AVPicture); + + emms_c(); + + return (get_bits_count(&a->gb)+31)/32*4; +} + +static av_cold int decode_init(AVCodecContext *avctx){ + ASV1Context * const a = avctx->priv_data; + AVFrame *p= &a->picture; + int i; + const int scale= avctx->codec_id == AV_CODEC_ID_ASV1 ? 1 : 2; + + ff_asv_common_init(avctx); + init_vlcs(a); + ff_init_scantable(a->dsp.idct_permutation, &a->scantable, ff_asv_scantab); + avctx->pix_fmt= AV_PIX_FMT_YUV420P; + + a->inv_qscale= avctx->extradata[0]; + if(a->inv_qscale == 0){ + av_log(avctx, AV_LOG_ERROR, "illegal qscale 0\n"); + if(avctx->codec_id == AV_CODEC_ID_ASV1) + a->inv_qscale= 6; + else + a->inv_qscale= 10; + } + + for(i=0; i<64; i++){ + int index = ff_asv_scantab[i]; + + a->intra_matrix[i]= 64*scale*ff_mpeg1_default_intra_matrix[index] / a->inv_qscale; + } + + p->qstride= a->mb_width; + p->qscale_table= av_malloc( p->qstride * a->mb_height); + p->quality= (32*scale + a->inv_qscale/2)/a->inv_qscale; + memset(p->qscale_table, p->quality, p->qstride*a->mb_height); + + return 0; +} + +static av_cold int decode_end(AVCodecContext *avctx){ + ASV1Context * const a = avctx->priv_data; + + av_freep(&a->bitstream_buffer); + av_freep(&a->picture.qscale_table); + a->bitstream_buffer_size=0; + + if(a->picture.data[0]) + avctx->release_buffer(avctx, &a->picture); + + return 0; +} + +AVCodec ff_asv1_decoder = { + .name = "asv1", + .type = AVMEDIA_TYPE_VIDEO, + .id = AV_CODEC_ID_ASV1, + .priv_data_size = sizeof(ASV1Context), + .init = decode_init, + .close = decode_end, + .decode = decode_frame, + .capabilities = CODEC_CAP_DR1, + .long_name = NULL_IF_CONFIG_SMALL("ASUS V1"), +}; + +AVCodec ff_asv2_decoder = { + .name = "asv2", + .type = AVMEDIA_TYPE_VIDEO, + .id = AV_CODEC_ID_ASV2, + .priv_data_size = sizeof(ASV1Context), + .init = decode_init, + .close = decode_end, + .decode = decode_frame, + .capabilities = CODEC_CAP_DR1, + .long_name = NULL_IF_CONFIG_SMALL("ASUS V2"), +}; + -- cgit v1.2.3