From cde7df25ef74b85b5ce11d9171779f28f0c12d15 Mon Sep 17 00:00:00 2001 From: Kostya Shishkov Date: Fri, 7 Feb 2014 09:35:07 +0100 Subject: Mirillis FIC video decoder Does not contain cursor rendering yet. Signed-off-by: Derek Buitenhuis --- libavcodec/fic.c | 298 +++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 298 insertions(+) create mode 100644 libavcodec/fic.c (limited to 'libavcodec/fic.c') diff --git a/libavcodec/fic.c b/libavcodec/fic.c new file mode 100644 index 0000000000..9a3bc3eb9c --- /dev/null +++ b/libavcodec/fic.c @@ -0,0 +1,298 @@ +/* + * Mirillis FIC decoder + * + * Copyright (c) 2014 Konstantin Shishkov + * Copyright (c) 2014 Derek Buitenhuis + * + * 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 + */ + +#include "libavutil/common.h" +#include "avcodec.h" +#include "internal.h" +#include "dsputil.h" +#include "get_bits.h" +#include "golomb.h" + +typedef struct FICThreadContext { + DECLARE_ALIGNED(16, int16_t, block)[64]; + uint8_t *src; + int slice_h; + int src_size; + int y_off; +} FICThreadContext; + +typedef struct FICContext { + AVCodecContext *avctx; + AVFrame *frame; + + DSPContext dsp; + ScanTable scantable; + + FICThreadContext *slice_data; + int slice_data_size; + + const uint8_t *qmat; + + enum AVPictureType cur_frame_type; + + int aligned_width, aligned_height; + int num_slices, slice_h; +} FICContext; + +static const uint8_t fic_qmat_hq[64] = { + 1, 2, 2, 2, 3, 3, 3, 4, + 2, 2, 2, 3, 3, 3, 4, 4, + 2, 2, 3, 3, 3, 4, 4, 4, + 2, 2, 3, 3, 3, 4, 4, 5, + 2, 3, 3, 3, 4, 4, 5, 6, + 3, 3, 3, 4, 4, 5, 6, 7, + 3, 3, 3, 4, 4, 5, 7, 7, + 3, 3, 4, 4, 5, 7, 7, 7, +}; + +static const uint8_t fic_qmat_lq[64] = { + 1, 5, 6, 7, 8, 9, 9, 11, + 5, 5, 7, 8, 9, 9, 11, 12, + 6, 7, 8, 9, 9, 11, 11, 12, + 7, 7, 8, 9, 9, 11, 12, 13, + 7, 8, 9, 9, 10, 11, 13, 16, + 8, 9, 9, 10, 11, 13, 16, 19, + 8, 9, 9, 11, 12, 15, 18, 23, + 9, 9, 11, 12, 15, 18, 23, 27 +}; + +static const uint8_t fic_header[7] = { 0, 0, 1, 'F', 'I', 'C', 'V' }; + +#define FIC_HEADER_SIZE 27 + +static int fic_decode_block(FICContext *ctx, GetBitContext *gb, + uint8_t *dst, int stride, int16_t *block) +{ + int i, num_coeff; + + /* Is it a skip block? */ + if (get_bits1(gb)) { + /* This is a P-frame. */ + ctx->frame->key_frame = 0; + ctx->frame->pict_type = AV_PICTURE_TYPE_P; + + return 0; + } + + ctx->dsp.clear_block(block); + + num_coeff = get_bits(gb, 7); + if (num_coeff > 64) + return AVERROR_INVALIDDATA; + + for (i = 0; i < num_coeff; i++) + block[ctx->scantable.permutated[i]] = get_se_golomb(gb) * ctx->qmat[i]; + + ctx->dsp.idct_put(dst, stride, block); + + return 0; +} + +static int fic_decode_slice(AVCodecContext *avctx, void *tdata) +{ + FICContext *ctx = avctx->priv_data; + FICThreadContext *tctx = tdata; + GetBitContext gb; + uint8_t *src = tctx->src; + int slice_h = tctx->slice_h; + int src_size = tctx->src_size; + int y_off = tctx->y_off; + int x, y, p; + + init_get_bits(&gb, src, src_size * 8); + + for (p = 0; p < 3; p++) { + int stride = ctx->frame->linesize[p]; + uint8_t* dst = ctx->frame->data[p] + (y_off >> !!p) * stride; + + for (y = 0; y < (slice_h >> !!p); y += 8) { + for (x = 0; x < (ctx->aligned_width >> !!p); x += 8) { + int ret; + + if ((ret = fic_decode_block(ctx, &gb, dst + x, stride, tctx->block)) != 0) + return ret; + } + + dst += 8 * stride; + } + } + + return 0; +} + +static int fic_decode_frame(AVCodecContext *avctx, void *data, + int *got_frame, AVPacket *avpkt) +{ + FICContext *ctx = avctx->priv_data; + uint8_t *src = avpkt->data; + int ret; + int slice, nslices; + int msize; + int tsize; + uint8_t *sdata; + + if ((ret = ff_reget_buffer(avctx, ctx->frame)) < 0) { + av_log(avctx, AV_LOG_ERROR, "reget_buffer() failed\n"); + return ret; + } + + /* Header + at least one slice (4) */ + if (avpkt->size < FIC_HEADER_SIZE + 4) { + av_log(avctx, AV_LOG_ERROR, "Frame data is too small.\n"); + return AVERROR_INVALIDDATA; + } + + /* Check for header. */ + if (memcmp(src, fic_header, 7)) + av_log(avctx, AV_LOG_WARNING, "Invalid FIC Header.\n"); + + nslices = src[13]; + if (!nslices) { + av_log(avctx, AV_LOG_ERROR, "Zero slices found.\n"); + return AVERROR_INVALIDDATA; + } + + /* High or Low Quality Matrix? */ + ctx->qmat = src[23] ? fic_qmat_hq : fic_qmat_lq; + + /* Skip cursor data. */ + tsize = AV_RB24(src + 24); + if (tsize > avpkt->size - FIC_HEADER_SIZE) { + av_log(avctx, AV_LOG_ERROR, "Invalid cursor data size.\n"); + return AVERROR_INVALIDDATA; + } + + /* Slice height for all but the last slice. */ + ctx->slice_h = 16 * (ctx->aligned_height >> 4) / nslices; + if (ctx->slice_h % 16) + ctx->slice_h = FFALIGN(ctx->slice_h - 16, 16); + + /* First slice offset and remaining data. */ + sdata = src + tsize + FIC_HEADER_SIZE + 4 * nslices; + msize = avpkt->size - nslices * 4 - tsize - FIC_HEADER_SIZE; + + if (msize <= 0) { + av_log(avctx, AV_LOG_ERROR, "Not enough frame data to decode.\n"); + return AVERROR_INVALIDDATA; + } + + /* + * Set the frametype to I initially. It will be set to P if the frame + * has any dependencies (skip blocks). There will be a race condition + * inside the slice decode function to set these, but we do not care. + * since they will only ever be set to 0/P. + */ + ctx->frame->key_frame = 1; + ctx->frame->pict_type = AV_PICTURE_TYPE_I; + + /* Allocate slice data. */ + av_fast_malloc(&ctx->slice_data, &ctx->slice_data_size, + nslices * sizeof(ctx->slice_data[0])); + if (!ctx->slice_data_size) { + av_log(avctx, AV_LOG_ERROR, "Could not allocate slice data.\n"); + return AVERROR(ENOMEM); + } + + for (slice = 0; slice < nslices; slice++) { + int slice_off = AV_RB32(src + tsize + FIC_HEADER_SIZE + slice * 4); + int slice_size; + int y_off = ctx->slice_h * slice; + int slice_h = ctx->slice_h; + + /* + * Either read the slice size, or consume all data left. + * Also, special case the last slight height. + */ + if (slice == nslices - 1) { + slice_size = msize; + slice_h = FFALIGN(avctx->height - ctx->slice_h * (nslices - 1), 16); + } else { + slice_size = AV_RB32(src + tsize + FIC_HEADER_SIZE + slice * 4 + 4); + } + + slice_size -= slice_off; + + if (slice_off > msize || slice_off + slice_size > msize) + continue; + + ctx->slice_data[slice].src = sdata + slice_off; + ctx->slice_data[slice].src_size = slice_size; + ctx->slice_data[slice].slice_h = slice_h; + ctx->slice_data[slice].y_off = y_off; + } + + if (ret = avctx->execute(avctx, fic_decode_slice, ctx->slice_data, + NULL, nslices, sizeof(ctx->slice_data[0])) < 0) + return ret; + + *got_frame = 1; + if ((ret = av_frame_ref(data, ctx->frame)) < 0) + return ret; + + return avpkt->size; +} + +static av_cold int fic_decode_close(AVCodecContext *avctx) +{ + FICContext *ctx = avctx->priv_data; + + av_freep(&ctx->slice_data); + av_frame_free(&ctx->frame); + + return 0; +} + +static av_cold int fic_decode_init(AVCodecContext *avctx) +{ + FICContext *ctx = avctx->priv_data; + + /* Initialize various context values */ + ctx->avctx = avctx; + ctx->aligned_width = FFALIGN(avctx->width, 16); + ctx->aligned_height = FFALIGN(avctx->height, 16); + + avctx->pix_fmt = AV_PIX_FMT_YUV420P; + avctx->bits_per_raw_sample = 8; + + ctx->frame = av_frame_alloc(); + if (!ctx->frame) + return AVERROR(ENOMEM); + + ff_dsputil_init(&ctx->dsp, avctx); + + ff_init_scantable(ctx->dsp.idct_permutation, &ctx->scantable, ff_zigzag_direct); + + return 0; +} + +AVCodec ff_fic_decoder = { + .name = "fic", + .long_name = NULL_IF_CONFIG_SMALL("Mirillis FIC"), + .type = AVMEDIA_TYPE_VIDEO, + .id = AV_CODEC_ID_FIC, + .priv_data_size = sizeof(FICContext), + .init = fic_decode_init, + .decode = fic_decode_frame, + .close = fic_decode_close, + .capabilities = CODEC_CAP_DR1 | CODEC_CAP_SLICE_THREADS, +}; -- cgit v1.2.3