mirror of https://github.com/FFmpeg/FFmpeg.git
* qatar/master: Mirillis FIC video decoder Conflicts: Changelog configure libavcodec/Makefile libavcodec/avcodec.h libavcodec/version.h Merged-by: Michael Niedermayer <michaelni@gmx.at>pull/43/merge
Michael Niedermayer
11 years ago
commit
0c4bf87b29
10 changed files with 315 additions and 2 deletions
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/*
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* Mirillis FIC decoder |
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* |
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* Copyright (c) 2014 Konstantin Shishkov |
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* Copyright (c) 2014 Derek Buitenhuis |
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* |
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* This file is part of FFmpeg. |
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* |
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* FFmpeg is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* FFmpeg is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with FFmpeg; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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#include "libavutil/common.h" |
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#include "avcodec.h" |
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#include "internal.h" |
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#include "dsputil.h" |
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#include "get_bits.h" |
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#include "golomb.h" |
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typedef struct FICThreadContext { |
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DECLARE_ALIGNED(16, int16_t, block)[64]; |
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uint8_t *src; |
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int slice_h; |
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int src_size; |
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int y_off; |
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} FICThreadContext; |
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typedef struct FICContext { |
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AVCodecContext *avctx; |
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AVFrame *frame; |
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DSPContext dsp; |
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ScanTable scantable; |
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FICThreadContext *slice_data; |
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int slice_data_size; |
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const uint8_t *qmat; |
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enum AVPictureType cur_frame_type; |
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int aligned_width, aligned_height; |
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int num_slices, slice_h; |
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} FICContext; |
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static const uint8_t fic_qmat_hq[64] = { |
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1, 2, 2, 2, 3, 3, 3, 4, |
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2, 2, 2, 3, 3, 3, 4, 4, |
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2, 2, 3, 3, 3, 4, 4, 4, |
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2, 2, 3, 3, 3, 4, 4, 5, |
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2, 3, 3, 3, 4, 4, 5, 6, |
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3, 3, 3, 4, 4, 5, 6, 7, |
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3, 3, 3, 4, 4, 5, 7, 7, |
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3, 3, 4, 4, 5, 7, 7, 7, |
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}; |
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static const uint8_t fic_qmat_lq[64] = { |
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1, 5, 6, 7, 8, 9, 9, 11, |
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5, 5, 7, 8, 9, 9, 11, 12, |
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6, 7, 8, 9, 9, 11, 11, 12, |
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7, 7, 8, 9, 9, 11, 12, 13, |
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7, 8, 9, 9, 10, 11, 13, 16, |
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8, 9, 9, 10, 11, 13, 16, 19, |
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8, 9, 9, 11, 12, 15, 18, 23, |
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9, 9, 11, 12, 15, 18, 23, 27 |
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}; |
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static const uint8_t fic_header[7] = { 0, 0, 1, 'F', 'I', 'C', 'V' }; |
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#define FIC_HEADER_SIZE 27 |
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static int fic_decode_block(FICContext *ctx, GetBitContext *gb, |
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uint8_t *dst, int stride, int16_t *block) |
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{ |
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int i, num_coeff; |
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/* Is it a skip block? */ |
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if (get_bits1(gb)) { |
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/* This is a P-frame. */ |
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ctx->frame->key_frame = 0; |
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ctx->frame->pict_type = AV_PICTURE_TYPE_P; |
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return 0; |
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} |
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ctx->dsp.clear_block(block); |
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num_coeff = get_bits(gb, 7); |
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if (num_coeff > 64) |
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return AVERROR_INVALIDDATA; |
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for (i = 0; i < num_coeff; i++) |
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block[ctx->scantable.permutated[i]] = get_se_golomb(gb) * ctx->qmat[i]; |
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ctx->dsp.idct_put(dst, stride, block); |
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return 0; |
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} |
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static int fic_decode_slice(AVCodecContext *avctx, void *tdata) |
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{ |
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FICContext *ctx = avctx->priv_data; |
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FICThreadContext *tctx = tdata; |
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GetBitContext gb; |
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uint8_t *src = tctx->src; |
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int slice_h = tctx->slice_h; |
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int src_size = tctx->src_size; |
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int y_off = tctx->y_off; |
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int x, y, p; |
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init_get_bits(&gb, src, src_size * 8); |
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for (p = 0; p < 3; p++) { |
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int stride = ctx->frame->linesize[p]; |
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uint8_t* dst = ctx->frame->data[p] + (y_off >> !!p) * stride; |
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for (y = 0; y < (slice_h >> !!p); y += 8) { |
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for (x = 0; x < (ctx->aligned_width >> !!p); x += 8) { |
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int ret; |
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if ((ret = fic_decode_block(ctx, &gb, dst + x, stride, tctx->block)) != 0) |
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return ret; |
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} |
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dst += 8 * stride; |
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} |
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} |
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return 0; |
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} |
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static int fic_decode_frame(AVCodecContext *avctx, void *data, |
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int *got_frame, AVPacket *avpkt) |
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{ |
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FICContext *ctx = avctx->priv_data; |
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uint8_t *src = avpkt->data; |
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int ret; |
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int slice, nslices; |
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int msize; |
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int tsize; |
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uint8_t *sdata; |
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if ((ret = ff_reget_buffer(avctx, ctx->frame)) < 0) { |
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av_log(avctx, AV_LOG_ERROR, "reget_buffer() failed\n"); |
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return ret; |
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} |
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/* Header + at least one slice (4) */ |
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if (avpkt->size < FIC_HEADER_SIZE + 4) { |
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av_log(avctx, AV_LOG_ERROR, "Frame data is too small.\n"); |
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return AVERROR_INVALIDDATA; |
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} |
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/* Check for header. */ |
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if (memcmp(src, fic_header, 7)) |
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av_log(avctx, AV_LOG_WARNING, "Invalid FIC Header.\n"); |
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nslices = src[13]; |
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if (!nslices) { |
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av_log(avctx, AV_LOG_ERROR, "Zero slices found.\n"); |
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return AVERROR_INVALIDDATA; |
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} |
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/* High or Low Quality Matrix? */ |
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ctx->qmat = src[23] ? fic_qmat_hq : fic_qmat_lq; |
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/* Skip cursor data. */ |
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tsize = AV_RB24(src + 24); |
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if (tsize > avpkt->size - FIC_HEADER_SIZE) { |
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av_log(avctx, AV_LOG_ERROR, "Invalid cursor data size.\n"); |
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return AVERROR_INVALIDDATA; |
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} |
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/* Slice height for all but the last slice. */ |
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ctx->slice_h = 16 * (ctx->aligned_height >> 4) / nslices; |
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if (ctx->slice_h % 16) |
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ctx->slice_h = FFALIGN(ctx->slice_h - 16, 16); |
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/* First slice offset and remaining data. */ |
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sdata = src + tsize + FIC_HEADER_SIZE + 4 * nslices; |
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msize = avpkt->size - nslices * 4 - tsize - FIC_HEADER_SIZE; |
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if (msize <= 0) { |
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av_log(avctx, AV_LOG_ERROR, "Not enough frame data to decode.\n"); |
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return AVERROR_INVALIDDATA; |
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} |
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/*
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* Set the frametype to I initially. It will be set to P if the frame |
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* has any dependencies (skip blocks). There will be a race condition |
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* inside the slice decode function to set these, but we do not care. |
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* since they will only ever be set to 0/P. |
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*/ |
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ctx->frame->key_frame = 1; |
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ctx->frame->pict_type = AV_PICTURE_TYPE_I; |
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/* Allocate slice data. */ |
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av_fast_malloc(&ctx->slice_data, &ctx->slice_data_size, |
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nslices * sizeof(ctx->slice_data[0])); |
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if (!ctx->slice_data_size) { |
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av_log(avctx, AV_LOG_ERROR, "Could not allocate slice data.\n"); |
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return AVERROR(ENOMEM); |
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} |
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for (slice = 0; slice < nslices; slice++) { |
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int slice_off = AV_RB32(src + tsize + FIC_HEADER_SIZE + slice * 4); |
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int slice_size; |
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int y_off = ctx->slice_h * slice; |
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int slice_h = ctx->slice_h; |
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/*
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* Either read the slice size, or consume all data left. |
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* Also, special case the last slight height. |
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*/ |
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if (slice == nslices - 1) { |
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slice_size = msize; |
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slice_h = FFALIGN(avctx->height - ctx->slice_h * (nslices - 1), 16); |
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} else { |
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slice_size = AV_RB32(src + tsize + FIC_HEADER_SIZE + slice * 4 + 4); |
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} |
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slice_size -= slice_off; |
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if (slice_off > msize || slice_off + slice_size > msize) |
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continue; |
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ctx->slice_data[slice].src = sdata + slice_off; |
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ctx->slice_data[slice].src_size = slice_size; |
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ctx->slice_data[slice].slice_h = slice_h; |
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ctx->slice_data[slice].y_off = y_off; |
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} |
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if (ret = avctx->execute(avctx, fic_decode_slice, ctx->slice_data, |
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NULL, nslices, sizeof(ctx->slice_data[0])) < 0) |
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return ret; |
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*got_frame = 1; |
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if ((ret = av_frame_ref(data, ctx->frame)) < 0) |
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return ret; |
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return avpkt->size; |
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} |
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static av_cold int fic_decode_close(AVCodecContext *avctx) |
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{ |
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FICContext *ctx = avctx->priv_data; |
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av_freep(&ctx->slice_data); |
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av_frame_free(&ctx->frame); |
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return 0; |
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} |
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static av_cold int fic_decode_init(AVCodecContext *avctx) |
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{ |
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FICContext *ctx = avctx->priv_data; |
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/* Initialize various context values */ |
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ctx->avctx = avctx; |
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ctx->aligned_width = FFALIGN(avctx->width, 16); |
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ctx->aligned_height = FFALIGN(avctx->height, 16); |
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avctx->pix_fmt = AV_PIX_FMT_YUV420P; |
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avctx->bits_per_raw_sample = 8; |
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ctx->frame = av_frame_alloc(); |
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if (!ctx->frame) |
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return AVERROR(ENOMEM); |
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ff_dsputil_init(&ctx->dsp, avctx); |
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ff_init_scantable(ctx->dsp.idct_permutation, &ctx->scantable, ff_zigzag_direct); |
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return 0; |
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} |
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AVCodec ff_fic_decoder = { |
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.name = "fic", |
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.long_name = NULL_IF_CONFIG_SMALL("Mirillis FIC"), |
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.type = AVMEDIA_TYPE_VIDEO, |
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.id = AV_CODEC_ID_FIC, |
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.priv_data_size = sizeof(FICContext), |
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.init = fic_decode_init, |
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.decode = fic_decode_frame, |
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.close = fic_decode_close, |
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.capabilities = CODEC_CAP_DR1 | CODEC_CAP_SLICE_THREADS, |
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}; |
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