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764 lines
24 KiB
764 lines
24 KiB
/* |
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* Apple ProRes compatible decoder |
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* |
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* Copyright (c) 2010-2011 Maxim Poliakovski |
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* |
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* This file is part of Libav. |
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* |
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* Libav 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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* Libav 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 Libav; 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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|
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/** |
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* @file |
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* This is a decoder for Apple ProRes 422 SD/HQ/LT/Proxy and ProRes 4444. |
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* It is used for storing and editing high definition video data in Apple's Final Cut Pro. |
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* |
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* @see http://wiki.multimedia.cx/index.php?title=Apple_ProRes |
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*/ |
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|
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#define LONG_BITSTREAM_READER // some ProRes vlc codes require up to 28 bits to be read at once |
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|
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#include <stdint.h> |
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|
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#include "libavutil/intmath.h" |
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#include "avcodec.h" |
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#include "dsputil.h" |
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#include "internal.h" |
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#include "proresdata.h" |
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#include "proresdsp.h" |
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#include "get_bits.h" |
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|
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typedef struct { |
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const uint8_t *index; ///< pointers to the data of this slice |
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int slice_num; |
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int x_pos, y_pos; |
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int slice_width; |
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int prev_slice_sf; ///< scalefactor of the previous decoded slice |
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DECLARE_ALIGNED(16, int16_t, blocks)[8 * 4 * 64]; |
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DECLARE_ALIGNED(16, int16_t, qmat_luma_scaled)[64]; |
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DECLARE_ALIGNED(16, int16_t, qmat_chroma_scaled)[64]; |
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} ProresThreadData; |
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typedef struct { |
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ProresDSPContext dsp; |
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AVFrame *frame; |
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ScanTable scantable; |
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int scantable_type; ///< -1 = uninitialized, 0 = progressive, 1/2 = interlaced |
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int frame_type; ///< 0 = progressive, 1 = top-field first, 2 = bottom-field first |
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int pic_format; ///< 2 = 422, 3 = 444 |
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uint8_t qmat_luma[64]; ///< dequantization matrix for luma |
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uint8_t qmat_chroma[64]; ///< dequantization matrix for chroma |
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int qmat_changed; ///< 1 - global quantization matrices changed |
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int total_slices; ///< total number of slices in a picture |
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ProresThreadData *slice_data; |
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int pic_num; |
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int chroma_factor; |
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int mb_chroma_factor; |
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int num_chroma_blocks; ///< number of chrominance blocks in a macroblock |
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int num_x_slices; |
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int num_y_slices; |
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int slice_width_factor; |
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int slice_height_factor; |
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int num_x_mbs; |
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int num_y_mbs; |
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int alpha_info; |
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} ProresContext; |
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static av_cold int decode_init(AVCodecContext *avctx) |
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{ |
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ProresContext *ctx = avctx->priv_data; |
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ctx->total_slices = 0; |
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ctx->slice_data = NULL; |
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avctx->bits_per_raw_sample = PRORES_BITS_PER_SAMPLE; |
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ff_proresdsp_init(&ctx->dsp); |
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ctx->scantable_type = -1; // set scantable type to uninitialized |
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memset(ctx->qmat_luma, 4, 64); |
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memset(ctx->qmat_chroma, 4, 64); |
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return 0; |
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} |
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static int decode_frame_header(ProresContext *ctx, const uint8_t *buf, |
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const int data_size, AVCodecContext *avctx) |
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{ |
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int hdr_size, version, width, height, flags; |
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const uint8_t *ptr; |
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hdr_size = AV_RB16(buf); |
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if (hdr_size > data_size) { |
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av_log(avctx, AV_LOG_ERROR, "frame data too small\n"); |
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return AVERROR_INVALIDDATA; |
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} |
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version = AV_RB16(buf + 2); |
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if (version >= 2) { |
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av_log(avctx, AV_LOG_ERROR, |
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"unsupported header version: %d\n", version); |
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return AVERROR_INVALIDDATA; |
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} |
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width = AV_RB16(buf + 8); |
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height = AV_RB16(buf + 10); |
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if (width != avctx->width || height != avctx->height) { |
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av_log(avctx, AV_LOG_ERROR, |
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"picture dimension changed: old: %d x %d, new: %d x %d\n", |
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avctx->width, avctx->height, width, height); |
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return AVERROR_INVALIDDATA; |
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} |
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ctx->frame_type = (buf[12] >> 2) & 3; |
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if (ctx->frame_type > 2) { |
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av_log(avctx, AV_LOG_ERROR, |
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"unsupported frame type: %d\n", ctx->frame_type); |
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return AVERROR_INVALIDDATA; |
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} |
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ctx->chroma_factor = (buf[12] >> 6) & 3; |
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ctx->mb_chroma_factor = ctx->chroma_factor + 2; |
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ctx->num_chroma_blocks = (1 << ctx->chroma_factor) >> 1; |
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ctx->alpha_info = buf[17] & 0xf; |
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if (ctx->alpha_info > 2) { |
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av_log(avctx, AV_LOG_ERROR, "Invalid alpha mode %d\n", ctx->alpha_info); |
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return AVERROR_INVALIDDATA; |
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} |
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switch (ctx->chroma_factor) { |
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case 2: |
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avctx->pix_fmt = ctx->alpha_info ? AV_PIX_FMT_YUVA422P10 |
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: AV_PIX_FMT_YUV422P10; |
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break; |
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case 3: |
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avctx->pix_fmt = ctx->alpha_info ? AV_PIX_FMT_YUVA444P10 |
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: AV_PIX_FMT_YUV444P10; |
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break; |
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default: |
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av_log(avctx, AV_LOG_ERROR, |
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"unsupported picture format: %d\n", ctx->pic_format); |
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return AVERROR_INVALIDDATA; |
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} |
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if (ctx->scantable_type != ctx->frame_type) { |
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if (!ctx->frame_type) |
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ff_init_scantable(ctx->dsp.idct_permutation, &ctx->scantable, |
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ff_prores_progressive_scan); |
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else |
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ff_init_scantable(ctx->dsp.idct_permutation, &ctx->scantable, |
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ff_prores_interlaced_scan); |
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ctx->scantable_type = ctx->frame_type; |
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} |
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if (ctx->frame_type) { /* if interlaced */ |
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ctx->frame->interlaced_frame = 1; |
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ctx->frame->top_field_first = ctx->frame_type & 1; |
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} else { |
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ctx->frame->interlaced_frame = 0; |
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} |
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avctx->color_primaries = buf[14]; |
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avctx->color_trc = buf[15]; |
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avctx->colorspace = buf[16]; |
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ctx->qmat_changed = 0; |
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ptr = buf + 20; |
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flags = buf[19]; |
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if (flags & 2) { |
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if (ptr - buf > hdr_size - 64) { |
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av_log(avctx, AV_LOG_ERROR, "header data too small\n"); |
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return AVERROR_INVALIDDATA; |
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} |
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if (memcmp(ctx->qmat_luma, ptr, 64)) { |
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memcpy(ctx->qmat_luma, ptr, 64); |
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ctx->qmat_changed = 1; |
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} |
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ptr += 64; |
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} else { |
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memset(ctx->qmat_luma, 4, 64); |
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ctx->qmat_changed = 1; |
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} |
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if (flags & 1) { |
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if (ptr - buf > hdr_size - 64) { |
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av_log(avctx, AV_LOG_ERROR, "header data too small\n"); |
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return -1; |
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} |
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if (memcmp(ctx->qmat_chroma, ptr, 64)) { |
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memcpy(ctx->qmat_chroma, ptr, 64); |
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ctx->qmat_changed = 1; |
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} |
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} else { |
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memset(ctx->qmat_chroma, 4, 64); |
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ctx->qmat_changed = 1; |
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} |
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return hdr_size; |
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} |
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static int decode_picture_header(ProresContext *ctx, const uint8_t *buf, |
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const int data_size, AVCodecContext *avctx) |
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{ |
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int i, hdr_size, pic_data_size, num_slices; |
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int slice_width_factor, slice_height_factor; |
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int remainder, num_x_slices; |
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const uint8_t *data_ptr, *index_ptr; |
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hdr_size = data_size > 0 ? buf[0] >> 3 : 0; |
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if (hdr_size < 8 || hdr_size > data_size) { |
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av_log(avctx, AV_LOG_ERROR, "picture header too small\n"); |
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return AVERROR_INVALIDDATA; |
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} |
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pic_data_size = AV_RB32(buf + 1); |
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if (pic_data_size > data_size) { |
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av_log(avctx, AV_LOG_ERROR, "picture data too small\n"); |
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return AVERROR_INVALIDDATA; |
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} |
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slice_width_factor = buf[7] >> 4; |
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slice_height_factor = buf[7] & 0xF; |
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if (slice_width_factor > 3 || slice_height_factor) { |
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av_log(avctx, AV_LOG_ERROR, |
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"unsupported slice dimension: %d x %d\n", |
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1 << slice_width_factor, 1 << slice_height_factor); |
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return AVERROR_INVALIDDATA; |
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} |
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ctx->slice_width_factor = slice_width_factor; |
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ctx->slice_height_factor = slice_height_factor; |
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ctx->num_x_mbs = (avctx->width + 15) >> 4; |
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ctx->num_y_mbs = (avctx->height + |
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(1 << (4 + ctx->frame->interlaced_frame)) - 1) >> |
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(4 + ctx->frame->interlaced_frame); |
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remainder = ctx->num_x_mbs & ((1 << slice_width_factor) - 1); |
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num_x_slices = (ctx->num_x_mbs >> slice_width_factor) + (remainder & 1) + |
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((remainder >> 1) & 1) + ((remainder >> 2) & 1); |
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num_slices = num_x_slices * ctx->num_y_mbs; |
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if (num_slices != AV_RB16(buf + 5)) { |
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av_log(avctx, AV_LOG_ERROR, "invalid number of slices\n"); |
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return AVERROR_INVALIDDATA; |
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} |
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if (ctx->total_slices != num_slices) { |
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av_freep(&ctx->slice_data); |
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ctx->slice_data = av_malloc((num_slices + 1) * sizeof(ctx->slice_data[0])); |
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if (!ctx->slice_data) |
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return AVERROR(ENOMEM); |
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ctx->total_slices = num_slices; |
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} |
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if (hdr_size + num_slices * 2 > data_size) { |
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av_log(avctx, AV_LOG_ERROR, "slice table too small\n"); |
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return AVERROR_INVALIDDATA; |
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} |
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/* parse slice table allowing quick access to the slice data */ |
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index_ptr = buf + hdr_size; |
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data_ptr = index_ptr + num_slices * 2; |
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for (i = 0; i < num_slices; i++) { |
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ctx->slice_data[i].index = data_ptr; |
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ctx->slice_data[i].prev_slice_sf = 0; |
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data_ptr += AV_RB16(index_ptr + i * 2); |
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} |
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ctx->slice_data[i].index = data_ptr; |
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ctx->slice_data[i].prev_slice_sf = 0; |
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if (data_ptr > buf + data_size) { |
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av_log(avctx, AV_LOG_ERROR, "out of slice data\n"); |
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return -1; |
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} |
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return pic_data_size; |
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} |
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/** |
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* Read an unsigned rice/exp golomb codeword. |
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*/ |
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static inline int decode_vlc_codeword(GetBitContext *gb, unsigned codebook) |
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{ |
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unsigned int rice_order, exp_order, switch_bits; |
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unsigned int buf, code; |
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int log, prefix_len, len; |
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OPEN_READER(re, gb); |
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UPDATE_CACHE(re, gb); |
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buf = GET_CACHE(re, gb); |
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/* number of prefix bits to switch between Rice and expGolomb */ |
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switch_bits = (codebook & 3) + 1; |
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rice_order = codebook >> 5; /* rice code order */ |
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exp_order = (codebook >> 2) & 7; /* exp golomb code order */ |
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log = 31 - av_log2(buf); /* count prefix bits (zeroes) */ |
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if (log < switch_bits) { /* ok, we got a rice code */ |
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if (!rice_order) { |
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/* shortcut for faster decoding of rice codes without remainder */ |
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code = log; |
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LAST_SKIP_BITS(re, gb, log + 1); |
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} else { |
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prefix_len = log + 1; |
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code = (log << rice_order) + NEG_USR32(buf << prefix_len, rice_order); |
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LAST_SKIP_BITS(re, gb, prefix_len + rice_order); |
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} |
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} else { /* otherwise we got a exp golomb code */ |
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len = (log << 1) - switch_bits + exp_order + 1; |
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code = NEG_USR32(buf, len) - (1 << exp_order) + (switch_bits << rice_order); |
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LAST_SKIP_BITS(re, gb, len); |
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} |
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CLOSE_READER(re, gb); |
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return code; |
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} |
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#define LSB2SIGN(x) (-((x) & 1)) |
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#define TOSIGNED(x) (((x) >> 1) ^ LSB2SIGN(x)) |
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/** |
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* Decode DC coefficients for all blocks in a slice. |
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*/ |
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static inline void decode_dc_coeffs(GetBitContext *gb, int16_t *out, |
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int nblocks) |
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{ |
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int16_t prev_dc; |
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int i, sign; |
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int16_t delta; |
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unsigned int code; |
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code = decode_vlc_codeword(gb, FIRST_DC_CB); |
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out[0] = prev_dc = TOSIGNED(code); |
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out += 64; /* move to the DC coeff of the next block */ |
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delta = 3; |
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for (i = 1; i < nblocks; i++, out += 64) { |
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code = decode_vlc_codeword(gb, ff_prores_dc_codebook[FFMIN(FFABS(delta), 3)]); |
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sign = -(((delta >> 15) & 1) ^ (code & 1)); |
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delta = (((code + 1) >> 1) ^ sign) - sign; |
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prev_dc += delta; |
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out[0] = prev_dc; |
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} |
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} |
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/** |
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* Decode AC coefficients for all blocks in a slice. |
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*/ |
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static inline void decode_ac_coeffs(GetBitContext *gb, int16_t *out, |
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int blocks_per_slice, |
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int plane_size_factor, |
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const uint8_t *scan) |
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{ |
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int pos, block_mask, run, level, sign, run_cb_index, lev_cb_index; |
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int max_coeffs, bits_left; |
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|
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/* set initial prediction values */ |
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run = 4; |
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level = 2; |
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max_coeffs = blocks_per_slice << 6; |
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block_mask = blocks_per_slice - 1; |
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for (pos = blocks_per_slice - 1; pos < max_coeffs;) { |
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run_cb_index = ff_prores_run_to_cb_index[FFMIN(run, 15)]; |
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lev_cb_index = ff_prores_lev_to_cb_index[FFMIN(level, 9)]; |
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bits_left = get_bits_left(gb); |
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if (bits_left <= 0 || (bits_left <= 8 && !show_bits(gb, bits_left))) |
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return; |
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run = decode_vlc_codeword(gb, ff_prores_ac_codebook[run_cb_index]); |
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bits_left = get_bits_left(gb); |
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if (bits_left <= 0 || (bits_left <= 8 && !show_bits(gb, bits_left))) |
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return; |
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level = decode_vlc_codeword(gb, ff_prores_ac_codebook[lev_cb_index]) + 1; |
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pos += run + 1; |
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if (pos >= max_coeffs) |
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break; |
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sign = get_sbits(gb, 1); |
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out[((pos & block_mask) << 6) + scan[pos >> plane_size_factor]] = |
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(level ^ sign) - sign; |
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} |
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} |
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/** |
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* Decode a slice plane (luma or chroma). |
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*/ |
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static void decode_slice_plane(ProresContext *ctx, ProresThreadData *td, |
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const uint8_t *buf, |
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int data_size, uint16_t *out_ptr, |
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int linesize, int mbs_per_slice, |
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int blocks_per_mb, int plane_size_factor, |
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const int16_t *qmat, int is_chroma) |
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{ |
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GetBitContext gb; |
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int16_t *block_ptr; |
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int mb_num, blocks_per_slice; |
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blocks_per_slice = mbs_per_slice * blocks_per_mb; |
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|
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memset(td->blocks, 0, 8 * 4 * 64 * sizeof(*td->blocks)); |
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init_get_bits(&gb, buf, data_size << 3); |
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decode_dc_coeffs(&gb, td->blocks, blocks_per_slice); |
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|
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decode_ac_coeffs(&gb, td->blocks, blocks_per_slice, |
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plane_size_factor, ctx->scantable.permutated); |
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|
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/* inverse quantization, inverse transform and output */ |
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block_ptr = td->blocks; |
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|
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if (!is_chroma) { |
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for (mb_num = 0; mb_num < mbs_per_slice; mb_num++, out_ptr += blocks_per_mb * 4) { |
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ctx->dsp.idct_put(out_ptr, linesize, block_ptr, qmat); |
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block_ptr += 64; |
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if (blocks_per_mb > 2) { |
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ctx->dsp.idct_put(out_ptr + 8, linesize, block_ptr, qmat); |
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block_ptr += 64; |
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} |
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ctx->dsp.idct_put(out_ptr + linesize * 4, linesize, block_ptr, qmat); |
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block_ptr += 64; |
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if (blocks_per_mb > 2) { |
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ctx->dsp.idct_put(out_ptr + linesize * 4 + 8, linesize, block_ptr, qmat); |
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block_ptr += 64; |
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} |
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} |
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} else { |
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for (mb_num = 0; mb_num < mbs_per_slice; mb_num++, out_ptr += blocks_per_mb * 4) { |
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ctx->dsp.idct_put(out_ptr, linesize, block_ptr, qmat); |
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block_ptr += 64; |
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ctx->dsp.idct_put(out_ptr + linesize * 4, linesize, block_ptr, qmat); |
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block_ptr += 64; |
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if (blocks_per_mb > 2) { |
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ctx->dsp.idct_put(out_ptr + 8, linesize, block_ptr, qmat); |
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block_ptr += 64; |
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ctx->dsp.idct_put(out_ptr + linesize * 4 + 8, linesize, block_ptr, qmat); |
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block_ptr += 64; |
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} |
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} |
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} |
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} |
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|
|
|
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static void unpack_alpha(GetBitContext *gb, uint16_t *dst, int num_coeffs, |
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const int num_bits) |
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{ |
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const int mask = (1 << num_bits) - 1; |
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int i, idx, val, alpha_val; |
|
|
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idx = 0; |
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alpha_val = mask; |
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do { |
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do { |
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if (get_bits1(gb)) |
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val = get_bits(gb, num_bits); |
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else { |
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int sign; |
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val = get_bits(gb, num_bits == 16 ? 7 : 4); |
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sign = val & 1; |
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val = (val + 2) >> 1; |
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if (sign) |
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val = -val; |
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} |
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alpha_val = (alpha_val + val) & mask; |
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if (num_bits == 16) |
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dst[idx++] = alpha_val >> 6; |
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else |
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dst[idx++] = (alpha_val << 2) | (alpha_val >> 6); |
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if (idx >= num_coeffs - 1) |
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break; |
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} while (get_bits1(gb)); |
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val = get_bits(gb, 4); |
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if (!val) |
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val = get_bits(gb, 11); |
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if (idx + val > num_coeffs) |
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val = num_coeffs - idx; |
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if (num_bits == 16) |
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for (i = 0; i < val; i++) |
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dst[idx++] = alpha_val >> 6; |
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else |
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for (i = 0; i < val; i++) |
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dst[idx++] = (alpha_val << 2) | (alpha_val >> 6); |
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} while (idx < num_coeffs); |
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} |
|
|
|
/** |
|
* Decode alpha slice plane. |
|
*/ |
|
static void decode_alpha_plane(ProresContext *ctx, ProresThreadData *td, |
|
const uint8_t *buf, int data_size, |
|
uint16_t *out_ptr, int linesize, |
|
int mbs_per_slice) |
|
{ |
|
GetBitContext gb; |
|
int i; |
|
uint16_t *block_ptr; |
|
|
|
memset(td->blocks, 0, 8 * 4 * 64 * sizeof(*td->blocks)); |
|
|
|
init_get_bits(&gb, buf, data_size << 3); |
|
|
|
if (ctx->alpha_info == 2) |
|
unpack_alpha(&gb, td->blocks, mbs_per_slice * 4 * 64, 16); |
|
else |
|
unpack_alpha(&gb, td->blocks, mbs_per_slice * 4 * 64, 8); |
|
|
|
block_ptr = td->blocks; |
|
|
|
for (i = 0; i < 16; i++) { |
|
memcpy(out_ptr, block_ptr, 16 * mbs_per_slice * sizeof(*out_ptr)); |
|
out_ptr += linesize >> 1; |
|
block_ptr += 16 * mbs_per_slice; |
|
} |
|
} |
|
|
|
static int decode_slice(AVCodecContext *avctx, void *tdata) |
|
{ |
|
ProresThreadData *td = tdata; |
|
ProresContext *ctx = avctx->priv_data; |
|
int mb_x_pos = td->x_pos; |
|
int mb_y_pos = td->y_pos; |
|
int pic_num = ctx->pic_num; |
|
int slice_num = td->slice_num; |
|
int mbs_per_slice = td->slice_width; |
|
const uint8_t *buf; |
|
uint8_t *y_data, *u_data, *v_data, *a_data; |
|
AVFrame *pic = ctx->frame; |
|
int i, sf, slice_width_factor; |
|
int slice_data_size, hdr_size; |
|
int y_data_size, u_data_size, v_data_size, a_data_size; |
|
int y_linesize, u_linesize, v_linesize, a_linesize; |
|
int coff[4]; |
|
|
|
buf = ctx->slice_data[slice_num].index; |
|
slice_data_size = ctx->slice_data[slice_num + 1].index - buf; |
|
|
|
slice_width_factor = av_log2(mbs_per_slice); |
|
|
|
y_data = pic->data[0]; |
|
u_data = pic->data[1]; |
|
v_data = pic->data[2]; |
|
a_data = pic->data[3]; |
|
y_linesize = pic->linesize[0]; |
|
u_linesize = pic->linesize[1]; |
|
v_linesize = pic->linesize[2]; |
|
a_linesize = pic->linesize[3]; |
|
|
|
if (pic->interlaced_frame) { |
|
if (!(pic_num ^ pic->top_field_first)) { |
|
y_data += y_linesize; |
|
u_data += u_linesize; |
|
v_data += v_linesize; |
|
if (a_data) |
|
a_data += a_linesize; |
|
} |
|
y_linesize <<= 1; |
|
u_linesize <<= 1; |
|
v_linesize <<= 1; |
|
a_linesize <<= 1; |
|
} |
|
y_data += (mb_y_pos << 4) * y_linesize + (mb_x_pos << 5); |
|
u_data += (mb_y_pos << 4) * u_linesize + (mb_x_pos << ctx->mb_chroma_factor); |
|
v_data += (mb_y_pos << 4) * v_linesize + (mb_x_pos << ctx->mb_chroma_factor); |
|
if (a_data) |
|
a_data += (mb_y_pos << 4) * a_linesize + (mb_x_pos << 5); |
|
|
|
if (slice_data_size < 6) { |
|
av_log(avctx, AV_LOG_ERROR, "slice data too small\n"); |
|
return AVERROR_INVALIDDATA; |
|
} |
|
|
|
/* parse slice header */ |
|
hdr_size = buf[0] >> 3; |
|
coff[0] = hdr_size; |
|
y_data_size = AV_RB16(buf + 2); |
|
coff[1] = coff[0] + y_data_size; |
|
u_data_size = AV_RB16(buf + 4); |
|
coff[2] = coff[1] + u_data_size; |
|
v_data_size = hdr_size > 7 ? AV_RB16(buf + 6) : slice_data_size - coff[2]; |
|
coff[3] = coff[2] + v_data_size; |
|
a_data_size = slice_data_size - coff[3]; |
|
|
|
/* if V or alpha component size is negative that means that previous |
|
component sizes are too large */ |
|
if (v_data_size < 0 || a_data_size < 0 || hdr_size < 6) { |
|
av_log(avctx, AV_LOG_ERROR, "invalid data size\n"); |
|
return AVERROR_INVALIDDATA; |
|
} |
|
|
|
sf = av_clip(buf[1], 1, 224); |
|
sf = sf > 128 ? (sf - 96) << 2 : sf; |
|
|
|
/* scale quantization matrixes according with slice's scale factor */ |
|
/* TODO: this can be SIMD-optimized a lot */ |
|
if (ctx->qmat_changed || sf != td->prev_slice_sf) { |
|
td->prev_slice_sf = sf; |
|
for (i = 0; i < 64; i++) { |
|
td->qmat_luma_scaled[ctx->dsp.idct_permutation[i]] = ctx->qmat_luma[i] * sf; |
|
td->qmat_chroma_scaled[ctx->dsp.idct_permutation[i]] = ctx->qmat_chroma[i] * sf; |
|
} |
|
} |
|
|
|
/* decode luma plane */ |
|
decode_slice_plane(ctx, td, buf + coff[0], y_data_size, |
|
(uint16_t*) y_data, y_linesize, |
|
mbs_per_slice, 4, slice_width_factor + 2, |
|
td->qmat_luma_scaled, 0); |
|
|
|
/* decode U chroma plane */ |
|
decode_slice_plane(ctx, td, buf + coff[1], u_data_size, |
|
(uint16_t*) u_data, u_linesize, |
|
mbs_per_slice, ctx->num_chroma_blocks, |
|
slice_width_factor + ctx->chroma_factor - 1, |
|
td->qmat_chroma_scaled, 1); |
|
|
|
/* decode V chroma plane */ |
|
decode_slice_plane(ctx, td, buf + coff[2], v_data_size, |
|
(uint16_t*) v_data, v_linesize, |
|
mbs_per_slice, ctx->num_chroma_blocks, |
|
slice_width_factor + ctx->chroma_factor - 1, |
|
td->qmat_chroma_scaled, 1); |
|
|
|
/* decode alpha plane if available */ |
|
if (a_data && a_data_size) |
|
decode_alpha_plane(ctx, td, buf + coff[3], a_data_size, |
|
(uint16_t*) a_data, a_linesize, |
|
mbs_per_slice); |
|
|
|
return 0; |
|
} |
|
|
|
|
|
static int decode_picture(ProresContext *ctx, int pic_num, |
|
AVCodecContext *avctx) |
|
{ |
|
int slice_num, slice_width, x_pos, y_pos; |
|
|
|
slice_num = 0; |
|
|
|
ctx->pic_num = pic_num; |
|
for (y_pos = 0; y_pos < ctx->num_y_mbs; y_pos++) { |
|
slice_width = 1 << ctx->slice_width_factor; |
|
|
|
for (x_pos = 0; x_pos < ctx->num_x_mbs && slice_width; |
|
x_pos += slice_width) { |
|
while (ctx->num_x_mbs - x_pos < slice_width) |
|
slice_width >>= 1; |
|
|
|
ctx->slice_data[slice_num].slice_num = slice_num; |
|
ctx->slice_data[slice_num].x_pos = x_pos; |
|
ctx->slice_data[slice_num].y_pos = y_pos; |
|
ctx->slice_data[slice_num].slice_width = slice_width; |
|
|
|
slice_num++; |
|
} |
|
} |
|
|
|
return avctx->execute(avctx, decode_slice, |
|
ctx->slice_data, NULL, slice_num, |
|
sizeof(ctx->slice_data[0])); |
|
} |
|
|
|
|
|
#define MOVE_DATA_PTR(nbytes) buf += (nbytes); buf_size -= (nbytes) |
|
|
|
static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame, |
|
AVPacket *avpkt) |
|
{ |
|
ProresContext *ctx = avctx->priv_data; |
|
const uint8_t *buf = avpkt->data; |
|
int buf_size = avpkt->size; |
|
int frame_hdr_size, pic_num, pic_data_size; |
|
|
|
ctx->frame = data; |
|
ctx->frame->pict_type = AV_PICTURE_TYPE_I; |
|
ctx->frame->key_frame = 1; |
|
|
|
/* check frame atom container */ |
|
if (buf_size < 28 || buf_size < AV_RB32(buf) || |
|
AV_RB32(buf + 4) != FRAME_ID) { |
|
av_log(avctx, AV_LOG_ERROR, "invalid frame\n"); |
|
return AVERROR_INVALIDDATA; |
|
} |
|
|
|
MOVE_DATA_PTR(8); |
|
|
|
frame_hdr_size = decode_frame_header(ctx, buf, buf_size, avctx); |
|
if (frame_hdr_size < 0) |
|
return AVERROR_INVALIDDATA; |
|
|
|
MOVE_DATA_PTR(frame_hdr_size); |
|
|
|
if (ff_get_buffer(avctx, ctx->frame, 0) < 0) |
|
return -1; |
|
|
|
for (pic_num = 0; ctx->frame->interlaced_frame - pic_num + 1; pic_num++) { |
|
pic_data_size = decode_picture_header(ctx, buf, buf_size, avctx); |
|
if (pic_data_size < 0) |
|
return AVERROR_INVALIDDATA; |
|
|
|
if (decode_picture(ctx, pic_num, avctx)) |
|
return -1; |
|
|
|
MOVE_DATA_PTR(pic_data_size); |
|
} |
|
|
|
ctx->frame = NULL; |
|
*got_frame = 1; |
|
|
|
return avpkt->size; |
|
} |
|
|
|
|
|
static av_cold int decode_close(AVCodecContext *avctx) |
|
{ |
|
ProresContext *ctx = avctx->priv_data; |
|
|
|
av_freep(&ctx->slice_data); |
|
|
|
return 0; |
|
} |
|
|
|
|
|
AVCodec ff_prores_decoder = { |
|
.name = "prores", |
|
.long_name = NULL_IF_CONFIG_SMALL("Apple ProRes (iCodec Pro)"), |
|
.type = AVMEDIA_TYPE_VIDEO, |
|
.id = AV_CODEC_ID_PRORES, |
|
.priv_data_size = sizeof(ProresContext), |
|
.init = decode_init, |
|
.close = decode_close, |
|
.decode = decode_frame, |
|
.capabilities = CODEC_CAP_DR1 | CODEC_CAP_SLICE_THREADS, |
|
};
|
|
|