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/* |
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* FFV1 codec for libavcodec |
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* |
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* Copyright (c) 2003-2013 Michael Niedermayer <michaelni@gmx.at> |
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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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/** |
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* @file |
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* FF Video Codec 1 (a lossless codec) |
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*/ |
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#include "libavutil/attributes.h" |
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#include "libavutil/avassert.h" |
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#include "libavutil/crc.h" |
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#include "libavutil/opt.h" |
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#include "libavutil/imgutils.h" |
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#include "libavutil/pixdesc.h" |
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#include "avcodec.h" |
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#include "internal.h" |
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#include "rangecoder.h" |
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#include "mathops.h" |
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#include "ffv1.h" |
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av_cold int ff_ffv1_common_init(AVCodecContext *avctx) |
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{ |
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FFV1Context *s = avctx->priv_data; |
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✓✗✗✓
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if (!avctx->width || !avctx->height) |
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return AVERROR_INVALIDDATA; |
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s->avctx = avctx; |
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s->flags = avctx->flags; |
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s->picture.f = av_frame_alloc(); |
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s->last_picture.f = av_frame_alloc(); |
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✓✗✗✓
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if (!s->picture.f || !s->last_picture.f) |
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return AVERROR(ENOMEM); |
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s->width = avctx->width; |
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s->height = avctx->height; |
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// defaults |
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s->num_h_slices = 1; |
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s->num_v_slices = 1; |
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return 0; |
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} |
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av_cold int ff_ffv1_init_slice_state(FFV1Context *f, FFV1Context *fs) |
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{ |
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int j, i; |
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fs->plane_count = f->plane_count; |
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fs->transparency = f->transparency; |
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✓✓ |
30372 |
for (j = 0; j < f->plane_count; j++) { |
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20248 |
PlaneContext *const p = &fs->plane[j]; |
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✓✓ |
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if (fs->ac != AC_GOLOMB_RICE) { |
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✓✓ |
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if (!p->state) |
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p->state = av_malloc_array(p->context_count, CONTEXT_SIZE * |
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sizeof(uint8_t)); |
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✗✓ |
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if (!p->state) |
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return AVERROR(ENOMEM); |
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} else { |
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✓✓ |
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if (!p->vlc_state) { |
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p->vlc_state = av_mallocz_array(p->context_count, sizeof(VlcState)); |
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✗✓ |
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if (!p->vlc_state) |
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return AVERROR(ENOMEM); |
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✓✓ |
213640 |
for (i = 0; i < p->context_count; i++) { |
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p->vlc_state[i].error_sum = 4; |
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p->vlc_state[i].count = 1; |
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} |
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} |
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} |
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} |
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✓✓ |
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if (fs->ac == AC_RANGE_CUSTOM_TAB) { |
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//FIXME only redo if state_transition changed |
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✓✓ |
1270784 |
for (j = 1; j < 256; j++) { |
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fs->c. one_state[ j] = f->state_transition[j]; |
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1265820 |
fs->c.zero_state[256 - j] = 256 - fs->c.one_state[j]; |
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} |
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} |
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return 0; |
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} |
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av_cold int ff_ffv1_init_slices_state(FFV1Context *f) |
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{ |
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int i, ret; |
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✓✓ |
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for (i = 0; i < f->max_slice_count; i++) { |
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FFV1Context *fs = f->slice_context[i]; |
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✗✓ |
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if ((ret = ff_ffv1_init_slice_state(f, fs)) < 0) |
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return AVERROR(ENOMEM); |
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} |
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return 0; |
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} |
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av_cold int ff_ffv1_init_slice_contexts(FFV1Context *f) |
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{ |
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int i, max_slice_count = f->num_h_slices * f->num_v_slices; |
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✗✓ |
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av_assert0(max_slice_count > 0); |
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✓✓ |
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for (i = 0; i < max_slice_count;) { |
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int sx = i % f->num_h_slices; |
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int sy = i / f->num_h_slices; |
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int sxs = f->avctx->width * sx / f->num_h_slices; |
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int sxe = f->avctx->width * (sx + 1) / f->num_h_slices; |
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int sys = f->avctx->height * sy / f->num_v_slices; |
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int sye = f->avctx->height * (sy + 1) / f->num_v_slices; |
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FFV1Context *fs = av_mallocz(sizeof(*fs)); |
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✗✓ |
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if (!fs) |
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goto memfail; |
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f->slice_context[i++] = fs; |
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memcpy(fs, f, sizeof(*fs)); |
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memset(fs->rc_stat2, 0, sizeof(fs->rc_stat2)); |
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fs->slice_width = sxe - sxs; |
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fs->slice_height = sye - sys; |
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fs->slice_x = sxs; |
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fs->slice_y = sys; |
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fs->sample_buffer = av_malloc_array((fs->width + 6), 3 * MAX_PLANES * |
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sizeof(*fs->sample_buffer)); |
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fs->sample_buffer32 = av_malloc_array((fs->width + 6), 3 * MAX_PLANES * |
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sizeof(*fs->sample_buffer32)); |
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✓✗✗✓
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if (!fs->sample_buffer || !fs->sample_buffer32) |
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goto memfail; |
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} |
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f->max_slice_count = max_slice_count; |
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return 0; |
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memfail: |
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f->max_slice_count = i; |
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return AVERROR(ENOMEM); |
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} |
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int ff_ffv1_allocate_initial_states(FFV1Context *f) |
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{ |
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int i; |
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✓✓ |
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for (i = 0; i < f->quant_table_count; i++) { |
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f->initial_states[i] = av_malloc_array(f->context_count[i], |
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sizeof(*f->initial_states[i])); |
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✗✓ |
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if (!f->initial_states[i]) |
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return AVERROR(ENOMEM); |
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memset(f->initial_states[i], 128, |
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f->context_count[i] * sizeof(*f->initial_states[i])); |
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} |
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return 0; |
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} |
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void ff_ffv1_clear_slice_state(FFV1Context *f, FFV1Context *fs) |
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{ |
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int i, j; |
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✓✓ |
3348 |
for (i = 0; i < f->plane_count; i++) { |
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PlaneContext *p = &fs->plane[i]; |
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p->interlace_bit_state[0] = 128; |
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p->interlace_bit_state[1] = 128; |
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✓✓ |
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if (fs->ac != AC_GOLOMB_RICE) { |
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✓✗ |
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if (f->initial_states[p->quant_table_index]) { |
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memcpy(p->state, f->initial_states[p->quant_table_index], |
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CONTEXT_SIZE * p->context_count); |
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} else |
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memset(p->state, 128, CONTEXT_SIZE * p->context_count); |
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} else { |
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✓✓ |
768384 |
for (j = 0; j < p->context_count; j++) { |
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767232 |
p->vlc_state[j].drift = 0; |
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p->vlc_state[j].error_sum = 4; //FFMAX((RANGE + 32)/64, 2); |
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767232 |
p->vlc_state[j].bias = 0; |
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767232 |
p->vlc_state[j].count = 1; |
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} |
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} |
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} |
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} |
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av_cold int ff_ffv1_close(AVCodecContext *avctx) |
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{ |
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FFV1Context *s = avctx->priv_data; |
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int i, j; |
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✓✗ |
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if (s->picture.f) |
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ff_thread_release_buffer(avctx, &s->picture); |
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av_frame_free(&s->picture.f); |
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✓✗ |
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if (s->last_picture.f) |
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ff_thread_release_buffer(avctx, &s->last_picture); |
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av_frame_free(&s->last_picture.f); |
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✓✓ |
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for (j = 0; j < s->max_slice_count; j++) { |
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FFV1Context *fs = s->slice_context[j]; |
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✓✓ |
960 |
for (i = 0; i < s->plane_count; i++) { |
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PlaneContext *p = &fs->plane[i]; |
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av_freep(&p->state); |
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av_freep(&p->vlc_state); |
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} |
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av_freep(&fs->sample_buffer); |
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av_freep(&fs->sample_buffer32); |
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} |
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av_freep(&avctx->stats_out); |
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✓✓ |
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for (j = 0; j < s->quant_table_count; j++) { |
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av_freep(&s->initial_states[j]); |
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✓✓ |
786 |
for (i = 0; i < s->max_slice_count; i++) { |
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FFV1Context *sf = s->slice_context[i]; |
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av_freep(&sf->rc_stat2[j]); |
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} |
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av_freep(&s->rc_stat2[j]); |
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} |
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✓✓ |
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for (i = 0; i < s->max_slice_count; i++) |
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av_freep(&s->slice_context[i]); |
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return 0; |
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} |