FFmpeg coverage

Directory:	../../../ffmpeg/
File:	src/libavcodec/leaddec.c
Date:	2023-12-04 05:51:44

	Total	Coverage
Lines:	127	0.0%
Functions:	6	0.0%
Branches:	87	0.0%

  
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      /*
    
       * LEAD MCMP decoder
    
       *
    
       * Copyright (c) 2023 Peter Ross
    
       *
    
       * This file is part of FFmpeg.
    
       *
    
       * FFmpeg 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.
    
       *
    
       * FFmpeg 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 FFmpeg; if not, write to the Free Software
    
       * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
    
       */
    
      #include "avcodec.h"
    
      #include "blockdsp.h"
    
      #include "codec_internal.h"
    
      #include "copy_block.h"
    
      #include "decode.h"
    
      #include "get_bits.h"
    
      #include "idctdsp.h"
    
      #include "jpegquanttables.h"
    
      #include "jpegtables.h"
    
      #include "leaddata.h"
    
      #include "libavutil/mem_internal.h"
    
      #include "libavutil/thread.h"
    
      #define LUMA_DC_BITS 9
    
      #define CHROMA_DC_BITS 11
    
      #define LUMA_AC_BITS 10
    
      #define CHROMA_AC_BITS 10
    
      static VLC luma_dc_vlc;
    
      static VLC chroma_dc_vlc;
    
      static VLC luma_ac_vlc;
    
      static VLC chroma_ac_vlc;
    
      ✗
      static av_cold void lead_init_static_data(void)
    
      {
    
      ✗
          VLC_INIT_STATIC_FROM_LENGTHS(&luma_dc_vlc, LUMA_DC_BITS, FF_ARRAY_ELEMS(luma_dc_len),
    
                                       luma_dc_len, 1,
    
                                       0, 0, 0,
    
                                       0, 0, 1 << LUMA_DC_BITS);
    
      ✗
          VLC_INIT_STATIC_FROM_LENGTHS(&chroma_dc_vlc, CHROMA_DC_BITS, FF_ARRAY_ELEMS(chroma_dc_len),
    
                                       chroma_dc_len, 1,
    
                                       0, 0, 0,
    
                                       0, 0, 1 << CHROMA_DC_BITS);
    
      ✗
          VLC_INIT_STATIC_FROM_LENGTHS(&luma_ac_vlc, LUMA_AC_BITS, FF_ARRAY_ELEMS(luma_ac_len),
    
                                       luma_ac_len, 1,
    
                                       ff_mjpeg_val_ac_luminance, 1, 1,
    
                                       0, 0, 1160);
    
      ✗
          VLC_INIT_STATIC_FROM_LENGTHS(&chroma_ac_vlc, CHROMA_AC_BITS, FF_ARRAY_ELEMS(chroma_ac_len),
    
                                       chroma_ac_len, 1,
    
                                       ff_mjpeg_val_ac_chrominance, 1, 1,
    
                                       0, 0, 1160);
    
      ✗
      }
    
      typedef struct LeadContext {
    
          uint8_t *bitstream_buf;
    
          unsigned int bitstream_buf_size;
    
          BlockDSPContext bdsp;
    
          IDCTDSPContext idsp;
    
          uint8_t permutated_scantable[64];
    
      } LeadContext;
    
      ✗
      static av_cold int lead_decode_init(AVCodecContext * avctx)
    
      {
    
          static AVOnce init_static_once = AV_ONCE_INIT;
    
      ✗
          LeadContext *s = avctx->priv_data;
    
      ✗
          if (avctx->extradata_size < 20)
    
      ✗
              return AVERROR_INVALIDDATA;
    
      ✗
          ff_blockdsp_init(&s->bdsp);
    
      ✗
          ff_idctdsp_init(&s->idsp, avctx);
    
      ✗
          ff_permute_scantable(s->permutated_scantable, ff_zigzag_direct, s->idsp.idct_permutation);
    
      ✗
          ff_thread_once(&init_static_once, lead_init_static_data);
    
      ✗
          return 0;
    
      }
    
      ✗
      static void calc_dequant(uint16_t * dequant, const uint8_t * quant_tbl, int q)
    
      {
    
      ✗
          for (int i = 0; i < 64; i++)
    
      ✗
              dequant[i] = av_clip(q * quant_tbl[ff_zigzag_direct[i]] / 50, 2, 32767);
    
      ✗
      }
    
      ✗
      static int decode_block(LeadContext * s, GetBitContext * gb,
    
                              const VLCElem * dc_table, int dc_bits, const VLCElem * ac_table, int ac_bits,
    
                              int16_t * dc_pred, const uint16_t * dequant,
    
                              uint8_t * dst, int stride)
    
      {
    
          DECLARE_ALIGNED(32, int16_t, block)[64];
    
          int size;
    
      ✗
          s->bdsp.clear_block(block);
    
      ✗
          size = get_vlc2(gb, dc_table, dc_bits, 1);
    
      ✗
          if (size < 0)
    
      ✗
              return AVERROR_INVALIDDATA;
    
      ✗
          if (size)
    
      ✗
              *dc_pred += get_xbits(gb, size);
    
      ✗
          block[0] = (1 << 10) + *dc_pred * dequant[0];
    
      ✗
          for (int i = 1; i < 64; i++) {
    
      ✗
              int symbol = get_vlc2(gb, ac_table, ac_bits, 2);
    
      ✗
              if (symbol < 0)
    
      ✗
                  return AVERROR_INVALIDDATA;
    
      ✗
              if (!symbol)
    
      ✗
                  break;
    
      ✗
              i += symbol >> 4;
    
      ✗
              if (i >= 64)
    
      ✗
                  return AVERROR_INVALIDDATA;
    
      ✗
              size = symbol & 0xF;
    
      ✗
              if (size)
    
      ✗
                  block[s->permutated_scantable[i]] = get_xbits(gb, size) * dequant[i];
    
          }
    
      ✗
          s->idsp.idct_put(dst, stride, block);
    
      ✗
          return 0;
    
      }
    
      ✗
      static int lead_decode_frame(AVCodecContext *avctx, AVFrame * frame,
    
                                   int * got_frame, AVPacket * avpkt)
    
      {
    
      ✗
          LeadContext *s = avctx->priv_data;
    
      ✗
          const uint8_t * buf = avpkt->data;
    
      ✗
          int ret, format, yuv20p_half = 0, fields = 1, q, size;
    
          GetBitContext gb;
    
      ✗
          int16_t dc_pred[3] = {0, 0, 0};
    
          uint16_t dequant[2][64];
    
      ✗
          if (avpkt->size < 8)
    
      ✗
              return AVERROR_INVALIDDATA;
    
      ✗
          format = AV_RL16(buf + 4);
    
      ✗
          switch(format) {
    
      ✗
          case 0x8000:
    
      ✗
              yuv20p_half = 1;
    
              // fall-through
    
      ✗
          case 0x1000:
    
      ✗
              avctx->pix_fmt = AV_PIX_FMT_YUV420P;
    
      ✗
              break;
    
      ✗
          case 0x2000:
    
      ✗
              avctx->pix_fmt = AV_PIX_FMT_YUV444P;
    
      ✗
              break;
    
      ✗
          case 0x2006:
    
      ✗
              avctx->pix_fmt = AV_PIX_FMT_YUV444P;
    
      ✗
              fields = 2;
    
      ✗
              break;
    
      ✗
          default:
    
      ✗
              avpriv_request_sample(avctx, "unsupported format 0x%x", format);
    
      ✗
              return AVERROR_PATCHWELCOME;
    
          }
    
      ✗
          q = AV_RL16(buf + 6);
    
      ✗
          calc_dequant(dequant[0], ff_mjpeg_std_luminance_quant_tbl, q);
    
      ✗
          calc_dequant(dequant[1], ff_mjpeg_std_chrominance_quant_tbl, q);
    
      ✗
          if ((ret = ff_get_buffer(avctx, frame, 0)) < 0)
    
      ✗
              return ret;
    
      ✗
          frame->flags |= AV_FRAME_FLAG_KEY;
    
      ✗
          frame->pict_type = AV_PICTURE_TYPE_I;
    
      ✗
          av_fast_padded_malloc(&s->bitstream_buf, &s->bitstream_buf_size, avpkt->size - 8);
    
      ✗
          if (!s->bitstream_buf)
    
      ✗
              return AVERROR(ENOMEM);
    
      ✗
          size = 0;
    
      ✗
          for (int i = 8; i < avpkt->size; i++) {
    
      ✗
              int src = buf[i] ^ 0x80;
    
      ✗
              s->bitstream_buf[size++] = src;
    
      ✗
              if (src == 0xFF && i + 1 < avpkt->size && (buf[i + 1] ^ 0x80) == 0x00)
    
      ✗
                  i++;
    
          }
    
      ✗
          init_get_bits8(&gb, s->bitstream_buf, size);
    
      ✗
          if (avctx->pix_fmt == AV_PIX_FMT_YUV420P) {
    
      ✗
              for (int mb_y = 0; mb_y < avctx->height / 16; mb_y++)
    
      ✗
                  for (int mb_x = 0; mb_x < avctx->width / 16; mb_x++)
    
      ✗
                      for (int b = 0; b < (yuv20p_half ? 4 : 6); b++) {
    
      ✗
                          int luma_block = yuv20p_half ? 2 : 4;
    
      ✗
                          const VLCElem * dc_vlc = b < luma_block ? luma_dc_vlc.table : chroma_dc_vlc.table;
    
      ✗
                          int dc_bits            = b < luma_block ? LUMA_DC_BITS : CHROMA_DC_BITS;
    
      ✗
                          const VLCElem * ac_vlc = b < luma_block ? luma_ac_vlc.table : chroma_ac_vlc.table;
    
      ✗
                          int ac_bits            = b < luma_block ? LUMA_AC_BITS : CHROMA_AC_BITS;
    
      ✗
                          int plane              = b < luma_block ? 0 : b - (yuv20p_half ? 1 : 3);
    
                          int x, y;
    
      ✗
                          if (b < luma_block) {
    
      ✗
                              y = 16*mb_y + 8*(b >> 1);
    
      ✗
                              x = 16*mb_x + 8*(b & 1);
    
                          } else {
    
      ✗
                              y = 8*mb_y;
    
      ✗
                              x = 8*mb_x;
    
                          }
    
      ✗
                          ret = decode_block(s, &gb, dc_vlc, dc_bits, ac_vlc, ac_bits,
    
      ✗
                              dc_pred + plane, dequant[!(b < 4)],
    
      ✗
                              frame->data[plane] + y*frame->linesize[plane] + x,
    
      ✗
                              (yuv20p_half && b < 2 ? 2 : 1) * frame->linesize[plane]);
    
      ✗
                          if (ret < 0)
    
      ✗
                              return ret;
    
      ✗
                          if (yuv20p_half && b < 2)
    
      ✗
                              copy_block8(frame->data[plane] + (y + 1)*frame->linesize[plane] + x,
    
      ✗
                                          frame->data[plane] + y*frame->linesize[plane] + x,
    
      ✗
                                          2*frame->linesize[plane], 2*frame->linesize[plane], 8);
    
                      }
    
          } else {
    
      ✗
              for (int f = 0; f < fields; f++)
    
      ✗
                  for (int j = 0; j < avctx->height / fields / 8; j++)
    
      ✗
                      for (int i = 0; i < avctx->width / 8; i++)
    
      ✗
                          for (int plane = 0; plane < 3; plane++) {
    
      ✗
                              const VLCElem * dc_vlc = !plane ? luma_dc_vlc.table : chroma_dc_vlc.table;
    
      ✗
                              int dc_bits            = !plane ? LUMA_DC_BITS : CHROMA_DC_BITS;
    
      ✗
                              const VLCElem * ac_vlc = !plane ? luma_ac_vlc.table : chroma_ac_vlc.table;
    
      ✗
                              int ac_bits            = !plane ? LUMA_AC_BITS : CHROMA_AC_BITS;
    
      ✗
                              ret = decode_block(s, &gb, dc_vlc, dc_bits, ac_vlc, ac_bits,
    
      ✗
                                  dc_pred + plane, dequant[!!plane],
    
      ✗
                                  frame->data[plane] + (f + 8*j*fields)*frame->linesize[plane] + 8*i,
    
      ✗
                                  fields * frame->linesize[plane]);
    
      ✗
                              if (ret < 0)
    
      ✗
                                  return ret;
    
                          }
    
          }
    
      ✗
          *got_frame = 1;
    
      ✗
          return avpkt->size;
    
      }
    
      ✗
      static av_cold int lead_decode_end(AVCodecContext * avctx)
    
      {
    
      ✗
          LeadContext *s = avctx->priv_data;
    
      ✗
          av_freep(&s->bitstream_buf);
    
      ✗
          return 0;
    
      }
    
      const FFCodec ff_lead_decoder = {
    
          .p.name         = "lead",
    
          CODEC_LONG_NAME("LEAD MCMP"),
    
          .p.type         = AVMEDIA_TYPE_VIDEO,
    
          .p.id           = AV_CODEC_ID_LEAD,
    
          .priv_data_size = sizeof(LeadContext),
    
          .init           = lead_decode_init,
    
          .close          = lead_decode_end,
    
          FF_CODEC_DECODE_CB(lead_decode_frame),
    
          .p.capabilities = AV_CODEC_CAP_DR1,
    
          .caps_internal  = FF_CODEC_CAP_INIT_CLEANUP,
    
      };

Line	Exec	Source
1		/*
2		* LEAD MCMP decoder
3		*
4		* Copyright (c) 2023 Peter Ross
5		*
6		* This file is part of FFmpeg.
7		*
8		* FFmpeg is free software; you can redistribute it and/or
9		* modify it under the terms of the GNU Lesser General Public
10		* License as published by the Free Software Foundation; either
11		* version 2.1 of the License, or (at your option) any later version.
12		*
13		* FFmpeg is distributed in the hope that it will be useful,
14		* but WITHOUT ANY WARRANTY; without even the implied warranty of
15		* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16		* Lesser General Public License for more details.
17		*
18		* You should have received a copy of the GNU Lesser General Public
19		* License along with FFmpeg; if not, write to the Free Software
20		* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21		*/
22
23		#include "avcodec.h"
24		#include "blockdsp.h"
25		#include "codec_internal.h"
26		#include "copy_block.h"
27		#include "decode.h"
28		#include "get_bits.h"
29		#include "idctdsp.h"
30		#include "jpegquanttables.h"
31		#include "jpegtables.h"
32		#include "leaddata.h"
33		#include "libavutil/mem_internal.h"
34		#include "libavutil/thread.h"
35
36		#define LUMA_DC_BITS 9
37		#define CHROMA_DC_BITS 11
38		#define LUMA_AC_BITS 10
39		#define CHROMA_AC_BITS 10
40
41		static VLC luma_dc_vlc;
42		static VLC chroma_dc_vlc;
43		static VLC luma_ac_vlc;
44		static VLC chroma_ac_vlc;
45
46	✗	static av_cold void lead_init_static_data(void)
47		{
48	✗	VLC_INIT_STATIC_FROM_LENGTHS(&luma_dc_vlc, LUMA_DC_BITS, FF_ARRAY_ELEMS(luma_dc_len),
49		luma_dc_len, 1,
50		0, 0, 0,
51		0, 0, 1 << LUMA_DC_BITS);
52	✗	VLC_INIT_STATIC_FROM_LENGTHS(&chroma_dc_vlc, CHROMA_DC_BITS, FF_ARRAY_ELEMS(chroma_dc_len),
53		chroma_dc_len, 1,
54		0, 0, 0,
55		0, 0, 1 << CHROMA_DC_BITS);
56	✗	VLC_INIT_STATIC_FROM_LENGTHS(&luma_ac_vlc, LUMA_AC_BITS, FF_ARRAY_ELEMS(luma_ac_len),
57		luma_ac_len, 1,
58		ff_mjpeg_val_ac_luminance, 1, 1,
59		0, 0, 1160);
60	✗	VLC_INIT_STATIC_FROM_LENGTHS(&chroma_ac_vlc, CHROMA_AC_BITS, FF_ARRAY_ELEMS(chroma_ac_len),
61		chroma_ac_len, 1,
62		ff_mjpeg_val_ac_chrominance, 1, 1,
63		0, 0, 1160);
64	✗	}
65
66		typedef struct LeadContext {
67		uint8_t *bitstream_buf;
68		unsigned int bitstream_buf_size;
69		BlockDSPContext bdsp;
70		IDCTDSPContext idsp;
71		uint8_t permutated_scantable[64];
72		} LeadContext;
73
74	✗	static av_cold int lead_decode_init(AVCodecContext * avctx)
75		{
76		static AVOnce init_static_once = AV_ONCE_INIT;
77	✗	LeadContext *s = avctx->priv_data;
78
79	✗	if (avctx->extradata_size < 20)
80	✗	return AVERROR_INVALIDDATA;
81
82	✗	ff_blockdsp_init(&s->bdsp);
83	✗	ff_idctdsp_init(&s->idsp, avctx);
84	✗	ff_permute_scantable(s->permutated_scantable, ff_zigzag_direct, s->idsp.idct_permutation);
85
86	✗	ff_thread_once(&init_static_once, lead_init_static_data);
87
88	✗	return 0;
89		}
90
91	✗	static void calc_dequant(uint16_t * dequant, const uint8_t * quant_tbl, int q)
92		{
93	✗	for (int i = 0; i < 64; i++)
94	✗	dequant[i] = av_clip(q * quant_tbl[ff_zigzag_direct[i]] / 50, 2, 32767);
95	✗	}
96
97	✗	static int decode_block(LeadContext * s, GetBitContext * gb,
98		const VLCElem * dc_table, int dc_bits, const VLCElem * ac_table, int ac_bits,
99		int16_t * dc_pred, const uint16_t * dequant,
100		uint8_t * dst, int stride)
101		{
102		DECLARE_ALIGNED(32, int16_t, block)[64];
103		int size;
104
105	✗	s->bdsp.clear_block(block);
106
107	✗	size = get_vlc2(gb, dc_table, dc_bits, 1);
108	✗	if (size < 0)
109	✗	return AVERROR_INVALIDDATA;
110
111	✗	if (size)
112	✗	*dc_pred += get_xbits(gb, size);
113
114	✗	block[0] = (1 << 10) + dc_pred dequant[0];
115
116	✗	for (int i = 1; i < 64; i++) {
117	✗	int symbol = get_vlc2(gb, ac_table, ac_bits, 2);
118	✗	if (symbol < 0)
119	✗	return AVERROR_INVALIDDATA;
120
121	✗	if (!symbol)
122	✗	break;
123
124	✗	i += symbol >> 4;
125	✗	if (i >= 64)
126	✗	return AVERROR_INVALIDDATA;
127
128	✗	size = symbol & 0xF;
129	✗	if (size)
130	✗	block[s->permutated_scantable[i]] = get_xbits(gb, size) * dequant[i];
131		}
132
133	✗	s->idsp.idct_put(dst, stride, block);
134	✗	return 0;
135		}
136
137	✗	static int lead_decode_frame(AVCodecContext avctx, AVFrame frame,
138		int * got_frame, AVPacket * avpkt)
139		{
140	✗	LeadContext *s = avctx->priv_data;
141	✗	const uint8_t * buf = avpkt->data;
142	✗	int ret, format, yuv20p_half = 0, fields = 1, q, size;
143		GetBitContext gb;
144	✗	int16_t dc_pred[3] = {0, 0, 0};
145		uint16_t dequant[2][64];
146
147	✗	if (avpkt->size < 8)
148	✗	return AVERROR_INVALIDDATA;
149
150	✗	format = AV_RL16(buf + 4);
151	✗	switch(format) {
152	✗	case 0x8000:
153	✗	yuv20p_half = 1;
154		// fall-through
155	✗	case 0x1000:
156	✗	avctx->pix_fmt = AV_PIX_FMT_YUV420P;
157	✗	break;
158	✗	case 0x2000:
159	✗	avctx->pix_fmt = AV_PIX_FMT_YUV444P;
160	✗	break;
161	✗	case 0x2006:
162	✗	avctx->pix_fmt = AV_PIX_FMT_YUV444P;
163	✗	fields = 2;
164	✗	break;
165	✗	default:
166	✗	avpriv_request_sample(avctx, "unsupported format 0x%x", format);
167	✗	return AVERROR_PATCHWELCOME;
168		}
169
170	✗	q = AV_RL16(buf + 6);
171	✗	calc_dequant(dequant[0], ff_mjpeg_std_luminance_quant_tbl, q);
172	✗	calc_dequant(dequant[1], ff_mjpeg_std_chrominance_quant_tbl, q);
173
174	✗	if ((ret = ff_get_buffer(avctx, frame, 0)) < 0)
175	✗	return ret;
176
177	✗	frame->flags \|= AV_FRAME_FLAG_KEY;
178	✗	frame->pict_type = AV_PICTURE_TYPE_I;
179
180	✗	av_fast_padded_malloc(&s->bitstream_buf, &s->bitstream_buf_size, avpkt->size - 8);
181	✗	if (!s->bitstream_buf)
182	✗	return AVERROR(ENOMEM);
183
184	✗	size = 0;
185	✗	for (int i = 8; i < avpkt->size; i++) {
186	✗	int src = buf[i] ^ 0x80;
187	✗	s->bitstream_buf[size++] = src;
188	✗	if (src == 0xFF && i + 1 < avpkt->size && (buf[i + 1] ^ 0x80) == 0x00)
189	✗	i++;
190		}
191
192	✗	init_get_bits8(&gb, s->bitstream_buf, size);
193
194	✗	if (avctx->pix_fmt == AV_PIX_FMT_YUV420P) {
195	✗	for (int mb_y = 0; mb_y < avctx->height / 16; mb_y++)
196	✗	for (int mb_x = 0; mb_x < avctx->width / 16; mb_x++)
197	✗	for (int b = 0; b < (yuv20p_half ? 4 : 6); b++) {
198	✗	int luma_block = yuv20p_half ? 2 : 4;
199	✗	const VLCElem * dc_vlc = b < luma_block ? luma_dc_vlc.table : chroma_dc_vlc.table;
200	✗	int dc_bits = b < luma_block ? LUMA_DC_BITS : CHROMA_DC_BITS;
201	✗	const VLCElem * ac_vlc = b < luma_block ? luma_ac_vlc.table : chroma_ac_vlc.table;
202	✗	int ac_bits = b < luma_block ? LUMA_AC_BITS : CHROMA_AC_BITS;
203	✗	int plane = b < luma_block ? 0 : b - (yuv20p_half ? 1 : 3);
204		int x, y;
205
206	✗	if (b < luma_block) {
207	✗	y = 16mb_y + 8(b >> 1);
208	✗	x = 16mb_x + 8(b & 1);
209		} else {
210	✗	y = 8*mb_y;
211	✗	x = 8*mb_x;
212		}
213
214	✗	ret = decode_block(s, &gb, dc_vlc, dc_bits, ac_vlc, ac_bits,
215	✗	dc_pred + plane, dequant[!(b < 4)],
216	✗	frame->data[plane] + y*frame->linesize[plane] + x,
217	✗	(yuv20p_half && b < 2 ? 2 : 1) * frame->linesize[plane]);
218	✗	if (ret < 0)
219	✗	return ret;
220
221	✗	if (yuv20p_half && b < 2)
222	✗	copy_block8(frame->data[plane] + (y + 1)*frame->linesize[plane] + x,
223	✗	frame->data[plane] + y*frame->linesize[plane] + x,
224	✗	2frame->linesize[plane], 2frame->linesize[plane], 8);
225		}
226		} else {
227	✗	for (int f = 0; f < fields; f++)
228	✗	for (int j = 0; j < avctx->height / fields / 8; j++)
229	✗	for (int i = 0; i < avctx->width / 8; i++)
230	✗	for (int plane = 0; plane < 3; plane++) {
231	✗	const VLCElem * dc_vlc = !plane ? luma_dc_vlc.table : chroma_dc_vlc.table;
232	✗	int dc_bits = !plane ? LUMA_DC_BITS : CHROMA_DC_BITS;
233	✗	const VLCElem * ac_vlc = !plane ? luma_ac_vlc.table : chroma_ac_vlc.table;
234	✗	int ac_bits = !plane ? LUMA_AC_BITS : CHROMA_AC_BITS;
235
236	✗	ret = decode_block(s, &gb, dc_vlc, dc_bits, ac_vlc, ac_bits,
237	✗	dc_pred + plane, dequant[!!plane],
238	✗	frame->data[plane] + (f + 8jfields)frame->linesize[plane] + 8i,
239	✗	fields * frame->linesize[plane]);
240	✗	if (ret < 0)
241	✗	return ret;
242		}
243		}
244
245	✗	*got_frame = 1;
246
247	✗	return avpkt->size;
248		}
249
250	✗	static av_cold int lead_decode_end(AVCodecContext * avctx)
251		{
252	✗	LeadContext *s = avctx->priv_data;
253
254	✗	av_freep(&s->bitstream_buf);
255
256	✗	return 0;
257		}
258
259		const FFCodec ff_lead_decoder = {
260		.p.name = "lead",
261		CODEC_LONG_NAME("LEAD MCMP"),
262		.p.type = AVMEDIA_TYPE_VIDEO,
263		.p.id = AV_CODEC_ID_LEAD,
264		.priv_data_size = sizeof(LeadContext),
265		.init = lead_decode_init,
266		.close = lead_decode_end,
267		FF_CODEC_DECODE_CB(lead_decode_frame),
268		.p.capabilities = AV_CODEC_CAP_DR1,
269		.caps_internal = FF_CODEC_CAP_INIT_CLEANUP,
270		};
271