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Directory:	../../../ffmpeg/
File:	src/libavcodec/mvcdec.c
Date:	2025-08-04 00:43:16

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Lines:	101	119	84.9%
Functions:	5	5	100.0%
Branches:	140	160	87.5%

  
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      /*
    
       * Silicon Graphics Motion Video Compressor 1 & 2 decoder
    
       * Copyright (c) 2012 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
    
       */
    
      /**
    
       * @file
    
       * Silicon Graphics Motion Video Compressor 1 & 2 decoder
    
       */
    
      #include "config_components.h"
    
      #include "libavutil/intreadwrite.h"
    
      #include "avcodec.h"
    
      #include "bytestream.h"
    
      #include "codec_internal.h"
    
      #include "decode.h"
    
      typedef struct MvcContext {
    
          int vflip;
    
      } MvcContext;
    
      4
      static av_cold int mvc_decode_init(AVCodecContext *avctx)
    
      {
    
      4
          MvcContext *s = avctx->priv_data;
    
      4
          int width     = avctx->width;
    
      4
          int height    = avctx->height;
    
          int ret;
    
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      4
          if (avctx->codec_id == AV_CODEC_ID_MVC1) {
    
      2
              width  += 3;
    
      2
              height += 3;
    
          }
    
      4
          width  &= ~3;
    
      4
          height &= ~3;
    
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      4
          if ((ret = ff_set_dimensions(avctx, width, height)) < 0)
    
      ✗
              return ret;
    
      8
          avctx->pix_fmt = (avctx->codec_id == AV_CODEC_ID_MVC1) ? AV_PIX_FMT_RGB555
    
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      4
                                                                 : AV_PIX_FMT_RGB32;
    
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      8
          s->vflip = avctx->extradata_size >= 9 &&
    
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      4
                     !memcmp(avctx->extradata + avctx->extradata_size - 9, "BottomUp", 9);
    
      4
          return 0;
    
      }
    
      28
      static int decode_mvc1(AVCodecContext *avctx, GetByteContext *gb,
    
                             uint8_t *dst_start, int width, int height, int linesize)
    
      {
    
          uint8_t *dst;
    
          uint16_t v[8];
    
          int mask, x, y, i;
    
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      2044
          for (y = 0; y < height; y += 4) {
    
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              for (x = 0; x < width; x += 4) {
    
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      193536
                  if (bytestream2_get_bytes_left(gb) < 6)
    
      ✗
                      return 0;
    
      193536
                  mask = bytestream2_get_be16u(gb);
    
      193536
                  v[0] = bytestream2_get_be16u(gb);
    
      193536
                  v[1] = bytestream2_get_be16u(gb);
    
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      193536
                  if ((v[0] & 0x8000)) {
    
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      35749
                      if (bytestream2_get_bytes_left(gb) < 12) {
    
      ✗
                          av_log(avctx, AV_LOG_WARNING, "buffer overflow\n");
    
      ✗
                          return AVERROR_INVALIDDATA;
    
                      }
    
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      250243
                      for (i = 2; i < 8; i++)
    
      214494
                          v[i] = bytestream2_get_be16u(gb);
    
                  } else {
    
      157787
                      v[2] = v[4] = v[6] = v[0];
    
      157787
                      v[3] = v[5] = v[7] = v[1];
    
                  }
    
      #define PIX16(target, true, false)                                            \
    
          i = (mask & target) ? true : false;                                       \
    
          AV_WN16A(dst, v[i] & 0x7FFF);                                             \
    
          dst += 2;
    
      #define ROW16(row, a1, a0, b1, b0)                                            \
    
          dst = dst_start + (y + row) * linesize + x * 2;                           \
    
          PIX16(1 << (row * 4), a1, a0)                                             \
    
          PIX16(1 << (row * 4 + 1), a1, a0)                                         \
    
          PIX16(1 << (row * 4 + 2), b1, b0)                                         \
    
          PIX16(1 << (row * 4 + 3), b1, b0)
    
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      193536
                  ROW16(0, 0, 1, 2, 3);
    
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      193536
                  ROW16(1, 0, 1, 2, 3);
    
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      193536
                  ROW16(2, 4, 5, 6, 7);
    
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      193536
                  ROW16(3, 4, 5, 6, 7);
    
              }
    
          }
    
      28
          return 0;
    
      }
    
      45612
      static void set_4x4_block(uint8_t *dst, int linesize, uint32_t pixel)
    
      {
    
          int i, j;
    
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          for (j = 0; j < 4; j++)
    
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      912240
              for (i = 0; i < 4; i++)
    
      729792
                  AV_WN32A(dst + j * linesize + i * 4, pixel);
    
      45612
      }
    
      #define PIX32(target, true, false)                                            \
    
          AV_WN32A(dst, (mask & target) ? v[true] : v[false]);                      \
    
          dst += 4;
    
      #define ROW32(row, a1, a0, b1, b0)                                            \
    
          dst = dst_start + (y + row) * linesize + x * 4;                           \
    
          PIX32(1 << (row * 4), a1, a0)                                             \
    
          PIX32(1 << (row * 4 + 1), a1, a0)                                         \
    
          PIX32(1 << (row * 4 + 2), b1, b0)                                         \
    
          PIX32(1 << (row * 4 + 3), b1, b0)
    
      #define MVC2_BLOCK                                                            \
    
          ROW32(0, 1, 0, 3, 2);                                                     \
    
          ROW32(1, 1, 0, 3, 2);                                                     \
    
          ROW32(2, 5, 4, 7, 6);                                                     \
    
          ROW32(3, 5, 4, 7, 6);
    
      32
      static int decode_mvc2(AVCodecContext *avctx, GetByteContext *gb,
    
                             uint8_t *dst_start, int width, int height,
    
                             int linesize, int vflip)
    
      {
    
          uint8_t *dst;
    
          uint32_t color[128], v[8];
    
          int w, h, nb_colors, i, x, y, p0, p1, mask;
    
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      32
          if (bytestream2_get_bytes_left(gb) < 6)
    
      ✗
              return AVERROR_INVALIDDATA;
    
      32
          w = bytestream2_get_be16u(gb);
    
      32
          h = bytestream2_get_be16u(gb);
    
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      32
          if ((w & ~3) != width || (h & ~3) != height)
    
      ✗
              av_log(avctx, AV_LOG_WARNING, "dimension mismatch\n");
    
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      32
          if (bytestream2_get_byteu(gb)) {
    
      ✗
              avpriv_request_sample(avctx, "bitmap feature");
    
      ✗
              return AVERROR_PATCHWELCOME;
    
          }
    
      32
          nb_colors = bytestream2_get_byteu(gb);
    
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      32
          if (bytestream2_get_bytes_left(gb) < nb_colors * 3)
    
      ✗
              return AVERROR_INVALIDDATA;
    
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      4125
          for (i = 0; i < FFMIN(nb_colors, 128); i++)
    
      4093
              color[i] = 0xFF000000 | bytestream2_get_be24u(gb);
    
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      32
          if (nb_colors > 128)
    
      ✗
              bytestream2_skip(gb, (nb_colors - 128) * 3);
    
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      32
          if (vflip) {
    
      32
              dst_start += (height - 1) * linesize;
    
      32
              linesize   = -linesize;
    
          }
    
      32
          x = y = 0;
    
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      63168
          while (bytestream2_get_bytes_left(gb) >= 1) {
    
      63168
              p0 = bytestream2_get_byteu(gb);
    
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      63168
              if ((p0 & 0x80)) {
    
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      45612
                  if ((p0 & 0x40)) {
    
      1290
                      p0 &= 0x3F;
    
      1290
                      p0  = (p0 << 2) | (p0 >> 4);
    
      1290
                      set_4x4_block(dst_start + y * linesize + x * 4, linesize,
    
      1290
                                    0xFF000000 | (p0 << 16) | (p0 << 8) | p0);
    
                  } else {
    
                      int g, r;
    
      44322
                      p0 &= 0x3F;
    
      44322
                      p0  = (p0 << 2) | (p0 >> 4);
    
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      44322
                      if (bytestream2_get_bytes_left(gb) < 2)
    
      ✗
                          return AVERROR_INVALIDDATA;
    
      44322
                      g = bytestream2_get_byteu(gb);
    
      44322
                      r = bytestream2_get_byteu(gb);
    
      44322
                      set_4x4_block(dst_start + y * linesize + x * 4, linesize,
    
      44322
                                    0xFF000000 | (r << 16) | (g << 8) | p0);
    
                  }
    
              } else {
    
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      17556
                  if (bytestream2_get_bytes_left(gb) < 1)
    
      ✗
                      return AVERROR_INVALIDDATA;
    
      17556
                  p1 = bytestream2_get_byteu(gb);
    
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      17556
                  if ((p1 & 0x80)) {
    
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      3087
                      if ((p0 & 0x7F) == (p1 & 0x7F)) {
    
      ✗
                          set_4x4_block(dst_start + y * linesize + x * 4, linesize,
    
      ✗
                                        color[p0 & 0x7F]);
    
                      } else {
    
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      3087
                          if (bytestream2_get_bytes_left(gb) < 2)
    
      ✗
                              return AVERROR_INVALIDDATA;
    
      3087
                          v[0] = v[2] = v[4] = v[6] = color[p0 & 0x7F];
    
      3087
                          v[1] = v[3] = v[5] = v[7] = color[p1 & 0x7F];
    
      3087
                          mask = bytestream2_get_le16u(gb);
    
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      3087
                          MVC2_BLOCK
    
                      }
    
                  } else {
    
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      14469
                      if (bytestream2_get_bytes_left(gb) < 8)
    
      ✗
                          return AVERROR_INVALIDDATA;
    
      14469
                      v[0] = color[p0 & 0x7F];
    
      14469
                      v[1] = color[p1 & 0x7F];
    
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      101283
                      for (i = 2; i < 8; i++)
    
      86814
                          v[i] = color[bytestream2_get_byteu(gb) & 0x7F];
    
      14469
                      mask = bytestream2_get_le16u(gb);
    
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      14469
                      MVC2_BLOCK
    
                  }
    
              }
    
      63168
              x += 4;
    
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      63168
              if (x >= width) {
    
      1504
                  y += 4;
    
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      1504
                  if (y >= height)
    
      32
                      break;
    
      1472
                  x = 0;
    
              }
    
          }
    
      32
          return 0;
    
      }
    
      60
      static int mvc_decode_frame(AVCodecContext *avctx, AVFrame *frame,
    
                                  int *got_frame, AVPacket *avpkt)
    
      {
    
      60
          MvcContext *s = avctx->priv_data;
    
          GetByteContext gb;
    
          int ret;
    
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      60
          if ((ret = ff_get_buffer(avctx, frame, 0)) < 0)
    
      ✗
              return ret;
    
      60
          bytestream2_init(&gb, avpkt->data, avpkt->size);
    
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      60
          if (avctx->codec_id == AV_CODEC_ID_MVC1)
    
      28
              ret = decode_mvc1(avctx, &gb, frame->data[0],
    
                                avctx->width, avctx->height, frame->linesize[0]);
    
          else
    
      32
              ret = decode_mvc2(avctx, &gb, frame->data[0],
    
                                avctx->width, avctx->height, frame->linesize[0],
    
                                s->vflip);
    
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      60
          if (ret < 0)
    
      ✗
              return ret;
    
      60
          *got_frame = 1;
    
      60
          return avpkt->size;
    
      }
    
      #if CONFIG_MVC1_DECODER
    
      const FFCodec ff_mvc1_decoder = {
    
          .p.name         = "mvc1",
    
          CODEC_LONG_NAME("Silicon Graphics Motion Video Compressor 1"),
    
          .p.type         = AVMEDIA_TYPE_VIDEO,
    
          .p.id           = AV_CODEC_ID_MVC1,
    
          .priv_data_size = sizeof(MvcContext),
    
          .init           = mvc_decode_init,
    
          FF_CODEC_DECODE_CB(mvc_decode_frame),
    
          .p.capabilities = AV_CODEC_CAP_DR1,
    
      };
    
      #endif
    
      #if CONFIG_MVC2_DECODER
    
      const FFCodec ff_mvc2_decoder = {
    
          .p.name         = "mvc2",
    
          CODEC_LONG_NAME("Silicon Graphics Motion Video Compressor 2"),
    
          .p.type         = AVMEDIA_TYPE_VIDEO,
    
          .p.id           = AV_CODEC_ID_MVC2,
    
          .priv_data_size = sizeof(MvcContext),
    
          .init           = mvc_decode_init,
    
          FF_CODEC_DECODE_CB(mvc_decode_frame),
    
          .p.capabilities = AV_CODEC_CAP_DR1,
    
      };
    
      #endif

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Line	Branch	Exec	Source
1			/*
2			* Silicon Graphics Motion Video Compressor 1 & 2 decoder
3			* Copyright (c) 2012 Peter Ross
4			*
5			* This file is part of FFmpeg.
6			*
7			* FFmpeg is free software; you can redistribute it and/or
8			* modify it under the terms of the GNU Lesser General Public
9			* License as published by the Free Software Foundation; either
10			* version 2.1 of the License, or (at your option) any later version.
11			*
12			* FFmpeg is distributed in the hope that it will be useful,
13			* but WITHOUT ANY WARRANTY; without even the implied warranty of
14			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15			* Lesser General Public License for more details.
16			*
17			* You should have received a copy of the GNU Lesser General Public
18			* License along with FFmpeg; if not, write to the Free Software
19			* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20			*/
21
22			/**
23			* @file
24			* Silicon Graphics Motion Video Compressor 1 & 2 decoder
25			*/
26
27			#include "config_components.h"
28
29			#include "libavutil/intreadwrite.h"
30
31			#include "avcodec.h"
32			#include "bytestream.h"
33			#include "codec_internal.h"
34			#include "decode.h"
35
36			typedef struct MvcContext {
37			int vflip;
38			} MvcContext;
39
40		4	static av_cold int mvc_decode_init(AVCodecContext *avctx)
41			{
42		4	MvcContext *s = avctx->priv_data;
43		4	int width = avctx->width;
44		4	int height = avctx->height;
45			int ret;
46
47	2/2 ✓ Branch 0 taken 2 times. ✓ Branch 1 taken 2 times.	4	if (avctx->codec_id == AV_CODEC_ID_MVC1) {
48		2	width += 3;
49		2	height += 3;
50			}
51		4	width &= ~3;
52		4	height &= ~3;
53	1/2 ✗ Branch 1 not taken. ✓ Branch 2 taken 4 times.	4	if ((ret = ff_set_dimensions(avctx, width, height)) < 0)
54		✗	return ret;
55
56		8	avctx->pix_fmt = (avctx->codec_id == AV_CODEC_ID_MVC1) ? AV_PIX_FMT_RGB555
57	2/2 ✓ Branch 0 taken 2 times. ✓ Branch 1 taken 2 times.	4	: AV_PIX_FMT_RGB32;
58	1/2 ✓ Branch 0 taken 4 times. ✗ Branch 1 not taken.	8	s->vflip = avctx->extradata_size >= 9 &&
59	1/2 ✓ Branch 0 taken 4 times. ✗ Branch 1 not taken.	4	!memcmp(avctx->extradata + avctx->extradata_size - 9, "BottomUp", 9);
60		4	return 0;
61			}
62
63		28	static int decode_mvc1(AVCodecContext avctx, GetByteContext gb,
64			uint8_t *dst_start, int width, int height, int linesize)
65			{
66			uint8_t *dst;
67			uint16_t v[8];
68			int mask, x, y, i;
69
70	2/2 ✓ Branch 0 taken 2016 times. ✓ Branch 1 taken 28 times.	2044	for (y = 0; y < height; y += 4) {
71	2/2 ✓ Branch 0 taken 193536 times. ✓ Branch 1 taken 2016 times.	195552	for (x = 0; x < width; x += 4) {
72	1/2 ✗ Branch 1 not taken. ✓ Branch 2 taken 193536 times.	193536	if (bytestream2_get_bytes_left(gb) < 6)
73		✗	return 0;
74
75		193536	mask = bytestream2_get_be16u(gb);
76		193536	v[0] = bytestream2_get_be16u(gb);
77		193536	v[1] = bytestream2_get_be16u(gb);
78	2/2 ✓ Branch 0 taken 35749 times. ✓ Branch 1 taken 157787 times.	193536	if ((v[0] & 0x8000)) {
79	1/2 ✗ Branch 1 not taken. ✓ Branch 2 taken 35749 times.	35749	if (bytestream2_get_bytes_left(gb) < 12) {
80		✗	av_log(avctx, AV_LOG_WARNING, "buffer overflow\n");
81		✗	return AVERROR_INVALIDDATA;
82			}
83	2/2 ✓ Branch 0 taken 214494 times. ✓ Branch 1 taken 35749 times.	250243	for (i = 2; i < 8; i++)
84		214494	v[i] = bytestream2_get_be16u(gb);
85			} else {
86		157787	v[2] = v[4] = v[6] = v[0];
87		157787	v[3] = v[5] = v[7] = v[1];
88			}
89
90			#define PIX16(target, true, false) \
91			i = (mask & target) ? true : false; \
92			AV_WN16A(dst, v[i] & 0x7FFF); \
93			dst += 2;
94
95			#define ROW16(row, a1, a0, b1, b0) \
96			dst = dst_start + (y + row) * linesize + x * 2; \
97			PIX16(1 << (row * 4), a1, a0) \
98			PIX16(1 << (row * 4 + 1), a1, a0) \
99			PIX16(1 << (row * 4 + 2), b1, b0) \
100			PIX16(1 << (row * 4 + 3), b1, b0)
101
102	4/4 ✓ Branch 0 taken 104958 times. ✓ Branch 1 taken 88578 times. ✓ Branch 2 taken 104746 times. ✓ Branch 3 taken 88790 times.	193536	ROW16(0, 0, 1, 2, 3);
103	4/4 ✓ Branch 0 taken 101604 times. ✓ Branch 1 taken 91932 times. ✓ Branch 2 taken 100965 times. ✓ Branch 3 taken 92571 times.	193536	ROW16(1, 0, 1, 2, 3);
104	8/8 ✓ Branch 0 taken 103317 times. ✓ Branch 1 taken 90219 times. ✓ Branch 2 taken 105128 times. ✓ Branch 3 taken 88408 times. ✓ Branch 4 taken 105316 times. ✓ Branch 5 taken 88220 times. ✓ Branch 6 taken 105104 times. ✓ Branch 7 taken 88432 times.	193536	ROW16(2, 4, 5, 6, 7);
105	8/8 ✓ Branch 0 taken 96671 times. ✓ Branch 1 taken 96865 times. ✓ Branch 2 taken 97605 times. ✓ Branch 3 taken 95931 times. ✓ Branch 4 taken 97659 times. ✓ Branch 5 taken 95877 times. ✓ Branch 6 taken 97511 times. ✓ Branch 7 taken 96025 times.	193536	ROW16(3, 4, 5, 6, 7);
106			}
107			}
108		28	return 0;
109			}
110
111		45612	static void set_4x4_block(uint8_t *dst, int linesize, uint32_t pixel)
112			{
113			int i, j;
114	2/2 ✓ Branch 0 taken 182448 times. ✓ Branch 1 taken 45612 times.	228060	for (j = 0; j < 4; j++)
115	2/2 ✓ Branch 0 taken 729792 times. ✓ Branch 1 taken 182448 times.	912240	for (i = 0; i < 4; i++)
116		729792	AV_WN32A(dst + j * linesize + i * 4, pixel);
117		45612	}
118
119			#define PIX32(target, true, false) \
120			AV_WN32A(dst, (mask & target) ? v[true] : v[false]); \
121			dst += 4;
122
123			#define ROW32(row, a1, a0, b1, b0) \
124			dst = dst_start + (y + row) * linesize + x * 4; \
125			PIX32(1 << (row * 4), a1, a0) \
126			PIX32(1 << (row * 4 + 1), a1, a0) \
127			PIX32(1 << (row * 4 + 2), b1, b0) \
128			PIX32(1 << (row * 4 + 3), b1, b0)
129
130			#define MVC2_BLOCK \
131			ROW32(0, 1, 0, 3, 2); \
132			ROW32(1, 1, 0, 3, 2); \
133			ROW32(2, 5, 4, 7, 6); \
134			ROW32(3, 5, 4, 7, 6);
135
136		32	static int decode_mvc2(AVCodecContext avctx, GetByteContext gb,
137			uint8_t *dst_start, int width, int height,
138			int linesize, int vflip)
139			{
140			uint8_t *dst;
141			uint32_t color[128], v[8];
142			int w, h, nb_colors, i, x, y, p0, p1, mask;
143
144	1/2 ✗ Branch 1 not taken. ✓ Branch 2 taken 32 times.	32	if (bytestream2_get_bytes_left(gb) < 6)
145		✗	return AVERROR_INVALIDDATA;
146
147		32	w = bytestream2_get_be16u(gb);
148		32	h = bytestream2_get_be16u(gb);
149	2/4 ✓ Branch 0 taken 32 times. ✗ Branch 1 not taken. ✗ Branch 2 not taken. ✓ Branch 3 taken 32 times.	32	if ((w & ~3) != width \|\| (h & ~3) != height)
150		✗	av_log(avctx, AV_LOG_WARNING, "dimension mismatch\n");
151
152	1/2 ✗ Branch 1 not taken. ✓ Branch 2 taken 32 times.	32	if (bytestream2_get_byteu(gb)) {
153		✗	avpriv_request_sample(avctx, "bitmap feature");
154		✗	return AVERROR_PATCHWELCOME;
155			}
156
157		32	nb_colors = bytestream2_get_byteu(gb);
158	1/2 ✗ Branch 1 not taken. ✓ Branch 2 taken 32 times.	32	if (bytestream2_get_bytes_left(gb) < nb_colors * 3)
159		✗	return AVERROR_INVALIDDATA;
160	2/2 ✓ Branch 0 taken 4093 times. ✓ Branch 1 taken 32 times.	4125	for (i = 0; i < FFMIN(nb_colors, 128); i++)
161		4093	color[i] = 0xFF000000 \| bytestream2_get_be24u(gb);
162	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 32 times.	32	if (nb_colors > 128)
163		✗	bytestream2_skip(gb, (nb_colors - 128) * 3);
164
165	1/2 ✓ Branch 0 taken 32 times. ✗ Branch 1 not taken.	32	if (vflip) {
166		32	dst_start += (height - 1) * linesize;
167		32	linesize = -linesize;
168			}
169		32	x = y = 0;
170	1/2 ✓ Branch 1 taken 63168 times. ✗ Branch 2 not taken.	63168	while (bytestream2_get_bytes_left(gb) >= 1) {
171		63168	p0 = bytestream2_get_byteu(gb);
172	2/2 ✓ Branch 0 taken 45612 times. ✓ Branch 1 taken 17556 times.	63168	if ((p0 & 0x80)) {
173	2/2 ✓ Branch 0 taken 1290 times. ✓ Branch 1 taken 44322 times.	45612	if ((p0 & 0x40)) {
174		1290	p0 &= 0x3F;
175		1290	p0 = (p0 << 2) \| (p0 >> 4);
176		1290	set_4x4_block(dst_start + y * linesize + x * 4, linesize,
177		1290	0xFF000000 \| (p0 << 16) \| (p0 << 8) \| p0);
178			} else {
179			int g, r;
180		44322	p0 &= 0x3F;
181		44322	p0 = (p0 << 2) \| (p0 >> 4);
182	1/2 ✗ Branch 1 not taken. ✓ Branch 2 taken 44322 times.	44322	if (bytestream2_get_bytes_left(gb) < 2)
183		✗	return AVERROR_INVALIDDATA;
184		44322	g = bytestream2_get_byteu(gb);
185		44322	r = bytestream2_get_byteu(gb);
186		44322	set_4x4_block(dst_start + y * linesize + x * 4, linesize,
187		44322	0xFF000000 \| (r << 16) \| (g << 8) \| p0);
188			}
189			} else {
190	1/2 ✗ Branch 1 not taken. ✓ Branch 2 taken 17556 times.	17556	if (bytestream2_get_bytes_left(gb) < 1)
191		✗	return AVERROR_INVALIDDATA;
192		17556	p1 = bytestream2_get_byteu(gb);
193	2/2 ✓ Branch 0 taken 3087 times. ✓ Branch 1 taken 14469 times.	17556	if ((p1 & 0x80)) {
194	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 3087 times.	3087	if ((p0 & 0x7F) == (p1 & 0x7F)) {
195		✗	set_4x4_block(dst_start + y * linesize + x * 4, linesize,
196		✗	color[p0 & 0x7F]);
197			} else {
198	1/2 ✗ Branch 1 not taken. ✓ Branch 2 taken 3087 times.	3087	if (bytestream2_get_bytes_left(gb) < 2)
199		✗	return AVERROR_INVALIDDATA;
200		3087	v[0] = v[2] = v[4] = v[6] = color[p0 & 0x7F];
201		3087	v[1] = v[3] = v[5] = v[7] = color[p1 & 0x7F];
202		3087	mask = bytestream2_get_le16u(gb);
203	32/32 ✓ Branch 0 taken 1546 times. ✓ Branch 1 taken 1541 times. ✓ Branch 2 taken 1562 times. ✓ Branch 3 taken 1525 times. ✓ Branch 4 taken 1593 times. ✓ Branch 5 taken 1494 times. ✓ Branch 6 taken 1592 times. ✓ Branch 7 taken 1495 times. ✓ Branch 8 taken 1603 times. ✓ Branch 9 taken 1484 times. ✓ Branch 10 taken 1575 times. ✓ Branch 11 taken 1512 times. ✓ Branch 12 taken 1591 times. ✓ Branch 13 taken 1496 times. ✓ Branch 14 taken 1730 times. ✓ Branch 15 taken 1357 times. ✓ Branch 16 taken 1543 times. ✓ Branch 17 taken 1544 times. ✓ Branch 18 taken 1573 times. ✓ Branch 19 taken 1514 times. ✓ Branch 20 taken 1555 times. ✓ Branch 21 taken 1532 times. ✓ Branch 22 taken 1631 times. ✓ Branch 23 taken 1456 times. ✓ Branch 24 taken 1613 times. ✓ Branch 25 taken 1474 times. ✓ Branch 26 taken 1653 times. ✓ Branch 27 taken 1434 times. ✓ Branch 28 taken 1624 times. ✓ Branch 29 taken 1463 times. ✓ Branch 30 taken 1645 times. ✓ Branch 31 taken 1442 times.	3087	MVC2_BLOCK
204			}
205			} else {
206	1/2 ✗ Branch 1 not taken. ✓ Branch 2 taken 14469 times.	14469	if (bytestream2_get_bytes_left(gb) < 8)
207		✗	return AVERROR_INVALIDDATA;
208		14469	v[0] = color[p0 & 0x7F];
209		14469	v[1] = color[p1 & 0x7F];
210	2/2 ✓ Branch 0 taken 86814 times. ✓ Branch 1 taken 14469 times.	101283	for (i = 2; i < 8; i++)
211		86814	v[i] = color[bytestream2_get_byteu(gb) & 0x7F];
212		14469	mask = bytestream2_get_le16u(gb);
213	32/32 ✓ Branch 0 taken 6171 times. ✓ Branch 1 taken 8298 times. ✓ Branch 2 taken 5659 times. ✓ Branch 3 taken 8810 times. ✓ Branch 4 taken 5487 times. ✓ Branch 5 taken 8982 times. ✓ Branch 6 taken 5866 times. ✓ Branch 7 taken 8603 times. ✓ Branch 8 taken 6339 times. ✓ Branch 9 taken 8130 times. ✓ Branch 10 taken 5669 times. ✓ Branch 11 taken 8800 times. ✓ Branch 12 taken 5672 times. ✓ Branch 13 taken 8797 times. ✓ Branch 14 taken 5986 times. ✓ Branch 15 taken 8483 times. ✓ Branch 16 taken 5649 times. ✓ Branch 17 taken 8820 times. ✓ Branch 18 taken 5190 times. ✓ Branch 19 taken 9279 times. ✓ Branch 20 taken 5185 times. ✓ Branch 21 taken 9284 times. ✓ Branch 22 taken 5713 times. ✓ Branch 23 taken 8756 times. ✓ Branch 24 taken 6504 times. ✓ Branch 25 taken 7965 times. ✓ Branch 26 taken 5848 times. ✓ Branch 27 taken 8621 times. ✓ Branch 28 taken 5877 times. ✓ Branch 29 taken 8592 times. ✓ Branch 30 taken 6116 times. ✓ Branch 31 taken 8353 times.	14469	MVC2_BLOCK
214			}
215			}
216
217		63168	x += 4;
218	2/2 ✓ Branch 0 taken 1504 times. ✓ Branch 1 taken 61664 times.	63168	if (x >= width) {
219		1504	y += 4;
220	2/2 ✓ Branch 0 taken 32 times. ✓ Branch 1 taken 1472 times.	1504	if (y >= height)
221		32	break;
222		1472	x = 0;
223			}
224			}
225		32	return 0;
226			}
227
228		60	static int mvc_decode_frame(AVCodecContext avctx, AVFrame frame,
229			int got_frame, AVPacket avpkt)
230			{
231		60	MvcContext *s = avctx->priv_data;
232			GetByteContext gb;
233			int ret;
234
235	1/2 ✗ Branch 1 not taken. ✓ Branch 2 taken 60 times.	60	if ((ret = ff_get_buffer(avctx, frame, 0)) < 0)
236		✗	return ret;
237
238		60	bytestream2_init(&gb, avpkt->data, avpkt->size);
239	2/2 ✓ Branch 0 taken 28 times. ✓ Branch 1 taken 32 times.	60	if (avctx->codec_id == AV_CODEC_ID_MVC1)
240		28	ret = decode_mvc1(avctx, &gb, frame->data[0],
241			avctx->width, avctx->height, frame->linesize[0]);
242			else
243		32	ret = decode_mvc2(avctx, &gb, frame->data[0],
244			avctx->width, avctx->height, frame->linesize[0],
245			s->vflip);
246	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 60 times.	60	if (ret < 0)
247		✗	return ret;
248
249		60	*got_frame = 1;
250
251		60	return avpkt->size;
252			}
253
254			#if CONFIG_MVC1_DECODER
255			const FFCodec ff_mvc1_decoder = {
256			.p.name = "mvc1",
257			CODEC_LONG_NAME("Silicon Graphics Motion Video Compressor 1"),
258			.p.type = AVMEDIA_TYPE_VIDEO,
259			.p.id = AV_CODEC_ID_MVC1,
260			.priv_data_size = sizeof(MvcContext),
261			.init = mvc_decode_init,
262			FF_CODEC_DECODE_CB(mvc_decode_frame),
263			.p.capabilities = AV_CODEC_CAP_DR1,
264			};
265			#endif
266
267			#if CONFIG_MVC2_DECODER
268			const FFCodec ff_mvc2_decoder = {
269			.p.name = "mvc2",
270			CODEC_LONG_NAME("Silicon Graphics Motion Video Compressor 2"),
271			.p.type = AVMEDIA_TYPE_VIDEO,
272			.p.id = AV_CODEC_ID_MVC2,
273			.priv_data_size = sizeof(MvcContext),
274			.init = mvc_decode_init,
275			FF_CODEC_DECODE_CB(mvc_decode_frame),
276			.p.capabilities = AV_CODEC_CAP_DR1,
277			};
278			#endif
279

Function (Line)	Call count	Block coverage
decode_mvc1 (line 63)	called 28 times, returned 28 times	95.0%
decode_mvc2 (line 136)	called 32 times, returned 32 times	93.0%
mvc_decode_frame (line 228)	called 60 times, returned 60 times	83.0%
mvc_decode_init (line 40)	called 4 times, returned 4 times	86.0%
set_4x4_block (line 111)	called 45612 times, returned 45612 times	100.0%