唐僧最后成了什么佛

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

	Exec	Total	Coverage
Lines:	57	67	85.1%
Functions:	5	5	100.0%
Branches:	32	54	59.3%

  
      Line
      Branch
      Exec
      Source
    
      /*
    
       * Tele-typewriter demuxer
    
       * Copyright (c) 2010 Peter Ross <pross@xvid.org>
    
       *
    
       * 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
    
       * Tele-typewriter demuxer
    
       */
    
      #include "libavutil/intreadwrite.h"
    
      #include "libavutil/avstring.h"
    
      #include "libavutil/log.h"
    
      #include "libavutil/dict.h"
    
      #include "libavutil/opt.h"
    
      #include "libavutil/parseutils.h"
    
      #include "avformat.h"
    
      #include "demux.h"
    
      #include "internal.h"
    
      #include "sauce.h"
    
      375605
      static int isansicode(int x)
    
      {
    
        10/10✓ Branch 0 taken 374119 times.
✓ Branch 1 taken 1486 times.
✓ Branch 2 taken 370222 times.
✓ Branch 3 taken 3897 times.
✓ Branch 4 taken 368846 times.
✓ Branch 5 taken 1376 times.
✓ Branch 6 taken 271060 times.
✓ Branch 7 taken 97786 times.
✓ Branch 8 taken 186535 times.
✓ Branch 9 taken 84525 times.

      375605
          return x == 0x1B || x == 0x0A || x == 0x0D || (x >= 0x20 && x < 0x7f);
    
      }
    
      static const char tty_extensions[31] = "ans,art,asc,diz,ice,nfo,txt,vt";
    
      typedef struct TtyDemuxContext {
    
          AVClass *class;
    
          int chars_per_frame;
    
          uint64_t fsize;  /**< file size less metadata buffer */
    
          int width, height; /**< Set by a private option. */
    
          AVRational framerate; /**< Set by a private option. */
    
      } TtyDemuxContext;
    
      7241
      static int read_probe(const AVProbeData *p)
    
      {
    
      7241
          int cnt = 0;
    
        1/2✗ Branch 0 not taken.
✓ Branch 1 taken 7241 times.

      7241
          if (!p->buf_size)
    
      ✗
              return 0;
    
        3/4✓ Branch 0 taken 57928 times.
✓ Branch 1 taken 7241 times.
✓ Branch 2 taken 57928 times.
✗ Branch 3 not taken.

      65169
          for (int i = 0; i < 8 && i < p->buf_size; i++)
    
      57928
              cnt += !!isansicode(p->buf[i]);
    
        2/2✓ Branch 0 taken 7060 times.
✓ Branch 1 taken 181 times.

      7241
          if (cnt != 8)
    
      7060
              return 0;
    
        2/2✓ Branch 0 taken 317677 times.
✓ Branch 1 taken 181 times.

      317858
          for (int i = 8; i < p->buf_size; i++)
    
      317677
              cnt += !!isansicode(p->buf[i]);
    
      362
          return (cnt * 99LL / p->buf_size) * (cnt > 400) *
    
      181
              !!av_match_ext(p->filename, tty_extensions);
    
      }
    
      /**
    
       * Parse EFI header
    
       */
    
      1
      static int efi_read(AVFormatContext *avctx, uint64_t start_pos)
    
      {
    
      1
          TtyDemuxContext *s = avctx->priv_data;
    
      1
          AVIOContext *pb = avctx->pb;
    
          char buf[37];
    
          int len;
    
      1
          avio_seek(pb, start_pos, SEEK_SET);
    
        1/2✓ Branch 1 taken 1 times.
✗ Branch 2 not taken.

      1
          if (avio_r8(pb) != 0x1A)
    
      1
              return -1;
    
      #define GET_EFI_META(name,size) \
    
          len = avio_r8(pb); \
    
          if (len < 1 || len > size) \
    
              return -1; \
    
          if (avio_read(pb, buf, size) == size) { \
    
              buf[len] = 0; \
    
              av_dict_set(&avctx->metadata, name, buf, 0); \
    
          }
    
      ✗
          GET_EFI_META("filename", 12)
    
      ✗
          GET_EFI_META("title",    36)
    
      ✗
          s->fsize = start_pos;
    
      ✗
          return 0;
    
      }
    
      2
      static int read_header(AVFormatContext *avctx)
    
      {
    
      2
          TtyDemuxContext *s = avctx->priv_data;
    
      2
          int ret = 0;
    
      2
          AVStream *st = avformat_new_stream(avctx, NULL);
    
        1/2✗ Branch 0 not taken.
✓ Branch 1 taken 2 times.

      2
          if (!st) {
    
      ✗
              ret = AVERROR(ENOMEM);
    
      ✗
              goto fail;
    
          }
    
      2
          st->codecpar->codec_tag   = 0;
    
      2
          st->codecpar->codec_type  = AVMEDIA_TYPE_VIDEO;
    
      2
          st->codecpar->codec_id    = AV_CODEC_ID_ANSI;
    
      2
          st->codecpar->width  = s->width;
    
      2
          st->codecpar->height = s->height;
    
      2
          avpriv_set_pts_info(st, 60, s->framerate.den, s->framerate.num);
    
      2
          st->avg_frame_rate = s->framerate;
    
          /* simulate tty display speed */
    
        1/2✓ Branch 1 taken 2 times.
✗ Branch 2 not taken.

      2
          s->chars_per_frame = FFMAX(av_q2d(st->time_base)*s->chars_per_frame, 1);
    
        1/2✗ Branch 0 not taken.
✓ Branch 1 taken 2 times.

      2
          if (avctx->pb->seekable & AVIO_SEEKABLE_NORMAL) {
    
      2
              int64_t fsize = avio_size(avctx->pb);
    
        1/2✗ Branch 0 not taken.
✓ Branch 1 taken 2 times.

      2
              if (fsize > 0) {
    
      2
                  s->fsize = fsize;
    
      2
                  st->duration = (s->fsize + s->chars_per_frame - 1) / s->chars_per_frame;
    
        2/2✓ Branch 1 taken 1 times.
✓ Branch 2 taken 1 times.

      2
                  if (ff_sauce_read(avctx, &s->fsize, 0, 0) < 0)
    
      1
                      efi_read(avctx, s->fsize - 51);
    
      2
                  avio_seek(avctx->pb, 0, SEEK_SET);
    
              }
    
          }
    
      ✗
      fail:
    
      2
          return ret;
    
      }
    
      27
      static int read_packet(AVFormatContext *avctx, AVPacket *pkt)
    
      {
    
      27
          TtyDemuxContext *s = avctx->priv_data;
    
          int n;
    
        1/2✗ Branch 1 not taken.
✓ Branch 2 taken 27 times.

      27
          if (avio_feof(avctx->pb))
    
      ✗
              return AVERROR_EOF;
    
      27
          n = s->chars_per_frame;
    
        1/2✓ Branch 0 taken 27 times.
✗ Branch 1 not taken.

      27
          if (s->fsize) {
    
              // ignore metadata buffer
    
      27
              uint64_t p = avio_tell(avctx->pb);
    
        2/2✓ Branch 0 taken 2 times.
✓ Branch 1 taken 25 times.

      27
              if (p == s->fsize)
    
      2
                  return AVERROR_EOF;
    
        2/2✓ Branch 0 taken 2 times.
✓ Branch 1 taken 23 times.

      25
              if (p + s->chars_per_frame > s->fsize)
    
      2
                  n = s->fsize - p;
    
          }
    
      25
          pkt->size = av_get_packet(avctx->pb, pkt, n);
    
        1/2✗ Branch 0 not taken.
✓ Branch 1 taken 25 times.

      25
          if (pkt->size < 0)
    
      ✗
              return pkt->size;
    
      25
          pkt->stream_index = 0;
    
      25
          pkt->pts = pkt->pos / s->chars_per_frame;
    
      25
          pkt->flags |= AV_PKT_FLAG_KEY;
    
      25
          return 0;
    
      }
    
      #define OFFSET(x) offsetof(TtyDemuxContext, x)
    
      #define DEC AV_OPT_FLAG_DECODING_PARAM
    
      static const AVOption options[] = {
    
          { "chars_per_frame", "", offsetof(TtyDemuxContext, chars_per_frame), AV_OPT_TYPE_INT, {.i64 = 6000}, 1, INT_MAX, AV_OPT_FLAG_DECODING_PARAM},
    
          { "video_size", "A string describing frame size, such as 640x480 or hd720.", OFFSET(width), AV_OPT_TYPE_IMAGE_SIZE, {.str = NULL}, 0, 0, DEC },
    
          { "framerate", "", OFFSET(framerate), AV_OPT_TYPE_VIDEO_RATE, {.str = "25"}, 0, INT_MAX, DEC },
    
          { NULL },
    
      };
    
      static const AVClass tty_demuxer_class = {
    
          .class_name     = "TTY demuxer",
    
          .item_name      = av_default_item_name,
    
          .option         = options,
    
          .version        = LIBAVUTIL_VERSION_INT,
    
      };
    
      const FFInputFormat ff_tty_demuxer = {
    
          .p.name         = "tty",
    
          .p.long_name    = NULL_IF_CONFIG_SMALL("Tele-typewriter"),
    
          .p.extensions   = tty_extensions,
    
          .p.priv_class   = &tty_demuxer_class,
    
          .p.flags        = AVFMT_GENERIC_INDEX,
    
          .priv_data_size = sizeof(TtyDemuxContext),
    
          .read_probe     = read_probe,
    
          .read_header    = read_header,
    
          .read_packet    = read_packet,
    
      };

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Line	Branch	Exec	Source
1			/*
2			* Tele-typewriter demuxer
3			* Copyright (c) 2010 Peter Ross <pross@xvid.org>
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			* Tele-typewriter demuxer
25			*/
26
27			#include "libavutil/intreadwrite.h"
28			#include "libavutil/avstring.h"
29			#include "libavutil/log.h"
30			#include "libavutil/dict.h"
31			#include "libavutil/opt.h"
32			#include "libavutil/parseutils.h"
33			#include "avformat.h"
34			#include "demux.h"
35			#include "internal.h"
36			#include "sauce.h"
37
38		375605	static int isansicode(int x)
39			{
40	10/10 ✓ Branch 0 taken 374119 times. ✓ Branch 1 taken 1486 times. ✓ Branch 2 taken 370222 times. ✓ Branch 3 taken 3897 times. ✓ Branch 4 taken 368846 times. ✓ Branch 5 taken 1376 times. ✓ Branch 6 taken 271060 times. ✓ Branch 7 taken 97786 times. ✓ Branch 8 taken 186535 times. ✓ Branch 9 taken 84525 times.	375605	return x == 0x1B \|\| x == 0x0A \|\| x == 0x0D \|\| (x >= 0x20 && x < 0x7f);
41			}
42
43			static const char tty_extensions[31] = "ans,art,asc,diz,ice,nfo,txt,vt";
44
45			typedef struct TtyDemuxContext {
46			AVClass *class;
47			int chars_per_frame;
48			uint64_t fsize; /*< file size less metadata buffer /
49			int width, height; /*< Set by a private option. /
50			AVRational framerate; /*< Set by a private option. /
51			} TtyDemuxContext;
52
53		7241	static int read_probe(const AVProbeData *p)
54			{
55		7241	int cnt = 0;
56
57	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 7241 times.	7241	if (!p->buf_size)
58		✗	return 0;
59
60	3/4 ✓ Branch 0 taken 57928 times. ✓ Branch 1 taken 7241 times. ✓ Branch 2 taken 57928 times. ✗ Branch 3 not taken.	65169	for (int i = 0; i < 8 && i < p->buf_size; i++)
61		57928	cnt += !!isansicode(p->buf[i]);
62
63	2/2 ✓ Branch 0 taken 7060 times. ✓ Branch 1 taken 181 times.	7241	if (cnt != 8)
64		7060	return 0;
65
66	2/2 ✓ Branch 0 taken 317677 times. ✓ Branch 1 taken 181 times.	317858	for (int i = 8; i < p->buf_size; i++)
67		317677	cnt += !!isansicode(p->buf[i]);
68
69		362	return (cnt * 99LL / p->buf_size) * (cnt > 400) *
70		181	!!av_match_ext(p->filename, tty_extensions);
71			}
72
73			/**
74			* Parse EFI header
75			*/
76		1	static int efi_read(AVFormatContext *avctx, uint64_t start_pos)
77			{
78		1	TtyDemuxContext *s = avctx->priv_data;
79		1	AVIOContext *pb = avctx->pb;
80			char buf[37];
81			int len;
82
83		1	avio_seek(pb, start_pos, SEEK_SET);
84	1/2 ✓ Branch 1 taken 1 times. ✗ Branch 2 not taken.	1	if (avio_r8(pb) != 0x1A)
85		1	return -1;
86
87			#define GET_EFI_META(name,size) \
88			len = avio_r8(pb); \
89			if (len < 1 \|\| len > size) \
90			return -1; \
91			if (avio_read(pb, buf, size) == size) { \
92			buf[len] = 0; \
93			av_dict_set(&avctx->metadata, name, buf, 0); \
94			}
95
96		✗	GET_EFI_META("filename", 12)
97		✗	GET_EFI_META("title", 36)
98
99		✗	s->fsize = start_pos;
100		✗	return 0;
101			}
102
103		2	static int read_header(AVFormatContext *avctx)
104			{
105		2	TtyDemuxContext *s = avctx->priv_data;
106		2	int ret = 0;
107		2	AVStream *st = avformat_new_stream(avctx, NULL);
108
109	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 2 times.	2	if (!st) {
110		✗	ret = AVERROR(ENOMEM);
111		✗	goto fail;
112			}
113		2	st->codecpar->codec_tag = 0;
114		2	st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
115		2	st->codecpar->codec_id = AV_CODEC_ID_ANSI;
116
117		2	st->codecpar->width = s->width;
118		2	st->codecpar->height = s->height;
119		2	avpriv_set_pts_info(st, 60, s->framerate.den, s->framerate.num);
120		2	st->avg_frame_rate = s->framerate;
121
122			/* simulate tty display speed */
123	1/2 ✓ Branch 1 taken 2 times. ✗ Branch 2 not taken.	2	s->chars_per_frame = FFMAX(av_q2d(st->time_base)*s->chars_per_frame, 1);
124
125	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 2 times.	2	if (avctx->pb->seekable & AVIO_SEEKABLE_NORMAL) {
126		2	int64_t fsize = avio_size(avctx->pb);
127	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 2 times.	2	if (fsize > 0) {
128		2	s->fsize = fsize;
129		2	st->duration = (s->fsize + s->chars_per_frame - 1) / s->chars_per_frame;
130
131	2/2 ✓ Branch 1 taken 1 times. ✓ Branch 2 taken 1 times.	2	if (ff_sauce_read(avctx, &s->fsize, 0, 0) < 0)
132		1	efi_read(avctx, s->fsize - 51);
133
134		2	avio_seek(avctx->pb, 0, SEEK_SET);
135			}
136			}
137
138		✗	fail:
139		2	return ret;
140			}
141
142		27	static int read_packet(AVFormatContext avctx, AVPacket pkt)
143			{
144		27	TtyDemuxContext *s = avctx->priv_data;
145			int n;
146
147	1/2 ✗ Branch 1 not taken. ✓ Branch 2 taken 27 times.	27	if (avio_feof(avctx->pb))
148		✗	return AVERROR_EOF;
149
150		27	n = s->chars_per_frame;
151	1/2 ✓ Branch 0 taken 27 times. ✗ Branch 1 not taken.	27	if (s->fsize) {
152			// ignore metadata buffer
153		27	uint64_t p = avio_tell(avctx->pb);
154	2/2 ✓ Branch 0 taken 2 times. ✓ Branch 1 taken 25 times.	27	if (p == s->fsize)
155		2	return AVERROR_EOF;
156	2/2 ✓ Branch 0 taken 2 times. ✓ Branch 1 taken 23 times.	25	if (p + s->chars_per_frame > s->fsize)
157		2	n = s->fsize - p;
158			}
159
160		25	pkt->size = av_get_packet(avctx->pb, pkt, n);
161	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 25 times.	25	if (pkt->size < 0)
162		✗	return pkt->size;
163		25	pkt->stream_index = 0;
164		25	pkt->pts = pkt->pos / s->chars_per_frame;
165		25	pkt->flags \|= AV_PKT_FLAG_KEY;
166		25	return 0;
167			}
168
169			#define OFFSET(x) offsetof(TtyDemuxContext, x)
170			#define DEC AV_OPT_FLAG_DECODING_PARAM
171			static const AVOption options[] = {
172			{ "chars_per_frame", "", offsetof(TtyDemuxContext, chars_per_frame), AV_OPT_TYPE_INT, {.i64 = 6000}, 1, INT_MAX, AV_OPT_FLAG_DECODING_PARAM},
173			{ "video_size", "A string describing frame size, such as 640x480 or hd720.", OFFSET(width), AV_OPT_TYPE_IMAGE_SIZE, {.str = NULL}, 0, 0, DEC },
174			{ "framerate", "", OFFSET(framerate), AV_OPT_TYPE_VIDEO_RATE, {.str = "25"}, 0, INT_MAX, DEC },
175			{ NULL },
176			};
177
178			static const AVClass tty_demuxer_class = {
179			.class_name = "TTY demuxer",
180			.item_name = av_default_item_name,
181			.option = options,
182			.version = LIBAVUTIL_VERSION_INT,
183			};
184
185			const FFInputFormat ff_tty_demuxer = {
186			.p.name = "tty",
187			.p.long_name = NULL_IF_CONFIG_SMALL("Tele-typewriter"),
188			.p.extensions = tty_extensions,
189			.p.priv_class = &tty_demuxer_class,
190			.p.flags = AVFMT_GENERIC_INDEX,
191			.priv_data_size = sizeof(TtyDemuxContext),
192			.read_probe = read_probe,
193			.read_header = read_header,
194			.read_packet = read_packet,
195			};
196

Function (Line)	Call count	Block coverage
efi_read (line 76)	called 1 time, returned 1 time	29.0%
isansicode (line 38)	called 375605 times, returned 375605 times	100.0%
read_header (line 103)	called 2 times, returned 2 times	80.0%
read_packet (line 142)	called 27 times, returned 27 times	86.0%
read_probe (line 53)	called 7241 times, returned 7241 times	94.0%