codec-cfg.c

自己移植的linux下的流媒体播放器原代码,支持mms协议,支持ftp和http协议.

/*
 * codec.conf parser
 * by Szabolcs Berecz <[e-mail]>
 * (C) 2001
 *
 * to compile tester app: gcc -Iloader/ -DTESTING -o codec-cfg codec-cfg.c
 * to compile CODECS2HTML: gcc -Iloader/ -DCODECS2HTML -o codecs2html codecs-cfg.c
 *
 * TODO: implement informat in CODECS2HTML too
 */

#define DEBUG

//disable asserts
#define NDEBUG 

#include <stdio.h>
#include <stdlib.h>
#include <fcntl.h>
#include <unistd.h>
#include <errno.h>
#include <ctype.h>
#include <assert.h>
#include <string.h>

#include "config.h"
#include "mp_msg.h"

#include "help_mp.h"

// for mmioFOURCC:
#include "libmpdemux/aviheader.h"

#include "libmpcodecs/img_format.h"
#include "codec-cfg.h"

#ifndef CODECS2HTML
#include "codecs.conf.h"
#endif

#define PRINT_LINENUM mp_msg(MSGT_CODECCFG,MSGL_ERR," at line %d\n", line_num)

#define MAX_NR_TOKEN	16

#define MAX_LINE_LEN	1000

#define RET_EOF		-1
#define RET_EOL		-2

#define TYPE_VIDEO	0
#define TYPE_AUDIO	1

char * codecs_file = NULL;

static int add_to_fourcc(char *s, char *alias, unsigned int *fourcc,
		unsigned int *map)
{
	int i, j, freeslots;
	unsigned int tmp;

	/* find first unused slot */
	for (i = 0; i < CODECS_MAX_FOURCC && fourcc[i] != 0xffffffff; i++)
		/* NOTHING */;
	freeslots = CODECS_MAX_FOURCC - i;
	if (!freeslots)
		goto err_out_too_many;

	do {
		tmp = mmioFOURCC(s[0], s[1], s[2], s[3]);
		for (j = 0; j < i; j++)
			if (tmp == fourcc[j])
				goto err_out_duplicated;
		fourcc[i] = tmp;
		map[i] = alias ? mmioFOURCC(alias[0], alias[1], alias[2], alias[3]) : tmp;
		s += 4;
		i++;
	} while ((*(s++) == ',') && --freeslots);

	if (!freeslots)
		goto err_out_too_many;
	if (*(--s) != '\0')
		goto err_out_parse_error;
	return 1;
err_out_duplicated:
	mp_msg(MSGT_CODECCFG,MSGL_ERR,MSGTR_DuplicateFourcc);
	return 0;
err_out_too_many:
	mp_msg(MSGT_CODECCFG,MSGL_ERR,MSGTR_TooManyFourccs);
	return 0;
err_out_parse_error:
	mp_msg(MSGT_CODECCFG,MSGL_ERR,MSGTR_ParseError);
	return 0;
}

static int add_to_format(char *s, char *alias,unsigned int *fourcc, unsigned int *fourccmap)
{
	int i, j;
	char *endptr;

	/* find first unused slot */
	for (i = 0; i < CODECS_MAX_FOURCC && fourcc[i] != 0xffffffff; i++)
		/* NOTHING */;
	if (i == CODECS_MAX_FOURCC) {
		mp_msg(MSGT_CODECCFG,MSGL_ERR,MSGTR_TooManyFourccs);
		return 0;
	}

        fourcc[i]=strtoul(s,&endptr,0);
	if (*endptr != '\0') {
		mp_msg(MSGT_CODECCFG,MSGL_ERR,MSGTR_ParseErrorFIDNotNumber);
		return 0;
	}

	if(alias){
	    fourccmap[i]=strtoul(alias,&endptr,0);
	    if (*endptr != '\0') {
		mp_msg(MSGT_CODECCFG,MSGL_ERR,MSGTR_ParseErrorFIDAliasNotNumber);
		return 0;
	    }
	} else
	    fourccmap[i]=fourcc[i];

	for (j = 0; j < i; j++)
		if (fourcc[j] == fourcc[i]) {
			mp_msg(MSGT_CODECCFG,MSGL_ERR,MSGTR_DuplicateFID);
			return 0;
		}

	return 1;
}

        static struct {
	        const char *name;
	        const unsigned int num;
	} fmt_table[] = {
		{"YV12",  IMGFMT_YV12},
		{"I420",  IMGFMT_I420},
		{"IYUV",  IMGFMT_IYUV},
		{"NV12",  IMGFMT_NV12},
		{"NV21",  IMGFMT_NV21},
		{"YVU9",  IMGFMT_YVU9},
		{"IF09",  IMGFMT_IF09},
		{"444P",  IMGFMT_444P},
		{"422P",  IMGFMT_422P},
		{"411P",  IMGFMT_411P},
		{"Y800",  IMGFMT_Y800},
		{"Y8",    IMGFMT_Y8},

		{"YUY2",  IMGFMT_YUY2},
		{"UYVY",  IMGFMT_UYVY},
		{"YVYU",  IMGFMT_YVYU},

	        {"RGB4",  IMGFMT_RGB|4},
	        {"RGB8",  IMGFMT_RGB|8},
		{"RGB15", IMGFMT_RGB|15}, 
		{"RGB16", IMGFMT_RGB|16},
		{"RGB24", IMGFMT_RGB|24},
		{"RGB32", IMGFMT_RGB|32},
		{"BGR4",  IMGFMT_BGR|4},
		{"BGR8",  IMGFMT_BGR|8},
		{"BGR15", IMGFMT_BGR|15},
		{"BGR16", IMGFMT_BGR|16},
		{"BGR24", IMGFMT_BGR|24},
		{"BGR32", IMGFMT_BGR|32},
	        {"RGB1",  IMGFMT_RGB|1},
		{"BGR1",  IMGFMT_BGR|1},

		{"MPES",  IMGFMT_MPEGPES},
		{"ZRMJPEGNI", IMGFMT_ZRMJPEGNI},
		{"ZRMJPEGIT", IMGFMT_ZRMJPEGIT},
		{"ZRMJPEGIB", IMGFMT_ZRMJPEGIB},

		{"IDCT_MPEG2",IMGFMT_XVMC_IDCT_MPEG2},
		{"MOCO_MPEG2",IMGFMT_XVMC_MOCO_MPEG2},

		{NULL,    0}
	};


static int add_to_inout(char *sfmt, char *sflags, unsigned int *outfmt,
		unsigned char *outflags)
{

	static char *flagstr[] = {
		"flip",
		"noflip",
		"yuvhack",
		"query",
		"static",
		NULL
	};

	int i, j, freeslots;
	unsigned char flags;

	for (i = 0; i < CODECS_MAX_OUTFMT && outfmt[i] != 0xffffffff; i++)
		/* NOTHING */;
	freeslots = CODECS_MAX_OUTFMT - i;
	if (!freeslots)
		goto err_out_too_many;

	flags = 0;
	if(sflags) {
		do {
			for (j = 0; flagstr[j] != NULL; j++)
				if (!strncmp(sflags, flagstr[j],
							strlen(flagstr[j])))
					break;
			if (flagstr[j] == NULL)
				goto err_out_parse_error;
			flags|=(1<<j);
			sflags+=strlen(flagstr[j]);
		} while (*(sflags++) == ',');

		if (*(--sflags) != '\0')
			goto err_out_parse_error;
	}

	do {
		for (j = 0; fmt_table[j].name != NULL; j++)
			if (!strncmp(sfmt, fmt_table[j].name, strlen(fmt_table[j].name)))
				break;
		if (fmt_table[j].name == NULL)
			goto err_out_parse_error;
		outfmt[i] = fmt_table[j].num;
		outflags[i] = flags;
                ++i;
		sfmt+=strlen(fmt_table[j].name);
	} while ((*(sfmt++) == ',') && --freeslots);

	if (!freeslots)
		goto err_out_too_many;

	if (*(--sfmt) != '\0')
		goto err_out_parse_error;
        
	return 1;
err_out_too_many:
	mp_msg(MSGT_CODECCFG,MSGL_ERR,MSGTR_TooManyOut);
	return 0;
err_out_parse_error:
	mp_msg(MSGT_CODECCFG,MSGL_ERR,MSGTR_ParseError);
	return 0;
}

#if 0
static short get_driver(char *s,int audioflag)
{
	static char *audiodrv[] = {
		"null",
		"mp3lib",
		"pcm",
		"libac3",
		"acm",
		"alaw",
		"msgsm",
		"dshow",
		"dvdpcm",
		"hwac3",
		"libvorbis",
		"ffmpeg",
		"libmad",
		"msadpcm",
		"liba52",
		"g72x",
		"imaadpcm",
		"dk4adpcm",
		"dk3adpcm",
		"roqaudio",
		"faad",
		"realaud",
		"libdv",
		NULL
	};
	static char *videodrv[] = {
		"null",
		"libmpeg2",
		"vfw",
		"odivx",
		"dshow",
		"ffmpeg",
		"vfwex",
		"divx4",
		"raw",
		"msrle",
		"xanim",
		"msvidc",
		"fli",
		"cinepak",
		"qtrle",
		"nuv",
		"cyuv",
		"qtsmc",
		"ducktm1",
		"roqvideo",
		"qtrpza",
		"mpng",
		"ijpg",
		"zlib",
		"mpegpes",
		"zrmjpeg",
		"realvid",
		"xvid",
		"libdv",
		NULL
	};
        char **drv=audioflag?audiodrv:videodrv;
        int i;

        for(i=0;drv[i];i++) if(!strcmp(s,drv[i])) return i;

	return -1;
}
#endif

static int validate_codec(codecs_t *c, int type)
{
	unsigned int i;
	char *tmp_name = c->name;

	for (i = 0; i < strlen(tmp_name) && isalnum(tmp_name[i]); i++)
		/* NOTHING */;

	if (i < strlen(tmp_name)) {
		mp_msg(MSGT_CODECCFG,MSGL_ERR,MSGTR_InvalidCodecName, c->name);
		return 0;
	}

	if (!c->info)
		c->info = strdup(c->name);

#if 0
	if (c->fourcc[0] == 0xffffffff) {
		mp_msg(MSGT_CODECCFG,MSGL_ERR,MSGTR_CodecLacksFourcc, c->name);
		return 0;
	}
#endif

	if (!c->drv) {
		mp_msg(MSGT_CODECCFG,MSGL_ERR,MSGTR_CodecLacksDriver, c->name);
		return 0;
	}

#if 0
#warning codec->driver == 4;... <- ezt nem kellene belehegeszteni...
#warning HOL VANNAK DEFINIALVA????????????
	if (!c->dll && (c->driver == 4 ||
				(c->driver == 2 && type == TYPE_VIDEO))) {
		mp_msg(MSGT_CODECCFG,MSGL_ERR,MSGTR_CodecNeedsDLL, c->name);
		return 0;
	}
#warning guid.f1 lehet 0? honnan lehet tudni, hogy nem adtak meg?
//	if (!(codec->flags & CODECS_FLAG_AUDIO) && codec->driver == 4)

	if (type == TYPE_VIDEO)
		if (c->outfmt[0] == 0xffffffff) {
			mp_msg(MSGT_CODECCFG,MSGL_ERR,MSGTR_CodecNeedsOutfmt, c->name);
			return 0;
		}
#endif
	return 1;
}

static int add_comment(char *s, char **d)
{
	int pos;

	if (!*d)
		pos = 0;
	else {
		pos = strlen(*d);
		(*d)[pos++] = '\n';
	}
	if (!(*d = (char *) realloc(*d, pos + strlen(s) + 1))) {
		mp_msg(MSGT_CODECCFG,MSGL_FATAL,MSGTR_CantAllocateComment);
		return 0;
	}
	strcpy(*d + pos, s);
	return 1;
}

static short get_cpuflags(char *s)
{
	static char *flagstr[] = {
		"mmx",
		"sse",
		"3dnow",
		NULL
	};
        int i;
	short flags = 0;

	do {
		for (i = 0; flagstr[i]; i++)
			if (!strncmp(s, flagstr[i], strlen(flagstr[i])))
				break;
		if (!flagstr[i])
			goto err_out_parse_error;
		flags |= 1<<i;
		s += strlen(flagstr[i]);
	} while (*(s++) == ',');

	if (*(--s) != '\0')
		goto err_out_parse_error;

	return flags;
err_out_parse_error:
	return 0;
}

static FILE *fp;
static int line_num = 0;
static char *line;
static char *token[MAX_NR_TOKEN];
static int read_nextline = 1;

static int get_token(int min, int max)
{
	static int line_pos;
	int i;
	char c;

	if (max >= MAX_NR_TOKEN) {
		mp_msg(MSGT_CODECCFG,MSGL_ERR,MSGTR_GetTokenMaxNotLessThanMAX_NR_TOKEN);
		goto out_eof;
	}

	memset(token, 0x00, sizeof(*token) * max);

	if (read_nextline) {
		if (!fgets(line, MAX_LINE_LEN, fp))
			goto out_eof;
		line_pos = 0;
		++line_num;
		read_nextline = 0;
	}
	for (i = 0; i < max; i++) {
		while (isspace(line[line_pos]))
			++line_pos;
		if (line[line_pos] == '\0' || line[line_pos] == '#' ||
				line[line_pos] == ';') {
			read_nextline = 1;
			if (i >= min)
				goto out_ok;
			goto out_eol;
		}
		token[i] = line + line_pos;
		c = line[line_pos];
		if (c == '"' || c == '\'') {
			token[i]++;
			while (line[++line_pos] != c && line[line_pos])
				/* NOTHING */;
		} else {
			for (/* NOTHING */; !isspace(line[line_pos]) &&
					line[line_pos]; line_pos++)
				/* NOTHING */;
		}
		if (!line[line_pos]) {
			read_nextline = 1;
			if (i >= min - 1)
				goto out_ok;
			goto out_eol;
		}
		line[line_pos] = '\0';
		line_pos++;
	}
out_ok:
	return i;
out_eof:
	read_nextline = 1;
	return RET_EOF;
out_eol:
	return RET_EOL;
}

static codecs_t *video_codecs=NULL;
static codecs_t *audio_codecs=NULL;
static int nr_vcodecs = 0;
static int nr_acodecs = 0;

int parse_codec_cfg(char *cfgfile)
{
	codecs_t *codec = NULL; // current codec
	codecs_t **codecsp = NULL;// points to audio_codecs or to video_codecs
	char *endptr;	// strtoul()...
	int *nr_codecsp;
	int codec_type;		/* TYPE_VIDEO/TYPE_AUDIO */
	int tmp, i;
	
	// in case we call it a second time
	codecs_uninit_free();
	
	nr_vcodecs = 0;
	nr_acodecs = 0;

	if(cfgfile==NULL) {
#ifdef CODECS2HTML
	  	return 0; 
#else
		video_codecs = builtin_video_codecs;
		audio_codecs = builtin_audio_codecs;
		nr_vcodecs = sizeof(builtin_video_codecs)/sizeof(codecs_t);
		nr_acodecs = sizeof(builtin_audio_codecs)/sizeof(codecs_t);
		return 1;
#endif
	}
	
	mp_msg(MSGT_CODECCFG,MSGL_V,MSGTR_ReadingFile, cfgfile);

	if ((fp = fopen(cfgfile, "r")) == NULL) {
		mp_msg(MSGT_CODECCFG,MSGL_V,MSGTR_CantOpenFileError, cfgfile, strerror(errno));
		return 0;
	}

	if ((line = (char *) malloc(MAX_LINE_LEN + 1)) == NULL) {
		mp_msg(MSGT_CODECCFG,MSGL_FATAL,MSGTR_CantGetMemoryForLine, strerror(errno));
		return 0;
	}
	read_nextline = 1;

	/*
	 * this only catches release lines at the start of 
	 * codecs.conf, before audiocodecs and videocodecs.
	 */
	while ((tmp = get_token(1, 1)) == RET_EOL)
		/* NOTHING */;
	if (tmp == RET_EOF)
		goto out;
	if (!strcmp(token[0], "release")) {
		if (get_token(1, 2) < 0)
			goto err_out_parse_error;
		tmp = atoi(token[0]);
		if (tmp < CODEC_CFG_MIN)
			goto err_out_release_num;
		while ((tmp = get_token(1, 1)) == RET_EOL)
			/* NOTHING */;
		if (tmp == RET_EOF)
			goto out;
	} else
		goto err_out_release_num;

	/*
	 * check if the next block starts with 'audiocodec' or
	 * with 'videocodec'
	 */
	if (!strcmp(token[0], "audiocodec") || !strcmp(token[0], "videocodec"))
		goto loop_enter;
	goto err_out_parse_error;

	while ((tmp = get_token(1, 1)) != RET_EOF) {
		if (tmp == RET_EOL)
			continue;
		if (!strcmp(token[0], "audiocodec") ||
				!strcmp(token[0], "videocodec")) {
			if (!validate_codec(codec, codec_type))
				goto err_out_not_valid;
		loop_enter:
			if (*token[0] == 'v') {
				codec_type = TYPE_VIDEO;
				nr_codecsp = &nr_vcodecs;
				codecsp = &video_codecs;
			} else if (*token[0] == 'a') {
				codec_type = TYPE_AUDIO;
				nr_codecsp = &nr_acodecs;
				codecsp = &audio_codecs;
#ifdef DEBUG
			} else {
				mp_msg(MSGT_CODECCFG,MSGL_ERR,"picsba\n");
				goto err_out;
#endif
			}
		        if (!(*codecsp = (codecs_t *) realloc(*codecsp,
				sizeof(codecs_t) * (*nr_codecsp + 2)))) {
			    mp_msg(MSGT_CODECCFG,MSGL_FATAL,MSGTR_CantReallocCodecsp, strerror(errno));
			    goto err_out;
		        }
			codec=*codecsp + *nr_codecsp;
			++*nr_codecsp;
                        memset(codec,0,sizeof(codecs_t));
			memset(codec->fourcc, 0xff, sizeof(codec->fourcc));
			memset(codec->outfmt, 0xff, sizeof(codec->outfmt));
			memset(codec->infmt, 0xff, sizeof(codec->infmt));
                        
			if (get_token(1, 1) < 0)
				goto err_out_parse_error;
			for (i = 0; i < *nr_codecsp - 1; i++) {
				if(( (*codecsp)[i].name!=NULL) && 
				    (!strcmp(token[0], (*codecsp)[i].name)) ) {
					mp_msg(MSGT_CODECCFG,MSGL_ERR,MSGTR_CodecNameNotUnique, token[0]);
					goto err_out_print_linenum;
				}
			}
			if (!(codec->name = strdup(token[0]))) {
				mp_msg(MSGT_CODECCFG,MSGL_ERR,MSGTR_CantStrdupName, strerror(errno));
				goto err_out;
			}
		} else if (!strcmp(token[0], "info")) {
			if (codec->info || get_token(1, 1) < 0)
				goto err_out_parse_error;
			if (!(codec->info = strdup(token[0]))) {
				mp_msg(MSGT_CODECCFG,MSGL_ERR,MSGTR_CantStrdupInfo, strerror(errno));
				goto err_out;
			}
		} else if (!strcmp(token[0], "comment")) {
			if (get_token(1, 1) < 0)
				goto err_out_parse_error;
			add_comment(token[0], &codec->comment);