diff options
| -rw-r--r-- | libmpdemux/Makefile | 2 | ||||
| -rw-r--r-- | libmpdemux/demux_y4m.c | 141 | ||||
| -rw-r--r-- | libmpdemux/demuxer.c | 16 | ||||
| -rw-r--r-- | libmpdemux/demuxer.h | 1 | ||||
| -rw-r--r-- | libmpdemux/yuv4mpeg.c | 766 | ||||
| -rw-r--r-- | libmpdemux/yuv4mpeg.h | 453 | ||||
| -rw-r--r-- | libmpdemux/yuv4mpeg_intern.h | 78 | ||||
| -rw-r--r-- | libmpdemux/yuv4mpeg_ratio.c | 113 |
8 files changed, 1569 insertions, 1 deletions
diff --git a/libmpdemux/Makefile b/libmpdemux/Makefile index 490138a726..f93d6afc9f 100644 --- a/libmpdemux/Makefile +++ b/libmpdemux/Makefile @@ -3,7 +3,7 @@ LIBNAME = libmpdemux.a include ../config.mak -SRCS = mp3_hdr.c video.c mpeg_hdr.c cache2.c asfheader.c aviheader.c aviprint.c aviwrite.c demux_asf.c demux_avi.c demux_mov.c demux_mpg.c demux_viv.c demuxer.c dvdauth.c open.c parse_es.c stream.c tv.c tvi_dummy.c tvi_v4l.c frequencies.c demux_fli.c demux_real.c +SRCS = mp3_hdr.c video.c mpeg_hdr.c cache2.c asfheader.c aviheader.c aviprint.c aviwrite.c demux_asf.c demux_avi.c demux_mov.c demux_mpg.c demux_viv.c demuxer.c dvdauth.c open.c parse_es.c stream.c tv.c tvi_dummy.c tvi_v4l.c frequencies.c demux_fli.c demux_real.c demux_y4m.c yuv4mpeg.c yuv4mpeg_ratio.c ifeq ($(STREAMING),yes) SRCS += asf_streaming.c url.c http.c network.c rtp.c endif diff --git a/libmpdemux/demux_y4m.c b/libmpdemux/demux_y4m.c new file mode 100644 index 0000000000..4c96b950e3 --- /dev/null +++ b/libmpdemux/demux_y4m.c @@ -0,0 +1,141 @@ +// Y4M file parser by Rik Snel (using yuv4mpeg*.[ch] from +// mjpeg.sourceforge.net) (derived from demux_viv.c) + +#include <stdio.h> +#include <stdlib.h> +#include <unistd.h> +#include <string.h> /* strtok */ + +#include "config.h" +#include "mp_msg.h" +#include "help_mp.h" +#include "yuv4mpeg.h" + +//#include "stream.h" +#include "demuxer.h" +#include "stheader.h" +#include "bswap.h" + +typedef struct { + int framenum; + y4m_stream_info_t* si; +} y4m_priv_t; + +int y4m_check_file(demuxer_t* demuxer){ + int orig_pos = stream_tell(demuxer->stream); + char buf[10]; + + mp_msg(MSGT_DEMUX, MSGL_V, "Checking for YUV4MPEG2\n"); + + stream_read(demuxer->stream, buf, 9); + buf[9] = 0; + + if (strncmp("YUV4MPEG2", buf, 9)) { + mp_msg(MSGT_DEMUX, MSGL_DBG2, "Failed: YUV4MPEG2\n"); + return 0; + } + + mp_msg(MSGT_DEMUX,MSGL_DBG2,"Success: YUV4MPEG2\n"); + + stream_seek(demuxer->stream, orig_pos); + +return 1; +} + + +// return value: +// 0 = EOF or no stream found +// 1 = successfully read a packet +int demux_y4m_fill_buffer(demuxer_t *demux) { + demux_stream_t *ds=demux->video; + demux_packet_t *dp; + y4m_priv_t *priv=demux->priv; + y4m_frame_info_t fi; + unsigned char *buf[3]; + int err, size; + + demux->filepos=stream_tell(demux->stream); + + size = ((sh_video_t*)ds->sh)->disp_w*((sh_video_t*)ds->sh)->disp_h; + + dp = new_demux_packet(3*size/2); + + /* swap U and V components */ + buf[0] = dp->buffer; + buf[1] = dp->buffer + 5*size/4; + buf[2] = dp->buffer + size; + + if ((err=y4m_read_frame(demux->stream, priv->si, &fi, buf)) != Y4M_OK) { + mp_msg(MSGT_DEMUX, MSGL_V, "error reading frame %s\n", y4m_strerr(err)); + return 0; + } + + /* This seems to be the right way to calculate the presentation time stamp */ + dp->pts=(float)priv->framenum/((sh_video_t*)ds->sh)->fps; + priv->framenum++; + dp->pos=demux->filepos; + dp->flags=0; + ds_add_packet(ds, dp); + + return 1; +} + +void demux_open_y4m(demuxer_t* demuxer){ + y4m_priv_t* priv; + y4m_ratio_t framerate; + sh_video_t* sh=new_sh_video(demuxer,0); + int err; + + demuxer->priv = malloc(sizeof(y4m_priv_t)); + priv = demuxer->priv; + + priv->framenum = 0; + priv->si = malloc(sizeof(y4m_stream_info_t)); + + y4m_init_stream_info(priv->si); + if ((err=y4m_read_stream_header(demuxer->stream, priv->si)) != Y4M_OK) + mp_msg(MSGT_DEMUXER, MSGL_FATAL, "error parsing YUV4MPEG header: %s\n", y4m_strerr(err)); + + sh->format = mmioFOURCC('Y', 'V', '1', '2'); + + if(!sh->fps) { + framerate = y4m_si_get_framerate(priv->si); + if (framerate.d != 0) + sh->fps=(float)framerate.n/(float)framerate.d; + else + sh->fps=15.0f; + } + sh->frametime=1.0f/sh->fps; + + sh->disp_w = y4m_si_get_width(priv->si); + sh->disp_h = y4m_si_get_height(priv->si); + + sh->bih=malloc(sizeof(BITMAPINFOHEADER)); + memset(sh->bih,0,sizeof(BITMAPINFOHEADER)); + sh->bih->biSize=40; + sh->bih->biWidth = priv->si->width; + sh->bih->biHeight = priv->si->height; + sh->bih->biPlanes=3; + sh->bih->biBitCount=12; + sh->bih->biCompression=sh->format; + sh->bih->biSizeImage=sh->bih->biWidth*sh->bih->biHeight*3/2; /* YV12 */ + + demuxer->video->sh=sh; + sh->ds=demuxer->video; + demuxer->video->id=0; + + /* disable seeking, lazy */ + demuxer->seekable = 0; + + printf("YUV4MPEG2 Video stream %d size: display: %dx%d, codec: %ux%u\n", + demuxer->video->id, sh->disp_w, sh->disp_h, sh->bih->biWidth, + sh->bih->biHeight); +} + +void demux_close_y4m(demuxer_t *demuxer) +{ + y4m_fini_stream_info(((y4m_priv_t*)demuxer->priv)->si); + free(((y4m_priv_t*)demuxer->priv)->si); + free(demuxer->priv); + return; +} diff --git a/libmpdemux/demuxer.c b/libmpdemux/demuxer.c index 85da5ffc48..ad1f379086 100644 --- a/libmpdemux/demuxer.c +++ b/libmpdemux/demuxer.c @@ -168,6 +168,7 @@ extern int tv_param_on; extern int demux_tv_fill_buffer(demuxer_t *demux, tvi_handle_t *tvh); extern int demux_open_tv(demuxer_t *demuxer, tvi_handle_t *tvh); #endif +int demux_y4m_fill_buffer(demuxer_t *demux); int demux_fill_buffer(demuxer_t *demux,demux_stream_t *ds){ // Note: parameter 'ds' can be NULL! @@ -186,6 +187,7 @@ int demux_fill_buffer(demuxer_t *demux,demux_stream_t *ds){ #ifdef USE_TV case DEMUXER_TYPE_TV: return demux_tv_fill_buffer(demux, tv_handler); #endif + case DEMUXER_TYPE_Y4M: return demux_y4m_fill_buffer(demux); } return 0; } @@ -363,6 +365,8 @@ int demux_open_fli(demuxer_t* demuxer); extern int vivo_check_file(demuxer_t *demuxer); extern void demux_open_vivo(demuxer_t *demuxer); +extern int y4m_check_file(demuxer_t *demuxer); +extern void demux_open_y4m(demuxer_t *demuxer); extern int real_check_file(demuxer_t *demuxer); extern void demux_open_real(demuxer_t *demuxer); @@ -414,6 +418,14 @@ if(file_format==DEMUXER_TYPE_UNKNOWN || file_format==DEMUXER_TYPE_ASF){ file_format=DEMUXER_TYPE_ASF; } } +//=============== Try to open as Y4M file: ================= +if(file_format==DEMUXER_TYPE_UNKNOWN || file_format==DEMUXER_TYPE_Y4M){ + demuxer=new_demuxer(stream,DEMUXER_TYPE_Y4M,audio_id,video_id,dvdsub_id); + if(y4m_check_file(demuxer)){ + mp_msg(MSGT_DEMUXER,MSGL_INFO,"Detected YUV4MPEG2 file format!\n"); + file_format=DEMUXER_TYPE_Y4M; + } +} //=============== Try to open as MOV file: ================= if(file_format==DEMUXER_TYPE_UNKNOWN || file_format==DEMUXER_TYPE_MOV){ demuxer=new_demuxer(stream,DEMUXER_TYPE_MOV,audio_id,video_id,dvdsub_id); @@ -543,6 +555,10 @@ switch(file_format){ demux_open_vivo(demuxer); break; } + case DEMUXER_TYPE_Y4M: { + demux_open_y4m(demuxer); + break; + } case DEMUXER_TYPE_REAL: { demux_open_real(demuxer); break; diff --git a/libmpdemux/demuxer.h b/libmpdemux/demuxer.h index 4bd65b2bba..c61291331c 100644 --- a/libmpdemux/demuxer.h +++ b/libmpdemux/demuxer.h @@ -14,6 +14,7 @@ #define DEMUXER_TYPE_TV 9 #define DEMUXER_TYPE_FLI 10 #define DEMUXER_TYPE_REAL 11 +#define DEMUXER_TYPE_Y4M 12 #define DEMUXER_TIME_NONE 0 #define DEMUXER_TIME_PTS 1 diff --git a/libmpdemux/yuv4mpeg.c b/libmpdemux/yuv4mpeg.c new file mode 100644 index 0000000000..c96843e86e --- /dev/null +++ b/libmpdemux/yuv4mpeg.c @@ -0,0 +1,766 @@ +/* + * yuv4mpeg.c: Functions for reading and writing "new" YUV4MPEG streams + * + * Copyright (C) 2001 Matthew J. Marjanovic <maddog@mir.com> + * + * This file is ripped from the lavtools package (mjpeg.sourceforge.net) + * Ported to mplayer by Rik Snel <snel@phys.uu.nl> + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * This program 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 General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. + * + */ + +#include "config.h" + +#include <unistd.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include "yuv4mpeg.h" +#include "yuv4mpeg_intern.h" +#include "mp_msg.h" + +static int _y4mparam_allow_unknown_tags = 1; /* default is forgiveness */ + +static void *(*_y4m_alloc)(size_t bytes) = malloc; +static void (*_y4m_free)(void *ptr) = free; + +int y4m_allow_unknown_tags(int yn) { + int old = _y4mparam_allow_unknown_tags; + if (yn >= 0) _y4mparam_allow_unknown_tags = (yn) ? 1 : 0; + return old; +} + + + +/************************************************************************* + * + * Convenience functions for fd read/write + * + * - guaranteed to transfer entire payload (or fail) + * - returns: + * 0 on complete success + * +(# of remaining bytes) on eof (for y4m_read) + * -(# of rem. bytes) on error (and ERRNO should be set) + * + *************************************************************************/ + + +ssize_t y4m_read(stream_t *s, char *buf, size_t len) +{ + ssize_t n; + + while (len > 0) { + n = stream_read(s, buf, len); + if (n <= 0) { + /* return amount left to read */ + if (n == 0) + return len; /* n == 0 --> eof */ + else + return -len; /* n < 0 --> error */ + } + buf += n; + len -= n; + } + return 0; +} + + +#if 0 /* not needed */ +ssize_t y4m_write(int fd, char *buf, size_t len) +{ + ssize_t n; + + while (len > 0) { + n = write(fd, buf, len); + if (n < 0) return -len; /* return amount left to write */ + buf += n; + len -= n; + } + return 0; +} +#endif + + +/************************************************************************* + * + * "Extra tags" handling + * + *************************************************************************/ + + +static char *y4m_new_xtag() +{ + return _y4m_alloc(Y4M_MAX_XTAG_SIZE * sizeof(char)); +} + + +void y4m_init_xtag_list(y4m_xtag_list_t *xtags) +{ + int i; + xtags->count = 0; + for (i = 0; i < Y4M_MAX_XTAGS; i++) { + xtags->tags[i] = NULL; + } +} + + +void y4m_fini_xtag_list(y4m_xtag_list_t *xtags) +{ + int i; + for (i = 0; i < Y4M_MAX_XTAGS; i++) { + if (xtags->tags[i] != NULL) { + _y4m_free(xtags->tags[i]); + xtags->tags[i] = NULL; + } + } + xtags->count = 0; +} + + +void y4m_copy_xtag_list(y4m_xtag_list_t *dest, const y4m_xtag_list_t *src) +{ + int i; + for (i = 0; i < src->count; i++) { + if (dest->tags[i] == NULL) + dest->tags[i] = y4m_new_xtag(); + strncpy(dest->tags[i], src->tags[i], Y4M_MAX_XTAG_SIZE); + } + dest->count = src->count; +} + + + +static int y4m_snprint_xtags(char *s, int maxn, y4m_xtag_list_t *xtags) +{ + int i, room; + + for (i = 0, room = maxn - 1; i < xtags->count; i++) { + int n = snprintf(s, room + 1, " %s", xtags->tags[i]); + if ((n < 0) || (n > room)) return Y4M_ERR_HEADER; + s += n; + room -= n; + } + s[0] = '\n'; /* finish off header with newline */ + s[1] = '\0'; /* ...and end-of-string */ + return Y4M_OK; +} + + +int y4m_xtag_count(const y4m_xtag_list_t *xtags) +{ + return xtags->count; +} + + +const char *y4m_xtag_get(const y4m_xtag_list_t *xtags, int n) +{ + if (n >= xtags->count) + return NULL; + else + return xtags->tags[n]; +} + + +int y4m_xtag_add(y4m_xtag_list_t *xtags, const char *tag) +{ + if (xtags->count >= Y4M_MAX_XTAGS) return Y4M_ERR_XXTAGS; + if (xtags->tags[xtags->count] == NULL) { + xtags->tags[xtags->count] = y4m_new_xtag(); + } + strncpy(xtags->tags[xtags->count], tag, Y4M_MAX_XTAG_SIZE); + (xtags->count)++; + return Y4M_OK; +} + + +int y4m_xtag_remove(y4m_xtag_list_t *xtags, int n) +{ + int i; + char *q; + + if ((n < 0) || (n >= xtags->count)) return Y4M_ERR_RANGE; + q = xtags->tags[n]; + for (i = n; i < (xtags->count - 1); i++) + xtags->tags[i] = xtags->tags[i+1]; + xtags->tags[i] = q; + (xtags->count)--; + return Y4M_OK; +} + + +int y4m_xtag_clearlist(y4m_xtag_list_t *xtags) +{ + xtags->count = 0; + return Y4M_OK; +} + + +int y4m_xtag_addlist(y4m_xtag_list_t *dest, const y4m_xtag_list_t *src) +{ + int i, j; + + if ((dest->count + src->count) > Y4M_MAX_XTAGS) return Y4M_ERR_XXTAGS; + for (i = dest->count, j = 0; + j < src->count; + i++, j++) { + if (dest->tags[i] == NULL) + dest->tags[i] = y4m_new_xtag(); + strncpy(dest->tags[i], src->tags[i], Y4M_MAX_XTAG_SIZE); + } + dest->count += src->count; + return Y4M_OK; +} + + +/************************************************************************* + * + * Creators/destructors for y4m_*_info_t structures + * + *************************************************************************/ + + +void y4m_init_stream_info(y4m_stream_info_t *info) +{ + if (info == NULL) return; + /* initialize info */ + info->width = Y4M_UNKNOWN; + info->height = Y4M_UNKNOWN; + info->interlace = Y4M_UNKNOWN; + info->framerate = y4m_fps_UNKNOWN; + info->sampleaspect = y4m_sar_UNKNOWN; + y4m_init_xtag_list(&(info->x_tags)); +} + + +void y4m_copy_stream_info(y4m_stream_info_t *dest, y4m_stream_info_t *src) +{ + if ((dest == NULL) || (src == NULL)) return; + /* copy info */ + dest->width = src->width; + dest->height = src->height; + dest->interlace = src->interlace; + dest->framerate = src->framerate; + dest->sampleaspect = src->sampleaspect; + y4m_copy_xtag_list(&(dest->x_tags), &(src->x_tags)); +} + + +void y4m_fini_stream_info(y4m_stream_info_t *info) +{ + if (info == NULL) return; + y4m_fini_xtag_list(&(info->x_tags)); +} + + +void y4m_si_set_width(y4m_stream_info_t *si, int width) +{ + si->width = width; + si->framelength = (si->height * si->width) * 3 / 2; +} + +int y4m_si_get_width(y4m_stream_info_t *si) +{ return si->width; } + +void y4m_si_set_height(y4m_stream_info_t *si, int height) +{ + si->height = height; + si->framelength = (si->height * si->width) * 3 / 2; +} + +int y4m_si_get_height(y4m_stream_info_t *si) +{ return si->height; } + +void y4m_si_set_interlace(y4m_stream_info_t *si, int interlace) +{ si->interlace = interlace; } + +int y4m_si_get_interlace(y4m_stream_info_t *si) +{ return si->interlace; } + +void y4m_si_set_framerate(y4m_stream_info_t *si, y4m_ratio_t framerate) +{ si->framerate = framerate; } + +y4m_ratio_t y4m_si_get_framerate(y4m_stream_info_t *si) +{ return si->framerate; } + +void y4m_si_set_sampleaspect(y4m_stream_info_t *si, y4m_ratio_t sar) +{ si->sampleaspect = sar; } + +y4m_ratio_t y4m_si_get_sampleaspect(y4m_stream_info_t *si) +{ return si->sampleaspect; } + +int y4m_si_get_framelength(y4m_stream_info_t *si) +{ return si->framelength; } + +y4m_xtag_list_t *y4m_si_xtags(y4m_stream_info_t *si) +{ return &(si->x_tags); } + + + +void y4m_init_frame_info(y4m_frame_info_t *info) +{ + if (info == NULL) return; + /* initialize info */ + y4m_init_xtag_list(&(info->x_tags)); +} + + +void y4m_copy_frame_info(y4m_frame_info_t *dest, y4m_frame_info_t *src) +{ + if ((dest == NULL) || (src == NULL)) return; + /* copy info */ + y4m_copy_xtag_list(&(dest->x_tags), &(src->x_tags)); +} + + +void y4m_fini_frame_info(y4m_frame_info_t *info) +{ + if (info == NULL) return; + y4m_fini_xtag_list(&(info->x_tags)); +} + + + +/************************************************************************* + * + * Tag parsing + * + *************************************************************************/ + +int y4m_parse_stream_tags(char *s, y4m_stream_info_t *i) +{ + char *token, *value; + char tag; + int err; + + /* parse fields */ + for (token = strtok(s, Y4M_DELIM); + token != NULL; + token = strtok(NULL, Y4M_DELIM)) { + if (token[0] == '\0') continue; /* skip empty strings */ + tag = token[0]; + value = token + 1; + switch (tag) { + case 'W': /* width */ + i->width = atoi(value); + if (i->width <= 0) return Y4M_ERR_RANGE; + break; + case 'H': /* height */ + i->height = atoi(value); + if (i->height <= 0) return Y4M_ERR_RANGE; + break; + case 'F': /* frame rate (fps) */ + if ((err = y4m_parse_ratio(&(i->framerate), value)) != Y4M_OK) + return err; + if (i->framerate.n < 0) return Y4M_ERR_RANGE; + break; + case 'I': /* interlacing */ + switch (value[0]) { + case 'p': i->interlace = Y4M_ILACE_NONE; break; + case 't': i->interlace = Y4M_ILACE_TOP_FIRST; break; + case 'b': i->interlace = Y4M_ILACE_BOTTOM_FIRST; break; + case '?': + default: + i->interlace = Y4M_UNKNOWN; break; + } + break; + case 'A': /* sample (pixel) aspect ratio */ + if ((err = y4m_parse_ratio(&(i->sampleaspect), value)) != Y4M_OK) + return err; + if (i->sampleaspect.n < 0) return Y4M_ERR_RANGE; + break; + case 'X': /* 'X' meta-tag */ + if ((err = y4m_xtag_add(&(i->x_tags), token)) != Y4M_OK) return err; + break; + default: + /* possible error on unknown options */ + if (_y4mparam_allow_unknown_tags) { + /* unknown tags ok: store in xtag list and warn... */ + if ((err = y4m_xtag_add(&(i->x_tags), token)) != Y4M_OK) return err; + mp_msg(MSGT_DEMUX, MSGL_WARN, "Unknown stream tag encountered: '%s'\n", token); + } else { + /* unknown tags are *not* ok */ + return Y4M_ERR_BADTAG; + } + break; + } + } + /* Error checking... width and height must be known since we can't + * parse without them + */ + if( i->width == Y4M_UNKNOWN || i->height == Y4M_UNKNOWN ) + return Y4M_ERR_HEADER; + /* ta da! done. */ + return Y4M_OK; +} + + + +static int y4m_parse_frame_tags(char *s, y4m_frame_info_t *i) +{ + char *token, *value; + char tag; + int err; + + /* parse fields */ + for (token = strtok(s, Y4M_DELIM); + token != NULL; + token = strtok(NULL, Y4M_DELIM)) { + if (token[0] == '\0') continue; /* skip empty strings */ + tag = token[0]; + value = token + 1; + switch (tag) { + case 'X': /* 'X' meta-tag */ + if ((err = y4m_xtag_add(&(i->x_tags), token)) != Y4M_OK) return err; + break; + default: + /* possible error on unknown options */ + if (_y4mparam_allow_unknown_tags) { + /* unknown tags ok: store in xtag list and warn... */ + if ((err = y4m_xtag_add(&(i->x_tags), token)) != Y4M_OK) return err; + mp_msg(MSGT_DEMUX, MSGL_WARN, "Unknown frame tag encountered: '%s'\n", token); + } else { + /* unknown tags are *not* ok */ + return Y4M_ERR_BADTAG; + } + break; + } + } + /* ta da! done. */ + return Y4M_OK; +} + + + + + +/************************************************************************* + * + * Read/Write stream header + * + *************************************************************************/ + + +int y4m_read_stream_header(stream_t *s, y4m_stream_info_t *i) +{ + char line[Y4M_LINE_MAX]; + char *p; + int n; + int err; + + /* read the header line */ + for (n = 0, p = line; n < Y4M_LINE_MAX; n++, p++) { + if (y4m_read(s, p, 1)) + return Y4M_ERR_SYSTEM; + if (*p == '\n') { + *p = '\0'; /* Replace linefeed by end of string */ + break; + } + } + if (n >= Y4M_LINE_MAX) + return Y4M_ERR_HEADER; + /* look for keyword in header */ + if (strncmp(line, Y4M_MAGIC, strlen(Y4M_MAGIC))) + return Y4M_ERR_MAGIC; + if ((err = y4m_parse_stream_tags(line + strlen(Y4M_MAGIC), i)) != Y4M_OK) + return err; + + i->framelength = (i->height * i->width) * 3 / 2; + return Y4M_OK; +} + + +#if 0 +int y4m_write_stream_header(int fd, y4m_stream_info_t *i) +{ + char s[Y4M_LINE_MAX+1]; + int n; + int err; + + y4m_ratio_reduce(&(i->framerate)); + y4m_ratio_reduce(&(i->sampleaspect)); + n = snprintf(s, sizeof(s), "%s W%d H%d F%d:%d I%s A%d:%d", + Y4M_MAGIC, + i->width, + i->height, + i->framerate.n, i->framerate.d, + (i->interlace == Y4M_ILACE_NONE) ? "p" : + (i->interlace == Y4M_ILACE_TOP_FIRST) ? "t" : + (i->interlace == Y4M_ILACE_BOTTOM_FIRST) ? "b" : "?", + i->sampleaspect.n, i->sampleaspect.d); + if ((n < 0) || (n > Y4M_LINE_MAX)) return Y4M_ERR_HEADER; + if ((err = y4m_snprint_xtags(s + n, sizeof(s) - n - 1, &(i->x_tags))) + != Y4M_OK) + return err; + /* non-zero on error */ + return (y4m_write(fd, s, strlen(s)) ? Y4M_ERR_SYSTEM : Y4M_OK); +} +#endif + + + + +/************************************************************************* + * + * Read/Write frame header + * + *************************************************************************/ + +int y4m_read_frame_header(stream_t *s, y4m_frame_info_t *i) +{ + char line[Y4M_LINE_MAX]; + char *p; + int n; + ssize_t remain; + + /* This is more clever than read_stream_header... + Try to read "FRAME\n" all at once, and don't try to parse + if nothing else is there... + */ + remain = y4m_read(s, line, sizeof(Y4M_FRAME_MAGIC)); + if (remain != 0) + { + /* A clean EOF should end exactly at a frame-boundary */ + if( remain == sizeof(Y4M_FRAME_MAGIC) ) + return Y4M_ERR_EOF; + else + return Y4M_ERR_SYSTEM; + } + if (strncmp(line, Y4M_FRAME_MAGIC, sizeof(Y4M_FRAME_MAGIC)-1)) + return Y4M_ERR_MAGIC; + if (line[sizeof(Y4M_FRAME_MAGIC)-1] == '\n') + return Y4M_OK; /* done -- no tags: that was the end-of-line. */ + + if (line[sizeof(Y4M_FRAME_MAGIC)-1] != Y4M_DELIM[0]) { + return Y4M_ERR_MAGIC; /* wasn't a space -- what was it? */ + } + + /* proceed to get the tags... (overwrite the magic) */ + for (n = 0, p = line; n < Y4M_LINE_MAX; n++, p++) { + if (y4m_read(s, p, 1)) + return Y4M_ERR_SYSTEM; + if (*p == '\n') { + *p = '\0'; /* Replace linefeed by end of string */ + break; + } + } + if (n >= Y4M_LINE_MAX) return Y4M_ERR_HEADER; + /* non-zero on error */ + return y4m_parse_frame_tags(line, i); +} + + +#if 0 +int y4m_write_frame_header(int fd, y4m_frame_info_t *i) +{ + char s[Y4M_LINE_MAX+1]; + int n; + int err; + + n = snprintf(s, sizeof(s), "%s", Y4M_FRAME_MAGIC); + if ((n < 0) || (n > Y4M_LINE_MAX)) return Y4M_ERR_HEADER; + if ((err = y4m_snprint_xtags(s + n, sizeof(s) - n - 1, &(i->x_tags))) + != Y4M_OK) + return err; + /* non-zero on error */ + return (y4m_write(fd, s, strlen(s)) ? Y4M_ERR_SYSTEM : Y4M_OK); +} +#endif + + + +/************************************************************************* + * + * Read/Write entire frame + * + *************************************************************************/ + +int y4m_read_frame(stream_t *s, y4m_stream_info_t *si, + y4m_frame_info_t *fi, unsigned char *yuv[3]) +{ + int err; + int w = si->width; + int h = si->height; + + /* Read frame header */ + if ((err = y4m_read_frame_header(s, fi)) != Y4M_OK) return err; + /* Read luminance scanlines */ + if (y4m_read(s, yuv[0], w*h)) return Y4M_ERR_SYSTEM; + /* Read chrominance scanlines */ + if (y4m_read(s, yuv[1], w*h/4)) return Y4M_ERR_SYSTEM; + if (y4m_read(s, yuv[2], w*h/4)) return Y4M_ERR_SYSTEM; + + return Y4M_OK; +} + + + +#if 0 +int y4m_write_frame(int fd, y4m_stream_info_t *si, + y4m_frame_info_t *fi, unsigned char *yuv[3]) +{ + int err; + int w = si->width; + int h = si->height; + + /* Write frame header */ + if ((err = y4m_write_frame_header(fd, fi)) != Y4M_OK) return err; + /* Write luminance,chrominance scanlines */ + if (y4m_write(fd, yuv[0], w*h) || + y4m_write(fd, yuv[1], w*h/4) || + y4m_write(fd, yuv[2], w*h/4)) + return Y4M_ERR_SYSTEM; + return Y4M_OK; +} +#endif + + +/************************************************************************* + * + * Read/Write entire frame, (de)interleaved (to)from two separate fields + * + *************************************************************************/ + +#if 0 +int y4m_read_fields(int fd, y4m_stream_info_t *si, y4m_frame_info_t *fi, + unsigned char *upper_field[3], + unsigned char *lower_field[3]) +{ + int i, y, err; + int width = si->width; + int height = si->height; + + /* Read frame header */ + if ((err = y4m_read_frame_header(fd, fi)) != Y4M_OK) return err; + /* Read Y', Cb, and Cr planes */ + for (i = 0; i < 3; i++) { + unsigned char *srctop = upper_field[i]; + unsigned char *srcbot = lower_field[i]; + /* alternately write one line from each */ + for (y = 0; y < height; y += 2) { + if (y4m_read(fd, srctop, width)) return Y4M_ERR_SYSTEM; + srctop += width; + if (y4m_read(fd, srcbot, width)) return Y4M_ERR_SYSTEM; + srcbot += width; + } + /* for chroma, width/height are half as big */ + if (i == 0) { + width /= 2; + height /= 2; + } + } + return Y4M_OK; +} + + + +int y4m_write_fields(int fd, y4m_stream_info_t *si, y4m_frame_info_t *fi, + unsigned char *upper_field[3], + unsigned char *lower_field[3]) +{ + int i, y, err; + int width = si->width; + int height = si->height; + + /* Write frame header */ + if ((err = y4m_write_frame_header(fd, fi)) != Y4M_OK) return err; + /* Write Y', Cb, and Cr planes */ + for (i = 0; i < 3; i++) { + unsigned char *srctop = upper_field[i]; + unsigned char *srcbot = lower_field[i]; + /* alternately write one line from each */ + for (y = 0; y < height; y += 2) { + if (y4m_write(fd, srctop, width)) return Y4M_ERR_SYSTEM; + srctop += width; + if (y4m_write(fd, srcbot, width)) return Y4M_ERR_SYSTEM; + srcbot += width; + } + /* for chroma, width/height are half as big */ + if (i == 0) { + width /= 2; + height /= 2; + } + } + return Y4M_OK; +} +#endif + + +/************************************************************************* + * + * Handy logging of stream info + * + *************************************************************************/ + +void y4m_log_stream_info(const char *prefix, y4m_stream_info_t *i) +{ + char s[256]; + + snprintf(s, sizeof(s), " frame size: "); + if (i->width == Y4M_UNKNOWN) + snprintf(s+strlen(s), sizeof(s)-strlen(s), "(?)x"); + else + snprintf(s+strlen(s), sizeof(s)-strlen(s), "%dx", i->width); + if (i->height == Y4M_UNKNOWN) + snprintf(s+strlen(s), sizeof(s)-strlen(s), "(?) pixels "); + else + snprintf(s+strlen(s), sizeof(s)-strlen(s), "%d pixels ", i->height); + if (i->framelength == Y4M_UNKNOWN) + snprintf(s+strlen(s), sizeof(s)-strlen(s), "(? bytes)"); + else + snprintf(s+strlen(s), sizeof(s)-strlen(s), "(%d bytes)", i->framelength); + mp_msg(MSGT_DEMUX, MSGL_V, "%s%s\n", prefix, s); + if ((i->framerate.n == 0) && (i->framerate.d == 0)) + mp_msg(MSGT_DEMUX, MSGL_V, "%s frame rate: ??? fps\n", prefix); + else + mp_msg(MSGT_DEMUX, MSGL_V, "%s frame rate: %d/%d fps (~%f)\n", prefix, + i->framerate.n, i->framerate.d, + (double) i->framerate.n / (double) i->framerate.d); + mp_msg(MSGT_DEMUX, MSGL_V, "%s interlace: %s\n", prefix, + (i->interlace == Y4M_ILACE_NONE) ? "none/progressive" : + (i->interlace == Y4M_ILACE_TOP_FIRST) ? "top-field-first" : + (i->interlace == Y4M_ILACE_BOTTOM_FIRST) ? "bottom-field-first" : + "anyone's guess"); + if ((i->sampleaspect.n == 0) && (i->sampleaspect.d == 0)) + mp_msg(MSGT_DEMUX, MSGL_V, "%ssample aspect ratio: ?:?\n", prefix); + else + mp_msg(MSGT_DEMUX, MSGL_V, "%ssample aspect ratio: %d:%d\n", prefix, + i->sampleaspect.n, i->sampleaspect.d); +} + + +/************************************************************************* + * + * Convert error code to string + * + *************************************************************************/ + +const char *y4m_strerr(int err) +{ + switch (err) { + case Y4M_OK: return "no error"; + case Y4M_ERR_RANGE: return "parameter out of range"; + case Y4M_ERR_SYSTEM: return "stream ended unexpectedly (failed read/write)"; + case Y4M_ERR_HEADER: return "bad stream or frame header"; + case Y4M_ERR_BADTAG: return "unknown header tag"; + case Y4M_ERR_MAGIC: return "bad header magic"; + case Y4M_ERR_XXTAGS: return "too many xtags"; + case Y4M_ERR_EOF: return "end-of-file"; + default: + return "unknown error code"; + } +} + + diff --git a/libmpdemux/yuv4mpeg.h b/libmpdemux/yuv4mpeg.h new file mode 100644 index 0000000000..7ada483967 --- /dev/null +++ b/libmpdemux/yuv4mpeg.h @@ -0,0 +1,453 @@ +/* + * yuv4mpeg.h: Functions for reading and writing "new" YUV4MPEG2 streams. + * + * Stream format is described at the end of this file. + * + * + * Copyright (C) 2001 Matthew J. Marjanovic <maddog@mir.com> + * + * This file is ripped from the lavtools package (mjpeg.sourceforge.net) + * Ported to mplayer by Rik Snel <snel@phys.uu.nl> + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * This program 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 General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. + */ + +#ifndef __YUV4MPEG_H__ +#define __YUV4MPEG_H__ + +#include <stdlib.h> +//#include "mp_msg.h" +#include "stream.h" + + +/************************************************************************ + * error codes returned by y4m_* functions + ************************************************************************/ +#define Y4M_OK 0 +#define Y4M_ERR_RANGE 1 +#define Y4M_ERR_SYSTEM 2 +#define Y4M_ERR_HEADER 3 +#define Y4M_ERR_BADTAG 4 +#define Y4M_ERR_MAGIC 5 +#define Y4M_ERR_EOF 6 +#define Y4M_ERR_XXTAGS 7 + + +/* generic 'unknown' value for integer parameters (e.g. interlace, height) */ +#define Y4M_UNKNOWN -1 + + + +/************************************************************************ + * 'ratio' datatype, for rational numbers + * (see 'ratio' functions down below) + ************************************************************************/ +typedef struct _y4m_ratio { + int n; /* numerator */ + int d; /* denominator */ +} y4m_ratio_t; + + +/************************************************************************ + * useful standard framerates (as ratios) + ************************************************************************/ +extern const y4m_ratio_t y4m_fps_UNKNOWN; +extern const y4m_ratio_t y4m_fps_NTSC_FILM; /* 24000/1001 film (in NTSC) */ +extern const y4m_ratio_t y4m_fps_FILM; /* 24fps film */ +extern const y4m_ratio_t y4m_fps_PAL; /* 25fps PAL */ +extern const y4m_ratio_t y4m_fps_NTSC; /* 30000/1001 NTSC */ +extern const y4m_ratio_t y4m_fps_30; /* 30fps */ +extern const y4m_ratio_t y4m_fps_PAL_FIELD; /* 50fps PAL field rate */ +extern const y4m_ratio_t y4m_fps_NTSC_FIELD; /* 60000/1001 NTSC field rate */ +extern const y4m_ratio_t y4m_fps_60; /* 60fps */ + +/************************************************************************ + * useful standard sample (pixel) aspect ratios + ************************************************************************/ +extern const y4m_ratio_t y4m_sar_UNKNOWN; +extern const y4m_ratio_t y4m_sar_SQUARE; /* square pixels */ +extern const y4m_ratio_t y4m_sar_NTSC_CCIR601; /* 525-line (NTSC) Rec.601 */ +extern const y4m_ratio_t y4m_sar_NTSC_16_9; /* 16:9 NTSC/Rec.601 */ +extern const y4m_ratio_t y4m_sar_NTSC_SVCD_4_3; /* NTSC SVCD 4:3 */ +extern const y4m_ratio_t y4m_sar_NTSC_SVCD_16_9;/* NTSC SVCD 16:9 */ +extern const y4m_ratio_t y4m_sar_PAL_CCIR601; /* 625-line (PAL) Rec.601 */ +extern const y4m_ratio_t y4m_sar_PAL_16_9; /* 16:9 PAL/Rec.601 */ +extern const y4m_ratio_t y4m_sar_PAL_SVCD_4_3; /* PAL SVCD 4:3 */ +extern const y4m_ratio_t y4m_sar_PAL_SVCD_16_9; /* PAL SVCD 16:9 */ + + +/************************************************************************ + * 'xtag_list' --- list of unparsed and/or meta/X header tags + * + * Do not touch this structure directly! + * + * Use the y4m_xtag_*() functions (see below). + * You must initialize/finalize this structure before/after use. + ************************************************************************/ +#define Y4M_MAX_XTAGS 32 /* maximum number of xtags in list */ +#define Y4M_MAX_XTAG_SIZE 32 /* max length of an xtag (including 'X') */ +typedef struct _y4m_xtag_list { + int count; + char *tags[Y4M_MAX_XTAGS]; +} y4m_xtag_list_t; + + + +/************************************************************************ + * 'stream_info' --- stream header information + * + * Do not touch this structure directly! + * + * Use the y4m_si_*() functions (see below). + * You must initialize/finalize this structure before/after use. + ************************************************************************/ +typedef struct _y4m_stream_info { + /* values from header */ + int width; + int height; + int interlace; /* see Y4M_ILACE_* definitions below */ + y4m_ratio_t framerate; /* frames-per-second; 0:0 == unknown */ + y4m_ratio_t sampleaspect; /* pixel width/height; 0:0 == unknown */ + /* computed/derivative values */ + int framelength; /* bytes of data per frame (not including header) */ + /* mystical X tags */ + y4m_xtag_list_t x_tags; +} y4m_stream_info_t; + +/* possible options for the interlace parameter */ +#define Y4M_ILACE_NONE 0 /* non-interlaced, progressive frame */ +#define Y4M_ILACE_TOP_FIRST 1 /* interlaced, top-field first */ +#define Y4M_ILACE_BOTTOM_FIRST 2 /* interlaced, bottom-field first */ + + +/************************************************************************ + * 'frame_info' --- frame header information + * + * Do not touch this structure directly! + * + * Use the y4m_fi_*() functions (see below). + * You must initialize/finalize this structure before/after use. + ************************************************************************/ +typedef struct _y4m_frame_info { + /* mystical X tags */ + y4m_xtag_list_t x_tags; +} y4m_frame_info_t; + + + +#ifdef __cplusplus +extern "C" { +#else +#endif + + +/************************************************************************ + * 'ratio' functions + ************************************************************************/ + +/* 'normalize' a ratio (remove common factors) */ +void y4m_ratio_reduce(y4m_ratio_t *r); + +/* parse "nnn:ddd" into a ratio (returns Y4M_OK or Y4M_ERR_RANGE) */ +int y4m_parse_ratio(y4m_ratio_t *r, const char *s); + +/* quick test of two ratios for equality (i.e. identical components) */ +#define Y4M_RATIO_EQL(a,b) ( ((a).n == (b).n) && ((a).d == (b).d) ) + +/* quick conversion of a ratio to a double (no divide-by-zero check!) */ +#define Y4M_RATIO_DBL(r) ((double)(r).n / (double)(r).d) + + + +/************************************************************************ + * 'xtag' functions + * + * o Before using an xtag_list (but after the structure/memory has been + * allocated), you must initialize it via y4m_init_xtag_list(). + * o After using an xtag_list (but before the structure is released), + * call y4m_fini_xtag_list() to free internal memory. + * + ************************************************************************/ + +/* initialize an xtag_list structure */ +void y4m_init_xtag_list(y4m_xtag_list_t *xtags); + +/* finalize an xtag_list structure */ +void y4m_fini_xtag_list(y4m_xtag_list_t *xtags); + +/* make one xtag_list into a copy of another */ +void y4m_copy_xtag_list(y4m_xtag_list_t *dest, const y4m_xtag_list_t *src); + +/* return number of tags in an xtag_list */ +int y4m_xtag_count(const y4m_xtag_list_t *xtags); + +/* access n'th tag in an xtag_list */ +const char *y4m_xtag_get(const y4m_xtag_list_t *xtags, int n); + +/* append a new tag to an xtag_list + returns: Y4M_OK - success + Y4M_ERR_XXTAGS - list is already full */ +int y4m_xtag_add(y4m_xtag_list_t *xtags, const char *tag); + +/* remove a tag from an xtag_list + returns: Y4M_OK - success + Y4M_ERR_RANGE - n is out of range */ +int y4m_xtag_remove(y4m_xtag_list_t *xtags, int n); + +/* remove all tags from an xtag_list + returns: Y4M_OK - success */ +int y4m_xtag_clearlist(y4m_xtag_list_t *xtags); + +/* append copies of tags from src list to dest list + returns: Y4M_OK - success + Y4M_ERR_XXTAGS - operation would overfill dest list */ +int y4m_xtag_addlist(y4m_xtag_list_t *dest, const y4m_xtag_list_t *src); + + + +/************************************************************************ + * '*_info' functions + * + * o Before using a *_info structure (but after the structure/memory has + * been allocated), you must initialize it via y4m_init_*_info(). + * o After using a *_info structure (but before the structure is released), + * call y4m_fini_*_info() to free internal memory. + * o Use the 'set' and 'get' accessors to modify or access the fields in + * the structures; don't touch the structure directly. (Ok, so there + * is no really convenient C syntax to prevent you from doing this, + * but we are all responsible programmers here, so just don't do it!) + * + ************************************************************************/ + +/* initialize a stream_info structure */ +void y4m_init_stream_info(y4m_stream_info_t *i); + +/* finalize a stream_info structure */ +void y4m_fini_stream_info(y4m_stream_info_t *i); + +/* make one stream_info into a copy of another */ +void y4m_copy_stream_info(y4m_stream_info_t *dest, y4m_stream_info_t *src); + +/* access or set stream_info fields */ +void y4m_si_set_width(y4m_stream_info_t *si, int width); +int y4m_si_get_width(y4m_stream_info_t *si); +void y4m_si_set_height(y4m_stream_info_t *si, int height); +int y4m_si_get_height(y4m_stream_info_t *si); +void y4m_si_set_interlace(y4m_stream_info_t *si, int interlace); +int y4m_si_get_interlace(y4m_stream_info_t *si); +void y4m_si_set_framerate(y4m_stream_info_t *si, y4m_ratio_t framerate); +y4m_ratio_t y4m_si_get_framerate(y4m_stream_info_t *si); +void y4m_si_set_sampleaspect(y4m_stream_info_t *si, y4m_ratio_t sar); +y4m_ratio_t y4m_si_get_sampleaspect(y4m_stream_info_t *si); +int y4m_si_get_framelength(y4m_stream_info_t *si); + +/* access stream_info xtag_list */ +y4m_xtag_list_t *y4m_si_xtags(y4m_stream_info_t *si); + + +/* initialize a frame_info structure */ +void y4m_init_frame_info(y4m_frame_info_t *i); + +/* finalize a frame_info structure */ +void y4m_fini_frame_info(y4m_frame_info_t *i); + +/* make one frame_info into a copy of another */ +void y4m_copy_frame_info(y4m_frame_info_t *dest, y4m_frame_info_t *src); + +/* access frame_info xtag_list */ +y4m_xtag_list_t *y4m_fi_xtags(y4m_frame_info_t *fi); + + + +/************************************************************************ + * blocking read and write functions + * + * o guaranteed to transfer entire payload (or fail) + * o return values: + * 0 (zero) complete success + * -(# of remaining bytes) error (and errno left set) + * +(# of remaining bytes) EOF (for y4m_read only) + * + ************************************************************************/ + +/* read len bytes from fd into buf */ +ssize_t y4m_read(stream_t *s, char *buf, size_t len); + +#if 0 +/* write len bytes from fd into buf */ +ssize_t y4m_write(int fd, char *buf, size_t len); +#endif + + +/************************************************************************ + * stream header processing functions + * + * o return values: + * Y4M_OK - success + * Y4M_ERR_* - error (see y4m_strerr() for descriptions) + * + ************************************************************************/ + +/* parse a string of stream header tags */ +int y4m_parse_stream_tags(char *s, y4m_stream_info_t *i); + +/* read a stream header from file descriptor fd */ +int y4m_read_stream_header(stream_t *s, y4m_stream_info_t *i); + +#if 0 +/* write a stream header to file descriptor fd */ +int y4m_write_stream_header(int fd, y4m_stream_info_t *i); +#endif + + +/************************************************************************ + * frame processing functions + * + * o return values: + * Y4M_OK - success + * Y4M_ERR_* - error (see y4m_strerr() for descriptions) + * + ************************************************************************/ + +/* read a frame header from file descriptor fd */ +int y4m_read_frame_header(stream_t *s, y4m_frame_info_t *i); + +#if 0 +/* write a frame header to file descriptor fd */ +int y4m_write_frame_header(int fd, y4m_frame_info_t *i); +#endif + +/* read a complete frame (header + data) + o yuv[3] points to three buffers, one each for Y, U, V planes */ +int y4m_read_frame(stream_t *s, y4m_stream_info_t *si, + y4m_frame_info_t *fi, unsigned char *yuv[3]); + +#if 0 +/* write a complete frame (header + data) + o yuv[3] points to three buffers, one each for Y, U, V planes */ +int y4m_write_frame(int fd, y4m_stream_info_t *si, + y4m_frame_info_t *fi, unsigned char *yuv[3]); +#endif + +#if 0 +/* read a complete frame (header + data), but de-interleave fields + into two separate buffers + o upper_field[3] same as yuv[3] above, but for upper field + o lower_field[3] same as yuv[3] above, but for lower field +*/ +int y4m_read_fields(int fd, y4m_stream_info_t *si, y4m_frame_info_t *fi, + unsigned char *upper_field[3], + unsigned char *lower_field[3]); + +/* write a complete frame (header + data), but interleave fields + from two separate buffers + o upper_field[3] same as yuv[3] above, but for upper field + o lower_field[3] same as yuv[3] above, but for lower field +*/ +int y4m_write_fields(int fd, y4m_stream_info_t *si, y4m_frame_info_t *fi, + unsigned char *upper_field[3], + unsigned char *lower_field[3]); + +#endif + +/************************************************************************ + * miscellaneous functions + ************************************************************************/ + +/* convenient dump of stream header info via mjpeg_log facility + * - each logged/printed line is prefixed by 'prefix' + */ +void y4m_log_stream_info(const char *prefix, y4m_stream_info_t *i); + +/* convert a Y4M_ERR_* error code into mildly explanatory string */ +const char *y4m_strerr(int err); + +/* set 'allow_unknown_tag' flag for library... + o yn = 0 : unknown header tags will produce a parsing error + o yn = 1 : unknown header tags/values will produce a warning, but + are otherwise passed along via the xtags list + o yn = -1: don't change, just return current setting + + return value: previous setting of flag +*/ +int y4m_allow_unknown_tags(int yn); + + +#ifdef __cplusplus +} +#endif + +/************************************************************************ + ************************************************************************ + + Description of the (new!, forever?) YUV4MPEG2 stream format: + + STREAM consists of + o one '\n' terminated STREAM-HEADER + o unlimited number of FRAMEs + + FRAME consists of + o one '\n' terminated FRAME-HEADER + o "length" octets of planar YCrCb 4:2:0 image data + (if frame is interlaced, then the two fields are interleaved) + + + STREAM-HEADER consists of + o string "YUV4MPEG2 " (note the space after the '2') + o unlimited number of ' ' separated TAGGED-FIELDs + o '\n' line terminator + + FRAME-HEADER consists of + o string "FRAME " (note the space after the 'E') + o unlimited number of ' ' separated TAGGED-FIELDs + o '\n' line terminator + + + TAGGED-FIELD consists of + o single ascii character tag + o VALUE (which does not contain whitespace) + + VALUE consists of + o integer (base 10 ascii representation) + or o RATIO + or o single ascii character + or o generic ascii string + + RATIO consists of + o numerator (integer) + o ':' (a colon) + o denominator (integer) + + + The currently supported tags for the STREAM-HEADER: + W - [integer] frame width, pixels, should be > 0 + H - [integer] frame height, pixels, should be > 0 + I - [char] interlacing: p - progressive (none) + t - top-field-first + b - bottom-field-first + ? - unknown + F - [ratio] frame-rate, 0:0 == unknown + A - [ratio] sample (pixel) aspect ratio, 0:0 == unknown + X - [character string] 'metadata' (unparsed, but passed around) + + The currently supported tags for the FRAME-HEADER: + X - character string 'metadata' (unparsed, but passed around) + + ************************************************************************ + ************************************************************************/ + +#endif /* __YUV4MPEG_H__ */ + + diff --git a/libmpdemux/yuv4mpeg_intern.h b/libmpdemux/yuv4mpeg_intern.h new file mode 100644 index 0000000000..805854fbc2 --- /dev/null +++ b/libmpdemux/yuv4mpeg_intern.h @@ -0,0 +1,78 @@ +/* + * yuv4mpeg_intern.h: Internal constants for "new" YUV4MPEG streams + * + * Copyright (C) 2001 Andrew Stevens <andrew.stevens@philips.com> + * + * This file is part of the lavtools package (mjpeg.sourceforge.net). + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of version 2 of the GNU General Public License + * as published by the Free Software Foundation. + * + * This program 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 General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. + */ + +#ifndef __YUV4MPEG_INTERN_H__ +#define __YUV4MPEG_INTERN_H__ + + +#define Y4M_MAGIC "YUV4MPEG2" +#define Y4M_FRAME_MAGIC "FRAME" + +#define Y4M_DELIM " " /* single-character(space) separating tagged fields */ + +#define Y4M_LINE_MAX 256 /* max number of characters in a header line + (including the '\n', but not the '\0') */ + + +/* standard framerate ratios */ +#define Y4M_FPS_UNKNOWN { 0, 0 } +#define Y4M_FPS_NTSC_FILM { 24000, 1001 } +#define Y4M_FPS_FILM { 24, 1 } +#define Y4M_FPS_PAL { 25, 1 } +#define Y4M_FPS_NTSC { 30000, 1001 } +#define Y4M_FPS_30 { 30, 1 } +#define Y4M_FPS_PAL_FIELD { 50, 1 } +#define Y4M_FPS_NTSC_FIELD { 60000, 1001 } +#define Y4M_FPS_60 { 60, 1 } + +/* standard sample/pixel aspect ratios */ +#define Y4M_SAR_UNKNOWN { 0, 0 } +#define Y4M_SAR_SQUARE { 1, 1 } +#define Y4M_SAR_NTSC_CCIR601 { 10, 11 } +#define Y4M_SAR_NTSC_16_9 { 40, 33 } +#define Y4M_SAR_NTSC_SVCD_4_3 { 15, 11 } +#define Y4M_SAR_NTSC_SVCD_16_9 { 20, 11 } +#define Y4M_SAR_PAL_CCIR601 { 59, 54 } +#define Y4M_SAR_PAL_16_9 { 118, 81 } +#define Y4M_SAR_PAL_SVCD_4_3 { 59, 36 } +#define Y4M_SAR_PAL_SVCD_16_9 { 59, 27 } + +#define Y4M_SAR_MPEG1_1 Y4M_SAR_SQUARE +#define Y4M_SAR_MPEG1_2 { 10000, 6735 } +#define Y4M_SAR_MPEG1_3 { 10000, 7031 } /* Anamorphic 16:9 PAL */ +#define Y4M_SAR_MPEG1_4 { 10000, 7615 } +#define Y4M_SAR_MPEG1_5 { 10000, 8055 } +#define Y4M_SAR_MPEG1_6 { 10000, 8437 } /* Anamorphic 16:9 NTSC */ +#define Y4M_SAR_MPEG1_7 { 10000, 8935 } +#define Y4M_SAR_MPEG1_8 { 10000, 9375 } /* PAL/SECAM 4:3 */ +#define Y4M_SAR_MPEG1_9 { 10000, 9815 } +#define Y4M_SAR_MPEG1_10 { 10000, 10255 } +#define Y4M_SAR_MPEG1_11 { 10000, 10695 } +#define Y4M_SAR_MPEG1_12 { 10000, 11250 } /* NTSC 4:3 */ +#define Y4M_SAR_MPEG1_13 { 10000, 11575 } +#define Y4M_SAR_MPEG1_14 { 10000, 12015 } + +#define Y4M_DAR_MPEG2_1 { 1, 1} +#define Y4M_DAR_MPEG2_2 { 4, 3 } +#define Y4M_DAR_MPEG2_3 { 16, 9 } +#define Y4M_DAR_MPEG2_4 { 221, 100 } + +#endif __YUV4MPEG_INTERN_H__ diff --git a/libmpdemux/yuv4mpeg_ratio.c b/libmpdemux/yuv4mpeg_ratio.c new file mode 100644 index 0000000000..e4a3d5a3a6 --- /dev/null +++ b/libmpdemux/yuv4mpeg_ratio.c @@ -0,0 +1,113 @@ +/* + * yuv4mpeg_ratio.c: Functions for dealing with y4m_ratio_t datatype. + * + * Copyright (C) 2001 Matthew J. Marjanovic <maddog@mir.com> + * + * This file is part of the lavtools packaged (mjpeg.sourceforge.net) + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * This program 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 General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. + * + */ + +#include "config.h" + +#include <string.h> +#include "yuv4mpeg.h" +#include "yuv4mpeg_intern.h" + + +/* useful list of standard framerates */ +const y4m_ratio_t y4m_fps_UNKNOWN = Y4M_FPS_UNKNOWN; +const y4m_ratio_t y4m_fps_NTSC_FILM = Y4M_FPS_NTSC_FILM; +const y4m_ratio_t y4m_fps_FILM = Y4M_FPS_FILM; +const y4m_ratio_t y4m_fps_PAL = Y4M_FPS_PAL; +const y4m_ratio_t y4m_fps_NTSC = Y4M_FPS_NTSC; +const y4m_ratio_t y4m_fps_30 = Y4M_FPS_30; +const y4m_ratio_t y4m_fps_PAL_FIELD = Y4M_FPS_PAL_FIELD; +const y4m_ratio_t y4m_fps_NTSC_FIELD = Y4M_FPS_NTSC_FIELD; +const y4m_ratio_t y4m_fps_60 = Y4M_FPS_60; + +/* useful list of standard pixel aspect ratios */ +const y4m_ratio_t y4m_sar_UNKNOWN = Y4M_SAR_UNKNOWN; +const y4m_ratio_t y4m_sar_SQUARE = Y4M_SAR_SQUARE; +const y4m_ratio_t y4m_sar_NTSC_CCIR601 = Y4M_SAR_NTSC_CCIR601; +const y4m_ratio_t y4m_sar_NTSC_16_9 = Y4M_SAR_NTSC_16_9; +const y4m_ratio_t y4m_sar_NTSC_SVCD_4_3 = Y4M_SAR_NTSC_SVCD_4_3; +const y4m_ratio_t y4m_sar_NTSC_SVCD_16_9 = Y4M_SAR_NTSC_SVCD_16_9; +const y4m_ratio_t y4m_sar_PAL_CCIR601 = Y4M_SAR_PAL_CCIR601; +const y4m_ratio_t y4m_sar_PAL_16_9 = Y4M_SAR_PAL_16_9; +const y4m_ratio_t y4m_sar_PAL_SVCD_4_3 = Y4M_SAR_PAL_SVCD_4_3; +const y4m_ratio_t y4m_sar_PAL_SVCD_16_9 = Y4M_SAR_PAL_SVCD_16_9; + + +/* + * Euler's algorithm for greatest common divisor + */ + +static int gcd(int a, int b) +{ + a = (a >= 0) ? a : -a; + b = (b >= 0) ? b : -b; + + while (b > 0) { + int x = b; + b = a % b; + a = x; + } + return a; +} + + +/************************************************************************* + * + * Remove common factors from a ratio + * + *************************************************************************/ + + +void y4m_ratio_reduce(y4m_ratio_t *r) +{ + int d; + if ((r->n == 0) && (r->d == 0)) return; /* "unknown" */ + d = gcd(r->n, r->d); + r->n /= d; + r->d /= d; +} + + + +/************************************************************************* + * + * Parse "nnn:ddd" into a ratio + * + * returns: Y4M_OK - success + * Y4M_ERR_RANGE - range error + * + *************************************************************************/ + +int y4m_parse_ratio(y4m_ratio_t *r, const char *s) +{ + char *t = strchr(s, ':'); + + if (t == NULL) return Y4M_ERR_RANGE; + r->n = atoi(s); + r->d = atoi(t+1); + if (r->d < 0) return Y4M_ERR_RANGE; + /* 0:0 == unknown, so that is ok, otherwise zero denominator is bad */ + if ((r->d == 0) && (r->n != 0)) return Y4M_ERR_RANGE; + y4m_ratio_reduce(r); + return Y4M_OK; +} + |