mirror of
https://github.com/mpv-player/mpv
synced 2024-12-23 23:32:26 +00:00
66b1d0d001
git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@19620 b3059339-0415-0410-9bf9-f77b7e298cf2
767 lines
20 KiB
C
767 lines
20 KiB
C
/*
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* yuv4mpeg.c: Functions for reading and writing "new" YUV4MPEG streams
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*
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* Copyright (C) 2001 Matthew J. Marjanovic <maddog@mir.com>
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*
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* This file is ripped from the lavtools package (mjpeg.sourceforge.net)
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* Ported to mplayer by Rik Snel <rsnel@cube.dyndns.org>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*
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*/
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#include "config.h"
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#include <unistd.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "yuv4mpeg.h"
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#include "yuv4mpeg_intern.h"
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#include "mp_msg.h"
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static int _y4mparam_allow_unknown_tags = 1; /* default is forgiveness */
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static void *(*_y4m_alloc)(size_t bytes) = malloc;
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static void (*_y4m_free)(void *ptr) = free;
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int y4m_allow_unknown_tags(int yn) {
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int old = _y4mparam_allow_unknown_tags;
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if (yn >= 0) _y4mparam_allow_unknown_tags = (yn) ? 1 : 0;
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return old;
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}
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/*************************************************************************
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*
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* Convenience functions for fd read/write
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*
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* - guaranteed to transfer entire payload (or fail)
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* - returns:
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* 0 on complete success
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* +(# of remaining bytes) on eof (for y4m_read)
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* -(# of rem. bytes) on error (and ERRNO should be set)
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*
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*************************************************************************/
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ssize_t y4m_read(stream_t *s, char *buf, size_t len)
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{
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ssize_t n;
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while (len > 0) {
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n = stream_read(s, buf, len);
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if (n <= 0) {
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/* return amount left to read */
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if (n == 0)
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return len; /* n == 0 --> eof */
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else
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return -len; /* n < 0 --> error */
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}
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buf += n;
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len -= n;
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}
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return 0;
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}
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#if 0 /* not needed */
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ssize_t y4m_write(int fd, char *buf, size_t len)
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{
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ssize_t n;
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while (len > 0) {
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n = write(fd, buf, len);
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if (n < 0) return -len; /* return amount left to write */
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buf += n;
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len -= n;
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}
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return 0;
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}
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#endif
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/*************************************************************************
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*
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* "Extra tags" handling
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*
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*************************************************************************/
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static char *y4m_new_xtag(void)
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{
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return _y4m_alloc(Y4M_MAX_XTAG_SIZE);
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}
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void y4m_init_xtag_list(y4m_xtag_list_t *xtags)
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{
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int i;
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xtags->count = 0;
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for (i = 0; i < Y4M_MAX_XTAGS; i++) {
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xtags->tags[i] = NULL;
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}
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}
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void y4m_fini_xtag_list(y4m_xtag_list_t *xtags)
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{
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int i;
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for (i = 0; i < Y4M_MAX_XTAGS; i++) {
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if (xtags->tags[i] != NULL) {
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_y4m_free(xtags->tags[i]);
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xtags->tags[i] = NULL;
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}
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}
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xtags->count = 0;
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}
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void y4m_copy_xtag_list(y4m_xtag_list_t *dest, const y4m_xtag_list_t *src)
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{
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int i;
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for (i = 0; i < src->count; i++) {
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if (dest->tags[i] == NULL)
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dest->tags[i] = y4m_new_xtag();
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strncpy(dest->tags[i], src->tags[i], Y4M_MAX_XTAG_SIZE);
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}
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dest->count = src->count;
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}
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static int y4m_snprint_xtags(char *s, int maxn, y4m_xtag_list_t *xtags)
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{
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int i, room;
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for (i = 0, room = maxn - 1; i < xtags->count; i++) {
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int n = snprintf(s, room + 1, " %s", xtags->tags[i]);
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if ((n < 0) || (n > room)) return Y4M_ERR_HEADER;
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s += n;
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room -= n;
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}
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s[0] = '\n'; /* finish off header with newline */
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s[1] = '\0'; /* ...and end-of-string */
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return Y4M_OK;
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}
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int y4m_xtag_count(const y4m_xtag_list_t *xtags)
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{
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return xtags->count;
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}
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const char *y4m_xtag_get(const y4m_xtag_list_t *xtags, int n)
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{
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if (n >= xtags->count)
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return NULL;
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else
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return xtags->tags[n];
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}
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int y4m_xtag_add(y4m_xtag_list_t *xtags, const char *tag)
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{
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if (xtags->count >= Y4M_MAX_XTAGS) return Y4M_ERR_XXTAGS;
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if (xtags->tags[xtags->count] == NULL) {
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xtags->tags[xtags->count] = y4m_new_xtag();
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}
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strncpy(xtags->tags[xtags->count], tag, Y4M_MAX_XTAG_SIZE);
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(xtags->count)++;
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return Y4M_OK;
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}
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int y4m_xtag_remove(y4m_xtag_list_t *xtags, int n)
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{
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int i;
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char *q;
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if ((n < 0) || (n >= xtags->count)) return Y4M_ERR_RANGE;
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q = xtags->tags[n];
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for (i = n; i < (xtags->count - 1); i++)
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xtags->tags[i] = xtags->tags[i+1];
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xtags->tags[i] = q;
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(xtags->count)--;
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return Y4M_OK;
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}
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int y4m_xtag_clearlist(y4m_xtag_list_t *xtags)
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{
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xtags->count = 0;
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return Y4M_OK;
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}
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int y4m_xtag_addlist(y4m_xtag_list_t *dest, const y4m_xtag_list_t *src)
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{
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int i, j;
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if ((dest->count + src->count) > Y4M_MAX_XTAGS) return Y4M_ERR_XXTAGS;
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for (i = dest->count, j = 0;
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j < src->count;
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i++, j++) {
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if (dest->tags[i] == NULL)
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dest->tags[i] = y4m_new_xtag();
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strncpy(dest->tags[i], src->tags[i], Y4M_MAX_XTAG_SIZE);
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}
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dest->count += src->count;
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return Y4M_OK;
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}
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/*************************************************************************
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*
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* Creators/destructors for y4m_*_info_t structures
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*
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*************************************************************************/
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void y4m_init_stream_info(y4m_stream_info_t *info)
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{
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if (info == NULL) return;
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/* initialize info */
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info->width = Y4M_UNKNOWN;
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info->height = Y4M_UNKNOWN;
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info->interlace = Y4M_UNKNOWN;
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info->framerate = y4m_fps_UNKNOWN;
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info->sampleaspect = y4m_sar_UNKNOWN;
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y4m_init_xtag_list(&(info->x_tags));
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}
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void y4m_copy_stream_info(y4m_stream_info_t *dest, y4m_stream_info_t *src)
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{
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if ((dest == NULL) || (src == NULL)) return;
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/* copy info */
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dest->width = src->width;
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dest->height = src->height;
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dest->interlace = src->interlace;
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dest->framerate = src->framerate;
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dest->sampleaspect = src->sampleaspect;
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y4m_copy_xtag_list(&(dest->x_tags), &(src->x_tags));
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}
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void y4m_fini_stream_info(y4m_stream_info_t *info)
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{
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if (info == NULL) return;
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y4m_fini_xtag_list(&(info->x_tags));
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}
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void y4m_si_set_width(y4m_stream_info_t *si, int width)
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{
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si->width = width;
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si->framelength = (si->height * si->width) * 3 / 2;
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}
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int y4m_si_get_width(y4m_stream_info_t *si)
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{ return si->width; }
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void y4m_si_set_height(y4m_stream_info_t *si, int height)
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{
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si->height = height;
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si->framelength = (si->height * si->width) * 3 / 2;
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}
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int y4m_si_get_height(y4m_stream_info_t *si)
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{ return si->height; }
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void y4m_si_set_interlace(y4m_stream_info_t *si, int interlace)
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{ si->interlace = interlace; }
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int y4m_si_get_interlace(y4m_stream_info_t *si)
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{ return si->interlace; }
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void y4m_si_set_framerate(y4m_stream_info_t *si, y4m_ratio_t framerate)
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{ si->framerate = framerate; }
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y4m_ratio_t y4m_si_get_framerate(y4m_stream_info_t *si)
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{ return si->framerate; }
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void y4m_si_set_sampleaspect(y4m_stream_info_t *si, y4m_ratio_t sar)
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{ si->sampleaspect = sar; }
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y4m_ratio_t y4m_si_get_sampleaspect(y4m_stream_info_t *si)
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{ return si->sampleaspect; }
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int y4m_si_get_framelength(y4m_stream_info_t *si)
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{ return si->framelength; }
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y4m_xtag_list_t *y4m_si_xtags(y4m_stream_info_t *si)
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{ return &(si->x_tags); }
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void y4m_init_frame_info(y4m_frame_info_t *info)
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{
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if (info == NULL) return;
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/* initialize info */
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y4m_init_xtag_list(&(info->x_tags));
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}
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void y4m_copy_frame_info(y4m_frame_info_t *dest, y4m_frame_info_t *src)
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{
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if ((dest == NULL) || (src == NULL)) return;
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/* copy info */
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y4m_copy_xtag_list(&(dest->x_tags), &(src->x_tags));
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}
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void y4m_fini_frame_info(y4m_frame_info_t *info)
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{
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if (info == NULL) return;
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y4m_fini_xtag_list(&(info->x_tags));
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}
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/*************************************************************************
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*
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* Tag parsing
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*
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*************************************************************************/
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int y4m_parse_stream_tags(char *s, y4m_stream_info_t *i)
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{
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char *token, *value;
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char tag;
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int err;
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/* parse fields */
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for (token = strtok(s, Y4M_DELIM);
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token != NULL;
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token = strtok(NULL, Y4M_DELIM)) {
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if (token[0] == '\0') continue; /* skip empty strings */
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tag = token[0];
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value = token + 1;
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switch (tag) {
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case 'W': /* width */
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i->width = atoi(value);
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if (i->width <= 0) return Y4M_ERR_RANGE;
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break;
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case 'H': /* height */
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i->height = atoi(value);
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if (i->height <= 0) return Y4M_ERR_RANGE;
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break;
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case 'F': /* frame rate (fps) */
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if ((err = y4m_parse_ratio(&(i->framerate), value)) != Y4M_OK)
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return err;
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if (i->framerate.n < 0) return Y4M_ERR_RANGE;
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break;
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case 'I': /* interlacing */
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switch (value[0]) {
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case 'p': i->interlace = Y4M_ILACE_NONE; break;
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case 't': i->interlace = Y4M_ILACE_TOP_FIRST; break;
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case 'b': i->interlace = Y4M_ILACE_BOTTOM_FIRST; break;
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case '?':
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default:
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i->interlace = Y4M_UNKNOWN; break;
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}
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break;
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case 'A': /* sample (pixel) aspect ratio */
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if ((err = y4m_parse_ratio(&(i->sampleaspect), value)) != Y4M_OK)
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return err;
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if (i->sampleaspect.n < 0) return Y4M_ERR_RANGE;
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break;
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case 'X': /* 'X' meta-tag */
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if ((err = y4m_xtag_add(&(i->x_tags), token)) != Y4M_OK) return err;
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break;
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default:
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/* possible error on unknown options */
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if (_y4mparam_allow_unknown_tags) {
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/* unknown tags ok: store in xtag list and warn... */
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if ((err = y4m_xtag_add(&(i->x_tags), token)) != Y4M_OK) return err;
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mp_msg(MSGT_DEMUX, MSGL_WARN, "Unknown stream tag encountered: '%s'\n", token);
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} else {
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/* unknown tags are *not* ok */
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return Y4M_ERR_BADTAG;
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}
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break;
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}
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}
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/* Error checking... width and height must be known since we can't
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* parse without them
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*/
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if( i->width == Y4M_UNKNOWN || i->height == Y4M_UNKNOWN )
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return Y4M_ERR_HEADER;
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/* ta da! done. */
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return Y4M_OK;
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}
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static int y4m_parse_frame_tags(char *s, y4m_frame_info_t *i)
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{
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char *token, *value;
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char tag;
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int err;
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/* parse fields */
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for (token = strtok(s, Y4M_DELIM);
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token != NULL;
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token = strtok(NULL, Y4M_DELIM)) {
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if (token[0] == '\0') continue; /* skip empty strings */
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tag = token[0];
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value = token + 1;
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switch (tag) {
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case 'X': /* 'X' meta-tag */
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if ((err = y4m_xtag_add(&(i->x_tags), token)) != Y4M_OK) return err;
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break;
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default:
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/* possible error on unknown options */
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if (_y4mparam_allow_unknown_tags) {
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/* unknown tags ok: store in xtag list and warn... */
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if ((err = y4m_xtag_add(&(i->x_tags), token)) != Y4M_OK) return err;
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mp_msg(MSGT_DEMUX, MSGL_WARN, "Unknown frame tag encountered: '%s'\n", token);
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} else {
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/* unknown tags are *not* ok */
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return Y4M_ERR_BADTAG;
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}
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break;
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}
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}
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/* ta da! done. */
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return Y4M_OK;
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}
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/*************************************************************************
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*
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* Read/Write stream header
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*
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*************************************************************************/
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int y4m_read_stream_header(stream_t *s, y4m_stream_info_t *i)
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{
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char line[Y4M_LINE_MAX];
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char *p;
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int n;
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int err;
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/* read the header line */
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for (n = 0, p = line; n < Y4M_LINE_MAX; n++, p++) {
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if (y4m_read(s, p, 1))
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return Y4M_ERR_SYSTEM;
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if (*p == '\n') {
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*p = '\0'; /* Replace linefeed by end of string */
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break;
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}
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}
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if (n >= Y4M_LINE_MAX)
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return Y4M_ERR_HEADER;
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/* look for keyword in header */
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if (strncmp(line, Y4M_MAGIC, strlen(Y4M_MAGIC)))
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return Y4M_ERR_MAGIC;
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if ((err = y4m_parse_stream_tags(line + strlen(Y4M_MAGIC), i)) != Y4M_OK)
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return err;
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i->framelength = (i->height * i->width) * 3 / 2;
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return Y4M_OK;
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}
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#if 0
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int y4m_write_stream_header(int fd, y4m_stream_info_t *i)
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{
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char s[Y4M_LINE_MAX+1];
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int n;
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int err;
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y4m_ratio_reduce(&(i->framerate));
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y4m_ratio_reduce(&(i->sampleaspect));
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n = snprintf(s, sizeof(s), "%s W%d H%d F%d:%d I%s A%d:%d",
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Y4M_MAGIC,
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i->width,
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i->height,
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i->framerate.n, i->framerate.d,
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(i->interlace == Y4M_ILACE_NONE) ? "p" :
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(i->interlace == Y4M_ILACE_TOP_FIRST) ? "t" :
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(i->interlace == Y4M_ILACE_BOTTOM_FIRST) ? "b" : "?",
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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";
|
|
}
|
|
}
|
|
|
|
|