mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-12-23 12:43:46 +02:00
6cea494e32
hmm any opinions about GIF support ? Originally committed as revision 385 to svn://svn.ffmpeg.org/ffmpeg/trunk
651 lines
15 KiB
C
651 lines
15 KiB
C
/*
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* Various utilities for ffmpeg system
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* Copyright (c) 2000,2001 Gerard Lantau
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (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., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include "avformat.h"
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#include "tick.h"
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#ifndef CONFIG_WIN32
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#include <unistd.h>
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#include <fcntl.h>
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#include <sys/time.h>
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#include <time.h>
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#else
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#define strcasecmp _stricmp
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#include <sys/types.h>
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#include <sys/timeb.h>
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#endif
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AVFormat *first_format;
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void register_avformat(AVFormat *format)
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{
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AVFormat **p;
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p = &first_format;
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while (*p != NULL) p = &(*p)->next;
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*p = format;
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format->next = NULL;
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}
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int match_ext(const char *filename, const char *extensions)
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{
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const char *ext, *p;
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char ext1[32], *q;
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ext = strrchr(filename, '.');
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if (ext) {
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ext++;
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p = extensions;
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for(;;) {
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q = ext1;
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while (*p != '\0' && *p != ',')
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*q++ = *p++;
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*q = '\0';
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if (!strcasecmp(ext1, ext))
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return 1;
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if (*p == '\0')
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break;
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p++;
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}
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}
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return 0;
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}
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AVFormat *guess_format(const char *short_name, const char *filename, const char *mime_type)
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{
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AVFormat *fmt, *fmt_found;
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int score_max, score;
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/* find the proper file type */
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fmt_found = NULL;
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score_max = 0;
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fmt = first_format;
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while (fmt != NULL) {
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score = 0;
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if (fmt->name && short_name && !strcmp(fmt->name, short_name))
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score += 100;
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if (fmt->mime_type && mime_type && !strcmp(fmt->mime_type, mime_type))
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score += 10;
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if (filename && fmt->extensions &&
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match_ext(filename, fmt->extensions)) {
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score += 5;
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}
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if (score > score_max) {
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score_max = score;
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fmt_found = fmt;
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}
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fmt = fmt->next;
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}
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return fmt_found;
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}
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/* return TRUE if val is a prefix of str. If it returns TRUE, ptr is
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set to the next character in 'str' after the prefix */
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int strstart(const char *str, const char *val, const char **ptr)
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{
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const char *p, *q;
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p = str;
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q = val;
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while (*q != '\0') {
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if (*p != *q)
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return 0;
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p++;
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q++;
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}
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if (ptr)
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*ptr = p;
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return 1;
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}
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void nstrcpy(char *buf, int buf_size, const char *str)
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{
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int c;
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char *q = buf;
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for(;;) {
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c = *str++;
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if (c == 0 || q >= buf + buf_size - 1)
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break;
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*q++ = c;
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}
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*q = '\0';
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}
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void register_all(void)
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{
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avcodec_init();
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avcodec_register_all();
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register_avformat(&mp2_format);
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register_avformat(&ac3_format);
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register_avformat(&mpeg_mux_format);
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register_avformat(&mpeg1video_format);
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register_avformat(&mjpeg_format);
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register_avformat(&h263_format);
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register_avformat(&rm_format);
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register_avformat(&asf_format);
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register_avformat(&avi_format);
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register_avformat(&mov_format);
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register_avformat(&mp4_format);
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register_avformat(&mpjpeg_format);
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register_avformat(&jpeg_format);
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register_avformat(&single_jpeg_format);
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register_avformat(&swf_format);
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register_avformat(&gif_format);
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register_avformat(&au_format);
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register_avformat(&wav_format);
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register_avformat(&pcm_s16le_format);
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register_avformat(&pcm_s16be_format);
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register_avformat(&pcm_u16le_format);
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register_avformat(&pcm_u16be_format);
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register_avformat(&pcm_s8_format);
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register_avformat(&pcm_u8_format);
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register_avformat(&pcm_mulaw_format);
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register_avformat(&pcm_alaw_format);
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register_avformat(&rawvideo_format);
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#ifndef CONFIG_WIN32
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register_avformat(&ffm_format);
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#endif
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register_avformat(&pgm_format);
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register_avformat(&ppm_format);
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register_avformat(&pgmyuv_format);
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register_avformat(&imgyuv_format);
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register_avformat(&pgmpipe_format);
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register_avformat(&pgmyuvpipe_format);
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register_avformat(&ppmpipe_format);
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#ifdef CONFIG_GRAB
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register_avformat(&video_grab_device_format);
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register_avformat(&audio_device_format);
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#endif
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/* file protocols */
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register_protocol(&file_protocol);
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register_protocol(&pipe_protocol);
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#ifndef CONFIG_WIN32
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register_protocol(&udp_protocol);
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register_protocol(&http_protocol);
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#endif
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}
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/* memory handling */
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int av_new_packet(AVPacket *pkt, int size)
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{
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pkt->data = malloc(size);
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if (!pkt->data)
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return -ENOMEM;
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pkt->size = size;
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/* sane state */
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pkt->pts = 0;
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pkt->stream_index = 0;
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pkt->flags = 0;
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return 0;
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}
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void av_free_packet(AVPacket *pkt)
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{
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free(pkt->data);
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/* fail safe */
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pkt->data = NULL;
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pkt->size = 0;
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}
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/* fifo handling */
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int fifo_init(FifoBuffer *f, int size)
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{
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f->buffer = malloc(size);
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if (!f->buffer)
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return -1;
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f->end = f->buffer + size;
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f->wptr = f->rptr = f->buffer;
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return 0;
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}
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void fifo_free(FifoBuffer *f)
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{
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free(f->buffer);
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}
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int fifo_size(FifoBuffer *f, UINT8 *rptr)
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{
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int size;
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if (f->wptr >= rptr) {
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size = f->wptr - rptr;
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} else {
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size = (f->end - rptr) + (f->wptr - f->buffer);
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}
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return size;
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}
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/* get data from the fifo (return -1 if not enough data) */
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int fifo_read(FifoBuffer *f, UINT8 *buf, int buf_size, UINT8 **rptr_ptr)
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{
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UINT8 *rptr = *rptr_ptr;
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int size, len;
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if (f->wptr >= rptr) {
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size = f->wptr - rptr;
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} else {
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size = (f->end - rptr) + (f->wptr - f->buffer);
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}
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if (size < buf_size)
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return -1;
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while (buf_size > 0) {
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len = f->end - rptr;
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if (len > buf_size)
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len = buf_size;
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memcpy(buf, rptr, len);
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buf += len;
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rptr += len;
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if (rptr >= f->end)
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rptr = f->buffer;
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buf_size -= len;
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}
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*rptr_ptr = rptr;
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return 0;
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}
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void fifo_write(FifoBuffer *f, UINT8 *buf, int size, UINT8 **wptr_ptr)
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{
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int len;
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UINT8 *wptr;
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wptr = *wptr_ptr;
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while (size > 0) {
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len = f->end - wptr;
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if (len > size)
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len = size;
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memcpy(wptr, buf, len);
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wptr += len;
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if (wptr >= f->end)
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wptr = f->buffer;
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buf += len;
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size -= len;
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}
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*wptr_ptr = wptr;
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}
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/* media file handling.
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'filename' is the filename to open.
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'format_name' is used to force the file format (NULL if auto guess).
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'buf_size' is the optional buffer size (zero if default is OK).
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'ap' are additionnal parameters needed when opening the file (NULL if default).
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*/
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AVFormatContext *av_open_input_file(const char *filename,
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const char *format_name,
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int buf_size,
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AVFormatParameters *ap)
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{
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AVFormat *fmt;
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AVFormatContext *ic = NULL;
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int err;
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ic = av_mallocz(sizeof(AVFormatContext));
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if (!ic)
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goto fail;
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/* find format */
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if (format_name != NULL) {
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fmt = guess_format(format_name, NULL, NULL);
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} else {
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fmt = guess_format(NULL, filename, NULL);
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}
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if (!fmt || !fmt->read_header) {
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return NULL;
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}
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ic->format = fmt;
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/* if no file needed do not try to open one */
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if (!(fmt->flags & AVFMT_NOFILE)) {
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if (url_fopen(&ic->pb, filename, URL_RDONLY) < 0)
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goto fail;
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if (buf_size > 0) {
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url_setbufsize(&ic->pb, buf_size);
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}
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}
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err = ic->format->read_header(ic, ap);
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if (err < 0) {
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if (!(fmt->flags & AVFMT_NOFILE)) {
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url_fclose(&ic->pb);
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}
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goto fail;
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}
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return ic;
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fail:
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if (ic)
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free(ic);
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return NULL;
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}
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int av_read_packet(AVFormatContext *s, AVPacket *pkt)
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{
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AVPacketList *pktl;
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pktl = s->packet_buffer;
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if (pktl) {
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/* read packet from packet buffer, if there is data */
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*pkt = pktl->pkt;
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s->packet_buffer = pktl->next;
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free(pktl);
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return 0;
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} else {
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return s->format->read_packet(s, pkt);
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}
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}
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void av_close_input_file(AVFormatContext *s)
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{
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int i;
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if (s->format->read_close)
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s->format->read_close(s);
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for(i=0;i<s->nb_streams;i++) {
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free(s->streams[i]);
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}
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if (s->packet_buffer) {
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AVPacketList *p, *p1;
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p = s->packet_buffer;
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while (p != NULL) {
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p1 = p->next;
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av_free_packet(&p->pkt);
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free(p);
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p = p1;
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}
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s->packet_buffer = NULL;
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}
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if (!(s->format->flags & AVFMT_NOFILE)) {
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url_fclose(&s->pb);
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}
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free(s);
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}
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int av_write_packet(AVFormatContext *s, AVPacket *pkt, int force_pts)
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{
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/* XXX: currently, an emulation because internal API must change */
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return s->format->write_packet(s, pkt->stream_index, pkt->data, pkt->size, force_pts);
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}
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/* "user interface" functions */
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void dump_format(AVFormatContext *ic,
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int index,
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const char *url,
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int is_output)
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{
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int i;
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char buf[256];
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fprintf(stderr, "%s #%d, %s, %s '%s':\n",
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is_output ? "Output" : "Input",
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index, ic->format->name,
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is_output ? "to" : "from", url);
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for(i=0;i<ic->nb_streams;i++) {
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AVStream *st = ic->streams[i];
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avcodec_string(buf, sizeof(buf), &st->codec, is_output);
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fprintf(stderr, " Stream #%d.%d: %s\n", index, i, buf);
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}
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}
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typedef struct {
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const char *str;
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int width, height;
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} SizeEntry;
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static SizeEntry sizes[] = {
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{ "sqcif", 128, 96 },
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{ "qcif", 176, 144 },
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{ "cif", 352, 288 },
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{ "4cif", 704, 576 },
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};
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int parse_image_size(int *width_ptr, int *height_ptr, const char *str)
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{
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int i;
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int n = sizeof(sizes) / sizeof(SizeEntry);
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const char *p;
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int frame_width = 0, frame_height = 0;
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for(i=0;i<n;i++) {
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if (!strcmp(sizes[i].str, str)) {
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frame_width = sizes[i].width;
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frame_height = sizes[i].height;
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break;
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}
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}
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if (i == n) {
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p = str;
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frame_width = strtol(p, (char **)&p, 10);
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if (*p)
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p++;
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frame_height = strtol(p, (char **)&p, 10);
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}
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if (frame_width <= 0 || frame_height <= 0)
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return -1;
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*width_ptr = frame_width;
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*height_ptr = frame_height;
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return 0;
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}
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INT64 gettime(void)
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{
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#ifdef CONFIG_WIN32
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struct _timeb tb;
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_ftime(&tb);
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return ((INT64)tb.time * INT64_C(1000) + (INT64)tb.millitm) * INT64_C(1000);
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#else
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struct timeval tv;
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gettimeofday(&tv,NULL);
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return (INT64)tv.tv_sec * 1000000 + tv.tv_usec;
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#endif
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}
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/* syntax: [YYYY-MM-DD ][[HH:]MM:]SS[.m...] . Return the date in micro seconds since 1970 */
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INT64 parse_date(const char *datestr, int duration)
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{
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const char *p;
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INT64 t;
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int sec;
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p = datestr;
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if (!duration) {
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static const UINT8 months[12] = { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };
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int year, month, day, i;
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if (strlen(p) >= 5 && p[4] == '-') {
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year = strtol(p, (char **)&p, 10);
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if (*p)
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p++;
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month = strtol(p, (char **)&p, 10) - 1;
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if (*p)
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p++;
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day = strtol(p, (char **)&p, 10) - 1;
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if (*p)
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p++;
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day += (year - 1970) * 365;
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/* if >= March, take February of current year into account too */
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if (month >= 2)
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year++;
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for(i=1970;i<year;i++) {
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if ((i % 100) == 0) {
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if ((i % 400) == 0) day++;
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} else if ((i % 4) == 0) {
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day++;
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}
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}
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for(i=0;i<month;i++)
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day += months[i];
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} else {
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day = (time(NULL) / (3600 * 24));
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}
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t = day * (3600 * 24);
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} else {
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t = 0;
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}
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sec = 0;
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for(;;) {
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int val;
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val = strtol(p, (char **)&p, 10);
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sec = sec * 60 + val;
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if (*p != ':')
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break;
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p++;
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}
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t = (t + sec) * 1000000;
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if (*p == '.') {
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int val, n;
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p++;
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n = strlen(p);
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if (n > 6)
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n = 6;
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val = strtol(p, NULL, 10);
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while (n < 6) {
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val = val * 10;
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n++;
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}
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t += val;
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}
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return t;
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}
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/* syntax: '?tag1=val1&tag2=val2...'. No URL decoding is done. Return
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1 if found */
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int find_info_tag(char *arg, int arg_size, const char *tag1, const char *info)
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{
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const char *p;
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char tag[128], *q;
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p = info;
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if (*p == '?')
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p++;
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for(;;) {
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q = tag;
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while (*p != '\0' && *p != '=' && *p != '&') {
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if ((q - tag) < sizeof(tag) - 1)
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*q++ = *p;
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p++;
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}
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*q = '\0';
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q = arg;
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if (*p == '=') {
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p++;
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while (*p != '&' && *p != '\0') {
|
|
if ((q - arg) < arg_size - 1)
|
|
*q++ = *p;
|
|
p++;
|
|
}
|
|
*q = '\0';
|
|
}
|
|
if (!strcmp(tag, tag1))
|
|
return 1;
|
|
if (*p != '&')
|
|
break;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/* Return in 'buf' the path with '%d' replaced by number. Also handles
|
|
the '%0nd' format where 'n' is the total number of digits and
|
|
'%%'. Return 0 if OK, and -1 if format error */
|
|
int get_frame_filename(char *buf, int buf_size,
|
|
const char *path, int number)
|
|
{
|
|
const char *p;
|
|
char *q, buf1[20];
|
|
int nd, len, c, percentd_found;
|
|
|
|
q = buf;
|
|
p = path;
|
|
percentd_found = 0;
|
|
for(;;) {
|
|
c = *p++;
|
|
if (c == '\0')
|
|
break;
|
|
if (c == '%') {
|
|
nd = 0;
|
|
while (*p >= '0' && *p <= '9') {
|
|
nd = nd * 10 + *p++ - '0';
|
|
}
|
|
c = *p++;
|
|
switch(c) {
|
|
case '%':
|
|
goto addchar;
|
|
case 'd':
|
|
if (percentd_found)
|
|
goto fail;
|
|
percentd_found = 1;
|
|
snprintf(buf1, sizeof(buf1), "%0*d", nd, number);
|
|
len = strlen(buf1);
|
|
if ((q - buf + len) > buf_size - 1)
|
|
goto fail;
|
|
memcpy(q, buf1, len);
|
|
q += len;
|
|
break;
|
|
default:
|
|
goto fail;
|
|
}
|
|
} else {
|
|
addchar:
|
|
if ((q - buf) < buf_size - 1)
|
|
*q++ = c;
|
|
}
|
|
}
|
|
if (!percentd_found)
|
|
goto fail;
|
|
*q = '\0';
|
|
return 0;
|
|
fail:
|
|
*q = '\0';
|
|
return -1;
|
|
}
|
|
|
|
static int gcd(INT64 a, INT64 b)
|
|
{
|
|
INT64 c;
|
|
|
|
while (1) {
|
|
c = a % b;
|
|
if (c == 0)
|
|
return b;
|
|
a = b;
|
|
b = c;
|
|
}
|
|
}
|
|
|
|
void ticker_init(Ticker *tick, INT64 inrate, INT64 outrate)
|
|
{
|
|
int g;
|
|
|
|
g = gcd(inrate, outrate);
|
|
inrate /= g;
|
|
outrate /= g;
|
|
|
|
tick->value = -outrate/2;
|
|
|
|
tick->inrate = inrate;
|
|
tick->outrate = outrate;
|
|
tick->div = tick->outrate / tick->inrate;
|
|
tick->mod = tick->outrate % tick->inrate;
|
|
}
|