mirror of
https://git.ffmpeg.org/ffmpeg.git
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510 lines
16 KiB
C
510 lines
16 KiB
C
/*
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* Image format
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* Copyright (c) 2000, 2001, 2002 Fabrice Bellard
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* Copyright (c) 2004 Michael Niedermayer
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg 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 GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; 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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#include <sys/stat.h>
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#include "libavutil/avstring.h"
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#include "libavutil/log.h"
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#include "libavutil/opt.h"
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#include "libavutil/pixdesc.h"
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#include "libavutil/parseutils.h"
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#include "avformat.h"
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#include "internal.h"
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#if HAVE_GLOB
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#include <glob.h>
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/* Locally define as 0 (bitwise-OR no-op) any missing glob options that
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are non-posix glibc/bsd extensions. */
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#ifndef GLOB_NOMAGIC
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#define GLOB_NOMAGIC 0
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#endif
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#ifndef GLOB_BRACE
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#define GLOB_BRACE 0
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#endif
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#endif /* HAVE_GLOB */
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typedef struct {
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const AVClass *class; /**< Class for private options. */
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int img_first;
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int img_last;
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int img_number;
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int64_t pts;
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int img_count;
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int is_pipe;
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int split_planes; /**< use independent file for each Y, U, V plane */
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char path[1024];
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char *pixel_format; /**< Set by a private option. */
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int width, height; /**< Set by a private option. */
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AVRational framerate; /**< Set by a private option. */
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int loop;
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enum { PT_GLOB_SEQUENCE, PT_GLOB, PT_SEQUENCE } pattern_type;
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int use_glob;
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#if HAVE_GLOB
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glob_t globstate;
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#endif
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int start_number;
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int start_number_range;
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int frame_size;
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int ts_from_file;
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} VideoDemuxData;
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static const int sizes[][2] = {
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{ 640, 480 },
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{ 720, 480 },
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{ 720, 576 },
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{ 352, 288 },
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{ 352, 240 },
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{ 160, 128 },
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{ 512, 384 },
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{ 640, 352 },
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{ 640, 240 },
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};
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static int infer_size(int *width_ptr, int *height_ptr, int size)
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{
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int i;
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for (i = 0; i < FF_ARRAY_ELEMS(sizes); i++) {
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if ((sizes[i][0] * sizes[i][1]) == size) {
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*width_ptr = sizes[i][0];
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*height_ptr = sizes[i][1];
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return 0;
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}
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}
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return -1;
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}
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static int is_glob(const char *path)
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{
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#if HAVE_GLOB
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size_t span = 0;
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const char *p = path;
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while (p = strchr(p, '%')) {
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if (*(++p) == '%') {
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++p;
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continue;
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}
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if (span = strspn(p, "*?[]{}"))
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break;
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}
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/* Did we hit a glob char or get to the end? */
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return span != 0;
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#else
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return 0;
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#endif
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}
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/**
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* Get index range of image files matched by path.
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*
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* @param pfirst_index pointer to index updated with the first number in the range
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* @param plast_index pointer to index updated with the last number in the range
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* @param path path which has to be matched by the image files in the range
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* @param start_index minimum accepted value for the first index in the range
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* @return -1 if no image file could be found
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*/
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static int find_image_range(int *pfirst_index, int *plast_index,
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const char *path, int start_index, int start_index_range)
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{
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char buf[1024];
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int range, last_index, range1, first_index;
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/* find the first image */
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for (first_index = start_index; first_index < start_index + start_index_range; first_index++) {
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if (av_get_frame_filename(buf, sizeof(buf), path, first_index) < 0) {
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*pfirst_index =
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*plast_index = 1;
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if (avio_check(buf, AVIO_FLAG_READ) > 0)
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return 0;
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return -1;
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}
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if (avio_check(buf, AVIO_FLAG_READ) > 0)
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break;
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}
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if (first_index == start_index + start_index_range)
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goto fail;
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/* find the last image */
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last_index = first_index;
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for (;;) {
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range = 0;
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for (;;) {
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if (!range)
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range1 = 1;
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else
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range1 = 2 * range;
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if (av_get_frame_filename(buf, sizeof(buf), path,
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last_index + range1) < 0)
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goto fail;
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if (avio_check(buf, AVIO_FLAG_READ) <= 0)
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break;
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range = range1;
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/* just in case... */
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if (range >= (1 << 30))
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goto fail;
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}
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/* we are sure than image last_index + range exists */
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if (!range)
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break;
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last_index += range;
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}
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*pfirst_index = first_index;
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*plast_index = last_index;
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return 0;
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fail:
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return -1;
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}
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static int img_read_probe(AVProbeData *p)
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{
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if (p->filename && ff_guess_image2_codec(p->filename)) {
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if (av_filename_number_test(p->filename))
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return AVPROBE_SCORE_MAX;
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else if (is_glob(p->filename))
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return AVPROBE_SCORE_MAX;
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else if (av_match_ext(p->filename, "raw") || av_match_ext(p->filename, "gif"))
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return 5;
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else
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return AVPROBE_SCORE_EXTENSION;
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}
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return 0;
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}
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static int img_read_header(AVFormatContext *s1)
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{
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VideoDemuxData *s = s1->priv_data;
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int first_index, last_index;
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AVStream *st;
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enum AVPixelFormat pix_fmt = AV_PIX_FMT_NONE;
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s1->ctx_flags |= AVFMTCTX_NOHEADER;
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st = avformat_new_stream(s1, NULL);
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if (!st) {
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return AVERROR(ENOMEM);
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}
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if (s->pixel_format &&
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(pix_fmt = av_get_pix_fmt(s->pixel_format)) == AV_PIX_FMT_NONE) {
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av_log(s1, AV_LOG_ERROR, "No such pixel format: %s.\n",
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s->pixel_format);
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return AVERROR(EINVAL);
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}
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av_strlcpy(s->path, s1->filename, sizeof(s->path));
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s->img_number = 0;
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s->img_count = 0;
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/* find format */
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if (s1->iformat->flags & AVFMT_NOFILE)
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s->is_pipe = 0;
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else {
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s->is_pipe = 1;
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st->need_parsing = AVSTREAM_PARSE_FULL;
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}
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if (s->ts_from_file)
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avpriv_set_pts_info(st, 64, 1, 1);
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else
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avpriv_set_pts_info(st, 64, s->framerate.den, s->framerate.num);
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if (s->width && s->height) {
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st->codec->width = s->width;
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st->codec->height = s->height;
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}
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if (!s->is_pipe) {
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if (s->pattern_type == PT_GLOB_SEQUENCE) {
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s->use_glob = is_glob(s->path);
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if (s->use_glob) {
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char *p = s->path, *q, *dup;
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int gerr;
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av_log(s1, AV_LOG_WARNING, "Pattern type 'glob_sequence' is deprecated: "
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"use pattern_type 'glob' instead\n");
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#if HAVE_GLOB
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dup = q = av_strdup(p);
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while (*q) {
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/* Do we have room for the next char and a \ insertion? */
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if ((p - s->path) >= (sizeof(s->path) - 2))
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break;
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if (*q == '%' && strspn(q + 1, "%*?[]{}"))
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++q;
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else if (strspn(q, "\\*?[]{}"))
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*p++ = '\\';
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*p++ = *q++;
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}
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*p = 0;
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av_free(dup);
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gerr = glob(s->path, GLOB_NOCHECK|GLOB_BRACE|GLOB_NOMAGIC, NULL, &s->globstate);
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if (gerr != 0) {
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return AVERROR(ENOENT);
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}
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first_index = 0;
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last_index = s->globstate.gl_pathc - 1;
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#endif
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}
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}
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if ((s->pattern_type == PT_GLOB_SEQUENCE && !s->use_glob) || s->pattern_type == PT_SEQUENCE) {
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if (find_image_range(&first_index, &last_index, s->path,
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s->start_number, s->start_number_range) < 0) {
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av_log(s1, AV_LOG_ERROR,
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"Could find no file with path '%s' and index in the range %d-%d\n",
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s->path, s->start_number, s->start_number + s->start_number_range - 1);
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return AVERROR(ENOENT);
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}
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} else if (s->pattern_type == PT_GLOB) {
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#if HAVE_GLOB
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int gerr;
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gerr = glob(s->path, GLOB_NOCHECK|GLOB_BRACE|GLOB_NOMAGIC, NULL, &s->globstate);
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if (gerr != 0) {
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return AVERROR(ENOENT);
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}
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first_index = 0;
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last_index = s->globstate.gl_pathc - 1;
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s->use_glob = 1;
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#else
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av_log(s1, AV_LOG_ERROR,
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"Pattern type 'glob' was selected but globbing "
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"is not supported by this libavformat build\n");
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return AVERROR(ENOSYS);
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#endif
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} else if (s->pattern_type != PT_GLOB_SEQUENCE) {
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av_log(s1, AV_LOG_ERROR,
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"Unknown value '%d' for pattern_type option\n", s->pattern_type);
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return AVERROR(EINVAL);
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}
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s->img_first = first_index;
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s->img_last = last_index;
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s->img_number = first_index;
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/* compute duration */
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if (!s->ts_from_file) {
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st->start_time = 0;
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st->duration = last_index - first_index + 1;
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}
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}
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if (s1->video_codec_id) {
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st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
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st->codec->codec_id = s1->video_codec_id;
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} else if (s1->audio_codec_id) {
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st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
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st->codec->codec_id = s1->audio_codec_id;
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} else {
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const char *str = strrchr(s->path, '.');
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s->split_planes = str && !av_strcasecmp(str + 1, "y");
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st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
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st->codec->codec_id = ff_guess_image2_codec(s->path);
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if (st->codec->codec_id == AV_CODEC_ID_LJPEG)
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st->codec->codec_id = AV_CODEC_ID_MJPEG;
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}
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if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO &&
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pix_fmt != AV_PIX_FMT_NONE)
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st->codec->pix_fmt = pix_fmt;
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return 0;
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}
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static int img_read_packet(AVFormatContext *s1, AVPacket *pkt)
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{
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VideoDemuxData *s = s1->priv_data;
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char filename_bytes[1024];
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char *filename = filename_bytes;
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int i;
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int size[3] = { 0 }, ret[3] = { 0 };
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AVIOContext *f[3] = { NULL };
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AVCodecContext *codec = s1->streams[0]->codec;
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if (!s->is_pipe) {
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/* loop over input */
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if (s->loop && s->img_number > s->img_last) {
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s->img_number = s->img_first;
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}
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if (s->img_number > s->img_last)
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return AVERROR_EOF;
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if (s->use_glob) {
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#if HAVE_GLOB
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filename = s->globstate.gl_pathv[s->img_number];
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#endif
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} else {
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if (av_get_frame_filename(filename_bytes, sizeof(filename_bytes),
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s->path,
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s->img_number) < 0 && s->img_number > 1)
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return AVERROR(EIO);
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}
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for (i = 0; i < 3; i++) {
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if (avio_open2(&f[i], filename, AVIO_FLAG_READ,
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&s1->interrupt_callback, NULL) < 0) {
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if (i >= 1)
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break;
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av_log(s1, AV_LOG_ERROR, "Could not open file : %s\n",
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filename);
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return AVERROR(EIO);
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}
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size[i] = avio_size(f[i]);
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if (!s->split_planes)
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break;
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filename[strlen(filename) - 1] = 'U' + i;
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}
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if (codec->codec_id == AV_CODEC_ID_RAWVIDEO && !codec->width)
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infer_size(&codec->width, &codec->height, size[0]);
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} else {
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f[0] = s1->pb;
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if (url_feof(f[0]))
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return AVERROR(EIO);
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if (s->frame_size > 0) {
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size[0] = s->frame_size;
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} else {
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size[0] = 4096;
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}
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}
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if (av_new_packet(pkt, size[0] + size[1] + size[2]) < 0)
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return AVERROR(ENOMEM);
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pkt->stream_index = 0;
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pkt->flags |= AV_PKT_FLAG_KEY;
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if (s->ts_from_file) {
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struct stat img_stat;
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if (stat(filename, &img_stat))
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return AVERROR(EIO);
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pkt->pts = (int64_t)img_stat.st_mtime;
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av_add_index_entry(s1->streams[0], s->img_number, pkt->pts, 0, 0, AVINDEX_KEYFRAME);
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} else if (!s->is_pipe) {
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pkt->pts = s->pts;
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}
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pkt->size = 0;
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for (i = 0; i < 3; i++) {
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if (f[i]) {
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ret[i] = avio_read(f[i], pkt->data + pkt->size, size[i]);
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if (!s->is_pipe)
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avio_close(f[i]);
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if (ret[i] > 0)
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pkt->size += ret[i];
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}
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}
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if (ret[0] <= 0 || ret[1] < 0 || ret[2] < 0) {
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av_free_packet(pkt);
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return AVERROR(EIO); /* signal EOF */
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} else {
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s->img_count++;
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s->img_number++;
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s->pts++;
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return 0;
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}
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}
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static int img_read_close(struct AVFormatContext* s1)
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{
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VideoDemuxData *s = s1->priv_data;
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#if HAVE_GLOB
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if (s->use_glob) {
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globfree(&s->globstate);
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}
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#endif
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return 0;
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}
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static int img_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
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{
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VideoDemuxData *s1 = s->priv_data;
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AVStream *st = s->streams[0];
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if (s1->ts_from_file) {
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int index = av_index_search_timestamp(st, timestamp, flags);
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if(index < 0)
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return -1;
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s1->img_number = st->index_entries[index].pos;
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return 0;
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}
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if (timestamp < 0 || !s1->loop && timestamp > s1->img_last - s1->img_first)
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return -1;
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s1->img_number = timestamp%(s1->img_last - s1->img_first + 1) + s1->img_first;
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s1->pts = timestamp;
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return 0;
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}
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#define OFFSET(x) offsetof(VideoDemuxData, x)
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#define DEC AV_OPT_FLAG_DECODING_PARAM
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static const AVOption options[] = {
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{ "framerate", "set the video framerate", OFFSET(framerate), AV_OPT_TYPE_VIDEO_RATE, {.str = "25"}, 0, 0, DEC },
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{ "loop", "force loop over input file sequence", OFFSET(loop), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, 1, DEC },
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{ "pattern_type", "set pattern type", OFFSET(pattern_type), AV_OPT_TYPE_INT, {.i64=PT_GLOB_SEQUENCE}, 0, INT_MAX, DEC, "pattern_type"},
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{ "glob_sequence","select glob/sequence pattern type", 0, AV_OPT_TYPE_CONST, {.i64=PT_GLOB_SEQUENCE}, INT_MIN, INT_MAX, DEC, "pattern_type" },
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{ "glob", "select glob pattern type", 0, AV_OPT_TYPE_CONST, {.i64=PT_GLOB }, INT_MIN, INT_MAX, DEC, "pattern_type" },
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{ "sequence", "select sequence pattern type", 0, AV_OPT_TYPE_CONST, {.i64=PT_SEQUENCE }, INT_MIN, INT_MAX, DEC, "pattern_type" },
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{ "pixel_format", "set video pixel format", OFFSET(pixel_format), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, DEC },
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{ "start_number", "set first number in the sequence", OFFSET(start_number), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, INT_MAX, DEC },
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{ "start_number_range", "set range for looking at the first sequence number", OFFSET(start_number_range), AV_OPT_TYPE_INT, {.i64 = 5}, 1, INT_MAX, DEC },
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{ "video_size", "set video size", OFFSET(width), AV_OPT_TYPE_IMAGE_SIZE, {.str = NULL}, 0, 0, DEC },
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{ "frame_size", "force frame size in bytes", OFFSET(frame_size), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, INT_MAX, DEC },
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{ "ts_from_file", "set frame timestamp from file's one", OFFSET(ts_from_file), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, 1, DEC },
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{ NULL },
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};
|
|
|
|
#if CONFIG_IMAGE2_DEMUXER
|
|
static const AVClass img2_class = {
|
|
.class_name = "image2 demuxer",
|
|
.item_name = av_default_item_name,
|
|
.option = options,
|
|
.version = LIBAVUTIL_VERSION_INT,
|
|
};
|
|
AVInputFormat ff_image2_demuxer = {
|
|
.name = "image2",
|
|
.long_name = NULL_IF_CONFIG_SMALL("image2 sequence"),
|
|
.priv_data_size = sizeof(VideoDemuxData),
|
|
.read_probe = img_read_probe,
|
|
.read_header = img_read_header,
|
|
.read_packet = img_read_packet,
|
|
.read_close = img_read_close,
|
|
.read_seek = img_read_seek,
|
|
.flags = AVFMT_NOFILE,
|
|
.priv_class = &img2_class,
|
|
};
|
|
#endif
|
|
#if CONFIG_IMAGE2PIPE_DEMUXER
|
|
static const AVClass img2pipe_class = {
|
|
.class_name = "image2pipe demuxer",
|
|
.item_name = av_default_item_name,
|
|
.option = options,
|
|
.version = LIBAVUTIL_VERSION_INT,
|
|
};
|
|
AVInputFormat ff_image2pipe_demuxer = {
|
|
.name = "image2pipe",
|
|
.long_name = NULL_IF_CONFIG_SMALL("piped image2 sequence"),
|
|
.priv_data_size = sizeof(VideoDemuxData),
|
|
.read_header = img_read_header,
|
|
.read_packet = img_read_packet,
|
|
.priv_class = &img2pipe_class,
|
|
};
|
|
#endif
|