yading@11: /*
yading@11:  * Image format
yading@11:  * Copyright (c) 2000, 2001, 2002 Fabrice Bellard
yading@11:  * Copyright (c) 2004 Michael Niedermayer
yading@11:  *
yading@11:  * This file is part of FFmpeg.
yading@11:  *
yading@11:  * FFmpeg is free software; you can redistribute it and/or
yading@11:  * modify it under the terms of the GNU Lesser General Public
yading@11:  * License as published by the Free Software Foundation; either
yading@11:  * version 2.1 of the License, or (at your option) any later version.
yading@11:  *
yading@11:  * FFmpeg is distributed in the hope that it will be useful,
yading@11:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
yading@11:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
yading@11:  * Lesser General Public License for more details.
yading@11:  *
yading@11:  * You should have received a copy of the GNU Lesser General Public
yading@11:  * License along with FFmpeg; if not, write to the Free Software
yading@11:  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
yading@11:  */
yading@11: 
yading@11: #include "libavutil/avstring.h"
yading@11: #include "libavutil/log.h"
yading@11: #include "libavutil/opt.h"
yading@11: #include "libavutil/pixdesc.h"
yading@11: #include "libavutil/parseutils.h"
yading@11: #include "avformat.h"
yading@11: #include "internal.h"
yading@11: #if HAVE_GLOB
yading@11: #include <glob.h>
yading@11: 
yading@11: /* Locally define as 0 (bitwise-OR no-op) any missing glob options that
yading@11:    are non-posix glibc/bsd extensions. */
yading@11: #ifndef GLOB_NOMAGIC
yading@11: #define GLOB_NOMAGIC 0
yading@11: #endif
yading@11: #ifndef GLOB_BRACE
yading@11: #define GLOB_BRACE 0
yading@11: #endif
yading@11: 
yading@11: #endif /* HAVE_GLOB */
yading@11: 
yading@11: typedef struct {
yading@11:     const AVClass *class;  /**< Class for private options. */
yading@11:     int img_first;
yading@11:     int img_last;
yading@11:     int img_number;
yading@11:     int64_t pts;
yading@11:     int img_count;
yading@11:     int is_pipe;
yading@11:     int split_planes;       /**< use independent file for each Y, U, V plane */
yading@11:     char path[1024];
yading@11:     char *pixel_format;     /**< Set by a private option. */
yading@11:     int width, height;      /**< Set by a private option. */
yading@11:     AVRational framerate;   /**< Set by a private option. */
yading@11:     int loop;
yading@11:     enum { PT_GLOB_SEQUENCE, PT_GLOB, PT_SEQUENCE } pattern_type;
yading@11:     int use_glob;
yading@11: #if HAVE_GLOB
yading@11:     glob_t globstate;
yading@11: #endif
yading@11:     int start_number;
yading@11:     int start_number_range;
yading@11:     int frame_size;
yading@11: } VideoDemuxData;
yading@11: 
yading@11: static const int sizes[][2] = {
yading@11:     { 640, 480 },
yading@11:     { 720, 480 },
yading@11:     { 720, 576 },
yading@11:     { 352, 288 },
yading@11:     { 352, 240 },
yading@11:     { 160, 128 },
yading@11:     { 512, 384 },
yading@11:     { 640, 352 },
yading@11:     { 640, 240 },
yading@11: };
yading@11: 
yading@11: static int infer_size(int *width_ptr, int *height_ptr, int size)
yading@11: {
yading@11:     int i;
yading@11: 
yading@11:     for (i = 0; i < FF_ARRAY_ELEMS(sizes); i++) {
yading@11:         if ((sizes[i][0] * sizes[i][1]) == size) {
yading@11:             *width_ptr  = sizes[i][0];
yading@11:             *height_ptr = sizes[i][1];
yading@11:             return 0;
yading@11:         }
yading@11:     }
yading@11: 
yading@11:     return -1;
yading@11: }
yading@11: 
yading@11: static int is_glob(const char *path)
yading@11: {
yading@11: #if HAVE_GLOB
yading@11:     size_t span = 0;
yading@11:     const char *p = path;
yading@11: 
yading@11:     while (p = strchr(p, '%')) {
yading@11:         if (*(++p) == '%') {
yading@11:             ++p;
yading@11:             continue;
yading@11:         }
yading@11:         if (span = strspn(p, "*?[]{}"))
yading@11:             break;
yading@11:     }
yading@11:     /* Did we hit a glob char or get to the end? */
yading@11:     return span != 0;
yading@11: #else
yading@11:     return 0;
yading@11: #endif
yading@11: }
yading@11: 
yading@11: /**
yading@11:  * Get index range of image files matched by path.
yading@11:  *
yading@11:  * @param pfirst_index pointer to index updated with the first number in the range
yading@11:  * @param plast_index  pointer to index updated with the last number in the range
yading@11:  * @param path         path which has to be matched by the image files in the range
yading@11:  * @param start_index  minimum accepted value for the first index in the range
yading@11:  * @return -1 if no image file could be found
yading@11:  */
yading@11: static int find_image_range(int *pfirst_index, int *plast_index,
yading@11:                             const char *path, int start_index, int start_index_range)
yading@11: {
yading@11:     char buf[1024];
yading@11:     int range, last_index, range1, first_index;
yading@11: 
yading@11:     /* find the first image */
yading@11:     for (first_index = start_index; first_index < start_index + start_index_range; first_index++) {
yading@11:         if (av_get_frame_filename(buf, sizeof(buf), path, first_index) < 0) {
yading@11:             *pfirst_index =
yading@11:             *plast_index  = 1;
yading@11:             if (avio_check(buf, AVIO_FLAG_READ) > 0)
yading@11:                 return 0;
yading@11:             return -1;
yading@11:         }
yading@11:         if (avio_check(buf, AVIO_FLAG_READ) > 0)
yading@11:             break;
yading@11:     }
yading@11:     if (first_index == start_index + start_index_range)
yading@11:         goto fail;
yading@11: 
yading@11:     /* find the last image */
yading@11:     last_index = first_index;
yading@11:     for (;;) {
yading@11:         range = 0;
yading@11:         for (;;) {
yading@11:             if (!range)
yading@11:                 range1 = 1;
yading@11:             else
yading@11:                 range1 = 2 * range;
yading@11:             if (av_get_frame_filename(buf, sizeof(buf), path,
yading@11:                                       last_index + range1) < 0)
yading@11:                 goto fail;
yading@11:             if (avio_check(buf, AVIO_FLAG_READ) <= 0)
yading@11:                 break;
yading@11:             range = range1;
yading@11:             /* just in case... */
yading@11:             if (range >= (1 << 30))
yading@11:                 goto fail;
yading@11:         }
yading@11:         /* we are sure than image last_index + range exists */
yading@11:         if (!range)
yading@11:             break;
yading@11:         last_index += range;
yading@11:     }
yading@11:     *pfirst_index = first_index;
yading@11:     *plast_index  = last_index;
yading@11:     return 0;
yading@11: 
yading@11: fail:
yading@11:     return -1;
yading@11: }
yading@11: 
yading@11: static int img_read_probe(AVProbeData *p)
yading@11: {
yading@11:     if (p->filename && ff_guess_image2_codec(p->filename)) {
yading@11:         if (av_filename_number_test(p->filename))
yading@11:             return AVPROBE_SCORE_MAX;
yading@11:         else if (is_glob(p->filename))
yading@11:             return AVPROBE_SCORE_MAX;
yading@11:         else if (av_match_ext(p->filename, "raw") || av_match_ext(p->filename, "gif"))
yading@11:             return 5;
yading@11:         else
yading@11:             return AVPROBE_SCORE_MAX / 2;
yading@11:     }
yading@11:     return 0;
yading@11: }
yading@11: 
yading@11: static int img_read_header(AVFormatContext *s1)
yading@11: {
yading@11:     VideoDemuxData *s = s1->priv_data;
yading@11:     int first_index, last_index;
yading@11:     AVStream *st;
yading@11:     enum AVPixelFormat pix_fmt = AV_PIX_FMT_NONE;
yading@11: 
yading@11:     s1->ctx_flags |= AVFMTCTX_NOHEADER;
yading@11: 
yading@11:     st = avformat_new_stream(s1, NULL);
yading@11:     if (!st) {
yading@11:         return AVERROR(ENOMEM);
yading@11:     }
yading@11: 
yading@11:     if (s->pixel_format &&
yading@11:         (pix_fmt = av_get_pix_fmt(s->pixel_format)) == AV_PIX_FMT_NONE) {
yading@11:         av_log(s1, AV_LOG_ERROR, "No such pixel format: %s.\n",
yading@11:                s->pixel_format);
yading@11:         return AVERROR(EINVAL);
yading@11:     }
yading@11: 
yading@11:     av_strlcpy(s->path, s1->filename, sizeof(s->path));
yading@11:     s->img_number = 0;
yading@11:     s->img_count  = 0;
yading@11: 
yading@11:     /* find format */
yading@11:     if (s1->iformat->flags & AVFMT_NOFILE)
yading@11:         s->is_pipe = 0;
yading@11:     else {
yading@11:         s->is_pipe       = 1;
yading@11:         st->need_parsing = AVSTREAM_PARSE_FULL;
yading@11:     }
yading@11: 
yading@11:     avpriv_set_pts_info(st, 60, s->framerate.den, s->framerate.num);
yading@11: 
yading@11:     if (s->width && s->height) {
yading@11:         st->codec->width  = s->width;
yading@11:         st->codec->height = s->height;
yading@11:     }
yading@11: 
yading@11:     if (!s->is_pipe) {
yading@11:         if (s->pattern_type == PT_GLOB_SEQUENCE) {
yading@11:         s->use_glob = is_glob(s->path);
yading@11:         if (s->use_glob) {
yading@11:             char *p = s->path, *q, *dup;
yading@11:             int gerr;
yading@11: 
yading@11:             av_log(s1, AV_LOG_WARNING, "Pattern type 'glob_sequence' is deprecated: "
yading@11:                    "use pattern_type 'glob' instead\n");
yading@11: #if HAVE_GLOB
yading@11:             dup = q = av_strdup(p);
yading@11:             while (*q) {
yading@11:                 /* Do we have room for the next char and a \ insertion? */
yading@11:                 if ((p - s->path) >= (sizeof(s->path) - 2))
yading@11:                   break;
yading@11:                 if (*q == '%' && strspn(q + 1, "%*?[]{}"))
yading@11:                     ++q;
yading@11:                 else if (strspn(q, "\\*?[]{}"))
yading@11:                     *p++ = '\\';
yading@11:                 *p++ = *q++;
yading@11:             }
yading@11:             *p = 0;
yading@11:             av_free(dup);
yading@11: 
yading@11:             gerr = glob(s->path, GLOB_NOCHECK|GLOB_BRACE|GLOB_NOMAGIC, NULL, &s->globstate);
yading@11:             if (gerr != 0) {
yading@11:                 return AVERROR(ENOENT);
yading@11:             }
yading@11:             first_index = 0;
yading@11:             last_index = s->globstate.gl_pathc - 1;
yading@11: #endif
yading@11:         }
yading@11:         }
yading@11:         if ((s->pattern_type == PT_GLOB_SEQUENCE && !s->use_glob) || s->pattern_type == PT_SEQUENCE) {
yading@11:             if (find_image_range(&first_index, &last_index, s->path,
yading@11:                                  s->start_number, s->start_number_range) < 0) {
yading@11:                 av_log(s1, AV_LOG_ERROR,
yading@11:                        "Could find no file with with path '%s' and index in the range %d-%d\n",
yading@11:                        s->path, s->start_number, s->start_number + s->start_number_range - 1);
yading@11:                 return AVERROR(ENOENT);
yading@11:             }
yading@11:         } else if (s->pattern_type == PT_GLOB) {
yading@11: #if HAVE_GLOB
yading@11:             int gerr;
yading@11:             gerr = glob(s->path, GLOB_NOCHECK|GLOB_BRACE|GLOB_NOMAGIC, NULL, &s->globstate);
yading@11:             if (gerr != 0) {
yading@11:                 return AVERROR(ENOENT);
yading@11:             }
yading@11:             first_index = 0;
yading@11:             last_index = s->globstate.gl_pathc - 1;
yading@11:             s->use_glob = 1;
yading@11: #else
yading@11:             av_log(s1, AV_LOG_ERROR,
yading@11:                    "Pattern type 'glob' was selected but globbing "
yading@11:                    "is not supported by this libavformat build\n");
yading@11:             return AVERROR(ENOSYS);
yading@11: #endif
yading@11:         } else if (s->pattern_type != PT_GLOB_SEQUENCE) {
yading@11:             av_log(s1, AV_LOG_ERROR,
yading@11:                    "Unknown value '%d' for pattern_type option\n", s->pattern_type);
yading@11:             return AVERROR(EINVAL);
yading@11:         }
yading@11:         s->img_first  = first_index;
yading@11:         s->img_last   = last_index;
yading@11:         s->img_number = first_index;
yading@11:         /* compute duration */
yading@11:         st->start_time = 0;
yading@11:         st->duration   = last_index - first_index + 1;
yading@11:     }
yading@11: 
yading@11:     if (s1->video_codec_id) {
yading@11:         st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
yading@11:         st->codec->codec_id   = s1->video_codec_id;
yading@11:     } else if (s1->audio_codec_id) {
yading@11:         st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
yading@11:         st->codec->codec_id   = s1->audio_codec_id;
yading@11:     } else {
yading@11:         const char *str = strrchr(s->path, '.');
yading@11:         s->split_planes       = str && !av_strcasecmp(str + 1, "y");
yading@11:         st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
yading@11:         st->codec->codec_id   = ff_guess_image2_codec(s->path);
yading@11:         if (st->codec->codec_id == AV_CODEC_ID_LJPEG)
yading@11:             st->codec->codec_id = AV_CODEC_ID_MJPEG;
yading@11:     }
yading@11:     if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO &&
yading@11:         pix_fmt != AV_PIX_FMT_NONE)
yading@11:         st->codec->pix_fmt = pix_fmt;
yading@11: 
yading@11:     return 0;
yading@11: }
yading@11: 
yading@11: static int img_read_packet(AVFormatContext *s1, AVPacket *pkt)
yading@11: {
yading@11:     VideoDemuxData *s = s1->priv_data;
yading@11:     char filename_bytes[1024];
yading@11:     char *filename = filename_bytes;
yading@11:     int i;
yading@11:     int size[3]           = { 0 }, ret[3] = { 0 };
yading@11:     AVIOContext *f[3]     = { NULL };
yading@11:     AVCodecContext *codec = s1->streams[0]->codec;
yading@11: 
yading@11:     if (!s->is_pipe) {
yading@11:         /* loop over input */
yading@11:         if (s->loop && s->img_number > s->img_last) {
yading@11:             s->img_number = s->img_first;
yading@11:         }
yading@11:         if (s->img_number > s->img_last)
yading@11:             return AVERROR_EOF;
yading@11:         if (s->use_glob) {
yading@11: #if HAVE_GLOB
yading@11:             filename = s->globstate.gl_pathv[s->img_number];
yading@11: #endif
yading@11:         } else {
yading@11:         if (av_get_frame_filename(filename_bytes, sizeof(filename_bytes),
yading@11:                                   s->path,
yading@11:                                   s->img_number) < 0 && s->img_number > 1)
yading@11:             return AVERROR(EIO);
yading@11:         }
yading@11:         for (i = 0; i < 3; i++) {
yading@11:             if (avio_open2(&f[i], filename, AVIO_FLAG_READ,
yading@11:                            &s1->interrupt_callback, NULL) < 0) {
yading@11:                 if (i >= 1)
yading@11:                     break;
yading@11:                 av_log(s1, AV_LOG_ERROR, "Could not open file : %s\n",
yading@11:                        filename);
yading@11:                 return AVERROR(EIO);
yading@11:             }
yading@11:             size[i] = avio_size(f[i]);
yading@11: 
yading@11:             if (!s->split_planes)
yading@11:                 break;
yading@11:             filename[strlen(filename) - 1] = 'U' + i;
yading@11:         }
yading@11: 
yading@11:         if (codec->codec_id == AV_CODEC_ID_RAWVIDEO && !codec->width)
yading@11:             infer_size(&codec->width, &codec->height, size[0]);
yading@11:     } else {
yading@11:         f[0] = s1->pb;
yading@11:         if (url_feof(f[0]))
yading@11:             return AVERROR(EIO);
yading@11:         if (s->frame_size > 0) {
yading@11:             size[0] = s->frame_size;
yading@11:         } else {
yading@11:             size[0] = 4096;
yading@11:         }
yading@11:     }
yading@11: 
yading@11:     if (av_new_packet(pkt, size[0] + size[1] + size[2]) < 0)
yading@11:         return AVERROR(ENOMEM);
yading@11:     pkt->stream_index = 0;
yading@11:     pkt->flags       |= AV_PKT_FLAG_KEY;
yading@11:     if (!s->is_pipe)
yading@11:         pkt->pts      = s->pts;
yading@11: 
yading@11:     pkt->size = 0;
yading@11:     for (i = 0; i < 3; i++) {
yading@11:         if (f[i]) {
yading@11:             ret[i] = avio_read(f[i], pkt->data + pkt->size, size[i]);
yading@11:             if (!s->is_pipe)
yading@11:                 avio_close(f[i]);
yading@11:             if (ret[i] > 0)
yading@11:                 pkt->size += ret[i];
yading@11:         }
yading@11:     }
yading@11: 
yading@11:     if (ret[0] <= 0 || ret[1] < 0 || ret[2] < 0) {
yading@11:         av_free_packet(pkt);
yading@11:         return AVERROR(EIO); /* signal EOF */
yading@11:     } else {
yading@11:         s->img_count++;
yading@11:         s->img_number++;
yading@11:         s->pts++;
yading@11:         return 0;
yading@11:     }
yading@11: }
yading@11: 
yading@11: static int img_read_close(struct AVFormatContext* s1)
yading@11: {
yading@11:     VideoDemuxData *s = s1->priv_data;
yading@11: #if HAVE_GLOB
yading@11:     if (s->use_glob) {
yading@11:         globfree(&s->globstate);
yading@11:     }
yading@11: #endif
yading@11:     return 0;
yading@11: }
yading@11: 
yading@11: static int img_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
yading@11: {
yading@11:     VideoDemuxData *s1 = s->priv_data;
yading@11: 
yading@11:     if (timestamp < 0 || !s1->loop && timestamp > s1->img_last - s1->img_first)
yading@11:         return -1;
yading@11:     s1->img_number = timestamp%(s1->img_last - s1->img_first + 1) + s1->img_first;
yading@11:     s1->pts = timestamp;
yading@11:     return 0;
yading@11: }
yading@11: 
yading@11: #define OFFSET(x) offsetof(VideoDemuxData, x)
yading@11: #define DEC AV_OPT_FLAG_DECODING_PARAM
yading@11: static const AVOption options[] = {
yading@11:     { "framerate",    "set the video framerate",             OFFSET(framerate),    AV_OPT_TYPE_VIDEO_RATE, {.str = "25"}, 0, 0,   DEC },
yading@11:     { "loop",         "force loop over input file sequence", OFFSET(loop),         AV_OPT_TYPE_INT,    {.i64 = 0   }, 0, 1,       DEC },
yading@11: 
yading@11:     { "pattern_type", "set pattern type",                    OFFSET(pattern_type), AV_OPT_TYPE_INT,    {.i64=PT_GLOB_SEQUENCE}, 0,       INT_MAX, DEC, "pattern_type"},
yading@11:     { "glob_sequence","select glob/sequence pattern type",   0, AV_OPT_TYPE_CONST,  {.i64=PT_GLOB_SEQUENCE}, INT_MIN, INT_MAX, DEC, "pattern_type" },
yading@11:     { "glob",         "select glob pattern type",            0, AV_OPT_TYPE_CONST,  {.i64=PT_GLOB         }, INT_MIN, INT_MAX, DEC, "pattern_type" },
yading@11:     { "sequence",     "select sequence pattern type",        0, AV_OPT_TYPE_CONST,  {.i64=PT_SEQUENCE     }, INT_MIN, INT_MAX, DEC, "pattern_type" },
yading@11: 
yading@11:     { "pixel_format", "set video pixel format",              OFFSET(pixel_format), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0,       DEC },
yading@11:     { "start_number", "set first number in the sequence",    OFFSET(start_number), AV_OPT_TYPE_INT,    {.i64 = 0   }, 0, INT_MAX, DEC },
yading@11:     { "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 },
yading@11:     { "video_size",   "set video size",                      OFFSET(width),        AV_OPT_TYPE_IMAGE_SIZE, {.str = NULL}, 0, 0,   DEC },
yading@11:     { "frame_size",   "force frame size in bytes",           OFFSET(frame_size),   AV_OPT_TYPE_INT,    {.i64 = 0   }, 0, INT_MAX, DEC },
yading@11:     { NULL },
yading@11: };
yading@11: 
yading@11: #if CONFIG_IMAGE2_DEMUXER
yading@11: static const AVClass img2_class = {
yading@11:     .class_name = "image2 demuxer",
yading@11:     .item_name  = av_default_item_name,
yading@11:     .option     = options,
yading@11:     .version    = LIBAVUTIL_VERSION_INT,
yading@11: };
yading@11: AVInputFormat ff_image2_demuxer = {
yading@11:     .name           = "image2",
yading@11:     .long_name      = NULL_IF_CONFIG_SMALL("image2 sequence"),
yading@11:     .priv_data_size = sizeof(VideoDemuxData),
yading@11:     .read_probe     = img_read_probe,
yading@11:     .read_header    = img_read_header,
yading@11:     .read_packet    = img_read_packet,
yading@11:     .read_close     = img_read_close,
yading@11:     .read_seek      = img_read_seek,
yading@11:     .flags          = AVFMT_NOFILE,
yading@11:     .priv_class     = &img2_class,
yading@11: };
yading@11: #endif
yading@11: #if CONFIG_IMAGE2PIPE_DEMUXER
yading@11: static const AVClass img2pipe_class = {
yading@11:     .class_name = "image2pipe demuxer",
yading@11:     .item_name  = av_default_item_name,
yading@11:     .option     = options,
yading@11:     .version    = LIBAVUTIL_VERSION_INT,
yading@11: };
yading@11: AVInputFormat ff_image2pipe_demuxer = {
yading@11:     .name           = "image2pipe",
yading@11:     .long_name      = NULL_IF_CONFIG_SMALL("piped image2 sequence"),
yading@11:     .priv_data_size = sizeof(VideoDemuxData),
yading@11:     .read_header    = img_read_header,
yading@11:     .read_packet    = img_read_packet,
yading@11:     .priv_class     = &img2pipe_class,
yading@11: };
yading@11: #endif