added still image support

Originally committed as revision 1439 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavformat/Makefile

@@ -12,9 +12,13 @@ OBJS= utils.o cutils.o allformats.o
 
 # mux and demuxes
 OBJS+=mpeg.o mpegts.o ffm.o crc.o img.o raw.o rm.o asf.o \
-      avienc.o avidec.o wav.o swf.o au.o gif.o mov.o jpeg.o dv.o framehook.o
+      avienc.o avidec.o wav.o swf.o au.o gif.o mov.o jpeg.o dv.o \
+      yuv4mpeg.o
+# image formats
+OBJS+= pnm.o yuv.o
 # file I/O
 OBJS+= avio.o aviobuf.o file.o 
+OBJS+= framehook.o 
 
 ifeq ($(BUILD_STRPTIME),yes)
 OBJS+= strptime.o

libavformat/allformats.c

@@ -45,6 +45,8 @@ void av_register_all(void)
     mov_init();
     jpeg_init();
     dv_init();
+
+    av_register_output_format(&yuv4mpegpipe_oformat);
     
 #ifdef CONFIG_VORBIS
     ogg_init();
@@ -60,6 +62,14 @@ void av_register_all(void)
     audio_init();
 #endif
 
+    /* image formats */
+    av_register_image_format(&pnm_image_format);
+    av_register_image_format(&pbm_image_format);
+    av_register_image_format(&pgm_image_format);
+    av_register_image_format(&ppm_image_format);
+    av_register_image_format(&pgmyuv_image_format);
+    av_register_image_format(&yuv_image_format);
+
     /* file protocols */
     register_protocol(&file_protocol);
     register_protocol(&pipe_protocol);

libavformat/pnm.c

@@ -0,0 +1,285 @@
+/*
+ * PNM image format
+ * Copyright (c) 2002, 2003 Fabrice Bellard.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+#include "avformat.h"
+
+static inline int pnm_space(int c)  
+{
+    return (c == ' ' || c == '\n' || c == '\r' || c == '\t');
+}
+
+static void pnm_get(ByteIOContext *f, char *str, int buf_size) 
+{
+    char *s;
+    int c;
+    
+    /* skip spaces and comments */
+    for(;;) {
+        c = url_fgetc(f);
+        if (c == '#')  {
+            do  {
+                c = url_fgetc(f);
+            } while (c != '\n' && c != URL_EOF);
+        } else if (!pnm_space(c)) {
+            break;
+        }
+    }
+    
+    s = str;
+    while (c != URL_EOF && !pnm_space(c)) {
+        if ((s - str)  < buf_size - 1)
+            *s++ = c;
+        c = url_fgetc(f);
+    }
+    *s = '\0';
+}
+
+static int pnm_read1(ByteIOContext *f, 
+                     int (*alloc_cb)(void *opaque, AVImageInfo *info), void *opaque,
+                     int allow_yuv)
+{
+    int i, n, linesize, h;
+    char buf1[32];
+    unsigned char *ptr;
+    AVImageInfo info1, *info = &info1;
+    int ret;
+
+    pnm_get(f, buf1, sizeof(buf1));
+    if (!strcmp(buf1, "P4")) {
+        info->pix_fmt = PIX_FMT_MONOWHITE;
+    } else if (!strcmp(buf1, "P5")) {
+        if (allow_yuv) 
+            info->pix_fmt = PIX_FMT_YUV420P;
+        else
+            info->pix_fmt = PIX_FMT_GRAY8;
+    } else if (!strcmp(buf1, "P6")) {
+        info->pix_fmt = PIX_FMT_RGB24;
+    } else {
+        return AVERROR_INVALIDDATA;
+    }
+    pnm_get(f, buf1, sizeof(buf1));
+    info->width = atoi(buf1);
+    if (info->width <= 0)
+        return AVERROR_INVALIDDATA;
+    pnm_get(f, buf1, sizeof(buf1));
+    info->height = atoi(buf1);
+    if (info->height <= 0)
+        return AVERROR_INVALIDDATA;
+    if (info->pix_fmt != PIX_FMT_MONOWHITE) {
+        pnm_get(f, buf1, sizeof(buf1));
+    }
+
+    /* more check if YUV420 */
+    if (info->pix_fmt == PIX_FMT_YUV420P) {
+        if ((info->width & 1) != 0)
+            return AVERROR_INVALIDDATA;
+        h = (info->height * 2);
+        if ((h % 3) != 0)
+            return AVERROR_INVALIDDATA;
+        h /= 3;
+        info->height = h;
+    }
+    
+    ret = alloc_cb(opaque, info);
+    if (ret)
+        return ret;
+    
+    switch(info->pix_fmt) {
+    default:
+        return AVERROR_INVALIDDATA;
+    case PIX_FMT_RGB24:
+        n = info->width * 3;
+        goto do_read;
+    case PIX_FMT_GRAY8:
+        n = info->width;
+        goto do_read;
+    case PIX_FMT_MONOWHITE:
+        n = (info->width + 7) >> 3;
+    do_read:
+        ptr = info->pict.data[0];
+        linesize = info->pict.linesize[0];
+        for(i = 0; i < info->height; i++) {
+            get_buffer(f, ptr, n);
+            ptr += linesize;
+        }
+        break;
+    case PIX_FMT_YUV420P:
+        {
+            unsigned char *ptr1, *ptr2;
+
+            n = info->width;
+            ptr = info->pict.data[0];
+            linesize = info->pict.linesize[0];
+            for(i = 0; i < info->height; i++) {
+                get_buffer(f, ptr, n);
+                ptr += linesize;
+            }
+            ptr1 = info->pict.data[1];
+            ptr2 = info->pict.data[2];
+            n >>= 1;
+            h = info->height >> 1;
+            for(i = 0; i < h; i++) {
+                get_buffer(f, ptr1, n);
+                get_buffer(f, ptr2, n);
+                ptr1 += info->pict.linesize[1];
+                ptr2 += info->pict.linesize[2];
+            }
+        }
+        break;
+    }
+    return 0;
+}
+
+static int pnm_read(ByteIOContext *f, 
+                    int (*alloc_cb)(void *opaque, AVImageInfo *info), void *opaque)
+{
+    return pnm_read1(f, alloc_cb, opaque, 0);
+}
+
+static int pgmyuv_read(ByteIOContext *f, 
+                       int (*alloc_cb)(void *opaque, AVImageInfo *info), void *opaque)
+{
+    return pnm_read1(f, alloc_cb, opaque, 1);
+}
+
+static int pnm_write(ByteIOContext *pb, AVImageInfo *info)
+{
+    int i, h, h1, c, n, linesize;
+    char buf[100];
+    UINT8 *ptr, *ptr1, *ptr2;
+
+    h = info->height;
+    h1 = h;
+    switch(info->pix_fmt) {
+    case PIX_FMT_MONOWHITE:
+        c = '4';
+        n = (info->width + 7) >> 3;
+        break;
+    case PIX_FMT_GRAY8:
+        c = '5';
+        n = info->width;
+        break;
+    case PIX_FMT_RGB24:
+        c = '6';
+        n = info->width * 3;
+        break;
+    case PIX_FMT_YUV420P:
+        c = '5';
+        n = info->width;
+        h1 = (h * 3) / 2;
+        break;
+    default:
+        return AVERROR_INVALIDDATA;
+    }
+    snprintf(buf, sizeof(buf), 
+             "P%c\n%d %d\n",
+             c, info->width, h1);
+    put_buffer(pb, buf, strlen(buf));
+    if (info->pix_fmt != PIX_FMT_MONOWHITE) {
+        snprintf(buf, sizeof(buf), 
+                 "%d\n", 255);
+        put_buffer(pb, buf, strlen(buf));
+    }
+    
+    ptr = info->pict.data[0];
+    linesize = info->pict.linesize[0];
+    for(i=0;i<h;i++) {
+        put_buffer(pb, ptr, n);
+        ptr += linesize;
+    }
+
+    if (info->pix_fmt == PIX_FMT_YUV420P) {
+        h >>= 1;
+        n >>= 1;
+        ptr1 = info->pict.data[1];
+        ptr2 = info->pict.data[2];
+        for(i=0;i<h;i++) {
+            put_buffer(pb, ptr1, n);
+            put_buffer(pb, ptr2, n);
+            ptr1 += info->pict.linesize[1];
+            ptr2 += info->pict.linesize[2];
+        }
+    }
+    put_flush_packet(pb);
+    return 0;
+}
+    
+static int pnm_probe(AVProbeData *pd)
+{
+    const char *p = pd->buf;
+    if (pd->buf_size >= 8 &&
+        p[0] == 'P' &&
+        p[1] >= '4' && p[1] <= '6' &&
+        p[2] == '\n')
+        return AVPROBE_SCORE_MAX;
+    else
+        return 0;
+}
+
+static int pgmyuv_probe(AVProbeData *pd)
+{
+    if (match_ext(pd->filename, "pgmyuv"))
+        return AVPROBE_SCORE_MAX;
+    else
+        return 0;
+}
+
+AVImageFormat pnm_image_format = {
+    "pnm",
+    NULL,
+    pnm_probe,
+    pnm_read,
+    0,
+    NULL,
+};
+
+AVImageFormat pbm_image_format = {
+    "pbm",
+    "pbm",
+    NULL,
+    NULL,
+    (1 << PIX_FMT_MONOWHITE),
+    pnm_write,
+};
+
+AVImageFormat pgm_image_format = {
+    "pgm",
+    "pgm",
+    NULL,
+    NULL,
+    (1 << PIX_FMT_GRAY8),
+    pnm_write,
+};
+
+AVImageFormat ppm_image_format = {
+    "ppm",
+    "ppm",
+    NULL,
+    NULL,
+    (1 << PIX_FMT_RGB24),
+    pnm_write,
+};
+
+AVImageFormat pgmyuv_image_format = {
+    "pgmyuv",
+    NULL,
+    pgmyuv_probe,
+    pgmyuv_read,
+    (1 << PIX_FMT_YUV420P),
+    pnm_write,
+};

libavformat/utils.c

@@ -35,6 +35,7 @@
 
 AVInputFormat *first_iformat;
 AVOutputFormat *first_oformat;
+AVImageFormat *first_image_format;
 
 void av_register_input_format(AVInputFormat *format)
 {
@@ -84,6 +85,11 @@ AVOutputFormat *guess_format(const char *short_name, const char *filename,
     AVOutputFormat *fmt, *fmt_found;
     int score_max, score;
 
+    /* specific test for image sequences */
+    if (!short_name && filename && filename_number_test(filename) >= 0) {
+        return guess_format("image", NULL, NULL);
+    }
+
     /* find the proper file type */
     fmt_found = NULL;
     score_max = 0;
@@ -326,8 +332,8 @@ int av_open_input_file(AVFormatContext **ic_ptr, const char *filename,
         fmt = av_probe_input_format(pd, 0);
     }
 
-    /* if no file needed do not try to open one */
     if (!fmt || !(fmt->flags & AVFMT_NOFILE)) {
+        /* if no file needed do not try to open one */
         if (url_fopen(&ic->pb, filename, URL_RDONLY) < 0) {
             err = AVERROR_IO;
             goto fail;
@@ -365,6 +371,14 @@ int av_open_input_file(AVFormatContext **ic_ptr, const char *filename,
 
     ic->iformat = fmt;
 
+    /* check filename in case of an image number is expected */
+    if (ic->iformat->flags & AVFMT_NEEDNUMBER) {
+        if (filename_number_test(ic->filename) < 0) { 
+            err = AVERROR_NUMEXPECTED;
+            goto fail1;
+        }
+    }
+    
     /* allocate private data */
     ic->priv_data = av_mallocz(fmt->priv_data_size);
     if (!ic->priv_data) {
@@ -375,14 +389,6 @@ int av_open_input_file(AVFormatContext **ic_ptr, const char *filename,
     /* default pts settings is MPEG like */
     av_set_pts_info(ic, 33, 1, 90000);
 
-    /* check filename in case of an image number is expected */
-    if (ic->iformat->flags & AVFMT_NEEDNUMBER) {
-        if (filename_number_test(ic->filename) < 0) { 
-            err = AVERROR_NUMEXPECTED;
-            goto fail1;
-        }
-    }
-    
     err = ic->iformat->read_header(ic, ap);
     if (err < 0)
         goto fail1;
@@ -707,6 +713,21 @@ AVStream *av_new_stream(AVFormatContext *s, int id)
 /************************************************************/
 /* output media file */
 
+int av_set_parameters(AVFormatContext *s, AVFormatParameters *ap)
+{
+    int ret;
+
+    s->priv_data = av_mallocz(s->oformat->priv_data_size);
+    if (!s->priv_data)
+        return AVERROR_NOMEM;
+    if (s->oformat->set_parameters) {
+        ret = s->oformat->set_parameters(s, ap);
+        if (ret < 0)
+            return ret;
+    }
+    return 0;
+}
+
 /**
  * allocate the stream private data and write the stream header to an
  * output media file
@@ -719,9 +740,6 @@ int av_write_header(AVFormatContext *s)
     int ret, i;
     AVStream *st;
 
-    s->priv_data = av_mallocz(s->oformat->priv_data_size);
-    if (!s->priv_data)
-        return AVERROR_NOMEM;
     /* default pts settings is MPEG like */
     av_set_pts_info(s, 33, 1, 90000);
     ret = s->oformat->write_header(s);
@@ -1291,3 +1309,88 @@ void av_frac_add(AVFrac *f, INT64 incr)
     }
     f->num = num;
 }
+
+/**
+ * register a new image format
+ * @param img_fmt Image format descriptor
+ */
+void av_register_image_format(AVImageFormat *img_fmt)
+{
+    AVImageFormat **p;
+
+    p = &first_image_format;
+    while (*p != NULL) p = &(*p)->next;
+    *p = img_fmt;
+    img_fmt->next = NULL;
+}
+
+/* guess image format */
+AVImageFormat *av_probe_image_format(AVProbeData *pd)
+{
+    AVImageFormat *fmt1, *fmt;
+    int score, score_max;
+
+    fmt = NULL;
+    score_max = 0;
+    for(fmt1 = first_image_format; fmt1 != NULL; fmt1 = fmt1->next) {
+        if (fmt1->img_probe) {
+            score = fmt1->img_probe(pd);
+            if (score > score_max) {
+                score_max = score;
+                fmt = fmt1;
+            }
+        }
+    }
+    return fmt;
+}
+
+AVImageFormat *guess_image_format(const char *filename)
+{
+    AVImageFormat *fmt1;
+
+    for(fmt1 = first_image_format; fmt1 != NULL; fmt1 = fmt1->next) {
+        if (fmt1->extensions && match_ext(filename, fmt1->extensions))
+            return fmt1;
+    }
+    return NULL;
+}
+
+/**
+ * Read an image from a stream. 
+ * @param gb byte stream containing the image
+ * @param fmt image format, NULL if probing is required
+ */
+int av_read_image(ByteIOContext *pb, const char *filename,
+                  AVImageFormat *fmt,
+                  int (*alloc_cb)(void *, AVImageInfo *info), void *opaque)
+{
+    char buf[PROBE_BUF_SIZE];
+    AVProbeData probe_data, *pd = &probe_data;
+    offset_t pos;
+    int ret;
+
+    if (!fmt) {
+        pd->filename = (char *)filename;
+        pd->buf = buf;
+        pos = url_ftell(pb);
+        pd->buf_size = get_buffer(pb, buf, PROBE_BUF_SIZE);
+        url_fseek(pb, pos, SEEK_SET);
+        fmt = av_probe_image_format(pd);
+    }
+    if (!fmt)
+        return AVERROR_NOFMT;
+    ret = fmt->img_read(pb, alloc_cb, opaque);
+    return ret;
+}
+
+/**
+ * Write an image to a stream.
+ * @param pb byte stream for the image output
+ * @param fmt image format
+ * @param img image data and informations
+ */
+int av_write_image(ByteIOContext *pb, AVImageFormat *fmt, AVImageInfo *img)
+{
+    return fmt->img_write(pb, img);
+}
+

libavformat/yuv.c

@@ -0,0 +1,158 @@
+/*
+ * .Y.U.V image format
+ * Copyright (c) 2003 Fabrice Bellard.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+#include "avformat.h"
+
+static int sizes[][2] = {
+    { 640, 480 },
+    { 720, 480 },
+    { 720, 576 },
+    { 352, 288 },
+    { 352, 240 },
+    { 160, 128 },
+    { 512, 384 },
+    { 640, 352 },
+    { 640, 240 },
+};
+
+static int infer_size(int *width_ptr, int *height_ptr, int size)
+{
+    int i;
+
+    for(i=0;i<sizeof(sizes)/sizeof(sizes[0]);i++) {
+        if ((sizes[i][0] * sizes[i][1]) == size) {
+            *width_ptr = sizes[i][0];
+            *height_ptr = sizes[i][1];
+            return 0;
+        }
+    }
+    return -1;
+}
+
+static int yuv_read(ByteIOContext *f,
+                    int (*alloc_cb)(void *opaque, AVImageInfo *info), void *opaque)
+{
+    ByteIOContext pb1, *pb = &pb1;
+    int img_size, ret;
+    char fname[1024], *p;
+    int size;
+    URLContext *h;
+    AVImageInfo info1, *info = &info1;
+    
+    /* XXX: hack hack */
+    h = url_fileno(f);
+    img_size = url_seek(h, 0, SEEK_END);
+    url_get_filename(h, fname, sizeof(fname));
+
+    if (infer_size(&info->width, &info->height, img_size) < 0) {
+        return -EIO;
+    }
+    info->pix_fmt = PIX_FMT_YUV420P;
+    
+    ret = alloc_cb(opaque, info);
+    if (ret)
+        return ret;
+    
+    size = info->width * info->height;
+    
+    p = strrchr(fname, '.');
+    if (!p || p[1] != 'Y')
+        return -EIO;
+
+    get_buffer(f, info->pict.data[0], size);
+    
+    p[1] = 'U';
+    if (url_fopen(pb, fname, URL_RDONLY) < 0)
+        return -EIO;
+
+    get_buffer(pb, info->pict.data[1], size / 4);
+    url_fclose(pb);
+    
+    p[1] = 'V';
+    if (url_fopen(pb, fname, URL_RDONLY) < 0)
+        return -EIO;
+
+    get_buffer(pb, info->pict.data[2], size / 4);
+    url_fclose(pb);
+    return 0;
+}
+
+static int yuv_write(ByteIOContext *pb2, AVImageInfo *info)
+{
+    ByteIOContext pb1, *pb;
+    char fname[1024], *p;
+    int i, j, width, height;
+    UINT8 *ptr;
+    URLContext *h;
+    static const char *ext = "YUV";
+    
+    /* XXX: hack hack */
+    h = url_fileno(pb2);
+    url_get_filename(h, fname, sizeof(fname));
+
+    p = strrchr(fname, '.');
+    if (!p || p[1] != 'Y')
+        return -EIO;
+
+    width = info->width;
+    height = info->height;
+
+    for(i=0;i<3;i++) {
+        if (i == 1) {
+            width >>= 1;
+            height >>= 1;
+        }
+
+        if (i >= 1) {
+            pb = &pb1;
+            p[1] = ext[i];
+            if (url_fopen(pb, fname, URL_WRONLY) < 0)
+                return -EIO;
+        } else {
+            pb = pb2;
+        }
+    
+        ptr = info->pict.data[i];
+        for(j=0;j<height;j++) {
+            put_buffer(pb, ptr, width);
+            ptr += info->pict.linesize[i];
+        }
+        put_flush_packet(pb);
+        if (i >= 1) {
+            url_fclose(pb);
+        }
+    }
+    return 0;
+}
+    
+static int yuv_probe(AVProbeData *pd)
+{
+    if (match_ext(pd->filename, "Y"))
+        return AVPROBE_SCORE_MAX;
+    else
+        return 0;
+}
+
+AVImageFormat yuv_image_format = {
+    "yuv",
+    "Y",
+    yuv_probe,
+    yuv_read,
+    (1 << PIX_FMT_YUV420P),
+    yuv_write,
+};