lavd/v4l2: move pixel format conversion code to a separate place.

This will be shared with the output device.

4 files changed, 170 insertions, 120 deletions

diff --git a/libavdevice/Makefile b/libavdevice/Makefile
index efffa8bbcd..dfde768d34 100644
--- a/libavdevice/Makefile
+++ b/libavdevice/Makefile
@@ -32,7 +32,7 @@ OBJS-$(CONFIG_PULSE_INDEV)               += pulse.o
 OBJS-$(CONFIG_SDL_OUTDEV)                += sdl.o
 OBJS-$(CONFIG_SNDIO_INDEV)               += sndio_common.o sndio_dec.o
 OBJS-$(CONFIG_SNDIO_OUTDEV)              += sndio_common.o sndio_enc.o
-OBJS-$(CONFIG_V4L2_INDEV)                += v4l2.o timefilter.o
+OBJS-$(CONFIG_V4L2_INDEV)                += v4l2.o v4l2-common.o timefilter.o
 OBJS-$(CONFIG_V4L_INDEV)                 += v4l.o
 OBJS-$(CONFIG_VFWCAP_INDEV)              += vfwcap.o
 OBJS-$(CONFIG_X11GRAB_INDEV)             += x11grab.o
diff --git a/libavdevice/v4l2-common.c b/libavdevice/v4l2-common.c
new file mode 100644
index 0000000000..572f0ed36b
--- /dev/null
+++ b/libavdevice/v4l2-common.c
@@ -0,0 +1,96 @@
+/*
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg 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 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg 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 FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "v4l2-common.h"
+
+const struct fmt_map avpriv_fmt_conversion_table[] = {
+    //ff_fmt              codec_id              v4l2_fmt
+    { AV_PIX_FMT_YUV420P, AV_CODEC_ID_RAWVIDEO, V4L2_PIX_FMT_YUV420  },
+    { AV_PIX_FMT_YUV420P, AV_CODEC_ID_RAWVIDEO, V4L2_PIX_FMT_YVU420  },
+    { AV_PIX_FMT_YUV422P, AV_CODEC_ID_RAWVIDEO, V4L2_PIX_FMT_YUV422P },
+    { AV_PIX_FMT_YUYV422, AV_CODEC_ID_RAWVIDEO, V4L2_PIX_FMT_YUYV    },
+    { AV_PIX_FMT_UYVY422, AV_CODEC_ID_RAWVIDEO, V4L2_PIX_FMT_UYVY    },
+    { AV_PIX_FMT_YUV411P, AV_CODEC_ID_RAWVIDEO, V4L2_PIX_FMT_YUV411P },
+    { AV_PIX_FMT_YUV410P, AV_CODEC_ID_RAWVIDEO, V4L2_PIX_FMT_YUV410  },
+    { AV_PIX_FMT_YUV410P, AV_CODEC_ID_RAWVIDEO, V4L2_PIX_FMT_YVU410  },
+    { AV_PIX_FMT_RGB555LE,AV_CODEC_ID_RAWVIDEO, V4L2_PIX_FMT_RGB555  },
+    { AV_PIX_FMT_RGB555BE,AV_CODEC_ID_RAWVIDEO, V4L2_PIX_FMT_RGB555X },
+    { AV_PIX_FMT_RGB565LE,AV_CODEC_ID_RAWVIDEO, V4L2_PIX_FMT_RGB565  },
+    { AV_PIX_FMT_RGB565BE,AV_CODEC_ID_RAWVIDEO, V4L2_PIX_FMT_RGB565X },
+    { AV_PIX_FMT_BGR24,   AV_CODEC_ID_RAWVIDEO, V4L2_PIX_FMT_BGR24   },
+    { AV_PIX_FMT_RGB24,   AV_CODEC_ID_RAWVIDEO, V4L2_PIX_FMT_RGB24   },
+    { AV_PIX_FMT_BGR0,    AV_CODEC_ID_RAWVIDEO, V4L2_PIX_FMT_BGR32   },
+    { AV_PIX_FMT_0RGB,    AV_CODEC_ID_RAWVIDEO, V4L2_PIX_FMT_RGB32   },
+    { AV_PIX_FMT_GRAY8,   AV_CODEC_ID_RAWVIDEO, V4L2_PIX_FMT_GREY    },
+#ifdef V4L2_PIX_FMT_Y16
+    { AV_PIX_FMT_GRAY16LE,AV_CODEC_ID_RAWVIDEO, V4L2_PIX_FMT_Y16     },
+#endif
+    { AV_PIX_FMT_NV12,    AV_CODEC_ID_RAWVIDEO, V4L2_PIX_FMT_NV12    },
+    { AV_PIX_FMT_NONE,    AV_CODEC_ID_MJPEG,    V4L2_PIX_FMT_MJPEG   },
+    { AV_PIX_FMT_NONE,    AV_CODEC_ID_MJPEG,    V4L2_PIX_FMT_JPEG    },
+#ifdef V4L2_PIX_FMT_H264
+    { AV_PIX_FMT_NONE,    AV_CODEC_ID_H264,     V4L2_PIX_FMT_H264    },
+#endif
+#ifdef V4L2_PIX_FMT_CPIA1
+    { AV_PIX_FMT_NONE,    AV_CODEC_ID_CPIA,     V4L2_PIX_FMT_CPIA1   },
+#endif
+    { AV_PIX_FMT_NONE,    AV_CODEC_ID_NONE,     0                    },
+};
+
+uint32_t avpriv_fmt_ff2v4l(enum AVPixelFormat pix_fmt, enum AVCodecID codec_id)
+{
+    int i;
+
+    for (i = 0; avpriv_fmt_conversion_table[i].codec_id != AV_CODEC_ID_NONE; i++) {
+        if ((codec_id == AV_CODEC_ID_NONE ||
+             avpriv_fmt_conversion_table[i].codec_id == codec_id) &&
+            (pix_fmt == AV_PIX_FMT_NONE ||
+             avpriv_fmt_conversion_table[i].ff_fmt == pix_fmt)) {
+            return avpriv_fmt_conversion_table[i].v4l2_fmt;
+        }
+    }
+
+    return 0;
+}
+
+enum AVPixelFormat avpriv_fmt_v4l2ff(uint32_t v4l2_fmt, enum AVCodecID codec_id)
+{
+    int i;
+
+    for (i = 0; avpriv_fmt_conversion_table[i].codec_id != AV_CODEC_ID_NONE; i++) {
+        if (avpriv_fmt_conversion_table[i].v4l2_fmt == v4l2_fmt &&
+            avpriv_fmt_conversion_table[i].codec_id == codec_id) {
+            return avpriv_fmt_conversion_table[i].ff_fmt;
+        }
+    }
+
+    return AV_PIX_FMT_NONE;
+}
+
+enum AVCodecID avpriv_fmt_v4l2codec(uint32_t v4l2_fmt)
+{
+    int i;
+
+    for (i = 0; avpriv_fmt_conversion_table[i].codec_id != AV_CODEC_ID_NONE; i++) {
+        if (avpriv_fmt_conversion_table[i].v4l2_fmt == v4l2_fmt) {
+            return avpriv_fmt_conversion_table[i].codec_id;
+        }
+    }
+
+    return AV_CODEC_ID_NONE;
+}
diff --git a/libavdevice/v4l2-common.h b/libavdevice/v4l2-common.h
new file mode 100644
index 0000000000..8aef2349ae
--- /dev/null
+++ b/libavdevice/v4l2-common.h
@@ -0,0 +1,62 @@
+/*
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg 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 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg 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 FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVDEVICE_V4L2_COMMON_H
+#define AVDEVICE_V4L2_COMMON_H
+
+#undef __STRICT_ANSI__ //workaround due to broken kernel headers
+#include "config.h"
+#include "libavformat/internal.h"
+#include <unistd.h>
+#include <fcntl.h>
+#include <sys/ioctl.h>
+#include <sys/mman.h>
+#include <sys/time.h>
+#if HAVE_SYS_VIDEOIO_H
+#include <sys/videoio.h>
+#else
+#if HAVE_ASM_TYPES_H
+#include <asm/types.h>
+#endif
+#include <linux/videodev2.h>
+#endif
+#include "libavutil/atomic.h"
+#include "libavutil/avassert.h"
+#include "libavutil/imgutils.h"
+#include "libavutil/log.h"
+#include "libavutil/opt.h"
+#include "avdevice.h"
+#include "timefilter.h"
+#include "libavutil/parseutils.h"
+#include "libavutil/pixdesc.h"
+#include "libavutil/time.h"
+#include "libavutil/avstring.h"
+
+struct fmt_map {
+    enum AVPixelFormat ff_fmt;
+    enum AVCodecID codec_id;
+    uint32_t v4l2_fmt;
+};
+
+extern av_export const struct fmt_map avpriv_fmt_conversion_table[];
+
+uint32_t avpriv_fmt_ff2v4l(enum AVPixelFormat pix_fmt, enum AVCodecID codec_id);
+enum AVPixelFormat avpriv_fmt_v4l2ff(uint32_t v4l2_fmt, enum AVCodecID codec_id);
+enum AVCodecID avpriv_fmt_v4l2codec(uint32_t v4l2_fmt);
+
+#endif /* AVDEVICE_V4L2_COMMON_H */
diff --git a/libavdevice/v4l2.c b/libavdevice/v4l2.c
index 7c6c1bcc45..90985e35f3 100644
--- a/libavdevice/v4l2.c
+++ b/libavdevice/v4l2.c
@@ -30,33 +30,7 @@
  * V4L2_PIX_FMT_* and AV_PIX_FMT_*
  */
 
-#undef __STRICT_ANSI__ //workaround due to broken kernel headers
-#include "config.h"
-#include "libavformat/internal.h"
-#include <unistd.h>
-#include <fcntl.h>
-#include <sys/ioctl.h>
-#include <sys/mman.h>
-#include <sys/time.h>
-#if HAVE_SYS_VIDEOIO_H
-#include <sys/videoio.h>
-#else
-#if HAVE_ASM_TYPES_H
-#include <asm/types.h>
-#endif
-#include <linux/videodev2.h>
-#endif
-#include "libavutil/atomic.h"
-#include "libavutil/avassert.h"
-#include "libavutil/imgutils.h"
-#include "libavutil/log.h"
-#include "libavutil/opt.h"
-#include "avdevice.h"
-#include "timefilter.h"
-#include "libavutil/parseutils.h"
-#include "libavutil/pixdesc.h"
-#include "libavutil/time.h"
-#include "libavutil/avstring.h"
+#include "v4l2-common.h"
 
 #if CONFIG_LIBV4L2
 #include <libv4l2.h>
@@ -128,45 +102,6 @@ struct buff_data {
     int index;
 };
 
-struct fmt_map {
-    enum AVPixelFormat ff_fmt;
-    enum AVCodecID codec_id;
-    uint32_t v4l2_fmt;
-};
-
-static struct fmt_map fmt_conversion_table[] = {
-    //ff_fmt           codec_id           v4l2_fmt
-    { AV_PIX_FMT_YUV420P, AV_CODEC_ID_RAWVIDEO, V4L2_PIX_FMT_YUV420  },
-    { AV_PIX_FMT_YUV420P, AV_CODEC_ID_RAWVIDEO, V4L2_PIX_FMT_YVU420  },
-    { AV_PIX_FMT_YUV422P, AV_CODEC_ID_RAWVIDEO, V4L2_PIX_FMT_YUV422P },
-    { AV_PIX_FMT_YUYV422, AV_CODEC_ID_RAWVIDEO, V4L2_PIX_FMT_YUYV    },
-    { AV_PIX_FMT_UYVY422, AV_CODEC_ID_RAWVIDEO, V4L2_PIX_FMT_UYVY    },
-    { AV_PIX_FMT_YUV411P, AV_CODEC_ID_RAWVIDEO, V4L2_PIX_FMT_YUV411P },
-    { AV_PIX_FMT_YUV410P, AV_CODEC_ID_RAWVIDEO, V4L2_PIX_FMT_YUV410  },
-    { AV_PIX_FMT_YUV410P, AV_CODEC_ID_RAWVIDEO, V4L2_PIX_FMT_YVU410  },
-    { AV_PIX_FMT_RGB555LE,AV_CODEC_ID_RAWVIDEO, V4L2_PIX_FMT_RGB555  },
-    { AV_PIX_FMT_RGB555BE,AV_CODEC_ID_RAWVIDEO, V4L2_PIX_FMT_RGB555X },
-    { AV_PIX_FMT_RGB565LE,AV_CODEC_ID_RAWVIDEO, V4L2_PIX_FMT_RGB565  },
-    { AV_PIX_FMT_RGB565BE,AV_CODEC_ID_RAWVIDEO, V4L2_PIX_FMT_RGB565X },
-    { AV_PIX_FMT_BGR24,   AV_CODEC_ID_RAWVIDEO, V4L2_PIX_FMT_BGR24   },
-    { AV_PIX_FMT_RGB24,   AV_CODEC_ID_RAWVIDEO, V4L2_PIX_FMT_RGB24   },
-    { AV_PIX_FMT_BGR0,    AV_CODEC_ID_RAWVIDEO, V4L2_PIX_FMT_BGR32   },
-    { AV_PIX_FMT_0RGB,    AV_CODEC_ID_RAWVIDEO, V4L2_PIX_FMT_RGB32   },
-    { AV_PIX_FMT_GRAY8,   AV_CODEC_ID_RAWVIDEO, V4L2_PIX_FMT_GREY    },
-#ifdef V4L2_PIX_FMT_Y16
-    { AV_PIX_FMT_GRAY16LE,AV_CODEC_ID_RAWVIDEO, V4L2_PIX_FMT_Y16     },
-#endif
-    { AV_PIX_FMT_NV12,    AV_CODEC_ID_RAWVIDEO, V4L2_PIX_FMT_NV12    },
-    { AV_PIX_FMT_NONE,    AV_CODEC_ID_MJPEG,    V4L2_PIX_FMT_MJPEG   },
-    { AV_PIX_FMT_NONE,    AV_CODEC_ID_MJPEG,    V4L2_PIX_FMT_JPEG    },
-#ifdef V4L2_PIX_FMT_H264
-    { AV_PIX_FMT_NONE,    AV_CODEC_ID_H264,     V4L2_PIX_FMT_H264    },
-#endif
-#ifdef V4L2_PIX_FMT_CPIA1
-    { AV_PIX_FMT_NONE,    AV_CODEC_ID_CPIA,     V4L2_PIX_FMT_CPIA1   },
-#endif
-};
-
 static int device_open(AVFormatContext *ctx)
 {
     struct v4l2_capability cap;
@@ -275,49 +210,6 @@ static int first_field(int fd)
     return 1;
 }
 
-static uint32_t fmt_ff2v4l(enum AVPixelFormat pix_fmt, enum AVCodecID codec_id)
-{
-    int i;
-
-    for (i = 0; i < FF_ARRAY_ELEMS(fmt_conversion_table); i++) {
-        if ((codec_id == AV_CODEC_ID_NONE ||
-             fmt_conversion_table[i].codec_id == codec_id) &&
-            (pix_fmt == AV_PIX_FMT_NONE ||
-             fmt_conversion_table[i].ff_fmt == pix_fmt)) {
-            return fmt_conversion_table[i].v4l2_fmt;
-        }
-    }
-
-    return 0;
-}
-
-static enum AVPixelFormat fmt_v4l2ff(uint32_t v4l2_fmt, enum AVCodecID codec_id)
-{
-    int i;
-
-    for (i = 0; i < FF_ARRAY_ELEMS(fmt_conversion_table); i++) {
-        if (fmt_conversion_table[i].v4l2_fmt == v4l2_fmt &&
-            fmt_conversion_table[i].codec_id == codec_id) {
-            return fmt_conversion_table[i].ff_fmt;
-        }
-    }
-
-    return AV_PIX_FMT_NONE;
-}
-
-static enum AVCodecID fmt_v4l2codec(uint32_t v4l2_fmt)
-{
-    int i;
-
-    for (i = 0; i < FF_ARRAY_ELEMS(fmt_conversion_table); i++) {
-        if (fmt_conversion_table[i].v4l2_fmt == v4l2_fmt) {
-            return fmt_conversion_table[i].codec_id;
-        }
-    }
-
-    return AV_CODEC_ID_NONE;
-}
-
 #if HAVE_STRUCT_V4L2_FRMIVALENUM_DISCRETE
 static void list_framesizes(AVFormatContext *ctx, int fd, uint32_t pixelformat)
 {
@@ -349,8 +241,8 @@ static void list_formats(AVFormatContext *ctx, int fd, int type)
     struct v4l2_fmtdesc vfd = { .type = V4L2_BUF_TYPE_VIDEO_CAPTURE };
 
     while(!v4l2_ioctl(fd, VIDIOC_ENUM_FMT, &vfd)) {
-        enum AVCodecID codec_id = fmt_v4l2codec(vfd.pixelformat);
-        enum AVPixelFormat pix_fmt = fmt_v4l2ff(vfd.pixelformat, codec_id);
+        enum AVCodecID codec_id = avpriv_fmt_v4l2codec(vfd.pixelformat);
+        enum AVPixelFormat pix_fmt = avpriv_fmt_v4l2ff(vfd.pixelformat, codec_id);
 
         vfd.index++;
 
@@ -825,7 +717,7 @@ static int device_try_init(AVFormatContext *s1,
 {
     int ret, i;
 
-    *desired_format = fmt_ff2v4l(pix_fmt, s1->video_codec_id);
+    *desired_format = avpriv_fmt_ff2v4l(pix_fmt, s1->video_codec_id);
 
     if (*desired_format) {
         ret = device_init(s1, width, height, *desired_format);
@@ -837,14 +729,14 @@ static int device_try_init(AVFormatContext *s1,
     }
 
     if (!*desired_format) {
-        for (i = 0; i<FF_ARRAY_ELEMS(fmt_conversion_table); i++) {
+        for (i = 0; avpriv_fmt_conversion_table[i].codec_id != AV_CODEC_ID_NONE; i++) {
             if (s1->video_codec_id == AV_CODEC_ID_NONE ||
-                fmt_conversion_table[i].codec_id == s1->video_codec_id) {
+                avpriv_fmt_conversion_table[i].codec_id == s1->video_codec_id) {
                 av_log(s1, AV_LOG_DEBUG, "Trying to set codec:%s pix_fmt:%s\n",
-                       avcodec_get_name(fmt_conversion_table[i].codec_id),
-                       (char *)av_x_if_null(av_get_pix_fmt_name(fmt_conversion_table[i].ff_fmt), "none"));
+                       avcodec_get_name(avpriv_fmt_conversion_table[i].codec_id),
+                       (char *)av_x_if_null(av_get_pix_fmt_name(avpriv_fmt_conversion_table[i].ff_fmt), "none"));
 
-                *desired_format = fmt_conversion_table[i].v4l2_fmt;
+                *desired_format = avpriv_fmt_conversion_table[i].v4l2_fmt;
                 ret = device_init(s1, width, height, *desired_format);
                 if (ret >= 0)
                     break;
@@ -863,7 +755,7 @@ static int device_try_init(AVFormatContext *s1,
         }
     }
 
-    *codec_id = fmt_v4l2codec(*desired_format);
+    *codec_id = avpriv_fmt_v4l2codec(*desired_format);
     av_assert0(*codec_id != AV_CODEC_ID_NONE);
     return ret;
 }
@@ -986,7 +878,7 @@ static int v4l2_read_header(AVFormatContext *s1)
     if ((res = v4l2_set_parameters(s1)) < 0)
         return res;
 
-    st->codec->pix_fmt = fmt_v4l2ff(desired_format, codec_id);
+    st->codec->pix_fmt = avpriv_fmt_v4l2ff(desired_format, codec_id);
     s->frame_size =
         avpicture_get_size(st->codec->pix_fmt, s->width, s->height);