Add a simple capture feature (-capture)

If a specified key is pressed during playback, the current stream is
captured to a file, similar to what -dumpstream achieves.

original patch by Pásztor Szilárd, don tricon hu

Taken from the following svn commits, but with several fixes and
modifications (one obvious user-visible difference is that the default
key binding is 'C', not 'c'):

git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@32524 b3059339-0415-0410-9bf9-f77b7e298cf2

git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@32529 b3059339-0415-0410-9bf9-f77b7e298cf2

git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@32530 b3059339-0415-0410-9bf9-f77b7e298cf2

1 files changed, 38 insertions, 0 deletions

diff --git a/command.c b/command.c
index 60d04d4248..e367687c5a 100644
--- a/command.c
+++ b/command.c
@@ -1178,6 +1178,40 @@ static int mp_property_yuv_colorspace(m_option_t *prop, int action,
     return M_PROPERTY_NOT_IMPLEMENTED;
 }
 
+static int mp_property_capture(m_option_t *prop, int action,
+                               void *arg, MPContext *mpctx)
+{
+    struct MPOpts *opts = &mpctx->opts;
+
+    if (!mpctx->stream)
+        return M_PROPERTY_UNAVAILABLE;
+
+    if (!opts->capture_dump) {
+        mp_tmsg(MSGT_GLOBAL, MSGL_ERR,
+                "Capturing not enabled (forgot -capture parameter?)\n");
+        return M_PROPERTY_ERROR;
+    }
+
+    int capturing = !!mpctx->stream->capture_file;
+
+    int ret = m_property_flag(prop, action, arg, &capturing);
+    if (ret == M_PROPERTY_OK && capturing != !!mpctx->stream->capture_file) {
+        if (capturing) {
+            mpctx->stream->capture_file = fopen(opts->stream_dump_name, "wb");
+            if (!mpctx->stream->capture_file) {
+                mp_tmsg(MSGT_GLOBAL, MSGL_ERR,
+                        "Error opening capture file: %s\n", strerror(errno));
+                ret = M_PROPERTY_ERROR;
+            }
+        } else {
+            fclose(mpctx->stream->capture_file);
+            mpctx->stream->capture_file = NULL;
+        }
+    }
+
+    return ret;
+}
+
 /// Panscan (RW)
 static int mp_property_panscan(m_option_t *prop, int action, void *arg,
                                MPContext *mpctx)
@@ -2158,6 +2192,8 @@ static const m_option_t mp_properties[] = {
      0, 0, 0, NULL },
     { "pause", mp_property_pause, CONF_TYPE_FLAG,
      M_OPT_RANGE, 0, 1, NULL },
+    { "capturing", mp_property_capture, CONF_TYPE_FLAG,
+     M_OPT_RANGE, 0, 1, NULL },
 
     // Audio
     { "volume", mp_property_volume, CONF_TYPE_FLOAT,
@@ -2330,6 +2366,7 @@ static struct property_osd_display {
     // general
     { "loop", 0, -1, _("Loop: %s") },
     { "chapter", -1, -1, NULL },
+    { "capturing", 0, -1, _("Capturing: %s") },
     // audio
     { "volume", OSD_VOLUME, -1, _("Volume") },
     { "mute", 0, -1, _("Mute: %s") },
@@ -2456,6 +2493,7 @@ static struct {
     { "chapter", MP_CMD_SEEK_CHAPTER, 0},
     { "angle", MP_CMD_SWITCH_ANGLE, 0},
     { "pause", MP_CMD_PAUSE, 0},
+    { "capturing", MP_CMD_CAPTURING, 1},
     // audio
     { "volume", MP_CMD_VOLUME, 0},
     { "mute", MP_CMD_MUTE, 1},