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qtdemux: extract pixel-aspect-ratio information

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This commit is contained in:
Mark Nauwelaerts 2009-06-09 15:36:50 +02:00
parent fc9779bd86
commit 0f0117aabb
2 changed files with 58 additions and 2 deletions
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58
gst/qtdemux/qtdemux.c
View file

@ -188,6 +188,11 @@ struct _QtDemuxStream
/* video info */
gint width;
gint height;
/* aspect ratio */
gint display_width;
gint display_height;
gint par_w;
gint par_h;
/* Numerator/denominator framerate */
gint fps_n;
gint fps_d;
@ -3223,6 +3228,35 @@ gst_qtdemux_add_stream (GstQTDemux * qtdemux,
"height", G_TYPE_INT, stream->height,
"framerate", GST_TYPE_FRACTION, stream->fps_n, stream->fps_d, NULL);
/* iso files:
* calculate pixel-aspect-ratio using display width and height */
if (qtdemux->major_brand != FOURCC_qt__) {
GST_DEBUG_OBJECT (qtdemux,
"video size %dx%d, target display size %dx%d", stream->width,
stream->height, stream->display_width, stream->display_height);
if (stream->display_width > 0 && stream->display_height > 0 &&
stream->width > 0 && stream->height > 0) {
gint n, d;
/* calculate the pixel aspect ratio using the display and pixel w/h */
n = stream->display_width * stream->height;
d = stream->display_height * stream->width;
if (n != d) {
GST_DEBUG_OBJECT (qtdemux, "setting PAR to %d/%d", n, d);
gst_caps_set_simple (stream->caps, "pixel-aspect-ratio",
GST_TYPE_FRACTION, n, d, NULL);
}
}
}
/* qt file might have pasp atom */
if (stream->par_w > 0 && stream->par_h > 0) {
GST_DEBUG_OBJECT (qtdemux, "par %d:%d", stream->par_w, stream->par_h);
gst_caps_set_simple (stream->caps, "pixel-aspect-ratio",
GST_TYPE_FRACTION, stream->par_w, stream->par_h, NULL);
}
depth = stream->bits_per_sample;
/* more than 32 bits means grayscale */
@ -3826,6 +3860,7 @@ qtdemux_parse_trak (GstQTDemux * qtdemux, GNode * trak)
GNode *mp4v;
GNode *wave;
GNode *esds;
GNode *pasp;
QtDemuxStream *stream;
GstTagList *list = NULL;
gchar *codec = NULL;
@ -3919,9 +3954,15 @@ qtdemux_parse_trak (GstQTDemux * qtdemux, GNode * trak)
if (stream->subtype == FOURCC_vide) {
guint32 fourcc;
const guint8 *tkhd_data = (const guint8 *) tkhd->data;
stream->sampled = TRUE;
/* version 1 uses some 64-bit ints */
offset = (QT_UINT8 (tkhd_data + 8) == 1) ? 96 : 84;
stream->display_width = (guint) QT_FP32 (tkhd_data + offset);
stream->display_height = (guint) QT_FP32 (tkhd_data + offset + 4);
offset = 16;
stream->fourcc = fourcc = QT_FOURCC (stsd_data + offset + 4);
GST_LOG_OBJECT (qtdemux, "st type: %" GST_FOURCC_FORMAT,
@ -3951,9 +3992,22 @@ qtdemux_parse_trak (GstQTDemux * qtdemux, GNode * trak)
}
esds = NULL;
pasp = NULL;
mp4v = qtdemux_tree_get_child_by_type (stsd, FOURCC_mp4v);
if (mp4v)
if (mp4v) {
esds = qtdemux_tree_get_child_by_type (mp4v, FOURCC_esds);
pasp = qtdemux_tree_get_child_by_type (mp4v, FOURCC_pasp);
}
if (pasp) {
const guint8 *pasp_data = (const guint8 *) pasp->data;
stream->par_w = QT_UINT32 (pasp_data + 8);
stream->par_h = QT_UINT32 (pasp_data + 12);
} else {
stream->par_w = 0;
stream->par_h = 0;
}
if (esds) {
gst_qtdemux_handle_esds (qtdemux, stream, esds, list);
@ -4854,7 +4908,7 @@ qtdemux_tag_add_blob (GNode * node, GstQTDemux * demux)
if (QT_FOURCC (data + 4) == FOURCC_____ ||
(len > 8 + 12 && QT_FOURCC (data + 12) == FOURCC_data))
style = "itunes";
else if (demux->major_brand == GST_MAKE_FOURCC ('q', 't', ' ', ' '))
else if (demux->major_brand == FOURCC_qt__)
style = "quicktime";
/* fall back to assuming iso/3gp tag style */
else

2
gst/qtdemux/qtdemux_fourcc.h
View file

@ -25,6 +25,7 @@
G_BEGIN_DECLS
#define FOURCC_ftyp GST_MAKE_FOURCC('f','t','y','p')
#define FOURCC_qt__ GST_MAKE_FOURCC('q','t',' ',' ')
#define FOURCC_moov GST_MAKE_FOURCC('m','o','o','v')
#define FOURCC_mvhd GST_MAKE_FOURCC('m','v','h','d')
#define FOURCC_clip GST_MAKE_FOURCC('c','l','i','p')
@ -75,6 +76,7 @@ G_BEGIN_DECLS
#define FOURCC_wave GST_MAKE_FOURCC('w','a','v','e')
#define FOURCC_appl GST_MAKE_FOURCC('a','p','p','l')
#define FOURCC_esds GST_MAKE_FOURCC('e','s','d','s')
#define FOURCC_pasp GST_MAKE_FOURCC('p','a','s','p')
#define FOURCC_hnti GST_MAKE_FOURCC('h','n','t','i')
#define FOURCC_rtp_ GST_MAKE_FOURCC('r','t','p',' ')
#define FOURCC_sdp_ GST_MAKE_FOURCC('s','d','p',' ')