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vdpauh264dec: parse "pixel-aspect-ratio" from stream

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This commit is contained in:
Carl-Anton Ingmarsson 2010-09-02 01:32:10 +02:00
parent 5c03466309
commit 709a65cddf
1 changed files with 29 additions and 0 deletions
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29
sys/vdpau/h264/gstvdph264dec.c
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@ -238,6 +238,28 @@ gst_vdp_h264_dec_init_frame_info (GstVdpH264Dec * h264_dec,
}
static gboolean
gst_vdp_h264_dec_calculate_par (GstH264VUIParameters * vui, guint16 * par_n,
guint16 * par_d)
{
guint16 aspect[16][2] = { {1, 1}, {12, 11}, {10, 11}, {16, 11}, {40, 33},
{24, 11}, {20, 11}, {32, 11}, {80, 33}, {18, 11}, {15, 11}, {64, 33},
{160, 99}, {4, 3}, {3, 2}, {2, 1}
};
if (vui->aspect_ratio_idc >= 1 && vui->aspect_ratio_idc <= 16) {
*par_n = aspect[vui->aspect_ratio_idc - 1][0];
*par_d = aspect[vui->aspect_ratio_idc - 1][1];
return TRUE;
} else if (vui->aspect_ratio_idc == 255) {
*par_n = vui->sar_height;
*par_d = vui->sar_width;
return TRUE;
}
return FALSE;
}
static gboolean
gst_vdp_h264_dec_idr (GstVdpH264Dec * h264_dec, GstH264Frame * h264_frame)
{
@ -281,8 +303,15 @@ gst_vdp_h264_dec_idr (GstVdpH264Dec * h264_dec, GstH264Frame * h264_frame)
/* calculate framerate if we haven't got one */
if (state.fps_n == 0 && seq->vui_parameters_present_flag) {
GstH264VUIParameters *vui;
guint16 par_n, par_d;
vui = &seq->vui_parameters;
if (gst_vdp_h264_dec_calculate_par (vui, &par_n, &par_d)) {
state.par_n = par_n;
state.par_d = par_d;
}
if (vui->timing_info_present_flag && vui->fixed_frame_rate_flag) {
state.fps_n = vui->time_scale;
state.fps_d = vui->num_units_in_tick;