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h264parse: provide w/h from stream in src caps if not in sink caps
This commit is contained in:
Mark Nauwelaerts
parent
291f45b383
commit
f3a153eecb
2 changed files with 96 additions and 6 deletions
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@ -441,6 +441,8 @@ gst_sps_decode_vui (GstH264Parse * h, GstNalBs * bs)
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sps->num_units_in_tick = num_units_in_tick;
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sps->time_scale = time_scale;
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sps->fixed_frame_rate_flag = gst_nal_bs_read (bs, 1);
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GST_DEBUG_OBJECT (h, "timing info: dur=%d/%d fixed=%d",
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num_units_in_tick, time_scale, sps->fixed_frame_rate_flag);
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}
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GST_DEBUG_OBJECT (h,
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@ -1012,24 +1014,85 @@ gst_h264_parse_get_property (GObject * object, guint prop_id, GValue * value,
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}
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}
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static gboolean
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gst_h264_parse_update_src_caps (GstH264Parse * h264parse, GstCaps * caps)
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{
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GstH264Sps *sps;
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GstCaps *src_caps = NULL;
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g_return_val_if_fail (caps != NULL, FALSE);
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sps = h264parse->sps;
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src_caps = gst_caps_ref (caps);
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/* if some upstream metadata missing, fill in from parsed stream */
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/* width / height */
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if (sps && (!h264parse->width || !h264parse->height)) {
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gint width, height;
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width = h264parse->width = sps->width;
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height = h264parse->height = sps->height;
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GST_DEBUG_OBJECT (h264parse, "updating caps w/h %dx%d", width, height);
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gst_caps_replace (&src_caps, gst_caps_copy (src_caps));
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gst_caps_unref (src_caps);
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gst_caps_set_simple (src_caps, "width", G_TYPE_INT, width,
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"height", G_TYPE_INT, height, NULL);
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}
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/* framerate */
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if (sps && (!h264parse->fps_num && !h264parse->fps_den)) {
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gint fps_num, fps_den;
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fps_num = sps->time_scale;
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fps_den = sps->num_units_in_tick;
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/* FIXME verify / also handle other cases */
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if (fps_num && fps_den &&
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sps->fixed_frame_rate_flag && sps->frame_mbs_only_flag) {
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src_caps = gst_caps_copy (caps);
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GST_DEBUG_OBJECT (h264parse, "updating caps fps %d/%d", fps_num, fps_den);
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gst_caps_replace (&src_caps, gst_caps_copy (src_caps));
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gst_caps_unref (src_caps);
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gst_caps_set_simple (src_caps,
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"framerate", GST_TYPE_FRACTION, fps_num, fps_den, NULL);
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}
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}
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/* release extra ref */
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if (src_caps == caps)
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gst_caps_unref (src_caps);
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return src_caps != GST_PAD_CAPS (h264parse->srcpad) ?
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gst_pad_set_caps (h264parse->srcpad, src_caps) : TRUE;
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}
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static gboolean
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gst_h264_parse_sink_setcaps (GstPad * pad, GstCaps * caps)
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{
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gboolean res;
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GstH264Parse *h264parse;
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GstStructure *str;
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const GValue *value;
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guint8 *data;
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guint size;
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guint size, num_sps, num_pps;
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h264parse = GST_H264PARSE (GST_PAD_PARENT (pad));
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str = gst_caps_get_structure (caps, 0);
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/* accept upstream info if provided */
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gst_structure_get_int (str, "width", &h264parse->width);
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gst_structure_get_int (str, "height", &h264parse->height);
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gst_structure_get_fraction (str, "framerate", &h264parse->fps_num,
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&h264parse->fps_den);
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/* packetized video has a codec_data */
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if ((value = gst_structure_get_value (str, "codec_data"))) {
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GstBuffer *buffer;
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gint profile;
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GstNalBs bs;
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gint i, len;
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GST_DEBUG_OBJECT (h264parse, "have packetized h264");
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h264parse->packetized = TRUE;
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@ -1057,7 +1120,30 @@ gst_h264_parse_sink_setcaps (GstPad * pad, GstCaps * caps)
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h264parse->nal_length_size = (data[4] & 0x03) + 1;
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GST_DEBUG_OBJECT (h264parse, "nal length %u", h264parse->nal_length_size);
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/* FIXME, PPS, SPS have vital info for detecting new I-frames */
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num_sps = data[5] & 0x1f;
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data += 6;
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size -= 6;
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for (i = 0; i < num_sps; i++) {
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len = GST_READ_UINT16_BE (data);
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if (size < len + 2)
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goto avcc_too_small;
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gst_nal_bs_init (&bs, data + 2 + 1, len - 1);
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gst_nal_decode_sps (h264parse, &bs);
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data += len + 2;
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size -= len + 2;
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}
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num_pps = data[0];
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data++;
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size++;
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for (i = 0; i < num_pps; i++) {
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len = GST_READ_UINT16_BE (data);
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if (size < len + 2)
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goto avcc_too_small;
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gst_nal_bs_init (&bs, data + 2 + 1, len - 1);
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gst_nal_decode_pps (h264parse, &bs);
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data += len + 2;
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size -= len + 2;
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}
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} else {
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GST_DEBUG_OBJECT (h264parse, "have bytestream h264");
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h264parse->packetized = FALSE;
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@ -1066,9 +1152,7 @@ gst_h264_parse_sink_setcaps (GstPad * pad, GstCaps * caps)
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}
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/* forward the caps */
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res = gst_pad_set_caps (h264parse->srcpad, caps);
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return res;
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return gst_h264_parse_update_src_caps (h264parse, caps);
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/* ERRORS */
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avcc_too_small:
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@ -1302,6 +1386,8 @@ gst_h264_parse_chain_forward (GstH264Parse * h264parse, gboolean discont,
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case NAL_SPS:
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GST_DEBUG_OBJECT (h264parse, "we have an SPS NAL");
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gst_nal_decode_sps (h264parse, &bs);
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gst_h264_parse_update_src_caps (h264parse,
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GST_PAD_CAPS (h264parse->srcpad));
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break;
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case NAL_PPS:
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GST_DEBUG_OBJECT (h264parse, "we have a PPS NAL");
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@ -66,12 +66,16 @@ struct _GstH264Parse
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GstPad *srcpad;
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gboolean split_packetized;
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gboolean merge;
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guint nal_length_size;
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GstSegment segment;
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gboolean packetized;
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gboolean discont;
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gint width, height;
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gint fps_num, fps_den;
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/* gather/decode queues for reverse playback */
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GList *gather;
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GstBuffer *prev;
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