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rtph264depay: Make output in AVC stream format work even without complete sprop-parameter-set
This allows outputting streams in AVC format even if the SPS/PPS are sent inside the RTP stream. https://bugzilla.gnome.org/show_bug.cgi?id=654850 Ported from master
This commit is contained in:
Olivier Crête
parent
e819b60f27
commit
06f1c1817e
2 changed files with 342 additions and 98 deletions
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@ -24,6 +24,7 @@
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#include <stdio.h>
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#include <string.h>
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#include <gst/base/gstbitreader.h>
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#include <gst/rtp/gstrtpbuffer.h>
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#include "gstrtph264depay.h"
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@ -153,6 +154,10 @@ gst_rtp_h264_depay_init (GstRtpH264Depay * rtph264depay)
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rtph264depay->picture_adapter = gst_adapter_new ();
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rtph264depay->byte_stream = DEFAULT_BYTE_STREAM;
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rtph264depay->merge = DEFAULT_ACCESS_UNIT;
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rtph264depay->sps = g_ptr_array_new_with_free_func (
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(GDestroyNotify) gst_buffer_unref);
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rtph264depay->pps = g_ptr_array_new_with_free_func (
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(GDestroyNotify) gst_buffer_unref);
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}
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static void
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@ -165,6 +170,9 @@ gst_rtp_h264_depay_reset (GstRtpH264Depay * rtph264depay)
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rtph264depay->last_keyframe = FALSE;
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rtph264depay->last_ts = 0;
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rtph264depay->current_fu_type = 0;
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rtph264depay->new_codec_data = FALSE;
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g_ptr_array_set_size (rtph264depay->sps, 0);
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g_ptr_array_set_size (rtph264depay->pps, 0);
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}
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static void
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@ -180,6 +188,9 @@ gst_rtp_h264_depay_finalize (GObject * object)
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g_object_unref (rtph264depay->adapter);
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g_object_unref (rtph264depay->picture_adapter);
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g_ptr_array_free (rtph264depay->sps, TRUE);
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g_ptr_array_free (rtph264depay->pps, TRUE);
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G_OBJECT_CLASS (parent_class)->finalize (object);
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}
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@ -284,18 +295,296 @@ gst_rtp_h264_depay_negotiate (GstRtpH264Depay * rtph264depay)
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}
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}
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/* Stolen from bad/gst/mpegtsdemux/payloader_parsers.c */
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/* variable length Exp-Golomb parsing according to H.264 spec 9.1*/
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static gboolean
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read_golomb (GstBitReader * br, guint32 * value)
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{
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guint8 b, leading_zeros = -1;
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*value = 1;
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for (b = 0; !b; leading_zeros++) {
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if (!gst_bit_reader_get_bits_uint8 (br, &b, 1))
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return FALSE;
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*value *= 2;
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}
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*value = (*value >> 1) - 1;
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if (leading_zeros > 0) {
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guint32 tmp = 0;
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if (!gst_bit_reader_get_bits_uint32 (br, &tmp, leading_zeros))
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return FALSE;
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*value += tmp;
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}
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return TRUE;
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}
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static gboolean
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parse_sps (GstMapInfo * map, guint32 * sps_id)
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{
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GstBitReader br = GST_BIT_READER_INIT (map->data + 4,
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map->size - 4);
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if (map->size < 5)
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return FALSE;
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if (!read_golomb (&br, sps_id))
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return FALSE;
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return TRUE;
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}
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static gboolean
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parse_pps (GstMapInfo * map, guint32 * sps_id, guint32 * pps_id)
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{
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GstBitReader br = GST_BIT_READER_INIT (map->data + 1,
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map->size - 1);
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if (map->size < 2)
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return FALSE;
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if (!read_golomb (&br, pps_id))
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return FALSE;
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if (!read_golomb (&br, sps_id))
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return FALSE;
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return TRUE;
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}
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static gboolean
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gst_rtp_h264_set_src_caps (GstRtpH264Depay * rtph264depay)
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{
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gboolean res;
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GstCaps *srccaps;
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guchar level = 0;
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guchar profile_compat = G_MAXUINT8;
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if (!rtph264depay->byte_stream &&
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(!rtph264depay->new_codec_data ||
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rtph264depay->sps->len == 0 || rtph264depay->pps->len == 0))
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return TRUE;
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srccaps = gst_caps_new_simple ("video/x-h264",
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"stream-format", G_TYPE_STRING,
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rtph264depay->byte_stream ? "byte-stream" : "avc",
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"alignment", G_TYPE_STRING, rtph264depay->merge ? "au" : "nal", NULL);
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if (!rtph264depay->byte_stream) {
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GstBuffer *codec_data;
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GstMapInfo map;
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GstMapInfo nalmap;
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guint8 *data;
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guint len;
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guint new_size;
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guint i;
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/* start with 7 bytes header */
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len = 7;
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/* count sps & pps */
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for (i = 0; i < rtph264depay->sps->len; i++)
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len += 2 + gst_buffer_get_size (g_ptr_array_index (rtph264depay->sps, i));
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for (i = 0; i < rtph264depay->pps->len; i++)
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len += 2 + gst_buffer_get_size (g_ptr_array_index (rtph264depay->pps, i));
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codec_data = gst_buffer_new_and_alloc (len);
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g_debug ("alloc_len: %u", len);
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gst_buffer_map (codec_data, &map, GST_MAP_READWRITE);
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data = map.data;
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/* 8 bits version == 1 */
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*data++ = 1;
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/* According to: ISO/IEC 14496-15:2004(E) section 5.2.4.1
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* The level is the max level of all SPSes
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* A profile compat bit can only be set if all SPSes include that bit
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*/
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for (i = 0; i < rtph264depay->sps->len; i++) {
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gst_buffer_map (g_ptr_array_index (rtph264depay->sps, i), &nalmap,
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GST_MAP_READ);
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profile_compat &= nalmap.data[2];
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level = MAX (level, nalmap.data[3]);
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gst_buffer_unmap (g_ptr_array_index (rtph264depay->sps, i), &nalmap);
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}
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/* Assume all SPSes use the same profile, so extract from the first SPS */
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gst_buffer_map (g_ptr_array_index (rtph264depay->sps, 0), &nalmap,
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GST_MAP_READ);
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*data++ = nalmap.data[1];
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gst_buffer_unmap (g_ptr_array_index (rtph264depay->sps, 0), &nalmap);
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*data++ = profile_compat;
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*data++ = level;
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/* 6 bits reserved | 2 bits lengthSizeMinusOn */
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*data++ = 0xff;
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/* 3 bits reserved | 5 bits numOfSequenceParameterSets */
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*data++ = 0xe0 | (rtph264depay->sps->len & 0x1f);
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/* copy all SPS */
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for (i = 0; i < rtph264depay->sps->len; i++) {
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gst_buffer_map (g_ptr_array_index (rtph264depay->sps, i), &nalmap,
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GST_MAP_READ);
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GST_DEBUG_OBJECT (rtph264depay, "copy SPS %d of length %d", i,
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nalmap.size);
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GST_WRITE_UINT16_BE (data, nalmap.size);
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data += 2;
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memcpy (data, nalmap.data, nalmap.size);
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data += nalmap.size;
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gst_buffer_unmap (g_ptr_array_index (rtph264depay->sps, i), &nalmap);
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}
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/* 8 bits numOfPictureParameterSets */
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*data++ = rtph264depay->pps->len;
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/* copy all PPS */
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for (i = 0; i < rtph264depay->pps->len; i++) {
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gst_buffer_map (g_ptr_array_index (rtph264depay->pps, i), &nalmap,
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GST_MAP_READ);
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GST_DEBUG_OBJECT (rtph264depay, "copy PPS %d of length %d", i,
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nalmap.size);
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GST_WRITE_UINT16_BE (data, nalmap.size);
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data += 2;
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memcpy (data, nalmap.data, nalmap.size);
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data += nalmap.size;
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gst_buffer_unmap (g_ptr_array_index (rtph264depay->pps, i), &nalmap);
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}
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new_size = data - map.data;
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gst_buffer_unmap (codec_data, &map);
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gst_buffer_set_size (codec_data, new_size);
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gst_caps_set_simple (srccaps,
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"codec_data", GST_TYPE_BUFFER, codec_data, NULL);
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gst_buffer_unref (codec_data);
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}
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res = gst_pad_set_caps (GST_RTP_BASE_DEPAYLOAD_SRCPAD (rtph264depay),
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srccaps);
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gst_caps_unref (srccaps);
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if (res)
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rtph264depay->new_codec_data = FALSE;
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return res;
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}
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static gboolean
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gst_rtp_h264_add_sps_pps (GstRtpH264Depay * rtph264depay, GstBuffer * nal)
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{
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GstMapInfo map;
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guchar type;
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guint i;
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gst_buffer_map (nal, &map, GST_MAP_READ);
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type = map.data[0] & 0x1f;
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if (type == 7) {
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guint32 sps_id;
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if (!parse_sps (&map, &sps_id)) {
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GST_WARNING_OBJECT (rtph264depay, "Invalid SPS,"
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" can't parse seq_parameter_set_id");
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goto drop;
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}
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for (i = 0; i < rtph264depay->sps->len; i++) {
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GstBuffer *sps = g_ptr_array_index (rtph264depay->sps, i);
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GstMapInfo spsmap;
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guint32 tmp_sps_id;
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gst_buffer_map (sps, &spsmap, GST_MAP_READ);
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parse_sps (&spsmap, &tmp_sps_id);
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if (sps_id == tmp_sps_id) {
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if (map.size == spsmap.size &&
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memcmp (map.data, spsmap.data, spsmap.size) == 0) {
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GST_LOG_OBJECT (rtph264depay, "Unchanged SPS %u, not updating",
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sps_id);
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gst_buffer_unmap (sps, &spsmap);
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goto drop;
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} else {
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gst_buffer_unmap (sps, &spsmap);
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g_ptr_array_remove_index_fast (rtph264depay->sps, i);
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g_ptr_array_add (rtph264depay->sps, nal);
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GST_LOG_OBJECT (rtph264depay, "Modified SPS %u, replacing", sps_id);
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goto done;
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}
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}
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gst_buffer_unmap (sps, &spsmap);
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}
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GST_LOG_OBJECT (rtph264depay, "Adding new SPS %u", sps_id);
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g_ptr_array_add (rtph264depay->sps, nal);
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} else if (type == 8) {
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guint32 sps_id;
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guint32 pps_id;
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if (!parse_pps (&map, &sps_id, &pps_id)) {
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GST_WARNING_OBJECT (rtph264depay, "Invalid PPS,"
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" can't parse seq_parameter_set_id or pic_parameter_set_id");
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goto drop;
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}
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for (i = 0; i < rtph264depay->pps->len; i++) {
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GstBuffer *pps = g_ptr_array_index (rtph264depay->pps, i);
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GstMapInfo ppsmap;
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guint32 tmp_sps_id;
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guint32 tmp_pps_id;
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gst_buffer_map (pps, &ppsmap, GST_MAP_READ);
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parse_pps (&ppsmap, &tmp_sps_id, &tmp_pps_id);
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if (sps_id == tmp_sps_id && pps_id == tmp_pps_id) {
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if (map.size == ppsmap.size &&
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memcmp (map.data, ppsmap.data, ppsmap.size) == 0) {
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GST_LOG_OBJECT (rtph264depay, "Unchanged PPS %u:%u, not updating",
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sps_id, pps_id);
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gst_buffer_unmap (pps, &ppsmap);
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goto drop;
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} else {
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gst_buffer_unmap (pps, &ppsmap);
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g_ptr_array_remove_index_fast (rtph264depay->pps, i);
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g_ptr_array_add (rtph264depay->pps, nal);
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GST_LOG_OBJECT (rtph264depay, "Modified PPS %u:%u, replacing",
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sps_id, pps_id);
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goto done;
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}
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}
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gst_buffer_unmap (pps, &ppsmap);
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}
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GST_LOG_OBJECT (rtph264depay, "Adding new PPS %u:%i", sps_id, pps_id);
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g_ptr_array_add (rtph264depay->pps, nal);
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} else {
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goto drop;
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}
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done:
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gst_buffer_unmap (nal, &map);
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rtph264depay->new_codec_data = TRUE;
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return TRUE;
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drop:
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gst_buffer_unmap (nal, &map);
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gst_buffer_unref (nal);
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return FALSE;
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}
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static gboolean
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gst_rtp_h264_depay_setcaps (GstRTPBaseDepayload * depayload, GstCaps * caps)
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{
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GstCaps *srccaps;
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gint clock_rate;
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GstStructure *structure = gst_caps_get_structure (caps, 0);
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GstRtpH264Depay *rtph264depay;
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const gchar *ps, *profile;
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const gchar *ps;
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GstBuffer *codec_data;
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GstMapInfo map;
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guint8 *ptr;
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gboolean res;
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rtph264depay = GST_RTP_H264_DEPAY (depayload);
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@ -303,12 +592,8 @@ gst_rtp_h264_depay_setcaps (GstRTPBaseDepayload * depayload, GstCaps * caps)
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clock_rate = 90000;
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depayload->clock_rate = clock_rate;
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srccaps = gst_caps_new_empty_simple ("video/x-h264");
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/* Base64 encoded, comma separated config NALs */
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ps = gst_structure_get_string (structure, "sprop-parameter-sets");
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/* hex: AVCProfileIndication:8 | profile_compat:8 | AVCLevelIndication:8 */
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profile = gst_structure_get_string (structure, "profile-level-id");
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/* negotiate with downstream w.r.t. output format and alignment */
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gst_rtp_h264_depay_negotiate (rtph264depay);
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@ -361,125 +646,52 @@ gst_rtp_h264_depay_setcaps (GstRTPBaseDepayload * depayload, GstCaps * caps)
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rtph264depay->codec_data = codec_data;
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} else if (!rtph264depay->byte_stream) {
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gchar **params;
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guint8 **sps, **pps;
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guint len, num_sps, num_pps;
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gint i;
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if (ps == NULL)
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goto incomplete_caps;
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params = g_strsplit (ps, ",", 0);
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len = g_strv_length (params);
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GST_DEBUG_OBJECT (depayload, "we have %d params", len);
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sps = g_new0 (guint8 *, len + 1);
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pps = g_new0 (guint8 *, len + 1);
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num_sps = num_pps = 0;
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GST_DEBUG_OBJECT (depayload, "we have %d params", g_strv_length (params));
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/* start with 7 bytes header */
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len = 7;
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for (i = 0; params[i]; i++) {
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GstBuffer *nal;
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GstMapInfo nalmap;
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gsize nal_len;
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guint8 *nalp;
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guint save = 0;
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gint state = 0;
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nal_len = strlen (params[i]);
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nalp = g_malloc (nal_len + 2);
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nal = gst_buffer_new_and_alloc (nal_len);
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gst_buffer_map (nal, &nalmap, GST_MAP_READWRITE);
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nal_len =
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g_base64_decode_step (params[i], nal_len, nalp + 2, &state, &save);
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nalp[0] = (nal_len >> 8) & 0xff;
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nalp[1] = nal_len & 0xff;
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len += nal_len + 2;
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g_base64_decode_step (params[i], nal_len, nalmap.data, &state, &save);
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/* copy to the right list */
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if ((nalp[2] & 0x1f) == 7) {
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GST_DEBUG_OBJECT (depayload, "adding param %d as SPS %d", i, num_sps);
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sps[num_sps++] = nalp;
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} else {
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GST_DEBUG_OBJECT (depayload, "adding param %d as PPS %d", i, num_pps);
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pps[num_pps++] = nalp;
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}
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GST_DEBUG_OBJECT (depayload, "adding param %d as %s", i,
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((nalmap.data[0] & 0x1f) == 7) ? "SPS" : "PPS");
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gst_buffer_unmap (nal, &nalmap);
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gst_buffer_set_size (nal, nal_len);
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gst_rtp_h264_add_sps_pps (rtph264depay, nal);
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}
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g_strfreev (params);
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if (num_sps == 0 || (GST_READ_UINT16_BE (sps[0]) < 3) || num_pps == 0) {
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g_strfreev ((gchar **) pps);
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g_strfreev ((gchar **) sps);
|
||||
if (rtph264depay->sps->len == 0 || rtph264depay->pps->len == 0)
|
||||
goto incomplete_caps;
|
||||
}
|
||||
|
||||
codec_data = gst_buffer_new_and_alloc (len);
|
||||
|
||||
gst_buffer_map (codec_data, &map, GST_MAP_WRITE);
|
||||
ptr = map.data;
|
||||
|
||||
/* 8 bits version == 1 */
|
||||
*ptr++ = 1;
|
||||
if (profile) {
|
||||
guint32 profile_id;
|
||||
|
||||
/* hex: AVCProfileIndication:8 | profile_compat:8 | AVCLevelIndication:8 */
|
||||
sscanf (profile, "%6x", &profile_id);
|
||||
*ptr++ = (profile_id >> 16) & 0xff;
|
||||
*ptr++ = (profile_id >> 8) & 0xff;
|
||||
*ptr++ = profile_id & 0xff;
|
||||
} else {
|
||||
/* extract from SPS */
|
||||
*ptr++ = sps[0][3];
|
||||
*ptr++ = sps[0][4];
|
||||
*ptr++ = sps[0][5];
|
||||
}
|
||||
/* 6 bits reserved | 2 bits lengthSizeMinusOn */
|
||||
*ptr++ = 0xff;
|
||||
/* 3 bits reserved | 5 bits numOfSequenceParameterSets */
|
||||
*ptr++ = 0xe0 | (num_sps & 0x1f);
|
||||
|
||||
/* copy all SPS */
|
||||
for (i = 0; sps[i]; i++) {
|
||||
len = ((sps[i][0] << 8) | sps[i][1]) + 2;
|
||||
GST_DEBUG_OBJECT (depayload, "copy SPS %d of length %d", i, len);
|
||||
memcpy (ptr, sps[i], len);
|
||||
g_free (sps[i]);
|
||||
ptr += len;
|
||||
}
|
||||
g_free (sps);
|
||||
/* 8 bits numOfPictureParameterSets */
|
||||
*ptr++ = num_pps;
|
||||
/* copy all PPS */
|
||||
for (i = 0; pps[i]; i++) {
|
||||
len = ((pps[i][0] << 8) | pps[i][1]) + 2;
|
||||
GST_DEBUG_OBJECT (depayload, "copy PPS %d of length %d", i, len);
|
||||
memcpy (ptr, pps[i], len);
|
||||
g_free (pps[i]);
|
||||
ptr += len;
|
||||
}
|
||||
g_free (pps);
|
||||
gst_buffer_resize (codec_data, 0, ptr - map.data);
|
||||
gst_buffer_unmap (codec_data, &map);
|
||||
|
||||
gst_caps_set_simple (srccaps,
|
||||
"codec_data", GST_TYPE_BUFFER, codec_data, NULL);
|
||||
gst_buffer_unref (codec_data);
|
||||
}
|
||||
|
||||
gst_caps_set_simple (srccaps, "stream-format", G_TYPE_STRING,
|
||||
rtph264depay->byte_stream ? "byte-stream" : "avc",
|
||||
"alignment", G_TYPE_STRING, rtph264depay->merge ? "au" : "nal", NULL);
|
||||
|
||||
res = gst_pad_set_caps (depayload->srcpad, srccaps);
|
||||
gst_caps_unref (srccaps);
|
||||
|
||||
return res;
|
||||
return gst_rtp_h264_set_src_caps (rtph264depay);
|
||||
|
||||
/* ERRORS */
|
||||
incomplete_caps:
|
||||
{
|
||||
GST_DEBUG_OBJECT (depayload, "we have incomplete caps");
|
||||
gst_caps_unref (srccaps);
|
||||
return FALSE;
|
||||
GST_DEBUG_OBJECT (depayload, "we have incomplete caps,"
|
||||
" doing setcaps later");
|
||||
return TRUE;
|
||||
}
|
||||
}
|
||||
|
||||
|
|
@ -531,6 +743,33 @@ gst_rtp_h264_depay_handle_nal (GstRtpH264Depay * rtph264depay, GstBuffer * nal,
|
|||
out_keyframe = keyframe;
|
||||
out_timestamp = in_timestamp;
|
||||
|
||||
if (!rtph264depay->byte_stream) {
|
||||
if (nal_type == 7 || nal_type == 8) {
|
||||
gst_rtp_h264_add_sps_pps (rtph264depay,
|
||||
gst_buffer_copy_region (nal, GST_BUFFER_COPY_ALL,
|
||||
4, gst_buffer_get_size (nal) - 4));
|
||||
gst_buffer_unmap (nal, &map);
|
||||
gst_buffer_unref (nal);
|
||||
return NULL;
|
||||
} else if (rtph264depay->sps->len == 0 || rtph264depay->pps->len == 0) {
|
||||
/* Down push down any buffer in non-bytestream mode if the SPS/PPS haven't
|
||||
* go through yet
|
||||
*/
|
||||
gst_pad_push_event (GST_RTP_BASE_DEPAYLOAD_SINKPAD (depayload),
|
||||
gst_event_new_custom (GST_EVENT_CUSTOM_UPSTREAM,
|
||||
gst_structure_new ("GstForceKeyUnit",
|
||||
"all-headers", G_TYPE_BOOLEAN, TRUE, NULL)));
|
||||
gst_buffer_unmap (nal, &map);
|
||||
gst_buffer_unref (nal);
|
||||
return FALSE;
|
||||
}
|
||||
|
||||
if (rtph264depay->new_codec_data &&
|
||||
rtph264depay->sps->len > 0 && rtph264depay->pps->len > 0)
|
||||
gst_rtp_h264_set_src_caps (rtph264depay);
|
||||
}
|
||||
|
||||
|
||||
if (rtph264depay->merge) {
|
||||
gboolean start = FALSE, complete = FALSE;
|
||||
|
||||
|
|
|
|||
|
|
@ -61,6 +61,11 @@ struct _GstRtpH264Depay
|
|||
guint8 current_fu_type;
|
||||
GstClockTime fu_timestamp;
|
||||
gboolean fu_marker;
|
||||
|
||||
/* misc */
|
||||
GPtrArray *sps;
|
||||
GPtrArray *pps;
|
||||
gboolean new_codec_data;
|
||||
};
|
||||
|
||||
struct _GstRtpH264DepayClass
|
||||
|
|
|
|||
Loading…
Reference in a new issue