mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2025-02-17 03:35:21 +00:00
mpeg4videoparse: port to baseparse
This commit is contained in:
Mark Nauwelaerts
parent
49eeb43fe2
commit
afb5b28d66
5 changed files with 817 additions and 967 deletions
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@ -1,13 +1,13 @@
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plugin_LTLIBRARIES = libgstmpeg4videoparse.la
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libgstmpeg4videoparse_la_SOURCES = mpeg4videoparse.c
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libgstmpeg4videoparse_la_CFLAGS = $(GST_CFLAGS)
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libgstmpeg4videoparse_la_SOURCES = mpeg4videoparse.c mpeg4parse.c
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libgstmpeg4videoparse_la_CFLAGS = $(GST_BASE_CFLAGS) $(GST_CFLAGS)
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libgstmpeg4videoparse_la_LIBADD = $(GST_BASE_LIBS) $(GST_LIBS)
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libgstmpeg4videoparse_la_LDFLAGS = $(GST_PLUGIN_LDFLAGS)
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libgstmpeg4videoparse_la_LIBTOOLFLAGS = --tag=disable-static
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noinst_HEADERS = mpeg4videoparse.h
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noinst_HEADERS = mpeg4videoparse.h mpeg4parse.h
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Android.mk: Makefile.am $(BUILT_SOURCES)
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androgenizer \
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290
gst/mpeg4videoparse/mpeg4parse.c
Normal file
290
gst/mpeg4videoparse/mpeg4parse.c
Normal file
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@ -0,0 +1,290 @@
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/* GStreamer MPEG4-2 video Parser
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* Copyright (C) <2008> Mindfruit B.V.
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* @author Sjoerd Simons <sjoerd@luon.net>
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* Copyright (C) <2007> Julien Moutte <julien@fluendo.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#include "mpeg4parse.h"
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#include <gst/base/gstbitreader.h>
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GST_DEBUG_CATEGORY_EXTERN (mpeg4v_parse_debug);
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#define GST_CAT_DEFAULT mpeg4v_parse_debug
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#define GET_BITS(b, num, bits) G_STMT_START { \
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if (!gst_bit_reader_get_bits_uint32(b, bits, num)) \
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goto failed; \
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} G_STMT_END
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#define MARKER_BIT(b) G_STMT_START { \
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guint32 i; \
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GET_BITS(b, 1, &i); \
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if (i != 0x1) \
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goto failed; \
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} G_STMT_END
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static inline gboolean
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next_start_code (GstBitReader * b)
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{
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guint32 bits;
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GET_BITS (b, 1, &bits);
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if (bits != 0)
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goto failed;
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while (b->bit != 0) {
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GET_BITS (b, 1, &bits);
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if (bits != 0x1)
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goto failed;
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}
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return TRUE;
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failed:
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return FALSE;
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}
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static inline gboolean
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skip_user_data (GstBitReader * bs, guint32 * bits)
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{
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while (*bits == MPEG4_USER_DATA_STARTCODE_MARKER) {
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guint32 b;
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do {
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GET_BITS (bs, 8, &b);
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*bits = (*bits << 8) | b;
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} while ((*bits >> 8) != MPEG4_START_MARKER);
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}
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return TRUE;
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failed:
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return FALSE;
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}
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static gint aspect_ratio_table[6][2] = {
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{-1, -1}, {1, 1}, {12, 11}, {10, 11}, {16, 11}, {40, 33}
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};
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static gboolean
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gst_mpeg4_params_parse_vo (MPEG4Params * params, GstBitReader * br)
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{
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guint32 bits;
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guint16 time_increment_resolution = 0;
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guint16 fixed_time_increment = 0;
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gint aspect_ratio_width = -1, aspect_ratio_height = -1;
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gint height = -1, width = -1;
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/* expecting a video object startcode */
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GET_BITS (br, 32, &bits);
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if (bits > 0x11F)
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goto failed;
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/* expecting a video object layer startcode */
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GET_BITS (br, 32, &bits);
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if (bits < 0x120 || bits > 0x12F)
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goto failed;
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/* ignore random accessible vol and video object type indication */
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GET_BITS (br, 9, &bits);
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GET_BITS (br, 1, &bits);
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if (bits) {
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/* skip video object layer verid and priority */
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GET_BITS (br, 7, &bits);
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}
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/* aspect ratio info */
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GET_BITS (br, 4, &bits);
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if (bits == 0)
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goto failed;
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/* check if aspect ratio info is extended par */
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if (bits == 0xf) {
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GET_BITS (br, 8, &bits);
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aspect_ratio_width = bits;
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GET_BITS (br, 8, &bits);
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aspect_ratio_height = bits;
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} else if (bits < 0x6) {
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aspect_ratio_width = aspect_ratio_table[bits][0];
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aspect_ratio_height = aspect_ratio_table[bits][1];
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}
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GET_BITS (br, 1, &bits);
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if (bits) {
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/* vol control parameters, skip chroma and low delay */
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GET_BITS (br, 3, &bits);
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GET_BITS (br, 1, &bits);
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if (bits) {
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/* skip vbv_parameters */
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GET_BITS (br, 79, &bits);
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}
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}
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/* layer shape */
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GET_BITS (br, 2, &bits);
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/* only support rectangular */
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if (bits != 0)
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goto failed;
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MARKER_BIT (br);
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GET_BITS (br, 16, &bits);
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time_increment_resolution = bits;
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MARKER_BIT (br);
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GST_DEBUG ("time increment resolution %d", time_increment_resolution);
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GET_BITS (br, 1, &bits);
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if (bits) {
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/* fixed time increment */
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int n;
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/* Length of the time increment is the minimal number of bits needed to
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* represent time_increment_resolution */
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for (n = 0; (time_increment_resolution >> n) != 0; n++);
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GET_BITS (br, n, &bits);
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fixed_time_increment = bits;
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} else {
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/* When fixed_vop_rate is not set we can't guess any framerate */
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fixed_time_increment = 0;
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}
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GST_DEBUG ("fixed time increment %d", fixed_time_increment);
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/* assuming rectangular shape */
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MARKER_BIT (br);
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GET_BITS (br, 13, &bits);
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width = bits;
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MARKER_BIT (br);
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GET_BITS (br, 13, &bits);
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height = bits;
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MARKER_BIT (br);
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/* so we got it all, report back */
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params->width = width;
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params->height = height;
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params->time_increment_resolution = time_increment_resolution;
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params->fixed_time_increment = fixed_time_increment;
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params->aspect_ratio_width = aspect_ratio_width;
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params->aspect_ratio_height = aspect_ratio_height;
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return TRUE;
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/* ERRORS */
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failed:
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{
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GST_WARNING ("Failed to parse config data");
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return FALSE;
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}
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}
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static gboolean
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gst_mpeg4_params_parse_vos (MPEG4Params * params, GstBitReader * br)
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{
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guint32 bits;
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GET_BITS (br, 32, &bits);
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if (bits != MPEG4_VOS_STARTCODE_MARKER)
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goto failed;
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GET_BITS (br, 8, &bits);
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params->profile = bits;
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/* invalid profile, warn but carry on */
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if (params->profile == 0) {
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GST_WARNING ("Invalid profile in VOS");
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}
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/* Expect Visual Object startcode */
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GET_BITS (br, 32, &bits);
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/* but skip optional user data */
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if (!skip_user_data (br, &bits))
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goto failed;
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if (bits != MPEG4_VISUAL_OBJECT_STARTCODE_MARKER)
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goto failed;
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GET_BITS (br, 1, &bits);
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if (bits == 0x1) {
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/* Skip visual_object_verid and priority */
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GET_BITS (br, 7, &bits);
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}
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GET_BITS (br, 4, &bits);
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/* Only support video ID */
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if (bits != 0x1)
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goto failed;
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/* video signal type */
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GET_BITS (br, 1, &bits);
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if (bits == 0x1) {
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/* video signal type, ignore format and range */
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GET_BITS (br, 4, &bits);
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GET_BITS (br, 1, &bits);
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if (bits == 0x1) {
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/* ignore color description */
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GET_BITS (br, 24, &bits);
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}
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}
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if (!next_start_code (br))
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goto failed;
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/* skip optional user data */
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GET_BITS (br, 32, &bits);
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if (!skip_user_data (br, &bits))
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goto failed;
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/* rewind to start code */
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gst_bit_reader_set_pos (br, gst_bit_reader_get_pos (br) - 32);
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return gst_mpeg4_params_parse_vo (params, br);
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/* ERRORS */
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failed:
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{
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GST_WARNING ("Failed to parse config data");
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return FALSE;
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}
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}
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gboolean
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gst_mpeg4_params_parse_config (MPEG4Params * params, const guint8 * data,
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guint size)
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{
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GstBitReader br;
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if (size < 4)
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return FALSE;
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gst_bit_reader_init (&br, data, size);
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if (data[3] == MPEG4_VOS_STARTCODE)
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return gst_mpeg4_params_parse_vos (params, &br);
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else
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return gst_mpeg4_params_parse_vo (params, &br);
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}
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63
gst/mpeg4videoparse/mpeg4parse.h
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63
gst/mpeg4videoparse/mpeg4parse.h
Normal file
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@ -0,0 +1,63 @@
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/* GStreamer MPEG4-2 video Parser
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* Copyright (C) <2008> Mindfruit B.V.
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* @author Sjoerd Simons <sjoerd@luon.net>
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* Copyright (C) <2007> Julien Moutte <julien@fluendo.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#ifndef __GST_MPEG4_PARAMS_H__
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#define __GST_MPEG4_PARAMS_H__
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#include <gst/gst.h>
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G_BEGIN_DECLS
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#define MPEG4_VIDEO_OBJECT_STARTCODE_MIN 0x00
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#define MPEG4_VIDEO_OBJECT_STARTCODE_MAX 0x1F
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#define MPEG4_VOS_STARTCODE 0xB0
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#define MPEG4_VOS_ENDCODE 0xB1
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#define MPEG4_USER_DATA_STARTCODE 0xB2
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#define MPEG4_GOP_STARTCODE 0xB3
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#define MPEG4_VISUAL_OBJECT_STARTCODE 0xB5
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#define MPEG4_VOP_STARTCODE 0xB6
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#define MPEG4_START_MARKER 0x000001
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#define MPEG4_VISUAL_OBJECT_STARTCODE_MARKER \
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((MPEG4_START_MARKER << 8) + MPEG4_VISUAL_OBJECT_STARTCODE)
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#define MPEG4_VOS_STARTCODE_MARKER \
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((MPEG4_START_MARKER << 8) + MPEG4_VOS_STARTCODE)
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#define MPEG4_USER_DATA_STARTCODE_MARKER \
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((MPEG4_START_MARKER << 8) + MPEG4_USER_DATA_STARTCODE)
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typedef struct _MPEG4Params MPEG4Params;
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struct _MPEG4Params
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{
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gint profile;
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gint width, height;
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gint aspect_ratio_width, aspect_ratio_height;
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gint time_increment_resolution;
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gint fixed_time_increment;
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};
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GstFlowReturn gst_mpeg4_params_parse_config (MPEG4Params * params,
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const guint8 * data, guint size);
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G_END_DECLS
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#endif
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File diff suppressed because it is too large
Load diff
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@ -21,7 +21,9 @@
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#define __MPEG4VIDEOPARSE_H__
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#include <gst/gst.h>
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#include <gst/base/gstadapter.h>
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#include <gst/base/gstbaseparse.h>
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#include "mpeg4parse.h"
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G_BEGIN_DECLS
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@ -40,47 +42,30 @@ G_BEGIN_DECLS
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typedef struct _GstMpeg4VParse GstMpeg4VParse;
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typedef struct _GstMpeg4VParseClass GstMpeg4VParseClass;
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typedef enum {
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PARSE_NEED_START,
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PARSE_START_FOUND,
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PARSE_VO_FOUND,
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PARSE_VOS_FOUND,
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PARSE_VOP_FOUND
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} GstMpeg4VParseState;
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struct _GstMpeg4VParse {
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GstElement element;
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GstBaseParse element;
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GstPad * sinkpad;
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GstPad * srcpad;
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GstCaps *sink_caps;
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guint interval;
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GstClockTime last_report;
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GstAdapter * adapter;
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guint offset;
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guint vos_offset;
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/* parse state */
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gint last_sc;
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gint vop_offset;
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gint vos_offset;
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gint vo_offset;
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gboolean intra_frame;
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GstMpeg4VParseState state;
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GstClockTime timestamp;
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gboolean update_caps;
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GstBuffer *config;
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gboolean have_config;
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guint8 profile;
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GstClockTime frame_duration;
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MPEG4Params params;
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/* properties */
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gboolean drop;
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gboolean have_src_caps;
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GstEvent *pending_segment;
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GList *pending_events;
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guint interval;
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};
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struct _GstMpeg4VParseClass {
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GstElementClass parent_class;
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GstBaseParseClass parent_class;
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};
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GType gst_mpeg4vparse_get_type (void);
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