mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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2081f9ad65
Original commit message from CVS: Remove all config.h includes from header files, add it to each source file and remove duplicate config.h includes from several source files
250 lines
8 KiB
C
250 lines
8 KiB
C
/* GStreamer
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* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
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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 <string.h>
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/*#define DEBUG_ENABLED */
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#include <riff.h>
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GstRiff*
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gst_riff_parser_new (GstRiffCallback function, gpointer data)
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{
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GstRiff *riff;
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riff = (GstRiff *)g_malloc(sizeof(GstRiff));
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g_return_val_if_fail(riff != NULL, NULL);
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riff->form = 0;
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riff->chunks = NULL;
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riff->state = 0;
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riff->curoffset = 0;
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riff->nextlikely = 0;
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riff->new_tag_found = function;
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riff->callback_data = data;
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riff->incomplete_chunk = NULL;
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riff->dataleft = NULL;
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return riff;
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}
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gint
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gst_riff_parser_next_buffer (GstRiff *riff, GstBuffer *buf, gulong off)
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{
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gulong last, size;
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GstRiffChunk *chunk;
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g_return_val_if_fail(riff != NULL, GST_RIFF_EINVAL);
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g_return_val_if_fail(buf != NULL, GST_RIFF_EINVAL);
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g_return_val_if_fail(GST_BUFFER_DATA(buf) != NULL, GST_RIFF_EINVAL);
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size = GST_BUFFER_SIZE(buf);
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last = off + size;
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GST_DEBUG ("gst_riff_parser: offset new buffer 0x%08lx size 0x%08x", off, GST_BUFFER_SIZE(buf));
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if (riff->dataleft) {
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gulong newsize;
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GST_DEBUG ("gst_riff_parser: recovering left data");
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newsize = riff->dataleft_size + size;
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riff->dataleft = g_realloc(riff->dataleft, newsize);
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memcpy(riff->dataleft+riff->dataleft_size, GST_BUFFER_DATA(buf), size);
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gst_buffer_unref(buf);
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buf = gst_buffer_new();
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GST_BUFFER_DATA(buf) = riff->dataleft;
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size = GST_BUFFER_SIZE(buf) = newsize;
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off -= riff->dataleft_size;
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/*last -= riff->dataleft_size; */
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riff->dataleft = NULL;
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}
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if (off == 0) {
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guint32 *words = (guint32 *)GST_BUFFER_DATA(buf);
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/* don't even try to parse the head if it's not there FIXME */
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if (last < 12) {
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riff->state = GST_RIFF_ENOTRIFF;
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return riff->state;
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}
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/*g_print("testing is 0x%08lx '%s'\n",words[0],gst_riff_id_to_fourcc(words[0])); */
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/* verify this is a valid RIFF file, first of all */
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if (GUINT32_FROM_LE (words[0]) != GST_RIFF_TAG_RIFF) {
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riff->state = GST_RIFF_ENOTRIFF;
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return riff->state;
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}
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riff->form = GUINT32_FROM_LE (words[2]);
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/*g_print("form is 0x%08lx '%s'\n",words[2],gst_riff_id_to_fourcc(words[2])); */
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riff->nextlikely = 12; /* skip 'RIFF', length, and form */
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/* all OK here */
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riff->incomplete_chunk = NULL;
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}
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/* if we have an incomplete chunk from the previous buffer */
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if (riff->incomplete_chunk) {
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guint leftover;
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GST_DEBUG ("gst_riff_parser: have incomplete chunk %08x filled", riff->incomplete_chunk_size);
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leftover = riff->incomplete_chunk->size - riff->incomplete_chunk_size;
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if (leftover <= size) {
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GST_DEBUG ("gst_riff_parser: we can fill it from %08x with %08x bytes = %08x",
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riff->incomplete_chunk_size, leftover,
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riff->incomplete_chunk_size+leftover);
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memcpy(riff->incomplete_chunk->data+riff->incomplete_chunk_size, GST_BUFFER_DATA(buf), leftover);
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if (riff->new_tag_found) {
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riff->new_tag_found(riff->incomplete_chunk, riff->callback_data);
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}
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g_free(riff->incomplete_chunk->data);
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g_free(riff->incomplete_chunk);
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riff->incomplete_chunk = NULL;
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}
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else {
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GST_DEBUG ("gst_riff_parser: we cannot fill it %08x >= %08lx", leftover, size);
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memcpy(riff->incomplete_chunk->data+riff->incomplete_chunk_size, GST_BUFFER_DATA(buf), size);
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riff->incomplete_chunk_size += size;
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return 0;
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}
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}
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if (riff->nextlikely & 0x01) riff->nextlikely++;
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GST_DEBUG ("gst_riff_parser: next 0x%08x last 0x%08lx offset %08lx",riff->nextlikely, last, off);
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/* loop while the next likely chunk header is in this buffer */
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while ((riff->nextlikely+12) <= last) {
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guint32 *words = (guint32 *)((guchar *)GST_BUFFER_DATA(buf) + riff->nextlikely - off );
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/* loop over all of the chunks to check which one is finished */
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while (riff->chunks) {
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chunk = g_list_nth_data(riff->chunks, 0);
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GST_DEBUG ("gst_riff_parser: next 0x%08x offset 0x%08lx size 0x%08x",riff->nextlikely,
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chunk->offset, chunk->size);
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if (riff->nextlikely >= chunk->offset+chunk->size) {
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GST_DEBUG ("gst_riff_parser: found END LIST");
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/* we have the end of the chunk on the stack, remove it */
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riff->chunks = g_list_remove(riff->chunks, chunk);
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}
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else break;
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}
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GST_DEBUG ("gst_riff_parser: next likely chunk is at offset 0x%08x",riff->nextlikely);
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chunk = (GstRiffChunk *)g_malloc(sizeof(GstRiffChunk));
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g_return_val_if_fail(chunk != NULL, GST_RIFF_ENOMEM);
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chunk->offset = riff->nextlikely+8; /* point to the actual data */
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chunk->id = GUINT32_FROM_LE (words[0]);
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chunk->size = GUINT32_FROM_LE (words[1]);
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chunk->data = (gchar *)(words+2);
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/* we need word alignment */
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/*if (chunk->size & 0x01) chunk->size++; */
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chunk->form = GUINT32_FROM_LE (words[2]); /* fill in the form, might not be valid */
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if (chunk->id == GST_RIFF_TAG_LIST) {
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GST_DEBUG ("found LIST %s", gst_riff_id_to_fourcc(chunk->form));
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riff->nextlikely += 12;
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/* we push the list chunk on our 'stack' */
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riff->chunks = g_list_prepend(riff->chunks,chunk);
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/* send the buffer to the listener if we have received a function */
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if (riff->new_tag_found) {
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riff->new_tag_found(chunk, riff->callback_data);
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}
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}
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else {
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GST_DEBUG ("gst_riff_parser: chunk id offset %08x is 0x%08x '" GST_FOURCC_FORMAT "' and is 0x%08x long",
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riff->nextlikely, chunk->id, GST_FOURCC_ARGS(chunk->id),
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chunk->size);
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riff->nextlikely += 8 + chunk->size; /* doesn't include hdr */
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/* if this buffer is incomplete */
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if (riff->nextlikely > last) {
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guint left = size - (riff->nextlikely - chunk->size - off);
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GST_DEBUG ("make incomplete buffer %08x", left);
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chunk->data = g_malloc(chunk->size);
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memcpy(chunk->data, (gchar *)(words+2), left);
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riff->incomplete_chunk = chunk;
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riff->incomplete_chunk_size = left;
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}
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else {
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/* send the buffer to the listener if we have received a function */
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if (riff->new_tag_found) {
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riff->new_tag_found(chunk, riff->callback_data);
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}
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g_free(chunk);
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}
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if (riff->nextlikely & 0x01) riff->nextlikely++;
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/*riff->chunks = g_list_prepend(riff->chunks,chunk);*/
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}
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}
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if ((riff->nextlikely+12) > last && !riff->incomplete_chunk) {
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guint left = last - riff->nextlikely;
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GST_DEBUG ("gst_riff_parser: not enough data next 0x%08x last 0x%08lx %08x %08lx",riff->nextlikely,
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last, left, off);
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riff->dataleft = g_malloc(left);
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riff->dataleft_size = left;
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memcpy(riff->dataleft, GST_BUFFER_DATA(buf)+size-left, left);
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return 0;
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}
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return 0;
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}
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void
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gst_riff_parser_resync (GstRiff *riff, gulong offset)
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{
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riff->incomplete_chunk = NULL;
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riff->dataleft = NULL;
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riff->nextlikely = offset;
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}
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GstRiffChunk *gst_riff_parser_get_chunk(GstRiff *riff, guint32 fourcc)
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{
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GList *chunk;
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g_return_val_if_fail(riff != NULL, NULL);
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chunk = riff->chunks;
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while (chunk) {
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if (((GstRiffChunk *)(chunk->data))->id == fourcc)
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return (GstRiffChunk *)(chunk->data);
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chunk = g_list_next(chunk);
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}
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return NULL;
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}
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guint32 gst_riff_parser_get_nextlikely(GstRiff *riff)
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{
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g_return_val_if_fail(riff != NULL, 0);
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return riff->nextlikely;
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}
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