From 82cdfe8ba341800323c467e0c3810d7a0ebf9177 Mon Sep 17 00:00:00 2001 From: Wim Taymans Date: Sun, 2 Apr 2000 21:38:36 +0000 Subject: [PATCH] The new riff parser and encoder Original commit message from CVS: The new riff parser and encoder --- libs/riff/gstriffencode.c | 178 ++++++++++++++++++++++++++++++++ libs/riff/gstriffparse.c | 210 ++++++++++++++++++++++++++++++++++++++ libs/riff/gstriffutil.c | 46 +++++++++ 3 files changed, 434 insertions(+) create mode 100644 libs/riff/gstriffencode.c create mode 100644 libs/riff/gstriffparse.c create mode 100644 libs/riff/gstriffutil.c diff --git a/libs/riff/gstriffencode.c b/libs/riff/gstriffencode.c new file mode 100644 index 0000000000..b4f7456566 --- /dev/null +++ b/libs/riff/gstriffencode.c @@ -0,0 +1,178 @@ +/* Gnome-Streamer + * Copyright (C) <1999> Erik Walthinsen + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Library General Public + * License as published by the Free Software Foundation; either + * version 2 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Library General Public License for more details. + * + * You should have received a copy of the GNU Library General Public + * License along with this library; if not, write to the + * Free Software Foundation, Inc., 59 Temple Place - Suite 330, + * Boston, MA 02111-1307, USA. + */ + + +#include + +#define GST_RIFF_ENCODER_BUF_SIZE 1024 + +//#define debug(format,args...) g_print(format,##args) +#define debug(format,args...) + +#define ADD_CHUNK(riffenc, chunkid, chunksize) \ +{ \ + gst_riff_chunk *chunk;\ + chunk = (gst_riff_chunk *)(riffenc->dataleft + riffenc->nextlikely);\ + chunk->id = chunkid; \ + chunk->size = chunksize; \ + riffenc->nextlikely += sizeof(gst_riff_chunk); \ +} + +#define ADD_LIST(riffenc, listsize, listtype) \ +{ \ + gst_riff_list *list;\ + list = (gst_riff_list *)(riffenc->dataleft + riffenc->nextlikely); \ + list->id = GST_RIFF_TAG_LIST; \ + list->size = listsize; \ + list->type = listtype; \ + riffenc->nextlikely += sizeof(gst_riff_list); \ +} + + +GstRiff *gst_riff_encoder_new(guint32 type) { + GstRiff *riff; + gst_riff_list *list; + + debug("gst_riff_encoder: making %4.4s encoder\n", (char *)&type); + riff = (GstRiff *)g_malloc(sizeof(GstRiff)); + g_return_val_if_fail(riff != NULL, NULL); + + riff->form = 0; + riff->chunks = NULL; + riff->state = GST_RIFF_STATE_INITIAL; + riff->curoffset = 0; + riff->incomplete_chunk = NULL; + riff->dataleft = g_malloc(GST_RIFF_ENCODER_BUF_SIZE); + riff->dataleft_size = GST_RIFF_ENCODER_BUF_SIZE; + riff->nextlikely = 0; + + list = (gst_riff_list *)riff->dataleft; + list->id = GST_RIFF_TAG_RIFF; + list->size = 0x00FFFFFF; + list->type = GST_RIFF_RIFF_AVI; + + riff->nextlikely += sizeof(gst_riff_list); + + return riff; +} + +gint gst_riff_encoder_avih(GstRiff *riff, gst_riff_avih *head, gulong size) { + gst_riff_chunk *chunk; + + g_return_val_if_fail(riff->state == GST_RIFF_STATE_INITIAL, GST_RIFF_EINVAL); + + debug("gst_riff_encoder: add avih\n"); + + ADD_LIST(riff, 0xB8, GST_RIFF_LIST_hdrl); + + ADD_CHUNK(riff, GST_RIFF_TAG_avih, size); + + chunk = (gst_riff_chunk *)(riff->dataleft + riff->nextlikely); + memcpy(chunk, head, size); + riff->nextlikely += size; + + riff->state = GST_RIFF_STATE_HASAVIH; + return GST_RIFF_OK; +} + +gint gst_riff_encoder_strh(GstRiff *riff, guint32 fcc_type, gst_riff_strh *head, gulong size) { + gst_riff_chunk *chunk; + + g_return_val_if_fail(riff->state == GST_RIFF_STATE_HASAVIH || + riff->state == GST_RIFF_STATE_HASSTRF, GST_RIFF_EINVAL); + + debug("gst_riff_encoder: add strh type %08x (%4.4s)\n", fcc_type, (char *)&fcc_type); + + ADD_LIST(riff, 108, GST_RIFF_LIST_strl); + + ADD_CHUNK(riff, GST_RIFF_TAG_strh, size); + + chunk = (gst_riff_chunk *)(riff->dataleft + riff->nextlikely); + head->type = fcc_type; + memcpy(chunk, head, size); + + riff->nextlikely += size; + + riff->state = GST_RIFF_STATE_HASSTRH; + return GST_RIFF_OK; +} + +gint gst_riff_encoder_strf(GstRiff *riff, void *format, gulong size) { + gst_riff_chunk *chunk; + + g_return_val_if_fail(riff->state == GST_RIFF_STATE_HASSTRH, GST_RIFF_EINVAL); + + debug("gst_riff_encoder: add strf\n"); + + ADD_CHUNK(riff, GST_RIFF_TAG_strf, size); + + chunk = (gst_riff_chunk *)(riff->dataleft + riff->nextlikely); + memcpy(chunk, format, size); + riff->nextlikely += size; + + riff->state = GST_RIFF_STATE_HASSTRF; + return GST_RIFF_OK; +} + +gint gst_riff_encoder_chunk(GstRiff *riff, guint32 chunk_type, void *chunkdata, gulong size) { + gst_riff_chunk *chunk; + + g_return_val_if_fail(riff->state == GST_RIFF_STATE_HASSTRF || + riff->state == GST_RIFF_STATE_MOVI, GST_RIFF_EINVAL); + + if (riff->state != GST_RIFF_STATE_MOVI) { + ADD_LIST(riff, 0x00FFFFFF, GST_RIFF_LIST_movi); + riff->state = GST_RIFF_STATE_MOVI; + } + + debug("gst_riff_encoder: add chunk type %08x (%4.4s)\n", chunk_type, (char *)&chunk_type); + + ADD_CHUNK(riff, chunk_type, size); + + if (chunkdata != NULL) { + chunk = (gst_riff_chunk *)(riff->dataleft + riff->nextlikely); + memcpy(chunk, chunkdata, size); + riff->nextlikely += size; + } + + return GST_RIFF_OK; +} + +GstBuffer *gst_riff_encoder_get_buffer(GstRiff *riff) { + GstBuffer *newbuf; + + newbuf = gst_buffer_new(); + GST_BUFFER_DATA(newbuf) = riff->dataleft; + GST_BUFFER_SIZE(newbuf) = riff->nextlikely; + + return newbuf; +} + +GstBuffer *gst_riff_encoder_get_and_reset_buffer(GstRiff *riff) { + GstBuffer *newbuf; + + newbuf = gst_riff_encoder_get_buffer(riff); + + riff->dataleft = g_malloc(GST_RIFF_ENCODER_BUF_SIZE); + riff->dataleft_size = GST_RIFF_ENCODER_BUF_SIZE; + riff->nextlikely = 0; + + return newbuf; +} + diff --git a/libs/riff/gstriffparse.c b/libs/riff/gstriffparse.c new file mode 100644 index 0000000000..1548b8da98 --- /dev/null +++ b/libs/riff/gstriffparse.c @@ -0,0 +1,210 @@ +/* Gnome-Streamer + * Copyright (C) <1999> Erik Walthinsen + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Library General Public + * License as published by the Free Software Foundation; either + * version 2 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Library General Public License for more details. + * + * You should have received a copy of the GNU Library General Public + * License along with this library; if not, write to the + * Free Software Foundation, Inc., 59 Temple Place - Suite 330, + * Boston, MA 02111-1307, USA. + */ + + +#include + +//#define debug(format,args...) g_print(format,##args) +#define debug(format,args...) + + +GstRiff *gst_riff_parser_new(GstRiffCallback function, gpointer data) { + GstRiff *riff; + + riff = (GstRiff *)g_malloc(sizeof(GstRiff)); + g_return_val_if_fail(riff != NULL, NULL); + + riff->form = 0; + riff->chunks = NULL; + riff->state = 0; + riff->curoffset = 0; + riff->nextlikely = 0; + riff->new_tag_found = function; + riff->callback_data = data; + riff->incomplete_chunk = NULL; + riff->dataleft = NULL; + + return riff; +} + +gint gst_riff_parser_next_buffer(GstRiff *riff,GstBuffer *buf,gulong off) { + gulong last, size; + GstRiffChunk *chunk; + + g_return_val_if_fail(riff != NULL, GST_RIFF_EINVAL); + g_return_val_if_fail(buf != NULL, GST_RIFF_EINVAL); + g_return_val_if_fail(GST_BUFFER_DATA(buf) != NULL, GST_RIFF_EINVAL); + + size = GST_BUFFER_SIZE(buf); + last = off + size; + + debug("gst_riff_parser: offset new buffer 0x%08lx size 0x%08x\n", off, GST_BUFFER_SIZE(buf)); + + if (riff->dataleft) { + gulong newsize; + + debug("gst_riff_parser: recovering left data\n"); + newsize = riff->dataleft_size + size; + riff->dataleft = g_realloc(riff->dataleft, newsize); + memcpy(riff->dataleft+riff->dataleft_size, GST_BUFFER_DATA(buf), size); + gst_buffer_unref(buf); + + buf = gst_buffer_new(); + GST_BUFFER_DATA(buf) = riff->dataleft; + GST_BUFFER_SIZE(buf) = newsize; + off -= riff->dataleft_size; + //last -= riff->dataleft_size; + riff->dataleft = NULL; + } + + if (off == 0) { + gulong *words = (gulong *)GST_BUFFER_DATA(buf); + + // don't even try to parse the head if it's not there FIXME + if (last < 12) { + riff->state = GST_RIFF_ENOTRIFF; + return riff->state; + } + + //g_print("testing is 0x%08lx '%s'\n",words[0],gst_riff_id_to_fourcc(words[0])); + /* verify this is a valid RIFF file, first of all */ + if (words[0] != GST_RIFF_TAG_RIFF) { + riff->state = GST_RIFF_ENOTRIFF; + return riff->state; + } + riff->form = words[2]; + //g_print("form is 0x%08lx '%s'\n",words[2],gst_riff_id_to_fourcc(words[2])); + riff->nextlikely = 12; /* skip 'RIFF', length, and form */ + // all OK here + riff->incomplete_chunk = NULL; + } + + // if we have an incomplete chunk from the previous buffer + if (riff->incomplete_chunk) { + guint leftover; + debug("gst_riff_parser: have incomplete chunk %08x filled\n", riff->incomplete_chunk_size); + leftover = riff->incomplete_chunk->size - riff->incomplete_chunk_size; + if (leftover <= size) { + debug("gst_riff_parser: we can fill it from %08x with %08x bytes = %08x\n", + riff->incomplete_chunk_size, leftover, + riff->incomplete_chunk_size+leftover); + memcpy(riff->incomplete_chunk->data+riff->incomplete_chunk_size, GST_BUFFER_DATA(buf), leftover); + + if (riff->new_tag_found) { + riff->new_tag_found(riff->incomplete_chunk, riff->callback_data); + } + g_free(riff->incomplete_chunk->data); + g_free(riff->incomplete_chunk); + riff->incomplete_chunk = NULL; + } + else { + debug("gst_riff_parser: we cannot fill it %08x >= %08lx\n", leftover, size); + memcpy(riff->incomplete_chunk->data+riff->incomplete_chunk_size, GST_BUFFER_DATA(buf), size); + riff->incomplete_chunk_size += size; + return 0; + } + } + + if ((riff->nextlikely+12) > last) { + guint left = last - riff->nextlikely; + debug("gst_riff_parser: not enough data next 0x%08x last 0x%08lx %08x %08x\n",riff->nextlikely, + last, left, off); + + riff->dataleft = g_malloc(left); + riff->dataleft_size = left; + memcpy(riff->dataleft, GST_BUFFER_DATA(buf)+size-left, left); + + return 0; + } + + debug("gst_riff_parser: next 0x%08x last 0x%08lx offset %08x\n",riff->nextlikely, last, off); + /* loop while the next likely chunk header is in this buffer */ + while ((riff->nextlikely+12) <= last) { + gulong *words = (gulong *)((guchar *)GST_BUFFER_DATA(buf) + riff->nextlikely - off ); + + // loop over all of the chunks to check which one is finished + while (riff->chunks) { + chunk = g_list_nth_data(riff->chunks, 0); + + debug("gst_riff_parser: next 0x%08x offset 0x%08lx size 0x%08x\n",riff->nextlikely, + chunk->offset, chunk->size); + if (riff->nextlikely >= chunk->offset+chunk->size) { + debug("gst_riff_parser: found END LIST\n"); + // we have the end of the chunk on the stack, remove it + riff->chunks = g_list_remove(riff->chunks, chunk); + } + else break; + } + + debug("gst_riff_parser: next likely chunk is at offset 0x%08x\n",riff->nextlikely); + + chunk = (GstRiffChunk *)g_malloc(sizeof(GstRiffChunk)); + g_return_val_if_fail(chunk != NULL, GST_RIFF_ENOMEM); + + chunk->offset = riff->nextlikely+8; /* point to the actual data */ + chunk->id = words[0]; + chunk->size = words[1]; + chunk->data = (gchar *)(words+2); + // we need word alignment + //if (chunk->size & 0x01) chunk->size++; + chunk->form = words[2]; /* fill in the form, might not be valid */ + + + if (chunk->id == GST_RIFF_TAG_LIST) { + //g_print("found LIST %s\n", gst_riff_id_to_fourcc(chunk->form)); + riff->nextlikely += 12; + // we push the list chunk on our 'stack' + riff->chunks = g_list_prepend(riff->chunks,chunk); + // send the buffer to the listener if we have received a function + if (riff->new_tag_found) { + riff->new_tag_found(chunk, riff->callback_data); + } + } + else { + + debug("gst_riff_parser: chunk id offset %08x is 0x%08lx '%s' and is 0x%08lx long\n", + riff->nextlikely, words[0], + gst_riff_id_to_fourcc(words[0]),words[1]); + + riff->nextlikely += 8 + chunk->size; /* doesn't include hdr */ + // if this buffer is incomplete + if (riff->nextlikely > last) { + guint left = size - (riff->nextlikely - chunk->size - off); + + //g_print("make incomplete buffer %08x\n", left); + chunk->data = g_malloc(chunk->size); + memcpy(chunk->data, (gchar *)(words+2), left); + riff->incomplete_chunk = chunk; + riff->incomplete_chunk_size = left; + } + else { + // send the buffer to the listener if we have received a function + if (riff->new_tag_found) { + riff->new_tag_found(chunk, riff->callback_data); + } + g_free(chunk); + } + + //riff->chunks = g_list_prepend(riff->chunks,chunk); + } + } + + return 0; +} + diff --git a/libs/riff/gstriffutil.c b/libs/riff/gstriffutil.c new file mode 100644 index 0000000000..1a4e7a5e99 --- /dev/null +++ b/libs/riff/gstriffutil.c @@ -0,0 +1,46 @@ +/* Gnome-Streamer + * Copyright (C) <1999> Erik Walthinsen + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Library General Public + * License as published by the Free Software Foundation; either + * version 2 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Library General Public License for more details. + * + * You should have received a copy of the GNU Library General Public + * License along with this library; if not, write to the + * Free Software Foundation, Inc., 59 Temple Place - Suite 330, + * Boston, MA 02111-1307, USA. + */ + + +#include + +//#define debug(format,args...) g_print(format,##args) +#define debug(format,args...) + + +gulong gst_riff_fourcc_to_id(gchar *fourcc) { + g_return_val_if_fail(fourcc != NULL, 0); + + return (fourcc[0] << 0) | (fourcc[1] << 8) | + (fourcc[2] << 16) | (fourcc[3] << 24); +} + +gchar *gst_riff_id_to_fourcc(gulong id) { + gchar *fourcc = (gchar *)g_malloc(5); + + g_return_val_if_fail(fourcc != NULL, NULL); + + fourcc[0] = (id >> 0) & 0xff; + fourcc[1] = (id >> 8) & 0xff; + fourcc[2] = (id >> 16) & 0xff; + fourcc[3] = (id >> 24) & 0xff; + fourcc[4] = 0; + + return fourcc; +}